电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
POWER SYSTM PROTECTION AND CONTROL
2015年
8期
69-73
,共5页
电压型变换器%模糊控制%滞环空间矢量控制%谐波总畸变率(THD)%开关状态
電壓型變換器%模糊控製%滯環空間矢量控製%諧波總畸變率(THD)%開關狀態
전압형변환기%모호공제%체배공간시량공제%해파총기변솔(THD)%개관상태
three-phase voltage source converter%fuzzy control%hysteresis space vector control%total harmonic distortion (THD)%switching state
采用滞环空间矢量控制的三相电压型变换器电压外环调节主要依赖于传统比例积分(PI)调节器，所以当系统状态或者自身参数变化时，将难以使系统获得满意的动态性能。针对该问题，在电压外环引入模糊PI调节器，根据工程经验在线调整P、I参数，以应对系统变化。同时给出电流内环滞环空间矢量控制中开关状态的选择原则。仿真和实验结果表明，所提控制策略能够有效保证系统稳态性。此外，与采用传统PI调节器的滞环空间矢量控制策略的对比结果表明，所提控制策略可以将变换器的暂态响应时间减少55%以上，使系统获得更为出色的暂态性能。
採用滯環空間矢量控製的三相電壓型變換器電壓外環調節主要依賴于傳統比例積分(PI)調節器，所以噹繫統狀態或者自身參數變化時，將難以使繫統穫得滿意的動態性能。針對該問題，在電壓外環引入模糊PI調節器，根據工程經驗在線調整P、I參數，以應對繫統變化。同時給齣電流內環滯環空間矢量控製中開關狀態的選擇原則。倣真和實驗結果錶明，所提控製策略能夠有效保證繫統穩態性。此外，與採用傳統PI調節器的滯環空間矢量控製策略的對比結果錶明，所提控製策略可以將變換器的暫態響應時間減少55%以上，使繫統穫得更為齣色的暫態性能。
채용체배공간시량공제적삼상전압형변환기전압외배조절주요의뢰우전통비례적분(PI)조절기，소이당계통상태혹자자신삼수변화시，장난이사계통획득만의적동태성능。침대해문제，재전압외배인입모호PI조절기，근거공정경험재선조정P、I삼수，이응대계통변화。동시급출전류내배체배공간시량공제중개관상태적선택원칙。방진화실험결과표명，소제공제책략능구유효보증계통은태성。차외，여채용전통PI조절기적체배공간시량공제책략적대비결과표명，소제공제책략가이장변환기적잠태향응시간감소55%이상，사계통획득경위출색적잠태성능。
It is difficult for the classical proportional-integral (PI) regulator employed in the outer voltage loop to satisfy the system performance requirement, when the system states or its parameters are changed in the three-phase voltage source converter using the hysteresis space vector control. The fuzzy based PI regulator is therefore introduced. The coefficients of P and I are adjusted online based on the engineering experience to deal with the system change. A hysteresis space vector control is adopted in the inner current loop. Its principle for selecting the switching states is provided. Finally, the simulation and experiment results show that, the proposed control method can guarantee the system stability effectively. Moreover, compared with the hysteresis space vector control with the classical PI regulator, the proposed control method can reduce the transient setting time more than 55% and ensure the better transient performance.
