白鹤滩-江苏特高压混合级联直流工程数模仿真平台构建及特性研究  

Digital-analog Hybrid Simulation Platform Construction and Characteristic Research of Baihetan-Jiangsu Hybrid Cascaded UHVDC Project

作　　者：雷霄 杨立敏 朱艺颖 黄威博 崔校瑞 庞广恒 杨尚瑾 LEI Xiao;YANG Limin;ZHU Yiying;HUANG Weibo;CUI Xiaorui;PANG Guangheng;YANG Shangjin(China Electric Power Research Institute,Haidian District,Beijing 100192,China;State Grid Shanxi Electric Power Research Institute,Taiyuan 030001,Shanxi Province,China)

机构地区：[1]中国电力科学研究院有限公司,北京市海淀区100192 [2]国网山西省电力公司电力科学研究院,山西省太原市030001

出　　处：《电网技术》2024年第1期434-442,共9页Power System Technology

基　　金：国家电网有限公司科技项目(5100-202155345A-0-0-00):“多类型直流馈入的高比例新能源电力系统稳定特性及对策仿真研究”。

摘　　要：白(鹤滩)—江(苏)特高压直流输电工程是世界上第1个受端采用电网换相换流器(line-commutated converters,LCC)+模块化多电平换流器(modular multilevel converters,MMC)级联结构的实际工程,且受端分层接入4个交流馈入点。根据白江工程设计资料与实际参数,构建了包含与实际工程功能一致的MMC数字阀控系统、小步长现场可编程门阵列(field programmable gate array,FPGA)阀体仿真模型、直流实际控制保护装置的白江工程数模混合实时仿真平台,实现对白江工程百纳秒–微秒–毫秒级多时间尺度精准仿真。通过大量的功能性试验,以及与实际工程录波的一致性对比试验,验证了仿真平台的准确性;仿真分析了白江工程特殊结构和控制模式能在一定程度上提升对受端交流故障的抵御能力,可避免换相失败或降低换相失败的功率扰动,并改善受端故障引起送端交流过电压问题。本平台将继续应用于多回直流馈入华东的大电网数模混合仿真研究中。Baihetan-Jiangsu UHVDC transmission project is the first actual project in the world to adopt LCC+MMC cascade structure at the receiving end,and the receiving end is connected to four AC feed points in layers.In this paper,according to the design data and actual parameters of Baijiang project,a real-time simulation platform of digital/analog hybrid of Baijiang Project was constructed,which included MMC digital valve control system,FPGA valve body simulation model of small step length,and DC actual control and protection device,and realized accurate multi-time scale simulation of nanosecond-microsecond-millisecond level of Baijiang project.The accuracy of the simulation platform is verified by a large number of functional tests and consistency comparison tests with the actual engineering recording.The advantages of the special structure and control mode of Baijiang project in improving the resistance ability of the receiving end AC fault are simulated and analyzed,which can avoid commutation failure or reduce the power disturbance caused by commutation failure,and improve the AC overvoltage of the receiving end caused by the fault.This platform will continue to be applied in the research of digital-analog hybrid simulation of large power grid with multiple DC feeds into East China.

关 键 词：模块化多电平 高压直流输电 混合级联 换相失败 数模混合仿真 

分 类 号：TM721[电气工程—电力系统及自动化]