CN115236373A - Aging test system for alternating current charging pile - Google Patents

Aging test system for alternating current charging pile Download PDF

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Publication number
CN115236373A
CN115236373A CN202210735516.5A CN202210735516A CN115236373A CN 115236373 A CN115236373 A CN 115236373A CN 202210735516 A CN202210735516 A CN 202210735516A CN 115236373 A CN115236373 A CN 115236373A
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China
Prior art keywords
mos tube
current
tested
unit
alternating
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Pending
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CN202210735516.5A
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Chinese (zh)
Inventor
邹曙
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Shenzhen Huasheng Zhiyuan Technology Co ltd
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Shenzhen Huasheng Zhiyuan Technology Co ltd
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Priority to CN202210735516.5A priority Critical patent/CN115236373A/en
Publication of CN115236373A publication Critical patent/CN115236373A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
    • G01R1/206—Switches for connection of measuring instruments or electric motors to measuring loads
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • 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
    • G01R31/003—Environmental or reliability tests
    • 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
    • G01R31/42—AC power supplies
    • 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
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations

Abstract

The invention provides an aging test system of an alternating current charging pile, which comprises a plurality of tested alternating current charging piles connected in series with commercial power, an AC-DC unit, a high-frequency isolation type DC-DC unit and a DC-AC unit, wherein the AC-DC unit is connected with the other ends of the tested alternating current charging piles connected in series relative to the commercial power; the system also comprises a switch circuit which is connected with the tested alternating current charging piles in series in parallel; the switch circuit comprises a plurality of control switches which are connected with the tested AC charging piles in parallel and used for realizing parallel protection and bad switching; the device also comprises a voltage and current detection and relay control unit for current detection and switch control, and in the practical application process, a plurality of tested alternating current charging piles connected in series can carry out short-circuit treatment through relays connected in parallel, so that the single protection is realized, and the application effect is remarkable.

Description

Aging test system for alternating current charging pile
[ technical field ]
The invention relates to the technical field of aging tests of alternating-current charging piles, in particular to an aging test system of an alternating-current charging pile with a remarkable application effect.
[ background art ]
With the increasing popularity of electric vehicles, charging devices associated therewith have also been rapidly developed and applied.
The alternating current charging pile is used for slowly charging the electric automobile and is a power supply device for providing an alternating current power supply for a vehicle-mounted charger of the electric automobile. The essence of the device is that the device is provided with a controlled socket and is provided with a human-computer interaction interface, a card reader, a printer and other peripherals. In order to guarantee charging safety, the charging device further comprises an emergency stop charging button, an output overcurrent protection function, an electric leakage protection function, a flame retardant function and the like.
Because the incident power consumption is safe, in order to guarantee the quality of the produced alternating-current charging piles, manufacturing enterprises of the alternating-current charging piles need to carry out aging test on each alternating-current charging pile, namely, the commercial power is introduced and the on-load test is carried out, and the general aging test time needs more than 2 hours.
The existing aging test method is that the output end of each alternating current charging pile is connected with a resistance load box. Because the power of alternating-current charging stake is generally more than 7kW, therefore the power of resistive load case is more than 7kW in addition, and during aging test, resistive load changes commercial power consumption into heat and discharges. If one aging system ages 10 alternating-current charging piles simultaneously, electricity is consumed by 70 degrees every hour, and in this way, electric energy is wasted greatly.
In addition, the load current waveform of the resistive load completely follows the voltage waveform of the commercial power, and the load connected when the charging pile is actually used is not necessarily a pure resistive load, and comprises an inductive load, a capacitive load, a rectifying load and the like. Although such a non-linear load can also be formed by combining a resistor, a capacitor, an inductor and a rectifier bridge, since the power of the load needs to be adjusted, many switches are needed, and the above devices are complicated to combine, and the load cannot be adjusted in a stepless manner, so that the use is very inconvenient.
[ summary of the invention ]
In order to overcome the problems in the prior art, the invention provides the aging test system for the alternating current charging pile with a remarkable application effect.
The technical scheme for solving the technical problem is to provide an aging test system for an alternating current charging pile, which comprises a plurality of tested alternating current charging piles connected in series with a mains supply, an AC-DC unit, a high-frequency isolation type DC-DC unit and a DC-AC unit, wherein the AC-DC unit is connected with the other ends of the tested alternating current charging piles connected in series relative to the mains supply; the output end of the DC-AC unit is connected to the connection part of the commercial power and the tested AC charging pile, namely the input end of the tested AC charging pile; the switching circuit is connected with the tested alternating current charging piles in series in parallel; the switch circuit comprises a plurality of control switches which are connected with the tested alternating current charging piles in parallel and used for realizing parallel protection and bad switching; the device also comprises a voltage and current detection and relay control unit for current detection and switch control.
Preferably, the plurality of the tested ac charging piles connected in series are also connected in series with a sensor for detecting a voltage or current signal output by the tested ac charging pile, and transmitting the signal to the voltage and current detection and relay control unit to judge whether the tested ac charging pile has a fault or not.
Preferably, the AC-DC unit includes a MOS transistor Q1, a MOS transistor Q2, a MOS transistor Q3, a MOS transistor Q4, a capacitor C1, and a load simulation controller; the S level of the MOS tube Q1 is connected with the D level of the MOS tube Q3; the S stage of the MOS tube Q2 is connected with the D stage of the MOS tube Q4; two ends of the capacitor C1 are respectively connected with the D-stage of the MOS transistor Q2 and the S-stage of the MOS transistor Q4; the load simulation controller comprises a phase discriminator, a waveform generator and a current controller.
Preferably, the DC-DC unit is a DC-to-DC converter; the direct current converter comprises an MOS tube Q1, an MOS tube Q2, an MOS tube Q3, an MOS tube Q4, a diode D1, a diode D2, a diode D3, a diode D4 and a capacitor C2; the MOS tube Q1, the MOS tube Q2, the MOS tube Q3 and the MOS tube Q4 are connected with the diode D1, the diode D2, the diode D3 and the diode D4 through a transformer T1; the transformer also comprises a capacitor C1 connected with the primary winding of the transformer T1.
Preferably, the DC-AC unit includes a MOS transistor Q1, a MOS transistor Q2, a MOS transistor Q3, a MOS transistor Q4, and a follower with a power factor of 1; the S stage of the MOS tube Q1 is connected with the D stage of the MOS tube Q3; the S level of the MOS tube Q2 is connected with the D level of the MOS tube Q4; and two ends of the capacitor C1 are respectively connected with the D-stage of the MOS transistor Q2 and the S-stage of the MOS transistor Q3.
Preferably, the sensor is a voltage sensor or a current sensor.
Preferably, the MOS transistor Q1, the MOS transistor Q2, the MOS transistor Q3, and the MOS transistor Q4 are N-channel MOS transistors.
Preferably, the phase discriminator calculates a real-time phase of the AC voltage according to an input AC voltage instantaneous value, and sends the real-time phase to the waveform generator, the input voltage signal of the phase detector is subjected to second-order generalized integral to construct two orthogonal signals, the two orthogonal signals are converted by park, the two orthogonal signals are converted from a stationary coordinate system to a rotating coordinate system to obtain D and Q signals, and finally the D and Q signals are phase-locked by the voltage controlled oscillator.
Preferably, the waveform generator performs phase shift processing according to the type of the required analog load to obtain a current waveform reference value required to be simulated, and the waveform reference value is used as an input signal of the current controller; the input signal is calculated by the current controller to obtain driving signals of an MOS tube Q1, an MOS tube Q2, an MOS tube Q3 and an MOS tube Q4 in the main circuit, so that the actual current waveform of the AC side is controlled; the input of the current controller is an alternating current signal, and a repetitive controller is added in a control loop and used for ensuring the control effect.
Preferably, the adjacent tested alternating current charging piles are connected with each other through a docking device; the butt joint device comprises a butt joint main machine body, a first butt joint and a second butt joint, wherein the first butt joint and the second butt joint are positioned at two ends of the butt joint main machine body; the first butt joint and the second butt joint are respectively connected with the gun heads of the two adjacent tested alternating current charging piles.
The beneficial effect of this application is as follows:
compared with the prior art, the aging test system for the alternating current charging pile is characterized in that a plurality of serially connected tested alternating current charging piles connected with a mains supply, an AC-DC unit, a high-frequency isolation type DC-DC unit and a DC-AC unit which are connected with the tested alternating current charging piles connected in series relative to the other end of the mains supply are arranged at the same time, the output ends of the DC-AC units are connected to the connection parts of the mains supply and the tested alternating current charging piles, namely the input ends of the tested alternating current charging piles, and the aging test system further comprises a switch circuit which is connected with the tested alternating current charging piles connected in series and in parallel, wherein the switch circuit comprises a plurality of control switches which are connected with the tested alternating current charging piles in parallel and used for realizing parallel protection and poor switching, and a voltage current detection and relay control unit used for current detection and switch control.
[ description of the drawings ]
Fig. 1 is a schematic diagram of a system application architecture of an aging test system for an ac charging pile according to the present invention.
Fig. 2 is a schematic circuit diagram of an AC-DC unit in the aging test system for the AC charging pile of the present invention.
Fig. 3 is a specific control block diagram of the phase detector in the AC-DC unit in which the first bidirectional power supply is a medium.
Fig. 4 is a schematic diagram of the application state of the waveform generator in the AC-DC unit as the first bidirectional power source.
Fig. 5 is a schematic circuit diagram of the first bi-directional power supply being a current controller in an AC-DC unit.
Fig. 6 is a schematic circuit connection diagram of a dc converter in an ac charging pile aging test system according to the present invention.
Fig. 7 is a schematic circuit connection diagram of a DC-AC unit in the aging test system for the AC charging pile of the present invention.
Fig. 8 is a schematic connection diagram of a control loop corresponding to the DC-AC unit.
[ detailed description of the invention ]
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Referring to fig. 1 to 8, an aging test system 1 for an AC charging pile according to the present invention includes a plurality of series-connected AC charging piles connected to a utility power, an AC-DC unit connected to the other ends of the series-connected AC charging piles opposite to the utility power, a high-frequency isolated DC-DC unit, and a DC-AC unit; the output end of the DC-AC unit is connected to the connection part of the commercial power and the tested AC charging pile, namely the input end of the tested AC charging pile; the switching circuit is connected with the tested alternating current charging piles in series in parallel; the switch circuit comprises a plurality of control switches which are connected with the tested AC charging piles in parallel and used for realizing parallel protection and bad switching; the device also comprises a voltage and current detection and relay control unit for current detection and switch control.
This application is through setting up a plurality of series connection's that are connected with the commercial power simultaneously by the measuring AC charging stake, with a plurality of series connection by the measuring AC charging stake for AC-DC unit, high frequency isolated form DC-DC unit and DC-AC unit that the other end of commercial power is connected, the output of DC-AC unit inserts the commercial power with the connecting part of measuring AC charging stake, promptly the input of measuring AC charging stake still include with a plurality of series connection by the measuring AC charging stake mutual parallel connection's switch circuit, switch circuit includes a plurality of and each the measuring AC charging stake mutual parallel connection, be used for realizing the control switch of parallel protection and bad switching, still including voltage current detection and the relay control unit that is used for carrying out current detection and on-off control, in the practical application process, this application passes through the series connection of a plurality of charging stake modules, share a load, greatly reduced the cost and the electric energy loss of load, through energy-saving electronic load, with load power in the electric wire netting, also further reduced the loss of electric energy, through the control to the input of electronic load, can simulate the load of different nature, the load resistive nature, the load is compared, the aging effect of the pure RLC, the while is adjusted, the more the stepless test, the efficiency is strengthened.
The present application does not specifically limit the type and model of each functional component.
The utility model provides an aging testing system supplies n alternating-current charging stake aging testing simultaneously, n alternating-current charging stake's input-output establishes ties in proper order, the commercial power supplies power for filling electric pile 1 promptly, the output that fills electric pile 1 is connected to the input that fills electric pile 2, the input of alternating current repayment electronic load is received to the output that fills electric pile n at last, alternating current repayment electronic load is after the electric energy transform, the output merges the commercial power into.
Connect a controllable switch K1-Kn between every surveyed alternating current charging pile's input and output, when the effect is for being surveyed charging pile internal failure disconnection, will be surveyed charging pile's input/output short circuit, like this, remaining charging pile can continue ageing tests and not influenced.
The output end of each charging pile is provided with a sensor, the voltage or current signal output by the sensor is detected and sent to the detection and control unit, the unit detects the output voltage or current of the charging pile to be detected, and then judges whether the charging pile to be detected has a fault or not, when the fault occurs, the relay K is controlled to be closed, otherwise, the relay is switched off.
The AC feedback electronic load is an energy-saving electronic load, and the inside of the AC feedback electronic load comprises three units: an AC-DC unit, a DC-AC unit. The AC-DC unit converts input alternating current into direct current and controls the current waveform of the input alternating current, and the waveform of the input current of the AC-DC unit is different along with different load properties needing to be simulated.
The DC-DC unit converts the direct current output by the AC-DC unit through a high-frequency transformer to obtain another direct current, and then the another direct current is sent to the DC-AC unit. The unit makes the input and the output of electronic load realize electric isolation, on the one hand is more safe and reliable, on the other hand makes electronic load can the dilatation of connecting in parallel, promptly when the electronic load of needs more powerful, can connect a plurality of electronic load in parallel.
The DC-AC unit converts the direct current into alternating current and then is incorporated into commercial power. Through the alternating current electronic load, the current flows through the tested alternating current charging pile, the purpose of on-load testing is achieved, meanwhile, the energy is fed back to the power grid for cyclic utilization, and the purpose of power saving is achieved.
In a preferred embodiment, the plurality of the tested ac charging piles connected in series are also connected in series with a sensor for detecting a voltage or current signal output by the tested ac charging piles, and transmitting the signal to the voltage and current detection and relay control unit to determine whether the tested ac charging piles are in fault or not.
Further, the AC-DC unit comprises an MOS tube Q1, an MOS tube Q2, an MOS tube Q3, an MOS tube Q4, a capacitor C1 and a load simulation controller; the S level of the MOS tube Q1 is connected with the D level of the MOS tube Q3; the S stage of the MOS tube Q2 is connected with the D stage of the MOS tube Q4; two ends of the capacitor C1 are respectively connected with the D-stage of the MOS transistor Q2 and the S-stage of the MOS transistor Q4; the load simulation controller comprises a phase discriminator, a waveform generator and a current controller.
The AC-DC unit converts input alternating current into direct current and controls the waveform of load current, and the AC-DC unit is composed of a full-bridge rectifying circuit and a load simulation controller, wherein the rectifying circuit is sequentially conducted through Q1-Q4 to rectify the alternating current into the direct current DC1, a current sensor S1 detects the load current, an inductor L1 is connected to the middle points of bridge arms of a power grid and a rectifying bridge to filter the grid-connected current, and C1 is used for stably outputting direct current voltage. The load simulation controller controls the inductive current, namely the load current, by controlling the driving signals of the Q1-Q4, so that the simulation of different load characteristics is realized.
In fig. 4, from left to right, the voltage and current waveforms of the inductive load, the capacitive load, and the rectifying load are shown, vac is the voltage waveform, iac is the current waveform, and the current phase lags the voltage. According to the load type and the load parameter set value, the waveform generator obtains different current reference waveforms.
In a preferred embodiment, the DC-DC unit is a DC-to-DC converter; the direct current converter comprises an MOS tube Q1, an MOS tube Q2, an MOS tube Q3, an MOS tube Q4, a diode D1, a diode D2, a diode D3, a diode D4 and a capacitor C2; the MOS tube Q1, the MOS tube Q2, the MOS tube Q3 and the MOS tube Q4 are connected with the diode D1, the diode D2, the diode D3 and the diode D4 through a transformer T1; the transformer also comprises a capacitor C1 connected with the primary winding of the transformer T1.
Further, the DC-AC unit comprises an MOS tube Q1, an MOS tube Q2, an MOS tube Q3, an MOS tube Q4 and a follower with a power factor of 1; the S stage of the MOS tube Q1 is connected with the D stage of the MOS tube Q3; the S stage of the MOS tube Q2 is connected with the D stage of the MOS tube Q4; and two ends of the capacitor C1 are respectively connected with the D-stage of the MOS tube Q2 and the S-stage of the MOS tube Q3.
The main circuit of the DC-AC unit is similar to the AC-DC unit and is an AC-DC unit working in reverse, as shown in fig. 7, the difference from the AC-DC unit in control is that the control loop is a double loop control, the outer loop is a bus voltage loop, the inner loop is a current loop, the current loop does not need a waveform generator, but is a follower with a power factor of 1, that is, the grid-connected current completely tracks the mains voltage.
In a preferred embodiment, the sensor is a voltage sensor or a current sensor.
Further, the MOS tube Q1, the MOS tube Q2, the MOS tube Q3 and the MOS tube Q4 are N-channel MOS tubes.
In a preferred embodiment, the phase discriminator calculates the real-time phase of the AC voltage according to the input AC voltage instantaneous value, and sends the phase discriminator to the waveform generator, the input voltage signal of the phase discriminator constructs two orthogonal signals through second-order generalized integration, and the signals are converted from a stationary coordinate system to a rotating coordinate system through park conversion to obtain D and Q signals, and finally the D and Q signals are phase-locked through the voltage controlled oscillator.
Further, the waveform generator performs phase shift processing according to the type of the required analog load to obtain a current waveform reference value required to be simulated, and the waveform reference value is used as an input signal of the current controller; the input signal is calculated by the current controller to obtain driving signals of an MOS transistor Q1, an MOS transistor Q2, an MOS transistor Q3 and an MOS transistor Q4 in the main circuit, so that the actual current waveform of the AC side is controlled; the input of the current controller is an alternating current signal, and a repetitive controller is added in a control loop and used for ensuring the control effect.
In a preferred embodiment, the adjacent tested alternating current charging piles are connected with each other through a docking device; the butt joint device comprises a butt joint main machine body, a first butt joint and a second butt joint, wherein the first butt joint and the second butt joint are positioned at two ends of the butt joint main machine body; the first butt joint and the second butt joint are respectively connected with the gun heads of the two adjacent tested alternating current charging piles.
The beneficial effect of this application is as follows:
compared with the prior art, the aging test system 1 for the alternating current charging pile is characterized in that a plurality of serially connected tested alternating current charging piles connected with a mains supply, an AC-DC unit, a high-frequency isolation type DC-DC unit and a DC-AC unit which are connected with the tested alternating current charging piles connected in series relative to the other end of the mains supply are arranged at the same time, the output ends of the DC-AC units are connected to the connection parts of the mains supply and the tested alternating current charging piles, namely the input ends of the tested alternating current charging piles, and the aging test system further comprises a switch circuit which is connected with the tested alternating current charging piles connected in series, wherein the switch circuit comprises a plurality of control switches which are connected with the tested alternating current charging piles in parallel and used for realizing parallel protection and poor switching, and a voltage current detection and relay control unit used for carrying out resistive current detection and switch control.
The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. The utility model provides an alternating-current charging stake aging testing system which characterized in that: the system comprises a plurality of tested alternating current charging piles connected in series with commercial power, an AC-DC unit, a high-frequency isolation type DC-DC unit and a DC-AC unit, wherein the AC-DC unit is connected with the other ends of the tested alternating current charging piles connected in series relative to the commercial power; the output end of the DC-AC unit is connected to the connection part of the commercial power and the tested AC charging pile, namely the input end of the tested AC charging pile; the switching circuit is connected with the tested alternating current charging piles in series in parallel; the switch circuit comprises a plurality of control switches which are connected with the tested alternating current charging piles in parallel and used for realizing parallel protection and bad switching; the device also comprises a voltage and current detection and relay control unit for carrying out current detection and switch control.
2. The aging test system for the alternating-current charging pile of claim 1, wherein: the tested AC charging piles connected in series are also connected with sensors in series and used for detecting voltage or current signals output by the tested AC charging piles, transmitting the signals to the voltage and current detection and relay control unit and judging whether the tested AC charging piles are in fault or not.
3. The aging test system for the alternating-current charging pile of claim 1, wherein: the AC-DC unit comprises an MOS tube Q1, an MOS tube Q2, an MOS tube Q3, an MOS tube Q4, a capacitor C1 and a load simulation controller; the S level of the MOS tube Q1 is connected with the D level of the MOS tube Q3; the S level of the MOS tube Q2 is connected with the D level of the MOS tube Q4; two ends of the capacitor C1 are respectively connected with the D-stage of the MOS transistor Q2 and the S-stage of the MOS transistor Q4; the load simulation controller comprises a phase discriminator, a waveform generator and a current controller.
4. The aging test system for the alternating-current charging pile according to claim 1 or 2, characterized in that: the DC-DC unit is a direct current converter; the direct current converter comprises an MOS tube Q1, an MOS tube Q2, an MOS tube Q3, an MOS tube Q4, a diode D1, a diode D2, a diode D3, a diode D4 and a capacitor C2; the MOS tube Q1, the MOS tube Q2, the MOS tube Q3 and the MOS tube Q4 are connected with the diode D1, the diode D2, the diode D3 and the diode D4 through a transformer T1; the transformer also comprises a capacitor C1 connected with the primary winding of the transformer T1.
5. The aging test system for the alternating-current charging pile according to claim 1, characterized in that: the DC-AC unit comprises an MOS tube Q1, an MOS tube Q2, an MOS tube Q3, an MOS tube Q4 and a follower with a power factor of 1; the S level of the MOS tube Q1 is connected with the D level of the MOS tube Q3; the S stage of the MOS tube Q2 is connected with the D stage of the MOS tube Q4; and two ends of the capacitor C1 are respectively connected with the D-stage of the MOS transistor Q2 and the S-stage of the MOS transistor Q3.
6. The aging test system for the alternating-current charging pile of claim 2, wherein: the sensor is a voltage sensor or a current sensor.
7. The aging test system for the alternating-current charging pile of claim 4, wherein: and the MOS tube Q1, the MOS tube Q2, the MOS tube Q3 and the MOS tube Q4 are N-channel MOS tubes.
8. The aging test system for the alternating-current charging pile according to claim 3, characterized in that: the phase discriminator calculates the real-time phase of the AC voltage according to the input AC voltage instantaneous value, the real-time phase is sent to the waveform generator, the input voltage signal of the phase discriminator forms two orthogonal signals through second-order generalized integral, the two orthogonal signals are converted from a static coordinate system to a rotating coordinate system after park conversion, D and Q signals are obtained, and finally phase locking is carried out through the voltage-controlled oscillator.
9. The aging test system for the alternating-current charging pile of claim 3, wherein: the waveform generator performs phase shift processing according to the type of the required analog load to obtain a current waveform reference value required to be simulated, and the waveform reference value is used as an input signal of the current controller; the input signal is calculated by the current controller to obtain driving signals of an MOS transistor Q1, an MOS transistor Q2, an MOS transistor Q3 and an MOS transistor Q4 in the main circuit, so that the actual current waveform of the AC side is controlled; the input of the current controller is an alternating current signal, and a repetitive controller is added in a control loop and used for ensuring the control effect.
10. The aging test system for the alternating-current charging pile of claim 1, wherein: the adjacent tested AC charging piles are connected with each other through a butting device; the butt joint device comprises a butt joint main machine body, a first butt joint and a second butt joint, wherein the first butt joint and the second butt joint are positioned at two ends of the butt joint main machine body; the first butt joint and the second butt joint are respectively connected with the gun heads of the two adjacent tested alternating current charging piles.
CN202210735516.5A 2022-06-27 2022-06-27 Aging test system for alternating current charging pile Pending CN115236373A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117554687A (en) * 2024-01-10 2024-02-13 常州通宝光电股份有限公司 Alternating current mains voltage sampling circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117554687A (en) * 2024-01-10 2024-02-13 常州通宝光电股份有限公司 Alternating current mains voltage sampling circuit
CN117554687B (en) * 2024-01-10 2024-03-22 常州通宝光电股份有限公司 Alternating current mains voltage sampling circuit

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