中频(400Hz)谐波监测及无功补偿综合装置的研究  

Intermediate frequency(400 Hz)harmonic detection and reactive compensation device

作　　者：郑谞[1] 张有兵[1] 周文委[1] 杨光豪[1] 冯亮 王新成[1] 

机构地区：[1]浙江工业大学信息工程学院,浙江杭州310023

出　　处：《机电工程》2013年第6期732-736,共5页Journal of Mechanical & Electrical Engineering

基　　金：国家自然科学基金资助项目(51207139);浙江省自然科学基金重点资助项目(Z1110893);浙江省自然科学基金资助项目(2011XZ003)

摘　　要：采用传统FFT算法对中频供电系统进行谐波分析时,很难实现同步采样和整周期截断,必然存在频谱泄露和栅栏效应,而且中频供电系统对无功补偿控制精度与灵敏度有较高要求。针对中频(400 Hz)供电系统存在谐波污染及有功输出不足等问题,将快速傅里叶算法(FFT)和动态无功补偿技术应用于中频供电系统谐波检测及无功补偿。提出了加汉宁窗双谱线插值快速傅里叶谐波检测算法和九区域动态无功补偿控制策略,并在Matlab中进行了研究分析。最后,搭建了整体运行调试平台,对中频无功补偿与谐波监测装置进行了模块测试与整机运行。分析结果表明,加汉宁窗插值快速傅里叶算法能够大幅度降低由非同步采样造成的误差;研究结果表明,该装置谐波含量的测量精度满足要求,无功补偿控制策略有效可行。It is very difficult to achieve synchronous sampling and integrated-cycle truncation when intermediate frequency power system harmonics were analyzed. Therefore there inevitably exists the spectral leakage and fence effect. In addition, intermediate frequency power system has higher requirements on the accuracy and sensitivity of reactive power compensation control. Aiming at the problems of harmonic pollution and the lack of active power output in intermediate frequency power system, fast Fourier transform（FFT）algorithm and dynamic reactive power compensation technology were applied to harmonic detection and reactive compensation device of intermediate frequency power system. The Hanning window interpolation FFT and nine-region dynamic reactive power compensation control strategy was put forward. Finally, the whole operation debugging platform was set up to test the reactive power compensation and harmonic detection modules of intermediate frequency power system. The simulation results on Matlab indicate that Hanning window interpolation FFF can greatly reduce the error of asynchronous sampling. The research results indicate that the measurement accuracy of the harmonic content of the equipment meets the requirements and reactive power compensation control strategy is feasible and effective.

关 键 词：中频供电系统 谐波污染 谐波监测 汉宁窗 双谱线插值 无功补偿 

分 类 号：TM761[电气工程—电力系统及自动化]