Technical and Economic Feasibility of Applying Battery Energy Storage for Enabling Voltage Stability of Grid-Connected Photovoltaic Power Systems

摘要

Voltage stability is considered to be a significant issue due to the increased penetration level of photovoltaic (PV) power generation. The voltage deviation, which occurs normally at the connection point of photovoltaic power generation, is resulted from the non-robust distribution network especially in some Chinese rural area. Battery Energy Storage System (BESS) are increasingly interesting to help integrate solar power into the grid. In this paper, an investigation of technical and economic feasibility will be implemented to propose a cost-effective sizing and operation strategy for distributed BESS in the distribution networks. The cost effectiveness of the BESS will be discussed by numerical simulations of power flow calculation based on hour-by-hour solar power generation, which is related to a typical distribution network in Chinese rural area. The results prove the possibilities of making voltage management in an economical and efficient way.