柔直接入场景下直驱风电机组电磁暂态仿真模型的阻抗特性误差研究  

Error Study for Impedance Characteristics of Electromagnetic Transient Simulation Models of Direct-Drive Wind Turbine Generators Under the Scenario Connecting to MMC-HVDC

作　　者：邓晓洋 吴林林 王潇 高磊[2] 吕敬[2] DENG Xiaoyang;WU Linlin;WANG Xiao;GAO Lei;LYU Jing(State Grid Jibei Electric Power Co.,Ltd.Research Institute,Beijing 100045,China;Key Laboratory of Control of Power Transmission and Conversion,Ministry of Education,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]国网冀北电力有限公司电力科学研究院,北京100045 [2]电力传输与功率变换控制教育部重点实验室(上海交通大学),上海200240

出　　处：《河北电力技术》2024年第6期2-10,共9页Hebei Electric Power

基　　金：国网冀北电力有限公司科技项目(52018K240009)。

摘　　要：我国大规模新能源并网系统的振荡问题经常发生,严重影响系统安全稳定运行。宽频阻抗扫描和电磁暂态仿真是实现系统宽频振荡风险评估的重要手段,其中新能源机组电磁暂态模型宽频阻抗特性的准确性、完备性将直接影响评估结果。以直驱风电机组接入柔性直流输电系统为例,建立直驱风电机组和柔直模块化多电平换流器交流侧的宽频阻抗模型,从阻抗特性角度揭示了柔直接入场景下直驱风电机组的宽频振荡机理。在此基础上,进一步分析了直驱风电机组的宽频阻抗特性,得出潜在的振荡风险频段及风险大小,利用数值一致性和趋势一致性指标给出了柔直接入场景下直驱风电机组电磁暂态仿真模型阻抗特性的误差要求。The oscillation problem of large-scale renewable energy grid-connected system still occurs frequently in China,which seriously impacts the safe and stable operation of the system.Wideband impedance scanning and electromagnetic transient simulation are important methods to achieve the risk assessment of wideband oscillation.The accuracy and completeness of the wideband impedance characteristics in the electromagnetic transient model of renewable energy units will directly influence the assessment outcomes.Taking the integration of direct-drive wind turbine generators into the modular multilevel converter-based high voltage direct current(MMC-HVDC)system as an example,the wideband oscillation mechanism are elucidated from the perspective of impedance characteristics through the establishment of wideband impedance models for direct-drive wind turbine generators and the MMC system.On this basis,the potential oscillation risk frequency ranges and the degree of the oscillation risk are identified through the further analysis of wideband impedance characteristics of direct-drive wind turbine generators.Error requirements for the impedance characteristics of electromagnetic transient simulation models of direct-drive wind turbine generators connecting to the MMC-HVDC system are proposed by using the indicators of the numerical consistency and trend consistency.

关 键 词：直驱风电机组 柔性直流输电 阻抗特性误差 数值一致性 趋势一致性 

分 类 号：TM721[电气工程—电力系统及自动化]