鉴于电力系统中日益出现的动态无功不足而导致的电压稳定性问题,基于潮流计算法,将可控串联补偿装置(thyristor controlled series compensator,TCSC)的稳态模型加入到潮流方程中,推导出带有TCSC的雅可比矩阵,并将其用于计算电压稳定性...鉴于电力系统中日益出现的动态无功不足而导致的电压稳定性问题,基于潮流计算法,将可控串联补偿装置(thyristor controlled series compensator,TCSC)的稳态模型加入到潮流方程中,推导出带有TCSC的雅可比矩阵,并将其用于计算电压稳定性灵敏度。在此基础上,用灵敏度指标对比计算和分析了TCSC安装前后整个系统和TCSC安装节点的电压稳定性,结果表明,安装TCSC后的电压稳定性灵敏度指标有较大改善。运用电力系统分析工具PSAT1.3.4对WSCC-3机9节点系统进行仿真,结果再次验证了文中方法的正确性、有效性和可行性。展开更多
This paper deals with power transfer capability enhancement using two common Flexible Alternating Current Transmission Systems （FACTS） devices, Thyristor Controlled Series Capacitor （TCSC） and Static Var Compensat...This paper deals with power transfer capability enhancement using two common Flexible Alternating Current Transmission Systems （FACTS） devices, Thyristor Controlled Series Capacitor （TCSC） and Static Var Compensator （SVC）. For this purpose, at first the optimal place of TCSC and SVC is investigated and the optimal size is determined. At the end, a comparison is made between the two FACTS devices. For calculating Available Transfer Capability （ATC）, Repeated Power-Flow （RPF） rule used, and the network limitations such as voltage, stability, thermal capacity, and power generation limits are taken into consideration. The proposed algorithm is run on a sample network. Results show effectiveness of TCSC in situations where the thermal limit is the dominant limitation of the network. In such situations, SVC is almost useless. It was also seen that under conditions of voltage limitations, both elements are helpful for the enhancement of ATC.展开更多
统一潮流控制器(unified power flow controller, UPFC)、静止同步串联补偿器(static synchronous series compensator, SSSC)、可控串联补偿装置(thyristor controlled series compensation, TCSC)和移相器(phase-shifting trans forme...统一潮流控制器(unified power flow controller, UPFC)、静止同步串联补偿器(static synchronous series compensator, SSSC)、可控串联补偿装置(thyristor controlled series compensation, TCSC)和移相器(phase-shifting trans former, PST)能够调节线路参数、灵活控制潮流变化,均已在国内外电网中实现工程应用,对均衡输电通道潮流、提升供电能力有重要作用。文中对UPFC、SSSC、TCSC和PST的理论研究和工程实践进行了综述。首先,分析了4种潮流控制装置的基本结构和控制原理,并介绍了国内外已投运工程的运行情况;其次,从结构、换流器技术、选址定容、控制策略、故障保护5个方面对潮流控制装置的关键技术研究现状进行概述;最后,展望了潮流控制装置在未来电网中的典型应用场景,并对潮流控制技术的研究方向进行了分析。展开更多
文摘鉴于电力系统中日益出现的动态无功不足而导致的电压稳定性问题,基于潮流计算法,将可控串联补偿装置(thyristor controlled series compensator,TCSC)的稳态模型加入到潮流方程中,推导出带有TCSC的雅可比矩阵,并将其用于计算电压稳定性灵敏度。在此基础上,用灵敏度指标对比计算和分析了TCSC安装前后整个系统和TCSC安装节点的电压稳定性,结果表明,安装TCSC后的电压稳定性灵敏度指标有较大改善。运用电力系统分析工具PSAT1.3.4对WSCC-3机9节点系统进行仿真,结果再次验证了文中方法的正确性、有效性和可行性。
文摘This paper deals with power transfer capability enhancement using two common Flexible Alternating Current Transmission Systems （FACTS） devices, Thyristor Controlled Series Capacitor （TCSC） and Static Var Compensator （SVC）. For this purpose, at first the optimal place of TCSC and SVC is investigated and the optimal size is determined. At the end, a comparison is made between the two FACTS devices. For calculating Available Transfer Capability （ATC）, Repeated Power-Flow （RPF） rule used, and the network limitations such as voltage, stability, thermal capacity, and power generation limits are taken into consideration. The proposed algorithm is run on a sample network. Results show effectiveness of TCSC in situations where the thermal limit is the dominant limitation of the network. In such situations, SVC is almost useless. It was also seen that under conditions of voltage limitations, both elements are helpful for the enhancement of ATC.
文摘统一潮流控制器(unified power flow controller, UPFC)、静止同步串联补偿器(static synchronous series compensator, SSSC)、可控串联补偿装置(thyristor controlled series compensation, TCSC)和移相器(phase-shifting trans former, PST)能够调节线路参数、灵活控制潮流变化,均已在国内外电网中实现工程应用,对均衡输电通道潮流、提升供电能力有重要作用。文中对UPFC、SSSC、TCSC和PST的理论研究和工程实践进行了综述。首先,分析了4种潮流控制装置的基本结构和控制原理,并介绍了国内外已投运工程的运行情况;其次,从结构、换流器技术、选址定容、控制策略、故障保护5个方面对潮流控制装置的关键技术研究现状进行概述;最后,展望了潮流控制装置在未来电网中的典型应用场景,并对潮流控制技术的研究方向进行了分析。
