Phase-shifting transformer system and control method thereof

Abstract

The invention discloses a phase-shifting transformer system which comprises a series branch and a parallel branch. The series branch comprises a seventh isolation disconnecting link, a sixth breaker, a phase shifter body, a ninth breaker and a tenth isolation disconnecting link which are sequentially in serial connection, wherein an eighth grounded disconnecting link is installed between the sixth breaker and the phase shifter body, and an eleventh grounded disconnecting link is installed between the phase shifter body and the ninth breaker; and the parallel branch comprises a second isolation disconnecting link, a bypass breaker and a fourth isolation disconnecting link, wherein a third grounded disconnecting link is installed between the second isolation disconnecting link and the bypass breaker, and a fifth grounded disconnecting link is installed between the bypass breaker and the fourth isolation disconnecting link. The phase-shitting transformer system is capable of meeting the requirement for switching different operation manners of a phase shifter system during normal operation of the phase-shitting transformer system, and guaranteeing the fact that a phase shifter can quickly exit from an electrical power system and is free from affecting normal operation of lines during failure of the phase-shitting transformer system so that safe reliability of the electrical power system is guaranteed. The invention further discloses a control method of the phase-shifting transformer system.

Description

technical field [0001] The invention belongs to the field of FACTS (Flexible AC Transmission Systems), and in particular relates to a phase shifter system structure. Background technique [0002] With the development of the economy, the power load continues to increase, which puts forward higher requirements on the transmission capacity of the power grid. However, the area of ​​the load center at the receiving end is generally small, the line corridor resources are scarce, and the construction cost of the power grid is high. At the same time, the existing transmission network also has the problem of unbalanced line power flow, some lines are heavily loaded and some lines are lightly loaded, and the line utilization rate is insufficient. Therefore, while adding new transmission lines, it is also urgent to improve the utilization rate of existing lines and improve the transmission capacity of the power grid. [0003] The phase shifter (phase-shifting transformer) is an effec...

AI Technical Summary

Problems solved by technology

However, for systems with phase shifters installed, when the phase shifter is out of operation, the transmission line needs to maintain normal operation. Therefore, the circuit breakers and knife switches of the existing conventional transformer configuration are not comprehensive enough to meet the different operations of the phase shifter system. The needs of the method need to be improved

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