计及高压配电网负荷转供的城市220 kV片区电网供电能力分析

发布时间：2018-04-13 06:52

本文选题：城市电网 + 供电能力　；参考：《电网技术》2017年05期

【摘要】：传统220 kV片区电网供电能力分析方法往往将电网分离出来单独计算,忽略了片区间110 k V高压配电网重构对潜在供电能力的挖掘作用,因此提出计及高压配电网转供能力的220 k V片区电网供电能力计算模型,在传统供电能力分析模型的基础上加入片区间高压配电网重构模型,利用网络重构来疏导220 k V片区电网间的潮流分布,挖掘潜在供电空间。其次构建适用于110 kV高压配电网负荷转供的重构模型,根据其拓扑特点抽象出变电单元及变电单元组的简化模型,筛选变电单元组拓扑状态,保留可行解,进而构建基于变电单元组可行状态选择的转供模型。以单元组可行拓扑状态选择变量代替传统开关0-1状态建模,有效降低问题求解维度,节约计算时间,适用于在线分析。以某城市220 k V片区电网算例进行仿真,结果表明计及高压配电网重构的多片区整体供电能力要高于单独计算每个区的供电能力总和,片区间通过高压配电网重构使得网络供电能力得到更充分的挖掘和利用,进一步提升资产利用率。
[Abstract]:The traditional analysis method of power supply capacity of 220kV area power network often separate out the power grid and calculate separately, neglecting the excavating effect of reconfiguration of 110kV high voltage distribution network on the potential power supply capacity.Therefore, a calculation model of power supply capacity in 220kV area considering the switching capacity of high-voltage distribution network is proposed. The reconfiguration model of high-voltage distribution network with slice interval is added on the basis of the traditional power supply capacity analysis model.Network reconfiguration is used to dredge the distribution of power flow between 220kV power grids and to excavate the potential power supply space.Secondly, the reconfiguration model suitable for 110 kV high voltage distribution network load transfer is constructed. According to its topological characteristics, the simplified model of substation unit and substation unit group is abstracted, and the topological state of substation unit group is selected, and the feasible solution is reserved.Then a switching model based on feasible state selection of substation unit group is constructed.Instead of the traditional switch 0-1 state model, the unit group feasible topological state selection variable can effectively reduce the dimension of solving the problem and save computing time. It is suitable for on-line analysis.The simulation results show that the overall power supply capacity of the multi-region considering the reconfiguration of the high-voltage distribution network is higher than the sum of the power supply capacity of each district calculated separately.
【作者单位】：四川大学电气信息学院;国网成都供电公司;
【基金】：四川省科技厅应用基础项目(2015JY0128) 国家高技术发展研究计划(863)(2014AA051901)~~
【分类号】：TM727.2

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