JPH0576279B2 - - Google Patents
Info
- Publication number
- JPH0576279B2 JPH0576279B2 JP61078131A JP7813186A JPH0576279B2 JP H0576279 B2 JPH0576279 B2 JP H0576279B2 JP 61078131 A JP61078131 A JP 61078131A JP 7813186 A JP7813186 A JP 7813186A JP H0576279 B2 JPH0576279 B2 JP H0576279B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- excitation
- output
- power
- secondary winding
- 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
- 230000005284 excitation Effects 0.000 claims description 33
- 238000004804 winding Methods 0.000 claims description 27
- 238000010248 power generation Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000005086 pumping Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- 230000001052 transient effect Effects 0.000 description 4
- 230000010363 phase shift Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Eletrric Generators (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、２次励磁付の誘導機により任意の回
転数で運転できる可変速揚水発電システムの運転
制御方式に係り、特に発電及び揚水運転時に無効
電力の制御指令が与えられた場合に、有効電力及
び無効電力の変動を小さくおさえる方式に関す
る。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an operation control method for a variable speed pumped storage power generation system that can be operated at any rotational speed using an induction machine with secondary excitation, and is particularly applicable to The present invention relates to a method for suppressing fluctuations in active power and reactive power when a reactive power control command is given.
従来の揚水発電システムは揚水時に負荷の調整
ができないこと、及び、発電運転及び揚水運転時
に系統より要求される発電力の変化ならびに揚水
時の揚程の変化等により、システムの効率が変化
するという欠点があつた。
Conventional pumped storage power generation systems have the disadvantage that the load cannot be adjusted during pumping, and the efficiency of the system changes due to changes in the power required by the grid during power generation and pumping operations, and changes in the head during pumping. It was hot.
このため、発電力、揚程にかかわらず、上記シ
ステムを最高効率で運転させるための研究が進め
られている。上記目的を達成するため、従来は同
期機であつた揚水発電機を２次励磁付の誘導機と
して運転する、いわゆる可変速揚水発電システム
とすることにより、発電力、揚程にかかわらず、
システムの最高効率で運転が可能であるとの観点
より、これを実現するための研究が進められてい
る。このようなシステムに関しては、昭和59年電
気学会全国大会論文No.553「大容量同期電動機の可
変速運転特性」があるが、具体的制御方式につい
ては、ふられていない。 For this reason, research is underway to operate the above system at maximum efficiency, regardless of power generation or lift. In order to achieve the above objective, by using a so-called variable speed pumped storage power generation system in which the pumped storage power generator, which was conventionally a synchronous machine, is operated as an induction machine with secondary excitation, regardless of power generation capacity or pumping height,
From the viewpoint of enabling the system to operate at maximum efficiency, research is underway to achieve this. Regarding such a system, there is Paper No. 553 of the 1981 National Conference of the Institute of Electrical Engineers of Japan, ``Variable Speed Operating Characteristics of Large Capacity Synchronous Motors,'' but no specific control method is mentioned.
本発明の目的は、発電及び揚水の各運転状態に
おいて、無効電力の制御指令が与えられた場合
に、有効電力の変動を小さくおさえるに有効な可
変速機の運転制御方式を提供することにある。
An object of the present invention is to provide an operation control method for a variable speed machine that is effective in suppressing fluctuations in active power when a reactive power control command is given in each operating state of power generation and water pumping. .
本願は、可変速機に無効電力の制御指令を与え
た場合に有効電力の過渡的な変動を小さくおさえ
るように制御しようとするものである。すなわ
ち、従来のシステムでは、有効電力の制御指令に
より２次励磁電圧の位相角を、無効電力の制御指
令により２次励磁電圧の絶対値を制御していた。
このため、無効電力の制御指令により、過渡的に
有効電力が変動していた。この変動幅を小さくす
るため、無効電力の制御指令により、励磁電圧の
位相角も同時に制御しようとするものである。
The present application attempts to perform control so as to suppress transient fluctuations in active power to a small level when a reactive power control command is given to a variable speed machine. That is, in the conventional system, the phase angle of the secondary excitation voltage was controlled by the active power control command, and the absolute value of the secondary excitation voltage was controlled by the reactive power control command.
Therefore, the active power fluctuates transiently due to the reactive power control command. In order to reduce this fluctuation width, the phase angle of the excitation voltage is simultaneously controlled by the reactive power control command.
第１図は、可変速揚水発電システムの概要を示
すものであり、一次、二次側共、３相巻線から成
る。同図で、１が固定子を、２が回転子を示す。
FIG. 1 shows an outline of a variable speed pumped storage power generation system, which consists of three-phase windings on both the primary and secondary sides. In the figure, 1 indicates a stator and 2 indicates a rotor.
５ａ〜５ｃは固定子のａ，ｂ，ｃ相巻線を、６
ａ〜６ｃは回転子のａ，ｂ，ｃ相巻線を示す。更
に、定格周波数を、すべりをｓとすると、回転
子の速度は（１−ｓ）であり、回転子の励磁巻
線をすべりｓの周波数で励磁することにより、回
転子の回転磁界はすべり零（同期速度）で回転
し、固定子の回転磁界の速度と同一になる。７は
回転子の回転数を測定する測定部を示し、この出
力により、３ですべり周波数を検出し、４ですべ
り周波数に応じた電圧を発生させ、２次巻線を励
磁することを示している。このようにすることに
より、任意の回転数で運転を行つても、常に電機
子巻線には、系統周波数の電圧を発生させること
ができる。すなわち、第１図の例では、回転子の
回転磁界は、
（１−ｓ）＋s＝ (1)
となり、すべりにかかわらず、定格周波数の出力
の得られることになる。この方式において、揚水
及び発電運転中の無効電力の制御指令に対して、
有効電力の過渡的な変動を小さくするための方式
を立案しようとするのが本願の主旨である。 5a to 5c are the a, b, and c phase windings of the stator;
a to 6c indicate the a, b, and c phase windings of the rotor. Furthermore, if the rated frequency is the rated frequency and the slip is s, the speed of the rotor is (1-s), and by exciting the excitation winding of the rotor at the frequency of the slip s, the rotor's rotating magnetic field has zero slip. (synchronous speed), which is the same as the speed of the rotating magnetic field of the stator. 7 indicates a measurement unit that measures the rotation speed of the rotor, and from this output, 3 detects the slip frequency, and 4 generates a voltage according to the slip frequency to excite the secondary winding. There is. By doing so, even if the motor is operated at any rotational speed, a voltage at the system frequency can always be generated in the armature winding. That is, in the example shown in FIG. 1, the rotating magnetic field of the rotor is (1-s)+s=(1), and an output at the rated frequency can be obtained regardless of slippage. In this method, in response to control commands for reactive power during pumping and power generation operations,
The gist of the present application is to devise a method for reducing transient fluctuations in active power.
第２図は、本システムの具体例を示すものであ
り、可動速機が系統に接続運転してい場合を示し
てある。１０は電力系統を、１，２は第１図と同
一の固定子及び回転子を示している。静落差Ｈ及
び出力指令P0が与えられると、１５の指令値算
出回路で、効率を考慮したガイドベーンの開度指
令値及び速度指令値が算出される。１４は調速機
の弁開度設定器であり、指令値算出回路１５より
の開度指令値が１４の開度設定器により時間遅れ
をもつて与えられ、調速機のガイドベーン１２の
開度が定まる。１３は水車部であり、静落差Ｈ、
１４の調速機のガイドベーン開度及び回転数より
定まる。この水車特性により、可変速機の回転子
２は回転する。１１は速度発電機を示し、この出
力により、速度が検出される。１９は電流変成器
を、２０は電圧変成器を示し、２１で、電流変成
器１９及び電圧変成器２０の出力をもとに、無効
電力及び有効電力を算出する。Q0は無効電力の
指令値を示し、可変速機の無効電力の算出値と無
効電力の指令値の差を合成部２７で求め、この値
を電圧の変化量に変換する変換部２４で電圧の変
化量を求める。この値を電圧の設定値V0から減
ずる減算部２５で電圧の制御量を求め、この値と
可変速機の電圧を合成部２６で合成する。 FIG. 2 shows a specific example of this system, and shows a case in which a movable speed machine is connected to the power grid. Reference numeral 10 indicates an electric power system, and 1 and 2 indicate the same stator and rotor as in FIG. When the static head difference H and the output command P 0 are given, the command value calculation circuit 15 calculates the opening command value and the speed command value of the guide vane in consideration of efficiency. Reference numeral 14 denotes a valve opening setting device of the speed governor, and the opening command value from the command value calculation circuit 15 is given with a time delay by the opening setting device 14, and the opening of the guide vane 12 of the speed governor is applied. The degree is determined. 13 is a water wheel section, static head H,
It is determined from the guide vane opening degree and rotation speed of the speed governor in No. 14. Due to this water wheel characteristic, the rotor 2 of the variable speed machine rotates. Reference numeral 11 indicates a speed generator, and the speed is detected by the output of this generator. Reference numeral 19 indicates a current transformer, 20 indicates a voltage transformer, and at 21, reactive power and active power are calculated based on the outputs of the current transformer 19 and the voltage transformer 20. Q 0 indicates a command value of reactive power, the difference between the calculated value of reactive power of the variable speed machine and the command value of reactive power is obtained in the synthesis unit 27, and the voltage Find the amount of change. A subtraction unit 25 subtracts this value from the voltage set value V 0 to obtain a voltage control amount, and a synthesis unit 26 combines this value with the voltage of the variable speed machine.
１６は２次巻線の位相角算出部であり、電力算
出部２１の有効電力及び出力指令P0より、位相
角を算出する。１７は、２次回路の励磁量を設定
する設定部であり、位相角算出部１６の出力及び
電圧調整部１８の出力より算出される。電圧調整
部１８は、励磁回路の電圧値を制御する部分であ
り、合成部２６の出力により算出する。２３ａ，
２３ｂ，２３ｃは１７で設定した励磁量をａ，
ｂ，ｃ相に用いるために移相する移相部である。
２２ａ，２２ｂ，２２ｃは移相部２３ａ，２３
ｂ，２３ｃで移相した励磁量でａ，ｂ，ｃ相を励
磁する励磁巻線である。 Reference numeral 16 denotes a phase angle calculating section of the secondary winding, which calculates the phase angle from the active power of the power calculating section 21 and the output command P 0 . Reference numeral 17 denotes a setting section for setting the excitation amount of the secondary circuit, which is calculated from the output of the phase angle calculation section 16 and the output of the voltage adjustment section 18. The voltage adjustment section 18 is a section that controls the voltage value of the excitation circuit, and calculates the voltage value based on the output of the synthesis section 26. 23a,
23b and 23c are the excitation amount set in 17, a,
This is a phase shift section that shifts the phase for use in the b and c phases.
22a, 22b, 22c are phase shift parts 23a, 23
This is an excitation winding that excites phases a, b, and c with excitation amounts phase-shifted by b and 23c.
このように、出力指令に対して、ガイドベーン
の開度指令値、速度指令値が求められ、これらの
値より２次励磁電圧の位相角を算出して２次励磁
の制御を行う必要がある。しかし、無効電力の制
御指令が与えられた場合に有効電力の過渡的な変
動を小さくするように制御する方式はまだ確立さ
れておらず、この方式を確立する必要がある。 In this way, the guide vane opening degree command value and speed command value are determined in response to the output command, and it is necessary to calculate the phase angle of the secondary excitation voltage from these values to control the secondary excitation. . However, a control method that reduces transient fluctuations in active power when a reactive power control command is given has not yet been established, and it is necessary to establish such a method.
以下、本発明の一実施例を第３図により説明す
る。第３図は第２図同様、可変速機が系統に接続
している場合を示してある。この図の第２図との
相違は、ブロツク１８の出力である２次励磁電圧
をもとに合成部３１で２次励磁電圧の運転電圧
Vf0との差をとり、この出力にゲイン乗算部３２
でゲインを乗じ、この出力と位相角算出部１６の
出力の差を合成部３３でとる。要するに、本発明
の装置は可変速揚水発電装置における有効電力
と、無効電力をともに適正に制御するのである。 An embodiment of the present invention will be described below with reference to FIG. Similar to FIG. 2, FIG. 3 shows a case where a variable speed machine is connected to the grid. The difference between this figure and FIG.
The gain multiplier 32 calculates the difference from V f0 and applies this output to the gain multiplier
The difference between this output and the output of the phase angle calculation section 16 is calculated by the synthesis section 33. In short, the device of the present invention appropriately controls both active power and reactive power in a variable speed pumped storage power generation device.
このうち、有効電力の制御は二次巻線の交流励
磁電圧の位相調整により達成され、具体的には出
力指令と電力系統の実有効電力を入力して二次巻
線２を交流励磁するときの位相角を算出する二次
巻線位相角算出部１６において、適正な位相角が
求められる。 Among these, control of active power is achieved by adjusting the phase of the AC excitation voltage of the secondary winding. Specifically, when the output command and the actual active power of the power system are input to AC excite the secondary winding 2. An appropriate phase angle is determined in the secondary winding phase angle calculation unit 16 that calculates the phase angle of .
また、無効電力の制御は二次巻線の交流励磁電
圧の大きさの調整により達成され、この交流励磁
電圧の大きさを決定するに当たり、無効電力と端
子電圧とは相互に密接に関係することから、無効
電力と端子電圧とをパラメータとして交流励磁電
圧の大きさを決定する。この制御は電圧調整部１
８で行われるが、この考え方は同期機の自動電圧
調整機能と類似のものである。 In addition, control of reactive power is achieved by adjusting the magnitude of the AC excitation voltage of the secondary winding, and in determining the magnitude of this AC excitation voltage, it is important to note that reactive power and terminal voltage are closely related to each other. From this, the magnitude of the AC excitation voltage is determined using the reactive power and the terminal voltage as parameters. This control is performed by the voltage regulator 1
8, this idea is similar to the automatic voltage adjustment function of a synchronous machine.
二次巻線励磁量設定部１７は、二次巻線位相角
算出部１６の出力に応じて交流励磁電圧の位相を
制御し、電圧調整部１８の出力に応じて交流励磁
電圧の大きさを制御する。 The secondary winding excitation amount setting section 17 controls the phase of the AC excitation voltage according to the output of the secondary winding phase angle calculation section 16, and adjusts the magnitude of the AC excitation voltage according to the output of the voltage adjustment section 18. Control.
係る制御を前提として、本発明においては、無
効電力と有効電力とは相互に密接に関係すること
から、無効電力調整の際の有効電力の変動を阻止
すべく、電圧調整部１８の出力と二次励磁電圧の
運転電圧との偏差に所定のゲインを乗した信号で
前記二次巻線位相角算出部１６の出力を修正する
手段３１，３２，３３を備えたものである。 On the premise of such control, in the present invention, since reactive power and active power are closely related to each other, in order to prevent fluctuations in active power during reactive power adjustment, the output of voltage adjustment section 18 and It is provided with means 31, 32, and 33 for correcting the output of the secondary winding phase angle calculation section 16 using a signal obtained by multiplying the deviation of the next excitation voltage from the operating voltage by a predetermined gain.
このようにすることにより、無効電力の制御指
令に対して２次励磁電圧の制御が行われ、このた
めに生じた有効電力の変動を補償するように２次
励磁電圧の位相角が制御されるため、有効電力の
過渡的な変動を小さくおさえることができる。
By doing this, the secondary excitation voltage is controlled in response to the reactive power control command, and the phase angle of the secondary excitation voltage is controlled to compensate for the fluctuations in the active power that occur due to this. Therefore, transient fluctuations in active power can be suppressed.
第４図の曲線ａは、有効電力の制御指令を与え
た場合の有効電力の従来の特性を、同図の曲線ｂ
は、本願の方式を用いた場合の有効電力の変動特
性を示す。 Curve a in Figure 4 represents the conventional characteristic of active power when an active power control command is given, and curve b in Figure 4 represents the conventional characteristic of active power when an active power control command is given.
shows the fluctuation characteristics of the active power when using the method of the present application.
第１図は可変速揚水発電システムの原理概要、
第２図は可変速揚水発電システムの制御概要、第
３図は本願の概要を示す図、第４図は本願及び従
来方式の有効電力変動曲線である。
１３……水車部、１４……調速機の弁開度設定
器、１５……指令値算出回路、１６……２次巻線
位相角算出部、１７……２次巻線励磁量設定部、
１８……電圧調整部、１９……電流変成器、２０
……電圧変成器、２１……電力算出部、２２ａ〜
２２ｃ……２次励磁のａ，ｂ，ｃ相巻線、P0…
…出力指令値、N0……速度指令値、Ｎ……速度、
２３ａ〜２３ｃ……移相部、２４……変換部、２
５……減算部、２６，２７……合成部、３１……
合成部、３２……乗算部、３３……合成部。
Figure 1 shows an overview of the principle of a variable speed pumped storage power generation system.
FIG. 2 is a control overview of the variable speed pumped storage power generation system, FIG. 3 is a diagram showing an overview of the present invention, and FIG. 4 is an active power fluctuation curve of the present invention and the conventional system. 13... Water turbine section, 14... Governor valve opening setting device, 15... Command value calculation circuit, 16... Secondary winding phase angle calculation section, 17... Secondary winding excitation amount setting section ,
18... Voltage adjustment section, 19... Current transformer, 20
... Voltage transformer, 21 ... Power calculation section, 22a ~
22c... Secondary excitation a, b, c phase winding, P 0 ...
...Output command value, N 0 ...Speed command value, N ...Speed,
23a to 23c...phase shift section, 24...conversion section, 2
5... Subtraction section, 26, 27... Combination section, 31...
Combining section, 32... Multiplying section, 33... Combining section.
Claims (1)
を交流励磁するとともに二次巻線側に水量を調整
するガイドベーン１２を備えるポンプ水車１３を
設けた可変速揚水発電システムの励磁制御方式に
おいて、 水位と出力指令とを入力し、前記ポンプ水車１
３のガイドベーン１２の開度を調整するガイドベ
ーン開度調整手段１５，１４、前記出力指令と電
力系統の実有効電力を入力して二次巻線２を交流
励磁するときの位相角を算出する二次巻線位相角
算出部１６、電力系統の無効電力の指令値と実無
効電力の偏差から電圧の変化量を求める変換部２
４、電力系統の電圧の指令値を変換部２４の出力
で修正した信号と電力系統の実電圧の偏差を入力
として電力系統の電圧を所定値に制御するための
電圧調整部１８、電圧調整部１８の出力と前記二
次巻線位相角算出部１６の出力とを入力し、電圧
調整部１８の出力により二次巻線２を交流励磁す
るときの励磁電圧の大きさを設定し、二次巻線位
相角算出部１６の出力により励磁電圧の位相を設
定する励磁量設定部１７、前記電圧調整部１８の
出力と二次励磁電圧の運転電圧との偏差に所定の
ゲインを乗じた信号で前記二次巻線位相角算出部
１６の出力を修正する手段３１，３２，３３を備
えることを特徴とする可変速揚水発電システムの
励磁制御方式。[Claims] 1. The primary winding 1 is connected to the power system, and the secondary winding 2 is connected to the power system.
In the excitation control method of a variable speed pumped storage power generation system, which is equipped with a pump turbine 13 equipped with a guide vane 12 for adjusting the amount of water on the secondary winding side, the pump turbine 1 is
Guide vane opening adjustment means 15 and 14 adjust the opening of the guide vanes 12 of No. 3, and calculate the phase angle when AC excitation of the secondary winding 2 by inputting the output command and the actual active power of the power system. a secondary winding phase angle calculation unit 16 that calculates the voltage change amount from the deviation between the command value of the reactive power of the power system and the actual reactive power
4. A voltage regulator 18 for controlling the voltage of the power grid to a predetermined value by inputting the deviation between the signal obtained by correcting the command value of the voltage of the power grid by the output of the converter 24 and the actual voltage of the power grid; 18 and the output of the secondary winding phase angle calculation section 16 are input, and the magnitude of the excitation voltage when AC excitation of the secondary winding 2 is set by the output of the voltage adjustment section 18. An excitation amount setting section 17 that sets the phase of the excitation voltage based on the output of the winding phase angle calculation section 16, and a signal obtained by multiplying the deviation between the output of the voltage adjustment section 18 and the operating voltage of the secondary excitation voltage by a predetermined gain. An excitation control method for a variable speed pumped storage power generation system, comprising means 31, 32, and 33 for correcting the output of the secondary winding phase angle calculating section 16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61078131A JPS62236396A (en) | 1986-04-07 | 1986-04-07 | Operation control system for variable speed pumpingup generator plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61078131A JPS62236396A (en) | 1986-04-07 | 1986-04-07 | Operation control system for variable speed pumpingup generator plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62236396A JPS62236396A (en) | 1987-10-16 |
| JPH0576279B2 true JPH0576279B2 (en) | 1993-10-22 |
Family
ID=13653326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61078131A Granted JPS62236396A (en) | 1986-04-07 | 1986-04-07 | Operation control system for variable speed pumpingup generator plant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62236396A (en) |
-
1986
- 1986-04-07 JP JP61078131A patent/JPS62236396A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62236396A (en) | 1987-10-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |