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首页> 外文期刊>Electric power systems research >Single-phase control of three-phase fuelcell-battery under unbalanced conditions considering off-grid and grid-tied states
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Single-phase control of three-phase fuelcell-battery under unbalanced conditions considering off-grid and grid-tied states

机译：考虑离网和网格绑定状态的不平衡条件下三相燃料电池的单相控制

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摘要

This paper presents an advanced control strategy for balancing the time-varying and unbalanced loads by using the fuel cell and battery under the grid-tied and off-grid operations. In the grid-tied operation, the fuel cell and the battery are coordinately controlled to balance the three-phase unbalanced active and reactive powers of the loads. In this case, the received three-phase active-reactive powers from the grid become completely balanced by the given strategy. In the off-grid, the diesel generator supplies the active-reactive powers of load and the unbalances are handled by coordinated operation of fuel cell and battery. As well, the voltage of off-grid system is improved by injecting adequate reactive power to the system through the fuel cell, battery and diesel generator. The dynamic stability of the system is evaluated under non-linear disturbances like grid outage and single-phase fault. The time-varying unbalanced active-reactive powers are balanced under both off-grid and grid-tied states by implementing the proposed model. The purpose of the proposed control system is to balance the unbalanced load from point of view of the upstream grid at all time periods. In order to realize such function in the model, the load is modeled by two terms including the balanced and unbalanced parts. The unbalanced share is supplied by the inverters (DC bus) and the balanced term of load is supplied by the grid. The designed system is resilient under the events like grid outage and short circuits. As well, the system properly regulates and controls the load variations and unbalances.
机译：本文通过在网格连接和离网操作下使用燃料电池和电池来介绍平衡时变和不平衡负载的先进控制策略。在网格绑定操作中，燃料电池和电池配合地控制，以平衡负载的三相不平衡的主动和无功功率。在这种情况下，来自网格的接收的三相有源反应功率通过给定的策略完全平衡。在离网格中，柴油发电机提供负载的有源反应力，并且不平衡由燃料电池和电池的协调操作处理。同样，通过燃料电池，电池和柴油发电机向系统注入足够的无功功率来提高偏离电网系统的电压。在非线性干扰下评估系统的动态稳定性，如网格中断和单相故障。通过实施提议的模型，在异物网格和网格绑定状态下平衡时变不平衡有源反应电力。所提出的控制系统的目的是在所有时间段的上游网格的角度下平衡不平衡的负载。为了实现模型中的这种功能，负载由包括平衡和不平衡部件的两个术语建模。不平衡份额由逆变器（DC总线）提供，并且通过电网提供负载的平衡项。设计的系统在不同的事件中是弹性的，如网格中断和短路。同样，系统妥善调节和控制负载变化和不平衡。

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