engleski

Implementation of software application for lightning strikes locating within analysis of power transmission network elements fault emergence

Next to “National Control Center” in Zagreb, the transmission grid of each transmission area (Osijek, Rijeka, Split and Zagreb) is managed remotely from “Regional Control Centers” of “Croatian transmission system operator” (HOPS). Remote control system consists of SCADA system and series of additional software applications, which assists operative personnel in their analysis of transmission grid conditions and decision making, which are significant for quality of transmission grid operating. One of additional software application is „Lightning strikes locating system” (SLM), who assists for lightning strikes location determination in real time. Due to lightning strikes, transmission grid elements could be rarely exposed to very complicated faults which are not easily noticed, but could cause very dangerous grid operation conditions. To undertake necessary measures, it is important to locate in time initial faults causes resulting of lightning strike. This paper will analyze a few practical examples and demonstrate contribution of software application SLM, together with SCADA system, to operative personnel in Grid centers, for determination of fault causes in transmission grid, initiated with lightning strikes, in order to prevent possible more complex failures, as well as dangerous transmission grid operation conditions. For this analysis, data from SLM software application are used like inputs, to be specific, data about locations of lightning strikes into transmission lines or power plants, and electricity current values of lightning strikes between clouds and ground. Data about electricity current values before and after fault, impulses or functioning of protection devices, as well as circuit breakers status for certain transmission grid elements, all that are used from SCADA system. On that data base, cause and consequent relation between transmission grid fault location and lightning strikes location could be obtained, to find correlation of fault existence with lightning strike. In conclusion, contribution of SLM software application will be explicated for fault analyses in real time, as contribution to Grid centers personnel for faster decision making, respectively contribution to better transmission grid operational management and more secure power system overall.

lightning location system, transmission network faults analysis, real time operation analyses

nije evidentirano