Black-start power supply restoration method

Abstract

The invention discloses a black-start power supply restoration method, and belongs to the field of electric power system safety defense and restoration control. According to the method, a power supplynetwork model is simplified in to a point and line module, a power failure area is divided, important degree of the areas is weighed, power is supplied for electric plants in the areas with large priority weight values by the aid of a selected black-start power supply, an electric plant is started and supplies power for other loads in the areas, electric plants in surrounding sub areas are started by the aid of the remaining capacity of secondary power supply restoration sub areas to drive power to be supplied for the loads of surrounding sub areas, and comprehensive running of all electric plants and loads in the all sub areas is finally achieved. According the black-start power supply restoration method, power can be preferentially supplied for the important loads, a grid structure is furthest restored, load power supply is restored, power supply is accelerated, so that running safety and running stability of a power grid are ensured, and power quality is ensured.

Description

technical field [0001] The invention belongs to the field of power system security defense and recovery control, in particular to a black-start power supply recovery method. Background technique [0002] At present, with the strengthening of power grid construction, the power grid is becoming stronger and more complex. People's production and life are more and more dependent on electricity. Although the construction of power grids has been one of the main goals to improve the self-healing ability of the power system, it is technically unrealistic and economically feasible to completely eliminate the occurrence of large-scale power outages. Ice disasters, typhoons and other harsh natural climates, as well as wars, have seriously threatened the security of the power grid. In recent years, large-scale power outages at home and abroad have also occurred frequently. [0003] In the existing black-start methods, there are mainly three research directions: the first is to evalua...

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Problems solved by technology

[0003] In the existing black start methods, there are mainly three research directions: the first one is to evaluate several existing black start schemes, and select the optimal scheme according to the principle of judgment. It is used under certain circumstances; the second is black-start multi-objective optimization and decision-making. By formulating optimization objectives with different focuses and combining intelligent algorithms to obtain a solution, this solution is very dependent on algorithms, and often for complex network systems, There are problems of long calculation cycle and unreasonable scheme; the third method is black start partition recovery. For larger network systems, this method often requires sufficient distributed power sources or units that are easy to start in the network, and has a negative impact on the power grid itself. more demanding

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