100%新能源电源经柔性直流送出系统的机电暂态建模仿真研究  

Research on Electromechanical Transient Modeling and Simulation of 100%New Energy Power Source Connected by MMC-HVDC

作　　者：苏寅生[1] 赵利刚 姚海成[1] 王长香 李豹[1] 甄鸿越 高琴 周挺辉 黄冠标 SU Yinsheng;ZHAO Ligang;YAO Haicheng;WANG Changxiang;LI Bao;ZHEN Hongyue;GAO Qin;ZHOU Tinghui;HUANG Guanbiao(CSG Power Dispatching Control Center,Guangzhou,Guangdong 510663,China;CSG Electric Power Research Institute Co.,Ltd.,Guangzhou,Guangdong 510663,China)

机构地区：[1]中国南方电网电力调度控制中心,广东广州510663 [2]直流输电技术国家重点实验室(南方电网科学研究院有限责任公司),广东广州510663

出　　处：《广东电力》2023年第10期57-65,共9页Guangdong Electric Power

基　　金：国家自然科学基金项目(U22B2097);中国南方电网有限责任公司科技项目(ZDKJXM20200029)。

摘　　要：100%新能源电源经柔性直流送出系统是一种新能源基地送出的重要形式,目前常用的机电暂态仿真软件尚无对应算法与模型可对其进行建模仿真。为此,分析100%新能源电源经柔性直流送出系统的基本控制原理,提出无同步机情况下“新能源+柔性直流系统”的机电暂态仿真一般结构,建立此系统中柔性直流输电系统的电压频率(Vf)控制模型,柔性直流采用电压源模型接入,以解决电流源模型接入时易产生的数值振荡问题。基于DSP软件建立仿真模型,构建直驱风电机组、光伏发电经柔性直流送出系统的仿真案例,将所建立模型与PSCAD电磁暂态模型进行仿真结果比对,同时开展所建立模型在新能源功率波动和系统短路故障等不同扰动情况下的响应分析,仿真结果验证了所提建模方法的有效性。100%new energy power generation connected by MMC-HVDC is an important form of new energy base transmission,while currently,there are no corresponding algorithms or models in commonly used software to model and simulate it.Therefore,this paper analyzes the basic control principle of 100%new energy power generation connected by MMC-HVDC,and proposes a general structure for electromechanical transient simulation of 100%new energy power generation connected by MMC-HVDC without a synchronous machine.A Vf(voltage-frequency)control model for the MMC-HVDC transmission system in this system is established,and the numerical oscillation problem prone to occur when the current source model is used is solved by using a voltage source model.The paper also establishes a simulation model based on DSP software and constructs simulation cases of the PMSG,PV,MMC-HVDC system.Afterwards,it carries out the simulation comparison between the established model with the PSCAD electromagnetic transient model,and the response analysis of the established model under different disturbances such as new energy power fluctuations and system short-circuit faults.The simulation results verifies the effectiveness of the proposed modeling method.

关 键 词：100%新能源电源 柔性直流 机电暂态 建模仿真 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM712.12