Comparison of state feedback and PID control of pressurizer water level in nuclear power plant

Abstract

Comparison of state feedback and PID control of pressurizer water level in nuclear power plant MARIUSZ CZAPLIŃSKI, PAWEŁ SOKÓLSKI, KAZIMIERZ DUZINKIEWICZ, ROBERT PIOTROWSKI and TOMASZ RUTKOWSKIThe pressurizer water level control system in nuclear power plant with pressurized water reactor (PWR) is responsible for coolant mass balance. The main control goal is to stabilize the water level at a reference value and to suppress the effect of time-varying disturbances (e.g. coolant leakage in primary circuit pipeline system). In the process of PWR power plant operation incorrect water level may disturb pressure control or may cause damage to electric heaters which could threaten plant security and stability. In modern reactors standard PID controllers are used to control water level in a pressurizer. This paper describes the performance of state feedback integral controller (SFIC) with reduced-order Luenberger state observer designed for water level control in a pressurizer and compares it to the standard PID controller. All steps from modeling of a pressurizer through control design to implementation and simulation testing in Matlab/Simulink environment are detailed in the paper.

Dynamic model of nuclear power plant steam turbine

“…Dead space output pressure is equal to the input pressure, because of assumption of no pressure drop in this area (2). For the temperature a proportion including nominal values of these variables for appropriate dead space was assumed (3). Model output results with: mass flow M DPout put , temperature T DPout put and pressure P DPout put .…”

“…Paper authors take part in a research team whose research focus on solving the problems related to modeling, diagnostic and control of NPP e.g. [3,12,15,16,17,20]. This paper presents a dynamic, multivariable, nonlinear model of NPP steam turbine based on the approach [18] and compares it with the modified static one presented in [12].…”