scholarly journals Experience of Implementation of Safety and Normal Operation Control Systems at NPP Units

2016 ◽  
pp. 65-70
Author(s):  
V. Yelisieiev ◽  
G. Pyvovarov ◽  
K. Herasymenko
Keyword(s):  
Control Systems ◽  
General Information ◽  
Normal Operation ◽  
Safety Control ◽  
Distinctive Features ◽  
Digital Devices ◽  
Channel Maintenance ◽  
Operation Control ◽  
Design Systems ◽  
And Control

The paper deals with instrumentation and control (I&C) of safety control systems (ESFAS) and normal operation control systems (NOCS) for NPP units. The research contains: general information on I&C of ESFAS and I&C of NOCS; description of design solutions for ESFAS, NOCS and principles of their implementation in I&C versions, description of basic components for design of I&C of ESFAS and I&C of NOCS. Distinctive features of ESFAS and NOCS I&Cs are the following: possibility to design systems with different number of channels in accordance with the design requirements; higher reliability due to redundant structures, including redundancy of analog-digital units and control drive units; minimization of cabling due to optical interface of data transmission using digital devices for remote control, indication and alarm in MCR (ECR); possibility of single redundant channel maintenance of I&Cs without losing operability; continuous monitoring of equipment of I&Cs, including diagnosing of input discrete signal channels and detection of hidden faults “on demand”.

scholarly journals Application of the FPGA Technology for the Development of Multi-Version Safety-Critical NPP Instrumentation and Control Systems

2020 ◽  
pp. 52-61
Author(s):  
A. Perepelitsyn ◽  
O. Illiashenko ◽  
V. Duzhyi ◽  
V. Kharchenko
Keyword(s):  
Control Systems ◽  
International Standards ◽  
Design Tools ◽  
Integrated Development ◽  
Safety Critical ◽  
Digital Devices ◽  
Diversity Assessment ◽  
Integrated Development Environments ◽  
And Control

The paper overviews the requirements of international standards on application of diversity in safety-critical NPP instrumentation and control (I&C) systems. The NUREG7007 classification of version redundancy and the method for diversity assessment are described. The paper presents results from the analysis of instruments and design tools for FPGA-based embedded digital devices from leading manufacturers of programmable logics using the Xilinx and Altera (Intel) chips, which are used in NPP I&C systems, as an example. The most effective integrated development environments are analyzed and the results of comparing the functions and capabilities of using the Xilinx and Altera (Intel) tools are described. The analysis of single failures and fault tolerance using diversity in chip designs based on the SRAM technology is presented. The results from assessment of diversity metrics for RadICS platform-based multi-version I&C systems are discussed.

Design of Digital Control Systems by Nonlinear Uncertain Objects

2021 ◽  
Vol 64 (3) ◽  
pp. 68-74
Author(s):  
Vladimir Elsukov ◽  
◽  
Anatoly Gaiduk ◽  
Vjacheslav Lachin ◽  
Alexandr Muzhenko ◽  
...  
Keyword(s):  
Control Systems ◽  
Digital Control ◽  
Design Method ◽  
State Variables ◽  
Automatic Control Systems ◽  
Digital Devices ◽  
Digital Control Systems ◽  
And Control ◽  
Controllability And Observability ◽  
Asymptotic Observers

Minimum-phase nonlinear objects in the conditions of incomplete information about state variables and nonlinearities of the objects are considered. The design method of the digital automatic control systems in the conditions of uncertainty is offered. The decision is received with application of the asymptotic observers and control on state and impact under conditions of full controllability and observability of the controlled objects. This control provides the necessary performance of the control systems. The digital devices algorithm of digital control system is received by sampling of the found control. The efficiency of the developed method is shown on the numerical example. The developed method can be applied to design of digital control systems of production and technological objects of various assignment.

Optimal Prediction for Braking Speed of Urban Rail Vehicle

2012 ◽  
Vol 253-255 ◽  
pp. 1324-1329
Author(s):  
Meng Nan Zhang ◽  
Hong Ze Xu
Keyword(s):  
Control Systems ◽  
Computer Control ◽  
Minimum Variance ◽  
Normal Operation ◽  
Rail Vehicle ◽  
Measuring Devices ◽  
Urban Rail ◽  
Measured Speed ◽  
And Control ◽  
Actual Computer

The accurate measurement of the speed of urban rail vehicle is the basis of normal operation of the train controlling. Since speed measuring devices of vehicle-borne is inevitably disturbed by the sensors or the external environment, the deviation between the measured speed and the actual value, which varies randomly, is impossible to eliminate. This paper utilizes the method of minimum variance prediction to predict the speed of the train. By this way, the variance of the deviation between the predicted value and the actual value of the speed can be minimized. The model of the speed of the train is also discretized, which overcomes the shortcomings that the transitional models and control theory are limited to theoretical analysis but cannot be used in the actual computer control systems. In the section of simulation, the article shows the actual simulation results, which prove that this method has strong practicability.

Integrated Modernization of Safety Control Systems and Normal Operation Systems of Unit 3 of Smolensk NPP

Atomic Energy ◽  
2021 ◽  
Author(s):  
N. A. Bugrii ◽  
P. N. Bykovskii ◽  
S. V. Vasil’ev ◽  
S. V. Epifanov ◽  
G. V. Kolibas ◽  
...  
Keyword(s):  
Control Systems ◽  
Normal Operation ◽  
Safety Control
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