EP2962386A1 - Device for controlling and balancing currents for dc/dc converters - Google Patents

Device for controlling and balancing currents for dc/dc converters

Info

Publication number
EP2962386A1
EP2962386A1 EP14708225.9A EP14708225A EP2962386A1 EP 2962386 A1 EP2962386 A1 EP 2962386A1 EP 14708225 A EP14708225 A EP 14708225A EP 2962386 A1 EP2962386 A1 EP 2962386A1
Authority
EP
European Patent Office
Prior art keywords
current
converters
output
currents
current sensors
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Withdrawn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
EP14708225.9A
Other languages
German (de)
French (fr)
Inventor
Guillermo Garcia Soto
Olivier TARRADE
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.)
General Electric Technology GmbH
Original Assignee
Alstom Technology 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 Alstom Technology AG filed Critical Alstom Technology AG
Publication of EP2962386A1 publication Critical patent/EP2962386A1/en
Withdrawn legal-status Critical Current

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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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac 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
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac 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
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • 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
    • 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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac 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
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac 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
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
    • 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
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0009—Devices or circuits for detecting current in a converter
    • 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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac 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
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac 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
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
    • H02M3/1586—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel switched with a phase shift, i.e. interleaved

Definitions

  • the invention relates to a control device for regulating and balancing currents for DC / DC converters, particularly in the field of energy storage, for example for charging and discharging batteries.
  • FIG. 1 illustrates a high power DC / DC converter of the prior art comprising n arms each formed of two semiconductor components arranged in series.
  • Each semiconductor component comprises a transistor T 1, for example an insulated gate bipolar transistor ("insulated gate Bipolar transistor" or IGBT) in parallel with a diode Di.
  • the converter is disposed between a storage assembly 11, for example a battery, and a charging voltage source R, the midpoint of each arm, which corresponds to a phase i of the current, being connected to this source of charge voltage. R by means of a smoothing inductance, L1, L2 ... Ln.
  • This converter also comprises a control chain composed of PIDi and PWMi blocks for each current phase i, the current Ii * representing a current setpoint.
  • a PID block illustrated in FIG. 2, is used to regulate a value, that is to say to force a system to follow a given instruction, by performing a closed-loop servocontrol. This monitors the value to be regulated, it is compared to the given instruction, and the difference between them is measured. An output signal is then generated which is proportional to this difference. But this proportional gain is not enough, because the setpoint can be exceeded because of the inertia of the system. Thus, to predict the behavior of the system, the output value is integrated. If the setpoint is exceeded, the integrator forces the system to adapt the output. In addition, this integral gain is not enough, we monitor the slope (derivative) to verify that we do not exceed the setpoint, and in this case, make a correction.
  • a PWM block uses a PWM pulse width modulation, which consists of introducing additional switches at a frequency higher than the fundamental frequency, transforming a voltage into a sequence of slots of fixed amplitude and variable width, a PWM command is performed by comparing a modulating wave low frequency 20 to a wave high frequency carrier 21 of triangular shape, as shown in Figure 3.
  • the pulses S thus generated serve as commands for the switching of the transistors Ti.
  • control chain for each phase of current to be regulated requires a duplication of the control chain as many times as necessary, which leads to a high consumption of resources.
  • FPGA Field Programmable Gate Array
  • programmable logic networks this results in a greater number of logic gates.
  • the invention relates to a device for regulating and balancing currents for DC / DC converters, between a first and a second voltage source, this device comprising:
  • a divider 1 / n receiving the current coming from the summator and delivering a mean current
  • a PWM block receiving the outputs of these summers and delivering n interleaved channels.
  • a regulated average current from the n arms is used.
  • FIG. 1 illustrates a device of the prior art.
  • Figure 2 illustrates a PID block
  • Figure 3 illustrates the operation of a PWM block.
  • FIGS 4 and 5 illustrate the features of the device of the invention.
  • FIGS 6 and 6A illustrate an embodiment of the device of the invention.
  • the device for regulating and balancing the currents for DC / DC converters of the invention illustrated in FIGS. 4 and 5, comprises:
  • step-up (C1, C2 ... Cn) converters connected at input to a voltage source 11 delivering or absorbing energy
  • n inductors L1, L2 ... Ln connected at the input to the output of each of these converters C1, C2 ... Cn, and at the output to a source of charge voltage R delivering or absorbing energy, through of n connections and a summator 12, n current sensors 22 arranged on each of these links,
  • a regulation chain 18 comprising:
  • a divider 1 / n 25 receiving the current from this summator and delivering a mean current
  • a PWM block receiving the outputs of these n summers and delivering n interleaved channels.
  • the average value of the sum of the currents leaving the DC / DC conversion device is regulated, which requires only a single control chain.
  • the balancing of the currents of the n converters of this DC / DC conversion device is done by measuring these outgoing currents and comparing them with the average value (divided by n). Thus the difference obtained is added, via a proportional gain, to the control of the regulation of the average value.
  • This device makes it possible to use only one control chain and to ensure the balancing of the currents.
  • Figures 6 and 6A illustrate a solution tested on a 500 kW demonstrator of energy storage with Li-ion batteries and NaS batteries.
  • the architecture used corresponds to a basic structure comprising a DC / DC converter 30 and a DC / AC converter 31 located between the battery 32 and the AC network 33, three-phase windings 34 and 35 being arranged at the input and at the output, a capacity being arranged between a DC / DC converter and a DC / AC converter.
  • the curves 36 illustrate the currents of two of the three DC / DC converters, and the curve 37 the total current.

Abstract

The invention relates to a device for controlling and balancing currents for DC/DC converters, between a first and a second voltage source, which includes: n converters (C1, C2...Cn) which are connected in parallel to the first voltage source (11); n inductors (L1, L2...Ln) which are connected at the output to the second voltage source (R) through n connections; n current sensors (22) which are arranged on each one of said connections; and a single control chain connected at the input to said n current sensors (23) and at the output to said n converters (C1, C2...Cn).

Description

DISPOSITIF DE REGULATION ET EQUILIBRAGE DES COURANTS POUR DES CONVERTISSEURS DC/DC  CURRENT REGULATION AND BALANCING DEVICE FOR DC / DC CONVERTERS
DESCRIPTION DESCRIPTION
DOMAINE TECHNIQUE TECHNICAL AREA
L'invention concerne un dispositif de contrôle pour régulation et équilibrage des courants pour des convertisseurs DC/DC, notamment dans le domaine du stockage d'énergie, par exemple pour charger et décharger des batteries. The invention relates to a control device for regulating and balancing currents for DC / DC converters, particularly in the field of energy storage, for example for charging and discharging batteries.
ETAT DE LA TECHNIQUE ANTERIEURE STATE OF THE PRIOR ART
La figure 1 illustre un convertisseur DC/DC de forte puissance de l'art antérieur comprenant n bras formé chacun de deux composants semi-conducteurs disposés en série. Chaque composant semi-conducteur comprend un transistor Ti, par exemple un transistor bipolaire à grille isolée (« Insulated Gâte Bipolar transistor » ou IGBT) en parallèle avec une diode Di . Le convertisseur est disposé entre un ensemble de stockage 11, par exemple une batterie, et une source de tension de charge R, le point milieu de chaque bras, qui correspond à une phase i du courant, étant relié à cette source de tension de charge R au moyen d'une inductance de lissage, Ll, L2...Ln. Ce convertisseur comprend également une chaîne de régulation composée de blocs PIDi et PWMi pour chaque phase de courant i, le courant Ii* représentant une consigne de courant. FIG. 1 illustrates a high power DC / DC converter of the prior art comprising n arms each formed of two semiconductor components arranged in series. Each semiconductor component comprises a transistor T 1, for example an insulated gate bipolar transistor ("insulated gate Bipolar transistor" or IGBT) in parallel with a diode Di. The converter is disposed between a storage assembly 11, for example a battery, and a charging voltage source R, the midpoint of each arm, which corresponds to a phase i of the current, being connected to this source of charge voltage. R by means of a smoothing inductance, L1, L2 ... Ln. This converter also comprises a control chain composed of PIDi and PWMi blocks for each current phase i, the current Ii * representing a current setpoint.
Une chaîne de régulation PIDi + PWMi est décrite ci-après. Bloc PID A control chain PIDi + PWMi is described below. PID block
Un bloc PID, illustré sur la figure 2, sert à réguler une valeur, c'est-à-dire obliger un système à suivre une consigne donnée, en réalisant un asservissement en boucle fermé. On surveille ainsi la valeur à réguler, on la compare a la consigne donnée, et on mesure la différence entre celles-ci. On génère ensuite un signal de sortie qui est proportionnel à cette différence. Mais ce gain proportionnel n'est pas suffisant, car la valeur de consigne peut être dépassée à cause de l'inertie du système. Ainsi, pour prévoir le comportement du système, on intègre la valeur de sortie. Si la valeur de consigne est dépassée, l'intégrateur oblige le système à adapter la sortie. De plus ce gain intégral ne suffisant pas, on surveille la pente (dérivée) pour vérifier que l'on ne dépasse pas la consigne, et, dans ce cas, réaliser une correction.  A PID block, illustrated in FIG. 2, is used to regulate a value, that is to say to force a system to follow a given instruction, by performing a closed-loop servocontrol. This monitors the value to be regulated, it is compared to the given instruction, and the difference between them is measured. An output signal is then generated which is proportional to this difference. But this proportional gain is not enough, because the setpoint can be exceeded because of the inertia of the system. Thus, to predict the behavior of the system, the output value is integrated. If the setpoint is exceeded, the integrator forces the system to adapt the output. In addition, this integral gain is not enough, we monitor the slope (derivative) to verify that we do not exceed the setpoint, and in this case, make a correction.
L'ensemble de ces techniques de régulation constitue un correcteur PID (Proportionnel Intégrale Dérivée) . Ainsi, la fonction de transfert en transformée de Laplace d'un régulateur PID parallèle est la somme de trois actions :  All of these regulation techniques constitute a PID (Proportional Integral Derivative) corrector. Thus, the Laplace transform transfer function of a parallel PID regulator is the sum of three actions:
C (p) =G + -.- + Td.p  C (p) = G + -.- + Td.p
Γϊ p  Γϊ p
Bloc PWM  PWM block
Un bloc PWM utilise une modulation de largeur d'impulsion MLI, qui consiste à introduire des commutations supplémentaires à fréquence plus élevées que la fréquence fondamentale, transformant une tension en une suite de créneaux d'amplitude fixe et de largeur variable, une commande MLI est réalisée par comparaison d'une onde modulante basse fréquence 20 à une onde porteuse haute fréquence 21 de forme triangulaire, comme illustré sur la figure 3. Les impulsions S ainsi générées servent de commandes pour la commutation des transistors Ti. A PWM block uses a PWM pulse width modulation, which consists of introducing additional switches at a frequency higher than the fundamental frequency, transforming a voltage into a sequence of slots of fixed amplitude and variable width, a PWM command is performed by comparing a modulating wave low frequency 20 to a wave high frequency carrier 21 of triangular shape, as shown in Figure 3. The pulses S thus generated serve as commands for the switching of the transistors Ti.
L'utilisation d'une chaîne de régulation pour chaque phase de courant à réguler nécessite une duplication de la chaîne de régulation autant de fois que nécessaire, ce qui entraîne une grande consommation des ressources. Dans le cas d'une réalisation avec des circuits FPGA (« Field Programmable Gâte Array » ou réseaux logiques programmables) cela se traduit par un plus grand nombre de portes logiques.  The use of a control chain for each phase of current to be regulated requires a duplication of the control chain as many times as necessary, which leads to a high consumption of resources. In the case of an implementation with FPGA ("Field Programmable Gate Array" or programmable logic networks) this results in a greater number of logic gates.
Pour résoudre ce problème technique l'invention propose un dispositif de régulation et équilibrage des courants pour n convertisseurs DC/DC utilisant une seule chaîne de régulation, avec des courants équilibrés, comme illustré sur la figure 4, tels que : I = Il + 12 + ...In et II = 12 =...In  To solve this technical problem the invention proposes a device for regulating and balancing the currents for n DC / DC converters using a single control chain, with balanced currents, as illustrated in FIG. 4, such that: I = II + 12 + ... In and II = 12 = ... In
EXPOSÉ DE L' INVENTION STATEMENT OF THE INVENTION
L' invention concerne un dispositif de régulation et équilibrage des courants pour des convertisseurs DC/DC, entre une première et une seconde sources de tension, ce dispositif comprenant : The invention relates to a device for regulating and balancing currents for DC / DC converters, between a first and a second voltage source, this device comprising:
- n convertisseurs reliés en parallèle à la première source de tension,  - n converters connected in parallel with the first voltage source,
n inductances reliées en sortie à la seconde source de tension au travers de n liaisons,  n inductances connected at the output to the second voltage source through n connections,
n capteurs de courant disposés sur chacune de ces liaisons, - une seule chaîne de régulation reliée en entrée à ces n capteurs de courant et en sortie à ces n convertisseurs , n current sensors arranged on each of these links, a single control chain connected at input to these n current sensors and at the output to these n converters,
caractérisé en ce que la chaîne de régulation comprend : characterized in that the control chain comprises:
un sommateur des courants issus des capteurs de courant,  a summator of the currents coming from the current sensors,
- un bloc PID recevant le courant issu du sommateur,  a PID block receiving the current from the summator,
- un diviseur 1/n recevant le courant issu du sommateur et délivrant un courant moyen,  a divider 1 / n receiving the current coming from the summator and delivering a mean current,
- n comparateurs entre les courants mesurés par les capteurs de courant et le courant moyen,  n comparators between the currents measured by the current sensors and the average current,
n éléments de gains proportionnels disposés en sortie de ces comparateurs,  n proportional gains elements arranged at the output of these comparators,
n sommateurs des sorties de ces n éléments et de la sortie du bloc PID,  n summaries of the outputs of these n elements and the output of the PID block,
- un bloc PWM recevant les sorties de ces n sommateurs et délivrant n canaux entrelacés.  a PWM block receiving the outputs of these summers and delivering n interleaved channels.
Le dispositif de l'invention présente les avantages suivants :  The device of the invention has the following advantages:
on utilise un courant moyen régulé provenant des n bras.  a regulated average current from the n arms is used.
on réalise un équilibrage des courants des n bras.  a balancing of the currents of the n arms is carried out.
on utilise une seule chaîne de régulation .  only one control chain is used.
- on obtient un équilibrage rapide du fait de la contribution de correction proportionnelle.  - a fast balancing is achieved due to the proportional correction contribution.
- on utilise des capteurs de courants à calibre n fois inférieure à celui du courant moyen. - Les temps d'exécution sont faibles et les ressources FPGA sont minimes. current sensors are used which are n times smaller than the average current. - Runtimes are low and FPGA resources are minimal.
BRÈVE DESCRIPTION DES DESSINS La figure 1 illustre un dispositif de l'art connu . BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates a device of the prior art.
La figure 2 illustre un bloc PID.  Figure 2 illustrates a PID block.
La figure 3 illustre le fonctionnement d'un bloc PWM.  Figure 3 illustrates the operation of a PWM block.
Les figures 4 et 5 illustrent les caractéristiques du dispositif de l'invention.  Figures 4 and 5 illustrate the features of the device of the invention.
Les figures 6 et 6A illustrent un mode de réalisation du dispositif de l'invention.  Figures 6 and 6A illustrate an embodiment of the device of the invention.
EXPOSÉ DÉTAILLÉ DE MODES DE RÉALISATION PARTICULIERS DETAILED PRESENTATION OF PARTICULAR EMBODIMENTS
Dans la suite de la description, des éléments analogues entre eux sont représentés avec la même référence. In the remainder of the description, elements similar to each other are represented with the same reference.
Le dispositif de régulation et équilibrage des courants pour des convertisseurs DC/DC de l'invention, illustré sur les figures 4 et 5, comprend :  The device for regulating and balancing the currents for DC / DC converters of the invention, illustrated in FIGS. 4 and 5, comprises:
n convertisseurs (Cl,C2...Cn) élévateur- abaisseur reliés en entrée à une source de tension 11 délivrant ou absorbant de l'énergie,  n step-up (C1, C2 ... Cn) converters connected at input to a voltage source 11 delivering or absorbing energy,
n inductances Ll, L2...Ln, reliées en entrée à la sortie de chacun de ces convertisseurs Cl, C2...Cn, et en sortie à une source de tension de charge R délivrant ou absorbant de l'énergie, au travers de n liaisons et d'un sommateur 12, n capteurs de courant 22 disposés sur chacune de ces liaisons, n inductors L1, L2 ... Ln, connected at the input to the output of each of these converters C1, C2 ... Cn, and at the output to a source of charge voltage R delivering or absorbing energy, through of n connections and a summator 12, n current sensors 22 arranged on each of these links,
- une chaîne de régulation 18 comprenant : a regulation chain 18 comprising:
• un sommateur 24 des courants issus des capteurs de courant 22, An adder 24 of the currents coming from the current sensors 22,
• un bloc PID disposé en sortie de ce sommateur,  A PID block disposed at the output of this summator,
• un diviseur 1/n 25 recevant le courant issu de ce sommateur et délivrant un courant moyen,  A divider 1 / n 25 receiving the current from this summator and delivering a mean current,
• n comparateurs 26 entre les courants mesurés par les capteurs de courant 22 et le courant moyen,  N comparators 26 between the currents measured by the current sensors 22 and the average current,
• n éléments 23 de gains proportionnels disposés en sortie de ces n comparateurs ,  N proportional gain elements 23 disposed at the output of these n comparators,
• n sommateurs 27 des sorties de ces n éléments et de la sortie du bloc PID,  • n summaries 27 of the outputs of these n elements and the output of the PID block,
• Un bloc PWM recevant les sorties de ces n sommateurs et délivrant n canaux entrelacés.  • A PWM block receiving the outputs of these n summers and delivering n interleaved channels.
Dans le dispositif de l'invention, on régule la valeur moyenne de la somme des courants sortant du dispositif de conversion DC/DC, ce qui ne nécessite qu'une seule chaîne de régulation. L'équilibrage des courants des n convertisseurs de ce dispositif de conversion DC/DC se fait en mesurant ces courants sortant et en les comparant à la valeur moyenne (divisée par n) . Ainsi l'écart obtenu est ajouté, via un gain proportionnel, à la commande de la régulation de la valeur moyenne. Ce dispositif permet de n'utiliser qu'une seule chaîne de régulation et de s'assurer de l'équilibrage des courants. In the device of the invention, the average value of the sum of the currents leaving the DC / DC conversion device is regulated, which requires only a single control chain. The balancing of the currents of the n converters of this DC / DC conversion device is done by measuring these outgoing currents and comparing them with the average value (divided by n). Thus the difference obtained is added, via a proportional gain, to the control of the regulation of the average value. This device makes it possible to use only one control chain and to ensure the balancing of the currents.
Les figures 6 et 6A illustrent une solution testée sur un démonstrateur 500 kW de stockage d'énergie avec des batteries Li-ion et des batteries NaS . L'architecture utilisée correspond à une structure de base comprenant un convertisseur DC/DC 30 et un convertisseur DC/AC 31 situés entre la batterie 32 et le réseau AC 33, des enroulements triphasés 34 et 35 étant disposés en entrée et en sortie, une capacité étant disposée entre un convertisseur DC/DC et un convertisseur DC/AC. Les courbes 36 illustrent les courants de deux des trois convertisseurs DC/DC, et la courbe 37 le courant total.  Figures 6 and 6A illustrate a solution tested on a 500 kW demonstrator of energy storage with Li-ion batteries and NaS batteries. The architecture used corresponds to a basic structure comprising a DC / DC converter 30 and a DC / AC converter 31 located between the battery 32 and the AC network 33, three-phase windings 34 and 35 being arranged at the input and at the output, a capacity being arranged between a DC / DC converter and a DC / AC converter. The curves 36 illustrate the currents of two of the three DC / DC converters, and the curve 37 the total current.

Claims

REVENDICATIONS
1. Dispositif de régulation et équilibrage des courants pour des convertisseurs DC/DC entre une première et une seconde sources de tension, ce dispositif comprenant : A current regulating and balancing device for DC / DC converters between first and second voltage sources, said device comprising:
n convertisseurs (Cl, C2...Cn) reliés en parallèle à la première source de tension (11),  n converters (C1, C2 ... Cn) connected in parallel with the first voltage source (11),
n inductances (Ll, L2...Ln) , reliées en sortie à la seconde source de tension (R) au travers de n liaisons,  n inductances (L1, L2 ... Ln), connected at the output to the second voltage source (R) through n connections,
- n capteurs de courant (22) disposés sur chacune de ces liaisons,  n current sensors (22) arranged on each of these links,
- une seule chaîne de régulation reliée en entrée à ces n capteurs de courant (23) et en sortie à ces n convertisseurs (Cl, C2...Cn) ,  a single control chain connected in input to these n current sensors (23) and in output to these n converters (C1, C2 ... Cn),
caractérisé en ce que la chaîne de régulation (28) comprend : characterized in that the control chain (28) comprises:
- un sommateur (24) des courants issus des capteurs de courant (22),  an adder (24) of the currents coming from the current sensors (22),
- un bloc PID recevant le courant issu de ce sommateur (24),  a PID block receiving the current from this summator (24),
- un diviseur 1/n recevant le courant issu du sommateur et délivrant un courant moyen, a divider 1 / n receiving the current coming from the summator and delivering a mean current,
n comparateurs (26) entre les courants mesurés par les capteurs de courant (22) et le courant moyen,  n comparators (26) between the currents measured by the current sensors (22) and the average current,
- n éléments (23) de gains proportionnels disposés en sortie de ces comparateurs, - n sommateurs (27) des sorties de ces n éléments et de la sortie du bloc PID, n proportional gain elements (23) arranged at the output of these comparators, n summators (27) of the outputs of these n elements and of the output of the PID block,
- un bloc PWM recevant les sorties de ces n sommateurs et délivrant n canaux entrelacés.  a PWM block receiving the outputs of these summers and delivering n interleaved channels.
EP14708225.9A 2013-02-28 2014-02-25 Device for controlling and balancing currents for dc/dc converters Withdrawn EP2962386A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1351802A FR3002706B1 (en) 2013-02-28 2013-02-28 CURRENT REGULATION AND BALANCING DEVICE FOR DC / DC CONVERTERS
PCT/EP2014/053647 WO2014131766A1 (en) 2013-02-28 2014-02-25 Device for controlling and balancing currents for dc/dc converters

Publications (1)

Publication Number Publication Date
EP2962386A1 true EP2962386A1 (en) 2016-01-06

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EP14708225.9A Withdrawn EP2962386A1 (en) 2013-02-28 2014-02-25 Device for controlling and balancing currents for dc/dc converters

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US (1) US9634568B2 (en)
EP (1) EP2962386A1 (en)
CA (1) CA2902367A1 (en)
FR (1) FR3002706B1 (en)
WO (1) WO2014131766A1 (en)

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JP6947504B2 (en) * 2016-12-27 2021-10-13 株式会社京三製作所 Power supply unit and control method of power supply unit
WO2019102587A1 (en) * 2017-11-24 2019-05-31 三菱電機株式会社 Parallel power supply device
KR102611984B1 (en) * 2018-10-10 2023-12-08 삼성전자주식회사 Multi-phase switching regulator comprising interleaving circuit and swithcing regulating method using thereof
US11190101B2 (en) * 2018-10-30 2021-11-30 Lear Corporation System and method for balancing current of converter phases
CN114326893B (en) * 2021-12-10 2023-10-03 北京镁伽科技有限公司 PID control system of adjustable voltage source, adjustable voltage source and image signal generator

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US6278263B1 (en) * 1999-09-01 2001-08-21 Intersil Corporation Multi-phase converter with balanced currents
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Also Published As

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CA2902367A1 (en) 2014-09-04
FR3002706B1 (en) 2016-08-19
WO2014131766A1 (en) 2014-09-04
FR3002706A1 (en) 2014-08-29
US20160013721A1 (en) 2016-01-14
US9634568B2 (en) 2017-04-25

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