飞轮电池对风光互补发电系统电压波动的改善研究

在风光互补发电系统独立运行时，由于风速和光照强度的随机变化，风光发电单元的输出功率也会随之变化。负载功率也具有可变性，使得系统功率难以保持平衡，从而引起系统电压波动，影响电能质量。针对这一问题，该文将飞轮电池并联在系统的交流母线上，根据风光发电单元的输出功率和负载消耗功率的差值，采用双环控制策略控制飞轮电池的输出功率，实现系统功率平衡，达到抑制电压波动和改善电能质量的目的。最后对风光输出功率大于负载功率和风光输出功率小于负载功率这两种功率不平衡的情况进行了仿真分析，结果表明飞轮电池可以快速平衡系统的瞬时功率，稳定电压，满足电能质量的要求。

Study of the improvement of voltage fluctuations affected by flywheel battery in the wind and solar power generation

When the wind and solar power generation system independently run , the output power of the wind and light power generation units will change owing to the random variation of wind speed and light.So the power of the wind and solar power generation system is difficult to ensure real -time bal-ance, which can cause voltage fluctuation and influence the power quality .In this situation, this paper use the flywheel storage parallel connection the bus of the system .According to the difference of the power units output power and load consumption power and combined with the double loop control strategy to control flywheel battery output power , which can realize the power balance , suppress voltage fluctuation and improve power quality purpose .At last, the simulation analysis the two kinds of power imbalance sit-uation that the output power of the wind and light is greater than the load power and the output power of the wind and light is less than the load power .The results show that the flywheel battery can quickly bal-ance the instantaneous power of the system , stabilize the voltage and meet the requirements of power quality .