Electromagnetic property testing simulator for hydro-generator

Abstract

The invention relates to an electromagnetic property testing simulator for a hydro-generator, wherein a stator winding is embedded in a stator core slot, the end of the stator winding is provided witha plurality of taps, a rotor winding is sheathed on a rotor pole and provided with a plurality of taps which are led out by multipath slip rings; a damper winding is embedded in a damping slot of thepole; the end and body of the damping winding are provided with a current measuring element and a temperature measuring element; a testing signal is emitted by a multichannel wireless digital telemetering device and enters a peripheral monitoring device; the rotor shaft extension end is provided with a torque and an online rotate speed telemetering device; and a stator core inner circle is provided with a magnetism-measuring element air-gap flux detector. The testing simulator can measure the rotate speed and torque of the generator under operating conditions; and simultaneously, the testing simulator can conduct false synchronization experiments of various short circuits and small angles, which are difficult to be conducted on true hydro-generator.

Description

Technical field: [0001] The invention relates to an experimental simulator for electromagnetic performance of a hydraulic generator. technical background: [0002] The structure of the hydroelectric generator mainly includes: stator core and winding, rotor core and winding, frame and slip ring, etc. With the increase of capacity, the design and manufacture of hydro-generator becomes more and more difficult. The hydroelectric generator is an electromagnetic device. The magnetic field in the electromagnetic device is distributed and nonlinear, and its performance is also affected by various factors such as temperature and stress. It is difficult to obtain accurate results by mathematical calculation methods. Experiments are an important link in the development and research of hydroelectric generators. Unfortunately, for large hydroelectric generators, some experiments do not have experimental conditions on real machines, and some experiments are even destructive on real machi...

AI Technical Summary

Problems solved by technology

There are two types of existing damping bar current measurement methods, one is the method of combining calculation and experiment, this type of method introduces various errors in the calculation of electromagnetic problems (such as: nonlinear error, equivalent error of distributed magnetic field, etc. ), so the real result cannot be obtained; the other is to obtain the damping strip current by measuring the voltage drop between two points on the damping strip or measuring the induced voltage connecting each pair of adjacent damping strips to obtain the damping strip current

In this method, due to the limited extension length of the end of the damping strip, the amplitude of the sampling signal is small, the error interference is large, and it is difficult to obtain accurate measurement results.

The above measurement method needs to use the slip ring to extract the signal, thus introducing the contact error of the slip ring

Images