Distribution network distributed photovoltaic absorbing capacity calculation and energy storage optimization configuration method

To make a reasonable assessment of the absorbing capacity of distributed photovoltaics (PV) and to analyze the increasing power of photovoltaic capacity by configuring energy storage, this paper proposes a method for measuring the absorbing capacity of distributed photovoltaics and energy storage in distribution networks. Firstly, a photovoltaic supply-demand ratio index is defined to evaluate the relationship between the photovoltaic power generated by the distribution network and the load demand. According to the photovoltaic consumption intensity index combined with historical data, the absorbable photovoltaic capacity can be determined and then deduced an optimized configuration method for energy storage. Finally, the validity of the proposed method is verified using actual photovoltaic and load power consumption data in a particular area.

I Introduction

With the increasingly major environmental problems, the demand for distributed power sources represented by photovoltaics to connect to the distribution network has increased sharply. The large-scale access of distributed photovoltaics will cause changes in power output and load balance, which will affect the power quality, short-circuit current, power flow distribution, and power supply security of the distribution network. Therefore, it is urgent to evaluate and calculate the maximum carrying capacity of distributed photovoltaics, provide a relevant basis for distributed photovoltaics to connect to the distribution network, and realize the safe and orderly access of distributed photovoltaics to the distribution network.