Study On Optimized Layout Of Current - Type Traveling Wave Device

Currently the majority of traveling wave fault location device installed in the substation that amplitude over the 220kV, and by requestion of the promotion of intelligent grid management, many of the same level of substation has been translated to the unattended system, under the considerations of the the economic factors and the observed characteristics of traveling wave installation, rational deployment of traveling wave distance measuring device in the grid, not only to facilitate the promotion of traveling wave fault ranging capabilities, but also make grid fault traveling wave measurement samples having for more resistance, in order to carry out further research and improvements to the measured data based on traveling wave analysis and locating algorithm can be promoted by it.Compared with a higher amplitude level during the transmission lines, the transmission lines with amplitude of 220kV have more sites miscellaneous topological relations, under the considerations of economy, efficiency, and reliability, traveling wave fault location device is not in the whole system globally installed.Meanwhile, the traveling wave fault location technology is only the recently of modern times is widely used in above the transmission lines.Because of the update frequency of the hardware and software is relatively high, and the device has installed irreversible nature, and the need for regular manual tuning operation, but with the more and more updated unmanned substation, so that the traveling wave fault location device in a network system where the problem with the arrangement optimal planning and installation conditions of the law was particularly important.Traveling wave distance measuring device optimal distribution in the grid, the system can be regarded as solved minimum dominating set (mathematics) calculation problems. Single-ended traveling wave is the basic form of the current traveling wave fault location work, and the reflected wave caused by the point of failure, the reflection、interference waves caused by the another head bus to end must be taken into account, the distribution process needs to be considered as one of the factors that affect the distribution and ultimately the objective function.For some different confidence area nodes, the corresponding installation weighting coefficients will be added, and also consider the request in the network system corresponding to the length of the historical fault line frequency, it will be a certain factor into the final calculation, and impact the final configuration.Phasor measurement unit distribution strategy will be referred,in the essence, the solution to their problems is the shortest path to solve the graph theory in the field and the minimum spanning tree in this article.On the comparetion of the same category with higher than 220kV in the grid, the current traveling wave positioning device have a more universal application.Current traveling wave fault location device is the main consideration object in this article.The core of this article includes:dominating set minimization calculation problem with the corresponding topology to a power system,in connection with the network system,establish some certain constraints.As well as for different line parameters,proportion of the weights for the factors involved in the calculation,the minimum dominating set solved by a system governed reference node by the GATS algorithm in order to obtain optimal placement problem, then (empirical mode method) judge the initial failure state,to determine whether the node follow the indirect measured conditions and it also can effectively determine the point of failure. Then weighted parameters will be added to calculate fault location to verify the validity of the method.