JPH0150302B2 - - Google Patents

Info

Publication number
JPH0150302B2
JPH0150302B2 JP57232575A JP23257582A JPH0150302B2 JP H0150302 B2 JPH0150302 B2 JP H0150302B2 JP 57232575 A JP57232575 A JP 57232575A JP 23257582 A JP23257582 A JP 23257582A JP H0150302 B2 JPH0150302 B2 JP H0150302B2
Authority
JP
Japan
Prior art keywords
short
circuit
current
output
power supply
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.)
Expired
Application number
JP57232575A
Other languages
Japanese (ja)
Other versions
JPS59122323A (en
Inventor
Saburo Takeuchi
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 JP57232575A priority Critical patent/JPS59122323A/en
Publication of JPS59122323A publication Critical patent/JPS59122323A/en
Publication of JPH0150302B2 publication Critical patent/JPH0150302B2/ja
Granted legal-status Critical Current

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  • Emergency Protection Circuit Devices (AREA)
  • Stand-By Power Supply Arrangements (AREA)
  • Control Of Voltage And Current In General (AREA)

Description

【発明の詳細な説明】 この発明は、電源装置の負荷短絡保護装置に関
する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a load short-circuit protection device for a power supply device.

第1図に、この種の装置の従来例をブロツク図
で示す。図において、10は商用交流電源、20
はインバータ装置(定電圧定周波電源)であつ
て、1台もしくは複数台のインバータ(INV)
からなる。30は出力母線、40A及び40Bは
出力幹線であつて、夫々に短絡保護装置例えばサ
イリスタ式の短絡しや断器50A及び50Bが挿
入されている。51A及び51Bは電流検出器で
あつて、夫々出力幹線40A及び40Bに介装さ
れている。52Aはしや断指令器であつて、電流
検出器51Aの検出値がしや断レベルに達すると
オフ指令を短絡しや断器50Aに入力する。52
Bはしや断指令器であつて、電流検出器51Bの
検出値がしや断レベルに達するとオフ指令を短絡
しや断器50Bに入力する。60A,60A……
は配電線であつて夫々配電線しや断器70A,7
0A……を介して出力幹線40Aに接続されてい
る。60B,60B……配電線であつて、夫々配
電線しや断器70B,70B……を介して給電線
40Bに接続されている。
FIG. 1 shows a block diagram of a conventional example of this type of device. In the figure, 10 is a commercial AC power supply, 20
is an inverter device (constant voltage constant frequency power supply), which includes one or more inverters (INV)
Consisting of Reference numeral 30 represents an output bus, and 40A and 40B represent output main lines, into which short-circuit protection devices such as thyristor type short-circuit and disconnectors 50A and 50B are inserted, respectively. 51A and 51B are current detectors, which are interposed in the output main lines 40A and 40B, respectively. 52A is a short-circuit disconnection command device, which inputs an OFF command to the short-circuit disconnector 50A when the detected value of the current detector 51A reaches the short-circuit disconnection level. 52
B is a short-circuit disconnection command device, which inputs an OFF command to the short-circuit disconnector 50B when the detected value of the current detector 51B reaches the short-circuit disconnection level. 60A, 60A...
are distribution lines, and the distribution lines and disconnectors 70A and 7 are respectively
It is connected to the output main line 40A via 0A... 60B, 60B... are power distribution lines, and are connected to the power supply line 40B via power distribution lines and disconnectors 70B, 70B..., respectively.

次に、動作について説明する。 Next, the operation will be explained.

配電線60A,60A……,60B,60B…
…の各々に接続されている各負荷の健全時には、
短絡しや断器50A,50Bが共に閉路している
ので、インバータ装置20の電力は出力母線3
0、両出力幹線40A及び40Bを通して上記各
負荷に給電される。
Distribution line 60A, 60A..., 60B, 60B...
When each load connected to each of... is healthy,
Since the short-circuit and disconnectors 50A and 50B are both closed, the power of the inverter device 20 is transferred to the output bus 3.
0, and power is supplied to each of the above loads through both output main lines 40A and 40B.

今、配電線60A,60A……を通して給電さ
れている負荷の一つに第2図の時刻t1で短絡事故
が発生したものと仮定すると、出力幹線40Aを
通して短絡電流が流れるので、該出力幹線40A
を流れる電流の電流値が時刻t2でしや断レベルIs
を超え、しや断指令器52Aのオフ指令が短絡し
や断器50Aに供給されて該短絡しや断器50A
は即座に開絡し、出力幹線40A側の系統が出力
母線30から切離される。配電線60B,60B
……側に短絡事故が生じた場合も同様にして短絡
しや断器50Bが直ちに開絡し、出力幹線40B
側の系統が切離される。
Now, assuming that a short-circuit accident occurs at time t1 in Figure 2 in one of the loads that are being supplied with power through the distribution lines 60A, 60A, etc., a short-circuit current will flow through the output main line 40A, so the output main line 40A
The current value of the current flowing through reaches the shearing level Is at time t 2
exceeds the limit, the off command from the short-circuit disconnector 52A is supplied to the short-circuit disconnector 50A, and the short-circuit disconnector 50A is activated.
is immediately opened, and the system on the output main line 40A side is disconnected from the output bus 30. Distribution line 60B, 60B
. . . If a short circuit occurs on the side, the short circuit and disconnector 50B immediately open, and the output main line 40B
The side lineage is separated.

このようにして、インバータ装置20が短絡電
流に対して保護され、健全系統は短絡事故の影響
を受けることなくそのまゝ運転が継続されるが、
上記のように、負荷短絡が発生すると事故系統が
出力幹線から瞬時に切離されるので、負荷短絡が
発生した配電線の配電線しや断器がトリツプせ
ず、短絡配電線もしくは短絡点の発見に時間がか
かるという欠点があつた。
In this way, the inverter device 20 is protected against short-circuit current, and the healthy system continues to operate without being affected by the short-circuit accident.
As mentioned above, when a load short circuit occurs, the fault system is instantly disconnected from the output main line, so the distribution line or disconnector of the distribution line where the load short circuit occurred does not trip, and the shorted distribution line or short circuit point can be detected. The drawback was that it took time.

この発明は、上記した従来の欠点を除去する為
になされたもので、短絡保護装置を電流制御素子
で構成し、短絡事故発生時には出力幹線を流れる
短絡電流の波高値を抑制するだけで、出力幹線を
切離さない構成とすることによつて、短絡配電線
の選択的切離しを可能とし、電源装置の電圧垂下
動作を生ぜしめる恐れのない電源装置の負荷短絡
保護装置を提供することを目的とする。
This invention was made in order to eliminate the above-mentioned conventional drawbacks.The short-circuit protection device is configured with a current control element, and when a short-circuit accident occurs, the output voltage is reduced by simply suppressing the peak value of the short-circuit current flowing through the output main line. The purpose of the present invention is to provide a load short-circuit protection device for a power supply device that enables selective disconnection of short-circuited distribution lines by having a configuration in which the main line is not disconnected, and that does not cause voltage droop in the power supply device. do.

以下、この発明の一実施例を図について説明す
る。
An embodiment of the present invention will be described below with reference to the drawings.

第3図において、80A及び80Bは電流制御
素子であるパワートランジスタを用いて構成され
た短絡保護装置であつて、夫々出力幹線40A及
び40Bに挿入されている。90A及び90Bは
電流制御器であつて、夫々パワートランジスタ8
0A及び80Bのベースに制御信号を供給する。
電流制御器90A及び90Bは夫々電流検出器5
1A及び51Bの検出値を系統電流制限値Imに
相当する設定値と比較して、前者が後者より大に
なるとその出力が、自動制御され飽和する。10
0A及び100Bは電流設定器であつて電流制限
値Im(例えば、定格の150〜200%)に対応する上
記設定値を設定する。
In FIG. 3, 80A and 80B are short circuit protection devices constructed using power transistors as current control elements, and are inserted into output main lines 40A and 40B, respectively. 90A and 90B are current controllers, each of which has a power transistor 8.
Provides control signals to the bases of 0A and 80B.
Current controllers 90A and 90B are each current detector 5
The detected values of 1A and 51B are compared with a set value corresponding to the system current limit value Im, and when the former becomes larger than the latter, the output is automatically controlled and saturated. 10
0A and 100B are current setting devices that set the above-mentioned setting value corresponding to the current limit value Im (for example, 150 to 200% of the rating).

この構成においては、パワートランジスタ80
Aと80Bが常時導通している。今、第4図の時
刻t1で例えば、配電線60A,60A……の一の
負荷に短絡事故が発生したものと仮定すると、出
力幹線40Aを流れる電流が急増するが、その電
流値が電流制限値Imまで急増すると、電流制御
器90Aが出力する制御信号が、自動制御され飽
和するので、出力幹線40Aには波高値が電流制
限値Imに制限された短絡電流が流れる。このよ
うに短絡電流が流れ続けるので負荷短絡を生じて
いる配電線のしや断器70Aが時刻t3で選択的に
トリツプされ、短絡負荷が系統から切離される。
In this configuration, the power transistor 80
A and 80B are always electrically connected. Now, suppose that a short-circuit accident occurs in the load of one of the distribution lines 60A, 60A, . . . at time t 1 in Fig. When the current rapidly increases to the current limit value Im, the control signal output by the current controller 90A is automatically controlled and saturated, so that a short-circuit current whose peak value is limited to the current limit value Im flows through the output main line 40A. As the short-circuit current continues to flow in this manner, the distribution line disconnector 70A causing the load short-circuit is selectively tripped at time t3 , and the short-circuit load is disconnected from the grid.

上記短絡電流は波高値が他系統に影響を与えな
い大きさの電流制限値に抑制される上、さい断波
(例えば、位相制御された電流)ではなく一サイ
クルの全期間通流する電流である為、波高値/実
効値が小さいという利点がある。
The peak value of the above short-circuit current is suppressed to a current limit value that does not affect other systems, and it is not a cut wave (for example, a phase-controlled current) but a current that flows for the entire period of one cycle. Therefore, there is an advantage that the peak value/effective value is small.

なお、パワートランジスタ80A,80Bに代
えてインピーダンス可変素子を用いてもよい。
Note that variable impedance elements may be used in place of the power transistors 80A and 80B.

以上の如く、この発明によれば、短絡保護装置
をパワートランジスタで構成し、出力幹線と電源
装置を即座に切離すのではなく、短絡電流の波高
を抑えて流し続ける構成としたことによつて、負
荷短絡を生じている配電線のしや断器を選択的に
トリツプさせることができるので、当該配電線も
しくは短絡点を速やかに知ることができ、又電源
装置の電圧垂下動作を防ぐことができる。
As described above, according to the present invention, the short-circuit protection device is configured with a power transistor, and instead of immediately disconnecting the output main line and the power supply device, the short-circuit current is suppressed in wave height and continues to flow. Since it is possible to selectively trip the break or break in the distribution line that is causing the load short-circuit, it is possible to quickly identify the distribution line or short-circuit point, and to prevent voltage drooping of the power supply device. can.

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

第1図は従来の電源装置の負荷短絡保護装置の
回路図、第2図は波形タイムチヤート、第3図は
この発明による電源装置の負荷短絡保護装置の実
施例の回路図、第4図は上記実施例における短絡
電流の波形図である。 図において、20……電源装置、40A,40
B……出力幹線、51A,51B……電流検出
器、80A,80B……電流制御素子、90A,
90B……電流制御器、100A,100B……
設定器。なお、図中、同一符号は同一又は相当部
分を示す。
FIG. 1 is a circuit diagram of a conventional load short-circuit protection device for a power supply device, FIG. 2 is a waveform time chart, FIG. 3 is a circuit diagram of an embodiment of a load short-circuit protection device for a power supply device according to the present invention, and FIG. 4 is a circuit diagram of a conventional load short-circuit protection device for a power supply device. It is a waveform diagram of the short circuit current in the said Example. In the figure, 20...power supply device, 40A, 40
B...Output main line, 51A, 51B...Current detector, 80A, 80B...Current control element, 90A,
90B...Current controller, 100A, 100B...
Setting device. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

【特許請求の範囲】[Claims] 1 電源装置の出力幹線に設けられる短絡保護装
置が電流制御素子で構成されると共に上記出力幹
線に介装された電流検出器の出力が上記電流制御
素子の電流制御器に導かれ、該出力が上記電流制
御器に設定された電流制限値を超えると該電流制
御器の出力が飽和することを特徴とする電源装置
の負荷短絡保護装置。
1. A short-circuit protection device provided on the output main line of the power supply device is composed of a current control element, and the output of the current detector installed in the output main line is guided to the current controller of the current control element, and the output is A load short-circuit protection device for a power supply device, wherein the output of the current controller is saturated when the current limit value set in the current controller is exceeded.
JP57232575A 1982-12-27 1982-12-27 Load shortcircuit protecting device for power source Granted JPS59122323A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57232575A JPS59122323A (en) 1982-12-27 1982-12-27 Load shortcircuit protecting device for power source

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57232575A JPS59122323A (en) 1982-12-27 1982-12-27 Load shortcircuit protecting device for power source

Publications (2)

Publication Number Publication Date
JPS59122323A JPS59122323A (en) 1984-07-14
JPH0150302B2 true JPH0150302B2 (en) 1989-10-27

Family

ID=16941491

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57232575A Granted JPS59122323A (en) 1982-12-27 1982-12-27 Load shortcircuit protecting device for power source

Country Status (1)

Country Link
JP (1) JPS59122323A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62118761A (en) * 1985-11-14 1987-05-30 Meidensha Electric Mfg Co Ltd Semiconductor switch circuit

Also Published As

Publication number Publication date
JPS59122323A (en) 1984-07-14

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