JPH0522839A - Ratio differential relay system - Google Patents
Ratio differential relay systemInfo
- Publication number
- JPH0522839A JPH0522839A JP3194832A JP19483291A JPH0522839A JP H0522839 A JPH0522839 A JP H0522839A JP 3194832 A JP3194832 A JP 3194832A JP 19483291 A JP19483291 A JP 19483291A JP H0522839 A JPH0522839 A JP H0522839A
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- Prior art keywords
- current
- output
- transformer
- relay device
- ratio
- 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
Description
【0001】[0001]
【産業上の利用分野】本発明は、電力系統における発電
機、変圧器、母線、送配電線の保護に用いられる比率差
動継電システムに関し、特に変流器が飽和した時の不要
動作防止対策に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ratio differential relay system used to protect generators, transformers, buses and distribution lines in a power system, and particularly to prevent unnecessary operation when a current transformer is saturated. Regarding measures.
【0002】[0002]
【従来の技術】従来、この種の装置として図5ないし図
7に示すものがある。図5は発電機保護継電装置GPの
外部継続図、図6は発電保護継電装置GPに使用される
比率差動手段87Gの内部ブロック図、図7は比率差動
手段87Gの比率差動特性図を示し、図5において、B
USは電力系統の母線、Gは被保護発電機、TRは被保
護発電機Gと同一の母線に接続された変圧器、Lは変圧
器TRの負荷、CB1、CB2、CB3は遮断器、CT
1、CT2は変流器、GPは発電機保護継電装置、IE
は変圧器TRを遮断器CB2により無負荷投入した時の
インラッシュ電流、I1 、I2 は変流器CT1、CT2
の2次側電流である。また、図6において、Id は差動
電流、C1、C2、C3は比率差動手段87Gの入力端
子、TRCは抑制電流(I1 +I2 )を導入する抑制入力
トランス、TOCは差動電流を導入する差動入力トラン
ス、CMは比率差動特性を得るための比較手段で、抑制
電流に対する差動電流の比率が一定値以上の時、すなわ
ち K=差動電流/抑制電流=Id /(I1 +I2 )=(I1 −I2 )/(I1 + I2 )>KS (例えばKS =0.1) で動作する。2. Description of the Related Art Conventionally, an apparatus of this type is shown in FIGS. 5 is an external continuation diagram of the generator protection relay device GP, FIG. 6 is an internal block diagram of the ratio differential means 87G used in the power generation protection relay device GP, and FIG. 7 is a ratio differential device of the ratio differential means 87G. A characteristic diagram is shown in FIG.
US is the bus of the power system, G is the protected generator, TR is the transformer connected to the same bus as the protected generator G, L is the load of the transformer TR, CB1, CB2 and CB3 are circuit breakers, CT
1, CT2 is a current transformer, GP is a generator protection relay device, IE
Is the inrush current when the transformer TR is turned on without load by the circuit breaker CB2, and I 1 and I 2 are the current transformers CT1 and CT2.
Is the secondary side current. In FIG. 6, I d is a differential current, C1, C2 and C3 are input terminals of the ratio differential means 87G, T RC is a suppression input transformer for introducing a suppression current (I 1 + I 2 ), and T OC is a difference. A differential input transformer for introducing a dynamic current, CM is a comparison means for obtaining a ratio differential characteristic, and when the ratio of the differential current to the suppression current is a certain value or more, that is, K = differential current / suppression current = I operating at d / (I 1 + I 2 ) = (I 1 -I 2) / (I 1 + I 2)> K S ( e.g. K S = 0.1).
【0003】このように構成された従来の発電機保護継
電装置GPの動作を説明する。 1)外部故障F2発生時(図7(a)、(b)参照) 変流器CT1、変流器CT2の2次側電流において、流
入電流I1F2 =流出電流I2F2 とすると、抑制トランス
TRCの出力である抑制電流=I1F2 +I2F2 と、差動ト
ランスTOCの出力である差動電流Id =I1F2 −I2F2
を比較手段CMで比較し、 K2F=差動電流/抑制電流=(I1F2 −I2F2 )/(I1F2 +I2F2 ) =0/I1F2 =0<KS =0.1 で、比率差動手段87Gは不動作となる。The operation of the conventional generator protection relay device GP thus configured will be described. 1) When an external failure F2 occurs (see FIGS. 7A and 7B) When the inflow current I 1F2 = outflow current I 2F2 in the secondary current of the current transformer CT1 and the current transformer CT2, the suppression transformer T and RC of which is the output suppressing current = I 1F2 + I 2F2, differential current I d = I 1F2 -I is the output of the differential transformer T OC 2F2
Are compared by the comparison means CM, and K 2F = differential current / suppression current = (I 1F2 −I 2F2 ) / (I 1F2 + I 2F2 ) = 0 / I 1F2 = 0 <K S = 0.1, and the ratio difference The moving means 87G becomes inoperative.
【0004】 2)内部故障F1発生時(図7(b)、(c)参照) 流入電流I1 =I1F1 、流出電流I2 =0とすると、抑
制電流=差動電流Id =I1F1 、 K1F=差動電流/抑制電流=(I1F1 −I2F1 )/(I1F1 +I2F1 ) =I1F1 /I1F1 =1>KS =0.1 で、比率差動手段87Gは動作する。2) When an internal failure F1 occurs (see FIGS. 7B and 7C) If inflow current I 1 = I 1F1 and outflow current I 2 = 0, suppression current = differential current I d = I 1F1 , K 1F = differential current / suppression current = (I 1F1 −I 2F1 ) / (I 1F1 + I 2F1 ) = I 1F1 / I 1F1 = 1> K S = 0.1, and the ratio differential means 87G operates. ..
【0005】[0005]
【発明が解決しようとする課題】上記の如く構成におい
ては、図5に示す変圧器TRを無負荷(遮断器CB3を
開放)でCB2で投入すると、図8に図示の様な直流分
IDCを含む大きなインラッシュ電流IE が変流器CT
1、CT2、を貫通して流れるが、このとき、本来は変
流器CT1、CT2の2次側電流I1 =I2 で差動電流
Id =0となるべきであるが、直流分による磁束が逐次
積分されて変流器CT1またはCT2の少なくとも一
方、例えばCT2が飽和して出力が低下し誤差電流が差
動電流Id として流れた場合、即ち、図7(C)に変流
器CT2飽和時のインラッシュとして図示の様な領域の
電流が入力されると、比率差動手段87Gが不要に動作
してCB1トリップ出力が出力されると言う重大な不具
合があった。In the configuration described above, when the transformer TR shown in FIG. 5 is turned on with no load (the circuit breaker CB3 is opened) at CB2, the DC component I DC as shown in FIG. 8 is obtained. A large inrush current I E including the current transformer CT
1 and CT2, but at this time, originally, the secondary current I 1 = I 2 of the current transformers CT1 and CT2 should be the differential current I d = 0, but it depends on the DC component. When the magnetic flux is sequentially integrated and at least one of the current transformers CT1 and CT2, for example, CT2 is saturated and the output decreases and an error current flows as a differential current I d , that is, the current transformer in FIG. 7C. When a current in the area shown in the figure is input as an inrush when CT2 is saturated, there is a serious problem that the ratio differential means 87G operates unnecessarily and the CB1 trip output is output.
【0006】この不具合を解決するためには、変流器を
大容量のものを使用することが望ましいが、大型化、高
コスト化で限界があり、現実的には直流分を含んだイン
ラッシュ電流の貫通時に完全に飽和しない充分な容量の
変流器を用意することは極めて困難である。In order to solve this inconvenience, it is desirable to use a current transformer having a large capacity, but there is a limit in increasing the size and cost, and in reality, the inrush including the DC component is limited. It is extremely difficult to prepare a current transformer with a sufficient capacity that does not completely saturate when a current passes through.
【0007】本発明は、上記のような不具合を解決する
ためになされたもので、直流分を含んだ変圧器のインラ
ッシュ電流が変流器CT1、CT2を貫通し少なくとも
一方の変流器が飽和する場合でも不要動作のない信頼度
の高い比率差動継電システムを提供することを目的とす
る。The present invention has been made to solve the above-mentioned problems, and the inrush current of the transformer containing the direct current component penetrates the current transformers CT1 and CT2 and at least one of the current transformers is It is an object of the present invention to provide a highly reliable ratio differential relay system that does not cause unnecessary operation even when saturated.
【0008】[0008]
【課題を解決するための手段】本発明に係る比率差動継
電システムは、発電機、母線、または送電線等の保護継
電装置と同一母線に接続された変圧器保護継電装置内
に、基本波に対する第2高調波の比率が一定値以上の時
出力を出すインラッシュ検出手段を備えると共に、各保
護継電装置内に、上記インラッシュ検出手段の出力がな
く比率差動手段の出力がある時トリップ出力を出すイン
ヒビット手段を備えたことを特徴とするものである。A ratio differential relay system according to the present invention is provided in a transformer protection relay device connected to the same bus as a protection relay device such as a generator, a bus bar, or a transmission line. , The inrush detection means for outputting an output when the ratio of the second harmonic to the fundamental wave is a certain value or more, and there is no output of the inrush detection means in each protective relay device, and the output of the ratio differential means It is characterized by comprising inhibit means for outputting a trip output at a certain time.
【0009】[0009]
【作用】上記の様に構成された比率差動継電システムに
おいては、変圧器が無負荷投入されインラッシュ電流が
発生すれば、変圧器保護継電装置内のインラッシュ検出
手段がインラッシュを検出し出力を各保護継電装置のイ
ンヒビット手段に転送する。各保護継電装置の比率差動
手段は変流器の飽和による誤差差動電流により不要動作
するが、比率差動検出手段の動作よりも早く転送された
インラッシュ検出信号がインヒビット信号として作用す
るので不要にトリップ出力を出すことはない。In the ratio differential relay system configured as described above, if no load is applied to the transformer and an inrush current is generated, the inrush detection means in the transformer protective relay will detect an inrush. The detected output is transferred to the inhibit means of each protective relay device. The ratio differential means of each protection relay device operates unnecessarily due to the error differential current due to the saturation of the current transformer, but the inrush detection signal transferred earlier than the operation of the ratio differential detection means acts as an inhibit signal. Therefore, trip output is not output unnecessarily.
【0010】[0010]
【実施例】実施例1.図1と図2は本発明の一実施例の
構成を示す。図5と同一部分は同一符号を付して示す図
1において、発電機Gを保護対象とする発電機保護継電
装置GP内には、比率差動手段87Gの他に、この比率
差動手段87Gの出力と後述する変圧器保護継電装置T
Pのインラッシュ検出手段F2Hからの信号を受信するた
めのインヒビット手段ING が備えられている。また、
変圧器TR側には変圧器保護継電装置TPが設けられ、
変圧器保護継電装置TPには、発電機保護継電装置GP
の比率差動手段87Gと同様な比率差動手段87Tと、
インラッシュ検出手段F2H及びインヒビット手段INT
が備えられている。なお、CT3、CT4は変流器を示
す。そして、上記インラッシュ検出手段F2Hは、図2に
示す様に、インラッシュ入力トランスTF2、基本波パス
フィルタF1P、第2高調波パスフィルタF2P、及び第2
高調波比率検出手段CMF2から構成されている。EXAMPLES Example 1. 1 and 2 show the configuration of an embodiment of the present invention. In FIG. 1 in which the same parts as those in FIG. 5 are denoted by the same reference numerals, in the generator protection relay device GP that protects the generator G, in addition to the ratio differential means 87G, this ratio differential means 87G output and transformer protection relay device T described later
Inhibit means IN G for receiving a signal from a P inrush detector F 2H is provided. Also,
A transformer protection relay device TP is provided on the transformer TR side,
The transformer protection relay device TP includes a generator protection relay device GP.
Ratio differential means 87T similar to the ratio differential means 87G,
Inrush detector F 2H and inhibit means IN T
Is provided. CT3 and CT4 are current transformers. The inrush detection means F 2H , as shown in FIG. 2, has an inrush input transformer T F2 , a fundamental wave pass filter F 1P , a second harmonic pass filter F 2P , and a second harmonic pass filter F 2P .
It is composed of the harmonic ratio detection means CM F2 .
【0011】上記の様に構成された保護継電装置TP及
びGPの動作を説明する。 1)直流分を含んだインラッシュが変流器CT1、CT
2を貫通する場合 図3の各部波形図により説明する。変圧器保護継電装置
TP内の比率差動手段87Tには変流器CT4の2次側
電流I4 のみしか流れないので差動電流=抑制電流とな
り、比率差動手段87Tは動作する。一方、インラッシ
ュ検出手段F2HにもCT4の2次側電流I4 が差動電流
として流れる。この電流はインラッシュ電流特有の第2
高調波分を多く含んでおり(一般に基本波成分に対する
第2の高調波成分の比率は12%以上)比率差動手段8
7Tの動作よりも早く、インラッシュ検出手段F2Hが動
作する。The operation of the protective relays TP and GP configured as above will be described. 1) The inrush including the DC component is the current transformer CT1, CT
Case of penetrating 2 will be described with reference to waveform charts of respective portions in FIG. Since only the secondary side current I 4 of the current transformer CT4 flows through the ratio differential means 87T in the transformer protection relay TP, the differential current = suppressing current, and the ratio differential means 87T operates. On the other hand, the secondary current I 4 of CT4 also flows as a differential current in the inrush detection means F 2H . This current is the second characteristic of inrush current.
It contains a large amount of harmonic components (generally, the ratio of the second harmonic component to the fundamental component is 12% or more). Ratio differential means 8
The inrush detection means F 2H operates earlier than the operation of 7T.
【0012】従って、比率差動手段87Tは出力を出す
が、インヒビット手段INT で阻止されるため、変圧器
保護継電装置TPとしてのトリップ出力でない。また同
時に、インラッシュ検出手段F2Hの出力が発電機保護継
電装置GPにインヒビット信号として比率差動手段87
Gが動作するよりも早く転送されており、発電機保護継
電装置GPの比率差動手段87Gの出力も確実に阻止さ
れ、発電機保護継電装置GPが不要に動作することはな
い。Accordingly, although the ratio differential means 87T issues an output, because it is blocked by the inhibit means IN T, non-trip output as transformer protective relay device TP. At the same time, the output of the inrush detection means F 2H is sent to the generator protection relay device GP as an inhibit signal and the ratio differential means 87.
Since it is transferred faster than G operates, the output of the ratio differential means 87G of the generator protection relay device GP is surely blocked, and the generator protection relay device GP does not operate unnecessarily.
【0013】2)外部故障F2発生時 図7(a)の従来の場合と同様に、差動電流が流れない
ので、比率差動手段87Gは不動作であり、従ってイン
ラッシュ検出手段F2Hの出力に拘わらず発電機保護継電
装置GPから従来と同様にトリップ出力は出ない。 3)内部故障F1発生時 図7(b)の従来の場合と同様で、流入電流=差動電流
で比率差動手段87Gが動作、このときインラッシュ検
出手段F2Hは出力しないので当該発電機保護継電装置G
Pの出力としては、従来と同様にトリップ出力が出力さ
れる。2) When an external failure F2 occurs As in the conventional case of FIG. 7 (a), since no differential current flows, the ratio differential means 87G is inoperative, and therefore the inrush detection means F 2H does not operate. The trip output is not output from the generator protection relay device GP regardless of the output as in the conventional case. 3) When an internal fault F1 occurs As in the conventional case of FIG. 7B, the ratio differential means 87G operates at the inflow current = differential current. At this time, the inrush detection means F 2H does not output, so the generator concerned Protection relay device G
As the output of P, a trip output is output as in the conventional case.
【0014】実施例2.以上の説明では、変圧器保護継
電装置TPでインラッシュ検出して出力を発電機保護継
電装置GPに転送する場合であったが、図4(a)のよ
うに、変圧器保護継電装置TPのインラッシュ検出手段
F2Hの出力を送電線保護継電装置LPに転送することに
より、直流分を含んだインラッシュ電流IE が変流器C
T5、CT6を貫通して送電線保護継電装置LPが不要
動作するのを阻止でき、実施例1と同様の効果が得られ
る。なお、BUS1、BUS2は母線、TLは被保護送
電線を示す。Example 2. In the above description, the transformer protection relay device TP detects inrush and transfers the output to the generator protection relay device GP. However, as shown in FIG. By transferring the output of the inrush detection means F 2H of the device TP to the transmission line protection relay device LP, the inrush current I E including the DC component is changed to the current transformer C.
Unnecessary operation of the power transmission line protection relay LP passing through T5 and CT6 can be prevented, and the same effect as that of the first embodiment can be obtained. In addition, BUS1 and BUS2 show a bus, and TL shows a protected transmission line.
【0015】実施例3.図4(b)において、BUSは
被保護母線、TR1、TR2変圧器、CT11、CT1
2、CT21、CT22、CT31、CT32、CT4
1、CT42は変流器、BPは母線保護比率差動保護継
電装置を示し、この実施例では、変圧器保護継電装置T
P1、TP2のインラッシュ検出手段F2H1 、F2H2 の
出力を母線保護継電装置BPに転送するようにしてい
る。この実施例は、複数のインラッシュ検出信号を一個
の母線保護継電装置に転送する方法であるが、この場合
も直流分を含んだインラッシュ電流IE が変流器CT1
1、CT12を貫通して母線保護継電装置BPが不要動
作するのを阻止して、上記各実施例と同様の効果が得ら
れる。Example 3. In FIG. 4B, BUS is a protected bus, TR1, TR2 transformer, CT11, CT1.
2, CT21, CT22, CT31, CT32, CT4
1, CT42 is a current transformer, BP is a busbar protection ratio differential protection relay device, and in this embodiment, a transformer protection relay device T.
The outputs of the inrush detection means F 2H1 and F 2H2 of P1 and TP2 are transferred to the busbar protection relay device BP. This embodiment is a method of transferring a plurality of inrush detection signals to one bus protection relay device. In this case as well, the inrush current I E including the DC component causes the current transformer CT1.
1, the busbar protection relay device BP is prevented from unnecessarily operating by penetrating the CT12, and the same effect as each of the above-described embodiments can be obtained.
【0016】[0016]
【発明の効果】以上の様に、本発明によれば、変圧器保
護継電装置に設置したインラッシュ検出手段の出力によ
って各保護継電装置の比率差動手段の出力をインヒビッ
トするようにしたので、非常に簡単な機能の追加により
変流器CT1、CT2を直流分を含んだインラッシュが
貫通し少なくとも一方のCTが飽和する場合でも不要動
作することのない信頼度の高い継電装置を得ることのが
できる。As described above, according to the present invention, the output of the ratio differential means of each protection relay device is inhibited by the output of the inrush detection means installed in the transformer protection relay device. Therefore, by adding a very simple function, a highly reliable relay device that does not operate unnecessarily even when at least one CT is saturated due to the inrush containing the DC component penetrating the current transformers CT1 and CT2. You can get it.
【図1】本発明の実施例1を示す発電機保護継電装置G
Pの構成図である。FIG. 1 is a generator protection relay device G showing a first embodiment of the present invention.
It is a block diagram of P.
【図2】本発明の実施例1のインラッシュ検出手段F2H
の構成図である。FIG. 2 is an inrush detection means F 2H according to the first embodiment of the present invention.
It is a block diagram of.
【図3】図1と図2の動作を説明する各部の波形図であ
る。FIG. 3 is a waveform diagram of each part for explaining the operation of FIGS. 1 and 2.
【図4】本発明の実施例2と3の送電線保護継電装置L
P、母線保護継電装置BPの構成図である。FIG. 4 is a transmission line protection relay device L according to the second and third embodiments of the present invention.
It is a block diagram of P and the busbar protection relay apparatus BP.
【図5】従来の発電機保護継電装置GPの構成図であ
る。FIG. 5 is a configuration diagram of a conventional generator protection relay device GP.
【図6】従来の発電機保護継電装置GPの比率差動手段
87Gの構成図である。FIG. 6 is a configuration diagram of a ratio differential means 87G of a conventional generator protection relay device GP.
【図7】従来の発電機保護継電装置GPの動作原理説明
図である。FIG. 7 is an explanatory diagram of an operation principle of a conventional generator protection relay device GP.
【図8】従来の発電機保護継電装置GPの動作を説明す
る各部の波形図である。FIG. 8 is a waveform diagram of each part for explaining the operation of the conventional generator protection relay device GP.
G 被保護発電機 TR 変圧器 BUS 母線 CT1、CT2、CT3、CT4 変流器 I1 、I2 変流器2次側電流 IE 変圧器のインラッシュ電流 TP 変圧器保護継電装置 GP 発電機保護継電装置 87G 発電機保護比率差動手段 87T 変圧器保護比率差動手段 F2H インラッシュ検出手段 TF2 インラッシュ入力トランス F1P 基本波パスフィルタ F2P 第2高調波パスフィルタ CMF2 第2高調波比率検出手段 ING 発電機保護インヒビット手段 INT 変圧器保護インヒビット手段G Protected generator TR Transformer BUS Bus bar CT1, CT2, CT3, CT4 Current transformer I 1 , I 2 Current transformer secondary side current IE Transformer inrush current TP Transformer protection relay device GP Generator protection Relay device 87G Generator protection ratio differential means 87T Transformer protection ratio differential means F 2H Inrush detection means T F2 Inrush input transformer F 1P fundamental wave pass filter F 2P 2nd harmonic pass filter CM F2 2nd harmonic wave ratio detector IN G generator protection inhibit means IN T transformer protection inhibit means
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成3年11月1日[Submission date] November 1, 1991
【手続補正1】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】0002[Name of item to be corrected] 0002
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【0002】[0002]
【従来の技術】従来、この種の装置として図5ないし図
7に示すものがある。図5は発電機保護継電装置GPの
外部接続図、図6は発電保護継電装置GPに使用される
比率差動手段87Gの内部ブロック図、図7は比率差動
手段87Gの比率差動特性図を示し、図5において、B
USは電力系統の母線、Gは被保護発電機、TRは被保
護発電機Gと同一の母線に接続された変圧器、Lは変圧
器TRの負荷、CB1、CB2、CB3は遮断器、CT
1、CT2は変流器、GPは発電機保護継電装置、IE
は変圧器TRを遮断器CB2により無負荷投入した時の
インラッシュ電流、I1 、I2 は変流器CT1、CT2
の2次側電流である。また、図6において、Id は差動
電流、C1、C2、C3は比率差動手段87Gの入力端
子、TRCは抑制電流(I1 +I2 )を導入する抑制入力
トランス、TOCは差動電流を導入する差動入力トラン
ス、CMは比率差動特性を得るための比較手段で、抑制
電流に対する差動電流の比率が一定値以上の時、すなわ
ち K=差動電流/抑制電流=Id /(I1 +I2 )=(I1 −I2 )/(I1 + I2 )>KS (例えばKS =0.1) で動作する。2. Description of the Related Art Conventionally, an apparatus of this type is shown in FIGS. Figure 5 is <br/> outer part connection diagram of the generator protective relay device GP, 6 internal block diagram of the ratio differential means 87G which is used for power generation protective relay device GP, 7 ratio differential means 87G shows a ratio differential characteristic diagram of 87G, and in FIG.
US is the bus of the power system, G is the protected generator, TR is the transformer connected to the same bus as the protected generator G, L is the load of the transformer TR, CB1, CB2 and CB3 are circuit breakers, CT
1, CT2 is a current transformer, GP is a generator protection relay device, IE
Is the inrush current when the transformer TR is turned on without load by the breaker CB2, and I 1 and I 2 are the current transformers CT1 and CT2.
Is the secondary side current. In FIG. 6, I d is a differential current, C1, C2 and C3 are input terminals of the ratio differential means 87G, T RC is a suppression input transformer for introducing a suppression current (I 1 + I 2 ), and T OC is a difference. A differential input transformer for introducing a dynamic current, CM is a comparison means for obtaining a ratio differential characteristic, and when the ratio of the differential current to the suppression current is a certain value or more, that is, K = differential current / suppression current = I operating at d / (I 1 + I 2 ) = (I 1 -I 2) / (I 1 + I 2)> K S ( e.g. K S = 0.1).
【手続補正2】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】0012[Correction target item name] 0012
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【0012】従って、比率差動手段87Tは出力を出す
が、インヒビット手段INT で阻止されるため、変圧器
保護継電装置TPとしてのトリップ出力は出ない。また
同時に、インラッシュ検出手段F2Hの出力が発電機保護
継電装置GPにインヒビット信号として比率差動手段8
7Gが動作するよりも早く転送されており、発電機保護
継電装置GPの比率差動手段87Gの出力も確実に阻止
され、発電機保護継電装置GPが不要に動作することは
ない。Accordingly, although the ratio differential means 87T issues an output, because it is blocked by the inhibit means IN T, have Na output is trip output as transformer protective relay device TP. At the same time, the output of the inrush detection means F 2H is sent to the generator protection relay device GP as an inhibit signal and the ratio differential means 8 is output.
Since the data is transferred earlier than the 7G operates, the output of the ratio differential means 87G of the generator protection relay GP is also reliably blocked, and the generator protection relay GP does not operate unnecessarily.
Claims (1)
は送電線等被保護対象の両端にそれぞれ少なくとも2個
の変流器を設置し、これら変流器による差動電流の抑制
電流に対する比率に基づきトリップ出力を送出する比率
差動手段を有する保護継電装置を被保護対象毎に備えた
比率差動継電システムにおいて、発電機、母線、または
送電線の保護継電装置と同一の母線に接続された変圧保
護継電装置内に、基本波に対する第2高調波成分の比率
が一定値以上の時出力を出すインラッシュ検出手段を設
けると共に、各保護継電装置に、上記変圧保護継電装置
内から転送されたインラッシュ検出手段の出力が無く、
当該保護継電装置内の比率差動手段の出力がある時トリ
ップ出力を出すインヒビット手段を備えたことを特徴と
する比率差動継電システム。Claims: 1. At least two current transformers are installed at both ends of a protected object such as a generator, a transformer, a bus bar, or a transmission line of a power system, and the difference caused by these current transformers is set. Protection of a generator, a bus bar, or a transmission line in a ratio differential relay system that includes a protection relay device having a ratio differential unit that outputs a trip output based on the ratio of the dynamic current to the suppression current In the transformer protection relay device connected to the same bus as the relay device, an inrush detection means for outputting an output when the ratio of the second harmonic component to the fundamental wave is equal to or more than a certain value is provided, and each protection relay device is provided. The device does not have the output of the inrush detection means transferred from within the transformer protection relay device,
A ratio differential relay system comprising inhibit means for outputting a trip output when an output of the ratio differential device in the protection relay device is present.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3194832A JP2675207B2 (en) | 1991-07-09 | 1991-07-09 | Ratio differential relay system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3194832A JP2675207B2 (en) | 1991-07-09 | 1991-07-09 | Ratio differential relay system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0522839A true JPH0522839A (en) | 1993-01-29 |
JP2675207B2 JP2675207B2 (en) | 1997-11-12 |
Family
ID=16331006
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3194832A Expired - Fee Related JP2675207B2 (en) | 1991-07-09 | 1991-07-09 | Ratio differential relay system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2675207B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20170204868A1 (en) * | 2014-07-14 | 2017-07-20 | Kabushiki Kaisha Toyota Jidoshokki | Electric supercharger |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5839221A (en) * | 1981-09-01 | 1983-03-07 | 株式会社東芝 | Protective relay unit |
JPS61173628A (en) * | 1985-01-28 | 1986-08-05 | 株式会社日立製作所 | Main circuit protector |
-
1991
- 1991-07-09 JP JP3194832A patent/JP2675207B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5839221A (en) * | 1981-09-01 | 1983-03-07 | 株式会社東芝 | Protective relay unit |
JPS61173628A (en) * | 1985-01-28 | 1986-08-05 | 株式会社日立製作所 | Main circuit protector |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20170204868A1 (en) * | 2014-07-14 | 2017-07-20 | Kabushiki Kaisha Toyota Jidoshokki | Electric supercharger |
Also Published As
Publication number | Publication date |
---|---|
JP2675207B2 (en) | 1997-11-12 |
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