2025年4月5日 周六
首页 > 过刊浏览>2021年第36卷第5期 >61-71. DOI:10.19781/j.issn.1673-9140.2021.05.008
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大规模新能源并网下SVG协同风电场的电压精细化控制策略
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[cstr]
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TM761+.1

基金项目:

国家自然科学基金(51777176)；云南电网有限责任公司科技项目(056200KK52180067)


Research on meticulous voltage cooperative control strategy between SVG and wind farm under the integration of large-scale renewable energy
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    摘要:

    新能源大规模并网下,区域电压合格率降低的问题越来越显著,其主要原因是新能源自身不稳定性和有待改进的控制策略。首先以提高区域电压精度和稳定性为目的,详细计算 DFIG无功限度,并考虑过电流因素,进一步更正 DFIG无功下限;然后改进 DFIG机组控制结构,将 GSC无功容量计入 DFIG无功补偿中,使风电场在保留最大有功的同时,深度发掘无功潜能,提高风电场无功补偿能力,并结合 SVG 设计出协调控制策略,既能保留 SVG 灵活补偿能力,又可使风电场提供无功支撑,分担SVG补偿负担;最后通过分析灵敏度、无功裕度等参数,设计区域无功调配策略,进一步完善电压精细化控制策略,并通过两区域并网系统验证整套控制理论。

    Abstract:

    With theintegration of large-scale renewable energythe problem of the reduction of the regional voltage qualification rate becomes more significant than ever before because of the stability issues and the poor control performance of the renewable energies.In order to improve the accuracy and stability of the regional voltage, this paper investigates the reactive power limit of DFIGsby detailed calculation.The overcurrent factor is taken into account to further correct the reactive power lower limit of DFIGs.Thenthe control structure of DFIGs is improved by considering the reactive power capacity of GSCs in the DFIG reactive power compensation. Hence the reactive power compensation capability of the wind farm can be deeply exploited and the maximum active power would not be affected. In addition, a coordinated control strategy of wind farms and SVG is proposed, which can not only retain the flexible compensation capability of SVG, but also enable the wind farm to provide reactive power support and share the burden of SVG compensation.Finally, by analyzing parameters such as sensitivity and reactive power remaining, this paper designs a regional reactive power allocation strategy, which can further improve the voltage control performance. The control performance is verifiedthrough a two-area power systems with the integration of wind farms.

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向川,畅昶,周鑫,等.大规模新能源并网下SVG协同风电场的电压精细化控制策略[J].电力科学与技术学报,2021,36(5):61-71.
Xiang Chuan, Chang Chang, Zhou Xin, et al. Research on meticulous voltage cooperative control strategy between SVG and wind farm under the integration of large-scale renewable energy[J]. Journal of Electric Power Science and Technology,2021,36(5):61-71.

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