PNRPU Bulletin. Electrotechnics, Informational Technologies, Control Systems

The article discusses the mathematical models used for the improvement of gas turbine power plant control system of low and medium levels of power. It is shown that it is more efficient to use a joint model that includes both gas turbine plant and a synchronous generator in the simulation. This model is created with the use of the methods of system identification theory and can be used for the development of advanced gas turbine control algorithms.

In the article the automated indicator definition procedure of the paper flaw, as one of the key indicators of pulp-and-paper branch production quality is considered. The proposed solutions are directed on facilitation, increase of efficiency and overall performance of the laboratory staff, providing quality control of production and productions. Hardware and software implementation of the proposed automated system has been described. Thus the generalized algorithm of newsprint flaw determination procedure is developed. Its main stages have been formalized: computation of pixels density, area separation of a paper sample for its analysis, paper cropping procedure, sorting procedure of motes for the changeable parameter of the area. Experiments with different samples of paper were made. It allowed to set that in case of high paper quality the flaw recognition happens quicker and more precisely, than in case of poor sample quality (with bends, roughness of edges and other perturbing factors), and also to reveal the perspective directions for image identification procedure enhancement.

Macromodular approach of development of programs which allows to reduce complexity of migration on new libraries and a choice of optimum library is considered. The short description of macromodular approach, a technique of its application and the main received results will come in dream. Overhead costs of use of macromodular approach on test computing systems do not exceed 1 ms. The automatic choice of the most efficient realization with use of the scheduler is carried out more than in 80% of cases, and losses of time from an inaccurate choice do not exceed 6 %. Use of macromodular approach allows to reduce migration time for new library more than by 4 times.

The paper presents an approach to automation of accounting systems of energy parameters of housing and communal services on the basis of sensor networks, providing new features, including the allocation of the registration of the energy parameters, wireless data transmission, remote access to the results of the accounting division of user rights, an analytical apparatus. Automated Energy accounting housing and communal services based on ZigBee technology will create an information infrastructure to collect data for energy consumption to ensure transparency, ensure centralized accumulation and processing of energy parameters, including profiles of consumption and waste, help to identify wastage of energy resources, identification of technologically feasible level energy, predict and normalized energy consumption. A block diagram of the automated system and block diagram of the data acquisition subsystem of energy accounting utilities are presented.

This article discusses the energy savings for modernization of the asynchronous electric drive pump station. The use of engines with a capacity of 55 kW instead of engines with a capacity of 160 kW reduces amperage of the transformer improves the power factor at the load and leads to savings in electrical energy.