Large Signal Stability Analysis at the Common Coupling Point of a DC Microgrid: A Grid Impedance Estimation Approach Based on a Recursive Method
作者:
Santiago Sanchez
所属专业方向:
电力电子，高压输电，实时仿真
摘要:
Abstract—The design of microgrids at the level of distribution systems requires a stable behavior for multiple operation states. The tools used to study the stability of such systems require the estimation of the grid impedance. By the use of the grid impedance estimation around an operation point, it is possible to define a space variable-parameter to obtain a qualitative or quantitative measure from the operation to the unstable boundary. This study presents a comparison of the Kalman filter and the recursive least squares method for the estimation of the grid impedance. The grid impedance is estimated by the technique based on two neighbor operation points. The results were validated by a hardware in the loop and an experimental setup. Finally, the estimated values of the grid impedance of a microgrid are used with a large signal stability study of a dc constant power load.
Large Signal Stability Analysis at the Common Coupling Point of a DCMicrogrid: A Grid Impedance Estimation Approach Based on a Recursive Method ( n: j, \4 g' L! Y4 D* W直流微电网中普通耦合点的大型信号稳定性分析：基于递归法的电网阻抗估测法 , e M0 U! { f5 i) ^! L( D 7 J# n# |. J( H v% {Author(s)( A# i/ I8 F) `5 v6 m" X' ~0 n
Santiago Sanchez, 1 W9 U# A. i% Y/ ^9 a+ X8 XAbstract % ]3 C# M) `3 J2 R5 jAbstract—The design of microgrids at the level of distribution systems requires a stable behavior for multiple operation states. The tools used to study the stability of such systems require the estimation of the grid impedance. By the use of the grid impedance estimation around an operation point, it is possible to define a space variable-parameter to obtain a qualitative or quantitative measure from the operation to the unstable boundary. This study presents a comparison of the Kalman filter and the recursive least squares method for the estimation of the grid impedance. The grid impedance is estimated by the technique based on two neighbor operation points. The results were validated by a hardware in the loop and an experimental setup. Finally, the estimated values of the grid impedance of a microgrid are used with a large signal stability study of a dc constant power load. 9 k! P5 v3 M/ Q, K6 Y/ \4 o. G% q
分布式系统级的微网设计要求多个操作状态的稳定性能。用于研究这种系统稳定性的工具需要进行电网阻抗估测。通过对某个工作点附近的电网阻抗进行估测，我们可以定义一个空间变量参数从而在非稳边界得到定性和定量测量。这项研究介绍了用卡尔曼滤波器和最小二乘递归法估测电网阻抗间的比较。电网阻抗通过基于两个相邻工作点的技术得到估测。通过硬件在环和实验性安装程序验证了结果。最后，微电网的电网阻抗估测值被用于直流恒功率负载的大信号稳定性研究。( s6 g ^9 P6 K8 D8 b
http://www.opal-rt.com/technical-document/large-signal-stability-analysis-common-coupling-point-dcmicrogrid-grid-impedance-9 ~# p$ e" |# h& { Large Signal Stability Analysis at the Common Coupling Point of a DCMicrogrid.rar(1.13 MB, 下载次数: 1)
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发表于 2014-11-11 10:41:51
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