JP2002044867A - Power conversion device - Google Patents
Power conversion deviceInfo
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- JP2002044867A JP2002044867A JP2000226191A JP2000226191A JP2002044867A JP 2002044867 A JP2002044867 A JP 2002044867A JP 2000226191 A JP2000226191 A JP 2000226191A JP 2000226191 A JP2000226191 A JP 2000226191A JP 2002044867 A JP2002044867 A JP 2002044867A
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- Prior art keywords
- power
- frequency
- command value
- converter
- value
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- Inverter Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電力系統と連系す
る電力変換装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power conversion device connected to a power system.
【０００２】[0002]
【従来の技術】特開平９−６５５８８号公報に記載の変
換器の制御装置では、通常は系統に負荷平準化指令Ｐ*
に従い電力を出力し、系統周波数が変動した際には電力
指令値に周波数調整器出力を加算し、さらに事故などの
系統異常時には周波数調整器の出力リミッタをしぼると
ともに電力動揺抑制制御の出力リミッタを開いて電力動
揺抑制をする。また、蓄電量の末期には電力動揺抑制制
御や周波数制御を行わないようにリミッタで制御出力を
制限している。2. Description of the Related Art In a converter control device described in Japanese Patent Application Laid-Open No. 9-65588, a load leveling command P * is usually applied to a system .
When the system frequency fluctuates, the output of the frequency adjuster is added to the power command value, and in the event of a system abnormality such as an accident, the output limiter of the frequency adjuster is squeezed and the output limiter of the power fluctuation suppression control is added. Open to suppress power fluctuation. Also, at the end of the storage amount, the control output is limited by a limiter so that the power fluctuation suppression control and the frequency control are not performed.
【０００３】[0003]
【発明が解決しようとする課題】上記のように、従来技
術では、電力が頻繁に変動する負荷や発電設備と一緒に
設置された場合、電力変動による系統周波数の変化から
周波数変動を抑制するための電力補償用の充放電指令を
作成することになり、周波数という間接的な手段で電力
変動を捉える為、比較的速い電力変動が継続する場合に
系統周波数を効果的に維持することが難しい。As described above, in the prior art, when installed together with a load or a power generation facility where the power fluctuates frequently, the frequency fluctuation is suppressed from the change in the system frequency due to the power fluctuation. In this case, a charge / discharge command for power compensation is generated, and power fluctuation is captured by an indirect means of frequency. Therefore, it is difficult to effectively maintain the system frequency when relatively fast power fluctuation continues.
【０００４】本発明の目的は、系統の周波数変動を抑制
するに好適な電力変換装置及びその制御方法を提供する
ことにある。[0004] An object of the present invention is to provide a power conversion device suitable for suppressing frequency fluctuations in a system and a control method thereof.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決するた
め、負荷または発電設備の電力変動を検出して抑制する
ように電力制御を行うとともに、系統の周波数を検出し
て周波数が所定値となるように電力制御の指令値を変更
して周波数制御を行う構成とした。In order to solve the above problems, power control is performed so as to detect and suppress power fluctuations of a load or a power generation facility, and a frequency of a system is detected and the frequency becomes a predetermined value. The frequency control is performed by changing the power control command value as described above.
【０００６】更に、比較的速い電力変動は直接電力を検
出して抑制し、比較的ゆっくりとした電力変動を周波数
制御系にて調整するように二つに分ける構成とした。Furthermore, a relatively fast power fluctuation is detected and suppressed by directly detecting power, and a relatively slow power fluctuation is divided into two so as to be adjusted by a frequency control system.
【０００７】更に、周波数調整器の出力をゼロにするよ
う周波数調整器の出力の低周波成分を周波数指令値に加
算する構成とした。Further, a low frequency component of the output of the frequency adjuster is added to the frequency command value so that the output of the frequency adjuster becomes zero.
【０００８】[0008]
【発明の実施の形態】（実施例１）以下本発明の一実施
例について図１を用いて説明する。(Embodiment 1) An embodiment of the present invention will be described below with reference to FIG.
【０００９】図１は、本発明による電力変換装置を実現
するための一実施例を示している。FIG. 1 shows an embodiment for realizing a power converter according to the present invention.
【００１０】図１において、電力系統に並列に電力変換
装置３ａと電力変動を発生する負荷または発電設備４ａ
が接続されている。電力変換装置３ａは連系用のトラン
ス６ａと電力変換器３ａ及び２次電池５ａ及び制御装置
８ａにより構成されている。In FIG. 1, a power conversion device 3a and a load or power generation facility 4a that generates power fluctuations are arranged in parallel with a power system.
Is connected. The power converter 3a includes an interconnecting transformer 6a, a power converter 3a, a secondary battery 5a, and a controller 8a.
【００１１】電力変換器３ａの連系点の電圧Ｖc は電圧
検出器１ｂにより検出され、位相検出器および電力検出
器および周波数検出器に入力される。また電力変換器の
連系点電流Ｉc は電流検出器２ａにより検出され、電力
検出器に入力される。変換器の出力電流Ｉacr は電流検
出器２ｂにより検出され、変換器制御器へ入力される。The voltage Vc at the interconnection point of the power converter 3a is detected by the voltage detector 1b and is input to the phase detector, the power detector and the frequency detector. Further, the interconnection point current Ic of the power converter is detected by the current detector 2a and input to the power detector. The output current Iacr of the converter is detected by the current detector 2b and input to the converter controller.
【００１２】前記負荷または発電設備４ａの電圧ＶＬは
電圧検出器１ａにより検出され、制御装置８ａの電力検
出器に入力される。また、前記負荷または発電設備４ａ
の電流ＩＬは電流検出器２ｃにより検出され、制御装置
８ａの電力検出器に入力される。電力検出器は、負荷ま
たは発電設備４ａの電力ＰＬ，ＱＬを出力する。The voltage VL of the load or the power generation equipment 4a is detected by a voltage detector 1a and input to a power detector of a control device 8a. In addition, the load or power generation equipment 4a
Is detected by the current detector 2c and input to the power detector of the control device 8a. The power detector outputs the power PL, QL of the load or the power generation equipment 4a.
【００１３】位相検出器は系統の電圧Ｖc に追従した位
相信号θc を変換器制御器へ出力する。The phase detector outputs a phase signal θc following the voltage Vc of the system to the converter controller.
【００１４】変換器制御器８ａでは、電圧位相θc ，電
力変換器３ａの連系点電圧Ｖc および変換器電流Ｉacr
を用いて変換器が吸収または放出する有効電力及び無効
電力を制御するためのゲートパルスＧp を電力変換器３
ａへ出力する。In the converter controller 8a, the voltage phase θc, the interconnection point voltage Vc of the power converter 3a, and the converter current Iacr
A gate pulse Gp for controlling the active power and the reactive power absorbed or released by the converter by using the power converter 3
Output to a.
【００１５】図２は本実施例の電力調整器および周波数
調整器および電力指令発生器の構成を示している。以下
図２を用いて本実施例の電力調整器および周波数調整器
および電力指令発生器について説明する。図２は周波数
調整器を詳細に示している。図２において系統電圧Ｖc
から得られた周波数検出値ｆと周波数指令発生器から出
力される周波数指令値ｆ* は加減算器７ｄに入力され、
加減算器７ｄは偏差Δｆを演算する。偏差Δｆは周波数
調整器に入力され偏差Δｆをゼロにするように出力電力
指令値Ｐf を調整する。FIG. 2 shows the configuration of the power regulator, frequency regulator and power command generator of the present embodiment. Hereinafter, the power regulator, the frequency regulator, and the power command generator of the present embodiment will be described with reference to FIG. FIG. 2 shows the frequency adjuster in detail. In FIG. 2, the system voltage Vc
And the frequency command value f * output from the frequency command generator are input to the adder / subtractor 7d,
The adder / subtracter 7d calculates the deviation Δf. The deviation Δf is input to a frequency adjuster to adjust the output power command value Pf so that the deviation Δf becomes zero.
【００１６】また、電力指令発生器は、周波数調整器か
らの電力指令値Ｐf および負荷または発電設備の電力Ｐ
Ｌを入力する。入力された電力検出値ＰＬはフィルタに
入力され高周波成分を除去した低周波成分の電力検出値
を加減算器７ａに出力する。加減算器７ａは電力指令Ｐ
* とフィルタからの出力と周波数調整器の出力を加算し
て電力指令値Ｐs*を演算し出力する。The power command generator includes a power command value Pf from the frequency adjuster and a power P
Enter L. The input power detection value PL is input to the filter, and outputs the power detection value of the low frequency component from which the high frequency component has been removed to the adder / subtractor 7a. The adder / subtractor 7a receives the power command P
* , The output from the filter and the output of the frequency adjuster are added to calculate and output a power command value Ps * .
【００１７】加減算器７ｋは変換器の入出力電力Ｐi と
負荷又は発電設備４ａの電力ＰＬを加算し、加減算器７
ｃに加減算値Ｐs を出力する。加減算器７ｃでは電力指
令値Ｐs*とＰi とＰＬの加算値の偏差を演算し、有効電
力調整器ＡＰＲにその偏差を出力する。有効電力調整器
ＡＰＲは入力値である偏差をゼロにするように有効分電
流指令値Ｉd*を出力する。有効電力調整器のフィードバ
ックに負荷又は発電設備の電力ＰＬと変換器の入出力電
力Ｐi を加算して用いるため、電力指令値Ｐs*は、変換
器と負荷又は発電設備トータルの電力指令値すなわち系
統母線側の電力指令値に相当する。The adder / subtractor 7k adds the input / output electric power Pi of the converter and the electric power PL of the load or the power generation equipment 4a.
An addition / subtraction value Ps is output to c. The adder / subtractor 7c calculates a deviation between the power command value Ps * and the added value of Pi and PL, and outputs the deviation to the active power regulator APR. The active power regulator APR outputs an active component current command value Id * so that the deviation that is the input value becomes zero. Since the power PL of the load or the power generation equipment and the input / output power Pi of the converter are used for the feedback of the active power regulator and used, the power command value Ps * is the total power command value of the converter and the load or the power generation equipment, that is, the system. This corresponds to the power command value on the bus side.
【００１８】図３は本実施例の変換器制御器の構成を示
している。以下図３を用いて本実施例の変換器制御器に
ついて説明する。FIG. 3 shows the configuration of the converter controller of the present embodiment. Hereinafter, the converter controller of this embodiment will be described with reference to FIG.
【００１９】変換器制御器は、変換器から系統に出力さ
れている無効電力Ｑを電力検出器で検出し、得られた無
効電力値Ｑを無効電力調整器ＡＱＲに入力し、無効電力
調整器ＡＱＲにて、電力Ｑを指令値Ｑ* に一致させるよ
うに無効分電流指令値Ｉq*を演算する。The converter controller detects a reactive power Q output from the converter to the system by a power detector, inputs the obtained reactive power Q to a reactive power regulator AQR, and In the AQR, a reactive current command value Iq * is calculated so that the power Q matches the command value Q * .
【００２０】また、位相信号θc は電流Ｉacr の座標変
換器及び電圧Ｖs の座標変換器に入力される。各座標変
換器は位相信号θc を用いて三相交流信号を２軸の直流
量に変換し、電流Ｉacr はＩd 及びＩq に変換され、電
圧Ｖc はＶds及びＶqsに変換される。The phase signal θc is input to a coordinate converter for the current Iacr and a coordinate converter for the voltage Vs. Each coordinate converter converts the three-phase AC signal into a two-axis DC amount using the phase signal θc, the current Iacr is converted into Id and Iq, and the voltage Vc is converted into Vds and Vqs.
【００２１】Ｉd*及びＩq*はそれぞれ減算器７ｇ，７ｆ
に入力され、電流Ｉacr のフィードバック値Ｉd 及びＩ
q と減算器７ｇ，７ｆにて演算され、結果をそれぞれｄ
軸電流調整器ＡＣＲd及びｑ軸電流調整器ＡＣＲqに出力
する。また、Ｉd*及びＩq*はそれぞれ非干渉成分演算器
ｗＬに出力される。各電流調整器ＡＣＲd及びＡＣＲqの
出力は加減算器７ｈと加減算器７ｉのそれぞれに出力さ
れる。またｑ軸の電流指令値Ｉq*から非干渉成分演算器
ｗＬは非干渉成分を演算し加減算器７ｈに出力する。同
様にｄ軸の電流指令値Ｉd*から非干渉成分演算器ｗＬは
非干渉成分を演算し加減算器７ｉに出力する。Id * and Iq * are subtractors 7g and 7f, respectively.
And the feedback values Id and I of the current Iacr
q and subtracters 7g and 7f calculate the result, and
Output to the axis current regulator ACRd and the q-axis current regulator ACRq. Further, Id * and Iq * are output to the non-interference component calculator wL. The outputs of the current regulators ACRd and ACRq are output to the adder / subtractor 7h and the adder / subtractor 7i, respectively. The non-interference component calculator wL calculates the non-interference component from the q-axis current command value Iq * and outputs the result to the adder / subtractor 7h. Similarly, the non-interference component calculator wL calculates the non-interference component from the d-axis current command value Id * and outputs the non-interference component to the adder / subtractor 7i.
【００２２】加減算器７ｈ及び７ｉは更に、前記電圧検
出値のｄ軸成分Ｖds及びｑ軸成分Ｖqsをそれぞれ加算し
て、演算結果のＶｄ* 及びＶｑ* を２相３相座標変換器
に出力し、２相３相座標変換器は、位相信号θc′を用
いて入力されたＶｄ*及びＶｑ*の信号を三相交流に変換
してＰＷＭ演算器に出力し、ＰＷＭ演算はゲートパルス
Ｇp を出力する。The adders / subtractors 7h and 7i further add the d-axis component Vds and the q-axis component Vqs of the detected voltage value, and output the operation results Vd * and Vq * to the two-phase three-phase coordinate converter. The two-phase / three-phase coordinate converter converts the input Vd * and Vq * signals into three-phase alternating current by using the phase signal θc ′ and outputs the three-phase alternating current to the PWM calculator. The PWM calculation outputs the gate pulse Gp. I do.
【００２３】位相演算器について説明する。系統電圧Ｖ
c を三相二相変換して得られる結果cos(ω・ｔ＋φ）及
びsin(ω・ｔ＋φ）の内のsin(ω・ｔ＋φ）を式（１）
及び式（２）に示すフーリス変換の式にて演算し、Ｖa
Ｒ及びＶaＩを得る。また、同様にcos(ω・ｔ＋φ）を
式（３）及び式（４）に示すフーリエ変換の式にて演算
し、ＶbＲ及びＶbＩ を得る。但し式において、内部発
振器信号をcos(ω・ｔ)及びsin(ω・ｔ)とし、ｔを時
間、φを内部発振器との位相差とする。The phase calculator will be described. System voltage V
The sin (ω · t + φ) of the results cos (ω · t + φ) and sin (ω · t + φ) obtained by three-phase to two-phase conversion of c is expressed by equation (1).
And the equation of the Fourier transform shown in equation (2) is used to calculate Va.
Obtain R and VaI. Similarly, cos (ω · t + φ) is calculated by the Fourier transform equations shown in equations (3) and (4) to obtain VbR and VbI. However, in the equation, the internal oscillator signals are cos (ω · t) and sin (ω · t), t is time, and φ is the phase difference from the internal oscillator.
【００２４】[0024]
【数１】 (Equation 1)
【００２５】[0025]
【数２】 (Equation 2)
【００２６】[0026]
【数３】 (Equation 3)
【００２７】[0027]
【数４】 (Equation 4)
【００２８】更に得られた結果を用いて式（５）及び式
（６）に示す式にて演算し、ＶＲ及びＶＩを得る。Further, using the obtained results, calculations are performed according to the equations (5) and (6) to obtain VR and VI.
【００２９】[0029]
【数５】 ＶＲ＝ＶaＲ＋ＶbＩ …（５）VR = VaR + VbI (5)
【００３０】[0030]
【数６】 ＶＩ＝ＶbＲ−ＶaＩ …（６） 演算結果ＶＲ及びＶＩは、式（７）による座標変換で内
部発振器の位相cos(ω・ｔ)及びsin(ω・ｔ)を使って交
流信号Ｖcos及びＶsinに変換される。VI = VbR−VaI (6) The calculation results VR and VI are obtained by using the phases cos (ω · t) and sin (ω · t) of the internal oscillator in the coordinate conversion according to the equation (7). It is converted to Vcos and Vsin.
【００３１】[0031]
【数７】 Ｖcos＋ＶＲ・cos(ω・ｔ)＋ＶＩ・sin(ω・ｔ) Ｖsin−ＶＲ・sin(ω・ｔ)＋ＶＩ・cos(ω・ｔ) …（７） 更に式（８）に示す演算式にて位相角θc が演算され
る。V cos + VR cos (ω · t) + VI · sin (ω · t) V sin−VR · sin (ω · t) + VI · cos (ω · t) (7) The phase angle θc is calculated by the equation.
【００３２】[0032]
【数８】 θc ＝Ａtan(Ｖsin／Ｖcos) …（８） 周波数検出器は、系統の周波数を例えばゼロクセスの間
隔などから検出した値ｆを出力する。Θc = Atan (Vsin / Vcos) (8) The frequency detector outputs a value f obtained by detecting the frequency of the system from, for example, the interval of zero access.
【００３３】本実施の形態によれば、負荷または発電設
備の電力変動を検出して抑制するように電力制御を行う
とともに、系統の周波数を検出して周波数が所定値とな
るように電力制御の指令値を変更して周波数制御を行う
ことが出来るので、系統周波数が変動負荷による影響を
受ける前に周波数変動を防止することが可能になるとと
もに、周波数制御により系統の発電設備と負荷との電力
需給バランスのゆっくりとした変動を周波数制御系にて
効果的に調整可能となる。According to the present embodiment, the power control is performed so as to detect and suppress the power fluctuation of the load or the power generation equipment, and the power control is performed so that the frequency of the system is detected and the frequency becomes a predetermined value. Since the frequency control can be performed by changing the command value, it is possible to prevent the frequency fluctuation before the system frequency is affected by the fluctuating load. Slow fluctuations in the supply and demand balance can be effectively adjusted by the frequency control system.
【００３４】本実施例では、比較的速い電力変動は直接
電力を検出して抑制し、比較的ゆっくりとした電力変動
（負荷の日変化）を周波数制御系にて調整するように二
つに分けるため、周波数調整器のゲインを周波数変動の
低周波成分に合わせて最適に調整可能となる。In this embodiment, relatively fast power fluctuations are detected and suppressed by directly detecting power, and relatively slow power fluctuations (daily changes in load) are divided into two so as to be adjusted by a frequency control system. Therefore, the gain of the frequency adjuster can be optimally adjusted according to the low frequency component of the frequency fluctuation.
【００３５】次に、本発明の他の実施例を説明する。な
お、各図を通して同等の構成要素には同一の符号を付し
て、詳細な説明は省略することにする。 （実施例２）図４は図２における周波数調整器の他の実
施例を示している。Next, another embodiment of the present invention will be described. Note that the same reference numerals are given to the same components throughout the drawings, and detailed description will be omitted. (Embodiment 2) FIG. 4 shows another embodiment of the frequency adjuster in FIG.
【００３６】図４において、系統電圧から得られた周波
数検出値ｆと周波数指令発生器から出力される周波数指
令値ｆ* および周波数調整器の出力をフィルタとリミッ
タを介した信号fbを加減算器７ｊに入力し、加減算器７
ｊにて周波数指令値ｆ* からfbおよび周波数ｆを減算し
周波数調整器の偏差Δｆを演算する。In FIG. 4, the frequency detection value f obtained from the system voltage, the frequency command value f * output from the frequency command generator, and the output of the frequency adjuster are added to a signal fb via a filter and a limiter to adder / subtractor 7j. To the adder / subtractor 7
At j, fb and the frequency f are subtracted from the frequency command value f * to calculate a deviation Δf of the frequency adjuster.
【００３７】周波数調整器は偏差Δｆをゼロにするよう
に電力指令値Ｐf を調整する。The frequency adjuster adjusts the power command value Pf so that the deviation Δf becomes zero.
【００３８】フィルタは周波数調整器の電力指令値Ｐf
を入力し、電力指令値Ｐf の低周波成分ＰfＬをリミッ
タに出力する。リミッタは低周波成分ＰfＬ を入力し、
ＰfＬに定数を乗算し、その結果が制限値を超えないよ
うに入力値に制限をかけて周波数補正値fbを出力する。
制限値としては例えば、系統の周波数許容値の範囲内の
値を用いる。また、ＰfＬ に乗算する定数の値は、例え
ば電力出力値ｘに対して周波数の変動がｙ発生するとき
には、ｙ／ｘを定数として設定する。また、フィルタの
時定数は、例えば本発明の電力変換装置が接続されてい
る系統において、系統に接続されている発電機の周波数
制御系の応答よりも長い時定数を設定する。The filter is a power command value Pf of the frequency adjuster.
And outputs the low frequency component PfL of the power command value Pf to the limiter. The limiter inputs the low frequency component PfL,
PfL is multiplied by a constant, and the input value is limited so that the result does not exceed the limit value, and the frequency correction value fb is output.
As the limit value, for example, a value within the range of the system frequency allowable value is used. The value of the constant to be multiplied by PfL is set to y / x as a constant when, for example, a frequency variation y occurs with respect to the power output value x. Further, the time constant of the filter is set to a time constant longer than the response of the frequency control system of the generator connected to the system, for example, in the system to which the power converter of the present invention is connected.
【００３９】本実施例によれば、実施例１と同様の効果
に加え、周波数調整器の出力をゼロにするよう周波数調
整器の出力の低周波成分を周波数指令値に加算するた
め、周波数制御のために出力した電力を系統の発電機に
周波数変動なく分担させ電力変換装置の電力量を少なく
出来る。 （実施例３）図５は、実施例１の２次電池５ａを用いた
電力貯蔵用変換器に、超電導システムを適用した場合の
実施例である。電力変換器の直流部分には超電導コイル
100が設置されており、超電導システムはシステム制御
装置からの指令により電力を系統とやりとりする。本実
施例では、超電導システムの周波数制御が可能になる。According to this embodiment, in addition to the same effects as those of the first embodiment, the low frequency component of the output of the frequency adjuster is added to the frequency command value so that the output of the frequency adjuster becomes zero. Therefore, the power output from the power converter can be shared by the power generator of the system without frequency fluctuation, and the power amount of the power converter can be reduced. (Embodiment 3) FIG. 5 shows an embodiment in which a superconducting system is applied to the power storage converter using the secondary battery 5a of the first embodiment. Superconducting coil for DC part of power converter
100 are installed, and the superconducting system exchanges electric power with the system according to a command from the system controller. In this embodiment, the frequency control of the superconducting system becomes possible.
【００４０】また、超電導システムの他に図６に示すよ
うな、太陽光発電装置も適用できる。太陽光発電装置
の、電力変換器の直流部分には太陽電池パネル１０１が
設置されており、制御装置からの指令により電力を系統
へ放出する。In addition to the superconducting system, a solar power generator as shown in FIG. 6 can be applied. A solar cell panel 101 is provided in a DC portion of a power converter of the solar power generation device, and discharges power to a system according to a command from a control device.
【００４１】また、太陽光発電装置の他に図７に示すよ
うな、インバータ３ｄ及びコンバータ３ｅを有する風力
発電システム４ｂにも適用できる。インバータ３ｄ及び
コンバータ３ｅの直流部分は共通で使用しており、電力
貯蔵用の電池が設置されており、システム制御装置から
の指令により電力を系統から吸収あるいは放出する。In addition to the photovoltaic power generator, the present invention can be applied to a wind power generation system 4b having an inverter 3d and a converter 3e as shown in FIG. The DC portions of the inverter 3d and the converter 3e are commonly used, and a battery for power storage is installed, and power is absorbed or discharged from the system according to a command from the system controller.
【００４２】また、風力発電システムの他に図８に示す
ような、インバータ３ｆ及びコンバータ３ｇおよびフラ
イホイール付発電機１０３を有する可変速発電システム
にも適用できる。可変速発電システムの出力は、電力変
換器により系統へ電力を供給する。In addition to the wind power generation system, the present invention can be applied to a variable speed power generation system having an inverter 3f, a converter 3g and a generator 103 with a flywheel as shown in FIG. The output of the variable speed power generation system supplies power to the grid by a power converter.
【００４３】また、風力発電システムの他に図９に示す
ような、直流送電システムにも適用できる。直流送電シ
ステムの出力は、電力変換器３ｈ，３ｉにより系統へ電
力を供給する。In addition to the wind power generation system, the present invention can be applied to a DC power transmission system as shown in FIG. The output of the DC power transmission system supplies power to the grid by power converters 3h and 3i.
【００４４】[0044]
【発明の効果】本発明によれば、負荷または発電設備の
電力変動を検出して抑制するように電力制御を行うとと
もに、系統の周波数を検出して周波数が所定値となるよ
うに電力制御の指令値を変更して周波数制御を行うこと
が出来るので、系統周波数が変動負荷による影響を受け
る前に周波数変動を防止することが可能になるととも
に、周波数制御により系統の発電設備と負荷との電力需
給バランスのゆっくりとした変動を周波数制御系にて効
果的に調整可能となる。According to the present invention, power control is performed so as to detect and suppress power fluctuations of a load or a power generation facility, and the power control is performed so that the frequency of the system is detected and the frequency becomes a predetermined value. Since the frequency control can be performed by changing the command value, it is possible to prevent the frequency fluctuation before the system frequency is affected by the fluctuating load. Slow fluctuations in the supply and demand balance can be effectively adjusted by the frequency control system.
【００４５】さらに、比較的速い電力変動は直接電力を
検出して抑制し、比較的ゆっくりとした電力変動（負荷
の日変化）を周波数制御系にて調整するように二つに分
けるため、周波数調整器のゲインを周波数変動の低周波
成分に合わせて最適に調整可能となる。Further, a relatively fast power fluctuation is directly detected and suppressed, and a relatively slow power fluctuation (daily change in load) is divided into two so as to be adjusted by a frequency control system. The gain of the adjuster can be optimally adjusted according to the low frequency component of the frequency fluctuation.
【００４６】また、周波数調整器の出力をゼロにするよ
う周波数調整器の出力の低周波成分を周波数指令値に加
算するため、周波数制御のために出力した電力を系統の
発電機に周波数変動なく分担させ電力変換装置の電力量
を少なく出来る。Further, since the low frequency component of the output of the frequency adjuster is added to the frequency command value so that the output of the frequency adjuster becomes zero, the power output for frequency control is supplied to the generator of the system without frequency fluctuation. The amount of power of the power converter can be reduced by sharing the power.
【図１】本発明の一実施形態による、電力変換装置。FIG. 1 is a power converter according to one embodiment of the present invention.
【図２】図１の構成を説明する図。FIG. 2 is a diagram illustrating the configuration of FIG.
【図３】図１の構成を説明する図。FIG. 3 is a diagram illustrating the configuration of FIG.
【図４】本発明の他の実施例を説明する図。FIG. 4 is a diagram illustrating another embodiment of the present invention.
【図５】本発明の他の実施例を説明する図。FIG. 5 is a diagram illustrating another embodiment of the present invention.
【図６】本発明の他の実施例を説明する図。FIG. 6 is a diagram illustrating another embodiment of the present invention.
【図７】本発明の他の実施例を説明する図。FIG. 7 is a diagram illustrating another embodiment of the present invention.
【図８】本発明の他の実施例を説明する図。FIG. 8 is a diagram illustrating another embodiment of the present invention.
【図９】本発明の他の実施例を説明する図。FIG. 9 is a diagram for explaining another embodiment of the present invention.
１ａ，１ｂ…電圧検出器、２ａ，２ｂ，２ｃ…電流検出
器、３ａ…電力変換装置、４ａ，４ｂ…風力発電システ
ム、５ａ…２次電池、６ａ…トランス、７ａ，７ｂ，７
ｃ，７ｄ，７ｅ，７ｆ，７ｇ，７ｈ，７ｉ，７ｊ，７ｋ
…加減算器、８ａ，８ｂ，８ｃ，８ｄ，８ｅ，８ｆ…加
算器、９ａ，９ｂ…電力系統、ＶＬ…系統電圧、Ｖc…
連系点電圧、Ｉc…連系点電流、Ｉacr…変換器出力電流
Ｉacr、θc…位相信号、Ｇp…ゲートパルス、Ｐi，ＰＬ
…有効電力、Ｑ…無効電力、Ｉd…変換器電流ｄ軸電流
値、Ｉq …変換器電流ｑ軸電流値、Ｖds…連系点電圧ｄ
軸電圧成分、Ｖqs…連系点電圧ｑ軸電圧成分、Ｖｄ*…
ｄ軸電圧指令値、Ｖｑ*…ｑ軸電圧指令値、Ｐs*，Ｐ*…
有効電力指令値、Ｑ*…無効電力指令値、Ｐf …電力指
令値、ＰfＬ…低周波成分、ｆ…周波数、ｆ*…周波数指
令値、Δｆ…周波数偏差、fb…周波数補正値、ＡＰＲ…
有効電力調整器、ＡＱＲ…無効電力調整器、Ｉd*…ｄ軸
電流指令値、Ｉq*…ｑ軸電流指令値、ｗＬ…非干渉成分
演算器、ACRd…ｄ軸電流調整器、ＡＣＲq …ｑ軸電流調
整器、ＰＷＭ…ＰＷＭパルス演算器、１００…超電導コ
イル、１０１…太陽電池パネル、１０２…コンデンサ、
１０３…フライホイール発電電動機。1a, 1b: voltage detector, 2a, 2b, 2c: current detector, 3a: power converter, 4a, 4b: wind power generation system, 5a: secondary battery, 6a: transformer, 7a, 7b, 7
c, 7d, 7e, 7f, 7g, 7h, 7i, 7j, 7k
... Addition / subtraction units, 8a, 8b, 8c, 8d, 8e, 8f... Adders, 9a, 9b ... power system, VL ... system voltage, Vc ...
Interconnection point voltage, Ic: interconnection point current, Iacr: converter output current Iacr, θc: phase signal, Gp: gate pulse, Pi, PL
... Active power, Q ... Reactive power, Id ... Converter current d-axis current value, Iq ... Converter current q-axis current value, Vds ... Interconnection point voltage d
Axial voltage component, Vqs ... Connection point voltage q-axis voltage component, Vd * ...
d-axis voltage command value, Vq * ... q-axis voltage command value, Ps * , P * ...
Active power command value, Q * : reactive power command value, Pf: power command value, PfL: low frequency component, f: frequency, f * : frequency command value, Δf: frequency deviation, fb: frequency correction value, APR ...
Active power regulator, AQR: reactive power regulator, Id * : d-axis current command value, Iq * : q-axis current command value, wL: non-interference component calculator, ACRd: d-axis current regulator, ACRq: q-axis Current regulator, PWM: PWM pulse calculator, 100: superconducting coil, 101: solar cell panel, 102: capacitor,
103 ... flywheel generator motor.
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 5G066 HA15 HB06 HB09 JA01 JB01 JB03 5H007 AA04 BB07 CC23 CC32 DA03 DA05 DA06 DB01 DC02 DC04 DC05 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5G066 HA15 HB06 HB09 JA01 JB01 JB03 5H007 AA04 BB07 CC23 CC32 DA03 DA05 DA06 DB01 DC02 DC04 DC05
Claims (5)
器と、前記電力系統に接続された発電設備と、前記発電
設備の電力を検出する手段と、前記電力変換器の入出力
する電力を検出する手段と、前記発電設備の電力検出値
と前記電力変換器の電力検出値を用いて前記電力変換器
が入出力する電力を所定の値に制御するように出力電圧
指令値を演算する変換器制御手段と前記出力電圧指令値
より前記電力変換器を構成する素子のオンオフを制御す
るパルスを作成し出力する手段とを備えた電力変換装置
において、 変換器の連系点の電圧から周波数を検出する手段と、前
記周波数検出値と周波数指令値の偏差を小さくするよう
に有効電力指令値を補正する信号を出力する周波数制御
手段と、前記有効電力指令値の補正値を電力変換器の有
効電力指令値に加算または減算して補正した有効電力指
令値を作成する手段と、前記補正した有効電力指令値に
基づいて前記電力変換器の入出力有効電力を制御する変
換器制御手段とを備えたことを特徴とする電力変換装
置。1. A power system, a power converter connected to the power system, a power generation facility connected to the power system, a unit for detecting power of the power generation facility, and a power input / output of the power converter. And an output voltage command value is calculated using the detected power value of the power generation equipment and the detected power value of the power converter to control the power input and output by the power converter to a predetermined value. A power converter comprising: a converter control unit; and a unit configured to generate and output a pulse for controlling on / off of an element included in the power converter based on the output voltage command value. And a frequency control means for outputting a signal for correcting the active power command value so as to reduce the deviation between the frequency detection value and the frequency command value, and a correction value of the active power command value for the power converter. Active power Means for creating a corrected active power command value by adding or subtracting from the command value, and converter control means for controlling input / output active power of the power converter based on the corrected active power command value. A power converter characterized by the above-mentioned.
器と、前記電力系統に接続された負荷と、前記負荷の電
力を検出する手段と、前記電力変換器の入出力する電力
を検出する手段と、前記負荷の電力検出値と前記電力変
換器の電力検出値を用いて前記電力変換器が入出力する
電力を所定の値に制御するように出力電圧指令値を演算
する変換器制御手段と前記出力電圧指令値より前記電力
変換器を構成する素子のオンオフを制御するパルスを作
成し出力する手段とを備えた電力変換装置において、 変換器の連系点の電圧から周波数を検出する手段と、前
記周波数検出値と周波数指令値の偏差を小さくするよう
に有効電力指令値を補正する信号を出力する周波数制御
手段と、前記有効電力指令値の補正値を電力変換器の有
効電力指令値に加算または減算して補正した有効電力指
令値を作成する手段と、前記補正した有効電力指令値に
基づいて前記電力変換器の入出力有効電力を制御する変
換器制御手段とを備えたことを特徴とする電力変換装
置。2. A power system, a power converter connected to the power system, a load connected to the power system, means for detecting the power of the load, and detecting power input and output by the power converter. And a converter control for calculating an output voltage command value to control the power input and output by the power converter to a predetermined value using the detected power value of the load and the detected power value of the power converter. And a means for generating and outputting a pulse for controlling the on / off of the elements constituting the power converter from the output voltage command value, wherein a frequency is detected from a voltage at a connection point of the converter. Means, a frequency control means for outputting a signal for correcting the active power command value so as to reduce the deviation between the frequency detection value and the frequency command value, and a correction value of the active power command value for the active power command of the power converter. Add to value Or a means for creating a corrected active power command value by subtraction, and a converter control means for controlling the input / output active power of the power converter based on the corrected active power command value. Power converter.
補正値が零になるように、前記周波数指令値を調整する
手段を備えることを特徴とする電力変換装置。3. The device according to claim 1, further comprising a unit that adjusts the frequency command value so that a correction value of the active power command value output from the frequency control unit becomes zero. Power converter.
波数指令値に制限手段を備えることを特徴とする電力変
換装置。4. The power converter according to claim 3, further comprising a limiter for the frequency command value so that the frequency command value does not deviate from a predetermined value.
する周波数補正値に所定時定数のフィルタ手段を備える
ことを特徴とする電力変換装置。5. The power conversion apparatus according to claim 3, further comprising a filter unit having a predetermined time constant for a frequency correction value for adjusting the frequency so that the frequency command value does not suddenly change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000226191A JP4045724B2 (en) | 2000-07-21 | 2000-07-21 | Power converter equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000226191A JP4045724B2 (en) | 2000-07-21 | 2000-07-21 | Power converter equipment |
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| Publication Number | Publication Date |
|---|---|
| JP2002044867A true JP2002044867A (en) | 2002-02-08 |
| JP4045724B2 JP4045724B2 (en) | 2008-02-13 |
Family
ID=18719850
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|---|---|---|---|
| JP2000226191A Expired - Fee Related JP4045724B2 (en) | 2000-07-21 | 2000-07-21 | Power converter equipment |
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|---|---|
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