VSC-HVDC恒容阻尼控制器设计

发布时间：2018-04-22 00:28

本文选题：柔性直流输电 + 恒容阻尼控制　；参考：《高电压技术》2017年04期

【摘要】：针对含柔性直流输电的区域互联系统区间低频振荡问题,基于暂态能量原理提出一种维持换流器传输容量恒定的柔性直流恒容阻尼控制思想,同时利用换流站有功及无功,弥补了柔性直流输电系统有功调制量受限的缺点。首先,根据系统阻尼消耗的暂态能量推导出有功和无功调制与系统阻尼间的相互关系;然后根据有功、无功的控制规律提出恒容阻尼控制设想并设计出恒容控制器参数;最后,与传统极点配置的小信号阻尼控制器进行对比仿真分析。仿真结果表明恒容阻尼控制器能有效抑制区域间低频振荡,具有较强的鲁棒性,能在保持换流站输送容量恒定的同时,充分利用换流站有功和无功调制能力,有效解决常规阻尼控制方式下有功调制量受限问题。
[Abstract]:Based on the transient energy principle, a flexible DC constant capacity damping control idea is proposed for the low frequency oscillation of a regional interconnected system with flexible direct current transmission. At the same time, the active and reactive power of the converter station is utilized. It makes up for the limitation of active power modulation in flexible DC transmission system. Firstly, according to the transient energy consumption of system damping, the relationship between active and reactive power modulation and system damping is deduced. Then, according to the control law of active and reactive power, the constant capacity damping control assumption is proposed and the parameters of constant capacity controller are designed. Compared with the traditional pole placement small signal damping controller, the simulation analysis is carried out. The simulation results show that the constant volume damping controller can effectively suppress the low frequency oscillation between regions and has strong robustness. It can make full use of the active and reactive power modulation capability of the converter station while maintaining the constant transmission capacity of the converter station. The problem of active power modulation is effectively solved in the conventional damping control mode.
【作者单位】：四川大学电气信息学院;
【基金】：国家电网公司科技项目(SGRIZLKJ[2015]457)~~
【分类号】：TM712

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