CN201966866U

CN201966866U - Split-phase single-chocking type three-phase MCR (magnetic control reactor)

Info

Publication number: CN201966866U
Application number: CN2011200967276U
Authority: CN
Inventors: 徐静华; 喻德来
Original assignee: Hangzhou Yinhu Electric Equipment Co Ltd
Current assignee: Hangzhou Yinhu Electric Equipment Co Ltd
Priority date: 2011-04-06
Filing date: 2011-04-06
Publication date: 2011-09-07
Anticipated expiration: 2021-04-06

Abstract

The utility model relates to a split-phase single-chocking type three-phase MCR (magnetic control reactor), which uses fewer thyristors, and solves the defects that in three-phase MCR of the prior art, each phase is provided with two thyristors, so that the cost is higher, and the line is more complex. In the utility model, the coil winding of each phase is provided with only one thyristor, the iron core limb of each phase is provided with only one thyristor, in this way, the iron core limbs of the three phases are provided with only three thryristors, compared with the traditional connecting mode, three thryristors can be saved, simultaneously, the radiator, the pulse transformer and the trigger loop which are matched with the three-phase MCR can be omitted, so that the cost is reduced, the line connection can be simplified, and simultaneously, the fault coefficient can be reduced.

Description

Type three-phase magnet controlled reactor is singly gripped in phase-splitting

Technical field

The utility model relates to a kind of three-phase magnet controlled reactor structure, especially a kind ofly uses the phase-splitting of less thyristor singly to grip type three-phase magnet controlled reactor.

Background technology

The magnet controlled reactor that is applied to regulate in the power network inductance current at present divides two kinds: i.e. the magnet controlled reactor of the magnet controlled reactor of outer DC excitation and interior DC excitation.

The magnet controlled reactor of outer DC excitation be on the iron core of reactor except the AC power frequency main winding, again around last additional direct current excitation winding, two ends at this DC excitation winding apply direct voltage, feed direct current, to DC excitation unshakable in one's determination, control its degree of saturation unshakable in one's determination, change the inductance of reactor, thus the inductance current of control main winding.This magnet controlled reactor is because many additional direct current excitation winding, and needs the no small outer DC control supply of power, so substituted by the magnet controlled reactor of interior DC excitation gradually.

The magnet controlled reactor of interior DC excitation does not need additional direct-flow magnet exciting coil, do not need the outer DC control supply of adding yet, be to apply the part power-frequency voltage that exchanges main winding at the thyristor two ends, controlled rectification principle by thyristor and rectifying tube produces direct voltage, in AC Windings, flow through direct current, regulate its degree of saturation unshakable in one's determination, thus the interchange inductance current of control main winding.This form is advanced at present magnet controlled reactor, and it is widely used in industries such as colliery, metallurgy, wind power generation.

But the magnet controlled reactor of DC excitation in existing, whenever, need two thyristors to produce direct current mutually, control the degree of saturation of positive and negative two iron cores, thereby the inductance current of the positive and negative half-wave of control main winding, therefore the three-phase magnet controlled reactor needs six thyristors, and each thyristor needs corresponding radiator, pulse transformer and triggering loop matching running, and the overall volume of reactor is bigger, cost is also than higher, and the corollary equipment of thyristor causes the circuit structure more complicated.

Patent Office of the People's Republic of China has announced a CN20197131Y patent on February 18th, 2009, name is called a kind of magnetic control type paralleling reactor field excitation system.Comprise that one is connected in parallel on reactor excitation system dc bus the two poles of the earth by thyristor valve, and the controllable afterflow branch road that constitutes, the negative electrode of described thyristor valve connects the positive pole of described dc bus, anode connects the negative pole of described dc bus, when rectifier is in normal operating conditions, the DC excitation electric current constitutes the loop by rectifier and field excitation branch line, the not conducting of thyristor valve of controllable afterflow branch road, when transmission line generation open-phase operation or three-phase tripping operation, control circuit locking rectifier trigger pulse, trigger the thyristor valve of controllable afterflow branch road simultaneously, the conducting of controllable afterflow branch road, the DC excitation electric current is transferred to the controllable afterflow branch road from rectifier and constitutes the loop, and the rectifier thyristor valve all turn-offs simultaneously.

Summary of the invention

The utility model has solved that each two thyristor that match causes cost higher in the three-phase magnet controlled reactor of the prior art, and the shortcoming that circuit is complicated provides a kind of circuit simple, and type three-phase magnet controlled reactor is singly gripped in the phase-splitting of each thyristor that matches.

The technical scheme that its technical problem that solves the utility model adopts is: type three-phase magnet controlled reactor is singly gripped in a kind of phase-splitting, comprise the iron core column of forming three-phase and the coil windings of iron core column outside, it is characterized in that only being provided with a thyristor on the coil windings of each phase.Have only three thyristors like this on the tri-phase iron core post, reduced by three thyristors than traditional connected mode, corresponding supporting radiator, pulse transformer and triggering loop have also been reduced simultaneously, reduced cost, also simplify the circuit connection, also reduced the fault coefficient simultaneously, improved the reliability of reactor, also can dwindle the volume of reactor after circuit is simplified, save the man-hour of connection.

As preferably, the iron core column of each phase is two, is respectively left iron core post and right iron core rod, and each root iron core column is provided with two coil windings, is respectively upper left coil windings, lower-left coil windings, upper right coil windings and bottom right coil windings.

As preferably, the upper end of upper left coil windings and upper right coil windings is connected jointly, and the lower end of upper left coil windings and upper right coil windings is connected to a diode of going up the coil windings conducting from upper left coil windings to the right.Two iron core column of each phase cooperate the degree of saturation of controlling positive and negative iron core by thyristor and diode, thus the inductance current of the positive and negative half-wave of control coil winding.

As preferably, the lower end of upper left coil windings connects the upper end of bottom right coil windings, and the lower end of upper right coil windings connects the upper end of lower-left coil windings, and the lower end of lower-left coil windings links to each other with the lower end of bottom right coil windings.

A kind of scheme: thyristor connects upper left coil windings and lower-left coil windings, and the positive pole of thyristor connects the tap of upper left coil windings, and the negative pole of thyristor connects the tap of lower-left coil windings.

Another kind of scheme: thyristor connects upper left coil windings and lower-left coil windings, and the positive pole of thyristor connects the tap of upper left coil windings, and the negative pole of thyristor connects the upper end of lower-left coil windings.

The beneficial effects of the utility model are: a thyristor only is set on each phase iron core column, have only three thyristors like this on the tri-phase iron core post, reduced by three thyristors than traditional connected mode, corresponding supporting radiator, pulse transformer and triggering loop have also been reduced simultaneously, reduced cost, also simplify the circuit connection, also reduced the fault coefficient simultaneously.

Description of drawings

Fig. 1 is a kind of schematic diagram of the utility model, only represents a phase among the figure;

Fig. 2 is the another kind of schematic diagram of the utility model, only represents a phase among the figure;

Among the figure: 1, upper left coil windings, 2, the left iron core post, 3, the lower-left coil windings, 4, the bottom right coil windings, 5, upper right coil windings, 6, right iron core rod.

Embodiment

Below by specific embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.

Embodiment 1: type three-phase magnet controlled reactor is singly gripped in a kind of phase-splitting, total three-phase, the iron core column outside of each phase is wound with coil windings (referring to accompanying drawing 1), the iron core column of each phase is two, be respectively left iron core post 2 and right iron core rod 6, each root iron core column is provided with two coil windings, be respectively upper left coil windings 1, lower-left coil windings 3, upper right coil windings 5 and bottom right coil windings 4, the upper end of upper left coil windings and upper right coil windings is connected jointly, the lower end of upper left coil windings and upper right coil windings is connected to a diode of going up the coil windings conducting from upper left coil windings to the right, the lower end of upper left coil windings connects the upper end of bottom right coil windings, the lower end of upper right coil windings connects the upper end of lower-left coil windings, the lower end of lower-left coil windings links to each other with the lower end of bottom right coil windings, only be provided with a thyristor on the coil windings of each phase, connect upper left coil windings and lower-left coil windings, the positive pole of thyristor connects the tap of upper left coil windings, and the negative pole of thyristor connects the tap of lower-left coil windings.

Embodiment 2: type three-phase magnet controlled reactor is singly gripped in a kind of phase-splitting, the coil windings (referring to accompanying drawing 2) that comprises tri-phase iron core post and iron core column outside, thyristor connects upper left coil windings and lower-left coil windings, the positive pole of thyristor connects the tap of upper left coil windings, and the negative pole of thyristor connects the upper end of lower-left coil windings.All the other structures are with reference to embodiment 1.

Above-described embodiment is a kind of preferred version of the present utility model, is not the utility model is done any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technical scheme that claim puts down in writing.

Claims

1. type three-phase magnet controlled reactor is singly gripped in a phase-splitting, it is characterized in that reactor comprises the iron core column of forming three-phase and the coil windings of iron core column outside, only is provided with a thyristor on the coil windings of each phase.

2. type three-phase magnet controlled reactor is singly gripped in phase-splitting according to claim 1, the iron core column that it is characterized in that each phase is two, be respectively left iron core post and right iron core rod, each root iron core column is provided with two coil windings, is respectively upper left coil windings, lower-left coil windings, upper right coil windings and bottom right coil windings.

3. type three-phase magnet controlled reactor is singly gripped in phase-splitting according to claim 2, the upper end that it is characterized in that upper left coil windings and upper right coil windings is connected jointly, and the lower end of upper left coil windings and upper right coil windings is connected to a diode of going up the coil windings conducting from upper left coil windings to the right.

4. type three-phase magnet controlled reactor is singly gripped in phase-splitting according to claim 2, it is characterized in that the lower end of upper left coil windings connects the upper end of bottom right coil windings, the lower end of upper right coil windings connects the upper end of lower-left coil windings, and the lower end of lower-left coil windings links to each other with the lower end of bottom right coil windings.

5. singly grip type three-phase magnet controlled reactor according to claim 1 or 2 or 3 or 4 described phase-splittings, it is characterized in that thyristor connects upper left coil windings and lower-left coil windings, the positive pole of thyristor connects the tap of upper left coil windings, and the negative pole of thyristor connects the tap of lower-left coil windings.

6. singly grip type three-phase magnet controlled reactor according to claim 1 or 2 or 3 or 4 described phase-splittings, it is characterized in that thyristor connects upper left coil windings and lower-left coil windings, the positive pole of thyristor connects the tap of upper left coil windings, and the negative pole of thyristor connects the upper end of lower-left coil windings.