EP2608172A1 - Dispositif antivol pour câbles électriques - Google Patents
Dispositif antivol pour câbles électriques Download PDFInfo
- Publication number
- EP2608172A1 EP2608172A1 EP12198220.1A EP12198220A EP2608172A1 EP 2608172 A1 EP2608172 A1 EP 2608172A1 EP 12198220 A EP12198220 A EP 12198220A EP 2608172 A1 EP2608172 A1 EP 2608172A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- theft device
- toroidal transformer
- transformer
- electrical
- turns
- 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.)
- Withdrawn
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 12
- 230000005674 electromagnetic induction Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
- G08B13/14—Mechanical actuation by lifting or attempted removal of hand-portable articles
- G08B13/1409—Mechanical actuation by lifting or attempted removal of hand-portable articles for removal detection of electrical appliances by detecting their physical disconnection from an electrical system, e.g. using a switch incorporated in the plug connector
- G08B13/1418—Removal detected by failure in electrical connection between the appliance and a control centre, home control panel or a power supply
Definitions
- the present invention relates to an anti-theft device for electrical cables.
- the theft of copper cables is nowadays increasingly widespread, especially from photovoltaic plants located in remote and sparsely populated regions.
- the electrical cables most in danger of theft are the backbone connections, which connect the various rows of solar panels; these are copper cables with a cross-section of up to 70 square millimeters, through which currents of up to 200A and voltages of 900V pass; such electrical cables have a value in the order of thousands of Euros for each plant, but are also easy to cut and extract from the protection ducting.
- the aim of the present invention is to provide an anti-theft device for electrical cables which makes it possible to know when such backbones of photovoltaic panel plants are removed or tampered with.
- an object of the invention is to provide an anti-theft device which can also be applied to electrical cables of other types and other types of functionality.
- Another object of the invention is to provide an anti-theft device for electrical cables specifically in order to prevent the theft or tampering of cables which form the connection backbones between rows of photovoltaic panels in photovoltaic plants.
- Another object of the invention is to provide an anti-theft device that is easy to install and control.
- Another object of the invention is to provide an anti-theft device for electrical cables that can be made using conventional systems and technologies.
- an anti-theft device for electrical cables characterized in that it comprises two toroidal transformers which are arranged so that each one surrounds an end portion of an electrical line,
- an anti-theft device for electrical cables is generally designated with the reference numeral 10.
- Such anti-theft device 10 is shown applied to a photovoltaic plant A, which is understood to be conventional, comprising a series of strings of photovoltaic modules B1, B2, B3 and B4 which are interconnected to an inverter C by way of an electrical line D, known as a backbone, which concentrates the strings B1, B2, B3 and B4;
- the electrical line D comprises two electrical cables E and F; the first cable E connects the positive pole of the strings B1, B2, B3 and B4 to the inverter C, whereas the second electrical cable F connects the inverter to the negative pole of the same strings.
- the anti-theft device 10 comprises two toroidal transformers 11 and 12 which are arranged so that each one surrounds an end portion of an electrical cable E and F of the electrical line D; in particular the first toroidal transformer 11 is crossed by the first cable E, corresponding to the positive pole of the group of strings, in proximity to the inverter C, and the second toroidal transformer 12 is crossed by the second cable F, corresponding to the negative pole of the group of strings, also in proximity to the inverter C.
- the first toroidal transformer 11 and the second toroidal transformer 12 are connected to a control unit 13 for controlling and managing the signals emitted by the first transformer 11 and for detecting and interpreting the signals received by the second transformer 12.
- the anti-theft device 10 comprises a capacitor 14, for the passage of the AC signal to be interposed between the two non-connected consecutive portions of the electrical line D, i.e. if at a respective first end the electrical cables E and F are interconnected by way of the inverter C, then at the opposite, second ends the electrical cables E and F are not interconnected, and in order to allow the passage, from one electrical cable to the other, of the AC signal emitted by the first toroidal transformer 11 but not the passage of the direct current produced by the strings of photovoltaic panels, the capacitor 14 is placed between the two non-connected ends.
- the first toroidal transformer 11 has a low number of turns, for example between 1 and 15 turns, and preferably has 5 turns.
- the second toroidal transformer 12 is of the type with a large number of turns, for example between 500 and 3000 turns, and preferably 1000 turns.
- the capacitor 14 is of the high-voltage type.
- the capacitor 14 is of the 10uF, 1000V high RMS current type, for DC-Link applications.
- an equivalent capacitor is selected and dimensioned which is better adapted to the specific application; for example for a 230V AC grid a capacitor of class X2 is used.
- the control unit 13 comprises a microprocessor 15, a power circuit 16 for emitting the signals through the first toroidal transformer 11, and an amplifier circuit 17 for reading the signals received by the second toroidal transformer 12.
- Such control unit 13 is understood to be capable of being managed with serial communications protocols for serial logic controllers, or PLCs, of a conventional type, such as for example MODBUS.
- the operation of the anti-theft device 10 according to the invention is as follows.
- the control unit 13 at regular intervals, for example every second, generates a series of impulses at a fixed frequency, of brief duration but high energy, by way of the first toroidal transformer 1 with a low number of turns; the energy is transferred by electromagnetic induction to the electrical cable to be controlled, for example the first electrical cable E, positive, which passes within the hole of the first toroidal transformer 11.
- the impulses travel through the entire photovoltaic plant until they reach the capacitor 14 placed between the two electrical cables E and F on the other side of the inverter C, pass through it and then return, travelling through all of the second electrical cable F, negative, until they return to the control unit 13 by way of the second toroidal transformer 12 with a large number of turns.
- control unit 13 detects the current impulse, measures it and compares its values with the values stored during the installation of the anti-theft device 10.
- control unit 13 detects an anomaly and emits information or an alarm signal.
- control unit 13 In order to function correctly, the control unit 13 must be adapted in terms of power, frequency and duration of the energy impulse with respect to the length and the characteristics of the electrical cables to be controlled with the anti-theft device 10, such characteristics of electrical cables being variable from plant to plant.
- the control unit 13 moreover, performs a slow correction over time of these parameters so as to adapt to the ageing of the plant, so that no false alarms are generated over time.
- the control unit can be deactivated since it is not indispensable, in fact any failure of the photovoltaic plant by day indicates that there is an anomaly in the system.
- an anti-theft device for electrical cables has been devised which makes it possible to know when the backbones of photovoltaic panel plants are removed or tampered with.
- an anti-theft device has been devised which can also be applied to electrical cables of other types and other types of functionality.
- an anti-theft device for electrical cables has been devised that can be made using known systems and technologies.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Burglar Alarm Systems (AREA)
- Insulated Conductors (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT000401A ITPD20110401A1 (it) | 2011-12-20 | 2011-12-20 | Dispositivo antifurto per cavi elettrici |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2608172A1 true EP2608172A1 (fr) | 2013-06-26 |
Family
ID=45614949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP12198220.1A Withdrawn EP2608172A1 (fr) | 2011-12-20 | 2012-12-19 | Dispositif antivol pour câbles électriques |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP2608172A1 (fr) |
| IT (1) | ITPD20110401A1 (fr) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2991051A1 (fr) * | 2014-08-28 | 2016-03-02 | Nexans | Agencement de controle et/ou d'alerte d'une tentative de vol d'un tronçon de cable electrique |
| CN105741468A (zh) * | 2016-03-18 | 2016-07-06 | 上海路辉电子科技有限公司 | 一种电缆防盗报警系统及方法 |
| CN112071003A (zh) * | 2020-09-11 | 2020-12-11 | 安徽之翔电力建设咨询有限公司 | 一种配电网电缆防盗系统 |
| JP2023110396A (ja) * | 2022-01-28 | 2023-08-09 | 明和興業ホールディングス株式会社 | 異常検知システムおよび異常検知方法 |
| WO2025181958A1 (fr) * | 2024-02-28 | 2025-09-04 | 株式会社Tmeic | Dispositif de détection de déconnexion et procédé de détection de déconnexion |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008043814A1 (fr) * | 2006-10-13 | 2008-04-17 | Elettronica Santerno S.P.A. | Installation et convertisseur solaires permettant de convertir l'énergie solaire en énergie électrique |
| WO2009026602A1 (fr) * | 2007-08-29 | 2009-03-05 | Fronius International Gmbh | Procédé de détection de vol équipant une installation photovoltaïque, et onduleur pour une installation photovoltaïque |
| WO2011151672A1 (fr) * | 2010-05-31 | 2011-12-08 | Solaredge Technologies Ltd. | Détection et prévention du vol dans un système de génération d'alimentation |
-
2011
- 2011-12-20 IT IT000401A patent/ITPD20110401A1/it unknown
-
2012
- 2012-12-19 EP EP12198220.1A patent/EP2608172A1/fr not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008043814A1 (fr) * | 2006-10-13 | 2008-04-17 | Elettronica Santerno S.P.A. | Installation et convertisseur solaires permettant de convertir l'énergie solaire en énergie électrique |
| WO2009026602A1 (fr) * | 2007-08-29 | 2009-03-05 | Fronius International Gmbh | Procédé de détection de vol équipant une installation photovoltaïque, et onduleur pour une installation photovoltaïque |
| WO2011151672A1 (fr) * | 2010-05-31 | 2011-12-08 | Solaredge Technologies Ltd. | Détection et prévention du vol dans un système de génération d'alimentation |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2991051A1 (fr) * | 2014-08-28 | 2016-03-02 | Nexans | Agencement de controle et/ou d'alerte d'une tentative de vol d'un tronçon de cable electrique |
| CN105741468A (zh) * | 2016-03-18 | 2016-07-06 | 上海路辉电子科技有限公司 | 一种电缆防盗报警系统及方法 |
| CN112071003A (zh) * | 2020-09-11 | 2020-12-11 | 安徽之翔电力建设咨询有限公司 | 一种配电网电缆防盗系统 |
| CN112071003B (zh) * | 2020-09-11 | 2021-09-10 | 安徽之翔电力建设咨询有限公司 | 一种配电网电缆防盗系统 |
| JP2023110396A (ja) * | 2022-01-28 | 2023-08-09 | 明和興業ホールディングス株式会社 | 異常検知システムおよび異常検知方法 |
| WO2025181958A1 (fr) * | 2024-02-28 | 2025-09-04 | 株式会社Tmeic | Dispositif de détection de déconnexion et procédé de détection de déconnexion |
Also Published As
| Publication number | Publication date |
|---|---|
| ITPD20110401A1 (it) | 2013-06-21 |
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| 18D | Application deemed to be withdrawn |
Effective date: 20150324 |