CN109149934A - A kind of DC grid buck charging pile system - Google Patents
A kind of DC grid buck charging pile system Download PDFInfo
- Publication number
- CN109149934A CN109149934A CN201811028772.0A CN201811028772A CN109149934A CN 109149934 A CN109149934 A CN 109149934A CN 201811028772 A CN201811028772 A CN 201811028772A CN 109149934 A CN109149934 A CN 109149934A
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- Prior art keywords
- direct current
- charging pile
- control unit
- connect
- main control
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/157—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators with digital control
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Dc-Dc Converters (AREA)
Abstract
A kind of DC grid buck charging pile system, is related to charging pile field.Including direct current gauze power supply system, direct current input charging pile and dropping equipment, dropping equipment includes main control unit, analog-to-digital conversion module and IGBT module Q, filter circuit, Current Voltage sensor and the DC relay S being connected in turn between direct current gauze power supply system and direct current input charging pile；Current Voltage sensor is connect with analog-to-digital conversion module, and analog-to-digital conversion module is connect with main control unit, and IGBT module Q is connected to the output end of main control unit by IGBT drive circuit；The control terminal of the DC relay S is connect with main control unit.The present invention is by sampling input voltage and electric current, by being compared with input threshold value and controlling the duty ratio size of IGBT drive circuit, direct current can be protected to input charging pile in the reduction input voltage in effective time range.
Description
Technical field
The present invention relates to charging pile field, specially a kind of discharge type direct current gauze power supply system charging pile system.
Background technique
Rail/trolleybus is a kind of time-honored public transport, currently still have many cities retain rails/
Trolleybus, and technically continuously improve.
Because rail/trolleybus power supply is usually direct current, ac transmission overhead transmission line generallys use 3 conducting wires,
And direct current only needs 1 (monopole) or 2 (bipolar) conducting wires.Therefore, direct current transportation can save a large amount of power transmission materials, while can also subtract
Few a large amount of transport, installation fee, domestic some big and medium-sized cities also retain rail/trolleybus direct current gauze at present.With state
Family increases the investment to new energy industry, and charging pile construction is also more and more, builds in some powerful charging pile stations
High pressure access is needed in journey to solve the problems, such as distribution, investment is very big, has both saved fund using existing direct current gauze to power
Investment, also improves the utilization rate of resource.
At home, the power supply of general direct current gauze is that three-phase AC380V+-10% is obtained by diode uncontrollable rectifier, is provided
The power voltage supply range of direct current gauze be DC580-710V, the direct current input range of charging pile module domestic at present exists
Between DC400-740V, meet the power reguirements of charging pile.But power grid electricity consumption enters low ebb, the electricity of gauze generally after morning
Pressure can increase, perhaps higher more than DC740V sometimes to cause charging pile module protection or overvoltage damage；Meanwhile if
The direct current gauze and rail/trolleybus of charging system share, between the direct current gauze runtime, had on line more rails/
Energy back to power grid can be caused the DC voltage of power grid to be more than by trolleybus operation when electric car brake
The DC740V perhaps higher power module protection or overvoltage damage caused in direct-current charging post, also be easy to cause charging pile
Other electrical equipments damage in system.
Summary of the invention
The object of the present invention is to provide a kind of charging pile systems being powered using existing electric car direct current gauze, in prime
A kind of dropping equipment and its control strategy are developed in input, and to solve, input direct-current voltage is unstable to be easy to cause charging pile system
The problem of the case where electrical equipment in system damages, the effective charging pile system reliability service guaranteed in direct current gauze.
Realizing the technical solution of above-mentioned purpose is: a kind of DC grid buck charging pile system, it is characterised in that: straight
Streamline net power supply system, direct current input charging pile and dropping equipment, the dropping equipment include main control unit, analog-to-digital conversion mould
Block and the IGBT module Q being connected in turn between direct current gauze power supply system and direct current input charging pile, filter circuit, electricity
Galvanic electricity pressure sensor and DC relay S, the voltage that wherein IGBT module Q is used to provide direct current gauze power supply system carry out
Copped wave；
The Current Voltage sensor is connect with analog-to-digital conversion module, and the analog-to-digital conversion module is connect with main control unit, described
IGBT module Q is connected to the output end of main control unit by IGBT drive circuit；The control terminal and master control of the DC relay S
Unit connection；
Analog-to-digital conversion module is used to that the electric current of acquisition, voltage analog signal to be converted to digital signal and are sent to main control unit,
Control unit is for being analyzed and being recorded to the voltage and current signals of input and send control letter to IGBT drive circuit
Number, IGBT drive circuit is used to receive the control signal of main control unit transmission and sends PWM drive signal to IGBT module Q.
Further, the filter circuit includes outputting inductance L and capacitor C, one end and the IGBT module Q of outputting inductance L
The connection of the pole E, the anode of the pole the C connection direct current gauze power supply system of IGBT module Q, the other end of outputting inductance L and capacitor C
Anode connection, the cathode of capacitor C connect with the cathode of direct current gauze power supply system.
Further, the Current Voltage sensor includes current sensor CS and voltage sensor VS, and the electric current passes
One end of sensor CS is connect with outputting inductance L, the other end is connect with one end of voltage sensor VS, DC relay S respectively, electricity
The other end of pressure sensor VS is connect with the cathode of direct current gauze power supply system.
The working principle of the invention
A, when the output DC voltage of direct current gauze power supply system in the normal range, analog-to-digital conversion module to sampled signal processing
Afterwards, data are sent to main control unit, main control unit sends IGBT drive circuit work order after calculating, and IGBT drives at this time
Circuit provides full conducting driving signal, and IGBT module Q is straight-through, and direct current inputs the input voltage of charging pile and the power supply of direct current gauze is
The output DC voltage of system is equal, and DC relay S is in attracting state at this time.
B, when the threshold value, simultaneously that the output DC voltage of direct current gauze power supply system is more than direct current input charging pile input voltage
Higher than dropping equipment starting threshold value when, dropping equipment start work simultaneously to direct current input charging pile input dc power press carry out
Pressure stabilizing.Detailed process are as follows: firstly, sending data to main control unit, main control unit after analog-to-digital conversion module is to sampled signal processing
IGBT drive circuit work order is sent after calculating, IGBT drive circuit provides PWM drive signal, IGBT module Q at this time
It starts to work, when the output direct current of direct current gauze power supply system constantly increases, IGBT drive circuit provides PWM drive signal
Duty ratio, which can be continuously increased, achievees the purpose that voltage stabilization, when the output direct current of direct current gauze power supply system declines but is higher than decompression
When the starting threshold value of device, the duty ratio that IGBT drive circuit provides PWM drive signal, which can constantly reduce, reaches voltage stabilization
Purpose.
Beneficial effects of the present invention
The present invention is by sampling input voltage and electric current, by being compared and with input threshold value to IGBT drive circuit
Duty ratio size controlled, can in the reduction input voltage in effective time range, protect direct current input charging pile.
Detailed description of the invention
Fig. 1 is control principle drawing of the invention.
Specific embodiment
As shown in Figure 1, the present invention includes direct current gauze power supply system 101, direct current input charging pile 100 and dropping equipment
105, dropping equipment 105 is including main control unit 103, analog-to-digital conversion module 104 and is connected to direct current gauze power supply system in turn
101 and direct current input charging pile 100 between IGBT module Q, filter circuit 106, Current Voltage sensor 107 and direct current after
Electric appliance S, main control unit 103 described in the present embodiment use MCU micro-chip processor, specific model are as follows: LPC1766.
Current Voltage sensor 107 is connect with analog-to-digital conversion module 104, and analog-to-digital conversion module 104 and main control unit 103 connect
It connects, the pole G of IGBT module Q is connected to the output end of main control unit 103, the DC relay S by IGBT drive circuit 102
Control terminal connect with main control unit 103.
Analog-to-digital conversion module 104 is for being converted to digital signal for the electric current of acquisition, voltage analog signal and being sent to master
Unit 103 is controlled, control unit 103 is for being analyzed and being recorded to the voltage and current signals of input and drive electricity to IGBT
Road 102 sends control signal, and IGBT drive circuit 102 is used to receive the control signal of the transmission of main control unit 103 and to IGBT mould
Block Q sends PWM drive signal.
Filter circuit 106 includes outputting inductance L and capacitor C, and one end of outputting inductance L is connect with the pole E of IGBT module Q,
The anode of the pole the C connection direct current gauze power supply system of IGBT module Q, the other end of outputting inductance L are connect with the anode of capacitor C,
The cathode of capacitor C is connect with the cathode of direct current gauze power supply system 101.
Current Voltage sensor 107 include current sensor CS and voltage sensor VS, one end of current sensor CS with
Outputting inductance L connection, the other end are connect with one end of voltage sensor VS, DC relay S respectively, and voltage sensor VS's is another
One end is connect with the cathode of direct current gauze power supply system 101.
The DC relay S's is serially connected between current sensor CS and the positive terminal of direct current input charging pile 100.
The working principle of the invention
A, when the output DC voltage of direct current gauze power supply system 101 in the normal range, analog-to-digital conversion module 104 pairs of samplings letter
After number processing, data are sent to main control unit 103, main control unit 103 sends IGBT drive circuit work order after calculating
102, IGBT drive circuit 102 provides full conducting driving signal at this time, and IGBT module Q is straight-through, and direct current inputs the defeated of charging pile 100
It is equal with the output DC voltage of direct current gauze power supply system 100 to enter voltage, DC relay S is in attracting state at this time.
B, when the output DC voltage of direct current gauze power supply system 101 is more than direct current input charging pile input voltage 100
Threshold value, and be higher than dropping equipment 105 starting threshold value when, dropping equipment start work simultaneously to direct current input charging pile input it is straight
Galvanic electricity pressure carries out pressure stabilizing.Detailed process are as follows: firstly, sending data to master control after analog-to-digital conversion module 104 is to sampled signal processing
Unit 103, main control unit 103 send 102 work order of IGBT drive circuit after calculating, at this time IGBT drive circuit 102
PWM drive signal is provided, IGBT module Q starts to work, when the output direct current of direct current gauze power supply system 101 constantly increases,
The duty ratio that IGBT drive circuit 102 provides PWM drive signal, which can be continuously increased, achievees the purpose that voltage stabilization, when direct current gauze
When the output direct current of power supply system 101 declines but is higher than the starting threshold value 1 of dropping equipment, IGBT drive circuit 102 provides PWM and drives
The duty ratio of dynamic signal, which can constantly reduce, achievees the purpose that voltage stabilization.
Claims (3)
1. a kind of DC grid buck charging pile system, it is characterised in that: inputted including direct current gauze power supply system, direct current
Charging pile and dropping equipment, the dropping equipment include main control unit, analog-to-digital conversion module and are connected to direct current gauze in turn
IGBT module Q, filter circuit, Current Voltage sensor and DC relay between power supply system and direct current input charging pile
S, the voltage that wherein IGBT module Q is used to provide direct current gauze power supply system carry out copped wave；
The Current Voltage sensor is connect with analog-to-digital conversion module, and the analog-to-digital conversion module is connect with main control unit, described
IGBT module Q is connected to the output end of main control unit by IGBT drive circuit；The control terminal and master control of the DC relay S
Unit connection；
Analog-to-digital conversion module is used to that the electric current of acquisition, voltage analog signal to be converted to digital signal and are sent to main control unit,
Control unit is for being analyzed and being recorded to the voltage and current signals of input and send control letter to IGBT drive circuit
Number, IGBT drive circuit is used to receive the control signal of main control unit transmission and sends PWM drive signal to IGBT module Q.
2. a kind of DC grid buck charging pile system according to claim 1, it is characterised in that: the filtered electrical
Road includes outputting inductance L and capacitor C, and one end of outputting inductance L is connect with the pole E of IGBT module Q, and the pole C of IGBT module Q connects
The anode of direct current gauze power supply system is connect, the other end of outputting inductance L is connect with the anode of capacitor C, the cathode and direct current of capacitor C
The cathode of gauze power supply system connects.
3. a kind of DC grid buck charging pile system according to claim 2, it is characterised in that: the electric current electricity
Pressure sensor includes current sensor CS and voltage sensor VS, one end of the current sensor CS connect with outputting inductance L,
The other end is connect with one end of voltage sensor VS, DC relay S respectively, the other end and direct current gauze of voltage sensor VS
The cathode of power supply system connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811028772.0A CN109149934A (en) | 2018-09-05 | 2018-09-05 | A kind of DC grid buck charging pile system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811028772.0A CN109149934A (en) | 2018-09-05 | 2018-09-05 | A kind of DC grid buck charging pile system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109149934A true CN109149934A (en) | 2019-01-04 |
Family
ID=64826954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811028772.0A Pending CN109149934A (en) | 2018-09-05 | 2018-09-05 | A kind of DC grid buck charging pile system |
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| Country | Link |
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| CN (1) | CN109149934A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6031359A (en) * | 1996-10-10 | 2000-02-29 | Chartec Laboratories A/S | Digitally controlled switch mode power supply for charging rechargeable batteries |
| CN103607006A (en) * | 2013-11-15 | 2014-02-26 | 中科恒源科技股份有限公司 | A charging and discharging reuse circuit |
| CN205646993U (en) * | 2016-05-16 | 2016-10-12 | 泰州学院 | Intelligent charging stake of solar energy power supply |
| CN106026274A (en) * | 2016-06-30 | 2016-10-12 | 武汉中直电气股份有限公司 | High-power charging circuit and apparatus |
| CN106849242A (en) * | 2017-02-24 | 2017-06-13 | 国网上海市电力公司 | A kind of charge control module of portable charger baby battery management system |
| CN107054258A (en) * | 2015-12-03 | 2017-08-18 | 福特全球技术公司 | Distributed using the vehicle electrical power of the relay with integrated electric pressure converter |
| CN107565543A (en) * | 2017-09-07 | 2018-01-09 | 湖南利能科技股份有限公司 | A kind of control method of DC energy source router and micro-grid system |
| CN208904888U (en) * | 2018-09-05 | 2019-05-24 | 国充充电科技江苏股份有限公司 | A kind of DC grid buck charging pile system |
-
2018
- 2018-09-05 CN CN201811028772.0A patent/CN109149934A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6031359A (en) * | 1996-10-10 | 2000-02-29 | Chartec Laboratories A/S | Digitally controlled switch mode power supply for charging rechargeable batteries |
| CN103607006A (en) * | 2013-11-15 | 2014-02-26 | 中科恒源科技股份有限公司 | A charging and discharging reuse circuit |
| CN107054258A (en) * | 2015-12-03 | 2017-08-18 | 福特全球技术公司 | Distributed using the vehicle electrical power of the relay with integrated electric pressure converter |
| CN205646993U (en) * | 2016-05-16 | 2016-10-12 | 泰州学院 | Intelligent charging stake of solar energy power supply |
| CN106026274A (en) * | 2016-06-30 | 2016-10-12 | 武汉中直电气股份有限公司 | High-power charging circuit and apparatus |
| CN106849242A (en) * | 2017-02-24 | 2017-06-13 | 国网上海市电力公司 | A kind of charge control module of portable charger baby battery management system |
| CN107565543A (en) * | 2017-09-07 | 2018-01-09 | 湖南利能科技股份有限公司 | A kind of control method of DC energy source router and micro-grid system |
| CN208904888U (en) * | 2018-09-05 | 2019-05-24 | 国充充电科技江苏股份有限公司 | A kind of DC grid buck charging pile system |
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