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In atomic, molecular, and solid-state physics, the electric field gradient (EFG) measures the rate of change of the electric field at an atomic nucleus generated by the electronic charge distribution and the other nuclei. The EFG couples with the nuclear electric quadrupole moment of quadrupolar nuclei (those with spin quantum number greater than one-half) to generate an effect which can be measured using several spectroscopic methods, such as nuclear magnetic resonance (NMR), microwave spectroscopy, electron paramagnetic resonance (EPR, ESR), nuclear quadrupole resonance (NQR), Mössbauer spectroscopy or perturbed angular correlation (PAC). The EFG is non-zero only if the charges surrounding the nucleus violate cubic symmetry and therefore generate an inhomogeneous electric field at the position of the nucleus.
Insulator detection method and system
PendingCN122150710AElectrical testingThermometer applicationsElectrical field strengthTime distribution
The application discloses a kind of insulator detection method and system, applied to insulator detection field, comprising: the electric field intensity peak value variation characteristic of target insulator, electric field gradient characteristic, energy symmetry distribution characteristic, temperature space-time distribution characteristic and discharge pulse space-time characteristic are obtained;Based on the energy symmetry distribution characteristic, the detection position determined based on the electric field intensity peak value variation characteristic and the electric field gradient characteristic is carried out interference filtering processing, and the position detection data of the target insulator is obtained;Based on the temperature space-time distribution characteristic and the discharge pulse space-time characteristic, the internal and external detection data of the target insulator is determined;Based on the position detection data and the internal and external detection data, the deterioration detection result of the target insulator is determined.The application is analyzed by temperature distribution, electric field distribution and discharge signal of insulator, and deterioration detection is carried out point by point layer by layer, and the accuracy of insulator deterioration detection is improved.
Owner:STATE GRID ZHEJIANG ELECTRIC POWER CO LTD HANGZHOU POWER SUPPLY CO