A novel current-only directional element criterion for distribution networks with distributed photovoltaic generation

XUE Shimin; ZHANG Yaowen; LI Yuexuan; LI Hongxin; LI Bin; LI Botong

doi:10.19783/j.cnki.pspc.251356

English Version Journal Login

您当前的位置：

首页 >

文章列表页 >

A novel current-only directional element criterion for distribution networks with distributed photovoltaic generation

更新时间：2026-07-27

- A novel current-only directional element criterion for distribution networks with distributed photovoltaic generation
- Power System Protection and Control Vol. 54, Issue 12, (2026)
- 作者机构：
  
  智能配用电装备与系统全国重点实验室 (天津),天津,300072
- 作者简介：
- 基金信息：
- DOI：10.19783/j.cnki.pspc.251356
  CLC：
- Published：2026
- 稿件说明：
移动端阅览
XUE Shimin, ZHANG Yaowen, LI Yuexuan, et al. A novel current-only directional element criterion for distribution networks with distributed photovoltaic generation[J]. Power System Protection and Control, 2026, 54(12).
DOI：

XUE Shimin, ZHANG Yaowen, LI Yuexuan, et al. A novel current-only directional element criterion for distribution networks with distributed photovoltaic generation[J]. Power System Protection and Control, 2026, 54(12). DOI： 10.19783/j.cnki.pspc.251356.

摘要

分布式光伏配电网中三段式电流保护需加装方向元件，传统功率方向元件在光伏低电压穿越与负序电流抑制策略的影响下易出现拒动和误动的问题，且需安装电压互感器。针对此，提出一种适用于分布式光伏配电网的无压方向元件新判据。首先，在无法获取保护背侧系统拓扑结构和多光伏信息的情况下，提出一种将分布式光伏配电网简化为单光伏配电网的等效方法。在此基础上，建立复合序网，分析系统发生正向和反向故障时序电流间的相位关系，构建基于流过保护安装处的负序电流与同一母线上无源支路的正序电流间相位差的新型无压方向判据。经过分析，该方向元件具有无需安装电压互感器、不受过渡电阻影响和适用于高比例光伏接入场景等显著优点。最后，PSCAD 仿真算例验证了所提方向元件的性能优势和简化等效方法的精确性。

Abstract

Three-stage overcurrent protection in distribution networks with distributed photovoltaic (PV) generation requires directional elements. However

traditional power directional elements are prone to maloperation and failure to operate under the influence of PV low voltage ride-through and negative-sequence current suppression strategies

and they also require voltage transformers. To address these issue

this paper proposes a novel criterion for current-only directional element suitable for distribution networks with distributed PV generation. First

in situations where the topology of the system behind the protection device and information on multiple PV units are unavailable

this paper proposes an equivalent method to simplify the distribution network with multiple distributed PV units into an equivalent single PV network. Based on this equivalent model

a composite sequence network is established

and the phase relationships among sequence currents under forward and reverse faults are analyzed. Subsequently

a novel current-only directional criterion is proposed based on the phase difference between the negative-sequence current flowing through the protected line and the positive-sequence current of a passive branch connected to the same bus. The analysis reveals that this directional element offers significant advantages

including applicability to scenarios with high PV penetration

eliminating the need for voltage transformers

and immune to transient resistances. Finally

PSCAD-based simulations verify the performance advantages of the proposed directional element and the accuracy of this simplified equivalent method.

关键词

Keywords

references

DONG F, SHI M, KANG K. Review of existing policies and prospects for green power and green certificates in a dual-carbon context[J]. Energy for Sustainable Development, 2025, 88.

FANG H, SHANG L, DONG X, et al. High proportion of distributed PV reliability planning method based on big data[J]. Energies, 2023, 16(23).

ZHAO J, ZENG F. Research on single-phase grounding characteristics of low-resistance grounding systems with distributed generation[J]. International Journal of Electrical Power and Energy Systems, 2025, 172.

WANG Y, WEI G, YANG H, et al. Novel protection scheme of single-phase earth fault for radial distribution systems with distributed generators[J]. IEEE Transactions on Power Delivery, 2018, 33(2): 541-548.

SURYANARAYANA G, SAUMENDRA S. A novel complex current ratio-based technique for transmission line protection[J]. Protection and Control of Modern Power Systems, 2020, 5(1): 1-9.

ZANG L, ZOU G, ZHOU C, et al. A d-axis based current differential protection scheme for an active distribution network[J]. Protection and Control of Modern Power Systems, 2022, 7(2): 138-148.

AMIR G, HASAN M. Distance protection with fault resistance compensation for lines connected to PV plant[J]. International Journal of Electrical Power and Energy Systems, 2023, 148.

HE C, YANG B. Applicability analysis of directional components in AC/DC hybrid system[J]. IOP Conference Series: Earth and Environmental Science, 2020, 514(4).

WANG X, RONG Y, LIANG D, et al. Data-driven fast voltage control in non-DPMU distribution networks with microgrids[J]. Frontiers in Energy Research, 2022, 10.

XUE S, SHI Z, HUANG R, et al. A criterion for non- voltage directional elements applied in AC networks connected with VSC-based interconnection devices[J]. IEEJ Transactions on Electrical and Electronic Engineering, 2018, 13(4): 587-594.

ZHANG Y, ZHU Y, ZHANG Z, et al. Research on DC line protection method of large PV plant based on transient direction[J]. Journal of Physics: Conference Series, 2022, 2401(1).

MA Y, GUO W, SHI Y, et al. Fault line selection in distribution networks based on dual-channel time-frequency fusion network[J]. Mathematics, 2025, 13(16): 2687-2687.

HUANG X, FAN Y, LI W, et al. Research on line selection method based on active injection under DC feeder single-pole groundingfault[J]. Energies, 2025, 18(18): 4958-4958.

分布式电源并网技术要求: GB/T 33593-2017[S]. 北京:中国标准出版社, 2017.

Technical requirements for grid connection of distributed resources: GB/T 33593-2017[S]. Beijing: Standards Press of China, 2017.

SELIM F, ALY M, MEGAHED F T, et al. Low voltage ride through enhancement techniques on photovoltaic systems: a comprehensive review[J]. Applied Energy, 2026, 402.

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Load restoration method for distribution networks considering distributed energy storage aggregation and emergency resource coordination

A bi-level energy storage planning method for enhancing the hosting region of distribution networks

An intra-regional node criticality assessment method based on the integrated electrical-topological characteristics of distribution networks

Transient modeling and analytical study of a thyristor-controlled series-parallel medium-voltage distribution transformer

A new traveling-wave location method in distribution networks based on virtual fault mapping

Related Author

PAN Li

LIU Junyong

GAO Hongjun

LIU Jingrong

LI Haibo

MA Tengfei

WANG Ziyao

YU Xueying

Related Institution

College of Electrical Engineering, Sichuan University

新型电力系统运行与控制全国重点实验室(清华大学电机系)

国网上海电力科学研究院

中国电力科学研究院有限公司

电网防灾减灾全国重点实验室(长沙理工大学)

AI问答

⁰