JPH09233680A - Power failure detector - Google Patents
Power failure detectorInfo
- Publication number
- JPH09233680A JPH09233680A JP8034665A JP3466596A JPH09233680A JP H09233680 A JPH09233680 A JP H09233680A JP 8034665 A JP8034665 A JP 8034665A JP 3466596 A JP3466596 A JP 3466596A JP H09233680 A JPH09233680 A JP H09233680A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- phase
- power failure
- power
- fuse
- 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
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、自家用発電設備を
備えた需要家に設置して、その検出出力を発電機の始
動、負荷選択等の制御に供する停電検出装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power failure detection device which is installed in a customer equipped with a private power generation facility and whose detection output is used for starting a generator, controlling load selection, and the like.
【０００２】[0002]
【従来の技術】送電側（商用電源側）に停電事故が生じ
た場合、需要家では図２に示すように計器用変圧器（Ｐ
Ｔ）２の２次側に設けた１台の単相形交流不足電圧継電
器（ＵＶＲ）１で停電を検出し、負荷の切り離しや自家
用発電機の始動を行うようにしている。ＰＴ２の１次側
には１次ヒューズ（ＰＦ）３が、２次側には２次ヒュー
ズ（Ｆ）４がそれぞれ接続され、２次ヒューズ４の保護
継電器回路側にはＰＴ端子（ＰＴＴ）５が設けられてい
る。2. Description of the Related Art When a power outage occurs on the power transmission side (commercial power supply side), a consumer uses a transformer (P
T) 2 has a single-phase AC undervoltage relay (UVR) 1 provided on the secondary side to detect a power failure, disconnect the load, and start the private generator. A primary fuse (PF) 3 is connected to the primary side of PT2, a secondary fuse (F) 4 is connected to the secondary side, and a PT terminal (PTT) 5 is attached to the protective relay circuit side of the secondary fuse 4. Is provided.
【０００３】[0003]
【発明が解決しようとする課題】このように１台の単相
形不足電圧継電器で停電検出回路を構成した場合、本来
の検出目的である送電側事故による停電だけでなく、Ｐ
Ｔ２の１次または２次ヒューズ３、４の溶断や接続不良
でも単相形不足電圧継電器１が動作するため、不要な自
家用発電設備の稼働制御が開始される。When the power failure detection circuit is composed of one single-phase undervoltage relay as described above, not only the power failure due to the accident on the power transmission side, which is the original purpose of detection, but also P
Since the single-phase undervoltage relay 1 operates even if the primary or secondary fuses 3 and 4 of T2 are blown or the connection is defective, unnecessary operation control of the private power generation equipment is started.
【０００４】そこで本発明は、上記課題を解決し、停電
原因の識別が可能で、自家用発電設備の適確な稼働制御
を行うことができる停電検出装置を提供することを目的
とする。Therefore, an object of the present invention is to solve the above problems, to provide a power failure detecting device capable of identifying the cause of a power failure and performing appropriate operation control of a private power generation facility.
【０００５】[0005]
【課題を解決するための手段】本発明は、３相交流の商
用電源の電圧を１次、２次ヒューズを有する計器用変圧
器で変圧して保護継電器回路の入力とする、自家用発電
機を備えた受電設備において、保護継電器回路の入力側
の３相の各相間に設けた３台の単相形交流不足電圧継電
器と、３台の単相形交流不足電圧継電器の全ての動作時
に停電と判別して、自家用発電設備による電力供給への
切り替え制御信号を発生し、３台の単相形交流不足電圧
継電器のいずれかの動作時に停電検出を優先条件にヒュ
ーズ断と判別して、その旨の警報信号を発生する電圧喪
失原因識別回路とを備えたことを特徴とするものであ
り、ヒューズ断の時には負荷の切り離しや発電機の始動
といった自家用発電設備の稼働制御を開始することがな
くなり、適切に自家用発電設備を運用できる。DISCLOSURE OF THE INVENTION The present invention relates to a private generator which transforms the voltage of a commercial power source of three-phase AC with an instrument transformer having primary and secondary fuses and uses it as an input of a protective relay circuit. In the provided power receiving equipment, it is determined that there is a power failure when all three single-phase AC undervoltage relays and three single-phase AC undervoltage relays installed between the three phases on the input side of the protective relay circuit are in operation. Generates a control signal to switch to the power supply by the private power generation equipment, and when any one of the three single-phase AC undervoltage relays is operating, the power failure detection is determined as a priority condition to determine that the fuse has blown, and an alarm signal to that effect. It is characterized by having a voltage loss cause identification circuit that generates a voltage loss.When the fuse is blown, the operation control of the private power generation equipment such as disconnection of the load and start of the generator is not started, and it is possible to appropriately It can be operated power generation equipment.
【０００６】[0006]
【発明の実施の形態】図１に本発明の一実施形態を示
す。図中、１ＲＳはＲ、Ｓ相間に設けた単相形交流不足
電圧継電器、１ＳＴはＳ、Ｔ相間に設けた単相形交流不
足電圧継電器、１ＴＲはＴ、Ｒ相間に設けた単相形交流
不足電圧継電器、２は計器用変圧器（ＰＴ）、３はＰＴ
１次ヒューズ、４はＰＴ２次ヒューズである。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of the present invention. In the figure, 1RS is a single-phase AC undervoltage relay provided between the R and S phases, 1ST is a single-phase AC undervoltage relay provided between the S and T phases, and 1TR is a single-phase AC undervoltage relay provided between the T and R phases. 2 is an instrument transformer (PT), 3 is PT
Primary fuses 4 are PT secondary fuses.
【０００７】即ち、３相交流の商用電源の電圧を１次、
２次ヒューズ３、４を有する計器用変圧器２で変圧して
保護継電器回路の入力とした場合、保護継電器回路の入
力側（計器用変圧器２の２次側）の各相間に単相形交流
不足電圧継電器１ＲＳ、１ＳＴ、１ＴＲを設けている。That is, the voltage of the commercial power supply for three-phase alternating current is
Single-phase AC between each phase of the input side of the protective relay circuit (secondary side of the transformer 2 for meters) when the voltage is transformed by the transformer 2 for meters which has the secondary fuses 3 and 4 and used as the input of the protective relay circuit. Undervoltage relays 1RS, 1ST, 1TR are provided.
【０００８】そして、３台の単相形交流不足電圧継電器
１ＲＳ、１ＳＴ、１ＴＲの出力をＡＮＤ回路１１とＯＲ
回路１２の入力とし、ＡＮＤ回路１１の出力をインヒビ
ット回路１３のインヒビット端子の入力、ＯＲ回路１２
の出力を他の入力端子の入力としている。ＡＮＤ回路１
１の条件成立で停電（送電側事故による停電）と判別し
て、制御信号発生部１４から自家用発電設備の稼働制御
信号（自家用発電機の始動、負荷の切り離しを行う制御
信号）を発生し、ＯＲ回路１２の条件成立時に停電検出
（ＡＮＤ回路１１の条件成立）を優先条件にヒューズ断
（ヒューズ溶断、接続不良）と判別して、警報信号発生
部１５からヒューズ断の警報信号を発生するようにして
いる。つまり、ＰＴ２の２次側の電圧喪失時にその原因
を判別する電圧喪失原因識別回路を構成している。The outputs of the three single-phase AC undervoltage relays 1RS, 1ST, 1TR are ORed with the AND circuit 11.
The output of the AND circuit 11 is input to the inhibit terminal of the inhibit circuit 13, and the OR circuit 12 is used as the input of the circuit 12.
The output of is used as the input of the other input terminal. AND circuit 1
When the condition 1 is satisfied, it is determined that there is a power failure (power failure due to a power transmission side accident), and the control signal generation unit 14 generates an operation control signal for the private power generation facility (a control signal for starting the private power generator and disconnecting the load), When the condition of the OR circuit 12 is satisfied, a power failure detection (condition of the AND circuit 11 is satisfied) is used as a priority condition to determine that the fuse is blown (blown fuse, defective connection), and the warning signal generation unit 15 generates a fuse blown warning signal. I have to. That is, a voltage loss cause identifying circuit is configured to determine the cause of the voltage loss on the secondary side of PT2.
【０００９】次に、動作について述べる。送電側事故に
よる停電の場合は、３台の単相形交流不足電圧継電器１
ＲＳ、１ＳＴ、１ＴＲが全て動作し、ＡＮＤ回路１１の
条件が成立して制御信号発生部１４から自家用発電設備
の稼働制御信号（自家用発電機の始動、負荷の切り離し
を行う制御信号）が発生する。この時、インヒビット回
路１３の出力は「Ｌ」レベルである。このため、ヒュー
ズ断の警報動作は行われない。Next, the operation will be described. In case of power failure due to power transmission side accident, three single-phase AC undervoltage relays 1
RS, 1ST, 1TR all operate, the condition of the AND circuit 11 is satisfied, and the control signal generation unit 14 generates an operation control signal for the private power generation facility (a control signal for starting the private power generator and disconnecting the load). . At this time, the output of the inhibit circuit 13 is at "L" level. Therefore, the warning operation of blown fuse is not performed.
【００１０】送電側が正常で、ＰＴ２の１次または２次
ヒューズ３または４の一つが溶断した場合は、溶断した
ヒューズの相に関連する単相形交流不足電圧継電器のみ
が動作する。このため、ＯＲ回路１２の条件は成立して
もＡＮＤ回路１１の条件は不成立で、インヒビット回路
１３の出力は「Ｈ」レベルとなり、警報信号発生部１５
からヒューズ断の警報信号が発生する。When the power transmission side is normal and one of the primary or secondary fuses 3 or 4 of PT2 is blown, only the single-phase AC undervoltage relay associated with the blown fuse phase is activated. Therefore, even if the condition of the OR circuit 12 is satisfied, the condition of the AND circuit 11 is not satisfied, the output of the inhibit circuit 13 becomes the “H” level, and the alarm signal generation unit 15
A fuse blown alarm signal is generated from.
【００１１】[0011]
【発明の効果】以上のように本発明によれば、３台の単
相形交流不足電圧継電器を設け、その出力の組み合わせ
で電圧喪失原因を判別するようにしたので、送電側事故
による停電か、保護回路側のヒューズ断による電圧喪失
かを適確に識別することができるようになる。この結
果、負荷の切り離しや自家用発電機の始動といった自家
用発電設備の稼働制御は送電側事故による停電時のみ適
切に行うことができる。しかも、ヒューズ断の警報によ
りその異常を迅速に知ることができる。As described above, according to the present invention, three single-phase AC undervoltage relays are provided, and the cause of the voltage loss is determined by the combination of the outputs. It becomes possible to accurately identify whether or not the voltage is lost due to the fuse blown on the protection circuit side. As a result, the operation control of the private power generation equipment, such as the disconnection of the load and the start of the private power generator, can be appropriately performed only during a power failure due to a power transmission side accident. Moreover, the abnormality can be promptly known by the fuse blow alarm.
【図１】本発明の一実施形態を示す回路構成図。FIG. 1 is a circuit diagram showing an embodiment of the present invention.
【図２】従来例の構成を示す接続図。FIG. 2 is a connection diagram showing a configuration of a conventional example.
１ＲＳ…Ｒ、Ｓ相間の単相形交流不足電圧継電器 １ＳＴ…Ｓ、Ｔ相間の単相形交流不足電圧継電器 １ＴＲ…Ｔ、Ｒ相間の単相形交流不足電圧継電器 ２…ＰＴ ３…ＰＴ１次ヒューズ ４…ＰＴ２次ヒューズ １１…ＡＮＤ回路 １２…ＯＲ回路 １３…インヒビット回路 １４…自家用発電設備稼働制御信号（停電検出信号）発
生部 １５…ヒューズ断警報信号（ヒューズ断検出信号）発生
部1RS ... Single-phase AC undervoltage relay between R and S phases 1ST ... Single-phase AC undervoltage relay between S and T phases 1TR ... Single-phase AC undervoltage relay between T and R phases 2 ... PT 3 ... PT Primary fuse 4 ... PT2 Next fuse 11 ... AND circuit 12 ... OR circuit 13 ... Inhibit circuit 14 ... Private power generation facility operation control signal (power failure detection signal) generator 15 ... Fuse blown alarm signal (fuse blown detection signal) generator
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｈ０２Ｈ 3/24 Ｈ０２Ｈ 3/24 Ｄ 3/253 3/253 Ｈ０２Ｊ 9/00 Ｈ０２Ｊ 9/00 Ｐ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical indication H02H 3/24 H02H 3/24 D 3/253 3/253 H02J 9/00 H02J 9/00 P
Claims (1)
ヒューズを有する計器用変圧器で変圧して保護継電器回
路の入力とする、自家用発電機を備えた受電設備におい
て、保護継電器回路の入力側の３相の各相間に設けた３
台の単相形交流不足電圧継電器と、３台の単相形交流不
足電圧継電器の全ての動作時に停電と判別して、自家用
発電設備による電力供給への切り替え制御信号を発生
し、３台の単相形交流不足電圧継電器のいずれかの動作
時に停電検出を優先条件としてヒューズ断と判別し、そ
の旨の警報信号を発生する電圧喪失原因識別回路とを備
えたことを特徴とする停電検出装置。1. A protective relay in a power receiving facility equipped with a private generator, which transforms a voltage of a commercial power supply of a three-phase alternating current with an instrument transformer having primary and secondary fuses to be used as an input of a protective relay circuit. 3 provided between each of the 3 phases on the input side of the circuit
Single-phase AC undervoltage relay and all three single-phase AC undervoltage relays are judged to have a power failure during all operations, and a switching control signal for power supply by the private power generation equipment is generated to generate three single-phase AC A power failure detection device comprising a voltage loss cause identification circuit that determines a fuse failure as a priority condition when any one of the AC undervoltage relays is operating and determines that a fuse has blown, and generates an alarm signal to that effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8034665A JPH09233680A (en) | 1996-02-22 | 1996-02-22 | Power failure detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8034665A JPH09233680A (en) | 1996-02-22 | 1996-02-22 | Power failure detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09233680A true JPH09233680A (en) | 1997-09-05 |
Family
ID=12420739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8034665A Pending JPH09233680A (en) | 1996-02-22 | 1996-02-22 | Power failure detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09233680A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5602278B1 (en) * | 2013-05-17 | 2014-10-08 | 中国電力株式会社 | Pillar failure detection area warning system |
| JP2016152674A (en) * | 2015-02-17 | 2016-08-22 | 三菱電機株式会社 | Protective relay device |
| CN110794196A (en) * | 2018-08-01 | 2020-02-14 | 中兴通讯股份有限公司 | Alternating current power failure detection method and device and communication equipment |
-
1996
- 1996-02-22 JP JP8034665A patent/JPH09233680A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5602278B1 (en) * | 2013-05-17 | 2014-10-08 | 中国電力株式会社 | Pillar failure detection area warning system |
| JP2016152674A (en) * | 2015-02-17 | 2016-08-22 | 三菱電機株式会社 | Protective relay device |
| CN110794196A (en) * | 2018-08-01 | 2020-02-14 | 中兴通讯股份有限公司 | Alternating current power failure detection method and device and communication equipment |
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