CN114531932A - 一种光伏发电系统、检测光伏组串对地故障的方法及设备 - Google Patents

一种光伏发电系统、检测光伏组串对地故障的方法及设备 Download PDF

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Publication number
CN114531932A
CN114531932A CN202080011340.8A CN202080011340A CN114531932A CN 114531932 A CN114531932 A CN 114531932A CN 202080011340 A CN202080011340 A CN 202080011340A CN 114531932 A CN114531932 A CN 114531932A
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China
Prior art keywords
voltage
photovoltaic
string
disturbance
ground
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Pending
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CN202080011340.8A
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English (en)
Inventor
杨波平
赵欢
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Huawei Digital Power Technologies Co Ltd
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Huawei Digital Power Technologies Co Ltd
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Publication of CN114531932A publication Critical patent/CN114531932A/zh
Pending legal-status Critical Current

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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
    • 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
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

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  • Photovoltaic Devices (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Control Of Electrical Variables (AREA)
  • Inverter Devices (AREA)

Abstract

本申请公开了一种光伏发电系统、检测光伏组串对地故障的方法及设备，系统中的功率变换电路与光伏组串一一对应；控制器获得电压扰动前各个光伏组串的端电压，端电压为光伏组串的正极对地电压或负极对地电压；对各个光伏组串分别进行电压扰动，分别获得电压扰动后各个光伏组串的端电压；根据每个光伏组串电压扰动前的端电压和电压扰动后的端电压确定对地故障的光伏组串；对对地故障的光伏组串，利用电压扰动前光伏组串的端电压和输出电压获得对地故障的光伏电池板，或利用电压扰动后光伏组串的端电压和输出电压获得对地故障的光伏电池板。该方案简单易于实现，不需增加任何硬件，不需要人工逐一检测，可自动确定对地故障的光伏电池板，效率高。

Description

PCT国内申请，说明书已公开。

Claims (23)

  1. PCT国内申请，权利要求书已公开。
CN202080011340.8A 2020-09-22 2020-09-22 一种光伏发电系统、检测光伏组串对地故障的方法及设备 Pending CN114531932A (zh)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/116710 WO2022061490A1 (zh) 2020-09-22 2020-09-22 一种光伏发电系统、检测光伏组串对地故障的方法及设备

Publications (1)

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CN114531932A true CN114531932A (zh) 2022-05-24

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US (1) US20230223902A1 (zh)
EP (1) EP4210219A4 (zh)
JP (1) JP2023542954A (zh)
CN (1) CN114531932A (zh)
AU (1) AU2020469182A1 (zh)
WO (1) WO2022061490A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023240978A1 (zh) * 2022-06-17 2023-12-21 阳光电源（上海）有限公司 一种光伏系统及其优化器组网方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114720771B (zh) * 2022-06-08 2022-11-15 阳光电源股份有限公司 一种逆变器及其交流绝缘阻抗检测方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102158129B (zh) * 2011-01-30 2013-04-17 浙江昱能光伏科技集成有限公司 太阳能光伏系统及其故障探测方法
US20130015875A1 (en) * 2011-07-13 2013-01-17 United Solar Ovonic Llc Failure detection system for photovoltaic array
US8933721B2 (en) * 2011-10-27 2015-01-13 Infineon Technologies Austria Ag Power source arrangement and method of diagnosing a power source arrangement
US9799779B2 (en) * 2013-11-08 2017-10-24 The Board Of Trustees Of The University Of Illinois Systems and methods for photovoltaic string protection
JP2016167933A (ja) * 2015-03-10 2016-09-15 株式会社東芝 故障検出装置
CN107086601B (zh) * 2017-05-18 2020-04-21 华为技术有限公司 一种光伏发电系统及电压补偿方法
CN108008176B (zh) * 2017-11-22 2019-11-12 福州大学 一种光伏阵列实时状态监测与故障定位系统
CN110768628B (zh) * 2018-07-27 2021-10-08 东南大学 一种光伏阵列故障检测方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023240978A1 (zh) * 2022-06-17 2023-12-21 阳光电源（上海）有限公司 一种光伏系统及其优化器组网方法

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JP2023542954A (ja) 2023-10-12
AU2020469182A9 (en) 2024-06-13
EP4210219A4 (en) 2023-09-06
WO2022061490A1 (zh) 2022-03-31
US20230223902A1 (en) 2023-07-13
AU2020469182A1 (en) 2023-05-11
EP4210219A1 (en) 2023-07-12

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