JPH06343222A - Dynamic-range expanding method for protecting relay - Google Patents
Dynamic-range expanding method for protecting relayInfo
- Publication number
- JPH06343222A JPH06343222A JP5127662A JP12766293A JPH06343222A JP H06343222 A JPH06343222 A JP H06343222A JP 5127662 A JP5127662 A JP 5127662A JP 12766293 A JP12766293 A JP 12766293A JP H06343222 A JPH06343222 A JP H06343222A
- Authority
- JP
- Japan
- Prior art keywords
- detection circuit
- output
- electric quantity
- quantity detection
- protection relay
- 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.)
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Links
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- Emergency Protection Circuit Devices (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば電力系統の電
圧，電流等の電気量を取り込んで計測し、制御あるいは
事故の発生を検知する保護リレー装置に関するものであ
り、詳しくは、該保護リレー装置における入力ダイナミ
ックレンジの拡大方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective relay device for taking in and measuring electric quantities such as voltage and current of a power system to detect control or accident occurrence. The present invention relates to a method for expanding an input dynamic range in a device.
【０００２】[0002]
【従来の技術】従来の保護リレー装置は、図３の如く構
成されていた。図３において、Ａ，Ｂはそれぞれ電気量
検出回路、ＲｙＡ，ＲｙＢはそれぞれ保護リレー要素で
ある。電気量検出回路Ａは高レベルの電気量（大電流）
を精度良く検出するように構成され、電気量検出回路Ｂ
は低レベルの電気量（小電流）を精度良く検出するよう
に構成されている。2. Description of the Related Art A conventional protection relay device is constructed as shown in FIG. In FIG. 3, A and B are electric quantity detection circuits, and RyA and RyB are protection relay elements. Electricity detection circuit A has a high level of electricity (large current)
Of the electric quantity detection circuit B
Is configured to accurately detect a low level electricity quantity (small current).
【０００３】電力系統の電流Ｉは、電気量検出回路Ａ，
Ｂに入力され、電気量検出回路Ａの出力ＩA はリレー要
素ＲｙＡに取り込まれ、電気量検出回路Ｂの出力ＩB は
リレー要素ＲｙＢに取り込まれる。電力系統における電
流等の電気量を取り込む場合に、高レベルの電気量に対
しては電気量検出回路Ａおよび保護リレー要素ＲｙＡを
用い、低レベルの電気量に対しては電気量検出回路Ｂお
よび保護リレー要素ＲｙＢを用いることにより、精度良
く検出することができる。The current I of the power system is the electric quantity detection circuit A,
Is input to the B, the output I A of the electric quantity detection circuit A incorporated in the relay element RyA, the output I B of the electric quantity detection circuit B is taken into the relay element RyB. When an electric quantity such as a current in the power system is taken in, the electric quantity detection circuit A and the protection relay element RyA are used for a high level electric quantity, and the electric quantity detection circuit B and a protection relay element RyA are used for a low level electric quantity. By using the protection relay element RyB, it is possible to detect with high accuracy.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、例え
ば、前記保護リレー要素Ａに対し、低レベルから高レベ
ルまでの広い範囲に渡って高精度の電流検出が要求され
た場合、高レベル用に構成された電気量検出回路Ａでは
その特性により低レベルの電流の検出精度が低下すると
いう問題がある。However, for example, when the protection relay element A is required to detect current with high precision over a wide range from low level to high level, it is configured for high level. In addition, the electric quantity detection circuit A has a problem that the detection accuracy of a low level current is deteriorated due to its characteristics.
【０００５】そこで本発明は、上記従来技術の問題点に
鑑みてなされたものであり、低レベルの電流から高レベ
ルの電流まで精度良く検出させるため、高レベル用に構
成された電気量検出回路と低レベル用に構成された電気
量検出回路とを用いて保護リレーのダイナミックレンジ
を拡大する保護リレーのダイナミックレンジ拡大方法の
提供を目的とする。Therefore, the present invention has been made in view of the above problems of the prior art, and in order to accurately detect a low level current to a high level current, an electric quantity detection circuit configured for a high level is provided. An object of the present invention is to provide a method for expanding the dynamic range of a protection relay, which expands the dynamic range of the protection relay by using the electric quantity detection circuit configured for low level.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に、本発明においては、高レベル電気量検出回路出力と
低レベル電気量検出回路出力とを切り換えるための切り
換えスイッチを保護リレー要素の入力側に設け、前記２
つの電気量検出回路出力のうちどちらか一方の大きさに
基づいて前記スイッチの切り換えを行う。In order to achieve the above object, in the present invention, a changeover switch for switching between a high level electricity quantity detection circuit output and a low level electricity quantity detection circuit output is provided as an input of a protection relay element. Provided on the side, the above 2
The switch is switched based on the magnitude of either one of the outputs of the one electricity quantity detection circuit.
【０００７】[0007]
【作用】前記２つの電気量検出回路出力のうちどちらか
一方の大きさに基づいて前記スイッチの切り換えを行う
ことにより、低レベル電気量検出回路出力と高レベル電
気量検出回路出力とが切り換えられて前記スイッチを備
えた保護リレー要素に入力される。By switching the switch based on the size of either one of the outputs of the two electric quantity detection circuits, the low level electric quantity detection circuit output and the high level electric quantity detection circuit output are switched. Input to a protection relay element equipped with the switch.
【０００８】例えば、高レベルの電気量を対象とした保
護リレー要素側に前記切り換えスイッチを設け、このス
イッチを低レベル電気量検出回路出力の大きさに応じて
切り換える場合、低レベル電気量検出回路出力があらか
じめ定めた値より小さい場合には前記保護リレー要素に
対して低レベル電気量検出回路出力が入力され、低レベ
ル電気量検出回路出力があらかじめ定めた値を上回った
場合に該スイッチの切り換えがなされ、前記保護リレー
要素に対して高レベル電気量検出回路出力が入力され
る。For example, when the changeover switch is provided on the side of the protection relay element for the high level electricity quantity, and this switch is changed over according to the output level of the low level electricity quantity detection circuit, the low level electricity quantity detection circuit When the output is smaller than a predetermined value, the low level electricity amount detection circuit output is input to the protection relay element, and when the low level electricity amount detection circuit output exceeds a predetermined value, the switch is switched. Then, the high level electricity quantity detection circuit output is inputted to the protection relay element.
【０００９】[0009]
【実施例】図１は、本発明による第１の実施例を説明す
るための回路構成図であり、図３に示した回路構成図に
スイッチＳＷとリレー要素Ｃが追加された構成となって
いる。この他の図３に示した回路構成図と同等の機能を
有するものには同じ符号を付して説明を省略する。1 is a circuit diagram for explaining a first embodiment of the present invention, in which a switch SW and a relay element C are added to the circuit diagram shown in FIG. There is. The other components having the same functions as those in the circuit configuration diagram shown in FIG. 3 are designated by the same reference numerals and the description thereof will be omitted.
【００１０】第１の実施例では、スイッチＳＷは保護リ
レー要素Ａの入力側に設けられていて、該保護リレー要
素Ａへの入力を、前記電気量検出回路Ａの出力ＩA から
前記電気量検出回路Ｂの出力ＩB へ、あるいは電気量検
出回路Ｂの出力ＩB から前記電気量検出回路Ａの出力Ｉ
A へ切り換える。また、リレー要素Ｃには電気量検出回
路Ｂの出力ＩB が入力されていて、このＩB の大きさに
応じてスイッチＳＷに対し切り換え指令を出力し、該切
り換え指令を受けたスイッチＳＷは上述の切り換え動作
を行う。In the first embodiment, the switch SW is provided on the input side of the protective relay element A, and the input to the protective relay element A is changed from the output I A of the electrical quantity detection circuit A to the electrical quantity. output I output I B to, or an electric quantity detection circuit and the electric quantity detecting circuit a from the output I B of B of the detection circuit B
Switch to A. Furthermore, the relay element C have been input output I B of the electric quantity detection circuit B, and outputs a switching instruction to switch SW in accordance with the magnitude of the I B, the switch SW which receives the switching instruction is The above switching operation is performed.
【００１１】次にスイッチＳＷにおける上述の切り換え
動作について説明する。スイッチＳＷの切り換えは、リ
レー要素Ｃに導かれた電気量検出回路Ｂの出力ＩB の大
きさに応じて、即ち前記ＩB をあらかじめ定めた値と比
較し、ＩB が該値を上回った時あるいは下回った時、ス
イッチＳＷに対し切り換え指令が出力され切り換え動作
が行われる。Next, the above-mentioned switching operation of the switch SW will be described. Switching of the switch SW, depending on the magnitude of the output I B of the electric quantity detection circuit B led to a relay element C, that is compared with the predetermined value the I B, is I B exceeds the said value When or below, the switching command is output to the switch SW and the switching operation is performed.
【００１２】そこでまず、電気量検出回路Ｂの検出範囲
の最大値である一定の値Ｋ1 と電気量検出回路Ｂに高レ
ベルの電気量が入力された場合に発生する誤差分を考慮
しＫ 1 より小さな値のＫ2 をあらかじめ定める。まずＩ
B がＫ2 より小さな値から増加していく場合について説
明する。ＩB ＜Ｋ2 の状態ではスイッチＳＷは電気量検
出回路Ｂ側に接続されていて、保護リレー要素ＲｙＡに
は電気量検出回路Ｂ出力のＩB が入力されている。ＩB
が増加してＫ2 を上回りさらにＩB ＞Ｋ1 となった場合
にスイッチＳＷを電気量検出回路Ａ側に切り換え、保護
リレー要素ＲｙＡにはＩA が入力される。Therefore, first, the detection range of the electric quantity detection circuit B
Constant value K which is the maximum value of1And the electric quantity detection circuit B
Considers the error generated when the bell electricity is input
K 1Smaller value of K2Is determined in advance. First I
BIs K2Explain the case of increasing from smaller value
Reveal IB<K2In the state of
It is connected to the output circuit B side and connected to the protection relay element RyA.
Is I of the electric quantity detection circuit B outputBHas been entered. IB
Increases and K2Over and further IB> K1If
Switch SW to the electric quantity detection circuit A side for protection
I for relay element RyAAIs entered.
【００１３】逆にＩB ＞Ｋ1 であって、かつ保護リレー
要素ＲｙＡにはＩA が入力されている状態からＩB が減
少する場合、ＩB が減少してＫ1 を下回り、さらにＩB
＜Ｋ 2 となった場合にスイッチＳＷが電気量検出回路Ｂ
側に切り換えられ、保護リレー要素ＲｙＡにはＩB が入
力される。既に述べているとおりＫ1 とＫ2 は電気量検
出回路Ｂに高レベルの電気量が入力された場合に発生す
る誤差分を考慮した上で設定されているため、誤差の影
響を受けてスイッチＳＷが切り換え動作を頻繁に繰り返
すことはなく、高レベル用の保護リレー要素ＲｙＡで低
レベル電気量の検出が可能となる。On the contrary, IB> K1And protection relay
I for element RyAAFrom the state where is inputBIs reduced
If less, IBDecreases and K1Below, then IB
<K 2Switch SW switches to the electric quantity detection circuit B
To the side, and the protection relay element RyA has IBIs in
I will be forced. As I said, K1And K2Is an electric quantity test
It occurs when a high level electricity quantity is input to the output circuit B.
The error shadow is
In response to the sound, the switch SW repeats the switching operation frequently.
Low protection relay element RyA for high level
It becomes possible to detect level electricity.
【００１４】図２は本発明による第２の実施例を示した
ものであり、図２の如く、スイッチＳＷが、保護リレー
要素Ｂの入力側に設けられている。該保護リレー要素Ｂ
への入力を、前記電気量検出回路Ａの出力ＩA から前記
電気量検出回路Ｂの出力ＩBへ、あるいは電気量検出回
路Ｂの出力ＩB から前記電気量検出回路Ａの出力ＩAへ
切り換える。FIG. 2 shows a second embodiment according to the present invention. As shown in FIG. 2, the switch SW is provided on the input side of the protection relay element B. The protection relay element B
The input to, the output I A of the electric quantity detecting circuit A to the output I B of the electric quantity detecting circuit B, or from the output I B of the electric quantity detection circuit B to the output I A of the electric quantity detecting circuit A Switch.
【００１５】また、リレー要素Ｃには電気量検出回路Ｂ
の出力ＩB が入力されていて、このＩB の大きさに応じ
てスイッチＳＷに対し切り換え指令を出力し、該切り換
え指令を受けたスイッチＳＷは電気量検出回路Ｂの出力
ＩB の大きさに基づいて切り換え動作を行う。即ち、Ｉ
B がＫ2 より小さな値から増加していく場合は、ＩB ＜
Ｋ2 の状態ではスイッチＳＷは電気量検出回路Ｂ側に接
続されていて、保護リレー要素ＲｙＢには電気量検出回
路Ｂ出力のＩB が入力されている。ＩB が増加してＫ2
を上回りさらにＩB ＞Ｋ1 となった場合にスイッチＳＷ
を電気量検出回路Ａ側に切り換え、保護リレー要素Ｒｙ
ＢにはＩA が入力される。Further, the relay element C has an electric quantity detection circuit B.
Output I B is being input, the size of the I outputs a switching instruction to switch SW in accordance with the magnitude of B, the output I B of the switch SW which receives the switching command electric quantity detecting circuit B of The switching operation is performed based on That is, I
If B increases from a value smaller than K 2 , then I B <
In the state of K 2 be connected switch SW to an electrical detection circuit B side, I B of the electric quantity detection circuit B output is input to the protective relay element RyB. I B increases and K 2
Switch SW in case of I B > K 1
The protection relay element Ry.
I A is input to B.
【００１６】逆にＩB ＞Ｋ1 であって、かつ保護リレー
要素ＲｙＢにはＩA が入力されている状態からＩB が減
少する場合、ＩB が減少してＫ1 を下回り、さらにＩB
＜Ｋ 2 となった場合にスイッチＳＷが電気量検出回路Ｂ
側に切り換えられ、保護リレー要素ＲｙＢにはＩB が入
力される。第２の実施例においてもＫ1 とＫ2 は電気量
検出回路Ｂに高レベルの電気量が入力された場合に発生
する誤差分を考慮した上で設定されているため、誤差の
影響を受けてスイッチＳＷが切り換え動作を頻繁に繰り
返すことはなく、低レベル用の保護リレー要素ＲｙＢで
低レベル電気量の検出が可能となる。On the contrary, IB> K1And protection relay
I for element RyBAFrom the state where is inputBIs reduced
If less, IBDecreases and K1Below, then IB
<K 2Switch SW switches to the electric quantity detection circuit B
To the protection relay element RyB.BIs in
I will be forced. Also in the second embodiment, K1And K2Is the amount of electricity
It occurs when a high level electricity quantity is input to the detection circuit B.
Since it is set after considering the error amount,
Under the influence, the switch SW repeats the switching operation frequently.
Never return, with a low level protection relay element RyB
It is possible to detect low level electricity.
【００１７】[0017]
【発明の効果】本発明によれば、保護リレー要素への入
力を切り換える手段を設けて、該保護リレー要素への入
力を電気量検出回路出力の大きさに応じて高レベル電気
量検出回路出力から低レベル電気量検出回路出力へ、あ
るいは低レベル電気量検出回路出力から高レベル電気量
検出回路出力へ切り換えることにより、１つの保護リレ
ー要素の検出ダイナミックレンジが拡大する。According to the present invention, means for switching the input to the protection relay element is provided, and the input to the protection relay element is output at the high level electricity quantity detection circuit according to the magnitude of the electricity quantity detection circuit output. To the low level electricity quantity detection circuit output or from the low level electricity quantity detection circuit output to the high level electricity quantity detection circuit output, the detection dynamic range of one protection relay element is expanded.
【図１】本発明による実施例を示す図FIG. 1 is a diagram showing an embodiment according to the present invention.
【図２】本発明による実施例を示す図FIG. 2 is a diagram showing an embodiment according to the present invention.
【図３】従来例を示す図FIG. 3 is a diagram showing a conventional example.
Ａ，Ｂ 電気量検出回路 ＲｙＡ，ＲｙＢ 保護リレー要素 ＳＷ スイッチ Ｃ リレー要素 A, B Electricity detection circuit RyA, RyB Protection relay element SW switch C Relay element
Claims (3)
検出回路と、前記２つの電気量検出回路出力を切り換え
て１つの保護リレー要素へ入力する切り換え手段とを備
え、 １つの電気量を前記２つの電気量検出回路によってそれ
ぞれ検出し、該２つの電気量検出回路出力のうちどちら
か一方の大きさに基づいて前記切り換え手段を動作させ
て、前記保護リレー要素の入力を切り換えることを特徴
とする保護リレーのダイナミックレンジ拡大方法。1. An electric quantity detection circuit having two different dynamic ranges, and switching means for switching the outputs of the two electric quantity detection circuits and inputting the electric quantity to one protection relay element. The protection is characterized in that each is detected by an electric quantity detection circuit, and the switching means is operated based on one of the outputs of the two electric quantity detection circuit to switch the input of the protection relay element. How to expand the dynamic range of a relay.
出回路と、該第１電気量検出回路の出力に応じて動作す
る第１保護リレー要素と、低レベルの電気量を検出する
第２電気量検出回路と、該第２電気量検出回路の出力に
応じて動作する第２保護リレー要素とを備えた保護リレ
ーのダイナミックレンジ拡大方法において、 前記第１電気量検出回路出力と前記第２電気量検出回路
出力とを切り換えて前記第１保護リレー要素へ入力する
切り換え手段と、前記第２電気量検出回路の出力とあら
かじめ定めた値とを比較して前記切り換え手段に対して
切り換え指令を出力する切り換え指令発生手段とを備
え、 前記第２電気量検出回路出力があらかじめ定めた値より
小さい場合には、前記第１保護リレー要素へは第２電気
量検出器出力が入力され、前記第２電気量検出回路出力
があらかじめ定めた値を上回った場合には、前記切り換
え指令発生手段は切り換え手段に対して切り換え指令を
与え、第１保護リレー要素への入力を、第２電気量検出
回路出力から前記第１電気量検出回路出力に切り換える
ことを特徴とする保護リレーのダイナミックレンジ拡大
方法。2. A first electricity quantity detecting circuit for detecting a high level electricity quantity, a first protection relay element which operates according to an output of the first electricity quantity detecting circuit, and a low level electricity quantity. A method of expanding a dynamic range of a protection relay, comprising: a second electricity quantity detection circuit; and a second protection relay element that operates according to an output of the second electricity quantity detection circuit, wherein the first electricity quantity detection circuit output and the first electricity quantity detection circuit Switching means for switching the output of the second electric quantity detection circuit and inputting to the first protection relay element is compared with the switching means by comparing the output of the second electric quantity detection circuit with a predetermined value. Switching command generating means for outputting a command, and when the second electric quantity detection circuit output is smaller than a predetermined value, the second electric quantity detector output is input to the first protection relay element. When the output of the second electric quantity detection circuit exceeds a predetermined value, the switching command generating means gives a switching command to the switching means, and the input to the first protection relay element is changed to the second electric quantity. A method for expanding a dynamic range of a protection relay, wherein the detection circuit output is switched to the first electric quantity detection circuit output.
出回路と、該第１電気量検出回路の出力に応じて動作す
る第１保護リレー要素と、低レベルの電気量を検出する
第２電気量検出回路と、該第２電気量検出回路の出力に
応じて動作する第２保護リレー要素とを備えた保護リレ
ーのダイナミックレンジ拡大方法において、 前記第１電気量検出回路出力と前記第２電気量検出回路
出力とを切り換えて前記第２保護リレー要素へ入力する
切り換え手段と、前記第２電気量検出回路の出力とあら
かじめ定めた値とを比較して前記切り換え手段に対して
切り換え指令を出力する切り換え指令発生手段とを備
え、 前記第２電気量検出回路出力があらかじめ定めた値より
小さい場合には、前記第２保護リレー要素へは第２電気
量検出器出力が入力され、前記第２電気量検出回路出力
があらかじめ定めた値を上回った場合には、前記切り換
え指令発生手段は切り換え手段に対して切り換え指令を
与え、第２保護リレー要素への入力を、第２電気量検出
回路出力から前記第１電気量検出回路出力に切り換える
ことを特徴とする保護リレーのダイナミックレンジ拡大
方法。3. A first electricity quantity detecting circuit for detecting a high level electricity quantity, a first protection relay element which operates according to an output of the first electricity quantity detecting circuit, and a low level electricity quantity. A method of expanding a dynamic range of a protection relay, comprising: a second electricity quantity detection circuit; and a second protection relay element that operates according to an output of the second electricity quantity detection circuit, wherein the first electricity quantity detection circuit output and the first electricity quantity detection circuit Switching means for switching the output of the second electric quantity detection circuit and inputting to the second protection relay element is compared with the switching means by comparing the output of the second electric quantity detection circuit with a predetermined value. Switching command generating means for outputting a command, and when the second electric quantity detection circuit output is smaller than a predetermined value, the second electric quantity detector output is input to the second protection relay element. When the output of the second electric quantity detection circuit exceeds a predetermined value, the switching command generating means gives a switching command to the switching means, and the input to the second protection relay element is changed to the second electric quantity. A method for expanding a dynamic range of a protection relay, wherein the detection circuit output is switched to the first electric quantity detection circuit output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12766293A JP3257143B2 (en) | 1993-05-31 | 1993-05-31 | How to extend the dynamic range of protection relays |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12766293A JP3257143B2 (en) | 1993-05-31 | 1993-05-31 | How to extend the dynamic range of protection relays |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06343222A true JPH06343222A (en) | 1994-12-13 |
| JP3257143B2 JP3257143B2 (en) | 2002-02-18 |
Family
ID=14965625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12766293A Expired - Lifetime JP3257143B2 (en) | 1993-05-31 | 1993-05-31 | How to extend the dynamic range of protection relays |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3257143B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019208294A (en) * | 2018-05-28 | 2019-12-05 | 日新電機株式会社 | Range switching method of protection relay |
-
1993
- 1993-05-31 JP JP12766293A patent/JP3257143B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019208294A (en) * | 2018-05-28 | 2019-12-05 | 日新電機株式会社 | Range switching method of protection relay |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3257143B2 (en) | 2002-02-18 |
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