基于电网模型等值的省地协同发电计划优化方法

发布时间：2019-05-07 18:00

【摘要】：部分地区电网中含有可调节机组,通过省地两级调度资源的联合优化可实现电网的全局效益,但省地调一体化调度模型因机组数量多、网络规模大,求解效率会受到限制。该文提出了基于电网模型等值的省地协同发电计划优化方法,首先,为了实现电网模型扩展的适度和有效,通过WARD等值原理聚类分析地区电网节点功率对外转移特性,将对外功率转移相似的节点网络化简为虚拟节点,压缩地区电网规模,与省级电网拼接形成全网计算模型,实现模型等值;其次,将化简地区电网的可调度资源作为等值机组建模,与省调机组一起进行参与全省发电调度优化,求得全省发电计划优化解;最后,将虚拟节点发电计划分解到地调机组,得到地区电网机组的发电计划。算例结果表明文中方法计算效率较高,可提高电网运行的安全性和经济性水平。
[Abstract]:There are adjustable units in some regional power grids, and the overall benefit of the power grid can be realized through the joint optimization of the provincial and local two-level dispatching resources. However, due to the large number of units and the large scale of the network, the efficiency of solving the problem will be limited by the integrated dispatching model of provincial and local dispatching. In this paper, an optimization method of cooperative generation plan based on grid model equivalence is proposed. Firstly, in order to realize the moderate and effective expansion of power network model, the power transfer characteristics of regional power grid nodes are analyzed by clustering method of WARD equivalence principle. The network of nodes with similar external power transfer is simplified as virtual node, and the scale of regional power grid is compressed, and the whole network computing model is formed by splicing with provincial power grid to realize the equivalent of the model. Secondly, the schedulable resources of simplified regional power grid are modeled as equivalent units, and the provincial dispatching units are involved in the optimization of power generation scheduling in the whole province, and the optimal solution of the provincial power generation plan is obtained. Finally, the virtual node generation plan is decomposed into the ground dispatching unit, and the generation plan of the regional power grid unit is obtained. The numerical results show that the proposed method is efficient and can improve the security and economy of power grid operation.
【作者单位】：中国电力科学研究院;国家电力调度控制中心;国网福建电力调度控制中心;
【基金】：国家电网公司科技项目(DZB17201400047)~~
【分类号】：TM73

【相似文献】