弱电网集成太阳能光伏分布式发电系统能够满足电流限制下的无功需求

IF 1.6 Q4 ENERGY & FUELS
Subarni Pradhan, Bhim Singh, Bijaya Ketan Panigrahi
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引用次数: 1

摘要

本研究提出一种具有低电压穿越能力的电网互动太阳能光伏(PV)系统。当供电电压下降超过10%时,太阳能光伏系统保持连接状态,继续向负荷和电网提供有功功率。太阳能光伏阵列系统在提供有功电源的同时,为稳定系统提供无功电源。由于有功和无功功率的供应,电网馈电逆变器(GFI)电流有可能超过最大电流限制。可能导致逆变器保护跳闸。因此,采用限流逻辑使逆变器电流保持在安全限度内。不平衡电压负责负序电流在系统中的循环。由于本工作的主要目的是处理向电网供电的正序电流,因此需要分别估计正序和负序电压。为了从不平衡电源电压中估计序列电压,采用了频率自适应高阶复杂滤波器(FAHOCF)。建立了电网交互太阳能光伏阵列的MATLAB模型,并将仿真结果与试验结果进行了验证。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Weak grid integrated solar photovoltaic-based distributed generation system proficient in supplying VAR requirement with current restriction

Weak grid integrated solar photovoltaic-based distributed generation system proficient in supplying VAR requirement with current restriction

This study presents a grid interactive solar photovoltaic (PV) system proficient with low voltage ride through capability. When the supply voltage drops more than 10%, the solar PV system remains connected and continues to supply the active power to the loads as well as to the grid. Along with the active power supply, the solar PV array system supplies the reactive power for stabilising the system. Due to the supply of both the active and reactive powers, there is a chance for a grid fed inverter (GFI) current to exceed the maximum current limit. It may result in the tripping of inverter protection. Therefore, a current limiting logic is incorporated to keep the inverter current within the safe limit. The unbalanced voltages are responsible for circulation of negative sequence currents in the system. As the prime aim of the present work deals with the supply of positive sequence currents to the grid, it is required to estimate the positive and negative sequence voltages separately. Intending the estimation of sequence voltages from unbalanced supply voltages, a frequency adaptive higher order complex filter (FAHOCF) is used. A MATLAB model of grid interactive solar PV array is developed and simulated results are verified with test results.

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来源期刊
IET Energy Systems Integration
IET Energy Systems Integration Engineering-Engineering (miscellaneous)
CiteScore
5.90
自引率
8.30%
发文量
29
审稿时长
11 weeks
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