Coordinated control of on-load tap changer and D-STATCOM for voltage regulation of radial distribution systems with DG units
Coordinated control of on-load tap changer and D-STATCOM for voltage regulation of radial distribution systems with DG units
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有载分接开关和 D-STATCOM 的协调控制，用于带 DG 装置的径向配电系统的电压调节
DOI：
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发表时间：
2013
期刊：
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通讯作者：
F. Vallée
中科院分区：
文献类型：
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作者：
B. Bakhshideh Zad;J. Lobry;F. Vallée
本文提出了一种在存在分布式发电 (DG) 单元的情况下对径向中压 (MV) 配电网进行电压调节的新技术。该技术由变压器有载分接开关（OLTC）和分布式静态同步补偿器（D-STATCOM）无功补偿的协调动作组成。利用 OLTC 的动作来管理系统电压是中压系统电压调节的最常见方法之一。然而，有载分接开关不能用于长径向配电馈线的电压调节，因为它改变了馈线的发送点电压。在本研究中，使用 OLTC 对径向配电馈线进行电压调节的问题将通过在 DG 连接母线处使用无功功率补偿来解决。仿真结果表明，所提出的控制方法能够将系统电压维持在允许的范围内。由于采用协调控制方法，每种电压控制方法的缺点都被另一种方法所弥补，从而使系统损耗最小化。
This paper presents a new technique for voltage regulation of a radial medium voltage (MV) distribution grid in presence of distributed generation (DG) units. The proposed technique consists of the coordinated actions of on-load tap changer (OLTC) of transformer and reactive power compensation by distribution static synchronous compensator (D-STATCOM). Managing the system voltage using the action of OLTC is one of the most common ways for voltage regulation of MV systems. However, OLTC cannot be used for voltage regulation of long radial distribution feeders as it changes the sending point voltage of the feeder. In this study, the problem of using OLTC for the voltage regulation of a radial distribution feeder will be solved by using reactive power compensation at the DG connected bus. Simulation results reveal that the proposed control method is capable of maintaining the system voltages within the permitted range. Thanks to the coordinated control method, the drawbacks of each voltage control method are covered by the other one that results in minimization of the system losses as well.