GE IS200TRPAH2AHE ASM Circuit Board MARK VI General Electric
Brand ABB color Standard Application Industrial height 330mm rated current 521mA
Protection Level IP45 Suitable for motor power 119KW Applicable Site Power Industry BOM Number GJR2391500R1220 Power industry HIEE401782R0001 Part number IS200TRPAH2AHE
Applicable pipe 2 Whether imported is weighing 3.15 kg can be sold nationwide
GE IS200TRPAH2AHE ASM Circuit Board MARK VI General Electric
The control task of drum water level is to make the feed water flow adapt to the evaporation capacity of the boiler, so as to maintain the water supply stability within the allowable range of drum water level; The other is the false water level which is resistant to disturbance and load change.
The control scheme of drum water level is a combination of three-impulse feed water cascade control system and water level single impulse. The three-impulse boiler drum feed water automatic control system is composed of drum water level H as the main control signal, steam flow D as the feedforward control signal, and feed water flow W as the feedback control signal. It uses steam flow signal to feed water flow forward control, when the steam load suddenly changes, IS200TRPAH2AHE steam flow signal makes the feed water regulator move in the right direction at the beginning, that is, the steam flow increases, the feed water regulator opens larger, cancelling the reverse action caused by “false water level”. Therefore, the fluctuation amplitude of water level and feed water flow is reduced. When the signal that the feed water flow is reduced due to water pressure interference, open the feed water valve to keep the water supply constant. In addition, the feed water flow signal is also the feedback signal after the regulator action, which can make the regulator know the control effect early, so the three-impulse feed water control system, IS200TRPAH2AHE regulator works fast, can also avoid overregulation, reduce fluctuation and loss of control. In this way, the drum water level is rarely affected.
In addition, when the boiler is operating at low load, the water level control system can automatically switch to single impulse regulation. When the load suddenly increases and drops, it often causes high water level fluctuations. At this time, it is difficult to overcome the large disturbance of the water level by using the classical three-impulse control alone. At this time, IS200TRPAH2AHE can force up or down the position of the water supply valve through the objective information input of the program integrated instrument to prevent the water level from falling or rising too fast.
Single-impulse drum water level control is mainly used for water supply flow, main steam flow and other instruments damage, maintenance or start-stop control.
GE IS200TRPAH2AHE ASM Circuit Board MARK VI General Electric
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