With Substation Safety Monitoring System Development And Research

The electric power safety monitoring and control is a significant link to ensure the electric power system run safely and stably. The dissertation is completed based on the Guang Xi province's project "Auto Low Voltage Grid Reactive-load Compensation Equipment". A electric power safety monitoring and control system is developed based on the potential safetyincident. The main tasks of the dissertation are as follows:(1)The system is developed on the basis of the advanced 32bit ARM processor-LPC2214 and high accuracy 3-phase electrical energy measurement IC-ADE7758. The system has faster work frequency and powerful ability of digital processing, and the alternating current sampling circuit and signal processing circuit improve the conventional method.(2) On the basis of Fast Fourier Transform (FFT), some algorithms, such as estimation methods for the parameters of sinusoidal signals and non-sinusoidal signals under normal conditions and other non-normal conditions, are presented to meet with the mesasurement of the system.(3) The system adopts advanced communications technique to build the communication net about the safety monitoring and control of distribution system. It not only transmist the real-time data reliably, but also it reduce the expenditure of the system communications net. If the accidents have happened, the system transmits some especial frames, as by GPRS. So employees of POWER GRID CORP. read the information and take surest way to prevent potential accident of electric system from happening. If the signal is weak, meter reading, upgrade the system software and setting the system parameter are bare implemented by means of USB.(4) Some software function in the system, such as checking the quality of electrical energy parameter, remote realtime automatic meter reading and automatic alarm, not only monitoring and control the power system, but also guarantee the electric power equipments running well.The system has high application value that it monitoring and control electrical distribution system and electric power equipments.