A real-time load adjustment method for hydrothermal power in provincial power grid under changing incoming water

Abstract

The invention discloses a water power and thermal power generation real-time load adjusting method of a provincial grid under inflow change. For multiple states that inflow forecast is not accurate, or inflow of a drainage area upstream and an interval is changed, on the basis that the current operation working states of a thermal power generation load adjusting bandwidth and a water-power plant are fully considered, water power and thermal power generation output power is adjusted through a real-time load adjusting policy, so that a runoff forecast error is effectively reduced, and adverse influence to future time interval scheduling production of a cascade hydropower station by inflow change is effectively reduced. When the inflow is increased, on the premise that the cascade hydropower station satisfies tail water level constraint and water is not discarded, the compensation effect of the cascade hydropower station is fully exerted, and thermal power generation coal consumption is reduced; when the inflow is reduced, on the premise that the cascade hydropower station satisfies draining flow rate, grid load balance and tail water level constraint, load among cascades is reasonably distributed, the energy-accumulating effect of the cascade hydropower station is fully exerted, the thermal power generation output power is timely improved, a load balance requirement is met, and safe and stable operation of the grid is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of optimal operation of hydropower energy and optimal scheduling of electric power system power generation, and more specifically relates to a method for real-time load adjustment of hydrothermal power in a provincial power grid under changing incoming water. Background technique [0002] In the actual operation of hydropower stations, when the inflow forecast is inaccurate or the inflow in the upper reaches of the river basin and the interval changes, the power generation output that may be generated by the actual inflow of the cascade hydropower station will not match the planned load that the power grid makes based on the deterministic water inflow forecast and assigned to the hydropower station. . If the hydropower station still operates according to the original planned load, it will easily lead to the destruction of the water level constraints or the generation of a large amount of abandoned water duri...

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Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides a real-time load adjustment method for provincial power grid water and thermal power under the change of incoming water, which solves the problems caused by inaccurate short-term incoming water forecast or changes in incoming water in the upper reaches of the river basin and in intervals. The mismatch between the actual power generation output of the cascade hydropower station and the planned load of the power grid based on the deterministic water inflow forecast can effectively reduce the runoff forecast error and the adverse impact of the change of inflow water on the future scheduling of the cascade hydropower station, and adjust the hydropower station in real time according to the actual water inflow Power generation output, and make the formulated hydrothermal power output adjustment plan meet the operation requirements of the power station and the constraints of safe and stable operation of the power grid

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