基于轨迹灵敏度的动态等值模型参数分类优化方法

doi:10.3969/j.issn.1000-7229.2015.08.005

电力建设 ›› 2015, Vol. 36 ›› Issue (8): 29-33.doi: 10.3969/j.issn.1000-7229.2015.08.005

基于轨迹灵敏度的动态等值模型参数分类优化方法

周海强1, 张琦兵2, 顾康慧1

1. 河海大学能源与电气工程学院，南京市 211100；2. 国网江苏省电力公司，南京市 210024

出版日期:2015-08-01
作者简介:周海强（1971），男，博士，副教授，主要研究方向为电力系统建模、稳定与控制；张琦兵（1985），男，硕士，工程师，主要研究方向为电力系统自动化；顾康慧（1991），男，硕士研究生，主要研究方向为电力系统建模。
基金资助:
国家自然科学基金项目（50977021）。

A Trajectory Sensitivity-Based Dynamic Equivalent Model Parameters Optimization Method

ZHOU Haiqiang 1, ZHANG Qibing2, GU Kanghui1

1. Energy and Electrical Engineering School, Hohai University, Nanjing 211100, China； 2. State Grid Jiangsu Electric Power Company, Nanjing 210024, China

Online:2015-08-01
Supported by:
Project Supported by National Science Foundation of China （50977021）.

摘要/Abstract

摘要：

电力系统动态等值模型必然存在一定误差，边界联络线功率对等值模型参数的轨迹灵敏度揭示了等值模型误差与模型参数之间的量化联系，可据此优化等值模型参数。为此，提出了基于轨迹灵敏度的动态等值模型参数分类优化方法。首先，介绍了轨迹灵敏度及其计算方法；然后，讨论了考虑综合负荷的电力系统动态等值模型的一般结构，根据不同参数轨迹灵敏度的特点，将模型主导参数划分为静态、动态主导参数进行分类优化；最后，将算法应用于IEEE10机39母线算例系统，对等值模型中的虚拟阻抗、惯性时间常数、定子电抗及转子电阻等参数进行了优化。仿真结果表明，该方法能有效提高等值模型精度，且所需计算量小，优化速度快，具有良好的应用前景。

关键词: 动态等值模型, 轨迹灵敏度, 综合负荷, 参数优化

Abstract:

The dynamic equivalent model of power system inevitably exists some errors. The trajectory sensitivities of the tie lines power to the equivalent parameters reveal the quantitative relation between the equivalent error and model parameter, which can be used to optimize the equivalent model parameters. Thus, a trajectory sensitivity-based optimization method was proposed for dynamic equivalent model parameters. Firstly, the definition and calculation of trajectory sensitivity were introduced. Then, the structure of the dynamic equivalent system with consideration of synthesis loads was discussed. The dominant parameters were classed into static or dynamic dominant parameters and optimized separately according to different characteristics of the trajectory sensitivities. Finally, the algorithm was applied in the optimization of the equivalent model of the IEEE 10-machine 39-bus system. The fictitious impedances, inertia time constant, stator impedance and rotor resistance of the equivalent motor were optimized. The simulation results show that the proposed method can improve the precision of the equivalent model effectively. It has a fast convergence speed and needs very little computation tasks, and so has a good application prospect.

Key words: dynamic equivalent model, trajectory sensitivity, synthesis load, parameter optimization

中图分类号:

TM 714

周海强, 张琦兵, 顾康慧. 基于轨迹灵敏度的动态等值模型参数分类优化方法[J]. 电力建设, 2015, 36(8): 29-33.

ZHOU Haiqiang, ZHANG Qibing, GU Kanghui. A Trajectory Sensitivity-Based Dynamic Equivalent Model Parameters Optimization Method[J]. ELECTRIC POWER CONSTRUCTION, 2015, 36(8): 29-33.

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基于轨迹灵敏度的动态等值模型参数分类优化方法

A Trajectory Sensitivity-Based Dynamic Equivalent Model Parameters Optimization Method

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