High permeability wind-solar-hydropower active power control method based on sectional safety constraint

Abstract

The invention belongs to the technical field of power system economic dispatch, and particularly relates to a high-permeability wind-solar-hydropower active power control method based on a section safety constraint. The control method divides the section into four states: safety, warning, critical buffer and over-limit. The establishment of the critical buffer state can avoid the over-limit causedby factors such as the inaccurate response of the plant station, so as to maximize the output of the plant with the full utilization of the section. At the same time, factory stations access unfriendly can be punished and factory stations access friendly can be rewarded combined with the assessment score of the power station, so as to promote the positive response and fair scheduling of the plantto the instructions. High permeability wind-solar-hydropower active power control method based on sectional safety constraints also considers the trigger mechanism for emergencies, eliminates sectionover-limit due to various events, without waiting for the end of the instruction cycle. A large-scale fair scheduling under multiple nested sections can be ensured by section search method "from outside to inside".

Description

technical field [0001] The invention belongs to the technical field of electric power system economic dispatching, and in particular relates to a high-permeability wind-light-water active power control method based on section safety constraints. Background technique [0002] my country has built large-scale wind farms, hydropower stations and photovoltaic power station groups. Due to the high penetration rate of new energy and its output randomness and volatility in some areas, improper regulation of new energy can easily cause transmission congestion in outgoing channels, affecting the safe and stable operation of the power grid and the efficient delivery of new energy. Since new energy delivery channels are often composed of multi-level sections, and each section is connected to many different plants and stations, it is necessary to formulate a real-time scheduling control strategy for wind, light, and water that takes into account the safety constraints of multi-level nes...

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Problems solved by technology

[0003] Issues related to high-penetration new energy dispatching control are one of the current research hotspots, but the existing traditional control strategies cannot effectively deal with the frequent transgression of sections caused by special circumstances, and the feedback on the command response of the plant is not timely enough. The active power control sequence for multiple nested sections also needs to be improved

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