电力系统保护与控制2025，Vol.53Issue(15)：36-47,12.DOI:10.19783/j.cnki.pspc.241331
火电机组一次调频简化模型改进与电力系统频率安全约束解析计算
Improvement of simplified primary frequency regulation model for thermal power units and analytical calculation of power system frequency security constraints
摘要
Abstract
With the increasing penetration of renewable energy and power electronic devices in modern power systems,frequency security has become one of the bottlenecks affecting safe and stable power system operation.In order to meet the analytical needs from the grid-side for frequency response in large-scale power systems,the simplified model of primary frequency regulation(PFR)for thermal power units employed in the existing analytical methods is first improved.A second-order simplified model is established,which comprehensively considers the characteristics of the load feedback control,valve position limitation,and the influence of steady-state main steam pressure.Then,to accurately reflect the real PFR characteristics of units under different operating conditions,an online method for determining PFR model parameters is proposed based on real-time steady-state operating data.Finally,to enable analytical calculation of system frequency security constraints,the average system frequency model is treated as an open-loop system.By integrating the simplified PFR model into the open-loop average system frequency model,an analytical method for calculating the frequency security constraints is developed.Simulation results indicate that the proposed simplified model and analytical method for frequency security assessment can effectively evaluate the frequency security characteristics with high accuracy.关键词
系统频率响应/一次调频/火电机组/频率安全约束Key words
system frequency response/primary frequency regulation/thermal power unit/frequency security constraint引用本文复制引用
黄怡涵,王小海,张红光,陈磊,郝玲,杨志国..火电机组一次调频简化模型改进与电力系统频率安全约束解析计算[J].电力系统保护与控制,2025,53(15):36-47,12.基金项目
This work is supported by the National Natural Science Foundation of China(No.52207115). 国家自然科学基金项目资助(52207115) （No.52207115）
内蒙古电力(集团)有限责任公司科技项目资助(发文号:内电科创[2024]5号) （集团）
