JP2001016765A5

JP2001016765A5 -

Info

Publication number: JP2001016765A5
Application number: JP1999179492A
Authority: JP
Filing date: 1999-06-25
Publication date: 2006-08-03
Anticipated expiration: 2019-06-25

Description

【特許請求の範囲】
【請求項１】地絡検出信号を入力し、動作出力信号の動作設定時間Ｔ₁とＴ₂（但し、Ｔ₁＜Ｔ₂）に切り替えて動作出力信号を出力する出力信号切替手段と、前記地絡検出信号を入力し、この地絡検出信号を予め定めた優先順位に従って出力時間をｔ₁，ｔ₂…ｔ_nと順次遅らせて設定し、その一つを選択して出力するようにした優先順位設定手段と、前記地絡検出信号と優先順位設定手段の出力信号とのアンド条件が成立し、外部からのロック信号の無いことを条件にロック信号を出力するロック信号出力手段と、外部からのロック信号と優先順位設定手段の出力信号とのアンド条件が成立したとき、前記出力信号切替手段の動作設定時間をＴ₁からＴ₂に切り替えるとともに、ロック信号出力手段のロック信号の発生を抑える手段とを備えたことを特徴とするロック協調制御回路。
【請求項２】地絡検出信号を入力し、動作出力信号の動作設定時間Ｔ₁とＴ₂（但し、Ｔ₁＜Ｔ₂）に切り替えて動作出力信号を出力する出力信号切替手段と、前記地絡検出信号を入力し、この地絡検出信号を予め定めた優先順位に従って出力時間をｔ₁，ｔ₂…ｔ_nと順次遅らせて設定し、その一つを選択して出力するようにした優先順位設定手段と、前記地絡検出信号と優先順位設定手段の出力信号とのアンド条件が成立し、外部からのロック信号の無いことを条件にロック信号を出力するロック信号出力手段と、外部からのロック信号と優先順位設定手段の出力信号とのアンド条件が成立したとき、前記出力信号切替手段の動作設定時間をＴ₂に切り替えるとともに、ロック信号の発生を抑える手段と、前記出力信号切替手段の動作設定時間をＴ₁からＴ₂に切り替える時に、ロック信号出力手段にロック信号停止の指令信号を出力するロック協調制御回路を形成し、該ロック協調制御回路にバックアップ保護手段を付設するとともに、該バックアップ保護手段は、前記の地絡検出信号を入力して、この地絡検出信号を動作設定時間Ｔ₃（但し、Ｔ₃はＴ₁＜Ｔ₃＜Ｔ₂）に設定した遅延手段と、該遅延手段の出力信号を入力し、動作設定時間をＴ₂とＴ₄（但し、Ｔ₄はＴ₂＜Ｔ₄）に切り替えて動作出力信号を出力する出力信号切替手段と、前記遅延手段の出力信号を入力し、前記ロック協調制御回路の優先順位設定手段と連動して優先順位が設定される優先順位設定手段とを備え、該優先順位設定手段の優先順位２以下では、外部からのロック信号の有無を判断し、無いときに遅延手段の出力信号入力後、動作設定時間Ｔ₂に後に動作出力信号を出し、外部からのロック信号があるときはロック信号出力手段に、ロック信号停止の指令信号を出力するとともに、バックアップ保護手段の出力信号切替手段の動作設定時間をＴ₄に切り替えるように構成したことを特徴とするロック協調制御回路。
【請求項３】請求項１又は２記載のロック協調制御回路を備えた継電器を配電線に複数台直列的に設置し、各継電器のロック信号端子を共通の信号線で接続するとともに、各継電器は配電線の負荷側から電源側に優先順位を定め、各継電器は、定められた優先順位に従ってロック協調制御回路内の優先順位設定手段の順位を設定するようにしたことを特徴とする保護継電装置。
【請求項４】請求項３の継電器は、地絡方向継電器又は無方向性動作機能を備えた地絡方向継電器であることを特徴とする保護継電装置。 [Claims]
1. An output signal switching means for inputting a ground fault detection signal, switching the operation set time of the operation output signal to T ₁ and T ₂ (however, T ₁ <T ₂ ) and outputting the operation output signal, and the above. A ground fault detection signal is input, and the output time of this ground fault detection signal is _{set to be sequentially delayed to t 1} , t ₂ ... T _n according to a predetermined priority, and one of them is selected and output. An AND condition between the priority setting means, the ground fault detection signal and the output signal of the priority setting means is satisfied, and a lock signal output means that outputs a lock signal on the condition that there is no lock signal from the outside, and an external When the AND condition between the lock signal from and the output signal of the priority setting means is satisfied, the operation setting time of the output signal switching means is switched from T ₁ _{to T 2} , and the lock signal of the lock signal output means is generated. A lock coordinated control circuit characterized by being provided with a means for suppressing.
2. An output signal switching means for inputting a ground fault detection signal, switching the operation set time of the operation output signal to T ₁ and T ₂ (however, T ₁ <T ₂ ) and outputting the operation output signal, and the above. A ground fault detection signal is input, and the output time of this ground fault detection signal is _{set to be sequentially delayed to t 1} , t ₂ ... T _n according to a predetermined priority, and one of them is selected and output. An AND condition between the priority setting means, the ground fault detection signal and the output signal of the priority setting means is satisfied, and a lock signal output means that outputs a lock signal on the condition that there is no lock signal from the outside, and an external When the AND condition between the lock signal from and the output signal of the priority setting means is satisfied, the operation setting time of the output signal switching means _{is switched to T 2} , the means for suppressing the generation of the lock signal, and the output signal switching. When the operation setting time of the means _{is switched from T 1} to T ₂ , a lock cooperative control circuit for outputting a lock signal stop command signal is formed in the lock signal output means, and a backup protection means is attached to the lock cooperative control circuit. The backup protection means inputs the above-mentioned ground fault detection signal, and sets the ground fault detection signal as an operation set time T ₃ (where T ₃ is T ₁ <T ₃ <T ₂ ). , The output signal switching means that inputs the output signal of the delay means _{, switches the operation set time to T 2} and T ₄ (where T ₄ is T ₂ <T ₄ ) and outputs the operation output signal, and the delay means. The output signal of the above is input, and the priority setting means for which the priority is set in conjunction with the priority setting means of the lock coordination control circuit is provided. determining the presence or absence of the lock signal, after the output signal input of the delay means when no issues an operation output signal after the operation setting time T _2, the lock signal output means when there is a lock signal from the outside, the lock signal stop A lock coordination control circuit characterized in that the operation setting time of the output signal switching means of the backup protection means _{is switched to T 4 while outputting the command signal of.}
3. A plurality of relays provided with the lock coordination control circuit according to claim 1 or 2 are installed in series on a distribution line, and the lock signal terminals of each relay are connected by a common signal line, and each relay is connected. Priority is set from the load side of the distribution line to the power supply side, and each relay sets the order of the priority setting means in the lock cooperative control circuit according to the set priority. Electrical equipment.
4. The protective relay according to claim 3, wherein the relay is a ground fault direction relay or a ground fault direction relay having a non-directional operation function.

しかし、この地絡方向継電器（装置）は、零相電圧信号のパルス間にロック信号を発生させるようにしているので、本願の出願人が先に提案した特開平５−１０３４１７号のように、零相電圧の発生がしにくい配電系統（一線完全接地時の地絡電流が大きい配電系統）の地絡検出に適した地絡方向継電器にあっては、零相電圧が設定レベルに達しない場合でも、零相電流が設定レベルに達したとき動作する無方向性動作機能を備え、この無方向性動作機能は、零相電圧信号の検出が無い場合でも動作するので、前述のロック協調がとれない、という新な課題が発生した。 However, since this ground fault direction relay (device) generates a lock signal between the pulses of the zero-phase voltage signal, as in Japanese Patent Application Laid-Open No. 5-103417 previously proposed by the applicant of the present application, If the zero-phase voltage does not reach the set level for a ground fault direction relay suitable for ground fault detection in a distribution system that is unlikely to generate zero-phase voltage (a distribution system with a large ground fault current when the line is completely grounded) However, it has a non-directional operation function that operates when the zero-phase current reaches the set level, and this non-directional operation function operates even when the zero-phase voltage signal is not detected, so the above-mentioned lock coordination can be obtained. A new issue has arisen that there is no such thing.

この配電線に設置する継電器は、地絡方向継電器、無方向性動作機能を備えた地絡方向継電器のいずれでもよい。 The relay installed on this distribution line may be either a ground fault direction relay or a ground fault direction relay having a non-directional operation function.

５２は優先順位設定手段で、配電線に設置される継電器の台数を予定し（本例では４台）予定した台数の数の遅延回路ｔ₁，ｔ₂，ｔ₃，ｔ₄を切替可能に設け、この遅延時間を負荷側から電源側に優先順位をＰ₁，Ｐ₂，Ｐ₃，Ｐ₄と定めて、順次時間を長くする。図２の例では、遅延回路ｔ₁からｔ₄側に優先順位を下げ、夫々の遅延時間を２０ｍｓｅｃ，４０ｍｓｅｃ，６０ｍｓｅｃ，８０ｍｓｅｃとした場合である。これを可動接触子５２ａにより、配電線に設置されたとき、定められた優先順位Ｐ₁〜Ｐ₄に従って設定する。例えば、図５の場合の例では、負荷側の地絡方向継電器ＤＧＲ４が最も優先順位が高くＰ₁となり、ＤＧＲ３〜ＤＧＲ１は、Ｐ₂〜Ｐ₄と順に順位が下がる。従ってＤＧＲ４は図２のように遅延回路ｔ₁（２０ｍｓｅｃ）に設定されることになる。 52 is a priority setting means, and the number of relays installed on the distribution line is planned (4 in this example), and the planned number of delay circuits t ₁ , t ₂ , t ₃ , and t ₄ can be switched. This delay time is set from the load side to the power supply side in order of priority as P ₁ , P ₂ , P ₃ , and P _4, and the time is sequentially lengthened. In the example of FIG. 2 _{, the priority is lowered from the delay circuit t 1} to the t ₄ side, and the delay times are set to 20 msec, 40 msec, 60 msec, and 80 msec, respectively. The movable contact 52a of this, when installed in the distribution line, set according to the priority P ₁ to P ₄ defined. For example, in the case of FIG. 5, the ground fault direction relay DGR4 on the load side has the highest priority and _{becomes P 1} , and DGR 3 to DGR 1 decrease in order from _{P 2 to} P _4. Therefore, the DGR 4 is set in the delay circuit t ₁ (20 msec) as shown in FIG.

継電器ＤＧＲ２およびＤＧＲ１も同様に、出力信号切替手段５１の動作設定時間の切り替えを、夫々６０ｍｓｅｃおよび８０ｍｓｅｃ後にＴ ₂に切り替える。 Similarly, the relays DGR2 and DGR1 also switch the operation setting time of the output signal switching means 51 to T ₂ after 60 msec and 80 msec, respectively.

共通の信号線は、図５のように、零相電圧信号線がある場合は、これを利用してもよいが、図１のように継電器内に零相電圧要素を有する場合は、共通の信号線を設ければよい。 As the common signal line, if there is a zero-phase voltage signal line as shown in FIG. 5, this may be used, but if the relay has a zero-phase voltage element as shown in FIG. 1 , it is common. A signal line may be provided.

【００４８】
【発明の効果】
以上のように本発明は、従来のように零相電圧信号を用いることなく、地絡検出信号を用いるとともに、この地絡検出信号を基準にロック信号の有無を、各継電器は、優先順位に従って時間をづらして判断するようにし、動作設定時間Ｔ₁で動作させるか、又はＴ₂に遅延させるかを判断して協調をもたせるようにしたので、地絡方向継電器や無方向性機能を備えた方向継電器に適用でき、しかもバックアップ保護機能も備えることができる等、極めて優れた効果を奏するものである。 0048
【Effect of the invention】
As described above, the present invention uses a ground fault detection signal instead of using a zero-phase voltage signal as in the conventional case, and each relay determines the presence or absence of a lock signal based on this ground fault detection signal according to the priority order. It is equipped with a ground fault directional relay and a non-directional function because it is made to judge by shifting the time, and it is decided whether to operate at the operation set time T ₁ or _{to delay it to T 2} so that it can cooperate. It can be applied to a directional relay and can also have a backup protection function, which is an extremely excellent effect.