WO1998008287A1 - Groupes electrogenes pour reseaux isoles - Google Patents

Groupes electrogenes pour reseaux isoles Download PDF

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Publication number
WO1998008287A1
WO1998008287A1 PCT/EP1997/004222 EP9704222W WO9808287A1 WO 1998008287 A1 WO1998008287 A1 WO 1998008287A1 EP 9704222 W EP9704222 W EP 9704222W WO 9808287 A1 WO9808287 A1 WO 9808287A1
Authority
WO
WIPO (PCT)
Prior art keywords
current
converter
circuit
circuit breaker
short
Prior art date
Application number
PCT/EP1997/004222
Other languages
German (de)
English (en)
Inventor
Ulrich Horn
Klaus Kranert
Original Assignee
Stn Atlas Elektronik Gmbh
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 Stn Atlas Elektronik Gmbh filed Critical Stn Atlas Elektronik Gmbh
Publication of WO1998008287A1 publication Critical patent/WO1998008287A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J3/00—Driving of auxiliaries
    • B63J3/02—Driving of auxiliaries from propulsion power plant
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/06—Details with automatic reconnection
    • H02H3/063—Details concerning the co-operation of many similar arrangements, e.g. in a network
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
    • H02H7/263—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of measured values
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J3/00—Driving of auxiliaries
    • B63J2003/001—Driving of auxiliaries characterised by type of power supply, or power transmission, e.g. by using electric power or steam
    • B63J2003/002—Driving of auxiliaries characterised by type of power supply, or power transmission, e.g. by using electric power or steam by using electric power
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. DC/AC converters
    • H02H7/1227—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. DC/AC converters responsive to abnormalities in the output circuit, e.g. short circuit

Definitions

  • the invention relates to a power supply system for island networks, in particular for ship electrical systems, of the type defined in the preamble of claim 1.
  • the shaft generator is a synchronous generator which is driven by a drive shaft of a main machine, e.g. a marine diesel or a gas turbine for driving the propeller.
  • the main engine is driven at a variable speed depending on the desired ship speed, so that the shaft generator is driven at a variable speed.
  • the wave generator feeds into the vehicle electrical system via a self-commutated converter with reactive power machine and line chokes.
  • the converter is controlled by a device for frequency and phase detection of the vehicle electrical system.
  • Emitter-base voltage of the converter transistors in the event of a fault current caused by a short circuit in the network, switches off the converter if this fault current exceeds an approved value. If there is no such integrated overload protection in the converter, it must be provided to prevent the converter from being destroyed. If a short circuit occurs in the known power supply system in the on-board electrical system, an overload protection, which is not explicitly mentioned, will also switch off the converter, so that there is no need to feed the wave generator into the on-board electrical system. The shaft generator can only be connected to the vehicle electrical system again after troubleshooting and fault rectification.
  • the invention has for its object to improve a power supply system for an island network, in particular for an on-board network of ships, of the type mentioned so that a sole supply of the island network is possible by the wave generator with converter and occurring short circuits do not lead to a failure of the power supply , ie all consumers not affected by the short circuit can continue to be operated.
  • the object is achieved according to the invention in a power supply system of the type specified in the preamble of claim 1 by the features in the characterizing part of claim 1.
  • the power supply system has the advantage that a short circuit in the power distribution network is recognized very quickly, the short circuit location is identified very quickly and the short circuit is very quickly eliminated by opening the circuit breaker closest to the short circuit location.
  • a shutdown that has already taken place before the short-circuit shutdown, possibly due to the overload protection of the converter is quickly canceled by a reset device after the short circuit has been eliminated, and the converter synchronizes itself to the residual voltage of asynchronous motors which are always present on the power distribution network.
  • an activation signal for the reset device is either given by the protection computer, which consists of a logical AND combination of the activation command and the Activation feedback generated, or derived from the return of the residual voltage of an asynchronous motor connected to the network.
  • the circuit breakers are additionally assigned conventional protective devices for overcurrent protection, which automatically open them after a time delay when a fault current occurs in the assigned circuit breaker.
  • the protective devices are preferably integrated into the respectively assigned switching devices, so that switching relays required for actuating the circuit breaker and the current sensors for current detection need only be present once in both the switching device and the protective device.
  • the overcurrent protection serves as a time-delayed backup protection in the event that the protective computer does not issue an activation command and provides additional security in the event of any malfunctions in the digital network protection.
  • the reset device ensures that the circuit breaker affected by the short circuit is released by the protective device that responds with a time delay and that the converter shutdown is canceled and the converter feed continues into the power distribution network.
  • the changeover device has a frequency controller which quickly lowers the setpoint frequency when the setpoint value of the converter current is exceeded and, after opening the fault current-carrying circuit breaker and the associated switching off of the short circuit, slowly raises the setpoint frequency again to the original setpoint.
  • This measure reduces the load on the shaft generator due to the asynchronous motors to be accelerated again on the power distribution network when the converter operation is resumed. This load can be reduced even further if, when the converter is switched off, all "unimportant" consumers connected to the power distribution network are disconnected from the network until the converter shutdown is canceled by the reset device.
  • the overload protection is additionally designed such that it switches off the converter when the duration of the Current limitation by the reversing device exceeds a predetermined period of time or a predetermined value of the temporal current integral is exceeded. This prevents thermal overloading of the converter's semiconductors during current control. If, after such a shutdown of the converter, the reset device only cancels the converter shutdown with a time delay, it is ensured that the protective devices have tripped beforehand due to an undervoltage, so that the short circuit is switched off in any case.
  • the individual activation time of the protective devices assigned to the individual circuit breakers is chosen to be shorter with increasing distance of the circuit breakers from the converter in the power distribution network. This ensures that the short circuit is switched off by opening the circuit breaker closest to the fault location.
  • FIG. 1 is a block diagram of a power supply system for a ship's electrical system
  • FIG. 2 shows a detail of the block diagram in FIG. 1 with greater detail reproduction
  • FIG. 3 shows a block diagram of a power supply system for a ship's electrical system according to a modified exemplary embodiment
  • 4 shows a detail of the block diagram in FIG. 3 with greater detail reproduction
  • the power supply system for a ship's electrical system as an example of an island network shown in the block diagram in FIG. 1, has a shaft generator 10 which is driven in a known manner by the output shaft of a diesel or gas-driven main machine for driving the propeller.
  • the shaft generator 10 can either sit directly on the output shaft or - as in DE 35 36 448 AI - be coupled to the output shaft via a gear.
  • the wave generator 10 feeds via a converter 11 into the ship's electrical system designed as a power distribution network 12.
  • the power distribution network 12 is in main supply lines 13 and in
  • Sub-distribution lines 14 and 15 divided.
  • the sub-distribution lines 14, 15 are coupled to one another via circuit breakers 16 and connected to the main supply lines 13 via circuit breakers 16.
  • the consumers located on the power distribution network 12 are coupled to the main supply lines 13 or the sub-distribution lines 14, 15 via circuit breakers 16.
  • Three asynchronous motors 17 are indicated by way of example in FIG. 1 as current consumers.
  • Each circuit breaker 16 is equipped with a switching device 18, which is generally designed as an electromagnetic switching relay operating according to the open-circuit principle, i.e. the circuit breaker 16 opens when charging with excitation current.
  • the converter 11 is designed as an intermediate circuit converter and comprises one connected to the shaft generator 10 Rectifier 19, which can be designed as a diode, thyristor or pulse rectifier, a voltage intermediate circuit 20 and a pulse soft rectifier 21 which is connected via a three-phase line reactor 22 to the main supply line 13 of the three-phase power distribution network 12. Between the line reactor 22 and the main supply line 13 there is also a line switch 23 with which the current distribution network 12 can be separated from the wave generator 10. A converter control unit 24 ensures that the pulse inverter 21 is regulated to a constant frequency and constant voltage.
  • a converter overload protection 25 ensures that the converter 11 is switched off in the event of an overload.
  • the overload detection can take place, for example, in the converter 11 itself, in which the base-emitter voltage of the power transistors 27 is evaluated or - as shown in FIG. 1 - by a current sensor 27 which is connected to the line reactor 22. Both alternatives can be used simultaneously, as can be seen from the detailed illustration of the overload protection 25 in FIG. 2.
  • the overload detection integrated in the converter 11 is indicated in FIG. 2 by 28, which is connected to the one input of an OR element 29 of the overload protection 25.
  • the output of the current sensor 27 is connected to the input of a threshold switch or discriminator 30, which sends a signal to the second input of the OR gate 29 when its threshold is exceeded by its input signal.
  • the output of the OR gate 29 is connected to a flip-flop 31 and sets the flip-flop 31 when an input signal is present, as a result of which the converter control unit 24 connects the transistors 27 to the Pulse inverter 21 passing control or switching pulses are suppressed.
  • the converter control unit 24 is shown in more detail in FIG. 2.
  • a power acquisition 32 to which the actual value of the converter current detected by the current sensor 27 and an actual value of the voltage taken at the output of the line reactor 22 is supplied, provides a corrected set frequency f ' so n and a corrected set voltage u' via a frequency statics 33 and a reactive current statics 34. sol - based on a predetermined target frequency f so n for a scalar control 35 of the control unit 24.
  • the corrected setpoints f ' so n and u' should be applied to the scalar control 35 via gate circuits 36, 37 which are controlled by the flip-flop 31.
  • the flip-flop 31 also controls the release of the control or switching pulses generated by the scalar controller 35 for the pulse-controlled inverter 21 and a gate circuit 38 via which the frequency specification f so n is made.
  • the switching pulses of the scalar control 35 become the basis of the
  • a network protection system which consists of current sensors 39, a protection computer 40 and a reset device 41.
  • One of the current sensors 39 is assigned to one circuit breaker 16.
  • the current sensors 39 and the switching devices 18 for the Circuit breaker 16 communicate with the
  • Protective computer 40 for which purpose the current sensors 39 are connected to a data bus 42 leading to the protective computer and the switching devices 18 are connected to a power supply and data bus 43 going out from the protective computer 40.
  • An address is assigned to all circuit breakers 16.
  • Current sensor 39 and switching device 18, which are assigned to a circuit breaker 16, have the same address.
  • the current sensors 39 detect the current and the direction of the current flowing via the assigned circuit breaker 16 and pass these values as sensor values connected to an address to the protective computer 40 via the data bus 42.
  • the latter evaluates the sensor values and determines if a short circuit occurs in the power distribution network 12 the short-circuit location to the sensor values and the assigned addresses and immediately addresses a disconnection command to the switching device or devices 18 whose circuit breaker or switches 16 are affected by the short circuit.
  • the controlled switching devices 18 open the circuit breaker or switches 16, so that either the fault-carrying consumer or the fault-carrying sub-distribution circuit 14 or 15 is switched off.
  • the opening or disconnection of the circuit breaker 16 affected by the short-circuit is brought to the attention of the protection computer 40 by an activation feedback, the corresponding signal being generated either by the switching device 18 or by the current sensor 39 and being supplied to the protection computer 40 via one of the buses 42 or 43.
  • the protective computer 40 generates an activation signal by means of a logical AND operation of the activation command addressed by it to the circuit breaker 16 affected by the short circuit and the activation feedback of the circuit breaker 16 affected by the short circuit OR gate 44 of the reset device 41 arrives.
  • the reset device 41 connected on the output side to the flip-flop 31 sets due to this
  • the flip-flop 31 can also by the return of the residual voltage of a
  • the reset device 41 has a subtraction stage 45 and a discriminator 46 or threshold switch connected downstream thereof, the output of which is connected to a second input of the OR gate 44.
  • the subtracting stage 45 is supplied with the voltage tapped at the output of the line reactor 22 and a reference voltage u ref . If the voltage difference exceeds the threshold value set in discriminator 46, a reset signal reaches flip-flop 31 via OR gate 44, and the converter control unit 24 is deactivated in the same way.
  • the flip-flop 31 can still be reset by hand, for which purpose a switch 47, which can be operated by hand, is connected to a third input of the OR element 44. When the switch 47 is closed briefly, the reset device 41 is supplied with an activation signal.
  • a power supply system is shown, which is slightly modified compared to that described above. As far as components of the power supply system in Fig. 3rd 1 match those of the power supply system, these are identified by the same reference numerals.
  • the power supply system according to the block diagram according to FIG. 3 is modified in such a way that the network protection system with current sensors and protective computers has been omitted. In its place there is a short-circuit detection system, consisting of a current sensor, which detects the current flowing through the converter 11 extremely quickly, and a reversing device 50, which, when a specified value of the current flowing via the converter 11 is exceeded, converts the converter 11 from constant voltage regulation to constant Current control switches to a current limit value above the specified value.
  • the current sensor 27 already described in FIG. 1 at the output of the line reactor 22 or the line filter 22 ' is used as the current sensor.
  • the reversing device 50 shown in detail in FIG. 4 has a current limiter 51, a subtractor 52 and a frequency controller 53.
  • the output of the current limiter 51 is connected to the two inputs of the subtractor 52 and, on the other hand, the predetermined nominal frequency f so ,
  • the output of the subtractor 52 is connected to the input of the frequency regulator 53, and the output of the frequency regulator 53 is connected to the frequency statics 33 and the reactive current statics 34.
  • the current limiter 51 is designed so that when the specified value of the current i flowing through the converter 11 is exceeded, which is fixed, for example, at 1.2 times the nominal current, an output signal is generated which is sent via the subtractor 52 to the input of the frequency controller 53 set target frequency f so]
  • the frequency controller 53 is designed so that this Frequency reduction is fast-acting, the re-rise of its input frequency to the target value f so ⁇ but only gradually its output frequency f lim. Olgt. This ensures that when the short circuit is eliminated and the converter 11 is switched from constant current control to constant voltage and frequency control, the frequency only rises slowly and the load on the shaft generator 10 which occurs as a result of the asynchronous motors 17 starting up is thus reduced.
  • Each of the circuit breakers 16 is equipped with a protection device 54 for overcurrent protection, which releases the circuit breaker 16 with a time delay in the event of a fault current, i.e. opens.
  • the individual activation time of the individual protective devices 54 i.e. the time from the start of the fault current flow of the circuit breaker 16 until it is opened by the protective device 54 is dimensioned differently, in such a way that this activation time is smaller with increasing distance in the power distribution network 12 of the assigned circuit breaker 16 from the converter 11.
  • the circuit breaker 16 close to the consumer switches off first since it is furthest away from the converter 11 and therefore has the smallest delay time. Only then does one which connects a sub-distribution line 14 or 15 to the main supply line 13 open
  • Circuit breaker 16 since its protective device 54 has a longer disconnection time.
  • the current sensor 27 rises Line reactor output detected converter current. If the preset value, for example 1.2 times the nominal current, is exceeded, the reversing device 50 changes the converter control unit 24 from constant voltage regulation to constant current regulation. As a result of this changeover, there is a regulating intervention by the converter 11 with a current limitation, so that an increased current flow is maintained for a longer time, which is sufficient for the protective devices 54 for overcurrent protection to trip on the circuit breakers 16, open the overcurrent-carrying circuit breaker 16 and thus switch off the short circuit .
  • the current limit value is, for example, set to 1.5 times the nominal current.
  • the converter control unit 24 automatically switches back to constant voltage regulation by eliminating the corrective intervention of the reversing device 50. If the converter current rises very steeply in the event of a short circuit, so that the overload protection 25 responds before the current control through the reversing device 50 intervenes, the overload protection 25 switches off the converter 11, as already described with reference to FIGS. 1 and 2. In this case, the reset device 41 again provides for the cancellation of the converter shutdown as soon as the short circuit has been eliminated.
  • the overload protection 25 is additionally expanded to the extent that it additionally switches off the converter 11 if, after the converter 11 has been converted to constant current control, the current limit value is exceeded for a predetermined period of time.
  • the output of the current limiter 51 is connected to a threshold switch 55 which switches on when the predetermined threshold is exceeded (for example 1.5 times the nominal current) Timer 56 starts. After a specified time has elapsed, the timing element 56 sends a signal to the OR element 29 which sets the flip-flop 31 and thus switches off the converter 11.
  • an integrator can also be used, which determines the temporal current integral when the current limit value is exceeded and sets the flip-flop 31 via the OR element 29 when a predetermined value of the current integral is reached. This additional shutdown function of the overload protection 25 prevents thermal overloading of the semiconductors in the converter 11.
  • the reset device 41 has a timer 57 connected to the threshold detector 55 and to an input of the OR gate, which is started with an output signal from the threshold switch 55 and, after the set time has elapsed, emits a signal which, via the OR gate 44, flips -Flop 31 resets.
  • the time delay is chosen so that the circuit breakers 16 have all reliably opened due to their undervoltage release. Such an undervoltage release
  • Circuit breaker 16 is basically provided in ship's electrical systems to ensure that after a mains shutdown all consumers are disconnected from the mains and that no consumer is already connected to the mains when the voltage returns, but must be individually connected to the mains. This delayed "restart" of the converter 11 ensures that the short circuit has been switched off in any case by opening all the circuit breakers 16. If the individual circuit breakers 16 are now switched on again one after the other, so can be detected by the occurrence of a new short circuit, the fault current carrying circuit breaker 16 and thus the short circuit can be eliminated.
  • the circuit breakers 16 in FIG. 1 can additionally be equipped with a protective device 54 for overcurrent protection, so that the fault-current-carrying circuit breaker 16 also trips if it does not receive an activation command from the protection computer 40 due to a fault.
  • the protective devices 54 are then expediently integrated into the switching devices 18, so that components, such as switching relays and current sensors, need only be present once in both devices.
  • the power supply system according to FIG. 4 can also be additionally equipped with a network protection system, as has been described for FIG. 1.
  • a network protection system as has been described for FIG. 1.
  • the short-circuit location can be determined and the short-circuit can thus be eliminated by an unlock command to the fault-current circuit breaker 16.
  • the pulse inverter of the converter can also be constructed from thyristors instead of the power transistors.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

L'invention concerne un groupe électrogène pour réseaux isolés, comprenant un alternateur de ligne d'arbre (10) à vitesse de rotation variable, un réseau de distribution (12) qui est divisé en branches d'alimentation principales, reliées par l'intermédiaire de sectionneurs de puissance (16), et en branches d'alimentation secondaires (14, 15) destinées à des consommateurs de courant (17) qui peuvent être mis en circuit au moyen des sectionneurs de puissance (16), et comprenant également un convertisseur de fréquence (11) placé entre l'alternateur de ligne d'arbre (10) et le réseau d'alimentation (12), ainsi qu'un dispositif de protection contre les surcharges affecté au convertisseur de fréquence. Dans le groupe électrogène présenté, il est prévu, pour permettre une alimentation indépendante par l'alternateur de ligne d'arbre (10) sans panne du réseau en cas de court-circuit, un système qui est constitué des détecteurs de courant (39) affectés à chacun des sectionneurs de puissance (16) et d'un calculateur de protection (40) qui, à partir des valeurs données par les détecteurs et des adresses de ceux-ci, localise un court-circuit dans le réseau de distribution (11) et donne une instruction de libération au sectionneur de puissance concerné par le court-circuit. Un dispositif de remise à l'état initial (41) sert, en cas de mise hors circuit du convertisseur de fréquence par un dispositif de protection contre les surcharges (25), à faire cesser la mise hors circuit du convertisseur de fréquence lors de l'annulation du court-circuit.
PCT/EP1997/004222 1996-08-23 1997-08-02 Groupes electrogenes pour reseaux isoles WO1998008287A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19634094.2 1996-08-23
DE1996134094 DE19634094A1 (de) 1996-08-23 1996-08-23 Stromversorgungsanlage für Inselnetze

Publications (1)

Publication Number Publication Date
WO1998008287A1 true WO1998008287A1 (fr) 1998-02-26

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PCT/EP1997/004222 WO1998008287A1 (fr) 1996-08-23 1997-08-02 Groupes electrogenes pour reseaux isoles

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DE (1) DE19634094A1 (fr)
WO (1) WO1998008287A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102457198A (zh) * 2012-01-16 2012-05-16 中钢集团天澄环保科技股份有限公司 电除尘器高压电源
WO2018218862A1 (fr) * 2017-05-31 2018-12-06 广船国际有限公司 Procédé et dispositif de vérification de performance de régulation de tension, et système de réseau électrique de navire
CN111337772A (zh) * 2020-03-18 2020-06-26 无锡赛思亿电气科技有限公司 多功能负载电路变频器试验平台及其实验方法
CN114421442A (zh) * 2022-01-18 2022-04-29 山东鲁软数字科技有限公司智慧能源分公司 一种智能并网开关及电网保护装置

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Publication number Priority date Publication date Assignee Title
DE19716826A1 (de) * 1997-04-22 1998-11-19 Stn Atlas Elektronik Gmbh Stromversorgungsnetz, insbesondere Schiffsbordnetz
DE19962615A1 (de) * 1999-12-23 2001-07-05 Daimler Chrysler Ag Einrichtung und Verfahren zum Stromrichter-Überlastschutz
DE112018008205T5 (de) * 2018-12-13 2021-09-02 Kabushiki Kaisha Toshiba Energieversorgungssystem und Energieversorgungsverfahren

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EP0255505A1 (fr) * 1986-07-29 1988-02-03 GEC ALSTHOM T&D GESELLSCHAFT m.b.H. Dispositif de commande et de surveillance pour une installation de distribution de puissance électrique
JPH0646525A (ja) * 1991-12-27 1994-02-18 Takenaka Komuten Co Ltd インバータ配電系統の保護方法

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Publication number Priority date Publication date Assignee Title
EP0255505A1 (fr) * 1986-07-29 1988-02-03 GEC ALSTHOM T&D GESELLSCHAFT m.b.H. Dispositif de commande et de surveillance pour une installation de distribution de puissance électrique
JPH0646525A (ja) * 1991-12-27 1994-02-18 Takenaka Komuten Co Ltd インバータ配電系統の保護方法

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PATENT ABSTRACTS OF JAPAN vol. 018, no. 275 (E - 1553) 25 May 1994 (1994-05-25) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102457198A (zh) * 2012-01-16 2012-05-16 中钢集团天澄环保科技股份有限公司 电除尘器高压电源
WO2018218862A1 (fr) * 2017-05-31 2018-12-06 广船国际有限公司 Procédé et dispositif de vérification de performance de régulation de tension, et système de réseau électrique de navire
CN111337772A (zh) * 2020-03-18 2020-06-26 无锡赛思亿电气科技有限公司 多功能负载电路变频器试验平台及其实验方法
CN114421442A (zh) * 2022-01-18 2022-04-29 山东鲁软数字科技有限公司智慧能源分公司 一种智能并网开关及电网保护装置

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Publication number Publication date
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