Research on energy efficiency management method of AC/DC hybrid distribution system

Abstract

With the increasingly serious problems of fossil energy crisis and environmental pollution, vigorous development of Distributed Renewable Energy has become an important means of energy structure reform and energy consumption transformation. On the distribution side, AC/DC hybrid distribution system has been widely studied for its advantages of accessing multiple types of energy, satisfying diversification energy demand, realizing multi-energy complementation and improving grid security. The energy efficiency evaluation and management of AC/DC hybrid system are of great guiding significance to the planning and design of AC/DC system. However, traditional energy efficiency management mainly reduces primary energy consumption by saving electricity. For AC/DC systems with multiple distributed energy sources, it is difficult to reflect the efficiency level of the whole system by considering a single technology or a single part of energy efficiency management. Aiming at the characteristics of AC/DC hybrid distribution system, this paper studies the energy efficiency management method of the system. Firstly, combined with energy efficiency evaluation and system economic analysis, energy efficiency evaluation index of AC/DC hybrid distribution system are formulated. Secondly, the energy efficiency management method is studied through the study of adjustable load, transferable load and different types of load overall management method. Then the method of combining power quality and energy efficiency is studied. Finally the interaction between source and load is studied to improve the energy efficiency of the system. The energy efficiency management method proposed in this paper can fully tap the potential of load adjustable and energy saving, improve the comprehensive energy utilization efficiency of the system, which provides a basis for the engineering application of AC/DC hybrid power grid.