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首页> 外文期刊>Electric power systems research >Investigation of the behavior of a three phase grid-connected photovoltaic system to control active and reactive power
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Investigation of the behavior of a three phase grid-connected photovoltaic system to control active and reactive power

机译：研究三相并网光伏系统控制有功和无功功率的行为

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In this paper, a photovoltaic (PV) system, with maximum power point tracking (MPPT), connected to a three phase grid is presented. The connection of photovoltaic system on the grid takes place in one stage using voltage source inverter (VS1). For a better utilization of the photovoltaic system, the control strategy applied is based on p-q theory. According to this strategy during sunlight the system sends active power to the grid and at the same time compensates the reactive power of the load. In case there is no sunlight (during the night for instance), the inverter only compensates the reactive power of the load. In this paper the use of p-q theory to supply the grid with active power and compensate the reactive power of the load is investigated. The advantage of this control strategy is that the photovoltaic system is operated the whole day. Furthermore, the p-q theory uses simple algebraic calculations without demanding the use of PLL to synchronize the inverter with the grid.
机译：在本文中，提出了具有最大功率点跟踪（MPPT）的光伏（PV）系统，该系统连接到三相电网。光伏系统在电网上的连接使用电压源逆变器（VS1）在一级中进行。为了更好地利用光伏系统，所应用的控制策略基于p-q理论。根据该策略，系统在日光照射期间将有功功率发送到电网，并同时补偿负载的无功功率。如果没有阳光（例如在夜间），则逆变器仅补偿负载的无功功率。本文研究了使用p-q理论为电网提供有功功率并补偿负载的无功功率的方法。这种控制策略的优点是光伏系统可以全天运行。此外，p-q理论使用简单的代数计算，而无需使用PLL来使逆变器与电网同步。

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