31results about How to "High dynamic and thermal stability" patented technology

The invention relates to an epoxy-pouring full-insulation solid isolating switch, which comprises an isolation body, a grounded contact, an isolation contact, a middle contact, an isolation moving contact, a driving screw rod, a fixed nut and a driving gear part, wherein the grounded contact and the isolation contact are arranged at two ends of the isolation body respectively, the middle part of the isolation body is provided with the middle contact, the upper end of the isolation contact is connected with a bus contact through a bus-bar, the bus contact is arranged on the top of the isolation body, and the isolation moving contact is always contacted with the middle contact through a watch chain sensing finger. The isolation switch slides between two positions of the middle contact and the isolation contact or the middle contact and the grounded contact to form the conduction or the isolation grounding of the isolating switch. The entire isolating switch is poured into a fully-sealed integral structure with epoxy resin.

The invention discloses a low-voltage combined switch cabinet, which comprises a cabinet body and a framework. Separator plates are arranged in the cabinet body to divide the interior of the cabinet body into a bus chamber, an instrument chamber, a cable chamber, a switch chamber and a function unit chamber. The switch chamber is defined is composed of a stationary unit, a mobile unit, a plug-in unit and a drawer-type unit. Each chamber is provided with a cabinet door. Each cabinet door is rotationally connected with the framework via a zinc-plated rotation shaft type hinge. Each cabinet door is provided with a mechanical interlocking means. The folding edge of each cabinet door is provided with is additionally provided with a rubber sealing strip. Compared with the prior art, the above low-voltage combined switch cabinet can be applied in the fields of power plants, petrochemical industry, metallurgy, power supply for high-rise buildings and the like. The low-voltage combined switch cabinet serves as a power supply system, wherein the three-phase alternating current frequency thereof is 50 Hz/60 Hz, and the rated operating voltage thereof is 380 V/660 V. the low-voltage combined switch cabinet is high in breaking capacity, good in dynamic thermal stability, flexible in electrical solution, convenient in combination, strong in seriation and practicality, novel in structure, and high in protection level.

The invention relates to an SSCB-based coal mine power grid fast fault current limiter which is mainly used for limiting the current of a coal mine power supply network. The fast fault current limiter is connected in series to a power supply line of a coal mine power grid to limit the short-circuit current of the coal mine power grid. The fast fault current limiter comprises a normal flow loop, a fault current limiting circuit, and a fault judging part. The normal flow loop includes a main switch-off loop and an auxiliary switch-off loop. The main switch-off loop adopts a diode bridge rectifier circuit to convert alternating current into direct current for control, and on-off control of the direct-current loop part is realized by an insulated gate bipolar transistor. The auxiliary switch-off loop is a fast switch-off auxiliary loop composed of a resistor, a capacitor and a gate turn-off thyristor, and is used to quickly switch off the normal flow loop. The invention provides an SSCB-based coal mine power grid fast fault current limiter which reduces the short-circuit current in the case of failure to improve the residual voltage of a bus when a coal mine power grid fails and further ensure normal power supply of other lines connected to the bus.

The invention discloses a conducting loop structure of a low-voltage circuit breaker. A static contact is connected with a static contact clamping device which comprises three connecting parts: the left part is of a square structure which has a hole and is connected with a busbar; the right part is of a dual-plate clamping structure which is supported to the middle part, and the static contact is arranged between the dual-plate clamping structure in a revolving mode; the middle part of the static contact clamping device is lower than the left part and the right part; a dynamic contact is connected with a dynamic contact clamping device which comprises a left part and a right part, wherein the left part is of a round head dual-plate clamping structure, and the dynamic contact is arranged between the round head dual-plate clamping structure in a revolving mode; and a square structure of the right part is connected with a heating element which forms an integral structure with an outlet terminal of a tripping system. The whole conducting loop does not have soft connection and welding spots, the cost for switching on or off is lowered effectively, the temperature rise is lowered, the dynamic and thermal stability is enhanced, and the electric life and the mechanical life are prolonged.

The invention discloses a triangular iron core reactor, which comprises three columnar iron cores, coils, an upper yoke iron and a lower yoke iron, wherein the three columnar iron cores are symmetrically arranged in 120 degrees; the coils are wound on the three columnar iron cores respectively; and the upper yoke iron and the lower yoke iron are connected with the three columnar iron cores respectively to form a whole. The three columnar iron cores have a triangular symmetric structure in 120 degrees relative to the centers of the upper yoke iron and the lower yoke iron. Because the triangular iron core reactor consists of the upper yoke iron and the lower yoke iron, the three columnar iron cores distributed in 120 degrees and the columnar iron coils which are connected to form a whole, the three-phase magnetic circuits of the reactor are balanced and symmetric, and the reactor self does not initiate harmonic wave.

The invention relates to a single-phase pouring type combination measuring dry transformer. The single-phase pouring type combination measuring dry transformer comprises a resin case, a current transformer and a voltage transformer, wherein the current transformer is arranged at the upper part of the left end of the resin case; the two terminals of the primary coil of the current transformer are respectively connected to two conducting rods vertically arranged at the left end of the resin case; the voltage transformer is arranged at the lower part of the right end of the resin case; the primary winding of the voltage transformer is connected to any terminal of the primary coil of the current transformer in the resin case; the secondary winding of the voltage transformer is connected to a plug column vertically arranged at the upper part of the right end of the resin case; the winding direction of the primary coil of the current transformer is parallel to the winding direction of the primary winding of the voltage transformer. The single-phase pouring type combination measuring dry transformer is simple in structure, convenient to produce, small in occupied space, large in creep distance, uniform in electric field distribution and high in measuring accuracy, has higher dynamic thermal stability and better overcurrent resistance, and can be suitable for being used in a high-pollution and high-altitude environment.

The invention provides intelligent adjusting device and method for a power grid. The device comprises a transformer tapping winding, two coarse tapping selectors respectively connected with each tapping joint of the transformer tapping winding, fine tapping selectors connected with winding joints of the coarse tapping selectors, and a selector switch for switching to select the coarse tapping selectors or the fine tapping selectors; two contactors of the first coarse tapping selector is connected with one of the contactors of the second tapping selector; one winding contactor of the fine tapping selector is connected with an adjusting tapping joint Q of the second elector; two contactors of the selector switch are respectively connected an regulating tapping joint K of the first tapping selector and one contactor of the fine tapping selector and used for performing coarse and fine adjusting of a transformer by switching the fine tapping contactors and the two coarse tapping selectors.

The invention discloses an energy-saving copper-aluminum composite conductor plug-in busbar in a switchgear, and relates to an energy-saving copper-aluminum composite conductor plug-in busbar trunk system of a low-voltage transmission and distribution line in the switchgear. The busbar comprises a lower cover plate, an upper cover plate and a groove body formed by two side plates arranged between the upper cover plate and the lower cover plate. Opposing upper insulating bracket and lower insulating bracket are arranged in the groove body. The lower insulating bracket is fixedly arranged on the lower cover plate through sealant. A number of evenly spaced bus installation grooves are arranged on the opposite surfaces of the upper insulating bracket and the lower insulating bracket. Buses are arranged in the bus installation grooves. An insulator is arranged between two adjacent buses. Tooth-like heat dissipation fins are arranged on two side plates and the upper cover plate. The busbar provided by the invention has the advantages of simple structure, low cost, good-looking appearance, good heat dissipation, large current carrying capacity, small temperature rise, high dynamic and thermal stability, great fireproof performance, fire resistance and the like.

The invention relates to a tubular bus O-shaped wiring terminal which comprises a locking mechanism, a tubular bus and an O-shaped wiring terminal. The O-shaped wiring terminal comprises a first terminal and a second terminal. The first terminal is provided with a first arc hole. The second terminal is provided with a second arc hole. The first terminal is internally provided with a first pin hole. The second terminal is internally provided with a second pin hole. The locking mechanism comprises an insulated rod, a first nut and a second nut. The tubular bus O-shaped wiring terminal has advantages of high convenience in field mounting, small contact resistance and high heat radiation performance. The tubular bus O-shaped wiring terminal can satisfy a requirement for large-current conveying. According to international patent classification (IPC), the tubular bus O-shaped wiring terminal is classified to the technical field of a power industry. The tubular bus O-shaped wiring terminal can be widely used for connection between various tubular bus wirings and equipment. The tubular bus O-shaped wiring terminal is a necessary power fitting in power transmission and transformation, and furthermore can satisfy a requirement in current conveying by means of a large-current bus.

The invention discloses an SVC-based software running system and a detection method thereof. The SVC-based software running system comprises a three-phase AC generator, an asynchronous motor, a PI stabilizer, a power divider, a three-phase power grid, a compensator admittance calculation module, a PI regulator, a microwave limiter, a power regulator, an SVC system, a filter measurement module anda load circuit, wherein the three-phase AC generator is connected with the asynchronous motor, the asynchronous motor is connected with the PI stabilizer, one end of the PI stabilizer is connected with the power divider, the power divider is connected with the compensator admittance calculation module by means of the three-phase power grid, and a compensator admittance calculation module is connected with the PI regulator and the microwave limiter respectively. The SVC-based software running system and the detection method thereof have the beneficial effects that the detection is more systematic and automatic, the result of the cyclic shunt detection is more precise, various kinds of equipment is convenient to use, and the universality is wide.

The invention discloses a low-voltage power distribution cabinet easy to install. The low-voltage power distribution cabinet comprises a cabinet body and drawer type switch cabinets, wherein a detachable ventilation baffle plate is arranged at the bottom of the cabinet body, heat dissipation groove holes are formed in the detachable ventilation baffle plate, dustproof iron meshes are arranged in the heat dissipation groove holes, an oval groove is formed in each drawer type switch cabinet, a cylindrical handle is connected to the oval groove by a rotation shaft, a display panel is arranged at a right side of the oval groove, controllers in the drawer type switch cabinets are electrically connected with instruments, indication lamps and buttons on an operation panel, a heat sink is arranged on a detachable top cover, and four corners of the detachable top cover are connected with detachable suspension rings by rotation shafts. The low-voltage power distribution cabinet easy to install has the characteristics of high breaking capacity and high dynamic thermal stability, and flexible electrical scheme, combination convenience, high seriation and practicability, novel structure and the like, and can be widely popularized.

The invention discloses an SVC-based acquisition device and system thereof. The SVC-based acquisition device comprises a three-phase AC power generator, an asynchronous motor, an SVC module A, a powerdistributor, a three-phase power grid and an SVC module B. One end of the three-phase AC power generator is connected with the SVC module A. The other end of the three-phase AC power generator is connected with the three-phase power grid. One end of the SVC module A is connected with the power distributor, and the other end of the SVC module A is connected with the asynchronous motor. The other end of the asynchronous motor is connected with the SVC module B. The three-phase power gird is arranged between the SVC module B and the three-phase AC power generator. The beneficial effects of the SVC-based acquisition device and system thereof are that the SVC module A and the SVC module B are additionally arranged the traditional switching virtual line system, and the SVC module A and the SVCmodule B which are composed of a full digital control system of DSP, a BOD protection system, a main reactor, PLC program control, a protection module and an alarm module can realize BOD protection for the main reactor and the thyristor control reactor and can also realize the alarm function so as to be safer and more reliable.

The invention relates to three-phase buses in a switch cabinet. The three-phase buses are formed by adding at least one reinforcement rib to one or two sides of regular rectangular buses, the reinforcement rib is a rectangular, arc-shaped or trapezoid-shaped structure, the manufacturing material of the special-shaped buses is copper, aluminum, aluminum alloy or copper-clad aluminum, if the special-shaped buses are three-phase special-shaped buses in a back delta-shaped structure, a front delta-shaped structure or a step-shaped structure, the special-shaped buses are arranged in the switch cabinet in a staggered mode. According to the three-phase buses, influence of electro-dynamic repulsion force on moving and hot stability of the buses is reduced, moving and hot stability among the buses is effectively improved, great importance is exerted onto safe and reliable operation of electric equipment; a back cross section area of a special-shaped aluminum bar is improved by one times, cost is reduced by 70%,various parameters such as the cross section area, circumference, hot radiation coefficients, weight and cost are all better than those of copper bars in the prior art, and the three-phase buses have wide application prospects.

The invention belongs to the technical field of power distribution equipment, and discloses a direct-acting three-station isolating switch moving contact rotation stopping and positioning device for a gas-insulated switchgear, which comprises an isolating contact bracket, and a switching-on contact bracket and a grounding contact bracket which are arranged on the two sides of the isolating contact bracket, the isolation contact support, the connection contact support and the grounding contact support are all of tubular structures, and the three supports are all provided with fixing faces. A lead screw is arranged between the connection contact support and the grounding contact support, a moving contact is sleeved on the lead screw, and the lead screw penetrates through a pipe cavity of the isolation contact support. The device is simple in structure, good in reliability and low in cost.

The invention relates to a low-voltage fixed electrical cabinet. The electric cabinet comprises a switch cabinet main body, wherein the switch cabinet main body is formed by connecting a plurality ofswitch cabinet units in sequence; each switch cabinet unit is provided with a cabinet door and an instrument door. The upper end and the lower end of the switch cabinet body are provided with a plurality of heat dissipation groove holes. The cabinet door is of a rotating shaft type structure. A mountain-shaped rubber and plastic strip is embedded at the folded edge of each cabinet door; the instrument door is connected with the switch cabinet unit through a plurality of strands of soft copper wires; mounting pieces in the switch cabinet unit are connected in the switch cabinet unit through screws, the plurality of heat dissipation groove holes are formed in the four walls of the switch cabinet main body, a sound insulation layer, an illumination device, a temperature sensor and a humiditysensor are arranged on the inner side of the switch cabinet unit, and a transparent protection cover covers the illumination device. The cabinet is simple in structure, stable in work, low in production cost, good in dynamic thermal stability, convenient to mount and dismount, high in practicability and high in heat dissipation speed, direct collision between the door and the cabinet body can be prevented, the protection grade of the door is improved, the production period is shortened, and the working efficiency is improved.