| 引用本文: | 傅中钰,唐宇,汪莹,辛焕海,胡光.考虑功率因数及相角差的新能源电力系统小扰动系统强度分析[J].电力自动化设备,2025,45(12):127-136. |
| FU Zhongyu,TANG Yu,WANG Ying,XIN Huanhai,HU Guang.Small-disturbance system strength analysis of renewable energy power system considering power factor and phase angle difference[J].Electric Power Automation Equipment,2025,45(12):127-136. |
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| 摘要: |
| 大规模海上风电受风资源时空波动性与集群化运行调度需求的影响，不同跟网型风电装备的运行功率因数与电压相角差呈现出显著的多样性，导致传统额定工况下的建模与稳定分析方法失效。为此，提出考虑实际工况下跟网型风电装备功率因数及电压相角差多样性的多馈入系统强度量化方法。建立计及功率因数及电压相角差多样性的多馈入系统的闭环模型，通过模态分析推导得到特征函数，并构造具有明确物理意义的特征子系统；基于特征子系统进一步提出实际工况广义短路比指标及适用于实际工程应用的系统强度量化方法。通过算例仿真验证所提方法的有效性，结果表明优化风电装备功率因数的分布特性并维持较小的电压相角差，是增强系统强度的2个关键因素。 |
| 关键词: 新能源电力系统 海上风电 特征子系统 系统强度 小扰动同步稳定性 广义短路比 功率因数 电压相角差 |
| DOI：10.16081/j.epae.202511004 |
| 分类号:TM712;TM614 |
| 基金项目:智能电网国家科技重大专项(2030)(2024ZD0801000)；国网浙江省电力有限公司科技项目(B311DS25000A) |
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| Small-disturbance system strength analysis of renewable energy power system considering power factor and phase angle difference |
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FU Zhongyu1, TANG Yu1, WANG Ying2, XIN Huanhai3, HU Guang3
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1.Polytechnic Institute, Zhejiang University, Hangzhou 310027, China;2.State Grid Economic and Technological Research Institute Co.,Ltd, Beijing 102209, China;3.College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
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| Abstract: |
| The large-scale offshore wind power is affected by the spatio-temporal fluctuation of wind resources and the demand of centralized operation and scheduling. The power factor and voltage phase angle difference of different grid-following wind power equipment show significant diversity, which leads to the failure of traditional modeling and stability analysis methods under rated operation conditions. To address this challenge, a quantification method of multi-infeed system strength considering the diversity of power factor and voltage phase angle difference of grid-following wind power equipment under actual operation conditions is proposed. The closed-loop model of multi-infeed system considering the diversity of power factor and voltage phase angle difference is established, the characteristic function is derived through modal analysis, and the characteristic subsystem with clear physical meaning is constructed. Based on the characteristic subsystem, the generalized short circuit ratio index under actual operation conditions and a system strength quantification method suitable for practical engineering application are further proposed. The effectiveness of the proposed method is verified through example simulation. The results show that optimizing the distribution cha-racteristics of wind power equipment’s power factor and maintaining a small voltage phase angle difference are two key factors for enhancing system strength. |
| Key words: renewable energy power system offshore wind power characteristic subsystem system strength small-disturbance synchronous stability generalized short circuit ratio power factor voltage phase angle difference |
