WO2021109833A1 - Dispositif portable de détection automatique de séquence de phase - Google Patents

Dispositif portable de détection automatique de séquence de phase Download PDF

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Publication number
WO2021109833A1
WO2021109833A1 PCT/CN2020/128529 CN2020128529W WO2021109833A1 WO 2021109833 A1 WO2021109833 A1 WO 2021109833A1 CN 2020128529 W CN2020128529 W CN 2020128529W WO 2021109833 A1 WO2021109833 A1 WO 2021109833A1
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WIPO (PCT)
Prior art keywords
phase
phase sequence
circuit breaker
interface
output
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PCT/CN2020/128529
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English (en)
Chinese (zh)
Inventor
胡德敏
陈允柯
袁玉柱
邓浩杰
宋树军
王滕
李培启
Original Assignee
徐州海伦哲特种车辆有限公司
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Application filed by 徐州海伦哲特种车辆有限公司 filed Critical 徐州海伦哲特种车辆有限公司
Publication of WO2021109833A1 publication Critical patent/WO2021109833A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/18—Indicating phase sequence; Indicating synchronism

Definitions

  • the invention relates to a power device, in particular to a portable automatic phase sequence detection device.
  • emergency equipment generally uses its own cable to directly connect to the low-voltage power grid interface for power supply. Since the phase sequence detection is not performed before power supply, the output power phase sequence is often inconsistent with the user power grid power phase sequence, resulting in user three-phase equipment (such as Elevators, lathes, etc.) cannot be used or work in reverse, which may even cause accidents and endanger personal safety.
  • phase sequence detection In order to avoid the inconsistency of the phase sequence when the emergency equipment is powered, the phase sequence must be checked before the power is supplied.
  • phase sequence detection There are two existing methods for phase sequence detection: one is to use a phase sequence table for manual detection, and the other is to configure an automatic phase verification device for emergency equipment.
  • the first method It can be carried out by using a phase sequence table.
  • the advantage is that the investment is less and the applicability is strong.
  • this method requires the operator to hold the phase sequence table in contact with the 400V power supply, and the personal safety of the operator cannot be obtained. Guarantee, and the operation steps are cumbersome and the reliability is not high. Once the manual judgment is wrong, the consequences will be serious.
  • the second method generally install an automatic phase verification device inside the vehicle, and the automatic phase verification is generally realized by installing a simple generalized electric bridge or directly installing a phase verification instrument.
  • Chinese patent CN204330898U discloses a low-voltage nuclear phase system of a bypass mobile box-change emergency repair vehicle. The technical description adopts the principle of current balance and carries a generalized bridge to realize a low-voltage nuclear phase system. The system adjusts the adjustable resistance on site. Observe the current value to determine the phase situation.
  • the mobile box-transformation vehicle with automatic phase verification system disclosed in Chinese patent CN201937193U, the mobile box-transformation vehicle directly connects the low-voltage power supply and the power supply of the distribution transformer to the phase meter, and the phase meter judges the phase.
  • phase verification and automatic switching of the mobile box-transformation vehicle are realized, and the on-site manual phase verification and switching operations are avoided.
  • the phase meter can only detect the phase angle, that is to say, the phase verification method can only be used to determine whether the three-phase power phases of the same group of transformers in the same line are the same.
  • the phase sequence of the phase power supply cannot be judged, and it is also not applicable to the phase sequence detection of emergency equipment and low-voltage power grids.
  • the low-voltage power grid has a variety of interfaces, such as low-voltage switchgear busbars, overhead lines, and various types of quick connectors.
  • emergency equipment is generally equipped with only one type of interface cable, which can only meet the interface requirements of a small number of low-voltage power grids.
  • the existing solution is to carry out on-site restructuring of the emergency equipment's own cables, which not only takes time and effort, but also causes damage and waste to the own cables. If multiple cable interfaces are configured, a large number of cables need to be configured, resulting in repeated purchases of cables and wasting a lot of economic resources.
  • the above problems have severely restricted the development of emergency equipment, and at the same time, they have also had a huge impact on the improvement of electricity reliability.
  • the present invention discloses a portable automatic phase sequence detection device.
  • the device first uses a power control relay to detect the phase sequence category of the three-phase power supply of different lines or different groups of transformers, and then uses the power control relay to connect in reverse phase. Comparing the above phase sequence categories can reliably detect whether the phase sequence of any low-voltage power supply is the same. It not only solves the problems of limited use range and low reliability of the automatic phase nuclear device in the prior art, but also solves the problems of low safety and cumbersome operation of manual phase sequence detection, and provides a guarantee for the safe and fast power supply of emergency equipment.
  • a portable automatic phase sequence detection device which includes a box, a circuit breaker, a cable interface, an opening and closing switch, and an automatic phase sequence detection system.
  • the automatic phase sequence detection system includes a phase sequence detection switch, The first relay, the same phase sequence indicator, the different phase sequence indicator, and two groups of power control relays; each group of two power control relays, respectively connected to the input and output of the circuit breaker, two groups of power control relays and circuit breaker
  • the connection phase sequence of the input end and the output end of the relay is opposite; a group of normally open contacts of the same group of two power control relays are connected in series, and two groups of power control relays are connected in series and connected in parallel.
  • the first relay includes two groups of normally open contacts and a group of normally closed contacts, one group of normally open contacts is connected to an indicator lamp with the same phase sequence, and the other group is connected to
  • the opening and closing switches are connected in series, and a group of normally closed contacts is connected to the indicator lamps with different phase sequence.
  • the two groups and four power control relays are respectively a first power control relay, a second power control relay, a third power control relay, and a fourth power control relay;
  • the power A phase, B phase, and B phases of the first power control relay are Phase C is connected to phase A, phase B, and phase C of the circuit breaker input terminal, and phase A, phase B, and phase C of the power supply of the second power control relay are connected to phase C, phase B, and phase A of the circuit breaker input terminal, and the third power source
  • the power supply A phase, B phase, C phase of the control relay is connected with the circuit breaker output terminal A phase, B phase, C phase, and the power supply A phase, B phase, C phase of the fourth power control relay is connected with the circuit breaker output terminal C phase, Phase B and Phase A are connected.
  • the circuit breaker includes a circuit breaker body, a circuit breaker closing mechanism, and a circuit breaker opening mechanism, and the opening and closing switches are respectively connected to the circuit breaker closing mechanism and the circuit breaker opening mechanism.
  • the cable interface is installed on both sides of the box and includes an input cable interface and an output cable interface.
  • the input cable interface includes an input N-phase interface and an input A connected to the A-phase, B-phase, and C-phase terminals of the input terminal of the circuit breaker, respectively.
  • Phase interface, input phase B interface, input phase C interface; the output cable interface includes output N phase interface and output phase A interface and output phase B interface which are respectively connected to the A phase, B phase and C phase terminals of the output terminals of the circuit breaker , Output C-phase interface, the input N-phase interface is connected with the output N-phase interface.
  • the input cable interface is a quick connector or a copper bar
  • the output cable interface is a quick connector
  • the cable interface and the circuit breaker are connected by a cable or a copper bar.
  • the output cable interface is connected with a transition cable, one end of the transition cable is a quick connector connected to the output cable interface, and the other end is equipped with a variety of interface forms that can be matched with various interfaces of the low-voltage power distribution network .
  • the interface configured at one end of the transition cable connected to the low-voltage power distribution network is in the form of a copper terminal, a quick connector, or a drain clamp.
  • the device further includes a voltage and current display device, the voltage and current display device includes a current signal detection device installed on the cable or copper bar connected to the cable interface and the circuit breaker, and used to display voltage, current, power, and frequency. Power multi-function meter.
  • the device further includes a quasi-synchronization controller for comparing voltage amplitude and phase angle.
  • the device further includes a power detection port, the power detection port includes an input power detection port and an output power detection port, the input power detection port is connected to the input end of the circuit breaker, and the output power detection port is connected to the circuit breaker output end Connected, the electrical inspection port is provided with insulation protection and an electric shock prevention structure.
  • the box body includes a box body, a handle, a door lock with a fingerprint recognition function, and a universal wheel, and the box body has a double-layer door structure.
  • the advantages of the portable automatic phase sequence detection device disclosed in the present invention are:
  • the present invention first uses the power control relay to detect the phase sequence category of the three-phase power supply of different lines or different groups of transformers, and then compares the above phase sequence categories through the power control relay reverse connection method, which can reliably detect Whether the phase sequence of any low-voltage power supply is the same. It not only solves the problem that the automatic phase verification device in the prior art can only detect whether the three-phase power phases and reliability of the same group of transformers in the same line are the same, but also solves the problems of low safety and cumbersome operation of manual phase sequence detection It provides a guarantee for the safe and fast power supply of emergency equipment.
  • the present invention is equipped with a cable interface and a transfer cable.
  • the emergency equipment can be easily and quickly connected to the low-voltage power grid by using its own cable, which solves the problems of on-site restructuring of emergency equipment cables and repeated purchases of cables, saving a lot of manpower, Material resources.
  • the three-phase power supply controller in the automatic phase sequence detection system of the present invention has the functions of phase loss protection and undervoltage protection. Only when the input and output two power supplies are completely normal and the phase sequence is consistent, the phase sequence consistent signal can be output. It not only ensures the accuracy of the phase sequence detection results, but also ensures the reliability of the emergency equipment power supply.
  • Fig. 1 is a structural schematic diagram 1 of a portable automatic phase sequence detection device disclosed in the present invention.
  • Fig. 2 is a schematic structural diagram 2 of a portable automatic phase sequence detection device disclosed in the present invention.
  • Fig. 3 is a schematic circuit diagram of a portable automatic phase sequence detection device disclosed in the present invention.
  • Fig. 4 is a logical block diagram of a portable automatic phase sequence detection device disclosed in the present invention.
  • Figures 1 to 4 show preferred embodiments of the present invention, which are analyzed in detail from different angles.
  • a portable automatic phase sequence detection device as shown in Figures 1 and 2 includes a box body 1, a circuit breaker 2, a cable interface 4, an opening and closing switch 5, and an automatic phase sequence detection system 3.
  • the box 1 includes a box body 102, a handle 104, a door lock 103 with fingerprint recognition function, and a universal wheel 101.
  • the box body 102 has a double-layer door structure, which effectively isolates the automatic phase sequence detection and synchronization cable transfer box
  • the electrified part avoids the problem that the operator accidentally touches the electrified body and causes the operator to get an electric shock, and ensures the safety of the operator when the emergency equipment is connected to the user.
  • the universal wheel 101 and the handle 104 are installed at the bottom of the box body 1 and the volume is small, it is easy to access and move, which can meet the space requirements of various working conditions.
  • the circuit breaker 2 is installed in the box 1 and includes the circuit breaker body 201, the circuit breaker closing mechanism 202, and the circuit breaker opening mechanism 203.
  • the opening and closing switch 5 is respectively connected with the circuit breaker closing mechanism 202 and the circuit breaker opening mechanism 203. connection.
  • the cable interface 4 is installed on both sides of the box 1, with insulation protection, including an input cable interface and an output cable interface.
  • the input cable interface includes an input N-phase interface 404 and the A-phase, B-phase, and C-phase terminals of the input terminal of the circuit breaker 2 respectively.
  • the input phase A interface 401, the input phase B interface 402, and the input phase C interface 403 are connected.
  • the output cable interface includes an output N-phase interface 408 and an output A-phase interface 405, an output B-phase interface 406, an output C-phase interface 407, and an input N-phase interface respectively connected to the A-phase, B-phase, and C-phase terminals of the output terminals of the circuit breaker 2 404 is connected to the output N-phase interface 408.
  • the input cable interface is a quick connector or copper bar
  • the output cable interface is a quick connector.
  • the cable interface 4 and the circuit breaker 2 are connected by cables or copper bars.
  • the output cable interface is connected with a transfer cable 8.
  • One end of the transfer cable 8 is a quick connector connected to the output cable interface, and the other end is equipped with a variety of interface forms that can be matched with various interfaces of the low-voltage power distribution network.
  • the specific interface form is Copper terminals or quick connectors or drain clamps.
  • the automatic phase sequence detection system 3 includes a phase sequence switch 306, a first power control relay 302, a second power control relay 303, a third power control relay 304, a fourth power control relay 305, and a first relay. 301.
  • the power A phase, B phase, and C phase of the first power control relay 302 are respectively connected to the A phase, B phase, and C phase of the input terminal of the circuit breaker 2; the power A phase, B phase, and C phase of the second power control relay 303 are respectively connected It is connected to the input terminals of circuit breaker 2 with phase C, phase B, and phase A; the power source A phase, phase B, and phase C of the third power supply control relay 304 are connected with phase A, phase B, and phase C of the output terminal of circuit breaker 2 respectively;
  • the power A phase, B phase, and C phase of the four power source control relay 305 are respectively connected to the C phase, B phase, and A phase of the output terminal of the circuit breaker 2.
  • a group of normally open contacts of the first power control relay 302 is connected in series with a group of normally open contacts of the third power control relay 304, and a group of normally open contacts of the second power control relay 303 is connected in series with the fourth power control relay 304.
  • a group of normally open contacts are connected in series, and the two groups of power control relays are connected in series and then connected in parallel as a whole.
  • the coil of the first relay 301 is connected to the other end of the normally open contact of the third power control relay 304 and the normally open contact of the fourth power control relay 305 respectively. Connect the other end of the opening.
  • the first relay 301 includes two groups of normally open contacts and a group of normally closed contacts. One group of normally open contacts is connected with the same phase sequence indicator 307, the other group is connected in series with the opening and closing switch 5, and a group of normally closed contacts is connected in series. The point is connected to the indicator light 308 with a different phase sequence.
  • the device also includes a voltage and current display device 6.
  • the voltage and current display device 6 includes a current signal detection device 602 installed on the cable or copper bar connecting the cable interface 4 and the circuit breaker 2 and used to display voltage, current, and power. 601, frequency power multi-function meter.
  • the device also includes a quasi-synchronous controller 309 for comparing voltage amplitude and phase angle, which provides conditions for parallel operation of mobile box-transformation vehicles and low-voltage cable cars with users, and greatly improves power supply reliability.
  • the device also includes an electrical inspection port 7.
  • the electrical inspection port 7 includes an input electrical inspection port and an output electrical inspection port, the input electrical inspection port is connected to the input end of the circuit breaker 2, and the output electrical inspection port is connected to the output end of the circuit breaker 2.
  • the electrical inspection port 7 is equipped with insulation protection and electric shock prevention structure.
  • using the above-mentioned portable automatic phase sequence detection device to perform operations includes the following steps:
  • the first power control relay 302 and the third power control relay 304 act, and the corresponding normally open contacts are closed.
  • the phase sequence is the same, and the first relay 301
  • the indicator light 307 works, and the circuit breaker 2 is allowed to close. Operate the opening and closing switch 5, the circuit breaker closing mechanism 202 is energized, the circuit breaker 2 is closed, and the emergency equipment power is transmitted to the low-voltage power distribution network;
  • the first power control relay 302 and the fourth power control relay 305 will act, and the corresponding normally open contacts will be closed.
  • the phase sequence is different, the first relay 301 does not work, the phase sequence is different, the indicator light 308 works, and the circuit breaker 2 is prohibited from closing.
  • swap any two phases at one end of the connecting cable 8 and the output cable interface and perform automatic phase sequence detection again;
  • the second power control relay 303 and the third power control relay 304 act, and the corresponding normally open contacts are closed.
  • the phase sequence is different, and the first relay 301 does not work, the phase sequence is different, the indicator light 308 works, and the circuit breaker 2 is prohibited from closing.
  • swap any two phases at one end of the connecting cable 8 and the output cable interface and perform automatic phase sequence detection again;
  • the second power control relay 303 and the fourth power control relay 305 will act, and the corresponding normally open contacts will be closed.
  • the phase sequence is the same, and the first relay 301 will be energized.
  • the phase sequence is the same, the indicator light 307 works, and the circuit breaker 2 is allowed to close.
  • the opening and closing switch 5 By operating the opening and closing switch 5, the circuit breaker closing mechanism 202 is energized, the circuit breaker 2 is closed, and the emergency equipment power supply is transmitted to the low-voltage power distribution network.
  • the portable automatic phase sequence detection device disclosed in the present invention first uses a power control relay to detect the phase sequence category of the three-phase power supply of different lines or different groups of transformers, and then conducts the reverse connection of the power control relay. Comparing the above phase sequence categories can reliably detect whether the phase sequence of any low-voltage power supply is the same. It not only solves the problem that the automatic phase verification device in the prior art can only detect whether the three-phase power phases and reliability of the same group of transformers in the same line are the same, but also solves the problems of low safety and cumbersome operation of manual phase sequence detection It provides a guarantee for the safe and fast power supply of emergency equipment.
  • the phase sequence detection device is also equipped with a cable interface and a transfer cable. The emergency equipment can be easily and quickly connected to the low-voltage power grid by using its own cable, which solves the problems of the emergency equipment cable site modification and the repeated purchase of cables, saving a lot of money Human and material resources.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

La présente invention concerne un dispositif portable de détection automatique de séquence de phase, appartenant au domaine technique des installations électriques. Un système de détection automatique de séquence de phase (3) dans le dispositif de détection de séquence de phase comprend un commutateur de détection de séquence de phase (306), un premier relais de commande d'alimentation électrique (302), un deuxième relais de commande d'alimentation électrique (303), un troisième relais de commande d'alimentation électrique (304), un quatrième relais de commande d'alimentation électrique (305), un premier relais (301), une lampe témoin de cohérence de séquence de phase (307) et une lampe témoin d'incohérence de séquence de phase (308). Le dispositif de détection de séquence de phase utilise tout d'abord les relais de commande d'alimentation électrique (302, 303, 304, 305) pour détecter des types de séquence de phase d'alimentations électriques triphasées de transformateurs dans différents circuits ou différents groupes, puis compare les types de séquence de phase susmentionnés au moyen de connexions à inversion de phase des relais de commande d'alimentation électrique (302, 303, 304, 305), ce qui permet d'obtenir une détection fiable de la cohérence des séquences de phase de n'importe quelles alimentations électriques basse tension. L'invention résout le problème de l'état de la technique selon lequel des dispositifs de vérification automatique de phase présentent une plage d'application limitée et une faible fiabilité, et résout également les problèmes selon lesquels la sécurité est mauvaise et les opérations sont fastidieuses lors d'une détection manuelle de séquence de phase, ce qui permet d'assurer une alimentation électrique sûre et rapide d'appareils d'urgence.
PCT/CN2020/128529 2019-12-03 2020-11-13 Dispositif portable de détection automatique de séquence de phase WO2021109833A1 (fr)

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CN110780127A (zh) * 2019-12-03 2020-02-11 徐州海伦哲特种车辆有限公司 一种便携式自动检相序装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106291141A (zh) * 2016-08-30 2017-01-04 中国能源建设集团江苏省电力建设第工程有限公司 施工现场三相电源相序自动识别装置
CN206020544U (zh) * 2016-08-30 2017-03-15 中国能源建设集团江苏省电力建设第一工程有限公司 施工现场三相电源相序自动识别装置
CN206806982U (zh) * 2017-05-23 2017-12-26 广西真龙实业有限责任公司 一种三相四线电源缺相与相序保护报警装置
US20180067172A1 (en) * 2016-09-06 2018-03-08 Littelfuse, Inc. Zero sequence sensing apparatus and method
CN110780127A (zh) * 2019-12-03 2020-02-11 徐州海伦哲特种车辆有限公司 一种便携式自动检相序装置
CN211627693U (zh) * 2019-12-03 2020-10-02 徐州海伦哲特种车辆有限公司 一种便携式自动检相序装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1363367A1 (ru) * 1986-04-07 1987-12-30 Предприятие П/Я Р-6758 Устройство дл контрол чередовани фаз в трехфазной сети
CN101872960A (zh) * 2010-06-01 2010-10-27 佛山市中格威电子有限公司 一种相序检测、调整方法及电路

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106291141A (zh) * 2016-08-30 2017-01-04 中国能源建设集团江苏省电力建设第工程有限公司 施工现场三相电源相序自动识别装置
CN206020544U (zh) * 2016-08-30 2017-03-15 中国能源建设集团江苏省电力建设第一工程有限公司 施工现场三相电源相序自动识别装置
US20180067172A1 (en) * 2016-09-06 2018-03-08 Littelfuse, Inc. Zero sequence sensing apparatus and method
CN206806982U (zh) * 2017-05-23 2017-12-26 广西真龙实业有限责任公司 一种三相四线电源缺相与相序保护报警装置
CN110780127A (zh) * 2019-12-03 2020-02-11 徐州海伦哲特种车辆有限公司 一种便携式自动检相序装置
CN211627693U (zh) * 2019-12-03 2020-10-02 徐州海伦哲特种车辆有限公司 一种便携式自动检相序装置

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