Power-level regulation and simulation of nonlinear pressurized water reactor core with xenon oscillation using H-infinity loop shaping control

Gang Li,Bin Liang,Xiu Li,Xueqian Wang,Kang Wang,T Deaconescu,A Deaconescu

doi:10.1051/matecconf/20167008003

Abstract

This investigation is to solve the power-level control issue of a nonlinear pressurized water reactor core with xenon oscillations. A nonlinear pressurized water reactor core is modeled using the lumped parameter method, and a linear model of the core is then obtained through the small perturbation linearization way. The H∞loop shapingcontrolis utilized to design a robust controller of the linearized core model.The calculated H∞loop shaping controller is applied to the nonlinear core model. The nonlinear core model and the H∞ loop shaping controller build the nonlinear core power-level H∞loop shaping control system.Finally, the nonlinear core power-level H∞loop shaping control system is simulatedconsidering two typical load processes that are a step load maneuver and a ramp load maneuver, and simulation results show that the nonlinear control system is effective.

Highlights

Nuclear energy as a clean energy can be sustainable and renewable
Several researchers have made great efforts for the improvement of reactor core power control systems.The state-feedback basedcontrol with classical control part was proposed by Edwards et al [1,2] to devise power control systems of pressurized water reactor (PWR) cores
The linear quadratic Gaussian with loop transfer recovery (LQG/LTR) control wasadopted to contrivePWR core controllers for power regulations [3,4]

Summary

Introduction

Developing technologies of nuclear power plants (NPPs) for electricity generation is inevitable Of these technologies, it is necessary to investigate the power control technology of nonlinear nuclear reactor cores with xenon oscillations. The controllers in references [1,2,3,4] are designed based on a linear core model without xenon oscillations, and not always optimal or even ineffective for nonlinear cores. Based on this consideration, the H∞loop shaping control [5] with stronger robustness than that of the statefeedback or LQG/LTR control is adopted to design a nonlinear power control system ofa PWR core with xenon oscillations. The nonlinear PWR core power H∞loop shaping control system is simulated and conclusions are drawn

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Design of nonlinear PWR core power control system

Simulations

Findings

Conclusions