Modernization of the automatic water level in boiler drums No. 1-4 regulation and control system

Equipment used, specifics of works provided

1. Our company was the first in Ukraine to use Schneider Electric’s flagship Modicon M580 controllers with hot redundancy.
2. Installation of the LDM feed water control valve DN 225 RV701, with the medium parameters: T=230⁰ C, P=230 kgf/cm² on welded joints with a wall thickness of 24 mm; installation of a feedwater and superheated steam flow sensor; the layout and assembly of the control cabinet was carried out by the company’s specialists using Schneider Electric equipment; installation of an HMI and a manual control unit.
3. An adaptive PID control algorithm with self-tuning coefficients was implemented.
4. Automatic control in the static mode is carried out with a deviation of the water level in the boiler drum of no more than ±5 mm, control in the dynamic mode is up to ±30 mm of the water level in the boiler drum.
5. A semi-automatic mode of switching from thread A to thread B and vice versa has been implemented.
6. A detailed analysis of the operation of the water level control system in the boiler drum was carried out using the obtained trends of the main system parameters.