Research on Resonance Overvoltage of EHV Transmission Lines Caused by Lightning Strike
نویسندگان
چکیده
This paper studies the mechanism and influencing factors of resonance overvoltage EHV transmission lines caused by lightning. By analyzing time domain steady state simplified circuit, physical is revealed. The characteristics transient process waveform are analyzed using electromagnetic simulation. main amplitude also studied. results show that: 1) During uneven open-phase conditions, resonant circuit involving shunt inductors line equivalent capacitor obtains energy from lightning strikes, which may lead to resonance. 2) can be divided into three stages, including stage, lightning-resonance conversion stage steady-state among voltage first two stages higher; 3) strike time, current parameters subsequent affect on amplitude, leads random in overvoltage.
منابع مشابه
Lightning Protection of Ehv Substations in Iran
Extra high voltage (EHV) substations are extremely vulnerable to the hazard of lightning strokes therefore, the shielding of these substations with a highly reliable protective scheme (shield wires) is an essential undertaking. In this paper an attempt is made to clarify the design procedure for shielding EHV substations against lightning with special reference to Iran.
متن کاملResearch on Ultra-High-Speed Directional Relay of EHV/UHV Transmission Lines Using Wavelet Transform
This paper proposes a novel ultra-high-speed directional relay using the wavelet transform. Two relay signals indicating traveling direction are composed of fault-induced voltage and current waves propagating along EHV/UHV transmission lines. Wavelet transform technique is employed to extract transient components from the relaying signals, and represent the transient component magnitude with wa...
متن کاملFault Location in Ehv Transmission Lines Using Artificial Neural Networks
This paper deals with the application of artificial neural networks (ANNs) to fault detection and location in extra high voltage (EHV) transmission lines for high speed protection using terminal line data. The proposed neural fault detector and locator were trained using various sets of data available from a selected power network model and simulating different fault scenarios (fault types, fau...
متن کاملANFIS Based Fault Location for EHV Transmission Lines
An accurate fault location method for EHV transmission lines is described in this paper, which is based on adaptive Network Based Fuzzy Inference System (ANFIS). The faulted voltages and currents of one line end are used in this technique. The waveforms of voltages and currents include fault information and some of their components is used for fault location. Neuro fuzzy networks come to be a p...
متن کاملLightning Surge Analysis on Grounding Models of a Transmission Lines
Lightning has been one of the important problems for insulation design of power systems and it is still the main cause of outages of transmission and distribution lines. The lightning return-stroke current and the charge delivered by the stroke are the most important parameters to assess the severity of lightning strokes to power lines and apparatus. In order to calculate lightning surge analys...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Access
سال: 2021
ISSN: ['2169-3536']
DOI: https://doi.org/10.1109/access.2021.3109597