电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
Power System Protection and Control
2015年
19期
89-94
,共6页
沈健%周斌%汪昀%张道农%侯明国%张敏%檀永%相蓉
瀋健%週斌%汪昀%張道農%侯明國%張敏%檀永%相蓉
침건%주빈%왕윤%장도농%후명국%장민%단영%상용
同步相量测量%同步相量测量装置(PMU)%离散傅里叶变换(DFT)%动态性能%数字滤波器
同步相量測量%同步相量測量裝置(PMU)%離散傅裏葉變換(DFT)%動態性能%數字濾波器
동보상량측량%동보상량측량장치(PMU)%리산부리협변환(DFT)%동태성능%수자려파기
synchrophasor measurement%phasor measurement unit (PMU)%discrete Fourier transformation (DFT)%dynamic performance%digital filter
为了提高PMU装置在电力系统动态条件下的同步相量测量精度,研究了若干提升PMU装置动态测量性能的方法.采用IEEE C37.118标准中推荐的基于离散傅里叶变换(DFT)的同步相量计算模型,对基于DFT的相量测量算法进行了改进.分析了该改进方法在带外干扰、系统振荡、系统失步、短路或断线故障等动态条件下的特性.设计了等纹波滤波器对相量数据进行滤波处理,保证同步相量的测量精度,最后在PMU装置中实现并进行了测试验证.实验结果表明,通过上述方法的实施,PMU在动态条件下的测量精度得到了提高.
為瞭提高PMU裝置在電力繫統動態條件下的同步相量測量精度,研究瞭若榦提升PMU裝置動態測量性能的方法.採用IEEE C37.118標準中推薦的基于離散傅裏葉變換(DFT)的同步相量計算模型,對基于DFT的相量測量算法進行瞭改進.分析瞭該改進方法在帶外榦擾、繫統振盪、繫統失步、短路或斷線故障等動態條件下的特性.設計瞭等紋波濾波器對相量數據進行濾波處理,保證同步相量的測量精度,最後在PMU裝置中實現併進行瞭測試驗證.實驗結果錶明,通過上述方法的實施,PMU在動態條件下的測量精度得到瞭提高.
위료제고PMU장치재전력계통동태조건하적동보상량측량정도,연구료약간제승PMU장치동태측량성능적방법.채용IEEE C37.118표준중추천적기우리산부리협변환(DFT)적동보상량계산모형,대기우DFT적상량측량산법진행료개진.분석료해개진방법재대외간우、계통진탕、계통실보、단로혹단선고장등동태조건하적특성.설계료등문파려파기대상량수거진행려파처리,보증동보상량적측량정도,최후재PMU장치중실현병진행료측시험증.실험결과표명,통과상술방법적실시,PMU재동태조건하적측량정도득도료제고.
For improving the synchronized phasor measuring accuracy of phasor measurement unit (PMU) in condition of power system dynamic transition, methods for improving PMU's dynamic performance are researched. Phasor estimation model recommended in IEEE C37.118 which is based on Discrete Fourier Transformation (DFT) algorithm is used. Phasor measurement method based on DFT is improved and its characteristic is analyzed under out-of-band interference, oscillation, out-of-step, and short-circuit fault conditions. Equiripple filter is designed to process phasor data for ensuring synchronized phasor measuring accuracy. Finally, methods are realized in PMU and the test is carried out to verify the methods used. Synchrophasor measurement accuracy under dynamic processes is improved with the methods applied.
