Abstract
The effect of the static synchronous compensator (STATCOM) on distance protection of a high-voltage transmission line is studied in this article. To carry out the research stated in the topic of the paper, an experimental scheme was developed, equipment was selected, the operation settings of the 3 stages of distance protection were calculated and quad characteristics were built on their basis. All listed above, as well as further experiments, were carried out by the real time digital simulator. The STATCOM model was integrated in the scheme and set next. A series of experiments was carried out: two-phase and three-phase short circuits in various nodes of the scheme with and without the compensator and in various connection nodes. After all the experiments were carried out, appropriate conclusions were made about the impact of FACTS devices on the operation of distance protection. Possible ways to solve detected problems were also proposed.
Highlights
Flexible alternating current transmission systems (FACTS) – a set of technical and information tools for automatic control of transmission line parameters – are widely spread and developed [1]
One of the most widely used basic protection of 110–220 kV lines is distance protection (DP), the principle of this one is to calculate the resistance based on measured voltages and currents
The regulatory documents used in Russia for setting up distance protection do not contain any recommendations for their operation in networks with flexible alternating current transmission systems (FACTS) devices [3]
Summary
Flexible alternating current transmission systems (FACTS) – a set of technical and information tools for automatic control of transmission line parameters – are widely spread and developed [1]. Many problems are solved with the help of these devices: increasing the transmission capacity of power lines; ensuring the stable operation of the power system under various disturbances; improving the reliability of energy saving of consumers; reduction of losses in electrical networks. One of such devices is a static synchronous compensator (STATCOM). The regulatory documents used in Russia for setting up distance protection do not contain any recommendations for their operation in networks with FACTS devices [3]. Perhaps this is due to the low prevalence of FACTS in Russia, but recently such devices have been shared quite actively
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