| 引用本文: | 马临超,蒋炜华,薛宝星.NPC型三电平永磁同步风力发电并网逆变器模型预测控制满足低电压穿越要求研究[J].电力系统保护与控制,2017,45(16):151-156.[点击复制] |
| MA Linchao,JIANG Weihua,XUE Baoxing.Model predictive current control of grid-connected neutral-point-clampedpermanent magnet synchronous wind power inverters to meet low-voltage ride-through requirements[J].Power System Protection and Control,2017,45(16):151-156[点击复制] |
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| 摘要: |
| 在风力发电中低电压穿越要求为:当电网电压降落的时候，风力发电机不脱网且能够稳定电网电压和频率。风力发电机需要较高的功率和电压等级。因此，多电平中中点箝位型三电平逆变器非常适合这种设备。和其它控制方法相比，模型预测控制具有动态响应快和跟踪性能好的优点，但是工作频率低。为了能够满足低电压穿越的要求，提出一种模型预测控制方法实现NPC三电平逆变器的风力转换。所提模型预测控制也能够实现NPC逆变器中点平衡控制，通过选择冗余小矢量实现。仿真和实验验证了所提算法正确性。 |
| 关键词: 低电压穿越 NPC型三电平逆变器 模型预测控制 中点平衡控制 |
| DOI：10.7667/PSPC161619 |
| 投稿时间：2016-09-27修订日期：2016-11-22 |
| 基金项目:河南省教育厅科学研究重点项目(13A470216) |
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| Model predictive current control of grid-connected neutral-point-clampedpermanent magnet synchronous wind power inverters to meet low-voltage ride-through requirements |
| MA Linchao,JIANG Weihua,XUE Baoxing |
| (Henan Institute of Technology, Xinxiang 453003, China;State Grid Henan Electric Power Company, Zhengzhou 450007, China) |
| Abstract: |
| The low-voltage ride through (LVRT) requirement demands the wind power to remain connected to the grid in the case of grid voltage dips. And the proposed control method can keep grid voltage and frequency stable. Wind power needs to increase power and voltage ratings. Therefore, multilevel inverters, such as neutral-point-clamped (NPC) inverters, are suited for this application. Model predictive control presents fast dynamic response and good current reference tracking than other control methods, but working at lower switching frequencies. In this paper, a model predictive control is proposed to the grid-side three-level NPC inverter as part of a wind energy conversion system in order to fulfill the LVRT requirements. DC-link neutral-point (NP) balance is also achieved by means of the model predictive control algorithm, which chooses the redundant small vectors of the NPC inverter. Simulation and experimental results confirm the validity of the proposed control method. |
| Key words: low-voltage ride through (LVRT) three-level NPC inverter model predictive power control neutral-point potential (NP) control |
