CN214899349U - Distribution device, distribution trailer and electric drive system - Google Patents

Abstract

An embodiment of the utility model provides a distribution device, distribution trailer and electricity drive system, this distribution device includes along the first direction in proper order: starting a power supply, a switch equipment room and a tool room, wherein the switch equipment room comprises a power supply incoming line cabinet and a load feed-out line cabinet which are sequentially arranged along the first direction; at least one of the power supply inlet wire cabinet and the load feed-out wire cabinet is a gas insulation switch cabinet, at least one of the cable wiring ends of the gas insulation switch cabinet is provided with a cable crimping copper bar, the gas insulation switch cabinet is matched with the cable crimping copper bar, and a common cold-shrink terminal connector can be adopted to be combined with the cable crimping copper bar subsequently so as to finally realize that an external device is connected to the gas insulation switch cabinet through the cold-shrink terminal connector.

Description

Distribution device, distribution trailer and electric drive system

Technical Field

The embodiment of the utility model provides a distribution device, distribution trailer and electricity drive system are related to.

Background

Along with electrification of well site operation at the present stage, electric energy gradually replaces other energy sources, and electric equipment matched with the process is also generated, for example, electric-driven fracturing equipment is appeared. With the change of power and number of electric equipment, different requirements are placed on the power supply, so that new and higher requirements for miniaturization, maintenance-free, intellectualization, mobility, full working condition and the like are provided for the power distribution device, and various switch cabinets are continuously developed in order to meet the requirements. The gas insulation switch cabinet has excellent insulation performance and excellent cooling arc characteristic due to full-closed gas insulation, the size of the power distribution device is greatly reduced, the weight of the power distribution device is reduced, and the insulation safety and reliability of the power distribution device are improved when the gas insulation switch cabinet is applied to electrical equipment. And meets the use requirements under severe environmental conditions of high altitude, humidity, filth and the like.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an at least embodiment provides a distribution device, and this distribution device includes along the first direction in proper order: starting a power supply, a switch equipment room and a tool room, wherein the switch equipment room comprises a power supply incoming line cabinet and a load feed-out line cabinet which are sequentially arranged along the first direction; at least one of the power supply inlet wire cabinet and the load feed-out wire cabinet is a gas insulation switch cabinet, and a cable crimping copper bar is arranged at a cable wiring end of at least one gas insulation switch cabinet.

For example, in the distribution device provided in at least one embodiment of the present invention, the power inlet cabinet includes a first power inlet cabinet and a second power inlet cabinet; the load feed-out outlet cabinet comprises a first load feed-out outlet cabinet, a second load feed-out outlet cabinet and a third load feed-out outlet cabinet.

For example, in the distribution device provided by at least one embodiment of the present invention, the first power inlet cabinet is the gas insulated switchgear, along the second direction, the cable terminal of the first power inlet cabinet includes a first cable terminal and a second cable terminal that are oppositely disposed, the first power inlet cabinet is configured to connect the first power source through the first cable terminal or the second cable terminal, and the second direction is parallel to the plane between the switchgears and perpendicular to the first direction.

For example, in the distribution device provided by at least one embodiment of the present invention, at least one of the first cable terminal and the second cable terminal is provided with the cable crimping copper bar, and the first power inlet cabinet is configured to be electrically connected to the first power source through the cable crimping copper bar.

For example, in the distribution device provided in at least one embodiment of the present invention, the second power inlet cabinet is the gas insulated switchgear, and along the second direction, the cable terminal of the second power inlet cabinet includes a third cable terminal and a fourth cable terminal that are oppositely disposed, and the second power inlet cabinet is configured to be connected to a second power source through the third cable terminal or the fourth cable terminal.

For example, in the distribution device provided by at least one embodiment of the present invention, at least one of the third cable terminal or the fourth cable terminal is provided with the cable crimping copper bar, and the second power inlet cabinet is configured to be electrically connected to the second power source through the cable crimping copper bar.

For example, in the distribution device provided in at least one embodiment of the present invention, the first load feed-out line cabinet, the second load feed-out line cabinet, and the third load feed-out line cabinet are all the gas-insulated switchgear; the cable wiring ends of the first load feed-out wire cabinet, the second load feed-out wire cabinet and the third load feed-out wire cabinet are respectively provided with a cable crimping copper bar and are respectively configured to be electrically connected with load equipment through the cable crimping copper bars.

For example, in a distribution device provided by at least one embodiment of the present invention, the start-up power supply is configured to provide a standby power supply and a start-up power supply for the first power supply and the second power supply.

For example, at least one embodiment of the present invention provides a power distribution apparatus, wherein the starting power source includes black-start firewood.

For example, at least one embodiment of the present invention provides a power distribution apparatus, further including at least one of a temperature adjustment component and an alarm component disposed in the switchgear cabinet, the temperature adjustment component configured to adjust a temperature of the switchgear cabinet; the alarm part is configured to emit an alarm signal when a fire breaks out.

For example, in a distribution device according to at least one embodiment of the present invention, the tool room is a cable storage room.

For example, in the distribution device provided by at least one embodiment of the present invention, the cable storage room has a plurality of cables and a cable reel, the cables are disposed on the same cable reel, a partition is disposed on the cable reel, the partition separates the cables, and the cable ends of the cables are fixed respectively.

For example, in a distribution device according to at least one embodiment of the present invention, the cable reel is wound and unwound by using a variable-frequency power device.

For example, in the power distribution apparatus according to at least one embodiment of the present invention, the gas filled in the gas insulated switchgear is at least one of sulfur hexafluoride and nitrogen.

For example, the utility model provides an at least embodiment distribution device still includes the busbar voltage transformer cabinet the power incoming line cabinet with all be provided with protective relay in the outgoing line cabinet is presented to the load, the configuration of busbar voltage transformer cabinet is for the power incoming line cabinet with the outgoing line cabinet is presented to the load protective relay provides voltage signal.

For example, in the distribution device provided in at least one embodiment of the present invention, the protection relay is configured to be connected to a switch or a management machine, so as to implement remote monitoring.

The utility model discloses an at least embodiment still provides a distribution trailer, and this distribution trailer includes: any embodiment of the foregoing provides the power distribution device and the movable trailer, wherein the power distribution device is disposed on a carrying surface of the movable trailer.

The utility model discloses an at least embodiment still provides an electricity system of driving, and this electricity system of driving includes: any embodiment of the foregoing provides a power distribution trailer, a first power source, and a load device, wherein the first power source is located on a first side of the power distribution trailer, the load device is located on a second side of the power distribution trailer, and the first side and the second side are opposite sides.

For example, at least one embodiment of the present invention provides an electric drive system, further comprising a second power source located on the mobile trailer and located on a side of the starting power source away from the switchgear cabinet.

For example, in at least one embodiment of the present invention, an electrically driven system is provided, wherein the load device comprises an electrically driven fracturing device.

Drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the drawings of the embodiments will be briefly described below, and it is obvious that the drawings in the following description only relate to some embodiments of the present invention, and are not intended to limit the present invention.

FIG. 1 is a diagram of a single unit operation mode;

fig. 2 is a schematic structural diagram of a power distribution apparatus according to an embodiment of the present invention;

fig. 3A is a schematic structural diagram of a cable terminal of a gas insulated switchgear according to an embodiment of the present invention;

fig. 3B is a schematic structural diagram of a tool room according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a remote device according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a power distribution trailer according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of an electric drive system according to an embodiment of the present invention;

fig. 7 is a schematic diagram of only the first power supply according to an embodiment of the present invention;

fig. 8 is a schematic diagram of an electrical interlock provided in an embodiment of the present invention;

fig. 9 is a schematic diagram of only the second power supply according to an embodiment of the present invention;

fig. 10 is a schematic diagram of a first power supply and a second power supply provided by an embodiment of the present invention; and

fig. 11 is a schematic diagram illustrating that when one load feeding-out cabinet fails, the load feeding-out cabinet is transferred to another load feeding-out cabinet according to an embodiment of the present invention.

Detailed Description

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of "first," "second," and similar terms in the description herein do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

In the field of oil production, electrical power is distributed to electrical equipment at a wellsite using a portable power distribution unit that is placed on a portable trailer. The power distribution device comprises a medium-voltage switch cabinet, and the medium-voltage switch cabinet comprises two types of an air insulation switch cabinet and a gas insulation switch cabinet. The volume ratio of air insulated cabinet is great, owing to receive mobilizable trailer bearing area's restriction, and the operating space of medium voltage switchgear receives very big restriction to need to set up operating space alone. For example, the addition of an operator platform to the side of a mobile trailer, but the need to overlap the corresponding operator platform when operating at different wellsites, complicates the operation. In addition, many well sites all are in the plateau environment, and there are characteristics such as the atmospheric pressure is low, temperature is low, the difference in temperature is big round the clock, absolute humidity is low and sunshine intensity in the plateau environment to can cause very big influence to electrical equipment's insulation, temperature rise and arc extinguishing etc. moreover, electrical equipment still ages easily in the plateau environment. The volume ratio of gas insulated switchgear is less, and it is less to occupy the bearing area of mobilizable trailer, and gas insulated switchgear places back on mobilizable trailer moreover, according to present mobilizable trailer's size, has operating space before the sufficient cabinet to make distribution device's integrated level high, the flexible operation is convenient. In addition, due to the special insulation mode of the gas insulation switch cabinet, the service environment of the gas insulation switch cabinet is not affected by the altitude, and the gas insulation switch cabinet can be suitable for operating environments with various altitudes, so that a power distribution device for distributing electric energy to electric equipment in a well site usually adopts the gas insulation switch cabinet.

For example, because of uncontrollable outdoor environment, the hardening degree of well site ground is different, and the input end and the output end of the gas insulated switchgear are usually combined by a T-shaped cable joint and a T-shaped plug, however, the T-shaped cable joint needs to be coated with grease during plugging and unplugging, the requirement on environmental cleanliness is higher during re-installation, otherwise, dust is difficult to clean when entering the inside of the T-shaped plug, and residual dust may cause arc discharge of the T-shaped cable joint, thereby having potential safety hazard. Moreover, in-process at transportation distribution device, T type cable joint's fixed comparatively difficult, damaged easily, need adopt special terminal adapter to be connected to the wiring end of gas insulated switchgear when equipment lectotype, the utility model discloses an inventor discovers, can change the T type cable joint of gas insulated switchgear into ordinary cable crimping copper bar through the adaptor, follow-up ordinary shrinkage terminal joint and the combination of cable crimping copper bar of can adopting to finally realize that external device is connected to gas insulated switchgear through shrinkage terminal joint, need scribble lubricating grease when the plug that exists at T type joint in the well site like this, high, the fragile problem of fixed difficult in the transportation to the requirement of environment cleanliness factor.

Furthermore, in conventional designs for wellsite operations, the power distribution unit is directly connected to a single power source and then connected to a load device such as an electrically driven fracturing device to form a single unit mode of operation. For example, fig. 1 is a diagram of an operation mode of a single unit, as shown in fig. 1, an external power source 1 is connected to a power distribution cabinet 2, and the power distribution cabinet 2 and a load device 3 are connected to constitute an operation mode of the single unit. However, the single power mode of fig. 1 has problems that one of the following cannot work properly any more: (1) a failure of the external power supply 1, for example, a failure of a gas turbine generator or a diesel generator, or a power grid outage, etc.; (2) a circuit in the distribution cabinet 2 fails; (3) the load device 3 itself malfunctions.

For example, at least one embodiment of the present invention provides a power distribution apparatus, which includes in order along a first direction: starting a power supply, a switch equipment room and a tool room, wherein the switch equipment room comprises a power supply incoming line cabinet and a load feed-out line cabinet which are sequentially arranged along a first direction; at least one of the power supply inlet wire cabinet and the load feed-out wire cabinet is a gas insulation switch cabinet, and a cable crimping copper bar is arranged at the cable wiring end of at least one gas insulation switch cabinet. In this distribution device, can adopt ordinary shrinkage terminal joint to combine with the cable crimping copper bar to be connected to external power source or load equipment to the gas insulated switchgear through ordinary shrinkage terminal joint, need scribble lubricating grease, the requirement height to the environment cleanliness factor, the fixed difficult fragile problem of fixing in the transportation when solving the plug that T type cable joint exists in the well site.

For example, a gas insulated switchgear is a totally enclosed gas insulated electrical device, which includes a circuit breaker, a disconnector, a grounding switch, a transformer, a lightning arrester, a bus, a connector, an outlet terminal, and the like, all of which are enclosed in a metal cabinet, and an insulating gas with a certain pressure is filled in the metal cabinet.

It should be noted that the switchgear room may further include a bus voltage transformer cabinet, and along the first direction, the power supply incoming line cabinet, the load feed-out line cabinet, and the bus voltage transformer cabinet are sequentially disposed, and the bus voltage transformer cabinet may also be a gas-insulated switchgear cabinet. In some embodiments, the components in the busbar voltage transformer cabinet can also be arranged in a power supply inlet cabinet or a load feed-out cabinet, and a busbar voltage transformer cabinet does not need to be arranged separately.

For example, fig. 2 is a schematic structural diagram of a power distribution apparatus according to an embodiment of the present invention. For example, fig. 2 illustrates an example of a switchgear room including a power inlet cabinet, a load feed-out cabinet, and a bus voltage transformer cabinet sequentially arranged along a first direction. For example, as shown in fig. 2, the power distribution device 20 may be disposed on a movable trailer, and the power distribution device 20 sequentially includes, along a first direction a-a', that is, along a direction from a tail to a head of the movable trailer: the power source 22, the switchgear room 23 and the tool room 24 are started, and the switchgear room 23 includes a power source inlet cabinet 231, a load feed-out cabinet 232 and a bus voltage transformer cabinet 233 which are sequentially arranged along a first direction a-a'. At least one of the power supply inlet cabinet 231, the load feed-out outlet cabinet 232 and the bus voltage transformer cabinet 233 is a gas insulated switchgear, and a cable terminal of at least one gas insulated switchgear is provided with a cable crimping copper bar.

For example, the starting power source 22 includes black start firewood or the like. The black start means that after the whole system is stopped due to a fault, the system is completely powered off, is in a full black state, does not depend on other network help, and drives a generator set without self-starting capability by starting the generator set with the self-starting capability in the system, so that the recovery range of the system is gradually expanded, and finally the recovery of the whole system is realized. The black start has the advantages of simple structure, less service power, high starting speed and the like when being used as auxiliary equipment.

For example, as shown in FIG. 2, the power inlet cabinet 231 includes a first power inlet cabinet 2311 and a second power inlet cabinet 2312 to ensure that two external power sources (a first power source and a second power source) can be connected to the switchgear cabinet 23 through the first power inlet cabinet 2311 and the second power inlet cabinet 2312, respectively.

It should be noted that the power inlet cabinet 231 may further include more power inlet cabinets besides the first power inlet cabinet 2311 and the second power inlet cabinet 2312, which is not limited herein.

For example, as shown in FIG. 2, the starting power supply 22, the first power inlet cabinet 2311 and the second power inlet cabinet 2312 are arranged adjacent to each other in sequence to shorten the length of the cable. And can lay along same route, reduce the cost of laying.

For example, when the starting power source 22 is a black start diesel fuel, the starting power source 22 is configured to provide a backup power source and to provide a starting power source for the first power source and the second power source.

For example, the start-up power supply 22 may supply power to auxiliary devices such as a ventilation system and a lubricating oil system as backup power when an external power supply such as the first power supply or the second power supply fails.

For example, fig. 3A is a schematic structural diagram of a cable terminal of a gas insulated switchgear according to an embodiment of the present invention. Referring to fig. 2 and 3A, the first power inlet cabinet 2311 is a gas insulated switchgear, and the cable terminals of the first power inlet cabinet 2311 include a first cable terminal 2311a and a second cable terminal 2311B which are oppositely arranged along a second direction B-B', and the first power inlet cabinet 2311 is configured to be connected to a first power source through the first cable terminal 2311a or the second cable terminal 2311B. The second direction B-B 'is parallel to the plane of the switchgear cabinet 23 and perpendicular to the first direction a-a'.

For example, a first power source may be connected to the first power inlet cabinet 2311 through the first cable terminal 2311a or the second cable terminal 2311b, i.e., both the first cable terminal 2311a and the second cable terminal 2311b are connected to the first power inlet cabinet 2311. When a first power supply is connected to the first power supply inlet cabinet 2311 through the first cable terminal 2311a, it is ensured that current cannot be input to the first power supply inlet cabinet 2311 through the second cable terminal 2311 b; when a first power is connected to the first power inlet cabinet 2311 through the second cable terminal 2311b, it is ensured that no current is input to the first power inlet cabinet 2311 through the first cable terminal 2311 a.

For example, along the second direction B-B', i.e., in a direction parallel to the plane of the switchgear cabinet 23 and perpendicular to the straight line from the starting power source 22 to the tool cabinet 24, the first cable terminal 2311a and the second cable terminal 2311B are oppositely disposed on the first power inlet cabinet 2311, so that it is ensured that the cable on the first power inlet side does not pass through the bottom of the power distribution apparatus according to the change of the position of the first power source, thereby the length of the cable is shortened to better realize the electrical connection, and the power distribution apparatus can be smoothly placed.

For example, the first power source may include an electrical grid, a diesel genset, a gas turbine genset, or other device or apparatus that provides electrical power.

For example, as shown in fig. 3A, at least one of the first cable terminal 2311a and the second cable terminal 2311b is provided with a cable crimp copper bar. When cable crimp copper bars are provided in both the first cable terminal 2311a and the second cable terminal 2311b, the first power inlet cabinet 2311 is electrically connected to the first power source through the cable crimp copper bars of the first cable terminal 2311a or the second cable terminal 2311 b.

For example, as shown in fig. 3A, the second power inlet cabinet 2312 is a gas insulated switchgear, and in the second direction B-B', the cable terminals of the second power inlet cabinet 2312 include a third cable terminal 2312a and a fourth cable terminal 2312B that are oppositely disposed, and the second power inlet cabinet 2312 is configured to be connected to a second power source through the third cable terminal 2312a or the fourth cable terminal 2312B.

For example, the second power source may be connected to the second power inlet cabinet 2312 through a third cable terminal 2312a or a fourth cable terminal 2312b, i.e., the third cable terminal 2312a and the fourth cable terminal 2312b are both connected to the second power inlet cabinet 2312. When a second power supply is connected to the second power supply inlet cabinet 2312 through the third cable terminal 2312a, it is ensured that current cannot be input to the second power supply inlet cabinet 2312 through the fourth cable terminal 2312 b; when the second power is connected to the second power inlet cabinet 2312 through the fourth cable terminal 2312b, it is ensured that no current is input to the second power inlet cabinet 2312 through the third cable terminal 2312 a.

For example, along the second direction B-B', the third cable terminal 2312a and the fourth cable terminal 2312B are oppositely arranged on the second power inlet cabinet 2312, so that the cable on the second power inlet side cannot pass through the bottom of the power distribution device according to the change of the position of the second power source, the length of the cable is shortened to better realize the electrical connection, and the power distribution device can be stably placed.

For example, the second power source may include an electrical grid, a diesel genset, a gas turbine genset, or other device or apparatus that provides electrical power.

For example, when the first power supply fails, the second power supply may also be incorporated under conditions that satisfy contemporaneous paralleling in order to guarantee a sequential shutdown of the operating process.

For example, as shown in fig. 3A, at least one of the third cable terminal 2312a and the fourth cable terminal 2312b is provided with a cable crimp copper bar. When cable crimp copper bars are provided in both the third cable terminal 2312a and the fourth cable terminal 2312b, the second power inlet cabinet 2312 is configured to be electrically connected to a second power source through the cable crimp copper bars in the third cable terminal 2312a or the fourth cable terminal 2312 b.

For example, as shown in fig. 3A, the load feed-out cabinet 232 includes a first load feed-out cabinet 2321, a second load feed-out cabinet 2322, and a third load feed-out cabinet 2323.

It should be noted that the load feed-out line cabinet 232 may further include other load feed-out line cabinets besides the first load feed-out line cabinet 2321, the second load feed-out line cabinet 2322, and the third load feed-out line cabinet 2323, which is not limited herein.

For example, the first, second, and third load feeding and outputting cabinets 2321, 2322, and 2323 are all gas-insulated switch cabinets, and at least one cable terminal of the first, second, and third load feeding and outputting cabinets 2321, 2322, and 2323 is provided with a cable crimping copper bar.

For example, in one example, the cable terminals of the first, second and third load feed-out cabinets 2321, 2322 and 2323 are all provided with cable crimping copper bars. The first, second, and third load feed-out outlet cabinets 2321, 2322, and 2323 are respectively configured to be electrically connected to the load device 232 through a cable crimping copper bar.

For example, when there is one load device, any one of the first load feed-out line cabinet 2321, the second load feed-out line cabinet 2322 and the third load feed-out line cabinet 2323 may be connected to the load device, the unconnected load feed-out line cabinet serves as a standby load feed-out line cabinet, and when there is a line fault at the connected load feed-out line cabinet, the unconnected load feed-out line cabinet may be connected to any standby load feed-out line cabinet.

For example, when there are two load devices, any two of the first load feed-out line cabinet 2321, the second load feed-out line cabinet 2322, and the third load feed-out line cabinet 2323 may be connected to the load device 232, the unconnected load feed-out line cabinet serves as a standby load feed-out line cabinet, and when there is a line fault at the connected load feed-out line cabinet, the unconnected load feed-out line cabinet may be connected to the standby load feed-out line cabinet.

For example, as shown in fig. 3A, the power distribution apparatus 20 further includes a temperature adjustment component 234 disposed in the switchgear cabinet 23, the temperature adjustment component 234 configured to adjust the temperature of the switchgear cabinet 23. If the temperature adjustment component 234 is not disposed in the switchgear room 23, when the power distribution apparatus 20 is in a high temperature environment in summer, the switchgear room 23 can only be used by reducing the capacity, and the temperature adjustment component 234 can ensure that the temperature in the switchgear room is maintained in a constant proper range, so that the switchgear room 23 is not affected by the temperature rise, and the capacity reduction of the switchgear room 23 is not caused.

For example, the power distribution apparatus 20 further includes an alarm part 235 provided in the switchgear room 23, the alarm part 235 being configured to emit an alarm signal when a fire occurs. When a fire disaster occurs, a fire alarm signal can be received in an instrument prying or manned control room and the like at the first time, and emergency accidents are timely processed.

For example, fig. 3B is a schematic structural diagram of a tool room according to an embodiment of the present invention, and as shown in fig. 3B, the tool room 24 is a cable storage room. The cable storage compartment has a plurality of cables 242 and a cable reel 241, for example, 6 sets of cables in fig. 3B. The plurality of cables 242 are provided on the same cable reel 241, and separators 243, for example, 10 separators in fig. 3B, are provided on the cable reel 241. The partition 243 spaces the plurality of cables 242 apart and fixes the cable terminals 244 of the plurality of cables 242, respectively. For example, in fig. 3B, 6 sets of cables are respectively positioned in the storage areas defined by the partitions, and two adjacent sets of cables have a spacing area therebetween that facilitates securing the cable terminations 244 of the plurality of cables 242 to the partitions 243, respectively.

For example, the cable reel 241 employs an inverter power unit to reel the cable 242 and control the speed of the reel of the cable 242.

For example, the gas filled in the gas insulated switchgear is sulfur hexafluoride (SF)₆) And nitrogen (N)₂) At least one of (a). When the gas filled in the gas insulated switchgear is sulfur hexafluoride (SF)₆) And high-purity sulfur hexafluoride gas has good insulation and arc extinguishing performance, so that the breaking capacity and safety of the gas insulation switch cabinet can be ensured.

For example, fig. 4 is a schematic diagram of a remote device according to an embodiment of the present invention, a protection relay 31 is disposed in each of the power input cabinet 231 (including the first power input cabinet 2311 and the second power input cabinet 2312) and the load feeding-out cabinet 232 (including the first load feeding-out cabinet 2321, the second load feeding-out cabinet 2322, and the third load feeding-out cabinet 2323), and the bus voltage transformer cabinet 233 is configured to provide a voltage signal for the protection relay 31 of the power input cabinet 231 and the load feeding-out cabinet 232. The protection relay 31 has the protection functions of quick break, overcurrent, overload, overvoltage and the like, current signals required by the protection relay 31 come from current transformers in the power supply incoming line cabinet 231 and the load feed-out line cabinet 232, voltage signals come from bus voltage transformers, the protection relay 31 judges whether corresponding loops are normal or not by detecting the abnormity of the incoming current and the voltage signals, if a fault occurs, the protection relay 31 sends a tripping signal to open a circuit breaker, so that the fault loop is cut off, the normal operation of the non-fault loop is guaranteed or the accident range is prevented from being enlarged, and the function of protecting the connecting equipment is achieved.

For example, the protection relays 31 in the power inlet cabinet 231 and the load outlet cabinet 232 are connected to the switch 32 or the management machine 33 for remote monitoring. The specific process is as follows: each protection relay 31 is provided with an RJ45 or RS485 communication interface, the RJ45 of each protection relay 31 is connected to the switch 32 through a network cable or connected to the supervisor 33 through the communication interface RS485 and then connected to a PLC or a microcomputer monitoring device, so that the remote monitoring and control of the states of the power inlet cabinet 231 and the load outlet cabinet 232 are realized, and the unattended function is realized.

For example, the distribution device adopts a single bus or a single bus breaking mode to realize the functions of collecting electric energy and distributing electric energy.

For example, the power distribution apparatus 20 may be used for connection between medium voltage electrical equipment used in oilfield wellsite operations and an external power source, such as a power grid, gas turbine generator, diesel generator, or other various devices or equipment providing electrical power, and the power distribution apparatus 20 may be used in electrically driven fracturing sites, or in electrified oilfield wellsites.

An embodiment of the present invention further provides a power distribution trailer, for example, fig. 5 is a structural schematic diagram of a power distribution trailer provided by an embodiment of the present invention, as shown in fig. 5, the power distribution trailer 40 includes a movable trailer 11 and a power distribution device 20 provided by any of the above embodiments, and the power distribution device 20 is disposed on a carrying surface of the movable trailer 11. Along the direction from the tail to the head of the mobile trailer 11, i.e. along the first direction a-a', the power distribution device 20 comprises in sequence: the power source 22, the switchgear room 23 and the tool room 24 are activated, and the switchgear room 23 includes a power inlet cabinet 231 and a load outlet cabinet 232 which are sequentially arranged along a first direction a-a'. At least one of the power supply inlet wire cabinet 231 and the load feed-out wire cabinet 232 is a gas insulation switch cabinet, and a cable terminal of at least one gas insulation switch cabinet is provided with a cable crimping copper bar.

It should be noted that the switchgear room 23 may further include a bus voltage transformer cabinet 233, and the power supply input cabinet 231, the load feed-out cabinet 232, and the bus voltage transformer cabinet 233 are sequentially arranged along the first direction a-a', where the bus voltage transformer cabinet 233 may also be a gas-insulated switchgear cabinet. In some embodiments, the components in the busbar voltage transformer cabinet 233 can also be disposed in the power inlet cabinet 231 or the load outlet cabinet 232, without separately disposing a busbar voltage transformer cabinet.

For example, the starting power source 22 may be placed directly above the wheels of the mobile trailer 11 near the rear of the vehicle, due to the large weight of the starting power source 22, the small number of external wires, and the need for frequent movement. The tool compartment 24 is relatively light and typically houses a cable reel on which the cable is wound, and positioning the tool compartment 24 at the head of the mobile trailer 11 facilitates connection of the cable to external equipment. The switchgear room 23 is disposed between the starting power source 22 and the tool room 24, so that incoming and outgoing lines can be facilitated, and the power distribution device 20 has both convenience in use and weight distribution.

An embodiment of the present invention further provides an electric driving system, for example, fig. 6 is the present invention provides an embodiment of an electric driving system, as shown in fig. 6, the electric driving system 50 includes the power distribution trailer 40, the first power source 411 and the load device 42 in any of the above embodiments, and the power distribution device 20 is disposed on the carrying surface of the movable trailer 11. The first power source 411 is located on a first side of the power distribution trailer 40 and the load device 42 is located on a second side of the power distribution trailer 40, the first and second sides being opposite sides.

For example, along the extension of the load-bearing surface of the distribution trailer 40, i.e., along the direction from the starting power source 22 to the tool room 24, the first side of the distribution trailer 40 is the left side of the load-bearing surface of the distribution trailer 40, and the second side of the distribution trailer 40 is the right side of the load-bearing surface of the distribution trailer 40. For example, the electric drive system further includes a second power source 412, the second power source 412 being located on the mobile cart 11 on a side of the starting power source 22 remote from the switchgear cabinet 23.

For example, the above-described arrangement of the electric drive system 50 may allow the electric drive system 50 to be more compact to reduce the length of the cable used.

It should be noted that the first power source 411 and the load device 42 may also be located on the same side of the power distribution trailer 40, and are not limited herein.

For example, as shown in fig. 6, the first power source 411 and the second power source 412 may be devices or apparatuses that supply electric energy, such as a power grid, a gas turbine generator, and a diesel generator, respectively, and the first power source 411 is a gas turbine generator and the second power source 412 is a diesel generator, for example, as described below.

For example, the load device 42 may include a first load device 421 and a second load device 422. The first and second load devices 421 and 422 may each be an electrically driven fracturing device or the like.

For example, along the direction from the tail to the head of the mobile trailer 11, i.e. along the first direction a-a', the power distribution device 20 comprises in sequence: the method comprises the steps that a power supply 22, a switchgear room 23 and a tool room 24 are started, the switchgear room 23 comprises a power supply inlet cabinet 231, a load feed-out outlet cabinet 232 and a bus voltage transformer cabinet 233 which are sequentially arranged along a first direction A-A', at least one of the power supply inlet cabinet 231, the load feed-out outlet cabinet 232 and the bus voltage transformer cabinet 233 is a gas insulation switchgear, and a cable crimping copper bar is arranged at a cable terminal of at least one gas insulation switchgear. The power supply 41 is configured to be electrically connected to the power inlet cabinet 231.

For example, in the general structure of an electric drive system, usually a T-cable connector and a T-plug of a gas-insulated switchgear cabinet are combined, the inventors of the present invention noted that: the gas insulated switchgear adopts T-shaped cable joint, the air insulated switchgear adopts cable crimping copper bar cable joint, the width of the gas insulated switchgear is much smaller than that of the air insulated switchgear, the equipment does not need to be frequently disassembled after one-time installation, the service environment is clean, but the operation working condition of a well site needs to be frequently assembled and disassembled, the external environment is mostly dust, sand, gravel and the like, and the T-shaped cable joint cannot meet the requirement, therefore, the common cold-shrink terminal joint can be adopted to be combined with the cable crimping copper bar, after the T-shaped cable joint is changed into the cable crimping copper bar through the cable terminal adapter in the gas insulated switchgear, the external power supply or load equipment can be connected to the gas insulated switchgear through the common cold-shrink terminal joint, so that the problems that lubricating grease needs to be coated during plugging and unplugging of the T-shaped cable joint in the well site, the problem that the lubricating grease needs to be coated, and the oil is not used in the well site is not used in the prior art are solved, High requirement on environment cleanliness and difficulty and vulnerability in fixation during transportation.

For example, as shown in fig. 6, the power inlet cabinet 231 includes a first power inlet cabinet 2311, the first power inlet cabinet 2311 is a gas insulated switchgear, and the power source 41 includes a first power source 411. Referring to fig. 3A and 6, along a second direction B-B 'parallel to the plane of the switchgear cabinet 20 and perpendicular to the first direction a-a', the cable terminals of the first power inlet cabinet 2311 include a first cable terminal 2311a and a second cable terminal 2311B oppositely disposed, and the first power inlet cabinet 2311 is connected to the first power supply 411 through the first cable terminal 2311a or the second cable terminal 2311B.

For example, as shown in fig. 3A and 6, at least one of the first and second cable terminals 2311a and 2311b is provided with a cable crimp copper bar through which the first power inlet cabinet 2311 is electrically connected with the first power supply 411.

For example, as shown in connection with fig. 3A and 6, the power inlet cabinet 231 further includes a second power inlet cabinet 2312, the second power inlet cabinet 2312 is a gas insulated switchgear, and along the second direction B-B', the cable terminals of the second power inlet cabinet 2312 include a third cable terminal 2312a and a fourth cable terminal 2312B that are oppositely disposed, and the second power inlet cabinet 2312 is configured to be connected to the second power source 412 through the third cable terminal 2312a or the fourth cable terminal 2312B.

For example, as shown in fig. 3A and 6, at least one of the third cable terminal 2312a or the fourth cable terminal 2312b is provided with a cable crimp copper bar, and the second power inlet cabinet 2312 is electrically connected with the second power supply 412 through the cable crimp copper bar.

For example, as shown in fig. 3A and fig. 6, the load feed-out line cabinet 232 includes a first load feed-out line cabinet 2321, a second load feed-out line cabinet 2322, and a third load feed-out line cabinet 2323, the first load feed-out line cabinet 2321, the second load feed-out line cabinet 2322, and the third load feed-out line cabinet 2323 are all gas-insulated switch cabinets, and cable terminals of the first load feed-out line cabinet 2321, the second load feed-out line cabinet 2322, and the third load feed-out line cabinet 2323 are all provided with cable crimping copper bars and are respectively configured to be electrically connected to the load device 42 through the cable crimping copper bars.

For example, a gas insulated switchgear is a totally enclosed gas insulated electrical device, which includes a circuit breaker, a disconnector, a grounding switch, a transformer, a lightning arrester, a bus, a connector, an outlet terminal, and the like, all of which are enclosed in a grounded metal cabinet, and an insulating gas with a certain pressure is filled in the metal cabinet.

For example, other related structures of the power distribution device in the electric drive system can be referred to the related description of the power distribution device, and are not described herein again. The power distribution unit in an electric drive system may also include alarm components, temperature regulation components, and components to enable remote monitoring.

For example, at least one embodiment of the present invention further provides an operating method of an electric drive system, the electric drive system further comprising a second power source 412, the power inlet cabinet 231 comprises a first power inlet cabinet 2311 connected to the first power source 411 and a second power inlet cabinet 2312 connected to the second power source 412, the first power source 411 comprises a first generator outlet switch 52G1 and a first synchronization device 251, the first power inlet cabinet 2311 has a first power inlet circuit breaker 51M1 therein, the second power source 412 comprises a second generator outlet switch 52G2 and a second synchronization device 252 therein, the second power inlet cabinet 2312 has a second power inlet circuit breaker 52M2 therein, the operating method comprising: at least one of the first power supply 411 and the second power supply 412 is operated. For example, the first power supply 411 is connected to circuitry in the first power inlet cabinet 2311, and the second power supply 412 is connected to circuitry in the second power inlet cabinet 2312. In actual operation, the following situations may exist: (1) only the first power supply 411 operates normally, and the second power supply 412 is in a non-operating state; (2) only the second power supply 412 operates normally and the first power supply 411 is in a non-operating state.

For example, fig. 7 is a schematic diagram of only the first power supply provided by an embodiment of the present invention, as shown in fig. 7, the first power supply 411 is connected to and electrically communicated with a circuit in the first power inlet cabinet 2311, and the second power supply 412 is not communicated with a circuit in the second power inlet cabinet 2312, so that only the first power supply 411 provides an external power supply. Fig. 8 is a schematic diagram of an electrical interlock according to an embodiment of the present invention. For example, as shown in fig. 7 and 8, the power-on process in which only the first power supply 411 operates is as follows: the first generator egress switch 52G1 is in the open state, closing the first power inlet line breaker 52M1, and then the first generator egress switch 52G1 is concurrently closed by the first synchronization device 251.

For example, fig. 9 is a schematic diagram of supplying power by only the second power source according to an embodiment of the present invention, as shown in fig. 9, for the case that only the second power source 412 works normally, the first power source 411 is in a non-working state: the second power source 412 is connected to and in electrical communication with circuitry in the second power inlet cabinet 2312, and the first power source 411 is not in communication with the circuitry in the first power inlet cabinet 2311, so that only the second power source 412 provides external power. Similarly, with reference to fig. 8 and 9, the process of switching on and supplying power when only the second power supply 412 is in operation is as follows: the second generator outlet switch 52G2 is in the open state, closing the second power inlet circuit breaker 52M2, and then the second generator outlet switch 52G2 is synchronously closed by the second synchronization device 252.

If the working power supply (the first power supply 411 or the second power supply 412) suddenly stops working, the other power supply in a non-working state can be quickly switched to, and the normal stop or the normal working of the work is ensured.

In actual operation, poor working conditions may occur, and if the capacity of any one of the first power supply 411 and the second power supply 412 cannot meet the operation requirement on the site, the first power supply 411 and the second power supply 412 need to be rapidly used in parallel, and the first power supply 411 and the second power supply 412 after being connected in parallel jointly supply power to the load device so as to meet the power supply requirement. For example, fig. 10 is a schematic diagram of the two power supplies supplying power together according to an embodiment of the present invention, because the non-synchronous parallel-closing may cause irreversible damage to the bodies of the first power supply 411 and the second power supply 412 when short-circuit fault occurs, the non-synchronous parallel-closing of the first power supply 411 and the second power supply 412 can be realized through the electrical interlock between the first power supply incoming line cabinet 2311 and the second power supply incoming line cabinet 2312 in the switchgear room 23, so as to prevent the non-synchronous parallel-closing from occurring, for example, as shown in fig. 8 and fig. 10, the process of the non-synchronous parallel-closing power transmission of the first power supply 411 and the second power supply 412 is: the closed state of the first power incoming line breaker 52M1 is connected in series in the closing loop of the first power outgoing line breaker 52G1, the open state of the first power outgoing line breaker 52G1 is connected in series in the closing loop of the first power incoming line breaker 52M1, the closed state of the second power incoming line breaker 52M2 is connected in series in the closing loop of the second power outgoing line breaker 52G2, and the open state of the second power outgoing line breaker 52G2 is connected in series in the closing loop of the second power incoming line breaker 52M2, so that the electric interlocking loop ensures the reliability of the operation sequence.

In actual practice, the following situations may also occur: (1) in the process that the first power supply 411 and the second power supply 412 both work normally, the first power supply 411 stops working suddenly; (2) in the process that both the first power supply 411 and the second power supply 412 normally operate, the second power supply 412 suddenly stops operating.

For example, in connection with FIG. 8, the following process may occur for scenario (1) above: the protection fault action firstly trips the first power incoming line breaker 52M1, after the fault is relieved, the first power 411 needs to be connected to a bus of the power distribution device in parallel, the first generator outlet switch 52G1 needs to be separated, then the first power incoming line breaker 52M1 is closed, and the first generator outlet switch 52G1 is closed after the synchronous parallel condition is met through detection of the first synchronization device 251; alternatively, the protection failure operation trips the first generator outlet switch 52G1 first, and after the failure is resolved, the first power supply 411 is connected in parallel to the bus of the distribution apparatus, and the first generator outlet switch 52G1 is closed after the first synchronization device 251 detects that the synchronization parallel condition is satisfied.

For example, in connection with fig. 8, the following process may occur for the above case (2): the protection fault action firstly trips the second power incoming line breaker 52M2, after the fault is relieved, the second power 412 needs to be connected to a bus of the power distribution device in parallel, the second generator outlet switch 52G2 needs to be separated firstly, then the second power incoming line breaker 52M2 is closed, and the second generator outlet switch 52G2 is closed after the synchronous parallel condition is met through detection of the second synchronization device 252; alternatively, the protection failure operation trips the second generator outlet switch 52G2 first, and after the failure is resolved, the second power supply 412 is connected in parallel to the bus of the power distribution apparatus, and the second generator outlet switch 52G2 is closed after the second synchronization device 252 detects that the synchronization parallel condition is satisfied.

For example, fig. 11 is a schematic diagram of an embodiment of the present invention that a load feeding-out line cabinet is shifted to another load feeding-out line cabinet when a fault occurs, where the first load device 421 is connected to a circuit in the first load feeding-out line cabinet 2321, the second load device 422 is connected to a circuit in the second load feeding-out line cabinet 2322, and the third load feeding-out line cabinet 2323 is a standby load feeding-out line cabinet, when the first load feeding-out line cabinet 2321 has a fault, the first load device 421 may be connected to a circuit in the third load feeding-out line cabinet 2323, or, when the second load feeding-out line cabinet 2322 has a fault, the second load device 422 may be connected to a circuit in the third load feeding-out line cabinet 2323. The bus voltage transformer tank 233 also has circuitry therein.

For example, the power input cabinet 231 (including the first power input cabinet 2311 and the second power input cabinet 2312) and the load feed-out cabinet 232 (including the first load feed-out cabinet 2321, the second load feed-out cabinet 2322 and the third load feed-out cabinet 2323) are respectively provided with a protection relay, and the bus voltage transformer cabinet 233 provides a voltage signal for the protection relays of the power input cabinet 231 and the load feed-out cabinet 232. The current signals required by the protective relay come from a current transformer in the power supply inlet wire cabinet 231 and the load feed-out wire cabinet 232, the voltage signals come from a bus voltage transformer, the protective relay judges whether the corresponding loop is normal or not by detecting the abnormity of the accessed current and voltage signals, if the fault occurs, the protective relay sends a tripping signal to open the circuit breaker, so that the fault loop is cut off, the normal operation of the non-fault loop is ensured or the accident range is prevented from being enlarged, and the function of protecting the connecting equipment is achieved.

The embodiment of the utility model provides a distribution device, distribution trailer and electricity drive system has following at least one item beneficial effect:

(1) the utility model discloses an at least embodiment provides a distribution device, change T type cable joint into ordinary cable crimping copper bar, gas insulated switchgear cooperatees with cable crimping copper bar, follow-up ordinary shrinkage terminal joint that can adopt combines with cable crimping copper bar, with finally realize that external device is connected to gas insulated switchgear through shrinkage terminal joint, need scribble lubricating grease when having solved the plug that T type cable joint exists in the well site, high to the requirement of environment cleanliness factor, the fragile problem of fixed difficulty in the transportation.

(2) The utility model discloses an at least embodiment provides a distribution device can guarantee that the cable of external power source incoming line side can not pass through distribution device's bottom according to the change of external power source position to make the length of cable shorten and realize the electricity better and connect, and can make distribution device can steadily place.

(3) The utility model discloses an at least embodiment provides a distribution device, start power supply, first power incoming line cabinet and second power incoming line cabinet adjacent setting in proper order can shorten the length of cable conductor.

(4) The utility model discloses an at least embodiment provides a distribution device, after external power source breaks down, the start power supply can provide the power to auxiliary engine such as ventilation, lubricating oil system to as stand-by power supply.

(5) The utility model discloses the distribution trailer that an at least embodiment provided can remove and use the oil field well site at the electricity and drive the fracturing scene, perhaps electronic operation.

The following points need to be explained:

(1) the embodiment of the present invention is only related to the structure related to the embodiment of the present invention, and other structures can refer to the common design.

(2) In the drawings, which are used to describe embodiments of the invention for purposes of clarity, the thickness of layers or regions are exaggerated or reduced, i.e., the drawings are not drawn to scale.

(3) Without conflict, embodiments of the present invention and features of the embodiments may be combined with each other to arrive at new embodiments.

The above description is only the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (20)

1. An electrical distribution apparatus, comprising in sequence along a first direction: a power source, a switchgear cabinet and a tool cabinet, wherein,

the switch equipment room comprises a power supply incoming line cabinet and a load feed-out line cabinet which are sequentially arranged along the first direction;

at least one of the power supply inlet wire cabinet and the load feed-out wire cabinet is a gas insulation switch cabinet, and a cable crimping copper bar is arranged at a cable wiring end of at least one gas insulation switch cabinet.

2. The electrical distribution apparatus of claim 1, wherein the power inlet cabinet comprises a first power inlet cabinet and a second power inlet cabinet; the load feed-out outlet cabinet comprises a first load feed-out outlet cabinet, a second load feed-out outlet cabinet and a third load feed-out outlet cabinet.

3. The electrical distribution apparatus of claim 2, wherein the first electrical inlet cabinet is the gas insulated switchgear, the cable terminals of the first electrical inlet cabinet include first and second cable terminals disposed opposite each other along a second direction, the first electrical inlet cabinet is configured to connect to a first electrical source through the first or second cable terminals, and the second direction is parallel to a plane in which the switchgear compartments are located and perpendicular to the first direction.

4. The electrical distribution apparatus of claim 3, wherein at least one of the first cable terminal and the second cable terminal is provided with the cable crimp copper bar, the first power inlet cabinet being configured to be electrically connected to the first power source through the cable crimp copper bar.

5. The electrical distribution apparatus of claim 3 or 4, wherein the second electrical inlet cabinet is the gas insulated switchgear, and the cable terminals of the second electrical inlet cabinet comprise oppositely disposed third and fourth cable terminals along the second direction, the second electrical inlet cabinet being configured to connect to a second electrical source through the third or fourth cable terminals.

6. The electrical distribution apparatus of claim 5, wherein at least one of the third cable terminal or the fourth cable terminal is provided with the cable crimp copper bar, the second power inlet cabinet being configured to be electrically connected to the second power source through the cable crimp copper bar.

7. The electrical distribution apparatus of claim 5,

the first load feed-out wire cabinet, the second load feed-out wire cabinet and the third load feed-out wire cabinet are all the gas-insulated switch cabinets;

the cable wiring ends of the first load feed-out wire cabinet, the second load feed-out wire cabinet and the third load feed-out wire cabinet are respectively provided with a cable crimping copper bar and are respectively configured to be electrically connected with load equipment through the cable crimping copper bars.

8. The power distribution apparatus of claim 5, wherein the startup power supply is configured to provide backup power and to provide startup power for the first power supply and the second power supply.

9. The electrical distribution apparatus of claim 8, wherein the startup power source comprises black-start diesel.

10. The electrical distribution apparatus of claim 1, further comprising at least one of a temperature adjustment component and an alarm component disposed in the switchgear cabinet,

the temperature adjustment component is configured to adjust the temperature between the switch devices;

the alarm part is configured to emit an alarm signal when a fire breaks out.

11. The electrical distribution apparatus of claim 1, wherein the tool bay is a cable storage bay.

12. The electrical distribution apparatus of claim 11, wherein the cable storage compartment includes a plurality of cables and a cable spool, the plurality of cables being disposed on the same cable spool, the cable spool having a partition disposed thereon, the partition separating the plurality of cables and securing cable terminations of the plurality of cables, respectively.

13. The electrical distribution apparatus of claim 12, wherein the cable reel employs a variable frequency power device to reel the cable.

14. The electrical distribution apparatus of any of claims 1-4, wherein the gas filled in the gas insulated switchgear is at least one of sulfur hexafluoride and nitrogen.

15. The electrical distribution apparatus of claim 1, further comprising a busbar voltage transformer cabinet, wherein protective relays are disposed in both the power inlet cabinet and the load feed-out cabinet, the busbar voltage transformer cabinet configured to provide voltage signals to the protective relays of the power inlet cabinet and the load feed-out cabinet.

16. The electrical distribution apparatus of claim 15, wherein the protective relay is configured to interface with a switch or supervisor for remote monitoring.

17. A power distribution trailer, comprising: the power distribution device and mobile trailer of any of claims 1-16, wherein the power distribution device is disposed on a load-bearing surface of the mobile trailer.

18. An electric drive system comprising the electrical distribution trailer of claim 17, a first power source, and a load device, wherein the first power source is located on a first side of the electrical distribution trailer and the load device is located on a second side of the electrical distribution trailer, the first side and the second side being opposite sides.

19. The electric drive system of claim 18, further comprising a second power source, wherein the second power source is located on the mobile trailer on a side of the starting power source remote from the switchgear cabinet.

20. The electric drive system of claim 18, wherein the load device comprises an electrically driven fracturing device.

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