STUDY ON LOW VOLTAGE RIDE THROUGH CONTROL STRATEGY BASED ON VSG

Zhu Zuobin; Sun Shumin; Ding Yueming; Zhang Changyou

doi:10.19912/j.0254-0096.tynxb.2022-1661

PDF(3369 KB)

Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (2) : 376-383. DOI: 10.19912/j.0254-0096.tynxb.2022-1661

STUDY ON LOW VOLTAGE RIDE THROUGH CONTROL STRATEGY BASED ON VSG

Zhu Zuobin^1,2, Sun Shumin^1,2, Ding Yueming³, Zhang Changyou⁴

Author information +

History +

Abstract

When the power grid fails, VSG is difficult to support the stable operation of voltage and frequency of the microgrid system. In order to make the inverter operate stably without disconnection, and have the ability to suppress fault impulse current, this paper proposes a VSG low voltage ride through（LVRT） control strategy with active and reactive power compensation. Firstly, based on the conventional VSG, the transient characteristics of VSG when short circuit fault occurs are analyzed. Secondly, in view of the problems existing in VSG under fault condition, active power is compensated for active power and reactive power is compensated for reactive power. The eletric potential in VSG increases due to reactive power compensation. The given voltage is reset and calculated, and the short-circuit fault reference current is adjusted under the limit. Finally, the simulation model of active and reactive compensation VSG LVRT control strategy is established for simulation test. The test results show that the improved VSG control strategy can not only realize active compensation and flexible adjustment of VSG output power angle during voltage sag fault, but also realize reactive compensation to effectively support VSG output voltage and suppress voltage drop, compared with the conventional VSG/active compensation VSG control strategy. At the same time, it can better restrain the fault impulse current and improve the transient stability of the system.

Key words

microgrid / voltage drop / fault current / transient stability / low voltage ride through

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

Zhu Zuobin, Sun Shumin, Ding Yueming, Zhang Changyou. STUDY ON LOW VOLTAGE RIDE THROUGH CONTROL STRATEGY BASED ON VSG[J]. Acta Energiae Solaris Sinica. 2024, 45(2): 376-383 https://doi.org/10.19912/j.0254-0096.tynxb.2022-1661

References

[1] 董凌, 李延和, 刘锋, 等. 区域全清洁能源供电的发展路径与实践: 以青海省为例[J]. 全球能源互联网, 2020, 3(4): 385-392.
DONG L, LI Y H, LIU F, et al.Development path and practice of regional fully clean power supply: a case study of Qinghai Province[J]. Journal of global energy interconnection, 2020, 3(4): 385-392.
[2] 郑涛, 王子鸣, 邹芃蓥. 基于相位跳变补偿的虚拟同步发电机低电压穿越控制策略研究[J]. 电网技术, 2023, 47(1): 100-109.
ZHENG T, WANG Z M, ZOU P Y.Research on low voltage ride-through control strategy of virtual synchronous generator based on phase jump compensation[J]. Power system technology, 2023, 47(1): 100-109.
[3] LI F, LIU G H, ZHU K, et al.An improved control strategy of virtual synchronous generator under unbalanced conditions[C]//2018 IEEE 4th Southern Power Electronics Conference (SPEC). Singapore, 2019: 1-6.
[4] 卢方舟, 何安然, 侯凯, 等. 基于全通滤波器的虚拟同步发电机低电压穿越控制策略[J]. 电力自动化设备, 2019, 39(5): 176-181.
LU F Z, HE A R, HOU K, et al.Low-voltage ride-through control strategy of virtual synchronous generator based on all-pass filter[J]. Electric power automation equipment, 2019, 39(5): 176-181.
[5] 董纪清, 潘佳清, 毛行奎. 自适应正负序复合控制的VSG低电压穿越策略[J]. 电网技术, 2023, 47(2): 815-822.
DONG J Q, PAN J Q, MAO X K.Low voltage ride-through strategy of VSG based on adaptive positive and negative sequence composite control[J]. Power system technology, 2023, 47(2): 815-822.
[6] JIANG F, CHENG S J, TU C M, et al.Design consideration of a dual-functional bridge-type fault current limiter[J]. IEEE journal of emerging and selected topics in power electronics, 2020, 8(4): 3825-3834.
[7] CHEN L, LI G C, CHEN H K, et al.Investigation of a modified flux-coupling-type SFCL for low-voltage ride-through fulfillment of a virtual synchronous generator[J]. IEEE transactions on applied superconductivity, 2020, 30(4): 5601006.
[8] TAUL M G, WANG X F, DAVARI P, et al.Current limiting control with enhanced dynamics of grid-forming converters during fault conditions[J]. IEEE journal of emerging and selected topics in power electronics, 2020, 8(2): 1062-1073.
[9] CHEN Z, PEI X J, YANG M, et al.A novel protection scheme for inverter-interfaced microgrid (IIM) operated in islanded mode[J]. IEEE transactions on power electronics, 2018, 33(9): 7684-7697.
[10] LI Y Y, LI W T, GUO L L, et al.Current sensor-less virtual synchronous generator model predictive control based on sliding mode observer[J]. IEEE access, 2021, 9: 17898-17908.
[11] 王雪梅, 王艺博, 刘雨桐, 等. 基于虚拟电抗的主动支撑型新能源机组低电压穿越控制方法[J]. 电网技术, 2022, 46(11): 4435-4444.
WANG X M, WANG Y B, LIU Y T, et al.Low voltage ride-through control of actively-supported new energy unit based on virtual reactance[J]. Power system technology, 2022, 46(11): 4435-4444.
[12] KOIWA K, INOO K, ZANMA T, et al.Virtual voltage control of VSG for overcurrent suppression under symmetrical and asymmetrical voltage dips[J]. IEEE transactions on industrial electronics, 2022, 69(11): 11177-11186.
[13] WU H, WANG X F.A mode-adaptive power-angle control method for transient stability enhancement of virtual synchronous generators[J]. IEEE journal of emerging and selected topics in power electronics, 2020, 8(2): 1034-1049.
[14] LIU T, WANG X F.Transient stability of single-loop voltage-magnitude controlled grid-forming converters[J]. IEEE transactions on power electronics, 2021, 36(6): 6158-6162.
[15] YANG Y, MIAO H Y, CHEN H F, et al.Voltage sag ride-through control strategy with reactive power compensation for virtual synchronous generator[C]//2018 13th IEEE Conference on Industrial Electronics and Applications (ICIEA). Wuhan, China, 2018: 1140-1146.
[16] 李华, 高怀正, 郝悦, 等. 基于虚拟同步发电机低电压穿越的无缝切换控制策略[J]. 太阳能学报, 2021, 42(3): 114-120.
LI H, GAO H Z, HAO Y, et al.Seamless switching control strategy for low voltage ride-through based on virtual synchronous generator[J]. Acta energiae solaris sinica, 2021, 42(3): 114-120.
[17] SHI K, YE H H, XU P F, et al.Low-voltage ride through control strategy of virtual synchronous generator based on the analysis of excitation state[J]. IET generation, transmission & distribution, 2018, 12(9): 2165-2172.
[18] WANG H N, ZHANG Q H, WU D, et al.Advanced current-droop control for storage converters for fault ride-through enhancement[J]. IEEE journal of emerging and selected topics in power electronics, 2020, 8(3): 2461-2474.
[19] LI Z L, CHAN K W, HU J F, et al.An adaptive fault ride-through scheme for grid-forming inverters under asymmetrical grid faults[J]. IEEE transactions on industrial electronics, 2022, 69(12): 12912-12923.
[20] 刘航, 王跃, 刘永慧, 等. 基于定量设计虚拟阻抗的VSG低电压穿越策略[J]. 高电压技术, 2022, 48(1): 245-256.
LIU H, WANG Y, LIU Y H, et al.The LVRT strategy for VSG based on the quantitatively designed virtual impedance[J]. High voltage engineering, 2022, 48(1): 245-256.
[21] 张余余, 赵晋斌, 李芬, 等. 基于功角动态补偿的VSG故障穿越方法研究[J]. 电网技术, 2021, 45(9): 3667-3673.
ZHANG Y Y, ZHAO J B, LI F, et al.VSG fault crossing method based on dynamic compensation of power angle[J]. Power system technology, 2021, 45(9): 3667-3673.