JPH0833192A - Relay control device - Google Patents
Relay control deviceInfo
- Publication number
- JPH0833192A JPH0833192A JP16912494A JP16912494A JPH0833192A JP H0833192 A JPH0833192 A JP H0833192A JP 16912494 A JP16912494 A JP 16912494A JP 16912494 A JP16912494 A JP 16912494A JP H0833192 A JPH0833192 A JP H0833192A
- Authority
- JP
- Japan
- Prior art keywords
- current
- output
- detection means
- current detection
- relay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
(57)【要約】
【目的】 負荷側変流器に残留する励磁突入電流の直流
成分で偏磁および飽和状態となった負荷変流器による比
率差動継電器の不要動作を防止する。
【構成】 保護対象の両端に設けられた電流検出手段
３，４と、電流検出手段より保護対象に流入する電流と
流出する電流との差を検出する差電流検出手段６と、保
護対象の両端に設けられた電流検出手段のうち負荷側に
設けられた電流検出手段４によって検出される電流の基
本波電流に対する第２高調波電流の含有率が所定値以上
であるかを判定する励磁電流判定手段８と、保護対象へ
の給電を制御し保護する継電手段15と、保護対象の負荷
側に多相をまとめて貫通する零相電流検出手段13と、差
電流検出手段の出力と励磁電流判定手段の出力と負荷側
に設けられた電流検出手段の出力と零相電流検出手段の
出力とを基に継電手段を制御する制御手段11とを有す
る。
(57) [Abstract] [Purpose] To prevent unnecessary operation of the ratio differential relay by the load current transformer that is biased and saturated due to the DC component of the excitation inrush current remaining in the load current transformer. Configurations: current detection means 3 and 4 provided at both ends of a protection target; difference current detection means 6 for detecting a difference between a current flowing into the protection target and a current flowing out from the current detection means; and both ends of the protection target. Exciting current determination for determining whether the content ratio of the second harmonic current to the fundamental current of the current detected by the current detecting means 4 provided on the load side of the current detecting means provided in Means 8, relay means 15 for controlling and protecting the power supply to the protection target, zero-phase current detection means 13 penetrating through the multiple phases on the load side of the protection target, output of the differential current detection means and exciting current The control means 11 controls the relay means based on the output of the determination means, the output of the current detection means provided on the load side, and the output of the zero-phase current detection means.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電力変圧器の保護に用
いられ、特に変流器が飽和した時の不要動作を防止する
継電制御装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a relay control device used for protecting a power transformer, and particularly for preventing unnecessary operation when a current transformer is saturated.
【０００２】[0002]
【従来の技術】差動継電器は保護設備に短絡または接地
事故が発生した場合や系統に悪影響を与えるような異常
運転が行なわれた場合には保護設備の入力側の電流と出
力側の電流とに差が生じることを利用して保護設備を保
護するものである。2. Description of the Related Art A differential relay is designed so that the current on the input side and the current on the output side of the protective equipment are the same when a short-circuit or grounding accident occurs in the protective equipment or when abnormal operation that adversely affects the system is performed. It is intended to protect the protective equipment by utilizing the difference between the two.
【０００３】図３は継電制御装置の概略図である。但
し、簡略化のため１相分のみを示している。継電制御器
１は変圧器２の電源側に設けられた変流器３の電源側変
流器２次電流Ｉ1 と変圧器２の負荷側に設けられた変流
器４の負荷側変流器２次電流Ｉ2 とを基に変圧器２の保
護を行なっている。FIG. 3 is a schematic diagram of a relay control device. However, for simplification, only one phase is shown. The relay controller 1 includes a power source side current transformer secondary current I 1 of the current transformer 3 provided on the power source side of the transformer 2 and a load side transformer of a current transformer 4 provided on the load side of the transformer 2. The transformer 2 is protected based on the secondary current I 2 of the transformer.
【０００４】図４に継電制御装置の保護動作ブロック図
を示す。電源側変流器２次電流Ｉ1と負荷側変流器２次
電流Ｉ2 とは差電流検出回路６によってその電流の差で
ある差電流が求められる。差電流は、前記変圧器２の内
部故障を判定するＤＩＦ要素７に入力される。ＤＩＦ要
素７では保護設備内に故障がなければその保護設備の入
力電流と出力電流との差が零であるという電流のキルヒ
ホッフの第１法則を応用して、前記変圧器２が正常運転
時または外部故障時に適正な変流比整合が行なわれてい
れば、電源側変流器２次電流Ｉ1 と負荷側変流器２次電
流Ｉ2 とに差電流は生じないことと、前記変圧器２の内
部に故障が発生すると電流の平衡がくずれ、電源側変流
器２次電流Ｉ1 と負荷側変流器２次電流Ｉ2 とに差電流
が生じることとを利用して、差電流が生じた場合に
“１”を出力する。FIG. 4 shows a protection operation block diagram of the relay control device. A difference current, which is the difference between the secondary current I 1 of the power source side current transformer and the secondary current I 2 of the load side current transformer, is obtained by the difference current detection circuit 6. The difference current is input to the DIF element 7 which determines an internal failure of the transformer 2. In the DIF element 7, if the difference between the input current and the output current of the protective equipment is zero if there is no failure in the protective equipment, the first Kirchhoff's law of current is applied to the transformer 2 during normal operation or If proper current ratio matching is performed at the time of external failure, no difference current will occur between the power source side current transformer secondary current I 1 and the load side current transformer secondary current I 2, and the transformer When a failure occurs inside 2, the current balance is lost and a difference current is generated between the power source side current transformer secondary current I 1 and the load side current transformer secondary current I 2. If "1" occurs, "1" is output.
【０００５】２Ｆ−ＬＯＣＫ要素８では変圧器の励磁突
入電流による誤動作防止のため、励磁突入電流の高調波
含有率が高いこと、特に第２高調波が多く含有すること
を利用して、電源側変流器２次電流Ｉ1 と負荷側変流器
２次電流Ｉ2 との差電流の基本波電流Ｉ1fと第２高調波
電流Ｉ2fとを検出して、基本波電流Ｉ1fに対する第２高
調波電流の含有率を求め、この含有率が所定の値以上に
なると“１”を出力する。２Ｆ−ＬＯＣＫ要素８の出力
は否定回路９に入力される。In the 2F-LOCK element 8, in order to prevent malfunction due to the exciting inrush current of the transformer, the fact that the harmonic content rate of the exciting inrush current is high, in particular, the fact that a large amount of the second harmonic is contained, is utilized to the power supply side. The fundamental current I 1f and the second harmonic current I 2f, which are the difference between the current transformer secondary current I 1 and the load-side current transformer secondary current I 2 , are detected, and the first harmonic current I 1f relative to the fundamental current I 1f is detected. The content rate of the second harmonic current is obtained, and when the content rate is equal to or higher than a predetermined value, "1" is output. The output of the 2F-LOCK element 8 is input to the NOT circuit 9.
【０００６】ＤＩＦ要素７の出力と否定回路９の出力と
は論理積回路１０に入力され、論理積が成立すると保護
回路５が動作する。これにより差電流が生じてもそれが
励磁突入電流によるものの場合には保護回路５は動作し
ない。The output of the DIF element 7 and the output of the NOT circuit 9 are input to the logical product circuit 10, and when the logical product is established, the protection circuit 5 operates. As a result, even if a difference current is generated, if it is due to the magnetizing inrush current, the protection circuit 5 does not operate.
【０００７】[0007]
【発明が解決しようとする課題】従来の継電制御装置で
は前記変圧器２の負荷側にある変圧器の度重なる投入時
に発生する励磁突入電流に含有する直流成分が負荷側に
ある変圧器の度重なる投入時に除去されず前記変圧器２
の電源側および負荷側の変流器に直流成分が残留するた
め、前記変圧器２のいづれかの変流器において変流器が
偏磁あるいは飽和状態になり変流器２次回路内で不平衡
が生じ、前記変圧器が内部故障を起こしていないにもか
かわらず継電制御装置内部で差電流が発生し保護回路５
が不要動作する。従って、本発明では励磁突入電流に含
有する直流成分が変流器に残留することによる不要動作
を防止する継電制御装置を提供することを目的とする。In the conventional relay control device, the DC component contained in the exciting inrush current generated at the time of repeated closing of the transformer on the load side of the transformer 2 is on the load side. The transformer 2 is not removed by repeated loading.
Since the DC component remains in the current transformers on the power source side and the load side of the current transformer, the current transformers in any one of the transformers 2 become demagnetized or saturated and become unbalanced in the current transformer secondary circuit. Occurs, a differential current is generated inside the relay control device even though the transformer has no internal failure, and the protection circuit 5
There is no unnecessary operation. Therefore, it is an object of the present invention to provide a relay control device that prevents an unnecessary operation due to a DC component contained in an exciting inrush current remaining in a current transformer.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するた
め、本発明は、保護対象の両端に設けられた電流検出手
段と、上記電流検出手段より保護対象に流入する電流と
流出する電流との差を検出する差電流検出手段と、上記
保護対象の両端に設けられた電流検出手段のうち負荷側
に設けられた電流検出手段によって検出される電流の基
本波電流に対する第２高調波電流の含有率が所定値以上
であるかを判定する励磁電流判定手段と、上記保護対象
への給電を制御し保護する継電手段と、上記継電手段を
制御する制御手段とを有する継電制御装置において、上
記保護対象の負荷側に多相をまとめて貫通する零相電流
検出手段と、上記差電流検出手段の出力と上記励磁電流
判定手段の出力と上記負荷側に設けられた電流検出手段
の出力と上記零相電流検出手段の出力とを基に上記継電
手段を制御する制御手段とを有したことを特徴とする。In order to achieve the above object, the present invention comprises a current detection means provided at both ends of a protection target, and a current flowing into the protection target and a current flowing out from the current detection means. Inclusion of the second harmonic current with respect to the fundamental wave current of the current detected by the difference current detection means for detecting the difference and the current detection means provided on the load side among the current detection means provided at both ends of the protection target. In a relay control device having an exciting current determination means for determining whether the rate is a predetermined value or more, a relay means for controlling and protecting power supply to the protection target, and a control means for controlling the relay means. , Zero-phase current detection means for penetrating multiple phases collectively on the load side to be protected, output of the difference current detection means, output of the excitation current determination means, and output of current detection means provided on the load side And the above zero-phase electric Characterized in that based on the output of the detection means has a control means for controlling the relay means.
【０００９】[0009]
【作用】励磁突入電流の直流成分によって起こる変流器
の偏磁および飽和状態で生じる継電制御装置の不要動作
を防止するために、負荷側の電流検出回路と零相電流検
出回路との出力を基にして、励磁突入電流に含有する直
流成分による偏磁あるいは飽和状態の場合には負荷側の
電流検出回路では見かけ上電流が流れる。しかし、この
ときに電力系統故障検出用の零相電流検出回路には系統
内で地絡故障が発生しているわけではないので零相電流
は流れないことを用い、負荷側の電流検出回路の出力と
零相電流検出回路の出力とがこの関係にあるときには保
護回路が動作することのないように制御する。[Function] In order to prevent unnecessary operation of the relay control device caused by the biased magnetism and saturation of the current transformer caused by the DC component of the excitation inrush current, the output of the load side current detection circuit and the zero-phase current detection circuit On the basis of the above, in the case of the demagnetization or the saturation state due to the DC component contained in the exciting inrush current, an apparent current flows in the load side current detection circuit. However, at this time, the zero-phase current detection circuit for power system failure detection does not have a ground fault in the system, so the zero-phase current does not flow. When the output and the output of the zero-phase current detection circuit have this relationship, the protection circuit is controlled so as not to operate.
【００１０】[0010]
【実施例】以下に本発明の実施例を図面を参照して説明
する。図１は本発明の継電制御装置の一実施例を示す概
略図である。本発明の継電制御装置は継電制御器11と、
変圧器２と、変圧器２の電源側に設けられた変流器３
と、変圧器２の負荷側に設けられた変流器４と、変流器
４に接続されている地絡過電流継電器12と、零相変流器
13と、零相変流器13に接続されている地絡過電流継電器
14と、保護回路15とで構成されている。変圧器２の負荷
側には遮断機16と変圧器17が接続されている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view showing an embodiment of the relay control device of the present invention. The relay control device of the present invention is a relay controller 11,
Transformer 2 and current transformer 3 provided on the power source side of the transformer 2.
, A current transformer 4 provided on the load side of the transformer 2, a ground fault overcurrent relay 12 connected to the current transformer 4, and a zero-phase current transformer
13 and a ground fault overcurrent relay connected to the zero-phase current transformer 13.
14 and a protection circuit 15. A circuit breaker 16 and a transformer 17 are connected to the load side of the transformer 2.
【００１１】遮断器の投入を度重ねると、変圧器に励磁
突入電流が発生し、励磁突入電流に含有する直流成分が
前記変圧器２の負荷側に接続されている変流器４の一部
に残留し、変流器４を偏磁あるいは飽和状態にさせる。
偏磁あるいは飽和状態でない場合は負荷側に接続されて
いる負荷側変流器４の中性点では零であるが、直流成分
による偏磁あるいは飽和状態の場合は負荷側に接続され
ている変流器４の中性点では零にならない。よって見掛
け上の零相電流が流れ、地絡過電流継電器12が動作する
のに対し、電力系統故障検出用の零相変流器13には系統
内で地絡故障が発生しているのではないため零相電流は
流れず、地絡過電流継電器14は不動作となる。前記地絡
過電流継電器12が動作し、前記地絡過電流継電器14が不
動作のときは、変流器４が直流成分により偏磁あるいは
飽和状態になったため、前記継電制御器内部に差電流が
発生する。この場合は、変圧器２の内部故障が原因では
なく継電制御器11に差電流が発生しているのでこの様な
ときには保護回路15が動作しないように制御する必要が
ある。When the circuit breaker is repeatedly turned on, an exciting inrush current is generated in the transformer, and a direct current component contained in the exciting inrush current is part of the current transformer 4 connected to the load side of the transformer 2. Remains, and causes the current transformer 4 to be demagnetized or saturated.
When the magnetic field is not biased or saturated, it is zero at the neutral point of the load side current transformer 4 connected to the load side, but when it is biased or saturated due to the DC component, it is connected to the load side. It does not become zero at the neutral point of the flow vessel 4. Therefore, the apparent zero-phase current flows and the ground fault overcurrent relay 12 operates, whereas the zero-phase current transformer 13 for detecting the power system fault does not indicate that a ground fault has occurred in the system. Therefore, the zero-phase current does not flow, and the ground fault overcurrent relay 14 does not operate. When the ground fault overcurrent relay 12 operates and the ground fault overcurrent relay 14 does not operate, since the current transformer 4 is biased or saturated due to the DC component, a differential current is generated inside the relay controller. appear. In this case, the internal failure of the transformer 2 is not the cause and the differential current is generated in the relay controller 11. Therefore, it is necessary to control so that the protection circuit 15 does not operate in such a case.
【００１２】そのための継電制御装置の保護ブロック図
を図２に示す。動作すると“１”を出力する地絡過電流
継電器12の出力と、動作すると“１”を出力する地絡過
電流継電器14の出力を否定回路21に入力し否定をとった
出力とを論理積回路22に入力し論理積をとる。A protection block diagram of a relay control device for that purpose is shown in FIG. The AND circuit 22 outputs the output of the ground fault overcurrent relay 12 that outputs “1” when it operates and the output of the ground fault overcurrent relay 14 that outputs “1” when it operates and inputs a negative signal to the NOT circuit 21. Input to and take the logical product.
【００１３】変流器３の出力と、変流器４の出力とは差
電流検出回路６に入力し、その電流の差である差電流を
求める。差電流は、差電流の基本波電流に対する第２高
調波電流の含有率が所定の値以上になると“１”を出力
する２Ｆ−ＬＯＣＫ要素８に入力される。また差電流は
前記変圧器の内部故障を差電流のレベルで判定し内部故
障と判定すると“１”を出力するＤＩＦ要素７に入力さ
れる。The output of the current transformer 3 and the output of the current transformer 4 are input to a difference current detection circuit 6 to obtain a difference current which is the difference between the currents. The difference current is input to the 2F-LOCK element 8 that outputs "1" when the content rate of the second harmonic current with respect to the fundamental wave current of the difference current becomes a predetermined value or more. Further, the differential current is input to the DIF element 7 which outputs "1" when the internal failure of the transformer is determined by the level of the differential current and the internal failure is determined.
【００１４】更に前記論理積22の出力と、前記２Ｆ−Ｌ
ＯＣＫ要素８の出力とは否定論理和回路23に入力され、
否定論理和がとられる。前記否定論理和回路23の出力
と、前記ＤＩＦ要素７の出力とは論理積回路24に入力さ
れ論理積がとられ、この論理積回路24の論理積が成立す
ると継電制御器11が動作する。Further, the output of the logical product 22 and the 2F-L
The output of the OCK element 8 is input to the NOR circuit 23,
NOR is taken. The output of the NOR circuit 23 and the output of the DIF element 7 are input to a logical product circuit 24 to take a logical product. When the logical product of the logical product circuit 24 is established, the relay controller 11 operates. .
【００１５】図２に示した保護ブロック図で遮断器16の
開閉を度重ね変圧器17に励磁突入電流が発生して、その
励磁突入電流に含有する直流成分が変流器４の一部に残
留し変流器４を偏磁あるいは飽和状態にさせた場合の動
作を説明する。In the protection block diagram shown in FIG. 2, the circuit breaker 16 is repeatedly opened and closed to generate an exciting inrush current in the transformer 17, and a DC component contained in the exciting inrush current is partially transferred to the current transformer 4. The operation when the remaining current transformer 4 is demagnetized or saturated will be described.
【００１６】この場合には、地絡過電流継電器12は動作
し、地絡過電流継電器14は動作しない。よって論理和回
路22には地絡過電流継電器12からは動作を示す“１”が
入力され、他方の入力には地絡過電流継電器14からの不
動作を示す“０”を否定回路21によって反転させた
“１”が入力され、出力としてそれらの論理積をとった
“１”が出力される。この論理和回路22の出力“１”
と、前記２Ｆ−ＬＯＣＫ要素８の出力とを否定論理和回
路23に入力し否定論理和をとると、前記２Ｆ−ＬＯＣＫ
要素８の出力に関係なく出力は“０”となる。よって、
この否定論理和回路２３の出力“０”と、前記ＤＩＦ要
素７の出力との論理積をとっても“０”となるので継電
制御器１１を不動作にすることができ、保護回路15を動
作させない。In this case, the ground fault overcurrent relay 12 operates and the ground fault overcurrent relay 14 does not operate. Therefore, “1” indicating the operation is input from the ground fault overcurrent relay 12 to the logical sum circuit 22, and “0” indicating the non-operation from the ground fault overcurrent relay 14 is inverted to the other input by the negation circuit 21. "1" is input, and "1" which is the logical product of them is output as the output. Output "1" of this OR circuit 22
And the output of the 2F-LOCK element 8 are input to the NOR circuit 23 and the NOR is taken, the 2F-LOCK
The output is “0” regardless of the output of the element 8. Therefore,
The logical product of the output "0" of the NOR circuit 23 and the output of the DIF element 7 is "0", so that the relay controller 11 can be made inoperative and the protection circuit 15 can be operated. Do not let
【００１７】次に変圧器２の内部故障の場合について説
明する。この場合には地絡過電流継電器12も地絡過電流
継電器14も動作する。よって論理積回路22には、地絡過
電流継電器12からは動作を示す“１”が入力され、他方
の入力には地絡過電流継電器14からの動作を示す“１”
を否定回路21によって反転させた“０”が入力され、出
力としてそれらの論理積をとった“０”が出力される。
この論理積回路22の出力“０”と、前記２Ｆ−ＬＯＣＫ
要素８の出力“０”とを否定論理和回路23に入力し、否
定論理和をとると“１”が出力される。よって、この否
定論理和回路23の出力“１”と、前記ＤＩＦ要素７の出
力“１”とを論理積回路24に入力し、論理積をとると
“１”となり、継電制御器11を動作させることができ、
保護回路15を動作させる。Next, the case of an internal failure of the transformer 2 will be described. In this case, both the ground fault overcurrent relay 12 and the ground fault overcurrent relay 14 operate. Therefore, to the AND circuit 22, "1" indicating the operation is input from the ground fault overcurrent relay 12, and "1" indicating the operation from the ground fault overcurrent relay 14 is input to the other input.
"0" which is inverted by the NOT circuit 21 is input, and "0" which is the logical product of them is output as the output.
The output "0" of the AND circuit 22 and the 2F-LOCK
The output "0" of the element 8 is input to the NOR circuit 23, and when the NOR is obtained, "1" is output. Therefore, the output "1" of the NOR circuit 23 and the output "1" of the DIF element 7 are input to the logical product circuit 24, and the logical product is "1", and the relay controller 11 is turned on. Can be operated,
The protection circuit 15 is operated.
【００１８】本実施例では、励磁突入電流による誤動作
防止のための基本波電流に対する第２高調波電流の含有
率を差電流によってもとめているが変圧器の負荷側変流
器の２次電流によってもとめても良い。In the present embodiment, the content ratio of the second harmonic current to the fundamental current for preventing malfunction due to the inrush current of excitation is determined by the difference current, but by the secondary current of the load side current transformer of the transformer. You can ask for it.
【００１９】よって、本実施例によると保護される負荷
側の変流器で起きる直流成分による負荷側の変流器の偏
磁および飽和状態による継電制御装置の不要動作を防ぐ
ことができる。Therefore, according to the present embodiment, it is possible to prevent unnecessary operation of the relay control device due to the demagnetization and saturation of the load side current transformer due to the DC component generated in the load side current transformer to be protected.
【００２０】[0020]
【発明の効果】以上説明したように、本発明では保護さ
れる設備の負荷側の変流器に残留する直流成分による負
荷側の変流器の偏磁および飽和状態による継電制御装置
の不要動作を防ぐことができる。As described above, according to the present invention, there is no need for a relay control device due to the demagnetization and saturation of the load side current transformer due to the DC component remaining in the load side current transformer of the equipment to be protected. The operation can be prevented.
【図１】本発明の一実施例を示す概略図FIG. 1 is a schematic view showing an embodiment of the present invention.
【図２】図１に示す実施例の保護ブロック図FIG. 2 is a protection block diagram of the embodiment shown in FIG.
【図３】従来の継電制御装置の概略図FIG. 3 is a schematic diagram of a conventional relay control device.
【図４】図３に示す継電制御装置の保護ブロック図FIG. 4 is a protection block diagram of the relay control device shown in FIG.
１，11…継電制御装置 ２…変圧器 ３，４…変流器 ６…差電流検出回路 ７…ＤＩＦ要素 ８…２Ｆ−ＬＯＣＫ要素 ９，21…否定回路 10，22，24…論理積回路 12，14…地絡過電流継電器 13…零相変流器 15…保護回路 23…否定論理和回路 1, 11 ... Relay control device 2 ... Transformer 3, 4 ... Current transformer 6 ... Differential current detection circuit 7 ... DIF element 8 ... 2F-LOCK element 9, 21 ... Negation circuit 10, 22, 24 ... AND circuit 12, 14 ... Ground fault overcurrent relay 13 ... Zero-phase current transformer 15 ... Protection circuit 23 ... NOR circuit
Claims (3)
段と、前記電流検出手段より保護対象に流入する電流と
流出する電流との差を検出する差電流検出手段と、前記
保護対象の両端に設けられた電流検出手段のうち負荷側
に設けられた電流検出手段によって検出される電流の基
本波電流に対する第２高調波電流の含有率が所定値以上
であるかを判定する励磁電流判定手段と、前記保護対象
への給電を制御し保護する継電手段と、前記継電手段を
制御する制御手段とを有する継電制御装置において、前
記保護対象の負荷側に多相をまとめて貫通する零相電流
検出手段と、前記差電流検出手段の出力と前記励磁電流
判定手段の出力と前記負荷側に設けられた電流検出手段
の出力と前記零相電流検出手段の出力とを基に前記継電
手段を制御する制御手段とを具備したことを特徴とする
継電制御装置。1. A current detection means provided at both ends of a protection target, a difference current detection means for detecting a difference between a current flowing into the protection target and a current flowing out from the current detection means, and both ends of the protection target. Exciting current determination means for determining whether the content ratio of the second harmonic current to the fundamental current of the current detected by the current detection means provided on the load side of the current detection means provided in In a relay control device having a relay unit that controls and protects power supply to the protection target and a control unit that controls the relay unit, multiple phases are collectively penetrated to the load side of the protection target. Zero-phase current detection means, the output of the differential current detection means, the output of the excitation current determination means, the output of the current detection means provided on the load side, and the output of the zero-phase current detection means based on the output Control to control electric means A relay control device comprising:
出力の否定演算をする否定回路と、この否定回路の出力
と前記負荷側に設けられた電流検出手段の出力との論理
積をとる第１の論理積回路と、この第１の論理積回路の
出力と前記励磁電流判定手段の出力との否定論理和をと
る否定論理和回路と、この否定論理和回路の出力と前記
差電流検出手段の出力との論理積をとる第２の論理積回
路とを有することを特徴とする請求項１記載の継電制御
装置。2. The control means obtains a logical product of a negative circuit for performing a negative operation on the output of the zero-phase current detecting means and the output of the negative circuit and the output of the current detecting means provided on the load side. A first logical product circuit, a negative logical sum circuit which performs a negative logical sum of the output of the first logical product circuit and the output of the exciting current judging means, the output of the negative logical sum circuit and the difference current detection. 2. A relay control device according to claim 1, further comprising a second AND circuit that obtains a logical product with the output of the means.
は、変流器と地絡過電流継電器とからなり、前記零相電
流検出手段は、零相変流器と地絡過電流継電器とからな
ることを特徴とする請求項１または請求項２記載の継電
制御装置。3. The current detecting means provided on the load side comprises a current transformer and a ground fault overcurrent relay, and the zero-phase current detecting means comprises a zero-phase current transformer and a ground fault overcurrent relay. The relay control device according to claim 1 or 2, characterized in that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16912494A JPH0833192A (en) | 1994-07-21 | 1994-07-21 | Relay control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16912494A JPH0833192A (en) | 1994-07-21 | 1994-07-21 | Relay control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0833192A true JPH0833192A (en) | 1996-02-02 |
Family
ID=15880734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16912494A Pending JPH0833192A (en) | 1994-07-21 | 1994-07-21 | Relay control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0833192A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006058475A1 (en) * | 2004-12-02 | 2006-06-08 | Zhejiang University | Transformer longitudinal difference protection method with zero-sequence ratio braking |
| CN100367598C (en) * | 2004-02-13 | 2008-02-06 | 浙江大学 | Positive Sequence Synthetic Braking Device to Prevent Misoperation of Multi-Branch Transformer Differential Protection |
| CN100367601C (en) * | 2004-12-02 | 2008-02-06 | 浙江大学 | Phase-separated zero-sequence braking method to prevent transformer protection malfunction |
| CN100367597C (en) * | 2004-02-13 | 2008-02-06 | 浙江大学 | Maximum differential current braking device to prevent misoperation of multi-branch transformer differential protection |
| CN100367596C (en) * | 2004-02-13 | 2008-02-06 | 浙江大学 | Phase Split Braking Device to Prevent Misoperation of Transformer Differential Protection |
| CN100367599C (en) * | 2004-02-13 | 2008-02-06 | 浙江大学 | Positive-sequence differential current comprehensive braking device to prevent misoperation of multi-branch transformer differential protection |
| CN100409525C (en) * | 2004-02-13 | 2008-08-06 | 浙江大学 | Fault component three-phase composite zero-sequence braking device to prevent transformer protection maloperation |
| CN100409522C (en) * | 2004-02-13 | 2008-08-06 | 浙江大学 | Three-phase Braking Device Using Fault Components to Prevent Misoperation of Transformer Differential Protection |
| CN100409527C (en) * | 2004-02-13 | 2008-08-06 | 浙江大学 | Synthetic Method of Phase Sequence Synthesis to Prevent Misoperation of Multi-Branch Transformer Differential Protection |
| JP2019504602A (en) * | 2015-10-12 | 2019-02-14 | ゼネラル エレクトリック テクノロジー ゲゼルシャフト ミット ベシュレンクテル ハフツングＧｅｎｅｒａｌ Ｅｌｅｃｔｒｉｃ Ｔｅｃｈｎｏｌｏｇｙ ＧｍｂＨ | Improved or related protection for power transformers |
-
1994
- 1994-07-21 JP JP16912494A patent/JPH0833192A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100367598C (en) * | 2004-02-13 | 2008-02-06 | 浙江大学 | Positive Sequence Synthetic Braking Device to Prevent Misoperation of Multi-Branch Transformer Differential Protection |
| CN100367597C (en) * | 2004-02-13 | 2008-02-06 | 浙江大学 | Maximum differential current braking device to prevent misoperation of multi-branch transformer differential protection |
| CN100367596C (en) * | 2004-02-13 | 2008-02-06 | 浙江大学 | Phase Split Braking Device to Prevent Misoperation of Transformer Differential Protection |
| CN100367599C (en) * | 2004-02-13 | 2008-02-06 | 浙江大学 | Positive-sequence differential current comprehensive braking device to prevent misoperation of multi-branch transformer differential protection |
| CN100409525C (en) * | 2004-02-13 | 2008-08-06 | 浙江大学 | Fault component three-phase composite zero-sequence braking device to prevent transformer protection maloperation |
| CN100409522C (en) * | 2004-02-13 | 2008-08-06 | 浙江大学 | Three-phase Braking Device Using Fault Components to Prevent Misoperation of Transformer Differential Protection |
| CN100409527C (en) * | 2004-02-13 | 2008-08-06 | 浙江大学 | Synthetic Method of Phase Sequence Synthesis to Prevent Misoperation of Multi-Branch Transformer Differential Protection |
| WO2006058475A1 (en) * | 2004-12-02 | 2006-06-08 | Zhejiang University | Transformer longitudinal difference protection method with zero-sequence ratio braking |
| CN100367601C (en) * | 2004-12-02 | 2008-02-06 | 浙江大学 | Phase-separated zero-sequence braking method to prevent transformer protection malfunction |
| JP2019504602A (en) * | 2015-10-12 | 2019-02-14 | ゼネラル エレクトリック テクノロジー ゲゼルシャフト ミット ベシュレンクテル ハフツングＧｅｎｅｒａｌ Ｅｌｅｃｔｒｉｃ Ｔｅｃｈｎｏｌｏｇｙ ＧｍｂＨ | Improved or related protection for power transformers |
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