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Sag compensation in smart grid with distributed generation

机译：分布式发电的智能电网中的凹陷补偿

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Power quality (PQ) is the most discussed topics in the power industry. It is nothing but the interaction between the electrical power and electrical equipment. If the electrical equipment can operate correctly as well as reliably without damaged or stressed, that means the electrical power is of good quality. There are different types of issues in power quality like Transients, Interruptions, Sag or under-voltage, Swell or Overvoltage, Waveform distortion, Voltage fluctuations, Frequency variations and Harmonics which are more sensitive due to large use of power electronic equipment as well as nonlinear loads. These all issues are almost present in industry, commercial and domestic applications. Smart grid has been emerged as promising technology for enabling bi-directional communication between the power company and its users to facilitate intelligent and robust emerging power grid systems [1][2]. One important challenge for smart grid designers is demand side management, which can lead to avoid peak hours as well as to reduce the cost for the consumers and power quality issues. In this paper we will use Fuel cell (FC) as well as wind generator as DG sources. Boost converters are used for boosting the output of the FC and then by using inverter it converts DC to AC. In the wind generation, Doubly Fed Induction Generator (DFIG) is used as generator which gives large power output, mostly it is used for wind generation [2][3]. The scope of this paper covers the issues in Power Quality for Distributed Generation of Smart grid with storage devices. MATLAB software is used for simulation. Here power quality issues are discussed and focus on sag, which is become common issue. FC and wind generators are used as Microgrid which of 0.5 MW and 1.5 MW rating respectively. If sag occurs in present system, it will be cover by using injection transformer. To recover sag, battery may be used as an inverter input. Control signal will give to inverter and by using control signal the sag will cover by injecting voltage.
机译：电能质量（PQ）是电力行业中讨论最多的主题。就是电力与电气设备之间的相互作用。如果电气设备能够正确，可靠地运行而不会损坏或承受压力，则表明电源质量良好。电能质量存在不同类型的问题，例如瞬态，中断，凹陷或欠压，骤升或过电压，波形失真，电压波动，频率变化和谐波，由于电力电子设备的大量使用和非线性，这些问题更加敏感负载。所有这些问题几乎都存在于工业，商业和家庭应用中。智能电网已成为一种有前途的技术，可实现电力公司及其用户之间的双向通信，以促进智能，强大的新兴电网系统的发展[1] [2]。智能电网设计人员面临的一项重要挑战是需求侧管理，这可以避免高峰时段，并降低用电成本和电能质量问题。在本文中，我们将使用燃料电池（FC）和风力发电机作为DG源。升压转换器用于对FC的输出进行升压，然后通过使用逆变器将DC转换为AC。在风力发电中，双馈感应发电机（DFIG）被用作提供大功率输出的发电机，大多数用于风力发电[2] [3]。本文的范围涵盖具有存储设备的分布式智能电网的电能质量中的问题。 MATLAB软件用于仿真。在此讨论功率质量问题并将其重点放在下垂上，这已成为常见问题。 FC和风力发电机分别用作额定功率为0.5 MW和1.5 MW的微电网。如果在当前系统中发生下垂，则可以使用注入变压器将其覆盖。为了恢复下垂，可以将电池用作逆变器输入。控制信号将提供给逆变器，并通过使用控制信号通过注入电压来覆盖下垂。

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