海上风电经交流电缆汇集送出系统暂态无功电压建模及特性分析

doi:10.11930/j.issn.1004-9649.202101108

中国电力 ›› 2022, Vol. 55 ›› Issue (4): 166-174.DOI: 10.11930/j.issn.1004-9649.202101108

海上风电经交流电缆汇集送出系统暂态无功电压建模及特性分析

孙艳霞¹, 方是文², 李震²

1. 新能源与储能运行控制国家重点实验室（中国电力科学研究院有限公司），北京 100192;
2. 北京理工大学自动化学院，北京 100081

收稿日期:2021-01-22 修回日期:2022-01-13 出版日期:2022-04-28 发布日期:2022-04-24
作者简介:孙艳霞（1980—），女，硕士，高级工程师，从事新能源并网与仿真技术研究，E-mail：283041664@qq.com;方是文（1994—），男，博士研究生，通信作者，从事新能源并网发电技术研究，E-mail：1787421016@qq.com
基金资助:
国家电网有限公司科技项目（风电机组/光伏发电单元仿真模型参数整定及校核技术研究，4000-201955407 A-0-0-00）。

Transient Voltage-Reactive Power Modeling of Offshore Wind Power Collection and Transmission System with AC Cables and Characteristic Analysis

SUN Yanxia¹, FANG Shiwen², LI Zhen²

1. State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems (China Electric Power Research Institute), Beijing 100192, China;
2. School of Automation, Beijing Institute of Technology, Beijing 100081, China

Received:2021-01-22 Revised:2022-01-13 Online:2022-04-28 Published:2022-04-24
Supported by:
This work is supported by Science and Technology Project of SGCC (Research on Electromagnetic Transient Model Calibration Techniques Based on Control Codes for Wind Turbine/Photovoltaic Power Units, No. 4000-201955407 A-0-0-00).

摘要/Abstract

摘要： 海上风电经交流电缆汇集送出系统送端暂态过电压威胁系统安全稳定运行，为定量分析暂态电压对海上风电机组的影响，指导海上风电无功电压控制系统配置，亟须研究海上风电经交流电缆汇集送出系统暂态无功电压模型。首先，分析计及交流电缆的送出系统等效网络特性，明确等效网络呈现感性与容性特性的边界条件；然后，基于等效网络容性特性，建立计及交流电缆的海上风电暂态无功电压数学模型，基于控制硬件在环（control hardware in the loop，CHIL）实时仿真实验平台，验证了数学模型的正确性；最后，基于海上风电暂态无功电压模型，定量分析交流电缆线路长度、风电机组网侧变流器电流环控制带宽与阻尼比对机端暂态过电压的影响规律，为定量评估海上风电经交流电缆汇集送出系统暂态过电压运行风险奠定了理论基础。

关键词: 海上风电, 交流电缆, 暂态过电压, 数学模型, 实时仿真

Abstract: The transient overvoltage at the sending terminal of the offshore wind power collection and transmission system with AC cables threatens the safe and stable operation of the system. To quantitatively analyze the impact of transient voltage on offshore wind turbines and thereby guide the configuration of the voltage-reactive power control system for offshore wind power, we need to develop a transient voltage-reactive power model of the offshore wind power collection and transmission system with AC cables as soon as possible. This paper approaches this problem by analyzing the characteristics of the equivalent network of the transmission system considering AC cables and clarifying the boundary conditions for the equivalent network to demonstrate inductive characteristics or capacitive ones. Then, for the case of the equivalent network displaying capacitive characteristics, we build a mathematical transient voltage-reactive power model of offshore wind power considering AC cables and verify the validity of the mathematical model on the control hardware in the loop (CHIL) based real-time simulation experiment platform. Finally, with the transient voltage-reactive power model of offshore wind power, we quantitatively analyze the influences of AC cable line length and the control bandwidth and damping ratio of the current loop in the wind turbine grid-side converter (GSC) on transient overvoltage at the generator terminal to lay a theoretical foundation for quantitatively assessing the risk of transient overvoltage in the offshore wind power collection and transmission system with AC cables.

Key words: offshore wind power, AC cable, transient overvoltage, mathematical model, real-time simulation

孙艳霞, 方是文, 李震. 海上风电经交流电缆汇集送出系统暂态无功电压建模及特性分析[J]. 中国电力, 2022, 55(4): 166-174.

SUN Yanxia, FANG Shiwen, LI Zhen. Transient Voltage-Reactive Power Modeling of Offshore Wind Power Collection and Transmission System with AC Cables and Characteristic Analysis[J]. Electric Power, 2022, 55(4): 166-174.

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海上风电经交流电缆汇集送出系统暂态无功电压建模及特性分析

Transient Voltage-Reactive Power Modeling of Offshore Wind Power Collection and Transmission System with AC Cables and Characteristic Analysis

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海上风电经交流电缆汇集送出系统暂态无功电压建模及特性分析

Transient Voltage-Reactive Power Modeling of Offshore Wind Power Collection and Transmission System with AC Cables and Characteristic Analysis

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