考虑振动区和水-电耦合的现货市场出清模型

Spot Market Clearing Model Considering Cascaded Hydropower Vibration Area and Hydroower Coupling Constraints

摘要:

梯级水电站优化调度模型具有振动区、带时滞、非线性等特点，其市场出清问题需要增加更多离散变量数；同时，电力市场中水力和电力存在复杂的耦合约束，使得计算时间显著增加，难以满足实际生产需求。首先，对电力现货市场水-电耦合产生的物理制约进行联动分析，建立了考虑水-电耦合约束的出清模型；然后，针对水-电耦合约束中振动区的大量离散变量，基于电厂的流域关系和隶属关系，将振动区相关变量和约束进行压缩；最后，基于实际电网数据开展了算例分析。结果表明，所提现货市场出清模型和变量降维方法可以有效减少含梯级水电的市场出清时间，满足电力现货市场的实际运行需求。

Abstract:

The market clearing problem needs to add more discrete variables due to the characteristics of optimal dispatch model of cascaded hydropower station with vibration area, time delay and nonlinearity. At the same time, the hydraulic and power coupling constraints are complex, which makes the calculation time significantly increased so as to difficultly meet the actual requirements. Firstly, a market clearing model considering hydropower coupling constraints is formulated. Secondly, for a large number of discrete variables of vibration area in hydropower coupling constraints, and based on the basin relationship and membership relationship of power plants, the variables and constraints related to the vibration area are compressed. Finally, based on the actual power grid data, an example analysis is carried out, and the results show that the proposed spot market clearing model and variable dimension reduction method can effectively reduce the market clearing time, and meet the actual operation demand of spot market.