CN201698011U - Comprehensive tester of portable direct-current system - Google Patents

Comprehensive tester of portable direct-current system Download PDF

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Publication number
CN201698011U
CN201698011U CN 201020177265 CN201020177265U CN201698011U CN 201698011 U CN201698011 U CN 201698011U CN 201020177265 CN201020177265 CN 201020177265 CN 201020177265 U CN201020177265 U CN 201020177265U CN 201698011 U CN201698011 U CN 201698011U
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China
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voltage
current
portable
electric current
testing instrument
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Expired - Fee Related
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CN 201020177265
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Chinese (zh)
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王汝钢
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Pite Tech Inc
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Pite Tech Inc
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Abstract

The utility model relates to a comprehensive tester of a portable direct-current (DC) system. The tester comprises a detecting unit, a processing unit and an analyzing unit, wherein the detecting unit is used for detecting the alternating-current (AC) voltage and current of the input side of the DC system and the DC voltage and current of the output side of the DC system; the processing unit is used for processing the detected AC voltage and current of the input side and the DC voltage and current of the output side; and the analyzing unit is used for computing the voltage-stabilizing precision, the current-stabilizing precision and the ripple wave coefficient of a charging device, the flow-equalizing unbalance, the harmonic current and the harmonic voltage of a plurality of charging modules, as well as the current, the voltage and the discharging capacity during the discharging process of a storage battery according to the processed AC voltage and current of the input side and the processed DC voltage and current of the output side. With the technical scheme, the comprehensive tester leads maintenance staffs to detect or maintain the DC system without a plurality of sets of heavy test equipment, has high intelligent degree, greatly simplifies the test process, and greatly shortens the test amount and the test time.

Description

Portable DC system integration testing instrument
Technical field
The utility model relates to Power Electronic Technique, more particularly, relates to a kind of Portable DC system integration testing instrument.
Background technology
In electricity substation, communication base station, machine room, straight-flow system is in core status, play a part very important, system such as electric power, communication all set up special O﹠M portion to straight-flow system detect, maintenance and management, and formulated special technical regulation, as DL/T724-2000 of electric system " electric system with accumulator direct current supply device operation and maintenance technical regulation " etc.In these technological documents, clear and definite regulation and technical requirement have been proposed for technical indicators such as the precision of voltage regulation, precision of steady current, ripple factor, harmonic current and the accumulator capacity of the charging device of DC power system and test.
Under the traditional approach, O﹠M portion detects straight-flow system and safeguards, needs the several people, a car carries a large amount of equipment, as discharge instrument, ampere-hour meter, overall characteristic tester, power quality analyzer, oscillograph, ripple table etc., the on-the-spot test process is very loaded down with trivial details, and the test duration is very long.In recent years, because fast development of national economy, the quantity of electricity substation, communication base station, machine room is in quick growth, and the workload of repair and maintenance department sharply increases, and adopts traditional mode to detect, safeguard and can't meet the demands.On-the-spot a kind of intelligent degree height, easy to carry, the comprehensive straight-flow system measuring instrument be badly in need of satisfies under the situation of code requirement in assurance, realizes the quick test to DC power system.
The utility model content
The technical problems to be solved in the utility model is, at the above-mentioned of prior art straight-flow system is detected and the used defective that equipment is many, process is loaded down with trivial details, the test duration is grown when safeguarding, the tester of a kind of intelligent degree height, straight-flow system easy to carry is provided.
The technical scheme that its technical matters that solves the utility model adopts is: construct a kind of Portable DC system integration testing instrument, described straight-flow system comprises charging device and battery pack, described charging device comprises the charging module that several are in parallel, and this tester comprises:
Be used to detect the input side alternating voltage of described straight-flow system and the detecting unit of electric current, outgoing side DC voltage and electric current;
Be used for processing unit that the input side alternating voltage that detected and electric current, outgoing side DC voltage and electric current are handled;
Be used for the precision of voltage regulation, precision of steady current, ripple factor, the current-sharing degree of unbalancedness of some charging modules, harmonic current, harmonic voltage according to the input side alternating voltage after handling and electric current, outgoing side DC voltage and electric current calculating charging device, and the analytic unit of electric current, voltage and discharge capacity in the battery pack discharge process.
In Portable DC system integration testing instrument described in the utility model, state detecting unit and comprise split core type current transformer and voltage tester wire clamp.
In Portable DC system integration testing instrument described in the utility model, described processing unit comprises filtering subelement, amplification subelement, the analog to digital conversion subelement that connects successively.
In Portable DC system integration testing instrument described in the utility model, described filtering subelement comprises electric current low-pass filter, voltage low-pass filter and voltage Hi-pass filter.
In Portable DC system integration testing instrument described in the utility model, described tester also comprises the input block that is used to be provided with or revise test parameter.
In Portable DC system integration testing instrument described in the utility model, described tester also comprises the precision of voltage regulation, precision of steady current, ripple factor, the current-sharing degree of unbalancedness of some charging modules, harmonic current, the harmonic voltage that is used to export the charging device that is calculated, and the output unit of electric current, voltage and discharge capacity in the battery pack discharge process.
In Portable DC system integration testing instrument described in the utility model, described output unit is display screen and/or printer.
In Portable DC system integration testing instrument described in the utility model, described tester also comprises the storage unit of electric current, voltage and discharge capacity data of current-sharing degree of unbalancedness, harmonic current, harmonic voltage and the battery pack discharge process of the precision of voltage regulation that is used for storing the charging device that described analytic unit calculates, precision of steady current, ripple factor, some charging modules.
In Portable DC system integration testing instrument described in the utility model, described tester also comprises and is used to realize the communication unit that communicates with computing machine.
In Portable DC system integration testing instrument described in the utility model, described communication unit is at least a among RS232/485, LAN, the USB.
Implement Portable DC system integration testing instrument of the present utility model, can calculate the parameter of electric current, voltage and discharge capacity in current-sharing degree of unbalancedness, harmonic current, harmonic voltage and the battery pack discharge process of the precision of voltage regulation, precision of steady current, the ripple factor of charging device, some charging modules, make the maintainer to DC power system detect or when safeguarding, do not need the heavy testing apparatus of many covers, and this tester is easy to carry.In addition, the intelligent degree height of this tester has been simplified test process greatly, and the workload of test and test duration are shortened dramatically.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the logical diagram of the utility model Portable DC system integration testing instrument embodiment one;
Fig. 2 is the logical diagram of the utility model Portable DC system integration testing instrument embodiment two;
Fig. 3 is the logical diagram of the analytic unit embodiment one in the utility model Portable DC system integration testing instrument;
Fig. 4 adopts Portable DC system integration testing instrument of the present utility model straight-flow system to be carried out the logical diagram of test implementation example one;
Fig. 5 adopts Portable DC system integration testing instrument of the present utility model straight-flow system to be carried out the logical diagram of test implementation example two;
Fig. 6 adopts Portable DC system integration testing instrument of the present utility model straight-flow system to be carried out the logical diagram of test implementation example three.
Embodiment
As shown in Figure 1, in the logical diagram of the utility model Portable DC system integration testing instrument embodiment one, should be noted that at first this straight-flow system comprises charging device and battery pack, described charging device comprises the charging module that several are in parallel.This tester comprises detecting unit 100, processing unit 200 and the analytic unit 300 that connects successively, and wherein, detecting unit 100 is used to detect input side alternating voltage and electric current, outgoing side DC voltage and the electric current of straight-flow system; Processing unit 200 is used for the input side alternating voltage that is detected and electric current, outgoing side DC voltage and electric current are handled; Analytic unit 300 is used for the precision of voltage regulation, precision of steady current, ripple factor, the current-sharing degree of unbalancedness of some charging modules, harmonic current, the harmonic voltage according to the input side alternating voltage after handling and electric current, outgoing side DC voltage and electric current calculating charging device, and electric current, voltage and discharge capacity in the battery pack discharge process.
Preferably, detecting unit 100 comprises voltage tester wire clamp and split core type current transformer, is respectively applied for test input side alternating voltage, outgoing side DC voltage and input side alternating current, outgoing side DC current.
Preferably, processing unit 200 comprises filtering subelement, amplification subelement, the analog to digital conversion subelement that connects successively, wherein, the filtering subelement comprises electric current low-pass filter, voltage low-pass filter and voltage Hi-pass filter, the upper cut-off frequency of electric current low-pass filter is 100kHz, the upper cut-off frequency of voltage low-pass filter is 5kHz, and voltage Hi-pass filter lower-cut-off frequency is 5kHz.The optional frequency of analog to digital conversion subelement is the 12 bit parallel AD converter THS1206 of 6MHz.
In the logical diagram of the utility model Portable DC system integration testing instrument embodiment two shown in Fig. 2, this tester comprises detecting unit 100, processing unit 200, analytic unit 300, input block 400, output unit 500, storage unit 600 and communication unit 700, wherein, detecting unit 100 among this embodiment, the detecting unit 100 of processing unit 200 and analytic unit 300 and embodiment one, processing unit 200 is identical with analytic unit 300, do not do at this and to give unnecessary details, below input block 400 only is described, output unit 500, storage unit 600 and communication unit 700.Input block 400 is connected with analytic unit 300, is used for being provided with or revising test parameter, and preferably, input block 400 can be button; Output unit 500 is connected with analytic unit 300, be used for exporting electric current, voltage and the discharge capacity of current-sharing degree of unbalancedness, harmonic current, harmonic voltage and the battery pack discharge process of the precision of voltage regulation, precision of steady current, the ripple factor of the charging device that analytic unit 300 calculated, some charging modules, preferably, output unit 500 can be display screen and/or printer.In addition, input block 400 and output unit 500 also can be integrated into touch-screen; Storage unit 600 is connected with analytic unit 300, the data such as electric current, voltage and discharge capacity that are used for current-sharing degree of unbalancedness, harmonic current, harmonic voltage and the battery pack discharge process of the precision of voltage regulation, precision of steady current, the ripple factor of the charging device that calculates inventory analysis unit 300, some charging modules, preferably, storage unit 600 can be SRAM, FLASH, EEPROM; Communication unit 700 is connected with analytic unit 300, is used for realizing communicating with computing machine, and then realizes that exchanges data and device program upgrade, and preferably, communication unit 700 is at least a among RS232/485, LAN, the USB.
Analytic unit 300 is as the core of tester, preferably, in the analytic unit 300 of the tester shown in Fig. 3, analytic unit 300 is by host CPU 330, form from CPU 310 and dual port RAM 320, wherein, adopt TI Company DSP chip TMS302C5402 from CPU 310, finish the tasks such as computing, analysis, processing of digital signal, it is connected with processing unit 200; It is the microcontroller LPC2478 of kernel that host CPU 330 can adopt the ARM7TDMI-S of NXP semiconductor company (NXP Semiconductors is by the independent semiconductor company of Philip establishment), finishes tasks such as control, storage, demonstration, communication; Host CPU 330, link to each other with dual port RAM 320 respectively from CPU 310, by dual port RAM 320 swap datas; After sending host CPU 330 from the result of calculation of CPU310 to by dual port RAM 320, host CPU sends data to output unit 500, storage unit 600, communication unit 700 etc. more respectively.
How below specify tester finishes straight-flow system is tested:
1. discharge test
Fig. 4 adopts Portable DC system integration testing instrument of the present utility model straight-flow system to be carried out the logical diagram of test implementation example one, as shown in Figure 4, this straight-flow system comprises charging device 1 and battery pack, charging device comprises the charging module 11,12,13,14,15 of 5 parallel connections, but the utility model does not limit to 5 charging modules.When tester used as ampere-hour meter, this tester was tested the discharge process of battery pack.When test, detect the voltage of battery pack with the voltage tester folder of tester, detect the electric current of battery pack with the split core type current transformer of tester, the voltage signal that is detected is sent into the amplification subelement and is amplified behind voltage low pass filter filters out high-frequency interferencing signal, voltage signal after AD converter will be amplified again is converted to digital signal and sends into analytic unit 300, similarly, the current signal that is detected is sent into the amplification subelement and is amplified behind electric current low pass filter filters out high-frequency interferencing signal, current signal after AD converter will be amplified again is converted to digital signal and sends into analytic unit 300, and analytic unit calculates discharge capacity according to following formula:
C=∫ 0 T?i(t)dt
Wherein, i (t) is the electric current that is detected.
Then the battery pack electric current that tester detected in discharge process, voltage and discharge capacity are printed by the display screen demonstration or by printer, so just can clearly write down battery pack electric current, voltage, the time dependent trend map of discharge capacity difference in discharge process, after the end of test (EOT), also test result can be stored to storage unit 600.
2. ripple test
When the use test instrument carries out ripple test to straight-flow system, as shown in Figure 4, detect the output voltage of charging device with the voltage tester folder of tester, split core type current transformer need not to detect electric current among Fig. 4, the voltage signal that is detected is sent into the amplification subelement and is amplified behind voltage Hi-pass filter filtering low-frequency interference signal, voltage signal after AD converter will be amplified again is converted to digital signal and sends into analytic unit 300, and analytic unit 300 carries out following calculating:
Ripple voltage=U Pp/ 2,
Ripple factor δ Pp=U Pp/ 2U Dc* 100%
Wherein, U PpBe ripple voltage peak-to-peak value, U DcBe the average value of output voltage that is detected.
In test process, can be by DC voltage, the ripple voltage that is calculated, the ripple factor that output unit shows or printing is detected.After end of test (EOT), also test result can be stored to storage unit 600.
3. overall characteristic test
When the use test instrument carries out the overall characteristic test to straight-flow system, as shown in Figure 4, detect the output voltage of charging device with the voltage tester folder of tester, detect the output current of charging device with the split core type current transformer of tester, the current signal that is detected is sent into the amplification subelement and is amplified behind electric current low pass filter filters out high-frequency interferencing signal, current signal after AD converter will be amplified again is converted to digital signal and sends into analytic unit 300, and analytic unit 300 calculates the precision of steady current of charging device by following formula:
δ I=(I M-Iz)/Iz×100%
Wherein, I MBe the surge limit value of the output current that detected, Iz is the setting valve of the output current that detected.
The voltage signal that is detected is divided into two-way, one the tunnel sends into the amplification subelement behind voltage low pass filter filters out high-frequency interferencing signal amplifies, voltage signal after AD converter will be amplified again is converted to digital signal and sends into analytic unit 300, and analytic unit 300 calculates the precision of voltage regulation of charging device by following formula:
δ U=(U M-Uz)/Uz×100%
Wherein, U MBe the surge limit value of the output voltage that detected, Uz is the setting valve of the output voltage that detected.
Another road in the voltage signal that is detected is sent into the amplification subelement and is amplified behind voltage Hi-pass filter filtering low-frequency interference signal, voltage signal after AD converter will be amplified again is converted to digital signal and sends into analytic unit 300, and analytic unit 300 carries out following calculating:
Ripple voltage=U Pp/ 2,
Ripple factor δ Pp=U Pp/ U Dc* 100%
Wherein, U PpBe ripple voltage peak-to-peak value, U DcBe the average value of output voltage that is detected.
In test process, can be by DC voltage, DC current, the precision of voltage regulation of being calculated, precision of steady current, ripple voltage, the ripple factor that output unit shows or printing is detected.After end of test (EOT), also test result can be stored to storage unit 600.
4. equal current test
Fig. 5 adopts Portable DC system integration testing instrument of the present utility model that straight-flow system is carried out the logical diagram of test implementation example two, and straight-flow system shown in Figure 5 is identical with the logical organization of straight-flow system shown in Figure 4, does not do at this and gives unnecessary details.When the use test instrument carries out the equal current test of charging module, detect the output current of each charging module respectively with the split core type current transformer of tester, the output current of example detection charging module 11 as shown in Figure 5, then the output current of every charging module being detected is sent into behind electric current low pass filter filters out high-frequency interferencing signal respectively and amplified subelement and amplify, current signal after AD converter will be amplified again is converted to digital signal and sends into analytic unit 300, and analytic unit 300 calculates the current-sharing degree of unbalancedness of charging module by following formula:
δ i=(I m-I z)/I e×100%
Wherein, I mBe each charging module output current fluctuation maximal value; I zBe each charging module output current mean value; Ie is each module output-current rating value.
In test process, can be by the current-sharing degree of unbalancedness that output unit shows or printing is calculated.After end of test (EOT), also test result can be stored to storage unit 600.
5. harmonic wave test
Fig. 6 adopts Portable DC system integration testing instrument of the present utility model that straight-flow system is carried out the logical diagram of test implementation example three, and straight-flow system shown in Figure 6 is identical with the logical organization of straight-flow system shown in Figure 4, does not do at this and gives unnecessary details.As shown in Figure 6, when the use test instrument carries out the harmonic wave test, detect the input voltage of charging device with the voltage tester folder of tester, detect the input current of charging device with the split core type current transformer of tester, the voltage signal that is detected is sent into the amplification subelement and is amplified behind voltage low pass filter filters out high-frequency interferencing signal, voltage signal after AD converter will be amplified again is converted to digital signal and sends into analytic unit 300, similarly, the current signal that is detected is sent into the amplification subelement and is amplified behind electric current low pass filter filters out high-frequency interferencing signal, current signal after AD converter will be amplified again is converted to digital signal and sends into analytic unit 300, analytic unit 300 carries out Fourier transform to voltage signal processed and current signal respectively, calculate the real effective of first-harmonic and 2-50 subharmonic, relative harmonic content, parameters such as resultant distortion rate, and test data exported and stored record.
5. digital oscilloscope
When using as digital oscilloscope, the voltage tester folder and the split core type current transformer of described tester detect voltage or current signal, sending into amplifier behind the current signal process low pass filter filters out high-frequency interferencing signal that is detected amplifies, send into again and send into analytic unit 300 after AD converter becomes digital signal, show and store record by signal after 300 pairs of processing of analytic unit; When need test low-frequency voltage signal, the voltage signal that is detected is sent into the amplification subelement and is amplified behind the low pass filter filters out high-frequency interferencing signal, send into again and send into analytic unit 300 after AD converter becomes digital signal, show and stored record by signal after 300 pairs of processing of analytic unit; When need test high-frequency voltage signal, the voltage signal that is detected is sent into the amplification subelement and is amplified behind Hi-pass filter filtering low frequency signal, send into again and send into analytic unit 300 after AD converter becomes digital signal, show and stored record by the signal after 300 pairs of processing of analytic unit.
The above is a preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.

Claims (10)

1. Portable DC system integration testing instrument, described straight-flow system comprises charging device and battery pack, and described charging device comprises the charging module that several are in parallel, it is characterized in that, and this tester comprises:
Be used to detect the input side alternating voltage of described straight-flow system and the detecting unit of electric current, outgoing side DC voltage and electric current;
Be used for processing unit that the input side alternating voltage that detected and electric current, outgoing side DC voltage and electric current are handled;
Be used for the precision of voltage regulation, precision of steady current, ripple factor, the current-sharing degree of unbalancedness of some charging modules, harmonic current, harmonic voltage according to the input side alternating voltage after handling and electric current, outgoing side DC voltage and electric current calculating charging device, and the analytic unit of electric current, voltage and discharge capacity in the battery pack discharge process.
2. Portable DC system integration testing instrument according to claim 1 is characterized in that described detecting unit comprises split core type current transformer and voltage tester wire clamp.
3. Portable DC system integration testing instrument according to claim 1 is characterized in that, described processing unit comprises filtering subelement, amplification subelement, the analog to digital conversion subelement that connects successively.
4. Portable DC system integration testing instrument according to claim 1 is characterized in that described filtering subelement comprises electric current low-pass filter, voltage low-pass filter and voltage Hi-pass filter.
5. Portable DC system integration testing instrument according to claim 1 is characterized in that described tester also comprises the input block that is used to be provided with or revise test parameter.
6. Portable DC system integration testing instrument according to claim 1, it is characterized in that, described tester also comprises the precision of voltage regulation, precision of steady current, ripple factor, the current-sharing degree of unbalancedness of some charging modules, harmonic current, the harmonic voltage that is used to export the charging device that is calculated, and the output unit of electric current, voltage and discharge capacity in the battery pack discharge process.
7. Portable DC system integration testing instrument according to claim 6 is characterized in that described output unit is display screen and/or printer.
8. Portable DC system integration testing instrument according to claim 1, it is characterized in that described tester also comprises the storage unit of electric current, voltage and discharge capacity data of current-sharing degree of unbalancedness, harmonic current, harmonic voltage and the battery pack discharge process of the precision of voltage regulation that is used for storing the charging device that described analytic unit calculates, precision of steady current, ripple factor, some charging modules.
9. Portable DC system integration testing instrument according to claim 1 is characterized in that, described tester also comprises and is used to realize the communication unit that communicates with computing machine.
10. Portable DC system integration testing instrument according to claim 9 is characterized in that, described communication unit is at least a among RS232/485, LAN, the USB.
CN 201020177265 2010-04-30 2010-04-30 Comprehensive tester of portable direct-current system Expired - Fee Related CN201698011U (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103308866A (en) * 2013-06-04 2013-09-18 安徽省电力公司阜阳供电公司 Direct current insulation on-line monitoring device of transformer substation
CN103941197A (en) * 2014-04-17 2014-07-23 苏州市华东电网电气有限公司 Monitoring device and method for direct-current power source complete equipment ripple factor
CN104068664A (en) * 2013-03-28 2014-10-01 国家电网公司 Maintenance ladder
CN106443479A (en) * 2016-10-26 2017-02-22 深圳供电局有限公司 A storage battery intelligent monitoring system
CN107782942A (en) * 2016-08-31 2018-03-09 北京普源精电科技有限公司 Oscilloscope measurement circuit and its Active Front End, test system, measuring method
CN113093045A (en) * 2021-04-06 2021-07-09 广东电网有限责任公司 Power quality monitoring device, system and method for alternating current-direct current conversion power supply
CN113614551A (en) * 2019-03-29 2021-11-05 戴姆勒股份公司 Method and device for determining the cell voltage of a battery cell of a power battery of a vehicle

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104068664A (en) * 2013-03-28 2014-10-01 国家电网公司 Maintenance ladder
CN103308866A (en) * 2013-06-04 2013-09-18 安徽省电力公司阜阳供电公司 Direct current insulation on-line monitoring device of transformer substation
CN103941197A (en) * 2014-04-17 2014-07-23 苏州市华东电网电气有限公司 Monitoring device and method for direct-current power source complete equipment ripple factor
CN107782942A (en) * 2016-08-31 2018-03-09 北京普源精电科技有限公司 Oscilloscope measurement circuit and its Active Front End, test system, measuring method
CN107782942B (en) * 2016-08-31 2021-03-02 北京普源精电科技有限公司 Oscilloscope measuring circuit, active front end thereof, testing system and measuring method
CN106443479A (en) * 2016-10-26 2017-02-22 深圳供电局有限公司 A storage battery intelligent monitoring system
CN113614551A (en) * 2019-03-29 2021-11-05 戴姆勒股份公司 Method and device for determining the cell voltage of a battery cell of a power battery of a vehicle
CN113093045A (en) * 2021-04-06 2021-07-09 广东电网有限责任公司 Power quality monitoring device, system and method for alternating current-direct current conversion power supply

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