EN基于LLC谐振型变换器的海上直流风电机组电压源等效模型
Voltage source equivalent model of offshore direct current wind turbine based on LLC resonant converter
- 中国电力 2026年59卷第1期 页码：143-152
- 作者机构：
1. 南京理工大学 自动化学院,江苏,南京,210094
2. 中国科学院 电工研究所,北京,100190
3. 中国华能集团清洁能源技术研究院有限公司,北京,102209
- 作者简介：
- 基金信息：国家重点研发计划资助项目（海上风电场直流集电关键技术及应用示范，2023YFB4204700）。
DOI：10.11930/j.issn.1004-9649.202501008
中图分类号：-
网络出版：2026-01-13，
纸质出版：2026-01-13
- 稿件说明：
移动端阅览
宁宇杰, 胡书举, 陈怡静, 李春华, 李丰林, 赵大伟. 基于LLC谐振型变换器的海上直流风电机组电压源等效模型[J]. 中国电力, 2026, 59(1): 143-152.
宁宇杰, 胡书举, 陈怡静, et al. Voltage source equivalent model of offshore direct current wind turbine based on LLC resonant converter[J]. 2026, 59(1): 143-152.
宁宇杰, 胡书举, 陈怡静, 李春华, 李丰林, 赵大伟. 基于LLC谐振型变换器的海上直流风电机组电压源等效模型[J]. 中国电力, 2026, 59(1): 143-152. DOI： 10.11930/j.issn.1004-9649.202501008.
宁宇杰, 胡书举, 陈怡静, et al. Voltage source equivalent model of offshore direct current wind turbine based on LLC resonant converter[J]. 2026, 59(1): 143-152. DOI： 10.11930/j.issn.1004-9649.202501008.
摘要
采取直流汇集方案的海上风电场，可避免海底电缆容升效应导致的过电压问题，同时无需笨重的工频变压器，是未来发展的重要方向。首先，建立了基于LLC谐振型变换器的海上直流风电机组详细模型，设计了机组整体的控制策略；然后，基于变换器平均值模型，结合LLC谐振变换器工作原理，对详细模型进行简化得到了电压源等效模型；最后，在不同工况下，对电压源等效模型、详细模型和已有研究建立的电流源等效模型的动态特性进行了分析比较，验证了前者的准确性。所建模型对于开展海上直流风电场接入大电网的稳定分析工作具有实用参考价值。
Abstract
Offshore wind farms adopting a DC collection scheme can avoid overvoltage problems caused by the capacitive charging effect of undersea cables
and also eliminate the need for bulky power-frequency transformers
representing an important direction for future development. This paper firstly establishes a detailed model of an offshore direct current (DC) wind turbine based on the LLC resonant converter and designs an integrated control strategy for the turbine unit. Then
based on the averaging model and the operating principles of the LLC resonant converter
the detailed model is simplified to obtain an equivalent voltage source model. Finally
a comparative analysis of the dynamic characteristics is conducted under various operating conditions among the equivalent voltage source model
the detailed model
and the existing current source equivalent model established in previous studies
verifying the accuracy of the former. The established model holds practical reference value for conducting stability analysis on the integration of offshore DC wind farms into the main power grid.
关键词
Keywords
references
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