CN204290502U - A kind of case supporting photovoltaic DC-to-AC converter IGBT to puncture failure detection becomes measuring and controlling protective device - Google Patents

A kind of case supporting photovoltaic DC-to-AC converter IGBT to puncture failure detection becomes measuring and controlling protective device Download PDF

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Publication number
CN204290502U
CN204290502U CN201520019216.2U CN201520019216U CN204290502U CN 204290502 U CN204290502 U CN 204290502U CN 201520019216 U CN201520019216 U CN 201520019216U CN 204290502 U CN204290502 U CN 204290502U
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Prior art keywords
photovoltaic
converter
inverter
igbt
module
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李进
陈栩
张步林
王学虎
吴军
邢志兵
黄雨晴
张金奎
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Nanjing Daqo Automation Technology Co Ltd
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Nanjing Daqo Automation Technology Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y04S10/52Outage or fault management, e.g. fault detection or location

Abstract

The utility model provides a kind of case supporting photovoltaic DC-to-AC converter IGBT to puncture failure detection to become measuring and controlling protective device, described device comprises three-phase voltage, three-phase current information for Real-time Collection photovoltaic DC-to-AC converter high and low pressure side, and carries out in real time analyzing the acquisition module judging its DC component; For whether exceeding limit value according to DC component, judge whether inverter the expert module of IGBT operation irregularity occurs; For being communicated with photovoltaic DC-to-AC converter by communication interface, Real-time Obtaining inverter internal operating state, obtains the communication module of inverter self-inspection information; For controlling the controller of three kinds of module work.The utility model have employed and detects the DC component that IGBT exports and the mentality of designing obtaining inverter internal self-inspection information, inefficacy can be punctured to photovoltaic DC-to-AC converter to give warning in advance, interlock circuit can also be disconnected, prevent fault from expanding further, the built-in locating information of device can carry out Geographic mapping in real time, facilitates operation maintenance personnel to carry out repair and maintenance.

Description

A kind of case supporting photovoltaic DC-to-AC converter IGBT to puncture failure detection becomes measuring and controlling protective device
Technical field
The utility model relates to communication technique field, particularly relates to a kind of case supporting photovoltaic DC-to-AC converter IGBT to puncture failure detection and becomes measuring and controlling protective device.
Background technology
Grid-connected photovoltaic system is primarily of equipment compositions such as photovoltaic array module, inverter, box type transformers.Inverter is the critical component connecting photovoltaic array module and electrical network, runs on maximum power point in order to realize controlling photovoltaic array module and injects the large main task of sinusoidal current two to electrical network.The usual work under bad environment of photovoltaic generating system, often run into high temperature, high and cold, high humidity, large dust storm, drench with rain, the bad weather conditions such as salt fog, these bring larger risk to the operation of inverter.IEEE Std.929-2000 regulation direct current injects must be less than 0.5% of system nominal current.Grid company does not wish to have the inverter of larger output DC component to be connected on electrical network, because inject electrical network DC component can make electric substation's transformer Point Drifting, causes transformer saturated; Increase the corrosion of power grid cables; Cause high primary current peak, input insurance may be burnt, cause power-off; Even harmonic component can be increased.This exogenous damp dirt still can affect electrical characteristic, causes inverter to lose efficacy, abnormal shutdown or demolition.
Traditional case becomes the monitoring of self and the protection that measure and control device mainly completes box type transformer; cannot lose efficacy to the inverter in electricity generation system and detect and early warning; once after inverter punctures inefficacy, the direct current of header box directly will inject electrical network, cause serious consequence.
Utility model content
In order to overcome above-mentioned deficiency, the utility model provides a kind of intelligent apparatus that can realize photovoltaic DC-to-AC converter IGBT failure detection and location, substantially increases the security reliability of whole photovoltaic generation unit, improves the stable of system.
In order to solve the problems of the technologies described above, the utility model provides a kind of case supporting photovoltaic DC-to-AC converter IGBT to puncture failure detection and becomes measuring and controlling protective device, and described device comprises:
For three-phase voltage, the three-phase current information of Real-time Collection photovoltaic DC-to-AC converter high and low pressure side, and carry out in real time analyzing the acquisition module judging its DC component;
For whether exceeding limit value according to DC component, judge whether inverter the expert module of IGBT operation irregularity occurs;
For being communicated with photovoltaic DC-to-AC converter by communication interface, Real-time Obtaining inverter internal operating state, obtains the communication module of inverter self-inspection information;
For controlling the controller of above-mentioned three kinds of module work.
Said apparatus also comprises GPS module, is controlled by controller, in large centralised surface power station, can orient geographical location information rapidly, and notice operation maintenance personnel is overhauled for the inverter of abnormal work in time.
Said apparatus also comprises SMS notification module, is controlled by controller, for detecting that inverter occurs extremely, by abnormal information and geographical location information, prepares to overhaul in time by SMS notification attendant.
Above-mentioned communication interface adopts RS485 or Ethernet interface.
The effect that the utility model is compared with prior art useful is:
The information such as three-phase voltage, three-phase current of the utility model Real-time Collection transformer high-low-voltage side, and carry out analysis in real time and judge its DC component, compare with the threshold value preset according to the value of DC component again, if find that its DC component is abnormal, inverter operation irregularity can be judged, the personnel of notice operation maintenance in time, simultaneously, device can automatic trip, by the inverter detachment system electrical network of exception, prevents DC component from filling with in a large number into system electrical network.
The utility model have employed and detects the DC component that IGBT exports and the mentality of designing obtaining inverter internal self-inspection information, inefficacy can be punctured to photovoltaic DC-to-AC converter to give warning in advance, interlock circuit can also be disconnected, prevent fault from expanding further, the built-in locating information of device can carry out Geographic mapping in real time, facilitates operation maintenance personnel to carry out repair and maintenance.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, it should be noted that, these specific descriptions just allow those of ordinary skill in the art be more prone to, clearly understand the utility model, but not to limited explanation of the present utility model.
As shown in Figure 1, a kind of case supporting photovoltaic DC-to-AC converter IGBT to puncture failure detection becomes measuring and controlling protective device, and described device comprises:
For three-phase voltage, the three-phase current information of Real-time Collection photovoltaic DC-to-AC converter high and low pressure side, and carry out in real time analyzing the acquisition module judging its DC component;
For whether exceeding limit value according to DC component, judge whether inverter the expert module of IGBT operation irregularity occurs;
For being communicated with photovoltaic DC-to-AC converter by communication interface, Real-time Obtaining inverter internal operating state, obtains the communication module of inverter self-inspection information;
For controlling the controller of above-mentioned three kinds of module work.
Said apparatus also comprises GPS module, is controlled by controller, in large centralised surface power station, can orient geographical location information rapidly, and notice operation maintenance personnel is overhauled for the inverter of abnormal work in time.
Said apparatus also comprises SMS notification module, is controlled by controller, for detecting that inverter occurs extremely, by abnormal information and geographical location information, prepares to overhaul in time by SMS notification attendant.
Above-mentioned communication interface adopts RS485 or Ethernet interface.
The information such as three-phase voltage, three-phase current of this device Real-time Collection transformer high-low-voltage side, and carry out analysis in real time and judge its DC component, compare with the threshold value preset according to the value of DC component again, if find that its DC component is abnormal, inverter operation irregularity can be judged, the personnel of notice operation maintenance in time, simultaneously, device can automatic trip, by the inverter detachment system electrical network of exception, prevents DC component from filling with in a large number into system electrical network.
This device have employed and detects the DC component that IGBT exports and the mentality of designing obtaining inverter internal self-inspection information, inefficacy can be punctured to photovoltaic DC-to-AC converter to give warning in advance, interlock circuit can also be disconnected, prevent fault from expanding further, the built-in locating information of device can carry out Geographic mapping in real time, facilitates operation maintenance personnel to carry out repair and maintenance.
Finally it should be noted that, above-mentioned explanation is only most preferred embodiment of the present utility model, not does any pro forma restriction to the utility model.Any those of ordinary skill in the art; do not departing within the scope of technical solutions of the utility model; the way of above-mentioned announcement and technology contents all can be utilized to make many possible variations and simple replacement etc. to technical solutions of the utility model, and these all belong to the scope of technical solutions of the utility model protection.

Claims (4)

1. support that the case that photovoltaic DC-to-AC converter IGBT punctures failure detection becomes a measuring and controlling protective device, it is characterized in that described device comprises:
For three-phase voltage, the three-phase current information of Real-time Collection photovoltaic DC-to-AC converter high and low pressure side, and carry out in real time analyzing the acquisition module judging its DC component;
For whether exceeding limit value according to DC component, judge whether inverter the expert module of IGBT operation irregularity occurs;
For being communicated with photovoltaic DC-to-AC converter by communication interface, Real-time Obtaining inverter internal operating state, obtains the communication module of inverter self-inspection information;
For controlling the controller of above-mentioned three kinds of module work.
2. a kind of case supporting photovoltaic DC-to-AC converter IGBT to puncture failure detection according to claim 1 becomes measuring and controlling protective device; it is characterized in that described device also comprises GPS module; controlled by controller; for in large centralised surface power station; can orient geographical location information rapidly, notice operation maintenance personnel is overhauled for the inverter of abnormal work in time.
3. a kind of case supporting photovoltaic DC-to-AC converter IGBT to puncture failure detection according to claim 1 becomes measuring and controlling protective device; it is characterized in that described device also comprises SMS notification module; controlled by controller; for detecting that inverter occurs extremely; by abnormal information and geographical location information, prepare to overhaul by SMS notification attendant in time.
4. a kind of case supporting photovoltaic DC-to-AC converter IGBT to puncture failure detection according to claim 1 becomes measuring and controlling protective device, it is characterized in that described communication interface adopts RS485 or Ethernet interface.
CN201520019216.2U 2015-01-12 2015-01-12 A kind of case supporting photovoltaic DC-to-AC converter IGBT to puncture failure detection becomes measuring and controlling protective device Active CN204290502U (en)

Priority Applications (1)

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CN201520019216.2U CN204290502U (en) 2015-01-12 2015-01-12 A kind of case supporting photovoltaic DC-to-AC converter IGBT to puncture failure detection becomes measuring and controlling protective device

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CN201520019216.2U CN204290502U (en) 2015-01-12 2015-01-12 A kind of case supporting photovoltaic DC-to-AC converter IGBT to puncture failure detection becomes measuring and controlling protective device

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108695889A (en) * 2018-06-04 2018-10-23 中山市厚源电子科技有限公司 A kind of high-efficiency photovoltaic inverter for sharing O&M
CN110244210A (en) * 2019-07-04 2019-09-17 福州丹诺西诚电子科技有限公司 A kind of breakdown detection method for IGBT unit
CN110308367A (en) * 2019-06-29 2019-10-08 许昌许继软件技术有限公司 A kind of DC distribution net system, Fault Locating Method and fault location system
WO2020244896A1 (en) * 2019-06-05 2020-12-10 Sma Solar Technology Ag Solar module, assembly that can be integrated into a solar module, and energy generation system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108695889A (en) * 2018-06-04 2018-10-23 中山市厚源电子科技有限公司 A kind of high-efficiency photovoltaic inverter for sharing O&M
WO2020244896A1 (en) * 2019-06-05 2020-12-10 Sma Solar Technology Ag Solar module, assembly that can be integrated into a solar module, and energy generation system
CN110308367A (en) * 2019-06-29 2019-10-08 许昌许继软件技术有限公司 A kind of DC distribution net system, Fault Locating Method and fault location system
CN110244210A (en) * 2019-07-04 2019-09-17 福州丹诺西诚电子科技有限公司 A kind of breakdown detection method for IGBT unit
CN110244210B (en) * 2019-07-04 2021-10-15 福州丹诺西诚电子科技有限公司 Breakdown detection method for IGBT unit

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