文章摘要
张世勇,曾翔君,魏米兰,等.具有无功馈送绕组的多相永磁同步发电机稳态特性[J].电力系统自动化,2019,43(8):117-123. DOI: 10.7500/AEPS20180918001.
ZHANG Shiyong,ZENG Xiangjun,WEI Milan, et al.Steady-state Characteristics of Multi-phase Permanent Magnet Synchronous Generator with Reactive Power Feeding Windings[J].Automation of Electric Power Systems,2019,43(8):117-123. DOI: 10.7500/AEPS20180918001.
具有无功馈送绕组的多相永磁同步发电机稳态特性
Steady-state Characteristics of Multi-phase Permanent Magnet Synchronous Generator with Reactive Power Feeding Windings
DOI:10.7500/AEPS20180918001
关键词: 高压直驱风电机组  多相永磁同步发电机  无功馈送  多相发电机建模
KeyWords: high voltage permanent magnet direct-drive wind turbine  multi-phase permanent magnetic synchronous generator  reactive power compensation  multi-phase generator modeling
上网日期:2019-03-04
基金项目:国家自然科学基金面上项目(51477134)
作者单位E-mail
张世勇 西安交通大学电气工程学院, 陕西省西安市 710049  
曾翔君 西安交通大学电气工程学院, 陕西省西安市 710049 zengxj@mail.xjtu.edu.cn 
魏米兰 西安交通大学电气工程学院, 陕西省西安市 710049  
刘寅迪 西安交通大学电气工程学院, 陕西省西安市 710049  
摘要:
      对于5 MW及以上超大功率近海风电机组,现有中低压技术方案使发电机与变流器均需要承受较大电流,因此风电系统效率低下。文中简述了具有无功馈送绕组的高压永磁多相风力发电机结构。这种新的结构可以利用拓扑简单的单极性变流器串联直接实现高压直流,同时利用无功馈送绕组,向发电机注入无功功率可以实现发电机励磁与转矩的解耦控制。另外,新的技术方案还能在直流母线短路时,对短路电流峰值进行抑制。文中着重分析了该方案中发电机的稳态特性,首先推导了定子多绕组同步发电机的数学模型,然后通过数值计算的方法,利用一个设计好的6.7 MVA风力发电机相关参数对新的技术方案中发电机的稳态特性进行了分析。
Abstract:
      For ultra-high-power offshore wind turbines of 5 MW or above, the current medium and low-voltage technology solutions make generators and converters withstand large currents, which causes the low efficiency of wind power systems. A structure of a high-voltage permanent magnet multi-phase generator with reactive power feed windings is briefly described. This new structure can directly realize high-voltage direct current(HVDC)by using series unipolar converters with simple topology. Besides, the injection of reactive power into the generator with reactive feed windings can realize the decoupling control of the generator excitation and torque. In addition, the new technical solution can also be used to inhibition the peak short-circuit current when the HVDC transmission line is short-circuit. The paper focuses on the steady state characteristics of the generator. Firstly, the mathematical model of the stator multi-winding synchronous generator is deduced, and then the steady-state characteristics of the generator in the new technical scheme are analyzed by numerical calculation method using related parameters of a 6. 7 MVA wind turbine.
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