Phase shifting device and control method thereof

Abstract

The invention discloses a phase shifting device and a control method thereof. The phase shifting device is connected in series in an outgoing line of the transformer substation. The phase shifting device comprises a bypass branch and at least two phase shifting branches. The bypass branch and the phase shift branch are connected in parallel. The phase-shifting branch comprises a first isolating switch, a second isolating switch, a first circuit breaker and a phase-shifting transformer; the first circuit breaker and the phase-shifting transformer are connected in series between the second end of the first isolating switch and the first end of the second isolating switch; the bypass branch comprises a third isolating switch, a fourth isolating switch and a second circuit breaker; and the second circuit breaker is connected in series between the second end of the third isolating switch and the first end of the fourth isolating switch. According to the embodiment of the invention, the safety and reliability of the power system can be improved, and the transportation and installation difficulty of the phase-shifting device is reduced.

Description

technical field [0001] The invention relates to the technical field of electric power systems, in particular to a phase shifting device and a control method thereof. Background technique [0002] With the increasing complexity of the power grid and the continuous improvement of power supply quality requirements, the degree of interconnection of the power grid is getting higher and higher, and it has developed into a huge power system. What follows is the problem that the economy and reliability in the process of power grid operation regulation cannot be guaranteed. [0003] In order to solve the problem of safety and reliability of power grid transmission lines and realize efficient utilization of transmission lines, the prior art introduces phase-shifting transformers as a means of controlling power flow. The phase-shifting transformer achieves the purpose of controlling the power flow by injecting compensation voltage and changing the phase difference at both ends of the ...

AI Technical Summary

Problems solved by technology

However, in the actual application process, since the phase-shifting transformer is connected in series in the outgoing line, when the phase-shifting transformer is out of operation due to failure or maintenance, it will affect the normal operation of the line; and in the application scenario of large capacity and high voltage level, large The volume of the capacity phase-shifting transformer is too large, which will cause problems such as inconvenient transportation and installation.

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