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首页> 外文期刊>Umudike Journal of Engineering and Technology >DEVELOPMENT OF ADVANCED STATIC VAR COMPENSATOR (ASVC) USING FIVE-LEVEL DIODE CLAMPED VOLTAGE SOURCE INVERTER
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DEVELOPMENT OF ADVANCED STATIC VAR COMPENSATOR (ASVC) USING FIVE-LEVEL DIODE CLAMPED VOLTAGE SOURCE INVERTER

机译：用五电平钳位电压源逆变器开发高级静态无功补偿器（ASVC）

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Advanced Static Var Compensators (ASVCs) use combinations of variable inductive and capacitive elements with a switching converter to achieve faster response to changes in ac system conditions - they have long replaced traditional var compensators in mitigatingthe harmful effects of voltage magnitude variations and low power factor in transmission and distribution networks. In this paper an SVC configuration which has a 5-level voltage source inverter (VSI) and minimum energy storage elements is investigated. This SVC is usually referred to as advanced static var compensator (ASVC). 5-level inverter is employed because of its high-power, high-voltage feature, and low-harmonic content of the output voltage. The circuit model developed is used to investigate the operation of the ASVC using the inverter phase angle δ as control variable. The main aim of this work is to demonstrate the applicability of this ASVC in power factor correction and voltage regulation improvement, and hence improve the performance of transmission network. The equivalent circuit of the ASVC was developed and applied to a system operating at 0.7 power factor. Application of this ASVC achieved unity power factor in the system - resulting in optimum voltage regulation (magnitude of receiving-end voltage being very close to that of the sending-end voltage), decrease in power losses (transmission loss in MW was reduced by 46.7% because the line current was reduced from 3247A to 2370A) and costs. Consequently, the power transfer capability of the line was enhanced. The Small reactive elements (L=9.54mH and C=294 μF) were used to achieve these results. The simulations were done with Matlab software.
机译：先进的静态无功补偿器（ASVC）将可变电感和电容元件与开关转换器结合使用，以更快地响应交流系统条件的变化-他们长期以来一直替代传统的无功补偿器，以减轻电压幅值变化和低功率因数的有害影响。输配电网络。本文研究了具有5级电压源逆变器（VSI）和最小储能元件的SVC配置。此SVC通常称为高级静态无功补偿器（ASVC）。采用五电平逆变器是因为其具有高功率，高电压特性和低谐波含量的输出电压。所开发的电路模型用于以逆变器相角δ作为控制变量来研究ASVC的操作。这项工作的主要目的是证明该ASVC在功率因数校正和电压调节改进中的适用性，从而改善传输网络的性能。开发了ASVC的等效电路，并将其应用于以0.7功率因数运行的系统。该ASVC的应用在系统中实现了统一的功率因数-从而实现了最佳的电压调节（接收端电压的幅度与发送端电压的幅度非常接近），功率损耗的减少（MW的传输损耗降低了46.7） ％，因为线路电流从3247A降低到2370A）和成本。因此，提高了线路的电力传输能力。使用小电抗元件（L = 9.54mH和C = 294μF）可获得这些结果。仿真是使用Matlab软件完成的。

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