Split core type magnetic control intelligent transformer and control method

Abstract

The invention relates to a magnetic control transformer technology, in particular to a split core type magnetic control intelligent transformer and a control method, a transformer iron core comprisesthree phases of iron core columns, an upper yoke and a lower yoke, each phase of iron core column is divided into a first half iron core and a second half iron core, and the length is L; each half iron core is provided with a section of small iron core with the length of lt, the section shape being the same as that of the half iron core and the section area being half of the section area of the half iron core; lt is less than L; a transformer winding structure comprises a secondary side winding with a half number of turns wound on each half iron core, a primary side winding surrounds the secondary side winding and wraps the first half iron core and the second half iron core, and an insulation distance is reserved between the primary side winding and the secondary side winding. According tothe transformer, the excitation reactance of the transformer is adjusted through direct-current excitation, voltage control without an on-load voltage regulating switch can be achieved while the buck-boost function of a traditional transformer is achieved, and reactive power can be dynamically and smoothly adjusted and voltage can be stabilized in cooperation with a fixed capacitor bank.

Description

technical field [0001] The invention belongs to the technical field of magnetic control transformers, in particular to a split-core magnetic control intelligent transformer. Background technique [0002] At present, the role of the transformer in the power system is only a single step-up and step-down function. When the grid load fluctuates, the voltage will fluctuate accordingly. In the prior art, the voltage regulation methods adopted by the transformer to deal with the voltage fluctuation mainly include: (1) The existing transformer on-load voltage regulation methods in 10kV or 35kV voltage distribution network mainly use mechanical and electric components, which are slow in action and prone to arcing; (2) Part of the on-load voltage regulation device uses power electronic switches to realize taps Due to the high operating cost of power electronic devices, they are easily affected by lightning shocks, and the power consumption of thyristors is large, which requires high c...

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Problems solved by technology

The invention patent "A Magnetically Controlled Reactor Capable of Rapid Excitation and Demagnetization" (CN 106300384B) filed on September 29, 2016 is a reactor that does not have the step-down function of a transformer and can only be used as a reactance

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