CN202258757U

CN202258757U - Electronic current transformer adopting various energy harvesting modes

Info

Publication number: CN202258757U
Application number: CN2011203237909U
Authority: CN
Inventors: 杨茜
Original assignee: China XD Electric Co Ltd
Current assignee: China XD Electric Co Ltd
Priority date: 2011-08-31
Filing date: 2011-08-31
Publication date: 2012-05-30
Anticipated expiration: 2021-08-31

Abstract

The utility model provides an electronic current transformer adopting various energy harvesting modes. The electronic current transformer comprises a sensing head, a base, a sleeve connected between the sensing head and the base, and a signal combining unit connected with the base through an optical fiber, wherein a collector, a measuring coil connected with the collector, an energy supply coil and a storage battery are arranged in the sensing head; and a primary conducting rod penetrates the measuring coil and the energy supply coil. The storage battery connected with the collector is arranged in the sensing head to serve as a standby energy supply mode, and can stably provide a signal to the collector to ensure stable signal output when the voltage of a primary bus is unstable or is zero.

Description

A kind of various electronic current mutual inductor of getting the ability mode

Technical field

The utility model relates to a kind of high-tension electricity current measure device, particularly a kind of various electronic current mutual inductor of getting the ability mode.

Background technology

At present, the development of digitlization power station is rapid, and electronic current mutual inductor will be used widely.The electronic current mutual inductor insulation system is simple and reliable, and volume is little, quality is little, good, the no saturated phenomenon of the linearity, and the output signal can directly be imported microcomputer metering and protection equipment interface.Because the optical cable more cheap than cable adopted in signal output, thereby reduced integrated cost.

Whether needs provide power supply to electronic current mutual inductor according to the primary transducer part at present, can be divided into two types of active formula and passive types.

If primary transducer is the electromagnetic measurement principle, primary transducer will convert the electrical output signal of primary transducer into light signal, seen off by fiber optic transmission system again.Primary transducer is an electronic unit, needs the power supply power supply, and this type of instrument transformer is active electronic transformer.The required power supply of primary transducer is to adopt the energy supply coil to gather from bus; Problem is that the electric current excursion is very big in the bus; From the no-load current to the rated current, and short circuit current and lightning impulse current when breaking down, all require to guarantee the reliable output of DC power supply; Be that this method can not provide enough voltage to export the work of keeping sensing head under zero the situation at bus current.

The utility model content

The utility model technical problem to be solved provides a kind of various electronic current mutual inductor of getting the ability mode; It can guarantee the reliable output of DC power supply; And be under zero the situation, can provide enough voltage to export the work of keeping sensing head at bus current.

To achieve these goals, the utility model adopts following technical scheme:

A kind of various electronic current mutual inductor of getting the ability mode; Comprise sensing head, base terminal box, be connected sensing head, the sleeve pipe between the base terminal box, the signal merge cells that is connected through optical fiber with the base terminal box; Be provided with collector in the said sensing head, link to each other with collector and for collector faradic measurement coil is provided, for collector provides the energy supply coil and the storage battery of energy, be penetrated with between said measurement coil and the energy supply coil and transmit the primary conductive bar that bus links to each other.

Compared with prior art; The utility model is various get can mode electronic current mutual inductor have the following advantages at least: the utility model provide a kind of various get can mode electronic current mutual inductor be under zero the situation at busbar voltage shakiness or voltage; The energy supply coil lost efficacy; Said storage battery stable supplying collector signal guarantees the stable output of product signal.

Description of drawings

Fig. 1 is the various overall structure sketch map of getting the electronic current mutual inductor of ability mode of the utility model;

Fig. 2 is various another structural representation of getting the electronic current mutual inductor of ability mode of the utility model;

Fig. 3 is the partial enlarged drawing of Fig. 2.

Embodiment

Below in conjunction with accompanying drawing the utility model is done and to be described in further detail.

See also shown in Figure 1, the utility model is various get can mode electronic current mutual inductor comprise sensing head 10, sleeve pipe 5, base 6 and signal merge cells 9.

See also Fig. 2 and shown in Figure 3, said sensing head 10 set inside have collector 1, are placed on electronic current mutual inductor sensing head 10 tops; Be connected with storage battery 2 with collector 1, measure coil 3 and function coil 4.Product primary conductive bar 8 passes measures coil 3 and energy supply coil 4, and said primary conductive bar 8 links to each other with the transmission bus, after the energising; The measured coil 3 of electric current that the transmission bus produces is sensed; Like this, the induced current that measurement coil 3 is sensed is gathered by collector 1, finally directly is transferred to the secondary singal merge cells through optical fiber; The secondary singal merge cells is transferred to the power station computer, as transmission route survey and guaranteeing; Said energy supply coil 4 is for collector provides energy, and storage battery 2 is as subsequent use energy-provision way, is under zero the situation at busbar voltage shakiness or voltage; Stable supplying collector 1 signal guarantees the stable output of product signal, on the data acquisition unit 1 of product sensing head 10 inside, has increased a supply line; Storage battery is connected with collector 1; In the module of collector, program is write again, when energy supply coil 4 lost efficacy, 2 energy supplies of driven by program storage battery.The signal of collector collection directly is transferred to the secondary singal merge cells through optical fiber, and the secondary singal merge cells is transferred to the power station computer, as transmission route survey and guaranteeing.

The described signal merge cells of the utility model in fact is a signal receiver, is used to receive the signal that collector collects.

The above is merely a kind of execution mode of the utility model; It or not whole or unique execution mode; The conversion of any equivalence that those of ordinary skills take the utility model technical scheme through reading the utility model specification, the claim that is the utility model contains.

Claims

One kind various get can mode electronic current mutual inductor; It is characterized in that: comprise sensing head (10), base (6), be connected sensing head (10), the sleeve pipe (5) between the base (6); And the signal merge cells (9) that is connected through optical fiber with base (6); Be provided with collector (1) in the said sensing head (10), link to each other with collector (1) and for collector faradic measurement coil (3) is provided, for collector provides the energy supply coil (4) and the storage battery (2) of energy, be penetrated with between said measurement coil (3) and the energy supply coil (4) and transmit the primary conductive bar (8) that bus links to each other.