Considering the lack of the current method of PI regulator, which requires repeated trial and error and is not easy to be obtained, a tuning method of PI parameters of visualization is given in this paper. The proposed method is achieved by plotting the stability boundary locus directly based on system model in the (Kp,Ki )-plane and determining the stable region also called stable set. Then, by using the required frequency-domain performance index, the parameters that meet the frequency-domain performance index can be obtained in the stable set and meanwhile drawn it out in the region. Finally, on the base of the frequency-domain parameters optimization, the best set of PI tuning parameters satisfying the time-domain performance indexes which including the steady-state performance index ,the dynamic performance indexes and the rise time can be found. The simulation of CIGRE HVDC Benchmark model shows the validity of the method approached.%由于现行PI调节器设计方法需反复试凑且不易达到要求,提出了一种PI控制器参数的可视化调整方法.该方法直接由系统模型在(Kp,Ki)平面上绘制稳定边界曲线,判断并确定其稳定区域即稳定集；然后,根据系统具体要求频域性能指标,在稳定集中选取满足频域性能指标的控制参数集,并在稳定集中绘制出来；最后,在频域参数优化的基础上,进行满足稳态性能指标和动态性能指标、超调量和上升时间等时域性能的参数寻优,从而找到最佳的PI参数集.基准模型的仿真验证了该方法的正确性.
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