scholarly journals Synthesis of Boiler Controllers of the Automatic Power Control System of Power Units

2020 ◽  
Vol 63 (3) ◽  
pp. 223-235
Author(s):  
G. T. Kulakov ◽  
K. I. Artsiomenka
Keyword(s):  
Control System ◽  
Power Control ◽  
Automatic Control ◽  
Control Systems ◽  
Fuel Consumption ◽  
Power Unit ◽  
Power Controller ◽  
Automatic Control Systems ◽  
Automatic Power Control

The article concerns the problem of structure-and-parametric optimization of a cascade automatic control system (CACS) by an example of a boiler power controller and a fuel controller. This CACS, which is a part of automatic control systems for power units, consists of two loops, viz. of an inner loop (which purpose is stabilization of the system) and an outer loop (designed for the adjustment) and, also, of two controller, viz. an outer controller (which is a basic one) provided for stabilization of the output value of the object (in our case, of the actual power unit capacity) and of an inner controller (which is an auxiliary one) provided to regulate fuel consumption. The internal controller builds up the control action with the aid of the boiler load controller of the power unit. As compared to single-loop automatic control systems, the cascade  system provides better quality of transient control due to the higher performance of the internal loop of the system. This advantage is especially noticeable when compensating for disturbances that come through the channel of regulating impact. The article presents two methods of setting, viz. the fuel controller and the boiler power controller. The application of these methods can improve the quality of power control and reduce fuel consumption in transient modes in comparison with the setting of these controllers of a typical power unit automatic power control system. The results of computer simulation of transient processes in CACS for input step surge and internal perturbation confirm the advantages of the methods are presented in this article.

scholarly journals Features of Automatic Control of Technological Parameters of Water Level in the Drum Steam Boilers

2019 ◽  
Vol 54 (3) ◽  
Author(s):  
Isamiddin Siddikov ◽  
Dilnoza Umurzakova
Keyword(s):  
Control System ◽  
Power Control ◽  
Automatic Control ◽  
Water Level ◽  
Control Systems ◽  
Technological Parameters ◽  
Steam Boilers ◽  
Automatic Power Control ◽  
Boiler Drum

The three-pulse system of automatic control of the water level in the boiler drum received maximum distribution in the energy sector, as well as its modifications, which have the following disadvantages : the presence of static control errors at the end of the transition process in the development of internal disturbances and disturbances of superheated steam flow; large level deviations with sharp and significant changes in the load, which often leads to unloading or shutdown of the boiler or power unit. To eliminate these drawbacks, invariant systems for automatic regulation of the power supply of the drum boiler were previously developed. In work the system of automatic control of technological parameters of water level in a drum of steam boilers is considered. The description of control systems and a detailed description of the electrical power systems of the control system are given. Various methods of tuning the PI controller of a typical three-pulse automatic power control system are considered. The application of the method of structural-parametric optimization and the theory of invariance makes it possible by changing the structure of the system and optimizing the dynamic adjustment of the automatic power control system to significantly improve the quality of maintaining the water level in the boiler drum. Invariant automatic control systems eliminate static control errors under all influences and can significantly improve the quality of maintaining the level under variable conditions. The methods are proposed to significantly improve the quality of water level control in the boiler drum, eliminating the shortcomings of the typical automatic control system. The results of the work can be used in the design of power control systems of steam drum boilers. The results obtained can be used in the development of adaptive control systems for other thermal power facilities.

scholarly journals DEVELOPMENT OF STRUCTURAL SCHEMES AND OPERATION ALGORITHMS FOR THE AUTOMATIC CONTROL SYSTEM OF A MULTIFUNCTIONAL ENERGY COMPLEX

2021 ◽  
Vol 445 (1) ◽  
pp. 82-90
Author(s):  
G. Kalimbetov ◽  
A. Toigozhinovа ◽  
W. Wojcik
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Control Systems ◽  
Dynamic Control ◽  
Control Object ◽  
Control Device ◽  
Automatic Control Systems ◽  
Operating Modes ◽  
Quality Of Control

Among the promising automatic control systems, logical-dynamic control systems that change both the structure and parameters of the control device using switches formed on the basis of a certain logical algorithm have proven themselves well. The use of logical algorithms as part of MACS subsystems for complex technical objects makes it possible to increase the static and dynamic accuracy of control due to purposeful qualitative and quantitative changes in the control signal. This approach will give the control system fundamentally new properties that allow to fully take into account the nature and dynamics of the movement of the control object. When developing existing logical control algorithms, the issues of their application for multi-connected and multifunctional objects control were not considered. Common to existing logical algorithms is that when switching the structure and/or changing parameters, only the dynamics of its own subsystem is taken into account, which is unacceptable in the case of multi-connected dynamic object control, since cross-links have a significant impact on the quality of control. Thus, the problem of synthesis of logical algorithms for multi-connected objects control is an actual theoretical and applied problem. Despite the considerable amount of research conducted in this area, the application of logical algorithms for complex multidimensional objects control is not sufficiently considered, and there is no unified design concept for this type of MACS, taking into account the required quality of functioning in various operating modes. In this regard, there is a need to synthesize algorithms for logical multi-connected control that form control signals in order to coordinate the actions of all separate MACS subsystems in accordance with new external conditions and operating modes. The problem under consideration determined the purpose of this work and the research objectives.

scholarly journals Choosing parameters of vessel’s course automatic control system under the influence of water-wave disturbances

2020 ◽  
Vol 26 (1) ◽  
pp. 27-40
Author(s):  
Максим Валерійович Левінський ◽  
◽  
Валерій Михайлович Левінський ◽  
◽  
◽  
...  
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Control Systems ◽  
Fuel Consumption ◽  
Automatic Control System ◽  
Water Wave ◽  
Manual Operation ◽  
Automatic Control Systems ◽  
Wave Disturbances ◽  
Influence Of Water

opicality. Modern vessel’s course automatic control systems allow to reduce ship’s running time and fuel consumption during voyage compared to manual operation. Effectiveness of their implementation depends on the timely adjustment of the controller parameters following the changes in the vessel’s dynamics, which requires usage of adequate models and qualification of the maintenance stuff.

METHOD ENSURING ACCESS TO INFORMATION TECHNOLOGICAL RESOURCES OF AUTOMATIC CONTROL SYSTEM BY WATER SUPPLY COMPANY

2016 ◽  
Vol 2016 (2) ◽  
pp. 167-174
Author(s):  
Михаил Рытов ◽  
Mikhail Rytov ◽  
Сергей Шпичак ◽  
Sergey Shpichak
Keyword(s):  
Control System ◽  
Water Supply ◽  
Automatic Control ◽  
Control Systems ◽  
Communication Channels ◽  
Access To Information ◽  
Access Policy ◽  
Automatic Control Systems ◽  
Water Supply Company ◽  
Blom's Scheme

The problems of access control to information and technological resources of automatic control systems for water supply companies are considered. The formalized model of the process of reliable access to information and technological resources is shown. The model takes into account the existence of a multitude of communication channels and a possibility of the organization of the operative cross access. A method to ensure a reliable access to information and technical resources of automatic control systems by water supply companies on the basis of the access policy combination, a scheme of deposit and a preliminary distribution of access authenticators. As a base example there was adopted Blom’s scheme. The method allows ensuring an operative cross access in case of emergency. To ensure an operative access in the method mentioned there was used a scheme of a complete division of a secret in the combination with authenticator evolution. As a basic example the evolution of authenticators based on Lamport’s protocol is considered.

MODERNIZATION OF TUNNEL KILN FOR CERAMIC BRICKS CALCINATION LLC «METEKHIS CERAMICS» (GEORGIA)

2017 ◽  
pp. 67
Author(s):  
A.I. Torchinskij ◽  
A.Yu. Ljashko ◽  
Z. Chichua
Keyword(s):  
Automatic Control ◽  
Control Systems ◽  
Tunnel Kiln ◽  
Engineering Equipment ◽  
Automatic Control Systems ◽  
Advantages And Disadvantages ◽  
Manufactured Products ◽  
Aerodynamic Parameters ◽  
Firing Ceramic

Gas-burning devices of SG Series and the system of automatic control of firing ceramic bricks for the tunnel kiln by production of Gas Institute of NAS of Ukraine were mounted at the enterprise LLC «Metekhis ceramics» (Georgia. The analysis of the design features of this type of furnaces was made by the Bulgarian project. The advantages and disadvantages caused by outdated thermal equipment and the lack of aerodynamic parameters of automatic control systems are also considered. The fundamental scheme of the kiln is designed with a new thermo-heating engineering equipment and automatics for thermal and aerodynamic modes regulation The influence of new heating engineering equipment and automatics is considered for the quality of manufactured products, kiln productivity and natural gas specific consumption. Bibl. 5, Fig. 2

scholarly journals USE OF VISUAL PROGRAMMING LANGUAGE FOR SIMULATION OF DYNAMIC SYSTEMS

2021 ◽  
Vol 295 (2) ◽  
pp. 109-115
Author(s):  
Tetiana ROMANENKO ◽  
◽  
Nataliia RUSINA ◽  
Keyword(s):  
Automatic Control ◽  
Control Systems ◽  
Linear Systems ◽  
Programming Language ◽  
Dynamic Systems ◽  
Control Object ◽  
Visual Programming ◽  
Automatic Control Systems ◽  
Visual Programming Language

The article presents examples of research of typical links of linear systems and construction and study of transient functions, namely: research of influence of parameters of elements of systems of automatic control of its quality. Programs for automatic control are developing rapidly, the main areas of which are related to the optimization of technological processes and robotics. This encourages the introduction into modern production of high-precision digital systems with more extensive use of computer systems. In the simulation process, there is often a need to carefully select and apply real objects to study the quality of automatic control systems. This can be achieved by using a visual programming language for modeling dynamic systems and designing VisSim. The connection of parameters of automatic control systems with indicators of its quality is investigated: by definition of error coefficient; research of influence of a constant time of a forcing link on quality of automatic control systems by the method of compensation of the part in the main inertia of the control object, for the use of the forcing link. As a result, of research graphic dependences of quality of linear systems of automatic control, research of influence of a constant of time of a forcing link on its quality, carrying out identification of the regulator and object of management of systems of automatic control are received. Studies of the process of modeling dynamic systems were visually presented using the visual programming language VisSim. In particular, by creating virtual laboratory stands to study the quality of different modes of automatic control systems in relation to the performance of signal generators and the calculation of the necessary parameters of the study.

scholarly journals CONCEPT OF AUTOMATIC CONTROL SYSTEM FOR IMPROVING THE EFFICIENCY OF THE ABSORPTION REFRIGERATING UNITS

2017 ◽  
Vol 8 (4) ◽  
Author(s):  
O. Titlova ◽  
V. Khobin ◽  
O. Titlov
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Production Process ◽  
Control Systems ◽  
Heat Loss ◽  
Automatic Control System ◽  
General Concept ◽  
Ammonia Vapor ◽  
Automatic Control Systems

The general concept of the automatic control systems constructing for increasing the efficiency of the artificial cold production process in the absorption refrigerating units is substantiated. The described automatic control systems provides necessary degree of the ammonia vapor purification from the water in all absorption refrigerating units modes and minimizes heat loss from the dephlegmator surface.

scholarly journals REFINEMENT OF THE REDUCED CHARACTERISTICS OF CENTRIFUGAL BLOWERS IN THEIR ANALYTICAL FORM

2018 ◽  
pp. 94-100
Author(s):  
S. I. Perevoschikov
Keyword(s):  
Natural Gas ◽  
Automatic Control ◽  
Control Systems ◽  
Analytical Form ◽  
Technological Processes ◽  
Automatic Control Systems ◽  
Pipe Line

The article describes methods of simplified and refined correction of the reduced characteristics of centrifugal blowers of natural gas in their analytical form. The correction is carried out with the aim to improve the quality of the translation characteristics from the graphics view to the ana-lytic, where they can be used in automatic control systems of technological processes in gas pipe-line systems.

Automatic Control Systems for Adaptive Optical Systems: Analytical Review. Part 1: Adaptive Optical System Control of Onboard Laser Installations

2018 ◽  
pp. 51-68 ◽  
Author(s):  
Yu. I. Shanin ◽  
A. V. Chernykh
Keyword(s):  
Control System ◽  
Laser Beam ◽  
Automatic Control ◽  
Wave Front ◽  
Control Systems ◽  
Turbulent Atmosphere ◽  
Single Channel ◽  
Optical Systems ◽  
Automatic Control Systems ◽  
Analytical Review

The first part of the analytical review presents an introduction to automatic control systems (ACS) for the adaptive optical systems (AOS) and control of tip-tilt correctors to eliminate a laser beam jitter. Considers a composition and a purpose of the AOS basic components. Also gives the AOS schemes to be used to form the sharper object images and focus radiation on a target when propagating a laser beam in a turbulent atmosphere. Briefly discusses the general issues of the AOS control, namely single-channel and multichannel linear control, bandwidth limitations of the control system, and possible signal paths in ACS of AOS.The article in-detail describes a path of the harmonic signal through the units of the feedback control loop as applied to the plane mirror of a two-channel corrector of the wave front tip-tilt. Provides guidelines to select the minimum quantization time for a propagating digital signal.Considers the certain problems of constructing ACS to be applied to AOS of the on-board laser installations. A simulated installation model where light passes through a turbulent atmosphere allowed us to develop a linear quadratic Gaussian controller (LQG-controller). Using this controller the optimal control (i.e. minimizing the dispersion of the output signal measured) with good robustness of the tip-tilt corrector is carried out.The concluding part of the review presents the certain research results of the AOS control when compensating the laser radiation wave front perturbations caused both by an aero-optical problem, arising when radiation propagates near the walls of an aircraft and by an atmospheric turbulence of free airflow. The influence of a small time delay (within one sampling step), when transmitting a control signal, on the control system operability was under special consideration.

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