摘要
为提升直接法分析交直流混联电力系统暂态稳定的准确性,提出了一种考虑系统近似轨迹的交直流混联电力系统暂态能量计算方法。通过对交直流混联电力系统等值模型仿真得到系统近似故障响应轨迹,根据系统轨迹上直流端口电压、相角以及直流电流的取值确定直流端口传输功率,进而沿系统轨迹对直流端口功率进行积分,计算直流系统势能,提升了交直流混联电力系统暂态能量计算结果的准确性。分别运用所提方法和不计系统响应轨迹的能量函数计算方法对交直流混联电力系统测试算例进行分析,并与PSD-BPA时域仿真结果对比,验证了所提方法的优越性。
In order to improve the accuracy of the direct method to analyze the transient stability of the AC-DC hybrid power system,a transient energy calculation method of AC-DC power system considering approximate system trajectory is proposed.The approximate post-fault trajectory of AC-DC hybrid power system is obtained by simulating the equivalent model of the system,and the transmission power of the DC port is determined according to the values of DC port voltage,phase angle and DC current on the system trajectory.Then the DC port power is integrated along the system trajectory to calculate the potential energy of the DC system.The accuracy of transient energy calculation results of AC-DC hybrid power system is improved.The proposed method and the energy function calculation method without considering the system response trajectory are respectively used to analyze the test examples of AC-DC hybrid power system.Compared with the results of PSD-BPA time-domain simulation,the superiority of the proposed method is verified.
作者
陈星
黄天啸
吴翔宇
许寅
和敬涵
CHEN Xing;HUANG Tianxiao;WU Xiangyu;XU Yin;HE Jinghan(School of Electrical Engineering,Beijing Jiaotong University,Beijing 100044,China;North China Electric Power Research Institute,Beijing 100045,China)
出处
《电力自动化设备》
EI
CSCD
北大核心
2020年第9期102-109,共8页
Electric Power Automation Equipment
基金
华北电力科学研究院有限责任公司资助项目(考虑换流器暂态响应的交直流混联电网稳定性研究关键技术研究)(KJZ2019008)。
关键词
交直流混联电力系统
暂态稳定分析
高压直流输电
能量函数
响应轨迹
直接法
AC-DC hybrid power system
transient stability analysis
HVDC power transmission
energy func⁃tion
response trajectory
direct method
