GRID VOLTAGE SENSORLESS VSG CONTROL STRATEGY BASED ON STATIC COORDINATE SYSTEM

被引：0

作者：

Zhang, Bin ^{[1
]}

Wei, Gan ^{[1
]}

Wang, Xinda ^{[2
]}

Zhang, Xiangjun ^{[1
]}

Yang, Hua ^{[1
]}

Zhang, Xueguang ^{[1
]}

机构：

[1] School of Electrical Engineering, Harbin Institute of Technology, Harbin

[2] Electric Power Research Institute, State Grid Jiangsu Electric Power Co., Ltd., Nanjing

来源：

Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2024年 / 45卷 / 08期

关键词：

flux linkage; power converters; sensorless control; static coordinate system; virtual synchronous control;

D O I：

10.19912/j.0254-0096.tynxb.2023-0587

中图分类号：

学科分类号：

摘要：

This paper proposes an improved flux observer based on a series structure of a first order low-pass filter and a high pass filter to solve the DC offset problem of grid voltage sensorless strategy using the virtual flux algorithm, by utilizing this improved flux observer to derive the virtual flux, the precision of observation is enhanced. Based on the virtual flux obtained, a calculation structure of grid angular frequency is proposed using the idea of phase locked loop for different grid frequency operating conditions, and the grid voltage is reconstructed from the relationship between the virtual flux and voltage. In addition, the proposed grid voltage sensorless strategy is applied to the grid side converter system, and a virtual synchronous control structure is designed in a two-phase static coordinate system. Compared to a rotating coordinate system, the decoupling process of the control inner loop can be omitted, while the coordinate transformation process can be simplified, avoiding the instability factors caused by inaccurate angles in coordinate transformation. Finally, simulation and experiments verify the effectiveness and reliability of the proposed control strategy and flux observer. © 2024 Science Press. All rights reserved.

引用

页码：174 / 181

页数：7

共 20 条

[1]

LIU H, SUN D W, SONG P, Et al., Influence of voltage loop on stability of photovoltaic virtual synchronous gen erators, Acta energiae solaris sinica, 42, 3, pp. 311-318, (2021)

[2]

LISERRE M, WANG X F., Guest editorial:special section on modeling, topology, and control of grid-forming inverters[J], IEEE journal of emerging and selected topics in power electronics, 8, 2, pp. 923-924, (2020)

[3]

PAN D H, WANG X F, LIU F C, Et al., Transient stability of voltage-source converters with grid-forming control:a design-oriented study[J], IEEE journal of emerging and selected topics in power electronics, 8, 2, pp. 1019-1033, (2020)

[4]

CHEN M, ZHOU D, BLAABJERG F., Active power oscillation damping based on acceleration control in paralleled virtual synchronous generators system[J], IEEE transactions on power electronics, 36, 8, pp. 9501-9510, (2021)

[5]

HE Y, HU H M, YANG H D, Et al., VSG parallel control strategy based on secondary voltage regulation[C], 2022 7th Asia Conference on Power and Electrical Engineering (ACPEE), pp. 1562-1567, (2022)

[6]

YU Y, CHAUDHARY S K, TINAJERO G D A, Et al., A reference-feedforward-based damping method for virtual synchronous generator control[J], IEEE transactions on power electronics, 37, 7, pp. 7566-7571, (2022)

[7]

ZHANG S Y., Stability analysis of three-phase voltage source converters and switching control of mode, (2021)

[8]

KAZEM BAKHSHIZADEH M, WANG X F, BLAABJERG F, Et al., Couplings in phase domain impedance modeling of grid-connected converters, IEEE transactions on power electronics, 31, 10, pp. 6792-6796, (2016)

[9]

YANG M, GAO L J, WANG H X, Et al., Coordinate control of power and current for virtual synchronous generator under unbalanced grid voltage, Power system protection and control, 47, 6, pp. 17-23, (2019)

[10]

ZHOU B K, HE Y C, ZOU Y T, Et al., An inner-loop control method for the filter-less, voltage sensor-less, and PLL-less grid-following inverter-based resource, 2022 IEEE Applied Power Electronics Conference and Exposition(APEC), pp. 1425-1429, (2022)

← 1 2 →