Abstract:Agriculture and animal husbandry in remote areas and electrified areas along the railway is rich in light resources and sufficient space resources, which has good construction conditions of distributed photovoltaic, so the introduction of distributed photovoltaic in these areas can not only to cater to the "new energy locally given nearby" policy requirements, also can provide certain energy support for the system, and to a certain extent, it can improve the flexibility of the system. In order to solve the problems such as single/three-phase transformation, power quality control and local accommodation of photovoltaic energy, and taking "traditional control improvement-new topology-underlying control research-coordinated control design" as the main line, a single/three-phase transformation system with power quality control ability is put forward considering photovoltaic access, and the related simulation models are established in Matlab/Simulink. The simulation results verify the correctness and effectiveness of the new single/three-phase transformation system and its coordination control strategy.