PNRPU Bulletin. Electrotechnics, Informational Technologies, Control Systems

In article the questions connected with the systems of automatic control arranging the frequency of the operated generator are considered so that it was equal to the frequency of a basic signal. Adjustment is carried out thanks to existence of negative feedback. The output signal of the operated generator is compared on the phase detector to a basic signal, the result of comparison is used for fine tuning of the operated generator. The system of FAPCh is used for frequency modulation and demodulation, multiplication and transformation of frequency, a frequency filtration, allocation of basic fluctuation for coherent detecting and in other purposes. Compares phases of entrance and basic signals and removes the mistake signal corresponding to a difference between these phases. The signal of a mistake passes further through the filter of low frequencies and is used as the managing director for the generator operated by tension (GUN), providing negative feedback. If output frequency deviates from basic, the signal of a mistake increases, influencing GUN towards reduction of a mistake. In an equilibrium state the output signal is fixed at a frequency of the basic. Research of digital FAPCh was conducted with use of imitating modeling. The block diagram of digital FAPCh and its components is in detail considered. For determination of all parameters s ( n ), v ( n ), e ( n ), q ( n ), y ( n ) and r ( n ) of FAPCh the program in the C+ programming language was written. Evident schedules of change of an entrance signal of s 1( n ) and s 2( n ), signal at the exit from the loopback e 1( n ) and e 2( n ) filter, a signal at the exit from the phase detector v 1( n ) and v 2( n ), change of transfer function r 1( n ) and r 2( n ), an output differential signal of r 1( n ) and r 2( n ), change of a signal from an exit of GUN y1( n ) and y2( n ), constructed with use of spreadsheets of Excel are received. The detailed technique of the solution of the same task by means of imitating modeling in a MatLab package is described. The function chart of FAPCh in a MicroCAP-8 package which allowed to remove the schedule of change of LAChH of digital FAPCh is developed.

The modern civilization has faced with three global interrelated problems: growing energy consumption, shortage of energy resource and increasing environmental pollution. With 7.162 billion pers. population of 2013 year, 11 billion pers. prognostic population to 2050 year and the current growth of energy consumption per capita the required energy consumption may rise double. Fossil fuels combustion by the modern combustion technologies could lead to annual emissions into the environment up to 57 gigatons of carbon dioxide. This phenomenon can lead to unpredictable natural disasters. The specific fuel resource is municipal solid waste (MSW) which is constantly formed as a result of human activity. During the year resident of a City forms 350…360 kg Solid Waste. They can be directed for incineration to Steam Turbine Power for electric power generation companies of heat and hot water. The natural decay process or incineration (accelerated oxidation) are parts of the natural cycle of substances in nature. Therefore Incineration of solid waste does not increase fundamentally environmental burden on nature. The ecologically correct formed the combustion process can lead to even less. emission of flue gases standardized components to the atmosphere. Along with Large (gigawatts) Incineration Steam Turbine Complex the same Gas Turbine Complex of less power is the object of interest for small towns. Environmental indicator of such complex allows to build it up within served territory. With full cost recovery of complex due to the commodity of electricity, district heating energy, and implementation of secondary raw materials this Gas Turbine Complex in fact is the local energy source and also is the key to solve MSW problems of small municipal territory. On the base of preliminary analysis a chosen fuel for Gas Turbine Installation is producer gas - product of MSW gasification. Working media for a turbine is high temperature air heated by combustion product. The combustion chamber is placed behind the turbine. Therefore turbine blades erosive damage is impossible. The peculiarity of Low calorific gas combustion process is taken into account. As a result for Gas Turbine Installation of Regenerative Cycle the special gas-air massflow rate correction is used. At a temperature 1173 K before a turbine (have used coolness turbine blades) the Gas Turbine Installation Efficiency is not less than 32 %.

The research in wind power area adopted by South Ural State University, have demonstrated a high indicators of electric energy generation by 0.1-30 kW power family vertical axis wind turbines. The methodology of rapid (cluster) R&D of experimental prototypes, developed at the University, is worth the systematic approach while designing the electromechanical components, showing their advantages as well as the competiveness of components. The research showed both advantages and disadvantages of development process and the components design, which is normal under the R&D experimental prototyping stage. The main problems are the unbalance of vertical axis rotor, excessive mass of turbine operating part andnon-stable operation of software for power controller. The tasks of further research include the reduction of working components mass, rotor unbalance removal by dynamic balancing, and improvement of power takeoff control software. The significant areas of research should be a further development of air foil materials, efficient vibration dampers, aerodynamic and electromechanical control of rotation frequency.

The paper proposes an evolution heuristic algorithm for optimization of distributed generation power system. The local segment of active - adaptive network consisting of four generators and six consumers is used as an example. In a local active-adaptive network conditions defined distribution of electricity from generators to consumers, as well as solve the problem of optimizing the distribution of the total power with the help of genetic algorithm. Random values of transmission power from generators to consumers, forming the population - a set of individuals characterized by chromosomes, is a numeric vector corresponding to the parameters of power are given. Each individual is an individual solution to the optimization problem. Next, the algorithm generating values change, achieving the highest growth rate of the utility function. In order to prevent the algorithm stops when it reaches a local maximum at each step mutations - random changes in part of the chromosome. A comparison of the solution with the solution unbalanced transportation problem. Experimental studies are based on the HIL local active-adaptive network, realized on the basis of laboratory equipment the department Microprocessor Means of Automatization department of Perm National Research Polytechnic University. The work was performed as part of the grant of the President of the Russian Federation for state support of young Russian scientists - candidates, MK-5279.2014.8 "Synthesis of efficient technologies for remote monitoring and managing of intellectual power system with active-adaptive network".

The article deals the basic modern software tools for automate performance testing of distributed applications, such as IBM Rational Performance Tester, HP Load Runner, Apache JMeter, SilkPerformer, WAPT, in terms of their applicability to performance evaluation of software of distributed monitoring systems (MS). Brief characteristics and the main features of each software test automation tools are considered. A short description of a typical monitoring system is presented. The features of performance testing of MS that must be satisfied by performance tools are showed. The basic methods of testing performance of monitoring systems are discussed. The article includes analytical review of software test automation tools with the requirements of monitoring systems. Results of the comparative analysis are provided. In conclusion, disadvantages and limitations of these tools using monitoring system are indicated and the possible ways of their elimination are given.