JPH0538047A - Power source system - Google Patents
Power source systemInfo
- Publication number
- JPH0538047A JPH0538047A JP3184949A JP18494991A JPH0538047A JP H0538047 A JPH0538047 A JP H0538047A JP 3184949 A JP3184949 A JP 3184949A JP 18494991 A JP18494991 A JP 18494991A JP H0538047 A JPH0538047 A JP H0538047A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- supply system
- current
- voltage
- connection bus
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Direct Current Feeding And Distribution (AREA)
- Rectifiers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、交流電源に接続され
て直流出力電圧を電圧指令値に一致させる電圧調節手段
を備えた整流器を有する電源を少なくとも２系統備え、
各電源系の整流器出力側を接続する直流母線を設けた電
源システムに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises at least two power supplies having a rectifier connected to an AC power supply and having voltage adjusting means for matching a DC output voltage with a voltage command value.
The present invention relates to a power supply system provided with a DC bus connecting the rectifier output side of each power supply system.
【０００２】[0002]
【従来の技術】図６は２組の電源系を並列に接続して運
転する従来例を示した回路図である。２組のうちの一方
の第１電源系１０は、サイリスタ整流器１１、インバー
タ１２、平滑コンデンサ１３、電圧制御装置１４、及び
第１電流検出器１５で構成しており、交流電源２からの
交流をサイリスタ整流器１１で直流に整流した後、イン
バータ１２で再び交流に変換して負荷６に給電してい
る。他方の第２電源系２０もサイリスタ整流器２１、イ
ンバータ２２、平滑コンデンサ２３、電圧制御装置２
４、及び第２電流検出器２５で構成していて、交流電源
３からの交流を再び交流に変換して負荷６に給電する。
ここで第１電源系１０と第２電源系２０とを並列運転す
る場合は、両インバータ１２と２２の出力側を交流母線
５で接続すると共に、第１電源系１０の直流中間回路と
第２電源系２０の直流中間回路とを直流連結母線４で連
結する。ここでサイリスタ整流器１１は電圧制御装置１
４で定電圧制御されるが、同時に第１電流検出器１５に
よりサイリスタ整流器１１の出力電流が過大にならない
ように電流制限をかけている。電圧制御装置２４もサイ
リスタ整流器２１を同じように制御している。2. Description of the Related Art FIG. 6 is a circuit diagram showing a conventional example in which two sets of power supply systems are connected in parallel and operated. One of the two sets of the first power supply system 10 is composed of a thyristor rectifier 11, an inverter 12, a smoothing capacitor 13, a voltage control device 14, and a first current detector 15, and receives an alternating current from the alternating current power supply 2. After being rectified into a direct current by the thyristor rectifier 11, it is converted into an alternating current by the inverter 12 and supplied to the load 6. The other second power supply system 20 is also a thyristor rectifier 21, an inverter 22, a smoothing capacitor 23, and a voltage control device 2.
4 and the second current detector 25, converts the alternating current from the alternating current power source 3 into alternating current and supplies the load 6 with power.
Here, when the first power supply system 10 and the second power supply system 20 are operated in parallel, the output sides of both inverters 12 and 22 are connected by the AC bus 5, and the DC intermediate circuit of the first power supply system 10 and the second The DC intermediate circuit of the power supply system 20 is connected by the DC connecting bus bar 4. Here, the thyristor rectifier 11 is the voltage control device 1
Although the constant voltage control is performed at 4, the first current detector 15 simultaneously limits the current so that the output current of the thyristor rectifier 11 does not become excessive. The voltage control device 24 also controls the thyristor rectifier 21 in the same manner.
【０００３】図７は図６に示す従来例回路で使用してい
る電圧制御装置の構成を表した回路図であって、この電
圧制御装置１４では、電圧設定器141 が設定する電圧指
令値とサイリスタ整流器１１が出力する直流電圧とを、
それぞれ入力抵抗142 と入力抵抗143 とを介して偏差演
算器144 に与えている。電圧調節器145 はこの偏差演算
器144 が演算した偏差値を入力して、その入力偏差値を
零にする制御信号をサイリスタ整流器１１に出力するの
で、サイリスタ整流器１１の出力電圧は電圧設定器141
で設定した値を維持する。サイリスタ整流器２１も同様
である。FIG. 7 is a circuit diagram showing the configuration of a voltage control device used in the conventional circuit shown in FIG. 6. In this voltage control device 14, a voltage command value set by a voltage setting device 141 and a voltage command value are set. The DC voltage output from the thyristor rectifier 11 is
It is given to the deviation calculator 144 via the input resistance 142 and the input resistance 143, respectively. The voltage regulator 145 inputs the deviation value calculated by the deviation calculator 144 and outputs a control signal for making the input deviation value zero to the thyristor rectifier 11, so that the output voltage of the thyristor rectifier 11 is the voltage setter 141.
Maintain the value set in. The same applies to the thyristor rectifier 21.
【０００４】[0004]
【発明が解決しようとする課題】ところで、図７で既述
の電圧制御装置１４と２４とで制御されているサイリス
タ整流器１１と２１とを図６に図示のように並列接続し
て運転する場合に、例えばサイリスタ整流器１１の出力
電圧を指令する電圧設定器141 の設定値が、サイリスタ
整流器２１用の設定値よりも僅かに低いとすると、この
低い側の電圧調節器145 が絞られるので、サイリスタ整
流器１１は出力せず、インバータ１２とインバータ２２
とには他方、即ちサイリスタ整流器２１からのみ直流電
力を供給することになる。このような運転状態で、例え
ばサイリスタ整流器２１へ電力を供給している交流電源
３が停電したり、或いはサイリスタ整流器２１が故障し
て停止したりすると、それまで直流を出力していなかっ
た側のサイリスタ整流器１１の出力が立ち上がるまでの
期間は、直流連結母線４の電圧が変動するので、インバ
ータ１２とインバータ２２の出力が大きく変動し、甚だ
しい場合には停止してしまう不具合がある。そこで、平
滑コンデンサ１３と平滑コンデンサ２３を大容量にする
等の対策で上述の不具合を回避しようとするのである
が、そのために装置が大形化する不都合を生じてしま
う。By the way, when the thyristor rectifiers 11 and 21 controlled by the voltage controllers 14 and 24 described in FIG. 7 are connected in parallel as shown in FIG. 6, the operation is performed. For example, if the set value of the voltage setter 141 that commands the output voltage of the thyristor rectifier 11 is slightly lower than the set value for the thyristor rectifier 21, the voltage regulator 145 on the lower side is narrowed down, so the thyristor The rectifier 11 does not output, and the inverter 12 and the inverter 22
On the other hand, DC power is supplied only from the thyristor rectifier 21. In such an operating state, for example, if the AC power supply 3 that supplies power to the thyristor rectifier 21 fails, or if the thyristor rectifier 21 fails and stops, the side that has not output DC until then. During the period until the output of the thyristor rectifier 11 rises, the voltage of the DC connecting bus 4 changes, so that the outputs of the inverter 12 and the inverter 22 change greatly, and there is a problem that they stop when they are extremely large. Therefore, an attempt is made to avoid the above-mentioned problems by taking measures such as increasing the capacity of the smoothing capacitors 13 and 23, but this causes a problem that the device becomes large.
【０００５】そこでこの発明の目的は、複数の整流器を
並列運転する際に、整流器の出力に偏りを生じることな
く、常に平衡して運転出来るようにして、運転上の不都
合を解消すると共に、平滑コンデンサの容量を適正に保
つことにある。Therefore, an object of the present invention is to allow a plurality of rectifiers to be operated in parallel without being biased in the output of the rectifiers, so that the rectifiers can always be operated in a balanced manner, thereby eliminating inconveniences in operation and smoothing. It is to keep the capacity of the capacitor proper.
【０００６】[0006]
【課題を解決するための手段】上記の目的を達成するた
めにこの発明は、冒頭で述べた種類の電源システムにお
いて、各電源系に設けられ、前記直流連結母線に流れる
電流の大きさと方向とを検出する連結母線電流検出手段
と、各電源系に設けられて前記連結母線電流検出手段の
検出電流が与えられ、直流連結母線を介して直流電流が
一方の電源系へ他方の電源系から流入する際には一方の
電源系の整流器出力電圧を上昇させ、且つ直流電流が一
方の電源系から他方の電源系へ流出する際には一方の電
源系の整流器出力電圧を減少させる補正信号を一方の電
源系の電圧調節手段に与える補正信号回路と、を設け、
前記補正信号は、直流連結母線を介して直流電流が一方
の電源系へ他方の電源系から流入する際と直流連結母線
を介して直流電流が一方の電源系から他方の電源系へ流
出する際とで、検出電流の大きさが同じときには、同じ
大きさにしたことを特徴とする。In order to achieve the above-mentioned object, the present invention provides a power supply system of the type described at the beginning, in which the magnitude and direction of the current flowing through the DC connecting bus bar are provided in each power supply system. Is connected to each power supply system and the detection current of the connection bus current detection means is applied to the power supply system, and a DC current flows from one power supply system to the other power supply system via the DC connection bus bar. When increasing the rectifier output voltage of one power supply system, and when a DC current flows from one power supply system to the other power supply system, a correction signal for decreasing the rectifier output voltage of one power supply system is used. And a correction signal circuit provided to the voltage adjusting means of the power supply system of
The correction signal is used when a DC current flows from one power supply system to the other power supply system via the DC connection bus bar and when a DC current flows from one power supply system to the other power supply system via the DC connection bus bar. In addition, when the detected currents have the same magnitude, they have the same magnitude.
【０００７】上記の目的を達成するためにこの発明は、
更に、冒頭で述べた種類の電源システムにおいて、各電
源系に設けられ、前記直流連結母線に流れる電流の大き
さと方向とを検出する連結母線電流検出手段と、各電源
系に設けられて前記連結母線電流検出手段の検出電流が
与えられ、直流連結母線を介して直流電流が一方の電源
系へ他方の電源系から流入する際には一方の電源系の整
流器出力電圧を上昇させ、且つ直流電流が一方の電源系
から他方の電源系へ流出する際には一方の電源系の整流
器出力電圧を減少させる補正信号を一方の電源系の電圧
調節手段に与える補正信号回路と、を設け、前記補正信
号は、直流連結母線を介して直流電流が一方の電源系へ
他方の電源系から流入する際と直流連結母線を介して直
流電流が一方の電源系から他方の電源系へ流出する際と
では、検出電流の大きさが同じでも、異なった大きさに
したことを特徴とする。In order to achieve the above object, the present invention provides
Further, in the power supply system of the kind described at the beginning, a connection bus current detection means provided in each power supply system for detecting the magnitude and direction of the current flowing in the DC connection bus, and the connection provided in each power supply system. The rectifier output voltage of one power supply system is increased when a DC current flows from one power supply system to the other power supply system via the DC connection bus bar by the detection current of the bus current detection means, and And a correction signal circuit that supplies a correction signal for reducing the rectifier output voltage of one power supply system to the voltage adjusting means of one power supply system when the current flows from one power supply system to the other power supply system, Signals are generated when a DC current flows into one power supply system from the other power supply system via the DC connection bus and when a DC current flows from one power supply system to the other power supply system via the DC connection bus. Of the detection current Nor it is come the same, characterized in that the different sizes.
【０００８】[0008]
【作用】本発明では、両電源系の整流器出力側同士を連
結している直流連結母線に流れる電流の大きさと方向と
を連結母線電流検出手段で検出し、この電流が他方の電
源系から一方の電源系へ流入する方向の場合は、一方の
整流器出力電圧の方が他方のそれよりも低いことを意味
している。そこでこのような電流方向の時は一方の整流
器の出力電圧を上昇させるべく、この電流値に対応した
補正信号を電圧設定器の設定値に加算する補正信号回路
を設けるのであるが、この補正信号回路は他方の整流器
にとってはその出力電圧を下降させる作用をなすので、
両整流器の出力電圧の不平衡を是正することが出来る。According to the present invention, the magnitude and the direction of the current flowing through the DC connecting bus connecting the output sides of the rectifiers of both power supply systems are detected by the connecting bus current detecting means, and this current is output from one of the other power supply systems. In the direction of flowing into the power supply system of, it means that the output voltage of one rectifier is lower than that of the other. Therefore, in such a current direction, in order to increase the output voltage of one rectifier, a correction signal circuit for adding a correction signal corresponding to this current value to the set value of the voltage setter is provided. Since the circuit acts on the other rectifier to lower its output voltage,
Unbalanced output voltage of both rectifiers can be corrected.
【０００９】[0009]
【実施例】図１は本発明の第１実施例を表した回路図で
あるが、この図１に図示の交流電源２と３、直流連結母
線４、交流母線５、負荷６、サイリスタ整流器１１と２
１、インバータ１２と２２、平滑コンデンサ１３と２
３、第１電流検出器１５、及び第２電流検出器２５と
は、図６で既述の従来例回路のものと名称・用途・機能
は同じであるから、これらの説明は省略する。FIG. 1 is a circuit diagram showing a first embodiment of the present invention. The AC power supplies 2 and 3, the DC connecting bus 4, the AC bus 5, the load 6, the thyristor rectifier 11 shown in FIG. And 2
1, inverters 12 and 22, smoothing capacitors 13 and 2
Since the third current detector 15, the first current detector 15, and the second current detector 25 have the same names, uses, and functions as those of the conventional circuit described in FIG. 6, their description will be omitted.
【００１０】図１に示している第１実施例回路では第１
電源系３０の直流連結母線４に連結母線電流検出器３３
を設け、サイリスタ整流器１１を制御する電圧制御装置
３４へは、第１電流検出器１５からの電流制限用の検出
電流とサイリスタ整流器１１の出力電圧検出値と共に、
この連結母線電流検出器３３の検出電流を入力してい
る。サイリスタ整流器２１を制御する電圧制御装置４４
へも、同様に第２電流検出器２５の検出電流とサイリス
タ整流器２１の出力電圧検出値と共に、連結母線電流検
出器４３の検出電流を入力する。尚、連結母線電流検出
器３３、４３は直流連結母線４を流れる電流を検出する
が、自己の電源系から他方の電源系へ向かって流れる方
向の電流（流出方向の電流）を例えば正電流として出力
し、自己の電源系へ他方の電源系から向かって流れる電
流（流入方向の電流）を例えば負電流として出力する。In the circuit of the first embodiment shown in FIG.
Connected bus current detector 33 to DC connection bus 4 of power supply system 30
Is provided to the voltage control device 34 for controlling the thyristor rectifier 11, together with the detection current for current limitation from the first current detector 15 and the output voltage detection value of the thyristor rectifier 11,
The detection current of the connection bus current detector 33 is input. Voltage control device 44 for controlling the thyristor rectifier 21
Similarly, the detection current of the second current detector 25 and the output voltage detection value of the thyristor rectifier 21 as well as the detection current of the connection bus current detector 43 are input. Although the connection bus current detectors 33 and 43 detect the current flowing through the DC connection bus 4, the current flowing in the direction from its own power supply system to the other power supply system (current in the outflow direction) is, for example, a positive current. It outputs and outputs the current (current in the inflow direction) flowing from the other power supply system to its own power supply system as, for example, a negative current.
【００１１】図２は図１に図示の第１実施例回路に使用
している電圧制御装置の構成を表した回路図である。こ
の図２に図示の電圧制御装置３４における電圧設定器14
1 、入力抵抗142 と143 、偏差演算器144、及び電圧調
節器145 の名称・用途・機能は図７で既述のものと同じ
であるが、本発明では、連結母線電流検出器３３からの
電流検出値が補正信号回路としての入力抵抗341 を介し
て偏差演算器144 に補正信号として入力しているところ
が、図７で既述の従来例回路とは異なっている。例え
ば、第２電源系４０から直流連結母線４を通じて第１電
源系３０へ直流電流が流入するのは、第１電源系３０の
サイリスタ整流器１１の出力電圧が第２電源系４０のサ
イリスタ整流器２１のそれよりも低いからであり、その
時第１電源系３０においてはこの補正信号は電圧設定器
141 で設定している電圧指令値を上昇させるべく補正を
行う。それと同時に第２電源系４０においては直流連結
母線４を通じて電流が流出しているサイリスタ整流器２
１に対してその出力電圧を下降させる補正を行うので、
両サイリスタ整流器の出力電圧の不平衡を解消すること
が出来る。FIG. 2 is a circuit diagram showing the configuration of the voltage control device used in the first embodiment circuit shown in FIG. The voltage setting device 14 in the voltage controller 34 shown in FIG.
1, the input resistors 142 and 143, the deviation calculator 144, and the voltage regulator 145 have the same names, uses, and functions as those described in FIG. 7, but in the present invention, the connection bus current detector 33 The current detection value is input as a correction signal to the deviation calculator 144 via an input resistor 341 as a correction signal circuit, which is different from the conventional circuit described in FIG. For example, a DC current flows from the second power supply system 40 into the first power supply system 30 through the DC connection bus 4 because the output voltage of the thyristor rectifier 11 of the first power supply system 30 is the thyristor rectifier 21 of the second power supply system 40. This is because it is lower than that, and at this time, in the first power supply system 30, this correction signal is the voltage setting device.
Correct to increase the voltage command value set in 141. At the same time, in the second power system 40, the thyristor rectifier 2 in which current flows out through the DC connecting bus bar 4
Since the correction to lower the output voltage is performed for 1,
Unbalanced output voltage of both thyristor rectifiers can be eliminated.
【００１２】図３は本発明の第２実施例の主要部分を表
す回路図であり、サイリスタ整流器を制御する電圧制御
装置の構成を示す。この図３の電圧制御装置５４におい
ては、補正信号回路は第１抵抗541 と第２抵抗542 とダ
イオード543 とで構成している。第２抵抗542 とダイオ
ード543 との直列回路に第１抵抗541 を並列に接続する
が、その際ダイオード543 はその陽極を第１抵抗541 に
接続するように極性を定めている。しかして、直流母線
電流検出器３３が正電流を出力する際にはダイオード54
3 がオフ状態になることから第２抵抗542 は第１抵抗54
1 から切り離された状態となり、それ故直流母線電流検
出器３３の検出電流は第１抵抗541 のみを介して偏差演
算器144 に与えられることになる。一方直流母線電流検
出器３３が負電流を出力する際にはダイオード543 がオ
ン状態になることから、第２抵抗542 は第１抵抗541 に
並列接続された状態となり、直流母線電流検出器３３の
検出電流は第１抵抗541 と第２抵抗542 との並列接続を
介して偏差演算器144 に与えられることになる。従っ
て、偏差演算器144 に与えられる補正信号は、直流母線
電流検出器３３の検出電流の大きさが同じでも検出電流
の極性に応じて、異なった大きさとなる。FIG. 3 is a circuit diagram showing the main part of the second embodiment of the present invention, showing the configuration of a voltage control device for controlling a thyristor rectifier. In the voltage controller 54 of FIG. 3, the correction signal circuit is composed of a first resistor 541, a second resistor 542 and a diode 543. The first resistor 541 is connected in parallel to the series circuit of the second resistor 542 and the diode 543, and the polarity of the diode 543 is determined so that its anode is connected to the first resistor 541. Therefore, when the DC bus current detector 33 outputs a positive current, the diode 54
Since 3 is turned off, the second resistor 542 becomes the first resistor 54.
Therefore, the current detected by the DC bus current detector 33 is supplied to the deviation calculator 144 via only the first resistor 541. On the other hand, when the DC bus current detector 33 outputs a negative current, the diode 543 is turned on, so that the second resistor 542 is connected in parallel with the first resistor 541 and the DC bus current detector 33 The detected current is given to the deviation calculator 144 through the parallel connection of the first resistor 541 and the second resistor 542. Therefore, the correction signal supplied to the deviation calculator 144 has different magnitudes depending on the polarity of the sensed current even if the magnitude of the sensed current of the DC bus current detector 33 is the same.
【００１３】図４は本発明の第３実施例を表す回路図で
ある。この実施例回路は第１電源系３０及び第２電源系
４０の出力電圧を負荷６１及び負荷６２にそれぞれ個別
的に供給する点が図１に示した第１実施例回路とは相違
しているが、その他については図１の第１実施例回路と
同じである。FIG. 4 is a circuit diagram showing a third embodiment of the present invention. This embodiment circuit is different from the first embodiment circuit shown in FIG. 1 in that the output voltages of the first power supply system 30 and the second power supply system 40 are individually supplied to the load 61 and the load 62, respectively. However, the other points are the same as those of the first embodiment circuit of FIG.
【００１４】尚、図４においては、電圧制御装置として
図２に示している構成の電圧制御装置３４、４４を使用
するようにしているが、電圧制御装置としては図３に示
している構成の電圧制御装置５４を使用することも出来
る。In FIG. 4, the voltage control devices 34 and 44 having the configuration shown in FIG. 2 are used as the voltage control device, but the voltage control device having the configuration shown in FIG. 3 is used. The voltage controller 54 can also be used.
【００１５】図５は本発明の第４実施例を表す回路図で
ある。この実施例回路は、第１電源系３０と第２電源系
４０を整流器１１、２１及び電圧制御装置３４、４４と
で構成している点が図４に示した第３実施例回路とは相
違している。第１電源系３０及び第２電源系４０の出力
電圧は負荷６３と負荷６４とにそれぞれ個別的に供給さ
れるが、その他については図４の第３実施例回路と同じ
である。FIG. 5 is a circuit diagram showing a fourth embodiment of the present invention. This embodiment circuit is different from the third embodiment circuit shown in FIG. 4 in that the first power supply system 30 and the second power supply system 40 are composed of the rectifiers 11 and 21 and the voltage control devices 34 and 44. is doing. The output voltages of the first power supply system 30 and the second power supply system 40 are individually supplied to the load 63 and the load 64, but otherwise the same as in the third embodiment circuit of FIG.
【００１６】[0016]
【発明の効果】電源系の整流器出力側同士を直流連結母
線で接続して並列運転を行う場合は、各整流器の出力電
圧の僅かな差が原因で出力電流に偏りを発生し、それが
原因で種々の不都合を生じるのであるが、本発明によれ
ば、整流器出力側同士を連結している直流連結母線に流
れる電流の大きさと方向とを連結母線電流検出手段で検
出し、この値を、出力電圧が低い側の整流器へは電圧上
昇方向の補正信号として与え、出力電圧が高い側の整流
器へは電圧下降方向の補正信号として与えることで、整
流器出力の不平衡を修正するようにしているので、電源
系を並列運転する際にこの整流器出力電圧の不平衡に起
因する不具合を解消し、平滑コンデンサ容量の抑制、即
ち装置の大形化を阻止することが出来る。又直流連結母
線の検出電流の極性に応じて、整流器出力電圧を上昇方
向へ補正する際は大きく補正し、整流器出力電圧を下降
方向へ補正する際は小さく補正するような補正信号回路
を設けることで、整流器出力電圧の変動を抑制すること
が出来るので、電源系の出力電圧が大きく変動したり、
装置が停止したりする不都合を未然に防止出来る効果も
得られる。When the rectifier output sides of the power supply system are connected to each other by the DC connecting bus and the parallel operation is performed, a slight difference in the output voltage of each rectifier causes a bias in the output current, which is the cause. However, according to the present invention, the magnitude and the direction of the current flowing through the DC connecting bus connecting the rectifier output sides are detected by the connecting bus current detecting means, and this value is The rectifier on the low output voltage side is given as a correction signal in the rising voltage direction, and the rectifier on the high output voltage side is given as a correction signal in the falling voltage direction to correct the imbalance in the rectifier output. Therefore, when the power supply systems are operated in parallel, it is possible to eliminate the problem caused by the imbalance of the rectifier output voltage, and to suppress the smoothing capacitor capacity, that is, prevent the device from becoming large. Depending on the polarity of the detection current of the DC connection bus, a correction signal circuit should be provided to make a large correction when correcting the rectifier output voltage in the upward direction and a small correction when correcting the rectifier output voltage in the downward direction. Therefore, it is possible to suppress the fluctuation of the rectifier output voltage, so that the output voltage of the power supply system fluctuates greatly,
It is also possible to obtain the effect of preventing the inconvenience that the device is stopped.
【図１】本発明の第１実施例を表した回路図FIG. 1 is a circuit diagram showing a first embodiment of the present invention.
【図２】図１に図示の第１実施例回路に使用している電
圧制御装置の構成を表した回路図FIG. 2 is a circuit diagram showing a configuration of a voltage control device used in the first embodiment circuit shown in FIG.
【図３】本発明の第２実施例の要部を表した回路図FIG. 3 is a circuit diagram showing a main part of a second embodiment of the present invention.
【図４】本発明の第３実施例を表した回路図FIG. 4 is a circuit diagram showing a third embodiment of the present invention.
【図５】本発明の第４実施例を表した回路図FIG. 5 is a circuit diagram showing a fourth embodiment of the present invention.
【図６】２組のインバータ装置を並列に接続して運転す
る従来例を示した回路図FIG. 6 is a circuit diagram showing a conventional example in which two sets of inverter devices are connected in parallel and operated.
【図７】図６に示す従来例回路で使用している電圧制御
装置の構成を表した回路図7 is a circuit diagram showing the configuration of a voltage control device used in the conventional circuit shown in FIG.
４ 直流連結母線 ５ 交流母線 １０ 第１電源系 １１ サイリスタ整流器 １２ インバータ １３ 平滑コンデンサ １４ 電圧制御装置 １５ 第１電流検出器 ２０ 第２電源系 ２５ 第２電流検出器 ３０ 第１電源系 ３３ 連結母線電流検出器 ３４ 電圧制御装置 ４０ 第２電源系 ４３ 連結母線電流検出器 ４４ 電圧制御装置 ５４ 電圧制御装置 １４１ 電圧設定器 １４４ 偏差演算器 １４５ 電圧調節器 ３４１ 入力抵抗 ５４１ 第１抵抗 ５４２ 第２抵抗 ５４３ ダイオード 4 DC connection bus 5 AC bus 10 First power supply system 11 Thyristor rectifier 12 inverter 13 Smoothing capacitor 14 Voltage control device 15 First current detector 20 Second power supply system 25 Second current detector 30 First power system 33 Connected bus current detector 34 Voltage control device 40 Second power supply system 43 Connected bus current detector 44 Voltage control device 54 Voltage control device 141 voltage setting device 144 deviation calculator 145 voltage regulator 341 Input resistance 541 First resistance 542 Second resistance 543 diode
Claims (6)
指令値に一致させる電圧調節手段を備えた整流器を有す
る電源系を少なくとも２系統備え、各電源系の整流器出
力側を接続する直流連結母線を設けた電源システムにお
いて、 各電源系に設けられ、前記直流連結母線に流れる電流の
大きさと方向とを検出する連結母線電流検出手段と、 各電源系に設けられて前記連結母線電流検出手段の検出
電流が与えられ、直流連結母線を介して直流電流が一方
の電源系へ他方の電源系から流入する際には一方の電源
系の整流器出力電圧を上昇させ、且つ直流電流が一方の
電源系から他方の電源系へ流出する際には一方の電源系
の整流器出力電圧を減少させる補正信号を一方の電源系
の電圧調節手段に与える補正信号回路と、 を設け、前記補正信号は、直流連結母線を介して直流電
流が一方の電源系へ他方の電源系から流入する際と直流
連結母線を介して直流電流が一方の電源系から他方の電
源系へ流出する際とで、検出電流の大きさが同じときに
は、同じ大きさにしたことを特徴とする電源システム。1. A DC connection for connecting at least two power supply systems having a rectifier connected to an AC power supply and having a voltage adjusting means for matching an output DC voltage with a voltage command value, and connecting the rectifier output side of each power supply system. In a power supply system provided with a bus bar, a connection bus current detection unit provided in each power supply system for detecting the magnitude and direction of a current flowing in the DC connection bus bar, and the connection bus current detection unit provided in each power supply system When the DC current flows into the one power supply system from the other power supply system via the DC connecting bus, the rectifier output voltage of one power supply system is increased, and the DC current is supplied to the one power supply system. And a correction signal circuit that supplies a correction signal for reducing the rectifier output voltage of one power supply system to the voltage adjusting means of one power supply system when flowing out from the system to the other power supply system. Detected current when DC current flows from one power supply system to another power supply system via DC connection bus and when DC current flows from one power supply system to another power supply system via DC connection bus The power supply system is characterized in that when the sizes are the same, the sizes are the same.
指令値に一致させる電圧調節手段を備えた整流器を有す
る電源系を少なくとも２系統備え、各電源系の整流器出
力側を接続する直流連結母線を設けた電源システムにお
いて、 各電源系に設けられ、前記直流連結母線に流れる電流の
大きさと方向とを検出する連結母線電流検出手段と、 各電源系に設けられて前記連結母線電流検出手段の検出
電流が与えられ、直流連結母線を介して直流電流が一方
の電源系へ他方の電源系から流入する際には一方の電源
系の整流器出力電圧を上昇させ、且つ直流電流が一方の
電源系から他方の電源系へ流出する際には一方の電源系
の整流器出力電圧を減少させる補正信号を一方の電源系
の電圧調節手段に与える補正信号回路と、 を設け、前記補正信号は、直流連結母線を介して直流電
流が一方の電源系へ他方の電源系から流入する際と直流
連結母線を介して直流電流が一方の電源系から他方の電
源系へ流出する際とでは、検出電流の大きさが同じで
も、異なった大きさにしたことを特徴とする電源システ
ム。2. A DC connection for connecting at least two power supply systems having a rectifier connected to an AC power supply and having a voltage adjusting means for matching an output DC voltage with a voltage command value, and connecting the rectifier output side of each power supply system. In a power supply system provided with a bus bar, a connection bus current detection unit provided in each power supply system for detecting the magnitude and direction of a current flowing in the DC connection bus bar, and the connection bus current detection unit provided in each power supply system When the DC current flows into the one power supply system from the other power supply system via the DC connecting bus, the rectifier output voltage of one power supply system is increased, and the DC current is supplied to the one power supply system. And a correction signal circuit that supplies a correction signal for reducing the rectifier output voltage of one power supply system to the voltage adjusting means of one power supply system when flowing out from the system to the other power supply system. Detected current when DC current flows from one power supply system to another power supply system via DC connection bus and when DC current flows from one power supply system to another power supply system via DC connection bus The power supply system is characterized by different sizes, even if the sizes are the same.
指令値に一致させる電圧調節手段を備えた整流器とこの
整流器に直流中間回路を介して接続されたインバータと
から成る電源系を少なくとも２系統備え、各電源系の直
流中間回路を接続する直流連結母線を設けた電源システ
ムにおいて、 各電源系に設けられ、前記直流連結母線に流れる電流の
大きさと方向とを検出する連結母線電流検出手段と、 各電源系に設けられて前記連結母線電流検出手段の検出
電流が与えられ、直流連結母線を介して直流電流が一方
の電源系へ他方の電源系から流入する際には一方の電源
系の整流器出力電圧を上昇させ、且つ直流電流が一方の
電源系から他方の電源系へ流出する際には一方の電源系
の整流器出力電圧を減少させる補正信号を一方の電源系
の電圧調節手段に与える補正信号回路と、 を設け、前記補正信号は、直流連結母線を介して直流電
流が一方の電源系へ他方の電源系から流入する際と直流
連結母線を介して直流電流が一方の電源系から他方の電
源系へ流出する際とで、検出電流の大きさが同じときに
は、同じ大きさにしたことを特徴とする電源システム。3. A power supply system comprising at least two rectifiers connected to an AC power supply and having a voltage adjusting means for matching the output DC voltage with a voltage command value, and an inverter connected to the rectifier via a DC intermediate circuit. In a power supply system that includes a system and is provided with a DC connection bus bar that connects the DC intermediate circuits of each power supply system, a connection bus current detection unit that is provided in each power supply system and detects the magnitude and direction of the current flowing through the DC connection bus bar And a detection current of the connection bus current detection means provided in each power supply system, and one power supply system when a direct current flows from one power supply system to the other power supply system via the DC connection bus The rectifier output voltage of one power supply system is increased when a DC current flows from one power supply system to the other power supply system by increasing the rectifier output voltage of A correction signal circuit for giving the adjusting means, and the correction signal is such that when the direct current flows from one power supply system to the other power supply system via the direct current connecting bus bar, The power supply system is characterized in that when the magnitude of the detected current is the same when flowing from one power supply system to the other power supply system, the magnitude is the same.
指令値に一致させる電圧調節手段を備えた整流器とこの
整流器に直流中間回路を介して接続されたインバータと
から成る電源系を少なくとも２系統備え、各電源系の直
流中間回路を接続する直流連結母線を設けた電源システ
ムにおいて、 各電源系に設けられ、前記直流連結母線に流れる電流の
大きさと方向とを検出する連結母線電流検出手段と、 各電源系に設けられて前記連結母線電流検出手段の検出
電流が与えられ、直流連結母線を介して直流電流が一方
の電源系へ他方の電源系から流入する際には一方の電源
系の整流器出力電圧を上昇させ、且つ直流電流が一方の
電源系から他方の電源系へ流出する際には一方の電源系
の整流器出力電圧を減少させる補正信号を一方の電源系
の電圧調節手段に与える補正信号回路と、 を設け、前記補正信号は、直流連結母線を介して直流電
流が一方の電源系へ他方の電源系から流入する際と直流
連結母線を介して直流電流が一方の電源系から他方の電
源系へ流出する際とで、検出電流の大きさが同じでも、
異なった大きさにしたことを特徴とする電源システム。4. A power supply system comprising at least two rectifiers connected to an AC power supply and having a voltage adjusting means for matching the output DC voltage with a voltage command value, and an inverter connected to the rectifier via a DC intermediate circuit. In a power supply system that includes a system and is provided with a DC connection bus bar that connects the DC intermediate circuits of each power supply system, a connection bus current detection unit that is provided in each power supply system and detects the magnitude and direction of the current flowing through the DC connection bus bar And a detection current of the connection bus current detection means provided in each power supply system, and one power supply system when a direct current flows from one power supply system to the other power supply system via the DC connection bus The rectifier output voltage of one power supply system is increased when a DC current flows from one power supply system to the other power supply system by increasing the rectifier output voltage of A correction signal circuit for giving the adjusting means, and the correction signal is such that when the direct current flows from one power supply system to the other power supply system via the direct current connecting bus bar, Even when the magnitude of the detected current is the same when flowing from one power supply system to the other power supply system,
Power supply system characterized by having different sizes.
ステムにおいて、各電源系の出力側は並列接続されて共
通の負荷に給電することを特徴とする電源システム。5. The power supply system according to claim 1, wherein the output sides of the respective power supply systems are connected in parallel to feed a common load.
ステムにおいて、各電源系の出力側はそれぞれ個別の負
荷に接続されることを特徴とする電源システム。6. A power supply system according to claim 1, wherein the output side of each power supply system is connected to an individual load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3184949A JPH0538047A (en) | 1991-07-25 | 1991-07-25 | Power source system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3184949A JPH0538047A (en) | 1991-07-25 | 1991-07-25 | Power source system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0538047A true JPH0538047A (en) | 1993-02-12 |
Family
ID=16162177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3184949A Pending JPH0538047A (en) | 1991-07-25 | 1991-07-25 | Power source system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0538047A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2736766A1 (en) * | 1995-06-09 | 1997-01-17 | Mitsubishi Electric Corp | Rectifier control system with multiple rectifiers for supplying DC voltage to inverter |
| JP2008301653A (en) * | 2007-06-01 | 2008-12-11 | Fuji Electric Assets Management Co Ltd | Electric power generating system |
| JP2014161199A (en) * | 2013-01-24 | 2014-09-04 | Nec Corp | Power network system, power router and management device thereof, operation method, and operation program for power router |
| CN110165655A (en) * | 2019-06-04 | 2019-08-23 | 上海电器科学研究所（集团）有限公司 | A kind of DC power supply and machine-cut changing device |
-
1991
- 1991-07-25 JP JP3184949A patent/JPH0538047A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2736766A1 (en) * | 1995-06-09 | 1997-01-17 | Mitsubishi Electric Corp | Rectifier control system with multiple rectifiers for supplying DC voltage to inverter |
| US5796601A (en) * | 1995-06-09 | 1998-08-18 | Mitsubishi Denki Kabushiki Kaisha | Rectifier control system |
| CN1042991C (en) * | 1995-06-09 | 1999-04-14 | 三菱电机株式会社 | Rectifier control system |
| DE19620444B4 (en) | 1995-06-09 | 2019-07-25 | Mitsubishi Denki K.K. | Rectifier control system |
| JP2008301653A (en) * | 2007-06-01 | 2008-12-11 | Fuji Electric Assets Management Co Ltd | Electric power generating system |
| JP2014161199A (en) * | 2013-01-24 | 2014-09-04 | Nec Corp | Power network system, power router and management device thereof, operation method, and operation program for power router |
| CN110165655A (en) * | 2019-06-04 | 2019-08-23 | 上海电器科学研究所（集团）有限公司 | A kind of DC power supply and machine-cut changing device |
| CN110165655B (en) * | 2019-06-04 | 2024-01-30 | 上海电器科学研究所（集团）有限公司 | Direct-current power supply parallel operation switching device |
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