CN209767152U - Direct current microgrid power supply system based on energy pool - Google Patents
Direct current microgrid power supply system based on energy pool Download PDFInfo
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- CN209767152U CN209767152U CN201920612599.2U CN201920612599U CN209767152U CN 209767152 U CN209767152 U CN 209767152U CN 201920612599 U CN201920612599 U CN 201920612599U CN 209767152 U CN209767152 U CN 209767152U
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Abstract
The utility model discloses a direct current micro-grid power supply system based on an energy battery, which comprises a power supply main unit, a echelon battery, a main control unit and a power supply electronic unit; one end of the power supply main unit is connected with the echelon battery through the energy storage converter, and the other end of the power supply main unit is connected with the main control unit; the main control unit is connected with the power supply electronic unit through a cable, and is used for converting AC380V/220V commercial power or-48 VDC power in a network base station into 250V-600 VDC through a direct current/direct current converter or an alternating current/direct current converter, and transmitting the voltage to the power supply electronic unit through the cable in a long distance. According to the scheme provided by the application, the power supply main unit supplies power in a centralized manner, and the substation side does not need to be provided with a switching power supply and a storage battery pack, so that the investment cost can be reduced; after the original remote stations and micro stations without backup batteries are brought into the micro-grid to become substations, uninterrupted power supply can be guaranteed, and maintenance quality is improved.
Description
Technical Field
The utility model relates to a little grid technical field, in particular to direct current microgrid power supply system based on energy pond.
background
The base station machine room is a machine room for installing mobile communication base station equipment, is usually arranged near an iron tower, a guyed tower and a holding pole for installing a mobile antenna, has a small area, is usually dozens of square meters, and is mainly provided with base station equipment, power supply equipment, transmission equipment, monitoring equipment, an air conditioner and the like. The base station power supply only supplies power for base station equipment, transmission equipment, monitoring equipment, an air conditioner and the like, the load is in thousands of watts, the base station power supply comprises an alternating current distribution box, overvoltage protection, a switching power supply, a storage battery and the like, and some machine rooms are provided with a UPS. The battery power-off protection time is typically several hours.
The existing power supply mode has the following problems:
(1) The power supply is high in electricity charge, unstable in power supply, and needs to pay frequently, so that defaulting and station breaking happen sometimes. The remote station generally has no back-up power supply, and the power is cut off immediately when the power is cut off, so that the perception of a client is influenced.
(2) The macro station needs to be provided with a switching power supply, an air conditioner, a storage battery, an alternating current distribution box and the like, so that the investment is high, and the equipment depreciation is high.
(3) In order to ensure the performance of the battery, the temperature of the macro station is required to be kept at 25 ℃, and the air conditioner is used for a long time and has high energy consumption.
(4)5G construction sites are dense, and the power consumption is large.
(5) The communication introduction has long installation time and complicated procedures, which is not beneficial to quickly building the station.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned defect or not enough among the prior art, the utility model provides a direct current microgrid power supply system based on energy pond.
The utility model provides a direct current micro-grid power supply system based on an energy battery, which comprises a power supply main unit, a echelon battery, a main control unit and a power supply electronic unit; one end of the power supply main unit is connected with the echelon battery through an energy storage converter, and the other end of the power supply main unit is connected with the main control unit; the main control unit is connected with the power supply electronic unit through a cable and is used for converting AC380V/220V commercial power or a-48 VDC power supply in a network base station into 250V-600 VDC through a direct current/direct current converter or an alternating current/direct current converter, and transmitting the voltage to the power supply electronic unit through the cable in a long distance.
Preferably, the main control unit is connected with the power supply main unit through a cable.
Preferably, still include electrical equipment, electrical equipment with the master control unit is connected, electrical equipment includes lighting unit, household electrical appliances unit and expansion unit.
Preferably, the energy storage converter is connected with a battery management system arranged on the echelon battery through a CAN interface and is used for acquiring the state information of the battery pack.
preferably, the echelon battery comprises 16 modules, each module consisting of 4 3.2V, 200AH modular batteries.
Preferably, the power supply system further comprises a monitoring unit, wherein the monitoring unit is used for monitoring the electrical parameters of the power supply main unit, the echelon battery, the main control unit, the power supply electronic unit and the electrical equipment.
Preferably, the monitoring device further comprises an alarm unit, wherein the alarm unit is used for giving an alarm when the monitoring unit monitors the abnormal electrical parameters.
The utility model has the advantages that:
1) A centralized power supply mode for realizing centralized power supply, centralized management and centralized maintenance
The power supply main unit supplies power in a centralized way, and a switching power supply and a storage battery pack are not required to be configured at the substation side, so that the investment cost can be reduced; after the original remote stations and micro stations without backup batteries are brought into the micro-grid to become substations, uninterrupted power supply can be guaranteed, and maintenance quality is improved.
The local side is all installed in the power supply main unit, and all the substation power supplies can be managed and controlled in a centralized manner; the working condition and environment information of the substation can be transmitted to a local side through a power cable, and the energy pool FSU (terminal station data acquisition unit) is accessed, so that the centralized monitoring of all base station power supplies in the microgrid is realized.
2) Echelon battery application non-intrusive solution
The energy pool is connected with the base station alternating current bus and is installed in a non-invasive mode, and the original power supply mode and structure of the base station are not changed. A PCS (energy storage converter) and a echelon battery system are connected to a traditional alternating current distribution input part, and power supply switching from 20ms to 100ms is realized according to different configured switches after commercial power failure by combining the control of a grid-off and grid-connected switch. The peak clipping and valley filling are carried out when the mains supply is normal, the normal operation of the communication equipment is ensured by the lead-acid storage battery of the system when the power is cut off, and after the centralized power supply system is switched to the off-grid operation, the communication equipment is mainly supplied with power by the echelon battery.
Drawings
Fig. 1 is a direct-current microgrid power supply system based on an energy pool provided by an embodiment of the present invention;
Fig. 2 is a schematic diagram of a main control device provided by an embodiment of the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present invention and to simplify the description, but are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
It should be noted that unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and include, for example, fixed or removable connections or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1-2, the present invention provides an energy cell-based dc micro-grid power supply system, which includes a power supply main unit (the energy cell in fig. 1), a echelon battery, a main control unit, and a power supply sub-unit (the energy cell mother-son station in fig. 1); one end of the power supply main unit is connected with the echelon battery through an energy storage converter, and the other end of the power supply main unit is connected with the main control unit; the main control unit is connected with the power supply electronic unit through a cable and is used for converting AC380V/220V commercial power or a-48 VDC power supply in a network base station into 250V-600 VDC through a direct current/direct current converter or an alternating current/direct current converter, and transmitting the voltage to the power supply electronic unit through the cable in a long distance.
According to the scheme provided by the application, the power supply main unit supplies power in a centralized manner, and the substation side does not need to be provided with a switching power supply and a storage battery pack, so that the investment cost can be reduced; after the original remote stations and micro stations without backup batteries are brought into the micro-grid to become substations, uninterrupted power supply can be guaranteed, and maintenance quality is improved. The local side is all installed in the power supply main unit, and all the substation power supplies can be managed and controlled in a centralized manner; the working condition and environment information of the substation can be transmitted to a local side through a power cable, and the energy pool FSU (terminal station data acquisition unit) is accessed, so that the centralized monitoring of all base station power supplies in the microgrid is realized. The energy pool is connected with the base station alternating current bus and is installed in a non-invasive mode, and the original power supply mode and structure of the base station are not changed. A PCS (energy storage converter) and a echelon battery system are connected to a traditional alternating current distribution input part, and power supply switching from 20ms to 100ms is realized according to different configured switches after commercial power failure by combining the control of a grid-off and grid-connected switch. The peak clipping and valley filling are carried out when the mains supply is normal, the normal operation of the communication equipment is ensured by the lead-acid storage battery of the system when the power is cut off, and after the centralized power supply system is switched to the off-grid operation, the communication equipment is mainly supplied with power by the echelon battery.
Further, the main control unit is connected with the power supply main unit through a cable.
Further, still include electrical equipment, electrical equipment with the master control unit is connected, electrical equipment includes lighting unit, household electrical appliances unit and expansion unit.
Further, the energy storage converter is connected with a battery management system arranged on the echelon battery through a CAN interface and used for acquiring the state information of the battery pack.
Further, referring to fig. 2, the echelon battery includes 16 modules each consisting of 4 3.2V, 200AH modular batteries.
The main control end equipment converts AC380V/220V commercial power or-48 VDC power supply in a network base station into direct current/direct current (DC/DC) or alternating current/direct current (AC/DC) to boost the voltage into 250V-600 VDC, and the voltage is transmitted to the terminal equipment at the maximum efficiency through a special cable. The Power Factor Correction (PFC) circuit of the terminal equipment raises the obtained voltage to a stable 400VDC, the voltage does not change along with the fluctuation of the input voltage, and a switching power supply of the terminal equipment converts the 400VDC to a required working voltage of-48 VDC/AC220V/AC380V and the like, so that 24-hour stable power supply is provided for RRU, a micro station, a small macro base station, an outdoor integrated cabinet, a micro cell base station and the like.
The power supply system further comprises a monitoring unit, wherein the monitoring unit is used for monitoring the electrical parameters of the power supply main unit, the echelon battery, the main control unit, the power supply electronic unit and the electrical equipment.
Further, the monitoring device further comprises an alarm unit, wherein the alarm unit is used for giving an alarm when the monitoring unit monitors abnormal electrical parameters.
The working principle is as follows:
When the commercial power is in a normal state, the commercial power AC380V is divided into two paths, one path can directly supply power to the substation, and is converted into DC48V through PCS to charge the echelon battery, and the other path is converted into DC48V through the switching power supply to supply power to the load.
when the commercial power is in a power-off state, the commercial power AC380V has no input, the echelon battery DC48V is converted into AC380V through the PCS, one path supplies power to the substation, and the other path is converted into DC48V through the switching power supply to supply power to the load.
The PCS energy storage converter (Power Conversion System-PCS) can control the charging and discharging processes of the storage battery, carry out alternating current-direct current Conversion, and can directly supply Power for alternating current loads under the condition of no Power grid. The PCS is composed of a DC/AC bidirectional converter, a control unit and the like. The PCS controller receives a background control instruction through communication, and controls the converter to charge or discharge the battery according to the symbol and the size of the power instruction, so that the active power and the reactive power of the power grid are adjusted. The PCS controller is communicated with a BMS (battery management system) through a CAN interface to acquire the state information of the battery pack, so that the protective charging and discharging of the battery CAN be realized, and the running safety of the battery is ensured.
Through the technical means, the electricity charge expenditure is reduced, the peak clipping and valley filling are time-of-use electricity price policies for balancing electricity loads of a power grid company, and electricity utilization enterprises are encouraged to use electricity in a time period with low electricity price. By utilizing the policy, the energy storage system is deployed, the power load is unloaded from the power utilization peak to the power utilization valley, the electric energy is converted into the chemical energy for storage in the valley power period, the chemical energy is converted into the electric energy for supplying power to the load equipment in the power utilization peak period, and the purposes of reducing the electricity price and the electricity fee are achieved at one time. The utilization value of the battery is improved, and the internal resistance of the battery is mainly influenced by factors such as the material, the manufacturing process, the battery structure and the like of the battery, so that the internal resistance of each battery is different. When the battery discharges, the current generates heat through the internal resistance, the energy is consumed, the larger the current is, the more the energy is consumed, so the smaller the internal resistance is, the better the performance of the battery is. The power battery is used in a mode of 'energy storage as a main mode and standby power as an auxiliary mode' and is matched with a battery active management system, different charging currents and voltages are adopted for batteries in different states, the consistency of the whole set of batteries is guaranteed, the problems of over-discharge and under-discharge are avoided, efficient charging and discharging are achieved, the cycle number of the system is improved, the storage battery can be ensured to reach the expected cycle service life, and the utilization value of the battery is exerted to the maximum. The simplified substation equipment is constructed and configured in the current macro station, and power cabinets, air conditioners, batteries and other equipment are all absent, but after the parent substation is networked, the parent substation supplies power to the substation in a direct current remote supply mode, the configuration of the power cabinets, the air conditioners, the batteries and other equipment of the substation is cancelled, and the temperature control of the substation can be realized by a newly added direct current fresh air system. The method is characterized in that operators build stations uniformly adopt the principle of single station design and standard configuration, as station sites are more and more dense, the method still causes great resource waste according to the original design concept, after a master station and a slave station mode is implemented, battery resources can be used for driving, the power battery capacity of the master station is scientifically and dynamically configured according to the load and peak power supply time of all base stations in the microgrid, and the configuration resources of the primary batteries of all the slave stations are cancelled. The batteries adjusted by the substation are configured on other newly-built sites after detection and adjustment, so that the construction cost is reduced.
The above disclosure is only for a few specific embodiments of the present invention, however, the present invention is not limited to the embodiments, and any changes that can be considered by those skilled in the art shall fall within the protection scope of the present invention.
Claims (7)
1. the direct-current micro-grid power supply system based on the energy battery is characterized by comprising a power supply main unit, a echelon battery, a main control unit and a power supply electronic unit;
One end of the power supply main unit is connected with the echelon battery through an energy storage converter, and the other end of the power supply main unit is connected with the main control unit;
The main control unit is connected with the power supply electronic unit through a cable and is used for converting AC380V/220V commercial power or a-48 VDC power supply in a network base station into 250V-600 VDC through a direct current/direct current converter or an alternating current/direct current converter, and transmitting the voltage to the power supply electronic unit through the cable in a long distance.
2. The energy cell-based dc microgrid power supply system of claim 1, wherein said master control unit is connected to said power supply master unit via a cable.
3. The direct-current microgrid power supply system based on an energy pool of claim 1, further comprising electrical equipment, wherein the electrical equipment is connected with the main control unit and comprises a lighting unit, a household appliance unit and an expansion unit.
4. the energy cell-based direct current microgrid power supply system of claim 1, wherein the energy storage converter is connected with a battery management system arranged on the echelon battery through a CAN interface for obtaining battery pack state information.
5. The energy cell-based dc microgrid power supply system of claim 1, wherein said echelon cells include 16 modules, each module consisting of 4 3.2V, 200AH modular cells.
6. The system according to any one of claims 1 to 5, further comprising a monitoring unit, wherein the monitoring unit is configured to monitor electrical parameters of the power supply main unit, the echelon battery, the main control unit, the power supply electronic unit, and the electrical devices.
7. the energy cell-based direct current microgrid power supply system of claim 6 further comprising an alarm unit for alarming when the monitoring unit monitors abnormal electrical parameters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920612599.2U CN209767152U (en) | 2019-04-29 | 2019-04-29 | Direct current microgrid power supply system based on energy pool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920612599.2U CN209767152U (en) | 2019-04-29 | 2019-04-29 | Direct current microgrid power supply system based on energy pool |
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| Publication Number | Publication Date |
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| CN209767152U true CN209767152U (en) | 2019-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920612599.2U Expired - Fee Related CN209767152U (en) | 2019-04-29 | 2019-04-29 | Direct current microgrid power supply system based on energy pool |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112531863A (en) * | 2020-10-23 | 2021-03-19 | 国网浙江省电力有限公司丽水供电公司 | Direct current power supply method and device for high mountain communication station |
| CN113394867A (en) * | 2021-05-27 | 2021-09-14 | 利天万世新能源有限公司 | Intelligent control energy storage system of 5G communication equipment |
-
2019
- 2019-04-29 CN CN201920612599.2U patent/CN209767152U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112531863A (en) * | 2020-10-23 | 2021-03-19 | 国网浙江省电力有限公司丽水供电公司 | Direct current power supply method and device for high mountain communication station |
| CN113394867A (en) * | 2021-05-27 | 2021-09-14 | 利天万世新能源有限公司 | Intelligent control energy storage system of 5G communication equipment |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200716 Address after: 10101, room 1, unit 2, 117 West Road, 710119 hi tech Zone, Shaanxi, Xi'an Co-patentee after: Lingruida Technology Co.,Ltd. Patentee after: XI'AN LINGRUIDA COMMUNICATION EQUIPMENT CO.,LTD. Address before: 10101, room 1, unit 2, 117 West Road, 710119 hi tech Zone, Shaanxi, Xi'an Patentee before: XI'AN LINGRUIDA COMMUNICATION EQUIPMENT Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191210 |
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| CF01 | Termination of patent right due to non-payment of annual fee |