CN218300940U - Three-phase to single-phase power supply system of communication base station - Google Patents
Three-phase to single-phase power supply system of communication base station Download PDFInfo
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- CN218300940U CN218300940U CN202222440979.7U CN202222440979U CN218300940U CN 218300940 U CN218300940 U CN 218300940U CN 202222440979 U CN202222440979 U CN 202222440979U CN 218300940 U CN218300940 U CN 218300940U
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Abstract
The utility model discloses a three-phase to single-phase power supply system of a communication base station, which comprises a single-phase line voltage output power supply access and electric energy metering unit, an electric energy transmission line, a voltage regulation compensation device and a base station load; the single-phase line voltage output power access and electric energy metering unit comprises a base station single-phase power access and an electric energy metering ammeter corresponding to three phases, wherein the base station single-phase power access is converted from a three-phase four-wire system at the low-voltage side of a public transformer or a special transformer into single-phase line voltage for output; the electric energy transmission line comprises a public transformer electric energy transmission line which is converted into single-phase line voltage output from a public transformer three-phase four-wire system or a special transformer electric energy transmission line which is converted into single-phase line voltage output from a special transformer low-voltage side three-phase four-wire system; the voltage regulation compensation device comprises a voltage regulation transformer and a reactive compensation device. The utility model provides a basic station load unbalanced three phase's problem improves the power supply reliability.
Description
Technical Field
The utility model relates to an electricity supply system technical field, more specifically relates to a communication base station three-phase changes single-phase power supply system.
Background
At present, a three-phase four-wire power supply mode is commonly adopted in communication base stations in China, because the three phases of the loads of the base stations are unbalanced, open-phase faults are often caused, partial loads cannot work normally, the equipment fault rate is high, the operation and maintenance cost is high, the power loss of a line is increased, and energy waste is caused; in addition, since the power consumption of the base station load is very small compared to other power consumers, it is necessary to change the three-phase four-wire or three-phase three-wire power supply system of the communication base station to the single-phase voltage power supply system.
However, the problem that present communication base station three-phase changes single-phase voltage power supply mode exists is: because A, B, C three phases respectively carry three different loads to neutral line N and three 220V single phases, and the three-phase power supply capacity is one third of the total power supply capacity under the condition that the total power supply capacity does not exceed the standard, when the three-phase load is unbalanced, one phase is overloaded, the other phase or two phases are underloaded, even a phase failure is caused, and the failed phase load is powered off. Meanwhile, the loss of the line is increased due to the unbalanced three-phase load and the transmission of electric energy by 220V phase voltage.
Therefore, a system for converting three-phase to single-phase power supply of a communication base station is needed to solve the problem of unbalanced three-phase of the base station load, improve the reliability of power supply, reduce the power loss of the line with unbalanced three-phase load, reduce the failure rate of equipment, and reduce the operation and maintenance cost of the base station.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a communication base station three-phase changes single-phase power supply system solves the unbalanced problem of basic station load three-phase, improves the power supply reliability, reduces the unbalanced line power loss of three-phase load, reduces equipment trouble rate, reduces basic station fortune dimension cost.
In order to solve the problems, the three-phase to single-phase power supply system of the communication base station comprises a single-phase line voltage output power supply access and electric energy metering unit, an electric energy transmission line, a voltage regulation compensation device and a base station load;
the single-phase line voltage output power access and electric energy metering unit comprises a base station single-phase power access and an electric energy metering ammeter corresponding to three phases, wherein the base station single-phase power access is converted from a three-phase four-wire system at the low-voltage side of a public transformer or a special transformer into single-phase line voltage for output;
the electric energy transmission line comprises a public transformer electric energy transmission line which is converted into single-phase line voltage output from a public transformer three-phase four-wire system or a special transformer electric energy transmission line which is converted into single-phase line voltage output from a special transformer low-voltage side three-phase four-wire system;
the voltage regulating compensation device comprises a voltage regulating transformer and a reactive compensation device, wherein the voltage regulating transformer is used for boosting or reducing voltage to a 220V single-phase power supply to supply power to a three-phase load in parallel; the reactive compensation device is used for compensating the starting current of the air conditioning equipment;
the single-phase line voltage output power supply is connected with the input of the voltage regulating and compensating device through an electric energy transmission line; and the base station load is connected with the output of the voltage regulation and compensation device.
Particularly, the base station single-phase power access comprises a non-electric-energy transmission phase circuit and a neutral line N, wherein the non-electric-energy transmission phase circuit is a three-phase circuit; and the disconnected non-electric energy transmission phase line and the disconnected non-electric energy transmission neutral line N are respectively connected with two ends of the two electric energy transmission lines in parallel pairwise.
Particularly, the wiring mode of the electric energy transmission line of the public transformer is that three phases of the output end of a three-phase four-wire system power supply are respectively connected with the homonymous ends of current coils and the homonymous ends of voltage coils of three electric meters, the heteronymous ends of the current coils are connected with the power supply access end of a communication base station, the heteronymous ends of the current coils are not connected with the power supply access end of the communication base station, and the heteronymous ends of the voltage coils of the three electric meters are respectively connected with a neutral line.
In particular, the special transformer electric energy transmission line is connected in a mode of disconnecting the middle phase of the high-voltage side of the special transformer.
Particularly, three phases of the three-phase four-wire system at the low-voltage side of the public transformer or the special transformer, which are converted into single-phase line voltage to be output, are respectively connected with the homonymous ends of current coils and the homonymous ends of voltage coils of three electric meters, the heteronymous ends of the current coils are connected with the power supply access end of the communication base station, the disconnection of the connection relation is avoided, and the heteronymous ends of the voltage coils of the three electric meters are respectively connected with a neutral line.
Particularly, the primary side of the voltage regulating transformer can select a voltage boosting mode or a voltage reducing mode, the secondary side of the voltage regulating transformer is the voltage regulating mode, and the voltage regulating range meets the requirement that the voltage quality of the power supply of the commercial power line is not more than 2000 meters in a long distance and the voltage quality of the power supply of the power generation phase voltage of the oil engine is qualified.
Particularly, the design capacity and the switching group number of the reactive power compensation device ensure that the power factor of the communication base station is not lower than 0.95.
In particular, the base station load includes a power supply device, a communication device, a storage battery, a lighting device, an air conditioning device, and an auxiliary electric device of the base station.
The working principle of the utility model is as follows:
the base station load is less powerful than the industrial load and the three-phase load is severely unbalanced. A severe three-phase load imbalance will result in a phase loss fault and increased power loss to the line. The utility model discloses change the basic station power supply mode of three-phase four-wire system into single phase line voltage power supply mode, with 220V's single phase voltage, improve 400V single phase line voltage transmission electric energy, reduce the power consumption. Meanwhile, a voltage regulating and compensating device is added to the base station to dynamically adjust the power supply voltage of the base station and compensate the starting current of the air conditioning equipment. The power quality of the base station load and the working efficiency of the communication equipment are ensured.
The utility model has the advantages that:
the utility model discloses set up single phase line voltage output power and insert and add the pressure regulating compensation arrangement at base station, single phase line voltage output power inserts the input of connecting pressure regulating compensation arrangement through electric energy transmission line, the base station single phase power who turns into single-phase line voltage output from public transformer or special transformer low pressure side three-phase four-wire system promptly inserts, electric energy transmission line includes turns into single-phase line voltage output's public transformer electric energy transmission line or turns into single-phase line voltage output's special transformer electric energy transmission line from special transformer low pressure side three-phase four-wire system from public transformer three-phase four-wire system, pressure regulating compensation arrangement includes voltage regulating transformer and reactive power compensator, it is unbalanced to have the three-phase load of eliminating, avoid the default phase trouble to appear, reduce circuit electric energy loss, improve basic station power supply ability and voltage quality, improve the power supply reliability, guarantee air conditioner normal use, communication quality and efficiency are improved.
Compared with the prior art, the utility model discloses have that the service reliability is high, overload ability is strong, the pressure regulating range is wide, voltage quality is good, the electric energy utilization efficiency is high, the line loss is little, the load characteristic influences little superiority to safe operation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a working circuit according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention can be more clearly and clearly defined.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like refer to the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that the utility model is usually placed when in use, and are used for convenience of description and simplification of description, but do not refer to or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
As shown in fig. 1, the system for converting three-phase to single-phase power supply of a communication base station of this embodiment includes a single-phase line voltage output power access and electric energy metering unit, an electric energy transmission line, a voltage regulation compensation device, and a base station load.
The single-phase line voltage output power access and electric energy metering unit comprises a base station single-phase power access and an electric energy metering meter corresponding to three phases, wherein the base station single-phase power access is converted from a three-phase four-wire system at the low-voltage side of a public transformer or a special transformer into single-phase line voltage for output.
The power transmission line comprises a public transformer power transmission line which is converted into a single-phase line voltage output from a public transformer three-phase four-wire system or a special transformer power transmission line which is converted into the single-phase line voltage output from a special transformer low-voltage side three-phase four-wire system.
The voltage regulation compensation device comprises a voltage regulation transformer and a reactive compensation device, wherein the voltage regulation transformer is used for boosting or reducing voltage to be 220V single-phase power supply for supplying power to the three-phase load in parallel. The reactive compensation device is used for compensating the starting current.
The single-phase line voltage output power is connected with the voltage regulating and compensating device through the electric energy transmission line. The base station load is connected with the voltage regulation and compensation device.
The base station single-phase power access comprises a non-electric energy transmission phase line and a neutral line N, wherein the non-electric energy transmission phase line is a three-phase line; and the disconnected non-electric energy transmission phase line and the disconnected non-electric energy transmission neutral line N are respectively connected with two ends of the two electric energy transmission lines in parallel pairwise.
The wiring mode of the electric energy transmission line of the public transformer is that three phases of the output end of a three-phase four-wire system power supply are respectively connected with the homonymous ends of current coils and the homonymous ends of voltage coils of three electric meters, the heteronymous ends of the current coils are connected with the power supply access end of a communication base station and are not disconnected in connection, and the heteronymous ends of the voltage coils of the three electric meters are respectively connected with a neutral line. The access mode is that the single-phase power supply of the communication base station is accessed from two phases A, B with light load on the low-voltage side of the public transformer, or B, C, or C, A, and the non-accessed phase and the neutral line N are respectively disconnected on the output side of the three-phase four-wire system power supply side and the input side of the communication base station.
The connection mode of the special transformer electric energy transmission line is to disconnect the middle phase of the high-voltage side of the special transformer. The access mode is to disconnect the intermediate phase B at the high-voltage side of the special transformer; for example: the phase B is disconnected, a single-phase power supply of the communication base station is accessed from the two-side phase A, C, and the phase B is not accessed; the phase B and the neutral line N are disconnected at the output side of the three-phase four-wire system power supply and the input side of the communication base station, respectively.
Three phases of the three-phase four-wire system at the low-voltage side of the public transformer or the special transformer, which are converted into single-phase line voltage to be output, are respectively connected with the homonymous ends of current coils and the homonymous ends of voltage coils of three electric meters, the heteronymous ends of the current coils are connected with the power supply access end of the communication base station without disconnection of connection relation, and the heteronymous ends of the voltage coils of the three electric meters are respectively connected with a neutral line. The wiring mode is that A phase, B phase and C phase of the three-phase four-wire system power supply output end are respectively connected with the homonymous ends of current coils and the homonymous ends of voltage coils of three electric meters, the heteronymous ends of the current coils are connected with the power supply access end of the communication base station, disconnection of the connection relation is avoided, and the heteronymous ends of the voltage coils of the three electric meters are respectively connected with a neutral line N.
The primary side of the voltage regulating transformer can select a voltage boosting mode or a voltage reducing mode, the secondary side of the voltage regulating transformer is the voltage regulating mode, and the voltage regulating range meets the requirement that the voltage quality of the voltage supply of the commercial power line and the voltage supply of the oil engine generating phase in a long distance of not more than 2000 meters is qualified.
The design capacity and the switching group number of the reactive power compensation device meet the reactive power compensation requirements of air conditioner starting and normal operation in the base station, and ensure that the power factor of the communication base station is not lower than 0.95.
The base station load includes a power supply device, a communication device, a storage battery, a lighting device, an air conditioning device, and an auxiliary electric device of the base station.
The working principle of the embodiment of the utility model is as follows:
the base station load is less powerful than the industrial load and the three-phase load is severely unbalanced. A severe three-phase load imbalance will result in a phase-loss fault and increased power loss in the line. The utility model discloses change the basic station power supply mode of three-phase four-wire system into single-phase line voltage power supply mode, with 220V's single-phase voltage, improve 400V single-phase line voltage transmission electric energy, reduce the electric energy loss. Meanwhile, a voltage regulation compensation device is added in the base station to dynamically adjust the power supply voltage of the base station and compensate the starting current of the air conditioning equipment. The power quality of the base station load and the working efficiency of the communication equipment are ensured.
The embodiment of the utility model provides a beneficial effect as follows:
the utility model discloses set up single phase line voltage output power and insert and add the pressure regulating compensation arrangement at base station, single phase line voltage output power inserts the input of connecting pressure regulating compensation arrangement through electric energy transmission line, the base station single phase power who turns into single-phase line voltage output from public transformer or special transformer low pressure side three-phase four-wire system promptly inserts, electric energy transmission line includes turns into single-phase line voltage output's public transformer electric energy transmission line or turns into single-phase line voltage output's special transformer electric energy transmission line from special transformer low pressure side three-phase four-wire system from public transformer three-phase four-wire system, pressure regulating compensation arrangement includes voltage regulating transformer and reactive power compensator, it is unbalanced to have the three-phase load of eliminating, avoid the default phase trouble to appear, reduce circuit electric energy loss, improve basic station power supply ability and voltage quality, improve the power supply reliability, guarantee air conditioner normal use, communication quality and efficiency are improved.
Compared with the prior art, the utility model discloses have that the service reliability is high, overload ability is strong, the pressure regulating range is wide, voltage quality is good, the electric energy utilization efficiency is high, the line loss is little, the load characteristic influences little superiority to safe operation.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, various changes and modifications can be made by the owner within the scope of the appended claims, and the protection scope of the present invention should not be exceeded by the claims.
Claims (8)
1. The utility model provides a communication base station three-phase becomes single-phase power supply system which characterized in that: the system comprises a single-phase line voltage output power supply access and electric energy metering unit, an electric energy transmission line, a voltage regulation and compensation device and a base station load;
the single-phase line voltage output power access and electric energy metering unit comprises a base station single-phase power access and an electric energy metering ammeter corresponding to three phases, wherein the base station single-phase power access is converted from a three-phase four-wire system at the low-voltage side of a public transformer or a special transformer into single-phase line voltage for output;
the electric energy transmission line comprises a public transformer electric energy transmission line which is converted into single-phase line voltage output from a public transformer three-phase four-wire system or a special transformer electric energy transmission line which is converted into single-phase line voltage output from a special transformer low-voltage side three-phase four-wire system;
the voltage regulating compensation device comprises a voltage regulating transformer and a reactive compensation device, wherein the voltage regulating transformer is used for boosting or reducing voltage to a 220V single-phase power supply to supply power to a three-phase load in parallel; the reactive compensation device is used for compensating the starting current of the air conditioning equipment;
the single-phase line voltage output power supply is connected with the input of the voltage regulating and compensating device through an electric energy transmission line; and the base station load is connected with the output of the voltage regulation and compensation device.
2. The system of claim 1, wherein the system comprises: the base station single-phase power access comprises a non-electric energy transmission phase line and a neutral line N, wherein the non-electric energy transmission phase line is a three-phase line; and the disconnected non-electric energy transmission phase line and the disconnected non-electric energy transmission neutral line N are respectively connected with two ends of the two electric energy transmission lines in parallel pairwise.
3. The system of claim 1, wherein the system comprises: the wiring mode of the electric energy transmission line of the public transformer is that three phases of the three-phase four-wire system power output end are respectively connected with the homonymous ends of current coils and the homonymous ends of voltage coils of three electric meters, the heteronymous ends of the current coils are connected with the power supply access end of a communication base station, disconnection of the connection relation is avoided, and the heteronymous ends of the voltage coils of the three electric meters are respectively connected with a neutral line.
4. The system of claim 1, wherein the system comprises: the wiring mode of the special transformer electric energy transmission line is to disconnect the middle phase of the high-voltage side of the special transformer.
5. The system of claim 1, wherein the system comprises: the three phases of the three-phase four-wire system at the low-voltage side of the public transformer or the special transformer, which are converted into single-phase line voltage to be output, are respectively connected with the homonymous ends of current coils and the homonymous ends of voltage coils of three electric meters, the heteronymous ends of the current coils are connected with the power supply access end of the communication base station without disconnection of connection relation, and the heteronymous ends of the voltage coils of the three electric meters are respectively connected with a neutral line.
6. The system of claim 1, wherein the system comprises: the primary side of the voltage regulating transformer can select a voltage boosting mode or a voltage reducing mode, the secondary side of the voltage regulating transformer is a voltage regulating mode, and the voltage regulating range meets the requirement that the voltage quality of the electric supply line voltage power supply and the oil engine generating phase voltage power supply which are not more than 2000 meters in distance is qualified.
7. The system of claim 1, wherein the system comprises: the design capacity and the switching group number of the reactive power compensation device ensure that the power factor of the communication base station is not lower than 0.95.
8. The system of claim 1, wherein the system comprises: the base station load includes a power supply device, a communication device, a storage battery, a lighting device, an air conditioning device, and an auxiliary electric device of the base station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222440979.7U CN218300940U (en) | 2022-09-15 | 2022-09-15 | Three-phase to single-phase power supply system of communication base station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222440979.7U CN218300940U (en) | 2022-09-15 | 2022-09-15 | Three-phase to single-phase power supply system of communication base station |
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| CN218300940U true CN218300940U (en) | 2023-01-13 |
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| CN202222440979.7U Active CN218300940U (en) | 2022-09-15 | 2022-09-15 | Three-phase to single-phase power supply system of communication base station |
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