第38卷第21期
史力系保护員控
Vol 38 No. 2
2010年11月1日
Power System Protection and Control
Now.1,2010
基于无源性理论的
双馈风力发电机双PWM变换器协调控制
张先勇,舒杰
(中国科学院广州能源研究所,广东广州510640)
摘要:交流励磁双馈风力发电系统在实现最大风能跟踪过程中,转子侧功率变化频繁,使得双PWM变换器中的直流母线电压
波动剧烈。基于无源性理论提出了一种双PM变換器的协调控制方策,对双PWM变換器的转子侧和电网侧分别进行直接功率
控制,使其具有相同的动态响应特性;在电容电压反馈控制的基础上引入功率前愦控制,使电容两侧功率流动动态平衡,
减少电容电压的波动。建立了双PWM变换器励磁的双馈风力发电系统的仿真模型,仿真结果表明该协调控制策略极大地改善
了直流母线电压的动态特性,实现了最大风能跟踪,并且降低了变換器中电容容量要求,提高了风电系统的电能质量
关健词:风力发电;双愦电机;无源性;双PWM变換器;协调控制
Passivity-based co-operation control of dual PWM converters for doubly-fed wind power generator
ZHANG Xian-yong, SHU Jie
Guangzhou Institute of Energy conversion, the Chinese Academy of Sciences, Guangzhou 510640, China)
Abstract: During the maximum wind power capture of the doubly-fed wind power generator excited by the dual PWM conveter, the
power of the ro or windings varies frquently and fiercely, which leads to the volta e fluctuation ofthe DC bus. Direct power control of
the rotor-side and the grid-side converters individually are suggested. A new passivity-based co-operation control strategy is put forward
for the dual PWM converter, so the subsystem can has the same dyamic characteristics. Power forward controf is introduced to the
voltage feedback control of the capacitor, so the power flows of the two sides of the capacitor keep balanced, which alleviates the
voltage variation of the capaci or. The simulation model is established for the doubly-fed wind power generation system excited by the
dual PWM conveter. Simulation el s show that the con state an not only realize the ma mum wind power capture, but as
improve the dynamic voltage characteristics of the DC bus. The controller designed reduces the capacity requirement of the capacitor
nd enhances the electric quality of the syste
This work is supported by National Natural Science Foundation of Guangdong Province(No. 8451007006000934 and
81510070060000.
Key words: wind power generation; doubly-fed generator; passivity; dual PWM converter; co-operation control
中图分类号:TM315文献标识码:A
文章编号:1674-3411(2010)21-0184-05
0引
定的母线电压是提高系统控制性能的有效途径,由
于风能的不确定性要求不断调整电机转速以实现最
交流励磁双馈风力发电机组作为变速恒频风力大风能捕获,因此转差功率的变化频繁而且剧烈,
发电的主流机型在国内得到了广泛应用,实际运行对直流母线扰动很大,增加了网侧变换器的控制难
经验表明控制系统仍然为主要薄弱环节之一。图1度1
所示的双PWM变换器励磁的双馈风力发电系统
中,转子側变换器用于
双馈电机的励磁控制,实现
最大风能跽踪;网侧变换器用于从电网获取转子侧
所需的转差功率,或者将转差功率馈入到电网。稳
风力机
转子侧变换器
网变换器
图1双PWM励磁的双馈风力发电机组
基金项目:广东省自然科学基金(845100700600034)
Fig 1 Doubly-fed induction wind power generator excited by
(815100700600005
dua] PWM converter
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