船舶电网基波电压同步信号实时检测技术

Real-Time Synchronizing Signal Detection Technique of Ship Grid Fundamental Wave Voltage

针对电力推进船舶电网电压不平衡情况下基波正序电压幅值、频率和相位信息的精确检测,提出了一种基于PR谐振调节器的T/4延时计算法的软件锁相技术。通过T/4延时计算法消除了电网电压不平衡时负序分量的影响,用PR调节器代替PI调节器提高了检测的速度和精度。仿真结果表明,在船舶电网电压不平衡的条件下,该新型软件锁相技术能够准确快速地检测电网的基波正序电压幅值、频率和相位,有效地验证了该方法的正确性。

Accodding to the precise and real-time detection of fundamental wave voltage positive sequence voltage amplitude,frequency and phase information under ship grid voltage unbalanced for an electric propulsion ship,a new SPLL technique based on proportional-resonant( PR) controller with T/4 delay calculation method was proposed. The T/ 4 delay calculation method can eliminate the influence of negative sequence component under ship grid voltage unbalance,and PR regulator instead of PI regulator to improve the speed and accuracy of detection. The simulation result shows that the new SPLL can quickly and accurately detect the fundamental wave positive sequence voltage,frequency and phase information of the ship grid voltage,thereby effectively to verify the correctness of the method.