深度｜电力体制改革背景下 电企如何售电以获取最大化利益？

其中调度模式1的调度模型是在本文调度模型的基础上去掉深度调峰的收益与成本函数以及约束条件,且所有的Z(t,s)=0;调度模式2是在本文调度模型的基础上去掉储热罐的运行成本函数与运行约束条件;调度模式3即为本文的调度模型。3种调度模式的对比结果如表7所示。

对比模式1和模式3的结果,热电厂参与两个市场获得的总收益高于只参与电能市场所获得的总收益,这是因为深度调峰市场的边际出清价格大部分情况下都高于电能市场的售电价格。模式1比模式3的偏差费用少的原因是热电厂提供深度调峰服务时其调节偏差的能力变弱,偏差主要靠储热罐调节,但偏差费用减少的幅度少于深度调峰补偿收益,所以模式3总收益更高。对比模式2和模式3,配置储热罐提高了热电厂的调峰能力,在降低偏差补偿的同时提升了深度调峰补偿收益和总收益。

5 结论

针对东北电力调峰辅助服务市场的运营规则,提出了基于两阶段随机规划的热电厂竞价策略,第一阶段以热电厂发电成本最小为目标求取出力初态以及参与深度调峰市场可获更高收益的时段;第二阶段以热电厂收益最大为目标,分配电能市场和深度调峰市场的投标电量。算例分析结果表明：

1）相比蒙特卡洛算法,拉丁超立方体算法生成的场景集,对原始数据的覆盖率更高、与历史数据更为接近,作为调度模型的输入更具参考意义。

2）由市场出清模型预估的中标电量与投标电量上限之间留有裕度,使得竞价策略鲁棒性较好。

3）相比于只参与电能市场,热电厂同时参与电能市场和深度调峰辅助服务市场可获更高收益,且通过配置储热罐可进一步提升收益。

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