Coordinated Control of Three Single-Phase BESS Inverters Using Local Measurements to Mitigate Voltage Unbalance
Coordinated Control of Three Single-Phase BESS Inverters Using Local Measurements to Mitigate Voltage Unbalance
复制标题
使用本地测量来协调控制三个单相 BESS 逆变器以减轻电压不平衡
DOI：
10.1109/tec.2022.3202137
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发表时间：
2022
影响因子：
4.9
通讯作者：
Mexis I
中科院分区：
文献类型：
--
作者：
Mexis I
本文提出了一种单相蓄电池逆变器的控制算法，用于在光伏电池板和电动汽车渗透率较高的配电网中提供电压不平衡补偿。对一个典型的配电网进行了研究，以量化单相负荷和发电机组对电压不平衡程度的影响，并识别导致最大电压不平衡的条件。然后通过调节三个单相蓄电池储能单元与电网之间的有功和无功交换来进行电压不平衡补偿。该控制策略由上层控制系统和蓄电池储能系统组成，上层控制系统通过发送有功和无功参考信号来协调三个单元，电池储能系统(BESS)控制系统调节每个单相逆变器与电网之间的有功和无功功率交换。仿真结果表明，该方法的有效性取决于储能单元的安装位置。该方法对平衡潮流和减小变压器零序电流也有积极的影响。最后，进行了半实物实验，对控制算法进行了实时验证。
This article proposes a control algorithm for single-phase battery inverters to provide voltage unbalance compensation in distribution networks with high penetration of photovoltaic panels and electric vehicles. A typical distribution system is studied to quantify the impact of single-phase loads and generating units on voltage unbalance levels, and identify the conditions that lead to the highest voltage unbalance. Voltage unbalance compensation is then performed by regulating active and reactive power exchange between three single-phase battery energy storage units and the power grid. The proposed control strategy consists of an upper level control system to coordinate the three units by sending active and reactive power reference signals, and a Battery Energy Storage System (BESS) control system to regulate active and reactive power exchange between each single-phase inverter and the grid. Simulation results show that the effectiveness of this approach depends on the location where the energy storage units are installed. The positive impact of the proposed methodology on balancing the power flow and reducing the transformer zero-sequence current is also demonstrated. Finally, Hardware-In-The-Loop (HIL) experiments are carried out to provide validation of the control algorithm in real-time.