Coupling capacitors are used for the decoupling of PD current pulses together with measuring impedances placed in series in standard measuring circuits to convert into voltage pulses for analysis with a PD detector according to IEC 60270. The coupling capacitor also acts to drop the test voltage to a safe, measurable value.
Coupling capacitors are used for the decoupling of PD current pulses together with measuring impedances placed in series in standard measuring circuits to convert into voltage pulses for
Coupling capacitors are provided in series with output of a stage and input of next stage to block effect of DC voltages to be passed on. A capacitor has high impedance to low frequencies and blocks them, and allows high frequencies to pass to next stage. Value of coupling capacitor depends on the frequencies to be passed on. A very low value
This paper proposes a capacitance measurement method that can accurately measure the capacitance under a DC bias of 3 kV. This method decouples the high DC bias voltage and high frequency alternating small signals and realizes low voltage calibration and high voltage isolation.
By combining theoretical derivation with numerical simulation, an electromechanical coupling model of pulse power-MLCC under high voltage and high-impact composite environments was proposed, and the reliability of the model was verified by comparing it with experimental results.
As high voltage pulse power capacitors, ceramic capacitors are widely used in high voltage pulse generators, trigger circuits, laser generators, and other field Skip to Main Content Close
This paper proposes a capacitance measurement method that can accurately measure the capacitance under a DC bias of 3 kV. This method decouples the high DC bias
This paper proposes a novel L-C band pass impedance matching circuit for PLC applications coupled to a Single Wire Earth Return (SWER) network via a 1.1 nF High Voltage (HV) Coupling Capacitor (CC). The work begins with characteristic impedance prediction of various SWER conductors followed by an analysis of the theoretical LC
A high-voltage (HV) standard capacitor of 100 pF, 12 kV (rms) is designed using the charge simulation method (CSM). CSM is a semi-analytical method and it provides inherent advantage in designing a capacitor from the first principle. The capacitance is obtained from the magnitude of the simulating charges of the CSM-based model and
By combining theoretical derivation with numerical simulation, an electromechanical coupling model of pulse power-MLCC under high voltage and high-impact composite environments was
This paper describes two models: a saturable current transformer model (CT) and a wide-band coupling capacitor voltage transformer suitable for real-time transients simulation by using very efficient network reduction and network synthesis techniques. This paper describes two models: a saturable current transformer model (CT) and a wide-band coupling capacitor voltage
A coupling capacitive high voltage energy harvest method is proposed in this paper, which can solve the above problems of the traditional high voltage energy harvest
In this paper, a novel method is proposed based on an inductively coupled in-circuit impedance measurement technique. The proposed method extracts the voltage-dependent capacitances of a MOSFET under its actual biased voltage without making any direct electrical contact, and hence eliminates potential safety hazards.
A high-voltage (HV) standard capacitor of 100 pF, 12 kV (rms) is designed using the charge simulation method (CSM). CSM is a semi-analytical method and it provides inherent advantage in designing a capacitor from the
In this paper, a novel method is proposed based on an inductively coupled in-circuit impedance measurement technique. The proposed method extracts the voltage-dependent capacitances of a MOSFET under its actual biased voltage
The parallel capacitor is a high-voltage ceramic capacitor. The capacitance value is obtained using a TH2840B precision LCR meter with a measurement accuracy of 0.05%, and the capacitance size is 45.86 nF. 3.2.
The experimental coupling network proposed in this paper is evaluated based on the disturbance voltages occurring at the input terminals of the protection device during real switching operations and the new type test.
Experimental results show that the proposed level shifter boosts a low voltage (0 to 20 V) PWM signal at 125 kHz to a high voltage (370 to 380 V) PWM signal with a duty ratio of up to 0.9941.
In order to learn this damage mechanism it requires a non-destructive inspection method. The partial discharge (PD) testing is a method that can detect deterioration and a defect in the electrical insulating material that is not visible. The purpose of this paper is to investigate the impact of harmonic resonance on power capacitor unit insulation. High voltage
The experimental coupling network proposed in this paper is evaluated based on the disturbance voltages occurring at the input terminals of the protection device during real switching
Usually, the secondary voltage of a Coupling Capacitor Voltage Transformer (CCVT) is not a perfect replica of its primary voltage. In this study, the steps to design a hardware capable of performing the correction of the CCVT secondary voltage is presented. The device is basically a recursive digital filter whose parameters are obtained from the CCVT frequency
This paper proposes a novel L-C band pass impedance matching circuit for PLC applications coupled to a Single Wire Earth Return (SWER) network via a 1.1 nF High Voltage (HV) Coupling Capacitor (CC). The work begins with characteristic impedance prediction of various SWER conductors followed by an analysis of the theoretical LC-resonant based
Figure 1, demonstrates the configuration of the suggested converter, which involves a coupled inductor, a switch, an input voltage source, eight diodes, and capacitors.The coupled inductor is
The modular multilevel converter (MMC) is a promising topology for high-power converters. The capacitor voltage balancing method for the submodules (SMs) is one of the key technologies in terms of modular multilevel converters. Aiming at the problems of the large calculation burden and the high switching frequency in the traditional capacitor voltage
A coupling capacitor (C C) is a very common coupling method when performing a PD measurement as described in the IEC 60270 standard. When a partial discharge event occurs, the coupling capacitor provides the devices under test (DUT) with a displacement current, which is measurable at the coupling devices (CPL). Such an approach provides
This paper proposes a novel L-C band pass impedance matching circuit for PLC applications coupled to a Single Wire Earth Return (SWER) network via a 1.1 nF High Voltage
A coupling capacitor (C C) is a very common coupling method when performing a PD measurement as described in the IEC 60270 standard. When a partial discharge event occurs, the coupling capacitor provides the devices under test (DUT) with a displacement current, which is measurable at the coupling devices (CPL).
High quality power is the prerequisite for high precision measurement of an electronic voltage transformer. In order to ensure a compact structure and stable operation of the transformer, this paper proposes a circuit and high voltage energy harvest of high precision electronic voltage transformer based on coupling capacitance.
When a partial discharge event occurs, the coupling capacitor provides the devices under test (DUT) with a displacement current, which is measurable at the coupling devices (CPL). Such an approach provides additional information about the test discharge (PRPD) measurement. OMICRON ofers standard coupling capacitors from 12 kV up to 100 kV.
discharge (PRPD) measurement. OMICRON ofers standard coupling capacitors from 12 kV up to 100 kV. When using a coupling capacitor without an integrated measuring impedance, the low side of the coupling capacitor has to be connected to the input of the CPL measuring impedance (basic test setup with measurement on ground potential).
The main difference between coupled capacitive high voltage energy harvest method and traditional methods are: 1. The traditional energy harvest circuits are voltage-based power sources. The defect of traditional methods is that the voltage has fluctuations when server turbulences occur in the power grid.
As the dc voltage of capacitor C L could be 300 to 700 V, so a transformer ratio 20 is selected to ensure that the secondary voltage will not be below 15 V. Load filter capacitance is used to filter the interference signals, a minimum 470uF is recommended.
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