WO2024252685A1 - 雷サージ対策装置、及び給電システム - Google Patents
雷サージ対策装置、及び給電システム Download PDFInfo
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- 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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- impedance
- power supply
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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
Description
正極と負極のうちのいずれかの極性の側のインピーダンスを高くするための第1インピーダンス部と、
正極側の避雷器と、
負極側の避雷器と、
を備える雷サージ対策装置が提供される。
前述したとおり、DC/DCコンバータ等の直流給電システムにおける雷サージ対策として、バリスタを直流給電システムの出力(雷サージが侵入する)側に設置することが知られている。
しかし、直流給電システム10の出力側の内部回路(入力側でも同様)が非対称になっている場合、図1に示すような正極と接地極との間および負極と接地極との間にバリスタ21、22を設置する対策では図2に示す問題が生じる場合がある。
図5に、本実施の形態における給電システムの構成例1を示す。構成例1は、図2に示した構成に対して、正極と接地極との間にインピーダンス部23を追加した構成である。
図6に、本実施の形態におけるシステムの構成例2を示す。図6に示すように、構成例2は、構成例1(図5)に対して、負極と接地極との間に、負極側のインピーダンス(負極と接地極との間のインピーダンス)を高くするためのインピーダンス部24が追加された構成である。
αは、例えば、1以上の実数である。αは、対策の対象となる装置に依存する係数であり、例えば、正極と負極との間の絶縁耐力(電圧)あるいは電流耐量に依存する。あるいは、αは、正極と対地との間あるいは負極と対地との間の絶縁耐力(電圧)に依存する場合もある。αは、雷サージ対策装置100を導入する給電システムに応じて、適宜定めればよい。
図7に、雷サージ対策装置100の構成例を示す。図7に示す構成は、図6において、直流給電システムに接続されるケーブルに備えられる雷サージ対策装置100の部分を抜き出した構成に対応する。
以上説明した雷サージ対策装置100を導入することにより、正極側のケーブルと負極側のケーブルの両方に雷サージが侵入した場合、あるいは、負極側のケーブルのみに雷サージが侵入した場合でも、正極側のバリスタと負極側のバリスタの両方が動作するとともに、負極側に侵入した雷サージが内部回路を介して正極側のバリスタに流れ込むことがなくなるため、雷サージに対する対策効果を高くすることができる。
(付記項1)
直流給電システムに対して使用される雷サージ対策装置であって、
正極と負極のうちのいずれかの極性の側のインピーダンスを高くするための第1インピーダンス部と、
正極側の避雷器と、
負極側の避雷器と、
を備える雷サージ対策装置。
(付記項2)
前記第1インピーダンス部が備えられる極性と逆の極性の側のインピーダンスを高くするための第2インピーダンス部
を更に備える付記項1に記載の雷サージ対策装置。
(付記項3)
前記第1インピーダンス部のインピーダンスと前記第2インピーダンス部のインピーダンスとの間に差を設ける
付記項2に記載の雷サージ対策装置。
(付記項4)
前記第1インピーダンス部が備えられる極性の側において、前記第1インピーダンス部は、ケーブルと避雷器との間、又は、当該避雷器と接地極との間に備えられる
付記項1ないし3のうちいずれか1項に記載の雷サージ対策装置。
(付記項5)
直流給電システムと、付記項1ないし4のうちいずれか1項に記載の前記雷サージ対策装置とを備える給電システム。
11 内部回路
12 ダイオード
21、22 バリスタ
23、24 インピーダンス部
100 雷サージ対策装置
110 インピーダンス部
120 避雷器
130 インピーダンス部
140 避雷器
150 接地極
Claims (5)
- 直流給電システムに対して使用される雷サージ対策装置であって、
正極と負極のうちのいずれかの極性の側のインピーダンスを高くするための第1インピーダンス部と、
正極側の避雷器と、
負極側の避雷器と、
を備える雷サージ対策装置。 - 前記第1インピーダンス部が備えられる極性と逆の極性の側のインピーダンスを高くするための第2インピーダンス部
を更に備える請求項1に記載の雷サージ対策装置。 - 前記第1インピーダンス部のインピーダンスと前記第2インピーダンス部のインピーダンスとの間に差を設ける
請求項2に記載の雷サージ対策装置。 - 前記第1インピーダンス部が備えられる極性の側において、前記第1インピーダンス部は、ケーブルと避雷器との間、又は、当該避雷器と接地極との間に備えられる
請求項1ないし3のうちいずれか1項に記載の雷サージ対策装置。 - 直流給電システムと、請求項1ないし3のうちいずれか1項に記載の前記雷サージ対策装置とを備える給電システム。
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| Application Number | Priority Date | Filing Date | Title |
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| JP2025525926A JPWO2024252685A1 (ja) | 2023-06-09 | 2023-06-09 | |
| PCT/JP2023/021616 WO2024252685A1 (ja) | 2023-06-09 | 2023-06-09 | 雷サージ対策装置、及び給電システム |
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| PCT/JP2023/021616 WO2024252685A1 (ja) | 2023-06-09 | 2023-06-09 | 雷サージ対策装置、及び給電システム |
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| WO2024252685A1 true WO2024252685A1 (ja) | 2024-12-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7886645B1 (ja) * | 2025-03-10 | 2026-07-08 | 音羽電機工業株式会社 | 直流用耐雷装置 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62152644U (ja) * | 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 |
-
2023
- 2023-06-09 WO PCT/JP2023/021616 patent/WO2024252685A1/ja not_active Ceased
- 2023-06-09 JP JP2025525926A patent/JPWO2024252685A1/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62152644U (ja) * | 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7886645B1 (ja) * | 2025-03-10 | 2026-07-08 | 音羽電機工業株式会社 | 直流用耐雷装置 |
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| Publication number | Publication date |
|---|---|
| JPWO2024252685A1 (ja) | 2024-12-12 |
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