基于枚举法的地区电网接纳风电能力评估

Evaluation on the wind power capacity of regional power grid based on enumeration method

为准确评估地区电网的最大接纳风电容量,提出一种基于电网调峰能力约束、静态安全约束和暂态稳定约束的风电接纳评估体系。首先利用随机生产模拟技术评估风电并网后对系统备用容量的需求,进而修正传统调峰能力约束下接纳风电容量的评估;然后利用DIg SILENT平台的枚举法对各接入点可能出现的接入容量组合进行潮流计算,实现了全局搜索寻优。通过设置常见的大扰动工况进行机电暂态仿真验证,最终得到满足暂态稳定约束,即整个地区电网的最大接纳风电容量。

In order to assess the wind power capacity of regional power grid accurately, this paper pro- poses a assessment system based on grid peaking capacity constraints, static security constraints and transient stability constraints. Considering large scale wind power connecting to the grid will impact on the power system, this paper firstly uses the stochastic production simulation technology to assess the system reserve capacity demand after wind power connecting to the grid, and correct the regional power grid wind power capacity under the traditional peak load capacity constraint. In order to improve the deficiency of traditional static security constraint evaluation method, using the DPL script of DIgSI- LENT platform to execute load flow calculation of every access capacity combination that may occur at each access point, and achieve the global optimization. With wind power capacity of each access point confirmed, common large disturbance conditions are set and verified by electromechanical transient simulation. Finally, the maximum wind power acceptance capability of the whole area is obtained, which satisfies the transient stability constraints.