第1个回答 2009-05-29
TV ferro-resonance in power system is a kind of self-excited oscillation often happens, from the current and voltage to the safe and stable operation of the power system caused great influence. The characteristics of transformer core is saturated by the reason of ferroresonance transformers inductance characteristic, the research helps to prevent and eliminate ferroresonance, so as to ensure the safe operation of the power system.
The phenomenon of ferroresonance and its mechanism are discussed briefly in power system, TV ferro-resonance makes a brief analysis of the influence. Based on the second side open-circuit voltage transformer is the basic model, from the core of the nonlinear excitation inductance resonant circuit established mathematical model, analyses the working, TV ferro-resonance in experimental way emersion the ferroresonance, measuring excitation characteristic obtained data, drawing the excitation characteristic, the volt-ampere characteristics using graphic method. Describing function method, analytical method of mathematical analysis, combined with the experiment data, analyzing the different frequencies. Ratios, type, under the excitation inductance characteristic of iron. And put forward to prevent ferroresonance in eliminating the suggestion.
Ferro resonance
Transformer,
Excitation characteristic
Mathematical analysis本回答被网友采纳
第2个回答 2009-05-29
Ferroresonance in power systems is a frequently occurring phenomenon of self-excited oscillation, resulting in the over-current and over-voltage on the power system of safe and stable operation have had a great impact. Characteristics of transformer core saturation is caused by the reasons for ferroresonance, transformer magnetizing inductance characteristics of the study contribute to the prevention and elimination of ferromagnetic resonance, in order to ensure the safe operation of power systems.
Ferroresonance article on the phenomenon and its mechanism are briefly discussed Ferroresonance impact on the power system to do a brief analysis. Article to the second side of the open-circuit voltage transformer for the basic model, from the core excitation of the nonlinear inductance approach and establish a mathematical model of the resonant circuit, an analysis of the work of ferroresonance point, the way the experiment again with a ferromagnetic the occurrence of resonance, the excitation characteristics of measurement data, mapping of the voltammetric characteristics of the excitation characteristics of maps, the use of graphic method. Describing function method, analytical method for the mathematical analysis, combined with the experimental data, an analysis of different frequencies. Turns, the type of core characteristics under the excitation of the law of inductance. And put forward in the elimination of ferroresonance prevention recommendations.
Keywords: Ferromagnetic resonance; transformer; excitation characteristics; mathematical analysis
第3个回答 2009-05-29
Ferroresonance in power systems is a frequently occurring phenomenon of self-excited oscillation, resulting in the over-current and over-voltage on the power system of safe and stable operation have had a great impact. Characteristics of transformer core saturation is caused by the reasons for ferroresonance, transformer magnetizing inductance characteristics of the study contribute to the prevention and elimination of ferromagnetic resonance, in order to ensure the safe operation of power systems.
Ferroresonance article on the phenomenon and its mechanism are briefly discussed Ferroresonance impact on the power system to do a brief analysis. Article to the second side of the open-circuit voltage transformer for the basic model, from the core excitation of the nonlinear inductance approach and establish a mathematical model of the resonant circuit, an analysis of the work of ferroresonance point, the way the experiment again with a ferromagnetic the occurrence of resonance, the excitation characteristics of measurement data, mapping of the voltammetric characteristics of the excitation characteristics of maps, the use of graphic method. Describing function method, analytical method for the mathematical analysis, combined with the experimental data, an analysis of different frequencies. Turns, the type of core characteristics under the excitation of the law of inductance. And put forward in the elimination of ferroresonance prevention recommendations.
这是关键字:Ferroresonance; transformer; excitation characteristics; mathematical analysis
第4个回答 2009-05-29
TV ferro-resonance in power system is a kind of self-excited oscillation often happens, from the current and voltage to the safe and stable operation of the power system caused great influence. The characteristics of transformer core is saturated by the reason of ferroresonance transformers inductance characteristic, the research helps to prevent and eliminate ferroresonance, so as to ensure the safe operation of the power system.
The phenomenon of ferroresonance and its mechanism are discussed briefly in power system, TV ferro-resonance makes a brief analysis of the influence. Based on the second side open-circuit voltage transformer is the basic model, from the core of the nonlinear excitation inductance resonant circuit established mathematical model, analyses the working, TV ferro-resonance in experimental way emersion the ferroresonance, measuring excitation characteristic obtained data, drawing the excitation characteristic, the volt-ampere characteristics using graphic method. Describing function method, analytical method of mathematical analysis, combined with the experiment data, analyzing the different frequencies. Ratios, type, under the excitation inductance characteristic of iron. And put forward to prevent ferroresonance in eliminating the suggestion.
Keywords: ferroresonance, Transformer, Excitation characteristic, Mathematical analysis