low voltage ride through solution
auxiliary machines such as coal feeding and powder feeding for coal-fired boilers in thermal power plants have become the weakest link in automation, especially the low-voltage protection tripping of inverters that control the coal feeders in power plants, which is particularly serious for power plants. in the actual use process, when the grid voltage is low voltage crossing or standby switching, when the factory voltage is instantaneously or shortly lower than the inverter low voltage protection setting value, the coal feeder powder machine inverter low voltage protection action, at the same time fsss (boiler safety monitoring system) sends a stop signal, causing mft action, which brings great economic losses to the power plant. it has also become a high-risk area for power plant safety accidents. it is also a relatively large problem faced by power plants at present. to solve this problem, we can ensure the safe, reliable and efficient normal operation of the power plant and avoid the occurrence of shutdown accidents.
the low voltage ride-through solution solves the problem of low-voltage traversal of a class of auxiliary machines. one type of auxiliary machine greatly reduces the risk of auxiliary machine smashing by increasing the low-voltage traversing device, ensuring the safe and continuous operation of a class of auxiliary machine systems, and improving a class of auxiliary machine operating efficiency reduces the unplanned parking rate of the furnace and the economic loss of unplanned shutdowns.
typical case
chongqing wanzhou power plant
unit capacity: 1000mw*1
installation location: coal feeder
liaoning qinghe power generation co., ltd.
unit capacity: 600mw*2
installation location: coal feeder
sinopec yangzi petrochemical co., ltd. thermal power plant
unit capacity: 50mw*1
installation location: powder machine
pakistan kassim port coal-fired power station
unit capacity: 2*660mw
installation location: coal feeder, air preheater
