JP2000228821A - Optical pcm current differential relay system - Google Patents
Optical pcm current differential relay systemInfo
- Publication number
- JP2000228821A JP2000228821A JP2949099A JP2949099A JP2000228821A JP 2000228821 A JP2000228821 A JP 2000228821A JP 2949099 A JP2949099 A JP 2949099A JP 2949099 A JP2949099 A JP 2949099A JP 2000228821 A JP2000228821 A JP 2000228821A
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- Prior art keywords
- station
- current
- transmission
- protection relay
- zero
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、異地点間で、サ
ンプリング同期を取る必要があるディジタルＰＣＭ電流
差動形保護継電装置において、そのサンプリング同期シ
ステムにＧＰＳ（Gloval Posisioning System）を利用
したサンプリング同期回路技術を併用し、光ＰＣＭ電流
差動保護継電システムの伝送システムの障害などによる
主保護ロックとなる状態をできる限り最小にする光ＰＣ
Ｍ電流差動リレー方式に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital PCM current differential protection relay which needs to synchronize sampling between different points, and uses a GPS (Global Posisioning System) as its sampling synchronization system. An optical PC that uses synchronous circuit technology and minimizes the main protection lock state due to a failure in the transmission system of the optical PCM current differential protection relay system, etc.
The present invention relates to an M-current differential relay system.
【０００２】[0002]
【従来の技術】従来、異なる地点間の同期の取り方は、
ＰＣＭ電流差動リレー等のディジタル保護継電装置で
は、光ファイバー伝送路で情報を交換し、同期を取る技
術が確立している。2. Description of the Related Art Conventionally, how to synchronize between different points is as follows.
In a digital protection relay device such as a PCM current differential relay, a technology for exchanging information and synchronizing information through an optical fiber transmission line has been established.
【０００３】例えば、図８に示すように、構成された保
護継電装置の親局Ａ，中間局Ｂ，Ｃ，Ｄ及び折り返し局
Ｅがループ型光ファイバー伝送路で接続されている場
合、ＡからＢ→Ｃ→Ｄ→Ｅ→Ｄ→Ｃ→Ｂ→Ａのように同
期信号とサンプリングデータを流す。For example, as shown in FIG. 8, when a master station A, intermediate stations B, C, D and a return station E of a protection relay device are connected by a loop-type optical fiber transmission line, A The synchronization signal and the sampling data flow in the order of B → C → D → E → D → C → B → A.
【０００４】そして、図９に示すように、同期信号の送
受信に対し、各局は伝送路での伝送遅れ時間の存在か
ら、送信タイミングと受信タイミングの中間時刻をサン
プリング同期点とすることで、各局のデータサンプリン
グタイミングを一致させている。[0006] As shown in FIG. 9, when transmitting and receiving a synchronization signal, each station sets an intermediate time between the transmission timing and the reception timing as a sampling synchronization point due to the existence of a transmission delay time on a transmission line. Are matched with each other.
【０００５】中間局は、下りルートで以下の項目のいず
れかが検出（瞬時）されたことで伝送エラーとする マルチフレーム同期異常 フレーム同期異常 固定ビット異常 ＣＲＣ異常 受信断 また、中間局は、検出したエラーを修復し、マルチフレ
ームの電流データを零にする。またフレーム内のレディ
フラグを零（アンレディ）にする。そして中間局は、前
方保護時間待ち、この間に復旧すれば正常とする。復帰
しなければ、フレーム内の上り，下りルート両方にエラ
ー情報をセットし、他の局に伝送路不良発生を伝える。[0005] The intermediate station sets a transmission error when any of the following items is detected (instantaneously) in the downstream route. Multi-frame synchronization error Frame synchronization error Fixed bit error CRC error Reception interruption The error that has occurred is corrected, and the current data of the multiframe is set to zero. The ready flag in the frame is set to zero (unready). Then, the intermediate station waits for the forward protection time, and if it recovers during this time, it is determined to be normal. If it does not return, error information is set in both the upstream and downstream routes in the frame, and the other stations are notified of the occurrence of the transmission path failure.
【０００６】図１０（ａ）について、親局と中間局の間
で光ファイバー伝送路が断線した場合、断線時親局から
送信されるマルチフレームＦ１は中間局に届かない。そ
こで中間局では親局１のフレームＦ１を電流データ零、
レディビット零としたマルチフレームを再構築する。中
間局では自局のデータをフレームＦ２に多重しない（レ
ディビットをセットしない）。ただし、この場合下りル
ート異常のため、フレームＦ２の下りルート異常のフラ
グ“１”を立てる。再構築されたマルチフレームを受信
した中間局以降の装置は、アンレディをみて、自局のデ
ータをフラグＦ３に多重しない。Referring to FIG. 10A, when the optical fiber transmission line is disconnected between the master station and the intermediate station, the multiframe F1 transmitted from the master station does not reach the intermediate station at the time of the disconnection. Therefore, the intermediate station sets the frame F1 of the master station 1 to zero current data,
Reconstruct a multi-frame with ready bit zero. The intermediate station does not multiplex its own data in the frame F2 (does not set the ready bit). However, in this case, the flag “1” of the down route abnormality of the frame F2 is set because of the down route abnormality. The devices subsequent to the intermediate station receiving the reconstructed multiframe do not multiplex their own data in the flag F3 in view of the unreadiness.
【０００７】図１０（ｂ）について、３０ＬＰＢＴ（ル
ーブバックタイマ動作）（２秒）経過後、中間局は仮親
局に遷移し、マルチフレームＦ２を送信する。その他、
親局は仮親局に、折り返し局は仮折り返し局に遷移す
る。Referring to FIG. 10B, after 30 LPBT (lubeback timer operation) (2 seconds) has elapsed, the intermediate station transits to the temporary master station and transmits a multi-frame F2. Others
The parent station changes to a temporary master station, and the return station changes to a temporary return station.
【０００８】断線箇所が予備ルート扱いになるので、全
フレームのレディビットを多重するようになる。ただ
し、各仮親局では仮折り返し局からの情報が初期設定と
一致（フレームＦ１が親局ではフレームＦ３が折り返し
局、フレームＦ２が親局ではフレームＦ１が折り返し局
であることを、共通フレームを使って親局へ返答する設
定となっている）しないため、全局同期確立には至らな
い。[0008] Since the broken part is treated as a spare route, ready bits of all frames are multiplexed. However, in each provisional master station, the information from the provisional return station matches the initial setting (using the common frame that the frame F3 is the return station in the case of the frame F1 and the frame F1 is the return station in the case of the frame F2). Is set to reply to the master station), so that all-station synchronization is not established.
【０００９】伝送不良発生から３０ＭＴ（伝送不良出力
タイマ動作）（５秒）経過後、装置は伝送不良を検出
し、異常表示、警報出力及び伝送不良検出出力によりト
リップロックを実施する。After a lapse of 30 MT (transmission failure output timer operation) (5 seconds) from the occurrence of the transmission failure, the apparatus detects the transmission failure, and performs trip lock based on the abnormal display, the alarm output, and the transmission failure detection output.
【００１０】断線が復旧すると、後方保護時間後、仮親
局は下りルート異常のフラグをリセットし、各局は同期
の取り直しを行う。When the disconnection is restored, after the backward protection time, the temporary master station resets the flag of the down route abnormality, and each station performs synchronization again.
【００１１】また、伝送路異常対策として図１１に示す
ように、親局Ａと折り返し局Ｅとの間に予備伝送路を設
けたものがある。これは例えば中間局Ｃが故障の場合、
局Ａ→Ｂ→Ａ→予備伝送路下り→局Ｅ→Ｄ→Ｅ→予備伝
送路上り→局Ａのループ伝送路を構成するものである。Further, as a countermeasure against transmission path abnormality, there is an apparatus in which a backup transmission path is provided between a master station A and a return station E as shown in FIG. This means that, for example, if the intermediate station C fails,
Station A → B → A → downline of standby transmission line → station E → D → E → upline of standby transmission line → loop transmission line of station A.
【００１２】また、各局のサンプリング同期信号を得る
方法として、図１２に示すように各局がＧＰＳが備える
人工衛星から発振されている時刻情報として１分周期や
１秒周期のパルスをアンテナを通じてＧＰＳ受信機ＧＰ
ＳA〜ＧＰＳBで受信し、図３に示すようにＧＰＳが１秒
毎に生成するクロック１ｐｐｓを逓倍してサンプリング
のクロックを作り常に絶対時間によってデータのサンプ
リングを行う方式がある（特願平９−３５５９７９
号）。As a method of obtaining a sampling synchronization signal of each station, as shown in FIG. 12, each station receives a pulse having a one-minute or one-second cycle as time information oscillated from an artificial satellite provided in the GPS through an antenna. Machine GP
There is a method in which the data is received by S A to GPS B , a sampling clock is generated by multiplying the clock 1 pps generated every second by the GPS as shown in FIG. 9-3557979
issue).
【００１３】ＧＰＳが１秒毎に生成するクロック１ｐｐ
ｓのパルスずれの標準偏差は５０ｎｓｅｅ以下で、実質
的には１μｓ以下のずれしか生じない。従って、各局は
時間情報を送受信しなくても１μｓ以内の誤差で共通の
時計を持つことになり、電力系統の電圧，電流データの
サンプリングが可能となる。1 pp clock generated by the GPS every second
The standard deviation of the pulse shift of s is 50 nsee or less, and substantially only a shift of 1 μs or less occurs. Therefore, each station has a common clock with an error of 1 μs or less without transmitting and receiving time information, and voltage and current data of the power system can be sampled.
【００１４】[0014]
【発明が解決しようとする課題】ディジタル光ＰＣＭ電
流差動保護継電装置は、専用の光ファイバー伝送路を使
用して、電流情報のサンプリング同期を取っている。伝
送路に障害が発生した場合、伝送路が確保できなくなる
と、同期が保証されなくなる。当然電流情報のサンプリ
ング同期保証がなく、電流差動リレーは誤動作を起こす
可能性が出てくる。そのため、伝送路異常が発生する
と、主保護リレーの機能をロックし、後備保護リレーな
どに保護を委ねることになる。The digital optical PCM current differential protection relay uses a dedicated optical fiber transmission line to synchronize sampling of current information. When a failure occurs in the transmission path, if the transmission path cannot be secured, synchronization cannot be guaranteed. Naturally, there is no guarantee of sampling synchronization of current information, and the current differential relay may malfunction. Therefore, when a transmission line abnormality occurs, the function of the main protection relay is locked, and protection is entrusted to a rear protection relay or the like.
【００１５】従来は伝送路異状が検出された時点で中間
局は検出したエラーを修復し、そのフレームの電流デー
タを電流零にし、一定時間後に復旧しなければ全ての局
をトリップロックし、後備保護リレーに動作を委ね、断
線が復帰すると一定時間経過後に各局は同期の取り直し
を行うという動作を行うようになっている。Conventionally, when a transmission line abnormality is detected, the intermediate station corrects the detected error, sets the current data of the frame to zero current, trip locks all the stations if the recovery is not made after a predetermined time, and prepares for the backup. The operation is entrusted to the protection relay, and when the disconnection is restored, each station performs an operation of reestablishing synchronization after a lapse of a predetermined time.
【００１６】この発明は、上記課題に鑑みてなされたも
のであり、その目的とするところは、伝送路異常が発生
した場合、その下流側の局では上流側の局からの電流情
報が電流零になると常時の負荷電流を考慮した特性へ整
定値を変更し、主保護リレーの性能を落として主保護リ
レーロックと主保護リレーの誤動作を防止するようにし
た光ＰＣＭ電流差動リレー方式を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a system in which, when a transmission line abnormality occurs, current information from an upstream station is zero at a downstream station. Provided is an optical PCM current differential relay system that changes the set value to a characteristic that takes into account the constant load current, reduces the performance of the main protection relay, and prevents malfunction of the main protection relay lock and main protection relay. Is to do.
【００１７】[0017]
【課題を解決するための手段】この発明は、親局，中間
局，折り返し局をそれぞれ下り伝送路及び上り伝送路で
接続し、親局から親局で作成した送信タイミングで送信
する伝送フレームに各局の電流情報を付加し、各局は折
り返される伝送フレームの電流情報と自局主保護リレー
の整定値に基づいて電力系統の保護を行う光ＰＣＭ電流
差動リレーにおいて、各局にＧＰＳ受信器を設け、伝送
路障害発生時障害発生直下流の局はＧＰＳ時による送信
タイミングで障害発生上流側局の電流情報の電流を零に
した伝送フレームを下流側へ送信し、前記障害発生下流
側の各局は伝送路障害発生検知または上流側局の電流情
報零の場合、それぞれ自局の主保護リレーの整定値の変
更を行うことにより主保護リレーロック条件を変更し、
主保護リレーの機能を維持するものである。According to the present invention, a master station, an intermediate station, and a return station are connected by a downlink transmission path and an uplink transmission path, respectively, and a transmission frame transmitted from the master station at a transmission timing created by the master station is provided. In each of the optical PCM current differential relays, which adds the current information of each station and protects the power system based on the current information of the transmission frame to be turned back and the set value of the local main protection relay, each station is provided with a GPS receiver. In the event of a transmission path failure, the station immediately downstream of the failure transmits a transmission frame in which the current of the current information of the upstream station having the failure becomes zero to the downstream at the transmission timing according to GPS, and each of the stations on the downstream side of the failure has In the case of transmission line fault detection or when the current information of the upstream station is zero, the main protection relay lock condition is changed by changing the set value of the main protection relay of the own station,
The function of the main protection relay is maintained.
【００１８】また、伝送路異常の検出または上流側の局
の電流情報が電流零の場合、伝送路異常の下流側の局は
主保護リレー整定値を電流情報が電流零の局の常時の負
荷電流を考慮した整定値に変更し、主保護リレーの誤作
動を防止する。Further, when the transmission line abnormality is detected or the current information of the station on the upstream side is zero current, the station on the downstream side of the transmission line abnormality sets the main protection relay setting value to the constant load of the station whose current information is zero current. Change to a set value that takes current into account to prevent malfunction of the main protection relay.
【００１９】また、伝送フレーム中の電流情報が電流零
の場合、伝送路異常の上流側の局はメモリー上に保存し
ておいた電流情報を伝送フレームに書き込み、主保護リ
レーの誤作動を防止する。When the current information in the transmission frame is zero current, the station on the upstream side of the transmission path abnormality writes the current information stored in the memory into the transmission frame to prevent the main protection relay from malfunctioning. I do.
【００２０】また、伝送路異常から復帰すると上記変更
した整定値を伝送路障害以前に戻し、伝送路異常発生以
前の状態に復帰させ、主保護リレーの誤作動を防止す
る。Further, when returning from the transmission path abnormality, the changed set value is returned to the state before the transmission path failure and returned to the state before the transmission path abnormality occurred, thereby preventing malfunction of the main protection relay.
【００２１】また、伝送路障害による主保護リレーのロ
ック条件による自端子をＯＣ化（過電流要素化）により
保護する。Further, the terminal itself is protected by OC (overcurrent element) according to the lock condition of the main protection relay due to a transmission path failure.
【００２２】[0022]
【発明の実施の形態】図１にディジタル光ＰＣＭ電流差
動保護リレーの系統での構成を示す。図１の構成におい
て、 各局Ａ〜Ｅで常時計測する差電流はそれぞれ零とな
る。 事故時に流れる差電流は常時負荷電流より遥かに大き
い。 この発明は上記二点を利用して伝送路異常による主保護
リレー（電流差動保護継電装置）の誤動作を防止する。
ディジタル光ＰＣＭ電流差動保護継電装置としてはＧＰ
Ｓを利用したもの（図１２）を使用する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the configuration of a digital optical PCM current differential protection relay system. In the configuration of FIG. 1, the difference current constantly measured by each of the stations A to E becomes zero. The difference current flowing during an accident is always much larger than the load current. The present invention utilizes the above two points to prevent a malfunction of a main protection relay (current differential protection relay) due to a transmission line abnormality.
GP as digital optical PCM current differential protection relay
The one using S (FIG. 12) is used.
【００２３】１．図２に示すように、系統事故でなく伝
送路異常が親局Ａと中間局Ｂ間の下り伝送路で発生した
場合 中間局Ｂの動作 伝送路異状直後の中間局Ｂは、上流側の親局Ａの電流情
報を電流零にした伝送フレームを下流側へ送信する。こ
の伝送路異常後の送信タイミングはＧＰＳ受信機ＧＰＳ
Bで受信したＧＰＳ時により作成する。1. As shown in FIG. 2, when a transmission line abnormality occurs on the downstream transmission line between the master station A and the intermediate station B instead of a system fault, the operation of the intermediate station B The intermediate station B immediately after the transmission path abnormality is the upstream master station. The transmission frame in which the current information of the station A is set to zero current is transmitted to the downstream side. The transmission timing after this transmission path abnormality is the GPS receiver GPS
Created based on the GPS time received by B.
【００２４】この場合、親局Ａの電流情報が零であるか
ら、親局Ａを常時流れる負荷電流程度の差電流では主保
護リレーが動作しないように局Ｂの主保護リレーの整定
値を変更し、主保護リレーの誤動作を防止する。伝送路
復旧後は送信タイミングは伝送路の周期信号により、整
定値も伝送路異常前に戻す。In this case, since the current information of the master station A is zero, the set value of the main protection relay of the station B is changed so that the main protection relay does not operate with a difference current of about the load current that always flows through the master station A. And prevents malfunction of the main protection relay. After the transmission path is restored, the transmission timing is returned by the transmission path periodic signal, and the set value is returned to the value before the transmission path abnormality.
【００２５】中間局Ｃ，Ｄ及び折り返し局Ｅの動作 中間局Ｂより下流の局Ｃ，Ｄ，Ｅでは上流側の局Ａ，Ｂ
の電流情報のうち親局Ａの電流情報が零であることか
ら、局Ａ，Ｂ間で伝送路異常発生と判断し、主保護リレ
ーの整定値を親局Ａを常時流れる負荷電流程度の差電流
では主保護リレーが動作しないように局Ｃ〜Ｅでの主保
護リレーの整定値を変更する。Operations of Intermediate Stations C and D and Return Station E Stations C, D and E downstream of the intermediate station B are upstream stations A and B.
Since the current information of the master station A is zero among the current information of the master station A, it is determined that a transmission line abnormality has occurred between the stations A and B, and the set value of the main protection relay is set to the difference of about the load current that always flows through the master station A. The setting value of the main protection relay at the stations C to E is changed so that the main protection relay does not operate with the current.
【００２６】局Ｃ〜Ｅは事故直後局でないため、送信タ
イミングは局ＢのＧＰＳ時によることになるが、局Ｃ〜
Ｅからみると伝送路の同期信号に変わりないため、特別
の動作は行わない。Since the stations CE are not stations immediately after the accident, the transmission timing depends on the GPS time of the station B.
From the viewpoint of E, no special operation is performed because the signal does not change to the synchronization signal of the transmission line.
【００２７】伝送路が復旧すると、親局Ａの電流情報が
電流零でなくなるので、再び主保護リレーの整定値を元
に戻す。送信タイミングは中間局ＢのＧＰＳ時から作っ
たものから親局Ａの作ったタイミングになるが、局Ｃ〜
Ｅから見るとどちらも伝送路の同期信号であるため、特
別な動作は行わない。When the transmission path is restored, the current information of the master station A is no longer zero, so that the set value of the main protection relay is returned to the original value. The transmission timing is the timing created by the master station A from the one created from the GPS of the intermediate station B.
As seen from E, no special operation is performed because both are synchronization signals of the transmission path.
【００２８】親局Ａの動作 親局Ａは伝送路異常より上流にあり、上り伝送路から受
信したフレーム上の自身の電流データが電流零であるた
め、メモリー上に保存しておいた電流データと電流零と
を差し替え、伝送路異常に関係なく主保護リレーの機能
を維持する。Operation of the master station A Since the master station A is located upstream of the transmission line abnormality and its current data on the frame received from the upstream transmission line is zero current, the current data stored in the memory is stored. And the current is replaced with zero, and the function of the main protection relay is maintained regardless of the transmission line abnormality.
【００２９】図３に中間局，折り返し局内でのクロック
生成のフローを、図４に上記伝送路異常時の各局間の電
流情報の流れを示す。FIG. 3 shows a flow of clock generation in the intermediate station and the return station, and FIG. 4 shows a flow of current information between the respective stations when the transmission line is abnormal.
【００３０】２．図５に示すように、伝送路異常が中間
局Ｂ，Ｃ間の下り伝送路で発生した場合 中間局Ｃの動作 伝送路異状直後の中間局Ｃは、上流側の局Ａ，Ｂの電流
情報を電流零にした伝送フレームを下流側へ送信する。
この伝送路異常後の送信タイミングはＧＰＳ受信機ＧＰ
ＳCで受信したＧＰＳ時により作成する。2. As shown in FIG. 5, when a transmission line abnormality occurs in the downstream transmission line between the intermediate stations B and C. Operation of the intermediate station C The intermediate station C immediately after the transmission path abnormality has the current information of the upstream stations A and B. Is transmitted to the downstream side with zero current.
The transmission timing after this transmission path abnormality is GPS receiver GP
To create the GPS time received in S C.
【００３１】この場合、局Ａ，Ｂの電流情報が零である
から、局Ａ，Ｂを常時流れる負荷電流程度の差電流では
主保護リレーが動作しないように局Ｃの主保護リレーの
整定値を変更し、主保護リレーの誤動作を防止する。伝
送路復旧後は送信タイミングは伝送路の同期信号によ
り、また、整定値も伝送路異常前に戻す。In this case, since the current information of the stations A and B is zero, the set value of the main protection relay of the station C is set so that the main protection relay does not operate with a difference current of about the load current flowing constantly through the stations A and B. To prevent malfunction of the main protection relay. After the restoration of the transmission path, the transmission timing is returned by the synchronization signal of the transmission path, and the set value is also returned to the value before the transmission path abnormality.
【００３２】中間局Ｄ及び折り返し局Ｅの動作 中間局Ｃより下流の局Ｄ，Ｅでは上流側の局Ａ，Ｂ，Ｃ
の電流情報のうち局Ａ，Ｂの電流情報が零であることか
ら、局Ｂ，Ｃ間で伝送路異常発生と判断し、主保護リレ
ーの整定値を局Ａ，Ｂを常時流れる負荷電流程度の差電
流では主保護リレーが動作しないように局Ｄ，Ｅでの主
保護リレーの整定値を変更する。Operations of the intermediate station D and the return station E In the stations D and E downstream from the intermediate station C, the upstream stations A, B and C
Since the current information of the stations A and B among the current information of the stations A and B is zero, it is determined that a transmission line abnormality has occurred between the stations B and C, and the set value of the main protection relay is set to about the load current constantly flowing through the stations A and B. The setting value of the main protection relay at the stations D and E is changed so that the main protection relay does not operate at the difference current of.
【００３３】局Ｄ，Ｅは事故直後局でないため、送信タ
イミングは局ＣのＧＰＳ時によることになるが、局Ｄ，
Ｅからみると伝送路の同期信号に変わりないため、特別
の動作は行わない。Since the stations D and E are not stations immediately after the accident, the transmission timing depends on the GPS time of the station C.
From the viewpoint of E, no special operation is performed because the signal does not change to the synchronization signal of the transmission line.
【００３４】伝送路が復旧すると、親局Ａ，Ｂの電流情
報が電流零でなくなるので、再び主保護リレーの整定値
を元に戻す。送信タイミングは中間局ＣのＧＰＳ時から
作ったものから親局Ａの作ったタイミングになるが、局
Ｄ，Ｅから見るとどちらも伝送路の同期信号であるた
め、特別な動作は行わない。When the transmission path is restored, the current information of the master stations A and B is no longer zero, so the set value of the main protection relay is restored to the original value. The transmission timing is the timing created by the master station A from the one created from the GPS of the intermediate station C, but from the viewpoint of the stations D and E, since both are synchronization signals of the transmission line, no special operation is performed.
【００３５】中間局Ｂの動作 伝送路異常の直上の局Ｂは、上り伝送路から受信したフ
レーム上の自身の電流データが電流零であるため、メモ
リー上に保存しておいた自局電流データと親局Ａの電流
データを伝送フレーム上の電流零と差し替えて上り伝送
路の伝送フレームに送信し、伝送路異常に関係なく、精
度を落とすことなく主保護リレーの機能を維持する。Operation of Intermediate Station B Since the current data of the station B immediately above the transmission line abnormality on the frame received from the upstream transmission line is zero current, the local station B stored in the memory Then, the current data of the master station A is replaced with the current zero on the transmission frame and transmitted to the transmission frame of the upstream transmission line, and the function of the main protection relay is maintained without lowering the accuracy regardless of the transmission line abnormality.
【００３６】親局Ａの動作 中間局Ｂが伝送路異常フレームを修復しているため、伝
送フレームの電流情報を用いて、精度を落とすことなく
主保護リレーの機能を維持する。Operation of the master station A Since the intermediate station B has repaired the transmission line abnormal frame, the function of the main protection relay is maintained without lowering the accuracy by using the current information of the transmission frame.
【００３７】３．図６に示すように、伝送路異常が中間
局Ｃ，Ｄ間の下り伝送路で発生した場合 中間局Ｄの動作 伝送路異状直後の中間局Ｄは、上流側の局Ａ，Ｂ，Ｃの
電流情報を電流零にした伝送フレームを下流側へ送信す
る。この伝送路異常後の送信タイミングはＧＰＳ受信機
ＧＰＳDで受信したＧＰＳ時により作成する。3. As shown in FIG. 6, when a transmission line abnormality occurs in the downstream transmission line between the intermediate stations C and D. Operation of the intermediate station D The intermediate station D immediately after the transmission path abnormality is the same as that of the upstream stations A, B and C. A transmission frame in which the current information is reduced to zero current is transmitted to the downstream side. Transmission timing after the transmission path abnormality is made by the time of GPS received by the GPS receiver GPS D.
【００３８】この場合、局Ａ，Ｂ，Ｃの電流情報が零で
あるから、局Ａ，Ｂ，Ｃを常時流れる負荷電流程度の差
電流では主保護リレーが動作しないように局Ｄの主保護
リレーの整定値を変更し、主保護リレーの誤動作を防止
する。伝送路復旧後は送信タイミングは伝送路の周期信
号により、整定値も伝送路異常前に戻す。In this case, since the current information of the stations A, B, and C is zero, the main protection relay of the station D is operated so that the main protection relay does not operate with a difference current of about the load current flowing constantly through the stations A, B, and C. Change the set value of the relay to prevent malfunction of the main protection relay. After the transmission path is restored, the transmission timing is returned by the transmission path periodic signal, and the set value is also returned to the value before the transmission path abnormality.
【００３９】折り返し局Ｅの動作 中間局Ｄより下流の折り返し局Ｅでは上流側の局Ａ，
Ｂ，Ｃ，Ｄの電流情報のうち局Ａ，Ｂ，Ｃの電流情報が
零であることから、局Ｃ，Ｄ間で伝送路異常発生と判断
し、主保護リレーの整定値を局Ａ，Ｂ，Ｃを常時流れる
負荷電流程度の差電流では主保護リレーが動作しないよ
うに局Ｄでの主保護リレーの整定値を変更する。Operation of the return station E In the return station E downstream of the intermediate station D, the upstream stations A,
Since the current information of the stations A, B, and C among the current information of B, C, and D is zero, it is determined that a transmission line abnormality has occurred between the stations C and D, and the set value of the main protection relay is set to the stations A and B. The setting value of the main protection relay at the station D is changed so that the main protection relay does not operate with a difference current of about the load current that always flows through B and C.
【００４０】局Ｅは事故直後局でないため、送信タイミ
ングは局ＤのＧＰＳ時によることになるが、局Ｅからみ
ると伝送路の同期信号に変わりないため、特別の動作は
行わない。Since the station E is not the station immediately after the accident, the transmission timing depends on the GPS time of the station D. However, from the point of view of the station E, no special operation is performed since it does not change to the synchronization signal of the transmission line.
【００４１】伝送路が復旧すると、親局Ａ，Ｂ，Ｃの電
流情報が電流零でなくなるので、再び主保護リレーの整
定値を元に戻す。送信タイミングは中間局ＤのＧＰＳ時
から作ったものから親局Ａの作ったタイミングになる
が、局Ｅから見るとどちらも伝送路の同期信号であるた
め、特別な動作は行わない。When the transmission path is restored, the current information of the master stations A, B, and C is no longer zero, so that the set value of the main protection relay is returned to the original value. The transmission timing is the timing created by the master station A from the one created from the GPS of the intermediate station D, but from the viewpoint of the station E, no special operation is performed because both are synchronization signals of the transmission line.
【００４２】中間局Ｃの動作 伝送路異常の直上の局Ｃは上り伝送路から受信した伝送
フレーム上の自身の電流データが電流零であるため、メ
モリー上に保存しておいた自局電流データと中間局Ｂ、
親局Ａの電流データを伝送フレーム上の電流零と差し替
えて伝送フレームに送信し、伝送異常に関係なく、精度
を落とすことなく主保護リレーの機能を維持する。Operation of the Intermediate Station C Since the current data of the station C immediately above the transmission line abnormality on the transmission frame received from the upstream transmission line is zero current, the local station current data stored in the memory is stored. And intermediate station B,
The current data of the master station A is replaced with zero current on the transmission frame and transmitted to the transmission frame, and the function of the main protection relay is maintained regardless of the transmission abnormality without lowering the accuracy.
【００４３】親局Ａ，中間局Ｂの動作 伝送路異常の直上の局Ｃが伝送路異常フレームを修復し
ているため、局Ａ，Ｂは伝送フレームの電流情報を用い
て、精度を落とすことなく主保護の機能を維持する。Operations of the master station A and the intermediate station B Since the station C immediately above the transmission path abnormality has repaired the transmission path abnormal frame, the stations A and B use the current information of the transmission frame to reduce the accuracy. Without maintaining the function of the main protection.
【００４４】４．図７に示すように、伝送路異常がＤと
Ｅ間の下り伝送路で発生した場合 折り返しＥの動作 伝送路異状直後の折り返し局Ｅは、上流側の中間局Ｄの
電流情報を電流零にした伝送フレームを下流側へ送信す
る。この伝送路異常後の送信タイミングはＧＰＳ受信機
ＧＰＳEで受信したＧＰＳ時により作成する。4. As shown in FIG. 7, when a transmission line abnormality occurs in the downstream transmission line between D and E. Operation of loopback E The loopback station E immediately after the fault of the transmission line converts the current information of the intermediate station D on the upstream side to zero current. The transmitted transmission frame is transmitted to the downstream side. Transmission timing after the transmission path abnormality is made by the time of GPS received by the GPS receiver GPS E.
【００４５】この場合、局Ａ，Ｂ，Ｃ，Ｄの電流情報が
零であるから、局Ａ，Ｂ，Ｃ，Ｄを常時流れる負荷電流
程度の差電流では主保護リレーが動作しないように局Ｆ
の主保護リレーの整定値を変更し、主保護リレーの誤動
作を防止する。伝送路復旧後は送信タイミングは伝送路
の周期信号により、整定値も伝送路異常前に戻す。In this case, the current information of the stations A, B, C, and D is zero, so that the main protection relay does not operate with a difference current of about the load current that always flows through the stations A, B, C, and D. F
Change the set value of the main protection relay to prevent malfunction of the main protection relay. After the transmission path is restored, the transmission timing is returned by the transmission path periodic signal, and the set value is returned to the value before the transmission path abnormality.
【００４６】中間局Ｄの動作 伝送路異常の直上の中間局Ｄは、上り伝送路から受信し
た伝送フレーム上の自身の電流データが電流零であるた
め、メモリー上に保存しておいた自局電流データと中間
局Ｃ，Ｂ及び親局の電流データを伝送フレーム上の電流
零とを差し替えて伝送フレームに送信し、伝送路異常に
関係なく、精度を落とすことなく主保護リレーの機能を
維持する。Operation of Intermediate Station D Since the current data of the intermediate station D immediately above the transmission line abnormality on the transmission frame received from the upstream transmission line is zero current, the intermediate station D stored in the memory The current data and the current data of the intermediate stations C and B and the master station are replaced with zero current on the transmission frame and transmitted to the transmission frame, and the function of the main protection relay is maintained regardless of the transmission path abnormality without lowering the accuracy. I do.
【００４７】親局Ａ，中間局Ｂ，Ｃの動作 中間局Ｄが伝送路異常フレームを修復しているため、局
Ａ，Ｂ，Ｃは伝送フレームの電流情報を用いて、精度を
落とすことなく主保護リレーの機能を維持する。Operations of Master Stations A, Intermediate Stations B, and C Since the intermediate station D has repaired the transmission line abnormal frame, the stations A, B, and C can use the current information of the transmission frame without lowering the accuracy. Maintain the function of the main protection relay.
【００４８】実施の形態によれば、伝送路障害が発生し
ても、サンプリング同期がＧＰＳの時計を利用すること
によって継続できるＧＰＳを利用した光ＰＣＭ電流差動
保護継電装置において、伝送路異状を検出した時点で伝
送路異常の下流側の局では整定値の変更を行うことによ
り差動継電器ロックの条件を変更するので、トリップロ
ックを行わず、つまり後備保護リレーに保護を委ねず、
保持性能の低下を許容しても主保護リレーの機能を維持
することができる。According to the embodiment, in the optical PCM current differential protection relay device using GPS, sampling synchronization can be continued by using a GPS clock even if a transmission line failure occurs. At the point of detection, the station on the downstream side of the transmission line abnormality changes the setting value of the differential relay by changing the set value, so the trip lock is not performed, that is, the protection is not delegated to the back-up protection relay,
The function of the main protection relay can be maintained even if the holding performance is allowed to decrease.
【００４９】また、伝送路異常の直上の局ではメモリー
上に保存した自局電流データと上流側局の電流データを
伝送フレーム上の電流零と差し替えて伝送フレームに送
信しているので、伝送路異常の上流側局では整定値を変
更せずに主保護リレーの機能を維持できる。Also, the station immediately above the transmission line abnormality replaces the current data of its own station stored in the memory and the current data of the upstream station with the current zero on the transmission frame and transmits the data to the transmission frame. The function of the main protection relay can be maintained without changing the set value in the station on the upstream side of the abnormality.
【００５０】[0050]
【発明の効果】この発明は、上述のとおり構成されてい
るので、下記の効果を奏する。Since the present invention is configured as described above, it has the following effects.
【００５１】（１）伝送路異常を検出した時点で伝送路
異常の下流側の局では整定値の変更を行うことにより差
動リレーロックの条件を変更し、後備保護リレーに保護
を委ねず、主保護リレー性能の低下を許容しても主保護
リレーの機能を維持することができる。(1) When a transmission line abnormality is detected, the station on the downstream side of the transmission line abnormality changes the setting of the differential relay lock by changing the set value, and the protection is not delegated to the backup protection relay. Even if the performance of the main protection relay is allowed to decrease, the function of the main protection relay can be maintained.
【００５２】（２）また伝送路異常の上流側ではメモリ
ー上に保存したデータを利用することにより整定値を変
更せずに主保護リレーの機能を維持できる。(2) On the upstream side of the transmission path abnormality, the function of the main protection relay can be maintained without changing the set value by using the data stored in the memory.
【図１】ディジタル光ＰＣＭ電流差動保護リレーの系統
での構成図。FIG. 1 is a configuration diagram of a digital optical PCM current differential protection relay system.
【図２】ＧＰＳを利用したディジタル光ＰＣＭ電流差動
保護リレーの局Ａ，Ｂ間の伝送路異常を示す図。FIG. 2 is a diagram showing a transmission path abnormality between stations A and B of a digital optical PCM current differential protection relay using GPS.
【図３】中間局・折り返し局内でのクロックの生成フロ
ー図。FIG. 3 is a flowchart for generating a clock in the intermediate station and the return station.
【図４】伝送路異常時の各局間の電流情報の流れを示す
線図。FIG. 4 is a diagram showing a flow of current information between stations when a transmission line is abnormal.
【図５】ＧＰＳを利用したディジタル光ＰＣＭ電流差動
保護リレーの局Ｂ，Ｃ間の伝送路異常を示す図。FIG. 5 is a diagram showing a transmission path abnormality between stations B and C of a digital optical PCM current differential protection relay using GPS.
【図６】ＧＰＳを利用したディジタル光ＰＣＭ電流差動
保護リレーの局Ｃ，Ｄ間の伝送路異常を示す図。FIG. 6 is a diagram showing a transmission path abnormality between stations C and D of a digital optical PCM current differential protection relay using GPS.
【図７】ＧＰＳを利用したディジタル光ＰＣＭ電流差動
保護リレーの局Ｄ，Ｅ間の伝送路異常を示す図。FIG. 7 is a diagram showing a transmission path abnormality between stations D and E of a digital optical PCM current differential protection relay using GPS.
【図８】従来例にかかる光ＰＣＭ電流差動保護継電装置
構成図。FIG. 8 is a configuration diagram of an optical PCM current differential protection relay device according to a conventional example.
【図９】情報の流れと同期タイミングとの関係を示す線
図。FIG. 9 is a diagram showing the relationship between information flow and synchronization timing.
【図１０】伝送不良時の処理手順説明図。FIG. 10 is an explanatory diagram of a processing procedure at the time of transmission failure.
【図１１】従来例にかかる伝送路異常対策を示した光Ｐ
ＣＭ電流差動保護継電装置構成図。FIG. 11 is a diagram showing a light P showing a countermeasure for a transmission line abnormality according to a conventional example.
FIG. 3 is a configuration diagram of a CM current differential protection relay device.
【図１２】従来例にかかるＧＰＳを利用した光ＰＣＭ電
流保護継電装置構成図。FIG. 12 is a configuration diagram of an optical PCM current protection relay device using GPS according to a conventional example.
【図１３】ＧＰＳによる同期信号のタイミング図。FIG. 13 is a timing chart of a synchronization signal by GPS.
Ａ〜Ｅ…局 ＧＰＳ，ＧＰＳA〜ＧＰＳE…ＧＰＳ受信器A to E ... stations GPS, GPS A to GPS E ... GPS receivers
Claims (5)
り伝送路及び上り伝送路で接続し、親局から親局で作成
した送信タイミングで送信する伝送フレームに各局の電
流情報を付加し、各局は折り返される伝送フレームの電
流情報と自局主保護リレーの整定値に基づいて電力系統
の保護を行う光ＰＣＭ電流差動リレーにおいて、 各局にＧＰＳ受信器を設け、伝送路障害発生時障害発生
直下流の局はＧＰＳ時による送信タイミングで障害発生
上流側局の電流情報の電流を零にした伝送フレームを下
流側へ送信し、 前記障害発生下流側の各局は伝送路障害発生検知または
上流側局の電流情報零の場合、それぞれ自局主保護リレ
ーの整定値を変更し、主保護リレーの機能を維持するこ
とを特徴とする光ＰＣＭ電流差動リレー方式。1. A master station, an intermediate station, and a return station are connected by a downlink transmission path and an uplink transmission path, respectively, and current information of each station is added to a transmission frame transmitted from the master station at a transmission timing created by the master station. Each station is equipped with a GPS receiver in each optical PCM current differential relay that protects the power system based on the current information of the transmission frame to be looped back and the set value of the local main protection relay. The immediately downstream station transmits a transmission frame in which the current of the current information of the faulty upstream station is reduced to zero at the transmission timing according to GPS to the downstream side, and each of the stations on the downstream side where the fault occurs detects the transmission path fault occurrence or the upstream side. An optical PCM current differential relay system characterized in that when the current information of the station is zero, the set value of the main protection relay is changed to maintain the function of the main protection relay.
流情報が電流零の場合、伝送路異常の下流側の局は主保
護リレーの整定値を電流情報が電流零の局の常時の負荷
電流を考慮した整定値に変更し、主保護リレーの誤作動
を防止することを特徴とする請求項１記載の光ＰＣＭ電
流差動リレー方式。2. When the transmission path abnormality is detected or the current information of the station on the upstream side is zero current, the station on the downstream side of the transmission path abnormality determines the set value of the main protection relay and the normal value of the station whose current information is zero current. 2. The optical PCM current differential relay system according to claim 1, wherein the setting value is changed to a set value in consideration of a load current to prevent a malfunction of the main protection relay.
合、伝送路異常の上流側の局はメモリー上に保存してお
いた電流情報を伝送フレームに書き込み、主保護リレー
の誤作動を防止することを特徴とする請求項１記載の光
ＰＣＭ電流差動リレー方式。3. When the current information in the transmission frame is zero current, the station on the upstream side of the transmission path abnormality writes the current information stored in the memory to the transmission frame to prevent the main protection relay from malfunctioning. 2. The optical PCM current differential relay system according to claim 1, wherein:
整定値を伝送路障害以前に戻し、伝送路異常発生以前の
状態に復帰させ、主保護リレーの誤作動を防止すること
を特徴とする請求項１記載の光ＰＣＭ電流差動リレー方
式。4. The method according to claim 1, wherein upon returning from the transmission path abnormality, the changed set value is returned to a state before the transmission path failure, and returned to a state before the transmission path abnormality occurred, thereby preventing malfunction of the main protection relay. Item 2. An optical PCM current differential relay system according to item 1.
条件による自端子を過電流による保護リレー化により保
護することを特徴とする請求項１記載の光ＰＣＭ電流差
動リレー方式。5. The optical PCM current differential relay system according to claim 1, wherein a terminal of the main protection relay according to a lock condition of the transmission line failure is protected by a protection relay by overcurrent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2949099A JP2000228821A (en) | 1999-02-08 | 1999-02-08 | Optical pcm current differential relay system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2949099A JP2000228821A (en) | 1999-02-08 | 1999-02-08 | Optical pcm current differential relay system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000228821A true JP2000228821A (en) | 2000-08-15 |
Family
ID=12277528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2949099A Pending JP2000228821A (en) | 1999-02-08 | 1999-02-08 | Optical pcm current differential relay system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000228821A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1195876A2 (en) * | 2000-10-06 | 2002-04-10 | Kabushiki Kaisha Toshiba | Digital protective relay system |
| WO2010082284A1 (en) * | 2009-01-19 | 2010-07-22 | 株式会社 東芝 | System and device for protection control instrumentation, and data transmission method |
| US9680297B2 (en) | 2012-06-26 | 2017-06-13 | Mitsubishi Electric Corporation | Current differential relay |
-
1999
- 1999-02-08 JP JP2949099A patent/JP2000228821A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1195876A2 (en) * | 2000-10-06 | 2002-04-10 | Kabushiki Kaisha Toshiba | Digital protective relay system |
| EP1195876A3 (en) * | 2000-10-06 | 2003-09-10 | Kabushiki Kaisha Toshiba | Digital protective relay system |
| WO2010082284A1 (en) * | 2009-01-19 | 2010-07-22 | 株式会社 東芝 | System and device for protection control instrumentation, and data transmission method |
| JP2010166486A (en) * | 2009-01-19 | 2010-07-29 | Toshiba Corp | Protection control measuring system and device and data transfer method |
| US8547201B2 (en) | 2009-01-19 | 2013-10-01 | Kabushiki Kaisha Toshiba | Protective-control measuring system and device and data transmission method |
| US9680297B2 (en) | 2012-06-26 | 2017-06-13 | Mitsubishi Electric Corporation | Current differential relay |
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