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This paper reports a CCVT calibration effort for harmonic voltage measurement purpose. A set of frequency response studies are conducted on two types of 345-kV Coupling Capacitor Voltage Transformers (CCVT). The Electro-Magnetic Transients Program (EMTP) is used to develop the CCVT model and conduct this digital simulation. The accuracy of the CCVT frequency response study result is verified through...
The paper derives a closed-form analytical approximation of the output currents harmonic spectra for the three-phase neutral-point inverters under the action of hysteresis current control. The model is an extension of the recently developed model for single-phase two-level hysteresis inverters. The model derives the instantaneous frequency of the inverter and then uses it to approximate the error...
The paper derives a closed-form analytical approximation of the output current harmonic spectrum for the three-level single-phase inverters under the action of hysteresis current control. The error current harmonic spectrum is directly calculated from the system and controller parameters. The analytical approach consists of deriving the instantaneous frequency of the error current and then approximating...
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