考虑不同类型DG和负荷建模的主动配电网协同规划

Coordinated Planning Considering Different Types of DG and Load in Active Distribution Network

随着主动配电网中不可控分布式电源(distributed generation,DG)渗透率的不断提高,其给配电网规划运行提出了更大的挑战,可能导致配电网电压越限、清洁能源弃电等问题。基于此,该文在规划阶段充分应用不同类型DG和负荷的时序性和潮流计算特性,以及引入不同恢复率的激励型需求响应(demand response,DR)模型,从而构建考虑不同DG和负荷类型建模的主动配电网协同规划决策模型。该模型以年度为时间尺度,并考虑年内DG和负荷的时序运行模拟,形成了投资层面和运行模拟层面的多时间尺度双层优化模式,且在决策目标中添加了DR成本和清洁能源弃电成本等为优化目标,同时,在模型约束中也涉及可控DG和主网出力的爬坡率限制。最后,通过算例对时序性、潮流计算特性和DR容量等方面进行有效性验证分析。

As an increasing penetration of un-dispatched distributed generation（DG） in the active distribution network, the planning and operation are more complex meanwhile it would lead to some problems such as the violation of voltage and curtailment of renewable energies. This paper established a coordinated planning model considering time-varying and power flow characteristics for different types of DG and load. Moreover, different recovery rates for loads were introduced into incentive demand response（DR） formulation. After the detailed time-varying simulation of operation process, the planning model becomes a multistage and bi-level（investment level and operation level） programming problem, in which the planning time interval is one year. The demand response cost and curtailment cost of renewable energies were added in the objective functions while power output limit and ramp limit for transmission network and controllable DG were involved in the constraints. Finally, the test cases verified the effectiveness of the proposed method via the analysis on the time varying and static voltage characteristic, and demand response capacity.