【作者】 刘家军； 闫泊； 姚李孝； 刘博； 刘栋； 薛美娟；

【Author】 LIU Jia-jun,YAN Bo,YAO Li-xiao,LIU Bo,LIU Dong,XUE Mei-juan (Institute of Water Resources and Hydro-electric Engineering,Xi’an University of Technology,Xi’an 710048,China)

【机构】 西安理工大学水利水电学院；

【摘要】 研究并网联络线上的功率波动对两端系统的安全稳定运行具有重要意义.该文从理论上分析了基于功率传递的电网间同期方式在并网过程中联络线上功率波动的机理和计算方法.在进行功率传递时,联络线上的功率波动取决于系统的指令功率和换流器控制系统的性能;并网合闸瞬间,影响系统联络线功率波动峰值的关键因素是两端系统的惯性常数之比和互联系统区域振荡模式的阻尼比.PSCAD仿真结果验证了理论分析的正确性。研究结论有助于掌握并网过程中联络线功率波动的动态特性,对提高并网装置的安全性和并网操作的可靠性具有积极意义。更多还原

【Abstract】 Study on Tie-line power fluctuation in paralleling based on power transmission have great significance on the safe and stable operation between both ends of the system.This paper analyzes mechanism and calculation methods of Tie-line power fluctuation in the process of paralleling.During the power transfer,Tie-line power fluctuation depends on the system commands and the performance of converter control system.At the moment of paralleling,what affect key factor of Tie-line power fluctuation peak are inertia constant ratio between both ends of the system and the damping ratio of connected Systems area oscillation modes.Simulation results in PSCAD verifies the correctness of theoretical analysis.The conclusion is helpful to study the dynamic characteristic of Tie-line power fluctuation in paralleling,and also have positive significance on improving safety of the device and reliability of paralleling operation.更多还原