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随着大系统的互联,出现了区域间振荡现象.为抑制这种振荡,本文提出了一种新的FACTS装置,并根据输电线模型和纵向机电模型的相似性,推导了该FACTS装置的最佳参数和最佳安装位置的确定方法.用一420kV 纵向系统和一个复杂电力系统为例进行了仿真计算.结果显示该装置可有效地抑制区域间振荡. 相似文献
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传统的机电暂态仿真对电力电子装置例如HVDC和FACTS采用准稳态模型,因而不能仿真动态过程中电压、电流的变化.而电磁暂态仿真程序(例如EMTP,EMTDC)受计算规模的限制,一般要对研究对象的外部电力系统进行等值化简,因此,不能反映系统机电暂态过程对电磁暂态过程的影响.该文中的混合仿真算法为弥补上述两种方法的不足,对电力网络采用准稳态模型,而对待研究的电力电子装置使用电磁暂态模型,EMTP仿真中考虑了频率偏移对电磁暂态仿真的影响.混合仿真算法为研究各种FACTS电力电子装置及其控制系统的动态性能提供了一种实用的工具. 相似文献
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为了满足工程上广泛应用的PI控制器的性能要求,又能克服一般PI控制器参数整定和调整的困难,基于dqo同步旋转坐标系下的UPFC串联侧的数学模型。采用BP神经网络PI控制器分别对有功和无功进行控制,使PI控制器的参数可以自动整定,省去了繁琐的人工整定过程,并能随系统的变化在线调节,使有功和无功达到较好的控制性能。 相似文献
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This paper presents a novel approach to find optimum locations and capacity of flexible alternating current transmission system (FACTS) devices in a power system using a multi-objective optimization function. Thyristor controlled series compensators (TCSCs) and static var compensators (SVCs) are the utilized FACTS devices. Our objectives are active power loss reduction, newly introduced FACTS devices cost reduction, voltage deviation reduction, and increase on the robustness of the security margin against voltage collapse. The operational and controlling constraints, as well as load constraints, were considered in the optimum allocation. A goal attainment method based on the genetic algorithm (GA) was used to approach the global optimum. The estimated annual load profile was utilized in a sequential quadratic programming (SQP) optimization sub-problem to the optimum siting and sizing of FACTS devices. Fars Regional Electric Network was selected as a practical system to validate the performance and effectiveness of the proposed method. The entire investment of the FACTS devices was paid offand an additional 2.4% savings was made. The cost reduction of peak point power generation implies that power plant expansion can be postponed. 相似文献
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根据统一潮流控制器(UPFC)基本原理和运行状态的分析提出了含有统一潮流控制器的柔性交流输电系统(FACTS)潮流计算的综合数学模型.此模型可以采用快速P-Q分解法求解.算例系统计算结果表明该模型和算法有很好的收敛性.该潮流计算程序为柔性交流输电系统的潮流分析和动态过程的初值计算提供一种有效的手段. 相似文献
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晶闸管控制移相器 (TCPS)是电力网络中的新设备之一 ,藉以改善电力系统运行的经济性和可靠性 .本文介绍TCPS的工作原理、结构和功用 ,并提出若干不同类型的TCPS ,简单比较了它们的应用 相似文献
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This paper deals with the simultaneous coordinated design of power system stabilizer (PSS) and the flexible ac transmission systems (FACTS) controller. The problem of guaranteed cost reliable control with regional pole constraint against actuator failures is investigated. The state feedback controllers are designed to guarantee the closed loop system satisfying the desired pole region, thus achieving satisfactory oscillation damping and settling time, and having the guaranteed cost performance simultaneously. The proposed controllers satisfy desired dynamic characteristics even in faults cases. The controller's parameters are obtained using the linear matrix inequalities (LMI) optimization. Simulation results validate the effectiveness of this approach. 相似文献
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基于IGBT的新型静止无功发生装置 总被引:1,自引:0,他引:1
无功功率是电力系统的重要参数,研制出快速、灵活,能在正负两个方向调节无功的装置,对保证供电质量有很大意义。新型静止无功发生装置(ASVG)是柔性交流输电技术(FACTS)的核心装置,可有效防止大型电网在无功不足状态下,因电压不稳造成的电网崩溃;分析了ASVG的结构及其原理并进行了仿真。 相似文献
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