Transformer multi-parameter fault monitoring system and detecting method
A fault monitoring and transformer technology, applied in the direction of measuring electrical variables, instruments, measuring electricity, etc., can solve problems that affect the safe and stable operation of the power system, insufficient information fusion capabilities, no theoretical basis and systematic concept system, etc., to achieve relief The effect of fault detection and maintenance pressure, enhanced equipment utilization, and improved detection efficiency
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[0043] The present invention is described in further detail below in conjunction with accompanying drawing:
[0044] A transformer multi-parameter fault detection method, comprising the following steps:
[0045] Separately collect partial discharge ultrasonic signals of the transformer and internal vibration signals of the transformer winding; combine the collected partial discharge ultrasonic signals and vibration signals to obtain a combined signal s(n);
[0046] Let the partial discharge ultrasonic signal be f(n), and the internal vibration signal of the transformer winding be e(n),
[0047] The combined signal s(n) is obtained by the following formula 1:
[0048] s(n)=f(n)+σe(n) (1)
[0049]
[0050]
[0051] σ is the variation coefficient, and the value of σ is 1.6; C j,k is the dimension of the energy of the partial discharge signal, C i,k There is a dimension of energy in the vibration signal; according to the principle of energy superposition, the partial disch...
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