A load shedding distribution method and device

Abstract

The invention discloses a method for allocating load shedding, which comprises the following steps: (1) Allocating the total required shedding in proportion to the load shedding capacity of each load shedding substation, without rounding up when allocating, to obtain the initial distribution of each load shedding substation and calculate the sum of the initial distribution of each load shedding substation, that is, the total initial distribution, and calculate the difference between the total demand and the initial distribution, that is, the remaining demand; The distribution remainder of the load sub-station; (3) arrange the distribution remainder in descending order; (4) add the load-cutting amount to each load-shedding sub-station in accordance with the order of the distribution remainder from large to small; Until the total required cutting amount is equal to the total allocated amount. The invention also discloses a corresponding load shedding distribution device. The scheme of the present invention improves the distribution accuracy of load shedding, and can effectively avoid over-cutting or under-cutting caused by rounding.

Description

technical field [0001] The invention belongs to the field of electric power system automation, and in particular relates to a load shedding distribution method and device in the electric power system. Background technique [0002] With the increasing expansion of the power system, regional power grid interconnection and west-east power transmission, large-capacity, long-distance, ultra-high voltage and ultra-high voltage transmission, AC-DC parallel transmission, centralized access to a large number of new energy sources, and the upcoming operation of the power market, etc. , so that the stability of the power system is more prominent than before. The power system stability control technology and stability control system have been widely used in various power grids across the country, and have become an indispensable part of the daily operation of the power grid. When emergency control is carried out after a power system failure occurs, it is generally necessary to take meas...

AI Technical Summary

Problems solved by technology

When emergency control is carried out after a power system failure occurs, it is generally necessary to take measures to cut off the machine at the power transmitting end, and to take load shedding measures at the power receiving end. The load-shedding substations of the subordinate load-shedding sub-stations are allocated in proportion. With the expansion of the stability control system, the number of load-shedding sub-stations is also increasing. Large distribution errors may occur. For example, for a stability control system with 20 load shedding sub-stations, if the minimum measurement unit of the system load is 1MW, the maximum possible over- Shedding 10MW load may also undercut 9MW load. Over-cutting load will increase the social impact of the accident. Too much under-cutting load may fail to achieve the expected control effect and even lead to system instability.

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