Abstract：With the development of economy in China, the demand for power quality of grid is getting higher. It is very important to correctly monitor the power quality data. Based on IEC 61000-4-30 standard, this paper proposes a scheme of PQDIF. The scheme takes the 10 cycle data as the statistical basis, strictly comply with the IEC 61000-4-30 A-level standard, and realizes the file format of PQDIF correctly and completely. On the basis of this scheme, a power quality monitoring terminal is developed in accordance with the standard system. HTM bus as the transmission channel between CPU and DSP is used and statistical data to the operating system is transmitted. The operating system uses MySQL database as storage engine, and provides service interfaces for applications such as IEC 61850, LCD and so on. It realizes the storage, query and deletion of PQDIF.The test platform is built, and the test results show that the scheme meets the requirements of IEC 61000-4-30 standard. Research and development of power quality monitoring terminal has been successfully applied in Anhui, Sichuan and Chongqing and other places, the operation is stable and reliable, and provides a solid data base for the power quality control of users.
2018, Vol. 19 
