智能变压器与低频变压器在电力系统中输电特性的比较

Junru Chen, Rongwu Zhu, T. O’Donnell, Marco Liserre
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引用次数: 11

摘要

智能变压器是一种基于电力电子的变压器,提供电压调节和直流连接。作为变压器,它的基本功能仍然是输送电力。智能变压器具有先进的控制,可以通过吸收/注入无功功率来支持中压电网电压,同时主动调节低压电网电压。由于中压侧和低压侧的电压都是可控的,因此智能变压器的电力输送是灵活的。通过对智能变压器的最大输出功率和功率电压曲线的分析,研究了智能变压器的输电特性,并与传统的低频变压器在电力系统中采用一次侧STACTOM或二次侧有载分接开关进行了比较。仿真结果表明,与传统的带负载分接开关的低频变压器相比,智能变压器提高了系统的电压稳定性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Smart Transformer and Low Frequency Transformer Comparison on Power Delivery Characteristics in the Power System
Smart transformer is a power electronics-based transformer, offering voltage regulation and DC connectivity. As a transformer, its basic function is still power delivery. Smart transformer with advanced controls can support MV gird voltage by absorbing/injecting reactive power while actively regulate the LV grid voltage. Due to the controllable voltage in both MV and LV side, the power delivery of smart transformer is flexible. This paper focuses on the power delivery characteristic of smart transformer and compares with the conventional low frequency transformer with the help of STACTOM at its primary side or on load tap changer at its secondary side, in the power system by means of maximum deliverable power and power-voltage curve analysis. The Simulink results validate that the smart transformer improves system voltage stability compared to the traditional low frequency transformer with load tap changer.
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