JPS5926177B2 - Reactive power control method for AC systems including DC parts - Google Patents
Reactive power control method for AC systems including DC partsInfo
- Publication number
- JPS5926177B2 JPS5926177B2 JP52015206A JP1520677A JPS5926177B2 JP S5926177 B2 JPS5926177 B2 JP S5926177B2 JP 52015206 A JP52015206 A JP 52015206A JP 1520677 A JP1520677 A JP 1520677A JP S5926177 B2 JPS5926177 B2 JP S5926177B2
- Authority
- JP
- Japan
- Prior art keywords
- reactive power
- power
- control method
- power control
- converter
- 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
Links
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Electrical Variables (AREA)
Description
【発明の詳細な説明】
本発明は直流部分を含む交流系統の無効電力制御方式に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reactive power control system for an AC system including a DC portion.
一般に、直流送電系統には無効電力を調整すべく調相設
備が設けられており、この設備(電力コンデンサ、分路
リアクトル)を自動的に操作して無効電力を適正範囲内
に維持している。Generally, DC power transmission systems are equipped with phase adjustment equipment to adjust reactive power, and this equipment (power capacitors, shunt reactors) is automatically operated to maintain reactive power within an appropriate range. .
これは、変換装置が発生する無効電力を調相機器で吸収
し、送電負荷による電力損失の低減を図るためである。
直流送電系統において、順変換装置が正常に動作するた
めには、交流側でみれば電圧より電流が遅れて流れる必
要があり、これは一種の遅れ無効分をとる負荷である。
そして、交流電力を直流電力に変換する量が多ければ多
い程遅れ無効分が必要となり、これを補償しないと交流
電圧が低下し0てしまい、所要有効電力を逆変換装置に
送り込むことができない。また逆変換装置を正常に動作
させるためには、出力側の負の交流電圧に対して電流を
進ませて流す必要がある。This is because the reactive power generated by the converter is absorbed by the phase adjusting device to reduce power loss due to the power transmission load.
In a DC power transmission system, in order for a forward converter to operate normally, current must flow with a lag behind voltage on the AC side, and this is a type of load that takes a delayed reactive component.
The more AC power is converted into DC power, the more a delay reactive component is required, and if this is not compensated for, the AC voltage will drop to 0, making it impossible to send the required active power to the inverter. Further, in order to operate the inverter normally, it is necessary to advance the current with respect to the negative alternating current voltage on the output side.
正の交流電圧に対しては遅れ電流5である。したがつて
逆変換装置は、遅れ電流を必要とする機器であり、これ
を補償しないと交流電圧が低下し希望する電力を送り出
すことはできない。このように順、逆変換装置はともに
遅れ無効電フカを必要とするから、交流系統を電圧降下
させないために進相無効電力を供給して補償する無効電
力制御装置が設置されている。For a positive alternating current voltage, the delay current is 5. Therefore, the inverter is a device that requires a delayed current, and unless this is compensated for, the AC voltage will drop and the desired power cannot be sent out. Since both forward and inverse converters require lagging reactive power, a reactive power control device is installed to compensate by supplying phase-advanced reactive power in order to prevent a voltage drop in the AC system.
第1図は直流部分を含む送電系統の一例としての周波数
変換所の系統を示している。FIG. 1 shows a frequency conversion station system as an example of a power transmission system including a DC portion.
この系統に)おいて、50H2母線と60H2母線とは
、しや断器1、電圧可変形変圧器2および変換器3をそ
れぞれ2組づつ用いてなる周波数変換系統により連繋さ
れており、変換器3相互間が直流部分である。そして、
サイリスタ変換器3は3相ブリッジ結線″で構成され、
変換器の制御はバルブに与えるゲート信号の位相を制御
する位相制御である。基本的な制御方式は順変換器(整
流器)側で定電力制御、あるいは定電流制御、逆変換器
(インバータ)側で定余裕角制御である。第2図に制御
回路ブロック図を示す。変換装置の消費無効電力は次の
計算式より求められる。In this system), the 50H2 bus bar and the 60H2 bus bar are connected by a frequency conversion system that uses two sets each of a breaker 1, a variable voltage transformer 2, and a converter 3. The area between the three is the DC part. and,
The thyristor converter 3 is configured with a three-phase bridge connection.
The control of the converter is phase control that controls the phase of the gate signal applied to the valve. The basic control method is constant power control or constant current control on the forward converter (rectifier) side, and constant margin angle control on the inverse converter (inverter) side. FIG. 2 shows a control circuit block diagram. The reactive power consumption of the converter is calculated using the following formula.
Q−Pdtanθ(MVar) ・・・・・
・・・・(1)Q:消費無効電力Pd:変換電力
α:制御角
u:重り角
P:整流相数
Id:直流電流
X:転流リアクタンス
EdO:無制御時の直流電圧
順・逆変換装置の遅れの所要無効電力はバルブの制御角
に比例し直流電力に対する無効電力の必要な割合は順変
換器で30〜50%逆変換器で40〜60%である。Q-Pdtanθ (MVar)...
(1) Q: Reactive power consumption Pd: Converted power α: Control angle u: Weight angle P: Number of rectification phases Id: DC current X: Commutation reactance EdO: Direct/inverse conversion of DC voltage when not controlled The required reactive power for the delay of the device is proportional to the control angle of the valve, and the required ratio of reactive power to DC power is 30-50% for a forward converter and 40-60% for an inverse converter.
普通、直流系は大容量の交流系と連系されるので最大所
要無効電力の60(F6全部を補償するための進相無効
電力供給装置を必要としない。Normally, the DC system is connected to a large-capacity AC system, so there is no need for a phase-advanced reactive power supply device to compensate for all 60 (F6) of the maximum required reactive power.
一般に30%は交流系統から供給され、残りの30(L
を無効電力供給装置から供給している。従米の無効電力
制御装置は変換装置で消費する無効電力の大きさを検出
し、基準値と比較して調相設備に操作指令を与える制御
方式である。Generally, 30% is supplied from the AC system, and the remaining 30% (L
is supplied from a reactive power supply device. Jubei's reactive power control device is a control method that detects the amount of reactive power consumed by the converter, compares it with a reference value, and issues operating commands to the phase adjustment equipment.
第3図は無効電力制御プロツク図であり、無効電力検出
回路は無効電力量を直流電圧に変換している。無効電力
レベル検出回路は実系統の無効電力を各種の設定された
レベルの無効電力と比較してどのレベルにあるかを判別
している。操作指令判別回路は無効電力レベル検出回路
によつて検出されたレベルの信号を受け、それに応じて
調相機器へ操作信号を出す。等頻度匍脚回路は電力用コ
ンデンサSc、分路リアクトルShRの操作指令をどの
機器に与えるかを,判別し送出する回路で、等頻度制御
となるように考慮されている。しかしながら、このよう
に無効電力の検出値に基いて調相設備を制御するのでは
、検出のための回路構成が必要であるとか、動作の応答
遅れがある等の難点がある。FIG. 3 is a reactive power control block diagram, in which the reactive power detection circuit converts the amount of reactive power into a DC voltage. The reactive power level detection circuit compares the reactive power of the actual system with various set levels of reactive power to determine which level it is at. The operation command discrimination circuit receives a level signal detected by the reactive power level detection circuit, and outputs an operation signal to the phase adjusting device in accordance with the signal. The equal frequency leg circuit is a circuit that determines and sends out operating commands for the power capacitor Sc and shunt reactor ShR to which equipment, and is designed to provide equal frequency control. However, controlling the phase adjustment equipment based on the detected value of reactive power in this way has drawbacks such as the need for a circuit configuration for detection and a delay in operational response.
本発明は上述の点に鑑みてなされたもので、実系統の無
効電力を検出せずに調相設備を制御する無効電力制御方
式の提供を目的とする。The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a reactive power control method that controls phase adjustment equipment without detecting reactive power in an actual system.
この目的達成のため、本発明では、交直相互間ノの変換
装置の電力設定値に応じて調相設備を制御する無効電力
制御方式を構成したものである。To achieve this objective, the present invention provides a reactive power control method that controls phase adjustment equipment according to the power setting value of the AC/DC converter.
以下第4図を参照して本発明の一実施例を説明する。第
4図は本発明の制御回路を示すプロツク線図である。An embodiment of the present invention will be described below with reference to FIG. FIG. 4 is a block diagram showing the control circuit of the present invention.
すなわちサイリスタ変換器制御回路に与えられる電力設
定値信号Pdpを取出し、無効電力制御装置に与える。
この無効電力制御装置は、所要無効電力検出回路、操作
指令判別回路、電力コンデンサScおよび分路リアクト
ルShR等頻度制御回路からなり、電力コンデンサSc
および分路リアクトルShRに対し、入、切指令を与え
る。ここにおいて、サイリスタ変換器の消費無効電力は
前記1式によつて求められ、α、uは平常運転時は略々
一定であるから次式で求めることができる。That is, the power setting value signal Pdp given to the thyristor converter control circuit is taken out and given to the reactive power control device.
This reactive power control device consists of a required reactive power detection circuit, an operation command discrimination circuit, a power capacitor Sc, a shunt reactor ShR, etc. frequency control circuit, and a power capacitor Sc.
and gives ON/OFF commands to shunt reactor ShR. Here, the reactive power consumption of the thyristor converter is determined by the above equation 1, and since α and u are approximately constant during normal operation, it can be determined by the following equation.
すなわち、Q−K1・Pd・・・・・・・・・(2)(
K1=Tanθ)
である。That is, Q-K1・Pd・・・・・・・・・(2)(
K1=Tanθ).
そして変換電力Pdは電力設定値Pdpと略々等しい。
また、Pd−Ed−1dであるから次式のように表わす
ことができる。QキK1・Pdp=K1・Id−Ed
+K1・Idp−Ed=K2・Idp・・・・・・・・
・(3)(K2−K1・Ed)である。The converted power Pd is approximately equal to the power setting value Pdp.
Also, since it is Pd-Ed-1d, it can be expressed as the following equation. QkiK1・Pdp=K1・Id−Ed +K1・Idp−Ed=K2・Idp・・・・・・・・・
・(3)(K2-K1・Ed).
したがつてQはPdpまたはIdpによつて求められ、
実際の無効電力を検出しなくても変換装置の電力設定値
Pdpまたは電流設定値Idpによる無効電力制御が行
える。本発明は上述のように、サイリスタ変換装置の電
力設定値等によつて調相装置を制御するようにしたため
、無効電力検出装置とかそれに関連する回路等が不要に
なり、装置構成が簡単である。Therefore, Q is determined by Pdp or Idp,
Reactive power control can be performed using the power set value Pdp or current set value Idp of the conversion device without detecting actual reactive power. As described above, in the present invention, the phase adjustment device is controlled by the power setting value of the thyristor conversion device, so that a reactive power detection device and related circuits are not required, and the device configuration is simple. .
また、検出に伴う応答遅れがないため、制御性が改善さ
れる。Furthermore, since there is no response delay associated with detection, controllability is improved.
第1図は周波数変換所の系統構成を示す図、第2図は直
流部分を含む送電系統に用いるサイリスタ変換器の制御
回路を示すプロツク線図、第3図は従来の無効電力制御
装置の構成を示すプロツク線図、第4図は本発明におけ
る無効電力制御装置のプロツク線図である。
1・・・・・化や断器、2・・・・・・変圧器、3・・
・・・・サイリスタ変換器。Figure 1 is a diagram showing the system configuration of a frequency converter station, Figure 2 is a block diagram showing the control circuit of a thyristor converter used in a power transmission system including a DC section, and Figure 3 is the configuration of a conventional reactive power control device. FIG. 4 is a block diagram of the reactive power control device according to the present invention. 1... Switching or disconnection, 2... Transformer, 3...
...Thyristor converter.
Claims (1)
換して送電する系統に対し調相設備から供給する無効電
力を制御する方式において、前記電力変換装置の電力設
定値又は電流設定値に対する無効電力を予定の関係式で
対応させておき、入力された電力設定値又は電流設定値
に対応する無効電力を検出する所要無効電力検出回路と
、この所要無効電力検出回路の出力信号を受け、この出
力信号の大きさに応じて調相機器への操作信号を出力す
る操作信号を出力する操作指令判別回路とから無効電力
制御装置を構成したことを特徴とする直流部分を含む交
流系統の無効電力制御方式。1. In a method of controlling reactive power supplied from a phase modifier to a system that converts power obtained from an AC system into DC and then converts it into AC and transmits the power, a method that controls reactive power supplied from a phase adjustment equipment The required reactive power detection circuit detects the reactive power corresponding to the input power set value or current set value, and receives the output signal of this required reactive power detection circuit. Reactive power in an AC system including a DC part, characterized in that a reactive power control device is configured from an operation command discrimination circuit that outputs an operation signal that outputs an operation signal to a phase modifier according to the magnitude of an output signal. control method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52015206A JPS5926177B2 (en) | 1977-02-15 | 1977-02-15 | Reactive power control method for AC systems including DC parts |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52015206A JPS5926177B2 (en) | 1977-02-15 | 1977-02-15 | Reactive power control method for AC systems including DC parts |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS53100451A JPS53100451A (en) | 1978-09-01 |
JPS5926177B2 true JPS5926177B2 (en) | 1984-06-25 |
Family
ID=11882385
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52015206A Expired JPS5926177B2 (en) | 1977-02-15 | 1977-02-15 | Reactive power control method for AC systems including DC parts |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5926177B2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5851321A (en) * | 1981-09-22 | 1983-03-26 | Kansai Electric Power Co Inc:The | Reactive power controller of alternate current and direct current converter |
JPS58203527A (en) * | 1982-05-21 | 1983-11-28 | Kansai Electric Power Co Inc:The | Method for controlling voltage and reactive electric power in ac/dc parallel transmission system |
JPS603729A (en) * | 1983-06-21 | 1985-01-10 | Mitsubishi Electric Corp | Reactive power controller |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51121754A (en) * | 1975-04-18 | 1976-10-25 | Hitachi Ltd | Flicker controller |
-
1977
- 1977-02-15 JP JP52015206A patent/JPS5926177B2/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51121754A (en) * | 1975-04-18 | 1976-10-25 | Hitachi Ltd | Flicker controller |
Also Published As
Publication number | Publication date |
---|---|
JPS53100451A (en) | 1978-09-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5798633A (en) | Battery energy storage power conditioning system | |
US6295215B1 (en) | AC power supply apparatus with economy mode and methods of operation thereof | |
CA1260533A (en) | Control for bumpless transfer of an ac motor between solid state inverter and a supply means | |
JP2002538587A (en) | Resonant frequency induction furnace system using capacitive voltage division | |
CN110061529B (en) | Smooth switching control method of flexible multi-state switch | |
EP0707368B1 (en) | Method and device for control of a series-compensated converter station | |
CA1233509A (en) | Twelve pulse ac motor drive | |
JPH0720957A (en) | Self-excited reactive power compensating device | |
US4649466A (en) | Method and circuit arrangemeant for operating a high voltage direct current line between two alternating voltage systems | |
EP0213877B1 (en) | Control device for power converter apparatus | |
JPS5926177B2 (en) | Reactive power control method for AC systems including DC parts | |
CN111404188A (en) | Direct-current power control method for fixing transformation ratio of converter | |
JPS6233802B2 (en) | ||
CN113300369B (en) | Loop line operation method based on power electronic transformer distribution network | |
CN113765128A (en) | High-voltage direct-hanging energy storage converter | |
JP3075578B2 (en) | Reactive power compensator | |
CN219659438U (en) | Inverter rectification dynamic parallel regulating device | |
US4884181A (en) | Method and arrangement for controlling a high voltage d-c transmission system | |
CN118100327B (en) | Electric net drilling energy balance control device and working method thereof | |
CN113852071B (en) | Direct-current side loop closing control method based on flexible loop closing device of double-voltage source type converter | |
JP2000245066A (en) | Control equipment of dc power transmission system | |
JPS6362984B2 (en) | ||
CN111371102A (en) | Method for coordinated control of phase modulator and static reactive power compensation equipment of converter station | |
JP2606946Y2 (en) | Control device for voltage fluctuation suppression device | |
JPS6148724B2 (en) |