电力系统自动化
電力繫統自動化
전력계통자동화
AUTOMATION OF ELECTRIC POWER SYSTEMS
2014年
21期
58-65
,共8页
徐榕%于泳%于雁南%杨荣峰%徐殿国
徐榕%于泳%于雁南%楊榮峰%徐殿國
서용%우영%우안남%양영봉%서전국
H 桥级联%静止同步补偿器%无差拍控制%离散状态观测器%电流预测%离散滑模观测器
H 橋級聯%靜止同步補償器%無差拍控製%離散狀態觀測器%電流預測%離散滑模觀測器
H 교급련%정지동보보상기%무차박공제%리산상태관측기%전류예측%리산활모관측기
H-bridge cascaded%static synchronous compensator (STATCOM)%dead-beat control%discrete state observer%current prediction%discrete sliding form observer
H 桥级联静止同步补偿器(STATCOM)以其损耗低、响应快速、储能元件体积小和输出电流谐波含量低等优点，成为动态无功补偿装置发展的重要方向。通过对 STATCOM工作原理及数学模型的分析，推导出无差拍控制算法。为了提高无差拍控制算法的实时性，消除参考电压滞后一拍的影响和抑制STATCOM输出电流的谐波，构造离散状态观测器对系统参考指令电流进行预测。构造离散滑模观测器对 STATCOM实际输出电压进行观测，避免了通过直流侧电容电压参考值计算STATCOM实际输出电压的误差。仿真与实验结果表明，该算法可以精确地预测参考指令电流，进而提高了STATCOM无差拍控制的性能。
H 橋級聯靜止同步補償器(STATCOM)以其損耗低、響應快速、儲能元件體積小和輸齣電流諧波含量低等優點，成為動態無功補償裝置髮展的重要方嚮。通過對 STATCOM工作原理及數學模型的分析，推導齣無差拍控製算法。為瞭提高無差拍控製算法的實時性，消除參攷電壓滯後一拍的影響和抑製STATCOM輸齣電流的諧波，構造離散狀態觀測器對繫統參攷指令電流進行預測。構造離散滑模觀測器對 STATCOM實際輸齣電壓進行觀測，避免瞭通過直流側電容電壓參攷值計算STATCOM實際輸齣電壓的誤差。倣真與實驗結果錶明，該算法可以精確地預測參攷指令電流，進而提高瞭STATCOM無差拍控製的性能。
H 교급련정지동보보상기(STATCOM)이기손모저、향응쾌속、저능원건체적소화수출전류해파함량저등우점，성위동태무공보상장치발전적중요방향。통과대 STATCOM공작원리급수학모형적분석，추도출무차박공제산법。위료제고무차박공제산법적실시성，소제삼고전압체후일박적영향화억제STATCOM수출전류적해파，구조리산상태관측기대계통삼고지령전류진행예측。구조리산활모관측기대 STATCOM실제수출전압진행관측，피면료통과직류측전용전압삼고치계산STATCOM실제수출전압적오차。방진여실험결과표명，해산법가이정학지예측삼고지령전류，진이제고료STATCOM무차박공제적성능。
With such advantages as low loss,fast dynamic response,small size and low harmonic content,the H-bridge cascaded synchronous compensator (STATCOM) has become an important development direction of the dynamic reactive power compensation equipment.In this paper,the dead-beat control algorithm is deduced via an analysis of the working principle and mathematical model for the STATCOM.To improve the real-time character of the dead-beat control algorithm, eliminate the influence of the reference voltage lag by one beat and reduce the current harmonic content of the STATCOM,a discrete state observer is constructed which can be used to predict the value of the reference command current.To avoid the error of the STATCOM actual output voltage which can be calculated by the dc side reference voltage of capacitance,the discrete sliding form observer is constructed which can be used to observe the actual output voltage of the STATCOM. Simulation and experimental results show that the algorithm can accurately predict the value of reference command current to improve the dead-beat control performance of the STATCOM.
