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Research and Realization of Fault Location in Distribution Network

Author: FengWeiJie
Tutor: LiaoZhiWei；ZhouLuoXing
School: South China University of Technology
Course: Electrical Engineering
Keywords: Distribution Automation Fault Location Matrix Algorithm Fault Indicator
CLC: TM732
Type: Master's thesis
Year: 2011
Downloads: 212
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Abstract

With the urban network and rural power grids and electricity markets further the continuous development of user power quality and supply reliability requirements are high, thus requiring the electricity sector to improve and enhance the level of distribution automation, in the event with network failure immediately fault location, isolation and restoration of power supply to reduce outage time. Research and intelligent distribution network fault fast positioning, for improving the reliability of the distribution network has an important significance.First, the paper analyzed the distribution network and the corresponding mathematical model of distribution network fault location and isolation of the principle of a detailed discussion and analysis of the distribution network for a variety of fault section to determine the location and isolation the general algorithm. On this basis, focusing on unified fabric based fault location algorithm for distribution network. The algorithm is simple to handle SCADA fault information, through the adjacent switch matrix, the matrix fault information and fault analysis to determine the matrix calculations quickly and accurately locate the fault zone and fault isolation, fault zone to ensure the transfer of non-supply.Secondly, the power distribution network for a wide range of features and more, if totally dependent on the switch, circuit breaker install automation equipment to achieve fault location, isolation, a huge investment, long construction period, and the fault location accuracy is not high. This paper presents the use of fault detection circuit and ground fault indicator of the program, to make full use of existing resources to provide much power distribution network reliability, to achieve fast fault location and isolation. And for ground fault zero-sequence current is difficult to detect the problem, the use of resistive load into the dynamic characteristics of a fault signal, with the fault indicator to determine the ground fault zone.Areas for the new session the status of the existing distribution network equipment, analysis of the characteristics of the traditional methods of fault location and weaknesses, and the next step in the construction of distribution automation fault location system function requested.In theory, based on this paper, Xinhui Power Supply Bureau distribution network, for example, with a network of intelligent positioning system failed rapid establishment of communications systems, hardware, software, etc. for detailed analysis. 华南理工大学硕士学位论文Finally, according to the actual operation, the program reached the fault location practicality and economy, as well as in the pilot phase of the problem to be solved.

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Power system scheduling, management, communication > The operation of the power system
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