电力系统自动化2024，Vol.48Issue(3)：159-167,9.DOI:10.7500/AEPS20230715001
基于公式化限额和最小裕度最大化的电网热稳定限额计算
Thermal Stability Control Limit Calculation for Power Grid Based on Formulaic Control Limit and Maximization of Minimum Safety Margin
摘要
Abstract
Establishing the thermal stability control limit is a significant work for the power dispatching and control center and an important means to guarantee the safe operation of power grids.In order to address the problem that it is gradually difficult to establish thermal stability control limit due to the high uncertainty of power flows after the large-scale grid-connection of renewable energy,the power flow transfer relations are calculated and the power grid security constraints are established based on contingency analysis.Then,a three-stage thermal stability control limit calculation method for power grids based on the formulaic control limit and maximization of minimum safety margin is proposed to achieve the automatic calculation of thermal stability control limit.In the first stage,control limits of transmission channels are initialized.In the second stage,formulaic control limit requirements are established for those channels that are prone to overload after a contingency happens according to the criteria that power flow of the bottleneck equipment does not exceed its short-term current-carrying capacity after a contingency happens.In the third stage,the channel control limit is calculated successively according to the maximization principle of minimum safety margin for the set of channels with coupled transfer relation constraints.Both formulaic control limit and channel control limit requirements for the channels with tight transfer capacity can reduce the conservatism and fully release the transfer capacity of the channel.The control requirements can be reduced and simplified by establishing only channel control limit requirements for the remaining channels.Taking the summer peak operation mode of a regional power grid in 2023 as a case,the automatic limit calculation results are in good agreement with the stability regulations,which verifies the effectiveness of the proposed method.关键词
热稳定限额/公式化限额/预想故障/最小裕度最大化/冗余约束过滤Key words
thermal stability control limit/formulaic control limit/contingency/maximization of minimum safety margin/redundant constraint filtering引用本文复制引用
曾涛,陈浩,郭瑞鹏,汪震..基于公式化限额和最小裕度最大化的电网热稳定限额计算[J].电力系统自动化,2024,48(3):159-167,9.基金项目
国家自然科学基金资助项目(52077196). This work is supported by National Natural Science Foundation of China(No.52077196). （52077196）
