基于价值分配方法的无功辅助服务市场研究

Research on the market for reactive aucillary services based on a value-allocation approach

新能源机组并网导致系统电压波动问题,给电力系统的无功调控带来新的挑战。与原有单一的无功调压方式和补偿标准相比,市场化无功调压能够体现不同无功源的时空特性,激励无功补偿设备的投资与建设。为此提出基于价值分配方法的无功辅助服务市场出清机制,激励新能源机组及用户侧无功补偿设备参与无功调压。首先明确市场成员的报价规则,构建市场出清模型;其次制定无功补偿机制,提出基于价值分配方法的无功辅助服务定价公式,采用维克里-克拉克-格罗夫斯机制量化市场成员的真实无功价值,解决无功市场力问题。使用IEEE-30节点数据进行仿真分析,获得各时段无功出力计划、有功网损、无功节点电价和无功补偿费用。结果表明,基于价值分配方法开展无功市场能够激励市场成员真实报价,维持系统电压水平稳定,并使得各类型无功补偿设备获得合理收益。

The problem of system voltage fluctuation caused by the grid integration of new energy units brings new challenges to reactive power regulations of the power systems.When compared with the single reactive power regulation method and compensation standard,market-based reactive power regulation can reflect the temporal and spatial characteristics of different reactive power sources and stimulate the investment and construction of reactive power compensation equipments.Therefore,a market clearing mechanism for reactive aucillary services based on the value allocation method is proposed to incentivize new energy units and user-side reactive compensation equipments to participate in reactive power dispatch.Firstly,the offer rules of market members are clarified,and the market clearing model is constructed.Secondly,the reactive power compensation mechanism is formulated,and the pricing formula for reactive aucillary services based on the value allocation method is proposed.The Vickery-Clark-Groves mechanism is used to quantify the genuine reactive power value of market members and suppress the market power.Simulation analyses are conducted using IEEE-30 node data to obtain the reactive power output plan,active network losses,reactive node tariffs and reactive compensation costs for each period.The results show that conducting the reactive power market based on the value allocation method can motivate market members to provide real bids,maintain the stability of the system voltage level,and enable each type of reactive power compensation equipment to obtain reasonable benefits.