基于积分分离PID控制的励磁软起励仿真  

Simulation of excitation soft starting based on integral separation PID control

作　　者：罗腾[1] 史文奎[1] 燕锋[1] 崔勇超 眭鑫[1] LUO Teng;SHI Wen-kui;YAN Feng;CUI Yong-chao;SUI Xin(Xiluodu Hydropower Plant,China Yangtze Power Co.,Ltd.,Zhaotong,657300,China)

机构地区：[1]中国长江电力股份有限公司溪洛渡水力发电厂,云南昭通657300

出　　处：《水电站机电技术》2021年第11期44-48,109,共6页Mechanical & Electrical Technique of Hydropower Station

摘　　要：发电机励磁系统一般采用PID控制方式,传统PID控制方式在偏差量有大扰动时,积分环节会产生很大的超调从而导致电压超出发电机允许的极限,而积分分离PID对偏差量大扰动后的动态调节效果改善显著。首先分析空载发电机各绕组间的电磁耦合方程,并建立相应的数学模型,然后利用Matlab-Simulink中的积分1/s模块搭建空载发电机模型,模拟发电机空载下的软起励、阶跃等过程,并与实际发电机实测波形进行对比,较好地模拟出了实际发电机的运行状态。PID control method is generally adopted in the excitation system of generator. When there is a large disturbance in the deviation of traditional PID control method, the integral link will produce a large overshoot, leading to the voltage exceeding the allowable limit of the generator. The integral separation PID can significantly improve the dynamic adjustment effect after the large disturbance in the deviation. Firstly, the electromagnetic coupling equation between windings of no-load generator is analyzed, and corresponding mathematical models are established. Then, no-load generator model is built by using the integral 1/s module in MATLAB-Simulink to simulate the excitation soft starting and step processes of no-load generator, and compared with measured waveforms of real generators, which proves that the operation state of the actual generator is simulated well.

关 键 词：励磁 积分分离PID 软起励 

分 类 号：TV734[水利工程—水利水电工程]