Network security management tool for distribution systems

In this paper a network security management tool, which is integrated in a power system simulator, has been introduced. The network security management (NSM) is used by network operators to avoid insecure network states due to high penetration of DGs. Especially in situations of low load and strong wind the operation parameters e.g. current or voltage can exceed the allowable values. The NSM tool introduced in this paper is performing new NSM algorithms within the power flow calculations. On the one hand, it can be used as an online application to support the network operator in his decisions using measurements and short time forecasts. On the other hand, by using the tool for long time simulations it can be used to optimize the NSM algorithms, to optimally plan network reinforcement and to predict the intensity of the NSM system on the profitability of the DG operators.