JPH0564548B2 - - Google Patents
Info
- Publication number
- JPH0564548B2 JPH0564548B2 JP58001931A JP193183A JPH0564548B2 JP H0564548 B2 JPH0564548 B2 JP H0564548B2 JP 58001931 A JP58001931 A JP 58001931A JP 193183 A JP193183 A JP 193183A JP H0564548 B2 JPH0564548 B2 JP H0564548B2
- Authority
- JP
- Japan
- Prior art keywords
- output
- circuit
- inverter
- output voltage
- monitoring circuit
- 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 - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
- H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
- H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Description
【発明の詳細な説明】
本発明は、複数台のインバータ装置を並列冗長
方式で運転して負荷に電力を供給する電源装置、
特に自動電圧制御動作の異常に対する保護回路に
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a power supply device that operates a plurality of inverter devices in a parallel redundant manner to supply power to a load;
In particular, it relates to a protection circuit for abnormalities in automatic voltage control operations.
例えば第１図に示すようにインバータ回路１を
自動電圧制御（AVR）部２により制御し、その
出力を交流フイルタ３及び交流スイツチ（サイリ
スタスイツチ）４を介して負荷に電力を供給する
インバータ装置A1，A2等を並列冗長方式で運転
して負荷（共通母線Ｂ）に電力を供給しているシ
ステムにおいて、一台のインバータ装置の自動電
圧制御系に故障が発生すると、交流フイルタ３に
より波形改善された後の交流電圧に変動が生じ
る。この電圧変動は計器用変圧器５によつて検出
され、重圧設定器６の設定値と比較されるフイー
ドバツク値になるとともに、出力電圧監視回路７
に付与される。このため、この出力電圧監視回路
７で異常ありと判定されると、交流スイツチ制御
回路８にオフ指令が付与され、交流スイツチ４が
オフとなる。 For example, as shown in FIG. 1, an inverter device A that controls an inverter circuit 1 by an automatic voltage control (AVR) section 2 and supplies power to the load via an AC filter 3 and an AC switch (thyristor switch) 4 with its output. In a system in which power is supplied to a load (common bus B) by operating inverters 1 , A, 2 , etc. in a parallel redundant system, if a failure occurs in the automatic voltage control system of one inverter, the AC filter 3 will change the waveform. Fluctuations occur in the AC voltage after the improvement. This voltage fluctuation is detected by the instrument transformer 5 and becomes a feedback value that is compared with the set value of the heavy pressure setting device 6.
granted to. Therefore, when the output voltage monitoring circuit 7 determines that there is an abnormality, an off command is given to the AC switch control circuit 8, and the AC switch 4 is turned off.
このように自動電圧制御系に故障が生じると、
それが出力電圧の変動、つまり過電圧または不足
電圧として共通母線Ｂにも現われるので、出力電
圧監視回路７の監視によつて検出され、交流スイ
ツチ４のオフといつた保護動作が行われるが、自
動電圧制御系に異常のない装置の出力電圧監視回
路も動作して、共倒れとなることがある。 When a failure occurs in the automatic voltage control system like this,
Since this also appears on the common bus B as a fluctuation in the output voltage, that is, an overvoltage or an undervoltage, it is detected by the monitoring of the output voltage monitoring circuit 7, and a protective action such as turning off the AC switch 4 is performed. The output voltage monitoring circuit of a device with no abnormality in the voltage control system may also operate, resulting in a failure.
本発明は上記の点を考慮してなされたもので、
各インバータ装置の自動電圧制御系の制御量の変
化を検出し、これを出力電圧監視回路の検出出力
と共に判定要素とすることにより、的確な保護動
作が期待できる並列冗長方式の電源装置を提供す
ることを目的とする。 The present invention has been made in consideration of the above points, and
To provide a parallel redundant type power supply device that can expect accurate protection operation by detecting changes in the control amount of an automatic voltage control system of each inverter device and using this as a determination element together with the detection output of an output voltage monitoring circuit. The purpose is to
以下、本発明を図示の実施例に基づいて詳細に
説明する。 Hereinafter, the present invention will be explained in detail based on illustrated embodiments.
第２図は本発明の一実施例を示すもので、１は
インバータ回路、２Ａは自動電圧制御（AVR）
系の電圧制御用増幅器、３は交流フイルタ、４は
交流スイツチ、５は計器用変圧器、６は電圧設定
器、７は出力電圧監視回路、８は交流スイツチ制
御回路、９は発振器、１０はこの発振器９の発振
出力に同期した三角波を発生する三角波発生回
路、１１はこの三角波発生回路１０の出力（三角
波）と前記電圧制御用増幅器２Ａの出力（制御
量）とを比較する比較器（変調器）、１２はこの
比較器１１の出力に応じたゲート信号を前記イン
バータ回路１に供給するゲート回路、１３は前記
電圧制御用増幅器２Ａの出力の増減を検出する制
御量変化監視回路、１４はこの制御量変化監視回
路１３の検出出力（AVR信号が出力電圧を上昇
させる方向または低下させる方向に変化している
ことを示す信号）と前記出力電圧監視回路７の検
出出力（過電圧信号または不足電圧信号）を受
け、両者の関係に基づいて異常装置を判定し、前
記交流スイツチ制御回路８にオフ指令を与える判
定回路である。 Figure 2 shows one embodiment of the present invention, where 1 is an inverter circuit, 2A is an automatic voltage control (AVR)
system voltage control amplifier, 3 is an AC filter, 4 is an AC switch, 5 is an instrument transformer, 6 is a voltage setting device, 7 is an output voltage monitoring circuit, 8 is an AC switch control circuit, 9 is an oscillator, 10 is an A triangular wave generating circuit 11 generates a triangular wave synchronized with the oscillation output of the oscillator 9, and a comparator (modulation) 11 compares the output (triangular wave) of the triangular wave generating circuit 10 with the output (control amount) of the voltage control amplifier 2A. 12 is a gate circuit that supplies the inverter circuit 1 with a gate signal corresponding to the output of the comparator 11; 13 is a control amount change monitoring circuit that detects an increase or decrease in the output of the voltage control amplifier 2A; 14 is a control amount change monitoring circuit; The detection output of the control amount change monitoring circuit 13 (a signal indicating that the AVR signal is changing in the direction of increasing or decreasing the output voltage) and the detection output of the output voltage monitoring circuit 7 (an overvoltage signal or an undervoltage signal) This is a determination circuit that receives a signal), determines an abnormal device based on the relationship between the two, and issues an off command to the AC switch control circuit 8.
即ち、この判定回路１４において、過電圧時に
は制御量が出力電圧を上昇させる方向に変化して
いることを示す信号と過電圧信号の論理積をと
り、その出力をオフ指令として交流スイツチ制御
回路８に付与する。また、不足電圧時には制御量
が出力電圧を低下させる方向に変化していること
を示す信号と不足電圧信号の論理積をとり、その
出力をオフ指令として交流スイツチ制御回路８に
付与する。 That is, in this judgment circuit 14, in the event of an overvoltage, a logical product of a signal indicating that the control amount is changing in the direction of increasing the output voltage and the overvoltage signal is taken, and the output is given to the AC switch control circuit 8 as an OFF command. do. In addition, at the time of undervoltage, the logical product of the undervoltage signal and the signal indicating that the control amount is changing in the direction of decreasing the output voltage is taken, and the output is given to the AC switch control circuit 8 as an off command.
なお、判定回路１４の出力をインバータ停止信
号としてもよい。 Note that the output of the determination circuit 14 may be used as an inverter stop signal.
前記制御量変化監視回路１３は第３図に示すよ
うに構成している。即ち、電圧制御用増幅器２Ａ
の出力（制御量）を微分回路１３で微分し、この
微分出力を比較器１３Ｂ，１３Ｃで設定器１３
Ｄ，１３Ｅの設定値と比較し、一方の比較器１３
Ｂの出力を出力電圧上昇方向の変化信号、他方の
比較器１３Ｃの出力を出力電圧低下方向の変化信
号としている。 The control amount change monitoring circuit 13 is constructed as shown in FIG. That is, the voltage control amplifier 2A
The output (control amount) of
D, 13E, and one comparator 13
The output of the comparator 13C is used as a change signal in the direction of increasing the output voltage, and the output of the other comparator 13C is used as a change signal in the direction of decreasing the output voltage.
このような構成とすると、AVR系に故障が生
じて出力電圧が変動した場合には、出力電圧監視
回路７により過電圧または不足電圧が検出される
一方、AVR系の制御量の変化が制御量変化監視
回路１３によつて検出され、共に判定回路１４に
付与される。 With this configuration, if a failure occurs in the AVR system and the output voltage fluctuates, the output voltage monitoring circuit 7 will detect overvoltage or undervoltage, and the change in the control amount of the AVR system will be detected by the output voltage monitoring circuit 7. It is detected by the monitoring circuit 13 and both are applied to the determination circuit 14.
例えば第４図に示すようにAVR信号が変化す
ると、比較器１１の出力パルス幅、つまりインバ
ータ回路１の通電幅αが変わるとともに、制御量
変化分が微分回路１３Ａの出力として現われる。
この変化分が第４図のように設定レベル（設定器
１３Ｄの設定値）l1を越えると比較器１３Ｂに出
力が生じ、これが制御量が出力電圧を上昇させる
方向に変化していることを示す信号として判定回
路１４に付与される。このとき、過電圧信号が判
定回路１４に付与されていると、その論理積条件
が成立し、制御回路８にオフ指令が出されて交流
スイツチ４がオフとなる。即ち、故障装置が切離
される。このため、健全装置の共倒れが防止さ
れ、電源装置としての信頼性が向上する。 For example, as shown in FIG. 4, when the AVR signal changes, the output pulse width of the comparator 11, that is, the energization width α of the inverter circuit 1 changes, and the control amount change appears as the output of the differentiating circuit 13A.
When this change exceeds the set level (set value of the setter 13D) l1 as shown in Fig. 4, an output is generated in the comparator 13B, which indicates that the controlled variable is changing in the direction of increasing the output voltage. It is applied to the determination circuit 14 as a signal indicating. At this time, if the overvoltage signal is applied to the determination circuit 14, the AND condition is satisfied, an off command is issued to the control circuit 8, and the AC switch 4 is turned off. That is, the failed device is disconnected. This prevents the healthy devices from collapsing together, improving the reliability of the power supply device.
以上のように本発明によれば、各インバータ装
置のAVR系の制御量の変化を監視し、その増減
分を出力電圧監視回路の検出出力と共に異常装置
の判定要素としたので、故障装置の判定が的確と
なり、適切な保護処理が期待できる。 As described above, according to the present invention, changes in the control amount of the AVR system of each inverter device are monitored, and the increase/decrease is used as a determining factor for an abnormal device together with the detection output of the output voltage monitoring circuit, so that a faulty device can be determined. will be accurate, and appropriate protection treatment can be expected.
第１図は従来の並列冗長方式の電源装置の一例
を示すブロツク図、第２図は本発明の一実施例を
示すブロツク図、第３図は同実施例における制御
量変化監視回路のブロツク図、第４図は動作説明
のための波形図である。
１……インバータ回路、２Ａ……電圧制御用増
幅器、３……交流フイルタ、４……交流スイツ
チ、６……電圧設定器、７……出力電圧監視回
路、８……交流スイツチ制御回路、１０……三角
波発生回路、１１……比較器、１２……ゲート回
路、１３……制御量変化監視回路、１４……判定
回路。
Fig. 1 is a block diagram showing an example of a conventional parallel redundant type power supply device, Fig. 2 is a block diagram showing an embodiment of the present invention, and Fig. 3 is a block diagram of a controlled variable change monitoring circuit in the same embodiment. , FIG. 4 is a waveform diagram for explaining the operation. DESCRIPTION OF SYMBOLS 1... Inverter circuit, 2A... Voltage control amplifier, 3... AC filter, 4... AC switch, 6... Voltage setting device, 7... Output voltage monitoring circuit, 8... AC switch control circuit, 10 ... Triangular wave generation circuit, 11 ... Comparator, 12 ... Gate circuit, 13 ... Controlled amount change monitoring circuit, 14 ... Judgment circuit.
Claims (1)
転して負荷に電力を供給する電源装置において、
各インバータ装置に設けられ、自己インバータの
出力電圧を監視する出力電圧監視回路と、各イン
バータ装置に設けられ、自己インバータの自動電
圧制御系の制御量の変化を検出する微分回路と、
この微分回路の出力が与えられ、この出力が設定
レベルを越えると出力を送出する比較器と、この
比較器の出力と前記出力電圧監視回路の過電圧ま
たは不足電圧出力とが与えられ、両者出力の論理
積が満足されたとき、交流サイリスタスイツチに
オフ指令を供給する判定回路とを備えてなる並列
冗長方式の電源装置。1. In a power supply device that operates multiple inverter devices in a parallel redundant manner to supply power to a load,
an output voltage monitoring circuit provided in each inverter device to monitor the output voltage of the self-inverter; a differential circuit provided in each inverter device to detect changes in the control amount of the automatic voltage control system of the self-inverter;
The output of this differentiating circuit is given, and a comparator that sends out the output when this output exceeds a set level, and the output of this comparator and the overvoltage or undervoltage output of the output voltage monitoring circuit are given, and both outputs are given. A parallel redundant type power supply device comprising a determination circuit that supplies an off command to an AC thyristor switch when a logical product is satisfied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58001931A JPS59127578A (en) | 1983-01-10 | 1983-01-10 | Parallel redundancy type power source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58001931A JPS59127578A (en) | 1983-01-10 | 1983-01-10 | Parallel redundancy type power source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59127578A JPS59127578A (en) | 1984-07-23 |
| JPH0564548B2 true JPH0564548B2 (en) | 1993-09-14 |
Family
ID=11515347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58001931A Granted JPS59127578A (en) | 1983-01-10 | 1983-01-10 | Parallel redundancy type power source |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59127578A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE50382T1 (en) * | 1984-10-03 | 1990-02-15 | Bbc Brown Boveri & Cie | FAULT PROTECTION METHOD AND CIRCUIT. |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5810949B2 (en) * | 1978-05-09 | 1983-02-28 | 山洋電気株式会社 | Parallel operation inverter power supply device |
-
1983
- 1983-01-10 JP JP58001931A patent/JPS59127578A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59127578A (en) | 1984-07-23 |
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