ANALYSIS OF SCHEME OF COMPENSATION OF REACTIVE POWER IN THE SYSTEM OF TRACTION POWER SUPPLY
Journal Title: Збірник наукових праць Українського державного університету залізничного транспорту - Year 2018, Vol 180, Issue 14
Abstract
The article analyzes the existing methods and systems of reactive power compensation in the traction power supply system. The problem of reactive power compensation has always occupied an important place in shaping the energy efficiency of electric traction. Therefore, to increase the efficiency of the compensation devices, their power should be adjustable depending on the value of the tractive load. Depending on the methods of regulation, a step-by-step control scheme with several sections of a capacitor bank and a smooth control with a thyristor control unit, a static thyristor compensator (STK), is considered. With the advent of powerful high-voltage fully controlled IGBT devices, the introduction of a new type of device began, which is called STATCOM (static synchronous reactive power compensator), whose task is to improve the quality of electricity and increase the efficiency of its transmission and distribution systems by compensating reactive power, regulating voltage and increasing stability of the power systems. In the case of direct connection of STATCOM to networks of the middle class of voltage, multi-level converters are used. Each individual output voltage is generated using PWM modulation with a switching phase shift for each bridge. One of these converters is an H-bridge based converter. An important advantage of this configuration is its modularity, which makes it easy to scale STATCOM when switching to different voltage levels and facilitates the operation and maintenance of the electrical installation.
Authors and Affiliations
Dmitriy Sushko, Serhii Khatnianskyi
Keywords
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