互联电力系统新增发电装机同用电量增长的优化模型及实证研究

Mathematical Models of Optimizing the Growth of Generating Capacity and the Increase of Electricity Consumption in a Multi-regional Interconnected Power Grid

如何以最小发电装机增长来换取最大社会用电量增长是电力供需形势紧张环境下值得研究的问题。对于孤立系统而言,问题研究相对简单;而在多区域互联电力系统中,问题的研究变得相对复杂。在构建模型的基础上提出一种新的研究方法,即通过联网输送到某地区的电量或在已联网基础上增加的外送电量可等效为该地区当年新增发电量,将这部分新增电量累积到实际新增发电机组发电量上,则相当于提高了这些新增发电机组的年平均利用小时数。年平均利用小时数提高有效缓解了电量短缺矛盾,更大程度地满足用电需求。多区域互联电力系统中,各子系统之间互为备用,系统总容量备用率呈下降趋势。最后通过实例分析验证了该方法的可行性,此方法在联网论证和后评估工作中具有一定实用价值。

How to facilitate the growth of the electricity consumption with the least increase of generating capacity is a significant problem when power supply shortage in a main concern. This problem becomes more difficult for a multi-regional interconnected power grid than an isolated regional power system. The paper proposes a new method to solve this problem for a multi-regional interconnected power grid. The new method treats the electricity transmitted from one area to another through the power grid as the electricity generated by a local new power generator. By doing so, the average available hours of the new power generator will be improved with less reserve capacity. In the multi-regional inter-connected power grid, the subsystems can share their reserve capacities, so the total reserve capacity in the grid can be reduced.