CN202008894U - Cross magnetization single-phase controllable reactor - Google Patents

Abstract

An orthogonally magnetized single-phase controllable reactor, comprising a main core leg (1), a first side yoke (11), a second side yoke (12), a first side leg (3), a second side leg (4) The working iron core formed, and the working winding (2), the first control iron core (5), the second control iron core (6), the first control winding (7) and the second control winding (8). The main core column (1) is a single column with equal cross-section, and is formed by stacking a plurality of core cakes with gaps. The working winding (2) is sleeved on the main core column (1); the first control core (5) and the second control core (6) are orthogonal to the first side column (3) and the second side column (4) respectively . The first control winding (7) and the second control winding (8) are sleeved on the first control side post (51) and the second control side post (61) respectively. The first side column (3) and the second side column (4) are symmetrically arranged left and right with respect to the main iron core column (1); The control core can also be installed on the side yoke. The utility model can be used in high-voltage grade systems.

Description

A single-phase controllable reactor with orthogonal magnetization

technical field

The utility model relates to a reactor, in particular to a controllable reactor used in a power system.

Background technique

At present, the controllable reactor with adjustable magnetic bias can be divided into two types from the structure of the core: the magnetic valve type and the core column saturation type controllable reactor. Chinese patent 95223137.9 proposes a magnetic valve type controllable reactor, which changes the reactance of the winding by controlling the magnetic saturation state of the small cross-section section provided on the main core column, so as to achieve the purpose of changing the reactance value of the reactor. Its structural features are: the iron core is composed of two main iron core columns and corresponding iron yokes, and a small section section is provided on the two main iron core columns; each iron core column has a winding divided into upper and lower parts. The number of turns between the winding sub-joints connected to both ends of the thyristor is 5% of the total number of turns of each column winding, of which the working winding and the control winding belong to one winding. The control winding also plays the role of extracting the excitation energy required by the DC bias. Its disadvantages are that, since the two main core columns are provided with small sections, the structure is complex, the manufacturability is poor, and the cost is high. Chinese patent 992503442 proposes a core column magnetic saturation controllable reactor with a similar structure, which is characterized in that the core column is of equal cross-section, and its cross-sectional area is smaller than the cross-sectional area of the iron yoke; an independent working winding is sleeved on the outside of the control winding, and the structure Suitable for high voltage level power system. The working windings and control windings of the two controllable reactors mentioned above are set on the same iron core column, which affect each other, the cost is high, the harmonic characteristics are poor, and the power quality of the grid is greatly affected.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and propose a single-phase reactor with a single main core column structure based on the principle of orthogonal magnetization.

The utility model flexibly changes the magnitude of the reluctance of the magnetic circuit through the energy of the external power supply, and realizes controllable reactance value and capacity. The reactor of the utility model has simple structure, the control core can be installed on the side column or the side yoke, the installation position is flexible, the manufacturability is good, and the air gap of the DC bias magnetic circuit is small, and the bias magnetic loss is small. At the same time, due to the principle of orthogonal magnetization, the working magnetic flux and the control magnetic flux form their own loops and do not affect each other, so that the reactor has good harmonic characteristics. The utility model can be used in high-voltage grade systems.

The utility model includes a working iron core composed of a main iron core column, a first side yoke, a second side yoke, a first side column and a second side column, and a working winding, and is characterized in that the reactor also includes a first The control core, the second control core, the first control winding and the second control winding; the main core column is of equal cross-section and formed by stacking multiple core cakes with gaps; the main core column is a single column, the working winding is sleeved on the main core column; the first control core and the second control core are orthogonal to the first side column and the second side column; the first control winding and the second control winding are respectively sleeved on the first control On the first control side post and the second control side post of the iron core and the second control iron core; the first side post and the second side post are equal-section iron cores without gaps, the first side post and the second side post The left and right symmetrical arrangements are made with respect to the main iron core column; the first side yoke and the second side yoke are equal-section iron cores without gaps, and are arranged vertically symmetrically with respect to the main iron core column.

The main core column of the working iron core is a single column. The side column, the side yoke and the main core column constitute the working iron core of the horizontal "day"-shaped structure. Similar to the working core, the control core is also composed of side columns, side yokes, and main core columns, except that the middle section of the main core column of the control core is an air gap, and the number of control cores is two. The air gap section of the main core column of the control core is arranged orthogonally to the side column of the working core, and the control winding is sleeved on the side column of the control core; the two control windings on the same control core have the same number of turns and the same winding direction, and are respectively placed Set on the two control side columns of the control core, the two sets of control windings are connected to the external DC power supply in parallel. The excitation flux generated by the DC power supply is orthogonal to the working flux at the intersection of the side columns of the control core and the working core. Changing the magnitude of the DC current can change the saturation degree of the control core, and then change the saturation degree of the side column of the working core orthogonal to the control core, thereby changing the reluctance of the side column of the working magnetic circuit, and achieving the purpose of controlling the reactance value and capacity . When the control winding is sleeved on the control side yoke of the control core, changing the magnitude of the DC current can also change the saturation degree of the control core to achieve the purpose of control.

The control core can also be arranged orthogonally to the side yoke of the working core. At this time, controlling the magnitude of the current can change the reluctance of the side yoke of the working magnetic circuit.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is the A-A sectional view of the utility model embodiment structure;

Fig. 3 is a structural schematic diagram of the control core of the present invention;

Fig. 4 is a schematic diagram of the left control iron core, winding wires and wiring of the embodiment shown in Figs. 1 and 2;

Fig. 5 is a structural schematic diagram of another embodiment of the invention.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural view of an embodiment of the utility model. The utility model includes a working iron core composed of a main iron core column 1, side columns 3, 4, side yokes 11, 12, a working winding, two control iron cores and two sets of control windings corresponding to the two control iron cores. As shown in Figure 1, the main core column 1, the first side column 3, the second side column 4, the first side yoke 11, and the second side yoke 12 together constitute the working iron core of the horizontal "day"-shaped structure. The main core column 1 is a single column with equal cross-section, and is formed by stacking multiple core cakes with gaps. The first side column 3 and the second side column 4 are iron cores of equal cross-section, without gaps, and are arranged symmetrically about the main core column 1; the first side yoke 11 and the second side yoke 12 are iron cores of equal cross-section, without gaps, about The main core columns 1 are symmetrically arranged up and down. The working winding 2 is sleeved on the main core column 1 of the working core. The first control core 5 and the second control core 6 are respectively perpendicular to the first side column 3 and the second side column 4 of the working core, and the first control winding 7 and the second control winding 8 are respectively sleeved on the first control core 5 , On the second control iron core 6. Adjusting the current of the first control winding 7 and the second control winding 8 can change the saturation of the orthogonal part of the first side column 3, the second side column 4 and the first control core 5 and the second control core 6 of the working core. Degree, and then change the reluctance of the working magnetic circuit to achieve the purpose of controlling the reactance value and capacity.

Fig. 2 is a structure A-A sectional view of the embodiment of the utility model. As shown in FIG. 2 , the orthogonal sections 9 and 10 are the orthogonal sections of the first control core 5 , the second control core 6 and the first side column 3 and the second side column 4 of the working core shown in FIG. 1 . According to the specific shape and size of the main core column 1, the cross-section can be circular, oval, progressively circular, progressively oval, rectangular, trapezoidal, drum-shaped, and sand-shaped; in addition, the working winding 2 can be any shape such as circular coil, rectangular coil, oval coil, etc. The first control side post 51 and the second control side post 61 are respectively the side posts of the first control iron core 5 and the second control iron core 6; the first control side yoke 52 and the second control side yoke 62 are respectively the first control iron core 5 , the side yoke of the second control core 6 ; the windings 71 and 72 together form the first control winding 7 ; the windings 81 and 82 together form the second control winding 8 .

Fig. 3 is a structural schematic diagram of the control core of the present invention. As shown in FIG. 3 , the main core column 14 of the control core, the air gap 15 , the first control side column 51 , and the first control side yoke 52 together form a horizontal control core with a "day"-shaped structure.

Fig. 4 is a schematic diagram of the control core, winding and wiring of the embodiment shown in Figs. 1 and 2; , The direction line 13 is the flow direction of the DC bias magnetic flux generated by the windings 71 and 72 when the wiring is performed according to the method shown in the figure. The orthogonal section 9 is the orthogonal part of the first control core 5 and the first side column 3 of the working core. The working magnetic flux is perpendicular to the orthogonal section 9 , and the DC bias magnetic flux is parallel to the orthogonal section 9 .

Fig. 5 is a structural schematic diagram of another embodiment of the present invention; as shown in Fig. 5 , the working winding 2 is sleeved on the iron core column 1 of the working iron core. The first control core 5 and the second control core 6 are respectively perpendicular to the left and right ends of the second side yoke 12 of the working core. The first control core 5 and the second control core 6 can also be sleeved on the first The left and right ends of the side yoke 11 ; the first control winding 7 and the second control winding 8 are sleeved on the first control core 5 and the second control core 6 respectively. Adjusting the current of the first control winding 7 and the second control winding 8 changes the saturation degree of the second side yoke 12 of the working iron core orthogonal to the first control iron core 5 and the second control iron core 6, thereby changing the reluctance of the working magnetic circuit , to achieve the purpose of controlling the reactance value and capacity.

Claims (5)

1. the single-phase controlled reactor of a cross magnetization, comprise the work iron core that constitutes by main core post (1), first return yoke (11), second return yoke (12), the first other post (3), the second other post (4), and work winding (2), it is characterized in that: described reactor also comprises first control (5) unshakable in one's determination, second control (6) unshakable in one's determination, the first control winding (7) and the second control winding (8); Described main core post (1) is a uiform section, and is formed by the cake stack a plurality of unshakable in one's determination of band gap; Described main core post (1) is a single-column, and work winding (2) is set on the main core post (1); First control (5) unshakable in one's determination, second control (6) unshakable in one's determination and the first other post (3), second other post (4) quadrature; The first control winding (7), the second control winding (8) are set in respectively on the other post (51) of first control and the second other post of control (61) of first control (5) unshakable in one's determination, second control (6) unshakable in one's determination; The described first other post (3) and the second other post (4) they be the uiform section iron core, band gap not, and the post (3) and the second other post (4) are symmetrically arranged about main core post (1) by first; Described first return yoke (11) and second return yoke (12) are the uiform section iron core, and band gap not is about main core post (1) symmetric arrangement up and down.

2. the single-phase controlled reactor of cross magnetization according to claim 1, it is characterized in that, described first control unshakable in one's determination (5), second control (6) unshakable in one's determination or with two ends, the left and right sides quadrature of first return yoke (11), or with two ends, the left and right sides quadrature of the second return yoke yoke (12).

3. the single-phase controlled reactor of cross magnetization according to claim 1 is characterized in that, the described first control winding (7), second is controlled winding (8) or is set in respectively on the control control return yoke (52,62) unshakable in one's determination.

4. the single-phase controlled reactor of cross magnetization according to claim 1 is characterized in that: two groups of windings (71, the 72) number of turn that is set in described first control (5) unshakable in one's determination is identical, around to identical; Described two groups of windings (71,72) parallel connection is connected to external direct current power supply through resistance; Two groups of windings (81, the 82) number of turn that is set in described second control unshakable in one's determination (6) is identical, and around to identical, described two groups of windings (81,82) parallel connection is connected to external direct current power supply through resistance.

5. the single-phase controlled reactor of cross magnetization according to claim 1, it is characterized in that: described control main core post (14) unshakable in one's determination, air gap (15), the other post (51) of first control, the second control return yoke (52) is formed the control iron core of horizontally-arranged " day " font structure.

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