Online safety and stability trend analysis method for large power network

Abstract

The invention provides an online safety and stability trend analysis method for a large power network. The method comprises the following steps: I, online safety and stability analysis is carried out according to the current operating mode of the power network, and the safety and stability estimation result of the power network at the current operating network is generated; II, the estimated future operating mode of the power network is adjusted according to the current operating mode, the ultra short-term load forecast, an ultra short-term new energy source forecast, real-time power generation plan and scheduling operation of the power network; III, the online safety and stability analysis is carried out aiming at the future operating mode of the power network, and the safety and stability estimation result of the power network at the future operating state is generated; IV, the safety and stability estimation result at the current operating state and the safety and stability estimation result at the future operating state of the power network are determined; V, the safety and stability trend level of the power network is determined; VI, the evolution trend of the power network in the future is estimated according to the result of the level. The method provided by the invention can carry out safety analysis on the power network in advance, stability problems and development trend of a power system can be pre-estimated, so that the early warning of accidents at future states is realized, and corresponding early warning and decision information are provided.

Description

technical field [0001] The invention relates to a method in the technical field of online simulation and calculation analysis of a large power grid, in particular to an online security and stability trend analysis method suitable for a large power grid. Background technique [0002] Since the "8.14" blackout in the United States and Canada in 2003, with the increase in the complexity of power grid operation control and the frequent occurrence of unconventional power grid accidents, online dynamic security assessment technology has played an increasingly important role in power grid operation, and has It has been applied in major power grids at home and abroad. Based on the actual operation mode of the power grid, the online dynamic security assessment technology conducts a comprehensive evaluation of its security status, helps dispatchers grasp the operation of the power grid in a timely manner and gives suggestions for auxiliary measures. [0003] With the continuous and r...

AI Technical Summary

Problems solved by technology

[0004] The existing online dynamic security assessment technology is to periodically (every 15 minutes) evaluate the security and stability of the current operation mode of the power grid, and each simulation analysis time is 5-10 minutes, and the simulation analysis conclusion lags behind the changes in the operation mode of the power grid , especially when the operating state of the power grid changes rapidly, the lagging simulation analysis conclusions can no longer meet the business needs of guiding dispatching operators to analyze and make decisions under the background of growing power grid scale and complexity

Images