高压直流(high voltage direct current,HVDC)换流器具有一定的动态无功调节能力,充分利用换流站的无功调节能力,可显著改善HVDC系统的稳定性能.文中研究了 HVDC系统稳态运行时的无功功率可调节能力,分析了有功功率和无功功率相互耦合的特性,以国际大电网(conference International des grands reseaux electriques,CIGRE)的HVDC标准测试模型和贵广Ⅱ直流输电工程模型为算例,对稳态工况的直流电流可运行范围进行了解析,进而求出整流、逆变两侧的无功功率可调节能力,并将其应用在无功控制中.研究发现,CIGRE的HVDC标准测试模型对于容性的无功功率和感性的无功功率调节能力相近,而贵广Ⅱ直流输电工程模型对感性无功的调节能力远大于对容性无功的调节能力.在电磁暂态仿真程序PSCAD/EMTDC中验证了无功功率可调节能力的正确性和应用价值.
Reactive power adjustable ability of HVDC under steady state condition
The high voltage direct current(HVDC)converter has a certain dynamic reactive power regulation ability.Making full use of the reactive power regulation ability of the converter station can significantly improve the stability of the HVDC.In this paper,the adjustable capability of reactive power of HVDC during steady-state operation is studied,and the coupling characteristics of active power and reactive power are analyzed.Taking conference International des grands reseaux electriques(CIGRE)HVDC standard test model and Guiguan Ⅱ direct current transmission engineering model as examples,the operating range of direct current under steady-state condition is analyzed,and then the adjustable capability of reactive power on both sides of rectifier and inverter is obtained and applied in reactive power control.It is found that CIGRE HVDC standard test model has similar regulating capacity of capacitive reactive power and inductive reactive power,while regulating capacity of inductive reactive power is higher than that of capacitive reactive power in Guiguang Ⅱ direct current transmission engineering model.The application value of reactive power adjustable capability is verified in electromagnetic transient simulation program PSCAD/EMTDC.
high voltage direct current(HVDC)steady state conditiondirect currentactive powerAC bus voltagereactive power
万方数据
维普
