EP3891858A1 - Procédé destiné à précharger une section de réseau - Google Patents

Procédé destiné à précharger une section de réseau

Info

Publication number
EP3891858A1
EP3891858A1 EP19729680.9A EP19729680A EP3891858A1 EP 3891858 A1 EP3891858 A1 EP 3891858A1 EP 19729680 A EP19729680 A EP 19729680A EP 3891858 A1 EP3891858 A1 EP 3891858A1
Authority
EP
European Patent Office
Prior art keywords
network
voltage
network section
section
sections
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.)
Pending
Application number
EP19729680.9A
Other languages
German (de)
English (en)
Inventor
Karsten Handt
Hubert Schierling
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 EP3891858A1 publication Critical patent/EP3891858A1/fr
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/001—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection limiting speed of change of electric quantities, e.g. soft switching on or off
    • 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
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/06—Two-wire systems

Definitions

  • the invention relates to a method for precharging a network section of a DC network, and a Computerprogrammpro product with which the method can be carried out. Likewise, the invention relates to a corresponding switching device and a DC network with such a switching device.
  • An energy distribution within an industrial plant or a building by means of direct current is not only due to a simple energy exchange between devices and / or a simple connection to e.g. regenerative energy sources advantageous.
  • DC networks have a number of network sections, which are used, for example, as energy sources, energy stores or loads, ie. H. can be designed as electrical consumers.
  • the network sections are connected to each other in an electrically separable manner via Wegvor devices.
  • the switching device usually has electronic and / or mechanical switches.
  • a DC network also has a connection to a three-phase network, which forms an external energy source of the DC network. The three-phase current is rectified with the help of a rectifier and fed to the DC network via a supply unit.
  • AC Alternating Current
  • these electric drives form capacitors, which are arranged to stabilize and buffer the DC voltage in the inverters, which are obligatory upstream of the AC electric drives, mainly capacitive loads.
  • a compensation current flows through the switching device between a first network section of the DC network functioning as a central supply network and the capacitive loads arranged in a second network section of the DC network, which very large amplitudes can assume - therefore also called switch-on surge - and thus can lead to the thermal destruction of electronic components and to intolerable repercussions on the supply network.
  • this compensating current can be controlled by various measures - however, the underlying principle is to limit the maximum value of the compensating current.
  • the simplest way to limit the equalization current, hereinafter also referred to as precharge current, during a precharge is to conduct the equalization current between the two network sections through a precharge resistor.
  • the pre-charging resistor is only required when switching on the capacitive load to the supply network; it serves to limit the precharge current with which the capacitive load is charged from the supply network. As soon as the capacitive load is charged, the current limitation can be ended; For this purpose, the precharge resistor can be bridged, for example, by means of a bridging contact.
  • switching on a precharge resistor has the disadvantage that there is always a voltage difference between the two network sections if the load draws power in the precharge phase, for example due to the leakage currents of the capacitors, the current through balancing resistors, but also through Auxiliary power supplies that start immediately after reaching a possibly relatively low voltage value.
  • a second option for limiting the compensation current during a pre-charge is to use a step-down converter in the load current path.
  • a step-down converter choke is required. Instead of the buck converter choke as one
  • the inductance of the power lines can alternatively be used. However, this requires a high clock frequency, which leads to larger switching losses at the transistor, and / or it results in a large current ripple; the maximum current of the current ripple can become significantly larger than the nominal current of the step-down converter.
  • the buck converter must be designed for the maximum current of the current ripple, which means that it must have a current carrying capacity many times higher than that actually required for the buck converter.
  • the invention is therefore based on the object of specifying an improved method for precharging.
  • the object is achieved by a method according to claim 1. It is a method for precharging a second network section with electrical energy from a first network section of a DC network.
  • an initial voltage prevailing in the second network section was lower than a DC voltage prevailing in the first network section.
  • the two network sections are electrically connected to one another via a precharging resistor with a resistance current path.
  • the two network sections are electrically connected to one another via a semiconductor switch arranged in parallel with the resistance current path. The semiconductor switch is operated in a clocked mode or in a linear range as a variable resistor.
  • the two network sections are electrically connected via the semiconductor switch arranged parallel to the resistance current path, the two network sections can also remain electrically conductively connected via the resistance current path.
  • the object is also achieved by a switching device according to claim 5. It is a Wegvor device for precharging a second network section with electrical energy from a first network section of a DC network.
  • the switching device comprises a resistance current path having a precharge resistor.
  • the switching device comprises a semiconductor switch arranged parallel to the resistance current path, which is designed to electrically connect the two network sections and which comprises at least one power semiconductor.
  • the power semiconductor can be operated as a controllable resistor in a clocked operation or in an operation in the linear range.
  • the switching device also includes a control unit for controlling the power semiconductor.
  • the essence of the invention is that over the time duration of the voltage adjustment between the two Netzab sections between different current limiting methods is changed, the most suitable depending on the current voltage difference Current limiting method is selected. In this way, the disadvantages inherent in the respective preloading options are largely avoided.
  • the precharging takes place via the precharging resistor: due to the fact that at the beginning of this first section the voltage driving the compensating current is still relatively high, the compensating current flowing between the two sections is also relatively high ; thus, an effective pre-charging can take place first.
  • the voltage level in the second network section tends to while the voltage level in the first network section and the voltage driving the compensating current decreases significantly over time; a phase is reached in which the precharge resistance is relatively large in relation to the reduced driving voltage, so that the equalizing current is substantially smaller than at the beginning of the first period.
  • the second time period of the method according to the invention is started, following the first time period, in which the precharging takes place via a semiconductor switch arranged in parallel with the resistance current path, which is clocked or operated in a linear range.
  • the semiconductor switch in clocked operation acts as a switching DC-DC converter, in which the output voltage is less than the amount of the input voltage.
  • the semiconductor switch is regularly switched on and off by a controller; A few hundred to several million switching cycles are usually carried out per second.
  • the semiconductor switch operated in the linear range acts as a controllable resistor which limits the compensating current. Due to the substantially reduced driving voltage between the two connected network sections at the beginning of the second time section compared to the voltage present at the beginning of the first time section, the compensating current and the corresponding thermal power loss are significantly smaller than they would be under the voltage present at the start of the first time section Ren. Consequently, the semiconductor switch is not thermally overloaded; An oversizing of the semiconductor switch which provides security in this regard can thus be avoided.
  • the present invention thus makes it possible to achieve a full precharge without additional components.
  • the next available high voltage difference between the connected network sections is used.
  • the precharge phase via the semiconductor switch there is a high one Voltage difference that prevails in the pre-charging phase via the pre-charging resistor is undesirable: instead, the now lower voltage difference between the two connected network sections is used.
  • the precharging can be regarded as complete in order to go into normal operation.
  • the two network sections are connected to one another, preferably via the semiconductor switch.
  • the transition between the operation of the semiconductor switch in clocked operation or in the linear range and the subsequent normal operation, in which the two network sections are practically at the same voltage level, is fluid: it is possible to clock the clocked operation via a peak current value of the compensating current to regulate, which at some point can no longer be reached and thus the semiconductor switch simply remains switched on; alternatively, it is possible to regulate the active area via a current to flow, so that the set resistance value always decreases until it finally reaches the minimum value, i.e. the switch remains switched on.
  • the present invention implements a protection concept for the plant operation in order to avoid a damaging compensating current, the protection concept being able to be variably adapted to the plant configuration.
  • the two network sections are connected via the semiconductor switch as soon as the voltage in the second network section is between 60 and 90 percent of the DC voltage.
  • This voltage range is the optimal range for opening the semiconductor switch, since there is the best compromise between an increasing delay with a further precharge via the precharge resistor and a greater power loss or risk of damage caused by high currents when precharging started earlier via the semiconductor switch.
  • the two network sections are connected via the semiconductor switch as soon as an equalizing current flowing via the resistance current path is less than a predetermined threshold value.
  • the threshold value can be selected so that the best compromise for the given network section constellation is between an increasing delay with a further precharging via the precharging resistor and a greater power loss or risk of damage from high currents when precharging starts earlier via the semiconductor scarf ter achieved.
  • the resistance current path has a switch in series with the precharging resistor, the control unit being designed to control the switch. With the switch, the resistance current path can be opened and closed by the precharging resistor.
  • the switch arranged in the resistance current path comprises at least one power semiconductor.
  • This switch can be used as a switchable semiconductor, e.g. B. a transistor, an IGBT, a MOSFET, or the like. It is also possible for the switch to be designed in the form of two switchable semiconductors which are connected in series, if appropriate in each case with a diode connected in antiparallel to the switchable semiconductor. If a mechanical switch is to switch the precharging resistor on and off, the mechanical switch must have a DC switching capacity; this is often difficult to achieve with mechanical switches. A switchable power semiconductor has a DC switching capacity, and a power semiconductor can also switch significantly faster than a mechanical switch.
  • the task outlined is also solved by a computer program product according to the invention.
  • the computer program product is designed to be executable in at least one control unit.
  • the computer program product can be used as software, e.g. B. as an app downloadable from the Internet, or as firmware in a memory storable and designed to be executable by a processor or arithmetic unit.
  • ASIC Application Specific Integrated Circuit
  • the computer program product is designed to implement and carry out at least one embodiment of the sketched method for precharging a network section.
  • the computer program product according to the invention can be designed to carry out the method for precharging a network section which is designed to be executable in a control unit of the switching device.
  • the computer program product can combine all the sub-functions of the method, that is to say it can be monolithic.
  • the computer program product can also be designed in a segmented manner and in each case distribute partial functions to segments that are executed on separate hardware. So it can Computer program product can be designed to be partially executable in a control unit of the first network section and partially in a control unit of the second network section.
  • part of the method can be carried out in a control unit and another part of the method can be carried out in a higher-level instance of the control unit, such as, for example, a PLC, a handheld parameterization device or a computer cloud.
  • the outlined task is also solved by a DC network according to the invention with a first network section and a second network section, wherein in an initial state an initial voltage prevailing in the second network section is lower than a DC voltage prevailing in the first network section.
  • the DC network has a switching device according to the invention, as described above, arranged between the first network section and the second network section.
  • the two network sections each comprise a first line and a second line, between which the voltage of the respective network section is applied, the two network sections being permanently connected to one another via the second lines and by means of the first lines a switching device can be connected and separated from each other.
  • FIG. 1 shows a DC network with several network sections
  • Figure 2 shows a central network section and a network section with a consumer and a switching device connected between the network sections.
  • Fig. 3 is a schematic representation of a Heidelbergvorrich device
  • Fig. 4 shows a first embodiment of a Heidelbergvorrich device
  • Fig. 6 shows another embodiment of a Wegvor direction
  • Fig. 8 is a diagram for explaining the clocked Be
  • Fig. 9 is a diagram for explaining the operation in the linear area of a line semiconductor.
  • the present invention relates to an electrotechnical situation.
  • Terms such as “connected” and “separated” or “isolated” and the like are therefore always meant in the electrical sense, not in the mechanical sense.
  • FIG. 1 shows a DC voltage network 100 with a multiplicity of network sections 31.
  • the network sections 31 are additionally supplemented with a single small letter in the illustration in FIG. 1. If reference is made to a very specific th of the network sections 31 shown in FIG. 1, the reference symbol supplemented by the corresponding small letter is used, for example reference numeral 31c or 31f. If, however, reference is only made generally to the network sections 31, only the reference number 31 is used without the addition of a small letter.
  • the DC voltage network has a central network section, briefly referred to as a central section. 1, this is the network section 31a.
  • the central section 31a represents the “hub” for the other network sections 31.
  • the central section 31a is therefore common for the other network sections 31.
  • the network sections 31 can form branches similar to a tree structure.
  • the network section 31d is subdivided into further network sections 31e to 31h.
  • several Netzab sections 31 can be connected in series. 1, these are the network sections 31k and 311.
  • the “network section” 31m represents the connection of the central section 31a to an AC network - here a three-phase network.
  • the type of network sections 31 as such can be determined as required, for example as a load zone, a robot cell or a load feeder. However, they generally each have an electrical energy store 32.
  • the energy store 32 can be a battery or a capacitor, for example.
  • the network sections 31 usually have at least one energy source 33 and / or at least one consumer 34.
  • An example of an energy source 33 is a photovoltaic system or a (charged) battery.
  • Examples of consumers 34 are an electric motor, a heater, and an (uncharged) battery.
  • other energy sources 33 and other consumers 34 may also be present. Combinations are also possible.
  • only one of the network sections 31 of the energy store 32, the energy source 33 and the consumer 34 are shown in FIG. 1.
  • the corresponding Units 32, 33 and 34 can, however, also be present in the other network sections 31.
  • the DC voltage network each has a switching device 35 for the network sections 31.
  • the switching device 35 can connect the respective network section 31 to at least one other network section 31 or separate it from the at least one other network section 31.
  • the network sections 31b to 311 can be connected or separated from the central section 1a directly or indirectly via other network sections 31.
  • a switching operation i.e. a change between two different ones
  • the switching device 35 of the network section 31f connecting or disconnecting the network section 31f with or from the network section 31d.
  • the network section 31f is thus connected or disconnected from the central section 31a via the network section 31d, or only connected to or disconnected from the network section 31d without a further connection to the central section 31a.
  • the network sections 31 Due to the design as a DC voltage network, the network sections 31 have a first, positive potential F1 in a first electrical line L + and a second, negative potential F2 in a second electrical line L-.
  • the reference characters L +, L- of the lines are shown in FIG. 1 only for the network sections la and lf.
  • Two lines of the network sections 31, which are at the same or an approximately the same potential F, can be connected to one another via the switching devices 5, for example a first electrical line L + lying at a positive potential F1, one of the network sections 31 with a positive potential F1 lying first electrical lines L + of the other network sections 31, and analogously a second electrical line L- lying on a negative potential F2 - one of the Network sections 31 with second electrical lines L- lying at a negative potential F2 of the other network sections 31.
  • a switching device 35 is formed such that - depending on the switching state - there is only one first line L + lying on a first, positive potential F1 of a first network section 31 of a first line L + lying on the first positive potential F1 the other network sections 31 separates or connects to them.
  • the second lines L- of the network sections 31 which are at negative potential F2, however, are permanently connected to one another. In this case, there is possibly only a single-pole separation of the respective network section 31 from the other network sections 31. There is therefore only one (1) switching path. Without restricting generality, it can always be assumed that the positive potential F1 is the switched potential, while the negative potential F2 is not switched. In principle, however, the reverse procedure is also possible.
  • a first switch preferably disconnects or connects a first line L + of a first network section 31 which is at a first potential F1 from or to a first line L + of the other network sections 31 which is at the first potential F1 and disconnects or connects one of them a second line L- of a first network section 31 lying at a second potential F2 of or with a second line L- of the other network sections 31 lying at the second potential F2.
  • the positive potentials F1 are identical to one another and also the negative potentials F2 are identical to one another.
  • the potential difference U between the positive potentials F1 and negative potentials F2, ie the electrical voltage present between the conductors L +, L-, is therefore the same for the network sections 31.
  • the voltage U should be equal to a nominal value.
  • the nominal value can be chosen as required; it can lie, for example, at 24 V, at 380 V, at 760 V or another suitable value.
  • the negative potential F2 is still the same for the network sections 31.
  • the positive potential F1 can have individual values for the network sections 31 or groups of network sections 31, if applicable. In the case of two-pole separation, this also applies to the negative potential F2.
  • the voltage U can, however, have its own value for the respective network section 31 or the respective group of network sections 31.
  • the switching device 35 connects the line L + of the central network section 31a which is at a positive potential with the corresponding line L + of the consumer network section 31i and the line L- of the central network section which is at a negative potential 31a with the corresponding line L- of the consumer network section 31i.
  • FIG. 3 shows the switching device 35 shown in FIG. 2 in an even larger illustration, by means of which the consumer network section 31i can be electrically connected to the central network section 31a with the electrical consumer 34 or separated therefrom.
  • the switching device 35 allows a single-pole separation of the network section 31i from the central network section 31a, the switching device 35 separating the lines L + which are at a positive potential and the network sections 31a, 31i and the lines L which are at a negative potential -
  • the network sections 31a, 31i can always be connected.
  • the switching device 35 has a semiconductor switch 1 with which the positive lines L + can be separated and connected to who.
  • the semiconductor switch 1 has at least one power semiconductor which can be operated in a clocked mode or can be operated in a linear mode as a controllable resistor.
  • the switching device 35 has a resistance current path 2, in which the compensating current is passed through a precharging resistor.
  • the semiconductor switch 1 and the resistance current path 2 can be controlled by a control unit 16, which with a Data storage 17 is connected.
  • a computer program product is stored in the data memory and, when executed by the control unit 16, carries out the steps of the method according to the invention.
  • Fig. 4 shows a first embodiment of the Wegvor direction.
  • the resistance current path 2 comprises two anti-serial IGBTs 7 and 9, hereinafter simply referred to as a transistor for simplification, each with a diode 8, 10 connected in parallel with the transistor 7 and 9, and a precharge resistor connected in series with the transistors 6.
  • the transistors 7, 9 are driven by a first control unit 12, ie switched on or off: this is done by changing the gate-emitter voltage on the respective transistor 7, 9.
  • the current path In a first current direction, the current path thus runs through a first switched transistor 9, which is antiparallel to the second, blocking transistor 7 connected diode 8 and the precharging resistor 6.
  • the current path In a second current direction directed against the first current direction, the current path thus runs through the precharging resistor 6, the second, switched transistor 7 and the diode 10 switched antiparallel to the first, switched transistor 9 .
  • the current path through the semiconductor switch 1 runs through two series-connected, switchable power semiconductors 3, which are designed as anti-serial, normally blocking n-channel MOSFETs.
  • the MOSFETs 3 are controlled by a second control unit 13, ie switched on or off: the MOSFETs 3 are controlled via a control voltage (gate-source voltage) or a control potential (gate potential), with which the current flow can be carried out from drain to source.
  • MOSFETs have an intrinsic inverse diode, so it is possible to dispense with an antiparallel to the MOSFETs 3 diodes, as required by the IGBT in the resistance current path 2.
  • a snubber element 4, 5 is formed parallel to the two MOSFETs 3 by connecting a capacitor 4 in series with a resistor 5, here: a variable resistor, which is also referred to as a varistor.
  • the capacitor 4 and the resistor 5 are dimensioned to match the voltage and the current.
  • the snubber element 4, 5 limits an overvoltage when the MOSFETs 3 are switched off.
  • FIG. 4 also shows a voltage detection device 11 for measuring the electrical voltage dropping across the switching device 35, and a current detection device 14 for measuring the current flowing through the switching device 35
  • the signal processing device 15 can be externally, e.g. received by an operator of the switching device, signals 19 for switching on and off and externally, e.g. Send status signals 20 to an operator of the switching device.
  • the current detection device 14 By means of the current detection device 14, both the resistance current path 2 and the current flowing through the semiconductor switch 1 can be measured.
  • FIG. 5 shows a flowchart of a method according to the invention for limiting a compensation current between the two network sections 31a, 31i, wherein in an initial state 51 an initial voltage U2_t0 prevailing in the second network section is less than a DC voltage U D c prevailing in the first network section is.
  • a first step 52 the two network sections 31a, 31i are electrically connected via the resistance current path 2 having a pre-charging resistor.
  • the compensation current flowing through this electrical connection the level of which is limited by the precharging resistor, flows in one direction, so that the potential difference between the two network sections 31a, 31i is equalized, in other words: the compensation current builds the voltage difference between the two Network sections 31a, 31i continuously.
  • a query step 53 queried whether the voltage U2 in the second network section 31i lies between the initial voltage U2_t0 and the DC voltage U D c and whether the voltage value U2 in the second network section 31i exceeds a certain percentage of the DC voltage U D c: as long as the If the voltage value U2 in the second network section 31i does not exceed a certain percentage of the DC voltage U D c (arrow “N”), the semiconductor switch 1 remains closed.
  • Fig. 6 shows a further embodiment of a voltage detection device 11 for the invention
  • voltage detection device 11 taps the voltage difference in first electrical line L + at measuring points before and after switching device 35 and the potential F2 of second electrical line L-.
  • Fig. 7 shows a plot of the current or voltage course of a power semiconductor with changes in state against the time t.
  • Four measurement curves 21-24 are shown in the diagram.
  • the measurement curve 21 characterizes the gate signal in the power semiconductor 3 in the main branch.
  • the compensating current I A is represented by the measurement curve 22.
  • the measurement curve 23 shows the voltage across the switching device according to the invention.
  • the DC line voltage U D c is shown in curve 24.
  • the illustration in FIG. 7 is also divided into areas A, B, C and D. In area A, starting with to and ending with ti, the power semiconductor 3 is switched off. The entire voltage drops here across the power semiconductor. In area B, between ti and t2, a precharge is shown via the precharge resistor until a threshold value is reached.
  • the area C shows the clocking of the power semiconductor in the main path up to a voltage difference of zero or until the compensating current is less than a predetermined reference value.
  • the dashed lines of the measurement curves are intended to indicate that the measurement curves in area C show very large deflections, caused by the clocked operation; the dashed line indicates a kind of mean value.
  • the switched-on power semiconductor is shown in area D, starting at t3, there now being no voltage difference between the input and output.
  • Fig. 8 shows a diagram for explaining the clocked operation of a semiconductor switch.
  • the semiconductor e.g. B. a transistor, works as a switch that is turned on and off at a high frequency, e.g. B. by means of a pulse width modulated control voltage or by means of a two-point control.
  • Fig. 8 In the upper part of Fig. 8 is shown in a plot of a voltage U over the time t that the semiconductor switch to which the voltage V is present is open for a period 0 to ti of a period T (on time) and is closed in the remaining partial area ti to T ge.
  • the quotient between switch-on time and period (ti / T) is called duty cycle or duty cycle.
  • a plot of a compensation current I A over time t shows that this opening and closing of the semiconductor switch, which changes in the pulse duty factor, results in a triangular course of the compensation current I A caused by the driving voltage V, the compensating current I A oscillating with an amplitude DI A between a minimum value I A , min and a maximum value I A , max .
  • An average compensating current is obtained as the time average of the triangularly fluctuating current
  • a left-hand, linear (ohmic) operating range lin of the semiconductor is separated from a right-hand, saturated (active) operating range sat of the semiconductor by a dashed parabolic line V D sat .
  • This representation of the relationships between the drain current I D and the drain-source voltage V DS as a function of the gate-source voltage V G s is referred to as the output characteristic field of a MOSFET.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Power Conversion In General (AREA)
  • Electronic Switches (AREA)

Abstract

L'invention concerne un procédé destiné à précharger une deuxième section de réseau (31i) avec de l'énergie électrique provenant d'une première section de réseau (31a) d'un réseau en CC (100). Selon l'invention, une tension initiale (U2_t0) se produisant dans la deuxième section de réseau (31i) est inférieure à une tension en CC (UDC) se produisant dans la première section de réseau (31a) dans un état initial (t0). À un premier instant (t) les deux sections de réseau (31a, 31i) sont connectées par le biais d'un chemin de courant de résistance (2) comportant une résistance de précharge (6). À un deuxième instant (t2) ultérieur, dès que la tension (U2) dans la deuxième section de réseau (31i) est comprise entre la 1re tension initiale (U2_t0) et la tension en CC (UDC), les deux sections de réseau (31a, 31i) sont connectées par le biais d'un commutateur semi-conducteur (1) agencé en parallèle du chemin de courant de résistance (2), lequel fonctionne selon un fonctionnement cadencé ou fonctionne dans une zone linéaire en tant que résistance réglable.
EP19729680.9A 2019-01-31 2019-06-03 Procédé destiné à précharger une section de réseau Pending EP3891858A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP19154722 2019-01-31
PCT/EP2019/064312 WO2020156689A1 (fr) 2019-01-31 2019-06-03 Procédé destiné à précharger une section de réseau

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EP3891858A1 true EP3891858A1 (fr) 2021-10-13

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EP (1) EP3891858A1 (fr)
CN (1) CN113383475A (fr)
WO (1) WO2020156689A1 (fr)

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DE102022131309A1 (de) 2022-11-28 2024-05-29 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Vorrichtung zur Erzeugung eines Stroms

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US9925933B2 (en) * 2013-08-30 2018-03-27 Ford Global Technologies, Llc Pre-charge quick key cycling protection
US20170229872A1 (en) * 2016-02-10 2017-08-10 Eguana Technologies Inverter pre-charge circuit
EP3379675A1 (fr) 2017-03-23 2018-09-26 Siemens Aktiengesellschaft Construction optimisée d'un système de tension continue et procédé lors d'une panne du réseau d'alimentation

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