Static Voltage Stability Prediction Analysis And Prevention And Control Research

This dissertation was working for forming a methodology about the advancing analysis of the steady-state voltage stability of power system and the preventive control measures against it, based on the load power forecast technique.Derived from the concept and character of the voltage collapse boundary surface, the discussion on the principles of the advancing analysis and the preventive control of the steady-state voltage stability of power system in this dissertation is illustrative, scientifical and precise. With this understanding, the advancing analysis method of the steady-state voltage stability integrated the continuation power flow analysis, the system Jacobi matrix eigenvalue structure analysis and the correlative sensitivity analysis, provided the comprehensive and veracious informations about the steady-state voltage stability of power system under the future operating state, these informations -included the margin of stability, the weak buses, the crucial branch and the crucial generator.Forming the strategy of control against the voltage instability would relays on the principles of the preventive control and the informations obtained from the advancing analysis program. So that, these measures against occurs of the voltage instability had more objective and more effective effect. Meanwhile, in this dissertation the measure of urgent control of power system against occurs of the voltage instability was presented.Finally, through the thorough analysis of a simulation example about the steady-state voltage stability of power system, the availability and the effectiveness of the discussed methods in this dissertation about the advancing analysis and preventive control of steady-state voltage stability of power system was approved, some significant conclusions was derived from the simulation example.