摘要
通过附加频率控制,柔性直流输电(voltage source converter based high voltage direct current,VSCHVDC)参与电网调频,其快速控制特性可改善调频效果。文章基于潮流模型,计及同步发电机转子运动方程及调速系统,推导发电机转速与负荷扰动关系;考虑VSC-HVDC附加有功-频率下垂控制,提出电网暂态频率解析模型。IEEE 14节点算例分析表明,VSC-HVDC确实可改善暂态频率;量化解析模型和时域仿真结果误差验证了前者的准确性;比较两者误差计算时间,验证解析模型计算效率;修改VSC-HVDC附加控制器参数,验证解析模型在不同运行条件下的适用性。
With additional frequency controller, the voltage source converter based high-voltage direct- current（VSC-HVDC） may participate in system frequency regulation, whose fast control improves frequency regulation effect. Based on power flow model and including the motion equation and gover- nor system of the synchronous generators, the rotor speed following load disturbance is derived. Based on the power-frequency droop control to VSC-HVDC, the analytical model to quantify the tran- sient frequency of power system is proposed. The numerical results on IEEE 14-bus test system show that the VSC-HVDC helps to improve the transient frequency; accuracy of the analytical model is vali- dated by quantifying its error with the time-domain results; efficiency of the analytical model is valida- ted by comparing the calculation time of both models; feasibility of the analytical model under various operational conditions is validated by changing the control parameters of the VSC-HVDC.
出处
《合肥工业大学学报（自然科学版）》
CAS
北大核心
2017年第1期47-52,共6页
Journal of Hefei University of Technology：Natural Science
基金
国家自然科学基金资助项目(51277049)
关键词
柔性直流输电(VSC-HVDC)
暂态频率
解析算法
潮流
一次调频
voltage source converter based high-voltage direct-current（VSC-HVI3C）
transient frequency
an- alytical model
power flow
primary frequency regulation
