POWER FREQUENCY CHARACTERISTIC CONTROL STRATEGY OF VIRTUAL SYNCHRONOUS GENERATOR BASED ON LEADING DIFFERENTIAL CONTROL

Gao Changwei; Huang Chongyang; Guo Dan; Huang Zhidong

doi:10.19912/j.0254-0096.tynxb.2021-1566

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (4) : 359-370. DOI: 10.19912/j.0254-0096.tynxb.2021-1566

POWER FREQUENCY CHARACTERISTIC CONTROL STRATEGY OF VIRTUAL SYNCHRONOUS GENERATOR BASED ON LEADING DIFFERENTIAL CONTROL

Gao Changwei¹, Huang Chongyang², Guo Dan³, Huang Zhidong¹

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Abstract

This paper studies the control strategy of virtual synchronous generator（VSG） for grid-connected inverter of renewable energy units. In view of the contradiction between the dynamic regulation characteristics and the steady state performance of the traditional VSG, an improved virtual synchronous generator control strategy is proposed. Based on the analysis of the mathematical model of the traditional synchronous generator ontology control algorithm, the closed-loop transfer function of active power and the frequency fluctuation for the virtual synchronous generator is established. The influence mechanism of the inertia and damping on the active power response in the dynamic transition process is analyzed. The leading differential control and the inertial correction are introduced into the traditional VSG power frequency controller, a power frequency control strategy for improved virtual synchronous generator based on pre-derivative control is proposed. The closed-loop transfer function of active power and frequency fluctuation is established, and the power frequency characteristics in the off-grid and grid-connected state are analyzed. The power oscillation in the transition process can be effectively suppressed by adjusting the control parameters of the pre-derivative control link, and the decoupling control of VSG dynamic characteristics and steady-state performance is realized.

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renewable energy / virtual synchronous generator / power quality / frequency stability / leading differential control

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Gao Changwei, Huang Chongyang, Guo Dan, Huang Zhidong. POWER FREQUENCY CHARACTERISTIC CONTROL STRATEGY OF VIRTUAL SYNCHRONOUS GENERATOR BASED ON LEADING DIFFERENTIAL CONTROL[J]. Acta Energiae Solaris Sinica. 2023, 44(4): 359-370 https://doi.org/10.19912/j.0254-0096.tynxb.2021-1566

References

[1] ZHONG Q C, WEISS G.Synchronverters:inverters that mimic synchronous generators[J]. IEEE transactions on industrial electronics, 2011, 58(4): 1259-1267.
[2] 石荣亮, 张兴, 刘芳, 等. 基于虚拟同步发电机的多能互补微网运行控制技术[J]. 太阳能学报, 2017, 38(7): 1869-1876.
SHI R L, ZHANG X, LIU F, et al.Control technologies of multi-energy complementary microgrid operation based on virtual synchronous generator[J]. Acta energiae solaris sinica, 2017, 38(7): 1869-1876.
[3] 王倩, 孙大卫, 盛四清, 等. 内禀自同步虚拟同步发电机对系统低频振荡特性的影响[J]. 太阳能学报, 2021, 42(12): 410-418.
WANG Q, SUN D W, SHENG S Q, et al.Effect of virtual synchronous generator on low frequency oscillation characteristics of system[J]. Acta energiae solaris sinica, 2021, 42(12): 410-418.
[4] ALIPOOR J, MIURA Y, ISE T.Power system stabilization using virtual synchronous generator with alternating moment of inertia[J]. IEEE journal of emerging and selected topics in power electronics, 2015, 3(2): 451-458.
[5] LI J, WEN B Y, WANG H Y.Adaptive virtual inertia control strategy of VSG for micro-grid based on improved bang-bang control strategy[J]. IEEE access, 2019, 7: 39509-39514.
[6] 章伟明, 赵巧娥, 刘毓梅, 等. 孤岛模式自适应转动惯量VSG逆变电源控制策略[J]. 电力系统及其自动化学报, 2019, 31(2): 95-100.
ZHANG W M, ZHAO Q E, LIU Y M,et al.VSG inverter power source control strategy with adaptive rotary inertia in island mode[J]. Proceedings of the CSU-EPSA, 2019, 31(2): 95-100.
[7] 党克, 田勇, 刘子源, 等. 串联制动电阻提高VSG的LVRT能力和功角稳定研究[J]. 太阳能学报, 2022, 43(1): 323-328.
DANG K, TIAN Y, LIU Z Y, et al.Study on improving LVRT capability and power angle stability of VSG by series breaking resistor[J]. Acta energiae solaris sinica, 2022, 43(1): 323-328.
[8] 李东东, 朱钱唯, 程云志, 等. 基于自适应惯量阻尼综合控制算法的虚拟同步发电机控制策略[J]. 电力自动化设备, 2017, 37(11): 72-77.
LI D D, ZHU Q W, CHENG Y Z, et al.Control strategy of virtual synchronous generator based on self-adaptive rotor inertia and damping combination control algorithm[J]. Electric power automation equipment, 2017, 37(11): 72-77.
[9] 李明烜, 王跃, 徐宁一, 等. 基于带通阻尼功率反馈的虚拟同步发电机控制策略[J]. 电工技术学报, 2018, 33(10): 2176-2185.
LI M X, WANG Y, XU N Y, et al.Virtual synchronous generator control strategy based on bandpass damping power feedback[J]. Transactions of China Electrotechnical Society, 2018, 33(10): 2176-2185.
[10] 刘尧, 陈建福, 侯小超, 等. 基于自适应虚拟惯性的微电网动态频率稳定控制策略[J]. 电力系统自动化, 2018, 42(9): 75-82.
LIU Y, CHEN J F, HOU X C, et al.Dynamic frequency stability control strategy of microgrid based on adaptive virtual inertia[J]. Automation of electric power systems, 2018, 42(9): 75-82.
[11] 殷桂梁, 董浩, 代亚超. 光伏微网中虚拟同步发电机参数自适应控制策略[J]. 电网技术, 2020, 44(1): 192-199.
YIN G L, DONG H, DAI Y C.Adaptive control strategy of VSG parameters in photovoltaic microgrid[J]. Power system technology, 2020, 44(1): 192-199.
[12] KERDPHOL T, RAHMAN F S, MITANI Y, et al.Robust virtual inertia control of an islanded microgrid considering high penetration of renewable energy[J]. IEEE access, 2017, 6: 625-636.
[13] 梁荣伟, 吕智林. 基于频率偏差积分补偿的VSG控制策略[J]. 电力电子技术, 2020, 54(5): 50-55.
LIANG R W, LYU Z L.VSG control strategy based on frequency deviation integral compensation[J]. Power electronics, 2020, 54(5): 50-55.
[14] 高长伟, 刘晓明, 樊爱龙. 分布式逆变电源改进型虚拟同步发电机控制策略研究[J]. 太阳能学报, 2020, 41(12): 33-39.
GAO C W, LIU X M, FAN A L.Control strategy of improved virtual synchronous generator for distributed generation[J]. Acta energiae solaris sinica, 2020, 41(12): 33-39.
[15] 乔鹏, 汪海宁. 电网频率偏差下虚拟同步发电机改进控制研究[J]. 电测与仪表, 2018, 55(6): 89-95.
QIAO P, WANG H N.Improved control strategy of virtual synchronous generator under grid frequency deviation[J]. Electrical measurement & instrumentation, 2018, 55(6): 89-95.
[16] 袁敞, 刘昌, 赵天扬, 等. 基于储能物理约束的虚拟同步机运行边界研究[J]. 中国电机工程学报, 2017, 37(2): 506-515.
YUAN C, LIU C, ZHAO T Y, et al.Research on operating boundary of virtual synchronous machine based on physical constraint of energy storage system[J]. Proceedings of the CSEE, 2017, 37(2): 506-515.
[17] 李吉祥, 赵晋斌, 屈克庆. 考虑SOC特性的微电网VSG运行参数边界分析[J]. 电网技术, 2018, 42(5): 1451-1457.
LI J X, ZHAO J B, QU K Q.Boundary analysis of operation parameters of microgrid VSG considering SOC characteristics[J]. Power system technology, 2018, 42(5) : 1451-1457.
[18] 田铭兴, 路涛涛, 贾志博, 等. 基于虚拟同步发电机控制的光/储/燃料电池微电网能量管理[J]. 电力自动化设备, 2019, 39(5): 89-95.
TIAN M X,LU T T, JIA Z B, et al.Energy management of photovoltaic-storage-fuel cell microgrid based on virtual synchronous generator control[J]. Electric power automation equipment, 2019, 39(5): 89-95.
[19] 胡超, 张兴, 石荣亮, 等. 独立微电网中基于自适应权重系数的VSG协调控制策略[J]. 中国电机工程学报, 2017, 37(2): 516-524.
HU C, ZHANG X, SHI R L, et al.VSG coordinated control based on adaptive weight factors in islanded microgrids[J]. Proceedings of the CSEE, 2017, 37(2): 516-524.
[20] 孟建辉, 彭嘉琳, 王毅, 等. 多约束下光储系统的灵活虚拟惯性控制方法[J]. 电工技术学报, 2019, 34(14): 3046-3058.
MENG J H, PENG J L, WANG Y, et al.Multi-constrained flexible virtual inertial control method for photovoltaic energy storage system[J]. Transactions of China Electrotechnical Society, 2019, 34(14): 3046-3058.
[21] 王逸超, 李湘旗, 陈仲伟, 等. 一种光储独立并网式虚拟同步发电机控制方法[J]. 太阳能学报, 2022, 43(1): 249-255.
WANG Y C, LI X Q, CHEN Z W, et al.A virtual synchronous generator control method based on independent grid—connected structure of photovoltaic system and energy storage system[J]. Acta energiae solaris sinica, 2022, 43(1): 249-255.
[22] 张福民, 白松, 李占凯, 等. 基于VSG技术的微电网储能荷电状态控制策略[J]. 电网技术, 2019, 43(6): 2109-2115.
ZHANG F M, BAI S, LI Z K, et al.Control strategy for microgrid storage system's state of charge based on virtual synchronous generator[J]. Power system technology, 2019, 43(6): 2109-2115.
[23] 孟建辉, 彭嘉琳, 王毅, 等. 考虑储能荷电状态及频率恢复特性的改进型灵活虚拟惯性控制[J]. 电力自动化设备, 2020, 40(6): 100-107, 114.
MENG J H, PENG J L, WANG Y, et al.Improved flexible virtual inertial control considering SOC of energy storage and characteristics of frequency recovery[J]. Electric power automation equipment, 2020, 40(6): 100-107, 114.
[24] GOLPRIRA H, MESSINA A R, BEVRANI H.Emulation of virtual inertia to accommodate higher penetration levels of distributed generation in power grids[J]. IEEE transactions on power systems, 2019, 34(5): 3384-3394.