Static identification method for simultaneous detection of rotor resistance and excitation inductance
A technology of rotor resistance and excitation inductance, which is applied in the field of static identification of simultaneous detection of rotor resistance and excitation inductance, can solve the problems of increasing the workload of the control system and the inability to detect rotor resistance and excitation inductance at the same time, so as to reduce the impact and achieve accurate measurement results , the effect of overcoming the dead zone effect
Active Publication Date: 2016-03-09
TIANJIN RES INST OF ELECTRIC SCI
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[0004] However, during the operation of this online identification method, it is necessary to briefly inject certain harmonics into the rotor flux linkage at regular intervals during the steady-state operation of the system to form a dynamic change in the flux linkage, which increases the workload of the control system and cannot Simultaneous detection of rotor resistance and excitation inductance
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[0021] The implementation of the present invention will be described in further detail below in conjunction with the accompanying drawings. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.
[0022] A static identification method for simultaneous detection of rotor resistance and excitation inductance, the method is the stator resistance R s , Stator leakage inductance L so , excitation mutual inductance L m Connect in series and load the input voltage u s , at the excitation mutual inductance L m A rotor leakage inductance L is connected in parallel at both ends ro and rotor resistance R r A series circuit, the stator resistance R s side with stator current i s , rotor resistance R r side with rotor current i r , the measurement steps are:
[0023] ⑴The input voltage makes the stator current set to 30% of the rated current, and after stabilization, the t 0 Output voltage u at any time 0 ...
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The invention relates to a static identification method for simultaneous detection of rotor resistance and excitation inductance. The method includes the following steps: a stator resistor Rs, a stator leakage inductor Lso and an excitation mutual inductor Lm are connected in series and an input voltage us is loaded, two ends of the excitation mutual inductor Lm are connected in parallel with a series circuit of a rotor leakage inductor Lro and a rotor resistor Rr, the stator resistor Rs side is provided with stator current is, the rotor resistor Rr side is provided with rotor current ir, measurement is performed through stator side inductance, rotor resistance and excitation inductance, and stator side equivalent full leakage inductance is obtained through calculation. The static identification method for simultaneous detection of the rotor resistance and excitation inductance provided by the invention overcomes a dead zone effect, adopts a current closed loop to identify the rotor resistance and excitation mutual inductance, reduces influence brought by a stator side current change, and enables a measuring result to be relatively accurate.
Description
technical field [0001] The invention belongs to the field of electric power measurement and detection, in particular to a static identification method for simultaneously detecting rotor resistance and excitation inductance. Background technique [0002] At present, in the technical field of detecting motor rotor resistance, many scholars and engineers have proposed different measurement methods. For example, in the model reference adaptive system, build an adaptive rate to identify the stator resistance, and identify the rotor resistance online according to the ratio between the stator and rotor resistances in the offline state. The disadvantage of this method is that it depends on the accuracy of stator resistance identification and the fixed 1. When the rotor resistance has the same temperature rise change, the change trend of the two is unknown; there is also a method of injecting two harmonics of different frequencies into the excitation component of the stator current, ...
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IPC IPC(8): H02P21/22H02P21/14H02P27/06
CPCH02P27/06
Inventor 王建峰田凯宋鹏张策王自满李钊孙传杰
Owner TIANJIN RES INST OF ELECTRIC SCI