A Distributed Photovoltaic High Penetration Grid Voltage Optimization Method Based on Energy Storage Batteries

Abstract

The invention relates to an optimization method for photovoltaic high-permeability network voltage based on an energy storage battery. The optimization method is characterized by comprising the following steps: analyzing a voltage out-of-limit mechanism and a mechanism for improving voltage out-of-limit based on the energy storage battery; improving an optimization model and solving of the voltage out-of-limit; and determining the optimal allocation capacity of the energy storage battery. The angle of users is taken into full consideration, the voltage out-of-limit mechanism and the mechanism for improving voltage out-of-limit based on the energy storage battery are combined, the level of system node voltage is improved through genetic algorithm solving, the optimal allocation capacity value of the energy storage battery is obtained, the optimization method has the advantages of being scientific, reasonable, excellent in practical effect and the like, and the basis can be provided for constant volume, operational control and the like of the energy storage battery in a power distribution network.

Description

technical field [0001] The invention is a distributed photovoltaic high-permeability grid voltage optimization method based on energy storage batteries. Background technique [0002] As a form of renewable energy power generation, distributed photovoltaic power generation has the advantages of high efficiency, high quality, clean and environmental protection. According to statistics, as of the end of 2015, my country's cumulative installed capacity of photovoltaic power generation was 43.18 million kW, becoming the country with the largest installed capacity of photovoltaic power generation in the world. Among them, distributed photovoltaic installed capacity was 6.06 million kW, accounting for 14%. The distributed photovoltaic industry has been included in my country's "Thirteenth Five-Year Plan" as a key development target, with rapid development and broad prospects. [0003] After distributed photovoltaics are connected to the distribution network, the traditional distr...

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Problems solved by technology

[0003] After distributed photovoltaics are connected to the distribution network, the traditional distribution network will change from a single-source radial network to a dual-source and multi-source complex topology network structure, which will bring a series of impacts to the distribution network, such as node voltage exceeding the limit The problem has become a serious obstacle restricting the widespread application of distributed photovoltaics: on the one hand, the power quality is poor, the power supply is inefficient, and even causes abnormal load operation; bad sex

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