CN111162662A - Intelligent power adapter and working method thereof, and intelligent electric pole - Google Patents

Intelligent power adapter and working method thereof, and intelligent electric pole Download PDF

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Publication number
CN111162662A
CN111162662A CN202010048842.XA CN202010048842A CN111162662A CN 111162662 A CN111162662 A CN 111162662A CN 202010048842 A CN202010048842 A CN 202010048842A CN 111162662 A CN111162662 A CN 111162662A
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power
current
output interface
voltage
controller
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冯斌
尹中华
吴榕青
张业勤
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Shenzhen Grid Smart Energy Technology Co Ltd
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Shenzhen Grid Smart Energy Technology Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/40—Testing power supplies
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/02—Circuit arrangements for ac mains or ac distribution networks using a single network for simultaneous distribution of power at different frequencies; using a single network for simultaneous distribution of ac power and of dc power
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0009—Devices or circuits for detecting current in a converter
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0083—Converters characterised by their input or output configuration
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0083—Converters characterised by their input or output configuration
    • H02M1/009—Converters characterised by their input or output configuration having two or more independently controlled outputs

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Direct Current Feeding And Distribution (AREA)

Abstract

The invention discloses an intelligent power adapter and a working method thereof, and an intelligent electric pole, wherein the intelligent power adapter comprises a controller, a power input interface, a power output interface and a switch module; the connection relationship between the power input interface and the power output interface is one or more of the following: the power input interface is connected with the corresponding power output interface through the electric energy conversion device and the switch module; the power input interface is connected with the corresponding power output interface through the switch module; the power input interface is directly connected with the power output interface, and the power output interface is connected with the switch module; the switch module is connected with the controller. The intelligent power adapter can independently control the loads connected with the power output interfaces of the power adapter according to actual condition requirements, and remote switching of a load power supply is achieved. The controller can acquire corresponding voltage and current signals in real time through each voltage processing circuit and each current processing circuit, and real-time monitoring of the working state and the power utilization condition of the power adapter is achieved.

Description

Intelligent power adapter and working method thereof, and intelligent electric pole
Technical Field
The invention relates to the technical field of power supply, in particular to an intelligent power adapter and a working method thereof, and an intelligent electric pole.
Background
With the development of global information technology, electronic equipment products have completely penetrated the lives of people. Many electronic devices are portable and are widely used as communication tools.
At present, many electronic devices need a power adapter to supply power when working. A power adapter (Poweradapter) is a power supply conversion device for small portable electronic equipment and electronic appliances, generally comprises a shell, a power transformer, an inverter, a rectification circuit and the like, and can be divided into an alternating current output type and a direct current output type according to the output type; according to the connection mode, the device can be divided into a wall-inserting type and a desktop type. It is widely used in telephone set, game machine, language repeater, walkman, notebook computer, cellular phone, etc.
In the prior art, a power adapter is only used for alternating current and direct current conversion, so that the converted alternating current and direct current can be directly applied to or charge corresponding equipment, when multiple paths of outputs exist in the power adapter and multiple application loads are connected, the power adapter cannot be controlled independently for each path of load, and only power supplies of all the application loads can be turned off or on, and therefore control over the application loads is very inflexible.
Street lamps are lamps and lanterns that provide the illumination function for the road, generally refer to the lamps and lanterns in the road surface illumination scope in the traffic lighting. Street lamps are widely used in various places requiring illumination. Along with the construction and development of smart cities, the functions of street lamps are gradually expanded to smart electric poles of smart cities which are integrated with various applications. The intelligent electric pole is also called as a multifunctional electric pole, an intelligent street lamp, an intelligent electric pole and the like.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an intelligent power adapter which can independently control the loads connected with the power output interfaces of the power adapter according to the actual condition requirements so as to realize remote switching of load power supplies; and the real-time monitoring of the working state and the power utilization condition of the power adapter can be realized.
The second purpose of the invention is to provide an operating method of the intelligent power adapter.
A third object of the present invention is to provide an intelligent electric pole.
The first purpose of the invention is realized by the following technical scheme: an intelligent power adapter comprises a controller, a power input interface, a power output interface, an electric energy conversion device, a switch module, a voltage processing circuit and a current processing circuit;
the power input interface is connected with the input end of the electric energy conversion device, and the output end of the electric energy conversion device is connected with each power output interface; a switch module is arranged on a connecting line of the power input interface and the power output interface; the switch module is connected with the controller and controls the working state of the controller; the switch module is a magnetic latching relay;
each voltage monitoring port of the power adapter is connected with a voltage processing circuit and is connected with the input end of the voltage processing circuit; each current monitoring port of the power adapter is connected with a current processing circuit and is connected with the input end of the current processing circuit;
the controller is connected with the output ends of the voltage processing circuits and the current processing circuits and is used for acquiring signals output by the voltage processing circuits and the current processing circuits and then judging the working state of the power adapter and the power utilization condition of a power supply load supplied by the power adapter according to the signals output by the voltage processing circuits and the current processing circuits;
the voltage monitoring port of the power adapter comprises a port arranged before the input end of the power input interface and a port arranged before the input end of the power output interface; the current monitoring port of the power adapter comprises a port arranged behind the output end of the power input interface and in front of the input end of the power output interface.
Preferably, the number of the electric energy conversion devices is multiple;
the power input interface is respectively connected to the input end of each electric energy conversion device through each switch module, and the output end of each electric energy conversion device is correspondingly connected with each power output interface;
the electric energy conversion device comprises one or more of an electric energy conversion device for converting alternating current into alternating current, an electric energy conversion device for converting alternating current into direct current, an electric energy conversion device for converting direct current into alternating current and an electric energy conversion device for converting direct current into direct current.
Preferably, the controller is connected with a communication module and communicates with an external terminal through the communication module.
Preferably, the intelligent adapter further comprises a leakage current transformer, and the leakage current transformer is arranged on a circuit connected with the output end of the power input interface;
the leakage current transformer is connected to the controller through a current processing circuit.
Furthermore, the power supply device also comprises a shell, wherein the shell comprises a wire inlet bin, a wire dividing bin, a control bin, a mutual inductor bin, an electric energy conversion bin and a wire outlet bin from a power supply input interface to a power supply output interface in sequence;
defining a line connected with the output end of the power input interface as a bus line, and defining a line connected with each power output interface of the bus line as a branch line; wherein:
the leakage current transformer is arranged in the wire inlet bin, and the power input interface is arranged in the wire inlet bin and is exposed out of the wire inlet bin;
the connection end points of the main line of the power adapter and each branch line are arranged in the branch bin;
the switch module is arranged in the control bin;
the current transformers in the current processing circuits are arranged in a transformer bin;
the electric energy conversion device is arranged in the electric energy conversion bin;
the power output interface is arranged in the wire outlet bin and exposes the wire outlet bin.
The second purpose of the invention is realized by the following technical scheme: the invention relates to a working method of an intelligent power adapter, which comprises the following steps:
the current input by the power input interface is converted into electric energy through the electric energy conversion device and is output to the power output interface after passing through the switch module;
the controller controls whether the corresponding power output interface outputs current or not by controlling the working state of the switch module at the input end of each power output interface;
voltage signals of each voltage monitoring port of the power adapter are obtained through each voltage processing circuit, and are transmitted to the controller after being processed;
voltage signals of each current monitoring port of the power adapter are obtained through each current processing circuit and are transmitted to the controller after being processed;
the controller judges the working state of the power adapter according to the signals sent by the voltage processing circuit and the current processing circuit, and calculates the power utilization condition of the load supplied by the power adapter.
Preferably, the controller determines the power consumption condition of the power supply load supplied by the power adapter according to signals sent by the voltage processing circuit and the current processing circuit, and the specific details are as follows:
the controller collects signals output by the voltage processing circuit connected with the input end of each power output interface, and acquires the input voltage of each power output interface according to the signals; meanwhile, the controller collects signals output by the current processing circuit connected with the input end of each power output interface, and acquires the current input by each power output interface according to the signals; according to the voltage and current input by each power output interface, the power consumption of the load connected with each power output interface is obtained:
Figure RE-GDA0002422725360000031
wherein Qi,SThe power consumption, uout, of the load connected with the ith power output interface in the time period Si,kThe voltage is input into the input end of the ith power supply output interface acquired by the kth sampling point in the time period S; iouti,kThe current is input into the input end of the ith power supply output interface acquired by the kth sampling point in the time period S; n is a radical ofsThe total number of sampling points of the signal in the time period S;
the controller determines the working state of the power adapter according to the signals sent by the voltage processing circuit and the current processing circuit, and the working state is as follows:
the controller acquires a signal output by a voltage processing circuit connected with the input end of the power input interface, acquires the voltage input by the power input interface according to the signal, and acquires a first criterion V1 according to the voltage:
Figure RE-GDA0002422725360000041
wherein N is the total number of sampling points of each sampling period T, VCC is the power supply voltage of the controller, UinkThe input voltage of the power input interface acquired for the kth sampling point;
judging whether abs (V1) is larger than zero, if yes, judging that the power adapter is in a power-on state;
judging whether abs (V1) is greater than 1.1 × N × 0.5 × VCC, if yes, judging that the power adapter has overvoltage, judging whether abs (V1) is less than 0.85 × N × 0.5 × VCC, if yes, judging that the power adapter has undervoltage;
the controller acquires a signal output by a current processing circuit connected with the output end of the power input interface, acquires the current output by the power input interface according to the signal, and acquires a second judgment data V2 according to the current:
Figure RE-GDA0002422725360000042
Iinkthe output current of the power input interface acquired by the kth sampling point;
it is determined whether abs (V2) is greater than a first threshold IIshortcurrentIf so, judging that the power adapter has a short circuit condition; wherein, IIshortcurrentThe unit is ampere, and the ratio is the transformation ratio of a current transformer in a current processing circuit connected with the output end of the power input interface;
it is determined whether abs (V2) is greater than a second threshold IovercurrentIf yes, judging that the power adapter has overcurrent condition, wherein Iovercurrent-40 × N/traso in amps;
the controller acquires signals output by the current processing circuit connected with the input end of each power output interface, acquires currents input by each power output interface according to the signals, and acquires signals corresponding to each third criterion V3_ i according to the currents:
Figure RE-GDA0002422725360000043
Iinki is the current input by the ith power supply output interface acquired by the kth sampling point;
it is determined whether abs (V3_ I) is greater than a third threshold value I _ IovercurrentIf yes, judging that the circuit connected with the input end of the ith power output interface has an overcurrent condition;
wherein:
I_iovercurrent＝Xi*N/Tratioi；
Figure RE-GDA0002422725360000051
Tratioithe transformation ratio of a current transformer in a current processing circuit connected with the input end of the ith power supply output interface is obtained; piThe total power of the load connected with the ith power supply output interface; u is the effective value of the input voltage of the power input interface; d is the insurance coefficient;
the controller collects signals output by a current processing circuit connected with the leakage current transformer, obtains the current output by the leakage current transformer according to the signals, and obtains a corresponding fourth criterion V4 according to the current:
Figure RE-GDA0002422725360000052
Irckthe current output by the leakage current transformer acquired at the kth sampling point;
determining whether abs (V4) is greater than 0.2N/Transior，TratiorIs the transformation ratio of the leakage current transformer.
The third purpose of the invention is realized by the following technical scheme: the intelligent power pole is characterized by comprising the intelligent power adapter disclosed by the first object of the invention, and the intelligent power adapter is arranged inside the intelligent power pole.
Preferably, the intelligent electric pole further comprises a first circuit breaker with electric leakage protection and an alternating current lightning protection circuit;
the circuit that intelligent pole outside was inserted connects gradually the power input interface who connects intelligent power adapter behind first circuit breaker of connecting band and the exchange lightning protection circuit.
Preferably, the intelligent electric pole further comprises one or more second circuit breakers; each second circuit breaker is connected with the controller and works according to the working state of the controller;
and each power output interface of the intelligent power adapter is correspondingly connected with each second circuit breaker respectively, and is correspondingly connected with the external load of the intelligent electric pole after passing through each second circuit breaker.
Compared with the prior art, the invention has the following advantages and effects:
(1) the intelligent power adapter comprises a controller, a power input interface, a power output interface, an electric energy conversion device and a switch module; the switch module is a magnetic latching relay connected with the controller, and the working state of the switch module is controlled by the controller; the power input interface is connected with the input end of the electric energy conversion device, and the output end of the electric energy conversion device is connected with each power output interface; and a switch module is arranged on a connecting line of the power input interface and the power output interface. The power adapter comprises a power adapter, a controller, a voltage processing circuit, a current processing circuit and a controller, wherein the voltage processing circuit is connected to each voltage monitoring port of the power adapter, the current processing circuit is connected to each current monitoring port of the power adapter, the controller is connected with the output ends of the voltage processing circuit and the current processing circuit and used for collecting signals output by the voltage processing circuit and the current processing circuit and judging the working state of the power adapter and the power utilization condition of a load supplied by the power adapter according to the signals output by the voltage processing circuit and the current processing. In the invention, the controller can control whether each power output interface outputs current or not by controlling each switch module, thereby realizing independent control on the load connected with each power output interface of the power adapter according to the actual condition requirement, realizing remote switching of a load power supply and effectively supporting the safe overhaul of each load. In addition, the controller can acquire corresponding voltage and current signals in real time through each voltage processing circuit and each current processing circuit, so that the working state and the power utilization condition of the power adapter can be monitored in real time, whether the power adapter works normally or not is determined, and the safe use of the power adapter and a load powered by the power adapter can be guaranteed.
(2) In the intelligent power adapter, the number of the electric energy conversion devices and the number of the power output interfaces can be multiple, the current input by the power input interface can be output to each power output interface through each power change device, and the current input by the power input interface can also be directly output to the power output interface, wherein the electric energy conversion devices can comprise one or more of an AC/AC electric energy conversion device, an AC/DC electric energy conversion device, a DC/AC electric energy conversion device and a DC/DC electric energy conversion device, so that different alternating current and direct current signals can be obtained through the intelligent power adapter, and the intelligent power adapter is suitable for multiple devices and multiple types of devices to be used simultaneously.
(3) The intelligent power adapter also comprises a leakage current transformer, wherein the leakage current transformer is arranged on a circuit connected with the output end of the power input interface; the leakage current transformer is connected to the controller through the current processing circuit, whether the power adapter has the leakage condition or not can be detected through the leakage current transformer, and when the leakage condition exists, the controller can control the switch modules to be switched off, so that each circuit in the power adapter is not electrified, and the safe use of the power adapter is further ensured.
(4) In the intelligent power adapter, the shell is sequentially divided into the wire inlet bin, the wire distribution bin, the control bin, the mutual inductor bin, the electric energy conversion bin and the wire outlet bin from the power input interface to the power output interface, so that devices connected from the power input interface to the power output interface can be respectively stored in the bins according to functions, the structure of the intelligent power adapter is more standard and compact, and the intelligent power adapter is more convenient to overhaul.
(5) In the working process of the intelligent power adapter, the voltage or current signals acquired by the monitoring ports can realize the monitoring of whether the power adapter is electrified, undervoltage, leakage, overvoltage, leakage current and short circuit, realize the relatively comprehensive working state monitoring of the power adapter, and further ensure the safe use of the power adapter and the load for supplying power.
Drawings
Fig. 1 is a schematic diagram of the structure of the intelligent power adapter of the present invention.
FIG. 1a is a schematic diagram of a voltage processing circuit in the intelligent power adapter of the present invention.
FIG. 1b is a schematic diagram of the current handling circuitry of the intelligent power adapter of the present invention.
Fig. 2 is a circuit schematic of the intelligent power adapter of the present invention.
Fig. 3 is a schematic circuit diagram of the intelligent pole of the present invention.
Description of the drawings: 1. a power input interface; 2. an electric energy conversion device; 3. a leakage current transformer; 4. a controller; 5. a switch module; 6. a wire inlet bin; 7. a wire dividing bin; 8. a control cabin; 9. a mutual inductor bin; 10, an electric energy conversion bin; 11. an outgoing line bin; 12. a first circuit breaker; 13. a second circuit breaker; 14. a power output interface; 15. emptying the bin; 16. a current transformer.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.
Examples
The embodiment discloses an intelligent power adapter, as shown in fig. 1 and 2, which includes a power input interface 1, an electric energy conversion device 2, a power output interface 14, a voltage processing circuit, a current processing circuit, a controller 4 and a switch module 5. In this embodiment, the controller may use a control device such as a single chip microcomputer, a PLC, a DSP, or a PIC (programmable interrupt controller).
The power input interface is connected with the input end of the electric energy conversion device, and the output end of the electric energy conversion device is connected with each power output interface; a switch module is arranged on a connecting line of the power input interface and the power output interface; the switch module is connected with the controller and controls the working state of the controller; the switch module is a magnetic latching relay; in this embodiment, the number of the electric energy conversion devices may be set to be plural; the power conversion device comprises one or more of a power conversion device for converting alternating current into alternating current, a power conversion device for converting alternating current into direct current, a power conversion device for converting direct current into alternating current and a power conversion device for converting direct current into direct current, for example, as shown in fig. 1, the power conversion device comprises an AC/DC48V, an AC/DC24V and an AC/DC12V, and converts alternating current input by the power input interface into direct current of 48V, 24V and 12V respectively. In this embodiment, the number and types of the power conversion devices may be configured according to actual requirements.
In the embodiment, the switch module is a magnetic latching relay; the control circuit of each relay is connected with the controller, the working circuit is connected with a circuit between the power input interface and the power output interface, and the controller controls whether the power output interface is electrified or not by controlling the working state of the relay.
In this embodiment, the switch module uses some plate relays with small volume power, as shown in Re _1 to Re _4 in fig. 2, and the power output interface is suitable for connecting a load with power less than 2 kw.
In this embodiment, as shown in fig. 1 and 2, a leakage current transformer 3 is disposed on a bus line to which an output terminal of the power input interface is connected, and the leakage current transformer 3 is connected to the controller through a current processing circuit. The controller can detect whether the power input interface has the condition of electric leakage through the leakage current transformer 3.
In this embodiment, each voltage monitoring port of the power adapter is connected with a voltage processing circuit, and is connected with an input end of the voltage processing circuit; each current monitoring port of the power adapter is connected with a current processing circuit and is connected with the input end of the current processing circuit; in the embodiment, the voltage monitoring port of the power adapter comprises a port arranged before the input end of the power input interface and before the input end of the power output interface; the current monitoring port of the power adapter comprises a port arranged behind the output end of the power input interface and in front of the input end of the power output interface. In this embodiment, as shown in fig. 1, a voltage monitoring port and a current monitoring port are arranged on the circuit before the input end of the power output interface and before the input end of the power conversion device, that is, voltage and current signals input by each power conversion device are detected through the voltage monitoring port and the current monitoring port. In this embodiment, the voltage monitoring port and the current monitoring port of the power adapter may be set according to actual monitoring requirements.
The controller 4 is connected with the output ends of the voltage processing circuits and the current processing circuits and is used for acquiring signals output by the voltage processing circuits and the current processing circuits and then judging the working state of the power adapter and the power utilization condition of a power load supplied by the power adapter according to the signals output by the voltage processing circuits and the current processing circuits;
in the present embodiment, as shown in fig. 1a, the voltage processing circuit includes a voltage dividing circuit, a filter circuit and a voltage boosting circuit connected in sequence; the input end of a voltage division circuit of the voltage processing circuit is connected with a voltage monitoring port of the power adapter, and the output end of a booster circuit of the voltage processing circuit is connected with the controller; the voltage dividing circuit in the voltage processing circuit can be composed of a first resistor and a second resistor which are connected in series, wherein one end of the first resistor is connected with the voltage monitoring port, the other end of the first resistor is connected with one end of the second resistor and then connected with the filter circuit, and the other end of the second resistor is grounded. The booster circuit in the voltage processing circuit can be directly realized by an amplifier or can be realized by a transformer.
In this embodiment, as shown in fig. 1b, the current processing circuit includes a current transformer, a shunt circuit, a filter circuit, and a voltage boost circuit, which are connected in sequence; and the current transformers of the current processing circuit are respectively connected with the current monitoring ports of the power adapter, and the output ends of the booster circuit of the current processing circuit are respectively connected with the controller. In this embodiment, the shunt circuit in the current processing circuit is connected to the secondary side of the current transformer, the shunt circuit may be composed of a third resistor and a fourth resistor connected in series, and a connected port of the third resistor and the fourth resistor is connected to the filter circuit; the booster circuit in the current processing circuit can be directly realized by an amplifier or can be realized by a transformer. In the present embodiment, as shown in fig. 2, the current transformers 16 are respectively provided at the respective current monitoring ports of the power adapter.
In this embodiment, the controller may obtain the voltage and the current value input by the input end of each power output interface according to signals sent by the voltage processing circuit and the current processing circuit connected to the input end of each power output interface, so as to determine the power consumption condition of the load connected to each power output interface.
In this embodiment, the controller may determine, according to a voltage processing circuit connected to the input terminal of the power input interface, a power-on condition of the power adapter, and determine whether the power adapter has an undervoltage condition or an overvoltage condition.
In this embodiment, the controller may detect whether the power adapter has a leakage condition according to a leakage current transformer on a line connected to the output terminal of the power adapter. The controller can determine whether the over-current condition exists in the bus line of the power adapter or not according to the current processing circuit connected with the output end of the power adapter; the controller can determine whether the overcurrent condition exists in each branch line in the power adapter according to the current processing circuit connected with the input end of each power output interface.
In this embodiment, the controller of the intelligent power adapter may further be connected to the communication module through a 485 line, and connected to a remote terminal outside the intelligent power pole through the communication module, and the controller may receive a corresponding remote control instruction sent by the remote terminal through the communication module, for example, a working instruction for controlling the working state of each switch module; the controller can send internal information to an external terminal through the communication module, the internal information includes the working state of the power adapter judged by the controller and the power consumption condition of the power supply load supplied by the power adapter, the external terminal can be a mobile phone, a computer, a server and the like, and the communication module can be an intelligent gateway.
In this embodiment, as shown in fig. 1, the power adapter further includes a housing, and the inside of the housing sequentially includes a wire inlet bin 6, a wire distributing bin 7, a control bin 8, a transformer bin 9, an electric energy conversion bin 10, and a wire outlet bin 11 from the power input interface to the power output interface; defining a line connected with the output end of the power input interface as a bus line, and defining a line connected with each power output interface of the bus line as a branch line; wherein:
the leakage current transformer is arranged in the wire inlet bin, and the power input interface is arranged in the wire inlet bin and is exposed out of the wire inlet bin;
the connection end points of the main line of the power adapter and each branch line are arranged in the branching bin, and the branching function is realized in the branching bin;
the first switch module and the second switch module are arranged in the control cabin;
the current transformers in the current processing circuits are arranged in a transformer bin;
the electric energy conversion device is arranged in the electric energy conversion bin;
the power output interface is arranged in the wire outlet bin and exposes the wire outlet bin.
The controller can be arranged in the wire outlet bin, the wire distribution bin, the control bin, the mutual inductor bin, the electric energy conversion bin and the empty bin 15 at the side edge of the wire outlet bin, and is conveniently connected with other components.
The embodiment also discloses a working method of the intelligent power adapter, which comprises the following specific steps:
(1) the current input by the power input interface is converted into electric energy through the electric energy conversion device and is output to the power output interface after passing through the switch module; the controller controls whether the corresponding power output interface outputs current to an external load or not by controlling the working state of the switch module in front of the input end of each power output interface;
(2) voltage signals of each voltage monitoring port of the power adapter are obtained through each voltage processing circuit, and are transmitted to the controller after being processed; and voltage signals of each current monitoring port of the power adapter are obtained through each current processing circuit, processed and transmitted to the controller.
After voltage signals of each voltage monitoring port are obtained by each voltage processing circuit, voltage division, filtering and boosting processing are carried out to obtain 0-5V voltage signals which can be input to the analog input port of the controller; each current processing circuit firstly detects current signals of each current monitoring port through a current transformer, and then obtains 0-5V voltage signals which can be input into a multi-loop detection device such as a PIC chip analog input port after shunting, filtering and boosting processing. The controller can correspondingly determine the voltage and the current of each voltage monitoring port and each current monitoring port of the power adapter according to the voltage signals received by each analog port.
(3) The controller judges the working state of the power adapter according to the signals sent by the voltage processing circuit and the current processing circuit, and calculates the power consumption condition of the power load supplied by the power adapter. The method comprises the following specific steps:
(31) the controller collects signals output by the voltage processing circuit connected with the input end of each power output interface, and acquires the input voltage of each power output interface according to the signals; meanwhile, the controller collects signals output by the current processing circuit connected with the input end of each power output interface, and acquires the current input by each power output interface according to the signals; according to the voltage and current input by each power output interface, the power consumption of the load connected with each power output interface is obtained:
Figure RE-GDA0002422725360000101
wherein Qi,SThe power consumption, uout, of the load connected with the ith power output interface in the time period Si,kThe voltage is input into the input end of the ith power supply output interface acquired by the kth sampling point in the time period S; iouti,kThe current is input into the input end of the ith power supply output interface acquired by the kth sampling point in the time period S; n is a radical ofsThe total number of sampling points of the signal in the time period S;
(32) the controller determines the working state of the power adapter according to the signals sent by the voltage processing circuit and the current processing circuit, and the working state is as follows:
the controller acquires a signal output by a voltage processing circuit connected with the input end of the power input interface, acquires the voltage input by the power input interface according to the signal, and acquires a first criterion V1 according to the voltage:
Figure RE-GDA0002422725360000111
wherein N is the total number of sampling points of each sampling period T, VCC is the power supply voltage of the controller, UinkThe input voltage of the power input interface acquired for the kth sampling point;
judging whether abs (V1) is larger than zero, if yes, judging that the power adapter is in a power-on state;
judging whether abs (V1) is greater than 1.1 × N × 0.5 × VCC, if yes, judging that the power adapter has overvoltage, judging whether abs (V1) is less than 0.85 × N × 0.5 × VCC, if yes, judging that the power adapter has undervoltage;
(33) the controller acquires a signal output by a current processing circuit connected with the output end of the power input interface, acquires the current output by the power input interface according to the signal, and acquires a second judgment data V2 according to the current:
Figure RE-GDA0002422725360000112
Iinkthe output current of the power input interface acquired by the kth sampling point;
it is determined whether abs (V2) is greater than a first threshold IIshortcurrentIf so, judging that the power adapter has a short circuit condition; wherein, IIshortcurrentThe unit is ampere, and the ratio is the transformation ratio of a current transformer in a current processing circuit connected with the output end of the power input interface;
it is determined whether abs (V2) is greater than a second threshold IovercurrentIf yes, judging that the power adapter has overcurrent condition, wherein Iovercurrent-40 × N/traso in amps;
(34) the controller acquires signals output by the current processing circuit connected with the input end of each power output interface, acquires currents input by each power output interface according to the signals, and acquires signals corresponding to each third criterion V3_ i according to the currents:
Figure RE-GDA0002422725360000113
Iinki is the current input by the ith power supply output interface acquired by the kth sampling point;
it is determined whether abs (V3_ I) is greater than a third threshold value I _ IovercurrentIf yes, judging that the circuit connected with the input end of the ith power output interface has an overcurrent condition;
wherein:
I_iovercurrent＝Xi*N/Tratioi；
Figure RE-GDA0002422725360000121
Tratioithe transformation ratio of a current transformer in a current processing circuit connected with the input end of the ith power supply output interface is obtained; piThe total power of the load connected with the ith power supply output interface; u is the effective value of the input voltage of the power input interface; d is the insurance coefficient.
In this embodiment, if the commercial power is connected to the power input interface of the intelligent power adapter, U is 220V. In the present embodiment, the safety factor d may be set to 0.5 to 0.9, for example, to 0.8.
(35) The controller collects signals output by a current processing circuit connected with the leakage current transformer, obtains the current output by the leakage current transformer according to the signals, and obtains a corresponding fourth criterion V4 according to the current:
Figure RE-GDA0002422725360000122
Irckthe current output by the leakage current transformer acquired at the kth sampling point;
determining whether abs (V4) is greater than 0.2N/Transior，TratiorIs the transformation ratio of the leakage current transformer.
In this embodiment, there is no precedence order in the above-mentioned (31) to (35), and the execution may be performed in any precedence order or simultaneously.
This embodiment also discloses an intelligent pole, as shown in fig. 3, including the above-mentioned intelligent power adapter of this embodiment, above-mentioned intelligent power adapter sets up the inside at the intelligent pole.
The intelligent electric pole also comprises a first circuit breaker 13 with leakage protection, an alternating current lightning protection circuit and one or more second circuit breakers 12, and the working state of the intelligent electric pole is controlled by a controller;
a line connected to the outside of the intelligent electric pole is sequentially connected with a first circuit breaker 13 with leakage protection and an alternating current lightning protection circuit and then is connected with a power input interface of the intelligent power adapter; in this embodiment, the leakage current operation value of the first circuit breaker 13 with leakage protection is 30mA, and the operation is performed when the internal leakage is greater than 30 mA.
In the intelligent power adapter, each power output interface is correspondingly connected with each second circuit breaker 12 respectively, and is correspondingly connected with each external load of the intelligent electric pole after passing through each second circuit breaker 12. In this embodiment, through the inside second circuit breaker 12 of pole, intelligent power adapter's external circuit breaker promptly, can realize obvious breaking point, the safety inspection of guarantee circuit.
In this embodiment, the intelligent electric pole can realize multiple functions such as remote switching, field maintenance, short-circuit protection, earth leakage protection of the intelligent electric pole through the mutual cooperation between the first circuit breaker 13 with earth leakage protection of incoming line, the power adapter internal switch module, namely, the plate relay, the second circuit breaker 12.
In this embodiment, the controller of the intelligent power adapter may further be connected to the communication module through a 485 line, and connected to a remote terminal outside the intelligent power pole through the communication module, and the controller may receive a corresponding remote control instruction sent by the remote terminal through the communication module, for example, a working instruction for controlling the working state of each switch module; the controller can send internal information to the external terminal through the communication module, wherein the internal information includes the working state of the power adapter judged by the controller and the power utilization condition of the power load supplied by the power adapter.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims (10)

1. An intelligent power adapter is characterized by comprising a controller, a power input interface, a power output interface, an electric energy conversion device, a switch module, a voltage processing circuit and a current processing circuit;
the power input interface is connected with the input end of the electric energy conversion device, and the output end of the electric energy conversion device is connected with each power output interface; a switch module is arranged on a connecting line of the power input interface and the power output interface; the switch module is connected with the controller and controls the working state of the controller; the switch module is a magnetic latching relay;
each voltage monitoring port of the power adapter is connected with a voltage processing circuit and is connected with the input end of the voltage processing circuit; each current monitoring port of the power adapter is connected with a current processing circuit and is connected with the input end of the current processing circuit;
the controller is connected with the output ends of the voltage processing circuits and the current processing circuits and is used for acquiring signals output by the voltage processing circuits and the current processing circuits and then judging the working state of the power adapter and the power utilization condition of a power supply load supplied by the power adapter according to the signals output by the voltage processing circuits and the current processing circuits;
the voltage monitoring port of the power adapter comprises a port arranged before the input end of the power input interface and a port arranged before the input end of the power output interface; the current monitoring port of the power adapter comprises a port arranged behind the output end of the power input interface and in front of the input end of the power output interface.
2. The intelligent power adapter according to claim 1, wherein the number of the power conversion devices is plural;
the power input interface is respectively connected to the input end of each electric energy conversion device through each switch module, and the output end of each electric energy conversion device is correspondingly connected with each power output interface;
the electric energy conversion device comprises one or more of an electric energy conversion device for converting alternating current into alternating current, an electric energy conversion device for converting alternating current into direct current, an electric energy conversion device for converting direct current into alternating current and an electric energy conversion device for converting direct current into direct current.
3. The intelligent power adapter as claimed in claim 1, wherein the controller is connected with a communication module, and communicates with an external terminal through the communication module.
4. The intelligent power adapter according to claim 1, further comprising a leakage current transformer disposed on a line to which an output terminal of the power input interface is connected;
the leakage current transformer is connected to the controller through a current processing circuit.
5. The intelligent power adapter according to claim 4, further comprising a housing, wherein the housing comprises a wire inlet bin, a wire splitting bin, a control bin, a mutual inductor bin, an electric energy conversion bin and a wire outlet bin from a power input interface to a power output interface in sequence;
defining a line connected with the output end of the power input interface as a bus line, and defining a line connected with each power output interface of the bus line as a branch line; wherein:
the leakage current transformer is arranged in the wire inlet bin, and the power input interface is arranged in the wire inlet bin and is exposed out of the wire inlet bin;
the connection end points of the main line of the power adapter and each branch line are arranged in the branch bin;
the switch module is arranged in the control bin;
the current transformers in the current processing circuits are arranged in a transformer bin;
the electric energy conversion device is arranged in the electric energy conversion bin;
the power output interface is arranged in the wire outlet bin and exposes the wire outlet bin.
6. An operating method of the intelligent power adapter according to any one of claims 1 to 5, characterized by comprising the following steps:
the current input by the power input interface is converted into electric energy through the electric energy conversion device and is output to the power output interface after passing through the switch module;
the controller controls whether the corresponding power output interface outputs current or not by controlling the working state of the switch module at the input end of each power output interface;
voltage signals of each voltage monitoring port of the power adapter are obtained through each voltage processing circuit, and are transmitted to the controller after being processed;
voltage signals of each current monitoring port of the power adapter are obtained through each current processing circuit and are transmitted to the controller after being processed;
the controller judges the working state of the power adapter according to the signals sent by the voltage processing circuit and the current processing circuit, and calculates the power utilization condition of the load supplied by the power adapter.
7. The operating method of the intelligent power adapter according to claim 6, wherein the controller determines the power consumption of the load supplied by the power adapter according to the signals sent by the voltage processing circuit and the current processing circuit, specifically as follows:
the controller collects signals output by the voltage processing circuit connected with the input end of each power output interface, and acquires the input voltage of each power output interface according to the signals; meanwhile, the controller collects signals output by the current processing circuit connected with the input end of each power output interface, and acquires the current input by each power output interface according to the signals; according to the voltage and current input by each power output interface, the power consumption of the load connected with each power output interface is obtained:
Figure FDA0002370385880000031
wherein Qi,SThe power consumption, uout, of the load connected with the ith power output interface in the time period Si,kThe voltage is input into the input end of the ith power supply output interface acquired by the kth sampling point in the time period S; iouti,kThe current is input into the input end of the ith power supply output interface acquired by the kth sampling point in the time period S; n is a radical ofsThe total number of sampling points of the signal in the time period S;
the controller determines the working state of the power adapter according to the signals sent by the voltage processing circuit and the current processing circuit, and the working state is as follows:
the controller acquires a signal output by a voltage processing circuit connected with the input end of the power input interface, acquires the voltage input by the power input interface according to the signal, and acquires a first criterion V1 according to the voltage:
Figure FDA0002370385880000032
wherein N is the total number of sampling points of each sampling period T, VCC is the power supply voltage of the controller, UinkThe input voltage of the power input interface acquired for the kth sampling point;
judging whether abs (V1) is larger than zero, if yes, judging that the power adapter is in a power-on state;
judging whether abs (V1) is greater than 1.1 × N × 0.5 × VCC, if yes, judging that the power adapter has overvoltage, judging whether abs (V1) is less than 0.85 × N × 0.5 × VCC, if yes, judging that the power adapter has undervoltage;
the controller acquires a signal output by a current processing circuit connected with the output end of the power input interface, acquires the current output by the power input interface according to the signal, and acquires a second judgment data V2 according to the current:
Figure FDA0002370385880000033
Iinkthe output current of the power input interface acquired by the kth sampling point;
it is determined whether abs (V2) is greater than a first threshold IIshortcurrentIf so, judging that the power adapter has a short circuit condition; wherein, IIshortcurrentThe unit is ampere, and the ratio is the transformation ratio of a current transformer in a current processing circuit connected with the output end of the power input interface;
it is determined whether abs (V2) is greater than a second threshold IovercurrentIf yes, judging that the power adapter has overcurrent condition, wherein Iovercurrent-40 × N/traso in amps;
the controller acquires signals output by the current processing circuit connected with the input end of each power output interface, acquires currents input by each power output interface according to the signals, and acquires signals corresponding to each third criterion V3_ i according to the currents:
Figure FDA0002370385880000041
Iinki is the current input by the ith power supply output interface acquired by the kth sampling point;
it is determined whether abs (V3_ I) is greater than a third threshold value I _ IovercurrentIf yes, judging that the circuit connected with the input end of the ith power output interface has an overcurrent condition;
wherein:
I_iovercurrent＝Xi*N/Tratioi；
Figure FDA0002370385880000042
Tratioithe transformation ratio of a current transformer in a current processing circuit connected with the input end of the ith power supply output interface is obtained; piThe total power of the load connected with the ith power supply output interface; u is the effective value of the input voltage of the power input interface; d is the insurance coefficient;
the controller collects signals output by a current processing circuit connected with the leakage current transformer, obtains the current output by the leakage current transformer according to the signals, and obtains a corresponding fourth criterion V4 according to the current:
Figure FDA0002370385880000043
Irckthe current output by the leakage current transformer acquired at the kth sampling point;
determining whether abs (V4) is greater than 0.2N/Transior，TratiorIs the transformation ratio of the leakage current transformer.
8. An intelligent pole, comprising the intelligent power adapter of any one of claims 1 to 5, the intelligent power adapter being disposed inside the intelligent pole.
9. The intelligent pole as recited in claim 8, further comprising a first breaker with leakage protection and an ac lightning protection circuit;
the circuit that intelligent pole outside was inserted connects gradually the power input interface who connects intelligent power adapter behind first circuit breaker of connecting band and the exchange lightning protection circuit.
10. The intelligent pole as recited in claim 8, further comprising one or more second circuit breakers; each second circuit breaker is connected with the controller and works according to the working state of the controller;
and each power output interface of the intelligent power adapter is correspondingly connected with each second circuit breaker respectively, and is correspondingly connected with the external load of the intelligent electric pole after passing through each second circuit breaker.
CN202010048842.XA 2020-01-16 2020-01-16 Intelligent power adapter and working method thereof, and intelligent electric pole Pending CN111162662A (en)

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