考虑青海直流的河南省电力公司购电优化决策

Optimal Purchase Decision of Henan Electric Power Company Considering Qinghai Direct Current

提出一种省级电力公司在多级多时间尺度市场上的购电协调决策方法。首先是基于中长期电量平衡对年度、月度购电优化空间的辨别;其次在存在购电优化空间的基础上,基于两纬度风险分析法,进行考虑购电风险及成本的省级电力公司购电优化。以购电成本最小为目标,加入风险约束,构建同时考虑购电成本最小以及风险最小的优化模型;最后依据青海直流送端配套电源建设情况以及河南电网现状及发展情况,以青海—河南±800kV特高压直流输电工程为例,对青海直流投运后2020—2025年河南省电力公司的购电策略进行优化决策,验证了所提方法的可行性和有效性。

A coordinated decision-making method for provincial power companies in multistage and multi-time scale markets is proposed.Firstly,the optimization space of annual and monthly power purchase is identified based on the medium and long term power balance.Secondly,on the basis of the existence of power purchase optimization space,based on the two-latitude risk analysis method,the power purchase optimization of provincial power companies considering the risk and cost of power purchase is carried out.Taking the minimum power purchase cost as the goal and adding the risk constraint,the optimization model considering both the minimum power purchase cost and the minimum risk is constructed.Finally,according to the construction of supporting DC power supply in Qinghai province and the current situation and development of Henan power grid,taking Qinghai-Henan±800 kV UHVDC transmission project as an example,the power purchase strategy of Henan Electric Power Company in 2020-2025 after Qinghai DC is put into operation is optimized and the feasibility and effectiveness of the proposed method are verified.