JP2000278856A - Protective relay device - Google Patents
Protective relay deviceInfo
- Publication number
- JP2000278856A JP2000278856A JP11078344A JP7834499A JP2000278856A JP 2000278856 A JP2000278856 A JP 2000278856A JP 11078344 A JP11078344 A JP 11078344A JP 7834499 A JP7834499 A JP 7834499A JP 2000278856 A JP2000278856 A JP 2000278856A
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- Prior art keywords
- circuit
- phase
- ground fault
- output
- detecting
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、保護リレー装置に
かかり、特に、地絡過渡応答による誤動作を防止して、
電力系統に発生した短絡事故と地絡事故とを確実に判別
できる保護リレー装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protection relay device, and more particularly, to preventing a malfunction due to a ground fault transient response.
The present invention relates to a protection relay device that can reliably determine a short circuit accident and a ground fault accident that have occurred in an electric power system.
【０００２】[0002]
【従来の技術】図５は誘導成分および容量成分の十分小
さい系統、すなわちケーブルを含まない系統における従
来の地絡および短絡事故を検出する保護リレー装置を説
明する図である。図において（ａ）は誘導成分および容
量成分の十分小さい系統を示す単線結線図、（ｂ）は１
線地絡時の地絡事故ベクトル図、（ｃ）は２線短絡時の
短絡事故ベクトル図、（ｄ）は不足電圧リレーの特性
図、（ｅ）は地絡事故および短絡事故の別を判定する地
絡および短絡判定回路である。2. Description of the Related Art FIG. 5 is a diagram for explaining a conventional protection relay device for detecting a ground fault and a short circuit fault in a system having sufficiently small inductive components and capacitive components, that is, a system not including a cable. In the figure, (a) is a single-line diagram showing a system having sufficiently small induction components and capacitance components, and (b) is a single-line diagram.
Ground fault accident vector diagram at line ground fault, (c) Short circuit accident vector diagram at two wire short circuit, (d) Characteristic diagram of undervoltage relay, (e) Judgment of ground fault accident and short circuit accident Circuit for determining a ground fault and a short circuit.
【０００３】これらの図において、ｅは三相交流電源、
Ｒは中性点接地抵抗、Ｔｒ1およびＴｒ2は変圧器、Ｖa
はＡ相電圧、ＶbはＢ相電圧、ＶcはＣ相電圧である。In these figures, e is a three-phase AC power supply,
R is the neutral point ground resistance, Tr1 and Tr2 are transformers, Va
Is an A-phase voltage, Vb is a B-phase voltage, and Vc is a C-phase voltage.
【０００４】Ｒy1は方向距離リレーなどの短絡検出リレ
ー、Ｒy2は方向地絡リレーなどの地絡検出リレー、Ｒy3
は線間電圧で作動する不足電圧リレー、ＡＮＤ1、ＡＮ
Ｄ2はそれぞれ論理積回路である。[0004] Ry1 is a short-circuit detection relay such as a directional distance relay, Ry2 is a ground fault detection relay such as a directional ground fault relay, and Ry3.
Are undervoltage relays operated by line voltage, AND1, AN
D2 is a logical product circuit.
【０００５】１線地絡時の地絡事故ベクトル図、および
２線短絡時の短絡事故ベクトル図に示すように、誘導成
分および容量成分の十分小さい系統において、短絡事故
時に線間電圧が低下するが、地絡事故時に線間電圧が低
下することはない。As shown in the ground fault vector diagram at the time of one-line ground fault and the short-circuit fault vector diagram at the time of two-wire short-circuit, in a system having sufficiently small inductive component and capacitive component, the line voltage decreases at the time of the short-circuit fault. However, the line voltage does not decrease during a ground fault.
【０００６】したがって、図（ｅ）に示すように短絡検
出リレーＲy1および不足電圧リレーＲy3の各出力の論理
積を論理積回路ＡＮＤ1でとると、不足電圧時のみ短絡
検出リレーＲy1の出力を得ることができ、誤って短絡遮
断することを防止することができる。また、絡検出リレ
ーＲy2および不足電圧リレーＲy3の否定出力の論理積を
論理積回路ＡＮＤ2でとると、不足電圧でないときのみ
地絡検出リレーＲy2の出力を得ることができ、誤って地
絡遮断することを防止することができる。Accordingly, as shown in FIG. 1E, when the logical product of the outputs of the short-circuit detection relay Ry1 and the undervoltage relay Ry3 is obtained by the AND circuit AND1, the output of the short-circuit detection relay Ry1 is obtained only when the undervoltage occurs. Can be prevented from being erroneously short-circuited. Also, if the logical product of the negative outputs of the short-circuit detection relay Ry2 and the undervoltage relay Ry3 is taken by the AND circuit AND2, the output of the ground-fault detection relay Ry2 can be obtained only when there is no undervoltage, and the ground fault is cut off erroneously. Can be prevented.
【０００７】[0007]
【発明が解決しようとする課題】図６は誘導成分および
容量成分の十分小さい系統、すなわちケーブルを含まな
い架空線系統と誘導成分および容量成分の大きい系統、
すなわちケーブルを含む系統における１線地絡事故時の
ベクトル図を対比して説明する図であり、図（ａ）はケ
ーブルを含まない系統における系統図および１線地絡事
故時のベクトル図、図（ｂ）ケーブルを含む系統におけ
る系統図および１線地絡事故時のベクトル図である。FIG. 6 shows a system having sufficiently small inductive and capacitive components, that is, an overhead line system not including a cable and a system having large inductive and capacitive components.
That is, FIG. 3A is a diagram for explaining in comparison with a vector diagram at the time of a one-line ground fault in a system including a cable, and FIG. (B) It is a system diagram in a system including a cable and a vector diagram at the time of a one-line ground fault.
【０００８】図においてＣはケーブルの対地容量、Ｌは
中性点接地リアクトルである。なお、図において図５に
示される部分と同一部分については同一符号を付してそ
の説明を省略する。In the figure, C is a ground capacity of the cable, and L is a neutral grounding reactor. In the figure, the same portions as those shown in FIG. 5 are denoted by the same reference numerals, and description thereof will be omitted.
【０００９】図（ｂ）のベクトル図に示すようにケーブ
ルを含む系統は、ケーブルを含まない系統とは異なり、
地絡事故であるにも関わらず過渡応答により線間電圧
（図の場合はＶab）が大幅に低下する。As shown in the vector diagram of FIG. 2B, a system including a cable is different from a system not including a cable.
In spite of the ground fault, the line voltage (Vab in the figure) drops significantly due to the transient response.
【００１０】すなわち、前記従来の不足電圧リレーＲy3
を用いた地絡および短絡判定回路はケーブルを含む系統
においては、地絡事故が発生しているにも関わらず線間
電圧が低下するため、地絡事故を短絡事故と誤って判定
する可能性がある。That is, the conventional undervoltage relay Ry3
In a system including a cable, the line voltage drops even though a ground fault has occurred in a system including a cable. There is.
【００１１】ところで、電力用ケーブルは心線を絶縁物
で強固の被覆しているため、２本の電力用ケーブル間に
短絡事故が発生することはきわめて希である。したがっ
て、従来の保護リレー装置においては、短絡事故を検出
したとき短絡事故の発生地点は系統におけるケーブル区
間ではなく架空線区間であると判断し、事故発生時に遮
断器を開路して事故電流を遮断した後、遮断器を再投入
して送電を継続して運用する方式（再閉路方式）が採用
されている。By the way, since a power cable has a core wire firmly covered with an insulator, a short circuit accident between two power cables rarely occurs. Therefore, in the conventional protection relay device, when a short-circuit accident is detected, it is determined that the point of occurrence of the short-circuit is not the cable section in the system but the overhead line section, and the circuit breaker is opened to cut off the fault current when the fault occurs. After that, a system (re-closing system) in which the circuit breaker is turned on again to continuously operate the power transmission (re-closing system) is employed.
【００１２】一方、電力用ケーブルは地絡事故を発生す
る可能性があり、電力用ケーブルに発生した地絡事故は
自然に回復することはあり得ない。On the other hand, the power cable may cause a ground fault, and the ground fault occurring in the power cable cannot be naturally recovered.
【００１３】したがって、実際に発生した事故が短絡事
故ではなく地絡事故であった場合に、これを短絡事故と
誤判別し、再閉路を行うと地絡事故点の損傷を拡大する
ことになる。Therefore, if the accident actually occurred is not a short-circuit accident but a ground-fault accident, the accident is erroneously determined to be a short-circuit accident, and if re-closing is performed, the damage at the point of the ground-fault accident is enlarged. .
【００１４】本発明は前記問題点に鑑みてなされたもの
で、地絡事故時に過渡応答により線間電圧が低下した場
合においても地絡事故の判別が可能であり、誤って短絡
事故と判断することを防止できる保護リレー装置を提供
するものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is possible to determine a ground fault even when a line voltage is reduced due to a transient response at the time of a ground fault, and to erroneously determine that a short circuit has occurred. The purpose of the present invention is to provide a protection relay device that can prevent such a situation.
【００１５】[0015]
【課題を解決するための手段】本発明は、上記の課題を
解決するために次のような手段を採用した。The present invention employs the following means in order to solve the above-mentioned problems.
【００１６】三相送電系統の地絡事故を検出する保護リ
レー装置において、第１相および第２相間の相間電圧が
第１の所定値以上であることを検出する第１の電圧検出
リレーと、前記第１相および第２相の相電圧がそれぞれ
第２の所定値以上であることを検出する第２および第３
の電圧検出リレーと、前記第１，第２および第３の電圧
検出リレーの検出出力の論理積を得る論理回路からな
り、該論理積回路出力に基づき前記三相送電系統の地絡
事故を検出することを特徴とする。A protection relay device for detecting a ground fault in a three-phase power transmission system, comprising: a first voltage detection relay for detecting that an inter-phase voltage between a first phase and a second phase is equal to or greater than a first predetermined value; A second and a third phase detector for detecting that the phase voltages of the first phase and the second phase are respectively equal to or more than a second predetermined value;
And a logic circuit for obtaining a logical product of detection outputs of the first, second and third voltage detection relays, and detecting a ground fault in the three-phase power transmission system based on the logical product circuit output. It is characterized by doing.
【００１７】また、前記保護リレー装置において、前記
保護リレー装置は各相毎に前記第１，第２および第３の
電圧検出リレーおよび第１，第２および第３の電圧検出
リレーの検出出力の論理積を得る論理積回路並びに該論
理積回路の出力の論理和を得る論理和回路を備え、該論
理和回路出力に基づき前記三相送電系統の地絡事故を検
出することを特徴とする。[0017] In the protection relay device, the protection relay device may output detection outputs of the first, second, and third voltage detection relays and the first, second, and third voltage detection relays for each phase. A logical product circuit for obtaining a logical product and a logical sum circuit for obtaining a logical sum of outputs of the logical product circuit are provided, and a ground fault of the three-phase power transmission system is detected based on the output of the logical sum circuit.
【００１８】また、前記保護リレー装置において、前記
保護リレー装置はさらに地絡検出リレーを備え、該地絡
検出リレーの検出出力と、前記論理積回路出力の論理積
出力により地絡事故を検出することを特徴とする。Further, in the protection relay device, the protection relay device further includes a ground fault detection relay, and detects a ground fault accident by a logical product output of the detection output of the ground fault detection relay and the output of the logical product circuit. It is characterized by the following.
【００１９】また、前記保護リレー装置において、前記
保護リレー装置はさらに短絡検出リレーを備え、該短絡
検出リレーの検出出力と、前記論理積回路出力の否定出
力との論理積出力により短絡事故を検出することを特徴
とする。Further, in the protection relay device, the protection relay device further includes a short-circuit detection relay, and detects a short-circuit accident by a logical product output of a detection output of the short-circuit detection relay and a negative output of the logical product circuit output. It is characterized by doing.
【００２０】[0020]
【発明の実施の形態】図１は本発明を適用することがで
きるケーブルを含む三相交流送電線の単線結線図であ
る。図において、１１および１２は三相交流電源、１３
は三相交流電源１１および１２を接続する送電線であ
り、Ａ端子およびＢ端子はそれぞれ電源端子を示す。FIG. 1 is a single-line diagram of a three-phase AC transmission line including a cable to which the present invention can be applied. In the figure, 11 and 12 are three-phase AC power supplies, 13
Is a transmission line connecting the three-phase AC power supplies 11 and 12, and the A terminal and the B terminal represent power supply terminals, respectively.
【００２１】１４および１５はそれぞれＡ端子およびＢ
端子側の送電線に接続した計器変流器、１６および１７
はそれぞれＡ端子およびＢ端子側の送電線に接続した回
路遮断器、１８，１９はそれぞれＡ端子およびＢ端子側
の送電線に接続した変成器（計器用変圧器）、２０，２
１はそれぞれＡ端子およびＢ端子側に配置した、例えば
方向距離リレー、方向地絡リレーなどの保護リレー装置
であり、各回線毎に設けてある。回線毎に設けた端子Ａ
側の保護リレー装置２０は変流器１４および変成器１８
から送電系統の電流および電圧並びに端子Ｂ側に配置し
た保護リレー装置２１の保護出力を取り込み、例えば送
電線１３に事故が発生した場合には回路遮断器１６をト
リップ（開路）する。14 and 15 are A terminal and B terminal, respectively.
Meter current transformers connected to terminal side power lines, 16 and 17
Are circuit breakers connected to the transmission lines on the A and B terminals, respectively, and 18 and 19 are transformers (instrument transformers) connected to the transmission lines on the A and B terminals, respectively.
Reference numeral 1 denotes protection relay devices, such as directional distance relays and directional ground fault relays, which are disposed on the A terminal and B terminal sides, respectively, and are provided for each line. Terminal A provided for each line
The side protection relay device 20 includes a current transformer 14 and a transformer 18.
From the power transmission system and the protection output of the protection relay device 21 arranged on the terminal B side. For example, when an accident occurs in the transmission line 13, the circuit breaker 16 is tripped (open circuit).
【００２２】図２は、本実施形態にかかる地絡および短
絡判定回路を示す図である。図において、２２は方向距
離リレーなどの短絡検出リレー、２３は方向地絡リレー
などの地絡検出リレー、２４は後述する地絡判定回路、
２５、２６はそれぞれ論理積回路、２７は短絡検出時に
回路遮断器を開路する短絡遮断装置、２８は地絡検出時
に回路遮断器を開路する地絡遮断装置、２９は遅延回路
であり、地絡検出リレー２３の過渡応答が減衰するに要
する遅延時間を与える。FIG. 2 is a diagram showing a ground fault and short circuit determination circuit according to this embodiment. In the figure, 22 is a short-circuit detection relay such as a directional distance relay, 23 is a ground fault detection relay such as a directional ground fault relay, 24 is a ground fault determination circuit described later,
25 and 26 are AND circuits, 27 is a short circuit breaker that opens a circuit breaker when a short circuit is detected, 28 is a ground fault breaker that opens a circuit breaker when a ground fault is detected, 29 is a delay circuit, A delay time required for the transient response of the detection relay 23 to attenuate is given.
【００２３】図に示すように短絡検出リレー２２の出力
および地絡判定回路２４の否定出力の論理積を論理積回
路２５でとると、地絡判定出力がないときのみ短絡検出
リレー２２の出力を論理積回路２５を介して短絡遮断装
置２７に供給することができる。As shown in the figure, when the logical product of the output of the short-circuit detecting relay 22 and the negative output of the ground fault determining circuit 24 is obtained by the logical product circuit 25, the output of the short-circuit detecting relay 22 is output only when there is no ground fault determining output. It can be supplied to the short circuit breaker 27 via the AND circuit 25.
【００２４】また、地絡検出リレー２３の出力および地
絡判定回路２４の出力の論理積を論理積回路２６でとる
と、地絡判定出力があるときのみ地絡検出リレー２３の
出力を遅延回路２９および論理積回路２６を介して地絡
遮断装置２８に供給することができる。When the logical product of the output of the ground fault detecting relay 23 and the output of the ground fault determining circuit 24 is calculated by an AND circuit 26, the output of the ground fault detecting relay 23 is output only when there is a ground fault determining output. The signal can be supplied to the ground fault cutoff device 28 via the AND circuit 26 and the AND circuit 26.
【００２５】図３はケーブルを含む系統における地絡事
故時のベクトル図および地絡判定回路を示す図であり、
（ａ）はａ相地絡事故時のベクトル図およびａ相地絡判
定回路を示す図 、（ ｂ）はｂ相地絡事故時のベクトル
図およびｂ相地絡判定回路を示す図、（ｃ）はｃ相地絡
事故時のベクトル図およびｃ相地絡判定回路を示す図で
ある。図において２４ａはａ相地絡判定回路、２４ｂは
ｂ相地絡判定回路、２４ｃはｃ相地絡判定回路である。FIG. 3 is a diagram showing a vector diagram and a ground fault determination circuit at the time of a ground fault in a system including a cable.
(A) is a diagram showing a vector diagram at the time of an a-phase ground fault and an a-phase ground fault determination circuit, (b) is a diagram showing a vector diagram at the time of a b-phase ground fault and a b-phase ground fault determination circuit, and (c). 3) is a vector diagram at the time of a c-phase ground fault and a diagram showing a c-phase ground fault determination circuit. In the figure, 24a is an a-phase ground fault determining circuit, 24b is a b-phase ground fault determining circuit, and 24c is a c-phase ground fault determining circuit.
【００２６】図（ａ）に示すようにａ相地絡事故時に
は、ａ相電圧は低下するが、ｂ相電圧Ｖbおよびｃ相電
圧Ｖcは正常時の相電圧６３．５Ｖよりも大きくなり、
ｂ相およびｃ相間の相間電圧Ｖbcは正常時の相間電圧１
１０Ｖよりも大きくなる。なお、この結果は実事故の解
析結果およびシュミレーション結果とよく一致してい
る。As shown in FIG. 3A, at the time of the a-phase ground fault, the a-phase voltage drops, but the b-phase voltage Vb and the c-phase voltage Vc become larger than the normal phase voltage of 63.5 V.
The inter-phase voltage Vbc between the b-phase and the c-phase is the normal inter-phase voltage 1
It becomes larger than 10V. These results are in good agreement with the analysis results and simulation results of the actual accident.
【００２７】したがって、Ｖbc＞１１０Ｖ、 Ｖb＞６
３．５Ｖ および Ｖc＞６３．５Ｖの３条件を満足す
るとき、発生している事故はａ相地絡事故であると判定
することができる。Therefore, Vbc> 110V, Vb> 6
When the three conditions of 3.5V and Vc> 63.5V are satisfied, it can be determined that the occurring accident is the a-phase ground fault.
【００２８】図において、Ｒ1はＶbc＞１１０Ｖの条件
を検出する電圧検出リレー、Ｒ2はＶb＞６３．５Ｖの条
件を検出する電圧検出リレー、Ｒ3はＶc＞６３．５Ｖの
条件を検出する電圧検出リレーであり、これらの電圧検
出リレーの論理積を論理積回路ＡＮＤで得ることにより
ａ相地絡事故を判定することができる。In the figure, R1 is a voltage detection relay for detecting a condition of Vbc> 110V, R2 is a voltage detection relay for detecting a condition of Vb> 63.5V, and R3 is a voltage detection relay for detecting a condition of Vc> 63.5V. The a-phase ground fault can be determined by obtaining the logical product of these voltage detection relays with a logical product circuit AND.
【００２９】なお、この判定法はケーブルを含む系統お
よび架空系統に関わらず適用することができる。また前
記３条件は短絡事故時に成立することはない。This determination method can be applied irrespective of the system including the cable and the overhead system. The above three conditions are not satisfied at the time of a short circuit accident.
【００３０】図（ｂ）に示すｂ相地絡事故時、および図
（ｃ）に示すｃ相地絡事故時のベクトル図および地絡事
故判定回路の構成および作用効果は、図（ａ）に示すａ
相地絡事故時のそれと同じであるから説明は省略する。The vector diagram and the configuration and operation and effect of the ground fault accident determination circuit at the time of the b-phase ground fault shown in FIG. 4B and at the time of the c-phase ground fault shown in FIG. 5C are shown in FIG. A
The description is omitted because it is the same as that at the time of the ground fault.
【００３１】図４は本実施形態にかかる地絡判定回路を
備えた保護リレー装置を示す図である。図において３０
は論理和回路であり、ａ相地絡判定回路２４ａ、ｂ相地
絡判定回路２４ｂ、およびｃ相地絡判定回路２４ｃの各
判定出力の論理和をとる。なお、図において図２ないし
図３に示される部分と同一部分については同一符号を付
してその説明を省略する。FIG. 4 is a diagram showing a protection relay device provided with a ground fault determining circuit according to the present embodiment. In the figure, 30
Is a logical sum circuit, which takes the logical sum of the respective determination outputs of the a-phase ground fault determining circuit 24a, the b-phase ground fault determining circuit 24b, and the c-phase ground fault determining circuit 24c. In the drawings, the same portions as those shown in FIGS. 2 and 3 are denoted by the same reference numerals, and description thereof will be omitted.
【００３２】図に示すように、ａ相の地絡事故を判定す
るａ相地絡判定回路２４ａ、ｂ相の地絡事故を判定する
ｂ相地絡判定回路２４ｂ、およびｃ相の地絡事故を判定
するｃ相地絡判定回路２４ｃの各判定出力の論理をとる
ことにより地絡事故を確実に検出することができる。す
なわち論理和回路３０の出力が「１」となるのは地絡事
故時のみであり、短絡事故時には「１」となることはあ
り得ない。したがって地絡事故および短絡事故を確実に
判別することができる。As shown in the figure, an a-phase ground fault determining circuit 24a for determining an a-phase ground fault, a b-phase ground fault determining circuit 24b for determining a b-phase ground fault, and a c-phase ground fault By taking the logic of each determination output of the c-phase ground fault determination circuit 24c for determining, the ground fault accident can be reliably detected. That is, the output of the OR circuit 30 becomes "1" only at the time of a ground fault, and cannot become "1" at the time of a short circuit. Therefore, a ground fault accident and a short circuit accident can be reliably determined.
【００３３】なお、以上は誘導成分および容量成分の大
きい系統としてケーブル系を例に説明したが、ケーブル
を一部に含む系統においても同様に適用できる。Although a cable system has been described above as an example of a system having a large inductive component and a large capacitive component, the present invention can be similarly applied to a system partially including a cable.
【００３４】[0034]
【発明の効果】以上説明したように、本発明によれば、
ケーブルを含む系統のように地絡事故発生時の過渡応答
により線間電圧が低下する系統においても、短絡事故と
地絡事故とを確実に判別できる。As described above, according to the present invention,
Even in a system in which the line voltage decreases due to a transient response at the time of occurrence of a ground fault, such as a system including a cable, a short circuit fault and a ground fault can be reliably determined.
【図１】本発明を適用することができるケーブル系統を
有する三相送電線の単線結線図である。FIG. 1 is a single-line diagram of a three-phase transmission line having a cable system to which the present invention can be applied.
【図２】本発明の実施形態にかかる地絡および短絡判定
回路を示す図である。FIG. 2 is a diagram showing a ground fault and short circuit determination circuit according to the embodiment of the present invention.
【図３】ケーブル系統を有する系統における地絡事故時
のベクトル図および地絡判定回路を示す図である。FIG. 3 is a diagram illustrating a vector diagram and a ground fault determination circuit at the time of a ground fault in a system having a cable system.
【図４】地絡判定回路を備えた保護リレー装置を示す図
である。FIG. 4 is a diagram illustrating a protection relay device including a ground fault determination circuit.
【図５】従来のケーブル系を有しない系統における従来
の地絡および短絡事故を検出する保護リレー装置を説明
する図である。FIG. 5 is a diagram illustrating a conventional protection relay device for detecting a ground fault and a short circuit accident in a system having no conventional cable system.
【図６】架空線系統およびケーブル系統における１線地
絡事故時のベクトル図を対比して示す図である。FIG. 6 is a diagram comparing a vector diagram at the time of a one-line ground fault in the overhead line system and the cable system.
１１，１２ 三相交流電源 １３ 送電線 １４，１５ 計器用変流器 １６，１７ 回路遮断器 １８，１９ 変成器（計器用変圧器） ２０，２１ 保護リレー ２２ 短絡検出リレー ２３ 地絡検出リレー ２４ 地絡判別回路 ２５，２６ 論理積回路 ２７ 短絡遮断回路 ２８ 地絡遮回路 ２９ 遅延回路 ３０ 論理和回路 11, 12 Three-phase AC power supply 13 Transmission line 14, 15 Current transformer for instrument 16, 17 Circuit breaker 18, 19 Transformer (transformer for instrument) 20, 21 Protection relay 22 Short-circuit detection relay 23 Ground fault detection relay 24 Ground fault determination circuit 25, 26 AND circuit 27 Short circuit cutoff circuit 28 Ground fault cutoff circuit 29 Delay circuit 30 OR circuit
Claims (4)
リレー装置において、 第１相および第２相間の相間電圧が第１の所定値以上で
あることを検出する第１の電圧検出リレーと、 前記第１相および第２相の相電圧がそれぞれ第２の所定
値以上であることを検出する第２および第３の電圧検出
リレーと、 前記第１，第２および第３の電圧検出リレーの検出出力
の論理積を得る論理回路からなり、該論理積回路出力に
基づき前記三相送電系統の地絡事故を検出することを特
徴とする保護リレー装置。1. A protection relay device for detecting a ground fault in a three-phase power transmission system, wherein a first voltage detection relay detects that an inter-phase voltage between a first phase and a second phase is equal to or more than a first predetermined value. And second and third voltage detection relays for detecting that the phase voltages of the first and second phases are respectively equal to or more than a second predetermined value; and the first, second and third voltage detections. A protection relay device comprising a logic circuit for obtaining a logical product of a detection output of a relay and detecting a ground fault in the three-phase power transmission system based on the logical product circuit output.
３の電圧検出リレーおよび第１，第２および第３の電圧
検出リレーの検出出力の論理積を得る論理積回路並びに
該論理積回路の出力の論理和を得る論理和回路を備え、
該論理和回路出力に基づき前記三相送電系統の地絡事故
を検出することを特徴とする保護リレー装置。2. The protection relay device according to claim 1, wherein the protection relay device detects the output of the first, second, and third voltage detection relays and the first, second, and third voltage detection relays for each phase. And a logical sum circuit for obtaining a logical sum of outputs of the logical product circuit,
A protection relay device for detecting a ground fault in the three-phase power transmission system based on the output of the OR circuit.
載において、 前記保護リレー装置はさらに地絡検出リレーを備え、該
地絡検出リレーの検出出力と、前記論理積回路出力の論
理積出力により地絡事故を検出することを特徴とする保
護リレー装置。3. The protection relay device according to claim 1, further comprising a ground fault detection relay, wherein a detection output of the ground fault detection relay and a logic of an output of the AND circuit are output. A protection relay device for detecting a ground fault by a product output.
て、 前記保護リレー装置はさらに短絡検出リレーを備え、該
短絡検出リレーの検出出力と、前記論理積回路出力の否
定出力との論理積出力により短絡事故を検出することを
特徴とする保護リレー装置。4. The protection relay device according to claim 1, further comprising a short-circuit detection relay, wherein a logical product output of a detection output of the short-circuit detection relay and a negative output of the logical product circuit output is provided. A protection relay device characterized by detecting a short-circuit accident by means of:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07834499A JP3824804B2 (en) | 1999-03-23 | 1999-03-23 | Protection relay device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07834499A JP3824804B2 (en) | 1999-03-23 | 1999-03-23 | Protection relay device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000278856A true JP2000278856A (en) | 2000-10-06 |
| JP3824804B2 JP3824804B2 (en) | 2006-09-20 |
Family
ID=13659382
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07834499A Expired - Fee Related JP3824804B2 (en) | 1999-03-23 | 1999-03-23 | Protection relay device |
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| Country | Link |
|---|---|
| JP (1) | JP3824804B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253309A (en) * | 2011-04-29 | 2011-11-23 | 上海磁浮交通发展有限公司 | Method for determining multipoint earth faults of long stator according to line voltage |
-
1999
- 1999-03-23 JP JP07834499A patent/JP3824804B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253309A (en) * | 2011-04-29 | 2011-11-23 | 上海磁浮交通发展有限公司 | Method for determining multipoint earth faults of long stator according to line voltage |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3824804B2 (en) | 2006-09-20 |
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