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首页> 外文期刊>International Journal of Smart Grid and Green Communications >A sliding mode observer design for single phase photovoltaic grid integration
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A sliding mode observer design for single phase photovoltaic grid integration

机译：用于单相光伏电网集成的滑模观测器设计

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摘要

In this paper, solar array current is estimated and observed with a sliding mode observer instead of having a sensor, the observer is based on sliding-mode control and is constructed from the dynamic equations of the considered system vis. a single phase grid connected photovoltaic system that has a photovoltaic module and a single-phase H-bridge inverter. The solar array current is observed by the known values or measured values of the array voltage and inductor current. The current estimation is governed by the sliding mode observer gain, with decrease in the value of the gain, chattering problems become reduce. Observer gain has been varied from 100% of designed value to 6.25% of its value. A compromise has been made between estimation accuracy and chattering, to get an effective result at 12.5% of the designed value of observer gain. The estimated value almost follows the original current and hence, is used to track the MPP rapidly. Methodology of grid integration of distributed photovoltaic systems is explored and simulated using MATLAB/Simulink. The simulation results prove the effectiveness of the proposed method for efficient grid integration.
机译：在本文中，太阳能电池阵列的电流是通过滑模观测器而不是传感器来估计和观测的，该观测器基于滑模控制，并由所考虑系统的动力学方程构成。具有光伏模块和单相H桥逆变器的单相并网光伏系统。通过阵列电压和电感器电流的已知值或测量值来观察太阳能阵列电流。当前估计值由滑模观测器增益控制，随着增益值的减小，颤动问题变小。观察者的增益从设计值的100％变为其值的6.25％。在估计精度和抖动之间做出了折衷，以便在观察者增益的设计值的12.5％处获得有效的结果。估计值几乎跟随原始电流，因此可用于快速跟踪MPP。使用MATLAB / Simulink探索和仿真了分布式光伏系统的网格集成方法。仿真结果证明了所提方法对高效网格集成的有效性。

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