Voltage-power Relationship for DRU-HVDC Connected OWF System

IF 1 4区工程技术 Q4 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Compel-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering Pub Date : 2023-06-25 DOI:10.1109/COMPEL52896.2023.10221145

Chengqi Zhang, Dongsheng Yang, Han Mu

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引用次数: 0

Abstract

In order to pair control variables following the system properties for designing grid-forming wind turbines in the diode rectifier unit(DRU)- high-voltage direct current(HVDC) connected offshore wind farm (OWF) with controlled hydrogen electrolysis and small grid connection onshore, both steady-state and small-signal relationship between voltage at the OWF and power transmitted to DRU-HVDC have to be clearly understood. However, apart from uncontrolled nature of DRU, interface constituting by passive devices between OWF and the offshore platform impact the voltage-power relationships as well. To including physical properties of DRU to the AC circuit analysis, chain rule is implemented to bridge the voltage at point of common connection (PCC) and the OWF, reflecting the voltage divider role of MVAC cables, DRU filters and reactive power compensation devices.The research work reveals large gain between the voltage magnitude of OWF and power transmitted to HVDC link, while adjusting frequency hardly affect the power, which are different from voltage-power relationship in conventional power systems. The rigorous analytical results are verified by PSCAD/EMT simulation.

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药-高压直流连接OWF系统的电压-功率关系

为了在二极管整流机组(DRU)-高压直流(HVDC)连接的海上风电场(OWF)中设计并网风力发电机时根据系统特性配对控制变量，控制氢气电解和陆上小电网连接，必须清楚地了解OWF电压与传输到DRU-HVDC的功率之间的稳态和小信号关系。然而，除了DRU的不可控特性外，OWF与海上平台之间由无源器件构成的接口也会影响电压-功率关系。为了将DRU的物理特性纳入交流电路分析，采用链式法则桥接PCC和OWF电压，体现了MVAC电缆、DRU滤波器和无功补偿装置的分压器作用。研究表明，与传统电力系统的电压-功率关系不同，OWF的电压幅值与输往HVDC的功率之间存在较大的增益，而调整频率对功率几乎没有影响。通过PSCAD/EMT仿真验证了分析结果的正确性。

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

Compel-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 工程技术-工程：电子与电气

CiteScore

1.60

自引率

0.00%

发文量

124

审稿时长

4.2 months

期刊介绍： COMPEL exists for the discussion and dissemination of computational and analytical methods in electrical and electronic engineering. The main emphasis of papers should be on methods and new techniques, or the application of existing techniques in a novel way. Whilst papers with immediate application to particular engineering problems are welcome, so too are papers that form a basis for further development in the area of study. A double-blind review process ensures the content''s validity and relevance.