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161 results about "Capacitive voltage divider" patented technology

Capacitive voltage transformer for gas insulated substation

The invention discloses a capacitive voltage transformer for a gas insulated substation, which comprises a capacitive voltage divider and an electromagnetic unit, the capacitive voltage divider comprises a high-voltage capacitor C1 and a medium-voltage capacitor, the medium-voltage capacitor comprises a medium-voltage capacitor C21 and an externally connected medium-voltage capacitor C22, and the capacitance of the medium-voltage capacitor C22 is greater than that of the medium-voltage capacitor C21; the electromagnetic unit is connected with the capacitive voltage divider, an intermediate transformer and a compensation reactor are arranged in the electromagnetic unit, a full-shielding high-voltage shielding cover is arranged outside a high-voltage coil of the intermediate transformer, a damper and an overvoltage protector are arranged outside the electromagnetic unit, and the damper and the overvoltage protector are placed in an external junction box. The problem that in the prior art, an extra-high voltage transformer is low in lightning impulse overvoltage tolerance capacity is solved, the impulse overvoltage tolerance capacity is improved, and the breakdown risk is reduced.
Owner:山东泰开互感器有限公司

Electric energy quality on-line monitoring device and cloud platform cooperation system

The invention provides an electric energy quality on-line monitoring device and a cloud platform cooperation system, and relates to the technical field of electric energy quality management, and the device comprises a signal collection unit which obtains three-phase voltage and current signals in parallel through a Rogowski coil and a capacitive voltage divider; the event detection unit is used for synchronously executing harmonic spectrum analysis and transient event capture by adopting a parallel processing architecture realized by an FPGA (Field Programmable Gate Array); the edge processing unit is connected with the event detection unit, and is configured to encode the transient event features into a Gramer angle field image and compress steady state data into feature vectors; the multimode communication unit comprises a 4G / 5G wireless module and an optical fiber Ethernet interface; and the strategy execution interface outputs a treatment instruction to the compensation device through the D / A converter and the current loop. Through collaborative innovation of the device and the cloud platform, the power quality monitoring and treatment efficiency is remarkably improved.
Owner:SHANGHAI YING KUANG ELECTRIC CO LTD

High-voltage test method and device for electrical equipment, electronic equipment and storage medium

The invention provides a high-voltage test method and device for electrical equipment, electronic equipment and a storage medium, the method is applied to a high-voltage test device, and the high-voltage test device comprises a bearing platform, a frequency modulation and voltage regulation power supply arranged on the bearing platform, an excitation transformer, an adjustable reactor and a capacitive voltage divider. Comprising the following steps: controlling an adjustable reactor and a capacitive voltage divider to be converted from a storage state to a working state on a bearing platform; target electrical equipment is connected to the output end of the adjustable reactor to form a series resonance circuit; a target test item is determined, and the voltage output frequency and the inductance value of the adjustable reactor are adjusted according to preset target test parameters of the target test item, so that the series resonance circuit reaches a resonance state; and outputting a voltage according to the target test parameter, obtaining a test operation parameter of the target electrical equipment, and generating a target test result according to the test operation parameter. According to the invention, the testing efficiency of high-voltage testing of the ultrahigh-voltage electrical equipment can be improved.
Owner:CHINA NUCLEAR POWER ENGINEERING COMPANY LTD

Capacitive voltage testing device

1. Capacitive voltage testing device. 2.1. The invention relates to a capacitive voltage testing device with a capacitive voltage divider comprising a primary capacitor for coupling to a voltage to be measured at the measuring point and a secondary capacitor for coupling to a reference potential at the evaluation point, and an evaluation unit having a measurement signal input coupled to a center tap of the capacitive voltage divider. 2.2.The capacitive voltage testing device according to the invention comprises a multi-core test lead (4) with a first conductor (A1) and a second conductor (A2) electrically insulated from the first conductor (A1), which together form the primary capacitor (C1), wherein one (A1) of the two conductors (A1, A2) has a measuring voltage connection (5) on the measuring point side and an insulated connection (6) on the evaluation side, and the other conductor (A2) has an insulated connection (7) on the measuring point side and a center tap connection (8) on the evaluation side. 2.3. Use e.g. for voltage testing in low-voltage systems.
Owner:KRIES INGENIEURBÜRO GMBH & CO KG

High-accuracy electronic voltage transformer for broadband voltage measurement

The invention discloses a high-accuracy electronic voltage transformer for broadband voltage measurement, which comprises a capacitive voltage divider, an optical sensor, a power frequency reference voltage acquisition module and a signal processing part, and is characterized in that the capacitive voltage divider comprises a high-voltage capacitive voltage divider, a first low-voltage capacitive voltage divider, a second low-voltage capacitive voltage divider, a signal output terminal and a grounding terminal; the electrodes of the optical sensor are connected in parallel to the two ends of the first low-voltage capacitive voltage divider, and the power frequency reference voltage acquisition module is connected in parallel to the two ends of the second low-voltage capacitive voltage divider and comprises an electromagnetic unit, a power frequency voltage acquisition card and a power supply unit. And the optical sensor and the power frequency reference voltage acquisition module are connected with the signal processing part. By adopting the high-accuracy electronic voltage transformer for broadband voltage measurement, the problem of measurement precision temperature drift caused by temperature influence of an existing capacitive voltage division type optical voltage transformer is solved.
Owner:HARBIN INST OF TECH +1

CONTROL DEVICE, OPTICAL SYSTEM AND LITHOGRAPHY SYSTEM

A control device (100) for controlling at least one actuator (200) for actuating an optical element (310) of an optical system (300), comprising an amplifier (110) which is configured to receive a provided supply voltage (V1) at an input node (K1) and to provide a control voltage (V2) for the actuator (200) at an output node (K2), wherein the amplifier (110) has a resistive voltage divider (R1, R2) for adjusting the gain of the amplifier (110) with a first resistor (R1) and a second resistor (R2) and a capacitive voltage divider (C1, C2) with a first capacitor (C1) and a second capacitor (C2), wherein the capacitive voltage divider (C1, C2) is connected in parallel to the resistive voltage divider (R1, R2).
Owner:CARL ZEISS SMT GMBH

Broadband standard voltage transformer for harmonic transformer error measurement

The invention relates to the technical field of harmonic transformer metering, in particular to a broadband standard voltage transformer for harmonic transformer error measurement, which comprises a capacitive voltage divider body, a frequency detection unit, a measurement control unit, a compensation unit, a shielding shell and insulating oil, the capacitive voltage divider body, the frequency detection unit, the measurement control unit and the compensation unit are arranged in a shielding shell, and transformer oil is further arranged in the shell. And the influence of impedance change under different frequencies, self capacitance drift under different temperature and humidity and stray capacitance under different voltages on the body capacitance is compensated, so that a wide-frequency-domain high-precision standard device is constructed, and the broadband error verification of the power voltage transformer is realized.
Owner:YUNNAN POWER GRID CO LTD

Capacitive voltage divider

ActiveCN222167103Ushorten the lengthReduce the influence of stray inductanceVoltage dividersStray inductanceElectric capacity
The utility model discloses a capacitive voltage divider in the technical field of electrostatic measurement, which comprises a high-voltage arm capacitor, the high-voltage arm capacitor comprises a plurality of capacitors connected in series, and the high-voltage arm capacitor is a hollow cylinder; the low-voltage arm capacitor is arranged in the high-voltage arm capacitor, and the low-voltage arm capacitor comprises at least two low-voltage capacitors which are connected in parallel and have different capacitance values; the high-voltage arm capacitor is connected with the low-voltage arm capacitors through the change-over switch, and the high-voltage arm capacitor can be connected with different low-voltage capacitors through state switching of the change-over switch. According to the utility model, the technical problem that the measurement result is inaccurate due to the fact that the capacitive voltage divider is influenced by stray inductance during human body potential measurement can be solved.
Owner:NANJING INST OF MEASUREMENT & TESTING TECH

Harmonic and ultra-harmonic measuring system and measuring method based on CVT capacitive current principle

The invention discloses a harmonic and super-harmonic measuring system and measuring method based on the CVT capacitive current principle, and belongs to the technical field of harmonic and super-harmonic measurement. According to the method, capacitive current analog signals on a voltage dividing capacitor C1 and a voltage dividing capacitor C2 are collected, the capacitive current analog signals are transmitted to a harmonic and super-harmonic measuring device, and the harmonic and super-harmonic measuring device measures the harmonic and super-harmonic. And the harmonic and super-harmonic measuring device is used for restoring a primary side total voltage waveform based on the capacitance current analog signal, the equivalent capacitance of the voltage dividing capacitor C1 and the equivalent capacitance of the voltage dividing capacitor C2. Influences of internal inductance and capacitance equivalent resistance of the capacitive voltage divider are considered, a primary side voltage reduction formula of the capacitive current method is corrected, and the corrected capacitive current method is suitable for ultra-harmonic measurement.
Owner:POWER RES INST OF STATE GRID SHAANXI ELECTRIC POWER CO LTD +1

High-voltage device high-voltage AC withstand voltage test device and method using capacitive voltage divider

The invention relates to a high-voltage alternating-current withstand voltage test device and method for high-voltage equipment adopting a capacitive voltage divider, and relates to the related field of withstand voltage test, the device comprises a test box and a partition plate fixed in the test box, the partition plate is provided with a test board, the device further comprises test equipment, the test equipment is fixed in the test box, and the test board is connected with the test box. Test wires electrically connected with the test equipment are fixed to the two sides of the test equipment correspondingly, communication assemblies connected with the test wires are installed at the ends, away from the test equipment, of the test wires correspondingly, two bearing pieces are fixed to the test table, and bearing rollers used for bearing test pieces are rotationally installed on the two bearing pieces; the partition plate is provided with a butt joint assembly used for driving the communicating piece to move relatively, the contact pieces make contact with pins of the test piece after the butt joint piece moves to the tail end of the stroke, and a circuit is connected through the communicating assembly when the two contact pieces and the bearing box move to the tail end of the stroke. The connection work can avoid the generation of electric arc when the electric power is cut off through the arc extinction piece, so as to avoid the problem that the test time is prolonged due to the electric arc.
Owner:ANHUI HUIDIAN SCI & TECH +1

Transformer bushing system with self-diagnosis function

A transformer bushing system with a self-diagnosis function comprises A-phase, B-phase and C-phase capacitive bushings with the same voltage class, a secondary capacitive voltage divider and a voltage summary signal box, wherein the secondary capacitive voltage divider and the voltage summary signal box are matched with each other. The transformer bushing system is used as complete equipment in a combined manner during operation. Compared with three-phase bushings of the same voltage level, the three-phase bushings of the same voltage level are not instantaneous voltages, but are compared by firstly monitoring an effective voltage mean value of the three-phase voltages within a certain time and then comparing, and when a certain phase is obviously increased, an early warning signal is sent out. The dry-type bushing suitable for the capacitive insulation structure comprises an RIP sleeve, an RIS sleeve and the like, two measuring taps are arranged at the positions, close to the grounding position, of the bushing, the part led out from the outermost layer is always grounded during operation, the part led out from the secondary end screen is connected with a voltage acquisition input port of a capacitive voltage divider, and the risk that the end screen is out of the ground during operation of the bushing is avoided.
Owner:JIANGSU ZHIDA ELECTRIC

Steering wheel arrangement, vehicle having the steering wheel arrangement, and method for verifying a skeleton connection in the steering wheel arrangement

The invention relates to a steering wheel arrangement 1 for a vehicle comprising a steering wheel device 2, wherein: the steering wheel device 2 has a steering wheel skeleton 3, a first conductive layer 6 and a second conductive layer 8; an inter-layer capacitor C_Layer_12 is formed between the first conductive layer 6 and the second conductive layer 8; a skeleton capacitor C_Skeleton is formed between the second conductive layer 8 and the steering wheel skeleton 3; the steering wheel skeleton 3 can be and / or is coupled to an earth M of the vehicle via a skeleton connection 13; the inter-layer capacitor C_Layer_12 and the skeleton capacitor C_Skeleton form a capacitive voltage divider for a voltage present at the first conductive layer 6; and a partial voltage can be sensed at the second conductive layer 8. The steering wheel arrangement also comprises an evaluation device 16, wherein the evaluation device 16 is designed to detect the partial voltage at the second conductive layer 8 and, on the basis of the detected partial voltage, assess the skeleton connection 13 to be OK, or not OK.
Owner:ZF AUTOMOTIVE GERMANY GMBH

Linear voltage regulator

A linear voltage regulator (140) comprises an input side (205) for connection to an input voltage; a control circuit (212) for providing a predetermined control voltage based on the input voltage; and an output side (210) for providing an output voltage. A linear control element (U3) between the input side (205) and the output side (210) is configured to provide the output voltage with respect to the control voltage. A capacitive voltage divider (220) is also provided, comprising a first (Cp1) and a second capacitor (C5, C6) connected in series with the input voltage, with a tap (225) of the capacitive voltage divider (220) located between the capacitors (Cp1, C5, C6) being connected to the output side (210).
Owner:ZF FRIEDRICHSHAFEN AG

High-voltage capacitor electricity taking device

The invention discloses a high-voltage capacitance electricity taking device, and relates to the field of electric energy storage, the high-voltage capacitance electricity taking device comprises an electricity taking device shell, an electromagnetic unit and a flowing part, an insulating sleeve is arranged on the electricity taking device shell, a capacitance voltage divider is arranged in the insulating sleeve, a spiral cavity is formed in the electricity taking device shell, and a power source is arranged in the spiral cavity. A first flowing opening and a second flowing opening are formed in the inner side wall of the electricity taking device shell, and the spiral cavity communicates with the electricity taking device shell through the first flowing opening and the second flowing opening. When a high-voltage power transmission circuit is switched on and the environment temperature and humidity are relatively high, the flowing part works to enable the locally overheated insulating oil of the electromagnetic unit to circularly flow, and the wind wheel on the connecting shaft rotates to form airflow to perform air-cooling heat dissipation on the expanded heat dissipation fins, so that the insulating oil entering the heat dissipation fins is cooled, and the heat dissipation efficiency is improved. The temperature of the insulating oil is further reduced, and the situation that the insulating oil is decomposed to generate a large amount of gas to damage the shell of the power taking device under the action of long-time high temperature and high electric field intensity is avoided.
Owner:STATE GRID HUBEI ELECTRIC POWER CO

Transformer neutral point protection device based on built-in capacitive voltage divider

The invention discloses a transformer neutral point protection device based on a built-in capacitive voltage divider, which comprises a maintenance switch, a lightning arrester, a discharge unit, a signal processing module and a gap overcurrent protection current transformer, and is characterized in that the discharge unit comprises a sleeve, a connecting conductor, a contact seat, the built-in capacitive voltage divider, a first cylinder, a second cylinder, a discharge gap and a basin-type insulator; the top of the sleeve is connected with a transformer neutral point, the bottom is connected with the first cylinder, and the basin-type insulator is connected between the first cylinder and the second cylinder; the built-in capacitive voltage divider is arranged on the inner wall of the first cylinder body, the discharge gap is arranged in the second cylinder body, the built-in capacitive voltage divider and the discharge gap are both connected with the signal processing module, and the discharge gap is connected with the gap overcurrent protection current transformer; the top end of the connecting conductor is fixedly connected with the inner top of the sleeve, and the bottom end is inserted into a contact seat in the first cylinder. The contact seat is fixedly connected with the basin-type insulator. Discharge gap misoperation caused by external factors can be effectively avoided, and the reliability of the protection device is improved.
Owner:HAIBEI POWER SUPPLY COMPANY STATE GRID QINGHAI ELECTRIC POWER +2

Capacitive voltage transformer with transient overvoltage measurement function

PendingCN123029240ACapacitanceOvervoltage
The application relates to a capacitive voltage transformer with a transient overvoltage measurement function, comprising a capacitive voltage divider, an electromagnetic unit and a secondary terminal block; the capacitive voltage divider comprises a high-voltage capacitor, a medium-voltage capacitor and a transient overvoltage measurement module, the high-voltage capacitor, the medium-voltage capacitor and the transient overvoltage measurement module are connected in series from top to bottom, and the high-voltage capacitor, the medium-voltage capacitor and the transient overvoltage measurement module all adopt the same insulating medium; one end of the transient overvoltage measurement module away from the medium-voltage capacitor is connected with the secondary terminal block to form a transient measurement loop; the intermediate voltage of the medium-voltage capacitor is led out and connected with the first end of an intermediate transformer in the electromagnetic unit, and a plurality of groups of secondary windings of the intermediate transformer are connected with the secondary terminal block to form a power frequency measurement loop; by adopting the same insulating medium for the high-voltage capacitor, the medium-voltage capacitor and the transient overvoltage measurement module, it is ensured that the three have the same temperature coefficient, and thus the voltage measurement precision is improved.
Owner:CHINA ELECTRIC POWER RES INST WUHAN BRANCH +1

Intelligent closed neutral point protection device for transformer

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.
Owner:HAIBEI POWER SUPPLY COMPANY STATE GRID QINGHAI ELECTRIC POWER +2

Inter-end operation impact test device of high-voltage resistor

The utility model provides an end-to-end operation impact test device for a high-voltage resistor. The end-to-end operation impact test device is mainly used for solving the technical problem that an existing impact voltage generator cannot carry out an end-to-end operation impact test on the high-voltage resistor. The circuit comprises a wave tail resistor, a main capacitor, a wave head resistor, a wave head capacitor, a capacitive voltage divider and a wave modulation inductor. Wherein the two ends of the capacitive voltage divider serve as measuring ends, are connected with the high-voltage resistor in parallel and are used for applying rapidly changing high-voltage impact to the two ends of the high-voltage resistor. By adjusting the inductance value, the test device can output a standard waveform meeting the requirement, so that the inter-end operation impact test of the high-voltage resistor with the resistance value is completed.
Owner:XIAN SHENDIAN (JINGYANG) HIGH VOLTAGE ELECTRICAL APPLIANCE CO LTD

A standard capacitance voltage divider for measuring a wide range of voltages and a method of measurement

The application discloses a standard capacitance voltage divider for measuring wide-range voltage and a measuring method. The standard capacitance voltage divider for measuring wide-range voltage comprises an insulating outer cylinder, an electrode module arranged at the upper end inside the insulating outer cylinder and a low-voltage arm module arranged at the bottom outside of the insulating outer cylinder. The electrode module comprises a high-voltage electrode, a low-voltage electrode and a shielding electrode. The high-voltage electrode, the low-voltage electrode and the shielding electrode are coaxially combined. The lower end of the shielding electrode is connected with a lower flange arranged at the bottom of the insulating outer cylinder through a supporting rod. The low-voltage arm module comprises a low-voltage arm external box and a low-voltage arm. The low-voltage arm external box is fixed at the lower end of the lower flange. The low-voltage arm is arranged in the low-voltage arm external box. The wide dynamic voltage can be reliably and accurately measured.
Owner:CHINA ELECTRIC POWER RESEARCH INSTITUTE CO LTD +2

Transistor device having a capacitive voltage divider circuit

A transistor device includes: a substrate; an epitaxial layer stack formed on the substrate, the epitaxial layer stack including a heterojunction between two epitaxial layers having different band gaps, the heterojunction defining a channel region of the transistor device; a source terminal electrically connected to a source region of the epitaxial layer stack; a drain terminal electrically connected to a drain region of the epitaxial layer stack; a gate terminal electrically connected to a gate structure laterally between the source region and the drain region; a substrate terminal electrically connected to the substrate; and a capacitive voltage divider circuit electrically connected between the source region and the substrate. In a blocking state of the transistor device, the capacitive voltage divider circuit is configured to clamp the electric potential of the substrate to a positive value. Additional transistor device embodiments are described.
Owner:INFINEON TECH AUSTRIA AG

Fixing and protecting device for wire and cable high-voltage test

The utility model provides a fixed protection device for a wire and cable high-voltage test, which belongs to the field of wire and cable tests, and comprises a base, a plurality of placing grooves are formed in the base, a generator, an exciting transformer, a reactor and a capacitive voltage divider are respectively mounted in the placing grooves, a support frame is fixedly connected to the upper end face of the base, and the upper end face of the support frame is fixedly connected with a power supply. A mounting groove is formed in the supporting frame, a variable-frequency power source is mounted in the mounting groove, and a winding assembly is mounted on the base. And a fixing assembly. According to the utility model, the reactor and the capacitive voltage divider can be sleeved through the fixing ring, so that the reactor and the capacitive voltage divider are prevented from toppling due to external force, the stability of the device is improved, accidents during high-voltage test are avoided, the safety of the test process is improved, an overlong connecting wire can be wound on the winding roller, and the service life of the device is prolonged. Tediousness when a user installs and disassembles the device due to intertwining of the connecting lines is avoided, and safety accidents can be reduced.
Owner:JIAOZUO HENGKUN POWER CABLE CO LTD

Broadband low-inductance ohmic-capacitive voltage divider for a partial discharge measurement

The invention relates to a broadband low-inductance ohmic-capacitive voltage divider (1) for a partial discharge measurement, having at least one first part (T1) and at least one second part (T2), wherein the first part (T1) and the second part (T2) are connected in series in order to serve as a voltage divider (1), an inductively based partial discharge measuring device (TEL) i. is integrated into the first part (T1) or the second part (T2) or ii. is provided between the first part (T1) and the second part (T2), and the ohmic elements as well as the capacitive elements of the first part (T1) and of the second part (T2) are adapted to one another such that a low-impedance current flow through the partial discharge measuring device at a frequency which differs from the grid frequency and which is higher than 150 KHz is made possible.
Owner:TECHN UNIV DORTMUND

Capacitive level sensor

A capacitive level sensor (10) for measuring the level (H1, H2; H1', ​​H2') of a medium (16) in a container (14), comprising an electrode unit (12) comprising a strip-shaped measuring electrode (22), a strip-shaped counter electrode (24), and a strip-shaped shielding electrode (26, 28, 40), wherein the shielding electrode (26, 28, 40) at least partially surrounds the measuring electrode (22), and a signal processing arrangement (46), characterized in that a first AC voltage source (60) with a predetermined frequency and amplitude is provided, to which the shielding electrode (26, 28, 40) is connected, such that a shielding capacitor (54, 56) formed between the shielding electrode (26, 28, 40) and the measuring electrode (22) 58) has a shielding capacitance that is proportional to the length of the shielding electrode (26, 28, 40), that a second AC voltage source (66) of the same frequency and with a predetermined second amplitude is present,wherein the second amplitude is out of phase with the first amplitude to which the counter-electrode (24) is connected, such that a measuring capacitor (52) formed between the counter-electrode (24) and the measuring electrode (22) has a measuring capacitance that is proportional to the fill level (H1, H2; H1', ​​H2'), that the measuring capacitor (52) and the shielding capacitor (54, 56, 58) are connected to form a capacitive voltage divider, and that the divided measuring electrode voltage (72) applied to the measuring electrode (22) is used to determine the fill level (H1, H2; H1', ​​H2') in the signal processing arrangement (46).
Owner:BALLUFF

Measuring device and measuring method for measuring dropped voltage in optical system, optical system and lithographic system

The invention relates to a measuring device (400) for an optical system (300), comprising: an input node (K1) for receiving a voltage (V2) dropped in the optical system (300); a capacitive voltage divider (410) connectable to the input node (K1) and comprising a series circuit consisting of at least two capacitors (C1, C2) comprising a measurement capacitor (C2) wherein the capacitive voltage divider (410) is designed to provide a measurement voltage (V3) dropped at the measurement capacitor (C2), the measured voltage is lower than the voltage (V2) received at the input node (K1) and is proportional to the voltage (V2) received at the input node (K1); and a controllable first switch (S1) coupled between the input node (K1) and the capacitive voltage divider (410) and designed to connect the capacitive voltage divider (410) to the input node (K1) based on a control signal (SE1).
Owner:CARL ZEISS SMT GMBH

An alternating current withstand voltage test device based on low voltage compensation frequency-locked phase

The utility model discloses a kind of based on low-voltage compensation frequency-locked phase ac withstand voltage test device, including frequency-locked phase power supply, low-voltage compensation circuit, frequency phase synchronous tracking circuit, high-voltage test transformer and test circuit;Frequency-locked phase power supply is connected with the first winding of high-voltage test transformer via low-voltage compensation circuit, and measurement winding is connected with frequency-locked phase power supply via frequency phase synchronous tracking circuit;The second winding of high-voltage test transformer is exported via high-voltage test equipment and disconnecting switch, and voltage transformer is connected between frequency phase synchronous tracking circuit and disconnecting switch.The utility model can effectively reduce the power supply required for test by low-voltage compensation in power supply side, reduce the performance requirement to reactor;Low-voltage side is also provided with measurement winding, can directly measure high-voltage voltage value, without using conventional capacitor voltage divider, reduce cost, also avoid capacitor voltage divider field assembly process, can be directly vehicle-mounted and without unloading field test, improve work efficiency.
Owner:NANJING MUDIAN ELECTRICAL SCI & TECH CO LTD

Device for measuring converter transformer valve side alternating current voltage

The invention discloses a device for measuring a converter transformer valve side AC voltage, and the device comprises a main body unit which is composed of a resistance-capacitance voltage divider and is used for carrying out the voltage division of an AC-DC superposed voltage; and the secondary voltage dividing unit is connected in parallel with a capacitive voltage divider on an output terminal of the resistance-capacitance voltage divider and is used for isolating direct current voltage from the direct current component output by the main body unit. The problem of converter transformer valve side AC voltage measurement is solved.
Owner:CHINA ELECTRIC POWER RESEARCH INSTITUTE CO LTD +1

Low-power, low-resistance bandgap circuit

A circuit is described that includes a resistor and a diode configured to receive a diode current such that a forward voltage appears across the diode. The circuit further includes a switched capacitor voltage divider and a voltage-to-current converter. The switched capacitor voltage divider is connected to the diode and configured to receive the forward voltage and output a scaled voltage that is a fraction of the forward voltage. The voltage-to-current converter is coupled between the switched capacitor voltage divider and the resistor and is configured to provide a resistor current that is proportional to the scaled voltage and inversely proportional to a resistance of the resistor. The circuit also includes a current source configured to provide the diode current as a function of the resistor current.
Owner:INFINEON TECHNOLOGIES AG

Distortion compensation for a switch in an amplifier circuit

An amplifier circuit that includes a capacitor voltage divider that is selectively enabled with a switch. The circuit includes two capacitor banks where the banks are electrically coupled to opposing side terminals of the switch. When the capacitor voltage divider is not enabled, one bank is adjusted to control the gain of the amplifier. When the capacitor voltage divider is enabled, both banks are used to control the gain of the amplifier.
Owner:BV NXP BV

10kV pole-mounted switch primary and secondary fusion voltage and current integrated sensor

The invention discloses a 10kV pole-mounted switch primary and secondary fusion voltage and current integrated sensor, and belongs to the technical field of power system sensing. The sensor adopts a conformal implantable design, an electric field coupling capacitance voltage division type voltage sensing unit and a single-turn through type LPCT are integrated at a pole-mounted switch wire inlet end, and non-contact measurement of voltage and current is realized. The voltage sensing unit optimizes a low-voltage arm circuit through a secondary active capacitive voltage divider, the current sensing unit adopts a single-turn through type LPCT to realize high-precision current acquisition, and the whole body is encapsulated by solid epoxy resin to form a totally-enclosed insulation structure. The problems that a traditional mutual inductor is large in size, low in integration level, complex in insulation and difficult to achieve distributed installation are solved, and the transformer has the advantages of being small in size, integrated, high in insulation and high in reliability. And the requirements of primary and secondary fusion of the 10kV pole-mounted switch and intelligent development of power distribution network equipment on harmonic wave capture, distributed installation and wide-area deployment can be met.
Owner:KUNMING UNIV OF SCI & TECH

Capacitive voltage sensor arrangement with tuning circuit and voltage sensor system

The disclosure relates to a capacitive voltage sensor arrangement for an electrical energy distribution network. The capacitive voltage sensor arrangement includes a first input terminal, a second input terminal, a first sensor output terminal, and a second sensor output terminal. Further, the capacitive voltage sensor arrangement comprises a capacitive voltage divider comprising a primary capacitor arranged between the first input terminal and the first node and a secondary capacitor arranged between the first node and the second input terminal and electrically connected in series to the primary capacitor. The voltage sensor arrangement further includes a tuning circuit arranged between the first node, the second node, the third node, and the fourth node. The second node is connected to the first sensor output terminal, the third node is connected to the second input terminal, and the fourth node is connected to the second sensor output terminal. In addition, the tuning circuit includes only one or more passive components.
Owner:TE CONNECTIVITY SOLUTIONS GMBH +1