Rotor multi three-phase AC excitation asynchronous hydraulic generator

A technology for hydroelectric generators and asynchronous generators, which is applied to asynchronous induction motors, control generators through magnetic field changes, and electrical components, etc., and can solve problems such as complex inverter structures, harmonic pollution of power grids, and low power factors. Achieve the effects of solving heat problems, improving potential waveforms, and improving reliability

Inactive Publication Date: 2005-12-07
ZHONGYUAN ENGINEERING COLLEGE
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AI Technical Summary

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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  • Rotor multi three-phase AC excitation asynchronous hydraulic generator
  • Rotor multi three-phase AC excitation asynchronous hydraulic generator
  • Rotor multi three-phase AC excitation asynchronous hydraulic generator

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Embodiment Construction

[0056] Instructions attached Figure 6-9 It is an embodiment of multiple three-phase AC excitation hydroelectric generators. The power of the motor is 170MW, the voltage is 13.8KV, and the rated speed of the motor is 54.6rpm. The stator winding of the generator is three-phase, which is directly connected to the power frequency grid, while the rotor winding has multiple groups of three-phase symmetrical windings which are independent on the circuit. The motor rotor wave winding structure is shown in Figure 5 . In the multi-phase system of the rotor, the winding connection diagram of the 4×3-phase rotor winding is adopted, and the winding adopts integer slots. 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 stator slots Z=1320 and the number of magnetic poles 2p =110, the number of slots per pole and each phase q=1, and the pole distance τ=12, because...

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Abstract

This invention refers to a rotor more three-phase ac excitation hydraulic generator 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 360 degree/(nX3), 180 degree/(nX3), or 0<=beta<180 degree/(nX3).

Description

Technical field: [0001] The invention relates to a multi-rotor three-phase AC excitation hydraulic generator which adopts an inverter to supply power to rotor windings. Background technique: [0002] For the hydroelectric power generation system, the water head and flow of the reservoir during the flood season and the non-flood season are very different. During the flood period, due to the high head and relatively large flow, the fixed-speed hydroelectric generator cannot use this energy, and often produces a large amount of abandoned water; In the non-flood season, due to the relatively low water head, the turbines and generators often work in a lower efficiency range due to the limitation of constant speed operation. The conventional hydro-generator set can only run at the rated synchronous speed, and the speed of the unit is fixed. Therefore, the operating condition of the hydro-generator is solely determined by the water head and load, and there is no room for adjustmen...

Claims

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Application Information

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IPC IPC(8): H02K17/42
Inventor 王晓雷
Owner ZHONGYUAN ENGINEERING COLLEGE
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