基于补偿法和节点方程的配网合环快速模拟法

A Fast Simulation Method of Distribution Network Loop Closing Based on Compensation Method and Nodal Equation

为提高运行人员对合环场景的态势感知能力,即时模拟合环操作对配网的影响,提出一种基于补偿法和节点方程的配网合环快速模拟法。用补偿法模拟合环电气量变化,以描述电力网络运行状态的节点方程为基础,推导出基于关联矩阵和导纳矩阵的合环模拟公式,从潮流角度定量刻画合环操作对配网的影响。该算法仅需合环前运行状态和网络参数,便可直接推算合环后运行状态,无需重新计算潮流。以PG&E 69节点系统和某实际配网为例,验证了合环模拟法的有效性和实用性。

In order to improve operators＇ situation awareness of dealing with loop closing scenarios,a fast simulation method of distribution network loop closing based on compensation method and nodal equation was proposed to simulate the influence of loop closing on distribution network rapidly. The change of loop closing electrical quantities was depicted by compensation method,and loop closing simulation formulas based on incidence matrix and admittance matrix were derived with nodal equation to quantitatively describe the influence of loop closing on distribution network. Only running state and network parameters before loop closing were needed to calculate the state after loop closing,and there was no need to recalculate power flow. The PGE 69-node system and a practical distribution network were simulated,and the results proved the validity and practicality of the proposed method.