State estimation of electrical power systems based on optimal deployment of PMU considering contingencies

IF 0.3 4区工程技术 Q4 ENGINEERING, MULTIDISCIPLINARY

Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria Pub Date : 2022-01-01 DOI:10.23967/j.rimni.2022.03.010

G. Morocho, D. Carrión

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引用次数: 0

Abstract

The present research proposes to design and apply a state estimator algorithm in electrical power systems, applying the Weighted Least Squares methodology, through a process called non-linear hybrid estimator, the same one that uses measurements from PMUs and conventional measurements. in addition, to find the optimal PMU locations respecting the observability and redundancy restrictions for the Electric Power Systems, through mixed integer linear programming, considering the N-1 contingencies in the SEP. The proposed state estimator is adjusted to the measurements obtained, in the presence of contingencies in the SEP. The simulations obtained as a result of the implementation of the hybrid state estimator show that the proposal improves the precision of the estimator and the speed of convergence, considering the minimum error of system measurements and the number of PMUs placed in the Power System, after a contingency occurs, which may be the departure of a PMU or the loss of one of the transmission lines of the SEP.

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考虑突发事件的PMU优化部署电力系统状态估计

本研究提出在电力系统中设计并应用一种状态估计器算法，该算法采用加权最小二乘方法，通过一种称为非线性混合估计器的过程，该过程使用pmu和常规测量的测量值。此外，考虑SEP中N-1的偶然性，通过混合整数线性规划，考虑电力系统的可观测性和冗余性限制，找到最优PMU位置。实现该混合状态估计器的仿真结果表明，在发生意外事件(可能是PMU偏离或SEP的一条传输线丢失)时，考虑到系统测量误差最小和放置在电力系统中的PMU数量，该方法提高了估计器的精度和收敛速度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria 工程技术-工程：综合

CiteScore

0.70

自引率

0.00%

发文量

审稿时长

6 months

期刊介绍： International Journal of Numerical Methods for Calculation and Design in Engineering (RIMNI) contributes to the spread of theoretical advances and practical applications of numerical methods in engineering and other applied sciences. RIMNI publishes articles written in Spanish, Portuguese and English. The scope of the journal includes mathematical and numerical models of engineering problems, development and application of numerical methods, advances in software, computer design innovations, educational aspects of numerical methods, etc. RIMNI is an essential source of information for scientifics and engineers in numerical methods theory and applications. RIMNI contributes to the interdisciplinar exchange and thus shortens the distance between theoretical developments and practical applications.