Various fault location methods for distribution network at home and abroad are summarized. According to the fault type,the location methods for short circuit fault and earthed fault are introduced. And the basic theor...
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Various fault location methods for distribution network at home and abroad are summarized. According to the fault type,the location methods for short circuit fault and earthed fault are introduced. And the basic theories, characteristics, improvement and applications of the representative methods are analyzed. The main problems in the applications of these methods are analyzed. In view of these questions, users' requirements and the development of distribution network, the improvement and research about fault location technical are proposed preliminarily.
In order to study on the problem of voltage stability of power system, this paper describes the static bifurcation analysis and the dynamic bifurcation analysis in voltage stabilization analysis of power system and it...
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In order to study on the problem of voltage stability of power system, this paper describes the static bifurcation analysis and the dynamic bifurcation analysis in voltage stabilization analysis of power system and its relationship with the voltage stability,discusses the voltage instability caused by two main bifurcation formal definition, the occurrence of the conditions and the calculation of the bifurcation point, and points out advantages and disadvantages of various algorithms. Finally the paper looks forward to further study of the bifurcation theory in terms of voltage stability.
With the development of modern technology, high quality power supply becomes more desirable in everyday life. Among problems related with the power quality, the most urgent is the voltage dip;with the application of p...
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With the development of modern technology, high quality power supply becomes more desirable in everyday life. Among problems related with the power quality, the most urgent is the voltage dip;with the application of power electronics devices, the power system is polluted by harmonics. SMES(Superconducting Magnet Energy Storage) system can not only compensate the voltage dip, but also provide a load- fluctuation compensation and active power filter. In the paper the main structure of SMES system is introduced;the necessity to use SMES are demonstrated by analyzing the problem of power quality. The analysis shows that SMES system is effective in improving the power quality.
After a distribution network failure occurs, how to correctly and quickly restore power supply to non- fault zone is of great significance to meet the user's power supply requirement and to improve power supply re...
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After a distribution network failure occurs, how to correctly and quickly restore power supply to non- fault zone is of great significance to meet the user's power supply requirement and to improve power supply reliability. At first, this paper introduces the research status of service restoration algorithm of distribution network, and then analyzes the advantages and disadvantages of various algorithms. At last, it expounds the problems existing in the current distribution network service restoration and makes prospect of research on the distribution network service restoration.
Traditional central power supply and distributed generation have the advantages and limitations themselves Micro grid technology can integrate the advantages of distributed generation and that makes for large scale ne...
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Traditional central power supply and distributed generation have the advantages and limitations themselves Micro grid technology can integrate the advantages of distributed generation and that makes for large scale new energy and renewable energy power generation system connected to the grid First, the micro grid research background and significance are introduced in detail, then the current research situations of micro-grid at home and abroad are represented, in the end, the key problems and development prospect of micro grid are discussed emphatically
At present years, the photovoltaic industry has a rapid development The research of related technologies also has made tremendous progress The photovoltaic power generation system includes the solar array, controller,...
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At present years, the photovoltaic industry has a rapid development The research of related technologies also has made tremendous progress The photovoltaic power generation system includes the solar array, controller, batteries, inverter, electricity load, etc In this paper, combining with domestic and foreign research status quo, respectively summarizes four aspects of photovoltaic system technology, the maximum power point tracking, DC converter, inverter and islanding detection
Over the past 10 years, nonlinear dynamics and chaotic theory attracted scholars and people got a deeper understanding of chaos. There are many methods for chaos research, and the method of using topological horseshoe...
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Over the past 10 years, nonlinear dynamics and chaotic theory attracted scholars and people got a deeper understanding of chaos. There are many methods for chaos research, and the method of using topological horseshoe is an important branch of those methods. So far, this is one of the core methods with mathematical rigor for chaos research. Based on simple thinking of geometric space, topological horseshoe build a bridge for numerical and theoretical studies of complex behavior of nonlinear systems so that people can carry out a series of studies for chaotic behavior. This paper introduces the basic content of topological horseshoe theory and the application to a simple power system.
In the situation that the traditional energy shortage and environmental pollution problems have become increasingly grim, the new energy research has been widespread concern at home and abroad. Represented by distribu...
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In the situation that the traditional energy shortage and environmental pollution problems have become increasingly grim, the new energy research has been widespread concern at home and abroad. Represented by distributed photovoltaic power is gradually from a stand alone system toward large-scale grid direction. However, the PV system chaotic phenomena threaten the stability of the system.
This paper proposes a general overview of distribution network automation technology. With the continuous development of society and economy, the distribution network automation has become the trend and developing dir...
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This paper proposes a general overview of distribution network automation technology. With the continuous development of society and economy, the distribution network automation has become the trend and developing direction of electric power system. As the end part of the electric power system, the distribution network is directly connected to the consumers and plays a vital role in improving the quality and reliability of power supply. In order to provide reference for improving the reliability of distribution network and to speed up the development of distribution network automation, this paper analyses the system structure, development status and trend of distribution network automation technology.
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