FAULT DIAGNOSIS AND PROTECTION STRATEGY FOR PHOTOVOLTAIC DC-DC CONVERTER

Zhang Xinyu; Fan Yanfang; Ma Jian; Wang Yibo

doi:10.19912/j.0254-0096.tynxb.2021-0511

PDF(2081 KB)

Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (11) : 68-77. DOI: 10.19912/j.0254-0096.tynxb.2021-0511

FAULT DIAGNOSIS AND PROTECTION STRATEGY FOR PHOTOVOLTAIC DC-DC CONVERTER

Zhang Xinyu^1,2, Fan Yanfang¹, Ma Jian², Wang Yibo³

Author information +

History +

Abstract

Taking the input-parallel output-series（IPOS）type boost full bridge isolated converter（BFBIC）as the research object. Aiming at the problem that its internal fault cannot be located quickly after it occurs,a fault diagnosis strategy based on the waveform integration method is proposed. This strategy selects fixed measuring points inside the converter, analyzes the waveform characteristics of each electrical quantity when the converter has a hard fault or a DC collection line fault based on the operating mechanism, and identifies the fault location by summarizing the characteristic rules. Aiming at the problem that the existing redundant bridge arm scheme is not applicable to BFBIC-IPOS, a protection strategy using redundant boost units to achieve internal fault ride-through is proposed. This strategy avoids over-current and over-voltage problems in the switching process of the boost unit by changing the device parameters and the standby state of the redundant unit. Finally,through PSIM modeling and simulation,the effectiveness of the fault diagnosis strategy and the redundancy protection strategy is verified.

Key words

photovoltaic power generation / DC-DC converters / failure analysis / fault diagnosis / fault ride-through

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

Zhang Xinyu, Fan Yanfang, Ma Jian, Wang Yibo. FAULT DIAGNOSIS AND PROTECTION STRATEGY FOR PHOTOVOLTAIC DC-DC CONVERTER[J]. Acta Energiae Solaris Sinica. 2022, 43(11): 68-77 https://doi.org/10.19912/j.0254-0096.tynxb.2021-0511

References

[1] 张运洲, 张宁, 代红才, 等. 中国电力系统低碳发展分析模型构建与转型路径比较[J]. 中国电力, 2021, 54(3): 1-11.
ZHANG Y Z, ZHANG N, DAI H C,et al.Model construction and pathways of low-carbon transition of China’s power system[J]. Electric power, 2021, 54(3): 1-11.
[2] 鞠昌斌, 王环, 孟姗姗, 等. 大功率、高变比光伏高压直流并网变换器[J]. 太阳能学报, 2018, 39(2): 572-582.
JU C B, WANG H, MENG S S, et al.High power and high ratio of PV high voltage DC grid connected converter[J]. Acta energiae solaris sinica, 2018, 39(2): 572-582.
[3] 周廷冬, 徐永海. 基于MMC的配电网电力电子变压器故障特性分析[J]. 电工电能新技术, 2017, 36(5): 34-41.
ZHOU T D, XU Y H.Fault characteristic analysis of power electronic transformer based on MMC in distribution network[J]. Advanced technology of electrical engineering and energy, 2017, 36(5): 34-41.
[4] 马铭遥, 熊鹏博, 孟雪松, 等. 基于光伏并网逆变器直流过压故障的暂态分析及故障成因定位[J]. 高电压技术, 2021, 47(1): 187-197.
MA M Y, XIONG P B, MENG X S, et al.Transient analysis and fault cause location of DC overvoltage fault based on photovoltaic grid connected inverter[J]. High voltage engineering, 2021, 47(1): 187-197.
[5] 彭锦凤. 电力电子变换器的小世界网络特性及其故障分析[D]. 广州: 华南理工大学, 2010: 35-43.
PENG J F.Small-world network characteristic and failure analysis of power electronic converters[D]. Guangzhou: South China University of Technology, 2010: 35-43.
[6] 王熙乾, 高雪莲, 史丽鹏. 基于WOA-PNN算法的电力电子电路故障诊断分析[J]. 微电子学, 2020,50(2): 232-235.
WANG X Q, GAO X L, SHI L P.Fault diagnosis analysis of power electronic circuits based on WOA-PNN algorithm[J]. Microelectronics, 2020, 50(2): 232-235.
[7] 丘东元, 彭锦凤, 张波. 电力电子变换器结构性故障的有向图论诊断方法[J]. 电机与控制学报, 2010, 14(8): 13-18.
QIU D Y, PENG J F, ZHANG B.Structural fault diagnosis method of power electronic converter by directed graph theory[J]. Electric machines and control, 2010, 14(8): 13-18.
[8] 李探, 赵成勇, 李路遥, 等. MMC-HVDC子模块故障诊断与就地保护策略[J]. 中国电机工程学报, 2014, 34(10): 1641-1649.
LI T, ZHAO C Y, LI L Y, et al.Sub-module fault diagnosis and the local protection scheme for MMC-HVDC system[J]. Proceedings of the CSEE, 2014, 34(10): 1641-1649.
[9] 董晓锋, 吴红飞, 陆杨军, 等. 模块化光伏直流并网系统分布式自主控制策略[J]. 电力系统自动化, 2018, 42(19): 126-132.
DONG X F, WU H F, LU Y J, et al.Distributed autonomous control strategy for modular photovoltaic DC grid-connected system[J]. Automation of electric power systems, 2018, 42(19): 126-132.
[10] 胡洋凯. 电力电子变压器故障分析与保护系统设计研究[D]. 长沙: 湖南大学, 2016.
HU Y K.Resreach on the fault analysis and protection system design of power electronic transformer[D]. Changsha: Hunan University, 2016.
[11] 周廷冬. MMC型电力电子变压器故障特性分析及保护技术研究[D]. 北京: 华北电力大学, 2018.
ZHOU T D.Research on fault characteristic analysis and protection technology for MMC based power electronic transformer[D]. Beijing: North China Electric Power University, 2018.
[12] PRASANNA U R, RATHORE A K.Extended range ZVS active-clamped current-fed full-bridge isolated DC/DC converter for fuel cell applications: analysis, design, and experimental results[J]. IEEE transactions on industrial electronics, 2013, 60(7): 2661-2672.
[13] 马健, 樊艳芳, 王一波, 等. 适用于集中型光伏直流升压变换器的MPPT策略[J]. 太阳能学报, 2020, 43(5): 137-145.
MA J, FAN Y F, WANG Y B, et al.Maximum power point tracking strategy for centralized photovoltaic DC-DC converter[J]. Acta energiae solaris sinica, 2020, 43(5): 137-145.
[14] DOU D G, WANG Y B, ZHOU Y, et al.Research on Interleaving control strategy on BFBIC-IPOS[C]//2020 IEEE 9th International Power Electronics and Motion Control Conference, Nanjing, China, 2020: 950-954.
[15] SONG X Q, PENG C, HUANG A Q.A medium-voltage hybrid DC circuit breaker, Part I: solid-state main breaker based on 15 kV SiC emitter turn-off thyristor[J]. IEEE journal of emerging and selected topics in power electronics, 2017, 5(1): 278-288.