JPS5952617B2 - Phase comparison relay device - Google Patents
Phase comparison relay deviceInfo
- Publication number
- JPS5952617B2 JPS5952617B2 JP55-44925A JP4492580A JPS5952617B2 JP S5952617 B2 JPS5952617 B2 JP S5952617B2 JP 4492580 A JP4492580 A JP 4492580A JP S5952617 B2 JPS5952617 B2 JP S5952617B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- output
- generates
- terminal
- 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.)
- Expired
Links
Description
【発明の詳細な説明】 この発明は位相比較継電装置に関するものである。[Detailed description of the invention] The present invention relates to a phase comparison relay device.
位相比較継電方式は保護する送電線の両端の電流位相を
比較して内部事故の有無を検出するものであるが、内部
事故時、両端から電流が流入するときは上記原理に基い
て容易に内部事故を検出し得るが、内部事故時一端から
のみ電流が流入し、他端子は無電流となるような片端電
源系統の保護には何等かの対策が必要である。The phase comparison relay method detects the presence or absence of an internal fault by comparing the current phases at both ends of the power transmission line to be protected.Based on the above principle, it is easy to detect the presence or absence of an internal fault when current flows from both ends in the event of an internal fault. Although an internal fault can be detected, some kind of measure is required to protect a single-end power supply system in which current flows only from one terminal and no current flows to the other terminals in the event of an internal fault.
通常の片端電源系統は電源端が固定されているので、比
較的対策が施しやすく、各種考案がなされ、実用化され
ている。Since the power supply end of a normal single-end power supply system is fixed, it is relatively easy to take countermeasures, and various ideas have been devised and put into practical use.
その一例として特願昭44−37996号がある。An example of this is Japanese Patent Application No. 1973-37996.
これは一端が電源端に固定され、他端が可変電源端(場
合によって電源端となったり非電源端となったりする端
子)に固定された送電線に適用されるものであり、可変
電源端では(引外し許容信号1)を、電源端では(引外
し許容信号2)を導出するもので゛ある。This applies to power transmission lines where one end is fixed to the power source end and the other end is fixed to the variable power source end (terminal that can be the power source end or non-power end depending on the case). In this case, (trip permission signal 1) is derived, and (trip permission signal 2) is derived at the power supply end.
ここで(引外し許容信号1)および(引外し許容信号2
)とは、次のものである。Here, (trip permission signal 1) and (trip permission signal 2)
) is the following.
(引外し許容信号1)電流の方向に関係なく、電流レベ
ルがある所定レベル以下であること。(Tripping permission signal 1) The current level is below a certain predetermined level, regardless of the direction of the current.
(引外し許容信号2)電流レベルが一定レベル以上であ
ること。(Tripping permission signal 2) The current level is above a certain level.
このようにして、内部事故時に一方の端子が無電流とな
る場合でも一応は保護できるようになった。In this way, even if one terminal becomes non-current in the event of an internal accident, it is now possible to provide some protection.
しかし、500KV系統等に見られるような長距離送電
線では内部事故の故障点の位置によって、両端の故障電
流が大きく変化し、いずれが一方の端子が無電流端とな
るような両端可変電源扱いの必要が生じてきた。However, in long-distance transmission lines such as those found in 500KV systems, the fault current at both ends changes greatly depending on the location of the fault point due to an internal fault, and the terminals are treated as variable power supplies with one terminal being a no-current terminal. The need has arisen.
両端可変電源端扱いをするためには、それぞれの端子で
(引外し許容信号1)および(引外し許容信号2)を導
出する必要があるが、特願昭44−37996号(特公
昭5l−28814)では一端において1種類の情報し
か導出していないので、両端可変電源扱いとすることは
できなかった。In order to treat both ends as variable power supply terminals, it is necessary to derive (trip permission signal 1) and (trip permission signal 2) from each terminal. 28814), only one type of information is derived at one end, so it could not be treated as a variable power source at both ends.
この発明は、両端可変電源扱いできることを目的とする
もので、内部事故時、いずれかの端子から電流が流入す
れば、他端が無電流でも必ず故障を検出できる位相比較
継電装置を提供するものである。The purpose of this invention is to provide a phase comparison relay device that can be used as a variable power source at both ends, and can detect a failure even if there is no current at the other end if current flows from either terminal in the event of an internal fault. It is something.
以下この発明の一実施例を図について説明する。An embodiment of the present invention will be described below with reference to the drawings.
第1図はこの発明の構成を示すブロック図で、1は送電
線、2はしゃ断器、3は端子電流に所定の関係で対応す
る電気量に変換する電流変換回路、4は電気量の瞬時値
が正の予定値より正側にあるとき1、負にあるとき0
(引外し許容信号1)の矩形波v4を導出する矩形波変
換回路、5は電気量の瞬時値が負の予定値より正側にあ
るとき1、負側にあるとき0 (引外し許容信号2)の
矩形波■5を導出する矩形波変換回路、6,7は矩形波
■4を相手端子へ伝送する信号伝送装置の送・受信部を
示し、例えば、マイクロ回線で信号伝送するときは、矩
形波の1のときfHHz、0のときf LHzの周波数
に変調して伝送するFS方式が通常使用される。FIG. 1 is a block diagram showing the configuration of the present invention, in which 1 is a power transmission line, 2 is a circuit breaker, 3 is a current conversion circuit that converts terminal current into an amount of electricity corresponding to a predetermined relationship, and 4 is an instantaneous amount of electricity. 1 when the value is on the positive side of the positive expected value, 0 when it is negative
A rectangular wave conversion circuit 5 derives a rectangular wave v4 of (trip permission signal 1), 5 is 1 when the instantaneous value of the electric quantity is on the positive side of the negative scheduled value, and 0 when it is on the negative side (trip permission signal 2) A rectangular wave conversion circuit that derives the rectangular wave ■5, and 6 and 7 indicate the transmitting/receiving section of a signal transmission device that transmits the rectangular wave ■4 to the other terminal.For example, when transmitting a signal via a micro line, , an FS method is usually used in which a rectangular wave is modulated to a frequency of fHz when it is 1 and fLHz when it is 0 and then transmitted.
受信部7の出力には、対応した相手端子の送信部6の入
力矩形波v′4が復調されて導出される。The input rectangular wave v'4 of the transmitting section 6 of the corresponding partner terminal is demodulated and derived as the output of the receiving section 7.
8は信号伝送路6がら7までの信号伝送遅延時間を補償
するための矩形波遅延回路である。8 is a rectangular wave delay circuit for compensating the signal transmission delay time from the signal transmission lines 6 to 7.
9は2個の矩形波入力がともに1であるとき1を発生す
るAND回路、10は2個の矩形波入力がともに0のと
き1を発生するNOR回路、11は入力が1である期間
が所定時間以上のとき、出力v1、を発生する判定回路
、12はV1□が発生したとき、しゃ断器2をしゃ断制
御するしゃ断制御回路である。9 is an AND circuit that generates 1 when two rectangular wave inputs are both 1, 10 is a NOR circuit that generates 1 when both rectangular wave inputs are 0, and 11 is a period when the input is 1. A determination circuit 12 generates an output v1 when a predetermined time is exceeded, and a cutoff control circuit 12 controls the cutoff of the breaker 2 when V1□ occurs.
両端の判定回路11は自端信号v5と相手端信号v4を
比較判定するように構成しである。The determination circuits 11 at both ends are configured to compare and determine the own end signal v5 and the opposite end signal v4.
第2図乃至第6図は第1図の構成ブロック図の各種系統
故障に対する動作を説明するための波形図で、第2図は
貫通外部事故時、第3図は無電流外部事故時で、これら
はA端・B端でもVllは発生しないで、確実に不動作
となる。Figures 2 to 6 are waveform diagrams for explaining the operation of the configuration block diagram in Figure 1 in response to various system failures; Figure 2 is for a through-through external fault, Figure 3 is for a no-current external fault; These do not generate Vll even at the A terminal and the B terminal, and are definitely inoperable.
第4図は両端流入内部事故時で、A端・B端ともV工、
が斜線で示すように1サイクルに1回発生して動作する
。Figure 4 shows an internal accident with inflow at both ends.
occurs and operates once per cycle as shown by diagonal lines.
第5図および第6図はこの発明の目的性能を示すもので
、第5図はA端流入、B端無電流、第6図はB端流入、
A端無電流の内部事故等で、いずれも流入端はv1□が
1サイクルに1回発生して動作する。Figures 5 and 6 show the objective performance of this invention. Figure 5 shows A-terminal inflow, B-terminal no current, Figure 6 shows B-terminal inflow,
Due to an internal fault with no current at the A end, etc., the inflow end operates with v1□ occurring once per cycle.
この動作信号を無電流端へ転送すれば無電流端をトリッ
プできる。By transferring this operating signal to the no-current end, the no-current end can be tripped.
要するに、この発明の位相比較継電装置は内部事故時、
両端流入はもちろん、いずれの端子が無電流となっても
、確実に故障を検出し、いかなる外部事故であっても誤
動作しない性能を持たせることができる。In short, the phase comparison relay device of the present invention, in the event of an internal accident,
It is possible to reliably detect a failure not only when current flows in both ends, but also when any terminal has no current, and has the ability to prevent malfunctions even in the event of any external accident.
各端子の予定値の絶対値の関係は、自端子信号v5を導
出する予定値を他端子信号V4′を導出する予定値に比
し等しいかまたは大きくしておくことが望ましい。Regarding the relationship between the absolute values of the scheduled values of each terminal, it is desirable that the scheduled value from which the own terminal signal v5 is derived is equal to or larger than the scheduled value from which the other terminal signal V4' is derived.
以上のようにこの発明は、自端電流の瞬時値が予定の極
性で且つその絶対値が負の予定値より正側にあるときを
1、負側にあるときを0とする矩形波信号V5と、他端
子電流の瞬時値が正の予定値より正側にあるときを1、
負側にあるときを0とする矩形波信号V4′とを用いて
位相比較を行なう装置を保護区間の各端子に設けるよう
にしたので、各端が可変電源端扱いとされる送電線に内
部事故が生じたとき、いずれかの端子から電流が流入す
れば、他端が無電流でも必ず故障を検出し保護すること
ができる。As described above, the present invention provides a rectangular wave signal V5 which takes a value of 1 when the instantaneous value of the self-end current has a predetermined polarity and whose absolute value is on the positive side of the negative predetermined value, and takes a value of 0 when it is on the negative side. and 1 when the instantaneous value of the other terminal current is on the positive side of the positive expected value.
Since each terminal of the protection zone is equipped with a device that performs phase comparison using the square wave signal V4', which takes zero when it is on the negative side, each terminal is treated as a variable power supply terminal. When an accident occurs, if current flows from either terminal, the failure can always be detected and protected even if there is no current at the other terminal.
第1図はこの発明の構成を示すブロック図、第2図乃至
第6図は第1図の動作を説明するための波形図である。
なお図中、同一記号は、同一または相当部分を示す。FIG. 1 is a block diagram showing the configuration of the present invention, and FIGS. 2 to 6 are waveform diagrams for explaining the operation of FIG. 1. Note that in the figures, the same symbols indicate the same or equivalent parts.
Claims (1)
対応した電気量を導出する導出回路、上記各導出回路の
出力側にそれぞれ対応して設けられ、自端側の上記導出
回路からの電気量を第1の極性の所定値と比較して正側
にあるときを1、負側にあるときを0とする第1の矩形
波信号を発生する第1の信号発生回路、上記各導出回路
の出力側にそれぞれ対応して設けられ、目端側の上記導
出回路からの電気量を上記第1の極性とは異なる第2の
極性の所定値とを比較して正側にあるときを1、負側に
あるときを0とする第2の矩形波信号を発生する第2の
信号発生回路、上記各第1の信号発生回路の出力側にそ
れぞれ対応して設けられ自端側の上記第1の信号発生回
路からの第1の信号に基いて送信信号を相手側に送信す
る送信回路、 上記送信回路にそれぞれ対応して設けられ相手端側の上
記送信回路からの送信信号を受信し出力信号を送出する
受信回路、 両端側にそれぞれ設けられ、自端側の上記第2の信号発
生回路からの第2の信号と自端側の上記受信回路からの
出力信号との0信号の重なり期間を予め設定された設定
期間と比較し、その比較結果に応じた判定出力を発生す
る判定回路、各判定回路の出力側にそれぞれ対応して設
けられ自端側の上記判定回路からの判定出力に基いて、
上記被保護区間に設けられた回路しゃ断器にしゃ断制御
信号を送出するしゃ断制御回路を備えた位相比較継電装
置。[Scope of Claims] 1 Derivation circuits provided at both ends of the protected section and deriving the amount of electricity corresponding to the grid current; A first signal generation circuit that generates a first rectangular wave signal that compares the amount of electricity from the derivation circuit with a predetermined value of a first polarity and sets the value to 1 when it is on the positive side and 0 when it is on the negative side. , is provided corresponding to the output side of each of the deriving circuits, and compares the amount of electricity from the deriving circuit on the end of the eye with a predetermined value of a second polarity different from the first polarity to determine the positive side. a second signal generation circuit that generates a second rectangular wave signal that is 1 when the signal is on the negative side and 0 when the signal is on the negative side; a transmitting circuit that transmits a transmission signal to the other end based on a first signal from the first signal generating circuit on the end side; A receiving circuit that receives a signal and sends out an output signal, which is provided on each end side and generates a second signal from the second signal generating circuit on the own end side and an output signal from the above receiving circuit on the own end side. A determination circuit that compares the overlapping period of the 0 signal with a preset setting period and generates a determination output according to the comparison result, and the above-mentioned determination circuit on the own end side provided corresponding to the output side of each determination circuit. Based on the judgment output from
A phase comparison relay device comprising a cutoff control circuit that sends a cutoff control signal to a circuit breaker provided in the protected section.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55-44925A JPS5952617B2 (en) | 1980-04-04 | Phase comparison relay device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55-44925A JPS5952617B2 (en) | 1980-04-04 | Phase comparison relay device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5952617B2 true JPS5952617B2 (en) | 1984-12-20 |
JPS5952617B1 JPS5952617B1 (en) | 1984-12-20 |
Family
ID=
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