楼伯良,周华,陆韶琦,华文,应超楠,徐政
LOU Boliang,ZHOU Hua,LU Shaoqi,HUA Wen,YING Chaonan,XU Zheng

• 1:国网浙江省电力有限公司电力科学研究院
• 2:国网浙江省电力有限公司
• 3:浙江大学电气工程学院

摘要(Abstract)：

在对直流输电系统进行动态性能测试与计算过电压特性时,需采用电磁暂态计算模式,这就面临着交流系统简化的问题。由于只要保证扰动发生短期内的动态响应,因此提出采用多端口戴维南等值结构简化原大电网的方法。根据暂态稳定仿真得到的多馈入相互作用因子与短路电流计算,可以辨识简化系统的节点阻抗矩阵,根据对应于阻抗矩阵的导纳矩阵,求解等值结构中未知的线路与电源阻抗参数;用二次规划的方法使等值系统逼近原系统的潮流,可以得到多端口等值系统。以浙江电网2019年规划数据为例进行交流系统的简化,仿真比较了等值系统与简化系统的动态响应,验证了所提多端口简化方法的有效性。
In dynamic performance test of the HVDC transmission system and the overvoltage characteristics calculation, electromagnetic transient analysis is needed, and therefore the AC system reduction is inevitable.It is required to maintain the dynamic response in the short term of disturbance, multi-port Thevenin equivalent structure is adopted to simplify the original large power grid. By multi-infeed interactive factors from transient stability simulation and short-circuit current calculation, the node impedance matrix can be obtained;according to the admittance matrix obtained by the impedance matrix, unknown lines and power impedance parameters in the equivalent structure are solved; the power flow of the equivalent system is enabled to be the same as that of the original system by quadratic programming to conclude a multi-terminal equivalent system.The plan data of Zhejiang power grid in 2019 is taken as an example for communication system reduction. The dynamic responses of equivalent system and reduced system are simulated and compared to verify the multiterminal reduction method.

关键词(KeyWords)： 大规模交直流电力系统;相互作用因子;多端口简化;短路电流;二次规划
large scale AC/DC power system;interactive factor;multi-terminal simplification;short-circuit current;quadratic programming

Abstract:

Keywords:

基金项目(Foundation): 国网浙江省电力有限公司科技项目(5211DS16001S)

作者(Author): 楼伯良,周华,陆韶琦,华文,应超楠,徐政
LOU Boliang,ZHOU Hua,LU Shaoqi,HUA Wen,YING Chaonan,XU Zheng

DOI: 10.19585/j.zjdl.201811004

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