A monitoring system of leading phase operation of generator based on virtual instrument is presented in this paper. The system is composed of signal acquisition module, signal interface conversion module, data processing module, output control module, data display module and communication module. The signal of leading phase operation of generator is collected firstly. After the signal acquisition, conversion and processing, the related processing and analysis by virtual instrument software module in the computer is carried out. Then the display and control signal is outputted. The real-time monitoring of generator leading phase operation state is realized by the system. The system can realize the real-time and comprehensive monitoring of leading phase operation of generator. The system also can achieve the collection, analysis, processing of data of leading phase operation, and the control, communication and display of output signal. Compared to traditional monitoring system, this system has the advantage of simple, powerful, real-time and high accuracy, and can be carried out through the network of online monitoring and remote monitoring. The monitoring system has greatly reduced the overall cost. The development cycle of the system is also short.

No abstract

The distributed generation(DG) location, capacity and its influence to distribution network is an important research subject of smart grid. According to the typical daily load curve change rule in distribution network, selecting two operation modes of weighted largest load and weighted least load, taking the minimum of reverse flow times and network loss for the target, combined with the type of DG and operation characteristics , confirming optimal accessing points and optimal capacity of DG. Through the comparative study, the rational introduction of DG improves the voltage level of distribution network and reduces the network loss.