| 引用本文: | 张晓勇,王 军,李 川,王 英.基于三维空间矢量中 γ分量控制的三相四桥臂逆变器[J].电力自动化设备,2010,(12): |
| ZHANG Xiaoyong,WANG Jun,LI Chuan,WANG Ying.Three-phase four-leg inverter based on γ component control in three-dimensional space vector[J].Electric Power Automation Equipment,2010,(12): |
|
| 摘要: |
| 提出了一种性能优良、设计简单的三相四桥臂控制器及其设计方法，该方法通过对三相输出电压的静止坐标变换，在各种线性与非线性、平衡与不平衡负载的分析比较中，得出了γ分量是影响三相输出电压不平衡的关键因素；通过分析四桥臂逆变器的控制规律和研究第4桥臂的作用，前3个桥臂由二维空间矢量控制，第4桥臂通过γ分量的控制对负载产生的不平衡进行全补偿，使得在三相不平衡负载下，输出的三相电压达到一个平衡状态。仿真结果验证了该方法的可行性；与现有的方法相比，三相电压和电流中谐波含量显著减少。 |
| 关键词: 三相四桥臂逆变器 空间矢量调制 不平衡和非线性负载 脉宽调制 |
| DOI： |
| 分类号: |
| 基金项目:四川省重点学科基金资助项目（SZD0503-09-0);四川省教育厅重点项目基金资助项目（07ZA108,09ZA112) |
|
| Three-phase four-leg inverter based on γ component control in three-dimensional space vector |
|
ZHANG Xiaoyong, WANG Jun, LI Chuan, WANG Ying
|
|
School of Electrical and Information Engineering，Xihua University，Chengdu 610039，China
|
| Abstract: |
| A three-phase four-leg controller with excellent performance and simple design is proposed. The comparison of output voltage vectors among linear，non-linear，balanced and unbalanced loads shows that the γ component is the key influencing factor on the unbalance of three-phase output voltage. According to the control law of four-leg inverter and the function of its fourth leg，the proposed design method is to control three legs by two-dimensional space vector modulation and the fourth leg by γ component，which compensates completely the unbalance caused by unbalanced loads. Simulative results validate the feasibility of the proposed method. Compared with the existing method，the harmonic components of three-phase output currents and voltages are significantly reduced. |
| Key words: three-phase four-leg inverter space-vector modulation unbalanced and nonlinear load PWM |
