分数阶相位补偿在无电容电流传感器并网逆变器中的应用
发布时间：2018-07-20 17:24
【摘要】：利用电容电流进行有源阻尼时需要增加电流传感器,不但增加系统的硬件成本,也增加了系统的复杂性和故障率。文中提出利用电网电压和入网电流估算出电容电流,再利用估算电流进行有源阻尼。由于数字控制器估算出电容电流和原来连续系统的电容电流存在延迟,若直接用估算电流进行阻尼策略,不但影响控制器的阻尼效果还会影响系统稳定性。为了获得满意的阻尼效果,在估算的电流基础上进行分数插值相位补偿。通过仿真和实验对该方法进行验证,结果表明用补偿后的估算电流进行阻尼可以实现良好的阻尼效果。
[Abstract]:It is necessary to increase the current sensor when using capacitive current for active damping. It not only increases the hardware cost of the system, but also increases the complexity and failure rate of the system. In this paper, the capacitor current is estimated by the use of the grid voltage and the net current, and the active impedance is used to estimate the current. The digital controller estimates the capacitance current and the original. The capacitance current of the continuous system has a delay. If the damping strategy is used directly with the estimated current, the damping effect of the controller will not only affect the stability of the system. In order to obtain the satisfactory damping effect, the fractional interpolation phase compensation is carried out on the basis of the estimated current. The result table is verified by simulation and experiment. The damped effect can be achieved by damping the estimated current after compensation.
【作者单位】： 南京航空航天大学自动化学院;南京工程学院工业中心;
【基金】：国家自然科学基金资助项目(61473145) 中央高校基本科研业务费专项资金 江苏省普通高校研究生科研创新计划资助项目(KYLX15_0274) 江苏省“青蓝工程” 江苏省“六大人才高峰”高层次人才项目(XNY-030)~~
【分类号】：TM464
[Abstract]:It is necessary to increase the current sensor when using capacitive current for active damping. It not only increases the hardware cost of the system, but also increases the complexity and failure rate of the system. In this paper, the capacitor current is estimated by the use of the grid voltage and the net current, and the active impedance is used to estimate the current. The digital controller estimates the capacitance current and the original. The capacitance current of the continuous system has a delay. If the damping strategy is used directly with the estimated current, the damping effect of the controller will not only affect the stability of the system. In order to obtain the satisfactory damping effect, the fractional interpolation phase compensation is carried out on the basis of the estimated current. The result table is verified by simulation and experiment. The damped effect can be achieved by damping the estimated current after compensation.
【作者单位】： 南京航空航天大学自动化学院;南京工程学院工业中心;
【基金】：国家自然科学基金资助项目(61473145) 中央高校基本科研业务费专项资金 江苏省普通高校研究生科研创新计划资助项目(KYLX15_0274) 江苏省“青蓝工程” 江苏省“六大人才高峰”高层次人才项目(XNY-030)~~
【分类号】：TM464
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