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1.国网江苏省电力有限公司电力科学研究院,江苏省南京市 211103
2.南京工程学院电力工程学院,江苏省南京市 211167
Received:22 March 2022,
Revised:2022-04-14,
Published Online:07 November 2022,
Published:25 December 2022
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姜云龙,司鑫尧,史鸿飞等.弱电网下计及锁相环影响的并网逆变器稳定性提升方法[J].电力系统自动化,2022,46(24):113-120.
JIANG Yunlong,SI Xinyao,SHI Hongfei,et al.Stability Improvement Method of Grid-connected Inverter Considering Phase-locked Loop Effect in Weak Grid[J].Automation of Electric Power Systems,2022,46(24):113-120.
姜云龙,司鑫尧,史鸿飞等.弱电网下计及锁相环影响的并网逆变器稳定性提升方法[J].电力系统自动化,2022,46(24):113-120. DOI: 10.7500/AEPS20220322002.
JIANG Yunlong,SI Xinyao,SHI Hongfei,et al.Stability Improvement Method of Grid-connected Inverter Considering Phase-locked Loop Effect in Weak Grid[J].Automation of Electric Power Systems,2022,46(24):113-120. DOI: 10.7500/AEPS20220322002.
并网逆变器通常使用锁相环获取电网电压同步信息。在弱电网中,电网阻抗不可忽略,公共耦合点处的电压扰动使得锁相环输出相角存在偏差,从而影响对并网电流的控制,不利于并网逆变器的稳定运行。为抑制锁相环引入的扰动、增强并网系统的稳定性,提出一种基于非理想广义积分器的改进小信号补偿控制方法。首先,在
dq
坐标系下建立考虑锁相环影响的LCL型三相并网逆变器小信号模型。然后,分析加入小信号补偿前后并网逆变器等效输出阻抗的变化特征,针对小信号补偿方法对稳定裕度的提升效果随频率升高减弱这一问题,在小信号补偿的基础上加入微分补偿通路,微分项由非理想广义积分器等效替代。在电网阻抗宽范围变化时,采用所提方法可以确保并网逆变器始终保持良好的稳定裕度,增强了并网逆变器的稳定性和动态性能。最后,通过实验验证了理论分析的正确性和所提方法的有效性。
The grid-connected inverter usually uses the phase-locked loop (PLL) to obtain the grid voltage synchronization information. In a weak grid
the grid impedance cannot be ignored. The voltage disturbance at the common coupling point leads to the output phase angle deviation of the PLL
and then affects the control of the grid-connected current
which is not conducive to the stable operation of the grid-connected inverter. In order to suppress the disturbance introduced by the PLL and enhance the stability of the grid-connected system
an improved small-signal compensation control method based on a non-ideal generalized integrator is proposed. First
the small-signal model of an LCL three-phase grid-connected inverter with the influence of the PLL is established in the
dq
coordinate system. Then
the variation characteristics of the equivalent output impedance of the grid-connected inverter with and without small-signal compensation are analyzed. For the problem that the improvement effect of the small-signal compensation method on stability margin declines with the increasing frequency
a differential compensation path is introduced based on the small-signal compensation
in which the differential term is equivalently replaced by a non-ideal generalized integrator. When the grid impedance changes in a wide range
the proposed method can ensure a good stability margin for the grid-connected inverter
and enhance the stability and dynamic performance of the grid-connected inverter. Finally
the correctness of the theoretical analysis and the effectiveness of the proposed method are verified by experimental results.
汪颖 , 罗代军 , 肖先勇 , 等 . 多逆变器并网下的超高次谐振特性分析 [J]. 电力系统自动化 , 2020 , 44 ( 1 ): 192 - 199 .
WANG Ying , LUO Daijun , XIAO Xianyong , et al . Analysis on supraharmonic resonance characteristics with integration of multiple inverters [J]. Automation of Electric Power Systems , 2020 , 44 ( 1 ): 192 - 199 .
WANG X H , QIN K , RUAN X B , et al . A robust grid-voltage feedforward scheme to improve adaptability of grid-connected inverter to weak grid condition [J]. IEEE Transactions on Power Electronics , 2021 , 36 ( 2 ): 2384 - 2395 .
WANG X F , BLAABJERG F . Harmonic stability in power electronic-based power systems: concept, modeling, and analysis [J]. IEEE Transactions on Smart Grid , 2019 , 10 ( 3 ): 2858 - 2870 .
刘桂花 , 曹小娇 , 王卫 . 弱电网下单相光伏并网逆变器锁频环同步方法 [J]. 中国电机工程学报 , 2015 , 35 ( 19 ): 5022 - 5029 .
LIU Guihua , CAO Xiaojiao , WANG Wei . A frequency locked loop grid synchronization method of single-phase grid-connected PV inverter under weak grid [J]. Proceedings of the CSEE , 2015 , 35 ( 19 ): 5022 - 5029 .
鲁裕婷 , 都洪基 , 朱鑫要 . 经VSC-HVDC系统并网的风电场反馈线性化滑模控制 [J]. 电力工程技术 , 2019 , 38 ( 5 ): 91 - 97 .
LU Yuting , DU Hongji , ZHU Xinyao . Feedback linearization sliding mode control of wind farm connected with VSC-HVDC system [J]. Electric Power Engineering Technology , 2019 , 38 ( 5 ): 91 - 97 .
于彦雪 , 马慧敏 , 陈晓光 , 等 . 弱电网下基于准静态模型的混合控制微电网逆变器同步稳定性研究 [J]. 电工技术学报 , 2022 , 37 ( 1 ): 152 - 164 .
YU Yanxue , MA Huimin , CHEN Xiaoguang , et al . Synchronous stability research of inverters in hybrid microgrid based on the quasi-static models under weak grid [J]. Transactions of China Electrotechnical Society , 2022 , 37 ( 1 ): 152 - 164 .
时帅 , 安鹏 , 符杨 , 等 . 含风电场的多端柔性直流输电系统小信号建模方法 [J]. 电力系统自动化 , 2020 , 44 ( 10 ): 92 - 102 .
SHI Shuai , AN Peng , FU Yang , et al . Small signal modeling method for multi-terminal flexible DC transmission system with wind farms [J]. Automation of Electric Power Systems , 2020 , 44 ( 10 ): 92 - 102 .
杨苓 , 陈燕东 , 周乐明 , 等 . 弱电网下锁相环对三相LCL型并网逆变器小扰动建模影响及稳定性分析 [J]. 中国电机工程学报 , 2018 , 38 ( 13 ): 3792 - 3804 .
YANG Ling , CHEN Yandong , ZHOU Leming , et al . Effect of phase locked loop on the small-signal perturbation modeling and stability analysis for three-phase LCL-type grid-connected inverter in weak grid [J]. Proceedings of the CSEE , 2018 , 38 ( 13 ): 3792 - 3804 .
吴恒 , 阮新波 , 杨东升 . 弱电网条件下锁相环对LCL型并网逆变器稳定性的影响研究及锁相环参数设计 [J]. 中国电机工程学报 , 2014 , 34 ( 30 ): 5259 - 5268 .
WU Heng , RUAN Xinbo , YANG Dongsheng . Research on the stability caused by phase-locked loop for LCL-type grid-connected inverter in weak grid condition [J]. Proceedings of the CSEE , 2014 , 34 ( 30 ): 5259 - 5268 .
ZHU D H , ZHOU S Y , ZOU X D , et al . Improved design of PLL controller for LCL-type grid-connected converter in weak grid [J]. IEEE Transactions on Power Electronics , 2020 , 35 ( 5 ): 4715 - 4727 .
李明 , 张兴 , 郭梓暄 , 等 . 弱电网下基于D分割法的逆变器PI参数设计及稳定域分析 [J]. 电力系统自动化 , 2020 , 44 ( 15 ): 139 - 147 .
LI Ming , ZHANG Xing , GUO Zixuan , et al . Proportional-integral parameter design for inverter based on D-partition method and its stability region analysis in weak grid [J]. Automation of Electric Power Systems , 2020 , 44 ( 15 ): 139 - 147 .
高家元 , 肖凡 , 姜飞 , 等 . 弱电网下具有新型PLL结构的并网逆变器阻抗相位重塑控制 [J]. 中国电机工程学报 , 2020 , 40 ( 20 ): 6682 - 6694 .
GAO Jiayuan , XIAO Fan , JIANG Fei , et al . Grid-connected inverter impedance phase reshaping control with novel PLL structure in weak grid [J]. Proceedings of the CSEE , 2020 , 40 ( 20 ): 6682 - 6694 .
曾君 , 岑德海 , 陈润 , 等 . 针对直流偏移和谐波干扰的单相锁相环 [J]. 电工技术学报 , 2021 , 36 ( 16 ): 3504 - 3515 .
ZENG Jun , CEN Dehai , CHEN Run , et al . Single-phase phase-locked loop for DC offset and harmonic interference [J]. Transactions of China Electrotechnical Society , 2021 , 36 ( 16 ): 3504 - 3515 .
LIN X F , YU J R , YU R X , et al . Improving small-signal stability of grid-connected inverter under weak grid by decoupling phase-lock loop and grid impedance [J]. IEEE Transactions on Industrial Electronics , 2022 , 69 ( 7 ): 7040 - 7053 .
杨东升 , 阮新波 , 吴恒 . 提高LCL型并网逆变器对弱电网适应能力的虚拟阻抗方法 [J]. 中国电机工程学报 , 2014 , 34 ( 15 ): 2327 - 2335 .
YANG Dongsheng , RUAN Xinbo , WU Heng . A virtual impedance method to improve the performance of LCL-type grid-connected inverters under weak grid conditions [J]. Proceedings of the CSEE , 2014 , 34 ( 15 ): 2327 - 2335 .
涂春鸣 , 高家元 , 赵晋斌 , 等 . 弱电网下具有定稳定裕度的并网逆变器阻抗重塑分析与设计 [J]. 电工技术学报 , 2020 , 35 ( 6 ): 1327 - 1335 .
TU Chunming , GAO Jiayuan , ZHAO Jinbin , et al . Analysis and design of grid-connected inverter impedance remodeling with fixed stability margin in weak grid [J]. Transactions of China Electrotechnical Society , 2020 , 35 ( 6 ): 1327 - 1335 .
ZHU D H , ZHOU S Y , ZOU X D , et al . Small-signal disturbance compensation control for LCL-type grid-connected converter in weak grid [J]. IEEE Transactions on Industry Applications , 2020 , 56 ( 3 ): 2852 - 2861 .
张学广 , 付志超 , 陈文佳 , 等 . 弱电网下考虑锁相环影响的并网逆变器改进控制方法 [J]. 电力系统自动化 , 2018 , 42 ( 7 ): 139 - 145 .
ZHANG Xueguang , FU Zhichao , CHEN Wenjia , et al . An improved control method for grid-connected inverters considering impact of phase-locked loop under weak grid condition [J]. Automation of Electric Power Systems , 2018 , 42 ( 7 ): 139 - 145 .
TU C M , GAO J Y , XIAO F , et al . Stability analysis of the grid-connected inverter considering the asymmetric positive-feedback loops introduced by the PLL in weak grids [J]. IEEE Transactions on Industrial Electronics , 2022 , 69 ( 6 ): 5793 - 5802 .
CHEN X , ZHANG Y , WANG S S , et al . Impedance-phased dynamic control method for grid-connected inverters in a weak grid [J]. IEEE Transactions on Power Electronics , 2017 , 32 ( 1 ): 274 - 283 .
JIA Y Q , ZHAO J Q , FU X W . Direct grid current control of LCL-filtered grid-connected inverter mitigating grid voltage disturbance [J]. IEEE Transactions on Power Electronics , 2014 , 29 ( 3 ): 1532 - 1541 .
ZHOU S Y , ZOU X D , ZHU D H , et al . An improved design of current controller for LCL-type grid-connected converter to reduce negative effect of PLL in weak grid [J]. IEEE Journal of Emerging and Selected Topics in Power Electronics , 2018 , 6 ( 2 ): 648 - 663 .
谢志为 , 陈燕东 , 伍文华 , 等 . 弱电网下多逆变器并网系统的全局高频振荡抑制方法 [J]. 电工技术学报 , 2020 , 35 ( 4 ): 885 - 895 .
XIE Zhiwei , CHEN Yandong , WU Wenhua , et al . A global high-frequency oscillation suppression method for multi-inverter grid-connected system in weak grid [J]. Transactions of China Electrotechnical Society , 2020 , 35 ( 4 ): 885 - 895 .
SUN J . Impedance-based stability criterion for grid-connected inverters [J]. IEEE Transactions on Power Electronics , 2011 , 26 ( 11 ): 3075 - 3078 .
XIN Z , LOH P C , WANG X F , et al . Highly accurate derivatives for LCL-filtered grid converter with capacitor voltage active damping [J]. IEEE Transactions on Power Electronics , 2016 , 31 ( 5 ): 3612 - 3625 .
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