CN115917334A - 阻抗检测方法和光伏*** - Google Patents
阻抗检测方法和光伏*** Download PDFInfo
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- CN115917334A CN115917334A CN202180050905.8A CN202180050905A CN115917334A CN 115917334 A CN115917334 A CN 115917334A CN 202180050905 A CN202180050905 A CN 202180050905A CN 115917334 A CN115917334 A CN 115917334A
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- 238000001514 detection method Methods 0.000 title claims abstract description 118
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
- H02S50/10—Testing of PV devices, e.g. of PV modules or single PV cells
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/16—Measuring impedance of element or network through which a current is passing from another source, e.g. cable, power line
- G01R27/18—Measuring resistance to earth, i.e. line to ground
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
- H02S40/34—Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
- H02J2300/26—The renewable source being solar energy of photovoltaic origin involving maximum power point tracking control for photovoltaic sources
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
提供了一种阻抗检测方法(800,900,1000,1100)和光伏***(400,500,1200,1300,1400,1500,1600)，有助于降低阻抗检测的复杂度和成本。包括：在第一时间点和第二时间点分别对直流母线和地线(PE)之间的电压进行采样，得到第一电压值(U1)和第二电压值(U2)；在第一时间点和第二时间点分别对直流母线上的漏电流(Ircd)进行采样，得到第一电流值(Ircd1)和第二电流值(Ircd2)；基于第一电压值(U1)和第二电压值(U2)之间的差值，以及第一电流值(Ircd1)和第二电流值(Ircd2)之间的差值，计算汇流箱(1,2,…,M,240)的绝缘阻抗值(Rpv)，以确定汇流箱(1,2,…,M,240)的阻抗是否异常。
Description
PCT国内申请，说明书已公开。
Claims (20)
- PCT国内申请，权利要求书已公开。
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2021/075168 WO2022165691A1 (zh) | 2021-02-04 | 2021-02-04 | 阻抗检测方法和光伏*** |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115917334A true CN115917334A (zh) | 2023-04-04 |
| CN115917334A8 CN115917334A8 (zh) | 2024-05-10 |
Family
ID=82740697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180050905.8A Pending CN115917334A (zh) | 2021-02-04 | 2021-02-04 | 阻抗检测方法和光伏*** |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20230378908A1 (zh) |
| EP (1) | EP4290764A4 (zh) |
| CN (1) | CN115917334A (zh) |
| WO (1) | WO2022165691A1 (zh) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117538713A (zh) * | 2024-01-10 | 2024-02-09 | 京清数电(北京)技术有限公司 | 储能变流器及其绝缘检测电路、检测方法、装置和介质 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202015009364U1 (de) * | 2015-02-18 | 2017-04-06 | Sma Solar Technology Ag | Vorrichtung zur Isolationswiderstandsbestimmung an einem PV-Generator und Photovoltaikanlage |
| CN105606897B (zh) * | 2015-12-28 | 2019-02-26 | 哈密创动科技有限公司 | 支路绝缘阻抗监测及光伏发电方法、逆变器及光伏*** |
| CN106992550B (zh) * | 2017-05-26 | 2021-04-13 | 阳光电源股份有限公司 | 一种控制装置及汇流箱 |
| CN109600115B (zh) * | 2017-09-30 | 2020-12-29 | 丰郅(上海)新能源科技有限公司 | 在串联型的光伏发电***中定位故障的方法 |
| CN108267639B (zh) * | 2018-01-18 | 2020-02-21 | 清华大学 | 一种基于交流阻抗测试的太阳能电池并联电阻的测量方法 |
| CN109725202B (zh) * | 2018-12-27 | 2021-08-03 | 科华数据股份有限公司 | 多路mppt绝缘阻抗检测装置及方法 |
| CN109696582A (zh) * | 2019-02-26 | 2019-04-30 | 欣旺达电子股份有限公司 | 绝缘阻抗检测电路及其检测方法 |
| CN111610411A (zh) * | 2020-04-20 | 2020-09-01 | 华为技术有限公司 | 线缆绝缘阻抗检测方法和装置 |
| CN112311328A (zh) * | 2020-11-25 | 2021-02-02 | 珠海格力电器股份有限公司 | 绝缘阻抗检测电路、阻抗检测方法、变流器及光伏离心机 |
-
2021
- 2021-02-04 EP EP21923716.1A patent/EP4290764A4/en active Pending
- 2021-02-04 WO PCT/CN2021/075168 patent/WO2022165691A1/zh unknown
- 2021-02-04 CN CN202180050905.8A patent/CN115917334A/zh active Pending
-
2023
- 2023-08-03 US US18/364,669 patent/US20230378908A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN115917334A8 (zh) | 2024-05-10 |
| WO2022165691A1 (zh) | 2022-08-11 |
| EP4290764A1 (en) | 2023-12-13 |
| US20230378908A1 (en) | 2023-11-23 |
| EP4290764A4 (en) | 2024-03-06 |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
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| CI02 | Correction of invention patent application |
Correction item: PCT international application to national stage day Correct: 2023.02.21 False: 2023.02.17 Number: 14-01 Page: The title page Volume: 39 Correction item: PCT international application to national stage day Correct: 2023.02.21 False: 2023.02.17 Number: 14-01 Volume: 39 |
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| CI02 | Correction of invention patent application |