WO2022270470A1 - 高調波抑制装置 - Google Patents
高調波抑制装置 Download PDFInfo
- Publication number
- WO2022270470A1 WO2022270470A1 PCT/JP2022/024555 JP2022024555W WO2022270470A1 WO 2022270470 A1 WO2022270470 A1 WO 2022270470A1 JP 2022024555 W JP2022024555 W JP 2022024555W WO 2022270470 A1 WO2022270470 A1 WO 2022270470A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- target value
- compensation
- suppression device
- power converter
- voltage
- Prior art date
Links
- 230000001629 suppression Effects 0.000 title claims abstract description 23
- 239000003990 capacitor Substances 0.000 claims description 18
- 238000001514 detection method Methods 0.000 claims description 7
- 238000009825 accumulation Methods 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 8
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 238000003379 elimination reaction Methods 0.000 description 5
- 230000004069 differentiation Effects 0.000 description 3
- 230000008030 elimination Effects 0.000 description 3
- 230000001934 delay Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- 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
- H02J3/01—Arrangements for reducing harmonics or ripples
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal 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
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal 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, e.g. single switched pulse inverters
- H02M7/539—Conversion of dc power input into ac power output without possibility of reversal 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, e.g. single switched pulse inverters with automatic control of output wave form or frequency
- H02M7/5395—Conversion of dc power input into ac power output without possibility of reversal 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, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
- H02M1/15—Arrangements for reducing ripples from dc input or output using active elements
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Definitions
- Embodiments of the present invention relate to harmonic suppression devices that suppress harmonics.
- harmonic suppression device that supplies a compensating current that should be added to the load current to the system line between the AC system and the load to suppress harmonics.
- This harmonic suppression device obtains the deviation between the target value of the compensation current and the compensation current that actually flows, and determines the compensation voltage required to supply the compensation current by proportional/integral calculation (feedback control) using the deviation as an input. , and supplies its compensation voltage to the grid line.
- Harmonics contain high frequency components. In order to suppress high frequency components, it is necessary to increase the gain of the proportional/integral calculation. However, when the gain is increased, the control becomes unstable, such as delay and resonance. As a result, it rather invites an increase in harmonics.
- An object of the embodiments of the present invention is to provide a harmonic suppression device capable of reliably suppressing even harmonics containing high frequency components.
- a harmonic suppression device comprising: a power converter connected to a system line between an AC system and a load to generate an AC voltage and output it to the system line; detecting a harmonic component, obtaining a target value of a compensation current to be added to the load current in order to suppress the harmonic component, and providing the target value with a gain based on the impedance between the system line and the power converter; a control means for obtaining a compensation voltage necessary for supplying the compensation current of the target value to the system line by multiplying by , and causing the power converter to generate and output the compensation voltage.
- FIG. 1 is a block diagram showing the configuration of each embodiment.
- FIG. 2 is a block diagram showing the configuration of a control unit according to the first embodiment; 3 is a block diagram showing a configuration of a feedback control unit in FIG. 2; FIG. 4 is a block diagram showing a configuration of a modification of FIG. 3;
- FIG. FIG. 5 is a block diagram showing the configuration of a control unit according to the second embodiment;
- FIG. 6 is a diagram showing waveforms of two-phase AC voltage, load current, system current, and compensation current in each embodiment.
- 7 is a diagram showing the waveform of the system current and the waveforms of the d-axis component and the q-axis component of the compensating current in FIG. 6;
- FIG. FIG. 8 is a diagram showing, for reference, waveforms of conventional system current and waveforms of d-axis component and q-axis component of compensation current.
- a load 3 is connected to system lines (power lines) Lu, Lv, and Lw of a three-phase AC system (including a three-phase AC power supply, an electric power system, a distribution system, etc.) 1 via a system impedance 2. It is
- the load 3 is a three-phase rectifier circuit 4 that full-wave rectifies the AC voltages (system voltages) Eu, Ev, and Ew of the three-phase AC system 1 by bridge connection of diodes 4a to 4f, which are loads having nonlinear characteristics. It includes a DC capacitor 6 connected to the output terminal of the phase rectifier circuit 4 via a DC reactor 5, an inverter 7 connected across the DC capacitor 6, and the like. The inverter 7 converts the voltage of the DC capacitor 6 into an AC voltage of a predetermined frequency by switching, and outputs the AC voltage as drive power for a compressor motor of an air conditioner, for example.
- a harmonic suppression device 10 of this embodiment is connected to a position between the system impedance 2 and the load 3 in the system lines Lu, Lv, and Lw.
- the harmonic suppression device 10 includes a passive filter 11 for system connection, a power converter 12 connected to the system lines Lu, Lv, and Lw via the passive filter 11, and the passive filters 11 in the system lines Lu, Lv, and Lw.
- a detector (first detection means) arranged between the connection position and the load 3 detects the AC voltages Eu, Ev, and Ew of the three-phase AC system 1 and the currents ILu, ILv, and ILw flowing through the load 3 (referred to as load currents).
- detecting compensation currents also called output currents
- Icu, Icv, and Icw which are arranged between the connection between the passive filter 11 and the power converter 12 and supplied from the power converter 12 to the system lines Lu, Lv, and Lw
- the passive filter 11 is, for example, an interconnection reactor arranged for each phase of the system lines Lu, Lv, and Lw, or an LCL filter arranged for each phase of the system lines Lu, Lv, and Lw by combining inductors and capacitors. .
- the power converter 12 is, for example, a three-phase two-level converter, and includes a switching circuit 12a having a plurality of semiconductor switch elements, a DC capacitor 12b connected across the switching circuit 12a, and a voltage Vco of the DC capacitor 12b. It includes a voltage detector 12c for detecting, and generates a three-phase voltage according to a command (obtained) from the control unit 15 by switching the switching circuit 12a and energizing the DC capacitor 12b accompanying the switching, and applies it to the system lines Lu, Output to Lv and Lw.
- Compensation currents Icu, Icv, and Icw generated by the three-phase voltage are supplied from the power converter 12 to the system lines Lu, Lv, and Lw, thereby suppressing harmonic components contained in the load currents ILu, ILv, and ILw.
- the control unit 15 detects harmonic components contained in the load currents ILu, ILv, and ILw detected by the detector 13, and determines compensation currents to be added to the load currents ILu, ILv, and ILw in order to suppress the harmonic components. Desired values Icu', Icv' and Icw' of Icu, Icv and Icw are obtained, and the impedance Z between the system lines Lu, Lv and Lw and the power converter 12 is calculated for the target values Icu', Icv' and Icw'.
- the compensation voltages Vcu, Vcv, Vcw required to supply the compensation currents Icu, Icv, Icw of the target values Icu', Icv', Icw' to the system lines Lu, Lv, Lw. are obtained, and the compensation voltages Vcu, Vcv and Vcw are generated by the power converter 12 and output.
- the compensation currents Icu, Icv, and Icw to be added to the load currents ILu, ILv, and ILw in order to suppress the harmonic components are defined as follows: Currents to be added to the load currents ILu, ILv, and ILw in order to approximate a synchronous sinusoidal wave.
- the impedance Z between the system lines Lu, Lv, Lw and the power converter 12 is the ratio of the voltage and the current in the electric circuit between the system lines Lu, Lv, Lw and the power converter 10, It is determined by the impedance of the passive filter 11 existing between the connections between Lu, Lv, Lw and the power converter 12 .
- the impedance of the passive filter 11 is generally composed of one or more of the interconnection reactor Lac, the filter reactor Lf, the filter capacitor Cf, and the resistor R.
- a specific configuration of the control unit 15 is shown in FIG.
- the values of the load currents ILu, ILv, and ILw detected by the detector 13 are supplied to a low-pass filter (extracting means) 21 and a computing section (first computing means) 22 .
- the low-pass filter 21 extracts low frequency components of the values of the load currents ILu, ILv and ILw detected by the detector 13 .
- the calculation unit 22 subtracts the low-frequency components extracted by the low-pass filter 21 from the values of the load currents ILu, ILv, and ILw detected by the detector 13, thereby obtaining harmonics contained in the load currents ILu, ILv, and ILw. Detect ingredients.
- the calculation unit 22 sets target values (command values) Icu', Icv', and Icw' of the compensation currents Icu, Icv, and Icw to be added to the load currents ILu, ILv, and ILw in order to suppress the detected harmonic components. calculate.
- This calculation result is supplied to the differential operation section (second operation means) 23 .
- Differential calculation unit 23 holds in advance a predetermined gain G including impedance Z between system lines Lu, Lv, Lw and power converter 12, and calculates target values Icu' and Icv' calculated by calculation unit 22. , Icw' by its gain, the compensation voltages Vcu, necessary for supplying the compensation currents Icu, Icv, Icw of the target values Icu', Icv', Icw' to the system lines Lu, Lv, Lw are obtained. Target values Vcu', Vcv' and Vcw' of Vcv and Vcw are calculated.
- the gain G is set based on the impedance Z. Specifically, it includes the impedance Z and the time differential term "d/dt" with respect to the target values Icu', Icv' and Icw'. For example, if the impedance Z is the interconnection reactor Lac, the product "Lac ⁇ (d/dt)" of the interconnection reactor Lac and the time differential term "d/dt" for the target values Icu', Icv', Icw' is Let the gain be G.
- the resistance R is added to the product of the interconnection reactor Lac and the time differential term "d/dt" for the target values Icu', Icv', Icw'.
- the gain G be Lac ⁇ (d/dt)+R′′.
- the target values Vcu', Vcv', Vcw' of the compensation voltages Vcu, Vcv, Vcw, Vcu' [Lac ⁇ (dIcu'/dt)+R]
- Vcu' [Lac ⁇ (dIcv'/dt) +R]
- Vcw' [Lac.times.(dIcw'/dt)+R].
- the passive filter is an LCL filter composed of an interconnection reactor Lac, a filter capacitor Cf, and a filter reactor Lf
- the time for the interconnection reactor Lac, the filter reactor Lf, and the target values Icu', Icv', and Icw' Product "(Lac+Lf) ⁇ (d/dt)+Lac ⁇ Lf ⁇ Cf ⁇ ( d3 / dt3 )" using the differential term "d/dt" and the third order differential term "d3/ dt3 " ” is the gain G.
- the filter capacitor Cf is to remove the switching ripple component, the third order differential term can be ignored.
- Vcu', Vcv', Vcw' of the compensation voltages Vcu, Vcv, Vcw, Vcu' [(Lac+Lf) ⁇ (dIcu'/dt)]
- Vcu' [(Lac+Lf) x(dIcv'/dt)]
- Vcw' [(Lac+Lf) x (dIcw'/dt)]
- the calculated target values Vcu', Vcv', Vcw' are supplied to the pulse width modulation circuit (PWM; drive means) 25 via the adding section 24.
- the pulse width modulation circuit 25 pulse-width modulates the sinusoidal voltages of the same frequency as the AC voltages Eu, Ev, and Ew detected by the detector 13 with the target values Vcu', Vcv', and Vcw', so that the power converter It generates and outputs a plurality of gate signals (on and off signals) for driving the 12 switching circuits 12a.
- the switching elements of the switching circuit 12a of the power converter 12 are turned on and off by these gate signals, whereby the compensation voltages Vcu, Vcv and Vcw of the target values Vcu', Vcv' and Vcw' are output from the power converter 12. output.
- compensation currents Icu, Icv, and Icw of target values Icu', Icv', and Icw' flow from the power converter 12 to the system lines Lu, Lv, and Lw.
- These compensation currents Icu, Icv and Icw suppress harmonic components contained in the load currents ILu, ILv and ILw.
- Waveforms of AC voltages Eu and Ev extracted from two phases in the three-phase AC system 1 waveforms of load currents ILu and ILv, waveforms of system currents Iu and Iv in the three-phase AC system 1, and waveforms of compensation currents Icu and Icv It is shown in FIG.
- the harmonic components contained in the load currents ILu, ILv, and ILw are detected, and the targets of the compensation currents Icu, Icv, and Icw to be added to the load currents ILu, ILv, and ILw in order to suppress the harmonic components are determined.
- Compensation currents Icu, Icv, The compensation voltages Vcu, Vcv, Vcw required for Icw to be supplied to the system lines Lu, Lv, Lw can be obtained directly from the target values Icu', Icv', Icw'. Therefore, the appropriate compensation voltages Vcu, Vcv, and Vcw can sufficiently cope with harmonics including high frequency components without causing delay or resonance, unlike conventional devices that require increased gains in proportional/integral calculations. can be obtained.
- FIG. 7 shows the waveforms of the system currents Iu and Iv in this embodiment in a temporally enlarged manner, and shows one compensating current Icu in this embodiment as a waveform of the d-axis component and an electrical waveform of the d-axis component. and the waveform of the q-axis component whose phase is shifted by 90 degrees.
- the d-axis component and the q-axis component can be caused to appropriately follow the target values.
- the values of the AC voltages Eu, Ev, and Ew detected by the detector 13 are supplied to the adder 24, and the AC The values of the voltages Eu, Ev and Ew are added to the target values Vcu', Vcv' and Vcw' in the adder 24.
- the target values Vcu', Vcv' and Vcw' passed through the adder 24 are supplied to the pulse width modulation circuit 25.
- FIG. As a result, it is possible to solve the problem that unnecessary fluctuations in the AC voltages Eu, Ev and Ew are superimposed on the compensation voltages Vcu, Vcv and Vcw.
- the 2 an arithmetic unit (third arithmetic means) 26, an arithmetic unit (fourth arithmetic means) 27, a voltage control unit 28 and a feedback control unit 30 are added to the control unit 15. As shown in FIG.
- the calculation unit 26 calculates the deviation (Icu'-Icu) between the target values Icu', Icv' and Icw' calculated by the calculation unit 22 and the actual compensation current values Icu, Icv and Icw detected by the detector 14. , (Icv'-Icv), and (Icw'-Icw).
- the calculation unit 27 calculates the deviation ⁇ Vco between the standard value Vcos predetermined for the voltage Vco of the capacitor 12b in the power converter 12 and the actual voltage Vco of the capacitor 12b detected by the voltage detector 12c of the power converter 12. Ask for
- the voltage control unit 28 multiplies the deviation ⁇ Vco obtained by the calculation unit 27 by a predetermined voltage control gain to obtain the deviation (Icu′ ⁇ Icu), (Icv'-Icv), and (Icw'-Icw), the correction value .DELTA.Ico to be added is obtained.
- the calculation unit 26 outputs the deviations ⁇ Icu, ⁇ Icv, and ⁇ Icw obtained by adding the correction value ⁇ Ico to the deviation obtained above.
- the feedback control unit 30 sets the correction value ⁇ Vcu' to be added to the target values Vcu', Vcv', Vcw' calculated by the differentiation calculation unit 23 so that the deviations ⁇ Icu, ⁇ Icv, ⁇ Icw obtained by the calculation unit 26 become zero.
- .DELTA.Vcv' and .DELTA.Vcw' are obtained by proportional calculation or proportional/integral calculation using the deviations .DELTA.Icu, .DELTA.Icv and .DELTA.Icw output from the calculation unit 26 as inputs.
- the calculated correction values ⁇ Vcu', ⁇ Vcv' and ⁇ Vcw' are added to the target values Vcu', Vcv' and Vcw' in the adder 24, respectively.
- the voltage Vco of the capacitor 12b in the power converter 12 can be maintained at a constant standard value without being greatly affected by unexpected disturbances to the compensation currents Icu, Icv, and Icw and errors in the assumed impedance Z.
- appropriate compensation voltages Vcu, Vcv and Vcw can be obtained.
- the feedback control unit 30 converts the deviations ⁇ Icu, ⁇ Icv, and ⁇ Icw supplied from the computing unit 26 into an AC voltage Eu by a loop configuration of an adding unit 31, a holding unit 32, and an integrating unit (LPF) 33. . is added to the deviations .DELTA.Icu, .DELTA.Icv, .DELTA.Icw supplied from . Then, the feedback control unit 30 multiplies the deviations ⁇ Icu, ⁇ Icv, and ⁇ Icw that have passed through the addition unit 35 by the proportional gain Kp in the proportional calculation unit 36, and simultaneously multiplies them by the integral gain Ki/s in the integral calculation unit 37.
- LPF integrating unit
- the target values Vcu', Vcv', Vcw' calculated by the differentiation calculation section 23 are obtained by adding these multiplication results in the addition section 38 so that the deviations .DELTA.Icu, .DELTA.Icv, .DELTA.Icw obtained in the calculation section 26 become zero.
- Correction values .DELTA.Vcu', .DELTA.Vcv' and .DELTA.Vcw' to be added to are obtained.
- Deviations ⁇ Icu, ⁇ Icv and ⁇ Icw are accumulated while holding and integrating for each cycle of AC voltages Eu, Ev and Ew, and the accumulation result is multiplied by repetition gain Krc to obtain periodic errors in deviations ⁇ Icu, ⁇ Icv and ⁇ Icw. is being reduced.
- the multiplication result may be configured to add lead compensation processing by a loop configuration of the lead compensator 41 and the adder 42 .
- lead compensation processing it is possible to compensate for the delay time of processing due to the proportional/integral calculations of the proportional calculation section 36 and the integral calculation section 37 .
- FIG. 5 shows the configuration of the control section 15 in the second embodiment of the present invention.
- a band-removal filter (first band-removal means) is provided on the signal path from the calculation unit 22 for calculating the target values Icu', Icv' and Icw' to the differentiation calculation unit 23 for calculating the target values Icu', Icv' and Icw'.
- 51 and holding portion 52 are arranged in sequence.
- a band elimination filter (second band elimination means) 52 is arranged on a signal path from the detector 14 for detecting the values of the compensation currents Icu, Icv and Icw to the calculating section 26 for obtaining the deviations ⁇ Icu, ⁇ Icv and ⁇ Icw. .
- the band-elimination filter 51 sets the target values Icu', Icv', Icw ', a predetermined frequency band is removed.
- the resonance is set to the target values Icu', Icv', This is avoided by band removal processing for Icw'.
- the holding unit 52 stores the target values through the band-elimination filter 51 in order to compensate for deviations between the target values Icu', Icv', Icw' and the actual compensation currents Icu, Icv, Icw due to control delays and detection delays. Icu', Icv' and Icw' are held successively in one cycle of the AC voltages Eu, Ev and Ew.
- the band elimination filter 52 is, for example, a notch filter, and is used to eliminate the problem that harmonic components are superimposed on the compensation currents Icu, Icv, and Icw detected by the detector 14 due to the adoption of the feedback control unit 30, and A predetermined frequency band is removed from the compensation currents Icu, Icv, and Icw detected by the detector 14 in order to eliminate the problem that the harmonic components are amplified by the gain of the feedback control section 30 .
- the control unit 15 by rotating coordinate transformation based on the phases of the AC voltages Eu, Ev, and Ew, the d-axis components having the same phase as the AC voltages Eu, Ev, and Ew are controlled, and the d-axis components are controlled.
- the control may be performed separately from the control of the q-axis component whose phase is electrically shifted by 90 degrees. Thereby, an interference term between each phase and between the d-axis and the q-axis in the power converter 12 can be removed.
- the load currents ILu, ILv, ILw are transformed into rotating coordinates, only the DC amount is extracted from the load currents ILu, ILv, ILw containing harmonic components, and by subtracting it from the original load currents ILu, ILv, ILw, , the target values Icu', Icv' and Icw' of the load currents ILu, ILv and ILw can be obtained.
- SYMBOLS 1 System power supply, 2... Load, Lu, Lv, Lw... System line, 10... Harmonic suppression apparatus, 11... Passive filter, 12... Power converter, 12a... Switching circuit, 12b... Capacitor, 12c... Voltage detector , 13, 14 detector, 15 controller, 21 low-pass filter (extraction means), 22 calculator (first calculator), 23 differential calculator (second calculator), 25 pulse width modulation circuit (driving means)
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Inverter Devices (AREA)
Abstract
Description
図1に示すように、3相交流系統(3相交流電源、電力系統、配電系統などを含む)1の系統ライン(電源ライン)Lu,Lv,Lwに系統インピーダンス2を介して負荷3が接続されている。
検出器13で検出される負荷電流ILu,ILv,ILwの値がローパスフィルタ(抽出手段)21および演算部(第1演算手段)22に供給される。ローパスフィルタ21は、検出器13で検出される負荷電流ILu,ILv,ILwの値の低周波数成分を抽出する。演算部22は、ローパスフィルタ21で抽出された低周波数成分を検出器13で検出された負荷電流ILu,ILv,ILwの値から減算することにより、負荷電流ILu,ILv,ILwに含まれる高調波成分を検出する。そして、演算部22は、検出した高調波成分を抑制するために負荷電流ILu,ILv,ILwに加えるべき補償電流Icu,Icv,Icwの目標値(指令値)Icu´,Icv´,Icw´を算出する。この算出結果が微分演算部(第2演算手段)23に供給される。
目標値Icu´,Icv´,Icw´を算出する演算部22から目標値Icu´,Icv´,Icw´を算出する微分演算部23にかけての信号路に、帯域除去フィルタ(第1帯域除去手段)51および保持部52が順次に配置される。さらに、補償電流Icu,Icv,Icwの値を検出する検出器14から偏差ΔIcu,ΔIcv,ΔIcwを求める演算部26にかけての信号路に、帯域除去フィルタ(第2帯域除去手段)52が配置される。
上記各実施形態では、電力変換器12として3相2レベル変換器を用いたが、それに限らずマルチレベル変換器を用いてもよい。
Claims (12)
- 交流系統と負荷との間の系統ラインに接続され、交流電圧を生成しそれを前記系統ラインへ出力する電力変換器と、
前記系統ラインに流れる負荷電流の高調波成分を検出し、その高調波成分を抑制するために前記負荷電流に加えるべき補償電流の目標値を求め、その目標値に前記系統ラインと前記電力変換器との間のインピーダンスに基づくゲインを乗算することにより、その目標値の補償電流を前記系統ラインに供給するために必要な補償電圧を求め、その補償電圧を前記電力変換器で生成し出力させる制御手段と、
を備える高調波抑制装置。 - 前記ゲインは、前記インピーダンスを含むとともに前記目標値に対する時間微分項を含む、
請求項1に記載の高調波抑制装置。 - 前記系統ラインと前記電力変換器との接続間に設けられた系統連係用のパッシブフィルタ、
をさらに備える、
請求項1に記載の高調波抑制装置。 - 前記制御手段は、
前記負荷電流を検出する第1検出手段と、
前記第1検出手段で検出される負荷電流の低周波数成分を抽出する抽出手段と、
前記抽出手段で抽出される低周波数成分を前記第1検出手段で検出される負荷電流から減算することによりその負荷電流に含まれる高調波成分を検出し、この高調波成分を抑制するために前記負荷電流に加えるべき補償電流の目標値を算出する第1演算手段と、
前記第1演算手段で算出される目標値に、前記系統ラインと前記電力変換器との間のインピーダンス及びその目標値に対する時間微分項が含まれるゲインを乗算することにより、前記第1演算手段で算出される目標値の補償電流を前記系統ラインに供給するために必要な補償電圧の目標値を算出する第2演算手段と、
前記第2演算手段で算出される目標値に応じて前記電力変換器を駆動することにより、その目標値の補償電圧を前記電力変換器で生成し出力させる駆動手段と、
を含む、
請求項1に記載の高調波抑制装置。 - 前記ゲインは、
前記インピーダンスが連系リアクトルLacの場合には、連系リアクトルLacと前記目標値Icu´,Icv´,Icw´に対する時間微分項“d/dt”との積“Lac×(d/dt)”であり、
前記インピーダンスが連系リアクトルLacおよび抵抗Rの場合には、連系リアクトルLacと前記時間微分項“d/dt”との積に抵抗Rを加えた“Lac×(d/dt)+R”であり、
前記インピーダンスが連系リアクトルLacとフィルタコンデンサCf、フィルタリアクトルLfから構成されるLCLフィルタの場合には、連系リアクトルLacとフィルタリアクトルLfと前記時間微分項“d/dt”との積“(Lac+Lf)×(d/dt)”である、
請求項4に記載の高調波抑制装置。 - 前記制御手段は、
前記電力変換器から前記系統ラインに供給される補償電流を検出する第2検出手段と、
前記第1演算手段で算出される目標値と前記第2検出手段で検出される補償電流の値との偏差を求める第3演算手段と、
前記第3演算手段で求められる偏差が零となるよう、前記第2演算手段で算出される目標値に加えるべき補正値を、前記第3演算手段で求められる偏差を入力とする比例演算または比例・積分演算により求めるフィードバック制御手段と、
前記フィードバック制御手段で求められる補正値を前記第2演算手段で算出される目標値に加える加算手段と、
をさらに含む、
請求項3に記載の高調波抑制装置。 - 前記フィードバック制御手段は、前記第3演算手段で求められる偏差を前記交流系統の交流電圧の周期ごとに保持および積分しながら積算し、この積算結果に所定の繰返しゲインを乗算し、この乗算結果を前記第3演算手段で求められる偏差に加算し、この加算結果を入力とする比例演算または比例・積分演算により、前記第3演算手段で求められる偏差が零となるよう、前記第2演算手段で算出される目標値に加えるべき補正値を求める、
請求項6に記載の高調波抑制装置。 - 前記フィードバック制御手段は、前記繰返しゲインの乗算結果に対し、前記比例演算または前記比例・積分演算による処理の遅れ時間を補償するための進み補償処理を加える、
請求項7に記載の高調波抑制装置。 - 前記制御手段は、
前記第1演算手段で算出される目標値のうち所定の周波数帯域を除去する第1帯域除去手段、
をさらに含み、
前記第2演算手段は、前記第1帯域除去手段を経た目標値に、前記ゲインを乗算することにより、前記第1演算手段で算出される目標値の補償電流を前記系統ラインに供給するために必要な補償電圧の目標値を算出する、
請求項4に記載の高調波抑制装置。 - 前記制御手段は、
前記第1演算手段で算出される目標値を前記交流系統の交流電圧の一周期において逐次に保持する保持手段、
をさらに含み、
前記第2演算手段は、前記保持手段で保持される目標値に、前記ゲインを乗算することにより、前記第1演算手段で算出される目標値の補償電流を前記系統ラインに供給するために必要な補償電圧Vcu,Vcv,Vcwの目標値Vcu´,Vcv´,Vcw´を算出する、
請求項4に記載の高調波抑制装置。 - 前記制御手段は、
前記第2検出手段で検出される補償電流Icu,Icv,Icwの値のうち所定の周波数帯域を除去する第2帯域除去手段、
を含み、
前記第3演算手段は、前記第1演算手段で算出される目標値Icu´,Icv´,Icw´と前記第2帯域除去手段の処理を経た補償電流Icu,Icv,Icwとの偏差ΔIcu,ΔIcv,ΔIcwを求める、
請求項6に記載の高調波抑制装置。 - 前記負荷は、前記交流電源の電圧を整流するダイオードブリッジの整流回路と、この整流回路の出力端に直流リアクトルを介して接続された直流コンデンサと、この直流コンデンサの電圧を所定周波数の交流電圧に変換するインバータと、を含む、
請求項1から請求項9のいずれか一項に記載の高調波抑制装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2023530464A JPWO2022270470A1 (ja) | 2021-06-25 | 2022-06-20 | |
EP22828387.5A EP4362308A1 (en) | 2021-06-25 | 2022-06-20 | High harmonic suppression device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021-105347 | 2021-06-25 | ||
JP2021105347 | 2021-06-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022270470A1 true WO2022270470A1 (ja) | 2022-12-29 |
Family
ID=84545701
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2022/024555 WO2022270470A1 (ja) | 2021-06-25 | 2022-06-20 | 高調波抑制装置 |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4362308A1 (ja) |
JP (1) | JPWO2022270470A1 (ja) |
WO (1) | WO2022270470A1 (ja) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01227630A (ja) | 1988-03-04 | 1989-09-11 | Mitsubishi Electric Corp | アクテイブフイルタ装置 |
JP2005532027A (ja) * | 2002-06-25 | 2005-10-20 | インターナショナル レクティフィアー コーポレイション | 能動emiフィルタ |
JP2012143094A (ja) * | 2011-01-04 | 2012-07-26 | Mitsubishi Electric Corp | 高調波電流補償装置 |
JP5713044B2 (ja) | 2013-04-15 | 2015-05-07 | ダイキン工業株式会社 | 制御装置 |
JP2015092813A (ja) * | 2013-09-30 | 2015-05-14 | ダイキン工業株式会社 | 電力変換装置 |
-
2022
- 2022-06-20 WO PCT/JP2022/024555 patent/WO2022270470A1/ja active Application Filing
- 2022-06-20 EP EP22828387.5A patent/EP4362308A1/en active Pending
- 2022-06-20 JP JP2023530464A patent/JPWO2022270470A1/ja active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01227630A (ja) | 1988-03-04 | 1989-09-11 | Mitsubishi Electric Corp | アクテイブフイルタ装置 |
JP2005532027A (ja) * | 2002-06-25 | 2005-10-20 | インターナショナル レクティフィアー コーポレイション | 能動emiフィルタ |
JP2012143094A (ja) * | 2011-01-04 | 2012-07-26 | Mitsubishi Electric Corp | 高調波電流補償装置 |
JP5713044B2 (ja) | 2013-04-15 | 2015-05-07 | ダイキン工業株式会社 | 制御装置 |
JP2015092813A (ja) * | 2013-09-30 | 2015-05-14 | ダイキン工業株式会社 | 電力変換装置 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2022270470A1 (ja) | 2022-12-29 |
EP4362308A1 (en) | 2024-05-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AU2017336039B2 (en) | Control device for active filter | |
JP6295782B2 (ja) | 電力変換装置、発電システム、制御装置および電力変換方法 | |
US9509229B2 (en) | Power supply apparatus including power conversion circuit controlled by PWM control circuit | |
US9735698B2 (en) | Method of controlling power conversion apparatus | |
WO2014050441A1 (ja) | 電力変換装置の制御方法 | |
KR20080067958A (ko) | 인버터 장치 | |
JP5622437B2 (ja) | 中性点クランプ式電力変換装置 | |
JP2008306805A (ja) | 電力変換装置 | |
JP2016158323A (ja) | アクティブフィルタを備えた高調波抑制装置 | |
JP2017060272A (ja) | 3レベルインバータの制御装置 | |
WO2016114330A1 (ja) | 5レベル電力変換器および制御方法 | |
JP5787053B2 (ja) | 3相v結線コンバータの制御装置 | |
WO2022270470A1 (ja) | 高調波抑制装置 | |
CN113826314A (zh) | 电力转换装置以及具备该装置的电动车辆系统 | |
JP3323759B2 (ja) | パルス幅変調コンバータ装置 | |
JP4842179B2 (ja) | 電力変換装置及びその制御方法 | |
JP5169396B2 (ja) | 電力変換装置の制御回路 | |
WO2015008401A1 (ja) | 3相4線式インバータの制御装置 | |
JP7260071B2 (ja) | 電力変換装置の制御装置 | |
CN110277933B (zh) | 电力转换装置的控制装置以及控制方法 | |
EP3782278B1 (en) | System and method for power conversion | |
JP2658620B2 (ja) | 電力変換器の制御回路 | |
JP6340970B2 (ja) | 制御装置 | |
JPH0731156A (ja) | 3相インバータの制御装置 | |
JP3394529B2 (ja) | 電力変換装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22828387 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2023530464 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2022828387 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2022828387 Country of ref document: EP Effective date: 20240125 |