An on-load capacity regulating distribution transformer and corresponding capacity regulating method
A distribution transformer and capacity adjustment technology, applied in transformer/inductor parts, transformers, variable transformers, etc., can solve the problem of high failure rate of on-load capacity adjustment distribution transformers, reduce losses, reduce failure rates, Increase the effect of the buffer device
Active Publication Date: 2019-11-08
云南电网有限责任公司丽江供电局
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Problems solved by technology
[0006] The present application provides an on-load capacity-regulating distribution transformer and a corresponding capacity-adjusting method to solve the problem in the prior art that the on-load capacity-regulating distribution transformer has a high failure rate in the process of capacity adjustment
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Embodiment 1
[0100] Embodiment 1, the on-load capacity regulating distribution transformer of the present application can also keep the short-circuit impedance of the distribution transformer unchanged during the capacity regulating process;
[0101] When the distribution transformer increases the number of turns, it will increase the short-circuit impedance of the distribution transformer. In the embodiment of the present application, the short-circuit impedance can be kept unchanged by reducing the winding height of the distribution transformer and the distance between the coils;
[0102] According to the distribution transformer short-circuit impedance percentage is By reducing the thickness of the distribution transformer winding, reducing the distance a between the high and low voltage side coils and the average length mlt of the coils to offset the increase in the short-circuit impedance due to the increase in the number of winding turns, to ensure that the short-circuit impedance of...
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The embodiment of the invention discloses an on-load capacitance regulating distribution transformer and a corresponding capacitance regulating method. The on-load capacitance regulating distributiontransformer comprises a capacitance regulating assembly, a high-voltage on-load regulator, a low-voltage on-load regulator, a measuring device and a control device, the capacitance adjusting assemblyis connected with the high-voltage on-load regulator and the low-voltage on-load regulator, the high-voltage on-load regulator and the low-voltage on-load regulator are connected with the control device, and the measuring device is connected with a current mutual inductor in a power system and the control device. The high-voltage on-load regulator and the low-voltage on-load regulator are controlled by the control device to allow the high-voltage on-load regulator and the low-voltage on-load regulator to operate high-voltage and low-voltage winding groups, the on-load capacitance regulation ofthe distribution transformer is achieved by changing the number of turns and layers and / or the spacing between the coils of the high-voltage and low-voltage winding groups, the faulting rate of the distribution transformer is effective reduced, buffering devices are further arranged in the high-voltage on-load regulator and the low-voltage on-load regulator, and therefore the generation of electric arc is reduced.
Description
technical field [0001] The present application relates to the field of power system power distribution, in particular to an on-load capacity regulating distribution transformer and a corresponding capacity regulating method. Background technique [0002] The period of electricity consumption in rural areas of our country includes the peak season and off-season of electricity consumption. During the peak season of electricity consumption, distribution transformers usually operate under overload conditions. It may cause the distribution transformer to run in the no-load state, that is, the phenomenon of "big horse and small cart". Long-term use of distribution transformers under overload conditions and no-load conditions will cause serious loss of distribution transformers. In urban electricity consumption, there are peak and valley periods of electricity consumption. The difference in electricity consumption between the peak period and the low period of electricity consumpti...
Claims
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IPC IPC(8): H01F29/04H01F27/28H01F27/29H01F27/40H02P13/06H02J3/12
CPCH01F27/28H01F27/29H01F27/402H01F29/04H02J3/12H02P13/06
Inventor 文志林胡凡君木孙渡彭涛和智高史卫平
Owner 云南电网有限责任公司丽江供电局