Long Term Typical Day Peak Load Regulation Method for Hydropower Station Group

地处我国东部经济负荷中心地区的省级电网普遍面临着巨大的调峰压力，充分发挥水电的调峰能力对电网调度具有实际意义。针对水电站群长期调峰优化问题，本文提出了一种以电网典型日调峰效益最大为优化目标的水电调度模型。该模型定义了一个调峰偏好参数，并以此为关联因子构建了水电长期调度中电量与调峰之间的相关联系。通过试算优化调峰偏好参数的数值大小，平衡水电站长期电量效益与电网典型日调峰效益间的矛盾。模型求解方法吸收了POA、DDDP、DPSA等成熟的算法优化思路，并在水位迭代寻优过程中耦合了逐次切负荷算法处理电站典型日电站出力分配问题，联合多种寻优算法对模型进行高效求解。最后以编制浙江电网省调水电站群长期调度方案为例，对所提模型及方法进行验证。结果表明，所提模型及方法在保证水电系统电量不受明显损失的前提下，能有效发挥水电系统的长期调峰能力，具备良好的实用价值。 The provincial power grid, which is located in the east of our country’s economic load center, is faced with great peak load pressure. In terms of optimization of hydropower’s Long term peak load dispatching, a long-term optimal dispatching model of hydropower station is established, which is based on the maximum benefit of typical daily peak regulation of power network. A Peak regulation preference parameter is also defined. Based on the correlation factor, the relationship between electricity and peak load regulation is constructed in long term hydropower dispatching, and then optimize peak value parameter after trials and analysis, balancing contradictory between the long term power benefit and the typical peak load regulation of power grid. The model uses POA, DDDP, DPSA algorithm to solve the problem. The typical load distribution problem of power network is treated by the successive load shedding algorithm. The results show that the proposed model and method can ensure the long term peak regulation capability of hydropower system under the premise of ensuring that the power consumption is not obvious. The proposed model and method have good practical value.