Correction method for rotor winding temperature rise test
A technology of rotor winding and temperature rise test, which is applied in the direction of motor generator testing, measuring electricity, measuring devices, etc. higher question
Active Publication Date: 2017-05-24
HARBIN ELECTRIC MASCH CO LTD
View PDF7 Cites 4 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, for the rotors of some generators, the test value of the thermal state of the rotor winding determined by the resistance method is relatively high, and does not match the design calculation value.
In some generators, the temperature difference between the thermal state temperature of the rotor winding and the temperature of the stator winding test is 30K. According to the design calculation and practical experience, it is not normal for the temperature difference between the stator winding and the rotor winding to be so large.
Through field tests, analysis and research, it was found that this error was caused by: the test positions of the rotor cold resistance and hot resistance are different, that is, the rotor cold resistance and hot resistance are not the same resistance, and the resistance method under the same resistance is used There will inevitably be deviations in the temperature determined by the calculation formula
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
specific Embodiment approach
[0073] The present invention proposes a correction method for the temperature rise test of the rotor winding, which is used to correct the test position of the cold state resistance and the hot state resistance, such as figure 1 As shown, shaft 1, slip ring 2, lead wire 3, and lead wire end fixing bolt 4; position A: test position for voltage of rotor slip ring in hot state; position B: test position for DC resistance of rotor in cold state, which causes the rotor temperature rise test position Deviation problem, the specific embodiment of the present invention is as follows:
[0074] The first step is to conduct three generator temperature rise tests under different operating conditions
[0075] Under different operating conditions, the temperature rise test of the generator was carried out three times, and the rotor input power was 80% P f1 f2 f1 , 80%P f2 f3 f2 range, the maximum power point P f1 Close to the rated rotor power P fN ;P f1 ,P f2 ,P f3 is the rotor inpu...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention proposes a correction method for rotor winding temperature rise tests. The correction method is used for correcting a deviation problem of a rotor temperature rise test caused by different test positions of a cold-state resistor and a thermal-state resistor, that is, the cold-state resistor and the thermal-state resistor are not the same resistor. The correction method comprises the steps of: conducting generator temperature rise tests for three times under different operating conditions; calculating rotor input power and rotor thermal-state average temperature rise; regarding rotor power Pf as the abscissa, regarding rotor temperature rise delta t as the ordinate, and drawing rotor temperature rise data of the three temperature rise tests on a coordinate graph, wherein a temperature rise curve is extended linearly, the extended line intersects at the ordinate axis, and a distance from the intersection point at the ordinate axis to the origin is h, when h is greater than 5k, the rotor temperature rise needs to be corrected, and a correction value thereof is h; and regarding a difference between a test value and the correction value of the rotor temperature rise as an actual value of the rotor temperature rise.
Description
[0001] Technical field: [0002] The invention relates to a correction method for the temperature rise test of a rotor winding. Background technique [0003] The thermal state temperature of the rotor winding is an important performance index of a large generator. It is related to the heating and cooling of the rotor, loss and efficiency, whether the generator can operate normally, and the service life of the generator. Due to the different temperature environments of the generator operating conditions, the generator professionally introduces the technical performance index of "temperature rise", that is, the difference between the winding temperature and the cooling medium temperature for assessment. [0004] The test method for the thermal state temperature of the rotor of a large synchronous generator is the resistance method, that is, the thermal state temperature of the rotor is determined by using a specific proportional relationship between the change of the resistance ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/34
CPCG01R31/346
Inventor 苟智德闵广达刘平安李广德富立新梁彬魏长健蒋宝钢孙玉田刘新天李延智韩波李明宇韩毅陈辉杨村栋
Owner HARBIN ELECTRIC MASCH CO LTD