CN203117365U - Online insulation monitoring system suitable for photovoltaic grid-connected power generation system - Google Patents

Online insulation monitoring system suitable for photovoltaic grid-connected power generation system Download PDF

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Publication number
CN203117365U
CN203117365U CN 201220708530 CN201220708530U CN203117365U CN 203117365 U CN203117365 U CN 203117365U CN 201220708530 CN201220708530 CN 201220708530 CN 201220708530 U CN201220708530 U CN 201220708530U CN 203117365 U CN203117365 U CN 203117365U
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CN
China
Prior art keywords
described
insulation
connected
grid
module
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CN 201220708530
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Chinese (zh)
Inventor
尚超
肖岸文
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长沙全程数字机电科技有限公司
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Priority to CN 201220708530 priority Critical patent/CN203117365U/en
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Publication of CN203117365U publication Critical patent/CN203117365U/en

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Abstract

The utility model discloses an online insulation monitoring system suitable for a photovoltaic grid-connected power generation system. The online insulation monitoring system suitable for the photovoltaic grid-connected power generation system includes an insulation intelligent leakage current sensor, an insulation balancing resistor, an insulation voltage transmitter, an insulation monitor and an upper computer. The insulation monitor includes a data receiving module, a data processing module, an alarm module, an I/O port and a communication module. When data in the data processing module exceeds a correspondingly predetermined value, the alarm module is started for alarming. When devices or circuits in the online insulation monitoring system suitable for the photovoltaic grid-connected power generation system break down, the I/O port drives an external alarm execution device for alarming and the communication module communicates with the upper host. The online insulation monitoring system suitable for the photovoltaic grid-connected power generation system can realize online multipoint monitoring of an insulation condition of the photovoltaic grid-connected power generation system and can alarm automatically. The online insulation monitoring system suitable for the photovoltaic grid-connected power generation system is high in safety performance and convenient for maintenance of field operation maintainers.

Description

A kind of on-line insulation monitoring system that is applicable to grid-connected photovoltaic system

Technical field

The utility model relates to a kind of on-line insulation monitoring system, is specifically related to a kind of on-line insulation monitoring system that is applicable to grid-connected photovoltaic system.

Background technology

Solar electrical energy generation is divided into photo-thermal power generation and photovoltaic generation, and usually said solar electrical energy generation refers to solar energy power generating, is called for short " photoelectricity ".Photovoltaic generation is to utilize the photovoltaic effect of interface and a kind of technology of luminous energy directly being changed into electric energy; the key element of this technology is solar cell; solar cell can form large-area solar module through carrying out packaging protection after connecting, and cooperates parts such as going up power controller just to form photovoltaic power generation apparatus again.

Photovoltaic generating system can be divided into from net electricity generation system and grid-connected system, wherein, and from the net electricity generation system: mainly formed by solar module, controller, accumulator, if will power for AC load, also need to dispose AC inverter; To be exactly the direct current that produces of solar components through combining inverter convert to grid-connected system meets this back of alternating current that utility grid requires and directly insert public electric wire net, it generally all is national power station that grid-connected system has the centralized large-scale power station of being incorporated into the power networks, principal feature is that institute's generating can be delivered directly to electrical network, powered to the user by the electrical network unified allocation of resources, but the investment of this power station is big, construction period is long, floor area is big, also not too great development at present, and the dispersed miniature grid-connected system, particularly BIPV electricity generation system, because investment is little, build fast, floor area is little, advantages such as policy support great efforts are the main flows of generating electricity by way of merging two or more grid systems at present.

In grid-connected system, usually adopt and be arranged in parallel a plurality of solar components to promote the output voltage of grid-connected system, because of direct current output loop in the system numerous, can occur situation such as insulation damages unavoidably and cause insulation and descend, and influence the normal operation of consumer and electrical network, and threaten for on-the-spot operation maintenance personnel's personal safety, when insulation damages appears in the direct current output loop, the operation maintenance personnel need investigate each branch road one by one, because of direct current output loop One's name is legion, and be difficult to detect in time and find out the concrete branch road that insulation descends, thereby, very big inconvenience caused to maintenance.

The utility model content

Problem at the prior art existence, the purpose of this utility model is to provide a kind of on-line insulation monitoring system that is applicable to grid-connected photovoltaic system, the insulation status of its each branch road of energy on-line monitoring grid-connected photovoltaic system, the insulation status of grid-connected photovoltaic system is realized online multiple spot monitoring, and can report to the police safe and convenient on-the-spot operation maintenance personnel maintenance automatically.

A kind of on-line insulation monitoring system that is applicable to grid-connected photovoltaic system that the utility model provides, wherein, described grid-connected photovoltaic system comprises the many groups photovoltaic electrification component that connects successively, direct current cabinet and inverter, every group of described photovoltaic electrification component comprises solar panels and connects described solar panels and the header box of described direct current cabinet, described direct current cabinet is connected with described inverter via positive and negative busbar, described inverter is connected with external power grid, the described on-line insulation monitoring system of grid-connected photovoltaic system that is applicable to comprises the intelligent leakage current sensor of insulation, the insulation balance resistance, the insulation voltage transmitter, insulating monitoring instrument and host computer, wherein, the intelligent leakage current sensor of described insulation is located between described header box and the described direct current cabinet, and realize communication by RS485 communication interface and described insulating monitoring instrument, described insulation balance resistance one end ground connection, the other end is connected with described positive and negative busbar, described insulation balance resistance is connected with described insulating monitoring instrument via described insulation voltage transmitter with described positive and negative busbar, described insulating monitoring instrument comprises data reception module, data processing module, alarm module, I/O port and communication module, wherein, described data reception module is in order to receive the data that the intelligent leakage current sensor of described insulation and described insulation voltage transmitter transmit, described data processing module is in order to add up the data of described data reception module and aggregation process, described alarm module is connected with described data processing module, when the data in the described data processing module exceed corresponding setting value, described alarm module is opened and is reported to the police, described I/O port directly is connected with external alarming execution device, when each equipment in the described on-line insulation monitoring system that is applicable to grid-connected photovoltaic system or circuit break down, the described external alarming execution device of described I/O port driver is reported to the police, and described communication module carries out communication by RS485 or TCP/IP communication interface with described data processing module and described host computer.

Based on disclosing of above technical scheme, the utility model possesses following beneficial effect:

In a kind of on-line insulation monitoring system that is applicable to grid-connected photovoltaic system that the utility model provides, the intelligent leakage current sensor of described insulation is in order to monitor the insulation status of each photovoltaic electrification component place branch road, described insulation voltage transmitter is in order to be sent to described insulating monitoring instrument with the voltage of described positive and negative busbar and the potential change of described insulation balance resistance, to monitor the insulation status of described positive and negative busbar, because the intelligent leakage current sensor of described insulation is connected with described insulating monitoring instrument with described insulation voltage transmitter, so, described insulating monitoring instrument can be monitored the insulation status of each photovoltaic electrification component place branch road and the insulation status of described positive and negative busbar, and when insulation status goes wrong, described alarm module is in time reported to the police, with security and the convenient for maintaining personnel maintenance that guarantees photovoltaic generating system, in addition, when each equipment in the described on-line insulation monitoring system that is applicable to grid-connected photovoltaic system and circuit break down, the described external alarming execution device of described I/O port driver is reported to the police, described I/O port and described external alarming execution device, can carry out self check to each equipment and the circuit in the described on-line insulation monitoring system that is applicable to grid-connected photovoltaic system, to guarantee the described inherently safe that is applicable to the on-line insulation monitoring system of grid-connected photovoltaic system, further, described communication module carries out communication by RS485 or TCP/IP communication interface with described data processing module and described host computer, so, can carry out remote monitoring to described photovoltaic generating system by described host computer, thereby, further facilitate monitoring and maintenance.

Description of drawings

Fig. 1 is the application synoptic diagram of the on-line insulation monitoring system that is applicable to grid-connected photovoltaic system that provides of the utility model.

The drawing reference numeral explanation

Solar panels 11

Header box 12

Direct current cabinet 13

Inverter 14

Intelligent leakage current sensor 21 insulate

Insulation balance resistance 22

Insulation voltage transmitter 23

Insulating monitoring instrument 24

Host computer 25

Embodiment

Further specify the technical solution of the utility model below in conjunction with accompanying drawing and by embodiment:

Problem at the prior art existence, the purpose of this utility model is to provide a kind of on-line insulation monitoring system that is applicable to grid-connected photovoltaic system, the insulation status of its each branch road of energy on-line monitoring grid-connected photovoltaic system, the insulation status of grid-connected photovoltaic system is realized online multiple spot monitoring, and can report to the police safe and convenient on-the-spot operation maintenance personnel maintenance automatically.

See also Fig. 1, a kind of on-line insulation monitoring system that is applicable to grid-connected photovoltaic system that the utility model provides, wherein, described grid-connected photovoltaic system comprises the many groups photovoltaic electrification component that connects successively, direct current cabinet 13 and inverter 14, every group of described photovoltaic electrification component comprises solar panels 11 and connects the header box 12 of described solar panels 11 and described direct current cabinet 13, described direct current cabinet 13 is connected with described inverter 14 via positive and negative busbar, described inverter 14 is connected with external power grid, the described on-line insulation monitoring system of grid-connected photovoltaic system that is applicable to comprises the intelligent leakage current sensor 21 of insulation, insulation balance resistance 22, insulation voltage transmitter 23, insulating monitoring instrument 24 and host computer 25, wherein, the intelligent leakage current sensor 21 of described insulation is located between described header box 12 and the described direct current cabinet 13, and realize communication by RS485 communication interface and described insulating monitoring instrument 24, described insulation balance resistance 22 1 end ground connection, the other end is connected with described positive and negative busbar, described insulation balance resistance 22 is connected with described insulating monitoring instrument 24 via described insulation voltage transmitter 23 with described positive and negative busbar, described insulating monitoring instrument 24 comprises data reception module (not shown), data processing module (not shown), alarm module (not shown), I/O port (not shown) and communication module (not shown), wherein, wherein, described data reception module is in order to receive the data that the intelligent leakage current sensor 21 of described insulation and described insulation voltage transmitter 23 transmit, described data processing module is in order to add up the data of described data reception module and aggregation process, described alarm module is connected with described data processing module, when the data in the described data processing module exceed corresponding setting value, described alarm module is opened and is reported to the police, described I/O port directly is connected with external alarming execution device (can be acoustic-optic alarm), when each equipment in the described on-line insulation monitoring system that is applicable to grid-connected photovoltaic system or circuit break down, the described external alarming execution device of described I/O port driver is reported to the police, and described communication module carries out communication by RS485 or TCP/IP communication interface with described data processing module and described host computer 25.

Based on disclosing of above technical scheme, the utility model possesses following beneficial effect:

In a kind of on-line insulation monitoring system that is applicable to grid-connected photovoltaic system that the utility model provides, the intelligent leakage current sensor 21 of described insulation is in order to monitor the insulation status of each photovoltaic electrification component place branch road, described insulation voltage transmitter 23 is in order to be sent to described insulating monitoring instrument 24 with the voltage of described positive and negative busbar and the potential change of described insulation balance resistance 22, to monitor the insulation status of described positive and negative busbar, because the intelligent leakage current sensor 21 of described insulation is connected with described insulating monitoring instrument 24 with described insulation voltage transmitter 23, so, described insulating monitoring instrument 24 can be monitored the insulation status of each photovoltaic electrification component place branch road and the insulation status of described positive and negative busbar, described alarm module is in time reported to the police, with security and the convenient for maintaining personnel maintenance that guarantees photovoltaic generating system, in addition, when each equipment in the described on-line insulation monitoring system that is applicable to grid-connected photovoltaic system and circuit break down, the described external alarming execution device of described I/O port driver is reported to the police, described I/O port and described external alarming execution device, can carry out self check to each equipment and the circuit in the described on-line insulation monitoring system that is applicable to grid-connected photovoltaic system, to guarantee the described inherently safe that is applicable to the on-line insulation monitoring system of grid-connected photovoltaic system, further, described communication module carries out communication by RS485 or TCP/IP communication interface with described data processing module and described host computer 25, so, can carry out remote monitoring by 25 pairs of described photovoltaic generating systems of described host computer, thereby, further facilitate monitoring and maintenance.

By reference to the accompanying drawings the utility model has been carried out exemplary description above; obvious realization of the present utility model is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present utility model and technical scheme to carry out; or without improving design of the present utility model and technical scheme are directly applied to other occasion, all in protection domain of the present utility model.

Claims (1)

1. on-line insulation monitoring system that is applicable to grid-connected photovoltaic system, wherein, described grid-connected photovoltaic system comprises the many groups photovoltaic electrification component that connects successively, direct current cabinet and inverter, every group of described photovoltaic electrification component comprises solar panels and connects described solar panels and the header box of described direct current cabinet, described direct current cabinet is connected with described inverter via positive and negative busbar, described inverter is connected with external power grid, it is characterized in that, the described on-line insulation monitoring system of grid-connected photovoltaic system that is applicable to comprises the intelligent leakage current sensor of insulation, the insulation balance resistance, the insulation voltage transmitter, insulating monitoring instrument and host computer, wherein, the intelligent leakage current sensor of described insulation is located between described header box and the described direct current cabinet, and realize communication by RS485 communication interface and described insulating monitoring instrument, described insulation balance resistance one end ground connection, the other end is connected with described positive and negative busbar, described insulation balance resistance is connected with described insulating monitoring instrument via described insulation voltage transmitter with described positive and negative busbar, described insulating monitoring instrument comprises data reception module, data processing module, alarm module, I/O port and communication module, wherein, described data reception module is in order to receive the data that the intelligent leakage current sensor of described insulation and described insulation voltage transmitter transmit, described data processing module is in order to add up the data of described data reception module and aggregation process, described alarm module is connected with described data processing module, when the data in the described data processing module exceed corresponding setting value, described alarm module is opened and is reported to the police, described I/O port directly is connected with external alarming execution device, when each equipment in the described on-line insulation monitoring system that is applicable to grid-connected photovoltaic system or circuit break down, the described external alarming execution device of described I/O port driver is reported to the police, and described communication module carries out communication by RS485 or TCP/IP communication interface with described data processing module and described host computer.
CN 201220708530 2012-12-20 2012-12-20 Online insulation monitoring system suitable for photovoltaic grid-connected power generation system CN203117365U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103543322A (en) * 2013-10-29 2014-01-29 清源科技(厦门)股份有限公司 Leak current detection device for photovoltaic grid-connected inverter
CN103558496A (en) * 2013-11-14 2014-02-05 阳光电源股份有限公司 Single pole grounding system and fault detection device and method thereof
CN105093060A (en) * 2014-05-19 2015-11-25 北京人民电器厂有限公司 Low-voltage DC power transmission and distribution on-line insulation monitoring method, and adaptive end grounding line selection device
CN105606897A (en) * 2015-12-28 2016-05-25 哈密创动科技有限公司 Branch insulating impedance monitoring and PV power generation method, inverter and PV power generation system
CN105652097A (en) * 2015-12-24 2016-06-08 阳光电源股份有限公司 Photovoltaic grid-connected power generation system and grid-side insulation resistance detecting device thereof
US10396710B2 (en) 2016-06-21 2019-08-27 International Business Machines Corporation Monitoring and evaluating performance and aging of solar photovoltaic generation systems and power inverters

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103543322A (en) * 2013-10-29 2014-01-29 清源科技(厦门)股份有限公司 Leak current detection device for photovoltaic grid-connected inverter
CN103543322B (en) * 2013-10-29 2016-05-04 清源科技(厦门)股份有限公司 A kind of photovoltaic combining inverter leak current detection device
CN103558496A (en) * 2013-11-14 2014-02-05 阳光电源股份有限公司 Single pole grounding system and fault detection device and method thereof
CN103558496B (en) * 2013-11-14 2016-08-17 阳光电源股份有限公司 A kind of one pole earthed system and failure detector, method
CN105093060A (en) * 2014-05-19 2015-11-25 北京人民电器厂有限公司 Low-voltage DC power transmission and distribution on-line insulation monitoring method, and adaptive end grounding line selection device
CN105652097A (en) * 2015-12-24 2016-06-08 阳光电源股份有限公司 Photovoltaic grid-connected power generation system and grid-side insulation resistance detecting device thereof
CN105652097B (en) * 2015-12-24 2019-04-09 阳光电源股份有限公司 A kind of grid-connected photovoltaic system and its grid side insulation resistance detection device
CN105606897A (en) * 2015-12-28 2016-05-25 哈密创动科技有限公司 Branch insulating impedance monitoring and PV power generation method, inverter and PV power generation system
CN105606897B (en) * 2015-12-28 2019-02-26 哈密创动科技有限公司 Branch insulation impedance monitoring and photovoltaic power generation method, inverter and photovoltaic system
US10396710B2 (en) 2016-06-21 2019-08-27 International Business Machines Corporation Monitoring and evaluating performance and aging of solar photovoltaic generation systems and power inverters

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Granted publication date: 20130807

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