蓄电池储能并网太阳能光伏电站采用高交直流负荷比逆变器避免功率截损

2019 2nd International Conference on Power Energy, Environment and Intelligent Control (PEEIC) Pub Date : 2019-10-01 DOI:10.1109/PEEIC47157.2019.8976581

Shashi Shekhar Giri, Aziz Ahmad, V. Katiyar

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引用次数: 1

摘要

针对并网太阳能光伏电站中高交直流负载比逆变器因截功率而造成的能量损失，采用压控双向DC- DC变换器与锂离子电池接口，通过MATLAB模型仿真解决了这一问题。蓄电池连接在并网太阳能光伏电站的直流链路上。完整的拓扑结构在MATLAB®中建模。该模型使用一个单向dc - dc变换器，带有太阳能光伏接口MPPT(最大功率点跟踪)和电压源逆变器，将太阳能光伏或电池的电力注入电网。如果来自太阳能光伏的功率高于逆变器的容量，则部分光伏功率以压控双向DC-DC变换器的Buck模式转移到蓄电池。这避免了由于逆变器容量的限制而导致的光伏功率剪切和逆变器的能量损失。当太阳能光伏发电小于逆变器容量时，电池产生的电能以Boost模式和Inverter模式通过相同的双向DC-DC变换器排入电网。在MATLAB中对模型进行了仿真，并对结果进行了验证。

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Avoiding Power Clipping Losses by Inverter having High DC-to-AC Loading Ratio in Grid Connected Solar PV Plant Using Battery Energy Storage System

This paper presents a MATLAB model simulation as a solution to capture and avoid energy losses due to power clipping by Inverter having high DC to AC loading ratio in grid connected solar PV plant using voltage controlled bidirectional DC-to-DC converter interfaced with Lithium Ion battery. Battery is connected on DC link of grid connected solar PV plant. Complete topology is modeled in MATLAB®. Model uses a unidirectional DC-to-DC converter with MPPT (Maximum Power Point Tracking) for Solar PV Interface and Voltage Source Inverter to inject power into the grid from Solar PV or Battery. If the power from Solar PV is higher than the capacity of Inverter, some PV power is diverted to the battery in Buck mode of voltage controlled bidirectional DC-DC Converter. This avoids PV power clipping and loss of energy by inverter due to inverter capacity limitation. When Solar PV generation is less than Inverter capacity, power from the battery is discharged into the grid through same bidirectional DC-DC converter in Boost mode and Inverter. Model is simulated in MATLAB and results are validated.

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2019 2nd International Conference on Power Energy, Environment and Intelligent Control (PEEIC)

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