参数失谐对基于滤波器的高压直流输电系统直流侧谐波电压测量的影响  

Influence of parameter mismatch on filter-based harmonic voltage measuring for DC side of HVDC transmission system

作　　者：毛涛[1] 乐健[1] 黄银龙 罗汉武[2] 

机构地区：[1]武汉大学电气工程学院,湖北武汉430072 [2]内蒙古东部电力有限公司,内蒙古呼和浩特010020

出　　处：《电力自动化设备》2015年第12期95-100,共6页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51007065)~~

摘　　要：将测量的高压直流输电系统直流侧滤波器电流进行傅里叶分解得到各次谐波电流,结合滤波器已知的阻抗-频率特性计算得到直流侧的谐波电压。推导了采用常规直流单调谐滤波器时谐波电压测量误差与参数失谐度之间的关系,分析了不同元件的失谐度对各次谐波电压测量的影响和谐波电压测量误差对滤波器元件参数失谐的灵敏度。仿真计算结果验证了所提方法的正确性和有效性。Fourier decomposition is applied to the DC-side filter current measurements of HVDC transmission system to obtain the harmonic currents of different orders and the impendence-frequency characteristics of the filter is adopted to calculate the corresponding harmonic voltages. The relationship between the error of harmonic voltage measurements and the parameter mismatch is deduced for the normal single-tuned filter,and the effect of detuning degree on the harmonic voltage measurement is analyzed for different elements,as well as the sensitivity of harmonic voltage measuring error to the filter parameter mismatch. The results of simulative calculation show the correctness and effectiveness of the proposed method.

关 键 词：滤波器 直流滤波器 谐波电压测量 高压直流输电 灵敏度分析 参数失谐 

分 类 号：TM72[电气工程—电力系统及自动化]