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A dual-axis excitation condenser and its excitation winding structure

A technology of excitation winding and biaxial excitation, which is applied in the shape/style/structure of winding conductors, synchronous motors for single-phase current, AC network voltage adjustment, etc., and can solve the range and phase advance ability that limit the operation stability Poor, limited reactive power and other issues, to achieve the effect of improving the deep phase advance operation capability and reducing the harmonic content

Active Publication Date: 2021-05-11
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional synchronous condenser has only one set of excitation windings, which are placed on the d-axis of the rotor. This feature determines that its power regulation and operation stability are related to the angle between the magnetic potential of the longitudinal axis of the condenser and the grid voltage, that is, the The condenser is related to the power angle, which limits the range of operational stability
At the same time, because the excitation current of the rotor of the traditional synchronous condenser can only be on the d-axis of the rotor, its maximum phase advance capability is limited by the working condition of the rotor excitation current. The traditional synchronous condenser has poor phase advance ability and is prone to instability during phase advance operation. , need to limit the reactive power it absorbs

Method used

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  • A dual-axis excitation condenser and its excitation winding structure
  • A dual-axis excitation condenser and its excitation winding structure
  • A dual-axis excitation condenser and its excitation winding structure

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Experimental program
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Effect test

Embodiment 1

[0051] Such as figure 1 As shown, the excitation winding structure of a dual-axis excitation condenser provided by the present invention, the dual-axis excitation condenser is a 300Mvar dual-axis excitation condenser, which is slotted and placed at the large tooth position of the hidden pole condenser rotor The excitation winding is used as the q-axis excitation winding, and the axis of the q-axis excitation winding is perpendicular to the axis of the d-axis excitation winding; the number of slots at the position of the large teeth is Z q There are 6 slots and 36 d-axis excitation winding slots.

[0052] When the dual-axis excitation condenser only excites the d-axis alone, the d-axis excitation winding is fed with DC current, and the q-axis excitation winding is short-circuited. The measured basic air-gap magnetic flux density is 0.86T, 3 times, 5 times, 7 The harmonic contents of the 1st and 9th are 0.026T, 0.040T, 0.088T, and 0.050T, respectively. The total harmonic disto...

Embodiment 2

[0056] Such as figure 2 As shown, the excitation winding structure of a dual-axis excitation condenser provided by the present invention, the dual-axis excitation condenser is a 300Mvar dual-axis excitation condenser, which is slotted and placed at the large tooth position of the hidden pole condenser rotor The excitation winding is used as the q-axis excitation winding, and the axis of the q-axis excitation winding is perpendicular to the axis of the d-axis excitation winding; the number of slots at the position of the large teeth is Z q There are 8 slots and 36 d-axis excitation winding slots.

[0057] When the dual-axis excitation condenser only excites the d-axis alone, the d-axis excitation winding is fed with DC current, and the q-axis excitation winding is short-circuited. The measured basic air-gap magnetic flux density is 0.835T, 3 times, 5 times, 7 The harmonic contents of the 1st and 9th are 0.005T, 0.056T, 0.098T, and 0.056T, respectively. The total harmonic dis...

Embodiment 3

[0061] Such as image 3 As shown, the excitation winding structure of a dual-axis excitation condenser provided by the present invention, the dual-axis excitation condenser is a 300Mvar dual-axis excitation condenser, which is slotted and placed at the large tooth position of the hidden pole condenser rotor The excitation winding is used as the q-axis excitation winding, and the axis of the q-axis excitation winding is perpendicular to the axis of the d-axis excitation winding; the number of slots at the position of the large teeth is Z q 10, and 36 d-axis excitation winding slots.

[0062] When the dual-axis excitation condenser only excites the d-axis alone, the d-axis excitation winding is fed with DC current, and the q-axis excitation winding is short-circuited. The measured basic air-gap magnetic flux density is 0.806T. The 3rd, 5th, 7th and 9th harmonic content are 0.017T, 0.067T, 0.101T and 0.052T respectively. The total harmonic distortion rate THD calculated by the ...

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Abstract

The invention discloses a dual-axis excitation control camera and an excitation winding structure thereof. Slots are slotted at the large tooth position of a rotor of a hidden pole type modulator and an excitation winding is placed as a q-axis excitation winding. The axis of the q-axis excitation winding is connected to the d-axis. The axis of the field winding is vertical. The invention adopts the excitation mode of dual-axis excitation, which can well improve the static stability and transient stability of the power system, and can realize the asynchronous operation of the motor through different excitation control modes in the event of a fault, thereby reducing the power angle loss. At the same time, through the cooperation of two axes, it can achieve deep phase advance operation, and obtain short-term phase advance capability equivalent to the late-phase overload capability. It has the advantages of strong phase advance function and fast transient response speed.

Description

technical field [0001] The invention belongs to the technical field of dual-axis excitation condensers, and in particular relates to a dual-axis excitation condenser and its excitation winding structure. Background technique [0002] The traditional synchronous condenser has only one set of excitation windings, which are placed on the d-axis of the rotor. This feature determines that its power regulation and operation stability are related to the angle between the magnetic potential of the longitudinal axis of the condenser and the grid voltage, that is, the The condenser is related to the power angle, which limits the range of operational stability. At the same time, because the excitation current of the rotor of the traditional synchronous condenser can only be on the d-axis of the rotor, its maximum phase advance capability is limited by the working condition of the rotor excitation current. The traditional synchronous condenser has poor phase advance ability and is prone...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K3/04H02K19/02H02J3/16
CPCH02J3/16H02K3/04H02K19/02Y02E40/30
Inventor 许国瑞罗超龙刘晓芳张伟华
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)