The Research Of The De-icing System Driving Mechanism For Electricity Transmission Line Based On Additional Resonant

Transmission lines covered with ice are the major problems affecting thesecurity and stability of power system operation. Recently, the technology of de-icinghas so many kinds, but the most of current de-icing devices on line have largevolume, complex structure and high failure rate, or in transmission line outage is apremise, de-icing cannot realize high efficiency, also affect the stable operation ofpower analysis, in view of the lack of a variety of commonly used de-icingequipment, put forward a new kind of transmission line additional resonance basedon prevent-icing.This thesis first analyzes the background of the subject the icing of transmissionlines in China. Aiming at the shortage of the above de-icing device, put forward thede-icing system driving mechanism for electricity transmission line based onadditional resonant. It can realize automatic transmission lines, the highly effectiveprevent-icing and de-icing operations. The second principle theory of additionalresonant in-depth analysis, establishing the finite element model of transmission lineof bare conductors and icing of transmission lines, by the model analysis of the highinherent frequency and vibration type are obtained value. In the icing thickness limitcase, through the resonant response analysis to determine the excitation of therequired system driving force and the critical amplitude. Frequency range throughthe critical amplitude appears with the combination of the high additional resonantvalue, and then determine the resonant frequency of the desired except ice vibration.According to the external excitation of the required system drive size and de-icingvibration frequency of the maximum value to determine the drive motor model, andthe eccentric wheel mechanism design and calculation, complete the design ofdimension parameter driving mechanism. According to the size of the drive mechanism parameters, combined with the job requirements of the system, completethe de-icing system overall structure and the size of the design.The de-icing process, along with ice disintegration, ice thickness changing, bythe coordination among different organizations, in addition to realize vibrationresonance during ice feedback, and adjustment of the vibration frequency, therealization of prevent-icing and de-icing automatically and efficiently. At thebeginning of the formation of covering ice, driving mechanism generated by externalexcitation resonance and transmission line, the realization of online prevent-icingfunction, for the power system icing problem put forward a new way of thinkingfrom passive to active prevent-icing and de-icing.