Dissertation > Industrial Technology > Electrotechnical > High Voltage Engineering > Overvoltage and Its Protection > Internal Overvoltage

Research on Mechanism and Eliminstion of Ferroresonance in Distribution Networks

Author HuCheng
Tutor HuangYanQuan
School Southwest Jiaotong University
Course Proceedings of the
Keywords Ferroresonance PT model Harmonic elimination measures Low frequency over- saturation current
Type Master's thesis
Year 2010
Downloads 233
Quotes 2
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Ferroresonance over-voltage is an internal over-voltage distribution network often . In order to monitor the power generation and substation bus voltage to ground , usually in the bus connected voltage transformers, voltage transformers , the primary winding received more star neutral point directly to ground . The voltage transformer the excitation impedance and system capacitance to ground of the non-linear resonant circuit is formed . Different circuit parameters and external excitation conditions , may produce a divide- and -frequency or high-frequency ferroresonance . Over-voltage and over-current resonance , seriously affecting the operation of the system security . Therefore fully understand the mechanism of ferromagnetic resonance , ferromagnetic resonance overvoltage model simulation is particularly important . 35kV and 10kV system based on MATLAB simulation platform , the establishment of a model of electromagnetic voltage transformer neutral point grounding system ferroresonance 35kV and 10kV distribution network model . During the simulation , the PT module MATLAB platform simulation experiments to get good results . The simulation of actual line simplification and related harmonic elimination measures . Verify the the 4PT wiring can suppress the occurrence of ferroresonance good . Made subject appear a Power Bureau the Shiqiaopu station and the new soap station the PT high pressure side fuse blown . Suppress the ferromagnetic resonance , the current low-frequency low-frequency resonance caused by ferromagnetic resonance oversaturated and verified 4PT wiring inhibition overcurrent and overvoltage .

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