Contribution to control strategies for converter connected to unbalanced grid

2016 7th International Conference on Sciences of Electronics, Technologies of Information and Telecommunications (SETIT) Pub Date : 2017-07-01 DOI:10.1109/DT.2017.8012120

Martin Bejvl, P. Šimek, G. Fandi, Z. Muller, J. Tlustý, V. Valouch

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引用次数: 2

Abstract

The paper deals with developed and experimentally tested effective synchronization and power control techniques for grid-connected converter. A new FLL (Frequency Locked Loop) technique is developed that incorporates advantages of both the cascaded delayed signal cancellation and dual second order generalized integrator schemes. Experimental results are evaluated in terms of quality of the positive voltage sequence, frequency and phase angle identification for the grid voltage disturbed by harmonic, subharmonic, and negative sequence components as well as for amplitude, frequency, and phase angle jumps in the voltage. A novel power control technique for grid-connected converter under unbalanced voltage conditions is referred as well. The current positive and negative sequences during grid voltage sags are controlled to assure a proper exchange of active and reactive powers without substantial power ripples, and especially, without current harmonics.

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对非平衡并网变流器控制策略的贡献

本文介绍了已开发并经过实验验证的并网变流器的有效同步和功率控制技术。提出了一种新的锁频环技术，它结合了级联延迟信号对消和双二阶广义积分器的优点。对电网电压受谐波、次谐波和负序分量干扰时的正电压序列、频率和相角识别质量以及电压的幅值、频率和相角跳变进行了评价。提出了一种新的电压不平衡条件下并网变流器功率控制技术。对电网电压跌落时的电流正负序进行控制，以保证有功和无功的适当交换，而不产生大量的功率波动，特别是不产生电流谐波。

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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来源期刊

2016 7th International Conference on Sciences of Electronics, Technologies of Information and Telecommunications (SETIT)

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