4.5 Article

Optimal Placement of PMU to Enhance Supervised Learning-Based Pseudo-Measurement Modelling Accuracy in Distribution Network

Journal

ENERGIES
Volume 14, Issue 22, Pages -

Publisher

MDPI
DOI: 10.3390/en14227767

Keywords

metaheuristic algorithms; optimal placement; phasor measurement units (PMU); pseudo-measurement; state estimation

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Funding

  1. Energy Technology Evaluation and Planning(KETEP) [20204010600340]
  2. Korea Evaluation Institute of Industrial Technology (KEIT) [20204010600340] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

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This paper presents a framework for optimal placement of PMUs in a distribution network using metaheuristic algorithms. The results of the optimal PMU placement showed superior performance in state estimation compared to load profile-based pseudo-measurements.
This paper introduces a framework for optimal placement (OP) of phasor measurement units (PMUs) using metaheuristic algorithms in a distribution network. The voltage magnitude and phase angle obtained from PMUs were selected as the input variables for supervised learning-based pseudo-measurement modeling that outputs the voltage magnitude and phase angle of the unmeasured buses. For three, four, and five PMU installations, the metaheuristic algorithms explored 2000 combinations, corresponding to 40.32%, 5.56%, and 0.99% of all placement combinations in the 33-bus system and 3.99%, 0.25%, and 0.02% in the 69-bus system, respectively. Two metaheuristic algorithms, a genetic algorithm and particle swarm optimization, were applied; the results of the techniques were compared to random search and brute-force algorithms. Subsequently, the effects of pseudo-measurements based on optimal PMU placement were verified by state estimation. The state estimation results were compared among the pseudo-measurements generated by the optimal PMU placement, worst PMU placement, and load profile (LP). State estimation results based on OP were superior to those of LP-based pseudo-measurements. However, when pseudo-measurements based on the worst placement were used as state variables, the results were inferior to those obtained using the LP.

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