Analysis of Transient Interactions between a PWR Nuclear Power Plant and a Faulted Electricity Grid

Abstract

This paper presents the transient stability analysis of a pressurised water-type nuclear power plant following faults and disturbances affecting the electricity grid to which it is connected. The modelled nuclear plant consists of various integrated subsystems, such as core neutronics and thermal-hydraulics, piping and plenum, pressuriser, steam generator, turbine, governor, and dynamics shaft, in addition to the turbine-speed controller. The nonlinear nuclear power plant model is linearised at the operating point to acquire a linear model for controller design. The turbine-speed control loop effectively enacts a closed-loop implementation of the nuclear power plant connected to the electric grid. The various transient stability enhancement components such as the power system stabiliser, static var compensator, and static synchronous compensator are employed to test performance during severe contingencies. The interaction between the nuclear power plant, electric grid, and protection system is studied under various scenarios such as single-phase fault, three-phase fault, and permanent load loss. The performance of the nonlinear plant is further observed during load-following operation. The dynamic behaviour of the overall system is analysed using simulations in the MATLAB/Simulink/Simscape environment.

Verification of the WWER-1200 reactor dynamic model consisting of one-fuel unit adjacent to two coolant units

“…Исходя из перечисленных выше допущений, модифицированная система уравнений точечной динамики реактора ВВЭР и PWR [11,12], может быть записана в виде системы уравнений (4):…”

An arbitrary-order continuous sliding mode control technique for nonlinear PWR-type nuclear power plants

“…In this work, the nonlinear dynamic model of PWR type nuclear reactor and its associated subsystems given in Ref. [24,25] is adopted for the study. The model considers the dynamics of the reactor core, thermal hydraulics, piping and plenum, pressurizer, steam generator, condenser, and turbine-governor system, in addition to various actuators and sensors.…”

“…2. A detailed description of derivation of model equations of different systems, definitions of variables and values of parameters used in this work can be found in [24,25]. However, for brevity the dynamic equations of different systems are given below:…”

Nonlinear Model Predictive Control Using Feedback Linearization for a Pressurized Water Nuclear Power Plant

“…A realistic study should incorporate control schemes for the entire NPP process. However, only a few papers have discussed the control design for whole NPP system [1], [2], [40], [41]. In this respect, the proposed FBL-based MPC control strategy is applied to the different subsystems of the integrated NPP model.…”