基于超级电容器储能的交直交变频驱动系统制动能量综合回收利用方法研究

Research on the Integrated Braking Energy Recovery Strategy Based on Supercapacitor Energy Storage for AC-DC-AC Variable-frequency Drive

交直交变频驱动系统已经在工农业生产中得到了广泛的应用,但是大部分都采用能耗制动,造成了能量的巨大浪费。采用超级电容器储能的制动能量回收利用系统,能够在电机制动时回收制动能量,并在电机启动或加速时释放出去,从而实现能量的节约利用。然而,该方案存在储能容量配置较大、价格昂贵等缺点,制约了其推广应用。该文以提高制动能量回收利用系统性价比为目标,提出制动能量综合回收利用方法以及超级电容器储能单元储能量和充放电变流器功率优化设计方法,设计交直交变频器、储能单元、制动电阻之间无需通讯线的协调控制策略,并通过在石油钻机上的示例分析和仿真验证所提方法的正确性和有效性。

The AC-DC-AC variable-frequency drive system has been widely used in industrial and agricultural production. Most of them adopt the energy consumption brake, which leads to large energy waste. The supercapacitor based energy saving system can absorb the braking energy when motor decelerates, which achieves energy saving. However, this system has shortcomings, such as the large energy storage capacity configuration and it is expensive, which restricts its application. In this paper, an integrated braking energy recovery method and an optimal configuration method were proposed with the goal to improve the performance price ratio of the overall braking energy recovery system, and the coordinated control strategy without communication lines among the variable-frequency drive, the energy storage unit and the braking resistor was designed. Design examples on drilling rig and simulation results verify the correctness and validity of the proposed method.