新能源参与的电力系统备用辅助服务成本价值机制分析

Analysis of cost value mechanism for backup auxiliary services in power systems considering the participation of new energy

为解决新能源参与辅助服务市场机制问题,提出了计及新能源参与的备用辅助服务成本价值机制。采用基于成本和效益评估的备用服务成本价值方法,结合我国初级电力市场的情况,提出了新能源提供旋转备用服务的机会成本、系统失负荷价值及系统可靠性指标相结合的定价模型,建立了由机会成本表示的供给成本模型,效益则根据消费者剩余理论由服务效益的失负荷价值(VOLL)计算,并通过可靠性指标失负荷概率(LOLP)作为权重,综合并且合理地确定了新能源提供辅助服务的补偿价格,最后通过算例分析说明了备用期望价值判断备用容量与负荷需求之间的非线性关系,从而进一步优化电网备用辅助服务与负荷的关系。

To address the issue of market mechanism for new energy participation in auxiliary services,a cost value mechanism for backup auxiliary services that takes into account new energy participation was proposed.Adopting a cost value method for backup services based on cost and benefit evaluation,combined with the situation of China′s primary electricity market,a pricing model combining the opportunity cost,system value of lost load,and system reliability indicators of new energy to provide rotating backup services was proposed.A supply cost model represented by opportunity cost was established,and benefits were calculated based on the value of lost load(VOLL)of service benefits based on consumer surplus theory.And the compensation price for providing auxiliary services for new energy was comprehensively and reasonably determined using the reliability index loss of load probability(LOLP)as the weight.Finally,an example analysis was used to illustrate the nonlinear relationship between reserve expected value and load demand,in order to further optimize the relationship between reserve auxiliary services and load in the power grid.