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EP4392793A1 - Système et procédé de système de commutateur de transfert hybride partagé à auto-test de relais intégré - Google Patents

Système et procédé de système de commutateur de transfert hybride partagé à auto-test de relais intégré

Info

Publication number
EP4392793A1
EP4392793A1 EP22861858.3A EP22861858A EP4392793A1 EP 4392793 A1 EP4392793 A1 EP 4392793A1 EP 22861858 A EP22861858 A EP 22861858A EP 4392793 A1 EP4392793 A1 EP 4392793A1
Authority
EP
European Patent Office
Prior art keywords
relay
power source
load
primary
preferred
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
EP22861858.3A
Other languages
German (de)
English (en)
Inventor
Scott Cooper
Kevin R. Ferguson
Grant Young
Anthony Bryan Mcdonald
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.)
Vertiv Corp
Original Assignee
Vertiv Corp
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
Priority claimed from US17/459,837 external-priority patent/US12061235B2/en
Application filed by Vertiv Corp filed Critical Vertiv Corp
Publication of EP4392793A1 publication Critical patent/EP4392793A1/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
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
    • G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/018—Application transfer; between utility and emergency power supply
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
    • H01H9/541—Contacts shunted by semiconductor devices
    • H01H9/542—Contacts shunted by static switch means
    • 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
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/10—The network having a local or delimited stationary reach
    • H02J2310/12—The local stationary network supplying a household or a building
    • H02J2310/16—The load or loads being an Information and Communication Technology [ICT] facility

Definitions

  • the transfer switch is manufactured in a variety of physical forms, performance capabilities, and range of ampacities for single and three-phase power distribution.
  • the transfer switch is preferably located within an equipment rack (i.e., within the rack “space”). It supplies input either directly to IT equipment, via its own receptacles, or to other rack power distribution equipment (e.g., power strips).
  • a shared transfer switching system with built in relay testing ability, for transferring power received by a load from a preferred AC power source to an alternate AC power source, or transferring power being received by the load from the alternate AC power source to the preferred AC power source.
  • the shared transfer switching system may comprise one first primary relay and one first secondary relay coupled in series, and in series with a preferred power source and a load, to enable the load to be powered by the preferred power source.
  • the system may also include one second primary relay and one second secondary relay coupled in series, and also in series with an alternate power source and with the load, for providing power from the alternate power source to the load when the preferred power source is not available to power the load.
  • the system may also include a controller for controlling operation of the second primary relay and the second secondary relay, and a switching subsystem.
  • the switching subsystem may be in communication with the controller and the first primary relay, the first secondary relay, the second primary relay, the second secondary relay, and the load.
  • the switching subsystem may be configured to be controlled by the controller to control a switch over from one or the other of the preferred or alternate power sources to the load.
  • the system may also include a relay test subsystem including a relay test software module and a voltage detection subsystem operably associated with the controller for carrying out a relay test process.
  • the relay test process includes performing a plurality of voltage tests by selectively opening and closing the second primary relay and the second secondary relay to verify proper operation of the second primary relay and the second secondary relay.
  • Figure 1 is a diagram of one embodiment of a shared, hybrid transfer switch system coupled to a first (preferred) power source and a second (alternate) power source.
  • the switching topology is symmetrical on both sides of the load, so only one side is illustrated to not clutter the drawing;
  • Figure 2 shows the system of Figure 1 with the various relay contacts in the positions they assume when the system is in a steady state of operation receiving power from a first power source;
  • Figure 3 shows how specific relays are controlled during a first intermediate step of a switching sequence in switching the load from the first power source to the second power source for an open transition, in which one of the relay contacts associated with the preferred power source is initially opened, to momentarily interrupt power to the Load;
  • Figure 8 shows an embodiment of the system configured to handle a single phase AC power source
  • Figure 10 shows an embodiment of the system configured to handle a 3-phase wye configured AC power source
  • Figure 11 shows another embodiment of the system of Figure 1 which incorporates a relay test feature for testing the various relays of the system without the need to interrupt power from the preferred power source;
  • a thermistor 30, in this example a NTC thermistor, is coupled between one side of the SCR pair 24 and the first common connection point 14c, and forms a current limiter to mitigate contact current overload when the anti-parallel SCR pair 24 is turned on during a transition operation.
  • the Load may be one or more devices or subsystems requiring AC power for operation, for example one or more servers, network switches, power distribution units (PDUs), or virtually any other component that requires AC power for its operation.
  • the system 10 may be located within a suitable housing (not shown) and mounted in a data center equipment rack, and may incorporate one or more AC receptacles (not shown) for supplying AC power directly to other devices and components.
  • Figure 3 shows the first operation in switching to power from the alternate power source 28.
  • the system 10, again, in this example is configured as a “break before make” system, although it is possible to control the system 10 such that it operates as a “make before break” switching system. It is expected, however, that the “break before make” control scheme will be the more preferred control configuration.
  • Figure 4 shows the next operation in which either the SCR 24a or the SCR 24b of the SCR pair 24 is then triggered on by the controller 12. It should be understood that the two SCRs in the SCR pair 24 do not both conduct simultaneously when triggered on by the controller 12. One of the SCRs conducts during the positive quadrant of the sinusoid, and the other conducts during the negative quadrant of the sinusoid. Thus the SCRs 24a and 24b conduct alternately as the sinusoid alternates positive and negative. All of the relay contacts 14a, 14b, 16, 18, 20 and 22 remain in the same state as shown in Figure 3.
  • Figure 6 shows the next operation in which the anti-parallel SCR pair 24 is no longer triggered by the controller 12 and naturally commutates off, relay contact 14b is opened and relay contact 14a is closed.
  • This final configuration of the relays 14a and 14b shown in Figure 6 prepares the system 10 for the next transition in the event the preferred power source 26 is re-selected as the power source for the system 10.
  • the anti-parallel SCR pair 24 is no longer triggered by the controller and naturally commutates off.
  • Arrow 120 represents the total time duration during which one of the SCRs of the anti-parallel SCR pair 24 is conducting and supplying current to the Load
  • arrow 122 indicates the total overlap time during which one of the SCRs of the anti-parallel SCR pair 24 is connected in parallel with the relay contact 18.
  • the total time that the Load experiences no power being supplied is only 5ms, which is well within the desired timeframe of 8ms or less at a 60Hz line frequency as specified by the ITIC curve developed by the Information Technology Industry Council.
  • Figure 8 shows a system 200 in accordance with the present disclosure configured to implement a single phase topology.
  • essentially two iterations of the system 10 are incorporated, with each pair of relays 14a, 14b, 20 and 22 being respectively controlled together.
  • Figure 9 shows a system 300 in accordance with the present disclosure configured to implement a 3-phase delta topology.
  • One instance of the system 10 is used for controlling transitions from each of the X, Y and Z phases 26x/26y/26z of a preferred power source to the X, Y and Z phases 28x/28y/28z of an alternate power source.
  • Figure 10 shows a system 400 in accordance with the present disclosure configured to implement a 3-phase wye topology.
  • four instances of the system 10 are used to control transitions from each one of the preferred power phases X, Y and Z (labelled 26x, 26y, 26z), and the Neutral, and the alternate power source phases X, Y and Z (labelled 28x, 28y and 28z), and the Neutral line.
  • the relay contacts 20 of the two instances of the system 10 associated with the X and Y phases are switched together, and the relay contacts 20 of the two instances of the system 10 associated with the Y phase and the Neutral line are switched together.
  • the relay contacts 14a, 14b and 22 are handled in the same fashion.
  • the various embodiments of the system 10 presented herein may also be implemented in a “make before break” (“closed transition”) configuration.
  • the source voltages phasing may be unsynchronized or synchronized, with the latter condition required for the “closed transition” configuration.

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Direct Current Feeding And Distribution (AREA)

Abstract

La présente divulgation se rapporte à un système de commutation de transfert partagé doté d'une capacité de test de relais intégrée, permettant de transférer une puissance reçue par une charge depuis une source d'alimentation CA préférée vers une autre source d'alimentation CA, ou de transférer une puissance reçue par la charge depuis l'autre source d'alimentation CA vers la source d'alimentation CA préférée. Le système commande sélectivement divers relais parmi les relais utilisés pour appliquer la puissance depuis la source d'alimentation préférée ou l'autre source d'alimentation vers la charge, de telle sorte que les relais sont commutés d'un état ouvert à un état fermé à des moments contrôlés, pendant la réalisation de mesures de tension à des emplacements sélectionnés entre les relais. Le système peut identifier quels relais spécifiques parmi une pluralité de relais associés à chaque source de la source d'énergie préférée et de l'autre source d'énergie ont été correctement ouverts et fermés, et ainsi vérifier que tous les relais nécessaires pour commuter entre la source d'alimentation préférée et l'autre source d'alimentation fonctionnent correctement.
EP22861858.3A 2021-08-27 2022-06-28 Système et procédé de système de commutateur de transfert hybride partagé à auto-test de relais intégré Pending EP4392793A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US17/459,837 US12061235B2 (en) 2019-05-06 2021-08-27 System and method for shared hybrid transfer switch system with integrated relay self test
PCT/US2022/035213 WO2023027803A1 (fr) 2021-08-27 2022-06-28 Système et procédé de système de commutateur de transfert hybride partagé à auto-test de relais intégré

Publications (1)

Publication Number Publication Date
EP4392793A1 true EP4392793A1 (fr) 2024-07-03

Family

ID=85323112

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22861858.3A Pending EP4392793A1 (fr) 2021-08-27 2022-06-28 Système et procédé de système de commutateur de transfert hybride partagé à auto-test de relais intégré

Country Status (3)

Country Link
EP (1) EP4392793A1 (fr)
CN (1) CN118103719A (fr)
WO (1) WO2023027803A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7405910B2 (en) * 2005-11-30 2008-07-29 Electric Power Research Institute, Inc. Multifunction hybrid solid-state switchgear
KR101079900B1 (ko) * 2007-10-31 2011-11-04 주식회사 케이티 선택스위치 장치, 이를 이용한 전원공급장치 및 그 스위칭 방법
US9754745B2 (en) * 2010-11-01 2017-09-05 Raritan Americas, Inc. Methods and apparatus for improved relay control
US9484771B2 (en) * 2013-11-01 2016-11-01 Juniper Networks, Inc. Uninterruptable power supply for device having power supply modules with internal automatic transfer switches
US12061235B2 (en) * 2019-05-06 2024-08-13 Vertiv Corporation System and method for shared hybrid transfer switch system with integrated relay self test
US11171508B2 (en) * 2019-05-06 2021-11-09 Vertiv Corporation System and method for shared hybrid transfer switch

Also Published As

Publication number Publication date
WO2023027803A1 (fr) 2023-03-02
CN118103719A (zh) 2024-05-28

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