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首页> 外文会议>International Conference on Control, Instrumentation, Energy Communication >Transient analysis of mechanically switched capacitors with and without damping network connected to A.C grid
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Transient analysis of mechanically switched capacitors with and without damping network connected to A.C grid

机译：机械开关电容器的瞬态分析，有无阻尼网络连接到交流电网

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摘要

Mechanically switched capacitors (MSC) are very well known reactive power compensation devices which are extensively in use in power transmission systems. However, during switching of MSC in a high voltage grid, significant transients are found to appear across the capacitor bank bus as well as different elements of MSC which may lead to insulation degradation affecting the long term performance of the capacitor banks. An improved version of the MSC is MSCDN where a damping network is employed with the capacitor banks to damp out the transient oscillations. However, during switching of a MSCDN plant significant transients are observed across its different elements. Considering the afore-said fact, in this contribution, a comparative study of transient behavior of mechanically switched capacitors with and without damping network is presented during switching in a 400 kV A.C grid. Transient simulations are performed on an exemplary MSC and MSCDN model using PSCAD/EMTDC software. It has been observed that there is a significant reduction in transient overvoltage and inrush current in switching a MSCDN plant when compared to a mere MSC switching. Moreover, the percentage reduction in transient overvoltage and inrush current during switching a MSCDN plant is found to depend on the design of damping network which may be important to analyze the transient behavior during switching in a high voltage A.C grid.
机译：机械开关电容器（MSC）是众所周知的无功功率补偿设备，已广泛用于输电系统中。但是，在高压电网中切换MSC期间，发现电容器组总线以及MSC的不同元件之间会出现明显的瞬变，这可能会导致绝缘性能下降，从而影响电容器组的长期性能。 MSC的改进版本是MSCDN，在该电容器中，阻尼网络与电容器组一起使用以衰减瞬态振荡。但是，在切换MSCDN设备期间，会在其不同元素上观察到明显的瞬变。考虑到上述事实，在此贡献中，提出了在400 kV交流电网中进行开关期间具有和不具有阻尼网络的机械开关电容器的瞬态行为的比较研究。使用PSCAD / EMTDC软件在示例MSC和MSCDN模型上执行瞬态仿真。已经观察到，与单纯的MSC切换相比，切换MSCDN设备时瞬态过电压和浪涌电流显着降低。而且，发现在切换MSCDN装置期间瞬态过电压和浪涌电流的减少百分比取决于阻尼网络的设计，这对于分析高压交流电网中的瞬态行为可能是重要的。

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