WO2024252685A1 - Dispositif de contre-mesure de surtension atmosphérique et système d'alimentation électrique - Google Patents

Dispositif de contre-mesure de surtension atmosphérique et système d'alimentation électrique Download PDF

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Publication number
WO2024252685A1
WO2024252685A1 PCT/JP2023/021616 JP2023021616W WO2024252685A1 WO 2024252685 A1 WO2024252685 A1 WO 2024252685A1 JP 2023021616 W JP2023021616 W JP 2023021616W WO 2024252685 A1 WO2024252685 A1 WO 2024252685A1
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WO
WIPO (PCT)
Prior art keywords
impedance
power supply
supply system
lightning
positive
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
PCT/JP2023/021616
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English (en)
Japanese (ja)
Inventor
尚倫 中村
直樹 花岡
裕二 樋口
裕志 砂田
徹 田中
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.)
NTT Inc
Original Assignee
Nippon Telegraph and Telephone 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
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP2025525926A priority Critical patent/JPWO2024252685A1/ja
Priority to PCT/JP2023/021616 priority patent/WO2024252685A1/fr
Publication of WO2024252685A1 publication Critical patent/WO2024252685A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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    • 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
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage

Definitions

  • the present invention relates to technology for protecting DC power supply systems against lightning surges.
  • an SPD Sudge protective device
  • varistor zinc oxide varistor
  • surge protection devices may also be called lightning arresters.
  • Non-Patent Document 1 For example, by installing the varistor described in Non-Patent Document 1 between the positive and ground electrodes of a DC power supply system, and between the negative and ground electrodes, it is possible to dissipate lightning surges that enter through cables connected to the DC power supply system to the ground via the varistor.
  • the present invention was made in consideration of the above points, and aims to improve the effectiveness of measures against lightning surges in DC power supply systems.
  • a lightning surge protection device for use in a DC power supply system, comprising: a first impedance section for increasing the impedance of one of the positive and negative polarities; A positive lightning arrester; A negative lightning arrester; There is provided a lightning surge protection device comprising:
  • the disclosed technology makes it possible to improve the effectiveness of measures against lightning surges in DC power supply systems.
  • FIG. 13 is a diagram showing a configuration example of a power supply system including a varistor as a measure against a lightning surge.
  • FIG. 1 is a diagram for explaining a problem.
  • FIG. 1 is a diagram for explaining a problem.
  • FIG. 1 is a diagram for explaining a problem.
  • 1 is a diagram illustrating a first configuration example of a power supply system according to an embodiment of the present invention.
  • FIG. 11 is a diagram illustrating a second configuration example of a power supply system according to an embodiment of the present invention.
  • 1 is a diagram illustrating an example of the configuration of a lightning surge protection device 100.
  • FIG. 1 is a diagram for explaining a problem.
  • Fig. 1 shows an example of the configuration of a power supply system that includes a varistor as a countermeasure against lightning surges.
  • a varistor 22 is installed between the positive pole (any point on the cable on the positive pole side) and the ground pole, and a varistor 21 is installed between the negative pole (any point on the cable on the positive pole side) and the ground pole. This makes it possible for a lightning surge that has entered through the cable to escape to the ground via varistors 21 and 22.
  • a diode 12 connected to an internal circuit 11 in a DC power supply system 10 is shown.
  • the diode 12 is one of the internal circuits in the DC power supply system 10.
  • the diode 12 may be described as the "internal circuit 12.”
  • the internal circuit 11 and the diode 12 may be collectively referred to as the "internal circuit.”
  • the anode of the diode 12 is connected to the negative electrode, and the cathode is connected to the positive electrode.
  • the common mode choke coil 30 disclosed in Non-Patent Document 2 can be placed between the internal circuit 12 and the varistors 21, 22 to make the varistors 21, 22 operate effectively.
  • the effect cannot be obtained unless the lightning surge penetrates not only the positive cable but also the negative cable.
  • FIG. 5 shows a first configuration example of the power supply system according to the present embodiment.
  • an impedance unit 23 is added between the positive electrode and the ground electrode to the configuration shown in Fig. 2.
  • the DC power supply system 10 includes a diode 12 (internal circuit 12).
  • a positive cable and a negative cable extend from the DC power supply system 10.
  • a varistor 22 is provided between the positive electrode and the ground electrode, a varistor 21 is provided between the negative electrode and the ground electrode, and an impedance unit 23 is provided between the positive electrode and the ground electrode.
  • the impedance unit 23 is provided between the positive electrode and the varistor 22, but the impedance unit 23 may be provided between the varistor 22 and the ground electrode.
  • the configuration (part) including the varistors 21, 22 and the impedance section 23 is called the lightning surge protection device 100.
  • the impedance section 23 may be of any type as long as it has the function of increasing the impedance on the positive electrode side. "Increasing the impedance on the positive electrode side” means making the “impedance on the positive electrode side when the impedance section 23 is present” higher than the "impedance on the positive electrode side when the impedance section 23 is not present.” In addition, the "impedance on the positive electrode side” is, for example, the impedance between the positive electrode and the ground electrode.
  • the impedance unit 23 is an element that increases the impedance.
  • the element is, for example, a resistor, a coil, or both a resistor and a coil.
  • the impedance section 23 may be configured to increase the impedance by modifying the circuit pattern.
  • Deforming the circuit pattern may mean, for example, narrowing the board circuit pattern on the positive side (i.e., reducing the width of the conductors that make up the pattern), lengthening the board circuit pattern (increasing the length of the conductors that make up the pattern), or making the conductors zigzag or U-shaped while ensuring sufficient separation between the conductors in the board circuit pattern.
  • circuit pattern is the circuit pattern electrically connected between the positive electrode and the ground electrode in Figure 5.
  • the cable for connecting the varistor 22 between the positive electrode and the ground electrode may be thinned, or the shape of the cable may be coiled. Methods other than these may be used as long as they can realize the impedance section 23.
  • the provision of the impedance section 23 makes it difficult for a lightning surge entering from the negative side to flow through the inside of the DC power supply system 10 and from the varistor 22 on the positive side to ground.
  • the magnitude of the impedance in the impedance section 23 can be set taking into consideration the dielectric strength (voltage) or current withstand capacity between the positive and negative electrodes.
  • the impedance unit 23 is provided on the positive side, but this is just one example. Depending on the asymmetric characteristics of the internal circuit, the impedance unit may be provided on the negative side instead of the positive side.
  • FIG. 6 shows a second example of the system configuration according to the present embodiment.
  • the second example of the system configuration is a configuration in which an impedance unit 24 for increasing the impedance on the negative electrode side (the impedance between the negative electrode and the ground electrode) is added between the negative electrode and the ground electrode to the first example of the system configuration (Fig. 5).
  • the method of realizing impedance unit 24 is the same as the method of realizing impedance unit 23, as described in configuration example 1.
  • an element may be used as impedance unit 24, a modified circuit pattern may be used, a modified connection cable may be used, or other methods may be used.
  • the impedance section 24 is provided between the negative electrode and the varistor 21, but the impedance section 24 may also be provided between the varistor 21 and the ground electrode.
  • the impedance of the impedance section 23 on the positive side is Z positive and the impedance of the impedance section 24 on the negative side is Z negative , the following relationship may be established.
  • ⁇ Z positive > ⁇ ⁇ Z negative ⁇ is, for example, a real number equal to or greater than 1.
  • ⁇ is a coefficient that depends on the device to be protected against the surge, and depends, for example, on the dielectric strength (voltage) between the positive and negative electrodes or the current withstand capacity. Alternatively, ⁇ may depend on the dielectric strength (voltage) between the positive electrode and the ground or between the negative electrode and the ground. ⁇ may be determined appropriately depending on the power supply system in which the lightning surge protection device 100 is installed.
  • configuration example 2 by making the impedance on the positive electrode side higher than the impedance on the negative electrode side, it is possible to make it difficult for a lightning surge entering from the negative electrode side to flow from the varistor 22 on the positive electrode side to ground through the inside of the DC power supply system 10, just like in configuration example 1.
  • FIG. 7 shows an example of the configuration of the lightning surge protection device 100.
  • the configuration shown in Fig. 7 corresponds to the configuration of Fig. 6, in which the portion of the lightning surge protection device 100 provided on the cable connected to the DC power supply system is extracted.
  • the lightning surge protection device 100 includes a positive impedance section 110, a positive lightning arrester 120, a negative impedance section 130, a negative lightning arrester 140, and a ground electrode 150.
  • the impedance section 23 shown in FIG. 6 is an example of the impedance section 110
  • the impedance section 24 is an example of the impedance section 130
  • the varistor 22 is an example of the lightning arrester 120
  • the varistor 22 is an example of the lightning arrester 140.
  • a lightning surge protection device for use in a DC power supply system comprising: a first impedance section for increasing the impedance of one of the positive and negative polarities; A positive lightning arrester; A negative lightning arrester; A lightning surge protection device equipped with: (Additional Note 2) 2.
  • the lightning surge protection device according to claim 1 further comprising: a second impedance section for increasing impedance on a side having a polarity opposite to that on which the first impedance section is provided.
  • Appendix 3 The lightning surge protection device according to claim 2, further comprising a difference between an impedance of the first impedance section and an impedance of the second impedance section.
  • a power supply system comprising: a DC power supply system; and the lightning surge protection device according to any one of claims 1 to 4.

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  • Emergency Protection Circuit Devices (AREA)

Abstract

Un dispositif de contre-mesure de surtension atmosphérique utilisé pour un système d'alimentation en courant continu comprend : une première partie d'impédance pour augmenter l'impédance du côté polarité de l'une quelconque d'une électrode positive et d'une électrode négative ; un parafoudre du côté électrode positive ; et un parafoudre du côté électrode négative.
PCT/JP2023/021616 2023-06-09 2023-06-09 Dispositif de contre-mesure de surtension atmosphérique et système d'alimentation électrique Pending WO2024252685A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2025525926A JPWO2024252685A1 (fr) 2023-06-09 2023-06-09
PCT/JP2023/021616 WO2024252685A1 (fr) 2023-06-09 2023-06-09 Dispositif de contre-mesure de surtension atmosphérique et système d'alimentation électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2023/021616 WO2024252685A1 (fr) 2023-06-09 2023-06-09 Dispositif de contre-mesure de surtension atmosphérique et système d'alimentation électrique

Publications (1)

Publication Number Publication Date
WO2024252685A1 true WO2024252685A1 (fr) 2024-12-12

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ID=93795840

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/021616 Pending WO2024252685A1 (fr) 2023-06-09 2023-06-09 Dispositif de contre-mesure de surtension atmosphérique et système d'alimentation électrique

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JP (1) JPWO2024252685A1 (fr)
WO (1) WO2024252685A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62152644U (fr) * 1986-03-14 1987-09-28
JP2016059140A (ja) * 2014-09-08 2016-04-21 日本電信電話株式会社 サージ電圧防護回路

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62152644U (fr) * 1986-03-14 1987-09-28
JP2016059140A (ja) * 2014-09-08 2016-04-21 日本電信電話株式会社 サージ電圧防護回路

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