JPS6329499B2 - - Google Patents
Info
- Publication number
- JPS6329499B2 JPS6329499B2 JP58062947A JP6294783A JPS6329499B2 JP S6329499 B2 JPS6329499 B2 JP S6329499B2 JP 58062947 A JP58062947 A JP 58062947A JP 6294783 A JP6294783 A JP 6294783A JP S6329499 B2 JPS6329499 B2 JP S6329499B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit breaker
- bus
- parallel
- closing
- power
- 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
- 238000000034 method Methods 0.000 claims description 13
- 238000011084 recovery Methods 0.000 claims description 13
- 238000010248 power generation Methods 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 7
- 238000012795 verification Methods 0.000 claims description 5
- 238000011017 operating method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 101100412098 Schizosaccharomyces pombe (strain 972 / ATCC 24843) rec24 gene Proteins 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Emergency Protection Circuit Devices (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、電力系統における系統事故が発生し
た場合の復旧方式に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a recovery method when a system fault occurs in an electric power system.
第１図のような電力系統において、線路２３に
事故が発生し、遮断器２３―ａ，２４―ａ，２５
―ａがトリツプした場合の従来の系統事故復旧手
順について説明する。再閉路装置（REC）２３
―ｂにより、遮断器２３―ａが投入される。遮断
器２３―ａの再閉路成功により遮断器２４―ａ，
２５―ａの再閉路が再閉路装置２４―ｂ，２５―
ｂによつて行なわれる。以上の動作により系統復
旧が行なわれるわけである。ただし２８，２９の
発電機が運転中で２６，２７の線路に電圧がある
ような場合の系統並列操作時には、同期検定装置
の設定されていない遮断器２４―ａ，２５―ａで
は、再閉路実施の条件にならないのが一般であ
り、そのまま時間が経過した場合にはREC２４
―ｂ，２５―ｂが条件不成立になり、以降の復旧
操作は人手により行なわなければならないような
場合も発生する。それを防ぐため、制御所の運転
員は、RECの条件不成立となる前に、制御所内
に設置された遠方監視制御装置TCの操作卓を使
用し、発変電所側TCにより遮断器２８―ａ，２
９―ａをトリツプさせ、REC２４―ｂ，２５―
ｂの再閉路の実施可能条件を作り、遮断器２４―
ａ，２５―ａの再閉路を行なわせる。遮断器２８
―ａ，２９―ａは一般的に同期検定装置が設置さ
れていることから線路２６，２７に電圧発生後、
線路電源との同期を待ち、自動投入される。以上
により、系統復旧の状態となるわけである。
In the power system shown in Figure 1, an accident occurs on the line 23, and the circuit breakers 23-a, 24-a, 25
- We will explain the conventional system fault recovery procedure when a trips. Reclosing device (REC) 23
-b turns on the circuit breaker 23-a. Due to the successful re-closing of the circuit breaker 23-a, the circuit breaker 24-a,
The reclosing circuit of 25-a is the reclosing device 24-b, 25-
This is done by b. Grid restoration is performed through the above operations. However, during system parallel operation when the generators 28 and 29 are in operation and there is voltage on the lines 26 and 27, the circuit breakers 24-a and 25-a, which are not equipped with a synchronization verification device, cannot be reclosed. Generally, it is not a condition for implementation, and if the time elapses, REC24
-b, 25-b become unsatisfied, and subsequent recovery operations may have to be performed manually. In order to prevent this, the control center operator uses the operation console of the remote monitoring and control device TC installed in the control center and uses the TC on the power generation and substation side to interrupt the circuit breaker 28-a before the REC conditions are not met. ,2
Trip 9-a, REC24-b, 25-
Create conditions that enable re-closing of circuit breaker 24-
a, 25-a are reclosed. Circuit breaker 28
-a and 29-a are generally equipped with a synchronization verification device, so after voltage is generated on lines 26 and 27,
It waits for synchronization with the line power supply and turns on automatically. As a result of the above, the system is in a state of grid restoration.
このような復旧方式では、事故状況の判定、遮
断器２４―ａ，２５―ａのトリツプ操作等で制御
所運転員の負担が大きくなり、系統がもつと大き
くなるような場合には、復旧操作での運転員の負
担がより大きくなり、系統復旧が遅れたり運転員
の誤操作が原因で系統事故の拡大も招くことにな
る。またREC２４―ｂ，２５―ｂが条件不成立
になり再閉路出来なくなつた場合、条件不成立の
原因の解明について、各電気所の機器状態、及び
電圧等の条件をチエツクし、判断する必要がある
ため時間がかかり、全体の復旧操作が遅れるとい
うこともあつた。 In this type of recovery method, the burden on control center operators is large due to determining the accident situation, tripping circuit breakers 24-a and 25-a, etc., and when the system becomes large, recovery operations are necessary. This will place a greater burden on operators, delay grid restoration, and lead to more grid accidents due to operator errors. In addition, if conditions for REC24-b and 25-b do not hold and the circuit cannot be reclosed, it is necessary to check the equipment status of each electrical station and conditions such as voltage to determine the cause of the condition not being satisfied. This took time and sometimes delayed the entire recovery operation.
本発明の目的は事故復旧時の制御所運転員及び
各電気所運転員の負担の軽減を計ると共に電力系
統が大きくなつた場合でも、全ての系統遮断器に
RECを設置することなく、主要系統部分の遮断
器にRECを設けるだけで復旧操作が出来るよう
にした電力系統復旧方式を提供することにある。
The purpose of the present invention is to reduce the burden on control center operators and each electric station operator when recovering from an accident, and even when the power system becomes larger, all system breakers can be
The purpose of the present invention is to provide a power system restoration method that allows restoration operations to be performed simply by installing RECs in circuit breakers in the main system without installing RECs.
本発明は発変電所の電力設備を遠方監視制御す
るための遠方監視制御装置と、これに結合する電
子計算機と発変電所に系統復旧用として設置され
た再閉路装置を用い、電子計算機と再閉路装置を
遠方監視制御装置を介して連結し、再閉路装置単
独により可能な事故復旧は再閉路装置に行なわ
せ、再閉路装置単独では不可能な系統の復旧操作
は、電子計算機が遠方監視制御装置を介して行な
うように分担させ、電力系統事故復旧をより確実
にできるようにしたことを特徴とする電力系統復
旧方式に関するものである。
The present invention uses a remote monitoring and control device for remotely monitoring and controlling power equipment in power generation and substations, a computer coupled to this device, and a reclosing device installed at the power generation and substation for grid restoration. The circuit-closing device is connected via a remote monitoring and control device, and the re-closing device performs accident recovery that is possible with the re-closing device alone, and the computer remotely monitors and controls system recovery operations that cannot be performed with the re-closing device alone. The present invention relates to a power system restoration method characterized in that the power system fault restoration can be more reliably performed by sharing the work through a device.
以下図面を参照して本発明の一実施例を説明す
る。第２図は、本発明を実施した場合の電力系統
図である。第３図は、本発明を実施するための機
器構成を示す図である。第３図において、３５は
制御所に設置した電子計算機であり、３５―ａは
メモリ、３５―ｂは演算制御部、３５―ｃはイン
ターフエースである。３はCRTデイスプレイ装
置、４はラインプリンターあるいはタイプライタ
ー等の印字出力装置、５１〜５ｎは制御所側伝送
装置、６１〜６ｎは発変電所側伝送装置、７１〜
７ｎ，８１〜８ｎは発変電所側に設けた電圧検出
器および再閉路装置、９１〜９ｎは発変電所内の
被測定対象あるいはしや断器である。
An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a power system diagram when the present invention is implemented. FIG. 3 is a diagram showing the equipment configuration for implementing the present invention. In FIG. 3, 35 is an electronic computer installed in the control center, 35-a is a memory, 35-b is an arithmetic control unit, and 35-c is an interface. 3 is a CRT display device, 4 is a print output device such as a line printer or typewriter, 51 to 5n is a control center side transmission device, 61 to 6n is a power generation/substation side transmission device, 71 to
Reference numerals 7n and 81 to 8n are voltage detectors and reclosing devices provided in the power generation and substation, and reference numerals 91 to 9n are objects to be measured or disconnectors in the power generation and substation.
第２図の線路２４に事故Ｆが発生した場合、図
示しない保護リレーにより遮断器２３―ａ，２４
―ａ，２５―ａがトリツプされる。 If an accident F occurs on the track 24 in Fig. 2, a protective relay (not shown)
-a, 25-a is tripped.
REC２３―ｂは再閉路条件成立後の所定時間
後遮断器２３―ａの再閉路を行い、かつ伝送路３
６を介して保護リレーから得た事故情報をCPU
３５に転送する。 REC23-b recloses the circuit breaker 23-a after a predetermined period of time after the reclosing condition is established, and closes the transmission line 3.
The accident information obtained from the protection relay via 6 is sent to the CPU.
Transfer to 35.
CPU３５は、その事故情報により下記処理が
実行される。以下第４図に従つて説明する。 The CPU 35 executes the following process based on the accident information. This will be explained below with reference to FIG.
の事故検出機能では、事故情報により、どの
系統が復旧操作の対象となるかを判別する。 The accident detection function uses accident information to determine which systems are subject to restoration operations.
の復旧操作手順作成機能は、ステツプでの
復旧操作対象系統の情報を受取り、その情報に従
がいCPU３５で操作すべき機器、操作順序及び、
操作開始条件を作り、それをステツプとに受
渡す。 The restoration operation procedure creation function receives information on the system to be restored in each step, and according to that information, determines the equipment to be operated by the CPU 35, the operation order, and
Create operation start conditions and pass them to the steps.
ステツプの復旧条件監視機能は、から受渡
された復旧条件により、REC２３―ｂからの遮
断器２３―ａの再閉路成行の情報を待つ。再閉路
が成功した場合、ステツプでそれを検出しステ
ツプを起動する。 The recovery condition monitoring function of the step waits for information on re-closing of the circuit breaker 23-a from the REC 23-b based on the recovery condition passed from the REC 23-b. If the reclosing is successful, the step detects it and activates the step.
ステツプの復旧操作処理機能は、から受渡
された操作手順に従がい遮断器２６―ａ，２８―
ａの状態を調べ、２８の発電機が発電運転中の状
態にある場合は、２８―ａの遮断登録を行なう。
同じく２９―ａの遮断器の状態を調べ２９の発電
機が運転中の場合には、２９―ａの遮断登録を行
なう。 The recovery operation processing function of the step follows the operation procedure passed from the circuit breakers 26-a, 28-.
Check the status of 28-a, and if the generator 28 is in the generating operation, register 28-a for interruption.
Similarly, the state of the circuit breaker 29-a is checked, and if the generator 29 is in operation, the circuit breaker 29-a is registered for interruption.
上記の処理で遮断登録がされた場合、ステツプ
は遮断操作対象の機器番号をステツプのTC
操作機能に受渡す。ステツプはTCを介し、該
当の遮断器をトリツプさせる。 If the shutdown is registered in the above process, the step will enter the device number for the shutdown operation into the step's TC.
Pass to operation function. The step trips the corresponding circuit breaker via the TC.
ステツプは、線路２６あるいは２７の電圧な
しの状態を検出し、再度ステツプを起動する。
ステツプは電圧なしの条件により次の操作手順
の遮断器２４―ａあるいは２５―ａの投入操作を
行なう。 The step detects a no voltage condition on line 26 or 27 and reactivates the step.
In this step, the circuit breaker 24-a or 25-a is closed in the next operation procedure depending on the no-voltage condition.
線路２６，２７が、復旧されたことにより遮断
器２８―ａあるいは２９―ａが自動投入（同期検
定装置動作による。）される。 When the lines 26 and 27 are restored, the circuit breaker 28-a or 29-a is automatically closed (by the operation of the synchronization verification device).
ステツプは２８―ａあるいは２９―ａのトリ
ツプ操作から上記の系統並列までの時間監視をス
テツプの時間管理機能を使用し行なう。一定時
間内に系統並列しない場合には、その旨アラーム
する。 The step uses the time management function of the step to monitor the time from the trip operation of 28-a or 29-a to the above-mentioned system parallelization. If the system is not parallelized within a certain period of time, an alarm will be issued to that effect.
以上のように復旧操作が行なわれる。 The recovery operation is performed as described above.
また上記のようにCPUがTCを介して、機器操
作を行なう場合、第５図のような復旧操作を行な
う全系統と、操作対象機器を全て表示したCRT
画面を用意し、これから操作を行なう機器のシン
ボルをフリツカーあるいは表示の色替えをし、運
転員にしらせ、運転員が確認の指示を行なつてか
ら操作を行なうようにすることも可能である。 In addition, when the CPU operates devices via the TC as described above, a CRT displaying all the systems to be restored and all the devices to be operated as shown in Figure 5 is displayed.
It is also possible to prepare a screen, flicker the symbol of the equipment to be operated or change the color of the display, have the operator do the same, and have the operator give confirmation instructions before operating the equipment.
本発明を実施する際に、CPU３５はマイクロ
コンピユータを用いた単機能装置あるいはミニコ
ンピユータを使用した集中制御システムの一部機
能であつてもよい。 In carrying out the present invention, the CPU 35 may be a single-function device using a microcomputer or a part of a central control system using a minicomputer.
〔発明の効果〕
以上のように再閉路装置による主要遮断器の再
閉路と、電子計算機による復旧操作を組合せるこ
とより、操作が適切に行なわれ、復旧操作が迅速
に実行され、電力系統の安定した運用が可能とな
る。[Effects of the Invention] As described above, by combining the re-closing of the main circuit breaker by the re-closing device and the restoration operation by the computer, the operation can be performed appropriately, the restoration operation can be executed quickly, and the power system can be improved. Stable operation becomes possible.
第１図は従来方式による電力系統構成と機器配
置図、第２図は本発明を電力系統に実施した場合
の機器配置図、第３図は本発明を実施するための
機器構成図、第４図は本発明を実施するためのフ
ローチヤート、第５図は本発明による機器操作確
認を行なう場合の使用CRT画面の一例を示す図
である。
３５…電子計算機、３５―ａ…メモリー、３５
―ｂ…演算制御部、３５―ｃ…インターフエー
ス、３…CRTデイスプレイ装置、４…ラインプ
リンターあるいはタイプライター等の印字出力装
置、５ｎ…制御所側伝送装置、６ｎ…発変電所側
伝送装置、７ｎ…電圧検出器、８ｎ…再閉路装
置。
Figure 1 is a power system configuration and equipment layout diagram according to the conventional method, Figure 2 is an equipment layout diagram when the present invention is implemented in the power system, Figure 3 is an equipment configuration diagram for implementing the present invention, and Figure 4 is a diagram of the equipment layout for implementing the present invention. The figure is a flowchart for implementing the present invention, and FIG. 5 is a diagram showing an example of a CRT screen used when confirming device operation according to the present invention. 35...electronic computer, 35-a...memory, 35
-b...Arithmetic control unit, 35-c...Interface, 3...CRT display device, 4...Print output device such as a line printer or typewriter, 5n...Control center side transmission device, 6n...Power substation side transmission device, 7n...Voltage detector, 8n...Reclosing device.
Claims (1)
列遮断器および再閉路装置を持たない母線側遮断
器を直列に介して母線により並列接続し、この母
線を再閉路装置を有する連けい遮断器を介し他の
系統に接続するように発変電所主回路を構成し、
この発変電所内の各遮断器、この各遮断器を遮断
する保護リレーおよび前記再閉路装置から出力さ
れる各種情報を遠方監視制御装置を介して電子計
算機に入力し、この電子計算機の演算出力を遠方
監視制御装置を介して遮断器に与えて制御するよ
うにした電力系統復旧方式において、 前記母線事故時保護リレーの動作により母線側
遮断器および再閉路装置を有する連けい遮断器を
遮断させ、 これら遮断器を遮断した保護リレーから得られ
る事故情報に基づいて、いずれの発電機系統を復
旧操作対象とするかを判別し、 この判別情報に基づいて操作すべき遮断器の操
作手順を作成し、 前記連けい遮断器の再閉路が成功した場合、前
記遮断器操作手順に従い、母線側遮断器から見て
発電機側に設置されている並列遮断器を遮断さ
せ、 この並列遮断器の遮断後、並列遮断器および母
線側遮断器間の電路に電圧が無いことを条件に母
線側遮断器を無電圧投入させ、 この母線側遮断器の投入後同期検定装置により
並列遮断器を投入させるようにした電力系統復旧
方式。[Scope of Claims] 1. A plurality of generators are connected in parallel by a bus bar through parallel circuit breakers each equipped with a synchronization verification device and a bus-side circuit breaker without a re-closing device in series, and the bus bar is connected in parallel to the bus bar with a re-closing device. Configure the power generation/substation main circuit to connect to other systems via a linked circuit breaker with
Various information output from each circuit breaker in this power generation and substation, the protection relay that interrupts each circuit breaker, and the reclosing device is input to a computer via a remote monitoring control device, and the calculation output of this computer is In a power system restoration method in which power is applied to and controlled by a circuit breaker via a remote monitoring and control device, the busbar side circuit breaker and the linked circuit breaker having a reclosing device are shut off by the operation of the busbar accident protection relay, and these Based on the accident information obtained from the protection relay that shut off the circuit breaker, determine which generator system should be targeted for recovery operations, create operating procedures for the circuit breaker that should be operated based on this determination information, If the re-closing of the linked circuit breaker is successful, the parallel circuit breaker installed on the generator side as seen from the bus-side circuit breaker is disconnected according to the circuit breaker operation procedure, and after the parallel circuit breaker is disconnected, the parallel circuit breaker is closed. Electric power that closes the bus-side circuit breaker without voltage on the condition that there is no voltage in the electrical circuit between the circuit breaker and the bus-side circuit breaker, and then closes the parallel circuit breaker using a synchronization verification device after closing the bus-side circuit breaker. Grid restoration method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58062947A JPS59191442A (en) | 1983-04-12 | 1983-04-12 | Power system recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58062947A JPS59191442A (en) | 1983-04-12 | 1983-04-12 | Power system recovery system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59191442A JPS59191442A (en) | 1984-10-30 |
| JPS6329499B2 true JPS6329499B2 (en) | 1988-06-14 |
Family
ID=13215006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58062947A Granted JPS59191442A (en) | 1983-04-12 | 1983-04-12 | Power system recovery system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59191442A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4716556B2 (en) * | 2000-11-20 | 2011-07-06 | 本田技研工業株式会社 | Mounting structure of hydraulic shock absorber in vehicle suspension |
| JP5291926B2 (en) | 2007-12-18 | 2013-09-18 | 株式会社ブリヂストン | Strut mount |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5649637A (en) * | 1979-09-29 | 1981-05-06 | Tokyo Shibaura Electric Co | Power distribution line automating system |
-
1983
- 1983-04-12 JP JP58062947A patent/JPS59191442A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5649637A (en) * | 1979-09-29 | 1981-05-06 | Tokyo Shibaura Electric Co | Power distribution line automating system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59191442A (en) | 1984-10-30 |
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