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Pumped storage power generator running at continuously variable speed and non-continuously variable speed

A technology of stepless speed regulation and pumped storage, which is applied in the direction of controlling the generator through the change of the magnetic field, can solve the problems of not being able to effectively improve the adaptability of the unit, reduce vibration cavitation and sediment wear, broaden the range of change, The effect of improving operating efficiency

Inactive Publication Date: 2016-08-10
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional speed regulation of pumped storage units has certain defects and limitations in technology, and the single frequency conversion speed regulation and pole-changing speed regulation method cannot effectively improve the adaptability of the unit under multiple working conditions

Method used

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  • Pumped storage power generator running at continuously variable speed and non-continuously variable speed
  • Pumped storage power generator running at continuously variable speed and non-continuously variable speed
  • Pumped storage power generator running at continuously variable speed and non-continuously variable speed

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Embodiment Construction

[0013] In the pumped storage motor with both step and stepless speed regulation of the present invention, the generator is a three-phase AC power supply generator, refer to figure 1 , the outlet form of the stator winding and the rotor excitation winding is a six-port outlet, that is, D 1 、D 2 、D 3 、D 4 、D 5 、D 6 , the stator winding and the rotor excitation winding adopt pole-changing speed regulation, and the pole-changing speed regulation is divided into high-speed running gear and low-speed running gear. When high-speed running gear is used, the stator winding is connected in YY type, that is, D 1 、D 2 、D 3 ends shorted together, D 4 、D 5 、D 6 The terminal is connected to the power supply, so as to realize the high-speed operation of the unit; when the low-speed operation gear is used, the stator winding is connected in a Y-type, that is, D 1 、D 2 、D 3 The terminal is directly connected to the power supply, and the D 4 、D 5 、D 6 The end is suspended in the a...

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Abstract

The invention discloses a pumped storage power generator running at continuously variable speed and non-continuously variable speed. The generator is designed to increase the comprehensive running performance of a pumped storage power generator set so that the generator set can be applied to a wider water head scope, achieve high speed adjustment to active power, provide frequency automatic control capacity, increase the stability, and realize smooth self-startup. The technical solutions of the invention are as follows. The generator is a three-phase AC power supply type generator whose outlet wires from the stator winding and the excitation winding are in a six-port manner. Both the stator winding and the excitation winding adopt a speed regulating mode, allowing the switch between a high speed rotation gear and a low speed rotation gear. At the high speed rotation gear, the stator winding is in YY type connection. At the low speed rotation gear, the stator winding is in Y type connection. According to the invention, the power generator can expand the rotation speed change scope of a generator set. With changeable speed, the generator can be better applied to meet the requirements of power generating and water pumping so that the working efficiency of water wheels and water pumps can be improved.

Description

Technical field: [0001] The invention relates to the technical field of motors, in particular to a pumped storage motor with stepless and stepless speed regulation. Background technique: [0002] The pumped storage power station uses the electric energy when the power load is low to pump water to the upper reservoir, and then releases water to the lower reservoir for power generation during the peak power load period. Frequency modulation and phase modulation can stabilize the cycle and voltage of the power system, and should be used as an emergency backup. It can also improve the efficiency of thermal power plants and nuclear power plants in the system. Because the pumped storage unit has four types: power generation, power generation phase modulation, pumping, and pumping water regulation. Stable operation mode and two special operating conditions such as line charging and water pump driving, so the main feature of the pumped storage unit governor is to select different re...

Claims

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Application Information

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IPC IPC(8): H02P9/14
CPCH02P9/14
Inventor 戈宝军王立坤陶大军孙玉田黄士鹏
Owner HARBIN UNIV OF SCI & TECH
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