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Enhanced Single Phase Locked Loop for Grid-Connected Converter in Distribution Network

机译：配电网中并网变流器的增强型单相锁相环

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摘要

Distributed generations are becoming increasingly attractive to consumers and such as in the future, the governing grid-connection standards are demanding due to the large number of alternative distributed energy resource (DER) and the multifunction converter, such as supplying reactive power, improving power quality. Now the grid-connected performances are much greater emphasized on the robust synchronous technique, which requires the phase, the amplitude, and the frequency of the utility grid for the operation of the grid connected power conditioning equipments. In such application, a more accurate and faster Phase Locked Loop is necessary, but the existing PLLs are lack of better performances. This paper presents an improved single PLL for the grid-connected converter based on instantaneous DQ theory and nonlinear control in distribution network; the advantage of PLL includes high accuracy, independent frequency, and faster response. The validity of PLL is verified by simulation and experiment.
机译：分布式发电对消费者越来越有吸引力，例如在未来，由于大量的替代分布式能源（DER）和多功能转换器（例如，提供无功功率，改善电能质量），对电网管理标准提出了更高的要求。 。现在，并网性能已经在稳健的同步技术上得到了更大的强调，该技术需要并网，幅度和频率来运行并网功率调节设备。在这种应用中，需要更准确，更快速的锁相环，但是现有的PLL缺乏更好的性能。本文提出了一种基于瞬时DQ理论和配电网非线性控制的改进型并网变换器单锁相环。 PLL的优势包括高精度，独立的频率和更快的响应。通过仿真和实验验证了PLL的有效性。

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