摘要
提出了一种基于等式方程直接求解的支路参数抗差估计方法。首先基于输电线路和双绕组变压器两端相量测量单元(phasor measurement unit,PMU)或监控与数据采集(supervisory control and data acquisition,SCADA)装置的单时段量测信息,推导了直接求解支路参数的等式方程。然后借鉴文献[18]三绕组变压器参数的抗差估计方法,计算支路参数的多时段均值并以其作为最终的参数估计值。由于采用等式方程直接求解支路参数,计算公式简单直观且避免了传统方法的数值稳定性问题,因此该方法更加实用有效。基于IEEE 39系统的算例验证了文中方法的有效性。
A method to estimate branch paramters based on direct solution of equations is proposed. Firstly, based on the single time-interval data of transmission line and two-winding transformer measured by phasor measurement unit （PMU） or surpervisory control and data acquisition （SCADA）, the equations by which branch paramters can be directly solved is dirived; then referring to the parameter estimation method for three-winding transformer presented given by Ref. 18, the multi time-interval average values of branch parameters are calculated taking the calculation values as the final parameter estimation values. Because branch parameters are directly solved by equations, the calculation formulate are simple and intuitional, and the problem of numerical stability in traditional methods can be avoided, thus the proposed method is practicable and effecitve. The effectiveness of the proposed method is verified by calculation results of IEEE 39-bus system.
出处
《电网技术》
EI
CSCD
北大核心
2012年第6期127-132,共6页
Power System Technology
关键词
电力系统
输电线路
双绕组变压器
参数估计
相量测量单元
监控与数据采集(SCADA)系统
power system
transmission line
two-windingtransformer
parameter estimation
phasor measurement unit（PMU）
surpervisory control and data acquisition （SCADA）
