CN220527876U - Test power supply generating device - Google Patents

Abstract

The utility model discloses a test power supply generating device, which comprises the following steps: the input ends of the power modules are connected in parallel and then connected with an alternating current power supply; the output ends of the power supply modules are connected in parallel and then output direct current to a direct current bus; the direct current output interface comprises a socket interface and an inversion interface; the three-phase power supply is connected with the end A of the mutual switching switch through a three-phase input switch; the input end of the inversion module is connected with the inversion interface, the output end of the inversion module outputs alternating current to the B end of the mutual switching switch, and the output end of the mutual switching switch is connected with the alternating current bus; the input end of the alternating current output interface is connected with an alternating current bus. According to the utility model, the direct current generation module and the alternating current generation module are matched to output alternating current and direct current for switching and debugging equipment in a transformer substation, and the storage battery is arranged to supply power when no alternating current exists, so that an alternating current power supply is not required to be introduced, and the device can provide emergency power supply for temporary alternating current and direct current power supply.

Description

Test power supply generating device

Technical Field

The utility model belongs to the technical field of electrical equipment, and particularly relates to a test power supply generating device.

Background

In order to meet the demand of social economic development on electric power, the number of substations in China is increased by 3% -5% each year, thousands of newly built substations are put into operation each year, and meanwhile, according to the requirement of a power grid, a plurality of substations are technically improved each year so as to improve the automation level. According to the national grid company development strategy outline, a total of 6387 intelligent substations are added in the period of the national grid planning 2020-2025. With the comprehensive popularization of power equipment state maintenance and the comprehensive promotion of smart grid construction, market demands of power equipment tests are expected to represent a rapid growth potential. According to different demand sources, the demand of the power equipment test can be divided into two major categories, namely stock demand and newly-increased construction demand. The stock requirement mainly refers to the requirement brought by detecting, maintaining and intelligent reconstruction in the existing power equipment, and the newly increased construction requirement refers to the requirement brought by newly building an extra-high voltage transmission line, newly building substations of various grades and the like in the middle-long-term national range in the future. Therefore, in the face of the current situation of huge power equipment, after primary and secondary equipment of a transformer substation are installed in place, a power supply is required to be connected for debugging so as to judge whether the state of the power equipment is normal or not, so that the construction progress of engineering projects is ensured. Under the condition that the access station internal AC/DC power supply is not provided, in order to ensure that the transformer substation can be checked and accepted, a temporary DC power supply and an AC power supply are required to be accessed for supplying control, instruments and protection devices, automatic devices, a switch switching operation executing mechanism and the like, and functional debugging is performed in advance.

At present, after all secondary equipment is installed in place, a business owner coordinates equipment factories and construction units, a debugging power supply mainly comes from a temporary power supply of a project site, and the problems that the project site has more construction units, troublesome work coordination, unreliable debugging power consumption and the like exist. Even with a DC emergency power supply, the number of batteries typically needs to be 18 to meet the DC220 requirements, and thus the size and weight of the emergency power supply can be inconvenient to handle.

The test power supply generating device is used as independent equipment, can output direct current and alternating current in an emergency, can be used for checking and accepting equipment and overhauling on site for operation and maintenance personnel of a transformer substation, and is convenient to operate and test, and the working efficiency is improved. Along with the comprehensive popularization of the power equipment state maintenance, the construction of the intelligent power grid is continuously advanced, and the extra-high voltage engineering is continuously unfolded, so that under the condition that the requirements on the safety, the stability and the reliability of the power grid are continuously improved, the requirements on the test power supply generating device are higher and higher.

Disclosure of Invention

The utility model aims to provide a test power supply generating device which can output alternating current and direct current to carry out switching debugging of equipment in a transformer substation by arranging a direct current generator and an alternating current generator to match, and can supply power when no alternating current exists by arranging a storage battery, so that an alternating current power supply is not required to be introduced, the device can provide emergency power supply of a temporary alternating current/direct current power supply, and operation and maintenance personnel can conveniently carry out work.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

the utility model relates to a test power supply generating device, which comprises a direct current generator, wherein the direct current generator comprises a plurality of power supply modules which are connected in parallel; the input ends of the power supply modules are connected in parallel and then connected with an alternating current power supply; the output ends of the power supply modules are connected in parallel and then output direct current to a direct current bus; the direct current output interface comprises a plurality of socket interfaces and an inversion interface, and the input end of the direct current output interface is connected with a direct current bus; the alternating current generator comprises a three-phase input switch, a mutual switching switch and an inversion module; one end of the three-phase input switch is connected with a three-phase power supply, and the other end of the three-phase input switch is connected with an end A of the mutual switching switch; the input end of the inversion module is connected with the inversion interface, the output end of the inversion module outputs alternating current and transmits the alternating current to the end B of the mutual switching switch through the isolation transformer, and the output end of the mutual switching switch is connected with the alternating current bus; the input end of the alternating current output interface is connected with an alternating current bus; the ac output interface includes a plurality of jack interfaces.

Further, the input ends of the power supply modules are connected in parallel and then connected with an alternating current power supply through a charging switch

Further, the power module comprises a storage battery, and the power module is connected with the storage battery through a fuse.

Further, socket interfaces on the direct current output interfaces are all connected with the direct current bus through switches, and the socket interfaces on the direct current output interfaces are connected with an opening and closing switch and an energy storage loop of a high-voltage circuit breaker mechanism box in the transformer substation.

Further, the inversion interface is connected with the direct current bus through an inversion input switch.

Further, the socket interfaces of the alternating current output interfaces are connected with the alternating current bus through switches, and the socket interfaces of the alternating current output interfaces are respectively connected with a motor and a control loop of a mechanism box of a high-voltage isolating switch in a transformer substation.

Further, the input end of the inversion module is connected with the inversion interface through a parallel wire.

Further, the direct current generator and the alternating current generator are respectively arranged in two independent boxes.

The utility model has the following beneficial effects:

according to the utility model, the direct current generator and the alternating current generator are matched to output alternating current and direct current for switching and debugging equipment in a transformer substation, and the storage battery is arranged to supply power when no alternating current exists, so that an alternating current power supply is not required to be introduced, the device can provide emergency power supply of a temporary alternating current and direct current power supply, and operation and maintenance personnel can work conveniently.

Of course, it is not necessary for any one product to practice the utility model to achieve all of the advantages set forth above at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a circuit diagram of a test power generation device;

FIG. 2 is a schematic diagram of a box structure with a DC generator installed;

fig. 3 is a schematic diagram of a case structure in which an alternator is mounted.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1, the utility model is a test power generating device, which comprises a dc generator 1, a dc output interface 3, an ac generator 4 and an ac output interface 6;

the direct current generator 1 comprises a plurality of power modules 12 connected in parallel; the power module 12 comprises a storage battery 14, and the power module 12 is connected with the storage battery 14 through a fuse 13; the input ends of the power modules 12 are connected in parallel and then connected with an alternating current power supply through a charging switch 11; the output ends of the power supply modules 12 are connected in parallel and then output direct current to the direct current bus 2; each parallel power module 12 independently manages a battery, and the battery capacity is freely selected from 38AH to 100AH, so that the parallel power modules can be flexibly selected and matched according to actual needs, and are convenient to carry. The power module 12 automatically performs charge and discharge management on the storage battery, has a reverse connection preventing function of the battery, automatically alarms when the battery is reversely connected, and does not work.

And each battery parallel module is in digital current sharing through a CAN bus. The 12V storage battery is discharged, boosted to 220V by the battery parallel modules and then output in parallel, and 3 parallel battery modules can output the maximum current of 15A to supply power for a direct current load, so that the device is suitable for impact loads or inductive loads. The power module displays information: module input voltage, output current and battery voltage, battery current, module power state, battery operating state, battery residual capacity. The used storage battery is convenient to charge and discharge, the storage battery residual capacity can be displayed by the battery parallel connection module, and the operation and maintenance personnel can conveniently control the on-site debugging work development progress.

The direct current output interface 3 comprises a socket interface 32, a socket interface 34 and an inverter interface 36, and the input end of the direct current output interface 3 is connected with the direct current bus 2; the socket interface 32 and the socket interface 34 are respectively connected with the direct current bus 2 through a direct current output loop switch 31 and a direct current output loop switch 33, the socket interface on the direct current output interface 3 is connected with a switching-on/off and energy storage loop of a high-voltage circuit breaker mechanism box in the transformer substation, and the inverter interface 36 is connected with the direct current bus 2 through an inverter input switch 35;

the alternating current generator 4 comprises a three-phase input switch 41, a mutual switching switch 44 and an inversion module 42; one end of the three-phase input switch 41 is connected with a three-phase power supply, and the other end of the three-phase input switch 41 is connected with an end A of the mutual switching switch 44; the input end of the inversion module 42 is connected with the inversion interface 36 through a parallel connection 7; the output end of the inversion module 42 outputs alternating current and transmits the alternating current to the end B of the mutual switching switch 44 through the isolation transformer 43, and the output end of the mutual switching switch 44 is connected with the alternating current bus 5; the inverter module 42 converts the input dc power into three-phase ac power, and then outputs three-phase four-wire system through the secondary side of the internal isolation transformer 43, with rated output current not less than 10A, to supply power to the ac load. And the self-contained independent display screen displays operation data and meets the related requirements of test personnel.

The input end of the alternating current output interface 6 is connected with an alternating current bus 5; the ac output interface 6 includes a socket interface 61 and a socket interface 63, the socket interface of the ac output interface 6 is connected with the ac bus 5 through the ac output loop switch 61 and the output loop switch 63, and the socket interface 61 and the socket interface 63 are connected with a motor and a control loop of a mechanism box of the high-voltage isolating switch in the transformer substation.

As shown in fig. 2-3, the direct current generator 1 and the alternating current generator 4 are respectively arranged in two independent boxes, and universal wheels are arranged at the bottoms of the boxes, so that the box is convenient to move; the box body is of a movable structure, the storage batteries are small in use number, and the storage batteries are convenient for operation and maintenance personnel to carry.

The front panel of the box body structure of the direct current generator 1 is provided with a charging interface 10 and a direct current output interface 3; the charging interface 10 is used for connecting a charging switch with an alternating current power supply; the front panel of the box body structure of the alternating current generator 4 is provided with an alternating current input interface, an inversion input interface 45 and an alternating current output interface 6; the alternating current input interface is used for being connected with three-phase input current; the inversion input interface 45 is used for being connected with the inversion interface 36;

the interface socket is provided with a waterproof mask and is provided with a lighting lamp, so that the device is not damaged in sudden bad weather; when alternating current is input, the parallel battery module rectifies and outputs 220V direct current with stable output, and the instantaneous maximum output current of the device can reach 15A. When no AC input is available, a stable DC 220V voltage can be output for the switch to operate electrically. The box is outdoor structure, and input/output interface has the defending measures, and the test personnel can not cause rain harm equipment when meeting with sleet weather and coming the transport, and the device provides light illumination, makes things convenient for fortune dimension personnel to operate equipment at the condition that light is dark.

The power supply module has the functions of AC-DC and bidirectional DC-DC, and the output current can meet the requirements of disconnecting the disconnecting link and the switch, storing energy and supplying power for the switch, and can also supply working power for control, instruments, protection devices and automatic devices. The direct current input and the alternating current output of the inversion module are completely electrically isolated, the storage battery capacity of each battery parallel module is freely selected and matched between 38AH and 100AH according to the electricity consumption time, at most, 3 batteries are needed, the weight of the box body is greatly reduced, and great convenience is provided for carrying operation and maintenance personnel.

Embodiment one:

the embodiment is a working principle of a test power supply generating device: the direct current generator 1 consists of three power supply modules 12, and each power supply module is connected with a storage battery 14 through a fuse 13. The charging switch 11 is connected in parallel with the input ends of the three power supply modules so as to work the power supply modules and charge the storage battery. The output end of the power supply module is connected in parallel and then connected with a direct current bus, and when alternating current is introduced, the power supply module can directly output 220V direct current. Under the condition of no alternating current, the power supply module can convert the energy storage of the storage battery into 220V direct current for output so as to ensure the emergency power supply of the direct current bus. The direct current output interfaces 3 share three paths of outputs, which are respectively used for the direct current power supply of the switching on/off, energy storage and inversion module 42 of the switch. The ac generator 4 is composed of an inverter module 42, an isolation transformer 43 and a mutual switching switch 44, wherein the output end of the mutual switching switch 44 is connected with an ac bus, the input end a of the mutual switching switch is led into an ac power supply through a three-phase input switch 41, and the input end B of the mutual switching switch is connected with the output end of the inverter module through the isolation transformer 43. When three-phase alternating current is introduced, the mutual switching device directly outputs 380/220V alternating current. Under the condition of no three-phase alternating current, the inversion module introduces a direct current power supply to an input end through a parallel connection 7, and the output of the inversion module provides 380/220V alternating current to an input end B of the mutual switching switch through an isolation transformer so as to ensure emergency power supply of an alternating current bus. The alternating current output interface is divided into two paths, one path outputs three-phase alternating current to the motor, and the other path outputs single-phase alternating current to the control loop of the mechanism operation box.

Embodiment two:

in this embodiment, when the test power generating device can provide ac power, three-phase ac power (a, B, C, N) is introduced into the ac generator 4 through the three-phase switch 41, flows into the ac bus 5 through the output end thereof, and is electrically connected with the motor and the control circuit of the mechanism box of the high-voltage isolating switch in the transformer substation through the ac output loop switch 61, the output loop switch 63, the socket interface 62 and the socket interface 64, so as to facilitate the operation and maintenance personnel to open and close the disconnecting link.

Embodiment III:

in this embodiment, when the test power generating device can provide an ac power source, the ac power source (L, N) is introduced into the dc generator 1 through the charging switch 11, flows into the dc bus 2 through the output end thereof, and is electrically connected with the switching-on/off circuit and the energy storage circuit of the high-voltage circuit breaker mechanism box in the transformer substation through the dc output loop switch 31, the dc output loop switch 33, the socket interface 32 and the socket interface 34, so as to facilitate the operation and maintenance personnel to perform the switching-on/off debugging of the switch.

Embodiment four:

in the test power generation device in the embodiment, when no AC power is available, a storage battery is arranged in the DC generator, and the test power generation device can discharge the DC bus 2 for the use of a switch breaking test. And the wiring 7 is provided with a special connector, so that the operation and maintenance personnel can conveniently perform electric connection on site. The parallel connection wire 7 is electrically connected with the inversion interface 36 in the direct current output interface and the direct current input interface of the inversion module 42, then the direct current input switch 35 is closed to start the inversion module 42 to work, and after the normal running state of the inversion module is checked, the alternating current output loop switch 61 and the alternating current output loop switch 63 are closed, and at the moment, the disconnecting link can be subjected to a disconnection test.

In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the utility model disclosed above are intended only to assist in the explanation of the utility model. The preferred embodiments are not exhaustive or to limit the utility model to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model. The utility model is limited only by the claims and the full scope and equivalents thereof.

Claims (8)

1. A test power supply generating device is characterized by comprising

The direct current generator (1), the said direct current generator (1) includes several power supply modules (12) connected in parallel; the input ends of the power supply modules (12) are connected in parallel and then connected with an alternating current power supply; the output ends of the power supply modules (12) are connected in parallel and then output direct current to the direct current bus (2);

the direct current output interface (3), the direct current output interface (3) comprises a plurality of socket interfaces and an inversion interface (36), and the input end of the direct current output interface (3) is connected with the direct current bus (2);

an alternating current generator (4), wherein the alternating current generator (4) comprises a three-phase input switch (41), a mutual switching switch (44) and an inversion module (42); one end of the three-phase input switch (41) is connected with a three-phase power supply, and the other end of the three-phase input switch (41) is connected with an end A of the mutual switching switch (44);

the input end of the inversion module (42) is connected with the inversion interface (36), the output end of the inversion module (42) outputs alternating current, and the alternating current is transmitted to the end B of the mutual switching switch (44) through the isolation transformer (43), and the output end of the mutual switching switch (44) is connected with the alternating current bus (5);

the alternating current output interface (6), the input end of the alternating current output interface (6) is connected with the alternating current bus (5); the alternating current output interface (6) comprises a plurality of socket interfaces.

2. A test power supply generating device according to claim 1, characterized in that the input terminals of a number of said power supply modules (12) are connected in parallel and then connected to an ac power supply via a charging switch (11).

3. A test power supply generator according to claim 1, characterized in that the power supply module (12) comprises a battery (14), the power supply module (12) being connected to the battery (14) via a fuse (13).

4. The test power supply generating device according to claim 1, wherein socket interfaces on the direct current output interface (3) are connected with the direct current bus (2) through switches, and the socket interfaces on the direct current output interface (3) are connected with a switching-on/off and energy storage loop of a high-voltage circuit breaker mechanism box in a transformer substation.

5. A test power supply generator according to claim 1, characterized in that the inverter interface (36) is connected to the dc bus (2) via an inverter input switch (35).

6. The test power supply generating device according to claim 1, wherein socket interfaces of the alternating current output interface (6) are connected with the alternating current bus (5) through switches, and the socket interfaces of the alternating current output interface (6) are respectively connected with a motor and a control loop of a mechanism box of a high-voltage isolating switch in a transformer substation.

7. A test power supply generator according to claim 1, characterized in that the input of the inverter module (42) is connected to the inverter interface (36) by means of a parallel connection (7).

8. A test power supply generating device according to claim 1, characterized in that the direct current generator (1) and the alternating current generator (4) are respectively mounted in two independently arranged housings.