伪微分反馈控制的电励磁双凸极直流发电系统∗

摘要

PI control algorithm is the most common algorithm in use for traditional generator control units ( GCU) of Wound-Field Doubly Salient Machine ( WFDSM ) brushless DC Generating System. In order to optimize the transient voltage buildup of the system and promote the robustness, a new close-loop voltage regulation strategy Pseudo Derivative Feedback( PDF) was presented. The WFDSM Generating System was introduced firstly, and its transfer functions are established. Also, dynamic performance and anti-interference capability of GCU with PI control and PDF control are analyzed theoretically. Generating system models were built in MATLAB/Simulink based on a four-phase WFDSM, simulations and comparisons were made between two control strategies. The result demonstrates that dynamic performance of generating system was improved, transient voltage buildup process was fast and smooth, and overshooting was restrained clearly with PDF control. It also shows good anti-interference capability in coping with load and speed disturbance and good robustness.%传统电励磁双凸极无刷直流发电系统的调压器大多采用PI控制算法。为优化发电系统的建压过程与增强鲁棒性，引入一种新的闭环调压策略———伪微分反馈( PDF)控制。首先对电励磁双凸极电机( WFDSM)发电系统进行了阐述，并且构建了对应的传递函数，继而对采用PI调压器与PDF调压器的发电系统动态性能与抗扰动性能进行了理论分析。基于一台四相电励磁双凸极发电机，在MATLAB/Simulink中搭建了发电系统模型，对两种控制策略进行了仿真对比。采用PDF控制有助于改善发电系统的动态性能，建压响应过程迅速且平稳，超调得到明显抑制；应对负载与转速扰动的抗扰性能好，具备优良的鲁棒性。