The Research And Design Of Power System For Insulator Contamination On-line Monitoring

In recent years, with the rapid development of photovoltaic industry, solar battery asthe energy source of switch power supply are widely used in electronic products field. Inthe present power system,the on-line monitoring equipment is one of the importantcomponents, it is related to the stability of power system power supply. The power supplyof the current on-line monitoring device is used for power supply of transformermonitoring equipment. At the time of power outage, monitoring equipment cannot worknormally, but solar energy is continuously, it greatly solved the problem that powermonitoring equipment can’t continue to work when power system blackout,which can helpthe operation of power system stablly and reliablly.In order to continue to maintain online monitoring equipment work of power systemin the night, in this paper, the storage capacitor charging technology of the electricprotection device energy were studied. This system charging for energy storage devicesthrough solar battery during the day, and then supply power for monitoring equipment inthe night, but it really is less on market,which satisfy the large volume capacitance ofintelligent charging standard charger, Some so-called smart charger use improved ways ofconstant current decline to make up for the inadequacy of the traditional constant currentand constant voltage charging ways, it cannot realize that charging voltage can accept thetracking technology of electric current curve for the battery. According to this phenomenon,we put forward a way that is based on the solar array maximum power point tracking(MPPT). By adding another auxiliary circuit in the solar cell output link, solar batteryworking at the maximum power point, this greatly improved the efficiency of solar energy.MPPT is to real-time sampling the output voltage and output current of the solar cell, bycalculating change in duty cycle of the converter to make load impedance of solar cells and the impedance matching, so that the solar cell output maximum power for energy storagedevices. I make the simulation experiment for simulation data and the simulationwaveform under the environment of Simulink.In order to solve the power supply problem of insulator contamination on-line monitoringdevice, I suggest a switch power of the solar cell can taking and super capacitor energystoraging, and put forward a kind of maximum power point tracking (MPPT) controlsystem based on ARM7-LPC2138, it is the combination of capacitor converter switch andBoost converter, super capacitor is charged in the most power; Discharging circuit is theBuck converter. Through the simulation analysis and example verification, this topologystructure effectively solves the deficiency of the Boost converter charging, to betterachieve the maximum power point tracking control (MPPT),and shorten the supercapacitor charging time. The theoretical analysis is correct, the performance of the systemreached the design target.