摘要
分布式电源(DG)以及大量恒功率直流负荷接入交直流配电系统使得母线暂态电压表现出正负极耦合且多波动的特性,现有暂态电压稳定性评估方法准确率低且适用性较差。推导分析了双极交直流配电系统直流侧线路、负荷参数不平衡时影响系统母线暂态电压稳定的因素。基于二元表判据思想,提出一种改进的自适应母线暂态电压稳定性评估指标。针对参数不平衡时含DG的双极交直流配电系统,引入稳定性保持因子,提出母线与系统的暂态电压稳定裕度计算方法。基于所提方法利用MATLAB/Simulink仿真平台在改进的IEEE 33节点与IEEE 69节点双极交直流配电系统中量化影响系统暂态电压稳定性的因素,并对比验证了所提指标的有效性和优越性。
The integration of distributed generations(DGs)and a large number of constant power DC loads connected to double-pole AC/DC distribution system makes the bus transient voltage exhibit the coupling characteristics between positive and negative poles and multi-fluctuation.The existing evaluation methods of transient voltage stability keep low accuracy and poor applicability.The factors affecting the transient voltage stability of the system bus are deduced and analyzed when the DC-side lines and load parameters of the double-pole AC/DC distribution system are unbalanced.An improved adaptive evaluation index of transient voltage stability for bus is proposed based on two-element notation criterions.A stability maintenance factor is introduced for unbalanced double-pole AC/DC distribution system containing DGs,and a transient voltage stability margin calculation method for bus and system is proposed.The MATLAB/Simulink simulation platform is used to quantify the various factors affecting the transient voltage stability of the improved IEEE 33-bus and IEEE 69-bus double-pole AC/DC distribution systems based on the proposed method,which verifies the effectiveness and superiority of the proposed indicators.
作者
徐艳春
王霖
张涛
王凌云
MI Lu
XU Yanchun;WANG Lin;ZHANG Tao;WANG Lingyun;MI Lu(Hubei Provincial Key Laboratory for Operation and Control of Cascaded Hydropower Station,China Three Gorges University,Yichang 443002,China;Department of Electrical and Computer Engineering,Texas A&M University,College Station 77840,USA)
出处
《电力自动化设备》
北大核心
2025年第1期33-41,共9页
Electric Power Automation Equipment
基金
国家自然科学基金资助项目(52277108)。
