摘要
目前,关于单周控制理论(OCC)的研究一般仅以数学计算的方式给出OCC有源电力滤波器(APF)的控制方程,未阐明其物理意义,且用比例积分(PI)调节器的输出电压Um反映负载大小的合理性仍需论证。分别对纯阻性负载和非线性负载情况下OCCAPF的电路工作状态进行了详细分析。在此基础上给出了PI调节器中P和I环节的物理意义及其应满足的条件,发现可将其作用分开:I环节主导Um长期内较大的变动,用来反映负载大小的改变;P环节每个工频周期内对Um小范围调整,用来平衡每个工频周期内负载存在的谐波。讨论了PI调节器的参数设计,并具体描述了P参数的计算方法。仿真结果证实了该设计方法的合理性。
Most of papers about OCC（One-Cycle Control） only give the control equation by mathematic deduction,the physical meaning is not introduced,and why the output voltage Um of PI （Proportional- Integral） controller can reflect changes of load is still need deducted. The detailed steady state process of OCC APF（Active Power Filter） with both resistive load and nonlinear load is analyzed ,based on which the physical meaning and steady condition of proportional part and integral part in PI controller are given. Proportional part and integral part have different functions：integral part dominates the big alteration of Um in long term,and it reflects load fluctuating;proportional part rectifies Um in a small extent and eliminates the harmonic current in each line cycle. The parameter design of PI controller is discussed and the design method of P parameter is given. Simulation results prove the rationality of the design method.
出处
《电力自动化设备》
EI
CSCD
北大核心
2006年第9期39-42,50,共5页
Electric Power Automation Equipment
