2 results about "Resistive capacitive" patented technology

Solid-state circuit breakers (SSCBs) have been witnessing an impressive progress with the aid of wide bandgap (WBG) devices such as silicon carbide (SiC) MOSFETs. Along with obtaining high efficiency as the result of low on-state resistance, response times have been gaining remarkable achievements in microseconds range. Not only that, the reported successes in control and gate drivers design and incorporating fault detection / location techniques in SSCBs are promising. A MOV-resistive capacitive switch (MOV-RCS) snubber for solid state circuit breakers addresses the following: 1) the MOV degradation issue in DCCBs is solved, 2) the maximum allowable DC bus voltage on DCCBs is extended. The solid state circuit breaker and an active clamping snubber includes a first circuit including a fault current bypass based solid state breaker for low voltage direct current systems.

This invention relates to the field of power system insulation monitoring technology and discloses a method for identifying and monitoring resistive and capacitive residual current in electrical equipment. The method includes: synchronously acquiring a bus voltage reference signal and a total residual current signal; extracting the zero-crossing moment of the lockout voltage using the fundamental component; dividing the time-series orthogonal intervals and calculating the piecewise charge integral; comparing the integral differences between the positive and negative half-wave mirror symmetrical positions to determine the phase shift angle caused by the nonlinearity of the measurement link; shifting the integral boundary accordingly to maintain the physical phase orthogonality; and, based on the intrinsic independence of resistive and capacitive components, using a covariance optimization mechanism to remove projection interference and output resistive residual current data. This invention utilizes waveform symmetry to self-calibrate the sensor's dynamic phase shift, eliminating the projection penetration of capacitive components onto the resistive observation axis, ensuring that the identified data corresponds to the true physical loss properties of the insulation medium, and improving the accuracy of insulation degradation trend assessment.