Frequency Support From a DC-Grid Offshore Wind Farm Connected Through an HVDC Link: A Communication-Free Approach

被引：48

作者：

Kou, Peng ^{[1
]}

Liang, Deliang ^{[1
]}

Wu, Zihao ^{[2
]}

Ze, Qiji ^{[1
]}

Gao, Lin ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Sch Elect Engn, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Shaanxi, Peoples R China

[2] Shaanxi Elect Power Res Inst, Xian 710199, Shaanxi, Peoples R China

来源：

IEEE TRANSACTIONS ON ENERGY CONVERSION | 2018年 / 33卷 / 03期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Frequency control; HVDC transmission; offshore wind farm; permanent magnet synchronous generator; INERTIAL RESPONSE; VSC-HVDC; GENERATORS; SYSTEMS; DESIGN; ENERGY; SPEED;

D O I：

10.1109/TEC.2018.2814604

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

DC collection grid and high-voltage direct-current (HVDC) transmission lines provide promising solutions for an offshore wind farm (OWF). However, due to the decoupling effect of the de collection grid and an HVDC link, an HVDC-connected de-grid OWF cannot directly participate in the frequency regulation of the onshore ac grid. To address this issue, this paper presents a communication-free control scheme, which allows an HVDC-connected all-dc OWF to contribute to the onshore ac grid frequency regulation. This scheme consists of making the offshore dc collection grid voltage and onshore frequency deviations proportional. It relies on the HVDC voltage control at the onshore converter, together with the dc collection grid voltage control at the offshore converter. Furthermore, by continuously adjusting the droop of each wind generator in response to its local wind speed, this scheme takes into account the wind speed difference among wind generators, thereby improving the frequency nadir/peak and guaranteeing the wind generator stability. Simulation results verify the effectiveness of the proposed scheme.

引用

页码：1297 / 1310

页数：14

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