JP2020148748A - Emergency power source facility of nuclear power plant, and control method and control device of the same - Google Patents

Emergency power source facility of nuclear power plant, and control method and control device of the same Download PDF

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Publication number
JP2020148748A
JP2020148748A JP2019049183A JP2019049183A JP2020148748A JP 2020148748 A JP2020148748 A JP 2020148748A JP 2019049183 A JP2019049183 A JP 2019049183A JP 2019049183 A JP2019049183 A JP 2019049183A JP 2020148748 A JP2020148748 A JP 2020148748A
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emergency
power supply
phase
power
open
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JP7118915B2 (en
Inventor
孝太 北住
Kota Kitazumi
孝太 北住
雄大 田中
Takehiro Tanaka
雄大 田中
田中　誠
Makoto Tanaka
田中　　誠
博 奈良
Hiroshi Nara
博 奈良
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Toshiba Corp
Toshiba Energy Systems and Solutions Corp
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Toshiba Corp
Toshiba Energy Systems and Solutions Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin

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Abstract

To prevent unnecessary startup of an emergency diesel power generator when phase interruption occurs in only one system of a plurality of emergency power source systems in a nuclear power plant where phase interruption failure detection equipment is installed to the plurality of emergency power source systems.SOLUTION: An emergency power source facility having a plurality of emergency power source systems and equipment for detecting a phase interruption failure of each reception transformer isolates an external power source and starts an emergency diesel generator when phase interruption is detected in all the reception transformers of the systems supplying power to an emergency bus line in a normal state.SELECTED DRAWING: Figure 2

Description

本発明は、原子力発電所の非常用電源設備およびその制御方法、制御装置に関する。 The present invention relates to an emergency power supply facility for a nuclear power plant, a control method thereof, and a control device.

原子力発電所の非常用所内電源系は、非常用炉心冷却系（ＥＣＣＳ）等に安定した電力
を供給し、原子炉の安全の維持に必要となる、重要度の高い電源設備である。 The emergency power supply system of a nuclear power plant is a highly important power supply facility that supplies stable power to an emergency core cooling system (ECCS) and the like and is necessary for maintaining the safety of the reactor.

特開平４−００８１２４号公報Japanese Unexamined Patent Publication No. 4-008124

近年、電源系統の単相欠相が発生した場合に、これを検知して故障箇所を隔離する等し
て安定した電力供給を維持することが求められている。 In recent years, when a single-phase open phase of a power supply system occurs, it is required to detect it and isolate a faulty part to maintain a stable power supply.

一方で、非常用所内電源系に単相欠相の検知機器を導入し、この検知機器を外部電源系
の隔離及び非常用ディーゼル発電機の起動を行うインターロックに加える場合は、検知機
器の誤検知や誤動作に伴う不要な非常用ディーゼル発電機起動を抑制できることが望まれ
る。欠相故障検知装置の検出信号をそのまま非常用ディーゼル発電機の起動インターロッ
クに用いると、外部電源系に健全系統があるにもかかわらず不要な非常用ディーゼル起動
を引き起こしてしまう。また、欠相故障検知装置の誤検知や誤動作、単体故障の際に非常
用ディーゼル発電機起動を引き起こしてしまう。 On the other hand, if a single-phase open-phase detection device is installed in the emergency power supply system and this detection device is added to the interlock that isolates the external power supply system and starts the emergency diesel generator, the detection device is incorrect. It is desirable to be able to suppress unnecessary emergency diesel generator startup due to detection and malfunction. If the detection signal of the open phase failure detection device is used as it is for the start interlock of the emergency diesel generator, it causes an unnecessary emergency diesel start even though the external power supply system has a sound system. In addition, the emergency diesel generator will be started in the event of a false detection or malfunction of the open phase failure detection device or a single failure.

上記目的を達成するため、本発明の実施形態による原子力発電所の非常用電源設備は、
外部電源系から電力を受電する第１受電変圧器、前記第１受電変圧器を介して外部電源系
と接続されるとともに、前記外部電源との接続を遮断可能な受電遮断器を含む第１非常用
母線、外部電源遮断時に前記第１非常用母線に給電する第１非常用ディーゼル発電機、を
有する第１非常用電源系統と、外部電源系から電力を受電する第２受電変圧器、前記第２
受電変圧器を介して外部電源系と接続されるとともに、前記外部電源との接続を遮断可能
な受電遮断器を含む第２非常用母線、外部電源遮断時に前記第２非常用母線に給電する第
２非常用ディーゼル発電機、を有する第２非常用電源系統と、前記第１受電変圧器の一次
側の三相交流電源の欠相を検知する第１欠相故障検知装置と、前記第２受電変圧器の一次
側の三相交流電源の欠相を検知する第２欠相故障検知装置と、を備えた原子力発電所の非
常用電源設備であって、前記第１欠相故障検知装置及び前記第２欠相故障検知装置の一方
のみが一次側の三相交流電源の欠相を検知した場合は第１非常用ディーゼル発電機および
第２非常用ディーゼル発電機が起動せず、前記第１欠相故障検知装置及び前記第２欠相故
障検知装置の両方が一次側の三相交流電源の欠相を検知した場合に、前記第１非常用母線
の受電遮断器と前記第２非常用母線の受電遮断器が作動して前記外部電源からの電力が遮
断されるとともに、前記第１非常用ディーゼル発電機および前記第２非常用ディーゼル発
電機の少なくとも何れかを起動するよう構成されたものである。 In order to achieve the above object, the emergency power supply equipment of a nuclear power plant according to the embodiment of the present invention is provided.
A first emergency including a first power receiving transformer that receives power from an external power supply system and a power receiving breaker that is connected to the external power supply system via the first power receiving transformer and can cut off the connection with the external power supply. A first emergency power supply system having a busbar and a first emergency diesel generator that supplies power to the first emergency busbar when the external power supply is cut off, and a second power receiving transformer that receives power from the external power supply system. 2
A second emergency bus including a power receiving breaker that is connected to an external power supply system via a power receiving transformer and can cut off the connection with the external power source, and a second emergency bus that supplies power to the second emergency bus when the external power supply is cut off. A second emergency power supply system having two emergency diesel generators, a first open phase failure detecting device for detecting a phase openness of a three-phase AC power source on the primary side of the first power receiving transformer, and the second power receiving device. An emergency power supply facility for a nuclear power plant equipped with a second open-phase failure detection device for detecting the open phase of a three-phase AC power supply on the primary side of a transformer, the first open-phase failure detection device and the above. If only one of the second open phase failure detection devices detects the open phase of the three-phase AC power supply on the primary side, the first emergency diesel generator and the second emergency diesel generator will not start, and the first missing phase will not start. When both the phase failure detection device and the second open phase failure detection device detect the open phase of the three-phase AC power supply on the primary side, the power receiving breaker of the first emergency bus and the second emergency bus The power receiving breaker is activated to cut off the power from the external power source, and at the same time, it is configured to start at least one of the first emergency diesel generator and the second emergency diesel generator. ..

また、本発明の実施形態による原子力発電所の非常用電源設備の制御方法は、外部電源
から電力を受電する受電変圧器と、受電遮断器を含む非常用母線と、外部電源遮断時に非
常用母線に給電する非常用ディーゼル発電機からなる非常用電源系統を複数備えるととも
に、前記受電変圧器のそれぞれ一次側の三相交流電源の欠相を検知する欠相故障検出手段
を有する原子力発電所の非常用電源設備の制御方法であって、前記欠相故障検出手段が、
複数の前記非常用電源系統のうち一部の前記非常用電源系統で欠相を検出した場合は前記
非常用ディーゼル発電機を起動せず、前記欠相故障検出手段が、複数の前記非常用電源系
統のすべての前記非常用電源系統で欠相を検出した場合は前記非常用ディーゼル発電機を
起動するものである。 Further, the control method of the emergency power supply equipment of the nuclear power plant according to the embodiment of the present invention includes a power receiving transformer that receives power from an external power source, an emergency bus including a power receiving breaker, and an emergency bus when the external power supply is cut off. An emergency nuclear power plant equipped with a plurality of emergency power supply systems consisting of an emergency diesel generator that supplies power to the power receiving transformer and also having a phase loss detecting means for detecting a phase loss of the three-phase AC power supply on the primary side of each of the power receiving transformers. A control method for power supply equipment, wherein the phase loss detecting means
When a phase loss is detected in some of the emergency power supply systems among the plurality of emergency power supply systems, the emergency diesel generator is not started, and the phase loss detection means uses the plurality of emergency power supplies. When a phase loss is detected in all the emergency power supply systems of the system, the emergency diesel generator is started.

また、本発明の実施形態による原子力発電所の非常用電源設備の制御装置は、外部電源
から電力を受電する受電変圧器、受電遮断器を含む非常用母線、外部電源遮断時に非常用
母線に給電する非常用ディーゼル発電機からなる複数の非常用電源系統と、前記受電変圧
器のそれぞれ一次側の三相交流電源の欠相を検知する欠相故障検出手段とを備える原子力
発電所の非常用電源設備の制御装置であって、前記欠相故障検出手段から欠相検出信号を
受信し、前記欠相故障検出手段が、複数の前記非常用電源系統のうち一部の前記非常用電
源系統で欠相を検出した場合は、前記受電遮断器の作動信号及び前記非常用ディーゼル発
電機の起動信号を送信せず、前記欠相故障検出手段が、複数の前記非常用電源系統のすべ
ての前記非常用電源系統で欠相を検出した場合は、前記非常用母線を前記受電変圧器と隔
離するように全機種電遮断器へ動作信号を送信するとともに、前記非常用ディーゼル発電
機に起動信号を送信するものである。 Further, the control device for the emergency power supply equipment of the nuclear power plant according to the embodiment of the present invention supplies power to the receiving transformer that receives power from the external power source, the emergency bus including the power receiving breaker, and the emergency bus when the external power is cut off. An emergency power supply for a nuclear power plant including a plurality of emergency power supply systems including emergency diesel generators and a phase openness failure detecting means for detecting an open phase of a three-phase AC power supply on the primary side of each of the power receiving transformers. A control device for equipment that receives a phase loss detection signal from the phase loss detection means, and the phase loss detection means is missing in a part of the emergency power supply systems among the plurality of emergency power supply systems. When the phase is detected, the operation signal of the power receiving breaker and the start signal of the emergency diesel generator are not transmitted, and the phase open failure detecting means is used for all the emergency power systems of the plurality of emergency power supply systems. When a phase loss is detected in the power supply system, an operation signal is transmitted to all models of power breakers so as to isolate the emergency bus from the power receiving transformer, and a start signal is transmitted to the emergency diesel generator. It is a thing.

本発明の実施形態によれば、非常用所内電源系に単相欠相の検知機器を導入した場合に
、検知機器の誤検知や誤動作に伴う不要な非常用ディーゼル発電機起動を抑制できる非常
用電源設備を提供することができる。 According to the embodiment of the present invention, when a single-phase open-phase detection device is introduced into the emergency power supply system, it is possible to suppress unnecessary emergency diesel generator startup due to false detection or malfunction of the detection device. Power supply equipment can be provided.

実施例１による非常用電源設備１０１の構成を説明する回路図。The circuit diagram explaining the structure of the emergency power supply equipment 101 according to Example 1. FIG. 実施例１による非常用電源設備１０１にかかるインターロックの構成図。The block diagram of the interlock concerning the emergency power supply equipment 101 according to Example 1. FIG. 実施例２による非常用電源設備１０１Ａの構成を説明する回路図。The circuit diagram explaining the structure of the emergency power supply equipment 101A according to Example 2. FIG. 実施例２による非常用電源設備１０１Ａにかかるインターロックの構成図。The block diagram of the interlock concerning the emergency power supply equipment 101A according to Example 2. FIG.

以下本発明の実施例について図面を参照しながら説明する。 Hereinafter, examples of the present invention will be described with reference to the drawings.

（実施例１）
本発明の実施例１に係る非常用電源設備１０１について、図１、図２を用いて説明する
。非常用電源設備１０１は、非常用電源系統を複数有して構成される。 (Example 1)
The emergency power supply facility 101 according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. The emergency power supply facility 101 is configured to have a plurality of emergency power supply systems.

図１は、原子力発電所に設置された非常用電源系統の構成を示す回路図である。非常用
電源系統を２系統図示しており、それぞれ同様の構成をしている。非常用電源系統は３系
統以上あっても構わない。 FIG. 1 is a circuit diagram showing the configuration of an emergency power supply system installed in a nuclear power plant. Two emergency power supply systems are shown, and each has the same configuration. There may be three or more emergency power supply systems.

非常用電源系統１００Ａ、１００Ｂはそれぞれ、外部電源（図示せず）からの受電変圧
器１Ａ、１Ｂ、受電変圧器１Ａ、１Ｂを介して外部電源から電力供給を受けてプラント事
故中に運転する補機等へ電力を供給する非常用母線２Ａ、２Ｂ、受電変圧器１Ａ、１Ｂと
非常用母線２Ａ、２Ｂ、の間に設けられた遮断器（受電遮断器）３Ａ、３Ｂ、非常用母線
２Ａ、２Ｂが外部電源からの電力供給を受けられない非常時に非常用母線２Ａ、２Ｂへ給
電するディーゼル発電機４Ａ、４Ｂ、非常用ディーゼル発電機と非常用母線２Ａ、２Ｂの
間に設けられた遮断器（受電遮断器）５Ａ、５Ｂ、そして受電変圧器１Ａ、１Ｂの１次側
に１台ずつ設置された欠相故障検知装置６Ａ、６Ｂを備えている。 The emergency power supply systems 100A and 100B are supplementary to operate during a plant accident by receiving power from an external power source via the power receiving transformers 1A and 1B and the power receiving transformers 1A and 1B, respectively, from an external power source (not shown). Emergency bus 2A, 2B, power receiving transformers 1A, 1B and breakers (power receiving breakers) 3A, 3B, emergency bus 2A, provided between the emergency bus 2A and 2B, which supply power to the machine, etc. Diesel generators 4A and 4B that supply power to emergency bus 2A and 2B in an emergency when 2B cannot receive power from an external power source, and a breaker provided between the emergency diesel generator and emergency bus 2A and 2B. (Power receiving breaker) 5A, 5B, and phase open failure detection devices 6A, 6B installed one by one on the primary side of the power receiving transformers 1A and 1B are provided.

通常時、すなわち外部電源から非常用母線２Ａ、２Ｂへ電力が供給されている状態では
、遮断器３Ａ、３Ｂは電気的に接続された「入」状態、遮断器５Ａ，５Ｂは電気的に遮断
された「切」状態とされている。 In normal times, that is, when power is being supplied from the external power supply to the emergency bus 2A and 2B, the circuit breakers 3A and 3B are in the electrically connected "on" state, and the circuit breakers 5A and 5B are electrically cut off. It is said to be in the "off" state.

また、原子力発電所の中央操作室（図示せず）には、欠相故障検知装置６Ａ、６Ｂが欠
相を検出すると警報を発報する機能が備えられている。 以下、非常用電源系統１００Ａ
、１００Ｂの両方、または非常用電源系統１００Ａ、１００Ｂのうち任意の１つを指す場
合にＡ、Ｂを付さずに非常用電源系統１００と記載する場合がある。他の構成についても
同様である。 Further, the central operation room (not shown) of the nuclear power plant is provided with a function of issuing an alarm when the phase open failure detection devices 6A and 6B detect the open phase. Below, the emergency power supply system 100A
, 100B, or any one of the emergency power supply systems 100A and 100B may be described as the emergency power supply system 100 without A and B. The same applies to other configurations.

図２を用いて、非常用電源設備１０１における欠相故障検知時の動作を説明する。図２
は非常用電源設備１０１に係るインターロックの構成図である。 The operation at the time of the phase loss failure detection in the emergency power supply equipment 101 will be described with reference to FIG. Figure 2
Is a block diagram of the interlock according to the emergency power supply facility 101.

欠相故障検知装置６Ａ、６Ｂが欠相を検知した際にＯＮになる条件をそれぞれ「欠相故
障検知装置６Ａが欠相を検出」９Ａ、「欠相故障検知装置６Ｂが欠相を検出」９Ｂとし、
ＯＮが入力された際に欠相故障検知装置６Ａ、６Ｂ自体の盤面並びに中央制御室に警報発
報する機能を「欠相故障検知装置６Ａ 警報発報」１０Ａ、「欠相故障検知装置６Ｂ 警
報発報」１０Ｂとする。また、条件９Ａ、９ＢのＡＮＤを１１、ＯＮが入力された際に遮
断器をトリップさせる（遮断器を「切」状態とする）機能を「遮断器３Ａ 切」１２Ａ、
「遮断器３Ｂ 切」１２Ｂとする。 The conditions for turning ON when the phase loss detection devices 6A and 6B detect a phase loss are "the phase loss detection device 6A detects the phase loss" 9A and "the phase loss detection device 6B detects the phase loss", respectively. 9B
When ON is input, the function to issue an alarm to the panel surface of the phase loss detection devices 6A and 6B itself and the central control room is "Phase failure detection device 6A alarm alarm" 10A, "Phase failure detection device 6B alarm". Notification ”10B. In addition, the function of tripping the circuit breaker (turning the circuit breaker to the "off" state) when ON is input for AND of conditions 9A and 9B is "Circuit breaker 3A off" 12A,
"Circuit breaker 3B off" 12B.

まず、非常用電源系統１００Ａにおいてのみ欠相が生じ、欠相故障検知装置６Ａが欠相
を検知した場合の動作について説明する。 First, the operation when a phase loss occurs only in the emergency power supply system 100A and the phase loss detection device 6A detects the phase loss will be described.

「欠相故障検知装置６Ａが欠相を検出」９Ａの出力信号は「欠相故障検知装置６Ａ 警
報発報」１０Ａに入力され、欠相故障検知装置６Ａの盤面並びに中央制御室に警報表示を
行う。一方、「欠相故障検知装置６Ｂが欠相を検出」９Ｂは出力されないため、「欠相故
障検知装置６Ｂ 警報発報」１０Ｂは動作しない。また、９Ａと９ＢのＡＮＤをとる符号
１１は、「欠相故障検知装置６Ｂが欠相を検出」９Ｂが出力されないため、動作せず、遮
断器３Ａ，３Ｂは「入」のままとなる。 The output signal of "Phase loss detection device 6A detects phase loss" 9A is input to "Phase failure detection device 6A alarm issuance" 10A, and an alarm is displayed on the panel surface of the phase loss detection device 6A and the central control room. Do. On the other hand, since the "phase open failure detection device 6B detects the open phase" 9B is not output, the "phase open failure detection device 6B alarm issuance" 10B does not operate. Further, the reference numeral 11 for ANDing 9A and 9B does not operate because "the open phase failure detection device 6B detects the open phase" 9B is not output, and the circuit breakers 3A and 3B remain "on".

ここで、非常用電源系統１００Ｂにおいてのみ欠相が生じた場合は、上述の説明におい
てＡとＢを読み替えた動作となる。 Here, when a phase open occurs only in the emergency power supply system 100B, A and B are replaced with each other in the above description.

次に、全ての外部電源系、すなわち本実施例における非常用電源系統１００Ａ、１００
Ｂの両方において欠相が生じ、欠相故障検知装置６Ａ、６Ｂが欠相検知した場合の作用に
ついて説明する。 Next, all external power supply systems, that is, emergency power supply systems 100A, 100 in this embodiment.
The operation when a phase loss occurs in both of B and the phase loss detection devices 6A and 6B detect the phase loss will be described.

「欠相故障検知装置６Ａが欠相を検出」９Ａの出力信号は「欠相故障検知装置６Ａ 警
報発報」１０Ａに入力され、欠相故障検知装置６Ａの盤面並びに中央制御室に警報表示を
行う。同様に、「欠相故障検知装置６Ｂが欠相を検出」９Ｂの出力信号は「欠相故障検知
装置６Ｂ 警報発報」１０Ｂに入力され、欠相故障検知装置６Ｂの盤面並びに中央制御室
に警報表示を行う。また、９Ａと９ＢのＡＮＤをとった符号１１がＯＮとなり、「遮断器
３Ａ 切」１２Ａ、「遮断器３Ｂ 切」１２Ｂが動作する。遮断器３Ａ、３Ｂがトリップ
すると、所内電源系のインターロックにより自動的に非常用ディーゼル発電機４Ａ、４Ｂ
が起動し、遮断器５Ａ、５Ｂが「入」状態とされ、外部電源系が隔離される。 The output signal of "Phase loss detection device 6A detects phase loss" 9A is input to "Phase failure detection device 6A alarm issuance" 10A, and an alarm is displayed on the panel surface of the phase loss detection device 6A and the central control room. Do. Similarly, the output signal of "Phase loss detection device 6B detects phase loss" 9B is input to "Phase failure detection device 6B alarm issuance" 10B, and is input to the board surface of the phase loss detection device 6B and the central control room. Display an alarm. Further, the reference numeral 11 obtained by ANDing 9A and 9B is turned ON, and the “circuit breaker 3A off” 12A and the “circuit breaker 3B off” 12B operate. When the circuit breakers 3A and 3B trip, the emergency diesel generators 4A and 4B are automatically locked by the interlock of the power supply system in the facility.
Is activated, the circuit breakers 5A and 5B are turned on, and the external power supply system is isolated.

ここで、非常用電源系統を３系統以上備える場合は、全ての非常用電源系統において欠
相が検出された場合に符号１１がＯＮとなるよう構成される。 Here, when three or more emergency power supply systems are provided, reference numeral 11 is set to turn ON when a phase loss is detected in all the emergency power supply systems.

また、非常用ディーゼル発電機４は基本的にはすべて起動するが、一部のみを起動する
制御を除外するものではない。 Further, although the emergency diesel generator 4 basically starts all, it does not exclude the control of starting only a part.

以上説明した本実施例の非常用電源設備１０１では、複数の非常用電源系統１００のうち
一部の系統が欠相となった状態においては、原子炉の安全を維持するのに必要な電源は残
りの健全な系統にて供給できることから警報発報にとどめる。そして、全ての外部電源系
にて欠相状態となった場合のみ非常用ディーゼル発電機を起動する。このような構成によ
り、非常用母線２への電力供給の信頼性を損なうことなく、健全系統存在時における非常
用ディーゼル発電機４の不要な起動を抑制することが可能となる。 In the emergency power supply equipment 101 of the present embodiment described above, in a state where some of the plurality of emergency power supply systems 100 are out of phase, the power supply required to maintain the safety of the reactor is Since it can be supplied by the remaining healthy system, only an alarm is issued. Then, the emergency diesel generator is started only when the phase is open in all the external power supply systems. With such a configuration, it is possible to suppress unnecessary start-up of the emergency diesel generator 4 in the presence of a healthy system without impairing the reliability of the power supply to the emergency bus 2.

また、通常時に複数の欠相故障検知装置６の一部について単一故障や誤動作が生じて欠相
検知信号を出力した場合であっても、警報発報を出力するだけにとどめるため、発電所に
与える影響を緩和することが可能となる。 Further, even if a single failure or malfunction occurs in a part of the plurality of open-phase failure detection devices 6 during normal operation and the open-phase detection signal is output, only an alarm is issued, so that the power plant is used. It is possible to mitigate the influence on.

（実施例２）
本発明の実施例２に係る非常用電源設備１０１Ａについて、図３、図４、図５、図６を
用いて説明する。なお、実施例１と同一の構成には同一の符号を付し、重複する説明は省
略する。非常用電源設備１０１Ａは、非常用電源系統を複数有して構成される。 (Example 2)
The emergency power supply facility 101A according to the second embodiment of the present invention will be described with reference to FIGS. 3, 4, 5, and 6. The same components as those in the first embodiment are designated by the same reference numerals, and duplicate description will be omitted. The emergency power supply facility 101A is configured to have a plurality of emergency power supply systems.

図３は、原子力発電所に設置された非常用電源系統の構成を示す回路図である。非常用
電源系統を２系統図示しており、それぞれ同様の構成をしている。非常用電源系統は３系
統以上あっても構わない。 FIG. 3 is a circuit diagram showing the configuration of an emergency power supply system installed in a nuclear power plant. Two emergency power supply systems are shown, and each has the same configuration. There may be three or more emergency power supply systems.

本実施例においては、非常用母線２Ａ、２Ｂを接続する母線連絡電路７と、この母線連
絡電路７に設けられた遮断器（母線連絡遮断器）８Ａ、８Ｂをさらに備えている。母線連
絡電路７上において、遮断器８Ａは非常用母線２Ａ側に、遮断器８Ｂは非常用母線２Ｂ側
に設けられている。この母線連絡電路７が設けられたことにより、非常用母線２Ａ、２Ｂ
はそれぞれの非常用電源系統１００Ａ，Ｂの受電変圧器１Ａ，１Ｂを介して給電されるだ
けでなく、他方の非常用電源系統１００から母線連絡電路７を介して給電を受けることが
可能である。例えば、遮断器３Ｂが「切」状態において、受電変圧器１Ａを介して外部電
源から非常用母線２Ａ、２Ｂの両方に給電を行うことが可能とされている。 In this embodiment, the bus connecting electric circuit 7 connecting the emergency bus 2A and 2B and the circuit breakers (bus bar connecting circuit breakers) 8A and 8B provided in the bus connecting electric circuit 7 are further provided. On the bus connecting electric circuit 7, the circuit breaker 8A is provided on the emergency bus 2A side, and the circuit breaker 8B is provided on the emergency bus 2B side. Due to the provision of this busbar connecting circuit 7, emergency busbars 2A and 2B
Is capable of receiving power not only from the power receiving transformers 1A and 1B of the respective emergency power supply systems 100A and B, but also from the other emergency power supply system 100 via the bus connecting electric circuit 7. .. For example, when the circuit breaker 3B is in the “off” state, it is possible to supply power to both the emergency bus 2A and 2B from the external power source via the power receiving transformer 1A.

遮断器８Ａ、８Ｂは、非常用母線２Ａ、２Ｂがそれぞれの非常用電源系統１００Ａ，Ｂ
の受電変圧器１Ａ，１Ｂから受電する場合は、少なくともどちらかが「切」状態とされる
。母線連絡電路７を介して非常用母線２の一方から他方へ給電される場合は、遮断器８Ａ
、８Ｂはともに「入」状態とされる。 In the circuit breakers 8A and 8B, the emergency busbars 2A and 2B are the emergency power supply systems 100A and B, respectively.
When receiving power from the receiving transformers 1A and 1B, at least one of them is in the "off" state. When power is supplied from one of the emergency bus 2 to the other via the bus 7, the circuit breaker 8A
, 8B are both in the "on" state.

図４を用いて、非常用電源設備１０１Ａにおける欠相故障検知時の動作を説明する。図
４は非常用電源設備１０１Ａに係るインターロックの構成図である。 The operation at the time of the phase loss failure detection in the emergency power supply equipment 101A will be described with reference to FIG. FIG. 4 is a configuration diagram of an interlock related to the emergency power supply facility 101A.

図４では、遮断器３Ａが切状態のときにＯＮとなる条件「遮断器３Ａ 切」１３Ａ、遮
断器３Ｂが切状態のときにＯＮとなる条件「遮断器３Ｂ 切」１３Ｂ、遮断器８Ａが切状
態のときにＯＮとなる条件「遮断器８Ａ 切」１４Ａ、遮断器８Ｂが切状態のときにＯＮ
となる条件「遮断器８Ｂ 切」１４Ｂを有する。 In FIG. 4, the condition "circuit breaker 3A off" 13A, which is turned on when the circuit breaker 3A is off, the condition "circuit breaker 3B off" 13B, which is turned on when the circuit breaker 3B is off, and the circuit breaker 8A are Condition to turn on when the circuit breaker is off "Circuit breaker 8A off" 14A, ON when the circuit breaker 8B is off
The condition "circuit breaker 8B off" 14B is provided.

符号９Ａと符号９ＢのＯＲを符号１５とするが、「遮断器３Ａ 切」１３Ａ、「遮断器
３Ｂ 切」１３ＢがそれぞれＯＮの場合は符号９Ａ、符号９Ｂはワイプアウト（ＷＯ）さ
れるため、符号１５への入力はＯＦＦとなる。すなわち、符号１５は、少なくともいずれ
かの非常用電源系統１００において遮断器３が「入」状態かつ欠相が検出された場合にＯ
Ｎとなる。 The OR of reference numeral 9A and reference numeral 9B is designated as reference numeral 15, but when "circuit breaker 3A off" 13A and "circuit breaker 3B off" 13B are ON, the reference numerals 9A and 9B are wiped out (WO). The input to reference numeral 15 is turned off. That is, reference numeral 15 is O when the circuit breaker 3 is in the “on” state and a phase open phase is detected in at least one of the emergency power supply systems 100.
It becomes N.

符号１４Ａ，１４ＢのＯＲを符号１６とし、符号１５と符号１６のＮＯＴ（符号２０）
のＡＮＤを１７、符号１６と符号９Ａ、９ＢのＡＮＤを符号１８とする。符号１７と符号
１８のＯＲを符号１９とする。ＯＮが入力されたときに遮断器３Ａをトリップする機能を
「遮断器３Ａ 切」２１、遮断器３Ｂをトリップする機能を「遮断器３Ｂ 切」２２、同
様にＯＮが入力されたときに遮断器８Ａをトリップする機能を「遮断器８Ａ 切」２３、
遮断器８Ｂをトリップする機能を「遮断器８Ｂ 切」２４とする。 The OR of reference numerals 14A and 14B is designated as reference numeral 16, and NOT (reference numeral 20) of reference numerals 15 and 16 is used.
The AND of the above is 17, and the AND of the reference numerals 16 and 9A and 9B is the reference numeral 18. Let the OR of reference numeral 17 and reference numeral 18 be reference numeral 19. The function of tripping the circuit breaker 3A when ON is input is "Circuit breaker 3A off" 21, the function of tripping the circuit breaker 3B is "Circuit breaker 3B off" 22, and similarly, the circuit breaker when ON is input. The function to trip 8A is "Circuit breaker 8A off" 23,
The function of tripping the circuit breaker 8B is referred to as "circuit breaker 8B off" 24.

以下、非常用母線２Ａ，２Ｂへの給電が、それぞれの系統の受電変圧器１Ａ、１Ｂから
行われる場合と、母線連絡電路７を用いて受電変圧器１の一方から行われる場合とに分け
て説明する。
（受電変圧器１Ａ、１Ｂから非常用母線２Ａ，２Ｂに給電） Hereinafter, power supply to the emergency bus 2A and 2B is divided into a case where power is supplied from the power receiving transformers 1A and 1B of the respective systems and a case where power is supplied from one of the power receiving transformers 1 using the bus connecting electric circuit 7. explain.
(Power is supplied from the receiving transformers 1A and 1B to the emergency buses 2A and 2B)

受電変圧器１Ａ、１Ｂから非常用母線２Ａ，２Ｂに給電される場合、通常時は遮断器８
Ａ、８Ｂの何れかは「切」状態とされる。このため、符号１６は必ずＯＮとなる。そして
、符号１７には符号２０からＯＦＦ（符号１６のＯＮのＮＯＴ）が入力されるため、符号
１７は必ずＯＦＦとなる。符号１８については、符号１６からの入力は必ずＯＮとなるた
め、符号９Ａ、９ＢからもＯＮが入力されると、符号１８もＯＮとなる。 When power is supplied from the receiving transformers 1A and 1B to the emergency busbars 2A and 2B, the circuit breaker 8 is normally used.
Either A or 8B is in the "off" state. Therefore, reference numeral 16 is always ON. Then, since OFF (ON NOT of reference numeral 16) is input to reference numeral 17, reference numeral 17 is always OFF. As for reference numeral 18, since the input from reference numeral 16 is always ON, when ON is also input from reference numerals 9A and 9B, reference numeral 18 is also turned ON.

すなわち、欠相故障検知装置６Ａ、６Ｂの両方で欠相が検出された場合に限り、符号１
８がＯＮとなり、符号１９もＯＮとなる。そして、遮断器３Ａ、Ｂは「切」状態となり、
遮断器８Ａ、８Ｂのうち一方が「入」状態だった場合はそれも「切」状態となる。そして
、所内電源系のインターロックにより自動的に非常用ディーゼル発電機４Ａ、４Ｂが起動
し、遮断器５Ａ、５Ｂが「入」状態とされ、外部電源系が隔離される。
（受電変圧器１Ａから非常用母線２Ａ，２Ｂ両方に給電） That is, reference numeral 1 is limited to the case where the open phase is detected by both the open phase failure detection devices 6A and 6B.
8 is ON, and reference numeral 19 is also ON. Then, the circuit breakers 3A and B are in the "off" state.
If one of the circuit breakers 8A and 8B is in the "on" state, it is also in the "off" state. Then, the emergency diesel generators 4A and 4B are automatically started by the interlock of the internal power supply system, the circuit breakers 5A and 5B are turned on, and the external power supply system is isolated.
(Power is supplied from the receiving transformer 1A to both the emergency bus 2A and 2B)

受電変圧器１Ａから非常用母線２Ａ，２Ｂ両方に給電される場合、通常時は、遮断器３
Ａ、８Ａ、８Ｂは「入」状態、遮断器３Ｂは「切」状態である。 When power is supplied from the receiving transformer 1A to both the emergency bus 2A and 2B, the circuit breaker 3 is normally used.
A, 8A and 8B are in the "on" state, and the circuit breaker 3B is in the "off" state.

欠相故障検知装置６Ｂが欠相を検知した場合、遮断器３Ｂが「切」のため、符号１５へ
の入力はＯＦＦとなる。すなわち、符号１５は欠相故障検知装置６Ａが欠相を検知して符
号９ＡからＯＮが入力された場合のみにＯＮとなる。 When the phase loss detection device 6B detects a phase loss, the input to the reference numeral 15 is turned off because the circuit breaker 3B is “off”. That is, the reference numeral 15 is turned ON only when the phase loss detecting device 6A detects the phase loss and ON is input from the reference numeral 9A.

遮断器８Ａ、８Ｂは「入」状態のため、符号１６はＯＦＦとなる。そして、符号２０か
ら符号１７へはＯＮが入力される。一方で、符号１８は、符号１６からＯＦＦが入力され
るため、ＯＮとならない。 Since the circuit breakers 8A and 8B are in the "ON" state, reference numeral 16 is OFF. Then, ON is input from reference numeral 20 to reference numeral 17. On the other hand, reference numeral 18 is not turned on because OFF is input from reference numeral 16.

以上から、欠相故障検知装置６Ａが欠相を検知すると符号１７、符号１９がＯＮとなり
、遮断器遮断器３Ａ、遮断器８Ａ、８Ｂが「切」状態となる。そして、所内電源系のイン
ターロックにより自動的に非常用ディーゼル発電機４Ａ、４Ｂが起動し、遮断器５Ａ、５
Ｂが「入」状態とされ、外部電源系が隔離される。一方で、欠相故障検知装置６Ｂによる
欠相の検知からは影響を受けない。 From the above, when the phase loss detection device 6A detects the phase loss, reference numerals 17 and 19 are turned on, and the circuit breaker breaker 3A, circuit breaker 8A, and 8B are in the “off” state. Then, the emergency diesel generators 4A and 4B are automatically started by the interlock of the power supply system in the facility, and the circuit breakers 5A and 5
B is put into the "on" state and the external power supply system is isolated. On the other hand, it is not affected by the phase loss detection by the phase loss detection device 6B.

受電変圧器１Ｂから非常用母線２Ａ，２Ｂ両方に給電される場合は、上述の説明におい
て遮断器３、欠相故障検知装置６のＡとＢを読み替えた動作となる。 When power is supplied from the power receiving transformer 1B to both the emergency bus 2A and 2B, the operations A and B of the circuit breaker 3 and the phase loss detection device 6 are replaced in the above description.

以上説明した本実施例の非常用電源設備１０１Ａでは、欠相により外部電源から非常用
母線２への給電機能が喪失された場合には確実にディーゼル発電機４の起動を行う一方で
、外部電源から非常用母線２への給電に影響ない欠相故障検知装置６の欠相検出（単一故
障、誤動作等）信号によってはディーゼル発電機４を起動しない。このような構成により
、非常用母線２への電力供給の信頼性を損なうことなく、健全系統存在時における非常用
ディーゼル発電機４の不要な起動を抑制することが可能となる。 In the emergency power supply equipment 101A of the present embodiment described above, when the power supply function from the external power supply to the emergency bus 2 is lost due to phase loss, the diesel generator 4 is surely started, while the external power supply is used. The diesel generator 4 is not started depending on the phase loss detection (single failure, malfunction, etc.) signal of the phase loss detection device 6 that does not affect the power supply from the emergency bus 2. With such a configuration, it is possible to suppress unnecessary start-up of the emergency diesel generator 4 in the presence of a healthy system without impairing the reliability of the power supply to the emergency bus 2.

ここで、非常用電源系統１００を３系統以上備える場合は、非常用母線２のそれぞれに
各系統の受電変圧器１から給電する場合は、全ての欠相故障検知装置６が欠相を検出した
場合に、外部電源系を隔離して非常用ディーゼル発電機４を起動する構成とする。また、
何れかの受電変圧器１から複数の非常用母線２に給電する場合は、母線連絡電路７を介し
て給電を受けている非常用電源系統１００の欠相故障検知装置６の欠相検出の有無には影
響を受けず、母線連絡電路７を介して給電を受けている非常用電源系統１００以外の非常
用電源系統１００の欠相故障検知装置６の全てが欠相を検出した場合に、外部電源系を隔
離して非常用ディーゼル発電機４を起動する構成とする。例えば、受電変圧器１Ａから非
常用母線２Ａ、２Ｂ、２Ｃに給電する場合は、欠相故障検知装置６Ａの欠相検出によって
のみ外部電源系の隔離、ディーゼル発電機の起動を行う。また、受電変圧器１Ａから非常
用母線２Ａに、受電変圧器１Ｂから非常用母線２Ｂ、２Ｃに給電を行う場合は、欠相故障
検知装置６Ａ、６Ｂの両方が欠相を検出した場合に外部電源系の隔離、ディーゼル発電機
の起動を行う。 Here, when three or more emergency power supply systems 100 are provided, and when power is supplied to each of the emergency bus 2 from the power receiving transformer 1 of each system, all the open phase failure detection devices 6 have detected the open phase. In this case, the external power supply system is isolated to start the emergency diesel generator 4. Also,
When power is supplied from any of the receiving transformers 1 to a plurality of emergency bus 2s, presence / absence of phase loss detection of the phase loss detection device 6 of the emergency power system 100 receiving power via the bus connection line 7. When all of the phase openness failure detection devices 6 of the emergency power supply system 100 other than the emergency power supply system 100, which are supplied with power via the bus connecting electric circuit 7, all detect the open phase, the external The power system is isolated to start the emergency diesel generator 4. For example, when power is supplied from the power receiving transformer 1A to the emergency bus 2A, 2B, and 2C, the external power supply system is isolated and the diesel generator is started only by the phase loss detection of the phase loss detection device 6A. Further, when power is supplied from the power receiving transformer 1A to the emergency bus 2A and from the power receiving transformer 1B to the emergency bus 2B and 2C, it is external when both the phase loss detection devices 6A and 6B detect the phase loss. Isolate the power supply system and start the diesel generator.

以上、本発明のいくつかの実施形態を説明した。上述した機能は、例えば原子力発電所
に設置され、各欠相故障検出装置の検知信号を含む原子力発電所の各種信号を受信し、各
遮断器や各ディーゼル発電機に動作信号を送信する制御盤（制御装置）に、インターロッ
クとして実装することで実現される。 The embodiments of the present invention have been described above. The above-mentioned function is installed in a nuclear power plant, for example, and is a control panel that receives various signals of the nuclear power plant including the detection signal of each open phase failure detection device and transmits an operation signal to each breaker and each diesel generator. It is realized by mounting it as an interlock on the (control device).

また、これらの実施形態は、例として提示したものであり、発明の範囲を限定すること
は意図していない。これら新規な実施形態は、その他の様々な形態で実施されることが可
能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことがで
きる。これら実施形態やその変形は、発明の範囲や要旨に含まれるとともに、特許請求の
範囲に記載された発明とその均等の範囲に含まれる。 Moreover, these embodiments are presented as an example, and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

１０１…非常用電源設備、１００Ａ，１００Ｂ…非常用電源系統、１Ａ，１Ｂ…受電変圧
器、２Ａ，２Ｂ…非常用母線、３Ａ，３Ｂ，５Ａ，５Ｂ，８Ａ，８Ｂ…遮断器、４Ａ，４
Ｂ…ディーゼル発電機、６Ａ，６Ｂ…欠相故障検出装置、７…母線連絡電路 101 ... Emergency power supply equipment, 100A, 100B ... Emergency power supply system, 1A, 1B ... Power receiving transformer, 2A, 2B ... Emergency bus, 3A, 3B, 5A, 5B, 8A, 8B ... Circuit breaker, 4A, 4
B ... Diesel generator, 6A, 6B ... Open phase failure detector, 7 ... Bus connection electric circuit

Claims (4)

外部電源系から電力を受電する第１受電変圧器、
前記第１受電変圧器を介して外部電源系と接続されるとともに、前記外部電源との接続を
遮断可能な受電遮断器を含む第１非常用母線、
外部電源遮断時に前記第１非常用母線に給電する第１非常用ディーゼル発電機、を有する
第１非常用電源系統と、
外部電源系から電力を受電する第２受電変圧器、
前記第２受電変圧器を介して外部電源系と接続されるとともに、前記外部電源との接続を
遮断可能な受電遮断器を含む第２非常用母線、
外部電源遮断時に前記第２非常用母線に給電する第２非常用ディーゼル発電機、を有する
第２非常用電源系統と、
前記第１受電変圧器の一次側の三相交流電源の欠相を検知する第１欠相故障検知装置と、
前記第２受電変圧器の一次側の三相交流電源の欠相を検知する第２欠相故障検知装置と、
を備えた原子力発電所の非常用電源設備であって、
前記第１欠相故障検知装置及び前記第２欠相故障検知装置の一方のみが一次側の三相交流
電源の欠相を検知した場合は第１非常用ディーゼル発電機および第２非常用ディーゼル発
電機が起動せず、
前記第１欠相故障検知装置及び前記第２欠相故障検知装置の両方が一次側の三相交流電源
の欠相を検知した場合に、前記第１非常用母線の受電遮断器と前記第２非常用母線の受電
遮断器が作動して前記外部電源からの電力が遮断されるとともに、前記第１非常用ディー
ゼル発電機および前記第２非常用ディーゼル発電機の少なくとも何れかを起動するよう構
成された、原子力発電所の非常用電源設備。 The first power receiving transformer that receives power from the external power supply system,
A first emergency bus including a power receiving circuit breaker that is connected to an external power supply system via the first power receiving transformer and can cut off the connection with the external power supply.
A first emergency power supply system having a first emergency diesel generator that supplies power to the first emergency bus when the external power supply is cut off.
Second power receiving transformer that receives power from the external power supply system,
A second emergency bus that includes a power receiving circuit breaker that is connected to the external power supply system via the second power receiving transformer and can cut off the connection with the external power supply.
A second emergency power supply system having a second emergency diesel generator that supplies power to the second emergency bus when the external power supply is cut off.
The first phase open failure detection device that detects the open phase of the three-phase AC power supply on the primary side of the first power receiving transformer, and
A second open phase failure detection device that detects the open phase of the three-phase AC power supply on the primary side of the second power receiving transformer, and
It is an emergency power supply facility of a nuclear power plant equipped with
When only one of the first open phase failure detection device and the second open phase failure detection device detects the open phase of the three-phase AC power supply on the primary side, the first emergency diesel generator and the second emergency diesel power generation The machine did not start,
When both the first open phase failure detection device and the second open phase failure detection device detect the open phase of the three-phase AC power supply on the primary side, the power receiving circuit breaker of the first emergency bus and the second The power receiving circuit breaker of the emergency bus is activated to cut off the power from the external power source, and at the same time, it is configured to start at least one of the first emergency diesel generator and the second emergency diesel generator. Also, emergency power supply equipment for nuclear power plants. 外部電源系から電力を受電する第１受電変圧器、
前記第１受電変圧器を介して外部電源系と接続されるとともに、前記外部電源との接続を
遮断可能な受電遮断器を含む第１非常用母線、
外部電源遮断時に前記第１非常用母線に給電する第１非常用ディーゼル発電機、を有する
第１非常用電源系統と、
外部電源系から電力を受電する第２受電変圧器、
前記第２受電変圧器を介して外部電源系と接続されるとともに、前記外部電源との接続を
遮断可能な受電遮断器を含む第２非常用母線、
外部電源遮断時に前記第２非常用母線に給電する第２非常用ディーゼル発電機、を有する
第２非常用電源系統と、
前記第１受電変圧器の一次側の三相交流電源の欠相を検知する第１欠相故障検知装置と、
前記第２受電変圧器の一次側の三相交流電源の欠相を検知する第２欠相故障検知装置と、
前記第１非常用母線と前記第２非常用母線を連絡する母線連絡電路と、
前記母線連絡電路上に設けられた母線連絡用遮断器を備え、
前記第１受電変圧器から前記第１非常用母線および前記母線連絡電路を介して前記第２
非常用母線に給電可能に構成された原子力発電所の非常用電源設備であって、
前記前記第１受電変圧器から前記第２非常用母線に給電している場合において、前記第
２欠相故障検知装置が欠相を検知した場合には第１非常用ディーゼル発電機および第２非
常用ディーゼル発電機が起動せず、かつ、
前記第１欠相故障検知装置が欠相を検知した場合には第１非常用ディーゼル発電機およ
び第２非常用ディーゼル発電機の少なくとも何れかを起動するよう構成された、原子力発
電所の非常用電源設備。 The first power receiving transformer that receives power from the external power supply system,
A first emergency bus including a power receiving circuit breaker that is connected to an external power supply system via the first power receiving transformer and can cut off the connection with the external power supply.
A first emergency power supply system having a first emergency diesel generator that supplies power to the first emergency bus when the external power supply is cut off.
Second power receiving transformer that receives power from the external power supply system,
A second emergency bus that includes a power receiving circuit breaker that is connected to the external power supply system via the second power receiving transformer and can cut off the connection with the external power supply.
A second emergency power supply system having a second emergency diesel generator that supplies power to the second emergency bus when the external power supply is cut off.
The first phase open failure detection device that detects the open phase of the three-phase AC power supply on the primary side of the first power receiving transformer, and
A second open phase failure detection device that detects the open phase of the three-phase AC power supply on the primary side of the second power receiving transformer, and
A bus connecting electric circuit connecting the first emergency bus and the second emergency bus,
A circuit breaker for busbar communication provided on the busbar communication circuit is provided.
The second from the first power receiving transformer via the first emergency bus and the bus connecting electric circuit.
It is an emergency power supply facility of a nuclear power plant that can supply power to the emergency bus.
When power is being supplied from the first power receiving transformer to the second emergency bus, and the second open phase failure detection device detects a phase open, the first emergency diesel generator and the second emergency Diesel generator does not start and
When the first phase open failure detection device detects a phase open, at least one of the first emergency diesel generator and the second emergency diesel generator is started. Power supply equipment. 外部電源から電力を受電する受電変圧器と、受電遮断器を含む非常用母線と、外部電源
遮断時に非常用母線に給電する非常用ディーゼル発電機からなる非常用電源系統を複数備
えるとともに、前記受電変圧器のそれぞれ一次側の三相交流電源の欠相を検知する欠相故
障検出手段を有する原子力発電所の非常用電源設備の制御方法であって、
前記欠相故障検出手段が、複数の前記非常用電源系統のうち一部の前記非常用電源系統
で欠相を検出した場合は前記非常用ディーゼル発電機を起動せず、
前記欠相故障検出手段が、複数の前記非常用電源系統のすべての前記非常用電源系統で
欠相を検出した場合は前記非常用ディーゼル発電機を起動する、原子力発電所の非常用電
源設備の制御方法。 It is equipped with a plurality of emergency power supply systems consisting of a power receiving transformer that receives power from an external power source, an emergency bus including a power receiving circuit breaker, and an emergency diesel generator that supplies power to the emergency bus when the external power is cut off. It is a control method for emergency power supply equipment of a nuclear power plant that has a phase open failure detection means for detecting the open phase of the three-phase AC power supply on each primary side of the transformer.
When the phase open failure detecting means detects a phase open in some of the emergency power supply systems among the plurality of emergency power supply systems, the emergency diesel generator is not started.
When the phase open failure detecting means detects a phase open in all the emergency power supply systems of the plurality of emergency power supply systems, the emergency diesel generator is started, and the emergency power supply equipment of the nuclear power plant. Control method. 外部電源から電力を受電する受電変圧器、受電遮断器を含む非常用母線、外部電源遮断
時に非常用母線に給電する非常用ディーゼル発電機からなる複数の非常用電源系統と、前
記受電変圧器のそれぞれ一次側の三相交流電源の欠相を検知する欠相故障検出手段とを備
える原子力発電所の非常用電源設備の制御装置であって、
前記欠相故障検出手段から欠相検出信号を受信し、
前記欠相故障検出手段が、複数の前記非常用電源系統のうち一部の前記非常用電源系統
で欠相を検出した場合は、前記受電遮断器の作動信号及び前記非常用ディーゼル発電機の
起動信号を送信せず、
前記欠相故障検出手段が、複数の前記非常用電源系統のすべての前記非常用電源系統で
欠相を検出した場合は、前記非常用母線を前記受電変圧器と隔離するように全機種電遮断
器へ動作信号を送信するとともに、前記非常用ディーゼル発電機に起動信号を送信する、
原子力発電所の非常用電源設備の制御装置。 A plurality of emergency power supply systems consisting of a power receiving transformer that receives power from an external power source, an emergency bus including a power receiving circuit breaker, and an emergency diesel generator that supplies power to the emergency bus when the external power supply is cut off, and the power receiving transformer. It is a control device for emergency power supply equipment of a nuclear power plant, each equipped with a phase loss detecting means for detecting a phase loss of a three-phase AC power supply on the primary side.
Upon receiving the phase loss detection signal from the phase loss detection means,
When the phase open failure detecting means detects a phase open in some of the emergency power supply systems among the plurality of emergency power supply systems, the operation signal of the power receiving circuit breaker and the activation of the emergency diesel generator are started. Without sending a signal
When the phase loss detecting means detects a phase loss in all the emergency power supply systems of the plurality of emergency power supply systems, all models are cut off so as to isolate the emergency bus from the power receiving transformer. A start signal is transmitted to the emergency diesel generator while transmitting an operation signal to the device.
Control device for emergency power supply equipment of nuclear power plants.
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