Multi three-phase AC excitation pumped storage asynchronous generator/motor

A pumped storage and electric motor technology, applied in the direction of asynchronous induction motors, synchronous generators, electrical components, etc., can solve problems such as complex inverter structure, grid harmonic pollution, low power factor, etc., to solve and improve heat generation problems Potential waveform and effect of improving reliability

Inactive Publication Date: 2005-12-07
ZHONGYUAN ENGINEERING COLLEGE
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Problems solved by technology

After the conventional three-phase system is adopted, the power of the AC excitation inverter is as high as tens of megawatts or even hundreds of megawatts, which makes the structure of the inverter complicated, the cost increased, and the manufacture difficult. At the same time, a single three-phase system is adopted. When a phase win...

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  • Multi three-phase AC excitation pumped storage asynchronous generator/motor
  • Multi three-phase AC excitation pumped storage asynchronous generator/motor
  • Multi three-phase AC excitation pumped storage asynchronous generator/motor

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Embodiment Construction

[0052] Instructions attached Figure 5 It is an embodiment of multiple three-phase AC excitation pumped storage power generation / motor. The power of the motor is 330MW, the voltage is 18KV, and the rated speed of the motor is 500rpm. The stator winding of the generator / motor is three-phase and directly connected to the power frequency grid, while the rotor winding has multiple sets of independent three-phase symmetrical windings on the circuit. The motor rotor wave winding structure is shown in Figure 5 . In the rotor multi-phase system, the winding connection diagram of the 4×3 phase rotor winding is adopted. It can be seen from the winding connection diagram that 4 groups of three-phase symmetrical windings are included in the 4×3-phase system. In this embodiment, the number of rotor slots of multi-three-phase AC excitation pumped storage asynchronous generator / motor is Z=216, and the magnetic pole The number 2p=12, the number of slots per pole and each phase q=1.5, and...

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Abstract

This invention refers to a rotor more three-phase ac excitation water pumping energy storage asynchronous generator/motor adopting inverter to supply power, which contains three-phase stator windings directly connected with power frequency network, plurality of groups of three-phase symmetry windings independent in circuit, there is only magnetic circuit coupling among groups without direction relation in electric circuit, the each star connected three-phase windings has independent zero point, the angle connected windings is independent, the total windings phases are multiple times of three, e.g. 2X3, 3X3...NX3 (n is the positive integer greater than 2), the displacement angle can adopt 0<=beta<180 degree/(nX3), or other angle.

Description

Technical field: [0001] The invention relates to a multi-three-phase AC excitation pumped storage asynchronous generator / motor that uses an inverter to supply power to rotor windings. Background technique: [0002] In recent years, countries around the world are actively building pumped storage power stations due to the need for power peak regulation, and pumped storage units are developing in the direction of high speed and large capacity. Generally, the storage capacity of the pumped storage power station is small, and the power generation head and pumping head vary widely, and the power generation head and pumping head are also different. In order to meet the requirements of pumped storage units operating within a relatively large water head (head) range, foreign countries began to develop speed-adjustable pumped storage units in the late 1960s. Compared with conventional fixed-speed units, the use of speed-regulating units in pumped storage power stations has the follow...

Claims

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Application Information

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IPC IPC(8): H02K19/16
Inventor 王晓雷
Owner ZHONGYUAN ENGINEERING COLLEGE
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