On-line Calculation Analysis And Research Of Power System

With the inter-connection of large-scale power grid and development of electric power market in China, the operation of power system become more flexible. Fast and accurately method for stability control is required. As for daily circulating or stable control strategy, conservative result under the off-line imitating calculation, will come to the lower efficiency of the power grid circulating, and it can not exalt the power grid's transmitting capacity. Because of the power load growth, extension of power grid scale and requests to the power supply's credibility, preventing from the breakage of the system transient stability , which is still one of the extremely important missions in the current power system. Because of adopting current power grid's condition and data, also analyzed result of calculation matching current power grid's practice, on-line imitating calculation can avoid the conservative result under off-line calculation, and make working personnel release from the heavy calculating work. So it has the significant meaning to daily controlling for the power grid.Firstly, this research paper analyses stability of electric power system, and concentrates on the analysis of electric power system's transient stability. Combining with the safe control analysis of electric power system, this research paper expounds the emergency control's development and increasingly important position in the real-time controlling of the electric power system. This research paper also introduced that in the development of the computer and the network, the power grid which is making use of the EMS real time information, can carry on stable computing and carry out controlling of new stable control system in engineering processing circumstance, and made a brief introduction of the whole system frame. According to the system load flow, this paper introduced how to carry out current calculation, and method of stable strategy circulation process and stability decision by using PSASP, in a word with this system being gradually perfect and practical, it can provide the reliable protection for the power grid, and can improve the power grid's stable gradation.This thesis also concentrates on safe stability of power grid net work, which is treated as core of this paper. With the help of Power System Analysis Software Package which was developed by Chinese electric power science research institute. Safe stability which is based on the EMS information, take the simulation after accident, adopted emergency control measure and change the control-decision of each area installing, In order to adopt the change of the power grid, and to provide technique supporting for the power grid net work and engineering, make sure the safety of the power grid.