CN2492935Y

CN2492935Y - Low-voltage inductive electric appliance with capacitve compensation

Info

Publication number: CN2492935Y
Application number: CN 01230405
Authority: CN
Inventors: 叶孙础
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-07-04
Filing date: 2001-07-04
Publication date: 2002-05-22
Anticipated expiration: 2011-07-04

Abstract

The utility model relates to a low-voltage inductive electric apparatus with capacitive compensation. A capacitor is cascaded with the coil windings of an existing low-voltage inductive electric apparatus, and by the theory of a resonant circuit, the utility model provides the inductive load with reactive power as the capacitive compensation of the inductive load; as a result, the reactive current of a power transmission line is reduced, the loss of electricity energy is lowered, the terminal voltage of the load is raised, and consequently, the power factor is increased; because the capacitive compensation follows the load, the over-compensation and the transient phenomena of the power transmission line are reduced, as a result, the power supply quality is improved, and the number of expensive facilities, such as a reactive compensator and a reactive compensation controller, is reduced, so that the economy of electricity usesage is increased. The utility model applies to the control of consumption reduction of transformers and electromagnetic iron windings.

Description

The low pressure perception electrical equipment of band capacitive compensation

The utility model belongs to the low-voltage electrical apparatus power-saving technology, specifically sets up capacitor in the low-voltage electrical apparatus of belt coil.

Along with the continuous demand that produces, low pressure perception electrical equipment is also along with increasing, as everybody knows: inductive load is in operation, need from power network, draw perceptual reactive current, set up magnetic field to supply with its iron core winding, so the voltage of electrical network is reduced, and electric energy loss increases, thereby has hindered the output of active power; People improve power factor (PF) in order to reduce electric energy loss at present; Power capacitor is set as reactive power compensation on grid equipment, reduces electric energy loss, improve the electricity consumption economy.And overcompensation is harmful to, though this compensation makes moderate progress to loss, root problem does not solve; Reactive power compensation should and then change along with the variation of inductive load, and for example: the factory's underload or the rest of stopping work just can cause the undesirable transition effect of people unavoidably.Thereby people have set up in transformer station, electric power network system, and diversified reactive-load compensator and reactive power compensation control device reduce transition effect.Just at present, people are the electricity consumption economy of monopole asynchronous motor, usually dispatch from the factory and just worn start capapcitor, what have has also worn the operation capacitor, to improve the starting performance and the runnability of (inductive load) monopole asynchronous motor, but because low-voltage electrical apparatus power is relatively all smaller, and former people are to energy-saving and cost-reducing understanding deficiency; Thereby form not custom with capacitive compensation (capacitor); But the essential reactive current that absorbs of the operation of perceptual electrical equipment reduces voltage, and electric energy loss increases, and hinders active power output; Simultaneously also can cause problems such as the undesirable transition effect of people owing to plant produced needs the peak of power consumption and the low ebb that produce.

The purpose of this utility model, provide a kind of low pressure perception electrical equipment with capacitive compensation, it has outside the existing low pressure perception electrical function, also can reduce transmission line reactive current, reduce the wastage, load terminal voltage is raise, improve power factor (PF), reduce transition effect.

In order to achieve the above object, the utility model on low pressure perception electrical equipment, is set up capacitor as capacitive compensation; Be on the coil windings of low pressure perception electrical equipment, (on the spiral in ductor of lead coiled) parallel connection connects suitable capacitor, with the resonant circuit principle, supply with the reactive power of inductive load, reduce the reactive current in the transmission line, to reduce line drop, reduce electric energy loss, improve the electricity consumption economy.

Because it is a kind of compensation of following load, so can reduce the overcompensation and the transition effect of electrical network, reduce the reactive current of transmission line, to reduce reactive-load compensator expensive in the electrical network and reactive power compensation control device, compensating device reduces the wastage and improves exerting oneself of inductive load electrical equipment afterwards.

Embodiment further specifies the utility model below in conjunction with accompanying drawing:

Fig. 1: be the utility model embodiment schematic diagram.

Fig. 2: be another embodiment schematic diagram of the utility model.

Among the figure, 1 coil windings, 2 iron cores, 3 capacitors, 4 armature.

By finding out among Fig. 1: it is that the utility model is used for low-tension transformer embodiment; Capacitor (3) it be and be connected in, on the coil windings (1) on the iron core (2), with the resonant circuit principle, (the resonant circuit principle is generally illustrated in diversified reactive-load compensator) supplies with the reactive power of this circuit, reduce the reactive current in the transmission line, reduce electric energy loss; This technology is adapted to low voltage control The Energy Conservation of Transformer consumption reduction especially.

Find out in Fig. 2: it is that the utility model is used for the electromagnet coil winding embodiment; Coil (excitation) winding (1) is on the iron core (2); After the excitation winding of electromagnet fed alternating current, the magnetic flux that electric current produced (φ) formed the closed-loop path through iron core (2) and armature (4), made iron core and armature produce opposed polarity (Z) and (S) attracted; And capacitor (3) is and be connected on the coil windings (1); When the electromagnet coil winding moves, supply with the reactive power of this circuit by capacitor, as the capacitive compensation of inductive load; Reduce the reactive current of transmission line, reduce the wastage, make load terminal voltage to raise, improve power factor; Because it is a kind of compensation of following load, thus the overcompensation and the transition effect of electrical network can be reduced, thus can improve grid supply quality, the expensive facility of reactive-load compensator and reactive power compensation control device improves the electricity consumption economy in the minimizing electrical network; Present embodiment is adapted to horseshoe type, clapper-type, helix tube type etc., the consumption reduction of multiple electromagnet coil winding.

Claims

1, a kind of low pressure perception electrical equipment with capacitive compensation, it be is characterized in that: go up and be connected with capacitor (3) at winding (1) by the low pressure perception electrical equipment that winding (1), iron core (2) and armature (4) etc. are formed.