海上風電匯集站無功裝置配置方案及其性能研究

 

趙繼超，管永高，甄宏寧

（中國能源建設(shè)集團江蘇省電力設(shè)計院有限公司，江蘇 南京 211102）

 

    摘 要：以江蘇如東220 kV蓬樹海上風電匯集站為例，研究了海上風電匯集站無功裝置的配置方案及其性能特點。按照無功平衡原則，分析了海上風電匯集站無功補償容量計算方法及其配置方案。利用電力系統(tǒng)分析軟件PSD-V2009，研究了風電出力變化對電網(wǎng)電壓的影響及系統(tǒng)發(fā)生短路故障時發(fā)生風電場脫網(wǎng)的可能性。仿真結(jié)果表明：在風電出力變化時，采用電容器補償，電網(wǎng)電壓發(fā)生階躍性變化，匯集站低壓母線電壓越上限；采用SVG補償，電網(wǎng)電壓在國標允許值范圍內(nèi)平滑變化。在系統(tǒng)故障時，采用電容器補償存在風電場脫網(wǎng)的可能，而采用SVG補償可有效避免風電廠脫網(wǎng)的現(xiàn)象。

    關(guān)鍵詞：海上風電；風電匯集站；無功補償；電壓質(zhì)量

    中圖分類號：TM614     文獻標識碼：A     文章編號：1007-3175(2018)02-0017-04

 

    Abstract: Taking the 220 kV Pengshu offshore wind power gathering station (OWPGS) in Jiangsu Rudong for example, this paper studied the configuration scheme and performance characteristics of the reactive power compensation device for OWPGS. According to the principle of reactive power balance, analysis was made to the calculation method of reactive power compensation capacity and configuration scheme of OWPGS. The power system analysis software PSD-V2009 was used to research on the influence on the grid voltage when the wind power changes and the possibility of the wind farm tripping in case of the power system fault occurrence. The simulation results show that when the wind power changes, the grid voltage changes by step and the voltage of OWPGS low-voltage bus voltage is over the upper limit if capacitor compensation is adopted, and the grid voltage changes smoothly within the allowable value of the national standard. When the power system fault occurred, it is possible to cause the wind farm tripping if capacitor compensation is adopted and it can effectively avoid the phenomenon of the wind farm tripping if SVG compensation is adopted.

    Key words: offshore wind power; wind power gathering station; reactive power compensation; voltage quality