为了提高高压电网电压质量补偿效果,提出基于模块化多电平换流器（MMC）的动态电压调节器（DVR）系统的无源非线性控制方法。首先,介绍MMC-DVR的框图以及工作原理,根据基尔霍夫电压电流定律,分别构建abc静止与两相dq旋转坐标系下的数学模型;接着提出无源控制方法来解决问题;最终,在Matlab/Simulink软件实验平台上构建MMC-DVR系统,构建仿真验证无源非线性控制的可行性和优越性。与传统PID相比,无源策略能使系统迅速稳定,提高抗扰能力,采取阻尼注入,能快速、有效地对电压降落/升高和谐波进行补偿,并且无源非线性控制器控制规律简单,所需控制器数量少,可避免PI控制参数选择困难及繁复的缺点。
Abstract
MMC-DVR combined with dynamic voltage regulator（DVR） and modular multilevel converter （MMC） can be used to solve the problem of sag/swell compensation for medium and high voltages. Since MMC-DVR is a non-linear system, the compensation effect of linear control methods such as PID commonly used in DVR systems is not satisfactory. To this end, this paper proposes a passive nonlinear control method for the MMC-DVR system, which can be deeply integrated in the wind farm grid-connected system, and can solve the negative problems such as power quality degradation. First, the circuit topology and working principle of MMC-DVR are introduced, and the mathematical model under the static and rotating coordinate system is established. Then, the passive control method is proposed to solve the problem. Finally, the MMC-DVR control system is built on Matlab/Simulink software experimental platform, and the experimental results verify the feasibility and superiority of the passive nonlinear control strategy proposed in this paper.
关键词
风电场 /
动态电压调节器 /
无源控制 /
模块化多电平转换器 /
动态电压
Key words
wind farm /
dynamic voltage restorer （DVR） /
passivity-based control （PBC） /
modular multilevel converter /
dynamic voltage
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] WABAS N, DILSHAD S, KHALID A, et al.Power quality improvement using dynamic voltage restorer[J]. IEEE access, 2020, 8: 164325-164339.
[2] 郭雨桐, 陈新明, 刘鑫, 等. 理论发电量完成率在海上风电场评价中的应用[J]. 太阳能学报, 2021, 42(2): 211-217.
GUO Y T, CHEN X M, LIU X, et al.Application of theoretical completion rate of power output for evaluation of offshore wind farms[J]. Acta energiae solaris sinica, 2021, 42(2): 211-217.
[3] DEBNATH S, QIN J, BAHRANI B, et al.Operation, control, and applications of the modular multilevel converter: a review[J]. IEEE transactions on power electronics, 2015, 30(1): 37-53.
[4] FERNANDES D A, COSTA F F, MARTINS J R S, et al. Sensitive load voltage compensation performed by a suitable control method[J]. IEEE transactions on industry applications, 2017, 53(5): 4877-4885.
[5] MOHAMMAD F K, EBRAHIM B, FREDE B.A comprehensive review of dynamic voltage restorers[J]. International journal of electrical power and energy systems, 2017, 92(1): 136-155.
[6] NAIDU T A, ARYA S R, AHMED A, et al. Comparative performance of dynamic voltage restorer using adaptive control algorithms with optimized error regulator gains[J]. International transactions on electrical energy systems, 2020, 30(10): 117-122 (e12696).
[7] TAYEB A.Power quality improvement and low voltage ride through capability in hybrid wind-PV farms grid-connected using dynamic voltage restorer[J]. IEEE access, 2018, 6(3): 68634-68648.
[8] HUNG V T, SHU H, GIANG L N, et al.Double-loop control structure using proportional resonant and sequence-decoupled resonant controllers in static coordinates for dynamic voltage restorer[J]. Chinese journal of electrical engineering, 2019, 5(3): 10-19.
[9] ABDULAZEEZ S N, ATILLA D, AYDIN C.Design of adaptive controller for regulating the voltage by a dynamic voltage restorer DVR[C]//International Conference on Electrical, Communication, Computer, Power and Control Engineering, Mosul, Iraq, 2019.
[10] 柯顺超, 朱淼, 陈阳, 等. 基于MMC-UPFC无源性滑模变结构控制的电网不平衡治理策略[J]. 高电压技术, 2020, 46(3): 1078-1086.
KE S C, ZHU M, CHEN Y, et al.Treatment strategy of unbalanced grid voltage conditions based on MMC-UPFC passive sliding-mode variable structure control[J]. High voltage engineering, 2020, 46(3): 1078-1086.
[11] TIEN D V, GONO R, LEONOWICZ Z, et al.Advanced control of the dynamic voltage restorer for mitigating voltage sags in power systems[J]. Advances in electrical and electronic engineering, 2018, 16(1): 36-45.
[12] 黄永红, 施慧, 徐俊俊, 等. 改进dq变换的动态电压恢复器检测新方法[J]. 电力系统及其自动化学报, 2016, 28(10): 117-122.
HUANG Y H, CHI H, XU J J, et al.Improved dq transform algorithm for dynamic voltage restorer detection[J]. Proceedings of the CSU-EPSA, 2016, 28(10): 117-122.
[13] 程启明, 王玉娇, 程尹曼, 等. 非理想条件下MMC-SAPF的无源控制策略研究[J]. 中国电机工程学报, 2019, 39(23): 7023-7032, 7115.
CHENG Q M, WANG Y J, CHENG Y M, et al.Research on passive control strategy of MMC-SAPF under non-ideal conditions[J]. Proceedings of the CSEE, 2019, 39(23): 7023-7032, 7115.
基金
国家自然科学基金（61905139）; 上海市电站自动化技术重点实验室资助项目（13DZ2273800）
PDF(1916 KB)
