Medium-short term coordinated dispatching method for ultra-high voltage AC-DC hybrid power grid

Abstract

The invention provides a medium-short term coordinated dispatching method for ultra-high voltage AC-DC hybrid power grid, and relates to the field of electrical power system power generation dispatching. When electricity is transmitted from west to east, feed-in scale is sharply increased in a low peak period, and load adjustment difficulty of a receiving power network is significantly increased, causing a power grid medium-short term start-up mode and running plan arrangement difficulty to be increased accordingly. The method comprises medium term plan formulation and short term plan formulation. The medium term plan formulation adopts a month as a decision cycle and a day as a calculation period, on the conditions of guaranteeing electrical power system load requirements and operational parameters of a power station and a machine set, monthly electricity is divided into days, and a daily start-up mode of the machine set is optimized; the short term plant forms a 96-point power output plan of daily electricity according to a short-term load prediction result; rolling amendment is conducted on an original medium-term power generating plan according to the latest prediction information of the load and machine set actual electricity completion situation; according to the technical scheme, frequent start-ups and stops of the power generating machine set are avoided, effective engagement and mutual coordination between a medium term and short term power generating plan are achieved.

Description

technical field [0001] The invention relates to the field of power system power generation dispatching, in particular to a medium- and short-term coordinated dispatching method for an ultra-high voltage AC / DC hybrid power grid. Background technique [0002] With the rapid development of UHV AC / DC transmission projects in my country in recent years, large-scale power in the west has been transmitted to thermal power-dominated areas in the east, which has largely eased the tension in power consumption in the east. With the rapid increase in scale, the load adjustment difficulty of the receiving end power grid has increased significantly, which has led to an increase in the difficulty of short-term start-up mode and operation planning of the power grid. How to reasonably arrange the operation mode of the receiving end has become one of the main problems faced by these power grids. Effective technical means are urgently needed. [0003] The medium-term power generation plan of th...

AI Technical Summary

Problems solved by technology

The research on the medium and short-term coordinated operation of the power system has attracted the attention of scholars at home and abroad, but most of the research focuses on the rolling coordination of long-term and short-term power generation planning and short-term and real-time dispatching, and seldom involves the medium- and short-term coordinated dispatching problem. The optimization model Most of them adopt the single goal of "three publics" or energy saving

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