JPS63316610A - Differential relay device - Google Patents
Differential relay deviceInfo
- Publication number
- JPS63316610A JPS63316610A JP62152503A JP15250387A JPS63316610A JP S63316610 A JPS63316610 A JP S63316610A JP 62152503 A JP62152503 A JP 62152503A JP 15250387 A JP15250387 A JP 15250387A JP S63316610 A JPS63316610 A JP S63316610A
- Authority
- JP
- Japan
- Prior art keywords
- current
- relay device
- differential relay
- transmission line
- current transformer
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 23
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 230000001629 suppression Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 101100326920 Caenorhabditis elegans ctl-1 gene Proteins 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
Ａ、産業上の利用分野
本発明は、需雰点の母線保護に用いる差動リレー装置に
関するものである。DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a differential relay device used for protecting busbars at demand points.
Ｂ６発明のｅ要
本発明は、需要家の母線保護に用いる差動リレー装置に
おいて、
送電線側の電流は送電線毎の入力チャンネルとし、負荷
側の電流は変流器２次で合成して一つの入力チャンネル
とすることにより、
負荷設備の増設などに対し、リレー装量の変更を必要と
することなく対処し得るようＫしたものである。B6 Invention e Summary The present invention is a differential relay device used for customer bus protection, in which the current on the transmission line side is input to each transmission line channel, and the current on the load side is combined in a secondary current transformer. By using one input channel, it is possible to cope with the addition of load equipment without having to change the amount of relays installed.
Ｃ１従来の技術
特高需要家などにおける受電系統は、例えば第３図に示
すように送電ＩＩＪ Ｌ Ｉ ＃ Ｌ ｔに傾断器ＣＢ
−１゜ＣＢ−２を介して母線Ｂを接続し、この母線Ｂ
Ｋ ａ断器ＣＢ−３，ＣＢ−４，ＣＢ−５，・・・・・
・を介して各フィーダを接続して負荷に電力を供給する
構成としている。C1 Conventional technology A power receiving system for a special high demand customer, for example, as shown in Figure 3, has a tilter CB in the power transmission
-1゜Connect bus B through CB-2, and connect this bus B
Ka disconnector CB-3, CB-4, CB-5,...
The structure is such that each feeder is connected through the ・ to supply power to the load.
この系統での母線Ｂの保ＦＢＩは、一般に送電線ｌ１ｌ
ｓＬ、に設けた変流器ＣＴ、 、 ＣＴ、と各フィーダ
に設けた変流器ＣＴ、〜ＣＴｌ１より電流を得、差動リ
レー装置ＲＹを組むことによって行っている。In this system, the maintenance FBI of bus B is generally
This is done by obtaining current from current transformers CT, , CT, provided in sL, and current transformers CT, ~CTl1 provided in each feeder, and assembling a differential relay device RY.
ｎ発明が解決しようとする問題点
しかし、このような構成では、負荷の増設があった場合
、送電線Ｌ １ ｍ ” ｔに設けた変流器Ｃ’Ｉ’１
゜ＣＴ、の構成に変化はないが、負荷側の変流器数は増
加し、この増加に伴って母線保護差動リレー装置ＲＹの
入力チャンネルが増加するため、差動リレー装置ＲＹの
変更が必要となる。nProblems to be Solved by the Invention However, in such a configuration, when a load is added, the current transformer C'I'1 installed on the power transmission line L1m''t
゜The configuration of the CT remains unchanged, but the number of current transformers on the load side increases, and with this increase, the input channels of the bus protection differential relay device RY increase, so changes to the differential relay device RY are required. It becomes necessary.
また、上述の受電系統では、正相、零相電源は全て送電
ｉｔ＋ｔｏＬｔ側にある。なお、需要家内に自家発電設
備を備えることもあるが、一般には送を線り、、Ｌ、側
の電源よりはるかに小さく、母線Ｂの短絡事故などにお
ける電流は送電線側から供給されると考えてよい。Further, in the power receiving system described above, all the positive phase and zero phase power supplies are on the power transmission it+toLt side. Although consumers may have their own power generation equipment, it is generally much smaller than the power supply on the transmission line, L, and side, and the current in the event of a short-circuit accident on bus B is supplied from the transmission line. You can think about it.
このため、変流器ＣＴ、〜ＣＴｎは、その変流比が一般
に送を線Ｌ 、 、Ｌ 、側の変流器ＣＴ１． ＣＴ、
より小さく、変流器ＣＴ、〜ＣＴｎ より負荷側に事故
が発生した時には変流器ＣＴ、、ＣＴ、に比較して飽和
し易いといった問題点がある。For this reason, the current transformers CT, -CTn generally have a current transformation ratio of the current transformers CT1 . CT,
They are smaller and have the problem of being more easily saturated than current transformers CT, , CT, when an accident occurs on the load side of current transformers CT, , CTn.
Ｅ０問題点を解決するための手段
本発明は、１回線以上の送ｔＩＮに接続された需１点の
母線の保護を、送電線側の変流器と負荷側の変流器より
得られる電流を用いた差動リレーの演算によって行う差
動リレー装置において、負荷側の電流は負荷側変流器の
２次で合成して一つの入力チャンネルで入力するように
したことを特徴とするものである。Means for Solving the E0 Problem The present invention protects a single-point bus connected to one or more transmission lines using current obtained from a current transformer on the transmission line side and a current transformer on the load side. This is a differential relay device that performs differential relay calculations using a differential relay, and is characterized in that the current on the load side is combined in the secondary of the current transformer on the load side and input through one input channel. be.
Ｒ作用
送電線に設けられた変流器からは個々の入力チャンネル
を通して電流が差動リレーに入力される。Current transformers on the R-acting transmission line input current to the differential relay through individual input channels.
負荷側の変流器からは変流器２次で合成された電流が一
つの入力チャンネルを通して差動リレーに入力される。From the current transformer on the load side, the current combined at the secondary current transformer is input to the differential relay through one input channel.
この結果、負荷の増設などがあった場合にも入力チャン
ネル数に変化はなく、リレー装置の変更は不要となる。As a result, even if a load is added, the number of input channels does not change, and there is no need to change the relay device.
なお、各電流を用いて差動リレーの演算か行われるが、
その場合、負荷側の合成された電流の立上り時の最大値
が演算、記憶され、抑制量として使用される。Note that differential relay calculations are performed using each current, but
In that case, the maximum value at the rise of the combined current on the load side is calculated and stored, and used as the amount of suppression.
Ｇ、実施例
以下、本発明を図示の実施例に基づいて詳細に説明する
。G. EXAMPLES The present invention will be explained in detail below based on illustrated examples.
第１図及び第２図は本発明の一実施例を示すものでｓ”
Ｉ及びＬ２は送電線％Ｂはこの送電線”ＩｓＬ、に遮断
器ＣＢ−１，ＣＢ−２を介して接続されたＦ１１＠Ｓ
ＣＢ−３〜ＣＢ−ｎはこの母線Ｂに接続さｔｔ、り各フ
ィーダに挿設された戸断器、 ＣＴ１及びＣＴ、は前記
送電線ＴＪ’ ｔ ａＬｔに設けられた変流器、 Ｃ’
Ｉ’、〜ＣＴｎは前記各フィーダに設けられた変流器で
あり。Figures 1 and 2 show one embodiment of the present invention.
I and L2 are transmission lines %B is F11@S connected to this transmission line "IsL" via circuit breakers CB-1 and CB-2.
CB-3 to CB-n are connected to this bus B, and door disconnectors inserted in each feeder; CT1 and CT are current transformers installed in the transmission line TJ' t aLt; C'
I', ~CTn are current transformers provided in each of the feeders.
各フィーダから各負荷に電力を供給する構成となってい
る。The structure is such that power is supplied from each feeder to each load.
ｌＯは前記変流器ＣＴ、〜ＣＴｎよりの電流を入力とす
るリレー装置で、変流器ＣＴ、からは電流ｉ１＋変流器
ＣＴ、からは電流〒２．変流器ＣＴ、〜ＣＴｎからはそ
の２次合成電流ｆ、をそれぞれ得るようにしている。こ
のリレー装置】０は電流↑１．↑１＋Ｌを順次取入れる
マルチプレクサ−回路１１ 、 Ａ／Ｄ変換回路１２．
差動リレーのアルゴリズムの演算などを行うＣＰＵＩ
３などを備えている。1O is a relay device which inputs the current from the current transformers CT to CTn, and the current from the current transformer CT is the current i1 + the current from the current transformer CT is 〒2. The secondary composite current f is obtained from the current transformers CT, -CTn, respectively. This relay device】0 is the current ↑1. ↑Multiplexer circuit 11 that sequentially takes in 1+L, A/D conversion circuit 12.
CPU that performs differential relay algorithm calculations, etc.
3 etc.
前記ＣＰＵ１３には、第２図に示すように電流り、Ｌｓ
Ｌのベクトル和Σｉの絶対値１Σ１１を演算する手段２
】、各電流〒、〜１．の絶対値＋ｉ、＋、＋ｆ、＋。As shown in FIG. 2, the CPU 13 receives a current, Ls.
Means 2 for calculating the absolute value 1Σ11 of the vector sum Σi of L
], each current 〒, ~1. The absolute value of +i, +, +f, +.
１↑１１を演算する手段２２〜２４．電流↑、の立上り
時（短絡電流の直流分などによって飽和する前）の電流
最大値’Ｉｓ１ＭＡＸを求めて記憶する手段２５゜＋′
Ｘ、４ 、 ＋ｉ、＋及びＩＩｓｌＭＡＸ を合成して
Σ＋ｉ＋ を求める手段２６，１Σ↑ｌ−にΣ１↑１〉
Ｋｏを演算し、この式が成立した時に母Ｉ＃ＡＢに事故
があったと判断して遮断器の引外し信号（トリップ信号
）を出す手段２７を持たせている。但し、Ｋは抑制率、
に、は判定のための定数である。Means for calculating 1↑11 22-24. Means for determining and storing the maximum current value 'Is1MAX' at the rise of the current ↑ (before being saturated by the DC component of the short circuit current, etc.) 25°+'
Means for synthesizing X, 4, +i, + and IIslMAX to obtain Σ+i+ 26, 1Σ↑l− to Σ1↑1>
The device is provided with a means 27 for calculating Ko, determining that an accident has occurred in the mother I#AB when this formula is established, and outputting a trip signal for the circuit breaker. However, K is the suppression rate,
, is a constant for judgment.
このような構成の差動リレー装置は、送電線Ｌ１の電流
が変流器ＣＴ１の２次電流〒Ｉとして、送電線り、の電
流が変流器ＣＴ、の２次電流りとして。In the differential relay device having such a configuration, the current of the power transmission line L1 is the secondary current of the current transformer CT1, and the current of the power transmission line is the secondary current of the current transformer CT.
また負荷側の電流が変流器ＣＴ、〜ＣＴｎの２次合成電
流ｉ、としてそれぞれ入力され、Ａ／ｆｉ変換後ＣＰＵ
Ｉ ３に取込まれて差動リレーの演算が行われる。この
場合、入力チャンネルは負荷設備の増減に拘らずに一定
（３チヤンネル）となる。In addition, the current on the load side is input as the secondary composite current i of the current transformers CT and ~CTn, respectively, and after A/fi conversion, the CPU
It is taken into I3 and calculation of the differential relay is performed. In this case, the input channels are constant (3 channels) regardless of the increase or decrease in load equipment.
演算は、まず各電流１１ｓ１１ｓＬのベクトル和の絶対
値１Σ１１と、各電流；、、Ｘ重、１．の絶対値ＩＩ、
Ｉ 。The calculation begins with the absolute value 1Σ11 of the vector sum of each current 11s11sL, and each current; absolute value II,
I.
＋ｉ、＋、＋ｉ、＋ とについて行われ、次いで負荷
側変流器ＣＴ、〜ＣＴｎからの入力電ｇｉ、に対し、短
絡電流の直流分などによる飽和が生じるまでの値で最大
のもの１〒ｍ１ＭＡＸが求められて記憶される。この後
、 ＋ｉ□＋、＋ｉ、＋、＋↑、ＩＭＡｘの和Σ１〒
１が演算され、この値と前述の値＋ｒｉ＋を用いて！Σ
１ｔ−ｘΣ１〒１〉Ｋｏの演算が行われ、その成立時に
トリップ信号が出される。+i, +, +i, +, and then the input voltage gi from the load-side current transformers CT, ~CTn is determined to be the maximum value 1 until saturation occurs due to the DC component of the short-circuit current, etc. m1MAX is determined and stored. After this, +i□+, +i, +, +↑, the sum of IMAx Σ1〒
1 is calculated, and using this value and the aforementioned value +ri+! Σ
The calculation 1t-xΣ1〒1>Ko is performed, and a trip signal is issued when the calculation is established.
この演算においては、負荷側変流器の合成電流が２次側
に出なくなっても、初めの立上り（飽和する前）の値が
配憶されて抑制量として使用されており、適確な保護動
作となる。In this calculation, even if the combined current of the load-side current transformer no longer flows to the secondary side, the value of the initial rise (before saturation) is stored and used as the suppression amount, allowing for appropriate protection. It becomes an action.
Ｈ０発明の効果
以上のように本発明によれば、需要家の８１ｍに接続さ
れた送電線側の電流は送電線毎の入力チャンネルとし、
負荷側の電流は変流器の２次で合成して一つの入力チャ
ンネルとしたので、負荷の増設などに対しリレー装置の
変更が不要となる。また、負荷側の変流器からの入カニ
、に対し、飽和以前の最大値を記憶しておいて抑制量と
することで短絡電流の直流分などによる飽和に対処する
ようにしたので、負荷側変流器の飽和による影響を軽減
でき、動作信頼性の向上が図れる。H0 Effects of the Invention As described above, according to the present invention, the current on the power transmission line side connected to 81m of the consumer is set to an input channel for each power transmission line,
The current on the load side is combined at the secondary of the current transformer into one input channel, so there is no need to change the relay device when adding more loads. In addition, with respect to input from the current transformer on the load side, the maximum value before saturation is memorized and used as the suppression amount to cope with saturation caused by the DC component of short circuit current, etc. The influence of saturation of the side current transformer can be reduced, and operational reliability can be improved.
第１図は本発明に係る差動リレー装置の一実施例を示す
構成説明図、第２図は同実施例における演算部のブロッ
ク図、第３図は従来の差動リレー装置の構成説明図であ
る。
Ｌ、及びり、・・・送電線、Ｂ・・・母線、 ＣＴ、〜
ＣＴｎ・・・変流器、１０・・・リレー装置、１１・−
・マルチプレクサ−１１２・・・Ａ／ｂ変換回路、１３
・・・ＣＰＵ。
２１・・・電流ベクトル和演算手段、２２〜２４・・・
各電流の絶対値演算手段、２５・・・負荷側変流器の２
次合成電流の最大値を求める手段、２６・・・各電流の
絶対値の和を演算する手段、２７・・・１Σｉ＋−ＫＥ
＋ｉ＋＞Ｋ、の演算を行う手段。
Ｂｒ’FIG. 1 is a configuration explanatory diagram showing one embodiment of a differential relay device according to the present invention, FIG. 2 is a block diagram of a calculation section in the same embodiment, and FIG. 3 is a configuration explanatory diagram of a conventional differential relay device. It is. L, reach, ... power transmission line, B... busbar, CT, ...
CTn...Current transformer, 10...Relay device, 11.-
・Multiplexer 112...A/b conversion circuit, 13
...CPU. 21...Current vector sum calculation means, 22-24...
Absolute value calculation means for each current, 25... 2 of the load side current transformer
Means for calculating the maximum value of the next composite current, 26... Means for calculating the sum of the absolute values of each current, 27...1Σi+-KE
A means for calculating +i+>K. Br'
Claims (2)
保護を、送電線側の変流器と負荷側の変流器より得られ
る電流を用いた差動リレーの演算によつて行う差動リレ
ー装置において、負荷側の電流は負荷側変流器の２次で
合成して一つの入力チャンネルで入力するようにしたこ
とを特徴とする差動リレー装置。(1) Protection of busbars at demand points connected to one or more power transmission lines by differential relay calculation using current obtained from a current transformer on the transmission line side and a current transformer on the load side. A differential relay device characterized in that the current on the load side is combined in the secondary of a current transformer on the load side and input through one input channel.
算し、記憶する手段を演算部に備えた特許請求の範囲第
１項記載の差動リレー装置。(2) The differential relay device according to claim 1, wherein the calculation unit includes means for calculating and storing the maximum value at the rise of the combined current on the load side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62152503A JP2728873B2 (en) | 1987-06-19 | 1987-06-19 | Differential relay device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62152503A JP2728873B2 (en) | 1987-06-19 | 1987-06-19 | Differential relay device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63316610A true JPS63316610A (en) | 1988-12-23 |
| JP2728873B2 JP2728873B2 (en) | 1998-03-18 |
Family
ID=15541886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62152503A Expired - Fee Related JP2728873B2 (en) | 1987-06-19 | 1987-06-19 | Differential relay device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2728873B2 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52143461A (en) * | 1976-05-24 | 1977-11-30 | Mitsubishi Electric Corp | Protective relay device |
| JPS57186923A (en) * | 1981-05-12 | 1982-11-17 | Mitsubishi Electric Corp | Digital type simple bus protective relay unit |
| JPS6074931A (en) * | 1983-09-29 | 1985-04-27 | 株式会社東芝 | Bus protecting and relaying device |
| JPS60245423A (en) * | 1984-05-18 | 1985-12-05 | 株式会社日立製作所 | Ratio differential relay |
-
1987
- 1987-06-19 JP JP62152503A patent/JP2728873B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52143461A (en) * | 1976-05-24 | 1977-11-30 | Mitsubishi Electric Corp | Protective relay device |
| JPS57186923A (en) * | 1981-05-12 | 1982-11-17 | Mitsubishi Electric Corp | Digital type simple bus protective relay unit |
| JPS6074931A (en) * | 1983-09-29 | 1985-04-27 | 株式会社東芝 | Bus protecting and relaying device |
| JPS60245423A (en) * | 1984-05-18 | 1985-12-05 | 株式会社日立製作所 | Ratio differential relay |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2728873B2 (en) | 1998-03-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |