适应大规模新能源消纳的网源协调系统控制优化研究

Control Optimization of Grid Source Coordination System for Large-scale New Energy Consumption

光伏发电、风电等新能源出力的波动性和随机性会造成发电系统输出功率随机波动,加重电网频率的调节负担,同时大规模新能源接入电力系统,会替代部分常规机组,进一步削弱电网的调频能力。首先阐述了大规模新能源并网后对电力系统频率响应的影响及电力系统对调频的需求,然后从光伏发电、风电等新能源,需求侧资源,储能系统等参与调频以提高电网调频能力方面进行了综述分析。结论表明,光伏发电、风电等新能源参与调频,需求侧资源与适当容量储能合理参与调频市场是提高电网调频能力的有效方法,随着调度技术的日益成熟、储能成本的降低,针对电网调频进行研究将具有更高的实际应用价值。

The fluctuation and randomness of the output of new energy such as photovoltaic power generation and wind power will cause random fluctuations in the output power of the power generation system,which will increase the burden of power grid frequency regulation.At the same time,large-scale new energy access to the power system will replace some conventional units,further weakening the frequency modulation capability of the power grid.Firstly,the impact of large-scale new energy grid connection on the frequency response of power system and the demand of power system for frequency modulation were described.Then,the frequency modulation capability of power grid was improved through the participation of new energy such as photovoltaic power generation,wind power,demand side resources,energy storage system,etc.The conclusion shows that it is an effective method to improve the frequency regulation capability of the power grid to participate in the frequency regulation market with new energy sources such as photovoltaic power generation and wind power,and reasonably participate in the frequency regulation market with demand side resources and appropriate capacity energy storage.With the increasingly mature dispatching technology and the reduction of energy storage cost,the research on the frequency regulation of the power grid will have higher practical application value.