Sequential Control Of Generators And Network Distributed Control System (dcs)

It is a frequent performance of the synchronization of generators in power plants. Spare generators are required to be rapidly plunged into the system to meet the customer's increasing demands caused by electric load's rising as the system is in good order, and to stop system's breakup in result of power supply's losing when faults occur. In the two cases, the synchronizing course must be dependable, safe and rapid to ensure generators safe and system running reliably and economically. In power plants, quasi-synchronizing devices assume the. responsibility. These devices directly influence generators' safety and life expectancy. Apart from this, it is also not ignored to economize energy. At present, most power plants adapt microprocessor-based, automatic quasi-synchronizing devices whose performances greatly exceed handraulic and analogue devices.Network joining is one of the important manipulation procedures in power plants. Conventional net-joining was to undergo intricate manipulation steps, with easy occurrence of faults. By incorporating to DEC's function, the net-joining action can be automated with much labor saving. The sequential network joining procedure is here specifically described.At the same time the capability of the power system is incessantly increasing. The capability of the synchronous generator becomes more and more large. If large generators parallel irrelevantly which will induce very serious impact. The main content of this paper is put forward the project ideal of sequential control net join manipulation. The characteristics of this ideal as follows: (a). This project designs a lot of closedown element in order to guarantee system's security, (b). Use the...