Multifunctional power flow controller suitable for multiple channels and double loops

Abstract

The invention provides a multifunctional power flow controller suitable for multiple channels and double loops. The multifunctional power flow controller comprises an MMC1, an MMC2, four controllableswitches S1-S4, eight transformers T1-T8 and a control circuit, wherein the MMC1 and the MMC2 are connected back to back, and the control circuit is used for controlling actions of the MMC1, the MMC2and the controllable switches S1-S4. The alternating current end of the MMC1 is electrically connected with transformers T2 and T3 arranged on the first double-circuit line through a controllable switch S1 and a transformer T1, and is electrically connected with a bus through a controllable switch S2 and a transformer T7; and the alternating current end of the MMC 2 is electrically connected withtransformers T5 and T6 arranged on the second double-circuit line through a controllable switch S4 and a transformer T4, and is electrically connected with the bus through a controllable switch S3 anda transformer T8. When the controller is used, the UPFC or IPFC working mode can be correspondingly switched according to the power grid power flow control requirement, multiple purposes are achievedthrough one device, and therefore the arrangement number and cost of power grid power flow control equipment are reduced.

Description

technical field [0001] The invention relates to the technical field of power grid power flow control devices, in particular to a multifunctional power flow controller suitable for multi-channel and double-circuit. Background technique [0002] With the continuous expansion of the grid scale and the increasing number of new energy generation grids, the structure of the grid has become increasingly complex, and higher requirements have been put forward for the stable and reliable operation of the grid. Flexible AC Transmission Systems (FACTS) is a power transmission and distribution system that can flexibly regulate the power flow of the line, which is of great significance for ultra-high voltage long-distance power transmission. Unified Power Flow Controller (UPFC) and Interline Power Flow Controller (IPFC) are commonly used controllers in FACTS. UPFC is currently the most comprehensive FACTS controller with parallel compensation , series compensation, phase shifting and ter...

AI Technical Summary

Problems solved by technology

Although the current method of using FACTS controllers to control the power flow of double-circuit lines is effective, the number of FACTS controllers used is relatively large, and the cost of control equipment is relatively high. Therefore, the existing power flow controllers continue to be improved to reduce It is necessary to set the layout cost

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