Smart Grid Power Quality Improvement Using Modified UPQC

2019 Devices for Integrated Circuit (DevIC) Pub Date : 2019-03-01 DOI:10.1109/DEVIC.2019.8783704

Sayan Paramanik, K. Sarker, D. Chatterjee, S. Goswami

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引用次数: 17

Abstract

The Smart Grid (SG) system typically deals with different issues involving security and Power Quality (PQ) improvement. With frequent usage of power electronic devices and nonlinear load, harmonics are inserted into the system. The well-known Flexible AC Transmission System (FACTS) devices like Unified Power Quality Conditioners (UPQC) are usually employed to resolve the issues related to voltage sag, swell, flicker, PQ, and neutral current reduction of distribution systems. An UPQC itself inserts harmonics into the system that affects the system stability for sensitive loads. This paper describes biogeography based optimization (BBO) with harmonics elimination techniques for modified UPQC connected with SG. Lower order harmonics are eliminated by proper selection of switching angles and at the same time the higher order harmonics are suppressed by injecting same order harmonics with equal magnitude but opposite in phase from the other converter. The excitation of Modified UPQC converters are obtained from PV (Photo-Voltaic) panel. The firing angles of series-shunt converter are obtained in real-time from the already stored angles in the microcontroller memory.

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基于改进UPQC的智能电网电能质量改进

智能电网(SG)系统通常处理涉及安全和电能质量(PQ)改进的各种问题。随着电力电子设备的频繁使用和非线性负荷的增加，系统中会产生谐波。众所周知的柔性交流输电系统(FACTS)设备，如统一电能质量调节器(UPQC)，通常用于解决配电系统的电压暂降、膨胀、闪变、PQ和中性电流减小等问题。UPQC本身将谐波插入系统中，影响敏感负载的系统稳定性。本文介绍了基于生物地理的优化(BBO)和谐波消除技术，用于与SG连接的改进UPQC。通过适当选择开关角消除了低阶谐波，同时从另一变换器注入等量反相的同阶谐波抑制了高阶谐波。改进型UPQC变流器的励磁来自光伏板。串并联变换器的发射角由单片机存储器中已经存储的角度实时得到。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2019 Devices for Integrated Circuit (DevIC)

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