Substation area control method and system of microgrid operation mode

Abstract

The invention relates to a substation area control method and system of a microgrid operation mode. The substation area control method comprises the following steps of: when a power generation system is subjected to grid-connected power generation according to a first operation mode, if an island operation state appears and a grid-connected power generation mode exits, judging whether the low voltage side of a transformer for a substation corresponding to a second operation mode of the power generation system has voltage, judging which state automatic throw-in equipment of emergency power supply is; if the low voltage side has voltage and is in a commissioning state, receiving correct action formation of the automatic throw-in equipment of emergency power supply and starting the second operation mode; and if the low voltage side does not have voltage or the automatic throw-in equipment of emergency power supply is in an exit state, or the correct action information of the automatic throw-in equipment of emergency power supply is not received within preset time, locking the automatic throw-in equipment of emergency power supply and then starting the microgrid operation mode. According to the substation area control method and system, concentrated judgment and computation are carried out by acquiring real-time operation information of parts in the substation transformer area, which are related to the power generation system, and effective control based on the substation-grid microgrid operation mode is achieved.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a station domain control method and system of a microgrid operation mode. Background technique [0002] The power source in the microgrid is called a microsource, and the microgrid can run in parallel with the power system or in an island. Regardless of the operating mode, it is necessary to effectively control the micro-source to maintain the stability of the system voltage and frequency. During grid-connected operation, the power system provides voltage support, each micro-source adopts output power control mode, and the micro-source is regarded as a schedulable and controllable current source. During island operation, each micro-source is required to automatically adjust power output following load changes, and at the same time meet the output voltage and frequency changes within the allowable range, which requires the micro-source to have a certain power generation c...

AI Technical Summary

Problems solved by technology

Because the traditional microgrid control technology cannot control the load capacity, if the load capacity is greater than the microsource capacity during the island operation, the microsource in the island operation system will be forced to stop running, and the continuous and reliable operation of the microgrid in the island mode cannot be guaranteed.

[0003] The conversion between the grid-connected operation mode and the island operation mode of the traditional microgrid is realized by judging local parameters, and information sharing between devices cannot be conveniently realized, and the degree of automation is low

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