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Moscow, Russia

Sviderskii A.G.,ZAO Interavtomatika
Thermal Engineering (English translation of Teploenergetika) | Year: 2011

Main factors that must be taken into account in constructing modern distributed microprocessor systems for control of thermal power plants are analyzed. The list of these factors includes the nature of a plant being automated and its spatial arragement, specific features of the basic computerized automation system, advisability of organizing exchange of digital information with peripheral equipment (sensors and actuators), routing of cable lines, power supply, and organizing redundancy in hardware and networks. Problems con-cerned with integration of local automatic control systems supplied complete with process equipment into a united automated process control system and uniting process control systems of heat-generating, mechanical, and electrical equipment are considered. Examples illustrating implementation of distributed process control systems constructed on the basis of the Teleperm XP-R and SPPA-T3000 computerized automation systems manufactured by Siemens are given. © Pleiades Publishing, Inc., 2011.

Bilenko V.A.,ZAO Interavtomatika
Thermal Engineering (English translation of Teploenergetika) | Year: 2011

The class of multi-loop automatic control systems is considered in which several control inputs are produced for maintaining the main controlled quantity. It is shown that the methods developed for well- known multi-loop structures with several controlled variables can be used in analyzing and synthesizing such systems. It is demonstrated that, if multi-loop automatic control systems producing several control inputs and comprising local automatic control systems with several controlled variables contain inertial loops separated by a low-inertia leading loop, then such loops can be decoupled by frequency. A multi-loop system for auto- matically controlling steam temperature in a once-through boiler is studied. Peculiarities connected with implementation of such structures are described taking into account the design features of boiler equipment and current requirements for setting up technological modes of operation. © Pleiades Publishing, Inc., 2011.

Bilenko V.A.,ZAO Interavtomatika
Thermal Engineering (English translation of Teploenergetika) | Year: 2010

Two approaches for constructing multiply connected automatic closed-loop control systems are compared with each other: the traditional one, according to which individual control channels are separated and the structural synthesis is decomposed, and the approach according to which a unified multiply connected controller synthesized by means of the optimal control theory is used. Advantages of the traditional approach are shown. The principle of decoupling natural motions in a multiply connected closed-loop control system is described, and different structural versions of decoupling are compared with respect to their dynamic and performance characteristics. © 2010 Pleiades Publishing, Ltd.

Naumov S.A.,Central Repair and Mechanical Works of Mosenergo | Naumov A.S.,ZAO Interavtomatika | Shvetsov D.P.,Prosoft | Krymskii A.V.,OOO Monitoring
Thermal Engineering (English translation of Teploenergetika) | Year: 2011

The algorithms, procedures, and modules for making expert estimates of the technical state of automatic control and protection systems for different types of turbines by means of the SPIDER mobile computerized automation system are presented. It is shown that owing to high trustworthiness with which the kind and location of hidden defects of units are determined without disassembling them, repair works can be scheduled in the optimal way and the costs for carrying them out can be reduced. © 2011 Pleiades Publishing, Ltd.

Zhigunov V.V.,ZAO Interavtomatika | Shavochkin I.A.,ZAO Interavtomatika
Thermal Engineering (English translation of Teploenergetika) | Year: 2011

Different versions of systems for automatic closed-loop control of the power output of power units are analyzed. A new version of the automatic power control system is proposed together with a method for tuning it. Results from model studies and tests of the proposed automatic power control system structure at a real plant are presented. © Pleiades Publishing, Inc., 2011.

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