电力系统自动化
電力繫統自動化
전력계통자동화
AUTOMATION OF ELECTRIC POWER SYSTEMS
2012年
7期
92-98
,共7页
级联有源滤波器%静止无功补偿器%谐波预计算%综合控制%补偿优化
級聯有源濾波器%靜止無功補償器%諧波預計算%綜閤控製%補償優化
급련유원려파기%정지무공보상기%해파예계산%종합공제%보상우화
cascade active power filter%static var compensator%harmonic pre-calculation%universal control%optimal compensation
级联多电平有源滤波器（CS-APF）与静止无功补偿器（SVC）同时运行存在稳定性及无功补偿控制优化等问题。文中提出一种统一控制策略,结合SVC和CS-APF的功能特点,使SVC对负载正序无功分量及负序分量的补偿进行前馈控制和电网电纳（不包含CS-APF分量）反馈控制;CS-APF对晶闸管相控电抗器（TCR）与电网负载谐波的补偿进行前馈控制,并去除SVC中固定电容分量,进行电网电流反馈控制,同时对SVC无功补偿进行二次优化补偿。另外,提出一种TCR谐波电流预计算方法,根据TCR触发角当前值与电网电压锁相环相位,构建TCR谐波电流,实现对TCR谐波的预计算。仿真和实验研究表明,在该综合控制方案下,SVC与CS-APF控制不存在闭环,系统稳定性高,TCR谐波补偿无滞后,无功补偿响应较快,补偿能力强。
級聯多電平有源濾波器（CS-APF）與靜止無功補償器（SVC）同時運行存在穩定性及無功補償控製優化等問題。文中提齣一種統一控製策略,結閤SVC和CS-APF的功能特點,使SVC對負載正序無功分量及負序分量的補償進行前饋控製和電網電納（不包含CS-APF分量）反饋控製;CS-APF對晶閘管相控電抗器（TCR）與電網負載諧波的補償進行前饋控製,併去除SVC中固定電容分量,進行電網電流反饋控製,同時對SVC無功補償進行二次優化補償。另外,提齣一種TCR諧波電流預計算方法,根據TCR觸髮角噹前值與電網電壓鎖相環相位,構建TCR諧波電流,實現對TCR諧波的預計算。倣真和實驗研究錶明,在該綜閤控製方案下,SVC與CS-APF控製不存在閉環,繫統穩定性高,TCR諧波補償無滯後,無功補償響應較快,補償能力彊。
급련다전평유원려파기（CS-APF）여정지무공보상기（SVC）동시운행존재은정성급무공보상공제우화등문제。문중제출일충통일공제책략,결합SVC화CS-APF적공능특점,사SVC대부재정서무공분량급부서분량적보상진행전궤공제화전망전납（불포함CS-APF분량）반궤공제;CS-APF대정갑관상공전항기（TCR）여전망부재해파적보상진행전궤공제,병거제SVC중고정전용분량,진행전망전류반궤공제,동시대SVC무공보상진행이차우화보상。령외,제출일충TCR해파전류예계산방법,근거TCR촉발각당전치여전망전압쇄상배상위,구건TCR해파전류,실현대TCR해파적예계산。방진화실험연구표명,재해종합공제방안하,SVC여CS-APF공제불존재폐배,계통은정성고,TCR해파보상무체후,무공보상향응교쾌,보상능력강。
How to keep system stability and optimize var compensation capability is the key issue in the combined system based on cascade multilevel active power filter（CS-APF） and static var compensator（SVC）.A universal control strategy is proposed for the combined system.For the SVC,a feed forward control for the compensation of positive sequence reactive component and negative sequence component of the load is adopted.The network susceptance（with no components of CS-APF） feedback control is applied to decrease the compensation error.For the CS-APF control,a feed forward control of harmonic compensation for thyristor control reactor（TCR） and the load is applied.The network harmonic current feedback control is applied to decrease the compensation error.The fixed capacitor（in SVC） current component is removed from the network current feedback control loop of CS-APF to improve the stability of the combined system.The var compensation capability of CS-APF is enabled to optimize the performance of SVC.Moreover,a novel pre-calculation method for the TCR harmonic current detection is proposed.According to the triggering angle of the thyristor in TCR and the network voltage phase,the harmonic current is constructed with no time delay.Finally,the simulation and experimental results show that： 1）the system stability is high without closed loop between the control of CS-APF and SVC;2）the real-time harmonic compensation of TCR is realized;3）the system responsibility is quick;and 4）the capability of var compensation of SVC is improved.
