脉冲恒功率负载直流系统的切换稳定性分析  

Stability Analysis of Switched DC Power Supply System with Pulse Constant Power Load

作　　者：王勇 郭鑫 任晓琨 刘正春 王金全 WANG Yong;GUO Xin;REN Xiaokun;LIU Zhengchun;WANG Jinquan(Shijiazhuang Campus,Army Engineering University of PLA,Shijiazhuang 050003,China;College of National Defense Engineering,Army Engineering University of PLA,Nanjing 210007,China)

机构地区：[1]陆军工程大学石家庄校区,河北石家庄050003 [2]陆军工程大学国防工程学院,江苏南京210007

出　　处：《陆军工程大学学报》2024年第3期76-85,共10页Journal of Army Engineering University of PLA

摘　　要：带脉冲恒功率负载的直流供电系统(DC power supply system with pulse constant power load,PCPL-DCPS)运行过程随脉冲参数的变化包含多种不同运行状态。目前电力系统单模态大信号稳定性分析方法无法适用于中高频状态脉冲负载的稳定性分析。为此,提出了一种结合切换理论和混合势函数法的统一大信号稳定性分析方法。该方法以快慢切换驻留时间为界,划分了切换系统快慢切换稳定域,并以满足不同驻留时间为条件,提出不同域的大信号稳定性分析原则。以PCPL-DCPS为研究对象进行仿真试验,对比单模态稳定性判据和渐进稳定域域界,验证了快慢切换稳定域界划分和分析方法更合理,并进一步将切换系统稳定性与脉冲频率关联,得到了更为统一和直观的表达式。所述方法适用于全时段的切换电力系统,也可扩展应用到带脉冲负载的交流供电系统的稳定性研究中,进一步指导脉冲负载的峰值功率、脉冲频率等参数的选取。The direct current power supply system with pulse constant power load(PCPL-DCPS)has multiple different operating states as the pulse parameters change.However,the current method for largesignal stability analysis of power systems in a single mode is not applicable to the stability analysis of pulse loads with medium and high frequencies.To address this,a unified large-signal stability analysis method that combines switch theory and mixed potential function method is proposed in the paper.In the method,the fast and slow switch stability domains of switch systems are divided by the dwell time of fast and slow switching,and different principles for large signal stability analysis in different domains to meet different dwell time conditions are proposed.Taking PCPL-DCPS as a simulation experiment,the fast slow switch stability domain boundary division and analysis method are verified to be more reasonable.Furthermore,by correlating the stability of switch system with pulse frequency,a more unified and intuitive characterization formula is obtained.The method described in the paper is suitable for switched power systems throughout the entire time period,and can also be applied to the stability research of alternating current power supply systems with pulse loads,further guiding the selection of pulse loads parameters,such as peak power and pulse frequency.

关 键 词：脉冲恒功率负载 大信号稳定性分析 混合势函数法 切换系统 驻留时间 

分 类 号：TM712[电气工程—电力系统及自动化]