摘要
为评估新能源发电波动性对电网承载能力的影响,提出一套基于波动性分析与仿真技术的评估方法。通过对浙江省某新能源发电工程的数据进行采集与预处理,结合短时傅里叶变换(STFT)分析风电场与光伏电站的波动性特征,构建电网承载能力的动态仿真模型,进行频率稳定性、负荷分配及输电系统冲击的评估。研究结果表明,风电与光伏发电的波动性对电网的频率稳定性与负荷分配造成了显著影响。评估结果显示,风电场输出功率的波动幅度可达±37%,光伏电站波动幅度可达±47%,并导致电网频率偏移最大达到±0.42 Hz,超出安全范围。此外,备用电源的调用频次大幅增加,设备维护压力显著增大。由此可见,提出的评估方法为电网运行评价提供了可靠的参考,可以有效帮助应对新能源发电带来的不确定性挑战,提升电网的安全性与稳定性。
This study aims to evaluate the impact of the volatility of new energy generation on the carrying capacity of the power grid,and propose an evaluation method based on volatility analysis and simulation technology.This study collected and preprocessed data from a new energy generation project in Zhejiang Province,combined with Short-Time Fourier Transform(STFT)to analyze the fluctuation characteristics of wind farms and photovoltaic power stations,and constructed a dynamic simulation model of power grid carrying capacity to evaluate frequency stability,load allocation,and transmission system impact.The research results indicate that the volatility of wind and photovoltaic power generation has a significant impact on the frequency stability and load distribution of the power grid.The evaluation results show that the fluctuation amplitude of wind farm output power can reach±37%,and the fluctuation amplitude of photovoltaic power plants can reach±47%,leading to a maximum frequency deviation of±0.42 Hz in the power grid,exceeding the safe range.In addition,the frequency of calling backup power sources has significantly increased,leading to a significant increase in equipment maintenance pressure.From this,it can be seen that the evaluation method proposed in this study provides a reliable reference for the operation evaluation of the power grid,which can effectively help to cope with the uncertainty challenges brought by new energy generation and improve the safety and stability of the power grid.
作者
谢铖
高宇
郑怡
XIE Cheng;GAO Yu;ZHENG Yi(Zhejiang Electric Power Co.,Ltd.Pan′an County Power Supply Company,Jinhua 322300,China)
出处
《电工技术》
2025年第14期86-90,共5页
Electric Engineering
关键词
新能源发电
波动性
电网承载能力
评估技术
new energy generation
volatility
power grid carrying capacity
evaluation technology
