摘要
提出一种将同步相量测量单元(PMU)的直接电压相量量测变换为间接支路电流量测,并与监控与数据采集(SCADA)量测量一起进行混合迭代的非线性状态估计方法。对构造等效电流修正量而带来的间接量测误差进行了详细和定量的分析,并对该混合估计算法的精度进行了定性分析和定量计算。理论分析和算例表明,该方法可以获得较高的估计精度,在收敛次数和滤波效果上也有所改进。
A new method for hybrid non-linear state estimation with phasor measurement unit （PMU） is proposed, in which the direct voltage phasor measurement is transformed into indirect equivalent branch current measurement to conduct the hybrid iteration with SCADA measurement. The indirect measurement errors caused by constructing the equivalent current modification are also analyzed and calculated in detail. The accuracy of the hybrid estimation algorithm is analyzed qualitatively and calculated quantitatively. The theoretic analysis and simulation results demonstrate that the proposed method has higher estimation precision and better performance in convergence time and filtering effect.
出处
《电力系统自动化》
EI
CSCD
北大核心
2007年第4期28-32,共5页
Automation of Electric Power Systems
基金
国家自然科学基金资助项目(50607005)
教育部科学技术研究重点项目(106052)
新世纪优秀人才支持计划(NCET-05-0216)
长江学者和创新团队发展计划(IRT0515)。
关键词
相量测量单元
量测变换
混合量测
状态估计
电力系统
phasor measurement unit
measurement transforming
hybrid measurement
state estimation
power systems
