Power Quality Monitoring And Management System

With the rapid development of science and technology and the national economy, the demand for high-quality electric power in industrial production is growing. However, the use of modern electronic equipment and nonlinear load made the power increasingly serious polluted, power quality has been more and more concerned to the electricity sectors and its customers. At present the domestic and foreign power quality monitoring instruments have some disadvantages. Combined with the latest technology, we have designed and developed the software of comprehensive power quality monitoring and management. Its design bases on the relevant domestic and international standards and uses an object-oriented distributed systems theory and advanced technology to ensure the realization of intelligent monitoring devices' "plug-and-play" and the interoperability between the main station systems. The information resources is shared in the entire network, which could avoid information isolation and plots investment.Firstly, from the development process of power quality research, to the reason of paying attention to power quality and then to the standardization of the definition, classification, range and term for power quality. There are five prime indexes of power quality: voltage deviation, frequency deviation, harmonic content, voltage fluctuation and flicker, unbalanced three-phase voltage and current. This paper present the concept of these five indexes and the criterion made by our country. Then, the paper proposed the thought and the overall scheme which develop one kind of advanced comprehensive power quality monitoring and management system, and this system uses the object-oriented theory to establish a distributional power quality online monitoring network. The...