CN109521276A - A kind of high-voltage large-capacity impedance measurement device and its disturbance control method - Google Patents
A kind of high-voltage large-capacity impedance measurement device and its disturbance control method Download PDFInfo
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- CN109521276A CN109521276A CN201811219289.0A CN201811219289A CN109521276A CN 109521276 A CN109521276 A CN 109521276A CN 201811219289 A CN201811219289 A CN 201811219289A CN 109521276 A CN109521276 A CN 109521276A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
Abstract
The invention discloses a kind of high-voltage large-capacity impedance measurement device and its disturbance control methods, the input that high-voltage large-capacity broadband voltage disturbs injection device uses Multiple coil phase-shifting transformer, and each winding of phase-shifting transformer secondary side connects an AC/DC/AC power modules and carries out the uncontrollable rectification of three-phase；AC/DC/AC power modules are made of the uncontrollable rectification of three-phase, DC bus capacitor and single-phase H bridge；The output of device uses multiple cascade modes of AC/DC/AC power modules；The output of device flanks LC output filter, and is linked into the 35kV side line road of generation of electricity by new energy equipment to be measured by the series connection of 10kV/35kV coupling transformer, provides voltage disturbance source.High-voltage large-capacity broadband voltage disturbs the output of injection device using the opened loop control for considering DC voltage fluctuation, and the conducting and shutdown of each single-phase H bridge power device are then controlled by unipolarity frequency multiplication phase-shifted SPWM Multilevel modulation.The present invention can meet the needs of broadband output impedance on-line measurement under the high-voltage large-capacities scene such as wind-power electricity generation.
Description
Technical field
The present invention relates to the impedance line Measurement Technique field in generation of electricity by new energy, especially a kind of high pressure, large capacity
Wide-band impedance measurement equipment and control method.
Background technique
The year two thousand twenty China wind, light capacity of installed generator are up to 3.2 hundred million kilowatts, wherein 200,000,000 kilowatts positioned at " three Norths "
Area.It is built, have 8 with planning construction extra-high voltage direct-current Transmission Corridor building to solve the problems, such as " three Norths " regional new energy consumption
Item, big base, direct current send out at present and in the future that a period of time will be leading form that China's new energy development utilizes.New energy
In the base direct current delivery system that generates electricity, power electronics power generating equipment enormous amount, control is complicated and there are Multiple Time Scales couplings
It closes, the dynamic interaction between base and its with direct current transportation aggravates, and system oscillation is in broadband, time-varying and polymorphic feature.
Impedance method in frequency domain theory is one of analysis most common method of new energy current transformer grid-connected system oscillation problem, basic
Thinking is that current transformer and AC network are regarded as to two independent subsystems, and the external characteristics of subsystem is described using impedance matrix,
And system stability is judged using the impedance ratio of subsystem.Compared with the Eigenvalues analysis method based on state-space model, resistance
Detailed model and design parameter of the anti-method independent of system, needed for impedance matrix can pass through measurement real system
Port external characteristics obtains, and the method that can be polymerize by impedance copes with the expansion of system scale, especially suitable for a large amount of
The analysis of the large scale system of isomery new energy unit composition, therefore be widely applied.Research and develop generation of electricity by new energy equipment
Wide-band impedance feature measurement technology and equipment are basis and the key of impedance method application, are to solve generation of electricity by new energy to equip
The effective means for the problem of impedance operator is difficult to precise measurement, existing emulation tool can not adapt to new energy unit enormous amount.
Therefore, carry out the research of wide-band impedance feature measurement technology and equipment to announcement generation of electricity by new energy base direct current delivery system
Broadband Oscillating Mechanism and propose oscillation defence and suppressing method have great meaning.Then, impedance measurement at present is equipped
Research be concentrated mainly on low pressure low capacity field, 35kV, MW class impedance measurement equipment is rarely reported, but current mainstream
The capacity of blower is all in MW class.Therefore, the present invention proposes that controlling party is equipped and its disturbed in a kind of high-voltage large-capacity impedance measurement
Method can meet the needs of broadband output impedance on-line measurement under the high-voltage large-capacities scene such as wind-power electricity generation.
Summary of the invention
The technical problem to be solved by the present invention is in view of the shortcomings of the prior art, provide a kind of high-voltage large-capacity impedance survey
Device and its disturbance control method are measured, broadband output impedance on-line measurement under the high-voltage large-capacities scene such as wind-power electricity generation is met
Demand.
In order to solve the above technical problems, the technical scheme adopted by the invention is that: a kind of high-voltage large-capacity impedance measurement dress
It sets, including high-voltage large-capacity broadband voltage disturbs injection device；The high-voltage large-capacity broadband voltage disturbs injection device
Input use Multiple coil phase-shifting transformer, each winding of the Multiple coil phase-shifting transformer secondary side respectively meets an AC/
DC/AC power modules carry out the uncontrollable rectification of three-phase；AC/DC/AC power modules include that sequentially connected three-phase is uncontrollable
Rectification, DC bus capacitor and single-phase H bridge；The output of the high-voltage large-capacity broadband voltage disturbance injection device is using multiple
The cascade mode of AC/DC/AC power modules；The output of the high-voltage large-capacity broadband voltage disturbance injection device flanks
LC output filter, and the 35kV side line that generation of electricity by new energy to be measured is equipped is linked by the series connection of 10kV/35kV coupling transformer
Lu Zhong.
Correspondingly, the present invention also provides a kind of disturbance control method of high-voltage large-capacity impedance measurement device, high pressure is big
Capacity broadband voltage disturbs the output of injection device using the opened loop control for considering DC voltage fluctuation, then passes through list
Polarity frequency multiplication phase-shifted SPWM Multilevel modulation controls each single-phase H in high-voltage large-capacity broadband voltage disturbance injection device
The conducting and shutdown of bridge power device.Method includes the following steps:
1) control unit receives N number of AC/DC/AC power of A phase in high-voltage large-capacity broadband voltage disturbance injection device
The DC voltage information v of moduledca1、vdca2、…、vdcaN, the DC voltage letter of the N number of AC/DC/AC power modules of B phase
Cease vdcb1、 vdcb2、…、vdcbNWith the DC voltage information v of the N number of AC/DC/AC power modules of C phasedcc1、vdcc2、…、
vdccN, N is the quantity of each phase AC/DC/AC power modules；
2) by vdca1、vdca2、…、vdcaNSummation, obtain the N number of AC/DC/AC power modules of A phase DC voltage it
And vdca, by vdcb1、vdcb2、…、vdcbNSummation, obtains the sum of the DC voltage of the N number of AC/DC/AC power modules of B phase
vdcb, by vdcc1、vdcc2、…、vdccNSummation, obtains the sum of the DC voltage of the N number of AC/DC/AC power modules of C phase vdcc；
3) A phase is disturbed into voltage magnitude instruction VrefaDivided by vdcaObtain the amplitude M of A phase modulation waveforma, B phase is disturbed into electricity
Pressure amplitude value instructs VrefbDivided by vdcbObtain the amplitude M of B phase modulation waveformb, C phase is disturbed into voltage magnitude instruction VrefcDivided by vdcc
Obtain the amplitude M of C phase modulation waveformc；
4) according to frequency instruction ω, A phase first phase bit instructionB phase first phase bit instructionC phase first phase bit instructionAnd
Ma、MbAnd Mc, the modulating wave for obtaining A, B, C three-phase is respectivelyt
For the time；
5) willIt is more through unipolarity frequency multiplication phase-shifted SPWM
Level modulation obtains the control signal S of each AC/DC/AC power modules of A phasea1、Sa2、…、SaN, each AC/DC/AC power of B phase
The control signal S of submoduleb1、Sb2、…、SbNAnd the control signal S of each AC/DC/AC power modules of C phasec1、Sc2、…、
ScN, to control the power device conducting and shutdown of each single-phase H bridge.
Compared with prior art, the advantageous effect of present invention is that: the present invention provides one kind high pressure, megawatt
Grade, the measurement equipment of wide-band impedance characteristic and method are conducive to provide power generating equipment impedance in generation of electricity by new energy base and model
Required impedance measured data.
Detailed description of the invention
Fig. 1 is the system construction drawing of one embodiment of the invention high-voltage large-capacity impedance measurement device；
Fig. 2 is 35kV/3MV broadband voltage disturbance note in one embodiment of the invention high-voltage large-capacity impedance measurement device
Enter the control block diagram of device.
Specific embodiment
As shown in Figure 1, a kind of high-voltage large-capacity impedance measurement device includes the disturbance injection of 35kV/3MVA broadband voltage
Device, signal processing unit, wide-band impedance calculate and monitoring unit, control unit.Wherein 35kV/3MV broadband voltage is disturbed
The input of dynamic injection device uses Multiple coil phase-shifting transformer, and each winding of phase-shifting transformer secondary side meets an AC/
DC/AC power modules carry out the uncontrollable rectification of three-phase；AC/DC/AC power modules are by the uncontrollable rectification of three-phase, DC side
Capacitor and single-phase H bridge composition；The output of device uses multiple cascade modes of AC/DC/AC power modules；The output of device
LC output filter is flanked, and is linked into the 35kV of generation of electricity by new energy equipment to be measured by the series connection of 10kV/35kV coupling transformer
In side line road.35kV/3MVA broadband voltage disturbs injection device and provides the voltage disturbance source of surveyed impedance frequency；At signal
The voltage and current signal of reason unit acquisition Devices to test interface simultaneously the processing such as are filtered；Wide-band impedance calculates and prison
Unit is controlled to carry out impedance computation, send disturbance voltage instruction and carry out human-computer interaction；Control unit is used for 35kV/3MV broadband
The control of voltage disturbance injection device.
As shown in Fig. 2, the output of 35kV/3MV broadband voltage disturbance injection device is using consideration DC voltage fluctuation
Opened loop control, then by unipolarity frequency multiplication phase-shifted SPWM Multilevel modulation control 35kV/3MV broadband voltage disturb
The conducting and shutdown of each single-phase H bridge power device in dynamic injection device.Method includes the following steps:
1) control unit receives N number of AC/DC/AC power of A phase in 35kV/3MVA broadband voltage disturbance injection device
The DC voltage information v of moduledca1、vdca2、…、vdcaN, the DC voltage letter of N AC/DC/AC power modules of B phase
Cease vdcb1、vdcb2、…、vdcbNWith the DC voltage information v of the N number of AC/DC/AC power modules of C phasedcc1、vdcc2、…、
vdccN, N is the quantity of each phase AC/DC/AC power modules, N desirable 9；
2) by vdca1、vdca2、…、vdcaNSummation, obtain the N number of AC/DC/AC power modules of A phase DC voltage it
And vdca, by vdcb1、vdcb2、…、vdcbNSummation, obtains the sum of the DC voltage of the N number of AC/DC/AC power modules of B phase
vdcb, by vdcc1、vdcc2、…、vdccNSummation, obtains the sum of the DC voltage of the N number of AC/DC/AC power modules of C phase vdcc；
3) A phase is disturbed into voltage magnitude instruction VrefaDivided by vdcaObtain the amplitude M of A phase modulation waveforma, B phase is disturbed into electricity
Pressure amplitude value instructs VrefbDivided by vdcbObtain the amplitude M of B phase modulation waveformb, C phase is disturbed into voltage magnitude instruction VrefcDivided by vdcc
Obtain the amplitude M of C phase modulation waveformc；
4) according to frequency instruction ω, A phase first phase bit instructionB phase first phase bit instructionC phase first phase bit instructionAnd
Ma、MbAnd McThe modulating wave that A, B, C three-phase can be obtained is respectively When t is
Between；
5) willIt is more through unipolarity frequency multiplication phase-shifted SPWM
Level modulation obtains the control signal S of each AC/DC/AC power modules of A phasea1、 Sa2、…、SaN, each AC/DC/AC power of B phase
The control signal S of submoduleb1、Sb2、…、 SbNAnd the control signal S of each AC/DC/AC power modules of C phasec1、Sc2、…、
ScN, to control the power device conducting and shutdown of each single-phase H bridge.
Claims (2)
1. a kind of high-voltage large-capacity impedance measurement device, which is characterized in that disturb and inject including high-voltage large-capacity broadband voltage
Device；The input of high-voltage large-capacity broadband voltage disturbance injection device uses Multiple coil phase-shifting transformer, it is described mostly around
Each winding of group phase-shifting transformer secondary side respectively connects an AC/DC/AC power modules and carries out the uncontrollable rectification of three-phase；AC/
DC/AC power modules include the uncontrollable rectification of sequentially connected three-phase, DC bus capacitor and single-phase H bridge；The high pressure great Rong
The output for measuring broadband voltage disturbance injection device uses multiple cascade modes of AC/DC/AC power modules；The high pressure is big
The output of capacity broadband voltage disturbance injection device flanks LC output filter, and passes through 10kV/35kV coupling transformer string
Connection is linked into the 35kV side line road of generation of electricity by new energy equipment to be measured.
2. a kind of disturbance control method of high-voltage large-capacity impedance measurement device, which is characterized in that method the following steps are included:
1) control unit receives the N number of AC/DC/AC power modules of A phase in high-voltage large-capacity broadband voltage disturbance injection device
DC voltage information vdca1、vdca2、…、vdcaN, the DC voltage information of the N number of AC/DC/AC power modules of B phase
vdcb1、vdcb2、…、vdcbNWith the DC voltage information v of the N number of AC/DC/AC power modules of C phasedcc1、vdcc2、…、vdccN, N
For the quantity of each phase AC/DC/AC power modules；
2) by vdca1、vdca2、…、vdcaNSummation, obtains the sum of the DC voltage of the N number of AC/DC/AC power modules of A phase vdca,
By vdcb1、vdcb2、…、vdcbNSummation, obtains the sum of the DC voltage of the N number of AC/DC/AC power modules of B phase vdcb, will
vdcc1、vdcc2、…、vdccNSummation, obtains the sum of the DC voltage of the N number of AC/DC/AC power modules of C phase vdcc；
3) A phase is disturbed into voltage magnitude instruction VrefaDivided by vdcaObtain the amplitude M of A phase modulation waveforma, B phase is disturbed into voltage amplitude
Value instruction VrefbDivided by vdcbObtain the amplitude M of B phase modulation waveformb, C phase is disturbed into voltage magnitude instruction VrefcDivided by vdccObtain C
The amplitude M of phase modulation waveformc；
4) according to frequency instruction ω, A phase first phase bit instructionB phase first phase bit instructionC phase first phase bit instructionAnd Ma、MbWith
Mc, the modulating wave for obtaining A, B, C three-phase is respectivelyT is the time；
5) willThrough the more level tune of unipolarity frequency multiplication phase-shifted SPWM
System, obtains the control signal S of each AC/DC/AC power modules of A phasea1、Sa2、…、SaN, each AC/DC/AC power modules of B phase
Control signal Sb1、Sb2、…、SbNAnd the control signal S of each AC/DC/AC power modules of C phasec1、Sc2、…、ScN, thus
Control the power device conducting and shutdown of each single-phase H bridge.
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| CN201811219289.0A CN109521276A (en) | 2018-10-19 | 2018-10-19 | A kind of high-voltage large-capacity impedance measurement device and its disturbance control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023143228A1 (en) * | 2022-01-29 | 2023-08-03 | 华为数字能源技术有限公司 | Equivalent impedance measurement method and apparatus for photovoltaic assembly |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011223784A (en) * | 2010-04-13 | 2011-11-04 | Hitachi Ltd | Power conversion apparatus |
| CN102522906A (en) * | 2011-12-22 | 2012-06-27 | 东南大学 | Voltage balance and power balance control method of cascaded H bridge converter |
| CN103647278A (en) * | 2013-12-18 | 2014-03-19 | 国家电网公司 | High-capacity unified power disturbance generating device |
| CN107315112A (en) * | 2017-07-05 | 2017-11-03 | 湖南大学 | A kind of MW class wide-band impedance measurement apparatus and its control method |
| CN108303590A (en) * | 2018-01-31 | 2018-07-20 | 湖南大学 | MW class wide-band impedance measuring device based on MMC and its control method |
-
2018
- 2018-10-19 CN CN201811219289.0A patent/CN109521276A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011223784A (en) * | 2010-04-13 | 2011-11-04 | Hitachi Ltd | Power conversion apparatus |
| CN102522906A (en) * | 2011-12-22 | 2012-06-27 | 东南大学 | Voltage balance and power balance control method of cascaded H bridge converter |
| CN103647278A (en) * | 2013-12-18 | 2014-03-19 | 国家电网公司 | High-capacity unified power disturbance generating device |
| CN107315112A (en) * | 2017-07-05 | 2017-11-03 | 湖南大学 | A kind of MW class wide-band impedance measurement apparatus and its control method |
| CN108303590A (en) * | 2018-01-31 | 2018-07-20 | 湖南大学 | MW class wide-band impedance measuring device based on MMC and its control method |
Non-Patent Citations (2)
| Title |
|---|
| 伍文华等: "《兆瓦级宽频带阻抗测量装置设计及其控制方法》", 《中国电机工程学报》 * |
| 侯世英等: "《用于级联型多电平变换器的新型脉宽调制方法》", 《电网技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023143228A1 (en) * | 2022-01-29 | 2023-08-03 | 华为数字能源技术有限公司 | Equivalent impedance measurement method and apparatus for photovoltaic assembly |
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Application publication date: 20190326 |
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