中国电机工程学报2024，Vol.44Issue(19)：7567-7579,中插7,14.DOI:10.13334/j.0258-8013.pcsee.230465
考虑随机-极端扰动的新型电力系统一次调频备用优化
Primary Frequency Reserve Optimization of New Power System Considering Stochastic-extreme Disturbance
摘要
Abstract
With the penetration of the high proportion of renewable energy sources with weak support capacity,the frequency stability of new power systems has become a research hotspot.This paper studies the optimization problem of primary frequency regulation reserve considering random-extreme disturbance.Specifically,the frequency response model of multi-machine system is taken as the analysis object,and the disturbance is modeled as the sum of Gaussian white noise random disturbance and conventional step active power disturbance.Then,in order to analyze the influence of the linear and saturated states of the governor on the frequency dynamics,the frequency response model of the multi-machine system is aggregated into a piecewise linear single-machine equivalent frequency response model,and a time-domain stochastic differential equation(SDE)model of frequency dynamics is constructed.The mean and standard deviations of frequency dynamics are analyzed.The expressions of mean and standard deviation of frequency extreme points after disturbance are derived,and the analytical relationship between the confidence level and the frequency extreme point is established,that is,the probabilistic expression of frequency stability constraint considering random disturbance is established.The optimization model of primary frequency regulation reserve is established by applying the hyperplane linear approximation method to the frequency stability constraint.Finally,the effectiveness of the proposed method is verified by IEEE 39 bus system.关键词
随机过程/一次调频/频率稳定/随机-极端扰动Key words
stochastic process/primary frequency regulation/frequency stability/stochastic-extreme disturbance分类
信息技术与安全科学引用本文复制引用
李瑶,王程,毕天姝..考虑随机-极端扰动的新型电力系统一次调频备用优化[J].中国电机工程学报,2024,44(19):7567-7579,中插7,14.基金项目
国家自然科学基金项目(52177079) （52177079）
国家电网有限公司科技项目(SGXJ0000FCJS2100539). Project Supported by National Natural Science Foundation of China(52177079) （SGXJ0000FCJS2100539）
Science and Technology Project of State Grid Corporation of China(SGXJ0000FCJS2100539). （SGXJ0000FCJS2100539）
