电力系统两阶段紧急切负荷控制智能预决策
Intelligent Pre-decision of Two-stage Emergency Load Shedding Control in Power Systems
胡泽 1曾令康 1姚伟 1石重托 1李晟 1汤涌 2文劲宇1
作者信息
- 1. 强电磁技术全国重点实验室(华中科技大学),湖北省 武汉市 430074
- 2. 中国电力科学研究院有限公司,北京市 海淀区 100192
- 折叠
摘要
电力系统仿真分析是安全稳定控制领域重要技术,可以用于制定与校验紧急控制措施.传统的人工分析仿真数据以决策紧急控制措施的工作模式严重依赖专家经验,在应用于复杂大电网时显得耗时耗力.该文提出一种两阶段紧急切负荷控制智能预决策方法,第一阶段决策切负荷点,第二阶段决策切负荷量.首先基于仿真数据,区分3 种电压失稳模式:纯电压失稳、耦合电压失稳和混合电压失稳,分别采用不同的负荷筛选方法;然后基于轻量级梯度提升机算法,根据仿真数据直接预估系统恢复稳定所需的切负荷总量,按负荷排序进行分配.结合暂稳仿真校验控制措施的有效性,调整决策量.以我国东北电网为例进行仿真研究,验证了在大电网紧急控制措施制定时,所提两阶段智能决策方法相比完全迭代试凑方法在有效性、快速性和准确性方面的优势.
Abstract
Power system simulation analysis is an important technology in the field of safety and stability control,which can be used to formulate and verify emergency control measures.The traditional manual analysis of simulation data to decide emergency control measures relies heavily on expert experience,which is time-consuming and labor-intensive when applied to complex large power grids.In this paper,a two-stage emergency load shedding control intelligent pre-decision method is proposed.The first stage decides the load shedding point,and the second stage decides the load shedding amount.Firstly,based on the simulation data,three voltage instability modes are distinguished:pure voltage instability,coupled voltage instability and mixed voltage instability,and different load screening methods are used respectively;Estimate the total amount of load shedding required for the system to restore stability,and allocate it according to the load order.Combined with the temporary stability simulation,the effectiveness of the control measures is verified,and the amount of decision-making is adjusted.Taking my country's Northeast Power Grid as an example,the simulation study verifies the advantages of the proposed two-stage intelligent decision-making method in terms of effectiveness,rapidity and accuracy compared with the fully iterative trial-and-error method when the emergency control measures of the large power grid are formulated.
关键词
电网仿真分析/暂态电压失稳/紧急控制/切负荷/轻量级梯度提升机Key words
power grid simulation analysis/transient voltage instability/emergency control/load shedding/light gradient boosting machine引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据