Modeling the Operating Modes of a FCD Based on a Hybrid Inductive-Capacitive Element in Power Supply Systems

2021 ◽  
Author(s):  
G. S. Kuleshova ◽  
D. V. Mikheev
Keyword(s):  
Power Supply ◽  
Operating Modes ◽  
Capacitive Element ◽  
Supply Systems

scholarly journals ORGANIZATION OF POWER SUPPLY OF THE FIRST CATEGORY RECEIVERS FOR PERSPECTIVE CIVIL AVIATION AIRCRAFT

2018 ◽  
Vol 21 (6) ◽  
pp. 54-64
Author(s):  
Alexander V. Kechin ◽  
Alexander V. Levin ◽  
Sergei P. Khaliutin ◽  
Boris V. Zhmurov
Keyword(s):  
Electric Power ◽  
Power Supply ◽  
Electrical Power ◽  
Emergency Operation ◽  
Civil Aviation ◽  
Technical Solution ◽  
Operating Modes ◽  
Advantages And Disadvantages ◽  
First Category ◽  
Supply Systems

The article deals with the issue of providing electric power to the first category receivers in the emergency mode of the power supply systems operation of perspective and modernized aircraft. The analysis of the published scientific works performed both in Russia and abroad, and aimed at solving problems of analyzing abnormal operations mode, synthesizing power supply systems and controlling them in order to prevent dangerous consequences is carried out. The authors considered the ingenious technical solutions aimed at providing the necessary quality power supply for the first category receivers in the emergency operation modes of the aircraft power supply systems for the safe completion of flight and landing. The research analysis and generalization of data on the technical characteristics of units and devices developed by the world's leading manufacturers of aviation equipment and used as emergency sources of electrical power on board modern civil aviation aircraft has been completed. The advantages and disadvantages of each technical solution are determined, as well as limitations to the area of their application are formed. The analysis of perspective emergency sources of the electric power including those, which previously were not applied in aviation because of their insufficient technical perfection, for example, hydrogen electrochemical generators is carried out. Based on the performed analysis, a solution which allows improving the operating modes of the electrical batteries is proposed. The offered solution makes it possible to increase the reliability and durability of electrical batteries, as well as the power supply duration of the first category receivers from them.

scholarly journals Determination of the technical condition of electrical equipment in power supply systems

2021 ◽  
Vol 939 (1) ◽  
pp. 012014
Author(s):  
A Rakhmatov ◽  
N Rajabov ◽  
Kh Yakubova
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Electrical Energy ◽  
Electrical Equipment ◽  
Technical Condition ◽  
Supply System ◽  
Operating Modes ◽  
Quality Of Electrical Energy ◽  
Supply Systems

Abstract This article describes the methods and means for determining the technical condition of electrical equipment in power supply systems, particularly in transformer substations. There are many ways to determine the technical condition of electrical equipment. However, their implementation requires complex and additional equipment and devices. In addition, these tests must be carried out when the power supply system is off. This will lead to a decrease in the quality of electrical energy. Determination of the technical condition of electrical equipment using thermal imagers is performed under the voltage and in operating modes, the measurement process does not affect the parameters of the power supply system. The results of research in energy enterprises of the Syrdarya region are presented.

scholarly journals Joint voltage and frequency predictive controllers for distributed generation plants

2021 ◽  
Vol 25 (5) ◽  
pp. 568-585
Author(s):  
Yu. N. Bulatov
Keyword(s):  
Quality Indicators ◽  
Distributed Generation ◽  
Power Supply ◽  
Power Supply System ◽  
Supply System ◽  
Voltage Sag ◽  
Transient Time ◽  
Operating Modes ◽  
Supply Systems ◽  
Predictive Controllers

The paper determines the effect of proposed joint voltage and frequency predictive controllers for distributed generation (DG) plants on quality indicators characterizing the control process in different operating modes of power supply systems. The studies are conducted in the MatLab environment (Simulink and SimPowerSystems simulation packages) employing control engineering methods. It is proposed to design and adjust joint predictive controllers by determining the resonant frequency of oscillations for the master generator rotor. This approach provides better quality indicators of voltage and frequency control in power supply systems while maintaining the same settings for the controllers of DG plants. With an additional load in an isolated power supply system, the maximum voltage sag is found to be 1.75 times lower than for local predictive control and 3.5 times lower as compared to the use of conventional controllers. For the specified mode, predictive controllers enable a threefold reduction in the transient time between rotor rotational speeds in a synchronous generator. In the start mode of a powerful electric motor, the predictive controllers of synchronous generators in the power supply system enable a 1.5 times reduction in voltage sag, with a 1.4 times reduction in overvoltage following its start. In the case of a short-term three phase short-circuit, joint predictive controllers allow a 1.5 times decrease in transient time and a 2.3 times decrease in the overshoot of power line frequency as compared to local control. In addition, frequency oscillation in the power system is also reduced. Similar effects are observed in other operating modes of the considered power supply systems equipped with DG plants. The performed dynamic simulation confirms the effectiveness of using joint voltage and frequency predictive controllers for DG plants, which consists in a positive impact on the quality of processes involved in controlling the parameters of power supply systems in various operating modes.

scholarly journals RESEARCH OF PROPERTIES OF THE FREQUENCY CONVERTER AS THE POWER SUPPLY OF THE SHIP ELECTRIC EQUIPMENT

2017 ◽  
pp. 76-81
Author(s):  
Sergey Vladimirovich Golovko ◽  
Maxim Pulatovich Zhumanazarov ◽  
Nickolay Gennadievich Romanenko
Keyword(s):  
Power Supply ◽  
Frequency Converter ◽  
Voltage Measurement ◽  
Variable Loading ◽  
Public Power ◽  
Electric Power Supply ◽  
The Public ◽  
Operating Modes ◽  
Electric Equipment ◽  
Supply Systems

Data processing, received as a result of voltage measurement at the output of the frequency converter which is used as the electric power supply, was presented. Measurements of output voltage of the frequency converter were taken in case of the variable loading representing various combination of electric motors and glow lamps. Operating modes in case of symmetric and asymmetrical loadings were simulated. The collected data were checked for compliance to requirements of GOST 32144-2013 "Power quality limits in the public power supply systems" regarding the requirement to a sinusoid of the feeding voltage and its harmonious components. Data for handling were obtained on the experimental installation collected at the department "Electric equipment and automation of ships" of the Astrakhan State Technical university.

scholarly journals Promising solutions for the reconstruction of small power supply systems

2021 ◽  
pp. 106-108
Author(s):  
Natalya Anatolyevna Kharlamova
Keyword(s):  
Power Supply ◽  
Energy Sources ◽  
Local Energy ◽  
Small Power ◽  
Operating Modes ◽  
Advantages And Disadvantages ◽  
Supply Systems

Solutions for the reconstruction of low-capacity power supply systems are considered and analyzed. The most promising ones are highlighted. Possibilities of their application at industrial, agro-industrial and municipal facilities have been assessed, possible ranges of payback periods for power generating mini-CHP have been determined. The specificity of operating modes of local energy sources, combination and regulation of heat and power supply loads, their advantages and disadvantages are considered.

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