Abstract
This publication considers the issues of development of the software program for designing of 0,4 kV power supply systems with motor-actuated load under voltage unsymmetry conditions (using the example of the Trans-Baikal Territory). Voltage unsymmetry is practically constant phenomenon in the electric power networks of different voltage types. Voltage unsymmetry effects significantly the electric power consumers, including the supply mains itself. It has especially negative impact on the electrical equipment operation process and its lifetime. The urgency of the problem is confirmed by multiple research on the same topic and by significant number of damages suffered by the electric power consumers staying in service (especially in the Trans-Baikal Territory and in the Far-East regions). Voltage unsymmetry causes economic loss and reduction of the electromagnetic interference value by the voltage unsymmetry coefficient in negative-phase sequence (K 2 U) gives inevitable economic effect accordingly. However, the payback period for the activities aimed at reduction of electromagnetic interference, will vary from some months to several years. The more accurate value of the payback period may be obtained using the developed software program. The developed software design program is implemented by means of the programming language C# in Microsoft Visual Studio environment, using the built-in cross-platform database SQLite. The software program shall allow making quick and accurate calculation of the power losses, to determine the economic feasibility of provision special measures for removal of the voltage unsymmetry, for determination of optimal application and location of the balancing devices. The software implementation in power systems loaded with electric motors will improve reliability and efficiency of asynchronous motors. The software is of interest for developers of projects on power supply systems for regions with non-linear loads.
Highlights
A special attention is given to the problems of electric energy quality
In modern conditions quality parameters of electric power such as voltage unbalance, unsinusoidality, become common factors which significantly reduce an efficiency of the power supply systems themselves and, an efficiency of consumers connected to them
A study of the main electric power quality parameters for the network equipment of 0.4, 6 and 35 kV power system in Zabaykalsky Krai showed that deviation of main quality parameters of electric power, such as voltage unbalance, voltage unsinusoidality is a common factor in Zabaikalsky power system
Summary
A special attention is given to the problems of electric energy quality. In modern conditions quality parameters of electric power such as voltage unbalance, unsinusoidality, become common factors which significantly reduce an efficiency of the power supply systems themselves and, an efficiency of consumers connected to them.A study of the main electric power quality parameters for the network equipment of 0.4, 6 and 35 kV power system in Zabaykalsky Krai showed that deviation of main quality parameters of electric power, such as voltage unbalance, voltage unsinusoidality is a common factor in Zabaikalsky power system. A special attention is given to the problems of electric energy quality. In modern conditions quality parameters of electric power such as voltage unbalance, unsinusoidality, become common factors which significantly reduce an efficiency of the power supply systems themselves and, an efficiency of consumers connected to them. A study of the main electric power quality parameters for the network equipment of 0.4, 6 and 35 kV power system in Zabaykalsky Krai showed that deviation of main quality parameters of electric power, such as voltage unbalance, voltage unsinusoidality is a common factor in Zabaikalsky power system. Due to unsatisfactory condition of the electric energy quality in distribution networks of Zabaikalsky power system, there is a large number of electrical failures at the consumer’s facilities.
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