提出一种无主开关管的新型开关磁阻发电机（SRG）功率变换器拓扑,在高速运行和连续导通模式（CCM）下分析其励磁和发电两阶段工作过程,并与通过开关角控制的经典不对称半桥功率变换器进行对比,发现两者的励磁和发电工作过程基本相同。进一步通过仿真和实验,获得新型功率变换器在高速CCM时的相电压、相电流等结果与理论分析相吻合,并获得转速、励磁电压、发电电压、功率四者的约束关系,从而优化输出功率时可采用调节励磁电压和发电电压的方式,相比于不对称半桥功率变换器,两者的发电输出能力相当。最后,以变速风电应用为例,给出控制策略,无需转子位置检测和风速检测,基速以上无桨距角调节,证实了所提新型功率变换器及其控制策略在高速CCM运行时的有效性。
Abstract
A switch less power converter topology for SRG is proposed in this paper. Under high-speed operation and continuous conduction mode （CCM）, the working process of excitation stage and generation stage of the new power converter is analyzed. At the same time, compared with the traditional asymmetrical half-bridge power converter based on the switching angle control, the same results of excitation and power generation processes are obtained. According to the simulation and experimental results, the phase voltage and phase current of the new power converter at high speed CCM are consistent with the theoretical analysis. The constraints of speed, excitation voltage, generation voltage and power are obtained, and then the output power can be optimized by adjusting the excitation voltage and generation voltage. Compared with the asymmetric half-bridge power converter controlled by switching angle, the new power converter has the same generation capacity. Finally, taking the application of variable speed wind power as an example, the control strategy is given, without rotor position detection and wind speed detection, and without pitch angle adjustment above the base speed. The simulation results show the effectiveness of the proposed power converter and its control strategy in high-speed CCM operation.
关键词
风力发电 /
开关磁阻发电机 /
功率变换器 /
无开关管 /
连续导通模式 /
控制策略
Key words
wind power /
switched reluctance generator /
power converter /
no switch tube /
continuous conduction mode /
control strategy
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] ZHAO X D, LI B B, ZHANG B X, et al.A high-power step-up DC/DC converter dedicated to DC offshore wind farms[J]. IEEE transactions on power electronics, 2022, 37(1): 65-69.
[2] LAKSHMANAN P, SUN R J, LIANG J.Electrical collection systems for offshore wind farms: a review[J]. CSEE journal of power and energy systems, 2021, 7(5): 1078-1092.
[3] 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.
[4] LU M Z, JHOU P H, LIAW C M.Wind switched-reluctance generator based microgrid with integrated plug-In energy support mechanism[J]. IEEE transactions on power electronics, 2021, 36(5): 5496-5511.
[5] CHEN H, XU D G, DENG X.Control for power converter of small-scale switched reluctance wind power generator[J]. IEEE transactions on industrial electronics, 2021, 68(4): 3148-3158.
[6] 冬雷, 刘依依, 凌露露, 等. 一种开关磁阻风力发电机功率变换器拓扑设计[J]. 太阳能学报, 2019, 40(2): 438-446.
DONG L, LIU Y Y, LING L L, et al.Design of converter topology for switched reluctance wind power generator[J]. Acta energiae solaris sinica, 2019, 40(2): 438-446.
[7] 彭寒梅, 易灵芝, 徐天昊, 等. 开关磁阻发电机他励模式下的简易功率变换器控制[J]. 太阳能学报, 2012, 33(8): 1334-1341.
PENG H M, YI L Z, XU T H, et al.Simple power converter control of independent-excited switched reluctance generators[J]. Acta energiae solaris sinica, 2012, 33(8): 1334-1341.
[8] CHEN H, NIE R, GU J, et al.Efficiency optimization strategy for switched reluctance generator system with position sensorless control[J]. IEEE/ASME transactions on mechatronics, 2021, 26(1): 469-479.
[9] CHEN H, GUAN G R, HAN G Q, et al.Fault diagnosis and tolerant control strategy for position sensors of switched reluctance starter/generator systems[J]. IEEE transactions on transportation electrification, 2020, 6(4): 1508-1518.
[10] GE L F, XU H H, GUO Z C, et al.An optimization-based initial position estimation method for switched reluctance machines[J]. IEEE transactions on power electronics, 2021, 36(11): 13285-13292.
[11] XIAO D X, YE J, FANG G L, et al.Improved feature-position-based sensorless control scheme for SRM drives based on nonlinear state observer at medium and high speeds[J]. IEEE transactions on power electronics, 2021, 36(5): 5711-5723.
[12] 孙冠群, 张海丽, 蔡慧. 基于功率变换器与励磁电压扰动法的SRG风电MPPT控制[J]. 电力系统自动化, 2017, 41(2): 101-107.
SUN G Q, ZHANG H L, CAI H.MPPT control of SRG for wind power based on power converter and excitation voltage disturbance method[J]. Automation of electric power systems, 2017, 41(2): 101-107.
[13] DOU Y Y, CHEN D.Optimal control strategy for excitation parameters of SRGs[J]. Journal of power electronics, 2020, 20(6): 1496-1503.
[14] 孙冠群, 王小东, 张黎锁, 等. 开关磁阻风力发电机变励磁电压MPPT控制[J]. 电机与控制学报, 2019, 23(3): 113-119.
SUN G Q, WANG X D, ZHANG L S, et al.MPPT control of excitation voltage regulation for switched reluctance wind generator[J]. Electric machines and control, 2019, 23(3): 113-119.
[15] REKIK M, BESBES M, MARCHAND C, et al.High-speed-range enhancement of switched reluctance motor with continuous mode for automotive applications[J]. European transactions on electrical power, 2008, 18(7): 674-693.
[16] HANNOUN H, HILAIRET M, MARCHAND C.Design of an SRM speed control strategy for a wide range of operating speeds[J]. IEEE transactions on industrial electronics, 2010, 57(9): 2911-2921.
[17] HANNOUN H, HILAIRET M, MARCHAND C.Experimental validation of a switched reluctance machine operating in continuous-conduction mode[J]. IEEE transactions on vehicular technology, 2011, 60(4): 1453-1460.
[18] CALASAN M, VUJICIC V.Characteristics of switched reluctance motor operating in continuous and discontinuous conduction mode[J]. Serbian journal of electrical engineering, 2013, 10(1): 47-57.
[19] ĆALASAN M P, VUJIČIĆ V P. A robust continuous conduction mode control strategy of switched reluctance generator for wind power plant applications[J]. Electrical engineering, 2017, 99(3): 943-958.
基金
浙江省基础公益研究计划（LY20E070006; LY22E070008）
PDF(2284 KB)
