JPH0477549B2 - - Google Patents
Info
- Publication number
- JPH0477549B2 JPH0477549B2 JP59076518A JP7651884A JPH0477549B2 JP H0477549 B2 JPH0477549 B2 JP H0477549B2 JP 59076518 A JP59076518 A JP 59076518A JP 7651884 A JP7651884 A JP 7651884A JP H0477549 B2 JPH0477549 B2 JP H0477549B2
- Authority
- JP
- Japan
- Prior art keywords
- reactive power
- cycloconverter
- current
- phase advance
- cap
- 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
- 239000003990 capacitor Substances 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 7
- 230000003111 delayed effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 101000870345 Vasconcellea cundinamarcensis Cysteine proteinase 1 Proteins 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
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
- H02M5/00—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC
- H02M5/04—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters
- H02M5/22—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M5/25—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M5/27—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means for conversion of frequency
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Electrical Variables (AREA)
- Ac-Ac Conversion (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は負荷に可変電圧可変周波数の交流電力
を供給し、かつ、受電端の入力基本波力率を１に
制御できるようにした無効電力制御形サイクロコ
ンバータの起動方法に関する。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides reactive power control that supplies variable voltage, variable frequency AC power to a load and controls the input fundamental wave power factor at the receiving end to 1. This article concerns how to start up a cycloconverter.
第１図は従来の無効電力制御形サイクロコンバ
ータの構成図を示すものである。その主回路は３
相交流電源BUSにスイツチSW0とSW1を介して
各々に接続された循環電流制御式サイクロコンバ
ータCCと進相コンデンサCAP及び受電端の無効
電力検出用変成器PTS、変流器CTSで構成され
ている。又制御回路としては無効電力演算回路
VAR、無効電力制御回路、負荷電流制御回路、
位相制御回路を備えている。
FIG. 1 shows a configuration diagram of a conventional reactive power control type cycloconverter. Its main circuit is 3
It consists of a circulating current control type cycloconverter CC, a phase advance capacitor CAP, a reactive power detection transformer PTS at the receiving end, and a current transformer CTS, each connected to the phase AC power supply BUS via switches SW 0 and SW 1 . ing. Also, as a control circuit, a reactive power calculation circuit is used.
VAR, reactive power control circuit, load current control circuit,
Equipped with a phase control circuit.
以上のような構成からなる無効電力制御形サイ
クロコンバータの起動法及び制御法は次のように
行つていた。 The method of starting and controlling the reactive power controlled cycloconverter having the above configuration was performed as follows.
起動は始めにスイツチSW0を投入し、循環電流
制御式サイクロコンバータ本体を起動し、次にス
イツチSW1を投入し、進相コンデンサCAPを接
続する。この場合交流電源BUSは進相コンデン
サCAPに進み電流ICAPが流れるために進み無効電
力が生じる。 To start up, first turn on switch SW 0 to start up the circulating current control type cycloconverter, then turn on switch SW 1 and connect the phase advance capacitor CAP. In this case, the AC power supply BUS advances to the phase advance capacitor CAP, and current I CAP flows through it, leading to generation of reactive power.
無効電力の制御は進相コンデンサCAPの接続
と同時に生じる交流電源BUSの進み無効電力を
無効電力演算回路VARによつて検出される。そ
の無効電力検出値Ｑは比較器C1で無効電力指令
値Ｑ＊と比較され正の偏差ε1を出力する。（この
場合無効電力検出値Ｑは進み無効分を負とする。
又受電端の基本波力率を１するために無効電力指
令値Ｑ＊＝０で与えられる）
この偏差ε1は制御補償回路HQに入力し、その
制御補償回路HQは循環電流制御式サイクロコン
バータCCの循環電流指令値I0 ＊を出力する。こ
れによつて循環電流制御式サイクロコンバータ
CCには受電端の進み電流Isを打消し合うような
循環電流I0が流れる以上のように受端部の無効電
力の検出値Ｑに対応して循環電流指令値I0 ＊を制
御して与えることによつて受電端の基本波力率を
１に制御できる。 In controlling the reactive power, the reactive power calculating circuit VAR detects the leading reactive power of the AC power supply BUS, which is generated simultaneously with the connection of the phase leading capacitor CAP. The detected reactive power value Q is compared with the reactive power command value Q * by a comparator C1 , and a positive deviation ε1 is output. (In this case, the reactive power detection value Q is negative for the leading reactive portion.
In addition, in order to make the fundamental wave power factor at the receiving end 1, the reactive power command value Q * is given as = 0) This deviation ε 1 is input to the control compensation circuit HQ, and the control compensation circuit HQ is a circulating current controlled cycloconverter. Outputs CC circulating current command value I 0 * . This makes the circulating current controlled cycloconverter
A circulating current I 0 that cancels out the leading current Is at the receiving end flows through the CC. As described above, the circulating current command value I 0 * is controlled in response to the detected value Q of reactive power at the receiving end. By applying this, the fundamental wave power factor at the receiving end can be controlled to 1.
従来の無効電力制御形サイクロコンバータは受
電端の基本波力率を常に１に保つた状態で、負荷
に可変電圧可変周波数の交流電力を供給すること
ができるが、起動時に大きな問題点がある。 Conventional reactive power control type cycloconverters can supply variable voltage, variable frequency alternating current power to a load while keeping the fundamental wave power factor at the power receiving end at 1, but there is a big problem when starting up.
サイクロコンバータCCの受電端には進相コン
デンサCAPが接続されるが、その容量はサイク
ロコンバータCCの入力KVA容量と同等のものが
必要であり、進相コンデンサCAPの投入スイツ
チSW1を投入したとき、過大な電流が流れ込む問
題点がある。通常進相コンデンサCAPには上記
突流電流を抑制するために直流リアクトルを挿入
しているが、それでも定常電流（進み電流）の３
倍程度の突入電流はさけられないのが現状であ
る。この突流電流は交流電源BUSの電圧変動を
もたらし、同一系統に接続された他の電気機器に
種々の悪影響を与える。 A phase advance capacitor CAP is connected to the receiving end of the cycloconverter CC, but its capacity must be equivalent to the input KVA capacity of the cycloconverter CC. , there is a problem that excessive current flows. Normally, a DC reactor is inserted into the phase advance capacitor CAP to suppress the above rush current, but even so, the steady current (lead current)
Currently, an inrush current that is about twice as large cannot be avoided. This rush current causes voltage fluctuations of the AC power supply BUS, which has various adverse effects on other electrical devices connected to the same system.
また、第１図に循環電流指令値I0 ＊を出力する
制御補償回路HQは受電端の基本波力率を１にす
るため一般的に積分制御回路が用いられる。その
ために無効電力制御応答がさがる欠点があつた。 Further, the control compensation circuit HQ that outputs the circulating current command value I 0 * in FIG. 1 is generally an integral control circuit in order to set the fundamental wave power factor at the receiving end to 1. As a result, there was a drawback that the reactive power control response decreased.
本発明は以上に鑑みてなされたもので、無効電
力制御形サイクロコンバータの起動時、進相コン
デンサに過大な突流電流が流れないようにした無
効電力制御形サイクロコンバータの起動方法を提
供することを目的としている。
The present invention has been made in view of the above, and an object of the present invention is to provide a method for starting a reactive power controlled cycloconverter that prevents an excessive rush current from flowing into the phase advance capacitor when starting the reactive power controlled cycloconverter. The purpose is
本発明は起動時サイクロコンバータ本体を起動
した後、受電端に分割して接続した進相コンデン
サを順次投入し、入力基本波力率を１になるよう
に制御したものである。
In the present invention, after starting up the cycloconverter main body at startup, phase advance capacitors connected separately to the power receiving end are sequentially connected to control the input fundamental wave power factor to be 1.
第２図は本発明の無効電力制御形サイクロコン
バータの実施例を示す構成図である。第１図の従
来と異なる点は受電端に設けた進相コンデンサを
分割していることである。その分割数は４分割を
例として示したものである。他の記号は第１図に
準ずる。
FIG. 2 is a configuration diagram showing an embodiment of the reactive power control type cycloconverter of the present invention. The difference from the conventional method shown in FIG. 1 is that the phase advance capacitor provided at the power receiving end is divided. The number of divisions is shown as an example of four divisions. Other symbols are the same as in Figure 1.
第２図においてCAP1，CAP2，CAP3，CAP4
は分割された進相コンデンサで、投入スイツチ
SW1SW2，SW3，SW4を介して交流電源BUSに
接続されている。 In Figure 2, CAP 1 , CAP 2 , CAP 3 , CAP 4
is a divided phase advance capacitor, and the input switch
SW1 is connected to the AC power supply BUS via SW2 , SW3 , and SW4 .
次に本実施例の起動方法について説明する。 Next, the startup method of this embodiment will be explained.
始めにサイクロコンバータCC本体を起動する
ためにスイツチSW0を投入する。この場合負荷電
流指令値IL ＊＝０で、交流電源BUSを流れる電流
Is＝０とし、サイクロコンバータCCは循環電流
制御が可能な状態で待機させておく。（実際はサ
イクロコンバータの入力トランスTRは零ではな
い。）以上のような状態で、進相コンデンサ
CAP1，CAP2，CAP3，CAP4を順次投入スイツ
チに従つて投入すれば、無効電力演算回路VAR
は交流電源の進み無効電力を検出し、その検出値
Ｑに対応する循環電流指令値IL ＊をサイクロコン
バータCCに与える。サイクロコンバータCCは指
令値IO ＊に従つて交流電源BUSの進み電流Isを打
消すような循環電流Ioが流れて、進相コンデンサ
AP1，CAP2，CAP3，CAP4を投入毎に受電端の
基本波力率を１に制御する。以上のような一連の
動作を終了後負荷電流指令値IL ＊を与えて無効電
力制御形サイクロコンバータを定常の運転動作に
入る。 First, turn on switch SW 0 to start up the cycloconverter CC body. In this case, the load current command value I L * = 0, and the current flowing through the AC power supply BUS
Is=0, and the cycloconverter CC is kept on standby in a state where circulating current control is possible. (Actually, the input transformer T R of the cycloconverter is not zero.) In the above state, the phase advance capacitor
By sequentially turning on CAP 1 , CAP 2 , CAP 3 , and CAP 4 according to the turning on switch, the reactive power calculation circuit VAR
detects the leading reactive power of the AC power source, and provides a circulating current command value I L * corresponding to the detected value Q to the cycloconverter CC. In the cycloconverter CC, a circulating current Io that cancels the leading current Is of the AC power supply BUS flows according to the command value I O * , and the phase leading capacitor
The fundamental wave power factor at the receiving end is controlled to 1 every time AP 1 , CAP 2 , CAP 3 , and CAP 4 are turned on. After completing the series of operations described above, the load current command value I L * is given and the reactive power control type cycloconverter enters steady operation.
従来無効電力制御は受電端の無効電力Ｑを検出
し、その検出値に応じて循環電流指令値J0 ＊を制
御していた。 Conventionally, reactive power control detects the reactive power Q at the receiving end and controls the circulating current command value J 0 * according to the detected value.
この制御は受電端の基本波力率を１にするため
に積分制御（第２図で制御補償回路HQ）が一般
的に用いられる。そのために特に進相コンデンサ
の投入時、交流電源BUSを流れる電流Isを打消
すために与える循環電流指令値I0 ＊に遅れが生じ
て瞬時過大な電流が流れる。 In this control, integral control (control compensation circuit H Q in FIG. 2) is generally used to make the fundamental wave power factor at the receiving end 1. For this reason, especially when the phase advance capacitor is turned on, there is a delay in the circulating current command value I 0 * given to cancel the current Is flowing through the AC power supply BUS, and an excessive current flows instantaneously.
上記のような欠点をなくすことを目的としたの
が第３図の本発明の他の実施例である。本発明に
おける循環電流指令値I0 ＊は次のような方法によ
つて算出し、与えられる。 Another embodiment of the present invention shown in FIG. 3 is aimed at eliminating the above-mentioned drawbacks. The circulating current command value I 0 * in the present invention is calculated and given by the following method.
循環電流式サイクロコンバータCCの循環電流
I0は(1)式で表わすことができる。 Circulating current of circulating current type cycloconverter CC
I 0 can be expressed by equation (1).
I0＝（Ip＋IN−｜IL｜）／２ ………(1)
ここでIPは正群コンバータSSFの出力電流でIN
は負群コンバータSSNの出力電流、｜IL｜は負荷
電流の絶対値である。 I 0 = (Ip + I N − | I L |) / 2 ………(1) Here, I P is the output current of the positive group converter SSF and is
is the output current of the negative group converter SSN, and |I L | is the absolute value of the load current.
次に循環電流I0が流れている場合、入力無効電
流IREは(2)式で表わすことができる。ただし、
αN≒180−αP
IRE＝ISP・sinαP＋ISNsinαN≒（ISP
＋ISN）sinαP＝K1（IP＋IN）・sinαP
＝K1（２・I0＋｜IL｜）sinαP ………(2)
ここでISPは正群コンバータSSPの入力電流、
ISNは負群コンバータSSNの入力電流で、αP，αN
は正、負群コンバータの位相制御角で、K1はコ
ンバータの変換定数である。 Next, when the circulating current I 0 is flowing, the input reactive current I RE can be expressed by equation (2). However, αN≒180−α P I RE = I SP・sinα P +I SN sinα N ≒ (I SP + I SN ) sinα P = K 1 (I P + I N )・sinα P = K 1 (2・I 0 + |I L |) sinα P ………(2) Here, I SP is the input current of the positive group converter SSP,
I SN is the input current of negative group converter SSN, α P , α N
are the phase control angles of the positive and negative group converters, and K 1 is the conversion constant of the converter.
従つて入力基本波力率を１（Ｑ＝０）すなわち
進相コンデンサの進み電流ICAPと入力電流IREが等
しくなるように制御した時、循環電流I0は(3)式を
満足している。 Therefore, when the input fundamental wave power factor is controlled to be 1 (Q = 0), that is, the leading current I CAP of the phase advance capacitor and the input current I RE are equal, the circulating current I 0 satisfies equation (3). There is.
I0＝Icap−K1・｜IL｜・sinαP／２・K1・sinαP…
……(3)
ただしIRE＝Icap
以上のように(3)式に基づいて循環電流指令値I0
＊を与えれば受電端の基本力率は１に制御でき
る。 I 0 = Icap−K 1・｜I L ｜・sinα P /2・K 1・sinα P …
...(3) However, I RE = Icap As shown above, based on equation (3), the circulating current command value I 0
If * is given, the basic power factor at the receiving end can be controlled to 1.
第３図の実施例において、CT1，CT2，CT3，
CT4は分割された進相コンデンサCAP1，CAP2，
CAP3，CAP4の電流を検出する変流器で、その
検出値Icap1、Icap2、Icap3、Icap4は加算器Ａで
加算し、Icap＝Icap1＋Icap2＋Icap3＋Icap4を出
力する。 In the embodiment shown in FIG. 3, CT 1 , CT 2 , CT 3 ,
CT 4 is divided phase advance capacitor CAP 1 , CAP 2 ,
A current transformer that detects the current of CAP 3 and CAP 4. The detected values Icap 1 , Icap 2 , Icap 3 , and Icap 4 are added by adder A, and outputs Icap = Icap 1 + Icap 2 + Icap 3 + Icap 4. .
位相制御信号Vαは増幅回路GuでCOSαに変換
され、演算回路GTに入力する。この回路GTは√
１−COS2αを演算してSINαを出力する。一方負
荷電流ILは絶対値回路へ入力し、絶対値負荷電流
｜IL｜に変換され、SINαとともに乗算器MU1へ
入力する。乗算器MU1は｜IL｜・SINαを出力し、
増幅回路GYによつてK1倍される。この増幅回路
GYの出力値K1・｜IL｜・SINαは比較器C4で進相
コンデンサの電流Icapと比較する。（(3)式の分子
側を演算）
演算回路GTの出力値SINαは増幅回路GWで２・
K1倍されて比較器C4の出力値とともに割算器
DV1に入力する。この割算器DV1は(3)式に基づい
て循環電流指令値I0 ＊を出力する。 The phase control signal Vα is converted into COSα by the amplifier circuit Gu, and is input to the arithmetic circuit GT . This circuit G T is √
1-COS 2 α is calculated and SINα is output. On the other hand, the load current I L is input to the absolute value circuit, converted into an absolute value load current |I L |, and is input to the multiplier M U1 together with SINα. Multiplier M U1 outputs |I L |・SINα,
K is multiplied by 1 by the amplifier circuit G Y. This amplifier circuit
The output value K1 ·|I L |·SINα of G Y is compared with the current Icap of the phase advance capacitor by comparator C4 . (Calculate the numerator side of equation (3)) The output value SINα of the calculation circuit G T is calculated by the amplifier circuit G W by 2.
K is multiplied by 1 and comparator C is the divider along with the output value of 4
Input to DV 1 . This divider DV 1 outputs a circulating current command value I 0 * based on equation (3).
この構成による無効電力制御形サイクロコンバ
ータの起動方法は分割された進相コンデンサを
CAP1，CAP2，CAP3，CAP4を順次投入し、進
相コンデンサIcapに応じて循環電流指令値I0 ＊を
瞬時に演算して与えている。従つて進相コンデン
サ投入時の電流ICAPを打消すための循環電流I0を
流すことができる。すなわち、無効電力制御の応
答特性が良くなる。 The starting method for a reactive power controlled cycloconverter with this configuration is to use a divided phase advance capacitor.
CAP 1 , CAP 2 , CAP 3 , and CAP 4 are sequentially turned on, and the circulating current command value I 0 * is instantaneously calculated and given according to the phase advance capacitor Icap. Therefore, it is possible to flow a circulating current I 0 to cancel the current I CAP when the phase advance capacitor is turned on. That is, the response characteristics of reactive power control are improved.
本発明における無効電力制御形サイクロコンバ
ータの起動法は受電端に設けた進相コンデンサを
分割して設けて、順次投入することによつて従来
装置における起動時に流れる大きな突入電流とい
うものはなくなりきわめて円滑な起動が可能とな
る。
The starting method of the reactive power control type cycloconverter according to the present invention is to divide the phase advancing capacitor provided at the power receiving end and sequentially supply them, thereby eliminating the large inrush current that flows at the time of starting in conventional devices and resulting in extremely smooth operation. This allows for easy startup.
従つて交流電源系統に電圧変動等の悪影響を及
ぼすこともなくなり、理想的な電力変換装置を提
供することができる。 Therefore, there is no adverse effect such as voltage fluctuation on the AC power supply system, and an ideal power converter can be provided.
また、受電端の無効電力を検出するかわりに進
相コンデンサの電流を検出して循環電流指令値を
演算して与えることによつて無効電力の制御応答
を改善することができる。 Furthermore, instead of detecting the reactive power at the power receiving end, the current of the phase advancing capacitor is detected and the circulating current command value is calculated and given, thereby improving the reactive power control response.
第１図は従来の無効電力制御形サイクロコンバ
ータの構成図、第２図は本発明の一実施例を示す
無効電力制御形サイクロコンバータの構成図、第
３図は本発明の他の実施例を示す無効電力制御形
サイクロコンバータの構成図である。
BUS……３相交流電源、SW0……サイクロコ
ンバータのスイツチ、CAP，CAP1，CAP2，
CAP3，CAP4……進相コンデンサ、CC……サイ
クロコンバータ、SSP……正群コンバータ、
SSN……負群コンバータ、TR……入力トラン
ス、L01，L02……直流リアクトル、LOAD……負
荷、PTs……変成器、CTs，CT1，CT2，CT3，
CT4……変流器、VAR……無効電力演算回路、
HQ，GO，GL……制御補償回路、QR……無効電
力指令回路、PH−Ｐ，PH−Ｎ……正、負位相
制御回路、OA……反転回路、C1，C2，C3，C4…
…比較器、SW1，SW2，SW3，SW4……進相コン
デンサスイツチ、Ａ，A1，A2……加算器、ABS
……絶対値回路、GT……演算回路、GV，GY，GW
……増幅回路、Mu1……乗算器、DV1……割算
器。
Fig. 1 is a block diagram of a conventional reactive power control type cycloconverter, Fig. 2 is a block diagram of a reactive power control type cycloconverter showing one embodiment of the present invention, and Fig. 3 is a block diagram of another embodiment of the present invention. FIG. 2 is a configuration diagram of the reactive power control type cycloconverter shown in FIG. BUS...3-phase AC power supply, SW 0 ...cycloconverter switch, CAP, CAP 1 , CAP 2 ,
CAP 3 , CAP 4 ... Phase advance capacitor, CC ... Cyclo converter, SSP ... Positive group converter,
SSN...Negative group converter, TR...Input transformer, L01 , L02 ...DC reactor, LOAD...Load, PTs...Transformer, CTs, CT1 , CT2 , CT3 ,
CT 4 ...Current transformer, VAR...Reactive power calculation circuit,
H Q , G O , G L ... Control compensation circuit, QR ... Reactive power command circuit, PH-P, PH-N ... Positive and negative phase control circuit, OA ... Inverting circuit, C 1 , C 2 , C3 , C4 ...
... Comparator, SW 1 , SW 2 , SW 3 , SW 4 ... Phase advance capacitor switch, A, A 1 , A 2 ... Adder, ABS
... Absolute value circuit, G T ... Arithmetic circuit, G V , G Y , G W
...amplifier circuit, M u1 ...multiplier, DV 1 ...divider.
Claims (1)
のサイクロコンバータと、その入力側に接続した
進相コンデンサと、受電端の無効電力を検出し、
無効電力を制御する無効電力制御回路で構成され
前記サイクロコンバータの遅れ無効電力と前記進
相コンデンサの進み無効電力が互いに打消し合う
ように前記無効電力制御回路の出力を前記サイク
ロコンバータの循環電流指令値として与えて、循
環電流を制御する無効電力制御形サイクロコンバ
ータにおいて、前記進相コンデンサを分割して設
け、起動時サイクロコンバータ本体を起動し、し
かる後に分割された進相コンデンサを順次投入
し、入力基本波力率を常時１になるように制御す
ることを特徴とする無効電力制御形サイクロコン
バータの起動方法。1 A circulating current type cycloconverter that outputs variable frequency alternating current, a phase advance capacitor connected to its input side, and detects reactive power at the receiving end,
The reactive power control circuit includes a reactive power control circuit that controls reactive power, and the output of the reactive power control circuit is set to a circulating current command of the cycloconverter so that the delayed reactive power of the cycloconverter and the leading reactive power of the phase advance capacitor cancel each other out. In a reactive power control type cycloconverter that controls circulating current by giving a value as a value, the phase advance capacitor is provided in divided parts, the cycloconverter main body is started at startup, and then the divided phase advance capacitors are sequentially introduced, A method for starting a reactive power control type cycloconverter characterized by controlling the input fundamental wave power factor to always be 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59076518A JPS60223474A (en) | 1984-04-18 | 1984-04-18 | Starting method of reactive power control type cycloconverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59076518A JPS60223474A (en) | 1984-04-18 | 1984-04-18 | Starting method of reactive power control type cycloconverter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60223474A JPS60223474A (en) | 1985-11-07 |
| JPH0477549B2 true JPH0477549B2 (en) | 1992-12-08 |
Family
ID=13607494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59076518A Granted JPS60223474A (en) | 1984-04-18 | 1984-04-18 | Starting method of reactive power control type cycloconverter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60223474A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0753034B2 (en) * | 1984-11-16 | 1995-06-05 | 財団法人鉄道総合技術研究所 | Reactive power control type cyclo-converter device |
-
1984
- 1984-04-18 JP JP59076518A patent/JPS60223474A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60223474A (en) | 1985-11-07 |
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| EXPY | Cancellation because of completion of term |