An optimal placement of phasor measurement unit using new sensitivity indices

K Khalid,M H M Zaman,A A Ibrahim,N A M Kamari

doi:10.11591/eei.v10i1.2499

K Khalid, M H M Zaman + Show 2 more

Open Access

https://doi.org/10.11591/eei.v10i1.2499

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Abstract

This paper presents an alternative approach to solve an optimal phasor measurement unit (PMU) placement by introducing two new sensitivity indices. The indices are constructed from the information measured from PMUs such as voltage magnitude and angle. These two parameters are essential for power system stability assessment and control. Therefore, fault analysis is carried out to obtain the voltage magnitude and angle deviations at all buses in order to construct the indices. An exhaustive search method is used to solve the linear integer programming problem where all possible combinations of PMU placement are evaluated to obtain the optimal solution. Unfortunately, the traditional objective function to minimize the total number of PMU placement leads to multiple solutions. The indices can be used to assess multiple solutions of PMU placement from the exhaustive method. In this work, an optimal solution is selected based on the performance of PMU placement in according to the indices. The proposed method is tested on the IEEE 14 bus test system. Only four PMUs are required to monitor the whole test system. However, the number of PMUs can be reduced to three PMUs after applying zero injection bus elimination.

Highlights

Power system failures and fault occurrence are unpredictable due to the revolution of complex network growth and uncertain nature catastrophic
35 the exhaustive search method to find the minimum number of Phasor measurement unit (PMU) installation while maintaining full observability of the power network
This paper presents new sensivity indices to select the best solution from the multiple possible solutions obtained from the exhaustive search method based on the conventional objective function to minimize the total number of PMU placement in power networks

Summary

INTRODUCTION

Power system failures and fault occurrence are unpredictable due to the revolution of complex network growth and uncertain nature catastrophic. The redundancy index in OPP is used as indicator to decide the best combination from several feasible PMU placement solutions. An alternative method to select the best solution is suggested by using new indices that consider potential parameters for system stability assessment. The fault events will affect the operating network parameters such as voltage magnitudes and angles. They are important to be considered for the PMU placement that can be used for remedial actions in preventing any power interupptions [25]. Voltage magnitude and angle are considered as new benchmark indices to solve the OPP problem

OPTIMAL PMU PLACEMENT FORMULATION

RESULTS AND DISCUSSION

CONCLUSION