| 引用本文: | 江守其,徐亚男,李国庆,辛业春,王丽馨.提升海上风电经柔直联网系统频率稳定性的协调控制策略[J].电力自动化设备,2023,43(9):194-201. |
| JIANG Shouqi,XU Yanan,LI Guoqing,XIN Yechun,WANG Lixin.Coordinated control strategy for improving frequency stability of MMC-HVDC connecting offshore wind power[J].Electric Power Automation Equipment,2023,43(9):194-201. |
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| 摘要: |
| 针对大规模海上风电经柔直联网引起的受端电网惯量降低、频率调节能力下降等问题，提出了海上风电与柔直主动支撑系统频率的协调控制策略。在惯量支撑方面，利用直流电容能量主动支撑系统惯量，并通过直流电压建立风机转速与频率的耦合关系，提出了基于差异化转子动能调节的风电场惯量支撑协调控制策略，以提升受端电网惯量水平。在频率偏差调节方面，根据本地直流电压偏差量，提出了基于风机变速控制与桨距角控制的风电场一次调频策略，并设计了基于附加桨距角控制的风电场二次调频策略，以提高系统的频率稳定性。最后，设计了多时间尺度频率支撑控制策略的协调配合流程，并基于RT-LAB OP5600实时数字仿真平台验证了所提策略可有效提升系统的频率支撑能力。 |
| 关键词: 海上风电经柔直联网系统 惯量支撑 一次调频 二次调频 协调控制策略 |
| DOI：10.16081/j.epae.202304022 |
| 分类号: |
| 基金项目:国家电网公司总部科技项目(5108-202299258A-1-0-ZB) |
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| Coordinated control strategy for improving frequency stability of MMC-HVDC connecting offshore wind power |
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JIANG Shouqi, XU Yanan, LI Guoqing, XIN Yechun, WANG Lixin
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Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology, Ministry of Education, Northeast Electric Power University, Jilin 132012, China
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| Abstract: |
| Aiming at the problems of reduced inertia and reduced frequency regulation capability of receiving-end AC grid caused by modular multilevel converter based high voltage direct current(MMC-HVDC) connecting large-scale offshore wind power, a coordinated control strategy of offshore wind power and MMC-HVDC is proposed to actively support system frequency. In terms of inertia support, using the energy of DC capacitor to actively support the system inertia, and establishing the coupling relationship between fan speed and frequency through DC voltage, a differential rotor kinetic energy regulation based coordinated control strategy of wind farm is proposed to support inertia, so as to improve the inertia level of the receiving-end grid. In terms of frequency deviation regulation, according to the local DC voltage deviation, the primary frequency regulation strategy of wind farm based on fan speed control and pitch angle control is proposed, and the secondary frequency regulation strategy of wind farm based on additional pitch angle control is designed to improve the frequency stability of system. Finally, the coordination process of multi-time scale frequency support control strategy is designed, and based on the RT-LAB OP5600 real-time digital simulation platform, it is verified that the proposed strategy can effectively improve the frequency support capability of the system. |
| Key words: MMC-HVDC connecting offshore wind power inertia support primary frequency regulation secondary frequency regulation coordinated control strategy |
