8 results about "Capacitive voltage divider" patented technology

The application discloses a kind of transformer intelligent enclosed neutral point protection devices, including maintenance switch, lightning arrester, capacitive voltage divider, filter module, isolation transformer, charge-discharge module, voltage detection module, gap discharge unit, digital control unit;Filter module is used to filter the voltage signal of capacitive voltage divider after voltage division flows into isolation transformer, removes high-frequency signal, retains power frequency or its multiple frequency signal, realizes the distinction of transient overvoltage signal and steady overvoltage signal;Voltage detection module is used to detect the voltage amplitude of four capacitors in charge-discharge module, duration, and real-time transmission detection data to digital control unit, and digital control unit real-time uploads detection data to main control background, control pulse trigger controllable switch opens or closes, control discharge of enclosed discharge gap.The application realizes the accurate identification of transformer neutral point overvoltage type, solves the problem of high misoperation rate of existing device, damage transformer.

The utility model provides a kind of 3VA ultra-low power consumption's primary and secondary depth fusion device, including primary switch and FTU controller, primary switch is built-in for the pole of capacitor power taking, and its power side and load side are connected with the output end of a pole respectively;Capacitor power taking module is arranged in pole, and capacitor power taking module includes capacitor voltage divider and electromagnetic unit, one end of the high voltage capacitor of capacitor voltage divider is connected with the high voltage terminal of primary switch, and the other end is connected with the low voltage terminal of primary switch by low voltage capacitor, and the medium voltage capacitor tap of high voltage capacitor and low voltage capacitor is connected with the input end of electromagnetic unit, and electromagnetic unit provides matching inductive compensation output standard 24V low-voltage alternating current.The utility model reaches the effect of easy installation and maintenance, efficient electric energy conversion, low-power operation and self-adapting power management by setting the pole of built-in capacitor power taking in primary side and the power management module of FTU controller.

This application relates to the field of power equipment condition monitoring technology, specifically to a distributed voltage sensing probe, system, and method for dry-type air-core reactors. The probe includes: an annular insulating shell adapted to surround the reactor coil; an induction plate disposed inside the annular insulating shell for coupling with the electric field on the surface of the coil to form a coupling capacitor; and a signal processing module disposed inside the annular insulating shell, which includes a precision voltage-dividing capacitor forming a capacitive voltage divider circuit with the coupling capacitor. The probe, through the capacitive voltage divider circuit, proportionally converts the high voltage of the coil into a low-voltage signal characterizing the voltage of the coil relative to ground or between coils. This ability to proportionally convert the high voltage of the coil into a low-voltage signal characterizing its voltage relative to ground or between coils provides a direct voltage monitoring means for early fault detection inside the reactor, and the probe's adaptability design conforms to the shape of the coil, ensuring the stability of the voltage sensing.

The present application relates to the technical field of high-voltage measuring device of electric multiple unit power system, and particularly relates to a capacitive voltage transformer for electric multiple unit. The voltage transformer is formed into an integrated full-enclosed main insulator by epoxy resin vacuum casting, and the primary high-voltage terminal is a stepped round table type standard C head structure. The inside is composed of a high-voltage capacitor and a low-voltage capacitor to form a capacitive divider, cooperate with a reactor to realize impedance compensation, cooperate with a damper to suppress resonance and overvoltage, and set a protection gap to realize overvoltage protection, and all wiring terminals are arranged in a sealed secondary wiring table. The present application has the advantages of capacitive voltage division and electromagnetic measurement, has the characteristics of small size, flexible installation, anti-resonance, anti-interference, high precision, strong protection, maintenance-free, etc., can adapt to the compact space and harsh operating environment of electric multiple unit, and is suitable for high-voltage measurement and relay protection system of electric multiple unit.

A MOV partial valve piece performance degradation early warning system and method, comprising: the voltage reduction function of the capacitor voltage divider arranged in the spark gap trigger auxiliary loop of the series compensation complete device converts the high voltage of the primary side MOV into low voltage of the secondary side, the low voltage signal of the secondary side is processed through the MOV voltage acquisition channel to obtain the MOV voltage; the current transformer CT in the MOV current loop converts the total circuit current of the primary side MOV and the MOV branch current into small current of the secondary side, the small current of the secondary side is processed through the MOV current acquisition channel arranged in the platform measurement box to obtain the total current of the MOV and the MOV branch current; the early warning analysis processing module takes the total current of the MOV, the MOV branch current and the MOV voltage as the criterion to early warn the performance degradation of the MOV partial valve piece based on the consistency of the volt-ampere characteristic. The present application realizes the prevention of MOV damage and guarantees the safety of the MOV.

The application discloses a kind of capacitive capacity monitoring method and system of flexible direct current converter station bushing, it is related to the field of flexible direct current transmission equipment on-line monitoring and electrical parameter identification technique, including in the bushing of flexible direct current converter station bushing end screen and ground setting capacitor voltage divider and constructing series capacitor measurement structure, acquisition bushing primary voltage signal and end screen current.Primary voltage signal and end screen current are carried out synchronous signal preprocessing, using wavelet transform and filtering strategy to remove noise and extract frequency domain features.Capacitive capacity coupling relationship of bushing structure parameter is calculated based on frequency domain features, and abnormal point is judged by establishing capacitive capacity change identification model and combining temperature and humidity data.The method described in the application effectively overcomes the problems of static analysis lag, single variable misjudgment and insufficient frequency spectrum resolution, realizes real-time monitoring of flexible direct current bushing capacitive capacity, abnormal dynamic early warning and system improvement of model adaptability, and significantly enhances the safety operation guarantee capability of equipment throughout its life cycle.

Various aspects relate to a memory cell, the memory cell including: a field-effect transistor structure; and a capacitive memory structure; wherein the field-effect transistor structure and the capacitive memory structure are configured to form a capacitive voltage divider; wherein the capacitive memory structure includes: a first electrode layer, a second electrode layer, and a memory element structured to have at least a first region extending from the first electrode layer to the second electrode layer and a second region extending from the first electrode layer to the second electrode layer, wherein the first region consists of a first material, wherein the second region consists of a second material, and wherein the first material is different from the second material.

This utility model belongs to the field of cable testing technology, specifically relating to a reusable dry-type high-voltage cable partial discharge test terminal, including a capacitive voltage divider and a dielectric loss device electrically connected to the test taps in the capacitive voltage divider via wires. The capacitive voltage divider includes an insulating cylinder and equalizing rings one and two disposed at both ends of the insulating cylinder. The insulating cylinder contains an insulating medium and has cable conductors inserted inside. A support is fixedly connected to the bottom of the insulating cylinder. The support includes a base plate, a vertical support plate, and a horizontal support plate. The vertical support plates are symmetrically disposed on both sides of the horizontal support plate and the base plate is fixedly connected to the bottom. The bottom plate of the vertical support plate and the two side plates of the horizontal support plate have matching through holes. The horizontal support plate is connected to the vertical support plate by fasteners, and the insulating cylinder is connected to the horizontal support plate by fasteners. The beneficial effect of this utility model is that it adds a dielectric loss device to measure the loss value of medium and high voltage cables during full-power operation.