| The territory of our country is vast, network lead to everywhere in all directions. If large faults would happened in electrical grid system, it would cause heavy power paralyzation and become electrical equipment scraps; And because power grid is restricted by environmental conditions and China’s complex and varied geography, it is difficult to deal with accurately and timely when it does not work. Then it will give the people and the country a serious economic loss. How can we find the problem fleetly and accurately before failure, and facilitate staff to the timely and effective troubleshooting, is become a big problem in today’s power system.The causes of failure were analyzed in the process of operation of the power system. The most prone to fault point location is determined and the highest temperature of security is setted. This paper designs a wireless intelligent thermometer and the corresponding monitoring interface system. Put forward a kind of scheme based on ZigBee remote distributed temperature detection; AT89S52single-chip microcomputer as the core controller of the system, through DS18B20sensors to collect temperature of each node in the power system. The value by AT89S52devices transmits to SZ05launchers and through the digital tube to display the node temperature value. Received the data by SZ05chip, and transmitted to PC through the RS232serial port line. Use solar panels to a discharge protection circuit of lithium batteries, to guarantee he normal work of the equipment around the clock. And through the Visual Basic program to write the whole detection system software interface in the computer. The software can preserve detects the emperature value of time and display the relationship graph of temperature against time in real time. When electric power network is failure, it can accurately judge the fault position and start an early warning. It is convenient to staff to maintenance the point of failure, and improve the safe operation of power systemIn this paper, design of wireless intelligent thermometer and test monitoring software have a safe and eliable operation on the simulation fault circuit experiment in electrical and electronic laboratory in July2012in Shanxi agricultural university. It can realize the safe operation of power system and have an early warning, then detected and automatically save the data, and effectively improve safe and reliable operation of the capability of the power grid. To compare the temperature value under normal conditions and failure conditions, this equipment can accurately judge the fault point. The early warning capability is strong and have a high test precision. It is stability to run, convenient to reading and have other advantages and so on. Believing that with the pace of the era of "smart grid", application of this equipment will have broad market prospects. |
