Method for restoring power supply in power system

Abstract

The invention relates to a method for restoring power supply, in particular to a method for restoring power supply in a power system. In the method, the power supply restoration strategy adopts the islanding algorithm based on connectivity of the short circuit fast recognition network. The method has the following advantages: adopting optimization of tangential load of the intelligent optimization algorithm and network reconfiguration, dividing the optimization process into two parts, respectively establishing mathematical models, reducing the optimization variable dimension and the quantity of combination, shortening the optimization time, effectively controlling the combination explosion and solving the problem of weight values of multiple objective functions; and adopting the flexible power flow algorithm, introducing power quality (frequency) constraint into power supply restoration in the power system, taking the static characteristic of the engine into consideration, using the system frequency as the constrain condition of power supply restoration and improving the load restoration quantity.

Description

A method for restoring power supply in a power system technical field The invention relates to a power supply recovery method, in particular to a power system power supply recovery method. Background technique With the continuous expansion of the scale of the interconnected grid, the structure of the grid is becoming more and more complex. Once a fault or stability problem occurs, it may cause a large-scale power outage. Power system recovery control is an important means to ensure the reliability of power supply, and its task is to restore power supply safely, quickly and economically after a blackout occurs. With the interconnection of large power grids and the rapid growth of loads, the scale of the power system is becoming larger and larger, and local faults are likely to spread to the entire network and cause large-scale power outages. At the same time, the market-oriented reform of the electric power industry makes the operation of the system closer and closer to it...

AI Technical Summary

Problems solved by technology

Another purpose of the present invention is to solve the difficulty in determining the weight coefficients in the synthesis of multiple optimization objectives in the power supply recovery model existing in the prior art; to solve the overall optimization of the power supply recovery model, the possible solution space is very large, resulting in a large calculation Burden, there are technical problems such as obstacles in practical application; provide a double-layer optimization that can quickly perform load recovery and network reconfiguration optimization, realize power supply recovery in the power-off area, and realize power quality (frequency) constraints in the recovery area , a power system power supply recovery method that is more in line with the actual operation of the microgrid

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