• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An active filtering system (AF) arranged to connect between a first power line (10) and a second power line (11) of a DC bus, said bus being arranged to be connected to an upstream DC voltage source, said system comprising: A first capacitor (C1) arranged to connect on the one hand to the first power supply line of the bus (10) and on the other hand to the second line of power supply (11) of the bus and across which is applied a voltage (VC1) comprising an AC component (VC1), a switching assembly (SW) controlled by processing means (UC) for generating a compensation voltage (VAF) , in opposition to the alternating component (VC1) of the voltage across the first capacitor (C1), and comprising a first terminal (B1) connected to the first capacitor (C1) and a second terminal (B2) intended to connect to the second feed line (11).
    公开号:FR3034929A1
    申请号:FR1552997
    申请日:2015-04-08
    公开日:2016-10-14
    发明作者:Miao-Xin Wang；Alain Dentella；Rajesh Ghosh
    申请人:Schneider Electric Industries SAS；
    IPC主号:
    专利说明:

    [0001] TECHNICAL FIELD OF THE INVENTION The present invention relates to an active filtering system. This system is intended to be connected to a source of DC voltage located upstream.
    [0002] STATE OF THE ART One-phase inverters are commonly used in voltage converters for UPS applications (Uninterruptible Power Supply) or in the field of photovoltaics.
    [0003] In these applications, a DC supply bus comprising two power supply lines is connected upstream to a DC voltage source, for example photovoltaic panels or a battery, and downstream to a controlled inverter to generate a variable voltage at a voltage. electrical charge. A filter solution is used to control the voltage variations present at the input. Usually, to avoid these voltage variations, one or more filter capacitors are connected to the first power line and the second bus power line. The capacitance of the capacitors must be sufficient to absorb the ripple of the input voltage. The capacitors are often of chemical type and have a bulk, a high cost and a limited life. To overcome these disadvantages, active filtering systems have been proposed. The patent application US2014 / 369090 describes an active filtering system intended to be connected to an upstream DC voltage source and to a downstream inverter connected to a load. The system is connected in series on the DC bus. This solution of the state of the art has several drawbacks, among which: the presence of a very high voltage ripple at the output of the DC bus (Vout1 in FIG. 1 of the document); in the active filtering system, using transistors which hold the supply DC bus voltage, making the solution costly, generating high losses and complex, the transistors of the system to be controlled with power supplies and gate control circuits isolated. - The system is connected directly in series on the DC bus, the need to size most components to keep the maximum current of the load, which causes high losses and increases the overall cost of the solution.
    [0004] The object of the invention is to propose an active filtering system intended to connect to a continuous supply bus, which is particularly compact, of low cost and which generates limited losses. SUMMARY OF THE INVENTION This object is achieved by an active filtering system arranged to connect between a first supply line and a second supply line of a DC bus, said bus being arranged to be connected to a source. a DC voltage located upstream, said system comprising: a first capacitor arranged to connect firstly to the first power supply line of the bus and secondly to the second power supply line of the bus and at the terminals of which A voltage is applied comprising an alternating component, a switching assembly controlled by processing means for generating a compensation voltage, in opposition to the AC component of the voltage across the first capacitor, and comprising a first terminal connected to the first one. capacitor and a second terminal for connecting to the second power line. According to a first embodiment, the switching assembly comprises a first transistor, a second transistor connected on the one hand to the first transistor and on the other hand to its second terminal, and an inductor connected to its first terminal and to a second transistor. intermediate connection point located between the two transistors and a second capacitor connected on the one hand to the second terminal and on the other hand to the first transistor.
    [0005] According to a second embodiment, the switching assembly comprises: a first transistor, a second transistor connected in series with the first transistor and an inductance connected to its first terminal and at a connection midpoint located between the two transistors, a second capacitor connected in parallel with the two transistors, a third transistor and a fourth transistor connected in series and in parallel with the second capacitor, the midpoint located between the third transistor and the fourth transistor being connected to its second terminal.
    [0006] According to a feature, the system of the invention comprises a third capacitor connected to the first terminal of the switching assembly and to the second terminal of the switching assembly.
    [0007] BRIEF DESCRIPTION OF THE FIGURES Other features and advantages will appear in the following detailed description with reference to the accompanying drawings, in which: FIG. 1 schematically represents the architecture of the active filtering system of the invention, FIG. 2 represents an electronic diagram of an exemplary embodiment of the active filtering system of the invention, FIG. 3 represents the control block diagram of the switching assembly used in the active filtering system of the invention, Figure 4 shows an alternative embodiment of the switching assembly employed in the active filtering system of the invention. DETAILED DESCRIPTION OF AT LEAST ONE EMBODIMENT The invention relates to an active filtering system intended to connect to a DC supply bus, said bus comprising a first power supply line 10, for example having a positive electrical potential and a second power supply line 11, for example with a negative electric potential. Said continuous supply bus is for example connected to a DC voltage source, for example one or more photovoltaic panels or a battery. The DC voltage supplied by the bus is for example applied at the input of an inverter (DC / AC) comprising controlled transistors for generating a variable voltage at an electric charge C. The active filtering system AF of the invention comprises: a first capacitor C1 arranged to connect on the one hand to the first power supply line 10 of the bus and on the other hand to the second power supply line 11 of the bus and to whose terminals a voltage Vc is applied, comprising an alternating component, a switching assembly SW arranged to generate a compensation voltage VAF, in opposition to the AC component of the voltage across the terminals of the first capacitor Ci, and comprising a first terminal B1 connected to the first capacitor C1 and a second terminal B2 for connecting to the second power line 11.
    [0008] The switching assembly SW must be controlled so that the equivalent capacity of the active filtering system is as high as possible. The equivalent capacitance Ceq is indeed: Ceq = C1 / (1-k) with C1 the capacitance of the first capacitor C1 and k a compensation gain.
    [0009] From this relation, it is understood that for a value of k close to 1, less than 1, but not equal to 1, the equivalent capacitance will be very high, making it possible to considerably improve the filtering at the ripple frequency of the input voltage. Figure 1 illustrates the operating principle of the active filtering system 20 of the invention. The control of the switching assembly SW is carried out so as to generate a voltage VAF which is added to the voltage Vc, across the terminals of the first capacitor C1 so as to act on the voltage Vdc of the continuous supply bus which results of the sum of the voltages VAF and VC1. As a function of the value of the voltage Vc, at the terminals of the first capacitor 25 Ci, processing means UC extract the oscillations of this voltage and then determine the control signals CTi, CT2, for example of the PWM type (Wavelength Modulation). Pulse), to be applied to the switching assembly SW to compensate for these oscillations.
    [0010] More specifically, with reference to FIG. 3, the operating principle is as follows: In a first step, the voltage Vc, measured by conventional measuring means, is filtered by the processing means UC using a band-pass filter Pb in order to block its DC component and its high-frequency ripples and to keep only its AC component 9c1. In a second step, the processing means UC apply a gain to the AC component -Vci of the voltage in order to adjust the degree of compensation. The gain is preferably -k, k having a value close to 1 but always less than 1 for the solution to remain stable. After applying an offset e to a third step, the processing means obtain a reference value VAF ref to be reached for the voltage across the switching assembly SW. In a fourth step, the processing means implement a regulation loop in which the reference value VAF ref is injected. The regulation loop consists in determining the difference between the reference value VAF ref to be achieved and a value VAF. the voltage measured by conventional measuring means across the switching assembly SW. The difference obtained is injected into a regulator, for example proportional-integral-derivative (PID). At the output of the regulation loop, the control commands CT15 20 CT2 to be applied to the switching assembly SW are obtained so that the voltage VAF across the switching assembly reaches the reference value VAF. control CTi, CT2 are complementary, that is to say that the transistors 11 and 12 are never in the closed state at the same time. When the transistor 11 is controlled in the closed state (the transistor 12 is then in the open state), it drives the current and the voltage VAF increases and tends towards the value of VAUX. When the transistor 12 is controlled in the closed state (the transistor 11 is then in the open state), it conducts the current and the voltage VAF decreases to tend towards O.
    [0011] Advantageously, the switching assembly comprises a first transistor 11 and a second transistor 12. The second transistor 12 is connected to the second terminal B2 of the switching assembly SW and to the first transistor 11. It also comprises a connected inductor Li on the one hand to the first terminal B1 of the switching assembly and to the midpoint located between the two transistors Ii, 3034929 6 12. It also comprises a capacitor O2, designated second capacitor, connected to the first transistor 11 and to the second terminal B2 of the switching assembly SW. The assembly formed by the two transistors 11, 12 and the inductor Li operates as a power amplifier which makes it possible to generate the voltage VAF 5 intended to compensate for the AC component Vci of the voltage Vc, across the terminals of the first capacitor Ci. second capacitor 02 makes it possible to create an electric potential VAUX with respect to the second supply line L2 of the DC bus for supplying the power amplifier of the switching assembly SW. The role of the second capacitor 02 is notably to absorb the variation of power and to limit the variation of the potential Vaux. Preferably, the power amplifier may comprise a capacitor 03, designated third capacitor, which makes it possible, in collaboration with the inductor Li, to smooth the voltage VAF generated by the switching of the two transistors I1, 12. This third capacitor 03 is connected between the first terminal 131 and the second terminal B2 of the switching assembly SW. The transistors Ii, 12 are sized to hold the voltage Vaux. Typically, the voltage Vaux can be of the order of 1 / 20th of the voltage Vdc of the DC supply bus. The switching assembly formed by the transistors T1, 12 and the inductor Li are sized to withstand a current of the order of the peak value of the AC component of the charging current. The voltage VAUX to withstand being low, the transistors T1 and 12 can be of low voltage MOSFET type, with the advantage of switching at very high frequency (hundred kHz, up to MHz) and having very low conduction losses (RDson very low of the order of milliOhm) and switching. The inductance Li may thus have a low value. FIG. 4 shows an alternative embodiment of the switching assembly SW used in the active filtering system AF of the invention. In this second topology, the switching assembly SW comprises two additional transistors 13, 14 connected in parallel with the second capacitor O2. Moreover, the second terminal B2 of the switching assembly SW is no longer connected to the second capacitor O2. and at the second transistor 12 but at the mid-point between the two transistors 13, 14. As in the previous topology, the third capacitor 03 may be provided and connected between the first terminal 131 and the second terminal B2. This second topology makes it possible in particular to reduce the voltage applied to the second capacitor O2 and to be able to be used to generate an alternating voltage, replacing the DC supply bus. The solution of the invention thus has several advantages, among which: - Limited size, - Reduced losses, - Moderate cost, - Easy installation and reliable operation.
    权利要求:
    Claims (4)
    [0001]
    REVENDICATIONS1. An active filtering system (AF) arranged to connect between a first power line (10) and a second power line (11) of a DC bus, said bus being arranged to be connected to a DC voltage source located upstream, said system being characterized in that it comprises: A first capacitor (C1) arranged to connect on the one hand to the first power line of the bus (10) and on the other hand to the second line bus power supply (11) and across which a voltage (Vci) comprising an AC component (/ cl) is applied, A switching assembly (SW) controlled by processing means (UC) for generating a compensation voltage (VAF), in opposition to the AC component (Vc1) of the voltage across the terminals of the first capacitor (C1), and comprising a first terminal (B1) connected to the first capacitor (C1) and a second terminal (B2) intended to connect to the second power line (11).
    [0002]
    2. System according to claim 1, characterized in that the switching assembly (SW) comprises a first transistor (T1), a second transistor (12) connected firstly to the first transistor (T1) and secondly at its second terminal (B2), and an inductor (L1) connected to its first terminal (B1) and to a connection midpoint located between the two transistors and a second capacitor (02) connected on the one hand to the second terminal (B2) and secondly to the first transistor (T1).
    [0003]
    3. System according to claim 1, characterized in that the switching assembly (SW) comprises: a first transistor (T1), a second transistor (12) connected in series with the first transistor (T1) and an inductor (L1) connected to its first terminal (B1) and to a connection midpoint located between the two transistors, a second capacitor (02) connected in parallel with the two transistors (T1, 12), a third transistor (13) and a fourth transistor ( 14) connected in series and in parallel with the second capacitor (02), the midpoint located between the third transistor (13) and the fourth transistor (14) being connected to its second terminal (B2).
    [0004]
    4. System according to claim 2 or 3, characterized in that it comprises a third capacitor (03) connected to the first terminal (B-1) of the switching assembly (SW) and to the second terminal (B2 ) of the switching assembly (SW). 10
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    CN106059272A|2016-10-26|
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE3612380A1|1986-04-12|1987-10-15|Philips Patentverwaltung|Circuit arrangement for reducing an interference current which is caused in a load|
    GB2248981A|1990-09-10|1992-04-22|Sundstrand Corp|Electric power generating system with active damping|
    WO1996002969A1|1994-07-18|1996-02-01|Regents Of The University Of Minnesota|Hybrid filter for reducing distortion in a power system|
    US5999422A|1997-03-13|1999-12-07|Asea Brown Boveri Ab|Control equipment for an active filter|
    US6583999B1|2002-01-25|2003-06-24|Appletec Ltd.|Low output voltage, high current, half-bridge, series-resonant, multiphase, DC-DC power supply|
    WO2007090481A2|2006-02-09|2007-08-16|Siemens Aktiengesellschaft|Hybrid filter|
    JP2791273B2|1993-09-07|1998-08-27|株式会社東芝|Power converter|
    AU4105296A|1994-10-26|1996-05-23|Board Of Trustees Of The University Of Illinois, The|Feedforward active filter for output ripple cancellation in switching power converters|
    FR2734100B1|1995-05-11|1997-06-27|Schneider Electric Sa|FILTERING DEVICE|
    US5731965A|1996-06-21|1998-03-24|Wisconsin Alumni Research Foundation|Power line harmonic reduction by hybrid parallel active/passive filter system with square wave inverter and DC bus control|
    FR2767610B1|1997-08-21|1999-10-01|Schneider Electric Sa|FILTERING DEVICE HAVING A CONTROL CIRCUIT AND ELECTRIC APPARATUS HAVING SUCH A DEVICE|
    FR2772526B1|1997-12-17|2000-02-11|Schneider Electric Sa|ALTERNATIVE-CONTINUOUS THREE-PHASE CONVERTER|
    US6489755B1|2000-09-18|2002-12-03|Adtran, Inc.|Active ripple and noise filter for telecommunication equipment powering|
    US6424207B1|2001-04-18|2002-07-23|Northrop Grumman Corporation|PWM active filter for DC power systems|
    WO2003102710A1|2002-05-31|2003-12-11|Catena Networks, Inc.|Apparatus and method of controlling low frequency load currents drawn from a dc source in a telecommunications system|
    US8286006B2|2008-01-29|2012-10-09|At&T Intellectual Property I, Lp|Packetized power|
    US8116105B2|2008-02-07|2012-02-14|American Power Conversion Corporation|Systems and methods for uninterruptible power supply control|
    US7881079B2|2008-03-24|2011-02-01|American Power Conversion Corporation|UPS frequency converter and line conditioner|
    TWI356566B|2008-10-03|2012-01-11|Ablerex Electronics Co Ltd|Ripple voltage suppression method for dc/dc conver|
    US8169201B2|2009-05-05|2012-05-01|City University Of Hong Kong|Output compensator for a regulator|
    US8279642B2|2009-07-31|2012-10-02|Solarbridge Technologies, Inc.|Apparatus for converting direct current to alternating current using an active filter to reduce double-frequency ripple power of bus waveform|
    KR101727784B1|2010-11-02|2017-04-17|주식회사 아도반테스토|Power supply noise reduction circuit and power supply noise reduction method|
    KR20120074089A|2010-12-27|2012-07-05|재단법인 포항산업과학연구원|Circuit for removing ripple current|
    GB2487368B|2011-01-18|2012-12-05|Enecsys Ltd|Inverters|
    US8461774B2|2011-03-15|2013-06-11|General Electric Company|Lighting power circuit with peak current limiter for EMI filter|
    CN104054226B|2011-10-17|2018-01-12|金斯顿女王大学|Pulsation neutralizing converter with high power factor|
    CN104205605B|2012-03-26|2017-03-08|株式会社村田制作所|DC-to-AC converter|
    FR2991833B1|2012-06-06|2015-12-18|Valeo Sys Controle Moteur Sas|ABSORPTION CIRCUIT FOR POWER RIPPING ASSOCIATED METHOD|
    US9293248B2|2012-12-12|2016-03-22|Raytheon Company|Methods and apparatus for EMI filter having switched capacitance based on loading|
    JP2014241711A|2013-04-19|2014-12-25|シャフナー・エーエムファウ・アクチェンゲゼルシャフト|Active EMC filter|CN109274281B|2017-07-12|2021-04-02|丰郅新能源科技有限公司|Suppression system and suppression method for low-frequency input pulsating current of photovoltaic grid-connected inverter|
    JP6890087B2|2017-12-18|2021-06-18|株式会社日立製作所|Railroad vehicles, active filter devices for railroad vehicles, and railroad systems|
    JPWO2021140544A1|2020-01-06|2021-07-15|
    CN112234833A|2020-09-29|2021-01-15|西安交通大学|Direct-current magnetic bias suppression method and device for double-active-bridge direct-current converter|
    法律状态:
    2016-04-13| PLFP| Fee payment|Year of fee payment: 2 |
    2016-10-14| PLSC| Publication of the preliminary search report|Effective date: 20161014 |
    2017-04-06| PLFP| Fee payment|Year of fee payment: 3 |
    2018-04-18| PLFP| Fee payment|Year of fee payment: 4 |
    2019-04-29| PLFP| Fee payment|Year of fee payment: 5 |
    2021-01-15| ST| Notification of lapse|Effective date: 20201209 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1552997|2015-04-08|
    FR1552997A|FR3034929B1|2015-04-08|2015-04-08|ACTIVE FILTRATION SYSTEM|FR1552997A| FR3034929B1|2015-04-08|2015-04-08|ACTIVE FILTRATION SYSTEM|
    ES16159216.7T| ES2673613T3|2015-04-08|2016-03-08|Active filtering system|
    EP16159216.7A| EP3079258B1|2015-04-08|2016-03-08|Active filtering system|
    US15/076,700| US9537467B2|2015-04-08|2016-03-22|Active filtering system|
    CN201610204859.3A| CN106059272B|2015-04-08|2016-04-05|Active filtration system|
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