Real-Time Power Regulation of Flexible User-Side Resources in Distribution Networks via Dual Ascent Method

Yu Yang, Fushuan Wen (), Jiajia Yang (), Hangyue Liu, Dazheng Liu, Shujun Xin, Hao Fan and Cong Wu
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Yu Yang: College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Fushuan Wen: College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Jiajia Yang: College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Hangyue Liu: Sungrow Australia Group Pty. Ltd., Sydney 2060, Australia
Dazheng Liu: China Energy Economic and Technological Research Institute Co., Ltd., Beijing 102299, China
Shujun Xin: State Grid Corporation of China, Beijing 100031, China
Hao Fan: State Grid Corporation of China, Beijing 100031, China
Cong Wu: State Grid Energy Research Institute of China, Beijing 102209, China

Energies, 2024, vol. 17, issue 19, 1-14

Abstract: Flexible user-side resources are of great potential in providing power regulation so as to effectively address the challenges of reverse power flow and overvoltage issues in distribution networks characterized by high photovoltaic (PV) penetration. However, existing distributed algorithms typically implement control signals after the convergence of the algorithms, making it difficult to track frequent and rapid fluctuations in PV power outputs in real time. Given this background, an online-distributed control algorithm for the real-time power regulation of flexible user-side resources is proposed in this paper. The objective of the established control model is to minimize network losses by dynamically adjusting active power outputs of flexible user-side resources and reactive power outputs of PV inverters while respecting branch power flow and voltage magnitude constraints. Furthermore, by deconstructing the centralized problem into a primal–dual one, a distributed control strategy based on the dual ascent method is implemented. With the proposed method, agents can achieve global optimality by exchanging limited information with their neighbors. The simulation results verify the good balance between economic efficiency and voltage control performance of the proposed method.

Keywords: power regulation; voltage control; flexible user-side resource; distributed algorithm; dual ascent method (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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