混合潮流控制器对电力系统性能的改善

Noel Richard Merritt, D. Chatterjee
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引用次数: 15

摘要

本文讨论了混合潮流控制器(HPFC)作为统一潮流控制器(UPFC)的替代方案在提高电力系统性能方面的适用性。UPFC是一种灵活的交流传输系统(FACTS)设备,包含两个开关转换器,一个串联,一个并联。为了配置HPFC,将UPFC的一个开关变换器替换为晶闸管控制的可变阻抗,从而降低了成本。本文采用并联补偿支路的多电平电压源变换器(VSC)和串联补偿支路的可控硅可变阻抗进行配置。结果表明,在适当的控制下,HPFC可以像UPFC一样,以任意角度与线路串联注入所需大小的电压。这有助于提供相当于UPFC的补偿,并提高电力系统的稳态稳定极限。
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Performance improvement of power systems using Hybrid Power Flow Controller
This paper discusses the applicability of Hybrid Power Flow Controller (HPFC) as an alternative to Unified Power Flow Controller (UPFC) for improvement of power system performance. UPFC is a flexible AC transmission system (FACTS) device containing two switching converters, one in series and one in shunt. To configure the HPFC, one of the switching converters of the UPFC is replaced by thyristor controlled variable impedances, thus reducing the cost. In this paper, the HPFC has been configured by multilevel Voltage Source Converter (VSC) used for the shunt compensation branches and a thyristor controlled variable impedance used for series compensation. It is shown that with suitable control the HPFC can inject a voltage of required magnitude in series with the line at any desired angle, just like UPFC. This helps in providing compensation equivalent to UPFC and improving the steady state stability limits of the power system.
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