The Underground Coal Mine Power Quality On-line Monitoring System Based On DSP

Output and efficiency in the work of coal mine is very important. As industrial automation services have been used in the mine operation. Compared with before, now in the acquisition work of coal, has been in electronic equipment. The modernization of services for the mining industry provides great convenience. With a large number of nonlinear load connected to the coal mine power grid, reduce the coal mine power grid power quality, and now mine to test the access of the nonlinear load will with extremely high standard to measure the power quality. So it is now for the coal mine electricity power quality put forward very high requirements.The emergence of new institutionalism to test the nonlinear charge system architecture based on digital signal processor and a complex programmable logic devices. This system is based on digital signal processor. This system not only can detect the nonlinear load can also be related to a variety of other electrical energy parameters for testing. Such as voltage, current and so on can make effective detection. The detection device also has a bonus to a lot of other functions, such as on a particular point in time into law effectiveness of the record. At the same time, it can also support SD card interface expansion, the system is helpful for data access. System of communication mode can be divided into RS485communication and local Ethernet remote communication. In these two kinds of communication mode, RS485can help users to digital management of statistical data, and network interface can be directly transmitted data.This paper mainly introduces the following parts:first of all, it introduced the power quality detection technology at home and abroad and the reality, and measuring method of power quality related parameter description. After the hardware design and software design of the system is to introduce the basic. Finally, based on system testing to prove effective. Thesis finally for the peformance test to do the research, and illustrates some device running mechanism.In the final test report can be concluded that the device detection of powerful, has high precision. And the device cost is not high, suitable for the market. And the device has a number of additional effect, can help users get a better experience. So this device has strong competitiveness in the market.