JPH02184228A - Power interruption detector - Google Patents

Power interruption detector

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Publication number
JPH02184228A
JPH02184228A JP64000500A JP50089A JPH02184228A JP H02184228 A JPH02184228 A JP H02184228A JP 64000500 A JP64000500 A JP 64000500A JP 50089 A JP50089 A JP 50089A JP H02184228 A JPH02184228 A JP H02184228A
Authority
JP
Japan
Prior art keywords
power
signal
power flow
switching
power system
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.)
Pending
Application number
JP64000500A
Other languages
Japanese (ja)
Inventor
Koji Shirahama
白濱　浩二
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 JP64000500A priority Critical patent/JPH02184228A/en
Publication of JPH02184228A publication Critical patent/JPH02184228A/en
Pending legal-status Critical Current

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  • Supply And Distribution Of Alternating Current (AREA)

Abstract

PURPOSE:To prevent mistrip by providing a power flow detector, a contactor switching commander, a time limit device, an AND gate and an interruption commander, and judging that power is not interrupted when power flow is brought to zero due to fluctuation of load or output. CONSTITUTION:When power flow is zero, a power flow detector 51 provides signals A to a contactor switching commander 53 and an AND gate 55. Upon reception of the signal A, switching commander 53 in a contactor provides a signal B to a time limit device 54 and provides a switching command C to a switching contactor 13 thus switching the tap from (b) to (c). Upon reception of the signal B, the time limit device 54 provides a signal D to the AND gate 55. Upon reception of the signals A and D, the AND gate 55 makes judgement of power interruption of an external power system and provides a signal E to an interruption commander 52. Upon reception of the signal E, the interruption commander 52 provides an interruption command F to a link circuit breaker 2 thus opening the link circuit breaker 2 and separating the power system 1.

Description

【発明の詳細な説明】 ［産業上の利用分野］ この発明は、外部電力系統の停電を検出する停電検出装
置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power outage detection device for detecting a power outage in an external power system.

特に、電力潮流が零であることを検出した場合、自動電
圧調整装置の変成器の２次側タップを切換えて、発Ｔ４
機の出力を変化させたときに、電力潮流が零を継続して
いるとき、外部電力系統を停電と判断し、外部電力系統
を解列するので、ミストリップを防止し、自家発電設備
を保護することができる停電検出装置に関するものであ
る。In particular, when it detects that the power flow is zero, it switches the secondary tap of the transformer of the automatic voltage regulator and outputs T4.
When the power flow continues to be zero when changing the output of the machine, it is determined that the external power system is in a power outage and the external power system is disconnected, which prevents mistrips and protects the private power generation equipment. This invention relates to a power outage detection device that can detect power outages.

［従来の技術］ 従来例の構成を第２図を参照しながら説明する。[Conventional technology] The configuration of a conventional example will be explained with reference to FIG.

第２図は、従来の停電検出装置を示す電力系統図である
。FIG. 2 is a power system diagram showing a conventional power outage detection device.

第２図において、（１）は外部電力系統、〈２）はこの
外部電力系統（１）に接続された連絡遮断器、く３）は
外部電力系統（１）と連絡遮断器（２）との間に接続さ
れた計器用変圧器、（４）は連絡遮断器（２）に接続さ
れた計器用変流器、（５）は計器用変圧器（３）の２次
側及び計器用変流器（４）に接続された停電検出装置、
（６）は連絡遮断器（２）に母線を経由して接続された
発電機遮断器、（７）はこの発電機遮断器（６）に接続
された発電機Ｇ、（８）は発電機遮断器（６）に接続さ
れた変成器、（９）はこの変成器（８）の２次側に接続
された自動電圧ｉｌｌ整装置、（１０）は発電機遮断器
（６）に接続された励磁用変圧器、（１１）はこの励磁
用変圧器（１０）の２次側及び自動電圧調整装置（９）
に接続された励磁用整流器、（１２）は連絡遮断器（２
）に母線を経由して接続された負荷設備である。In Figure 2, (1) is the external power system, <2) is the connection breaker connected to this external power system (1), and 3) is the connection between the external power system (1) and the connection breaker (2). (4) is the potential current transformer connected to the communication circuit breaker (2), (5) is the secondary side of the potential transformer (3) and the potential transformer a power failure detection device connected to the sink (4);
(6) is a generator breaker connected to the communication breaker (2) via the busbar, (7) is a generator G connected to this generator breaker (6), and (8) is a generator A transformer (9) is connected to the circuit breaker (6), (9) is an automatic voltage adjustment device connected to the secondary side of this transformer (8), and (10) is connected to the generator circuit breaker (6). The excitation transformer (11) is the secondary side of this excitation transformer (10) and the automatic voltage regulator (9)
The excitation rectifier (12) is connected to the communication breaker (2
) is a load equipment connected via a busbar.

従来の停電検出装置（５）は、計器用変圧器（３）の２
次側及び計器用変流器（４）に接続された電力潮流検出
装置（５１）と、この電力潮流検出装置（５１）及び連
絡遮断器（２）に接続された遮断指令装置（５２）とか
ら構成されている。The conventional power outage detection device (5)
A power flow detection device (51) connected to the next side and the instrument current transformer (4), and a disconnection command device (52) connected to the power flow detection device (51) and the connecting circuit breaker (2). It consists of

つぎに、上述した従来例の動作を説明する。Next, the operation of the above-mentioned conventional example will be explained.

負荷設備（１２）への電力は、外部電力系統（１）から
連絡遮断器（２）を経由して供給される。また、発電機
Ｇ（７）からも発電機遮断器（６）を経由して供給され
る。Electric power to the load equipment (12) is supplied from the external power system (1) via the connection breaker (2). It is also supplied from the generator G (7) via the generator circuit breaker (6).

ところで、外部電力系統（１）の停電は、停電検出装置
（５）によって検出される。Incidentally, a power outage in the external power system (1) is detected by a power outage detection device (5).

すなわち、電力潮流検出装置（５１）は、電力潮流を検
出し、電力潮流が零であれば停電と判断して遮断指令装
置（５２）を動作させる。That is, the power flow detection device (51) detects the power flow, and if the power flow is zero, it determines that there is a power outage and operates the cutoff command device (52).

遮断指令装置（５２）は、遮断指令を連絡遮断器（２）
に出力し、連絡遮断器（２）を開として外部電力系統（
１）を解列する。The cutoff command device (52) communicates the cutoff command to the circuit breaker (2).
output to the external power system (by opening the connection breaker (2)
1).

［発明が解決しようとする課題］ 上述したような従来の停電検出装置では、負荷設備（１
２）の負荷変動、あるいは発電機Ｇ（７）の出力変動に
よる電力潮流が零の場合でも、外部電力系統（１）を停
電と判断して外部電力系統（１）を解列するという問題
点があった。[Problem to be solved by the invention] In the conventional power outage detection device as described above, the load equipment (1
Even if the power flow is zero due to the load fluctuation in 2) or the output fluctuation of generator G (7), the problem is that the external power system (1) is determined to be a power outage and the external power system (1) is disconnected. was there.

この発明は、上述した問題点を解決するためになされた
もので、負荷設備の負荷変動、あるいは発電機の出力変
動による電力潮流が零の場合は停電と判断せず、ミスト
リップを防止することができる停電検出装置を得ること
を目的とする。This invention was made in order to solve the above-mentioned problems, and it is possible to prevent mistrips by not determining a power outage when the power flow is zero due to load fluctuations of load equipment or fluctuations in the output of a generator. The purpose is to obtain a power outage detection device that can perform

［課題を解決するための手段］ この発明に係る停電検出装置は、以下に述べるような手
段を備えたものである。[Means for Solving the Problems] A power outage detection device according to the present invention includes the following means.

（ｉ）、外部電力系統と自家発電設備との連絡部分の電
力潮流を検出する電力潮流検出装置。(i) A power flow detection device that detects power flow in a connecting portion between an external power system and private power generation equipment.

＜ｉｉ）、上記電力潮流が零の場合に自動電圧調整装置
の変成器の２次側タップを切換えるように切換指令を切
換コンダクタに出力するコンダクタ切換指令装置。<ii) A conductor switching command device that outputs a switching command to a switching conductor to switch a secondary tap of a transformer of an automatic voltage regulator when the power flow is zero.

（ｉｉｉ）、上記切換指令の出力から一定時間後に信号
を出力する時限装置。(iii) A timer that outputs a signal after a certain period of time from the output of the switching command.

（ｉｖ）、上記電力潮流が零の場合で上記信号が入力さ
れたとき上記外部電力系統を停電と判断するＡＮＤ論理
装置。(iv) an AND logic device that determines that the external power system is in a power outage when the signal is input when the power flow is zero;

（Ｖ）、このＡＮＤ論理装置の出力に基づいて遮断指令
を上記外部電力系統と上記自家発電設備とを連絡する連
絡遮断器に出力する遮断指令装置。(V) A cutoff command device that outputs a cutoff command to a communication breaker that connects the external power system and the private power generation equipment based on the output of the AND logic device.

［作用］ この発明においては、電力潮流検出装置によって、外部
電力系統と自家発電設備との連絡部分の電力潮流が検出
される。[Operation] In the present invention, the power flow detection device detects the power flow in the connecting portion between the external power system and the private power generation equipment.

また、コンダクタ切換指令装置によって、上記電力潮流
が零の場合に、自動電圧調整装置の変成器の２次側タッ
プを切換えるように、切換指令が切換コンダクタに出力
される。Further, the conductor switching command device outputs a switching command to the switching conductor so as to switch the secondary tap of the transformer of the automatic voltage regulator when the power flow is zero.

さらに、時限装置によって、上記切換指令の出力から一
定時間後に信号が出力される。Further, the timer outputs a signal after a certain period of time from the output of the switching command.

さらに、ＡＮＤ論理装置によって、上記電力潮流が零の
場合で、上記信号が入力されたとき、上記外部電力系統
が停電と判断される。Further, the AND logic device determines that the external power system is in a power outage when the power flow is zero and the signal is input.

そして、遮断指令装置によって、上記ＡＮＤ論理装置の
出力に基づいて、遮断指令が上記外部電力系統と上記自
家発電設備とを連絡する連絡遮断器に出力される。Then, based on the output of the AND logic device, the shutdown command device outputs a shutdown command to the connection breaker that connects the external power system and the private power generation equipment.

したがって、この発明は、負荷設備の負荷変動、あるい
は発電機の出力変動による電力潮流が零の場合は停電と
判断せず、ミストリップを防止することができる。Therefore, according to the present invention, if the power flow is zero due to load fluctuations of load equipment or output fluctuations of a generator, it is not determined that a power outage has occurred, and mistrips can be prevented.

［実施例］ 実施例の構成を第１図を参照しながら説明する。[Example] The configuration of the embodiment will be explained with reference to FIG.

第１図は、この発明の一実施例を示す電力系統図であり
、外部電力系統（１）〜計器用変流器（４）、発電機遮
断器（６）、発電機（７）、及び自動電圧調整装置（９
）〜負荷設備（１２）は上記第２図のものと全く同一で
あり、電力潮流検出装置（５１）及び遮断指令装置（５
２）は上記従来装置のものと全く同一である。FIG. 1 is a power system diagram showing one embodiment of the present invention, and includes an external power system (1) to an instrument current transformer (4), a generator circuit breaker (6), a generator (7), and Automatic voltage regulator (9
) to load equipment (12) are exactly the same as those in Figure 2 above, and include a power flow detection device (51) and a cutoff command device (5
2) is exactly the same as that of the conventional device described above.

第１図において、この発明の一実施例は、上述した従来
装置のものと全く同一のものと、電力潮流検出装置（５
１）及び後述する切換コンダクタ（１３）に接続された
コンダクタ切換指令装置（５３）と、このコンダクタ切
換指令装置（５３）に接続された時限装置（５４）と、
電力潮流検出装置（５１）及び時限装置（５４）に接続
されたＡＮＤ論理装置（５５）とから構成されている。In FIG. 1, one embodiment of the present invention includes a power flow detection device (5
1) and a conductor switching command device (53) connected to a switching conductor (13) to be described later, and a timer (54) connected to this conductor switching command device (53).
It consists of a power flow detection device (51) and an AND logic device (55) connected to a timer (54).

なお、（８＾）は発電ＩＲＭ断器（６）に接続されかつ
２次側にタップ（ｂ）及び（ｃ）を有する変成器、（１
３）はこの変成器（８＾）の２次側のタップ（ｂ）又は
（ｃ）に端子（ａ）が接続された切換コンダクタである
：この発明の自家発電設備は、発電機遮断器（６）と、
発電機Ｇ（７）と、タップ（ｂ）及び（ｅ）を有する変
成器（８＾）と、切換コンダクタ（１３）と、自動電圧
調整装置（９）と、励磁用変圧器（１０）と、励磁用整
流器（１１）とから構成されている。Note that (8^) is a transformer (1) connected to the power generation IRM disconnector (6) and having taps (b) and (c) on the secondary side.
3) is a switching conductor whose terminal (a) is connected to the tap (b) or (c) on the secondary side of this transformer (8^). 6) and
A generator G (7), a transformer (8^) having taps (b) and (e), a switching conductor (13), an automatic voltage regulator (9), and an excitation transformer (10). , and an excitation rectifier (11).

つぎに、上述した実施例の動作を説明する。Next, the operation of the above embodiment will be explained.

外部電力系統（１）の停電は、停電検出袋？ｉ！（５＾
）によって検出される。停電検出装置（５＾）は、電力
潮流が零の場合、変成器（８＾）の２次側のタップを切
換コンダクタ（１３）により切換え、発電機Ｇ（７）の
出力を変化させて電力潮流へ変化を与えた後、電力潮流
が零を継続しているとき、外部電力系統（１）を停電と
判断する。Is there a power outage detection bag for power outages in the external power system (1)? i! (5^
) detected by When the power flow is zero, the power failure detection device (5^) switches the tap on the secondary side of the transformer (8^) with a switching conductor (13), changes the output of the generator G (7), and detects the power. When the power flow continues to be zero after a change is given to the power flow, it is determined that the external power system (1) is in a power outage.

すなわち、電力潮流検出装置（５１）は、電力潮流を検
出し、電力潮流が零であれば信号Ａをコンダクタ切換指
令装置（５３）及びＡＮＤ論理装置（５５）に出力する
。That is, the power flow detection device (51) detects the power flow, and if the power flow is zero, outputs the signal A to the conductor switching command device (53) and the AND logic device (55).

コンダクタ切換指令装置（５３）は、信号Ａが入力され
ると信号Ｂを時限装置（５４）に出力し、かつ切換指令
Ｃを切換コンダクタ（１３）に出力して、切換コンダク
タ（１３）により変成器（８＾）の２次側のタップを（
ｂ）から（ｅ）に切換える。When the signal A is input, the conductor switching command device (53) outputs the signal B to the timer (54), and outputs the switching command C to the switching conductor (13), so that the switching conductor (13) performs conversion. Tap on the secondary side of the vessel (8^) (
Switch from b) to (e).

時限装置（５４）は、信号Ｂの入力後、一定時間（数秒
〜数十秒）後に信号りをＡＮＤ論理装置（５５）に出力
する。The timer (54) outputs the signal B to the AND logic device (55) after a certain period of time (several seconds to tens of seconds) after inputting the signal B.

ＡＮＤ論理装置（５５）は、信号Ａ及び信号りが入力さ
れると、外部電力系統を停電と判断して信号Ｅを遮断指
令装置（５２）に出力する。When the AND logic device (55) receives the signal A and the signal R, it determines that the external power system is in a power outage and outputs the signal E to the cutoff command device (52).

遮断指令装置（５２）は、信号Ｅが入力されると、遮断
指令Ｆを連絡遮断器（２）に出力して、連絡遮断器（２
）を開として外部電力系統（１）を解列する。When the signal E is input, the cutoff command device (52) outputs the cutoff command F to the communication breaker (2), and
) to disconnect the external power system (1).

この発明の一実施例は、上述したように、主要な構成と
して、コンダクタ切換指令装置’！（５３）と、時限装
置（５４）と、ＡＮＤ論理装置（５５）とを備えている
ので、負荷設備の負荷変動や発電機の出力変動によって
電力潮流が零になる場合のミストリップを防止すること
ができるという効果を奏する。As described above, one embodiment of the present invention has a conductor switching command device'! as the main configuration. (53), a timer (54), and an AND logic device (55) to prevent mistrips when the power flow becomes zero due to load fluctuations in load equipment or generator output fluctuations. It has the effect of being able to

［発明の効果コ この発明は、以上説明したとおり、外部電力系統と自家
発電設備との連絡部分の電力潮流を検出する電力潮流検
出装置と、上記電力潮流が零の場合に自動電圧調整装置
の変成器の２次側夕・ンブを切換えるように切換指令を
切換コンダクタに出力するコンダクタ切換指令装置と、
上記切換指令の出力から一定時間後に信号を出力する時
限装置と、上記電力潮流が零の場合で上記信号が入力さ
れたとき上記外部電力系統を停電と判断するＡＮＤ論理
装置と、このＡＮＤ論理装置の出力に基づいて遮断指令
を上記外部電力系統と上記自家発電設備とを連絡する連
絡遮断器に出力する遮断指令装置とを備えたので、負荷
設備の負荷変動、あるいは発電機の出力変動による電力
潮流が零の場合は停電と判断せず、ミストリップを防止
することができるという効果を奏する。[Effects of the Invention] As explained above, the present invention provides a power flow detection device that detects the power flow in a connecting portion between an external power system and private power generation equipment, and an automatic voltage regulator that detects the power flow when the power flow is zero. a conductor switching command device that outputs a switching command to a switching conductor to switch the secondary side conductor of the transformer;
a timer that outputs a signal after a certain period of time from the output of the switching command; an AND logic device that determines that the external power system is in a power outage when the signal is input when the power flow is zero; The present invention is equipped with a cutoff command device that outputs a cutoff command based on the output of If the current is zero, it is not determined that there is a power outage, and mistrips can be prevented.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの発明の一実施例を示す電力系統図、第２図
は従来の停電検出装置を示す電力系統図である。 図において、 （５＾　・・・　停電検出装置、 （５１・・・　電力潮流検出装置、 （５２・・・　遮断指令装置、 （５３・・・　コンダクタ切換指令装置、（５４・・・
　時限装置、 （５５）・・・　ＡＮＤ論理装置である。 なお、各図中、同一符号は同一、又は相当部分を示す。FIG. 1 is a power system diagram showing an embodiment of the present invention, and FIG. 2 is a power system diagram showing a conventional power failure detection device. In the figure, (5^... Power outage detection device, (51... Power flow detection device, (52... Cutoff command device, (53... Conductor switching command device, (54...
Timing device, (55)... is an AND logic device. In each figure, the same reference numerals indicate the same or equivalent parts.

Claims (1)

【特許請求の範囲】[Claims] 外部電力系統と自家発電設備との連絡部分の電力潮流を
検出する電力潮流検出装置、上記電力潮流が零の場合に
自動電圧調整装置の変成器の２次側タップを切換えるよ
うに切換指令を切換コンダクタに出力するコンダクタ切
換指令装置、上記切換指令の出力から一定時間後に信号
を出力する時限装置、上記電力潮流が零の場合で上記信
号が入力されたとき上記外部電力系統を停電と判断する
ＡＮＤ論理装置、及びこのＡＮＤ論理装置の出力に基づ
いて遮断指令を上記外部電力系統と上記自家発電設備と
を連絡する連絡遮断器に出力する遮断指令装置を備えた
ことを特徴とする停電検出装置。A power flow detection device that detects the power flow in the connection between the external power system and the private power generation equipment, and switches a switching command to switch the secondary side tap of the transformer of the automatic voltage regulator when the power flow is zero. A conductor switching command device that outputs to the conductor, a timer that outputs a signal after a certain period of time from the output of the switching command, and an AND that determines that the external power system is in a power outage when the signal is input when the power flow is zero. A power outage detection device comprising: a logic device; and a cutoff command device that outputs a cutoff command to a connecting circuit breaker that connects the external power system and the private power generation equipment based on the output of the AND logic device.
JP64000500A 1989-01-06 1989-01-06 Power interruption detector Pending JPH02184228A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP64000500A JPH02184228A (en) 1989-01-06 1989-01-06 Power interruption detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP64000500A JPH02184228A (en) 1989-01-06 1989-01-06 Power interruption detector

Publications (1)

Publication Number Publication Date
JPH02184228A true JPH02184228A (en) 1990-07-18

Family

ID=11475479

Family Applications (1)

Application Number Title Priority Date Filing Date
JP64000500A Pending JPH02184228A (en) 1989-01-06 1989-01-06 Power interruption detector

Country Status (1)

Country Link
JP (1) JPH02184228A (en)

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