JPH0421434B2 - - Google Patents

Info

Publication number
JPH0421434B2
JPH0421434B2 JP56194746A JP19474681A JPH0421434B2 JP H0421434 B2 JPH0421434 B2 JP H0421434B2 JP 56194746 A JP56194746 A JP 56194746A JP 19474681 A JP19474681 A JP 19474681A JP H0421434 B2 JPH0421434 B2 JP H0421434B2
Authority
JP
Japan
Prior art keywords
pole
current
converter
frequency
control
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
Application number
JP56194746A
Other languages
Japanese (ja)
Other versions
JPS5895988A (en
Inventor
Buichi Sakurai
Kyoshi Goto
Takami Sakai
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.)
Toshiba Corp
Tokyo Electric Power Co Holdings Inc
Original Assignee
Toshiba Corp
Tokyo Electric Power Co Inc
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 Toshiba Corp, Tokyo Electric Power Co Inc filed Critical Toshiba Corp
Priority to JP56194746A priority Critical patent/JPS5895988A/en
Publication of JPS5895988A publication Critical patent/JPS5895988A/en
Publication of JPH0421434B2 publication Critical patent/JPH0421434B2/ja
Granted legal-status Critical Current

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
    • H02M7/66—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal
    • H02M7/68—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters
    • H02M7/72—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/75—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal 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
    • H02M7/757—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal 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 using semiconductor devices only

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Protection Of Static Devices (AREA)
  • Direct Current Feeding And Distribution (AREA)
  • Inverter Devices (AREA)

Description

【発明の詳細な説明】 本発明は、特に発電機と直結した多極１回線又
は１極多回線直流送電システムにおける交直変換
装置の制御方式に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention particularly relates to a control system for an AC/DC converter in a multi-pole single-line or single-pole multi-line DC power transmission system directly connected to a generator.

第１図は、直流送電装置の概略構成図を示し、
交流母線１，１は変換用変圧器２，２′を介して、
例えば、多数個のサイリスタの直並列接続から成
る変換器３，３′に接続され、各サイリスタの点
弧位相を制御することにより交流を直流に又は直
流を交流に変換する。４，４′は平滑リアクトル、
５は直流送電線路、６，６′は計器用変圧器
（Ｐ・Ｔ）、７，７′は計器用変流器（Ｃ・Ｔ）を
示す。このような主回路構成における制御装置と
しては、定電流制御回路（ACR）８，８′及び定
電圧制御回路（AVR）９，９′はそれぞれ基準値
Idp、Edpと検出値Id、Edとの偏差を制御電圧Ec
に変換し、この制御電圧Ecは制御電圧選択回路
１０，１０′に入力される。前記制御電圧選択回
路１０，１０′は各種制御のうちで制御角を一番
進める制御系を自動的に選択するものであり、
こゝで選択された制御電圧Ecは、制御電圧リミ
ツタ回路１１，１１′で上限、下限のリミツタを
かけられ点弧位相制御回路１２，１２′に入力さ
れる。前記点弧位相制御回路１２，１２′は制御
電圧Ecに比例した点弧位相を決定してサイリス
タに点弧指令を出力する。このようにして構成さ
れた交直変換装置では、周知のごとく、電流マー
ジン（ΔI）の切替により一方が順変換装置とし
て定電流制御により運転され、他方が逆変換装置
として定電圧制御により運転される。 FIG. 1 shows a schematic configuration diagram of a DC power transmission device,
AC buses 1, 1 are connected via conversion transformers 2, 2',
For example, it is connected to a converter 3, 3' consisting of a large number of thyristors connected in series and parallel, and converts alternating current into direct current or vice versa by controlling the firing phase of each thyristor. 4, 4' are smooth reactors,
5 is a DC power transmission line, 6 and 6' are potential transformers (P/T), and 7 and 7' are potential current transformers (C/T). As a control device in such a main circuit configuration, constant current control circuits (ACR) 8, 8' and constant voltage control circuits (AVR) 9, 9' each have a reference value.
The deviation between Idp, Edp and the detected values Id, Ed is controlled by the voltage Ec.
This control voltage Ec is input to the control voltage selection circuits 10 and 10'. The control voltage selection circuits 10, 10' automatically select the control system that advances the control angle most among various types of control,
The control voltage Ec selected here is subjected to upper and lower limit limits by the control voltage limiter circuits 11, 11', and is inputted to the ignition phase control circuits 12, 12'. The ignition phase control circuits 12, 12' determine an ignition phase proportional to the control voltage Ec and output an ignition command to the thyristor. As is well known, in the AC/DC converter configured in this way, by switching the current margin (ΔI), one is operated as a forward converter under constant current control, and the other is operated as an inverse converter under constant voltage control. .

次に、第２図は、原子力発電と直結した双極１
回線の直流送電の主回路構成図を示す。第２図に
おいて、原子炉１３で発生した蒸気はタービン１
４へ送られ、そのタービン出力は発電機１５、昇
圧用変圧器１６を介して、交流母線１７に接続さ
れる。交流母線１７は、変換用変圧器１８，１９
を介して順変換器２０，２１に接続され、前記順
変換器２０，２１は原子力発電によつて得られた
交流電力を直流電力に変換し、前記変換された直
流電力は更に逆変換器２２，２３により交流電力
に変換され負荷に供給される。２４〜２７は平滑
リアクトル、２８，２９は本線、３０は中性線で
ある。 Next, Figure 2 shows bipolar 1 directly connected to nuclear power generation.
The main circuit configuration diagram for direct current power transmission is shown. In FIG. 2, the steam generated in the nuclear reactor 13 is transferred to the turbine 1
4, and its turbine output is connected to an AC bus 17 via a generator 15 and a step-up transformer 16. The AC bus 17 is connected to conversion transformers 18 and 19.
The forward converters 20 and 21 convert AC power obtained by nuclear power generation into DC power, and the converted DC power is further connected to an inverse converter 22. , 23, it is converted into AC power and supplied to the load. 24 to 27 are smooth reactors, 28 and 29 are main lines, and 30 is a neutral line.

又、３１は交流母線１７の周波数を検出する周
波数検出器、３２は、前記周波数検出器３１の出
力と周波数基準値（fo）により、周波数の偏差を
検出し、その周波数偏差が所定値以上のとき、そ
の偏差を出力する周波数偏差検出回路である。 Further, 31 is a frequency detector that detects the frequency of the AC bus 17, and 32 is a frequency detector that detects a frequency deviation based on the output of the frequency detector 31 and a frequency reference value (fo), and when the frequency deviation is greater than a predetermined value. This is a frequency deviation detection circuit that outputs the deviation when

尚、説明の便宜上、順変換器２０、本線２８、
逆変換器２２、中線３０で構成された極をP1極、
他の極をP2極と称す。 For convenience of explanation, the forward converter 20, the main line 28,
The pole composed of the inverter 22 and the median line 30 is P1 pole,
The other pole is called P2 pole.

さて、第２図における変換器の制御としては、
第１図で説明した通りである。即ち、第１図にお
ける制御装置が、第２図のP1極、P2極に対して
各々設置される。 Now, as for the control of the converter in Fig. 2,
This is as explained in FIG. That is, the control device shown in FIG. 1 is installed for each of the P 1 pole and P 2 pole of FIG. 2.

さて、このような構成において、いまP1極で
事故が発生したとする。当然のこととながら、
P1極はこの事故を検出して、順変換器２０、逆
変換器２２を停止する。しかしながら、この状態
のまゝ放置しておくと、原子力の発電々力と直流
送電々力とがアンバランスとなる為に、原子炉の
中性子束が増加して原子炉はスクラムに到る。従
つてこのような場合には、例えば制御棒を挿入し
て、すみやかに原子力の発電々力を減少させなけ
ればならないが、直流送電系の応答は、原子力系
の応答とは比較にならないほど高速である為に、
結果的には原子炉はスクラムに到る可能性が大き
い。それ故、このような場合を想定して、予め変
換器や直流送電線路などは、過負荷運転が可能で
あるように設計し、例えば上記のごとくP1極で
事故が発生した場合には、P1極の負荷をすみや
かにP2極に移して運転を継続する。即ち負荷移
行を行なう。 Now, suppose that in this configuration, an accident occurs at the P1 pole. Naturally,
The P1 pole detects this fault and stops the forward converter 20 and inverse converter 22. However, if this condition is left as it is, the neutron flux in the reactor will increase and the reactor will reach a scram due to an imbalance between nuclear power generation power and DC power transmission power. Therefore, in such a case, it is necessary to quickly reduce the power generated by nuclear power, for example by inserting control rods, but the response of a DC power transmission system is much faster than that of a nuclear power system. In order to be
As a result, there is a high possibility that the reactor will reach a scram. Therefore, assuming such a case, converters and DC transmission lines should be designed in advance so that overload operation is possible.For example, if an accident occurs at the P1 pole as shown above, Immediately transfer the load from P1 pole to P2 pole and continue operation. That is, load migration is performed.

さて、負荷移行を行なう場合には、順変換装置
側の定電流制御系の電流設定値を増加させればよ
い。注意すべき事は、逆変換装置側の電流設定値
を順変換装置より先に増加させてはならないこと
である。もし、逆変換装置側の電流設定値を先に
増加させると、逆変換装置では電流マージンがな
くなり、結果的に定電流制御系が動作して、直流
電圧を減少させる為に、直流電流は増加しても送
電々力は所望値まで増加しない。 Now, when performing a load shift, it is sufficient to increase the current setting value of the constant current control system on the forward conversion device side. What should be noted is that the current setting value on the inverse converter side must not be increased before the forward converter side. If the current setting value on the inverter side is increased first, there will be no current margin in the inverter, and as a result, the constant current control system will operate and the DC current will increase to decrease the DC voltage. However, the power transmission power does not increase to the desired value.

そこで、以上のことを念頭において、再び第２
図に戻つて負荷移行について考えてみる。いま、
第２図のP1極の逆変換器２２側で事故が発生し
たとする。するとその事故を検出してその検出信
号を通信回線を介して、順変換器２０側に伝送
し、順変換器２０、逆変換器２２を停止すると同
時に、P2極の順変換器２１の電流設定値を増加
させて負荷移行を行なえばよい。 Therefore, with the above in mind, we will again introduce the second
Let's go back to the diagram and think about load migration. now,
Assume that an accident occurs on the P1 pole inverter 22 side in FIG. Then, the accident is detected and the detection signal is transmitted to the forward converter 20 side via the communication line, and at the same time, the forward converter 20 and the inverse converter 22 are stopped, and at the same time, the current of the P 2- pole forward converter 21 is The load may be shifted by increasing the set value.

しかしながら、この方式では、高信頼度、高速
度の通信回線が必要不可欠であるが、近年このよ
うな高信頼度、高速度の通信回線は、立地難によ
り非常に困難である。 However, in this system, a highly reliable, high speed communication line is essential, but in recent years, such a highly reliable, high speed communication line has been extremely difficult to provide due to poor location.

従つて、通信回路に依存しないで、すみやかに
負荷移行を行なえる制御方式が要望されている。 Therefore, there is a need for a control system that can quickly shift the load without depending on the communication circuit.

従つて、本発明の目的は、このうよな要望を満
たすべくなされたものであつて、通信回線に依存
しないで、すみやかに負荷移行をなしとげること
ができる交直変換装置の制御方式を提供すること
にある。 Therefore, it is an object of the present invention to provide a control method for an AC/DC converter that can quickly perform load shifting without relying on communication lines, and is designed to meet these demands. It is in.

以下、図面を参照して本発明を説明する。 The present invention will be described below with reference to the drawings.

第３図は、本発明の一実施例を示す定電流制御
系の回路図である。第２図と同一要素は同一符号
で示す。第３図において、３３は加算器で、電流
設定値Idpと後述する周波数偏差検出回路３２の
出力を加算する加算部（図示せず）と、この加算
部の出力と電流検出値Idを減算する減算部（図示
せず）とからなり、通常は電流設定値Idpと電流
検出値Idが加えられ、定電流制御アンプ３４によ
り、定電流制御が行なわれている。もし、第２図
の交流母線１７の周波数が変動して、周波数偏差
が所定値を越えると、周波数偏差検出回路３２が
出力し、加算器３３に加えられ、結果的に電流設
定値Idpを増加又は減少させる。これは、周波数
偏差検出回路３２からの出力としては、系統周波
数が上昇でプラス極性の偏差が出力され、また系
統周波数の低下でマイナス極性の偏差が出力され
るからである。 FIG. 3 is a circuit diagram of a constant current control system showing an embodiment of the present invention. Elements that are the same as those in FIG. 2 are designated by the same reference numerals. In FIG. 3, numeral 33 is an adder, which includes an adder (not shown) that adds the current setting value Idp and the output of a frequency deviation detection circuit 32 (described later), and subtracts the output of this adder and the detected current value Id. Normally, a current setting value Idp and a current detection value Id are added, and a constant current control amplifier 34 performs constant current control. If the frequency of the AC bus 17 in FIG. 2 fluctuates and the frequency deviation exceeds a predetermined value, the frequency deviation detection circuit 32 outputs an output, which is added to the adder 33, resulting in an increase in the current setting value Idp. or decrease. This is because the frequency deviation detection circuit 32 outputs a positive polarity deviation when the system frequency increases, and a negative polarity deviation when the system frequency decreases.

このような構成において、前記と同様にP1極
の逆変換器２２側で事故が発生したとする。この
まゝ放置しておくと、P1極の送電々力は減少す
る。（事故の種類によつてはP1極の送電々力が増
加する場合も考えられるが、こゝでは減少と仮定
する。）すると、第２図における交流母線１７の
周波数が上昇し、その偏差は周波数検出器３１、
周波数偏差検出回路３２によつて検出され、加算
器３３に、電流設定値Idpと同極性で加えられる
ので、等価的に電流設定値が増加したことにな
り、健全極、即ちP2極の送電々力が増加し負荷
移行が行なわれる。 In such a configuration, it is assumed that an accident occurs on the P1 - pole inverter 22 side in the same manner as described above. If left as is, the power transmission power of P1 pole will decrease. (Depending on the type of accident, the transmission power of P1 pole may increase, but here it is assumed that it decreases.) Then, the frequency of AC bus 17 in Fig. 2 increases, and its deviation increases. is the frequency detector 31,
Since it is detected by the frequency deviation detection circuit 32 and added to the adder 33 with the same polarity as the current setting value Idp, this means that the current setting value has increased equivalently, and the power transmission of the healthy pole, that is, the P 2 pole. power increases and load transfer occurs.

第３図のような構成では、健全極のみならず事
故極、即ち、上記例ではP1極の電流設定値も増
加するが、P1極はいづれ停止させるので、上記
のような構成でも問題ない。しかしながら、もつ
とすぐれた負荷移行制御を行なわせようとするな
らば、第４図のような構成にすることにより実現
出来る。すなわち第４図において、３５は高感度
の不足電圧検出器、３６はワンシヨツト回路、３
７は反転素子、３８はアンド素子である。尚、第
４図の回路は当然のことながら、P1極、P2極と
もに設置されている。さてこのような構成におい
て、前記と同じくP1極の逆変換器２２側で事故
が発生したとする。 In the configuration shown in Figure 3, the current setting value of not only the healthy pole but also the faulty pole, that is, the P1 pole in the above example, increases, but since the P1 pole will eventually be stopped, there is no problem even with the above configuration. do not have. However, if it is desired to perform excellent load transfer control, it can be achieved by using a configuration as shown in FIG. That is, in FIG. 4, 35 is a highly sensitive undervoltage detector, 36 is a one-shot circuit, and 3 is a high-sensitivity undervoltage detector.
7 is an inverting element, and 38 is an AND element. Incidentally, in the circuit shown in FIG. 4, both P1 pole and P2 pole are installed. Now, suppose that in such a configuration, an accident occurs on the P 1 -pole inverter 22 side, as described above.

先ず、P1極については、事故発生に伴い直流
電圧や直流電流のじよう乱を招く為に、第４図に
おける不足電圧検出器３５が動作して、ワンシヨ
ツト回路３６、反転素子３７、アンド素子３８を
介して、周波数偏差検出回路３２の出力はロツク
され、電流設定値は一定のまゝである。しかるに
健全極側であるP2極では、直流電圧や直流電流
のじよう乱は発生しないので、周波数偏差検出回
路３２の出力はロツクされず、等価的に電流設定
値が増加して負荷移行が行なわれる。これによ
り、例えば第２図に示す原子炉１３のスクラムを
防止することができる。 First, regarding the P1 pole, since the occurrence of an accident causes disturbances in the DC voltage and DC current, the undervoltage detector 35 in FIG. Via 38, the output of frequency deviation detection circuit 32 is locked and the current set point remains constant. However, in the P2 pole, which is the healthy pole, no disturbance occurs in the DC voltage or DC current, so the output of the frequency deviation detection circuit 32 is not locked, and the current set value equivalently increases and load shift occurs. It is done. Thereby, for example, scram of the nuclear reactor 13 shown in FIG. 2 can be prevented.

ここで、一極多回線の交直変換装置における負
荷移行について説明する。この場合の主回路の一
例を第５図に示し、送電線L1，L2，L3の両端に
は、回路分離用しや断器CB１，CB１１，CB２，
CB２１，CB３，CB３１が各々が設けられ、こ
れらに変換器３，３′が接続され、また、電流検
出器CT１，CT２，CT３が各送電線Ｌ１，Ｌ２，
Ｌ３にそれぞれ配設されている。 Here, load shifting in a single-pole multi-line AC/DC converter will be explained. An example of the main circuit in this case is shown in FIG .
CB21, CB3, CB31 are provided respectively, converters 3, 3' are connected to these, and current detectors CT1, CT2, CT3 are connected to each power transmission line L1, L2,
They are respectively arranged in L3.

負荷移行は、第６図に示す制御回路で実施され
る。IL１，IL２，IL３は、各送電線Ｌ１，Ｌ２，
Ｌ３の電流検出器CT１，CT２，CT３で検出さ
れた電流値を示している。SW１はしや断器CB
１，CB１１のいずれかの開放により開放動作を
行う切換スイツチ、SW２は、しや断器CB２，
CB２１のいずれかの開放により開放動作を行う
切換スイツチ、SW３は、しや断器CB３，CB３
１のいずれかの開放により開放動作を行う切換ス
イツチである。Ｋ１，Ｋ２，Ｋ３は係数回路、
ICは電流制御系である。 Load shifting is performed by the control circuit shown in FIG. IL1, IL2, IL3 are each power transmission line L1, L2,
It shows the current values detected by current detectors CT1, CT2, and CT3 of L3. SW1 Hashiya disconnector CB
1. The changeover switch, SW2, which performs the opening operation by opening either CB11, is the breaker CB2,
The changeover switch, SW3, which performs the opening operation by opening either of CB21, is the breaker CB3, CB3.
This is a changeover switch that performs an opening operation when either one of the switches 1 and 1 is opened. K1, K2, K3 are coefficient circuits,
IC is a current control system.

このような構成のものにおいて、通常運転時に
は係数回路Ｋ１，Ｋ２，Ｋ３をそれぞれ1/3に設
定し、変換器３から出力される電流基準値を各電
流検出器CT１，CT２，CT３の各検出値IL１，
IL２，IL３の合成電流と比較し、電流制御系IC
に入力される。 In such a configuration, during normal operation, coefficient circuits K1, K2, and K3 are each set to 1/3, and the current reference value output from converter 3 is set to each detection value of each current detector CT1, CT2, and CT3. value IL1,
Compared with the combined current of IL2 and IL3, the current control system IC
is input.

いま、例えば送電線Ｌ１に事故が発生した場
合、しや断器CB１，CB１１が開放され、事故を
除去する操作とともに、制御回路においては切換
スイツチSW１が開放され、電流指令値は、2/3
の値が電流制御系に入力され、主回路電流は2/3
に減少された運転を行う。 Now, for example, if an accident occurs on the power transmission line L1, the cable breakers CB1 and CB11 are opened, and along with the operation to remove the accident, the changeover switch SW1 is opened in the control circuit, and the current command value is reduced to 2/3.
is input to the current control system, and the main circuit current is 2/3
Perform reduced driving.

次に、負荷移行動作を行う場合は、しや断器
CB１，CB１１が開放され、事故を除去する操作
とともに、切換スイツチSW１が開放されたこと
で係数回路Ｋ２，Ｋ３の値をそれぞれ1/3から1/2
に変更する。 Next, when performing load transfer operation,
CB1 and CB11 are opened, and along with the operation to remove the accident, the changeover switch SW1 is also opened, and the values of coefficient circuits K2 and K3 are changed from 1/3 to 1/2, respectively.
Change to

この操作を行うことにより、電流基準値は事故
前の設定値と同一となり、負荷移行される。前述
の係数回路の代りに、周波数補正信号で行つても
良いことはいうまでもない。 By performing this operation, the current reference value becomes the same as the set value before the accident, and the load is transferred. It goes without saying that a frequency correction signal may be used instead of the coefficient circuit described above.

以上説明したごとく、本発明によれば、順変換
器が接続される交流母線の周波数変化分が所定値
以上になつたとき、順変換器側の電流設定値を増
減させることにより、通信回線に依存しない、又
各極独立にハード構成が可能な高信頼の負荷移行
を行なうことができると云う著しい効果を有す
る。 As explained above, according to the present invention, when the frequency change of the AC bus to which the forward converter is connected exceeds a predetermined value, the current setting value on the forward converter side is increased or decreased. It has the remarkable effect of being able to perform highly reliable load migration that is independent of each other and that allows for independent hardware configuration of each pole.

尚、本発明の実施例は、双極１回線を例として
説明したが、順変換器２０、逆変換器２２が１個
ずつで、両変換器を接続する直流線路が２回線以
上の、いわゆる１極多回線であつても同様に実施
できる。 Although the embodiment of the present invention has been explained using a single bipolar line as an example, it is also possible to use a so-called single line with one forward converter 20, one inverse converter 22, and two or more DC lines connecting both converters. This can be implemented in the same way even if the number of lines is extremely large.

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

第１図は直流送電の概略図、第２図は双極１回
線の主回路構成図、第３図、第４図は本発明の一
実施例を示すブロツク図、第５図は本発明の他の
実施例の主回路を示すブロツク、第６図は第５図
の実施例の制御回路を示すブロツク図である。 １，１′……交流母線、２，２′……変換用変圧
器、３，３′……変換器、４，４′……平滑リアク
トル、５……直流送電線路、６，６′……計器用
変圧器、７，７′……計器用変流器、８，８′……
定電流制御回路、９，９′……定電圧制御回路、
１０，１０′……制御電圧選択回路、１１，１
１′……制御電圧リミツタ回路、１２，１２′……
点弧位相制御回路、１３……原子炉、１４……タ
ービン、１５……発電機、１６……昇圧用変圧
器、１７……交流母線、１８，１９……変換用変
圧器、２０，２１……順変換器、２２，２３……
逆変換器、２４〜２７……平滑リアクトル、２
８，２９……本線、３０……中性線、３１……周
波数検出器、３２……周波数偏差検出回路、３３
……加算器、３４……定電流制御アンプ、３５…
…不足電圧検出回路、３６……ワンシヨツト回
路、３７……反転素子、３８……アンド素子。 Fig. 1 is a schematic diagram of DC power transmission, Fig. 2 is a main circuit configuration diagram of a bipolar single line, Figs. FIG. 6 is a block diagram showing the main circuit of the embodiment of FIG. 5, and FIG. 6 is a block diagram showing the control circuit of the embodiment of FIG. 1, 1'... AC bus, 2, 2'... Conversion transformer, 3, 3'... Converter, 4, 4'... Smoothing reactor, 5... DC transmission line, 6, 6'... ...Instrument transformer, 7,7'...Instrument current transformer, 8,8'...
constant current control circuit, 9,9'... constant voltage control circuit,
10, 10'... Control voltage selection circuit, 11, 1
1'... Control voltage limiter circuit, 12, 12'...
Ignition phase control circuit, 13... Nuclear reactor, 14... Turbine, 15... Generator, 16... Step-up transformer, 17... AC bus, 18, 19... Conversion transformer, 20, 21 ...Forward converter, 22, 23...
Inverse converter, 24-27...Smoothing reactor, 2
8, 29... Main line, 30... Neutral line, 31... Frequency detector, 32... Frequency deviation detection circuit, 33
...Adder, 34...Constant current control amplifier, 35...
... Undervoltage detection circuit, 36... One shot circuit, 37... Inverting element, 38... AND element.

Claims (1)

【特許請求の範囲】 １ 各々、定電流制御系を有した順変換器および
定電圧制御系あるいは定余裕角制御系を有した逆
変換器により構成された多極１回線又は１極多回
線の交直変換装置において、 前記順変換器が接続される交流母線の周波数の
変化分を検出する周波数検出器を設け、 前記周波数の変化分が所定値以上になつたと
き、その変化分に応じて健全極側の前記順変換器
の定電流制御系の電流設定値を増減させることを
特徴とする交直変換装置の制御方式。[Scope of Claims] 1. A multi-pole, single-line or single-pole, multi-line system each constructed of a forward converter having a constant current control system and an inverse converter having a constant voltage control system or a constant margin angle control system. The AC/DC converter is provided with a frequency detector that detects a change in the frequency of the AC bus to which the forward converter is connected, and when the change in frequency exceeds a predetermined value, the system detects a sound state according to the change. A control method for an AC/DC converter, characterized in that the current setting value of a constant current control system of the forward converter on a pole side is increased or decreased.
JP56194746A 1981-12-03 1981-12-03 Control system for ac/dc converter Granted JPS5895988A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56194746A JPS5895988A (en) 1981-12-03 1981-12-03 Control system for ac/dc converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56194746A JPS5895988A (en) 1981-12-03 1981-12-03 Control system for ac/dc converter

Publications (2)

Publication Number Publication Date
JPS5895988A JPS5895988A (en) 1983-06-07
JPH0421434B2 true JPH0421434B2 (en) 1992-04-10

Family

ID=16329534

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56194746A Granted JPS5895988A (en) 1981-12-03 1981-12-03 Control system for ac/dc converter

Country Status (1)

Country Link
JP (1) JPS5895988A (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56112828A (en) * 1980-02-12 1981-09-05 Tokyo Electric Power Co Accdc interlocking system control system

Also Published As

Publication number Publication date
JPS5895988A (en) 1983-06-07

Similar Documents

Publication Publication Date Title
JPH0421434B2 (en)
CA1262257A (en) Method and system for operating power converter system
JPH1028319A (en) Protection device for series compensation system
EP0760177B1 (en) Recovery of transmitted power in an installation for transmission of high-voltage direct current
EP0067620B1 (en) Secondary arc extinction device
JP3480123B2 (en) Compensation method for reactive power etc. of power supply system with power generation equipment
CN108725216B (en) Balanced power supply system and method based on Scott wiring traction transformer
JP2773808B2 (en) Earthing transformer protection relay
JP2801770B2 (en) Monitoring circuit of AC / DC converter
JP3162586B2 (en) Control device of AC / DC converter
US4608626A (en) Electrical inverter with minority pole current limiting
JPS61164423A (en) Method of detecting trouble of direct current wire
JPS649817B2 (en)
JPH0368620B2 (en)
JPH05207650A (en) Controller for dc transmission system
JP2791006B2 (en) Control method of AC / DC converter
JPS64908B2 (en)
JPH04265632A (en) Load unbalance eliminating device for uninterruptible power supply
JPH04295228A (en) Protective unit for ac/dc converter
JPS5846836A (en) Network protector
JPS6336212B2 (en)
JPH0130370B2 (en)
JP2001095156A (en) Power distribution system
JPH0213530B2 (en)
JPS602028A (en) Voltage variation suppressing device