542results about "Variable inductances" patented technology

An on-load tap-changer includes: a tap-changer body and a driving mechanism fixed on the tap-changer body. The tap-changer body includes a housing, multiple insulation fixing plates, multiple turntables, each of which includes a sheave and a cam plate, the cam plate of which is rotatably connected to the insulation fixing plate, and the sheave of which is connected to the driving mechanism, multiple vacuum tubes fixed on the multiple insulation fixing plates, and multiple transmission mechanisms, each of which includes a lifting lever and a reverse spring. When the driving mechanism drives the sheave to regulate voltage, the cam plate is synchronously driven to rotate, and then the vacuum tube is driven by the lifting lever and the reverse spring to achieve on / off arc extinction, thereby achieving on-load voltage regulation.

The present disclosure relates to circuits for connecting components of a hydrogen plant to a power grid to power the components in an efficient manner. In one implementation, power-side alternate current (AC) to direct current (DC) converters may be connected to a source power grid without the need for an isolation transformer by providing separate buses between the power-side AC-DC converters and load-side DC-DC converters instead of a shared DC bus between the converters. Other implementations for connecting components of a hydrogen plant to a power grid may include an adjustable transformer, such as a tappable transformer or an autotransformer, to connect any number of auxiliary loads of the plant to the power grid. The adjustable transformer may provide for various types of auxiliary load devices to connect to the power provided by the transformer at the same time, including both three-phase devices and one-phase devices.

The invention discloses an on-load tap-changer gear shifting method and device based on distance measurement, and belongs to the field of on-load tap-changer voltage regulation, and the method comprises the steps: receiving a gear shifting instruction, and obtaining a target gear according to the gear shifting instruction; according to the target gear and a preset distance and gear mapping relation, determining a target moving distance of a moving contact fixing cross rod; the driving motor drives the movable contact piece fixing cross rod to ascend and descend, and the ascending and descending distance is detected in real time through the distance measuring sensor; when the lifting distance is equal to the target moving distance, the motor is stopped, so that the first movable contact piece and the second movable contact piece are in physical contact with a target first static contact and a target second static contact corresponding to the target gear respectively; and the selector switch is driven to act, so that the target first static contact and the first movable contact piece as well as the target second static contact and the second movable contact piece form electrical connection, and gear shifting is realized. Therefore, by implementing the method and the device, the problems of insufficient positioning accuracy and reliability of gear shifting of the on-load tap-changer in the prior art can be solved.

The utility model relates to an inductor, which comprises a magnet and one or more groups of windings arranged in the magnet, and each group of windings comprises a main winding and an auxiliary winding; a through hole is formed in the magnet and penetrates through the first end face and the second end face of the magnet. The main winding and the auxiliary winding of each group of windings are assembled in the through holes; wherein each winding penetrates through the through hole and is arranged in the through hole of the formed magnet in a penetrating manner for assembly, and the two ends of each winding penetrate out of the through hole and are exposed out of the first end face and the second end face of the magnet respectively. After the magnet is formed, the winding is assembled, and the problem that the main winding and the auxiliary winding are conducted due to high-pressure forming is solved.

The invention relates to the technical field of transformers, in particular to an amorphous alloy oil-immersed transformer convenient to dissipate heat, which comprises a transformer body and a tap switch fixedly mounted at the top of the transformer body, a deflector rod is matched with a plurality of grooves, the tap switch and a fixed seat are coaxially arranged, and the fixed seat is fixedly connected with the deflector rod. The device comprises a fixed seat, the top of the fixed seat is in threaded connection with a protective cover, an annular rotating seat is slidably mounted in the fixed seat, an adjusting seat is arranged at one end of the top of the annular rotating seat, a limiting mechanism is arranged in the adjusting seat, and a connecting mechanism is arranged at the end, away from the adjusting seat, of the top of the annular rotating seat. And an adjusting mechanism is arranged in the fixed seat. The transformer has the advantages that the problem that in the prior art, due to the fact that abrasion may occur between the deflector rod and the groove after long-term use, the gap between the deflector rod and the groove is increased, and the possibility that the deflector rod is disengaged from the groove is increased is solved, and normal use of the transformer body is guaranteed.

The application discloses a variable-load super-large capacity dry-type transformer, relates to the related technical field of dry-type transformers, and comprises three groups of main iron core columns and three groups of auxiliary iron core columns, wherein the main iron core column section is provided in a stepped shape, the inside of the main iron core column is stacked by three layers of amorphous alloy strips, the thickness of the middle layer of the three layers of amorphous alloy strips is 1.2-1.5 times that of the two side layers, and the lamination groups in the inside of the auxiliary iron core column are provided with independent lap pieces at the joints. The application realizes uniform magnetic flux density distribution and single-column capacity improvement by combining the stepped section of the three groups of main iron core columns with the magnetic yoke which is thin at the top and thick at the bottom, solves the problems that the single capacity of the traditional dry-type transformer is limited and the whole machine needs to be replaced for capacity expansion, reduces the occupied volume through modular splicing, increases the capacity of a single group of iron core columns, and reduces the no-load loss.

The invention discloses an OLTC topological structure of an electronic soft switching technology and a driving method. In the topological structure, a power supply is connected with a first transformer, the first transformer is connected with a second transformer, and the second transformer is connected with a load; a low-voltage winding of the first transformer is connected with a plurality of taps; the fixed end of the low-voltage winding of the first transformer and each tap are connected with one end of an independent mechanical switch; according to an interval connection mode, the other ends of all the mechanical switches are connected to form two series switch loops, and each series switch loop is connected with an independent electronic change-over switch to form two series circuits; the two electronic change-over switches are connected in parallel, and the second transformer is connected into a series circuit controlled by the two electronic change-over switches respectively. The mechanical switch and the electronic change-over switch are jointly used, so that short-circuit current and surge voltage cannot be generated when the electronic change-over switch performs state switching, and the quality of output voltage waveforms is improved.

The invention discloses a strip-shaped off-circuit tap-changer device which comprises a supporting structure, three phases of static contact assemblies are arranged on the supporting structure, and each phase of static contact assembly is provided with a moving contact assembly. A rack capable of sliding back and forth is arranged in the supporting structure; the moving contact assembly is installed on the rack and can move back and forth along with the rack. A transmission shaft is rotationally mounted on the supporting structure; a gear meshed with the rack is coaxially fixed on the transmission shaft; the gear shifting limiting and locking mechanism comprises a gear indicating board, a handle and a limiting piece. The gear indication board is fixedly arranged on the transformer and arranged outside the transmission shaft in a sleeving mode. A plurality of positioning holes are formed in the gear indication board; the handle is positioned above the gear indication board and is fixed on the transmission shaft; the limiting piece is in threaded connection with the handle, and after the limiting piece is aligned with the positioning hole, the limiting piece spirally moves downwards and is inserted into the positioning hole. The device is simple in structure, stable and reliable in performance, low in manufacturing cost, investment-saving and good in anti-corrosion and moisture-proof performance.

The present disclosure relates to circuits for connecting components of a hydrogen plant to a power grid to power the components in an efficient manner. In one implementation, a power-side alternating current (AC) / direct current (DC) converter can be connected to a source power grid without the need for an isolation transformer by providing a separate bus between the power-side AC / DC converter and the load-side DC / DC converter, instead of a DC bus shared between the converters. Other implementations for connecting components of a hydrogen plant to a power grid may include an adjustable transformer, such as a tap-changing transformer or an autotransformer, for connecting any number of auxiliary loads of the plant to the power grid. The adjustable transformer may accommodate various types of auxiliary load devices for connecting to the power provided simultaneously by the transformer, including both three-phase and one-phase devices.

The invention relates to the technical field of transformers, in particular to an oil-immersed transformer with a tapping regulating switch, which comprises a main oil tank, an iron core is arranged in the main oil tank, a low-voltage winding is arranged around the outer side of the iron core, a high-voltage winding is arranged around the outer side of the low-voltage winding, and the oil-immersed transformer further comprises an auxiliary oil cylinder, the auxiliary oil cylinder is vertically arranged on the rear side of the main oil tank, and a loading and unloading opening is formed in the top of the auxiliary oil cylinder. The whole switch module, including the switch mounting rack, the tap switch and the sealing cover plate, is safely, stably, cleanly and vertically lifted out of the auxiliary oil barrel as a whole through a hydraulic lifting structure formed by the lifting oil cylinder, and meanwhile, the auxiliary oil barrel is communicated with the lifting oil cylinder through the oil way design; oil pumped out from the bottom of the auxiliary oil barrel directly enters the bottom of the lifting oil cylinder to serve as a pushing medium, internal recycling of the oil is achieved, dependence on large hoisting equipment and a large amount of manpower is reduced, and the tap adjusting switch is more flexible and convenient to maintain.

According to the high-low voltage lead structure of the single-machine 48-pulse hydrogen production rectifier transformer, a left device body, a right device body and a self-coupling modulation device body are arranged in an oil tank of the single-machine 48-pulse hydrogen production rectifier transformer, the self-coupling modulation device body is connected with the left device body and the right device body at the phase angle difference of 7.5 degrees, and the self-coupling modulation device body is powered by a grid-side three-phase power source. Power sources of the left transformer body and the right transformer body are output through the self-coupling modulation transformer body, a phase shift phase with the phase angle difference of 7.5 degrees is arranged between the left transformer body and the right transformer body, and four rectifiers with 12 pulses and 15-degree phase difference can be dragged by the valve side of a single 48-pulse rectifier transformer, so that the one-to-four function can be effectively realized, and the power consumption is reduced. Meanwhile, the size and the weight of the system are effectively reduced, the overall manufacturing cost is greatly reduced, and rapid industrialization of green hydrogen is facilitated.

The invention belongs to the technical field of transformer gear calibration, and particularly discloses an oil immersed distribution transformer gear calibration device and method based on dynamic positioning, the calibration device comprises a gear shifting device, and the gear shifting device comprises a position detection circuit board used for detecting the real-time position of a transformer gear; a motor; a transmission assembly is arranged at the output end of the motor and used for controlling the transformer tap switch to rotate to the maximum gear and then rotate towards the first gear. According to the invention, the problem of large gear shifting error is solved, the stability of equipment and the precision of the gear shifting process are improved, and efficient operation of the transformer under different loads and working conditions is ensured.

The invention belongs to the technical field of transformer gear adjusting, and particularly relates to an excitation-free pole-mounted transformer gear adjusting device which comprises a supporting assembly, an execution assembly and a positioning camera, the supporting assembly comprises a base and a supporting rod arranged on the base, and a supporting arm is arranged at the top of the supporting rod; the execution assembly is arranged below the supporting arm and used for adjusting the gear of the transformer, the positioning camera is arranged on the supporting arm and used for calibrating the position of the execution assembly, the supporting rod is a multi-stage telescopic rod, a connecting block is arranged at the top end of the supporting rod, and one end of the supporting arm is fixed to the connecting block. According to the gear adjusting device, screwing-out and resetting of the protective screw cap are achieved through cooperation of the linear sliding rail and the electric rotary clamping jaw, manual climbing operation is not needed, the high-altitude falling risk and the hidden danger of electric shock existing in climbing operation are effectively avoided, and the working efficiency of gear adjusting is improved.

The invention discloses a high-voltage on-load tap switching device, and relates to the technical field of tap switches, and the device comprises a switching mechanism which is used for completing the slitting processing of a high voltage; the driving mechanism provides power for switching of the switching mechanism; according to the invention, through the linkage of the driving mechanism and the recovery mechanism, before the first moving contact is switched, the second moving contact is separated from the second static contact to generate an electric arc, the pressure storage pump is synchronously triggered to release sulfur hexafluoride gas for arc extinguishing, the electric arc is rapidly extinguished by using the characteristics of cooling, deionization and blocking reignition, an arc-free environment is created for the high-voltage switching of the first moving contact, and the high-voltage switching of the first moving contact is realized. After arc extinguishing, a negative pressure pump is triggered through meshing transmission of an inner gear and a rack, sulfur hexafluoride gas in a left cavity is sucked into a recovery tank, rapid gas recovery is achieved, economic losses caused by gas waste are reduced, meanwhile, the risk of equipment aging is reduced, and the service life of equipment is prolonged. The service life of equipment is prolonged.

According to the cottonseed-based natural ester oil insulation transformer box body, a capsule oil conservator is installed at one end of the top of the transformer box body, is filled with cottonseed-based natural ester insulating oil and is communicated with heat dissipation oil in the inner space of the box body through a pipeline; the other end of the box body is provided with an on-load tap-changer; a plurality of finned radiators are respectively mounted on the left and right sides of the box body, and oil pipes of the finned radiators are connected with the interior of the transformer box body to form heat-conducting oil circulation heat dissipation; an oil surface temperature controller and a winding temperature controller are mounted at the end part of the box body; a gas relay and a pressure relief valve are mounted at the top of the box body; an oil drain valve, an oil sample valve and a grounding bolt are installed at the bottom of the box body. The capsule oil conservator has the beneficial effects that the capsule oil conservator can be used for supplementing lost heat-conducting oil into the transformer box body or guiding redundant heat-conducting oil into the capsule oil conservator. The on-load tap-changer can adjust the gear of the winding in the transformer box body; and the heat-conducting oil of the radiator is connected with the heat-conducting oil in the transformer box body to form heat-conducting oil circulating heat dissipation.

The present application discloses a power supply tie transformer, and a regulation and control method therefor. The power supply tie transformer comprises: a multi-phase parallel transformer, a multi-phase series transformer, and a plurality of safety protection auxiliary adjusting devices. Head terminals of the primary side of the multi-phase parallel transformer are all connected to a first line; the secondary side of the parallel transformer is provided with at least one power supply winding and a plurality of asymmetric windings; the power supply winding is connected to a power supply end; the plurality of asymmetric windings are respectively interconnected to the adjacent phase asymmetric windings of the secondary side of the parallel transformer by means of switch bridge arm modules respectively corresponding to the plurality of asymmetric windings to obtain a first electrical quantity; the first electrical quantity is coupled to the primary side of the series transformer by means of the secondary side of the corresponding series transformer; the plurality of safety protection auxiliary adjusting devices are connected in series between the first line and a second line. The present application realizes transmission of electric energy of a first line and a second line to a power supply end, ties the first line and the second line, and realizes mutual electric energy transmission at specified power between the first line and the second line.

The invention relates to a load transfer switch (1) for a load tap changer (2), comprising at least one vacuum interrupter (30), a handling element (50) which is mechanically connected to the vacuum interrupter (30) on a first end (51) and has a roller (53) on a second end (52), a handling body (10) which has a base body (11) and at least one cam (20), wherein the vacuum interrupter (30) is handled via the handling element (50) by the roller (53) being driven over the handling body (10), at least one part (21) of the cam (20) having a higher strength than the base body (11).

The invention relates to the technical field of inductor production equipment, and discloses an inductance value adjusting mechanism which comprises an inductor jig internally containing an inductor, a jig positioning part used for locking and positioning the inductor jig, and a jig adjusting part used for being in transmission connection with the inductor jig to adjust the inductance value of the inductor. The jig positioning part comprises a first base, and a locking assembly and an electric connection assembly are arranged on the first base; the jig adjusting part comprises a second base, a first movable base and a first servo motor are arranged on the second base, and a plurality of sets of screw sleeves used for being in transmission connection with the inductance jig and a plurality of sets of second servo motors used for driving the screw sleeves to rotate are arranged on the first movable base. The inductance value adjusting mechanism has the advantages of being simple in structure, easy and convenient to operate, high in automation degree and good in use convenience, and the production efficiency and the product quality can be effectively improved.

The application discloses a high-voltage load-tap switching device and relates to the technical field of tap switches. The high-voltage load-tap switching device comprises a switching mechanism, a driving mechanism and a recovery mechanism. The switching mechanism is used for completing tap switching of high voltage. The driving mechanism provides power for switching of the switching mechanism. In the application, the second moving contact is separated from the second static contact to generate an electric arc before the first moving contact is switched, and the arc is extinguished by triggering a pressure accumulator pump to release sulfur hexafluoride gas. The sulfur hexafluoride gas has the characteristics of cooling, ion removal and flameout prevention, and the arc is quickly extinguished to create an arcless environment for high-voltage switching of the first moving contact, thereby avoiding ablation of the contact by the arc and improving the safety of equipment operation. After the arc is extinguished, the negative pressure pump is triggered by meshing transmission of the internal gear and the rack to suck the sulfur hexafluoride gas in the left cavity into the recovery tank, so that the gas is quickly recovered. The economic loss caused by waste of the gas is reduced, the risk of equipment aging is lowered, and the service life of the equipment is prolonged.

The invention discloses a flexible standby transformer which comprises an iron core, and a low-voltage winding, a medium-voltage winding, a voltage regulating winding and a high-voltage winding are wound on the iron core. The low-voltage winding serves as the low-voltage side of the transformer, the head end of the low-voltage winding is connected with the tail end of the medium-voltage winding, the head end of the medium-voltage winding is connected with the tail end of the voltage regulating winding and the tail end of the high-voltage winding respectively, and the voltage regulating winding and the high-voltage winding are both multi-tap windings and serve as the medium-voltage side and the high-voltage side of the transformer respectively. The low-voltage winding serves as the low-voltage side, the voltage regulating winding is adopted to regulate the medium voltage of the medium-voltage winding side, the voltage regulating winding serves as the medium-voltage side, the high-voltage winding serves as the high-voltage side, flexible regulation and control of the medium voltage and the high voltage are achieved through multiple taps, and the requirements under various standby working conditions can be met.

To provide a voltage adjusting device that does not need to connect a series circuit including a serial switch and a resistor to a terminal of primary winding.SOLUTION: A voltage adjusting device 1 adjusts an effective value of an AC voltage. A switcher 5 switches a tap to be electrically connected to a specific terminal of primary winding 31 among three taps T1, T2, and T3 which are connected to single winding 40. An effective value of an AC voltage between the taps T1 and T2 is adjusted according to an effective value of an AC voltage between two distribution lines U and V. Two pieces of secondary winding 32 included in two series transformers 3u and 3v are arranged in the middle of the two distribution lines U and V. In the switcher 5, a control unit 53 limits a flow direction of a circuit current flowing through an upper side switch circuit in a flow state into a first direction or a second direction according to a current value of the circuit current flowing through the upper side switch circuit in the flow state.SELECTED DRAWING: Figure 1

The utility model discloses a simple on-load tap-changer switching core assembling structure which comprises a main shaft and a moving contact group. The moving contact group comprises a moving contact support plate, a transition contact, a contact and a resistance plate; the moving contact group sleeves the outer side of the main shaft; the main shaft is a spline shaft; the moving contact support plate is provided with a spline groove, and the spline groove is matched with the spline shaft, so that the moving contact support plate is fixed on the outer side of the main shaft. According to the utility model, a drilling process is canceled on the main shaft, a structure that the spline groove is matched with the spline shaft is adopted, and the moving contact support plate is fixed on the main shaft, so that the strength of the main shaft is ensured, the running reliability of the tap switch is improved, and meanwhile, the body health of operators is ensured.

The invention relates to the technical field of electric power system control, in particular to a phase-shifting transformer, an electric power system and a simulation verification method of the phase-shifting transformer, the phase-shifting transformer comprises an exciting transformer and a series transformer, the exciting transformer comprises a tertiary winding, the series transformer comprises a secondary winding, and the secondary winding comprises a primary winding and a secondary winding. A primary side winding of the exciting transformer is connected to a midpoint of a secondary side winding of the series transformer, the secondary side winding of the exciting transformer is connected to a current-phase line of the secondary side winding, and a tertiary winding of the exciting transformer is connected with a primary winding of the series transformer; voltage regulating switches are arranged on respective windings of the exciting transformer and the series transformer, and advanced regulation or lagging regulation is carried out on the voltage phase of the power system through the voltage regulating switches on the respective windings of the exciting transformer and the series transformer. Therefore, the problems of low adjustment precision, insufficient adjustment flexibility, difficulty in zero-difference adjustment and the like of a traditional phase-shifting transformer in the related technology are solved.

System (200) for operating a load tap changer, wherein the system comprises: a plurality of strands (208, 210), at least one of which is caused to switch from a first tap (202) to a second tap (204) of the load tap changer upon receipt of a tap change signal, each strand having at least one mechanical switch (214, 216) and wherein an electrical connection is established between the first tap (202) or the second tap (204) and a supply terminal (212) of the load tap changer when at least one mechanical switch (214, 216) of at least one of the plurality of strands is opened; and a plurality of semiconductor switches (220, 222, 224, 226), wherein each semiconductor switch (220, 222, 224, 226) is arranged in parallel to the mechanical switches (214, 216) and, in the activated state, provides an electrical connection between the first tap (202) or the second tap (204) and a supply terminal (212) of the load tap changer; and a processing unit (228) configured to selectively activate and deactivate the mechanical switches (214, 216) and the semiconductor switches (220, 222, 224, 226) such that the electrical connection between the at least one tap (202, 204) and the supply terminal (212) is maintained during the transition of the at least one strand (208, 210) from the first tap (202) to the second tap (204) without causing a short circuit between the two taps (202, 204). the processing unit (228) is also configured to: Generating the step switching signal to move at least one strand (208, 210) from the first tap (202) to the second tap (204) when a condition for step switching is met; Generating activation signals for the semiconductor switches (220, 222, 224, 226) when the stage switching signal is generated; and Generating a plurality of deactivation signals for the mechanical switches (214, 216) from at least one strand (208, 210) connected to the first tap (202) when a stage switching condition is met.

The on-load tap changer (100) comprises an input shaft (O1), an output shaft (O2), an input crank portion (1), a connecting rod portion (2), a swing crank portion (3), a first spring (6a), a second spring (6b), an output crank portion (4), a first limiting member (5a) and a second limiting member (5b), and an on switch (10). The swing crank portion (3) comprises a swing side first portion (31) and a swing side second portion (32). The swing side second portion (32) and the swing side first portion (31) sandwich the output shaft (O2). The first spring (6a) is connected with the swing side first portion (31). The second spring (6b) is connected with the swing side second portion (32). The direction of the force acting on the swing side second portion (32) under the action of the second spring (6b) is opposite to the direction of the force acting on the swing side first portion (31) under the action of the first spring (6a).

The invention relates to a power supply device (1) for an electrolyzer (10), wherein the power supply device (1) comprises an input circuit (2) and a power converter (3), the input circuit (2) being configured to be connected to a power source (4) or a power supply network. To improve the power supply device (1), it is proposed that the input circuit (2) be further configured to provide at least two different electrical potentials at contacts (5), the power converter (3) being electrically connected on the input side to at least one of the contacts (5) by means of a respective conductor (6), and the power supply device (1) being configured such that a change in the contact (5) connected to the power converter (3) is effected by reconnecting at least one conductor (6) of the power supply device (1).Furthermore, the invention relates to an electrolysis device comprising such a power supply device (1) and an electrolyzer (10). The invention further relates to a method for controlling such a power supply device (1) or such an electrolysis device (100), wherein the power converter (3) is operated with one of the voltage levels generated by the input circuit, wherein, to change the voltage level, at least one conductor (6) of the power supply device (1) is manually switched from a first contact of the contacts (5) to a second contact of the contacts (5).

This utility model relates to a structure for fixing the on-load switching cable of a distribution transformer, belonging to the field of transformer technology. It includes a distribution transformer with an on-load switching cable mounted on it. A fixing component for limiting the on-load switching cable is provided between the on-load switching cable and the distribution transformer. The fixing component includes either cable fixing assembly I or cable fixing assembly II. Both cable fixing assembly I and cable fixing assembly II include a clamp that is pressed and embedded into the on-load switching cable, and bolts are provided on the clamp for fixing it. This design features a simple structure and good performance. It solves the problem of messy distribution of on-load switching cables on distribution transformers and the resulting safety hazards. The fixing component between the distribution transformer 1 and the on-load switching cable 3 not only achieves the stability and safety of the cable but also improves the flexibility and maintainability of the overall structure, providing a reliable guarantee for practical applications in power engineering.

The invention relates to the technical field of transformer transformation control, in particular to an all-electric melting electric boosting transformer configuration system and method for glass manufacturing. The system comprises a high-voltage input module, a transformer voltage regulation module and a kiln heating module, the high-voltage input module inputs high voltage to the transformer voltage regulation module for voltage regulation and transformation and then directly accesses a kiln heating electrode of the kiln heating module, and the transformer voltage regulation module comprises an input side winding, an iron core and an output side winding. The invention provides a configuration mode for improving the power utilization efficiency of the all-electric melting electric boosting transformer for glass manufacturing, and the configuration mode combines the characteristics of glass production and the characteristics of voltage regulation of glass electric melting power supply, so that the characteristics of effectively reducing the generation of harmonic waves, reducing the overall installed capacity, and being large in voltage regulation range and high in glass type adaptability are achieved.