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A transient is defined as a process where a system transforms into an abnormal state from a normal state. In order to enhance safety and achieve greater economic benefits, it is very important to detect and identify transients in a timely manner during the operation of nuclear power plants. Thus, according to the ideas employed in image processing and photo retouching, we propose a novel method for...
Signal differentiation is widely used in system monitoring and control. The key problem in differentiator design is how to obtain a satisfactory tradeoff between differentiation exactness and robustness to uncertainties and noises. Based upon proposing a novel finite-time stabilizer for 2-order integrator chain, a new finite-time-convergent 2-order differentiator with bounded estimation error of both...
The application of digital instrumentation and control systems in Nuclear Power Plants (NPPs) provides a series of advantages, but it also raises challenges in the reliability analysis of safety-critical systems in the NPPs. Software testing is one of the most significant processes to assure software reliability, and the safety-critical systems of NPPs are sensitive to the severity of software faults,...
A high-temperature gas-cooled reactor-pebble bed module (HTR-PM), as a demonstration nuclear power plant (NPP), is now under construction in the Shandong province of China. The reactor protection system (RPS) in an HTR-PM is a safety-related system and is mainly in charge of monitoring safety-related parameters according to the reactor protection requirements. Thus, an RPS is very important to operations...
Reactivity is a key physical parameter that directly reflects the balance between neutron generation and consumption in every nuclear fission reactor. In this paper, by regarding the reactivity as an extended state-variable of point kinetics, a novel extended state-observer (ESO) is proposed. Theoretic analysis shows that this newly-built ESO provides globally asymptotically bounded estimation for...
An input and output ripple free Step-down converter is proposed in this paper. The two phase interleaved converter has only one inductor with four coupled windings, which decreases both the input and output ripple dramatically. Based on the analyses, the coupled inductor can also improve the transient response performance, and reduce the size and weight of the converter. Detailed analyses and simulations...
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