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Load curve quantization-based pumped storage power station optimized dispatching method

A pumped-storage power station and load curve technology is applied in the field of optimal dispatching of pumped-storage power stations based on load curve quantification to achieve the effects of small adjustment, stable load and optimized load curve.

Active Publication Date: 2014-05-14
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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Problems solved by technology

At present, the starting point or objective function of optimal dispatching of pumped storage power plants is the most economical system operation, the lowest power generation operation cost and other economic indicators. The economic evaluation is carried out through the set fuel cost and power loss loss. The difference will affect the optimization result to a certain extent, and needs to be further improved

Method used

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  • Load curve quantization-based pumped storage power station optimized dispatching method
  • Load curve quantization-based pumped storage power station optimized dispatching method
  • Load curve quantization-based pumped storage power station optimized dispatching method

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Embodiment

[0048] A method for optimal dispatching of pumped storage power plants based on load curve quantification, including the following steps, such as figure 1 Shown:

[0049] (1) Arranging unit maintenance plan: determine the number of available thermal power units and the number of pumped storage power generation units; and enter the parameters of available thermal power units and pumped storage power generation units; the parameters include the rated power generation of each thermal power unit, each pumped storage The rated generating power of the generator set of the power station, the pumping-generation cycle efficiency of the pumped storage power station, the given water storage capacity and the maximum storage capacity;

[0050] (2) Collect power system load forecast data: the time interval of the power system load forecast data is fixed at Δ t , the unit is h, and there are N points in total; under the time-power system load forecast value coordinate system, connect two ad...

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Abstract

The invention discloses a load curve quantization-based pumped storage power station optimized dispatching method. The method comprises the following steps: arranging a set repairing plan; collecting load predetermination data of a power system; establishing a state transition equation of a pumped storage power station and a constraint condition thereof; establishing a load curve quantization index of a thermal power generating set; and using load curve quantization index minimization of the thermal power generating set as an objective function and carrying out optimized dispatching on the operation of the pumped storage power station by using a dynamic planning method. According to the invention, the fluctuation degree of a load curve carried by a thermal power generating set can be reduced; the power generation load rate can be improved; and the power supply coal consumption of the thermal power generating set can be reduced.

Description

technical field [0001] The invention relates to the technology of a pumped storage power station, in particular to an optimal scheduling method for a pumped storage power station based on load curve quantization. Background technique [0002] The pumped storage power station uses the excess electric energy in the power system to pump the water from the low-elevation reservoir (commonly known as "lower reservoir") to the high-elevation reservoir (commonly known as "upper reservoir") and store it in the form of potential energy. When the system needs electricity, the hydropower station releases water from the upper reservoir to the lower reservoir for power generation. Whether the pumped storage power station is used for frequency regulation, emergency backup or load following, it can provide active power support at a rate that meets the system stability requirements when the grid needs it, so as to maintain the safety and stability of the system operation. In the past ten ye...

Claims

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Application Information

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IPC IPC(8): H02J3/46
Inventor 李燕青谢红玲赵亮沈博一李翔王坚梁志飞傅志伟孙凯航魏方园
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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