基于梯级电量联动控制的高比例水电电力市场日前现货出清方法

Day-ahead Clearing Method for High Proportion Hydropower Electricity Market Based on Cascade Energy Linkage Control

高比例水电电力市场中水电是重要的市场主体,对出清结果有重要和决定性影响,梯级电站间紧密的水力时空耦合关系和水电清洁消纳政策,使得其现货出清方法较火电为主的市场复杂和困难得多。针对高比例水电市场特点,结合云南电网电力市场的真实需求,以购电费用最小为目标将梯级水电站日电量动态控制纳入系统约束,基于迭代的成交电量,建立上下游梯级的联动控制边界,将上述目标和约束自动加载到商业求解器优化框架,通过混合整数线性规划模型迭代优化求解。以云南电网122座水电站和11座火电站真实的日发电计划数据作为参考,实现了日前现货竞价出清仿真,结果表明水电现货出清计划都能满足梯级水力约束条件,且计算时间均控制在3min以内,满足了高比例水电系统日前市场出清时效性和实用性要求。

Hydropower is an important market body in the high-proportion hydropower market,which has an important and decisive influence on the clearing results.Due to the tight hydraulic spatial-temporal coupling relationship between cascade power stations and the clean absorption policy of hydropower,the spot clearing method is much more complex and difficult than the thermal power market.According to the characteristics of high-proportion hydropower market and the real demand of Yunnan power market,the daily power dynamic control of cascade hydropower stations was incorporated into the system constraint with the goal of minimizing the power purchase cost.Based on the iterative trading power,the linkage control boundary of the upstream and downstream was established,and the above objectives and constraints were automatically loaded into the optimization framework of the commercial solver,which was solved by the iterative optimization of mixed integer linear programming(MILP)model.Taking the actual daily power generation plan data of 122 hydropower stations and 11 thermal power stations in Yunnan power grid as reference,the simulation of the day-ahead spot bidding clearing was realized.The results show the hydropower spot clear plan can meet the cascade hydraulic constraints,and the calculation time is controlled within 3 minutes,which satisfies the timeliness and practicability requirements of day-ahead market clearing of high-proportion hydropower system.