Design and Application of Photovoltaic Energy Storage DC Technology In Municipal Stormwater Detention Tank System

In order to effectively promote the goals of China's dual carbon strategy, accomplish energy conservation and carbon reduction in municipal infrastructure, and harness the potential of renewable energy sources, this paper presents a novel direct current (DC) power supply system for municipal stormwater detention tank (SDT) based on photovoltaic energy storage DC technology. The paper provides the fundamental design principles and methods of this system. In this study, an analysis is initially conducted on the current state, operational characteristics, energy consumption features of the power supply systems for municipal SDT, as well as the advantages of applying photovoltaic energy storage DC technology in municipal infrastructure systems. Furthermore, taking into consideration the operational characteristics specific to municipal SDT, we propose a robust DC power supply system integrating photovoltaic and energy storage technologies. In addition, we present the design methodology for this system, encompassing crucial aspects such as system architecture design, voltage level determination, and capacity matching calculations, among others. This system facilitates direct utilization of photovoltaic energy to power the variable frequency load of the SDT, eliminating the need for conversion and rectification processes. Consequently, it significantly enhances both the utilization rate of renewable energy and the overall system efficiency. Moreover, this approach also amplifies the safety of system operation. Furthermore, in response to the operational requirements of municipal SDT, a meticulously crafted operational control strategy was devised for the system. Ultimately, through the construction of a physical DC power supply and consumption system, comprehensive testing and verification were conducted to assess the effectiveness and reliability of the system designed in this paper and its corresponding operational control strategy.