Control Method for Ultra-Low Frequency Oscillation and Frequency Control Performance in Hydro–Wind Power Sending System

IF 2.6 3区工程技术 Q2 COMPUTER SCIENCE, INFORMATION SYSTEMS

Electronics Pub Date : 2024-09-17 DOI:10.3390/electronics13183691

Renjie Wu, Qin Jiang, Baohong Li, Tianqi Liu, Xueyang Zeng

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引用次数: 0

Abstract

In a hydropower-dominated power grid, the primary frequency regulation (PFR) capability of hydropower units is typically compromised to suppress ultra-low frequency oscillations (ULFOs). However, as renewable wind power is further integrated, a practicable solution to damp ULFOs has emerged, which is to adjust the frequency control parameters of wind turbine (WT) units. Driven by the goals of overall damping enhancement and ULFO suppression, this paper first establishes an extended unified frequency model (EUFM) of a hydro–wind power sending system. Based on EUFM, the damping torque of the hydro–wind power sending system is derived, and the specific impact of WT control parameters on ULFOs and PFR characteristics is investigated. Then, a novel optimization objective function considering damping in the ultra-low frequency band and PFR is formulated and solved using an intelligence algorithm. By optimizing the parameters of the WT to suppress ULFOs, the PFR capability of hydropower units can be released. Finally, simulation results verify that the optimized WT parameters can simultaneously address the ULFO problem and guarantee PFR performance, thereby enhancing the frequency dynamic stability of the sending system.

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水力风力发电送出系统中的超低频振荡控制方法和频率控制性能

在以水电为主的电网中，水电机组的一次频率调节（PFR）能力通常会受到影响，以抑制超低频振荡（ULFO）。然而，随着可再生风力发电的进一步整合，出现了一种可行的抑制超低频振荡的解决方案，即调整风力涡轮机（WT）机组的频率控制参数。在整体阻尼增强和 ULFO 抑制目标的驱动下，本文首先建立了水风电送出系统的扩展统一频率模型（EUFM）。在 EUFM 的基础上，得出了水风电送出系统的阻尼力矩，并研究了 WT 控制参数对 ULFO 和 PFR 特性的具体影响。然后，考虑到超低频段阻尼和 PFR，制定了一个新的优化目标函数，并使用智能算法进行求解。通过优化 WT 的参数来抑制 ULFO，从而释放水电机组的 PFR 能力。最后，仿真结果验证了优化后的 WT 参数可同时解决 ULFO 问题并保证 PFR 性能，从而提高送出系统的频率动态稳定性。

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

Electronics Computer Science-Computer Networks and Communications

CiteScore

1.10

自引率

10.30%

发文量

3515

审稿时长

16.71 days

期刊介绍： Electronics (ISSN 2079-9292; CODEN: ELECGJ) is an international, open access journal on the science of electronics and its applications published quarterly online by MDPI.