基于虚拟同步补偿器的常规风电场“场站级”电压源型协同控制策略
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TM46

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新疆维吾尔族自治区科学技术厅-自然科学青年基金(2021D01C086)


Virtual Synchronous Compensator Coordination Control at Converter Station of the Wind Farm
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    摘要:

    为解决“双高”系统电压源缺失性及惯性和阻尼不够带来的电压稳定性问题,研究人员以构网变流器控制加储能技术为切入点,提出了风电场交流侧配备虚拟同步补偿器的解决方案。在直流侧配备储能,需要对整个风电场换代升级,经济性较差;在交流侧配备虚拟同步补偿器,虽升级简单,但采用独立控制策略,未从根本上解决新能源场站整体表现为电压源特性的问题。因此,文中提出了一个基于超级电容储能的虚拟同步补偿器协同控制方案,并充分考虑了超级电容储能容量的限制作用,该方案的有效性和可行性在MATLAB/Simulink仿真平台中进行了验证。结果表明:通过协同控制风电场与虚拟同步补偿超级电容的出力,能够在保证设备安全运行的前提下,整个风电场站表现出电压源特性,同时可为对风电场提供阻尼支撑作用。可见,超级电容额定功率为15%的风机额定功率时,其协同控制效果即可实现最佳风电波动性抑制和阻尼性能。

    Abstract:

    In order to solve the voltage instability issues attributing to the insufficient inertia and damping in the power system with high renewable and high power electronics penetration, based on the grid-forming control and electrical energy storage technologies,the strategy of the virtual synchronous compensator co-locating at the AC-side of the wind farm has been investigated. A modification on the wind farm is required if electrical energy storage is implemented at the DC side of the wind generator, which is costly, while the electrical energy storage can be implemented at the AC side, which is easy for the upgrading but the entire wind farm would not behave as a voltage source due to an independent control for the storage and wind generation. In this context, a coordination control strategy of the virtual synchronous compensator based on the supercapacitor has been proposed, considering the capacity limitation of the supercapacitor. The validation and feasibility of the proposed control has been verified in the Matlab/Simulink. The results show that by the means of the coordinating between the wind generation and virtual synchronous compensator, the entire wind farm can be behaved as a voltage source with inertia and damping provision. It is concluded that when the capacity of the virtual synchronous compensator takes up 15% of the wind farm capacity, the coordination control can optimally suppress the stochastics from the wind generation and maximize the damping of the entire wind farm.

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翟保豫,邸强,郝红岩,等. 基于虚拟同步补偿器的常规风电场“场站级”电压源型协同控制策略[J]. 科学技术与工程, 2023, 23(21): 9064-9072.
Zhai Baoyu, Di Qiang, Hao Hongyan, et al. Virtual Synchronous Compensator Coordination Control at Converter Station of the Wind Farm[J]. Science Technology and Engineering,2023,23(21):9064-9072.

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  • 收稿日期:2022-10-25
  • 最后修改日期:2023-07-05
  • 录用日期:2023-02-02
  • 在线发布日期: 2023-07-25
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