109results about "Substation earthing arrangements" patented technology

The invention discloses a real-time monitoring and management system of a digital grounding wire, comprising a grounding polar line clamp, a digital grounding wire pile, a grounding wire cabinet, a wireless communication controller, a wireless communication base station, a computer terminal, a database and management software thereof, wherein the digital grounding wire is provided with a groundingpolar line clamp mounting hole, a passive RFID label and a magnetic material; the grounding polar line clamp is provided with the wireless communication controller in which an RFID label reader is arranged, and the outside of the grounding polar line clamp is provided with a lead screw; the lead screw and the grounding wire mounting hole of the digital grounding wire pile are tightly connected. Through the digitization of transformer station grounding wire information, the automatic real-time monitoring and management of transformer station grounding wires can be realized and artificial errorfactors also can be completely eliminated, so that a transformer station operator on duty is clear with the use and storage conditions of the grounding wires at a glance, thereby achieving the goal of preventing the switching-on accident of the grounding; in addition, the real-time monitoring and management system of a digital grounding wire also can provide grounding wire data information for other automation devices, such as digitization transformer stations, transformer station comprehensive automation devices, transformer station microcomputer fail-safe units and the like.

The invention relates to a mobile substation in the substation field. The mobile substation comprises a high-voltage power transformation vehicle and a medium-voltage power distribution vehicle. The medium-voltage power distribution vehicle is equipped with a medium-voltage switchgear, secondary devices, secondary device accessories and a carrier for allowing the secondary devices / the secondary device accessories to be mounted. The medium-voltage power distribution vehicle is equipped with a prefabricated cabin. The medium-voltage switchgear, the secondary devices, the secondary device accessories and the carrier are arranged in the prefabricated cabin. The carrier is formed by secondary device mounting racks arranged in the prefabricated cabin; and the secondary device and the secondarydevice accessories are arranged up and down on the secondary device mounting racks. Compared with the prior art, the electrical components are arranged in the prefabricated cabin, so that the electrical components can be protected better, and integration degree of the medium-voltage power distribution vehicle is higher. Besides, the secondary devices in the prefabricated cabin are arranged vertically, so that height space of the prefabricated cabin is utilized fully, the volume of the prefabricated cabin is allowed to be more compact, and the medium-voltage power distribution vehicle is allowed to walk conveniently.

The invention relates to an early determination method for a substation grounding grid. The method includes the steps: acquiring total fault current and current divider coefficient of the grounding grid and calculating buried short-circuit current; acquiring the size of a station zone of a substation and calculating the total area of the station zone; calculating the minimum section of a grounding body and selecting the shape and the section of the grounding body; calculating and checking the grounding resistance of the grounding body; calculating and checking maximum contact potential and step voltage of the station zone; performing economic and technical comparison on the grounding body meeting requirements to determine the optimal grounding grid design scheme; generating a grounding grid design calculation sheet, an engineering quantity list and an estimation sheet or approximate estimation sheet. The optimal grounding grid design scheme can be early determined, the method effectively solves the problem that a detailed engineering structure and use materials cannot be accurately determined at researchable and preliminary design stages, and an early design method is provided for the substation grounding grid engineering.

The invention discloses a portable pneumatic circuit grounding device of a transformer substation, and relates to a transformer substation circuit grounding device. The portable pneumatic circuit grounding device of the transformer substation comprises a pneumatic mast (1), a switch blade working cylinder (2) and moving contacts (3), wherein the pneumatic mast (1) is formed by connecting and combining multiple levels of air cylinders, the bottom of the lowest level of air cylinder is provided with an air inlet-outlet valve (11), the switch blade working cylinder (2) is fixed to the top of the pneumatic mast (1), the switch blade working cylinder (2) is internally provided with a switch blade transmission rod (4) and a piston (21) connected with the piston, the bottom of the switch blade working cylinder (2) is provided with an air inlet-outlet hose (22), the number of the moving contacts (3) is two, and the moving contacts (3) are arranged at the tops of two clamping arms (51) of a moving contact clamping device (5). The portable pneumatic circuit grounding device of the transformer substation expands the height range of a carried circuit ground lead, extra-high voltage and extra-high voltage outdoor open type electrical equipment with the higher installation height can be grounded reliably, and the portable pneumatic circuit grounding device of the transformer substation is simple in structure, convenient to carry and safe to operate.

The invention discloses a rack transformer for a 10kV distribution network overhead line and an installation method thereof. The rack transformer comprises a transformer, a first telegraph pole and asecond telegraph pole, the telegraph pole I and the telegraph pole II are connected through two first cross arm up and down; a transformer and a distribution box are respectively arranged on the firstcross arms; a second cross arm, a third cross arm and a fourth cross arm are arranged on the upper portion of the first telegraph pole, a fifth cross arm and a sixth cross arm are arranged on the upper portion of the second telegraph pole, the second cross arm, the third cross arm, the fourth cross arm, the fifth cross arm and the sixth cross arm are parallel to one another and are perpendicularto the first cross arms, a high-voltage inlet wire is connected to the second cross arm, a fuse is arranged on the third cross arm, and a lightning arrester is arranged on the fourth cross arm. The cross arm for installing the transformer and the cross arm for installing the high-voltage incoming line are arranged vertically, when the transformer is overhauled, no cross arm obstruction exists above the transformer, hoisting is convenient, the high-voltage inlet wire is arranged on one side of the uppermost portion of the telegraph pole, the low-voltage outlet wire is arranged on the other sideof the lower portion of the telegraph pole, the risk that personnel get an electric shock in the overhauling process of main and auxiliary pole low-voltage lines is effectively reduced, and a good effect is achieved.

The invention discloses a regulation connection type electricity testing grounding ring which comprises a ring and a straight bar, wherein the ring and the straight bar are made of conductor materials, an insulation sheath is arranged outside the ring and the straight bar, the head of the straight bar is connected with a terminal A, and one end of the ring is provided with a grounding dew cell. The regulation connection type electricity testing grounding ring is characterized in that the terminal A is movably connected with an angle regulation plate, a hanging hole is manufactured on the angle regulation plate and is connected with a dropping fuse, the bottom of the ring is connected with a terminal B, and the terminal B is connected with a 10KV three-phase cable or a downlead of a distribution transformer. The product is used for electricity testing grounding and connecting a whole line with a branch line or a user cable. The terminal A is movably connected with the angle regulation plate with flexible and convenient installation. The bottom of the ring is connected with the terminal B, and the 10KV three-phase cable or the distribution transformer can be connected under the condition that a power supply line is not in power cut.

The invention discloses a matching device used during maintenance of high-voltage parallel capacitors in substations, in particular to a special grounding device for high-voltage parallel capacitors in substations. It is mainly composed of the ground pile base and the ground pile body arranged on it. Its structural characteristics are that transition nuts are symmetrically arranged on both sides of the ground pile body, and wing nuts and ground wire joint bolts are respectively arranged outside the transition nuts. The invention has the advantages of safe use and high work efficiency.

The invention discloses a node heating method for ground potential treatment substation equipment. The method comprises the following steps that (1) a ground potential operation de-rusting paint spraying device is firstly provided with rust remover by a ground potential electrician, so that bolts at heating points are sprayed; (2) the bolts at the heating points are removed by a ground potential operation bolt removing tool; (3) the ground potential electrician lifts up a lead end by an insulation operation rod, and polishes the contact surface with a ground potential operation polishing device; and (4) after the contact surface is polished, the lead end is put down, and the bolts are connected again and screwed tightly by the bolt removing tool and a ground potential operation conveying cushion tool. The node heating method for the ground potential treatment substation equipment provided by the invention can be used for performing charged processing on the heating point of the no-load equipment capable of transferring a load, and further can install temporary parallel connecting tools at two ends of the heating point with a load, and thus, the operation range is enlarged and the commonality is enhanced.

The invention relates to a capacitor bank grounding device for a high-voltage assembling capacitor bank, which belongs to a repair and maintenance tool for high-voltage transmission equipment. The capacitor bank grounding device comprises an insulating operating rod; a conducting connecting hook is connected with the front end of the insulating operating rod; the conducting connecting hook is connected with a grounding grip holder through a grounding wire; the insulating operating rod is connected with the conducting connecting hook through a connector; the lower end of the connector is connected with the insulating operating rod; the upper end of the connector is connected with the conducting connecting hook through a stud shaft; and the conducting connecting hook can be rotated by taking the stud shaft as a rotating shaft and can be positioned and fixed in different angular positions through a nut. The device has the advantages that the structure is simple, the operation is convenient, and the device can perform electric discharge on a single capacitor in a whole capacitor bank, thereby greatly reducing the power off time in the examine and repair preparation process.

The invention discloses a transformer station ground current inhibition device and an inhibition method. The device comprises a grounding net of a main transformer of a transformer station and a grounding net of other devices of the transformer station. The grounding net of the main transformer of the transformer station is in electric isolation with the grounding net of other devices of the transformer station. The grounding net of the main transformer of the transformer station comprises several grounding wells and grounding bodies. The grounding bodies are arranged in the grounding wells. The grounding bodies are connected with the neutral point of the main transformer inside the transformer station. A mode that a neutral point grounding net is buried in a well is employed, thus a ground current in a power grid is guided to the underground deep rapidly, further diffusion of the ground current is inhibited, and therefore safety of the power grid is ensured.

The invention discloses a transformer neutral point combination electric equipment, comprising a base which is equipped with an insulation supporting column, a grounding column and a grounding diversion column, wherein the insulation supporting column is equipped with a high-voltage arm and a high-voltage electrode; the high-voltage arm is equipped with a fixed small contact; the grounding column is equipped with a grounding arm and a grounding electrode; the grounding arm is coupled with a grounding sleeve; the grounding sleeve is connected to an opening / closing regulation mechanism; the grounding diversion column is connected to a fixed large contact via a diversion plate; the grounding sleeve is equipped with a movable large contact; the grounding sleeve is passed through the fixed large contact; the end part of the grounding sleeve is correspondingly connected to the fixed small contact; and the movable large contact is correspondingly connected to the fixed large contact. The transformer neutral point combination electric equipment provided by the invention has the advantages that the fixed large contact, the diversion plate and the opening / closing regulation mechanism can be protected by setting a protection cover without changing the position of the diversion plate and the fixed large contact so as to reduce the corrosion caused by the pollutants in the atmosphere to the parts can be reduced, the device is used as a neutral point disconnecting switch; and when the device is in a closed state, the contact resistance of the circuit is more stable.

The invention provides a grounding device of a transformer substation containing inlet and outlet cables. The grounding device comprises cable trench support flat steel, indoor leading flat steel, an indoor grounding main line and overlap region tin coatings, wherein the cable trench support flat steel penetrates through a cable trench support stand column, the indoor leading flat steel is in locked connection with the cable trench support flat steel through a first screw, the indoor grounding main line is in locked connection with the indoor leading flat steel through a first screw, and the overlap region tin coatings are arranged between the cable trench support flat steel and the indoor leading flat steel and between the indoor leading flat steel and the indoor grounding main line. The invention discloses the grounding device of the transformer substation containing inlet and outlet cables and a mounting method of the grounding device. According to the invention, since flat steel or a copper stranded wire is used for connecting the grounding device in a cable structure with a transformer substation grounding network, the grounding device in the cable structure can be used for shunting the transformer substation grounding network, thereby reducing the total ground resistance, further reducing the earth current of the transformer substation grounding network and lowering the contact voltage and step voltage of the transformer substation.

The invention discloses a grounding mechanical locking device for the maintenance test of electric equipment, which comprises a grounding support fixed on a grounding flat iron of a substation, an insulating protective shell and a locking strip provided with a lock hole, and the insulating protective shell is covered on the grounding support The upper part is fixedly connected with the grounding support through the locking bar; the grounding support is provided with a ground threaded hole and a connecting groove for fixing the grounding wire connector; the insulating protective shell is provided with a lock, a locking bar channel and a grounding wire The lock is located at the opening end of the lock bar channel; the lock bar respectively passes through the connecting groove and the lock bar channel and connects the lock buckle and the lock hole correspondingly. Effectively prevent grounding wires from loosening and grounding devices from being misoperated, improve the accuracy of experimental data, and ensure personal and property safety.

The invention discloses a structure of a lightning protection grounding network in the karst area and a manufacturing method thereof. The method comprises the following steps: firstly, digging a deepwell in the area where lightning protection equipment is going to be buried; putting a metal electrode provided with a permeability hole in the deep well; and then, injecting the resistance reducing material from the metal electrode, and enabling the resistance reducing material to enter in the deep well form the permeability hole of the metal electrode to fill the deep well, wherein in the process of digging the deep well, firstly, sampling the geological stratification of the deep well, forming the permeability hole on the metal electrode according to the sampling result of the geological stratification, and enabling the position of the permeability hole on the metal electrode which is put in the deep well to be corresponding to the position of the geological stratification with a rock section. In the process of on-site construction, the invention can use the resistance reducing material to fill the geological section stratification in the karst area, thereby improving the conductingproperty of the geology around the metal electrode, achieving the requirement of the resistance value of a substation grounding network, and obtaining the advantages of simple structure and operation, low cost and the like.

The invention relates to a controller for using a site grounding wire and a method for controlling the site grounding wire, in particular to a device and method for carrying out intelligent alarm on use, homing and use conditions of a site control grounding wire of a power substation. The controller for using the site grounding wire comprises a shell, a movable cover, a relay, a light emitting diode, a stroke switch, a right spring piece and a left spring piece. The invention has the advantages of being reasonable in structure design, avoiding poor grounding and improving safety.

The invention discloses an uninterruptible assembled / disassembled mobile distribution transformer. The distribution transformer, a low voltage distribution box and a wood pole are arranged on a flat car. A high voltage fuse and a high voltage lightning arrester are arranged on the wood pole. The upper end of the high voltage fuse is installed on a high voltage phase line through a high voltage lead and an installing line clamp while the lower end of the high voltage fuse is connected with the upper end of the high voltage lightning arrester and the upper end of a high voltage sleeve of the distribution transformer. The lower end of the high voltage lightning arrester is connected with a grounding device. The upper end of a general switch in the low voltage distribution box is connected with the upper end of a low voltage sleeve of the distribution transformer, and the lower end of the general switch in the low voltage distribution box is connected with each branch switch which is used for being connected with electric equipment. The bottoms of the distribution transformer and the low voltage distribution box are respectively grounded through the grounding device. The distribution transformer can be drawn to field for installation and application along a 10-35kV line requiring power, and can be drawn back to a storeroom to be stored when not used, so that the power demand for agricultural irrigation is guaranteed.

The invention discloses a converting station grounding device which comprises a U-shaped clamp piece, a fixed flat iron screw, a grounding screw and a butterfly-shaped clamp. The U-shaped clamp piece comprises a U-shaped clamp end and an end with a hole. A first screw hole is formed in one clamp branch part of the U-shaped clamp end. The fixed flat iron screw is connected on the U-shaped clamp piece in a sleeved mode through the first screw hole. The end with the hole is provided with a second screw hole. The grounding screw is connected on the U-shaped clamp piece through the second screw hole. A grounding bolt which is used for being connected with a grounding wire is arranged at one end of the grounding screw, and a thread which is used for being connected with the butterfly-shaped clamp in a sleeved mode is arranged at the other end of the grounding screw. According to the converting station grounding device, damage of grounding flat iron and the grounding wire is avoided, and matching problems of the grounding wire are solved.

A side-up fixing device of a weak current ground copper bar comprises a supporting piece (1) and a clamping device (2), wherein a slot mouth is arranged in the center of the bottom of the clamping device (2). The slot bottom is a copper bar placing position (4), clamping device protrusions (8) are arranged on outer sides of a clamping slot (5), and notch grooves which correspond to the clamping device protrusions (8) are arranged at the upper end of the supporting piece (1). Limiting blocking edges (10) are arranged on the inner side of the notch grooves, a round boss (6) is arranged on the outer periphery of the upper end of the supporting piece (1), and the boss (6) is connected with the interior of the clamping slot (5) of the clamping device in a clamped mode. The clamping device protrusions (8) are clamped in the notch grooves. The copper bar can be clamped and fixed through the supporting piece, the structure is simple and the installation is convenient. Electric conduction cross section of the copper bar and the mechanical strength cannot be reduced. Besides, the copper bar can stretch along the axial direction, and deformation along the axial direction caused by temperature change can be absorbed, so the adaptability is strong.

The invention discloses a power station grounding grid and belongs to the electric field. The power station grounding grid includes a grid-side grounding grid and a power station-side grounding grid; the grid-side grounding grid is electrically connected with the grounding point of the neutral point of a step-up main transformer; the grid-side grounding grid is electrically connected with the grounding point of first equipment; the first equipment includes equipment directly connected with a power grid; the power station-side grounding grid is electrically connected with the grounding point of second equipment; the second equipment includes equipment of which the working power source is supplied by a power station; and no electrical connection exists between the grid-side grounding grid and the power station-side grounding grid. With the power station grounding grid adopted, harm to the step-up main transformer of the power station caused by ground current can be reduced, and the security of the power grid and the power station can be improved.

The invention discloses an absorption type grounding circuit and method for reducing grounding impedance. The circuit comprises a grounding grid and a capacitance absorption apparatus. Two ends of the capacitance absorption apparatus are respectively in connection with the grounding grid and a zero potential earth pole. In the method, the capacitance absorption apparatus is in series connection between the grounding grid and the zero potential earth pole. The circuit can improve path conditions of transformer station grounding grid discharge over the ground, absorb shock wave wavefront and reduce grounding impedance, and has the characteristics of excellent grounding effect, low ground potential, convenient installation, reliable operation and low manufacturing cost.

Provided is a grounding grid of an urban full-indoor transformer substation of 220kV. The grounding grid is arranged below each power distribution building in a transformer substation, comprises a horizontal grounding grid I located at -0.8m, and further comprises a horizontal grounding grid II located at -3m to -5m. The horizontal grounding grid I and the horizontal grounding grid II are connected in parallel, and therefore a double-layer horizontal grounding grid is formed. The grounding grid of the urban full-indoor transformer substation of 220kV can effectively reduce the electrical resistivity of the grounding grid.

The invention relates to the technical field of power transmission and transformation, in particular to a 10 kilovolts and below 10 kilovolts busbar electricity testing grounding device. An L-shaped bare metal electricity testing grounding connecting piece of the outdoor busbar electricity testing grounding device enables a piece of straight strip-shaped metal to be made in an L shape and is arranged upside-down on a bus connecting board on one side of a bow-shaped bus of an outdoor full insulation bundle busbar though a bolt, or a top end is straightly welded on the bus connecting board. The bare metal electricity testing grounding connecting piece is grafted on the outdoor full insulation bundle busbar through welding, or arranged on a bridge connection part of the outdoor full insulation bundle busbar, bird troubles can be prevented, and bus antioxygenation can be improved. Meanwhile, electricity testing and grounding wire installation are convenient. The outdoor busbar electricity testing grounding device has high practical value.

The invention discloses a cathodic protection potential detecting system for a transformer substation grounding device and a detecting method of the cathodic protection potential detecting system. Thecathodic protection potential detecting system comprises a cathodic protection test piece, a reference electrode, an alternating current test piece, a front single chip microcomputer, a rear single chip microcomputer, a memory and a signal transmission component, wherein the cathodic protection test piece, the reference electrode and the alternating current test piece are arranged below a to-be-tested grounding device and are electrically connected with the to-be-tested grounding device through a cable; the cathodic protection test piece, the reference electrode and the alternating current test piece are connected with the front single chip microcomputer; the front single chip microcomputer is connected with the rear single chip microcomputer through the signal transmission component; andthe rear single chip microcomputer is connected with the memory. The direct current voltage between the to-be-tested grounding device and the reference electrode and the direct current flowing through the cathodic protection test piece can be measured by the cathodic protection test piece; the alternating current voltage between the to-be-tested grounding device and the reference electrode and the alternating current flowing through the alternating current test piece can be measured through the alternating current test piece, so that the measurement accuracy is ensured, and the service life of the to-be-tested grounding device is prolonged by the measured data.

The invention relates to the technical field of AC distribution networks, and discloses an alternating current filter field arrangement structure with optimized arrangement. An alternating-current filter area power distribution device is arranged in a double-layer wire mode, the upper layer comprises an alternating-current filter first large-group bus and an alternating-current filter second large-group bus, the lower layer comprises an alternating-current filter small-group bus, and the alternating-current filter small-group bus is connected with the alternating-current filter first large-group bus through a down lead. The filter power distribution device is connected with an alternating current filter group bus through a down lead, and the alternating current filter group and the parallel capacitor group are connected with the filter power distribution device through the equipment connecting wires. According to the invention, the equipment type selection is optimized, and a three-column type common static contact isolating switch is adopted, so that the arrangement structure is improved, the lengths of two improved large-group bus frameworks shaped like a Chinese character of tian are shortened. The two rows of frameworks are combined into the same row for arrangement, and a second large-group incoming line of the alternating current filter extends into the center of the alternating current filter field through an GIS device to be connected with a second large-group bus.

The embodiment of the invention discloses a transformer substation temporary wiring anti-misoperation locking system. The system comprises an industrial control host, a communication adapter in communication with a microcomputer, a computer key and various locks, and further comprises a newly-added electric encoding lock matched with a test pen, a first newly-added mechanical encoding lock and a second newly-added mechanical encoding lock, wherein the first newly-added mechanical encoding lock and the second newly-added mechanical encoding lock are matched with a ground wire and a ground rod respectively. The industrial control host comprises a locking logical program of the test pen, the ground wire and the ground rod. The newly-added electric encoding lock comprises a first five-prevention electronic encoding piece generating a first code, the first newly-added mechanical encoding lock comprises a second five-prevention electronic encoding piece generating a second code, and the second newly-added mechanical encoding lock comprises a third five-prevention electronic encoding piece generating a third code; according to the locking logical program, codes displayed by the computer key are matched with the first code, the second code and the third code respectively, and therefore locks which are matched with and correspond to the codes are controlled to be opened and closed. According to the transformer substation temporary wiring anti-misoperation locking system, the ground wire, the ground rod and the test pen can be managed, and therefore the purposes of comprehensive monitoring and temporary ground wire management are achieved.

The invention provides a vertical downlead grounding device for a transformer substation. The vertical downlead grounding device comprises a grounding clamp, a grounding connecting wire and an installing pole, wherein the grounding clamp comprises a wire clamping assembly, a screwing assembly and a damping steering assembly; one end of a rotating rod of the wire clamping assembly is articulated with a clamping plate, an external thread is arranged at the other end of the rotating rod of the wire clamping assembly, and the clamping plate stretches out of a wire clamping shell; a rotating groove is formed in a screwing seat of the screwing assembly, a pin rod is fixed inside the rotating groove, one end of a screwing rod stretches into a cavity, a threaded hole is formed in one end of the screwing rod, the other end of the screwing rod stretches into the rotating groove, a turning hole is formed in the other end of the screwing rod, the pin rod passes through the turning hole, a fixed sleeve sleeves the outside of the screwing seat, and the screwing seat is provided with a rotating bulge; a first connecting plate of the damping steering assembly is fixed with the wire clamping shell, a second connecting plate of the damping steering assembly is fixed with the fixed sleeve, a connecting screw rod is fixed on the second connecting plate, the connecting screw rod passes through the first connecting plate and is matched with a connecting nut; an installing groove is formed in the installing pole; and wiring terminals are arranged at two ends of the grounding connecting wire. The device is firm, so that the risks of high-altitude falling and electric shock are greatly reduced.