开放售电市场环境下考虑DG和ILR的配电网双层规划

Distribution network planning considering DG and ILR under the environment of power sales side liberalization

电力体制改革改变了电力市场的运营模式,给供电公司的规划、运行带来了深刻影响。在此背景下,分析电力体制改革对电网规划的新要求,建立售电侧开放环境下,考虑分布式电源和可中断负荷响应的配电网双层规划模型。上层模型以投资费用最小以及较高的电能质量和供电可靠性为目标,下层模型对运行阶段的DG出力和可中断负荷响应进行决策。上层为混合整数非线性规划,采用遗传算法求解;下层为连续非线性规划,采用原对偶内点法求解。最后,采用33节点系统对该模型的有效性进行检验,通过对供电公司收益进行分析,验证了在配电网规划的下层模型中引入售电市场竞争机制,能够有效适应供电公司盈利模式变化带来的影响。

The power system reformation changes the power market operation mode and deeply influences on the planning and operation of the power supply company.Under this circumstacne,the new planning requirement from the reformation is analyzed,and a bi-level distribution network planning model is established by considering DG and ILR under the environment of deregulated retailer market.The objective of upper level is to minimize the cost of investment and maximize power supply reliability and power quality.While the lower level make optimally decision to the DG output and ILR in the operation stage of distribution network.Besides,the upper level model is the mixed integer nonlinear planning and the genetic algorithm is employed.The lower level model is continuous nonlinear planning and it is solved by utilizing the prime dual interior point method.Finally,a modified IEEE-33 bus system is included to verify the proposed model.The income of power supply company is analyzed.It is shown that introducing the power sales side market competition into the lower level of distribution network planning can suit to the change of profit pattern.