含换流器型电源电力系统的短路计算方法  

Short-circuit Current Calculation Method for Power System with Converter-interfaced Generator

作　　者：翁华 朱维骏 张旭[2] 郁丹 杨亚楠 李宇骏 唐人 WENG Hua;ZHU Weijun;ZHANG Xu;YU Dan;YANG Yanan;LI Yujun;TANG Ren(Zhejiang Huayun Electric Power Engineering Design Consulting Co.,Ltd.,Hangzhou 310006,China;School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]浙江华云电力工程设计咨询有限公司,浙江杭州310006 [2]西安交通大学电气工程学院,陕西西安710049

出　　处：《智慧电力》2023年第1期16-23,共8页Smart Power

基　　金：国家自然科学基金资助项目(U2066602);浙江华云电力工程设计咨询有限公司科技项目(2021C1D08P02)。

摘　　要：随着分布式发电技术的快速发展,大量换流器型电源接入电网。其在故障暂态下控制模式的不确定性为现代电力系统的短路电流计算提出了新的挑战。首先,忽略了控制器的快速响应过程,建立了考虑控制模式切换的换流器型电源的故障分析模型,每种控制下的换流器故障动态均可通过等式约束和不等式约束进行描述。其次,提出了一种交替迭代算法,通过交替执行计算模块和判别模块来实现故障网络的求解。最后,利用PSCAD/EMTP软件验证了所提算法在不同故障位置和过渡电阻下的有效性。With the rapid development of distributed generation technology,a large number of converter-interfaced generators(CIGs)are connected to power grids. Meanwhile,its uncertainty of the control mode during fault transient poses a new challenge to the short-current calculation of modern power system. Firstly,this paper ignores the fast dynamic process of controllers and establishes a fault analysis model of CIG considering control mode switching. It indicates that the fault dynamic of CIG with each control mode can be depicted by equality and inequality constraints. Based on the model,one novel alternative iteration algorithm is proposed to solve the fault network by alternately executing the calculation module and discrimination module. Finally,PSCAD/EMTP is utilized to verify the effectiveness and accuracy of the proposed algorithm under various fault locations and transition resistances.

关 键 词：短路电流计算 控制模式切换 换流器型电源 低电压穿越 

分 类 号：TM711[电气工程—电力系统及自动化]