摘要
当同步发电机转子停在特定区域时,传统的初始导通方案使得静止变频器输出转矩小,导致同步发电机启动失败。分析了同步发电机静止变频系统原理及输出转矩,提出了一种基于双重分区的静止变频系统初始导通方案,使静止在任何位置的发电机转子受到正向的驱动转矩最大,保证发电机初始正向转动且加速平稳。为解决传统的控制方法不能使直流电流在发生脉冲换相后快速上升并维持稳定的问题,提出了整流电路导通角前馈控制和电流闭环控制策略,并进行了RTDS仿真。仿真结果显示,所提控制策略提高了低速阶段发电机启动的快速性和平稳性,验证了静止变频系统低速阶段控制策略的正确性和有效性。
When the rotor stops in a specific section,the traditional initial conduction scheme makes the output torque of the static frequency converter small,which causes the synchronous generator to fail to start.Firstly,the principle and output torque of the synchronous motor static frequency conversion system are analyzed,and an initial conduction scheme of the static frequency conversion system based on dual partitions is proposed.This makes the generator rotor stop at any position to receive the maximum forward driving torque,ensuring that the generator initially rotates in the forward direction and accelerates smoothly.The traditional control method cannot make the DC current rise quickly and maintain stability after pulse commutation.The conduction angle feed-forward control and current closed-loop control strategies of the rectifier circuit are proposed.It improves the fastness and stability of the generator starting at low speed.Finally,the correctness and effectiveness of the control strategy in the low-speed phase of the static frequency conversion system are verified by simulation.
作者
陈虹
梁超
Chen Hong;Liang Chao(Changzhou Power Supply Company of State Grid Jiangsu Electric Power Co., Ltd.,Jiangsu Changzhou, 213004, China)
出处
《机械设计与制造工程》
2022年第1期122-126,共5页
Machine Design and Manufacturing Engineering
基金
国网江苏省电力有限公司科技项目(J2021091)。
关键词
静止变频器
脉冲换相
双重分区
初始导通方案
控制策略
static frequency converter
pulse commutation
dual partitions
initial conduction scheme
control strategy
