基于网源协同多阶段投资规划的配电网过网费机制设计

Network Fee Mechanism Design for Distribution Network Based on Multi-stage Investment Planning with Network-Source Cooperation

针对分布式电源就地消纳会造成电网企业输配电成本流失,且现行输配电价制定机制尚不能真实反映“余电上网”模式下分布式电源对配电网的实际使用情况,提出一种基于网源协同多阶段投资规划的配电网过网费机制设计。首先,根据负荷增长情况,以投资年份、投资容量为决策变量,将分布式电源规划周期分为若干阶段,在此基础上利用所提过网费模型分别求出各阶段对应的过网费。其中,源网协同多阶段规划模型的建立以分布式电源投资主体效益最大及配电网网损和电压波动最小为目标,过网费计算模型则依据分布式发电市场化交易的输配电资产占用情况、电压等级和电气距离等关键影响要素,构建了含基础费用、阻塞附加费用和交叉补贴费用的分布式电源过网费。仿真结果表明,所提出的与分布式电源投资规划相结合的过网费机制能够保证投资主体的效益和配电网的资产回收,并能在一定程度上提高分布式电源的渗透率和消纳率。

In view of the loss of transmission and distribution cost of power grid enterprises caused by local accommodation of distributed generators,and the current formulation mechanism of transmission and distribution prices can not truly reflect the actual utilization of the distribution network by distributed generators in the mode of“surplus power sent to power grid”,this paper proposes a network fee mechanism design for the distribution network based on the multi-stage investment planning with networksource cooperation.First,according to the load growth situation,taking the investment year and capacity as the decision variables,the planning cycle of distributed generators is divided into several stages.On this basis,the network fee corresponding to each stage is calculated by using the proposed network fee model.The multi-stage planning model with source-network cooperation aims to maximize the main benefits of investors of distributed generators and minimize the loss and voltage fluctuation of the distribution network.The calculation model of network fee is based on key influencing factors,such as the occupation of transmission and distribution assets,the voltage level,and the electrical distance of market-based distributed generation trading.The network fee of distributed generators is constructed,which includes the basic charge,the congestion surcharge,and the cross-subsidy charge.The simulation results show that the proposed network fee mechanism combined with the distributed generator investment planning can guarantee the benefits of the investors and the asset recovery of the distribution network,and can improve the penetration and accommodation rate of distributed generators to a certain extent.