CN205583821U - Mobile modular emergency repair AC and DC integrated power supply - Google Patents

Abstract

The utility model discloses a portable modularization emergency repair alternating current -direct current integration power, include the integrated main cabinet of the direct current that adopts quick connecting device to link together, hold battery cabinet and invertion power supply cabinet, it includes that the first battery cabinet of holding, the second laid side by side hold battery cabinet, the third holds battery cabinet and the fourth holds battery cabinet to hold battery cabinet, the main cabinet of direct current integration includes high frequency switching power supply module and control unit, the control unit is including exchanging control unit, direct current control unit, switching value control unit and insulating control unit, the lower part of the main cabinet of direct current integration is provided with AC socket and the direct current socket that is connected to the invertion power supply cabinet, group battery positive input terminal of the bottom of the main cabinet of direct current integration is connected with the first battery cabinet of holding group battery positive output terminal, and the group battery negative pole input terminal of the main cabinet of direct current integration is connected with the group battery output terminal that the fourth holds battery cabinet, the lower part of invertion power supply cabinet is provided with invertion power supply cabinet NULL socket and invertion power supply cabinet input socket.

Description

Mobile modular emergency repair AC and DC integrated power supply

technical field

The utility model relates to the field of electric power, in particular to a mobile modular emergency repair AC-DC integrated power supply.

Background technique

With the rapid development of the power industry, in order to improve the power supply quality of the power grid, make the power grid operate safely and economically, and realize the automation of the power system, the requirements for the key equipment of the power control system-control power supply are also getting higher and higher. The relay protection automatic device, signal device, emergency lighting and electrical equipment in the substation are generally operated by DC power supply, so the output quality and reliability of the DC power supply are directly related to the safe operation and stable power supply of the substation. Therefore, regular maintenance of the DC power supply is a necessary means to ensure safe operation.

Conventional integrated power supply has problems. Old substations replace AC and DC power systems without backup screen positions; when AC and DC systems fail, there is no backup AC/DC integrated power supply. During the use of the AC-DC integrated power system in the substation, there will be problems such as the disappearance of the AC power supply, failure to restore it for a short time, excessive discharge of the battery pack, and no backup power supply when the AC-DC system is replaced; currently, lithium batteries are not used in the market and are light The mobile fast emergency repair integrated power supply device can quickly replace the original AC-DC integrated power supply system in case of failure of the AC-DC integrated power supply system in the substation, so as to ensure the stable operation of the power consumption system of the substation and avoid damage caused by DC In the event of an accident due to system failure, a mobile modular emergency repair AC-DC integrated power supply system was specially designed and developed.

Utility model content

The purpose of the utility model is to avoid the above disadvantages in the prior art and provide a mobile modular emergency repair AC-DC integrated power supply.

The purpose of this utility model is achieved through the following technical solutions: a mobile modular emergency repair AC-DC integrated power supply is provided, which is characterized in that it includes a DC integrated main cabinet, a battery cabinet and an inverter power supply connected together by a quick connection device cabinet; the integrated power supply is connected to the AC and DC bus bars through a quick connection device; The battery cabinet, the second battery cabinet, the third battery cabinet, and the fourth battery cabinet, the first battery battery group negative terminal at the bottom of the first battery cabinet is connected to the second battery cabinet at the bottom of the second battery cabinet The positive terminal of the battery group of the cabinet is connected to the parallel cabinet terminal, the negative terminal of the battery group of the second battery cabinet of the second battery cabinet is connected to the positive terminal of the battery group of the third battery cabinet of the third battery cabinet, and the terminal of the third battery cabinet is connected to the positive terminal of the battery group of the third battery cabinet. The negative parallel terminal of the third battery cabinet of the battery cabinet is connected to the positive parallel terminal of the battery group of the fourth battery cabinet of the fourth battery cabinet; the DC integrated main cabinet includes a high-frequency switching power supply module and a monitoring unit; the The monitoring unit includes AC monitoring unit, DC monitoring unit, switching value monitoring unit and insulation monitoring unit; the monitoring unit record has RS485, RJ45 communication interface, which can realize connection with the power station automation system; the monitoring unit record provides three-phase AC input ; The lower part of the DC integrated main cabinet is provided with an AC socket to the inverter and a DC socket to the inverter connected to the inverter power cabinet; the positive input terminal of the battery pack at the bottom of the DC integrated main cabinet It is connected to the positive output terminal of the battery pack of the first storage battery cabinet, and the negative input terminal of the battery pack of the DC integrated main cabinet is connected to the negative output terminal of the battery pack of the fourth storage battery cabinet; The inverter DC input socket and the inverter AC input socket for power supply of the equipment, including 2 380V sockets and 4 220V sockets for the power supply of the AC equipment of the substation.

Preferably, the battery capacity of the iron-lithium storage battery is 65AH/220V, the DC equipment load of the 110kV substation is 6-7A, the 65AH battery capacity can run for about 10 hours under load, and the 220kV substation can increase the battery capacity.

Preferably, the inverter power supply cabinet adopts a BSD series sine wave inverter power supply, using sine wave pulse width technology, the main circuit adopts a German Siemens IGBT module, and the driving protection is a Japanese Mitsubishi thick film circuit.

Preferably, the quick connection device is a quick plug.

Preferably, the technical parameters of the integrated power supply are: AC input voltage 3-phase 380V, DC output voltage DC220V, DC output current 6×20A, communication output voltage DC48V, output current 20A, inverter output voltage AC380V/220V, output The power is 5kVA, the accuracy of voltage stabilization is ≤±0.5%, the accuracy of current stabilization is ≤±1%, the noise is ≤45dB, and the operation mode is single-bus operation.

Preferably, the substation AC equipment includes a substation monitoring computer power supply, a switch energy storage motor, and the like.

Preferably, the length of the DC integrated main cabinet is 600mm and the height is 1200mm; the heights of the first battery cabinet, the second battery cabinet, the third battery cabinet and the fourth battery cabinet are equal.

Preferably, the height of the first battery cabinet, the second battery cabinet, the third battery cabinet and the fourth battery cabinet is 800mm.

The beneficial effects of the utility model:

(1) The mobile modular emergency repair AC-DC integrated power supply provided by the embodiment of the utility model adopts a modular design, the module assembly is simple, the volume is small, the weight is light, and it is easy to move. Power supply 220V, DC 48V output function for communication. The power supply device can quickly replace the original AC-DC integrated power supply system in case of failure of the AC-DC integrated power supply system of the substation (such as: the used AC power supply disappears, cannot be restored in a short time, and the battery pack is over-discharged), ensuring that the substation The electrical system used can still operate stably, avoiding power outages due to DC system failures.

(2) In the mobile modularized emergency repair AC-DC integrated power supply provided by the embodiment of the utility model, the iron-lithium battery is small in size and light in weight under the same capacity specification, and the fast charging device is used, and the iron-lithium battery can be used in one 80% of the electricity is fully charged within an hour, and the charging speed is fast, which meets the effectiveness of emergency repairs; in addition, the battery management system is used to manage the charging and discharging of iron-lithium batteries and the test results show that the use of new energy is in line with the national development of low-carbon economy. Requirements, at the same time, the resource-saving and environment-friendly requirements of the law and the State Grid, and the spiritual requirements of new technologies, new products, and new materials.

(3) The mobile modular emergency repair AC-DC integrated power supply provided by the embodiment of the utility model can meet the different requirements of the conventional AC-DC integrated power supply structure of the substation. The integrated power supply has a wide application range and is convenient and fast to install. It meets the emergency repair requirements, and also ensures the firmness and reliability of the connection, and the safety performance meets the national requirements.

Description of drawings

Utilize accompanying drawing to further illustrate the utility model, but the embodiment in the accompanying drawing does not constitute any restriction to the present utility model, for those of ordinary skill in the art, under the premise of not paying creative work, also can obtain according to following accompanying drawing Additional drawings.

Fig. 1 is the front view of the utility model.

Fig. 2 is the rear view of the utility model.

Among them: 1-DC integrated main cabinet, 2-inverter power cabinet, 3-first battery cabinet, 4-second battery cabinet, 5-third battery cabinet, 6-fourth battery cabinet, 7-battery pack positive pole Input terminal, 8-battery pack negative input terminal, 9-AC power input socket, 10-inverter DC socket, 11-inverter AC socket, 12-inverter DC input socket, 13-inverter AC input socket, 14-the battery group negative parallel terminal of the first battery cabinet, 15-the positive output terminal of the battery group of the first battery cabinet, 16-the negative parallel terminal of the battery group of the second battery cabinet, 17-the battery group of the second battery cabinet Positive paralleling terminal, 18-negative paralleling terminal of the third storage battery cabinet, 19-positive paralleling terminal of the battery group of the third storage battery cabinet, 20-negative output terminal of the battery group of the fourth storage battery cabinet, 21-positive terminal of the battery group of the fourth storage battery cabinet Combine cabinet terminals.

detailed description

The utility model is further described in conjunction with the following examples.

The mobile modular emergency repair AC-DC integrated power supply shown in Figure 1 and Figure 2 includes a DC integrated main cabinet 1, a battery cabinet and an inverter power cabinet 2 connected together by a quick connection device; the integrated The power supply and the AC/DC bus bar are connected through a quick connection device; the battery cabinet adopts an iron-lithium battery with charge protection, over-discharge protection, over-current protection and temperature monitoring, which includes the first battery cabinet 3 and the second battery cabinet arranged side by side. The battery cabinet 4, the third battery cabinet 5 and the fourth battery cabinet 6, the first battery battery group negative terminal 14 located at the bottom of the first battery cabinet 3 and the second terminal 14 located at the bottom of the second battery cabinet 4 The positive parallel terminal 17 of the battery pack of the battery cabinet is connected, the negative parallel terminal 16 of the second battery cabinet battery pack of the second battery cabinet 4 is connected to the positive parallel terminal 19 of the third battery cabinet 5 of the third battery cabinet, The third battery cabinet negative terminal 18 of the third battery cabinet 5 is connected to the fourth battery cabinet battery group positive terminal 21 of the fourth battery cabinet 6; the DC integrated main cabinet 1 includes a high-frequency A switching power supply module and a monitoring unit; the monitoring unit includes an AC monitoring unit, a DC monitoring unit, a switching value monitoring unit and an insulation monitoring unit; the monitoring unit adopts a color touch screen display, a graphical interface, and a visual display of the system simulation diagram, which can realize System parameter setting, system working parameter display, system fault indication and system parameter setting; the monitoring unit records historical faults and operation record storage number and remaining storage space; the monitoring unit records have battery automatic management function; the monitoring The unit record has the busbar insulation monitoring function, and the busbar grounding fault alarm; the monitoring unit record has the switch input alarm function, and each switch input can be customized; the monitor unit record has RS485 and RJ45 communication interfaces, which can realize communication with the power station The automation system is connected; the monitoring unit records and provides three-phase AC input; the lower part of the DC integrated main cabinet 1 is provided with an AC outlet 11 connected to the inverter power cabinet 2 and a DC outlet to the inverter. Socket 10; the battery pack positive input terminal 7 at the bottom of the DC integrated main cabinet 1 is connected to the battery pack positive output terminal 15 of the first storage battery cabinet, and the battery pack negative input terminal 8 of the DC integrated main cabinet 1 is connected to the battery pack positive output terminal 15 of the first battery cabinet. The negative output terminal 21 of the battery pack of the fourth battery cabinet is connected; the lower part of the inverter power cabinet 2 is provided with an inverter DC input socket 12 and an inverter AC input socket 13, wherein the 380V socket for powering the AC equipment of the substation 2 and 4 220V sockets.

Preferably, the battery capacity of the iron-lithium battery is 65AH/220V, the load of the DC equipment of the 110kV substation is 6-7A, the capacity of the 65AH battery can run for about 10 hours with load, and the battery capacity of the 220kV substation can be increased; the battery circuit of the iron-lithium battery has Charging protection, over-discharge protection, over-current protection, and temperature monitoring function; inverter power cabinet 2 adopts BSD series sine wave inverter power supply, uses sine wave pulse width technology, the main circuit adopts German Siemens IGBT module, drive protection It is a Japanese Mitsubishi thick-film circuit, which has the characteristics of high reliability, complete protection functions, small waveform distortion, and high power; the AC equipment of the substation includes substation monitoring computer power supply, switching energy storage motor, etc.

Preferably, the quick connection device is a quick plug; the structure of the quick connection device has the characteristics of light weight and convenient movement, and it can be adjusted according to the actual situation to make it meet the requirements of safety, reliability and modular installation; the integrated power supply The technical parameters are: AC input voltage 3-phase 380V, DC output voltage DC220V, DC output current 6×20A, communication output voltage DC48V, output current 20A, inverter output voltage AC380V/220V, output power 5kVA, voltage regulation accuracy ≤± 0.5%, steady current accuracy ≤ ± 1%, noise ≤ 45dB, the operation mode is single bus operation.

Preferably, the DC integrated main cabinet 1 has a length of 600mm and a height of 1200mm. Compared with the conventional screen cabinet with a height of 2260mm, it not only saves the cost of construction, but also has more convenient mobility; the first battery cabinet 3, the second The heights of the battery cabinet 4, the third battery cabinet 5 and the fourth battery cabinet 6 are equal. In this embodiment, the heights of the first battery cabinet 3, the second battery cabinet 4, the third battery cabinet 5 and the fourth battery cabinet 6 are is 800mm.

In addition, the tests on the mobile modular emergency repair AC and DC integrated power supply are as follows:

The test equipment used is shown in the table below:

serial number name factory model 1 digital multimeter FLUKE FLUKE 115C 2 Current Clamp FLUKE Fluke 373 3 DC system comprehensive tester Halma Power FDT-220/110

The test method includes the following steps:

(1) Charger module voltage stabilization: A. Testing instruments: three-phase voltage regulator, rheostat, multimeter, clamp meter; B. Test method: In the floating charge state, the AC input voltage is -10% to + of the rated value The range of 15% changes, the output current changes within the range of 0% to 100% of the rated value, and the output remains stable at any value within the floating charge voltage range; the calculation method of the voltage stabilization accuracy is as follows:

(2) Charger module steady current: A. Testing instruments: three-phase voltage regulator, rheostat, multimeter, clamp meter; B. Test method: In the state of floating charge, the AC input voltage is -10% to + of the rated value The output voltage changes within the range of 15%, and the output current remains stable at any value within the range of 20% to 100% of the rated value. The calculation method of the voltage stabilization accuracy is as follows:

(3) Accuracy test of the corrugation coefficient of the charger module: A. Testing instruments: three-phase voltage regulator, rheostat, multimeter, clamp meter; B. Test method: In the state of floating charge, the AC input voltage is -10% of the rated value Change within the range of +15%, the output current changes within the range of 0% to 100% of the rated value, and the output is at any value within the float voltage range, the calculation method of the voltage stabilization accuracy is as follows:

The test of the power supply unit includes the following steps: (1) Assemble the test system connecting the DC integrated main cabinet 1 and the battery pack; (2) Test the inverter power cabinet 2 separately; (3) Assemble the DC integrated main cabinet 1 and the inverter power cabinet 2 Connect the test system with the battery pack. The data test results of the device operation are shown in the table below:

(1) #1 charger test:

1) #1 Charger Voltage Stabilization Accuracy Test Report (rated voltage 220V, voltage stabilization accuracy ≤±0.5%):

2) Test report on steady current accuracy of #1 charger (rated current 10A, steady current accuracy ≤±1%):

3) Ripple factor accuracy test report (ripple factor accuracy ≤±0.5%)

(2) #2 charger test:

1) #2 charger voltage stabilization accuracy test report (rated voltage 220V, voltage stabilization accuracy ≤±0.5%):

2) #2 charger steady current accuracy test report (rated current 10A, steady current accuracy ≤ ± 1%):

3) Ripple factor accuracy test report (ripple factor accuracy ≤±0.5%)

(3) Battery discharge data:

The integrated power supply system provided by the present invention has three operation modes: ① When the AC system of the substation fails, the inverter power cabinet 2 operates independently; ② When the DC system of the substation fails, the DC integrated main cabinet is used 1 is combined with the battery cabinet; ③ When both the AC and DC systems of the substation fail, the combination of the DC integrated main cabinet 1, the battery cabinet and the inverter power cabinet 2 is used for operation.

The above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting the protection scope of the present utility model. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the utility model The new technical solution shall be modified or equivalently replaced without departing from the spirit and scope of the technical solution of the present utility model.

Claims (8)

1. The most mobile modularized emergency first-aid repair AC/DC integrated power supply, it is characterised in that: include using Quick Connect Kit to connect The main cabinet of direct current integratedization (1), accumulator tank and inverter cabinet (2) together；Described integrated power supply and alternating current-direct current bus Row is connected by Quick Connect Kit；Described accumulator tank uses has charge protection, over, overcurrent protection can The ferrum lithium storage battery of monitoring temperature, it first accumulator tank (3) including laying side by side, the second accumulator tank (4), the 3rd stores Battery rack (5) and the 4th accumulator tank (6), be positioned at the first cell battery pack of the bottom of described first accumulator tank (3) Negative pole cabinet terminal (14) and be positioned at the second accumulator tank battery anode the cabinet terminal of described second accumulator tank (4) bottom (17) connect, the second accumulator tank battery electrode of described second accumulator tank (4) cabinet terminal (16) and the described 3rd 3rd accumulator tank battery anode of accumulator tank (5) cabinet terminal (19) connect, described 3rd accumulator tank (5) 4th accumulator tank battery anode cabinet of the 3rd accumulator tank negative pole cabinet terminal (18) and described 4th accumulator tank (6) Terminal (21) connects；The main cabinet of described direct current integratedization (1) includes high-frequency switching power supply module and monitoring unit；Described monitoring is single Unit includes exchanging monitoring unit, direct-current supervision unit, switching value monitoring unit and insulated monitoring unit；Described monitoring unit record Possess RS485, RJ45 communication interface, can realize being connected with power station automation system；Described monitoring unit record provides three to intersect Stream input；The bottom of the main cabinet of described direct current integratedization (1) be provided be connected to described inverter cabinet (2) to inverter hand over Streaming socket (11) and to inverter direct current jack (10)；The battery anode of the bottom of the main cabinet of described direct current integratedization (1) is defeated Enter terminal (7) to be connected with described first accumulator tank battery anode lead-out terminal (15), the main cabinet of direct current integratedization (1) Battery electrode input terminal (8) is connected with the 4th accumulator tank battery electrode lead-out terminal (21)；Described inverter cabinet (2) bottom arranges inverter direct current input socket (12) that promising transformer station alternating current equipment powers and inserts with inverter ac input Seat (13), wherein, the 380V socket 2 powered for transformer station's alternating current equipment and 220V socket 4.
2. Mobile modularized emergency first-aid repair AC/DC integrated power supply the most according to claim 1, it is characterised in that: described The battery capacity of ferrum lithium storage battery be 65AH/220V, 110kV transforming plant DC machine utilization 6～7A, 65AH battery Capacity can be with load carrying about 10 hours, and 220kV transformer station can increase battery capacity.
3. Mobile modularized emergency first-aid repair AC/DC integrated power supply the most according to claim 1, it is characterised in that: described Inverter cabinet (2) uses the sine-wave inverter of BSD series, uses sinusoidal wave pulse width technology, and main circuit uses Germany Siemens's IGBT module, drives protection for Mitsubishi thick film circuit.
4. Mobile modularized emergency first-aid repair AC/DC integrated power supply the most according to claim 1, it is characterised in that: described Quick Connect Kit is quick plug.
5. Mobile modularized emergency first-aid repair AC/DC integrated power supply the most according to claim 1, it is characterised in that: described The alternating current equipment of transformer station includes supervisory control of substation computer power supply, energy storing of switch motor etc..
6. Mobile modularized emergency first-aid repair AC/DC integrated power supply the most according to claim 1, it is characterised in that: described The technical parameter of integrated power supply is: AC-input voltage 3 phase 380V, VD DC 220V, direct current output electricity Stream 6 × 20A, communication output voltage DC48V, output electric current 20A, inverter output voltage AC380V/220V, output work Rate is 5kVA, the precision of voltage regulation≤± 0.5%, precision of steady current≤± 1%, noise≤45dB, the method for operation is single bus-bar operation.
7. Mobile modularized emergency first-aid repair AC/DC integrated power supply the most according to claim 1, it is characterised in that: described The a length of 600mm of the main cabinet of direct current integratedization (1), height are 1200mm；Described first accumulator tank (3), the second storage The height of battery rack (4), the 3rd accumulator tank (5) and the 4th accumulator tank (6) is equal.
8. Mobile modularized emergency first-aid repair AC/DC integrated power supply the most according to claim 1, it is characterised in that: described The height of the first accumulator tank (3), the second accumulator tank (4), the 3rd accumulator tank (5) and the 4th accumulator tank (6) is 800mm。