两级三相并网逆变器直流链电压间接控制策略

YUAN Jianhua; GAO Houlei; GAO Feng; WANG Ruwei; JI Xiaoqing; WANG Banghui

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两级三相并网逆变器直流链电压间接控制策略

更新时间：2025-08-13

- 两级三相并网逆变器直流链电压间接控制策略
- Automation of Electric Power Systems Vol. 34, Issue 23, Pages: 82-86(2010)
- 作者机构：
  
  1. 山东大学电气工程学院,山东省,济南市,250061
  2. 烟台供电公司,山东省,烟台市,264001
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2010
- 稿件说明：
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YUAN Jianhua, GAO Houlei, GAO Feng, et al. [J]. Automation of electric power systems, 2010, 34(23): 82-86.
DOI：

YUAN Jianhua, GAO Houlei, GAO Feng, et al. [J]. Automation of electric power systems, 2010, 34(23): 82-86. DOI：

摘要

提出一种可应用于新能源并网发电的两级三相并网逆变器直流链电压间接控制方法，即无直流链电压互感器的控制方法。该方法区别于传统的基于电压互感器直接测量并跟踪控制的方式，利用直流链电压与正弦脉宽调制（SPWM）信号幅值的对应关系，引入直流链电压间接调节参数，从而影响并间接控制直流链电压，不需要对直流链电压值进行直接检测。这种控制方法在不降低逆变器整体性能的基础上，取消了直流链电压互感器，减少了电磁干扰对采样系统的影响，不仅提高了系统的可靠性，而且降低了成本。基于MATLAB下的系统模型仿真证明了所述控制方法的正确性与可行性。

Abstract

A novel indirect DC-link voltage control scheme is presented for two-stage three-phase grid-connected inverter， which is applicable to connecting renewable energy generation system to the power grid. Different from the traditional direct DC-link voltage control scheme， the method proposed is realized by calculating and controlling the amplitude of sinusoidal modulation signals. This eliminates the DC-link voltage sensor and makes the whole system more reliable and less expensive. After analyzing the operational principle under balanced operation condition， the indirect DC-link voltage control method has then been successfully extended to implement in three-phase voltage unbalance condition. MATLAB simulations prove the validity of the control method proposed.

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