Reactive Power Optimization Control Strategy of AC Weak Grid Considering Small Hydro-Power Access

• Published in: 2023 IEEE International Conference on Advanced Power System Automation and Protection (APAP) pp. 344 - 350
• Main Authors: Yan, Qunmin, Ma, Ruiqing, Zhu, Juanjuan, An, Chen
• Format: Conference Proceeding
• Language: English
• Published: IEEE 08.10.2023
• Subjects: Distribution networks; Fluctuations; Improved Bat-Algorithm (IBA); Memory management; over-voltage; Pareto; Pareto optimization; Reactive power; Reactive power control; reactive power optimization; Voltage fluctuations; weak grid connection
• DOI: 10.1109/APAP59666.2023.10348441

Aiming at the problems of voltage fluctuations in distribution network and power quality caused by the large-scale access of small hydro-power under weak grid conditions, a reactive power optimization control strategy was proposed. Based on the analysis of the operating characteristics of small hydro-power, especially the voltage characteristics, a multi-objective reactive power control model of distribution network of small hydro-power was established. Combined with the improved Bat-Algorithm, to avoid the algorithm falling into local optimization, probabilistic elite pool disturbance strategy was introduced, by setting up the external storage device and using the phasing-out mechanism to sort the crowded distance of the calculated target value, and the Pareto optimal solution set of the model was finally obtained. Through the application of IEEE33 node system for simulation, test results show that the optimization control strategy can effectively solve the problems of network loss optimization and voltage fluctuations. The proposed method has theoretical and practical significance for the control operation of distribution networks containing distributed small hydro-power.