电力系统保护与控制2024，Vol.52Issue(9)：79-87,9.DOI:10.19783/j.cnki.pspc.231135
计及调速系统详细模型和调频备用的大扰动下频率最低值预测方法
Frequency nadir prediction for large disturbances in power systems considering detailed governor system models and frequency regulation reserves
摘要
Abstract
With the increasing proportion of renewable energy in the power system,system inertia decreases,and frequency control resources become scarcer,posing a severe challenge to system frequency stability.Therefore,in this context of ever-changing operation scenarios,it is particularly important to rapidly and accurately assess the power system frequency security indices when there are large power disturbances.Specifically,the frequency nadir,which has a highly nonlinear and unexpressed quantitative relationship with multiple parameters,making it difficult to predict accurately and quickly,is a research focus in the power system frequency security assessment.However,current methods for rapidly predicting the frequency nadir do not adequately consider the impact of frequency regulation reserves.This paper,based on a parabolic approximation of system frequency deviation for the average system frequency(ASF)model,presents an open-loop decoupling approach.This approach allows for the quantification of the relationship between the system frequency nadir and governor output power while accounting for frequency regulation reserves.Ultimately,it facilitates the rapid prediction and evaluation of the frequency nadir,considering the impact of frequency regulation reserves.The accuracy of this method is validated through case studies on a small system and the ACTIVSg2000 system,with prediction accuracies of 99.28%and 97.71%,respectively.This method is important for addressing issues related to unit commitments with frequency safety constraints,evaluating the effectiveness of frequency stability control measures,and assessing the operational capacity of new energy sources within systems subject to such constraints.关键词
频率最低值/调频备用/一次调频响应/ASF模型开环解耦Key words
frequency nadir/frequency regulation reserve/primary frequency response/open-loop decoupling of ASF model引用本文复制引用
莫维科,严焕斌,赵天阳,陈皓勇..计及调速系统详细模型和调频备用的大扰动下频率最低值预测方法[J].电力系统保护与控制,2024,52(9):79-87,9.基金项目
This work is supported by the National Key Research and Development Program of China:Key Technologies on Intelligent Dispatch of Power Grid under 20%New Energy Integration Scenario(No.2022YFB2403503). 国家重点研发计划项目"支撑20%新能源电量占比场景下的电网智能调度关键技术"(2022YFB2403503)资助 （No.2022YFB2403503）
