CN103412495A - Method for scanning inverter input matrix insulation impedance in marching type - Google Patents
Method for scanning inverter input matrix insulation impedance in marching type Download PDFInfo
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- CN103412495A CN103412495A CN2013103175643A CN201310317564A CN103412495A CN 103412495 A CN103412495 A CN 103412495A CN 2013103175643 A CN2013103175643 A CN 2013103175643A CN 201310317564 A CN201310317564 A CN 201310317564A CN 103412495 A CN103412495 A CN 103412495A
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Abstract
The invention relates to a method for scanning inverter input matrix insulation impedance in a marching type. The method includes the following steps that firstly, a controller controls a first switch to close, ground insulation equivalent admittance of a first matrix is detected to be Geq1 by the controller through a sampling measuring program, and the insulation admittance of the first matrix is Gpv1; secondly, the controller controls a second switch to close, ground insulation equivalent admittance between the first matrix and a second matrix is detected to be Geq2 by the controller through the sampling measuring program, and insulation admittance Gpv2 of the second matrix is obtained by the controller by subtracting the Geq1 from the Geq2. Insulation admittances of EJQ matrixes are sequentially obtained according to the steps, therefore, whether insulation admittance of each input matrix meets requirements or not is judged, and series-connection switches of matrixes without meeting the requirements are switched off.
Description
Technical field
The present invention relates to a kind of method of step-by-step movement scanning inverter input square formation insulation impedance.
Background technology
Photovoltaic array is installed on ground by the support large tracts of land usually, and due to variation or the fortuitous event of air conditions, occasional causes its positive and negative bus insulation against ground impedance not meet the safety requirement, may produce injury to the staff.But can there be following problem in some detection modes at present: this series products is generally the import accessory, so price is higher, accounts for 2% left and right of inversion holistic cost.And domestic inverter producer self-developing insulation impedance checkout equipment, the structure of this insulation impedance checkout equipment controls requirement according to self-adaptation multimodal maximal power tracing and the integrated characteristics of direct current cabinet design, the P-V family curve of Ke Duimei road photovoltaic array is independently identified, without external direct current cabinet, reduce the photovoltaic generating system cost, can solve again the heavy DC primary cut-out corresponding problem that Vehicles Collected from Market is unable to supply simultaneously.But because MW class inverter input group string is more, its square formation insulation impedance is lower, if directly measure and be prone to erroneous judgement.
Summary of the invention
The technical issues that need to address of the present invention are to provide a kind of photovoltaic module surface and automatically remove obstacles and shading integrated device.
A kind of method of step-by-step movement scanning inverter input square formation insulation impedance, is characterized in that, comprises the following steps:
Step 1, controller is controlled the first switch closure, and it is Geq1 that controller detects the first square formation insulation against ground equivalent admittance by the sampled measurements program, and the insulation admittance of the first square formation is Gpv1;
Step 2, controller is controlled the second switch closure, and controller detects the first square formation and the second square formation insulation against ground equivalent admittance Geq2 by the sampled measurements program, and controller adopts Geq2 to deduct Geq1, and the insulation admittance that obtains the second square formation is Gpv2;
According to above-mentioned steps, draw successively the insulation admittance of closing section's square formation, and then obtain respectively inputting the square formation insulation impedance and judge whether to meet the demands, the switch of connecting on the square formation do not met the demands is disconnected.
Adopted such scheme, the present invention is optimized design and material type selecting to filtering circuit topological sum parameter, can effectively protect and improve the grid-connected current quality.The present invention adopts membrane capacitance, the design of integral type integrated heat spreader and low boiling point working medium evaporation cooling technique, and adopt the special-purpose high device matter wave filter of photovoltaic combining inverter etc., to compare equal content volume little with the multimachine unitized construction, lightweight, compact conformation, cost is more than 20%.
The accompanying drawing explanation
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Fig. 1 is process flow diagram of the present invention.
Embodiment
With reference to Fig. 1, the method for a kind of step-by-step movement scanning inverter input square formation insulation impedance of the present invention comprises the following steps:
Step 1, controller is controlled the first switch closure, and it is Geq1 that controller detects the first square formation insulation against ground equivalent admittance by the sampled measurements program, and the insulation admittance of the first square formation is Gpv1;
Step 2, controller is controlled the second switch closure, and controller detects the first square formation and the second square formation insulation against ground equivalent admittance Geq2 by the sampled measurements program, and controller adopts Geq2 to deduct Geq1, and the insulation admittance that obtains the second square formation is Gpv2;
According to above-mentioned steps, draw successively the insulation admittance of closing section's square formation, and then obtain respectively inputting the square formation insulation impedance and judge whether to meet the demands, the switch of connecting on the square formation do not met the demands is disconnected.
Claims (1)
1. the method for a step-by-step movement scanning inverter input square formation insulation impedance, is characterized in that, comprises the following steps:
Step 1, controller is controlled the first switch closure, and it is Geq1 that controller detects the first square formation insulation against ground equivalent admittance by the sampled measurements program, and the insulation admittance of the first square formation is Gpv1;
Step 2, controller is controlled the second switch closure, and controller detects the first square formation and the second square formation insulation against ground equivalent admittance Geq2 by the sampled measurements program, and controller adopts Geq2 to deduct Geq1, and the insulation admittance that obtains the second square formation is Gpv2;
According to above-mentioned steps, draw successively the insulation admittance of closing section's square formation, and then obtain respectively inputting the square formation insulation impedance and judge whether to meet the demands, the switch of connecting on the square formation do not met the demands is disconnected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103175643A CN103412495A (en) | 2013-07-26 | 2013-07-26 | Method for scanning inverter input matrix insulation impedance in marching type |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013103175643A CN103412495A (en) | 2013-07-26 | 2013-07-26 | Method for scanning inverter input matrix insulation impedance in marching type |
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| CN103412495A true CN103412495A (en) | 2013-11-27 |
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| CN2013103175643A Pending CN103412495A (en) | 2013-07-26 | 2013-07-26 | Method for scanning inverter input matrix insulation impedance in marching type |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112083230A (en) * | 2020-09-07 | 2020-12-15 | 爱士惟新能源技术(江苏)有限公司 | Ground insulation impedance detection circuit and method of grid-connected inverter |
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| WO2011086216A1 (en) * | 2010-01-14 | 2011-07-21 | Consejo Superior De Investigaciones Científicas (Csic) | Bacteria-detecting inductive device |
| CN202533511U (en) * | 2012-03-14 | 2012-11-14 | 昆兰新能源技术常州有限公司 | Ground insulation impedance detection circuit of photovoltaic inverter |
| CN202583327U (en) * | 2012-05-09 | 2012-12-05 | 江苏博纬新能源科技有限公司 | Insulation impedance detection circuit of photovoltaic grid-connected inverter with double-circuit MPPT (Maximum Power Point Tracking) |
| CN103048544A (en) * | 2012-12-13 | 2013-04-17 | 常熟开关制造有限公司(原常熟开关厂） | Insulation resistance monitoring method of photovoltaic power generation system |
| CN202994907U (en) * | 2012-12-14 | 2013-06-12 | 常熟开关制造有限公司(原常熟开关厂） | Insulation impedance detection system of photovoltaic inverter |
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2013
- 2013-07-26 CN CN2013103175643A patent/CN103412495A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011086216A1 (en) * | 2010-01-14 | 2011-07-21 | Consejo Superior De Investigaciones Científicas (Csic) | Bacteria-detecting inductive device |
| CN202533511U (en) * | 2012-03-14 | 2012-11-14 | 昆兰新能源技术常州有限公司 | Ground insulation impedance detection circuit of photovoltaic inverter |
| CN202583327U (en) * | 2012-05-09 | 2012-12-05 | 江苏博纬新能源科技有限公司 | Insulation impedance detection circuit of photovoltaic grid-connected inverter with double-circuit MPPT (Maximum Power Point Tracking) |
| CN103048544A (en) * | 2012-12-13 | 2013-04-17 | 常熟开关制造有限公司(原常熟开关厂） | Insulation resistance monitoring method of photovoltaic power generation system |
| CN202994907U (en) * | 2012-12-14 | 2013-06-12 | 常熟开关制造有限公司(原常熟开关厂） | Insulation impedance detection system of photovoltaic inverter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112083230A (en) * | 2020-09-07 | 2020-12-15 | 爱士惟新能源技术(江苏)有限公司 | Ground insulation impedance detection circuit and method of grid-connected inverter |
| CN112083230B (en) * | 2020-09-07 | 2023-05-23 | 爱士惟科技股份有限公司 | Ground insulation resistance detection circuit and method for grid-connected inverter |
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Application publication date: 20131127 |