摘要
提出一种基于阻抗约束的公共连接点(PCC)主谐波源溯源方法。根据系统侧阻抗和用户侧阻抗固有特征,结合PCC处谐波电压电流测量信息,采用相量投影法判断系统侧的主谐波源,利用严格不等式制约判断用户侧的主谐波源。对于两侧阻抗性质不同的更复杂情况,采用几何学余弦定理和严格不等式追溯主谐波源,并从谐波源幅值大小和矢量关系加以验证。利用置信区间去除异常测量数据,对多场景实测数据进行谐波溯源分析,结果表明了文中方法的有效性。
Based on the impedance constraints, a new method is proposed to trace the main harmonic source at the point of common coupling（ PCC）. According to the inherent features of utility and customer impedances and combining with the recorded harmonic voltages and currents at PCC, the vector projection technique is used for judging the main harmonic source of the utility side. Also, the strict inequality constraints are applied to determine the main harmonic source of the customer side. Besides, as for the more complex conditions where the properties of the utility and customer impedances are different, the main harmonic source is traced by the cosine law of geometry and strict inequality. Based on the magnitude and phasor relations of harmonic sources on the two sides, the impedance constraints are worked out. Furthermore, the confidence interval is employed to remove the abnormal monitoring data. The harmonic traceability calculation of multi-scene measured data demonstrates the validity of the proposed method.
作者
王智琦
杨洪耕
肖楚鹏
冷月
WANG Zhiqi YANG Honggeng XIAO Chupeng LENG Yue(School of Electrical Engineering and Information, Sichuan University, Chengdu 610065, China NARI Group Corporation （State Grid Electric Power Research Institute）, Nanjing 211106, China NARI （Wuhan） Equipment ＆ Engineering Efficiency Evaluation Center, Wuhan 430074, China)
出处
《电力系统自动化》
EI
CSCD
北大核心
2016年第21期182-188,共7页
Automation of Electric Power Systems
基金
国家自然科学基金资助项目(51477105)
国家电网公司科技项目"电能质量责任定量评估原则与计算方法的基础理论研究"~~
关键词
谐波溯源
谐波贡献度
功率方向
阻抗约束
置信区间
harmonic traceability
harmonic contribution
power direction
impedance constraint
confidence interval
