A PMU-Based Method for On-Line Thévenin Equivalent Estimation
A PMU-Based Method for On-Line Thévenin Equivalent Estimation
复制标题
基于PMU的戴维南当量在线估计方法
DOI：
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发表时间：
2022
影响因子：
6.6
通讯作者：
F. Milano
中科院分区：
文献类型：
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作者：
Pourya Abdi;Mohamad;Hassan Haes Alhelou;F. Milano
提出了一种只需要当前相量就能在线估计thsamvenin当量（TE）的方法。该技术基于广域测量，包括系统负载和同步发电机的电压和电流相量，因此它可以同时从感兴趣的母线上估计系统的TE。这项技术有两个主要步骤。第一步，将常规阻抗矩阵<inline-formula>< text -math notation="LaTeX">$ar{Z}_{
m bus}$</ text -math></inline-formula>修改为适合TE估计。第二步，利用连续两次相量测量计算的灵敏度理论修正系数，对<inline-formula>< text -math符号="LaTeX">$ar{Z}_{
m bus}$</ text -math></inline-formula>矩阵的对角线项进行修正。在IEEE 39总线和118总线测试系统上进行的仿真结果表明，所提出的技术可以准确地估计在任何负载增加情况下的发电和消耗总线的TE。对比场景验证了所提技术相对于其他技术的优越性。
The paper proposes a technique for the on-line estimation of Thévenin equivalent (TE) which only needs the present phasor measurements. The technique is based on the wide-area measurements including voltage and current phasors of the system loads and synchronous generators, so that it can simultaneously estimate TE of the system seen from the interested buses. The technique has two main steps. In the first step, the conventional impedance matrix <inline-formula><tex-math notation="LaTeX">$ar{Z}_{
m bus}$</tex-math></inline-formula> is modified to be suitable for TE estimation. In the second step, a correction coefficient based on the sensitivity theory calculated by using two consecutive phasor measurements is applied to correct the diagonal terms of the <inline-formula><tex-math notation="LaTeX">$ar{Z}_{
m bus}$</tex-math></inline-formula> matrix. Simulation results carried on the IEEE 39-bus and 118-bus test systems show that the proposed technique can accurately estimate the TE for both generation and consumption buses under any load-increase scenario. The comparison scenarios verify the superiority of the proposed technique over others.