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首页> 外文会议>2015 IEEE IAS Joint Industrial and Commercial Power Systems/ Petroleum and Chemical Industry Conference >Improved limited power tracking of a photovoltaic plant connected across voltage-controlled DC bus
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Improved limited power tracking of a photovoltaic plant connected across voltage-controlled DC bus

机译：改进了跨压控直流母线连接的光伏电站的有限功率跟踪

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The objective of this paper is to improve the performance of limited power point tracking (LPPT) of photovoltaic plants. The limited power point tracking refers to controlling the power output of a photovoltaic array at a level below the maximum power point. The limited power point tracking exhibits advantages over maximum power point tracking (MPPT) both in terms of economy and system security. The previously reported LPPT methods, however, exhibit more oscillations at low power levels or require additional mode changing action under power scarcity and may malfunction under the rapidly varying environmental conditions. To avoid those difficulties, two novel LPPT control schemes are proposed. Both the schemes are carefully designed with minimum deviation from the traditional MPPT control so as to ensure easy implementation. Each of the controllers proposed has its own merit. The LPPT control under the proposed schemes can be implemented without the support of any local energy storage. Detailed case studies are performed to verify the effectiveness of proposed LPPT controllers.
机译：本文的目的是提高光伏电站的受限功率点跟踪（LPPT）的性能。有限功率点跟踪是指将光伏阵列的功率输出控制在最大功率点以下的水平。就经济性和系统安全性而言，有限的功率点跟踪与最大功率点跟踪（MPPT）相比具有优势。然而，先前报道的LPPT方法在低功率水平下表现出更多的振荡，或者在功率不足的情况下需要额外的模式转换动作，并且可能在快速变化的环境条件下发生故障。为了避免这些困难，提出了两种新颖的LPPT控制方案。两种方案均经过精心设计，与传统MPPT控制的偏差最小，以确保易于实施。建议的每个控制器都有其自身的优点。可以在没有任何本地能量存储支持的情况下实施所提出的方案下的LPPT控制。进行了详细的案例研究，以验证建议的LPPT控制器的有效性。

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