基于元件功率的区域电力系统薄弱环节辨识算法

An identification algorithm of the weak links for regional power system based on element power

在已构建的电力系统网络中总是存在着会造成大面积停电事故的网络节点,即薄弱环节,因此,对于庞大的电力系统网络来说,寻求网络中存在的薄弱环节具有着重要的意义。基于小世界网络模型对区域性电力系统进行网络建模,并以节点功率变化为基础,构建网络中某一发电节点的功率值变化或者从电网中解列后对网络系统中其他元件功率影响的一种新算法模型。并提出了功率变化度的概念,进而辨识电力系统中的薄弱环节,对电力系统的经济可靠建设提供理论支持。最后通过一个电力系统算例验证了该算法的有效性。

There are always network nodes that can cause widespread blackouts in the built power system network, which are called weak links. Thus seeking the weak links in the network has an important significance to a large power system network. The new algorithm model based on node power variation and the small-world network model for regional power system can estimate the effect on other elements power when the power of generation node changes or splits from the grid. Then through proposing the concept of the power change degree, the weak links in the power system could be identified and theoretical support for economic and reliable construction of the power system is provided. In the end, the validity of the new algorithm is verified through an example of the power system.