有源滤波过采样数字滞环电流跟踪控制方法

发布时间：2018-06-09 03:54

本文选题：有源电力滤波器 + 滞环电流控制　；参考：《电力系统自动化》2014年06期

【摘要】：以改善谐波补偿精度和稳定开关频率为目标,提出一种有源电力滤波器(APF)滞环电流跟踪控制的过采样数字实现方法。该方法利用数字芯片过采样下抽取因子的不同,满足各个控制运算模块对动态响应的不同需求;充分配合利用数字信号处理器(DSP)的2种运算方式———采样中断运算和主循环运算,保证补偿量检测的实时性和补偿电流的同步性;对同一指令量进行N次滞环跟踪,功率开关器件的状态切换只依赖于上一开关周期参数,在稳定开关频率的前提下,具有高精度电流跟踪控制能力。与传统滞环实现方法相比较,所提出的过采样数字实现方法,既克服了开关频率不固定的缺陷,也提高了谐波补偿精度,具有很好的实用性和可靠性。通过搭建65kVA三相三线APF工业样机,分析和验证了所提方法的有效性。
[Abstract]:Aiming at improving the accuracy of harmonic compensation and stabilizing switching frequency, a digital over-sampling method for hysteresis current tracking control of active power filter (APF) is proposed. This method uses the different decimation factors under the digital chip over-sampling to satisfy the different demands of each control operation module to the dynamic response. In order to ensure the real-time detection of compensation quantity and the synchronization of compensation current, the two operation modes of digital signal processor (DSP), sampling interrupt operation and main cycle operation, can be used to track the same instruction quantity for N times hysteresis loop. The state switching of power switching devices only depends on the parameters of the previous switching cycle, and it has high precision current tracking control capability under the premise of stabilizing the switching frequency. Compared with the traditional hysteretic realization method, the oversampling digital realization method not only overcomes the defect of the switching frequency, but also improves the harmonic compensation accuracy, and has good practicability and reliability. The effectiveness of the proposed method is analyzed and verified by setting up an industrial prototype of 65 kVA three-phase three-wire APF.
【作者单位】：东南大学电气工程学院;
【分类号】：TM46;TN713.8

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