JP5888941B2 - Protective relay - Google Patents

Protective relay Download PDF

Info

Publication number
JP5888941B2
JP5888941B2 JP2011249497A JP2011249497A JP5888941B2 JP 5888941 B2 JP5888941 B2 JP 5888941B2 JP 2011249497 A JP2011249497 A JP 2011249497A JP 2011249497 A JP2011249497 A JP 2011249497A JP 5888941 B2 JP5888941 B2 JP 5888941B2
Authority
JP
Japan
Prior art keywords
circuit breaker
protection processing
control output
contact
breaker control
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.)
Active
Application number
JP2011249497A
Other languages
Japanese (ja)
Other versions
JP2013106456A (en
Inventor
笹川 悟
悟 笹川
友安 啓介
啓介 友安
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2011249497A priority Critical patent/JP5888941B2/en
Publication of JP2013106456A publication Critical patent/JP2013106456A/en
Application granted granted Critical
Publication of JP5888941B2 publication Critical patent/JP5888941B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Description

この発明は、電力系統の保護に用いられる保護継電器に関し、特に、自己動作を監視する常時監視機能を備えた保護継電器に関するものである。   The present invention relates to a protective relay used for protecting a power system, and more particularly to a protective relay having a constant monitoring function for monitoring self-operation.

保護継電器は、電力系統の異常を検出して遮断器を制御することにより電力系統の保護を行うもので、この種の保護継電器として従来、装置内の故障等による遮断器の誤制御を防止して信頼性向上を図るため、自己の動作を監視する常時監視機能を有する保護処理部を二重化して並列動作させるとともに、各保護処理部の遮断器制御出力接点を直列に接続したものがある。   A protective relay protects the power system by detecting an abnormality in the power system and controlling the circuit breaker. This type of protective relay has conventionally prevented erroneous control of the circuit breaker due to a failure in the device. In order to improve reliability, there are some protection processing units having a constant monitoring function for monitoring their own operation, which are operated in parallel, and the circuit breaker control output contacts of each protection processing unit are connected in series.

この場合、各保護処理部において、内部異常を発見した場合や自己診断を実施するために保護機能を停止している場合など、遮断器制御出力接点を制御できない状態が生じた場合(以下、これらを内部異常という)、各保護処理部における遮断器制御出力接点の制御を無効とし、装置の誤動作を防止する必要がある。   In this case, when a state in which the circuit breaker control output contact cannot be controlled occurs, such as when an internal abnormality is detected in each protection processing unit or when the protection function is stopped to perform self-diagnosis (hereinafter referred to as these It is necessary to invalidate the control of the circuit breaker control output contact in each protection processing unit to prevent malfunction of the device.

そのため、従来技術では、各保護処理部において、遮断器制御出力接点に並列にバイパス制御接点を付加するとともに、この各保護処理部の遮断器制御出力接点とバイパス制御接点の並列回路を各々直列二重化して接続した構成としたものが提案されている。(特許文献1、2参照) Therefore, in the prior art, in each protection processing unit, a bypass control contact is added in parallel to the circuit breaker control output contact, and the parallel circuit of the circuit breaker control output contact and bypass control contact of each protection processing unit is duplicated in series. What has been configured to be connected is proposed. (See Patent Documents 1 and 2)

このような特許文献1、2に記載された従来技術では、各々の保護処理部が内部異常もなく正常な場合、電力系統に異常が生じたときには、各保護処理部のバイパス制御接点は共に開状態で、遮断器制御出力接点が共に閉となるので、遮断器がトリップされて系統が保護される。   In the conventional techniques described in Patent Documents 1 and 2, when each protection processing unit is normal without any internal abnormality, and when an abnormality occurs in the power system, the bypass control contacts of each protection processing unit are both opened. In this state, since both circuit breaker control output contacts are closed, the circuit breaker is tripped to protect the system.

また、保護処理部の一方が内部異常を生じた場合には、当該内部異常を生じた保護処理部における常時監視機能によってバイパス制御接点が閉となり、遮断器制御出力接点の開閉状態に依存せずに電流が流れるため、内部異常を生じた保護処理部による遮断器制御出力接点の誤動作が防止される。そして、電力系統に異常が生じたときには、正常な側の各保護処理部のバイパス制御接点は開状態のままで、遮断器制御出力接点が閉となるので、遮断器がトリップされて電力系統が保護される。   In addition, when one of the protection processing units has an internal abnormality, the bypass control contact is closed by the continuous monitoring function in the protection processing unit in which the internal abnormality has occurred, and does not depend on the open / close state of the circuit breaker control output contact. Therefore, the malfunction of the circuit breaker control output contact by the protection processing unit that caused the internal abnormality is prevented. When an abnormality occurs in the power system, the bypass control contact of each protection processing unit on the normal side remains open, and the circuit breaker control output contact is closed. Protected.

特許第3256639号公報Japanese Patent No. 3256539 実用新案登録第2591452号公報Utility Model Registration No. 2591452

しかしながら、上記の特許文献1、2に記載されているような従来の保護継電器では、保護処理部を二重化するとともに、各保護処理部の遮断器制御出力接点に対してバイパス制御接点を並列接続し、この並列回路を各々直列二重化して接続した構成とした場合であっても、依然として保護継電器としての信頼性を損なう事態が生じることがある。   However, in the conventional protection relay as described in Patent Documents 1 and 2 above, the protection processing unit is duplicated and the bypass control contact is connected in parallel to the circuit breaker control output contact of each protection processing unit. Even when the parallel circuits are connected in series, the reliability as a protective relay may still be impaired.

すなわち、二重化された保護処理部の一方が内部異常を生じても、内部異常の無い保護処理部が正常に動作するため、信頼性は保たれるものの、各保護処理部が運悪く共に
内部異常を生じた場合、常時監視機能により各バイパス制御接点が共に閉状態となる。すると、各保護処理部のバイパス制御接点を経由して電流が流れて遮断器制御出力が発生し、その結果、遮断器がトリップされてしまうという不具合を生じる。
In other words, even if one of the duplicated protection processing units has an internal abnormality, the protection processing unit without internal abnormality operates normally, so that reliability is maintained, but each protection processing unit is unfortunately both internal abnormality When this occurs, the bypass control contacts are both closed by the constant monitoring function. Then, a current flows through the bypass control contact of each protection processing unit to generate a circuit breaker control output. As a result, the circuit breaker is tripped.

このような誤作動を防止するためには、例えば、各保護処理部の常時監視機能を共に監視し、常時監視機能により双方の保護処理部に内部異常が生じたと判断されたときには、バイパス制御接点が共に閉じることがないように、常時監視機能によるバイパス制御接点の閉動作をロックさせるインタロック回路を設けることも可能である。   In order to prevent such a malfunction, for example, the continuous monitoring function of each protection processing unit is monitored together, and when it is determined by the continuous monitoring function that an internal abnormality has occurred in both protection processing units, the bypass control contact It is also possible to provide an interlock circuit that locks the closing operation of the bypass control contact by the constant monitoring function so that they are not closed together.

しかし、このような構成とする場合には、上記のインタロック回路を設けることに加えて、各保護処理部の常時監視機能の状態を更に監視する監視機能部なども付加せねばならず、部品点数が増加して複雑化することにより、生産原価が上昇するとともに装置全体の信頼度が低下する課題がある。   However, in such a configuration, in addition to providing the above-described interlock circuit, a monitoring function unit for further monitoring the state of the constant monitoring function of each protection processing unit must be added. As the number of points increases and becomes complicated, there is a problem that the production cost increases and the reliability of the entire apparatus decreases.

この発明は、上記の課題を解決すべく提案されたもので、その目的とするところは、インタロック回路等が不要で、装置の複雑化を招来することなく、簡易な構成でもって従来よりも信頼性を高めた保護継電器を提供するものである。   The present invention has been proposed in order to solve the above-described problems. The object of the present invention is to eliminate the need for an interlock circuit and the like, and without complicating the apparatus and with a simple configuration, compared with the conventional one. It is intended to provide a protective relay with improved reliability.

この発明に係る保護継電器は、演算処理を行う保護処理部が二重化された保護継電器であって、各保護処理部は、電力系統の電気量をデジタル値に変換する入力変換手段と、この入力変換手段の出力に基づいて電力系統の異常を検出し、この異常検出出力により第一、第二の遮断器制御出力接点を制御する演算手段と、内部状態を監視して内部異常が発生した場合に上記第一、第二の遮断器制御出力接点の動作を抑圧するとともに、バイパス指令を発生し、このバイパス指令に応じてバイパス制御接点を制御する常時監視手段とを有し、上記各演算手段によって制御される第一の遮断器制御出力接点が直列に接続されるとともに、それぞれ一方の保護処理部における上記第一の遮断器制御出力接点に対して並列に、一方の保護処理部における上記バイパス制御接点と他方の保護処理部における第二の遮断器制御出力接点との直列接続体を接続したものである。 The protection relay according to the present invention is a protection relay in which a protection processing unit that performs arithmetic processing is duplicated, and each protection processing unit includes input conversion means that converts an electric quantity of a power system into a digital value, and the input conversion An abnormality in the power system is detected based on the output of the means, and the arithmetic means for controlling the first and second circuit breaker control output contacts by this abnormality detection output, and when an internal abnormality occurs by monitoring the internal state The first and second circuit breaker control output contacts are suppressed, the bypass command is generated, and the constant monitoring means for controlling the bypass control contact according to the bypass command is provided. The first circuit breaker control output contact to be controlled is connected in series, and in parallel with the first circuit breaker control output contact in one protection processing unit, in one protection processing unit Serial is obtained by connecting the series connection of the second circuit breaker control output contact in the bypass control contact and the other protective processor.

また、上記の保護継電器に、それぞれの遮断器制御出力接点と並列にフォトカプラ等で実現された電圧検出手段と入力される電流・電圧信号と同等の試験信号を入力変換手段に与える擬似入力発生手段を付加したものである。   In addition, the above-mentioned protective relay is provided with a pseudo input that gives the input conversion means a test signal equivalent to a voltage detection means implemented by a photocoupler or the like in parallel with each circuit breaker control output contact and an input current / voltage signal. Means are added.

この発明の保護継電器によれば、二重化された保護処理部の各々に設けた、バイパス制御時に閉となる接点とバイパス制御時に開となる接点の双方が同時に閉とならないように制御可能としているので、常時監視手段によって双方の保護処理部に内部異常が生じたと判断された場合でも、誤って遮断器がトリップされてしまうという不具合発生を確実に防止することができる。これにより、従来のようなインタロック回路等が不要となり、また装置の複雑化を招来することなく、簡易な構成でもってより一層信頼性を高めた保護継電器を提供することが可能となる。   According to the protective relay of the present invention, it is possible to control so that both of the contacts that are closed at the time of bypass control and the contacts that are opened at the time of bypass control are not closed at the same time. Even when it is determined by the constant monitoring means that an internal abnormality has occurred in both protection processing units, it is possible to reliably prevent the occurrence of a problem that the circuit breaker is tripped by mistake. As a result, a conventional interlock circuit or the like is not required, and it is possible to provide a protective relay with higher reliability with a simple configuration without incurring complexity of the apparatus.

また、擬似入力回路と電圧検出手段を付加することで各々の保護処理部の特性自動点検が可能となる。   Further, by adding a pseudo input circuit and voltage detection means, it is possible to automatically check the characteristics of each protection processing section.

この発明の実施の形態1に係る保護継電器の構成を示すブロック図である。It is a block diagram which shows the structure of the protection relay which concerns on Embodiment 1 of this invention. この発明の保護継電器の出力接点の動作状態を示す回路図である。It is a circuit diagram which shows the operation state of the output contact of the protection relay of this invention. この発明の実施の形態2に係る保護継電器の構成を示すブロック図である。It is a block diagram which shows the structure of the protection relay which concerns on Embodiment 2 of this invention.

実施の形態1.
図1は、この発明の実施の形態1に係る保護継電器の構成を示すブロック図である。
Embodiment 1.
1 is a block diagram showing a configuration of a protective relay according to Embodiment 1 of the present invention.

図1において、保護継電器は、保護演算処理を行う2つの保護処理部1A、1Bが二重化されている。なお、ここでは、発明の理解を促すため、各保護処理部1A、1Bを区別する必要性に応じて、便宜上、一方の保護処理部1AをA系の保護処理部、他方の保護処理部1BをB系の保護処理部と称する。また、各保護処理部1A、1Bは基本的には同一の構成、機能を有するので、ここでは、A系の保護処理部1Aの構成について詳しく説明する。   In FIG. 1, the protection relay includes two protection processing units 1A and 1B that perform protection calculation processing. Here, in order to facilitate understanding of the invention, according to the necessity of distinguishing the protection processing units 1A and 1B, for convenience, one protection processing unit 1A is designated as an A-system protection processing unit and the other protection processing unit 1B. Is referred to as a B-system protection processing unit. Since each protection processing unit 1A, 1B basically has the same configuration and function, the configuration of the A-type protection processing unit 1A will be described in detail here.

保護処理部1Aは、電力系統の電気量が入力され、この信号をデジタル値に変換する入力変換手段2Aと、この入力変換手段2Aでデジタル値に変換された電力系統の電気量に基づいて実効値演算を実施し、演算結果を予め設定された設定値と比較することで電力系統の異常の有無を検出する演算手段3Aと、保護処理部1Aの内部状態を常に監視し、内部異常が発生した場合には、バイパス指令を発生させる常時監視手段4Aと、
常時監視手段4Aの出力を反転させる否定回路5Aと、この否定回路5Aの出力および演算手段3Aの出力が入力され、その論理積を出力する論理積回路6Aと、この論理積回路6Aの出力によって制御される第一の遮断器制御出力接点7Aおよび第二の遮断器制御出力接点8Aと、常時監視手段4Aの出力によって制御されるバイパス制御接点9Aから構成されている。
The protection processing unit 1A receives an electric quantity of the electric power system, converts the signal into a digital value, and converts the signal into a digital value. The protection processing unit 1A is effective based on the electric quantity of the electric power system converted into a digital value by the input converting means 2A. A value calculation is performed, and the calculation unit 3A that detects the presence or absence of abnormality in the power system by comparing the calculation result with a preset set value and the internal state of the protection processing unit 1A are constantly monitored, and an internal abnormality occurs. If so, always-on monitoring means 4A for generating a bypass command,
The negative circuit 5A that inverts the output of the constant monitoring means 4A, the output of the negative circuit 5A and the output of the arithmetic means 3A are input, the logical product circuit 6A that outputs the logical product, and the output of the logical product circuit 6A. The first breaker control output contact 7A and the second breaker control output contact 8A to be controlled, and the bypass control contact 9A controlled by the output of the constant monitoring means 4A.

ここで、2つの遮断器制御出力接点7A、8Aおよびバイパス制御接点9Aは、常開接点で構成されている。また、常時監視手段4Aは、入力変換手段2A、演算手段3Aを含む保護処理部1Aの内部状態を常に監視し、内部異常が発生した場合には、バイパス指令を発生させ、バイパス制御接点9Aを制御するものである。 Here, the two circuit breaker control output contacts 7A and 8A and the bypass control contact 9A are normally open contacts. Further, the constant monitoring means 4A constantly monitors the internal state of the protection processing unit 1A including the input conversion means 2A and the calculation means 3A. When an internal abnormality occurs, a bypass command is generated and the bypass control contact 9A is set. It is something to control.

このような保護処理部1Aと同様の構成を有する保護処理部1Bとは、論理積回路6A、6Bの出力を受ける第一の遮断器制御出力接点7A、7Bが直列に接続されるとともに、一方の保護処理部1Aにおける第一の遮断器制御出力接点7Aに対して並列に、バイパス制御接点9Aと他方の保護処理部1Bにおける第二の遮断器制御出力接点8Bとの直列接続体が接続されている。また、他方の保護処理部1Bにおける遮断器制御出力接点7Bに対して並列に、バイパス制御接点9Bと一方の保護処理部1Aにおける第二の遮断器制御出力接点8Aとの直列接続体が同様に接続されている。   The protection processing unit 1B having the same configuration as the protection processing unit 1A is configured such that the first circuit breaker control output contacts 7A and 7B that receive the outputs of the AND circuits 6A and 6B are connected in series. In parallel with the first circuit breaker control output contact 7A in the protection processing unit 1A, a series connection body of the bypass control contact 9A and the second circuit breaker control output contact 8B in the other protection processing unit 1B is connected. ing. Further, a series connection body of the bypass control contact 9B and the second circuit breaker control output contact 8A in the one protection processing unit 1A is similarly connected in parallel to the circuit breaker control output contact 7B in the other protection processing unit 1B. It is connected.

なお、演算手段3Aは、具体例として、電力系統の電気量が過電流要素であれば、電流値と限時特性による異常検出、不足電圧要素/過電圧要素であれば、電圧値と動作時間による異常検出、また、地絡方向要素であれば、零相電圧値と零相電流値とその位相差と動作時間による異常検出を行い、電力系統の異常を検出した場合には、遮断器制御出力信号を発生し、この信号により第一の遮断器制御出力接点7A、7Bを制御して遮断器開放コイル10を駆動し、電力系統の事故から設備を保護する。   As a specific example, the arithmetic means 3A detects an abnormality based on a current value and a time limit characteristic if the amount of electricity in the power system is an overcurrent element, and detects an abnormality due to a voltage value and an operating time if it is an undervoltage element / overvoltage element. If it is detected, or if it is a ground fault direction element, it detects an abnormality based on the zero-phase voltage value, zero-phase current value, its phase difference, and operation time. And the first circuit breaker control output contacts 7A and 7B are controlled by this signal to drive the circuit breaker opening coil 10 to protect the facility from the power system accident.

次に、このような遮断器制御出力接点7A、7B、8A、8B、バイパス制御接点9A、9Bで構成される出力回路の制御動作について図2を用いて説明する。
図2は、(1)各保護処理部1A、1Bに内部異常が無く共に正常である場合、(2)B系の保護処理部1Bに内部異常が生じている場合、(3)A系の保護処理部1Aに内部異常が生じている場合、(4)A系、B系の双方の保護処理部1A、1Bに内部異常が生じている場合の、それぞれの各接点状態を示している。
Next, the control operation of the output circuit composed of such circuit breaker control output contacts 7A, 7B, 8A, 8B and bypass control contacts 9A, 9B will be described with reference to FIG.
2 shows that (1) each protection processing unit 1A, 1B is normal without any internal abnormality, (2) if there is an internal abnormality in B-type protection processing unit 1B, (3) A-type When the internal abnormality occurs in the protection processing unit 1A, (4) the respective contact states when the internal abnormality occurs in both the A-system and B-system protection processing units 1A, 1B are shown.

(1)各保護処理部1A、1Bに内部異常が無く共に正常である場合。
この場合、両保護処理部1A、1Bのバイパス制御接点9A、9Bは共に図2(a)に示すように開状態にある。この状態の下で、各保護処理部1A、1Bの演算手段3A、3Bによって電力系統の異常が検出されると、これに応じて遮断器制御出力信号が発生することになり、この信号により、A系、B系の第一の遮断器制御出力接点7A、7Bが共に同時に閉となる。この結果、遮断器開放コイル10を駆動して遮断器(図示せず)をトリップさせ、電力系統の事故から設備を保護させることになる。
(1) When each protection processing unit 1A, 1B is normal without any internal abnormality.
In this case, the bypass control contacts 9A and 9B of both protection processing units 1A and 1B are both in the open state as shown in FIG. Under this state, when an abnormality of the power system is detected by the arithmetic means 3A, 3B of each protection processing unit 1A, 1B, a circuit breaker control output signal is generated accordingly, Both A-system and B-system first circuit breaker control output contacts 7A, 7B are simultaneously closed. As a result, the circuit breaker opening coil 10 is driven to trip a circuit breaker (not shown), thereby protecting the facility from a power system accident.

(2)B系の保護処理部1Bに内部異常が生じている場合。
この場合、B系の常時監視手段4Bによって保護処理部1Bの内部異常が検出されると、これに応じて常時監視手段4Bからバイパス指令が発生され、これにより、バイパス制御接点9Bが閉となり、遮断器制御出力接点7A、8Aに対してバイパス経路が形成される。また、B系の常時監視手段4Bの出力によりB系の遮断器制御接点7B、8Bは開状態を維持され、図2(b)に示すような出力回路を形成する。
(2) An internal abnormality has occurred in the B-system protection processing unit 1B.
In this case, when an internal abnormality of the protection processing unit 1B is detected by the B-system constant monitoring means 4B, a bypass command is generated from the constant monitoring means 4B accordingly, and thereby the bypass control contact 9B is closed, Bypass paths are formed for the circuit breaker control output contacts 7A and 8A. Further, the B-system circuit breaker control contacts 7B and 8B are kept open by the output of the B-system constant monitoring means 4B to form an output circuit as shown in FIG.

この状態の下で、A系の演算手段3Aによって電力系統の異常が検出されると、これに応じて遮断器制御出力信号が発生することになり、この信号により、A系の遮断器制御出力接点7A、8Aが閉となる。このとき、A系のバイパス制御接点9Aは開であり、また、B系のバイパス制御接点9Bは閉であるので、A系の遮断器制御出力接点7A、8AとB系のバイパス制御接点9Bを経由して電流が流れ、遮断器開放コイル10を駆動して遮断器をトリップさせ、電力系統の事故から設備を保護させることになる。   Under this state, when an abnormality in the power system is detected by the A-system arithmetic means 3A, a circuit breaker control output signal is generated accordingly, and this signal causes the A-system circuit breaker control output to be generated. The contacts 7A and 8A are closed. At this time, the A system bypass control contact 9A is open, and the B system bypass control contact 9B is closed, so that the A system breaker control output contacts 7A and 8A and the B system bypass control contact 9B are connected. A current flows through the circuit breaker, and the circuit breaker opening coil 10 is driven to trip the circuit breaker, thereby protecting the facility from a power system accident.

(3)A系の保護処理部1Aに内部異常が生じている場合。
この場合、A系の常時監視手段4Aによって保護処理部1Aの内部異常が検出されると、これに応じてバイパス指令が発生され、これにより、バイパス制御接点9Aが閉となり、遮断器制御出力接点7B、8Bに対してバイパス経路が形成される。また、A系の常時監視手段4A出力によりA系の遮断器制御接点7A、8Aは開状態を維持され、図2(c)に示すような出力回路を形成する。
(3) An internal abnormality has occurred in the A-system protection processing unit 1A.
In this case, when an internal abnormality of the protection processing unit 1A is detected by the A-system constant monitoring means 4A, a bypass command is generated in response thereto, whereby the bypass control contact 9A is closed and the circuit breaker control output contact is closed. A bypass path is formed for 7B and 8B. Further, the A-system circuit breaker control contacts 7A and 8A are maintained open by the output of the A-system constant monitoring means 4A, and an output circuit as shown in FIG. 2C is formed.

この状態の下で、B系の演算手段3Bによって電力系統の異常が検出されると、これに応じて遮断器制御出力信号が発生することになり、この信号により、B系の保護処理部1Bの遮断器制御出力接点7B、8Bが閉となる。このとき、B系のバイパス制御接点9Bは開であり、また、A系のバイパス制御接点9Aは閉であるので、B系の遮断器制御出力接点7B、8BとA系のバイパス制御接点9Aを経由して電流が流れ、遮断器開放コイル10を駆動して遮断器をトリップさせ、電力系統の事故から設備を保護させることになる。   Under this state, when an abnormality of the power system is detected by the B-system arithmetic means 3B, a circuit breaker control output signal is generated accordingly, and this signal causes the B-system protection processing section 1B to be generated. The circuit breaker control output contacts 7B and 8B are closed. At this time, the B system bypass control contact 9B is open and the A system bypass control contact 9A is closed, so that the B system circuit breaker control output contacts 7B and 8B and the A system bypass control contact 9A are connected. A current flows through the circuit breaker, and the circuit breaker opening coil 10 is driven to trip the circuit breaker, thereby protecting the facility from a power system accident.

(4)A系、B系の双方の保護処理部1A、1Bに内部異常が生じている場合。
この場合、A系、B系両方の常時監視手段4A、4Bによって保護処理部1A、1Bの内部異常が検出されると、バイパス指令が発生され、これにより、各バイパス制御接点9A、9Bが共に閉となるが、各遮断器制御出力接点7A、7B、8A、8Bへの制御信号の出力は、否定回路5A、5Bを介して抑圧されることになるため、図2(d)に示すように閉とはならず誤出力が防止される。
(4) A case where an internal abnormality has occurred in both the A-system and B-system protection processing units 1A, 1B.
In this case, when an internal abnormality of the protection processing units 1A and 1B is detected by the continuous monitoring means 4A and 4B of both the A system and the B system, a bypass command is generated, whereby the bypass control contacts 9A and 9B are connected together. Although it is closed, the output of the control signal to each of the circuit breaker control output contacts 7A, 7B, 8A, 8B is suppressed via the negation circuits 5A, 5B, so as shown in FIG. It is not closed and erroneous output is prevented.

以上のように、一対の保護処理部1A、1Bを備えた保護継電器において、第一の遮断器制御出力接点7A、7Bを直列に接続し、それぞれの遮断器制御出力接点7A、7Bに対して並列に、バイパス制御接点9A、9Bと他方の保護処理部1B、1Aの第二の遮断器制御出力接点8B、8Aの直列接続体を接続することによって、簡易な構成で、より信頼性の高い保護継電器を得ることができる。   As described above, in the protective relay including the pair of protection processing units 1A and 1B, the first circuit breaker control output contacts 7A and 7B are connected in series, and the respective circuit breaker control output contacts 7A and 7B are connected. By connecting the serial connection body of the bypass control contact 9A, 9B and the second circuit breaker control output contact 8B, 8A of the other protection processing unit 1B, 1A in parallel, it is simpler and more reliable. A protective relay can be obtained.

ところで、保護継電器は、定期的に特性試験を実施することとされており、入力に試験信号を与えた場合の遮断器制御出力が閉となるまでの動作時間を測定する必要がある。上記の実施の形態1では、それぞれの保護処理部1A、1Bにおける常時監視手段4A、4Bが内部異常を検出した場合、遮断器制御出力7A、7B、8A、8Bを抑圧する構成としたが、特性試験中については、常時監視手段4A、4Bの出力を抑圧しない構成とすることで、保護処理部1A、1Bの特性試験を実施することが可能である。   By the way, it is supposed that the protective relay periodically performs a characteristic test, and it is necessary to measure an operation time until the circuit breaker control output is closed when a test signal is given to the input. In the first embodiment, when the constantly monitoring means 4A, 4B in the protection processing units 1A, 1B detect an internal abnormality, the circuit breaker control outputs 7A, 7B, 8A, 8B are suppressed. During the characteristic test, the characteristic test of the protection processing units 1A and 1B can be performed by adopting a configuration in which the outputs of the monitoring means 4A and 4B are not constantly suppressed.

実施の形態2.
図3はこの特性試験を実施するための実施の形態2に係る保護継電器の構成を示すブロック図であり、実施の形態1に相当する構成部分には同一の符号を付している。
Embodiment 2. FIG.
FIG. 3 is a block diagram showing the configuration of the protective relay according to the second embodiment for carrying out this characteristic test, and the components corresponding to those in the first embodiment are denoted by the same reference numerals.

図において、保護継電器は、実施の形態1に対し、各保護処理部1A、1Bのそれぞれの遮断器制御出力接点7A、7Bと並列に接続されたフォトカプラ等からなる電圧検出手段11A、11Bと、入力される試験信号と同等の入力を常時監視手段4A、4Bからの信号に基づいて入力変換手段2A、2Bに与える擬似入力発生手段12A、12Bを付加したものである。
ここで、遮断器制御出力接点7A、7B、8A、8Bおよびバイパス制御接点9A、9Bからなる出力回路と遮断器開放コイル10は直列接続されており、フォトカプラ等からなる電圧検出手段11A、11Bが第一の遮断器制御出力接点7A、7Bにそれぞれ並列に接続されている。
In the figure, the protection relay is different from that of the first embodiment in that voltage detection means 11A, 11B including photocouplers connected in parallel with the respective circuit breaker control output contacts 7A, 7B of the protection processing units 1A, 1B; , Pseudo input generation means 12A and 12B are provided which give the input conversion means 2A and 2B an input equivalent to the input test signal at all times based on the signals from the monitoring means 4A and 4B.
Here, the output circuit composed of the circuit breaker control output contacts 7A, 7B, 8A, 8B and the bypass control contacts 9A, 9B and the circuit breaker opening coil 10 are connected in series, and voltage detection means 11A, 11B composed of a photocoupler or the like. Are connected in parallel to the first circuit breaker control output contacts 7A and 7B, respectively.

このような構成のもとで、通常状態においては、遮断器制御出力接点7A、7B、8A、8Bおよびバイパス制御接点9A、9Bはすべて開となっており、遮断器開放コイル10には電流が流れない状態に維持されている。このとき、電圧検出手段11A、11Bは、遮断器が動作しない微小電流により電圧を検出する構成としており、電圧検出手段11A、11Bの入力には電源電圧の分圧値が検出される。   Under such a configuration, in the normal state, the circuit breaker control output contacts 7A, 7B, 8A, 8B and the bypass control contacts 9A, 9B are all open, and the circuit breaker opening coil 10 receives current. It is kept out of flow. At this time, the voltage detection means 11A and 11B are configured to detect the voltage by a minute current that does not operate the circuit breaker, and the divided value of the power supply voltage is detected at the input of the voltage detection means 11A and 11B.

次に、遮断器制御出力接点7A、7Bが閉となった場合には、該当する電圧検出手段11A、11Bの入力電圧が0となり、この結果、出力接点が閉となったことを確認することができる。
すなわち、擬似入力変換手段12A、12Bから試験信号を与えた後、電圧検出手段11A、11Bにより遮断器制御出力接点7A、7B両端の電圧を監視することによって保護処理部1A、1Bの特性試験を行わせることが可能となる。
Next, when the breaker control output contacts 7A and 7B are closed, the input voltage of the corresponding voltage detecting means 11A and 11B becomes 0, and as a result, it is confirmed that the output contact is closed. Can do.
That is, after giving a test signal from the pseudo input conversion means 12A, 12B, the voltage detection means 11A, 11B monitors the voltage across the circuit breaker control output contacts 7A, 7B, thereby performing a characteristic test of the protection processing units 1A, 1B. It is possible to make it happen.

以上説明したように、この発明によれば、簡易な構成で、より信頼性の高い保護継電器を得ることができる。
なお、本発明は、その発明の範囲内において、各実施の形態を適宜、変形、省略することが可能である。
As described above, according to the present invention, a more reliable protective relay can be obtained with a simple configuration.
In the present invention, each embodiment can be appropriately modified or omitted within the scope of the invention.

1A、1B:保護処理部 2A、2B:入力変換手段 3A、3B:演算手段
4A、4B:常時監視手段 5A、5B:論理積回路 6A、6B:否定回路
7A、7B:第一の遮断器制御出力接点 8A、8B:第二の遮断器制御出力接点
9A、9B:バイパス制御接点 10:遮断器開放コイル
11A、11B:フォトカプラ 12A、12B:擬似入力発生手段
1A, 1B: protection processing unit 2A, 2B: input conversion means 3A, 3B: calculation means 4A, 4B: constant monitoring means 5A, 5B: AND circuit 6A, 6B: negative circuit 7A, 7B: first circuit breaker control Output contact 8A, 8B: Second circuit breaker control output contact 9A, 9B: Bypass control contact 10: Circuit breaker opening coil 11A, 11B: Photocoupler 12A, 12B: Pseudo input generating means

Claims (3)

演算処理を行う保護処理部が二重化された保護継電器であって、各保護処理部は、電力系統の電気量をデジタル値に変換する入力変換手段と、この入力変換手段の出力に基づいて電力系統の異常を検出し、この異常検出出力により第一、第二の遮断器制御出力接点を制御する演算手段と、内部状態を監視して内部異常が発生した場合に上記第一、第二の遮断器制御出力接点の動作を抑圧するとともに、バイパス指令を発生し、このバイパス指令に応じてバイパス制御接点を制御する常時監視手段とを有し、
上記各演算手段によって制御される第一の遮断器制御出力接点が直列に接続されるとともに、それぞれ一方の保護処理部における上記第一の遮断器制御出力接点に対して並列に、一方の保護処理部における上記バイパス制御接点と他方の保護処理部における第二の遮断器制御出力接点との直列接続体を接続したことを特徴とする保護継電器。
A protection relay in which a protection processing unit that performs arithmetic processing is duplicated, and each protection processing unit includes an input conversion unit that converts an electric quantity of the power system into a digital value, and an electric power system based on an output of the input conversion unit detecting the abnormality, the abnormality detection output by the first, and computing means for controlling the second breaker control output contacts of the first when the internal abnormality occurs to monitor the internal state, the second shut-off of And a constant monitoring means for suppressing the operation of the device control output contact, generating a bypass command, and controlling the bypass control contact in accordance with the bypass command,
The first circuit breaker control output contact controlled by each arithmetic means is connected in series, and one protection process is performed in parallel with the first circuit breaker control output contact in one protection processing section. A protective relay in which a series connection body of the bypass control contact in the section and the second circuit breaker control output contact in the other protection processing section is connected.
上記常時監視手段の出力を反転し、この出力と上記演算手段の出力とを論理積回路を通して上記第一の遮断器制御出力接点を制御させるようにしたことを特徴とする請求項1記載の保護継電器。   2. The protection according to claim 1, wherein the output of said constant monitoring means is inverted, and this output and the output of said arithmetic means are controlled by said first circuit breaker control output contact through an AND circuit. relay. 二重化された保護処理部における上記第一の遮断器制御出力接点と並列に接続され、その両端の電圧を監視する電圧検出手段と、上記入力変換手段に試験信号を与える擬似入力発生手段を付加したことを特徴とする請求項1または請求項2記載の保護継電器。   A voltage detection means connected in parallel with the first circuit breaker control output contact in the duplicated protection processing section and monitoring the voltage at both ends thereof, and a pseudo input generation means for giving a test signal to the input conversion means are added. The protective relay according to claim 1 or 2, characterized by the above.
JP2011249497A 2011-11-15 2011-11-15 Protective relay Active JP5888941B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2011249497A JP5888941B2 (en) 2011-11-15 2011-11-15 Protective relay

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2011249497A JP5888941B2 (en) 2011-11-15 2011-11-15 Protective relay

Publications (2)

Publication Number Publication Date
JP2013106456A JP2013106456A (en) 2013-05-30
JP5888941B2 true JP5888941B2 (en) 2016-03-22

Family

ID=48625610

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2011249497A Active JP5888941B2 (en) 2011-11-15 2011-11-15 Protective relay

Country Status (1)

Country Link
JP (1) JP5888941B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6203676B2 (en) * 2014-05-21 2017-09-27 株式会社日立製作所 Digital protection relay system
JP6643957B2 (en) * 2016-07-08 2020-02-12 東芝三菱電機産業システム株式会社 Power converter and control method therefor
IT201700004876A1 (en) 2017-01-18 2018-07-18 Enel Green Power Spa Solar cell apparatus and relative production method for single cells, tandems and heterojunction systems

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000069658A (en) * 1998-08-21 2000-03-03 Toshiba Corp Dual outputting method for digital relay
JP2006050813A (en) * 2004-08-05 2006-02-16 Toshiba Corp Digital relay device
JP5426412B2 (en) * 2010-01-22 2014-02-26 三菱電機株式会社 Protective relay

Also Published As

Publication number Publication date
JP2013106456A (en) 2013-05-30

Similar Documents

Publication Publication Date Title
RU2469342C1 (en) Method and apparatus for controlling secondary circuit measuring transformer in electric power system
CN107408808B (en) triple redundant digital protective relay and method of operation
JP5433115B1 (en) Process bus protection control system, merging unit and arithmetic unit
EP2805395B1 (en) Voltage regulator over-voltage detection system, method and apparatus
JP4731403B2 (en) Bus protection relay device with comprehensive rearrangement protection function
CN102497002B (en) Fully-duplicated protective redundancy system for direct-current transmission project
EP2843836A1 (en) Solid state power controller and method for monitoring a solid state power controller
JP5888941B2 (en) Protective relay
JP5426412B2 (en) Protective relay
KR20170124817A (en) Digital triple protection relay system
JP5645535B2 (en) Protective relay system for multi-terminal transmission systems
JP5489742B2 (en) Protective relay
JP5288757B2 (en) Electronic circuit breaker
JP2005312180A (en) Digital protective relay system
JP2006345699A (en) Protection device for load circuits
JP2005020862A (en) Protective relay device
JP6698414B2 (en) Power transmission line protection system
Dustegor et al. A distributed fault protection method for power grid with high penetration of renewable energy sources
JPWO2004042883A1 (en) Protective relay
JP5752845B2 (en) Integrated unit and protection relay system
US9293908B2 (en) Method of measurement for detecting a fault of a three-phase zone
JP3868425B2 (en) Mechanism for preventing malfunction of digital protection relays for power systems.
CN106684840A (en) Exit method under unavailable condition of DC protection in DC pole control systems
CN107589733B (en) Method and system for generating controller diagnosis signal, protecting fault and ensuring functional safety
JP6645759B2 (en) Current differential relay system

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20141023

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20150616

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20150617

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20150728

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20160119

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20160216

R151 Written notification of patent or utility model registration

Ref document number: 5888941

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R151

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250