Coordinated power control without AC voltage sensing and active power filtering using interlinking converter with reduced interlinking power flow in a droop controlled islanded hybrid AC‐DC microgrid,International Transactions on Electrical Energy Systems

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Coordinated power control without AC voltage sensing and active power filtering using interlinking converter with reduced interlinking power flow in a droop controlled islanded hybrid AC‐DC microgrid
International Transactions on Electrical Energy Systems ( IF 1.9 ) Pub Date : 2021-01-12 , DOI: 10.1002/2050-7038.12786
R. V. S. E. Shravan ₁ , C. Vyjayanthi ₁

Affiliation

An interlinking converter (IC) in a hybrid AC‐DC microgrid (HMG) is the power transfer medium between the AC and DC subgrids. This article proposes a modified control strategy of IC for carrying out the power transfer between the subgrids without sensing the AC voltages. This control strategy directly extracts the AC voltages from the gate signals used for controlling the IC. The omission of AC voltage sensing process upgrades the reliability of the system and also minimizes the size and cost of the system considerably. The paper also studies the operation of IC as an active power filter (APF) under non‐linear loading conditions, with the objective of reducing the interlinking power flow. APF using IC while carrying out power transfer between the subgrids generate high power losses. This issue is addressed by controlling the IC using the power request method, thereby ensuring a reduced power flow through the IC. In this article, the results obtained from the simulation of the HMG in MATLAB/Simulink are presented to verify effectiveness of the proposed control strategy. The results of real‐time simulations performed using OPAL‐RT (OP4500) real‐time simulator test bed are also presented to validate the potency of the proposed control strategy.

中文翻译：

在具有下垂控制的孤岛式AC-DC混合微电网的情况下，使用互连转换器以降低互连功率的方式进行协调式功率控制，而无需进行交流电压感测和有源功率滤波

AC-DC混合微电网（HMG）中的互连转换器（IC）是AC和DC子电网之间的电力传输介质。本文提出了一种改进的IC控制策略，用于在不感应AC电压的情况下在子电网之间进行功率传输。该控制策略直接从用于控制IC的栅极信号中提取AC电压。省略交流电压感测过程可以提高系统的可靠性，还可以最大程度地减小系统的尺寸和成本。本文还研究了在非线性负载条件下IC作为有源功率滤波器（APF）的工作原理，目的是减少互连功率流。使用IC的APF在子电网之间进行功率传输时会产生高功率损耗。通过使用功率请求方法控制IC可以解决此问题，从而确保减少流经IC的功率。在本文中，将介绍在MATLAB / Simulink中对HMG进行仿真所获得的结果，以验证所提出的控制策略的有效性。还介绍了使用OPAL-RT（OP4500）实时仿真器测试台执行的实时仿真结果，以验证所提出的控制策略的有效性。

更新日期：2021-03-02

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