Rotating diode one-tube open circuit detection method and system of multi-phase angle joint brushless exciter
A rotating diode and open-circuit detection technology, which is applied in the field of exciters, can solve the problems of low reliability and achieve the effects of high detection reliability, accurate discrimination, and reduced process difficulty and cost
Active Publication Date: 2019-05-10
GUANGDONG NUCLEAR POWER JOINT VENTURE +10
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[0004] Based on this, it is necessary to provide a multi-phase delta-connected brushless exciter rotary diode-tube open circuit detection method and system for the problem of low reliability of the traditional rotary rectifier fault detection method
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[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described more comprehensively through the following embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0026] In one embodiment, a multi-phase delta-connected brushless exciter rotating diode-tube open circuit detection method is provided, please refer to figure 1 , including the following steps:
[0027] Step S100: Obtain the excitation current entering the stator excitation winding of the exciter.
[0028] The stator field winding, also known as the armature, is a component used to generate electromotive force. When the multi-phase delta-connected brushless exciter is working, the excitation device supplies a certain excitation current to the multi-phase delta-connected brushl...
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The invention relates to a rotating diode one-tube open circuit detection method and system of a multi-phase angle joint brushless exciter. The method comprises the following steps: after the excitingcurrent entering a stator exciting winding of the exciter is obtained, dividing the exciting current into two paths to obtain first exciting current and second exciting current, delaying the first exciting current for a reference time to obtain first delayed exciting current, subtracting the second exciting current from the first delayed exciting current to obtain current containing odd harmonics, adding the first delayed exciting current with the second exciting current to obtain third exciting current, filtering a DC component in the third exciting current and the component of phase multiple reference frequency to obtain current containing even harmonics, and performing diode one-tube open circuit detection according to the current containing the odd harmonics and the current containingthe even harmonics. By adoption of the method, accurate fault determination can not only be achieved, the motor structure does not need to be modified, thereby reducing the process difficulty and thecost, and the detection reliability is high.
Description
technical field [0001] The present application relates to the field of exciter technology, in particular to a method and system for detecting a rotating diode-tube open circuit of a multi-phase delta-connected brushless exciter. Background technique [0002] The multi-phase delta-connected brushless exciter can not only reduce the capacity requirement of a single diode in the high-power excitation system, but also improve the quality of the rectified voltage and the fault tolerance of the system, and has been widely used. However, the rotating rectifier in the multi-phase delta-connected brushless exciter is in a high-speed rotating state, and the diode is easily damaged during operation. The exciter can still provide normal current to the main generator at the initial stage of the open circuit fault, but if the fault continues to deteriorate, it will Seriously affect the normal operation of the main generator, causing serious consequences, and because the diode is in a high...
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Login to View More IPC IPC(8): G01R31/26G01R31/27G01R31/02
Inventor 屈天龙杨德广许勇斌刘斌段贤稳郭立雄吴超徐文兵秦余新钟浩文韦玉榜任仰凯王晓明李文武郝亮亮桂林王祥珩
Owner GUANGDONG NUCLEAR POWER JOINT VENTURE