IS200TVIBH2BCC
IS200TVIBH2BCC
IS200TVIBH2BCC
is suggested to cancel the manual synchronous switch because the reliability of the automatic quasi-synchronous device is getting higher and higher. The reserved backup manual switch is: emergency trip button of generator and transformer group circuit breaker; Generator out magnetic switch trip button; Emergency button for diesel generator.
(3) The number of alarm light plate is kept about 20, which is combined with the thermal alarm, which not only reduces the type of equipment, but also facilitates the layout.
6 Common system control mode
For the 2 units of the public system, such as the utility and standby power system and thermal control system, DCS configuration can achieve the unit stop, another unit of the operation staff can monitor the public system, and requires the use of reliable measures to ensure the uniqueness of the control command, That is, only one set of DCS system is allowed to control the public equipment at the same time. Not because of the existence of the public system, and make 2 units of DCS coupled together.
In the practical application process of the project, according to the characteristics of DCS, two typical methods are adopted to realize the control of the public system. The DCS of Jiujiang Phase III is HIACS7000 system produced by HITACHI. In the configuration of DCS, we configure the same hardware and software in the two units and realize the conversion of operation rights by switching switches. Signals from external devices are fed into two DCS systems through redundant configuration (analog) or extended conversion (switch). At the same time to ensure that there is no misoperation accident, but also increased a considerable part of the criterion
conditions and I / 0 measuring points, the advantages of this way is when a unit outage or maintenance, can be more convenient to check the DCS, but also increased the reliability of the control, the disadvantage is to increase the number of external equipment, increase the cost. Adding a link also means increasing the possibility of failure. DCS of
