The generator rotor interturn short-circuit MYG - RSO detection technology introdution        

problem is not a very precise technology.Before costly disassembly and maintenance carried out on the generator rotor, the rotor of generator are often need a lot of validation test data, the existence of additional testing to confirm the rotor of the generator turn-to-turn short circuit problem.At this time, generally the following three tests to help customer to verify whether the generator rotor is interturn short circuit problem:
N heat stability test - including change generator operating parameters such as, active, reactive power, cooling, etc., and record and analysis the influence of the vibration characteristics of the rotor.So this is generally the expert type analysis, need with the help of experience and professional knowledge.
N generator installation flux sensor to measure and analysis of rotor magnetic flux density of each slot.But some generator installation flux sensor and many did not.Magnetic flux sensor installation usually need to stop, especially hydrogen cooling unit.For the average customer is not easy to do.And in many cases need to adjust the generator load to match test.For the average power plant is difficult to do.
N RSO testing methods, which focus on below:
Need to pay attention to the vibration characteristic analysis is mentioned, thermal stability testing, magnetic flux analysis and RSO interturn short circuit test is the rotor of the generator test experiment method.But when by using the abnormal turn-to-turn short circuit, or short circuit in the middle part of the turn, or other reasons cause it balances, or repeated multiple turn-to-turn short circuit, or intermittent or of short circuit or other reasons cause generator vibration, etc., with other test methods, the verification results are questionable.
RSO also called repetitive pulse test, test the repetitive pulse method, positive and negative poles in the rotor places a high frequency of low voltage pulse signal, using oscilloscope to observe the response of output response signals at the same time, under normal circumstances, due to the symmetrical distribution of rotor winding, positive and negative poles of the impulse response signals should be completely consistent, reflected in the waveform diagram, the two corresponding curve should be completely overlap, the subtraction wave is a straight line, once can't completely overlap, subtracting the wave bumps, rotor winding insulation is abnormal.                                                          

Accuracy of measurement
To accurately assess interturn short circuit fault, according to foreign using records, with 97% accuracy
Repetitive pulse method in measuring rotor winding interturn short circuit?Compared with other detection methods repetitive pulse method has the following advantages:
1. bud interturn short circuit fault can be detected
2. don't need pump rotor
3. the site using low difficulty
4.  can be fault location, convenient customer service
5. can be dynamic measurement
6 one of the most effective and

Compared with other test methods, RSO testing method is very has the advantage.It is able to periodically repeating test, to verify whether there is a short circuit during the rewind to hit, in the case of disconnection of excitation system, can be in the stationary state rotor and rotor rotating de-energized for testing.
MYG - RSO interturn short-circuit analyzer generator rotor parameters
1. is suitable for the diode or quadrupole hidden large steam turbine generator rotor interturn short circuit testing;
2. brand: MYG - RSO, two kinds of specifications:
3. TDR100RB apply voltage 110 or 220 vac, application range of 90 ~ 120%, need to match the oscilloscope for testing
3. TDR200RB applied voltage 110 or 220 VAC, application range of 90 ~ 120%, and a corresponding software and can be tested in the computer display.
4. surge protection
5. 50 hz or 60 hz
6. 12 volts peak output voltage 12 V, rising wave width adjustable 20 us - 400 us
7.: n size: W: 305 mm to 152 mm D: 355 mm
8.: weight 5 kg
9. with nickel batteries and lasts for 15 hours

testing picture and connection

                                 Rotor have fault                                                                          Rotor no fault