TWI779800B

TWI779800B - Relay logic for double-bus power system with tie circuit breaker and double-bus power system

Info

Publication number: TWI779800B
Application number: TW110131694A
Authority: TW
Inventors: 易沛勳; 蔡隆田
Original assignee: 台灣電力股份有限公司
Priority date: 2021-08-26
Filing date: 2021-08-26
Publication date: 2022-10-01
Also published as: TW202310528A

Abstract

The present invention discloses a relay logic and a double-bus power system. Wherein, a signal 87Z1 output by the SEL-487B relay controls the tie circuit breaker and the first circuit breaker of the double-bus power system, and a signal 87Z2 output by the SEL-487B relay controls the tie circuit breaker and the second circuit breaker of the double-bus power system. The relay logic of the SEL-487B relay includes a first AND gate and a second AND gate. The first AND gate has three first input terminals and a first output terminal. One of the first input terminals is connected to a signal PLT12, the other of the first input terminals is connected to a signal PCT06Q, and another one of the input terminals is connected to a reverse signal 87ST3. The second AND gate has two second input terminals and a second output terminal. One of the second input terminals is connected to the first output terminal, and the other of the second input terminals is connected to a signal 87R1 or a signal 87R2, and the second output terminal outputs the signal 87Z1 or the signal 87Z2.

Description

具有連絡斷路器之雙匯流排電力系統的保護電驛邏輯、與雙匯流排電力系統Protection relay logic for dual-bus-bar power systems with tie circuit breakers, and dual-bus-bar power systems

本發明關於一種保護電驛邏輯，特別關於一種具有連絡斷路器之雙匯流排電力系統的保護電驛邏輯、與應用該保護電驛邏輯的雙匯流排電力系統。The present invention relates to a protection relay logic, in particular to a protection relay logic of a double-bus-bar power system with a connection circuit breaker, and a double-bus-bar power system using the protection relay logic.

電力（供電）系統的匯流排(Bus)是發電廠及變電所的重要組成部分之一，由於匯流排所連接的電力與開關設備數量眾多，因此具有電力傳輸樞紐地位，是匯集與分配電能的重要設備。相較於輸電線路等設備，匯流排發生故障的機率雖然較低，但是匯流排故障的影響層面相當大，因此，裝設可快速隔離故障的匯流排保護電驛是十分重要的，匯流排保護電驛的拒動或誤動作都會對電力系統帶來嚴重危害。The bus bar (Bus) of the power (power supply) system is one of the important components of power plants and substations. Because the bus bar is connected to a large number of power and switchgear, it has the status of a power transmission hub and is a means of collecting and distributing electric energy. important equipment. Compared with transmission lines and other equipment, although the probability of busbar failure is low, the impact of busbar failure is quite large. Therefore, it is very important to install busbar protection relays that can quickly isolate faults. Busbar protection The refusal or malfunction of the relay will bring serious harm to the power system.

數位式匯流排保護電驛是使用可變比率抑制原理的分相式低阻抗匯流排差動保護，具有比流器飽和偵測閉鎖邏輯功能以及電流相位（方向性）判斷邏輯功能，可避免外部大故障電流引起比流器飽和後所產生的差電流造成匯流排電驛跳脫，強化匯流排保護的安全性。易言之，匯流排保護電驛除了力求內部故障時，電驛要快速動作的保護可靠之外，亦需著重考量外部故障發生時，不因比流器迴路異常(CT Failure)或比流器飽和造成匯流排保護電驛動作之保護安全性不足。因此，如何兼顧減輕設備之損壞及提供連續穩定之供電，關鍵取決於匯流排電驛的性能與邏輯規劃是否恰當。The digital busbar protection relay is a phase-splitting low-impedance busbar differential protection using the principle of variable ratio suppression. It has the logic function of current ratio saturation detection lockout and the logic function of current phase (direction) judgment, which can avoid external The difference current generated after the large fault current causes the saturation of the current transformer causes the busbar relay to trip, which strengthens the safety of the busbar protection. In other words, in addition to trying to protect the relay quickly and reliably when there is an internal fault, the busbar protection relay also needs to focus on considering that when an external fault occurs, it will not be caused by the abnormality of the current transformer circuit (CT Failure) or the current current transformer. Saturation results in insufficient protection and safety of the bus protection relay action. Therefore, how to reduce equipment damage and provide continuous and stable power supply depends on whether the performance and logic planning of the bus relay are appropriate.

以台灣電力公司的161kV電力系統的匯流排保護電驛為例，美國SEL公司製的SEL-487B型電驛占了近一半的數量，但因版本的不同，其邏輯規劃亦有所差異，導致於相同的假設情境下，電驛的動作情形會不一致。此外，部分版本於比流器迴路異常情況下若發生外部故障，則電驛會動作跳脫；部分的版本則在匯流排停電過程中或單一匯流排運轉情形下，保護功能會被閉鎖。Taking the busbar protection relays of the 161kV power system of Taiwan Power Company as an example, the SEL-487B type relays made by SEL Corporation of the United States accounted for nearly half of the number, but due to different versions, their logic planning is also different, resulting in Under the same hypothetical situation, the actions of the relay will be inconsistent. In addition, in some versions, if an external fault occurs in the abnormal condition of the current transformer circuit, the relay will trip; in some versions, the protection function will be blocked during the power failure of the bus or the operation of a single bus.

本發明的目的為提供一種具有連絡斷路器之雙匯流排電力系統的保護電驛邏輯及應用該保護電驛邏輯的雙匯流排電力系統，可改善現有版本SEL-487B電驛之保護邏輯的盲點，使具有連絡斷路器之雙匯流排電力系統可以提供穩定的供電。The purpose of the present invention is to provide a protection relay logic for a dual-bus-bar power system with a tie circuit breaker and a dual-bus-bar power system using the protection relay logic, which can improve the blind spot of the protection logic of the existing version SEL-487B relay , so that the double-bus-bar power system with a tie circuit breaker can provide stable power supply.

為達到上述目的，依據本發明的一種具有連絡斷路器之雙匯流排電力系統的保護電驛邏輯，雙匯流排電力系統包括一第一匯流排、一第二匯流排、連絡斷路器、一第一電力設備、一第二電力設備及一SEL-487B電驛，連絡斷路器連接於第一匯流排與第二匯流排之間，第一電力設備透過對應的一第一斷路器連接於第一匯流排，第二電力設備透過對應的一第二斷路器連接於第二匯流排，SEL-487B電驛電性連接連絡斷路器、第一斷路器及第二斷路器，SEL-487B電驛輸出的一訊號87Z1控制連絡斷路器及第一斷路器，SEL-487B電驛輸出的一訊號87Z2控制連絡斷路器及第二斷路器；SEL-487B電驛具有該保護電驛邏輯，該保護電驛邏輯包括一第一及閘以及一第二及閘。第一及閘具有三個第一輸入端及一第一輸出端，該些第一輸入端的其中之一連接一訊號PLT12，該些第一輸入端的其中另一連接一訊號PCT06Q，該些第一輸入端的其中又一連接反向的一訊號87ST3。第二及閘具有二個第二輸入端及一第二輸出端，該些第二輸入端的其中之一連接第一輸出端，該些第二輸入端的其中另一連接一訊號87R1或訊號87R2，且第二輸出端輸出訊號87Z1或訊號87Z2；其中，當應用於一第一區域(Zone 1)時，則該些第二輸入端的其中另一連接訊號87R1，第二輸出端輸出訊號87Z1；當應用於一第二區域(Zone 2)時，則該些第二輸入端的其中另一連接訊號87R2，且第二輸出端輸出訊號87Z2。In order to achieve the above object, according to the protection relay logic of a double busbar power system with a tie circuit breaker according to the present invention, the double busbar power system includes a first busbar, a second busbar, a tie circuit breaker, a first One electric device, one second electric device and one SEL-487B relay, the tie circuit breaker is connected between the first bus bar and the second bus bar, and the first electric device is connected to the first bus bar through a corresponding first circuit breaker. Bus bar, the second power equipment is connected to the second bus bar through a corresponding second circuit breaker, the SEL-487B relay is electrically connected to the tie circuit breaker, the first circuit breaker and the second circuit breaker, and the SEL-487B relay outputs A signal 87Z1 controls the tie circuit breaker and the first circuit breaker, and a signal 87Z2 output by the SEL-487B relay controls the tie circuit breaker and the second circuit breaker; the SEL-487B relay has the logic of the protection relay, and the protection relay The logic includes a first AND gate and a second AND gate. The first AND gate has three first input terminals and a first output terminal, one of the first input terminals is connected to a signal PLT12, the other of the first input terminals is connected to a signal PCT06Q, and the first input terminals are connected to a signal PCT06Q. Another one of the input terminals is connected to a reversed signal 87ST3. The second AND gate has two second input terminals and a second output terminal, one of the second input terminals is connected to the first output terminal, and the other of the second input terminals is connected to a signal 87R1 or a signal 87R2, And the second output terminal outputs a signal 87Z1 or a signal 87Z2; wherein, when applied to a first zone (Zone 1), the other one of the second input terminals is connected to the signal 87R1, and the second output terminal outputs a signal 87Z1; when When applied to a second zone (Zone 2), another of the second input terminals is connected to the signal 87R2, and the second output terminal outputs the signal 87Z2.

在一實施例中，第一電力設備或第二電力設備為電源或負載。In an embodiment, the first electric device or the second electric device is a power source or a load.

在一實施例中，該保護電驛邏輯更包括一判斷元件、一第一比較器及一第二比較器。當應用於第一區域(Zone 1)時，判斷元件的輸入端的其中之一連接一訊號IRT1，判斷元件的輸入端的其中另一連接一訊號IOP1；當應用於第二區域(Zone 2)時，判斷元件的輸入端的其中之一連接一訊號IRT2，判斷元件的輸入端的其中另一連接一訊號IOP2。當應用於第一區域(Zone 1)時，第一比較器的輸入端的其中之一連接一訊號IOP1，第一比較器的輸入端的其中另一連接一訊號O87P；當應用於第二區域(Zone 2)時，第一比較器的輸入端的其中之一連接一訊號IOP2，第一比較器的輸入端的其中另一連接訊號O87P。當應用於第一區域(Zone 1)時，第二比較器的輸入端的其中之一連接一訊號IOP1，第二比較器的輸入端的其中另一連接一訊號S87P；當應用於第二區域(Zone 2)時，第二比較器的輸入端的其中之一連接一訊號IOP2，第二比較器的輸入端的其中另一連接訊號S87P。In one embodiment, the protection relay logic further includes a judging element, a first comparator and a second comparator. When applied to the first zone (Zone 1), one of the input terminals of the judging element is connected to a signal IRT1, and the other of the input terminals of the judging element is connected to a signal IOP1; when applied to the second zone (Zone 2), One of the input ends of the judging element is connected to a signal IRT2, and the other of the input ends of the judging element is connected to a signal IOP2. When applied to the first zone (Zone 1), one of the input terminals of the first comparator is connected to a signal IOP1, and the other input terminal of the first comparator is connected to a signal O87P; when applied to the second zone (Zone 2), one of the input terminals of the first comparator is connected to a signal IOP2, and the other one of the input terminals of the first comparator is connected to a signal O87P. When applied to the first zone (Zone 1), one of the input terminals of the second comparator is connected to a signal IOP1, and the other of the input terminals of the second comparator is connected to a signal S87P; when applied to the second zone (Zone 2), one of the input terminals of the second comparator is connected to a signal IOP2, and the other of the input terminals of the second comparator is connected to the signal S87P.

在一實施例中，該保護電驛邏輯更包括一延時動作元件及一選擇元件。延時動作元件的輸入端連接第二比較器的輸出端。選擇元件的輸入端的其中之一連接延時動作元件的輸出端，其輸入端的其中另一連接一接地端。In one embodiment, the protection relay logic further includes a delay action element and a selection element. The input terminal of the delay action element is connected with the output terminal of the second comparator. One of the input ends of the selection element is connected to the output end of the delay action element, and the other of the input ends is connected to a ground end.

在一實施例中，該保護電驛邏輯更包括一第三及閘，第三及閘具有四個第三輸入端及一第三輸出端，該些第三輸入端的其中之一連接判斷元件的輸出端，該些第三輸入端的其中另一連接第一比較器的輸出端，該些第三輸入端的其中又一連接一訊號FAULT1或訊號FAULT2，選擇元件的輸出端輸出訊號的反向輸入該些第三輸入端的其中再一輸入端，第三及閘的輸出端輸出訊號87R1或訊號87R2；其中，當應用於第一區域(Zone 1)時，該些第三輸入端的其中又一連接訊號FAULT1，第三及閘的輸出端輸出訊號87R1；當應用於第二區域(Zone 2)時，該些第三輸入端的其中又一連接訊號FAULT2，第三及閘的輸出端輸出訊號87R2。In one embodiment, the protection relay logic further includes a third AND gate, the third AND gate has four third input terminals and a third output terminal, one of the third input terminals is connected to the judging element Output terminal, the other of the third input terminals is connected to the output terminal of the first comparator, another one of the third input terminals is connected to a signal FAULT1 or signal FAULT2, and the output terminal of the selection element outputs the reverse of the signal input to the One of the third input terminals, the output terminal of the third AND gate outputs a signal 87R1 or a signal 87R2; wherein, when applied to the first zone (Zone 1), another one of the third input terminals connects the signal FAULT1, the output terminal of the third AND gate outputs a signal 87R1; when applied to the second zone (Zone 2), another one of the third input terminals is connected to the signal FAULT2, and the output terminal of the third AND gate outputs a signal 87R2.

為達到上述目的，依據本發明的一種具有連絡斷路器之雙匯流排電力系統的保護電驛邏輯，雙匯流排電力系統包括一第一匯流排、一第二匯流排、連絡斷路器、一第一電力設備、一第二電力設備及一SEL-487B電驛，連絡斷路器連接於第一匯流排與第二匯流排之間，第一電力設備透過對應的一第一斷路器連接於第一匯流排，第二電力設備透過對應的一第二斷路器連接於第二匯流排，SEL-487B電驛輸出的一訊號87Z1控制連絡斷路器及第一斷路器，SEL-487B電驛輸出的一訊號87Z2控制連絡斷路器及第二斷路器；SEL-487B電驛具有該保護電驛邏輯，保護電驛邏輯包括一第一及閘、一第二及閘、一第三及閘以及一選擇元件。第一及閘具有三個第一輸入端及一第一輸出端，該些第一輸入端的其中之一連接一訊號PLT12，該些第一輸入端的其中另一連接反向的一訊號87STCZ1，該些第一輸入端的其中又一連接一訊號87CZ1。第二及閘具有二個第二輸入端及一第二輸出端，該些第二輸入端的其中之一連接第一輸出端，該些第二輸入端的其中另一連接一訊號87R1或訊號87R2，第二輸出端輸出訊號87Z1或訊號87Z2，其中當應用於一第一區域(Zone 1)時，則該些第二輸入端的其中另一連接訊號87R1，第二輸出端輸出訊號87Z1；當應用於一第二區域(Zone 2)時，則該些第二輸入端的其中另一連接訊號87R2，第二輸出端輸出訊號87Z2。第三及閘具有四個第三輸入端及一第三輸出端，該些第三輸入端的其中之一連接一訊號FDIF1或訊號FDIF2，該些第三輸入端的其中另一連接一訊號87O1或訊號87O2，該些第三輸入端的其中又一連接一訊號FAULT1或訊號FAULT2，且第三及閘的輸出端輸出訊號87R1或訊號87R2，其中當應用於第一區域(Zone 1)時，則該些第三輸入端的其中之一連接訊號FDIF1，該些第三輸入端的其中另一連接訊號87O1，該些第三輸入端的其中又一連接訊號FAULT1，第三及閘的輸出端輸出訊號87R1；當應用於第二區域(Zone 2)時，則該些第三輸入端的其中之一連接訊號FDIF2，該些第三輸入端的其中另一連接訊號87O2，該些第三輸入端的其中又一連接訊號FAULT2，第三及閘的輸出端輸出訊號87R2。選擇元件的輸出端輸出訊號的反向輸入該些第三輸入端的其中再一輸入端。In order to achieve the above object, according to the protection relay logic of a double busbar power system with a tie circuit breaker according to the present invention, the double busbar power system includes a first busbar, a second busbar, a tie circuit breaker, a first One electric device, one second electric device and one SEL-487B relay, the tie circuit breaker is connected between the first bus bar and the second bus bar, and the first electric device is connected to the first bus bar through a corresponding first circuit breaker. Bus bar, the second electrical equipment is connected to the second bus bar through a corresponding second circuit breaker, a signal 87Z1 output by the SEL-487B relay controls the connection circuit breaker and the first circuit breaker, and a signal 87Z1 output by the SEL-487B relay outputs The signal 87Z2 controls the tie circuit breaker and the second circuit breaker; the SEL-487B relay has the protection relay logic, and the protection relay logic includes a first AND gate, a second AND gate, a third AND gate and a selection element . The first AND gate has three first input terminals and a first output terminal, one of the first input terminals is connected to a signal PLT12, and the other of the first input terminals is connected to an inverted signal 87STCZ1, the Another one of the first input terminals is connected with a signal 87CZ1. The second AND gate has two second input terminals and a second output terminal, one of the second input terminals is connected to the first output terminal, and the other of the second input terminals is connected to a signal 87R1 or a signal 87R2, The second output terminal outputs signal 87Z1 or signal 87Z2, wherein when applied to a first zone (Zone 1), the other one of the second input terminals is connected to signal 87R1, and the second output terminal outputs signal 87Z1; when applied to In a second zone (Zone 2), another of the second input terminals is connected to a signal 87R2, and the second output terminal outputs a signal 87Z2. The third AND gate has four third input terminals and a third output terminal, one of these third input terminals is connected to a signal FDIF1 or signal FDIF2, and the other of these third input terminals is connected to a signal 87O1 or signal 87O2, another one of these third input terminals is connected to a signal FAULT1 or a signal FAULT2, and the output terminal of the third AND gate outputs a signal 87R1 or a signal 87R2, wherein when applied to the first zone (Zone 1), these One of the third input terminals is connected to the signal FDIF1, the other of the third input terminals is connected to the signal 87O1, another of the third input terminals is connected to the signal FAULT1, and the output terminal of the third AND gate outputs the signal 87R1; when applied In the second zone (Zone 2), one of the third input terminals is connected to the signal FDIF2, another of the third input terminals is connected to the signal 87O2, and another of the third input terminals is connected to the signal FAULT2, The output terminal of the third AND gate outputs a signal 87R2. The inverse of the output signal of the output terminal of the selection element is input to another input terminal of the third input terminals.

在一實施例中，該保護電驛邏輯更包括一判斷元件、一第一比較器及一第二比較器。當應用於第一區域(Zone 1)時，判斷元件的輸入端的其中之一連接一訊號IRT1，判斷元件的輸入端的其中另一連接一訊號IOP1，判斷元件的輸出端輸出訊號FDIF1；當應用於第二區域(Zone 2)時，判斷元件的輸入端的其中之一連接一訊號IRT2，判斷元件的輸入端的其中另一連接一訊號IOP2，判斷元件的輸出端輸出訊號FDIF2。當應用於第一區域(Zone 1)時，第一比較器的輸入端的其中之一連接訊號IOP1，第一比較器的輸入端的其中另一連接一訊號O87P，第一比較器的輸出端輸出訊號87O1；當應用於第二區域(Zone 2)時，第一比較器的輸入端的其中之一連接訊號IOP2，第一比較器的輸入端的其中另一連接訊號O87P，第一比較器的輸出端輸出訊號87O2。當應用於第一區域(Zone 1)時，第二比較器的輸入端的其中之一連接訊號IOP1，第二比較器的輸入端的其中另一連接一訊號S87P；當應用於第二區域(Zone 2)時，第二比較器的輸入端的其中之一連接訊號IOP2，第二比較器的輸入端的其中另一連接訊號S87P。In one embodiment, the protection relay logic further includes a judging element, a first comparator and a second comparator. When applied to the first zone (Zone 1), one of the input ends of the judging element is connected to a signal IRT1, the other of the input ends of the judging element is connected to a signal IOP1, and the output end of the judging element outputs a signal FDIF1; when applied to In the second zone (Zone 2), one of the input ends of the judging element is connected to a signal IRT2, the other of the input ends of the judging element is connected to a signal IOP2, and the output end of the judging element outputs a signal FDIF2. When applied to the first zone (Zone 1), one of the input terminals of the first comparator is connected to the signal IOP1, the other of the input terminals of the first comparator is connected to a signal O87P, and the output terminal of the first comparator outputs the signal 87O1; when applied to the second zone (Zone 2), one of the input terminals of the first comparator is connected to the signal IOP2, the other of the input terminals of the first comparator is connected to the signal O87P, and the output terminal of the first comparator is output Signal 87O2. When applied to the first zone (Zone 1), one of the input terminals of the second comparator is connected to the signal IOP1, and the other input terminal of the second comparator is connected to a signal S87P; when applied to the second zone (Zone 2 ), one of the input terminals of the second comparator is connected to the signal IOP2, and the other of the input terminals of the second comparator is connected to the signal S87P.

在一實施例中，該保護電驛邏輯更包括一延時動作元件，其輸入端連接第二比較器的輸出端；其中，選擇元件的輸入端的其中之一連接延時動作元件的輸出端，其輸入端的其中另一連接一接地端。In one embodiment, the protection relay logic further includes a delay action element, the input end of which is connected to the output end of the second comparator; wherein, one of the input ends of the selection element is connected to the output end of the delay action element, and its input The other end is connected to a ground end.

在一實施例中，選擇元件的輸出端與接地端直接連接。In one embodiment, the output terminal of the selection element is directly connected to the ground terminal.

為達到上述目的，依據本發明的一種雙匯流排電力系統，包括一第一匯流排及一第二匯流排、一連絡斷路器、一第一電力設備、一第二電力設備以及一SEL-487B電驛。連絡斷路器連接於第一匯流排與第二匯流排之間。第一電力設備透過對應的一第一斷路器連接於第一匯流排。第二電力設備透過對應的一第二斷路器連接於第二匯流排。SEL-487B電驛電性連接連絡斷路器、第一斷路器及第二斷路器，SEL-487B電驛輸出的一訊號87Z1控制連絡斷路器及第一斷路器，SEL-487B電驛輸出的一訊號87Z2控制連絡斷路器及第二斷路器。其中，SEL-487B電驛具有上述實施例的保護電驛邏輯。In order to achieve the above object, a dual-bus-bar power system according to the present invention includes a first bus-bar and a second bus-bar, a tie circuit breaker, a first electric device, a second electric device and a SEL-487B Electric post. The tie circuit breaker is connected between the first bus bar and the second bus bar. The first electrical equipment is connected to the first bus bar through a corresponding first circuit breaker. The second electrical equipment is connected to the second bus bar through a corresponding second circuit breaker. The SEL-487B relay electrically connects the tie circuit breaker, the first circuit breaker and the second circuit breaker, a signal 87Z1 output by the SEL-487B relay controls the tie circuit breaker and the first circuit breaker, and a signal output by the SEL-487B relay Signal 87Z2 controls the tie breaker and the second breaker. Among them, the SEL-487B relay has the protection relay logic of the above-mentioned embodiment.

承上所述，在本發明的具有連絡斷路器之雙匯流排電力系統的保護電驛邏輯及應用該保護電驛邏輯的雙匯流排電力系統中，藉由上述的邏輯規劃，可以改善現有版本SEL-487B電驛的保護邏輯的盲點，還使現有版本SEL-487B電驛的保護邏輯可以一致，進而可使具有連絡斷路器之雙匯流排電力系統可以提供穩定的供電。Based on the above, in the protection relay logic of the dual-bus-bar power system with a tie circuit breaker and the dual-bus-bar power system using the protection relay logic of the present invention, the existing version can be improved by the above-mentioned logic planning The blind spot of the protection logic of the SEL-487B relay also makes the protection logic of the existing version of the SEL-487B relay consistent, which in turn enables the dual busbar power system with tie circuit breakers to provide stable power supply.

以下將參照相關圖式，說明依本發明實施例的具有連絡斷路器之雙匯流排電力系統的保護電驛邏輯、及該雙匯流排電力系統，其中相同的元件將以相同的參照符號加以說明。The protection relay logic of the double-bus-bar power system with a tie circuit breaker and the double-bus-bar power system according to the embodiment of the present invention will be described below with reference to the relevant drawings, wherein the same components will be described with the same reference symbols .

本發明具有連絡斷路器之雙匯流排電力系統的保護電驛邏輯是應用於美國SEL公司製造的匯流排電流差動保護電驛（以下簡稱為SEL-487B電驛或87B）。熟知SEL-487B電驛的電力技術人員可以由該公司提供的技術手冊、資料、或其他相關的電力技術資料中得知，本文或圖式中所出現的訊號、代號或符號所代表的物理意義。此外，本文或圖式中出現的一些術語、符號、訊號或代號，熟知電力技術領域的技術人員應可理解其各自代表的意義。The protection relay logic of the dual bus-bar power system with a connection circuit breaker of the present invention is applied to the bus-bar current differential protection relay (hereinafter referred to as SEL-487B relay or 87B) manufactured by SEL Company of the United States. Electric power technicians who are familiar with SEL-487B electric relay can know from the technical manuals, materials, or other relevant electric power technical data provided by the company, the physical meanings represented by the signals, codes or symbols appearing in this article or drawings . In addition, some terms, symbols, signals or codes appearing in the text or drawings, those skilled in the field of electric power technology should be able to understand their respective meanings.

圖1A為本發明一實施例之具有連絡斷路器之雙匯流排電力系統的架構示意圖，而圖1B為SEL-487B電驛的功能方塊示意圖。在此，圖1A中顯示的87Z1、87Z2不是表示該設備或線路輸出訊號87Z1、87Z2，而是表示該設備或線路輸出的訊號和87Z1、87Z2的訊號相關（例如彼此對應）。另外，圖1B只繪示出一個SEL-487B電驛，熟知電力系統的技術人員應知道，三相系統可以具有三個SEL-487B電驛，以保護對應的三相電力設備。FIG. 1A is a schematic structural diagram of a dual-bus-bar power system with tie circuit breakers according to an embodiment of the present invention, and FIG. 1B is a functional block schematic diagram of a SEL-487B relay. Here, 87Z1 and 87Z2 shown in FIG. 1A do not represent the equipment or line output signals 87Z1 and 87Z2, but indicate that the equipment or line output signals are related to the signals of 87Z1 and 87Z2 (for example, correspond to each other). In addition, FIG. 1B only shows one SEL-487B relay. Those skilled in power systems should know that a three-phase system may have three SEL-487B relays to protect corresponding three-phase electrical equipment.

請參照圖1A及圖1B所示，雙匯流排電力系統1包括一第一匯流排#1 BUS、一第二匯流排#2 BUS、一連絡斷路器CB0、一第一電力設備、一第二電力設備以及一SEL-487B電驛（圖1B）。Please refer to FIG. 1A and FIG. 1B , the double busbar power system 1 includes a first busbar #1 BUS, a second busbar #2 BUS, a connection circuit breaker CB0, a first electric device, a second electrical equipment and a SEL-487B relay (Figure 1B).

連絡斷路器CB0連接於第一匯流排#1 BUS與第二匯流排#2 BUS之間。而第一電力設備可透過對應的一第一斷路器連接於第一匯流排#1 BUS，第二電力設備可透過對應的一第二斷路器連接於第二匯流排#2 BUS。其中，第一電力設備或第二電力設備可為一電源或一負載（負載可以是配電線路或其他的供電系統或供電網）。在一些實施例中，雙匯流排電力系統可以具有多個第一電力設備（對應多個第一斷路器）及多個第二電力設備（對應多個第二斷路器）。The tie breaker CB0 is connected between the first bus bar #1 BUS and the second bus bar #2 BUS. The first electrical device can be connected to the first bus #1 BUS through a corresponding first circuit breaker, and the second electrical device can be connected to the second bus #2 BUS through a corresponding second circuit breaker. Wherein, the first electric device or the second electric device may be a power source or a load (the load may be a distribution line or other power supply system or power supply network). In some embodiments, the double busbar power system may have multiple first power devices (corresponding to multiple first circuit breakers) and multiple second power devices (corresponding to multiple second circuit breakers).

如圖1A所示，本實施例是以具有兩個第一電力設備S1、L1對應兩個第一斷路器CB1、CB3，以及兩個第二電力設備S2、L2對應兩個第二斷路器CB2、CB4為例。其中，第一電力設備S1例如為發電機，其透過第一斷路器CB1連接於第一匯流排#1 BUS；第一電力設備L1例如為負載，其透過第一斷路器CB3連接於第一匯流排#1 BUS；第二電力設備S2例如為發電機，其透過第二斷路器CB2連接於第二匯流排#2 BUS，第二電力設備L2例如為負載，其透過第二斷路器CB4連接於第二匯流排#2 BUS。然並不此為限，在不同的實施例中，第一電力設備或第二電力設備可為其他的配電線路或配電網路，其數量可以大於或等於三個，視實際的供電網路而定。As shown in Figure 1A, this embodiment is based on having two first electric equipment S1, L1 corresponding to two first circuit breakers CB1, CB3, and two second electric equipment S2, L2 corresponding to two second circuit breakers CB2 , CB4 as an example. Wherein, the first electric device S1 is, for example, a generator, which is connected to the first bus #1 BUS through the first circuit breaker CB1; the first electric device L1 is, for example, a load, which is connected to the first bus through the first circuit breaker CB3 row #1 BUS; the second power equipment S2 is, for example, a generator, which is connected to the second bus bar #2 BUS through the second circuit breaker CB2, and the second power equipment L2 is, for example, a load, which is connected to the second bus bar through the second circuit breaker CB4 Second Bus #2 BUS. However, it is not limited thereto. In different embodiments, the first power equipment or the second power equipment may be other power distribution lines or power distribution lines, the number of which may be greater than or equal to three, depending on the actual power supply network Certainly.

本實施例的雙匯流排電力系統1還可包括四個隔離開關DS1～DS4，隔離開關DS1～DS4可為手動或自動隔離開關（即自動斷路器）。在此，隔離開關DS1～DS4是以自動斷路器為例。隔離開關DS1對應連接於第一斷路器CB1與第二匯流排#2 BUS之間，隔離開關DS2對應連接於第二斷路器CB2與第一匯流排#1 BUS之間；隔離開關DS3對應連接於第一斷路器CB3與第二匯流排#2 BUS之間，隔離開關DS4對應連接於第二斷路器CB4與第一匯流排#1 BUS之間。The dual-bus-bar power system 1 of this embodiment may further include four isolation switches DS1 - DS4 , and the isolation switches DS1 - DS4 may be manual or automatic isolation switches (ie, automatic circuit breakers). Here, the disconnectors DS1-DS4 are automatic circuit breakers as an example. The isolating switch DS1 is correspondingly connected between the first circuit breaker CB1 and the second bus bar #2 BUS, and the isolating switch DS2 is correspondingly connected between the second circuit breaker CB2 and the first bus bar #1 BUS; the isolating switch DS3 is correspondingly connected to Between the first circuit breaker CB3 and the second bus bar #2 BUS, the isolation switch DS4 is correspondingly connected between the second circuit breaker CB4 and the first bus bar #1 BUS.

此外，本實施例的雙匯流排電力系統1還可包括六個比流器CT0、CT0’、 CT1～CT4。比流器CT0可感測通過連絡斷路器CB0其中一側的電流（連絡斷路器CB0與第一匯流排#1 BUS之間），並輸出感測訊號SS至SEL-487B電驛（圖1B）；比流器CT0’可感測通過連絡斷路器CB0另一側的電流（連絡斷路器CB0與第二匯流排#2 BUS之間），並輸出感測訊號SS至SEL-487B電驛；比流器CT1～CT4可各別感測通過第一斷路器CB1、CB3及第二斷路器CB2、CB4的電流（CT1對應CB1、CT2對應CB2、CT3對應CB3、CT4對應CB4），並輸出對應的感測訊號SS至SEL-487B電驛。在此，感測訊號SS可使SEL-487B電驛輸出對應的訊號87Z1或訊號87Z2（圖1B）。In addition, the double-bus-bar power system 1 of this embodiment may also include six current comparators CT0, CT0', CT1-CT4. The current comparator CT0 can sense the current passing through one side of the tie circuit breaker CB0 (between the tie circuit breaker CB0 and the first bus bar #1 BUS), and output the sensing signal SS to the SEL-487B relay (Figure 1B) ; The current comparator CT0' can sense the current passing through the other side of the tie circuit breaker CB0 (between the tie circuit breaker CB0 and the second bus bar #2 BUS), and output the sensing signal SS to the SEL-487B relay; Current transformers CT1~CT4 can respectively sense the current passing through the first circuit breaker CB1, CB3 and the second circuit breaker CB2, CB4 (CT1 corresponds to CB1, CT2 corresponds to CB2, CT3 corresponds to CB3, CT4 corresponds to CB4), and outputs the corresponding Sensing signal SS to SEL-487B relay. Here, the sensing signal SS can make the SEL-487B relay output the corresponding signal 87Z1 or signal 87Z2 ( FIG. 1B ).

SEL-487B電驛分別電性連接連絡斷路器CB0、第一斷路器CB1、CB3及第二斷路器CB2、CB4（未繪示）。其中，SEL-487B電驛輸出的訊號87Z1可控制連絡斷路器CB0及第一斷路器CB1、CB3；SEL-487B電驛輸出的訊號87Z2可控制連絡斷路器CB0及第二斷路器CB2、CB4。在此，「控制」斷路器是指，當訊號例如為1時，可控制斷路器的開關切離（斷開，隔離故障），電流無法通過斷路器；反之，當訊號例如為0時，則無法控制斷路器的開關切離（斷開），電流可以通過斷路器。SEL-487B電驛具有一保護電驛邏輯，用以判斷輸出的訊號87Z1或87Z2是否為1。具體來說，訊號87Z1為1時，與第一匯流排#1 BUS連接的設備皆透過斷路器與第一匯流排#1 BUS隔離；而訊號87Z2為1時，與第二匯流排#2 BUS連接的設備皆透過斷路器與第二匯流排#2 BUS隔離，藉此隔離故障。The SEL-487B relay is respectively electrically connected to the tie circuit breaker CB0, the first circuit breakers CB1, CB3 and the second circuit breakers CB2, CB4 (not shown). Among them, the signal 87Z1 output by the SEL-487B relay can control the tie circuit breaker CB0 and the first circuit breaker CB1, CB3; the signal 87Z2 output by the SEL-487B relay can control the tie circuit breaker CB0 and the second circuit breaker CB2, CB4. Here, "controlling" the circuit breaker means that when the signal is 1, for example, the switch that can control the circuit breaker is cut off (open, isolate the fault), and the current cannot pass through the circuit breaker; conversely, when the signal is 0, for example, then The switch that cannot control the circuit breaker is disconnected (opened), and the current can pass through the circuit breaker. The SEL-487B relay has a protection relay logic to judge whether the output signal 87Z1 or 87Z2 is 1. Specifically, when the signal 87Z1 is 1, the equipment connected to the first bus #1 BUS is isolated from the first bus #1 BUS through the circuit breaker; and when the signal 87Z2 is 1, it is connected to the second bus #2 BUS The connected equipment is isolated from the second busbar #2 BUS through the circuit breaker, so as to isolate the fault.

依據參數的不同，目前台電的161kV系統中使用的SEL-487B電驛主要可區分為新、舊兩種版本。以下先分別針對新、舊兩種版本改善前的保護電驛邏輯規劃可能發生的問題作探討，之後，再說明改善後的保護電驛邏輯（本發明的保護電驛邏輯即為改善後的保護電驛邏輯）。According to different parameters, the SEL-487B relay used in Taipower's 161kV system can be divided into two types: new and old. In the following, the problems that may occur in the protection relay logic planning before the improvement of the new and old versions are discussed respectively, and then the improved protection relay logic is explained (the protection relay logic of the present invention is the improved protection relay logic). relay logic).

因雙匯流排電力系統1的第一區域(Zone 1)與第二區域(Zone 2)的保護電驛邏輯規劃一致，故以下僅以第一區域(Zone 1)的邏輯為例來進行說明。可理解的是，第一區域(Zone 1)、第二區域(Zone 2)分別與SEL-487B電驛電連接，且對應於訊號87Z1、87Z2的控制區域（設備）。若第一區域(Zone 1)發生故障時，則SEL-487B電驛發出訊號87Z1（例如為1）將使對應的Zone 1的斷路器跳脫，藉此隔離該故障；若第二區域(Zone 2)發生故障時，則SEL-487B電驛發出訊號87Z2（例如為1）將使對應的Zone 2的斷路器跳脫，藉此隔離該故障。第一區域(Zone 1)、第二區域(Zone 2)為圖1A之雙匯流排電力系統1的特定用語，熟知本領域的技術人員當可理解其意義。Because the protection relay logic planning of the first zone (Zone 1) and the second zone (Zone 2) of the dual-bus-bar power system 1 are consistent, the following only uses the logic of the first zone (Zone 1) as an example for illustration. It can be understood that the first zone (Zone 1) and the second zone (Zone 2) are respectively connected to the SEL-487B relay and correspond to the control zones (equipment) of the signals 87Z1 and 87Z2. If a fault occurs in the first zone (Zone 1), the SEL-487B relay sends out a signal 87Z1 (for example, 1) to trip the circuit breaker of the corresponding Zone 1, thereby isolating the fault; if the second zone (Zone 2) When a fault occurs, the SEL-487B relay sends out a signal 87Z2 (for example, 1) to trip the corresponding Zone 2 circuit breaker, thereby isolating the fault. The first zone (Zone 1) and the second zone (Zone 2) are specific terms for the dual-bus-bar power system 1 in FIG. 1A , and those skilled in the art should understand their meanings.

圖2為圖1A的雙匯流排電力系統中，舊版SEL-487B電驛的第一區域的邏輯規劃示意圖。FIG. 2 is a schematic diagram of the logical planning of the first area of the old version of the SEL-487B relay in the dual-bus-bar power system of FIG. 1A.

舊版SEL-487B電驛的Zone 1部分邏輯規劃請參照圖2及以下式(1)至式(3)所示。在圖2中，訊號IOP1為流進與流出Zone 1保護區間之電流和的絕對值，訊號IRT1則為流進與流出Zone 1保護區間之電流值的絕對值和；訊號87Z1則為Zone 1的監視訊號（控制訊號），是否動作取決於訊號87R1及訊號Z1S是否同時皆為1的狀態。而訊號87R1則是由訊號FDIF1、訊號87O1 及訊號FAULT1來決定。其中，訊號FDIF1 為判斷工作點是否位於動作區內，即IOP1＞IRT1×SLP1（若判斷可能為外部故障時，則SLP1會切換為SLP2）；訊號87O1為判斷訊號IOP1的動作量是否大於所設定的訊號O87P；訊號FAULT1為判斷是否為內部故障。訊號Z1S則是由訊號PLT12及訊號PCT06Q所決定，其中，訊號PLT12為現場US/LK開關是否使用（即安全鎖定開關，有使用時為1）；訊號PCT06Q為該電驛的Zone 3元件是否動作（即Zone 1加Zone 2視成一個節點，其工作點若在工作區則會動作）。Please refer to Figure 2 and the following formulas (1) to (3) for the logic planning of the Zone 1 part of the old version of the SEL-487B relay. In Figure 2, the signal IOP1 is the absolute value of the sum of the currents flowing into and out of the Zone 1 protection zone, and the signal IRT1 is the absolute value of the current value flowing into and out of the Zone 1 protection zone; the signal 87Z1 is the sum of the Zone 1 Whether the monitoring signal (control signal) operates depends on whether the signal 87R1 and the signal Z1S are both 1 at the same time. The signal 87R1 is determined by the signal FDIF1, the signal 87O1 and the signal FAULT1. Among them, the signal FDIF1 is used to judge whether the operating point is in the action area, that is, IOP1>IRT1×SLP1 (if it is judged that it may be an external fault, then SLP1 will switch to SLP2); the signal 87O1 is used to judge whether the operation amount of the signal IOP1 is greater than the set value The signal O87P; the signal FAULT1 is used to judge whether it is an internal fault. The signal Z1S is determined by the signal PLT12 and the signal PCT06Q, among which, the signal PLT12 is whether the on-site US/LK switch is used (that is, the safety lock switch, which is 1 when it is used); the signal PCT06Q is whether the Zone 3 component of the relay is activated (That is, Zone 1 plus Zone 2 is regarded as a node, and its working point will act if it is in the working area).

此外，由圖2及式(2)可觀察到，在舊版邏輯規劃中，E87SSUP=N，即當發生CT Failure時則不閉鎖該電驛的87B保護功能。 87𝑍1 = 87R1 × Z1S (1) 87𝑅1 = FDIF1 × 87O1 × FAULT1 (2) 𝑍1𝑆 = 𝑃𝐿𝑇12 × PCT06Q (3) In addition, it can be observed from Figure 2 and Equation (2) that in the old version of logic planning, E87SSUP=N, that is, when a CT Failure occurs, the 87B protection function of the relay will not be blocked. 87𝑍1 = 87R1 × Z1S (1) 87𝑅1 = FDIF1 × 87O1 × FAULT1 (2) 𝑍1𝑆 = 𝑃𝐿𝑇12 × PCT06Q (3)

圖3為圖1A的雙匯流排電力系統中，新版SEL-487B電驛的第一區域的邏輯規劃示意圖。Fig. 3 is a schematic diagram of the logical planning of the first area of the new SEL-487B relay in the dual-bus-bar power system of Fig. 1A.

新版SEL-487B電驛的Zone 1部分邏輯規劃請參照圖3所示，相較於舊版邏輯而言，新版的訊號87R1及訊號Z1S變更如下： 87𝑅1 = FDIF1 × 87O1 × FAULT1 × 87ST1的反向訊號 (4) 𝑍1𝑆 = PLT12 ×OCTZ1的反向訊號 × 87CZ1 (5) Please refer to Figure 3 for the logic planning of the Zone 1 part of the new version of the SEL-487B relay. Compared with the logic of the old version, the changes of the signal 87R1 and signal Z1S of the new version are as follows: 87𝑅1 = reverse signal of FDIF1 × 87O1 × FAULT1 × 87ST1 (4) 𝑍1𝑆 = PLT12 × reverse signal of OCTZ1 × 87CZ1 (5)

由圖3中可得知，E87SSUP=Y，即藉由訊號IOP1的動作量是否大於訊號S87P來判斷是否有發生CT Failure。另外，在訊號Z1S的部分，訊號87CZ1及訊號OCTZ1為在新版SEL-487B電驛中才有的訊號（或元件）。其中，訊號87CZ1為判斷Check Zone是否動作，而訊號OCTZ1則是另外一種判斷是否發生 CT Failure 的元件，其邏輯可如圖4所示。It can be seen from FIG. 3 that E87SSUP=Y, that is, it is judged whether there is a CT Failure by whether the action amount of the signal IOP1 is greater than the signal S87P. In addition, in the part of the signal Z1S, the signal 87CZ1 and the signal OCTZ1 are signals (or components) that are only available in the new version of the SEL-487B relay. Among them, the signal 87CZ1 is used to judge whether the Check Zone is activated, and the signal OCTZ1 is another component used to judge whether a CT Failure occurs, and its logic can be shown in Figure 4.

在圖4中，訊號OCTZ1的動作需滿足以下4個條件： ∆𝐼𝑂𝑃1𝑅 ＞ 0.05 (6) ∆𝐼𝑂𝑇1𝑅 ＜ −0.05 (7) ∆𝐼𝑂𝑃1𝑅 + ∆𝐼𝑂𝑇1𝑅 ＜ 0.05 (8) 𝐼𝑂𝑃1 ＞ 𝑆87𝑃（設定為0.1） (9) In Figure 4, the action of the signal OCTZ1 needs to meet the following four conditions: ∆𝐼𝑂𝑃1𝑅 ＞ 0.05 ∆𝐼𝑂𝑇1𝑅 ＜ −0.05 ∆𝐼𝑂𝑃1𝑅 + ∆𝐼𝑂𝑇1𝑅 < 0.05 (8) 𝐼𝑂𝑃1 > 𝑆87𝑃 (set to 0.1) (9)

訊號OCTZ1的重置條件如下，其一條件達成即可重置： 𝐼𝑂𝑃1 ＜ 0.9 × 𝑆87𝑃 (10) 𝐼𝑂𝑃1 ＜ 0.05 (11) The reset conditions of the signal OCTZ1 are as follows, and it can be reset when one of the conditions is met: 𝐼𝑂𝑃1 ＜ 0.9 × 𝑆87𝑃 (10) 𝐼𝑂𝑃1 ＜ 0.05

另外，圖5為圖1A的雙匯流排電力系統1中，未發生比流器異常時的示意圖（圖5中顯示的電流I1～I6為用於計算的模擬值，非實際值）。以圖5為例，當正常運轉未發生CT Failure時，則Zone 1的訊號IOP1的動作量及訊號IRT1的抑制量分別為： 𝐼𝑂𝑃1 = |

| = 0 (12) 𝐼𝑅𝐸1 =

= 2 (13) In addition, FIG. 5 is a schematic diagram of the dual-bus-bar power system 1 in FIG. 1A when no abnormality occurs in the current comparator (the currents I1-I6 shown in FIG. 5 are simulated values for calculation, not actual values). Taking Figure 5 as an example, when CT Failure does not occur during normal operation, the action amount of the signal IOP1 and the suppression amount of the signal IRT1 in Zone 1 are respectively: 𝐼𝑂𝑃1 = |

| = 0 (12) 𝐼𝑅𝐸1 =

= 2 (13)

另外，圖6為圖1A的雙匯流排電力系統1中，發生比流器異常時的示意圖。以圖6 為例，若電流I1發生CT Failure(CT OPEN)時，則Zone 1的訊號IOP1的動作量及訊號IRT1的抑制量分別為： 𝐼𝑂𝑃1 = |

| = 1 (14) 𝐼𝑅𝐸1 =

= 1 (15) In addition, FIG. 6 is a schematic diagram of the double-bus-bar power system 1 in FIG. 1A when the current comparator is abnormal. Taking Figure 6 as an example, if CT Failure (CT OPEN) occurs on the current I1, the action amount of the signal IOP1 and the suppression amount of the signal IRT1 in Zone 1 are respectively: 𝐼𝑂𝑃1 = |

| = 1 (14) 𝐼𝑅𝐸1 =

= 1 (15)

由式(12)至式(15)可計算出動作量及抑制量的變化量如下： ∆𝐼𝑂𝑃1𝑅 = 1 − 0 = 1 (16) ∆𝐼𝑅𝐸1 = 1 − 2 = −1 (17) From formula (12) to formula (15), the change of action amount and inhibition amount can be calculated as follows: ∆𝐼𝑂𝑃1𝑅 = 1 − 0 = 1 (16) ∆𝐼𝑅𝐸1 = 1 − 2 = −1 (17)

將上述結果套用至式(6)至式(9)的條件，可得式(18)至式(21)，其滿足訊號OCTZ1動作條件進而閉鎖87B的保護功能。 ∆𝐼𝑂𝑃1𝑅 = 1 ＞ 0.05 (18) ∆𝐼𝑂𝑇1𝑅 = −1 ＜ −0.05 (19) ∆𝐼𝑂𝑃1𝑅 + ∆𝐼𝑂𝑇1𝑅 = 1 − 1 = 0 ＜ 0.05 (20) 𝐼𝑂𝑃1 = 1 ＞ 𝑆87𝑃 = 0.1 (21) Applying the above results to the conditions of Equation (6) to Equation (9), Equation (18) to Equation (21) can be obtained, which satisfy the action condition of the signal OCTZ1 and thus block the protection function of 87B. ∆𝐼𝑂𝑃1𝑅 = 1 ＞ 0.05 (18) ∆𝐼𝑂𝑇1𝑅 = −1 ＜ −0.05 ∆𝐼𝑂𝑃1𝑅 + ∆𝐼𝑂𝑇1𝑅 = 1 − 1 = 0 < 0.05 (20) 𝐼𝑂𝑃1 = 1 > 𝑆87𝑃 = 0.1 (21)

若之後CT Failure的情況解除，動作量及抑制量則會由式(14)及式(15)的計算值回復至式(12)及式(13)的計算值，滿足重置訊號OCTZ1條件，如式(22)及式(23)所示。 𝐼𝑂𝑃1 = 0 ＜ 0.9 × 𝑆87𝑃 = 0.09 (22) 𝐼𝑂𝑃1 = 0 ＜ 0.05 (23) If the condition of CT Failure is removed afterwards, the action amount and inhibition amount will return from the calculated values of formula (14) and formula (15) to the calculated values of formula (12) and formula (13), satisfying the condition of reset signal OCTZ1, As shown in formula (22) and formula (23). 𝐼𝑂𝑃1 = 0 < 0.9 × 𝑆87𝑃 = 0.09 (22) 𝐼𝑂𝑃1 = 0 ＜ 0.05

以下分別針對(一)、正常運轉下發生CT Failure；(二)、Zone 2 CT Failure後發生外部故障；(三)、第二匯流排#2 BUS停用後發生第一匯流排#1 BUS故障等，進行新、舊版SEL-487B電驛的邏輯弱點分析。The following are respectively for (1), CT Failure occurs under normal operation; (2), external failure occurs after Zone 2 CT Failure; (3), first bus #1 BUS failure occurs after the second bus #2 BUS is disabled etc., to analyze the logical weaknesses of the new and old SEL-487B relays.

(一)、正常運轉下發生CT Failure：(1) CT Failure occurs under normal operation:

由圖2及圖3可得知，新版的SEL-487B電驛因訊號87Z1是否動作與訊號OCTZ1及訊號87ST1有關，當發生CT Failure時，訊號OCTZ1會動作而閉鎖87Z1。同時，若訊號IOP1大於訊號S87P的設定值，經過所設定的時間(87STPU)後，則訊號87ST1亦會成立而閉鎖87Z1。反觀舊版的SEL-487B電驛邏輯，除了無訊號OCTZ1參數，因E87SSUP設定為N，導致訊號87Z1與87ST1無關，故當發生 CT Failure時，保護功能不會被閉鎖。It can be seen from Figure 2 and Figure 3 that the new version of the SEL-487B relay depends on whether the signal 87Z1 operates or not is related to the signal OCTZ1 and the signal 87ST1. When CT Failure occurs, the signal OCTZ1 will activate and block 87Z1. At the same time, if the signal IOP1 is greater than the set value of the signal S87P, after the set time (87STPU), the signal 87ST1 will also be established and the 87Z1 will be blocked. In contrast to the old version of the SEL-487B relay logic, except for the no-signal OCTZ1 parameter, because E87SSUP is set to N, the signal 87Z1 has nothing to do with 87ST1, so when CT Failure occurs, the protection function will not be blocked.

(二) 、Zone 2 CT Failure後發生外部故障：(2) External failure occurs after Zone 2 CT Failure:

圖7為圖1A的雙匯流排電力系統1中，發生比流器異常後再發生外部故障時的電路示意圖。如圖7所示，其為CT Failure後發生外部故障的情形。由圖中的電流值可得到： 𝐼𝑂𝑃1 = |

| = 4 (24) 𝐼𝑅𝐸1 =

= 4 (25) 𝐼𝑂𝑃1 ＞ 𝑆𝐿𝑃2 × 𝐼𝑅𝐸1 = 0.8 × 4 = 3.2 (26) FIG. 7 is a schematic diagram of the circuit when an external fault occurs after the current comparator is abnormal in the double-bus-bar power system 1 of FIG. 1A . As shown in FIG. 7 , it is a case where an external fault occurs after a CT Failure. From the current value in the figure, we can get: 𝐼𝑂𝑃1 = |

| = 4 (24) 𝐼𝑅𝐸1 =

= 4 (25) 𝐼𝑂𝑃1 > 𝑆𝐿𝑃2 × 𝐼𝑅𝐸1 = 0.8 × 4 = 3.2 (26)

請再參照圖3所式，新版SEL-487B電驛於此情況下，因87B1保護功能會因訊號OCTZ1以及訊號87ST1的成立而被閉鎖。然而，舊版SEL-487B電驛因E87SSUP設定為N，訊號87ST1雖成立但無法閉鎖訊號87Z1，又舊版沒有訊號OCTZ1，導致於CT Failure的情況下發生外部故障時，87B Zone 2會動作，如圖2及式(26)所示。Please refer to Figure 3 again. In this case, the new version of SEL-487B relay will be blocked due to the establishment of the signal OCTZ1 and the signal 87ST1 because of the 87B1 protection function. However, because E87SSUP is set to N in the old version of SEL-487B, although the signal 87ST1 is established, the signal 87Z1 cannot be blocked, and the old version does not have the signal OCTZ1. As a result, when an external failure occurs in the case of CT Failure, 87B Zone 2 will operate. As shown in Figure 2 and formula (26).

(三)、第二匯流排#2 BUS停用後發生第一匯流排#1 BUS故障：(3) The first bus #1 BUS fault occurs after the second bus #2 BUS is disabled:

圖8為圖1A的雙匯流排電力系統1中，正常運轉時的電路示意圖。一般正常運轉情況如圖8所示，其動作量及抑制量如下： 𝐼𝑂𝑃1 _{𝑛𝑜𝑟𝑚𝑎𝑙}= |

| = 0 (27) 𝐼𝑅𝐸1 _{𝑛𝑜𝑟𝑚𝑎𝑙}=

= 1.6 (28) 𝐼𝑂𝑃2 _{𝑛𝑜𝑟𝑚𝑎𝑙}= |

| = 0 (29) 𝐼𝑅𝐸2 _{𝑛𝑜𝑟𝑚𝑎𝑙}=

= 1.6 (30) FIG. 8 is a schematic diagram of the circuit in normal operation of the dual-bus-bar power system 1 in FIG. 1A . The general normal operation situation is shown in Figure 8, and its action amount and inhibition amount are as follows: 𝐼𝑂𝑃1 _{𝑛𝑜𝑟𝑚𝑎𝑙} = |

| = 0 (27) 𝐼𝑅𝐸1 _{𝑛𝑜𝑟𝑚𝑎𝑙} =

= 1.6 (28) 𝐼𝑂𝑃2 _{𝑛𝑜𝑟𝑚𝑎𝑙} = |

| = 0 (29) 𝐼𝑅𝐸2 _{𝑛𝑜𝑟𝑚𝑎𝑙} =

= 1.6 (30)

圖9為圖1A的雙匯流排電力系統1中，第二匯流排停用時的電路示意圖。若第二匯流排#2 BUS需停電檢修等工程，將其電源及負載都改掛至第一匯流排#1 BUS上運轉，如圖9所示，此時有可能會有差電流的產生，其IOP1及IRT1如式(31)至式(34)所示，並由式(35)及式(36)可知於此情況下並不會造成87B1及87B2動作。 𝐼𝑂𝑃1 _#2 _𝐵𝑈𝑆 _{𝑆𝑇𝑂𝑃}= |

| = 0.2 (31) 𝐼𝑅𝐸1 _#2 _𝐵𝑈𝑆 _{𝑆𝑇𝑂𝑃}=

= 1.4 (32) 𝐼𝑂𝑃2 _#2 _𝐵𝑈𝑆 _{𝑆𝑇𝑂𝑃}= |

| = 0.2 (33) 𝐼𝑅𝐸2 _#2 _𝐵𝑈𝑆 _{𝑆𝑇𝑂𝑃}=

= 1.4 (34) 𝐼𝑂𝑃1 ＜ 𝑆𝐿𝑃1 × 𝐼𝑅𝐸1 = 0.6 × 1.4 = 0.84 (35) 𝐼𝑂𝑃2 ＜ 𝑆𝐿𝑃1 × 𝐼𝑅𝐸2 = 0.6 × 1.4 = 0.84 (36) FIG. 9 is a schematic circuit diagram when the second bus bar is disabled in the double bus bar power system 1 of FIG. 1A . If the second busbar #2 BUS needs power outage maintenance and other projects, change its power supply and load to the first busbar #1 BUS for operation, as shown in Figure 9, there may be a differential current at this time, Its IOP1 and IRT1 are as shown in formula (31) to formula (34), and can know from formula (35) and formula (36) and can not cause 87B1 and 87B2 action under this situation. 𝐼𝑂𝑃1 _#2 _𝐵𝑈𝑆 _{𝑆𝑇𝑂𝑃} = |

| = 0.2 (31) 𝐼𝑅𝐸1 _#2 _𝐵𝑈𝑆 _{𝑆𝑇𝑂𝑃} =

= 1.4 (32) 𝐼𝑂𝑃2 _#2 _𝐵𝑈𝑆 _{𝑆𝑇𝑂𝑃} = |

| = 0.2 (33) 𝐼𝑅𝐸2 _#2 _𝐵𝑈𝑆 _{𝑆𝑇𝑂𝑃} =

= 1.4 (34) 𝐼𝑂𝑃1 < 𝑆𝐿𝑃1 × 𝐼𝑅𝐸1 = 0.6 × 1.4 = 0.84 (35) 𝐼𝑂𝑃2 < 𝑆𝐿𝑃1 × 𝐼𝑅𝐸2 × 1.4 = 0.4 (

圖10為圖1A的雙匯流排電力系統1中，第二匯流排停用時發生第一匯流排故障的電路示意圖。若於第二匯流排#2 BUS停用下發生第一匯流排#1 BUS故障，其電流的示意圖如圖10所示。由式(37)至式(42)可知，舊版SEL-487B電驛於此情況下 87B1及87B2皆會動作以隔離故障；新版SEL-487B電驛則是因為第二匯流排#2 BUS停用過程與停用後，OCTZ1、OCTZ2、87ST1或87ST2成立而閉鎖 87B1及87B2的功能。 𝐼𝑂𝑃1 _#2 _𝐵𝑈𝑆 _{𝑆𝑇𝑂𝑃}= |

| = 3.4 (37) 𝐼𝑅𝐸1 _#2 _𝐵𝑈𝑆 _{𝑆𝑇𝑂𝑃}=

= 4.6 (38) 𝐼𝑂𝑃2 _#2 _𝐵𝑈𝑆 _{𝑆𝑇𝑂𝑃}= |

| = 3.2 (39) 𝐼𝑅𝐸2 _#2 _𝐵𝑈𝑆 _{𝑆𝑇𝑂𝑃}=

= 4.8 (40) 𝐼𝑂𝑃1 ＞ 𝑆𝐿𝑃1 × 𝐼𝑅𝐸1 = 0.6 × 4.6 = 2.76 (41) 𝐼𝑂𝑃2 ＞ 𝑆𝐿𝑃1 × 𝐼𝑅𝐸2 = 0.6 × 4.8 = 2.88 (42) FIG. 10 is a schematic circuit diagram of a first bus-bar fault occurring when the second bus-bar is disabled in the dual-bus-bar power system 1 of FIG. 1A . If the first bus #1 BUS fault occurs when the second bus #2 BUS is disabled, the schematic diagram of the current flow is shown in FIG. 10 . From formula (37) to formula (42), it can be seen that the old version of SEL-487B relay 87B1 and 87B2 will operate to isolate the fault in this case; the new version of SEL-487B relay is because the second bus #2 BUS stops After the process of using and deactivating, OCTZ1, OCTZ2, 87ST1 or 87ST2 are established to block the functions of 87B1 and 87B2. 𝐼𝑂𝑃1 _#2 _𝐵𝑈𝑆 _{𝑆𝑇𝑂𝑃} = |

| = 3.4 (37) 𝐼𝑅𝐸1 _#2 _𝐵𝑈𝑆 _{𝑆𝑇𝑂𝑃} =

= 4.6 (38) 𝐼𝑂𝑃2 _#2 _𝐵𝑈𝑆 _{𝑆𝑇𝑂𝑃} = |

| = 3.2 (39) 𝐼𝑅𝐸2 _#2 _𝐵𝑈𝑆 _{𝑆𝑇𝑂𝑃} =

= 4.8 (40) 𝐼𝑂𝑃1 > 𝑆𝐿𝑃1 × 𝐼𝑅𝐸1 = 0.6 × 4.6 = 2.76 (41) 𝐼𝑂𝑃2 > 𝑆𝐿𝑃1 × 𝐼𝑅𝐸2 × 4.8 = 0.8 (

由上述可知，新、舊版SEL-487B電驛的保護邏輯需解決的弱點如下：舊版SEL-487B電驛於CT Failure條件下發生外部故障而造成87B電驛多動作；新版SEL-487B電驛在單一匯流排停用過程或停用後，87B1及87B2功能會被閉鎖，無法正確動作。From the above, we can see that the protection logic of the new and old versions of the SEL-487B relay needs to address the following weaknesses: the old version of the SEL-487B relay has an external fault under the condition of CT Failure, which causes the 87B relay to perform multiple actions; the new version of the SEL-487B relay During or after the deactivation of a single bus, the functions of 87B1 and 87B2 will be blocked and cannot operate correctly.

因此，本發明提出以下新、舊版SEL-487B電驛的邏輯規劃，藉此改善新、舊版SEL-487B電驛的上述弱點，同時使新、舊版SEL-487B電驛的邏輯可以一致。Therefore, the present invention proposes the following logical planning of the new and old versions of the SEL-487B relay, thereby improving the above-mentioned weaknesses of the new and old versions of the SEL-487B relay, and at the same time making the logic of the new and old versions of the SEL-487B relay consistent .

圖11為本發明一實施例之改善後舊版SEL-487B電驛的Zone 1的保護電驛邏輯示意圖。如圖11所示，改善後舊版SEL-487B電驛的保護電驛邏輯Lo包括一第一及閘11以及一第二及閘12。另外，本實施例的保護電驛邏輯Lo更可包括一第三及閘13、一選擇元件14、一判斷元件15、一第一比較器16、一第二比較器17及一延時動作元件18。FIG. 11 is a logical schematic diagram of the protection relay of Zone 1 of the old SEL-487B relay after improvement according to an embodiment of the present invention. As shown in FIG. 11 , the protection relay logic Lo of the improved old version SEL-487B relay includes a first AND gate 11 and a second AND gate 12 . In addition, the protection relay logic Lo of this embodiment may further include a third AND gate 13, a selection element 14, a judgment element 15, a first comparator 16, a second comparator 17 and a delay action element 18 .

第一及閘11具有三個第一輸入端及一第一輸出端，該些第一輸入端的其中之一連接訊號PLT12，該些第一輸入端的其中另一連接訊號PCT06Q，該些第一輸入端的其中又一連接反向的訊號87ST3（即訊號87ST3的反向訊號）。The first AND gate 11 has three first input terminals and a first output terminal, one of the first input terminals is connected to the signal PLT12, the other of the first input terminals is connected to the signal PCT06Q, and the first input terminals are connected to the signal PCT06Q. Another one of the terminals is connected to the reverse signal 87ST3 (that is, the reverse signal of the signal 87ST3).

第二及閘12具有二個第二輸入端及一第二輸出端，該些第二輸入端的其中之一連接第一及閘11的第一輸出端，該些第二輸入端的其中另一連接訊號87R1（本實施例為應用於Zone 1，故為訊號87R1；當應用在Zone 2時，則為訊號87R2），且第二輸出端輸出訊號87Z1（本實施例為應用於Zone 1，故為訊號87Z1；當應用在Zone 2時，則為訊號87Z2）。The second AND gate 12 has two second input terminals and a second output terminal, one of the second input terminals is connected to the first output terminal of the first AND gate 11, and the other of the second input terminals is connected to Signal 87R1 (this embodiment is applied to Zone 1, so it is signal 87R1; when applied to Zone 2, it is signal 87R2), and the second output terminal outputs signal 87Z1 (this embodiment is applied to Zone 1, so it is Signal 87Z1; when used in Zone 2, it is signal 87Z2).

第三及閘13具有四個第三輸入端及一第三輸出端，該些第三輸入端的其中之一連接判斷元件15的輸出端，該些第三輸入端的其中另一連接第一比較器16的輸出端，該些第三輸入端的其中又一連接訊號FAULT1（本實施例為應用於Zone 1，故為訊號FAULT1；當應用在Zone 2時，則為訊號FAULT2），而選擇元件14的輸出端的輸出訊號的反向訊號輸入第三及閘13的該些第三輸入端的其中再一輸入端（即第三輸入端中的第四個），且第三及閘13的輸出端輸出訊號87R1（本實施例為應用於Zone 1，故為訊號87R1；當應用在Zone 2時，則為訊號87R2）。The third AND gate 13 has four third input terminals and a third output terminal, one of the third input terminals is connected to the output terminal of the judgment element 15, and the other of the third input terminals is connected to the first comparator 16, another of the third input terminals is connected to the signal FAULT1 (this embodiment is applied to Zone 1, so it is the signal FAULT1; when it is applied to Zone 2, it is the signal FAULT2), and the selection element 14 The reverse signal of the output signal of the output terminal is input to another input terminal (ie, the fourth one of the third input terminals) of the third input terminals of the third sum gate 13, and the output terminal of the third sum gate 13 outputs the signal 87R1 (this embodiment is applied to Zone 1, so the signal is 87R1; when it is applied to Zone 2, it is the signal 87R2).

判斷元件15的輸入端的其中之一連接訊號IRT1（本實施例為應用於Zone 1，故為訊號IRT1；當應用在Zone 2時，則為訊號IRT2），判斷元件15的輸入端的其中另一連接訊號IOP1（本實施例為應用於Zone 1，故為訊號IOP1；當應用在Zone 2時，則為訊號IOP2）。One of the input ends of the judging element 15 is connected to the signal IRT1 (this embodiment is applied to Zone 1, so it is the signal IRT1; when applied to Zone 2, it is the signal IRT2), and the other of the input ends of the judging element 15 is connected to Signal IOP1 (this embodiment is applied to Zone 1, so it is signal IOP1; when applied to Zone 2, it is signal IOP2).

第一比較器16的輸入端的其中之一連接訊號IOP1（本實施例為應用於Zone 1，故為訊號IOP1；當應用在Zone 2時，則為訊號IOP2），第一比較器16的輸入端的其中另一連接訊號O87P，第一比較器16輸出的訊號輸入第三及閘13。第二比較器17的輸入端的其中之一連接訊號IOP1（本實施例為應用於Zone 1，故為訊號IOP1；當應用在Zone 2時，則為訊號IOP2），其輸入端的其中另一連接訊號S87P，第二比較器17的輸出端輸出訊號87S1（本實施例為應用於Zone 1，故為訊號87S1；當應用在Zone 2時，則為訊號87S2）。One of the input terminals of the first comparator 16 is connected to the signal IOP1 (this embodiment is applied to Zone 1, so it is the signal IOP1; when applied to Zone 2, it is the signal IOP2), the input terminal of the first comparator 16 The other connection signal O87P, the signal output by the first comparator 16 is input into the third AND gate 13 . One of the input terminals of the second comparator 17 is connected to the signal IOP1 (this embodiment is applied to Zone 1, so it is the signal IOP1; when applied to Zone 2, it is the signal IOP2), and the other of its input terminals is connected to the signal S87P, the output terminal of the second comparator 17 outputs a signal 87S1 (this embodiment is applied to Zone 1, so it is the signal 87S1; when it is applied to Zone 2, it is the signal 87S2).

延時動作元件18的輸入端連接第二比較器17的輸出端，而選擇元件14的輸入端的其中之一連接延時動作元件18的輸出端，且選擇元件14的輸入端的其中另一連接一接地端(N)。The input end of the delay action element 18 is connected to the output end of the second comparator 17, and one of the input ends of the selection element 14 is connected to the output end of the delay action element 18, and the other of the input ends of the selection element 14 is connected to a ground terminal (N).

另外，圖12為本發明一實施例之改善後新版SEL-487B電驛的Zone 1的保護電驛邏輯示意圖。如圖12所示，改善後新版SEL-487B電驛的保護電驛邏輯Ln包括一第一及閘11、一第二及閘12、一第三及閘13、一選擇元件14。另外，本實施例的保護電驛邏輯Ln更可包括一判斷元件15、一第一比較器16、一第二比較器17及一延時動作元件18。In addition, FIG. 12 is a logical schematic diagram of the zone 1 protection relay of the improved new version of the SEL-487B relay according to an embodiment of the present invention. As shown in FIG. 12 , the improved protection relay logic Ln of the new SEL-487B relay includes a first AND gate 11 , a second AND gate 12 , a third AND gate 13 , and a selection element 14 . In addition, the protection relay logic Ln of this embodiment may further include a judging element 15 , a first comparator 16 , a second comparator 17 and a delay action element 18 .

第一及閘11具有三個第一輸入端及一第一輸出端，該些第一輸入端的其中之一連接訊號PLT12，該些第一輸入端的其中另一連接反向的訊號87STCZ1（即訊號87STCZ1的反向訊號），該些第一輸入端的其中又一連接訊號87CZ1。The first AND gate 11 has three first input terminals and a first output terminal, one of the first input terminals is connected to the signal PLT12, and the other of the first input terminals is connected to the inverted signal 87STCZ1 (that is, the signal The reverse signal of 87STCZ1), and another one of the first input terminals is connected to the signal 87CZ1.

第二及閘12具有二個第二輸入端及一第二輸出端，該些第二輸入端的其中之一連接第一及閘11的第一輸出端，該些第二輸入端的其中另一連接訊號87R1（本實施例為應用於Zone 1，故為訊號87R1；當應用在Zone 2時，則為訊號87R2），第二及閘12的第二輸出端輸出訊號87Z1（本實施例為應用於Zone 1，故為訊號87Z1；當應用在Zone 2時，則為訊號87Z2）。The second AND gate 12 has two second input terminals and a second output terminal, one of the second input terminals is connected to the first output terminal of the first AND gate 11, and the other of the second input terminals is connected to Signal 87R1 (this embodiment is applied to Zone 1, so it is signal 87R1; when applied to Zone 2, it is signal 87R2), the second output terminal of the second AND gate 12 outputs signal 87Z1 (this embodiment is applied to Zone 1, so it is signal 87Z1; when it is applied in Zone 2, it is signal 87Z2).

第三及閘13具有四個第三輸入端及一第三輸出端，該些第三輸入端的其中之一連接訊號FDIF1（本實施例為應用於Zone 1，故為訊號FDIF1；當應用在Zone 2時，則為訊號FDIF2），該些第三輸入端的其中另一連接訊號87O1（本實施例為應用於Zone 1，故為訊號87O1；當應用在Zone 2時，則為訊號87O2），第三及閘13的該些第三輸入端的其中又一連接訊號FAULT1（本實施例為應用於Zone 1，故為訊號FAULT1；當應用在Zone 2時，則為訊號FAULT2），選擇元件14的輸出端輸出訊號的反向訊號則輸入第三及閘13的該些第三輸入端的其中再一輸入端（即第三輸入端中的第四個），且第三及閘13的輸出端輸出訊號87R1（本實施例為應用於Zone 1，故為訊號87R1；當應用在Zone 2時，則為訊號87R2）。The third AND gate 13 has four third input terminals and a third output terminal, and one of the third input terminals is connected to the signal FDIF1 (this embodiment is applied to Zone 1, so it is the signal FDIF1; when applied in Zone 2, it is the signal FDIF2), and the other of the third input terminals is connected to the signal 87O1 (this embodiment is applied to Zone 1, so it is the signal 87O1; when it is applied to Zone 2, it is the signal 87O2), the first Another connection signal FAULT1 of the third input terminals of the three-AND gate 13 (this embodiment is applied to Zone 1, so it is the signal FAULT1; when it is applied to Zone 2, it is the signal FAULT2), selects the output of the element 14 The reverse signal of the terminal output signal is then input into the third input terminal of the third input terminal of the third sum gate 13 (that is, the fourth one in the third input terminal), and the output terminal of the third sum gate 13 outputs the signal 87R1 (this embodiment is applied to Zone 1, so the signal is 87R1; when it is applied to Zone 2, it is the signal 87R2).

判斷元件15的輸入端的其中之一連接訊號IRT1（本實施例為應用於Zone 1，故為訊號IRT1；當應用在Zone 2時，則為訊號IRT2），判斷元件15的輸入端的其中另一連接訊號IOP1（本實施例為應用於Zone 1，故為訊號IOP1；當應用在Zone 2時，則為訊號IOP2），判斷元件15的輸出端輸出訊號FDIF1（本實施例為應用於Zone 1，故為訊號FDIF1；當應用在Zone 2時，則為訊號FDIF2）。One of the input ends of the judging element 15 is connected to the signal IRT1 (this embodiment is applied to Zone 1, so it is the signal IRT1; when applied to Zone 2, it is the signal IRT2), and the other of the input ends of the judging element 15 is connected to Signal IOP1 (this embodiment is applied to Zone 1, so it is signal IOP1; when applied to Zone 2, it is signal IOP2), the output terminal of the judgment element 15 outputs signal FDIF1 (this embodiment is applied to Zone 1, so it is signal IOP2) It is the signal FDIF1; when it is applied in Zone 2, it is the signal FDIF2).

第一比較器16的輸入端的其中之一連接訊號IOP1（本實施例為應用於Zone 1，故為訊號IOP1；當應用在Zone 2時，則為訊號IOP2），第一比較器16的輸入端的其中另一連接訊號O87P，且第一比較器16的輸出端輸出訊號87O1（本實施例為應用於Zone 1，故為訊號87O1；當應用在Zone 2時，則為訊號87O2）。One of the input terminals of the first comparator 16 is connected to the signal IOP1 (this embodiment is applied to Zone 1, so it is the signal IOP1; when applied to Zone 2, it is the signal IOP2), the input terminal of the first comparator 16 The other one is connected to the signal O87P, and the output terminal of the first comparator 16 outputs a signal 87O1 (this embodiment is applied to Zone 1, so it is the signal 87O1; when it is applied to Zone 2, it is the signal 87O2).

第二比較器17的輸入端的其中之一連接訊號IOP1（本實施例為應用於Zone 1，故為訊號IOP1；當應用在Zone 2時，則為訊號IOP2），且第二比較器17的輸入端的其中另一連接訊號S87P。One of the input terminals of the second comparator 17 is connected to the signal IOP1 (this embodiment is applied to Zone 1, so it is the signal IOP1; when it is applied to Zone 2, it is the signal IOP2), and the input of the second comparator 17 The other connection signal S87P of the terminal.

延時動作元件18的輸入端連接第二比較器17的輸出端，而選擇元件14的輸入端的其中之一連接延時動作元件18的輸出端，且選擇元件14的輸入端的其中另一連接接地端(N)。本實施例的選擇元件14的輸出端與接地端(N)為直接連接。The input end of the delay action element 18 is connected to the output end of the second comparator 17, and one of the input ends of the selection element 14 is connected to the output end of the delay action element 18, and the other of the input ends of the selection element 14 is connected to the ground terminal ( N). In this embodiment, the output terminal of the selection element 14 is directly connected to the ground terminal (N).

由上述內容及圖11、圖12可知．為使新、舊版SEL-487B電驛的邏輯一致並同時解決新、舊版SEL-487B電驛的上述弱點，新、舊版SEL-487B電驛的邏輯改變分別為：圖11的舊版SEL-487電驛的E87SSUP仍維持接地（E87SSUP = N），但第一及閘11則新增一個輸入端，且新增87ST3的反向訊號輸入該輸入端；而圖12的新版SEL-487B電驛則是將E87SSUP設定為接地（E87SSUP = N），同時第一及閘11的輸入端訊號由OCTZ1改為87STCZ1（Z1S的OCTZ1及Z2S的OCTZ2皆修改為87STCZ1）。其中， 87ST3與87STCZ1的參數功能一致，皆是流進及流出該匯流排的電流總和，僅因版本不同所造成的名稱不同而已。From the above content and Figure 11, Figure 12 we can see. In order to make the logic of the new and old versions of SEL-487B relays consistent and solve the above-mentioned weaknesses of the new and old versions of SEL-487B relays, the logic changes of the new and old versions of SEL-487B relays are as follows: the old version of Figure 11 The E87SSUP of the SEL-487 relay is still grounded (E87SSUP = N), but the first gate 11 adds an input terminal, and the reverse signal of 87ST3 is added to the input terminal; and the new version of SEL-487B in Figure 12 For the relay, set E87SSUP to ground (E87SSUP = N), and at the same time, the input signal of the first AND gate 11 is changed from OCTZ1 to 87STCZ1 (OCTZ1 of Z1S and OCTZ2 of Z2S are both changed to 87STCZ1). Among them, the parameter functions of 87ST3 and 87STCZ1 are the same, they are the sum of the current flowing into and out of the bus bar, and the names are different due to the different versions.

改善後情境分析：Situation analysis after improvement:

(一)、Zone 2 CT Failure 後發生外部故障：(1) External failure occurs after Zone 2 CT Failure:

舊版SEL-487B電驛：Old version SEL-487B relay:

參考圖7的電流情形，可得訊號IOP3為： 𝐼𝑂𝑃3𝐶𝑇 𝑂𝑃𝐸𝑁_𝑒𝑥 = |

| = 4 (43) 𝐼𝑂𝑃3𝐶𝑇 𝑂𝑃𝐸𝑁_𝑒𝑥 ＞ 𝑆87(= 0.1) (44) Referring to the current situation in Figure 7, the signal IOP3 can be obtained as: 𝐼𝑂𝑃3𝐶𝑇 𝑂𝑃𝐸𝑁_𝑒𝑥 = |

| = 4 (43) 𝐼𝑂𝑃3𝐶𝑇 𝑂𝑃𝐸𝑁_𝑒𝑥 > 𝑆87(= 0.1) (44)

因IOP3＞S87P，故87ST3成立而閉鎖Z1S及Z2S，故87B2不會多動作。Because of IOP3>S87P, so 87ST3 is set up and blocks Z1S and Z2S, so 87B2 will not move more.

新版SEL-487B電驛：New version of SEL-487B relay:

參考圖7的電流情形，可得IOPCZ1為： 𝐼𝑂𝑃𝐶𝑍1𝐶𝑇 𝑂𝑃𝐸𝑁_𝑒𝑥 = |

| = 4 (45) 𝐼𝑂𝑃𝐶𝑍1𝐶𝑇 𝑂𝑃𝐸𝑁_𝑒𝑥 ＞ 𝐶𝑍𝑆87(= 0.1) (46) Referring to the current situation in Figure 7, IOPCZ1 can be obtained as: 𝐼𝑂𝑃𝐶𝑍1𝐶𝑇 𝑂𝑃𝐸𝑁_𝑒𝑥 = |

| = 4 (45) 𝐼𝑂𝑃𝐶𝑍1𝐶𝑇 𝑂𝑃𝐸𝑁_𝑒𝑥 > 𝐶𝑍𝑆87(= 0.1) (46)

因IOPCZ1＞CZS87P，則訊號87STCZ1成立而閉鎖訊號Z1S及Z2S，故87B2不會多動作。Because IOPCZ1>CZS87P, then the signal 87STCZ1 is established and the signals Z1S and Z2S are blocked, so 87B2 will not act more.

(二)、第二匯流排#2 BUS停用後發生第一匯流排#1 BUS故障：(2) The first bus #1 BUS fault occurs after the second bus #2 BUS is disabled:

舊版 SEL-487B電驛：Legacy SEL-487B Relay:

參考圖9的電流情形，可得第二匯流排#2 BUS停用但尚未發生第一匯流排#1 BUS故障情況的IOP3： 𝐼𝑂𝑃3#2 𝐵𝑈𝑆 𝑆𝑇𝑂𝑃 = |

| = 0 (47) 𝐼𝑂𝑃3#2 𝐵𝑈𝑆 𝑆𝑇𝑂𝑃 ＜ 𝑆87(= 0.1) (48) Referring to the current situation in Figure 9, the IOP3 of the second bus #2 BUS disabled but the first bus #1 BUS failure has not occurred: 𝐼𝑂𝑃3#2 𝐵𝑈𝑆 𝑆𝑇𝑂𝑃 = |

| = 0 (47) 𝐼𝑂𝑃3#2 𝐵𝑈𝑆 𝑆𝑇𝑂𝑃 < 𝑆87(= 0.1) (48)

發生第一匯流排#1 BUS故障瞬間，因87ST3不成立，故87B1及87B2沒被閉鎖。參考圖10的電流情形，可得第二匯流排#2 BUS停用後發生第一匯流排#1 BUS故障情況的IOP1及IOP2，如式(49)至式(54)，因保護功能尚未被閉鎖，故電驛仍可正常動作以隔離故障。 𝐼𝑂𝑃1#2 𝐵𝑈𝑆 𝑆𝑇𝑂𝑃 = |

| = 3.4 (49) 𝐼𝑅𝐸1#2 𝐵𝑈𝑆 𝑆𝑇𝑂𝑃 =

= 4.6 (50) 𝐼𝑂𝑃1 ＞ 𝑆𝐿𝑃1 × 𝐼𝑅𝐸1 = 0.6 × 4.6 = 2.76 (51) 𝐼𝑂𝑃3#2 𝐵𝑈𝑆 𝑆𝑇𝑂𝑃 = |

| = 3.2 (52) 𝐼𝑅𝐸1#2 𝐵𝑈𝑆 𝑆𝑇𝑂𝑃 =

= 4.8 (53) 𝐼𝑂𝑃1 ＞ 𝑆𝐿𝑃1 × 𝐼𝑅𝐸1 = 0.6 × 4.8 = 2.88 (54) At the moment when the first bus #1 BUS fault occurs, 87B1 and 87B2 are not blocked because 87ST3 is not established. Referring to the current situation in Figure 10, the IOP1 and IOP2 of the first bus #1 BUS failure after the second bus #2 BUS is deactivated can be obtained, such as formula (49) to formula (54), because the protection function has not been Locked, so the relay can still operate normally to isolate the fault. 𝐼𝑂𝑃1#2 𝐵𝑈𝑆 𝑆𝑇𝑂𝑃 = |

| = 3.4 (49) 𝐼𝑅𝐸1#2 𝐵𝑈𝑆 𝑆𝑇𝑂𝑃 =

= 4.6 (50) 𝐼𝑂𝑃1 > 𝑆𝐿𝑃1 × 𝐼𝑅𝐸1 = 0.6 × 4.6 = 2.76 (51) 𝐼𝑂𝑃3#2 𝐵𝑈𝑆 𝑆𝑇𝑂𝑃 = |

| = 3.2 (52) 𝐼𝑅𝐸1#2 𝐵𝑈𝑆 𝑆𝑇𝑂𝑃 =

= 4.8 (53) 𝐼𝑂𝑃1 > 𝑆𝐿𝑃1 × 𝐼𝑅𝐸1 = 0.6 × 4.8 = 2.88 (54)

新版 SEL-487B：Newer SEL-487B:

參考圖9的電流情形，可得第二匯流排#2 BUS停用但尚未發生第一匯流排#1 BUS故障情況的IOPCZ1： 𝐼𝑂𝑃𝐶𝑍1#2 𝐵𝑈𝑆 𝑆𝑇𝑂𝑃 = |

| = 0 (55) 𝐼𝑂𝑃𝐶𝑍1#2 𝐵𝑈𝑆 𝑆𝑇𝑂𝑃 ＜ 𝐶𝑍𝑆87(= 0.1) (56) Referring to the current situation in Figure 9, we can get the IOPCZ1 where the second bus #2 BUS is disabled but the first bus #1 BUS has not yet failed: 𝐼𝑂𝑃𝐶𝑍1#2 𝐵𝑈𝑆 𝑆𝑇𝑂𝑃 = |

| = 0 (55) 𝐼𝑂𝑃𝐶𝑍1#2 𝐵𝑈𝑆 𝑆𝑇𝑂𝑃 < 𝐶𝑍𝑆87(= 0.1) (56)

發生第一匯流排#1 BUS故障瞬間，因訊號87STCZ1不成立，故87B1及87B2沒被閉鎖。參考圖10的電流情形，可得第二匯流排#2 BUS停用後發生第一匯流排#1 BUS故障情況的IOP1及IOP2，如式(57)至式(62)，因保護功能尚未被閉鎖，故電驛仍可正常動作以隔離故障。 𝐼𝑂𝑃1#2 𝐵𝑈𝑆 𝑆𝑇𝑂𝑃 = |

| = 3.4 (57) 𝐼𝑅𝐸1#2 𝐵𝑈𝑆 𝑆𝑇𝑂𝑃 =

= 4.6 (58) 𝐼𝑂𝑃1 ＞ 𝑆𝐿𝑃1 × 𝐼𝑅𝐸1 = 0.6 × 4.6 = 2.76 (59) 𝐼𝑂𝑃3#2 𝐵𝑈𝑆 𝑆𝑇𝑂𝑃 = |

| = 3.2 (60) 𝐼𝑅𝐸1#2 𝐵𝑈𝑆 𝑆𝑇𝑂𝑃 =

= 4.8 (61) 𝐼𝑂𝑃1 ＞ 𝑆𝐿𝑃1 × 𝐼𝑅𝐸1 = 0.6 × 4.8 = 2.88 (62) At the moment when the first bus #1 BUS fault occurs, because the signal 87STCZ1 is not established, 87B1 and 87B2 are not blocked. Referring to the current situation in Figure 10, the IOP1 and IOP2 of the first bus #1 BUS failure after the second bus #2 BUS is disabled can be obtained, such as formula (57) to formula (62), because the protection function has not been Locked, so the relay can still operate normally to isolate the fault. 𝐼𝑂𝑃1#2 𝐵𝑈𝑆 𝑆𝑇𝑂𝑃 = |

| = 3.4 (57) 𝐼𝑅𝐸1#2 𝐵𝑈𝑆 𝑆𝑇𝑂𝑃 =

= 4.6 (58) 𝐼𝑂𝑃1 > 𝑆𝐿𝑃1 × 𝐼𝑅𝐸1 = 0.6 × 4.6 = 2.76 (59) 𝐼𝑂𝑃3#2 𝐵𝑈𝑆 𝑆𝑇𝑂𝑃 = |

| = 3.2 (60) 𝐼𝑅𝐸1#2 𝐵𝑈𝑆 𝑆𝑇𝑂𝑃 =

= 4.8 (61) 𝐼𝑂𝑃1 > 𝑆𝐿𝑃1 × 𝐼𝑅𝐸1 = 0.6 × 4.8 = 2.88 (62)

本發明為求模擬結果更契合實際運轉情形，依實際系統參數利用RTDS Technologies公司所開發的即時數位模擬器（Real Time Digital Simulator, RTDS）建置分析模型，並進行現場回放測試，以確認上述邏輯修改是否可以解決新、舊版本SEL-487電驛的保護邏輯的盲點。在此，測試的情境如下：(一)、第二匯流排#2 BUS停電後6.5秒，發生第一匯流排#1 BUS故障；(二)、CT Failure後6秒，發生外部故障。在情境(一)時，當發生第一匯流排#1 BUS故障時，訊號87Z1及訊號87Z2皆能動作以排除故障。而在情境(二)時，保護功能確實可被閉鎖，故當發生外部故障時電驛不會動作。In order to ensure that the simulation results are more in line with the actual operating conditions, the present invention utilizes the real-time digital simulator (Real Time Digital Simulator, RTDS) developed by RTDS Technologies to build an analysis model according to the actual system parameters, and conducts an on-site playback test to confirm the above logic Whether the modification can solve the blind spots of the protection logic of the new and old versions of the SEL-487 relay. Here, the test scenarios are as follows: (1), 6.5 seconds after the second bus #2 BUS is powered off, the first bus #1 BUS fault occurs; (2), 6 seconds after the CT Failure, an external fault occurs. In situation (1), when the first bus #1 BUS fails, both the signal 87Z1 and the signal 87Z2 can act to eliminate the failure. And in situation (2), the protection function can indeed be blocked, so the relay will not act when an external fault occurs.

如此可見，藉由本文上述所提出改善後的新、舊版本SEL-487電驛的保護電驛邏輯Lo、Ln，透過即時數位模擬器(RTDS)模擬與現場回放測試，不僅可以改善現有新、舊版本SEL-487電驛之保護邏輯的盲點，還使新、舊版SEL-487B電驛的保護邏輯可以一致。It can be seen that, with the improved protection relay logic Lo and Ln of the new and old versions of the SEL-487 relay proposed above, through the real-time digital simulator (RTDS) simulation and on-site playback test, not only can the existing new and old versions be improved. The blind spot of the protection logic of the old version SEL-487 relay also makes the protection logic of the new and old SEL-487B relays consistent.

本文所提出之新、舊版SEL-487B電驛的修改後邏輯規劃已於2018年12月底套用至台電公司全部的161kV電力系統的SEL-487B電驛，實際系統已運行1年以上無異常。在實際事故案例部分，2020年某變電所進行匯流排設備停電檢查工作，在工作完成復電加壓時該停電匯流排發生故障，正好是本文改善邏輯所考慮的情境，顯示任何機率小的故障情境都還是有發生的機會，該次事故的SEL-487B匯流排保護電驛即時正確動作跳脫並隔離故障，再一次驗證本文改善後新邏輯的正確性。The modified logical planning of the new and old versions of SEL-487B relays proposed in this article has been applied to all SEL-487B relays of Taipower’s 161kV power system at the end of December 2018. The actual system has been in operation for more than one year without abnormalities. In the part of the actual accident case, a substation in 2020 carried out a power failure inspection of the busbar equipment. When the work was completed and the power was restored, the power failure busbar failed. Fault scenarios still have a chance to occur. The SEL-487B busbar protection relay in this accident tripped and isolated the fault immediately and correctly, which once again verified the correctness of the improved logic in this paper.

綜上所述，在本發明的具有連絡斷路器之雙匯流排電力系統的保護電驛邏輯及應用該保護電驛邏輯的雙匯流排電力系統中，藉由上述的邏輯規劃，可以改善現有版本SEL-487B電驛的保護邏輯的盲點，還使現有版本SEL-487B電驛的保護邏輯可以一致，進而可使具有連絡斷路器之雙匯流排電力系統可以提供穩定的供電。To sum up, in the protection relay logic of the dual-bus-bar power system with a tie circuit breaker and the dual-bus-bar power system using the protection relay logic of the present invention, the existing version can be improved by the above-mentioned logic planning The blind spot of the protection logic of the SEL-487B relay also makes the protection logic of the existing version of the SEL-487B relay consistent, which in turn enables the dual busbar power system with tie circuit breakers to provide stable power supply.

以上所述僅為舉例性，而非為限制性者。任何未脫離本發明的精神與範疇，而對其進行的等效修改或變更，均應包含於後附的申請專利範圍中。The above descriptions are illustrative only, not restrictive. Any equivalent modification or change made without departing from the spirit and scope of the present invention shall be included in the scope of the appended patent application.

1:雙匯流排電力系統 11:第一及閘 12:第二及閘 13:第三及閘 14:選擇元件 15:判斷元件 16:第一比較器 17:第二比較器 18:延時動作元件 87CZ1,87O1,87R1,87S1,87ST,87ST1,87ST3,87STCZ1,87Z1,87Z2,FAULT1,FDIF1,IOP1,IRT1,O87P,OCTZ1,PCT06Q,PLT12,S87P,Z1S,△IOPIR:訊號 CB0:連絡斷路器 CB1,CB3:第一斷路器 CB2,CB4:第二斷路器 CT0,CT0’,CT1～CT4:比流器 DS1～DS4:隔離開關 I1～I6:電流 Lo,Ln:保護電驛邏輯 L1,S1:第一電力設備 L2,S2:第二電力設備 SS:感測訊號 #1 BUS:第一匯流排 #2 BUS:第二匯流排1: Double busbar power system 11: First and gate 12:Second and gate 13: The third gate 14:Select components 15: Judgment element 16: The first comparator 17: The second comparator 18: Delay action element Signal CB0: tie circuit breaker CB1, CB3: first circuit breaker CB2, CB4: second circuit breaker CT0, CT0', CT1～CT4: Current ratio DS1～DS4: isolation switch I1～I6: current Lo, Ln: protection relay logic L1, S1: the first electrical equipment L2, S2: Second power equipment SS: Sensing signal #1 BUS: First Bus #2 BUS: Second Bus

圖1A為本發明一實施例之具有連絡斷路器之雙匯流排電力系統的架構示意圖。圖1B為SEL-487B電驛的功能方塊示意圖。圖2為圖1A的雙匯流排電力系統中，舊版SEL-487B電驛的第一區域的邏輯規劃示意圖。圖3為圖1A的雙匯流排電力系統中，新版SEL-487B電驛的第一區域的邏輯規劃示意圖。圖4為訊號OCTZ1的邏輯示意圖。圖5為圖1A的雙匯流排電力系統1中，未發生比流器異常時的電路示意圖。圖6為圖1A的雙匯流排電力系統1中，發生比流器異常時的電路示意圖。圖7為圖1A的雙匯流排電力系統1中，發生比流器異常後再發生外部故障時的電路示意圖。圖8為圖1A的雙匯流排電力系統1中，正常運轉時的電路示意圖。圖9為圖1A的雙匯流排電力系統1中，第二匯流排停用時的電路示意圖。圖10為圖1A的雙匯流排電力系統1中，第二匯流排停用時發生第一匯流排故障的電路示意圖。圖11為本發明一實施例之改善後舊版SEL-487B電驛的第一區域的保護電驛邏輯示意圖。圖12為本發明一實施例之改善後新版SEL-487B電驛的第一區域的保護電驛邏輯示意圖。 FIG. 1A is a schematic structural diagram of a double-bus-bar power system with tie circuit breakers according to an embodiment of the present invention. FIG. 1B is a functional block diagram of the SEL-487B relay. FIG. 2 is a schematic diagram of the logical planning of the first area of the old version of the SEL-487B relay in the dual-bus-bar power system of FIG. 1A. Fig. 3 is a schematic diagram of the logical planning of the first area of the new SEL-487B relay in the dual-bus-bar power system of Fig. 1A. FIG. 4 is a logic diagram of the signal OCTZ1. FIG. 5 is a schematic circuit diagram of the double busbar power system 1 in FIG. 1A when no abnormality of the current comparator occurs. FIG. 6 is a schematic circuit diagram when a current comparator is abnormal in the double-bus-bar power system 1 of FIG. 1A . FIG. 7 is a schematic diagram of the circuit when an external fault occurs after the current comparator is abnormal in the double-bus-bar power system 1 of FIG. 1A . FIG. 8 is a schematic diagram of the circuit in normal operation of the dual-bus-bar power system 1 in FIG. 1A . FIG. 9 is a schematic circuit diagram when the second bus bar is disabled in the double bus bar power system 1 of FIG. 1A . FIG. 10 is a schematic circuit diagram of a first bus-bar fault occurring when the second bus-bar is disabled in the dual-bus-bar power system 1 of FIG. 1A . FIG. 11 is a logical schematic diagram of the protection relay of the first area of the old SEL-487B relay after improvement according to an embodiment of the present invention. FIG. 12 is a logical schematic diagram of the protection relay in the first area of the improved new version of the SEL-487B relay according to an embodiment of the present invention.

87Z1,87Z2:訊號 87Z1, 87Z2: signal

CB0:連絡斷路器 CB0: tie circuit breaker

CB1,CB3:第一斷路器 CB1, CB3: first circuit breaker

CB2,CB4:第二斷路器 CB2, CB4: second circuit breaker

CT0,CT0’,CT1~CT4:比流器 CT0, CT0', CT1~CT4: current ratio

DS1~DS4:隔離開關 DS1~DS4: isolation switch

L1,S1:第一電力設備 L1, S1: the first electrical equipment

L2,S2:第二電力設備 L2, S2: Second electrical equipment

#1 BUS:第一匯流排 #1 BUS: First Bus

#2 BUS:第二匯流排 #2 BUS: Second Bus

Claims

一種具有連絡斷路器之雙匯流排電力系統的保護電驛邏輯，該雙匯流排電力系統包括一第一匯流排、一第二匯流排、該連絡斷路器、一第一電力設備、一第二電力設備及一SEL-487B電驛，該連絡斷路器連接於該第一匯流排與該第二匯流排之間，該第一電力設備透過對應的一第一斷路器連接於該第一匯流排，該第二電力設備透過對應的一第二斷路器連接於該第二匯流排，該SEL-487B電驛電性連接該連絡斷路器、該第一斷路器及該第二斷路器，該SEL-487B電驛輸出的一訊號87Z1控制該連絡斷路器及該第一斷路器，該SEL-487B電驛輸出的一訊號87Z2控制該連絡斷路器及該第二斷路器；該SEL-487B電驛具有該保護電驛邏輯，該保護電驛邏輯包括：一第一及閘，具有三個第一輸入端及一第一輸出端，該些第一輸入端的其中之一連接一訊號PLT12，該些第一輸入端的其中另一連接一訊號PCT06Q，該些第一輸入端的其中又一連接反向的一訊號87ST3；以及一第二及閘，具有二個第二輸入端及一第二輸出端，該些第二輸入端的其中之一連接該第一輸出端，該些第二輸入端的其中另一連接一訊號87R1或訊號87R2，且該第二輸出端輸出該訊號87Z1或訊號87Z2；其中，當應用於一第一區域時，則該些第二輸入端的其中另一連接該訊號87R1，且該第二輸出端輸出該訊號87Z1；當應用於一第二區域時，則該些第二輸入端的其中另一連接該訊號87R2，且該第二輸出端輸出該訊號87Z2。 A protection relay logic for a double-bus-bar power system with a tie circuit breaker, the double-bus-bar power system includes a first bus bar, a second bus bar, the tie circuit breaker, a first electric device, a second Electric equipment and a SEL-487B relay, the tie circuit breaker is connected between the first bus bar and the second bus bar, the first electrical equipment is connected to the first bus bar through a corresponding first circuit breaker , the second power equipment is connected to the second bus bar through a corresponding second circuit breaker, the SEL-487B relay is electrically connected to the tie circuit breaker, the first circuit breaker and the second circuit breaker, the SEL - A signal 87Z1 output by the 487B electric relay controls the tie circuit breaker and the first circuit breaker, and a signal 87Z2 output by the SEL-487B electric relay controls the tie circuit breaker and the second circuit breaker; the SEL-487B electric relay With the protection relay logic, the protection relay logic includes: A first AND gate has three first input terminals and a first output terminal. One of the first input terminals is connected to a signal PLT12, and the other of the first input terminals is connected to a signal PCT06Q. Another one of the first input terminals is connected to a reversed signal 87ST3; and A second AND gate has two second input terminals and a second output terminal, one of the second input terminals is connected to the first output terminal, and the other of the second input terminals is connected to a signal 87R1 or signal 87R2, and the second output terminal outputs either the signal 87Z1 or the signal 87Z2; Wherein, when applied to a first region, the other of the second input terminals is connected to the signal 87R1, and the second output terminal outputs the signal 87Z1; when applied to a second region, the first The other one of the two input terminals is connected to the signal 87R2, and the second output terminal outputs the signal 87Z2.

如請求項1所述的保護電驛邏輯，其中該第一電力設備或該第二電力設備為電源或負載。The protection relay logic according to claim 1, wherein the first electric device or the second electric device is a power source or a load.

如請求項1所述的保護電驛邏輯，更包括：一判斷元件，其中，當應用於該第一區域時，該判斷元件的輸入端的其中之一連接一訊號IRT1，其輸入端的其中另一連接一訊號IOP1；當應用於該第二區域時，該判斷元件的輸入端的其中之一連接一訊號IRT2，其輸入端的其中另一連接一訊號IOP2；一第一比較器，其中，當應用於該第一區域時，該第一比較器的輸入端的其中之一連接一訊號IOP1，其輸入端的其中另一連接一訊號O87P；當應用於該第二區域時，該第一比較器的輸入端的其中之一連接一訊號IOP2，其輸入端的其中另一連接該訊號O87P；及一第二比較器，其中，當應用於該第一區域時，該第二比較器的輸入端的其中之一連接一訊號IOP1，其輸入端的其中另一連接一訊號S87P；當應用於該第二區域時，該第二比較器的輸入端的其中之一連接一訊號IOP2，其輸入端的其中另一連接該訊號S87P。 The protection relay logic as described in claim 1 further includes: A judging element, wherein, when applied to the first area, one of the input ends of the judging element is connected to a signal IRT1, and the other of its input ends is connected to a signal IOP1; when applied to the second area, the One of the input ends of the judging element is connected to a signal IRT2, and the other of the input ends is connected to a signal IOP2; A first comparator, wherein, when applied to the first region, one of the input terminals of the first comparator is connected to a signal IOP1, and the other input terminal of the first comparator is connected to a signal O87P; when applied to the second When in the region, one of the input terminals of the first comparator is connected to a signal IOP2, and the other input terminal of the first comparator is connected to the signal O87P; and A second comparator, wherein, when applied to the first region, one of the input terminals of the second comparator is connected to a signal IOP1, and the other of its input terminals is connected to a signal S87P; when applied to the second In the region, one of the input terminals of the second comparator is connected to a signal IOP2, and the other input terminal of the second comparator is connected to the signal S87P.

如請求項3所述的保護電驛邏輯，更包括：一延時動作元件，其輸入端連接該第二比較器的輸出端；及一選擇元件，其輸入端的其中之一連接該延時動作元件的輸出端，其輸入端的其中另一連接一接地端。 The protection relay logic as described in claim item 3 further includes: a delay action element, the input end of which is connected to the output end of the second comparator; and A selection element, one of its input ends is connected to the output end of the delay action element, and the other of its input ends is connected to a ground end.

如請求項4所述的保護電驛邏輯，更包括：一第三及閘，具有四個第三輸入端及一第三輸出端，該些第三輸入端的其中之一連接該判斷元件的輸出端，該些第三輸入端的其中另一連接該第一比較器的輸出端，該些第三輸入端的其中又一連接一訊號FAULT1或訊號FAULT2，該選擇元件的輸出端輸出訊號的反向輸入該些第三輸入端的其中再一輸入端，該第三及閘的輸出端輸出該訊號87R1或訊號87R2；其中，當應用於該第一區域時，該些第三輸入端的其中又一連接該訊號FAULT1，該第三及閘的輸出端輸出該訊號87R1；當應用於該第二區域時，該些第三輸入端的其中又一連接該訊號FAULT2，該第三及閘的輸出端輸出該訊號87R2。 The protection relay logic as described in claim item 4 further includes: A third AND gate has four third input terminals and a third output terminal, one of the third input terminals is connected to the output terminal of the judgment element, and the other of the third input terminals is connected to the first The output terminal of the comparator, one of the third input terminals is connected to a signal FAULT1 or signal FAULT2, the output terminal of the selection element outputs the reverse input signal to another input terminal of the third input terminals, and the third input terminal The output terminal of the gate outputs the signal 87R1 or the signal 87R2; Wherein, when applied to the first region, another one of the third input terminals is connected to the signal FAULT1, and the output terminal of the third AND gate outputs the signal 87R1; when applied to the second region, the first Another one of the three input terminals is connected to the signal FAULT2, and the output terminal of the third AND gate outputs the signal 87R2.

一種具有連絡斷路器之雙匯流排電力系統的保護電驛邏輯，該雙匯流排電力系統包括一第一匯流排、一第二匯流排、該連絡斷路器、一第一電力設備、一第二電力設備及一SEL-487B電驛，該連絡斷路器連接於該第一匯流排與該第二匯流排之間，該第一電力設備透過對應的一第一斷路器連接於該第一匯流排，該第二電力設備透過對應的一第二斷路器連接於該第二匯流排，該SEL-487B電驛輸出的一訊號87Z1控制該連絡斷路器及該第一斷路器，該SEL-487B電驛輸出的一訊號87Z2控制該連絡斷路器及該第二斷路器；該SEL-487B電驛具有該保護電驛邏輯，該保護電驛邏輯包括：一第一及閘，具有三個第一輸入端及一第一輸出端，該些第一輸入端的其中之一連接一訊號PLT12，該些第一輸入端的其中另一連接反向的一訊號87STCZ1，該些第一輸入端的其中又一連接一訊號87CZ1；一第二及閘，具有二個第二輸入端及一第二輸出端，該些第二輸入端的其中之一連接該第一輸出端，該些第二輸入端的其中另一連接一訊號87R1或訊號87R2，該第二輸出端輸出該訊號87Z1或訊號87Z2，其中當應用於一第一區域時，該些第二輸入端的其中另一連接該訊號87R1，該第二輸出端輸出該訊號87Z1；當應用於一第二區域時，該些第二輸入端的其中另一連接該訊號87R2，該第二輸出端輸出該訊號87Z2；一第三及閘，具有四個第三輸入端及一第三輸出端，該些第三輸入端的其中之一連接一訊號FDIF1或訊號FDIF2，該些第三輸入端的其中另一連接一訊號87O1或訊號87O2，該些第三輸入端的其中又一連接一訊號FAULT1或訊號FAULT2，且該第三及閘的輸出端輸出該訊號87R1或訊號87R2，其中當應用於該第一區域時，該些第三輸入端的其中之一連接該訊號FDIF1，該些第三輸入端的其中另一連接該訊號87O1，該些第三輸入端的其中又一連接該訊號FAULT1，該第三及閘的輸出端輸出該訊號87R1；當應用於該第二區域時，該些第三輸入端的其中之一連接該訊號FDIF2，該些第三輸入端的其中另一連接該訊號87O2，該些第三輸入端的其中又一連接該訊號FAULT2，該第三及閘的輸出端輸出該訊號87R2；以及一選擇元件，其輸出端輸出訊號的反向輸入該些第三輸入端的其中再一輸入端。 A protection relay logic for a double-bus-bar power system with a tie circuit breaker, the double-bus-bar power system includes a first bus bar, a second bus bar, the tie circuit breaker, a first electric device, a second Electric equipment and a SEL-487B relay, the tie circuit breaker is connected between the first bus bar and the second bus bar, the first electrical equipment is connected to the first bus bar through a corresponding first circuit breaker , the second power equipment is connected to the second bus bar through a corresponding second circuit breaker, and a signal 87Z1 output by the SEL-487B electric relay controls the tie circuit breaker and the first circuit breaker, and the SEL-487B electric A signal 87Z2 output by the relay controls the tie circuit breaker and the second circuit breaker; the SEL-487B relay has the protection relay logic, and the protection relay logic includes: A first AND gate has three first input terminals and a first output terminal, one of these first input terminals is connected to a signal PLT12, and the other of these first input terminals is connected to an inverted signal 87STCZ1 , another one of the first input terminals is connected to a signal 87CZ1; A second AND gate has two second input terminals and a second output terminal, one of the second input terminals is connected to the first output terminal, and the other of the second input terminals is connected to a signal 87R1 or signal 87R2, the second output terminal outputs the signal 87Z1 or the signal 87Z2, wherein when applied to a first area, the other one of the second input terminals is connected to the signal 87R1, and the second output terminal outputs the signal 87Z1; When applied to a second area, another one of the second input terminals is connected to the signal 87R2, and the second output terminal outputs the signal 87Z2; A third AND gate with four third input terminals and a third output terminal, one of these third input terminals is connected to a signal FDIF1 or signal FDIF2, and the other of these third input terminals is connected to a signal 87O1 Or signal 87O2, another one of these third input terminals is connected to a signal FAULT1 or signal FAULT2, and the output terminal of the third AND gate outputs the signal 87R1 or signal 87R2, wherein when applied to the first area, these One of the third input terminals is connected to the signal FDIF1, the other of the third input terminals is connected to the signal 87O1, another of the third input terminals is connected to the signal FAULT1, and the output terminal of the third AND gate outputs the Signal 87R1; when applied to the second area, one of the third input terminals is connected to the signal FDIF2, another of the third input terminals is connected to the signal 87O2, and another of the third input terminals is connected to The signal FAULT2, the output terminal of the third AND gate outputs the signal 87R2; and A selection element, the inverse of the signal output from the output terminal is input to another input terminal of the third input terminals.

如請求項6所述的保護電驛邏輯，其中該第一電力設備或該第二電力設備為電源或負載。The protection relay logic as claimed in claim 6, wherein the first electric device or the second electric device is a power source or a load.

如請求項6所述的保護電驛邏輯，更包括：一判斷元件，其中，當應用於該第一區域時，該判斷元件的輸入端的其中之一連接一訊號IRT1，其輸入端的其中另一連接一訊號IOP1，其輸出端輸出該訊號FDIF1；當應用於該第二區域時，該判斷元件的輸入端的其中之一連接一訊號IRT2，其輸入端的其中另一連接一訊號IOP2，其輸出端輸出該訊號FDIF2；一第一比較器，其中，當應用於該第一區域時，該第一比較器的輸入端的其中之一連接該訊號IOP1，其輸入端的其中另一連接一訊號O87P，其輸出端輸出該訊號87O1；當應用於該第二區域時，該第一比較器的輸入端的其中之一連接該訊號IOP2，其輸入端的其中另一連接該訊號O87P，其輸出端輸出該訊號87O2；及一第二比較器，其中，當應用於該第一區域時，該第二比較器的輸入端的其中之一連接該訊號IOP1，其輸入端的其中另一連接一訊號S87P；當應用於該第二區域時，該第二比較器的輸入端的其中之一連接該訊號IOP2，其輸入端的其中另一連接該訊號S87P。 The protection relay logic as described in claim item 6 further includes: A judging element, wherein, when applied to the first region, one of the input ends of the judging element is connected to a signal IRT1, the other of its input ends is connected to a signal IOP1, and its output end outputs the signal FDIF1; when applied When in the second area, one of the input terminals of the judgment element is connected to a signal IRT2, the other of its input terminals is connected to a signal IOP2, and its output terminal outputs the signal FDIF2; A first comparator, wherein, when applied to the first region, one of the input terminals of the first comparator is connected to the signal IOP1, the other of its input terminals is connected to a signal O87P, and its output terminal outputs the signal 87O1; when applied to the second region, one of the input terminals of the first comparator is connected to the signal IOP2, the other of its input terminals is connected to the signal O87P, and its output terminal outputs the signal 87O2; and A second comparator, wherein, when applied to the first region, one of the input terminals of the second comparator is connected to the signal IOP1, and the other input terminal of the second comparator is connected to a signal S87P; when applied to the second In the region, one of the input terminals of the second comparator is connected to the signal IOP2, and the other input terminal of the second comparator is connected to the signal S87P.

如請求項8所述的保護電驛邏輯，更包括：一延時動作元件，其輸入端連接該第二比較器的輸出端；其中，該選擇元件的輸入端的其中之一連接該延時動作元件的輸出端，其輸入端的其中另一連接一接地端。 The protection relay logic as described in claim item 8 further includes: A delay action element, the input end of which is connected to the output end of the second comparator; Wherein, one of the input ends of the selection element is connected to the output end of the delay action element, and the other of the input ends is connected to a ground end.

如請求項9所述的保護電驛邏輯，其中該選擇元件的輸出端與該接地端直接連接。The protection relay logic as claimed in claim 9, wherein the output terminal of the selection element is directly connected to the ground terminal.

一種雙匯流排電力系統，包括：一第一匯流排及一第二匯流排；一連絡斷路器，連接於該第一匯流排與該第二匯流排之間；一第一電力設備，透過對應的一第一斷路器連接於該第一匯流排；一第二電力設備，透過對應的一第二斷路器連接於該第二匯流排；以及一SEL-487B電驛，電性連接該連絡斷路器、該第一斷路器及該第二斷路器，該SEL-487B電驛輸出的一訊號87Z1控制該連絡斷路器及該第一斷路器，該SEL-487B電驛輸出的一訊號87Z2控制該連絡斷路器及該第二斷路器；其中，該SEL-487B電驛具有如請求項1至10中任一項所述的保護電驛邏輯。 A dual busbar power system comprising: a first bus bar and a second bus bar; a tie circuit breaker connected between the first bus bar and the second bus bar; A first electric device connected to the first bus bar through a corresponding first circuit breaker; a second electrical device connected to the second bus bar through a corresponding second circuit breaker; and a SEL-487B relay electrically connected to the tie circuit breaker, the first circuit breaker and the second circuit breaker, a signal 87Z1 output by the SEL-487B relay controls the tie circuit breaker and the first circuit breaker, A signal 87Z2 output by the SEL-487B relay controls the tie circuit breaker and the second circuit breaker; Wherein, the SEL-487B relay has the protection relay logic described in any one of claims 1 to 10.