Automatic generation control (AGC) method for generating sets of hydropower station

Abstract

The invention discloses an automatic generation control (AGC) method for generating sets of a hydropower station. The AGC method is used for controlling the active power output of a plurality of generating sets according to an active power set value of a scheduling instruction, and is characterized by comprising the following steps of: 1) determining the active power adjustable range of the hydropower station when all the generating sets run in a non-oscillation area; 2) if the active power set value is within the active power adjustable range of the hydropower station, allocating the active power output of each generating set on the basis of ensuring that all the generating sets run in the non-oscillation area; and 3) if the active power set value is beyond the active power adjustable range of the hydropower station, enabling the generating sets which run in the non-oscillation area and have the highest priorities to enter an oscillation area for running in turn according to a pre-designed priority strategy. According to the AGC method for the generating sets of the hydropower station, the safety and stability of the generating sets of the hydropower station are ensured, and the safety and stability of a power grid are combined.

Description

technical field [0001] The invention belongs to the field of electric power, and in particular relates to an AGC control method for a generating set of a hydropower station. Background technique [0002] In the past, hydropower stations usually used power group adjustment devices, flow (or water level) adjustment devices, etc. to achieve load control functions. After adopting the computer monitoring system, the Automatic Generation Control (AGC) function has been widely used in the field of hydropower station control. [0003] In the load control of hydropower generating units, problems such as the non-operable area, that is, the vibration and cavitation area of ​​the turbine, are often encountered. Vibration area: When the turbine operates in a certain output range, cavitation will occur, the flow around the blades will deteriorate, the power of the turbine will decrease, the efficiency will decrease, and cavitation, denudation and even perforation will be formed in the fl...

AI Technical Summary

Problems solved by technology

The current automatic power generation control of hydropower stations has a single strategy design for turbines avoiding the vibration zone. It only makes the unit absolutely avoid the vibration zone, but does not fully consider the problems of some hydropower stations with relatively large vibration zones (more than two-thirds of the unit capacity). For special requirements, adopting the strategy of absolutely avoiding the vibration zone will greatly increase or decrease the output of the unit, resulting in a greater impact on the stable cross-section power flow of the power grid

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