Partition restoration method of power system containing micro-grid

Abstract

The invention relates to a partition restoration method of a power system containing a micro-grid, comprising the following steps: simplifying the power system containing the micro-grid into a networktopology diagram; solving the probability and time of successful restoration of the node to be restored by different partitions by utilizing the minimum path method, and calculating the partition decision function value to determine the partition of the node to be restored initially; verifying and adjusting the zoning results; establishing the unit start-up sequence optimization model in each region and transforming the model into a mixed integer linear programming problem and solving the problem by an linear planning solver ILOG CPLEX. According to the partition result and the unit start-upsequence optimization result, the system black-start scheme is established. The method of the invention realizes the fast zoning of the power system containing the micro-grid after the power outage and the optimization of the startup sequence of the unit, and accelerates the black startup process of the system.

Description

technical field [0001] The present invention relates to the technical field of black start, and more specifically, to a partition restoration method of a power system including a microgrid. Background technique [0002] With the development of regional power grid interconnection and UHV AC and DC projects, the grid structure is becoming more and more complex, the factors affecting the safety and stability of the grid are increasing, and the risk of major blackouts is increasing. It is of great significance to formulate a reasonable black start plan to quickly restore load power supply after a blackout, reduce economic losses and ensure social stability. When the system has multiple black-start power supplies, the entire network is usually partitioned, and each partition is restored independently and in parallel to improve the feasibility and reliability of the restoration scheme. [0003] Under the international background of energy shortage, the rapid development of photov...

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Problems solved by technology

[0004] The existing research mainly focuses on the black start of the traditional power grid, and rarely involves the black start of the power system involving the microgrid. In the case of a lack of black start power, parallel recovery strategies cannot be implemented.

The start-up process of the unit is seldom taken into account in the optimization of the start-up sequence of the units in each partition, and the solution method mostly uses intelligent optimization algorithms such as particle swarm algorithm and genetic algorithm, and the solution speed is difficult to guarantee

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