| 摘要: |
| 设计了一种三相不平衡电子负载模拟装置。该装置采用AC／DC／AC双PWM变流器为主电路结构，通过有功功率和无功功率的解耦控制来模拟三相不平衡电子负载特性，同时能实现能量的双向流动。提出以三相电路瞬时无功功率理论为基础的单相电路谐波和无功电流实时检测方法来推导指令电流，使指令电流不受电网电压初始相位的影响，从而提高装置的抗干扰性。通过Matlab仿真来验证该装置设计方案的可行性和合理性，仿真波形说明该电子负载模拟装置能够消除电网扰动所带来的干扰，具有较强的抗干扰作用。 |
| 关键词: 不平衡电子负载 双PWM变流器 指令电流 能量回馈 |
| DOI： |
| 分类号: |
| 基金项目:甘肃省自然科学基金（096RJZA092）；甘肃省高等学校基本科研业务费专项资金资助项目 |
|
| Three-phase anti-interference unbalanced electronic load simulator |
|
TIAN Mingxing, LIU Fang
|
|
School of Automation & Electrical Engineering，Lanzhou Jiaotong University，Lanzhou 730070，China
|
| Abstract: |
| A three-phase unbalanced load electronic simulator is designed，which applies an AC／DC／AC bidirectional PWM inverter as its main circuit and the decoupled active and reactive power controls to simulate the three-phase unbalanced load and realize the bidirectional power flow. Based on the three-phase instantaneous reactive power theory，the command current is deduced by the real-time detection of single -phase current harmonics and reactive current to eliminate the impact of grid voltage initial phase for improving its anti-interference performance. Simulation with Matlab demonstrates the feasibility and rationality of its design and the simulative waveforms show that，with excellent anti-interference performance，the simulator eliminates the disturbances from power grid. |
| Key words: unbalanced electronic load dual-directional PWM inverter command current energy feedback |
