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孤岛模式下潮流能发电系统协调控制策略

, PP. 551-560

Keywords: 孤岛模式,潮流能发电,协调控制,主从控制,能量管理

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Abstract:

为提高孤岛模式下潮流能发电系统稳定性,深入研究了潮流特性及逆变器控制策略,对孤岛电网内部各子系统进行了建模分析。孤岛电网采用基于V/f控制为主、PQ控制为从的运行方案,提出V/f逆变器直流母线并联适量储能装置的方案,既增加了系统可靠性与经济性,又解决了重要负荷供电问题。为保证V/f逆变器直流母线电压稳定,提出基于直流母线电压变化系数的控制算法。考虑孤岛模式下负荷与微源出力变化对电网稳定性的影响,引入孤岛电网调节裕度,提出适用于潮流能发电调节裕度最优的控制算法。通过PSCAD软件进行仿真分析,结果表明提出的控制算法能够保持孤岛电网稳定。实验验证了所提控制算法的可靠性和有效性。

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