Analysis of typical accidents for Ningbo power grid

GU Wei，REN Lei，LIU Gang，LI Feng-wei
（Ningbo Electric Power Supply Bureau，Ningbo 315010，China）

Abstract： The rapid extension of power grid technology requires fast and accurate processing of accident. In order to help the power dispatchers dealing with the incidents correctly and quickly，an analysis on the resolutions of the typical accidents of Ningbo power grid from transformer fault，bus fault and line fault was presented. The failure of the main transformer was divided into two main transformer operation and three main transformer. Bus fault was divided into four cases of the 220 kV substation of 220 kV double bus，double bus 110 kV，the 35 kV segmentation bus and 110 kV substation 110 kV bus fault. Line fault was divided into two cases of causing loss of power and do not causing loss of power. The results indicate that a method is described to solve the incidents from different operation modes of the substations and phenomenon after the accidents. It also provides a reference to the dispatching work of power grid.
Key words： typical accident； Ningbo power grid； resolution and analysis