EP2507904A1 - Procédé et système pour régler un convertisseur à circuit intermédiaire de tension - Google Patents

Procédé et système pour régler un convertisseur à circuit intermédiaire de tension

Info

Publication number
EP2507904A1
EP2507904A1 EP09771543A EP09771543A EP2507904A1 EP 2507904 A1 EP2507904 A1 EP 2507904A1 EP 09771543 A EP09771543 A EP 09771543A EP 09771543 A EP09771543 A EP 09771543A EP 2507904 A1 EP2507904 A1 EP 2507904A1
Authority
EP
European Patent Office
Prior art keywords
voltage
input
converter
current
value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09771543A
Other languages
German (de)
English (en)
Inventor
Mike Dommaschk
Ingo Euler
Jörg LANG
Klaus WÜRFLINGER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP2507904A1 publication Critical patent/EP2507904A1/fr
Withdrawn legal-status Critical Current

Links

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
    • 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

Definitions

  • the invention has for its object to propose a method with which a voltage intermediate circuit converter can operate particularly safe.
  • the invention provides a method for controlling achrosnik Vietnamese silkbobiverters, in which a voltage-related control difference ⁇ size is formed from a setpoint of the DC voltage and the actual value of the DC voltage at the DC input ofcloszwi- schen Vietnamesekonverters, the voltage-related crizeldifferenzgrö ⁇ SSE a voltage control stage with limiter property ⁇ out clearly an authorized maximum and minimum values of the DC current at the DC voltage input of thepalszwi- is supplied to the converter intermediate circuit, a current-related from ⁇ output variable of the voltage regulator circuit with the actual value of
  • Direct current at the DC input of the intermediate voltage converter to form a current-related Re- is compared with respect to a permitted maximum and minimum value of the DC voltage at the DC input of the DC link converter and a voltage-related output of the current control stage as
  • An essential advantage of the method according to the invention is that, because of the combined use of a
  • Voltage control stage with downstream power control stage not only a voltage limit incipients surgebaukonver- ter both up and down to protect the located in the voltage intermediate converter electrical systems, but also a current limit to protect theistswanffyver- converter and located in the voltage ⁇ intermediate circuit electrical systems is achieved.
  • a stable and safe operation of the voltage intermediate circuit converter is given at the limits defined by the maximum and minimum current and voltage values in the case of, for example, load shedding, network faults and transient mains-side overvoltages.
  • the limitation can take any form and change through functional relationships.
  • the limitation of the direct current at the input of the voltage intermediate circuit converter has the highest priority in the method according to the invention for the purpose of protecting the voltage intermediate circuit converter.
  • This embodiment is particularly advantageous insofar as it ensures that the method according to the invention is not operated at DC voltages which deviate too much from the nominal voltage.
  • the input control difference quantity can be processed differently in the pre-rule stage; be advantageous, it is considered, when the input control difference size egg nem input controller is supplied usually precursor of ⁇ sen output as a DC voltage difference value among Ge ⁇ winnung a DC voltage command intermediate value with the actual ⁇ value of the DC voltage at the voltage input of the voltage intermediate circuit converter is compared; it is also the DC voltage command intermediate value compared with the nominal value of the DC voltage at the voltage input of the voltage intermediate circuit converter to form an input to a limiter stage with permitted maximum and minimum deviation from the nominal value of the DC voltage at the input of the voltage intermediate-circuit converter, and the off ⁇ output variable of the limiter as the output the Regelvor ⁇ level is used.
  • the overall control is made with the goal that a value zero is set at the output of the control pre-stage.
  • the output of the control pre-stage can be further treated in various ways.
  • a limited value of the actual value of the direct current at the DC voltage input of the voltage intermediate circuit converter is advantageously taken into account in the formation of the input variable for the limiting device.
  • the current control stage can be constructed in different ways and therefore can also be done in various ways, the processing of the current-related control difference variable in this control stage; advantageous if the strombezo ⁇ gene control difference size of the power control stage of an input ⁇ control arrangement the current regulation stage is supplied to paint the voltage-related output to obtain a A ⁇ input variable for a limiter with approved maximum and minimum value of the DC voltage at the input of the voltage intermediate circuit converter to the actual value is of equal ⁇ voltage is added to the DC voltage input of the voltage-source converter circuit, wherein the output of the limiter forms the control voltage of the voltage-source converter circuit.
  • a limited value of the actual value of the DC voltage at the DC voltage is advantageously obtained. voltage input of the voltage link converter into account ⁇ Untitled.
  • the invention is also based on the object, an arrangement for regulating aponsnikikaver- converter, with which a voltage source converter can operate particularly safe.
  • the invention provides a voltage regulation stage with a limiter feature with regard to an allowed maximum and minimum value of the DC current at the DC input of the DC link converter, which is used to form its voltage-related control differential variable with a nominal value and an actual value of the DC voltage at the DC voltage input - Circular converter is acted upon;
  • the voltage control stage is followed by a current control stage, the input side has a summing, which is acted upon by a current-related output of the voltage regulation stage and the actual value of the DC at the DC voltage input of theistszwi- schennikkonverters and the output forms a current-related control difference variable;
  • the current control stage outputs on the output side a voltage-related output variable as a control voltage for the voltage source converter.
  • the voltage regulator circuit a crizungsvor ⁇ stage with limiter property in terms of a Prohibited NEN maximum and minimum deviation of the DC voltage at the DC voltage input of the voltage source converter upstream of their nominal value, the input side via a first summing circuit with setpoint and actual values at the DC voltage input of theistsnik Vietnamesekonverters beauf ⁇ beat.
  • the current and / or voltage-dependent desired and actual values on the DC voltage side of the voltage intermediate circuit converter are also advantageously power values.
  • the control pre-stage can be structured differently; It is considered advantageous if the control pre-stage has an input controller, which is followed by a second Summierschal ⁇ tion in which the output of the input ⁇ controller as a DC differential value to obtain ei ⁇ nes DC desired intermediate value with the actual value of the DC voltage at the DC voltage input Voltage swing converter is compared; The second summing circuit is followed by a third summing circuit, in which the DC desired intermediate value with the desired value of the DC voltage at the input of thepuls strongly Vietnamese value is compared; From the ⁇ gear of the limiter forms the output of the control precursor.
  • the second summing circuit beauf strike with the actual value of the DC voltage at the voltage input of the voltage intermediate circuit converter via a limiter ⁇ .
  • the voltage control stage contains an input control stage, which is acted upon on the input side with the voltage-related control difference quantity and the output side is connected to a summing device
  • the summing device is the input side with the actual value of the DC current at the DC voltage input of the DC link converter for forming an input variable for a limiting device with permitted maximum and minimum value of the DC current applied to the DC input of thepulsnik Vietnamese- verters.
  • the current control stage can also be designed differently; advantageously it appears when the current regulation stage includes an input control device, which input side is acted upon by the current-related deviation size and is connected from ⁇ output side to a second summing device; the second summing input side is acted upon with the actual value of the DC voltage at the voltage input of the voltage intermediate circuit converter to form an input ⁇ size for a limiter with the recommended maximum and minimum value of the DC voltage at the voltage input of the voltage intermediate circuit converter.
  • ⁇ when it is advantageous when a limiter circuit is connected to an intermediate circuit converter with the actual value of the direct voltage at the direct voltage input of thepalszwi- acted upon input of the second summing device.
  • FIG. 2 shows an arrangement for regulating a voltage intermediate converter according to the invention in its basic form, in FIG
  • Fig. 3 is an extended by a control precursor arrangement according to Figure 2 according to the invention, in
  • FIG. 4 is a detailed representation of the control precursor with external circuitry, in FIG.
  • Fig. 5 is a detailed structure of a voltage and a
  • FIG. 1 shows a voltage intermediate converter K in which a direct current i dcp flows on one side via a direct current line El and an input Ein1.
  • the current i dCpn flows via the DC line E2 and a further input EIN2 of the voltage intermediate converter K;
  • Inputs IN1 and IN2 form a DC input ON1 / 2.
  • Opposite ground M is the DC voltage line El at a voltage u dcp and at the DC voltage line E2 the voltage Uci cri ;
  • EIN1 and EIN2 of the voltage intermediate converter K is a DC voltage Ud, which, taking into account the signs from the sum of the two voltages Uci cp and Uci cri results.
  • an alternating current network W is connected to the voltage intermediate circuit converter K into which over the three lines currents il, i2 and i3 flow, wherein against ⁇ M to ground voltages ul, u2 and u3 are present.
  • the arrangement shown in FIG. 2 for regulating the voltage intermediate-circuit converter K shown in FIG. 1 consists essentially of a voltage regulation stage RU and a downstream current regulation stage RI.
  • the voltage control ⁇ stage RU is a summing circuit S is arranged upstream, with a setpoint value w of a ⁇ part UD of the direct voltage Ud at the inputs transitions EINL and IN2 of the voltage intermediate circuit converter K and on the other hand, acted upon by the actual value x uc i this direct voltage Ud in such a manner is that a difference takes place.
  • the direct currents idmax and idmin are maximum and minimum values of a direct current i dC , which consists of the direct currents i (j Cp and i dcn according to the following relation: dcp ⁇
  • a current-related output w 'i d which is supplied to a sum minimizing ⁇ arrangement SUA formed.
  • the summing arrangement SUA is also acted upon by the actual value xi d of the direct current i dC at the input of the voltage intermediate converter K and forms a difference of the current values supplied to it, resulting in a current-related control difference quantity e "i i d .
  • the current control stage RI is acted upon, which preferably contains a PID controller.
  • This controller has a limiter characteristic so far as it voltage intermediate circuit of the converter with respect to a K value len maxima ⁇ u d max and a minimum value limits the direct voltage Ud Udmin at the input an L / 2.
  • a stress-related output variable w is then obtained '' ud, which is used as a control voltage of the voltage source converters K, which may act -based example, a VSC (Voltage Source Converter) converters by the way.
  • the control voltage w '' ud ensures that the voltage source converter K experiences a voltage limitation both upwards and downwards and is current-limited. A stable and safe operation of the voltage intermediate converter K is thus achieved.
  • FIG. 3 The arrangement shown in Figure 3 for controlling the voltage intermediate circuit converter according to Figure 1 K is consistent respect ⁇ Lich the voltage regulator circuit and the downstream RU RI current regulation stage having the above arrangement to Figure 2.
  • the arrangement according to FIG. 2 is supplemented on the input side by a control precursor RV.
  • a control precursor RV On the input side of the control precursor RV is preceded by a summing unit SUE, which is acted upon in the illustrated embodiment on the one hand with a desired value w pd of the active power and the actual value x pd this Leis ⁇ tion so that a difference between these two values in the form of an input control difference quantity e ' wd forms. This is taking into account one by means of
  • the device operates according to Figure 3 with respect to the voltage regulator circuit RU and the current regulation stage RI in ⁇ the same way as already described in conjunction with Figure 2 in detail, so that here again the setting voltage w '' ud for the voltage source converters K arises at the output of the current control stage RI.
  • FIG. 4 shows the control precursor RV in a preferred embodiment.
  • the input control difference quantity e pd (see also FIG. 3) is supplied to an input controller EIRV, which may be a P controller.
  • EIRV an input controller
  • the output of this controller which is a DC voltage difference value Aw 'ud, applied a summing circuit SU1, which is also x ud applied via a limiter BV with a limited actual value x udb of Gleichwoodsistwerts and difference ⁇ forming a DC Set intermediate value w '' ud forms.
  • This value w '' ud is then minimizing circuit in a further sum processed SU2, w with the set value UD of the direct voltage U D at the input IN1 / 2 of the chip is acted upon voltage intermediate circuit converter K and forms a Sum ⁇ me of its two input variables ,
  • the further summing circuit SU2 is followed by a limiter stage BS, which ensures that a limitation of
  • FIG. 5 shows a preferred embodiment of the voltage regulation stage RU and of the current regulation stage RI according to FIG. 3. It can be seen that the voltage regulation stage RU has an input regulation stage EIRU in which it can be a P regulator.
  • the input control level EIRU is followed by a summing device SE, in which a value x db of the actual value of the direct current i d at the input of the voltage intermediate circuit converter K is added to the output variable Awi d of the input control level EIRU.
  • w '''i d represents ei ⁇ ne input to a downstream limiter means BE, with a maximum and a minimum value idmax and is allowed dmin of the DC current i d at the input ofreciszwi- intermediate circuit converter K.
  • the output variable w ' id of the voltage regulation stage RU is fed to the summing arrangement SUA (see also FIG. from which the current-related control difference quantity e " d is formed, which is further processed in an input control arrangement EIRI of the current control stage RI, wherein the input control arrangement EIRI is preferably formed by a PID controller.
  • the off ⁇ input variable Aw '' Ud of the input control arrangement EIRI is formed together with a limited by a limiter BI actual value of the direct voltage Ud at the input an L / 2 of the voltage intermediate circuit converter K in a downstream, two ⁇ th summing SA to give an input value wuci2.
  • This size w ud 2 becomes a limiter arrangement BA, which ensures that maximum and minimum values udmax and udmin of the DC voltage U d at the input of the voltage source converter are not exceeded.
  • the output w '' ud the Begrenzeranowski angle BA then forms the control voltage for the voltage intermediate circuit converter K.
  • FIG. 6 to illustrate the control behavior which can be achieved with the arrangement according to the invention, the direct current i d at the input IN1 / 2 of the voltage intermediate converter K is shown across the DC voltage U d at the same input. It can be seen that with respect to the direct current i d a maximum value imax is not exceeded or a minimum value imin is not undershot; The same applies to the DC voltage U d , which moves in a range between a minimum DC voltage umin and a maximum voltage umax. Located Ar is a ⁇ beitsddling A, which extends through a desired value wi d the direct current id and a target value w UD of the direct voltage U d is obtained.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

L'invention concerne un procédé pour régler un convertisseur à circuit intermédiaire de tension (K). Pour pouvoir faire fonctionner de manière particulièrement sûre un tel convertisseur à circuit intermédiaire de tension (K), une grandeur de différence de réglage (e'ud) rapportée à la tension est formée à partir d'une valeur de consigne (wud) de la tension continue (ud) et de la valeur effective (wud) de la tension continue (ud) à l'entrée de tension continue (EIN1/2) du convertisseur à circuit intermédiaire de tension (K) et est fournie à un étage de réglage de tension (RU) avec propriété de limitation en ce qui concerne une valeur maximale et minimale admissible (idmax, idmin) du courant continu à l'entrée de tension continue (EIN1/2) du convertisseur à circuit intermédiaire de tension (K). Une grandeur de sortie (w'id) rapportée au courant de l'étage de réglage de tension (RU) est comparée avec la valeur effective (xid) du courant continu à l'entrée de tension continue (EIN1/2) du convertisseur à circuit intermédiaire de tension (K) en formant une grandeur de différence de réglage (e''id) rapportée au courant pour un étage de réglage de courant (RI) avec propriété de limitation en ce qui concerne une valeur maximale et minimale admissible (udmax, udmin) de la tension continue (ud) à l'entrée de tension continue (EIN1/2) du convertisseur à circuit intermédiaire de tension (K) et une valeur de sortie (w''ud) rapportée à la tension de l'étage de réglage de courant (RI) est utilisée comme tension de commande pour le convertisseur à circuit intermédiaire de tension (K). L'invention concerne également un système pour régler un convertisseur à circuit intermédiaire de tension (K).
EP09771543A 2009-12-03 2009-12-03 Procédé et système pour régler un convertisseur à circuit intermédiaire de tension Withdrawn EP2507904A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2009/066352 WO2011066860A1 (fr) 2009-12-03 2009-12-03 Procédé et système pour régler un convertisseur à circuit intermédiaire de tension

Publications (1)

Publication Number Publication Date
EP2507904A1 true EP2507904A1 (fr) 2012-10-10

Family

ID=43242902

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09771543A Withdrawn EP2507904A1 (fr) 2009-12-03 2009-12-03 Procédé et système pour régler un convertisseur à circuit intermédiaire de tension

Country Status (2)

Country Link
EP (1) EP2507904A1 (fr)
WO (1) WO2011066860A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3311214B2 (ja) * 1995-09-05 2002-08-05 東京電力株式会社 電力変換装置の制御装置
US7269039B2 (en) * 2005-08-19 2007-09-11 Honeywell International Inc. Method and device for producing rectifier gating signals using feed forward control
US7733677B2 (en) * 2007-10-11 2010-06-08 Honeywell International Inc. Output power switching vector scaling system and method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2011066860A1 *

Also Published As

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