Different-capacitance transformer paralleling alternate operation electricity-saving method and device

Abstract

The invention discloses a different-capacitance transformer paralleling alternate operation electricity-saving method and device, and belongs to the field of intelligent electrical equipment. The different-capacitance transformer paralleling alternate operation electricity-saving method is characterized by comprising the following steps: gathering operation rules of loads, and confirming time periods when a maximum value, a minimum value and a peak value appear; arranging more than two transformers with different capacitances, a switching controller and an adjusting compensation mechanism, wherein the transformers with the different capacitances are switched in a flexible mode through the switching controller and the adjusting compensation mechanism; compensating and switching the transformers according to an electricity-consuming load peak operation rule, and enabling the capacitances of the transformers which are put in service to be slightly larger than electricity-consuming loads. The method and device has the advantages that the capacitances of the transformers are timely and precisely adjusted to achieve economical operation, operational loss of the transformers is effectively reduced, power supply is ensured due to the fact that the transformers are switched in the flexible mode, non-load loss can be effectively reduced, the device is applicable to places with largely-changed loads, and reliability of the power supply is increased.

Description

technical field [0001] The invention provides a power-saving method and device for parallel and alternate operation of different-capacity transformers according to load conditions, and belongs to the field of intelligent power equipment. Background technique [0002] Power system loads, especially living quarters, hospitals, schools, office buildings, and discontinuously operating factories and mines, undergo repeated peak-valley-peak changes every day, and a large amount of electricity is wasted during holidays. [0003] At present, the selection of transformer capacity is basically based on the method of referring to the peak capacity and the simultaneous rate. When the load is low, the operating capacity most of the time is only a dozen or even a few tenths of the high load. For transformers with large and small capacities, the no-load loss varies greatly, and the load loss is nearly ten times the no-load loss. For decades, in order to save the no-load loss, the transfor...

AI Technical Summary

Problems solved by technology

In particular, the operation of changing the capacity of the capacity regulating transformer needs to be carried out in a power outage state. Every time the capacity of the capacity regulating transformer is changed, the user must be powered off. operational factors

[0005] The capacity of these original transformers does not conform to the actual situation, and the adjustment range is not enough. It can only save the no-load loss, and the load loss cannot be saved. The load loss is nearly ten times the no-load loss, and the energy consumption is even greater.

The failure of the transformer cannot be detected in time, and it can only be repaired by power outage, which affects the reliability of power supply and normal power consumption

The losses caused by planned power outages and unprepared sudden power outages are quite different

The load in different periods of the living quarters is very different, and the low load period is much larger than the high load period, which requires a change process for the transformer device, otherwise it is easy to cause huge losses or insufficient capacity, causing the transformer to burn out

In actual operation, the load of each phase of the three-phase power is different, and accidents are prone to occur

[0006] The existing constant-capacity transformer switching scheme needs to add too many transformers, and the investment cost is too high

Images