A new method for hybrid non-linear state estimation with PMU

作者：Qin Xiaohui^*; Bi Tianshu; Yang Qixun

来源：Automation of Electric Power Systems, 2007, 31(4): 28-32.

DOI：10.3321/j.issn:1000-1026.2007.04.006

• Branch current measurement
• Equivalent current modification
• Hybrid estimation algorithm
• Hybrid measurement
• Measurement transforming
• Phasor measurement unit (PMU)

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.

• 出版日期2007
• 单位华北电力大学