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With the continuous development of society and the improvement of people's life, people are increasingly concerning about the safe operation of the power grid, and single phase to ground fault of distribution networks is one of the problems. Because more branch of distribution networks and complex structure, the traditional methods can't achieve satisfactory results. An on-line fault location method...
This paper describes the development status of electric power communication network and Electric Power Communication System Network. According to the features and networking mode, the paper analysis and establish electric power communication network based on soft swhitch feasibility research, combined with the features of electric power communication network.
Based on the theory of the zero-sequence current phase's fault location method, this article proposes a location algorithm by comparing the relationship between the time and phase radian. The implementation of this method is to use GPS(Global Positioning System) second pulse for synchronous sampling by extracting zero-sequence current, then transmit the collected phase information by the wireless...
The traditional method in single-phase earth fault is too complicated, massive manpower material and financial resources are wasted, the method which proposed in the article is based on Ad hoc. In distribution network, install wireless nodes across a distance, framework for wireless networks, real-time monitoring. And there is a broad application prospect of the phase location method which proposed...
This paper presents a multiport traveling wave fault location method which is based on PLC. In this method, we use the different time that traveling wave, which is generated at the moment when a fault arising in the medium voltage distribution lines, arrive at each transformer, then use the PL3105 chip sending the time signal to the central station, after the central station getting the time signal,...
A method of fault location based on pulse signal injection has been promoted in this paper, which is not only independent of the following factors, such as system operating mode, topology, neutral grounding and random fault, but also the site of signal injection, the width and period of pulse are flexible and adjustable. In this paper the design scheme of software and hardware for signal source is...
With the development of network and digitalization, the digital substation has become a hot research for people. This paper introduces the research and realization for acquisition the current signal in substation based on Rogowski coils, describes system composition and working principle, designs the hardware circuit of high voltage side, and specifies the selection of each device. The paper also...
In the distribution network fault location, because of the cement pole earth fault and the existence of the wire distribution capacitance makes the C type traveling wave method and the AC signal injection method can not work effectively. DC signal injection method solves the problem of the two methods' blind area. The advantage of it is free from to wire distributing capacitance influence, and the...
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