CN202110913U - Star frame structure dry type air core reactor - Google Patents

Abstract

The utility model relates to a three-phase star frame structure dry type air core reactor which is convenient in connection and stable in operation and overcomes the defect that in the prior art connection lines of an in-line terminal and a front end switch are connected in an intersected mode so that connection is difficult and stability of equipment is influenced. The three-phase star frame structure dry type air core reactor comprises A, B, C three phase coils and insulators connected in between. The coil of each phase coil of the three phase coils is provided with an upper star frame and a lower star frame, each phase is provided with an in line and an out line, all the in lines and the out lines are vertically distributed, support insulators are fixed at the ends of star frame arms arranged on two sides of the in lines of the B phase in the middle, leading lines corresponding to the A phase and the C phase are respectively connected with the in line of the A phase and the in line of the C phase through the support insulators which respectively correspond to the in line of the A phase on the upper side and the in line of the C phase on the lower side, and the connection with the reactor is divided from the middle to the two sides, so that connection lines are not intersected, connection is easy and the three-phase star frame structure dry type air core reactor is suitable for conditions of large current and large induction.

Description

Star frame structure dry type air core reactor

technical field

The utility model relates to a reactor structure, in particular to a dry-type air-core reactor with a three-phase star frame structure with convenient connection and stable operation.

Background technique

The wiring of the reactor is divided into two ways: series connection and parallel connection. Series reactors usually play the role of current limiting, and shunt reactors are often used for reactive power compensation. As a means of reactive power compensation, reactors are widely used in power transmission and transformation systems. These devices are connected to the grid by adding switches in the middle. The coils of each phase of the reactor are fixed by the upper and lower star frames, and there are incoming and outgoing wire terminals on the star frames. For three-phase stacked air-core reactors, the three-phase terminals are arranged in a vertical shape. However, The three-phase terminals of the front switch connected to it are arranged horizontally, and the two are connected in a cross shape. This structure not only makes the connection difficult, but also is not suitable for the situation of large current and large inductance. There is a height difference between the highest phase and the lowest phase of the air-core reactor, which makes the connecting conductor connected between the air-core reactor and the front switch bear additional stress, which in turn causes the connecting conductor to deform during the operation of the equipment, seriously affecting the stability of the equipment run.

The Chinese Patent Office announced a patent CN201765899U on March 16, 2011, which is called a new dry-type air-core reactor, including an upper star frame, a lower star frame, and an envelope. The envelope is located between the upper star frame and the lower star frame. In between, a glass fiber reinforced plastic protective layer is arranged on the outside of the package, and multiple sets of drawing strips are arranged between the glass fiber reinforced plastic protective layer and the package, and a through hole is formed between each adjacent two groups of drawing bars.

Contents of the invention

The utility model solves the shortcoming that the connecting lines of the incoming line terminals and the front-end switches are cross-connected in the prior art, which causes difficult connection and affects the operation stability of the equipment. A dry-type air-core reactor with a star frame structure that will not cross and can improve the stability of equipment operation.

The technical scheme adopted by the utility model to solve the technical problem is: a dry-type air-core reactor with a star frame structure, including ABC three-phase coils and insulators connected between phases, and each phase coil in the three-phase coils has an upper star frame And the lower star frame, the upper star frame and the lower star frame are fixed by cross star frame arms, each phase is equipped with incoming and outgoing lines, all incoming lines and all outgoing lines are arranged vertically, in the middle of phase B The incoming line of the middle phase B corresponds to the front switch, and the ends of the star frame arms on both sides of the incoming line of the middle B phase are fixed with support insulators. The lead wire of the switch is directly connected to phase B, and the lead wires corresponding to phase A and phase C are respectively connected to the incoming line of phase A and the incoming line of phase C through supporting insulators. The wiring row coming out of the front switch is located in the same horizontal plane in the horizontal direction. This horizontal plane is at the same height as the incoming line of phase B in the middle. Supporting insulators are arranged on both sides of the incoming line of phase B, and the supporting insulator corresponds to the incoming line of phase A on the upper side. And the incoming line of phase C on the lower side, and also correspond to the terminal block of the front switch, the terminal block of the front switch is connected to the B phase, the wiring in the middle is connected to the incoming line of the B phase, and the wiring on both sides is respectively connected to the On the supporting insulator B, the supporting insulator becomes the transition between the A phase and the C phase incoming line. These three wirings do not need to cross, and the connection is simple. It is suitable for the situation of large current and large inductance. The connecting conductor between the reactor and the front switch is just No need to bear additional stress, making the equipment run more stably.

Preferably, the star arm where the supporting insulator is located is on the same plane as the incoming line of phase B, and the star arm is symmetrical to the star arm where the incoming line of phase B is located and spaced 30°-90° apart from each other. The same plane is guaranteed to be at the same height as the three-phase terminal of the front switch. The star frame arms are separated from each other, and the angle of separation should be appropriate. The total range is within the range of 180° towards the front switch. Considering the convenience of wiring connection, the star frame The interval angle between the arms is generally controlled at 30°-60°. If the star frame arms are too close, it is easy to cause the wiring to be too close, which will affect the incoming line connection between phase A and phase C.

Preferably, a support aluminum plate is fixed at the end of the star frame arm connected to the support insulator, the support aluminum plate is provided with connection holes, and the support insulator is fixed to the support aluminum plate. The supporting aluminum plate is perpendicular to the star frame arm. The supporting aluminum plate and the star frame arm are fixed by welding. The connecting holes of the supporting aluminum plate are mainly used to connect and fix the supporting insulator. There is a safe distance between the supporting aluminum plate and the B-phase coil.

Preferably, one end of the supporting insulator has two mounting holes, the other end has a mounting hole, and the middle is an insulating porcelain bottle. One end of the two mounting holes is connected and fixed to the supporting aluminum plate at the end of the star frame arm, and one end of the mounting hole is connected to the front section switch for wire connection. The two installation holes correspond to the connection holes of the supporting aluminum plate, the two installation holes are on the same diameter line, and one installation hole corresponds to the incoming wires of phase A and phase C.

Preferably, the supporting insulator on one side of the incoming line of phase B is in the same vertical plane as the incoming line of phase A, and the supporting insulator on the other side is in the same vertical plane as the incoming line of phase C. This corresponding method makes the incoming line layout more reasonable, and the wiring from the front switch is directly connected to the incoming line of phase B and the supporting insulator, which saves the intermediate transition bracket and reduces the cost.

Preferably, the outgoing lines of each phase are on the same vertical plane.

Preferably, the incoming line of each phase is at the end of the upper star frame of the phase, and the outgoing line is at the end of the lower star frame of the phase.

The beneficial effect of the utility model is that support insulators are arranged on both sides of the incoming line of the middle B phase, and the supporting insulators correspond to the incoming line of the A phase on the upper side and the incoming line of the C phase on the lower side respectively, so that the reactor The connection with the front switch is in a horizontal state. It is connected to the reactor and then divided from the middle to the upper and lower sides. The wiring will not cross, and the connection is relatively simple. It is suitable for the situation of large current and large inductance. the

Description of drawings

Fig. 1 is a kind of structural representation of the utility model;

Figure 2 is a top view of the utility model;

Fig. 3 is a structural schematic diagram of a supporting aluminum plate of the present invention;

In the figure: 1. Upper star frame arm, 2. Lower star frame arm, 3. Incoming line, 4. Interphase insulator, 5. Post insulator, 6. Support base, 7. Fixed channel steel, 8. Appearance, 9. Support Aluminum plate, 10, support insulator, 11, connecting hole.

Detailed ways

The technical solutions of the present utility model will be further specifically described below through specific embodiments and in conjunction with the accompanying drawings.

Embodiment: A dry-type air-core reactor with a star frame structure (see accompanying drawing 1 and accompanying drawing 2), a frustum-shaped supporting base 6 is fixed on the fixed channel steel 7, a post insulator 5 is fixed on the supporting base, and a post insulator is fixed on the post insulator There are three-phase stacked coils, which are A phase, B phase and C phase from top to bottom. The phases are connected and fixed by the interphase insulator 4. Each phase has an upper star frame and a lower star frame. The star frame arm 1 is cross-fixed, and the lower star frame is formed by cross-fixing the lower star frame arm 2. In the upper star frame of each phase, there is an incoming line 3 at the end of the upper star frame arm. Each phase In the lower star frame, the end of the lower star frame arm is provided with an outgoing line 8, and the ends of the upper star frame arms on both sides of the upper star frame arm where the B-phase incoming line in the middle is located are welded and fixed with square supporting aluminum plates 9 (see Figure 3), the supporting aluminum plate is perpendicular to the upper star frame arm, and there are two vertical connecting holes 11 on the supporting aluminum plate, and the supporting aluminum plate is connected and fixed with supporting insulators 10 through the connecting holes, and the two supporting insulators are connected to the middle upper The angle between the star frame arms is 60°, one end of the supporting insulator has two connecting holes corresponding to the connecting holes on the supporting aluminum plate, the other end of the supporting insulator has a connecting hole, the middle is an insulating porcelain bottle, and the two sides of phase B The supporting insulators of phase A and phase C respectively correspond to the incoming lines of phase A and the corresponding supporting insulators. The incoming lines of phase A and the corresponding supporting insulators are in the same vertical plane, and the incoming lines of phase C and the corresponding supporting insulators are in the same vertical plane. , the outgoing lines of each phase are on the same vertical plane.

The wiring of the front-end switch is at the same level as the upper star frame of phase B. The wiring of the front-end switch corresponds to the incoming line of phase B and the supporting insulators on both sides. The lead wire of the front-end switch is directly connected to phase B, corresponding to phase A and phase C. The lead wires are respectively connected to the incoming wire of phase A and the incoming wire of phase C through supporting insulators.

The above-described embodiment is only a preferred solution of the utility model, and does not limit the utility model in any form. There are other variations and modifications under the premise of not exceeding the technical solution described in the claims. .

Claims (7)

1. A star frame structure dry-type air-core reactor, including ABC three-phase coils and insulators connected between phases, each phase coil in the three-phase coils has an upper star frame and a lower star frame, and an upper star frame and a lower star frame It is formed by crossing and fixing star frame arms. It is characterized in that each phase is equipped with incoming and outgoing lines. All incoming lines and all outgoing lines are arranged vertically. The incoming line in the middle B phase corresponds to the front switch, and the middle B phase The ends of the star frame arms on both sides of the incoming line of the phase are fixed with supporting insulators. The supporting insulators on both sides correspond to the incoming line of phase A on the upper side and the incoming line of phase C on the lower side respectively. The leads of the front-end switch are directly connected to phase B. Lead wires corresponding to phase A and phase C are respectively connected to the incoming wire of phase A and the incoming wire of phase C through the support insulator. 2. The dry-type air-core reactor with star frame structure according to claim 1, characterized in that the star frame arm where the supporting insulator is located is on the same plane as the incoming line of phase B, and the star frame arm is located opposite to the incoming line of phase B The star frame arms are symmetrical and spaced 30°-90° apart from each other. 3. The star frame structure dry-type air-core reactor according to claim 1, characterized in that the end of the star frame arm connected to the supporting insulator is fixed with a supporting aluminum plate, the supporting aluminum plate is provided with a connecting hole, and the supporting insulator is fixed to the supporting aluminum plate superior. 4. The dry-type air-core reactor with star frame structure according to claim 1, 2 or 3, characterized in that one end of the supporting insulator has two installation holes, the other end has one installation hole, the middle is an insulating porcelain bottle, and the two installation holes One end is connected and fixed with the supporting aluminum plate at the end of the star frame arm, and one end of a mounting hole is wired with the front switch. 5. The dry-type air-core reactor with star frame structure according to claim 1, 2 or 3, characterized in that the supporting insulator on one side of the incoming line of phase B is in the same vertical plane as the incoming line of phase A, and the supporting insulator on the other side The insulator is on the same vertical plane as the incoming line of phase C. 6. The dry-type air-core reactor with star frame structure according to claim 1, 2 or 3, characterized in that the outgoing lines of each phase are on the same vertical plane. 7. The dry-type air-core reactor with star frame structure according to claim 1, 2 or 3, characterized in that the incoming line of each phase is at the end of the upper star frame of the phase, and the outgoing line is at the lower star frame of the phase the end of.

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