The Topology of a New Energy Router and Its Coordinated Control Strategy

Abstract

With the rapid growth of the permeability of distributed new energy and the development of Energy Routers based on power electronics technology, the construction of AC/DC hybrid distribution network based on Energy Routers is expected to become a new development direction of urban power grid. This paper proposes a hybrid AC/DC main urban power Grid and Microgrid interconnection architecture based on a new Energy Router topology and its coordinated control strategy as the basic module of future urban power Grid. In this paper, considering the current situation of land resource shortage in the central area of the city, the new energy generation and energy storage technologies represented by photovoltaic building integration and electric vehicles are considered and connected to the urban distribution network in the form of integrated Microgrid. Considering that the electricity production and consumption patterns of adjacent Microgrids may be greatly different, the interconnection architecture between the main power grid and the Microgrid can be constructed. So in this paper, the Energy Router integrated with AC and DC double busbar and four voltage source inverter, coordinated control strategy is a blend of PQ control strategy and V/f control strategy, based on the disturbance observation method of MPPT control strategy of photovoltaic power generation and the control strategy of energy storage system, it not only make full use of new energy, but also effectively ensure the quality of electricity supply. Simulation and analysis of each model and control strategy were carried out on MATLAB 2016a/Simulink simulation platform, and the results verified the effectiveness and reliability of the proposed Energy Router topology and coordination control strategy.