A control method for optimal scheduling of hydropower plant reservoirs based on water level control coefficients

Abstract

The invention discloses a hydraulic power plant reservoir optimal scheduling control method based on a water level control coefficient. The hydraulic power plant reservoir optimal scheduling control method comprises the following steps: a step 1, acquiring historical operation water level data and reservoir scheduling graph data, and calculating a monthly water level control coefficient target value Ks target of a j-th month of the hydraulic power plant reservoir; a step 2, acquiring practical operation average water level data Sj of the j-th month of the hydraulic power plant reservoir, and calculating a water level control coefficient actual value Ks of the j-th month of the reservoir according to a formula described in the specification, wherein S0 is level of dead water and S1 is normal high water level; a step 3, comparing the monthly water level control coefficient actual value Ks with the monthly water level control coefficient target value Ks target, and judging a reservoir optimal scheduling effect; a step 4, controlling optimal scheduling of the hydraulic power plant according to the reservoir optimal scheduling effect. The hydraulic power plant reservoir optimal scheduling control method can perform optimal scheduling control which is scientific and reasonable, widely applicable, simple and convenient to use on the hydraulic power plant reservoir.

Description

technical field [0001] The invention relates to a water level control coefficient-based optimal scheduling control method for a hydropower plant reservoir, belonging to the technical field of hydropower optimal scheduling control. Background technique [0002] The optimal scheduling of hydropower plants is essentially to generate more electricity through various measures under the same amount of water generated, or to try to consume less water under the same amount of electricity generated. As we all know, the formula for calculating the generating capacity of a hydroelectric unit is E=9.81QHη, where E is the generating capacity, Q is the generating water volume, H is the generating water head, and η is the efficiency of the generating set. When the hydropower plant is completed and put into operation, η can be regarded as a constant. When E is constant, the larger H is, the smaller Q will be. That is to say, by increasing the water head of power generation, the water consu...

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Problems solved by technology

[0003] For optimal dispatching of hydropower, the dispatching control indicators generally used include comprehensive output coefficient, load rate during water abandonment period, reservoir assessment water level, hydropower plant energy storage curve, water energy utilization improvement rate and other indicators. Some enterprises have control indicators for hydropower dispatching operation There are as many as 60, and the optimal scheduling control is adjusted according to the evaluation results. However, due to the many parameters involved and complex formulas, the process is lengthy, the application is cumbersome, and the operability is poor.

However, if the parameters and calculation formulas are simplified, the accuracy and scope of application will be obviously limited. At present, there is no scientific, reasonable, easy-to-use method to control the optimal dispatch by controlling the water level of the reservoir.

The installed capacity of hydropower plants under the jurisdiction of various power generation groups in China, the hydrological characteristics of the river basin, the regulation performance of reservoirs, the security constraints of the power grid, and the conditions of the power market vary widely. At present, there is no widely applicable index for optimal dispatching and control of different hydropower plants. Horizontal and vertical benchmarking

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