Dynamic reactive power reserve coordination optimization method based on transient partition and predictive control

Abstract

The invention particularly relates to a dynamic reactive power reserve coordinated optimization method based on transient partition and predictive control, and the method comprises the steps: building a corresponding transient voltage stability comprehensive evaluation index, namely TVSI, according to the characteristics of transient bus voltage; the fault severity is evaluated based on TVSI, and then fault partitioning is carried out on the power grid; based on the result of the fault partition, solving a reactive power optimization problem through scanning of an anticipated fault set, sensitivity analysis of TVSI and reactive power reserve optimization; and optimizing a solving result of the reactive power optimization problem, replacing reactive power output through a low-speed dynamic reactive power compensation device, generating a control optimization model for dynamic reactive power standby optimization, and realizing coordinated control of corresponding equipment. According to the dynamic reactive power reserve coordination optimization method, the damage degree of faults or disturbance can be reduced at a high speed and low control cost, safe and stable operation of the whole system is guaranteed, and the stability of operation control of a power system can be improved.

Description

technical field [0001] The invention relates to the technical field of power system operation control, in particular to a dynamic reactive power reserve coordination optimization method based on transient partition and predictive control. Background technique [0002] To accurately evaluate the voltage stability of the power grid, it is necessary to accurately capture the core dynamics of the power grid and determine the current voltage stability state of the power grid. On this basis, it is also required to be able to reasonably and accurately predict the changes of the grid state in the future, and finally calculate the margin or boundary for the safe operation of the grid. Among them, the dynamic reactive power reserve can effectively reflect the voltage stability of the system, and has the advantages of intuitive and simple calculation. [0003] The existing reactive power optimization only takes the steady-state voltage distribution as the goal to control the capacitor...

AI Technical Summary

Problems solved by technology

However, due to the instantaneous nature of faults, short-term voltage stability assessment must give safety assessment results in a relatively short period of time to ensure the timeliness of the assessment results, but blindly pursuing speed may lead to inaccurate calculation results. When modeling and evaluating calculations, a balance needs to be struck between accuracy and speed

Images