%0 Journal Article
%T 基于Simplex算法的高压直流输电分段变速率VDCOL研究
%A 冯明
%A 李兴源
%A 李妮
%A 王超
%A 洪潮
%J 工程科学与技术
%D 2015
%R 10.15961/j.jsuese.2015.04.024
%X 中文摘要: 为了改善高压直流系统的故障后的恢复性能，在研究低压限流单元（voltagedependentcurrentorderlimiter，VDCOL）对直流系统功功率消耗和电压稳定性影响的基础上，提出了一种分段变速率低压限流单元（piecewise-variable-rateVDCOL，PVR-VDCOL）的控制方法，该方法通过将电压下降或恢复过程划分为几个不同的阶段，并在每个阶段根据电压水平的不同而设置不同的功率恢复速率。推导了控制器初值的计算公式，制定了利用Simplex算法优化控制器参数的流程，并重点分析了分段数目对控制器性能的影响及其确定方法。在PSCAD/EMTDC中对提出的PVR-VDCOL和传统线性VDCOL的控制效果进行了对比仿真，并对不同分段数目下的仿真结果进行了对比分析，仿真结果表明提出的PVR-VDCOL能够有效改善直流系统的恢复性能。</br>Abstract:In order to improve the performance of failure recovery characteristic of the HVDC,a novel VDCOL control method named piecewise-variable-rate VDCOL is proposed based on the study of VDCOL’s influence on the HVDC system’s reactive power consumption and voltage stability,which divides the voltage drop or recovery process into several different stages which have different power recovery rate according to the voltage recovery level.The formula for calculating the initial value of the controller is derived；the strategy using Simplex algorithm to optimize the controller parameters is designed, and analyzed on the number of segments effect on performance and methods to determine it. The control effect is compared between the PVR-VDCOL and the linear VDCOL, and the control effect under different number of segments was compared. The simulation results in PSCAD/EMTDC showed that the proposed PVR-VDCOL control method can effectively improve the failure recovery performance of the HVDC system.
%K 高压直流输电 低压限流单元 电压稳定 Simplex算法&lt
%K /br&gt
%K HVDC VDCOL voltagestability Simplexalgorithm
%U http://jsuese.ijournals.cn/jsuese_cn/ch/reader/view_abstract.aspx?file_no=201401290&flag=1