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Reactive power management of distribution networks with wind generation for improving voltage stability

机译：带有风力发电的配电网无功功率管理，可提高电压稳定性

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This paper proposes static and dynamic VAR planning based on the reactive power margin for enhancing dynamic voltage stability of distribution networks with distributed wind generation. Firstly, the impact of high wind penetration on the static voltage stability of the system is analysed and then the effect of composite loads on system dynamics is presented through an accurate time-domain analysis. A new index, reactive power loadability (Q-loadability), is used to measure the vulnerability of the network to voltage collapse. Compensating devices are located using Q-loadability to increase the system voltage stability limit. Finally, a cost-effective combination of shunt capacitor bank and distribution static compensator (D-STATCOM) is determined through static and dynamic analyses to ensure voltage stability of the system after a sudden disturbance for different wind penetration levels. This study takes into account the induction motor dynamic characteristics which influence the transient voltage recovery phenomenon. The results show that the proposed approach can reduce the required sizes of compensating devices which, in turn, reduces costs. It also reduces power losses and improves the voltage regulation of the system.
机译：本文提出了基于无功功率裕度的静态和动态VAR规划，以提高分布式风力发电配电网的动态电压稳定性。首先，分析了高风速对系统静态电压稳定性的影响，然后通过精确的时域分析，提出了复合载荷对系统动力学的影响。一种新的指标，无功功率负载能力（Q-loadability），用于衡量网络对电压崩溃的脆弱性。使用Q负载能力定位补偿设备，以增加系统电压稳定性极限。最后，通过静态和动态分析来确定并联电容器组和配电静态补偿器（D-STATCOM）的经济有效组合，以确保在针对不同的风速等级突然受到干扰后，系统的电压稳定性。本研究考虑了感应电动机的动态特性，这些特性会影响瞬态电压恢复现象。结果表明，所提出的方法可以减小补偿装置所需的尺寸，从而降低成本。它还减少了功率损耗并改善了系统的电压调节。

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