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This essay presents an efficient intelligent over-voltage hierarchical recognition system for 110kV substation based on LSSVM optimized by gridding optimal algorithm. It is very indispensable to analyze and find the causes of over-voltage for ameliorating insulation coordination in power system. According to analyzing field over-voltage data from over-voltage on-line monitoring devices installed in...
The paper puts forward a novel coal mine management system to solve the real-time monitoring and highly efficient rescue problems of underground work platforms. The scheme of ZigBee wireless sensor network combined with Controller Area Network (CAN) bus is adopted in this system. ZigBee substation is set at proper intervals in mine laneways to acquire Radio Frequency Identification (RFID) position...
A combined substation monitoring system based on ATT7022B and RS-485 was designed in this article. The monitor terminal communicates with each other in a cascading fashion through RS-485 bus. The data about electrical parameters and switching value were collected to send to the monitoring center in order to realize the function of remote control and collect meter reading. Also, the article shows the...
In this paper, a new Distribution Management System (DMS) based on security region is proposed. First, the model and topological characteristics of Distribution System Security Region (DSSR) are both introduced. This new theoretic tool provides a chance to implement real-time security analysis and control for distribution systems. Second, this paper proposes and describes five security states for...
With the deepening of wireless sensor network (WSN) applied in various services in smart substation, high data rate and quality of service has become the new research focus. For smart substation equipment condition monitoring, the paper designs clustered smart substation equipment monitoring network based on wireless sensor network. Reference to Zigbee protocol and IEC 61850 relevant regulations,...
Smart grid is a very important concept that optimizes and improves the reliability of power transmission systems. The smart grid is required to be more aware of its operative conditions and should have at least some degree of self healing capability. This paper discusses the condition monitoring technologies of HV equipment in smart grid. The development status of condition monitoring technologies...
This paper presents a new method which is based on the double-terminal travelling wave and the topological structure of power grid for locating short-circuit fault in electric power system. The method doesn't depend on status information of the circuit breaker. Only some substations are necessarily being selected as monitors. When a fault occurs on one line, the monitor substation records the arrival...
With the unceasingly development of the power system, the proportion of nonlinear loads is quickly increasing and harmonic sources become more and more. It has serious influence on the power quality. In order to protect the safe operation of power grids and safe use of electricity, various level power quality networks are gradually formed, which provides a sound basis for the analysis and application...
Contamination flashover directly affect the safety of coal production, by analyzing the pollution flashover mechanism is Characterization Equipment Leakage current drawn outer surface of insulation for insulation levels of representative physical quantities, the alarm value determined for the online monitoring system provides basis. External insulation design of substations and can find the online...
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