基于比例谐振的永磁直驱风电机组高电压穿越控制策略

doi:10.11985/2018.03.001

摘要/Abstract

摘要：

本文提出一种基于比例谐振的永磁直驱风电机组高电压穿越控制策略。依据电网电压骤升幅度,网侧变流器优先向故障电网输出一定比例的感性无功电流。在直流母线电压超出限值后,超级电容器储存能量以稳定直流母线电压。本文所提策略与传统的PI控制策略相比,能够在静止坐标系下对交流输入信号进行无静差控制。同时,该策略减少了坐标旋转变换,不存在受温度及电路参数影响的耦合项和前馈补偿项,简化了控制算法。仿真结果表明,该控制策略不仅可以保证永磁直驱风电机组在电网高压故障期间不脱网连续运行,又可使该系统为电网电压的恢复提供一定的感性无功。

关键词: 永磁同步发电机, 高电压穿越, 比例谐振

Abstract:

Put forward a HVRT control strategy of direct-driven PMSG based on proportional resonant controller. Based on the extent of grid voltage swell, the grid side converter give priority to output certain inductive reactive current to the fault grid. The super-capacitor stores energy to stabilize the DC bus voltage when the DC voltage exceed the limit. Proportional resonant (PR) controller can control the AC input signal without static difference in stationary reference frame. Compared with the traditional PI control strategy, this strategy reduces the coordinate rotation transform, does not have coupling terms and feed-forward compensation terms which is affected by the temperature and the circuit parameters. The simulation results show that the control strategy can not only ensure the direct-driven PMSG in continuous operation during the fault, but also can make the system provides inductive reactive power for the recovery of the grid voltage.

Key words: Permanent magnet synchronous generation, high voltage ride through, proportional resonant

中图分类号:

TM614

张明锐,尉芬. 基于比例谐振的永磁直驱风电机组高电压穿越控制策略[J]. 电气工程学报, 2018, 13(3): 1-8.

Mingrui Zhang,Fen Wei. The HVRT Control Strategy of Direct-Driven PMSG Based on Proportional-Resonant Controller[J]. Journal of Electrical Engineering, 2018, 13(3): 1-8.

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