基于变参数减载控制的风电场一次调频策略

doi:10.11930/j.issn.1004-9649.202007200

中国电力 ›› 2021, Vol. 54 ›› Issue (12): 94-101.DOI: 10.11930/j.issn.1004-9649.202007200

基于变参数减载控制的风电场一次调频策略

王天翔¹, 程雪坤^2,3, 李伟超¹, 郑金鑫¹

1. 电网智能化调度与控制教育部重点实验室(山东大学)，山东济南 250061;
2. 国网冀北电力科学研究院(华北电力科学研究院有限责任公司)，北京 100045;
3. 风光储并网运行技术国家电网公司重点实验室，北京 100045

收稿日期:2020-08-04 修回日期:2021-06-08 出版日期:2021-12-05 发布日期:2021-12-16
作者简介:王天翔(1994-),男,硕士,从事风力发电并网与控制研究,E-mail:wtx94@163.com;程雪坤(1993-),女,硕士,从事新能源发电与控制、并网型风力发电机组控制研究,E-mail:chengxk027@126.com
基金资助:
国家电网公司科技项目(新能源主动支撑电网工程实用化控制技术并网适应性研究和应用，52010118000N)

Primary Frequency Control Strategy for Wind Farms Based on Variable Parameter De-loading Control

WANG Tianxiang¹, CHENG Xuekun^2,3, LI Weichao¹, ZHENG Jinxin¹

1. Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education (Shandong University), Jinan 250061, China;
2. State Grid Jibei Electric Power Research Institute (North China Electric Power Research Institute Co., Ltd.,), Beijing 100045, China;
3. Key Laboratory of Wind Energy Storage Grid Connected Operation Technology, State Grid Corporation of China, Beijing 100045, China

Received:2020-08-04 Revised:2021-06-08 Online:2021-12-05 Published:2021-12-16
Supported by:
This work is supported by Science and Technology of SGCC (Research and Application of Renewable Energy Active Supporting Grid Practical Control Technology and Grid-connection Adaptability, No.52010118000N)

摘要/Abstract

摘要： 变速恒频风机通过电力电子设备实现并网，导致机组转速与系统频率不再有耦合关系，无法主动响应系统频率变化。针对风电大规模并网引发的系统调频安全问题，采用优先减载低风速机组的风电场预留备用策略，并结合桨距角控制，实现满足系统备用需求，同时最大限度地储存旋转动能；然后提出了变调频系数的虚拟惯量控制策略，给出了下垂系数的整定方法，以实现风机减载功率充分释放，为系统提供可靠的调频功率支持。在DIgSILENT中建立了系统仿真模型，结果表明：所提策略能够合理分配风机的减载功率，并有效利用备用容量参与系统调频，提升了风机的频率控制能力。

关键词: 风电场, 一次调频, 预留备用, 减载控制, 下垂控制, 变参数控制

Abstract: Variable speed constant frequency (VSCF) wind turbines are connected to the grid through power electronic equipment, leading to the decoupling of wind turbine’s rotor speed and system frequency. As a result, the wind turbines cannot actively respond to the changes of system frequency. To cope with the system frequency stability problem resulting from large-scale integration of wind power, a new active power control strategy for wind farms is proposed, which preferentially applies overspeed de-loading control to wind turbines operating in low wind speed zone. Accordingly, the kinetic energy stored in the rotating mass of wind turbines can be maximized. In the meantime, the reserve demand of the system required by the transmission system operator can be met by applying pitch angle control to wind turbines operating in high wind speed zone. Furthermore, a virtual inertial control strategy with variable parameters is proposed, and the droop coefficient is tuned to ensure the full release of the reserve power of the wind turbines during the system frequency regulation. A system simulation model is built in the DIgSILENT, and the simulation results show that the proposed strategy can reasonably allocate the reserve power of wind turbines and effectively use the reserve power to respond to the frequency change of the system, thus improving the frequency control capabilities of the wind turbines.

Key words: wind farm, primary frequency control, active power allocation, de-loading control, droop control, variable parameter control

王天翔, 程雪坤, 李伟超, 郑金鑫. 基于变参数减载控制的风电场一次调频策略[J]. 中国电力, 2021, 54(12): 94-101.

WANG Tianxiang, CHENG Xuekun, LI Weichao, ZHENG Jinxin. Primary Frequency Control Strategy for Wind Farms Based on Variable Parameter De-loading Control[J]. Electric Power, 2021, 54(12): 94-101.

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基于变参数减载控制的风电场一次调频策略

Primary Frequency Control Strategy for Wind Farms Based on Variable Parameter De-loading Control

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基于变参数减载控制的风电场一次调频策略

Primary Frequency Control Strategy for Wind Farms Based on Variable Parameter De-loading Control

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