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Optimization control method for pumped storage power station in high-proportion wind-solar power system

A pumped-storage power station and power system technology, which is applied in the field of optimal control of pumped-storage power stations, can solve problems such as the optimization control method of the pumped-storage system that has not yet been improved, and achieve the effect of avoiding low efficiency and reducing start-up and stop costs

Pending Publication Date: 2022-03-08
NORTHEAST DIANLI UNIVERSITY
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing technology, the plant-level unit operation mode of the pumped storage power station is relatively simple. In terms of overall operating efficiency, there is no optimal control method for improving the pumped storage system.

Method used

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  • Optimization control method for pumped storage power station in high-proportion wind-solar power system
  • Optimization control method for pumped storage power station in high-proportion wind-solar power system
  • Optimization control method for pumped storage power station in high-proportion wind-solar power system

Examples

Experimental program
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Effect test

Embodiment

[0161] Taking the wind power, photovoltaic and load data of a power grid in 2020 as an example, the peak shaving scenario with the participation of the pumped storage power station is analyzed. The total installed capacity of the pumped storage power station is 1200MW, the daily pumping hours are 7 hours, and the daily power generation hours are 7 hours (including 5 hours of full-load power generation); four 300MW reversible pumped storage units are used, and the power of each unit in the power generation state is continuous. adjustable.

[0162] The remaining parameters are listed in Table 1 and Table 2 below.

[0163] Table 1 Climbing speed parameters of pumped storage power station

[0164]

[0165] Table 2 Working condition coefficient of pumped storage power station

[0166]

[0167]

[0168] (1) Select the equivalent load curve on July 22 for peak shaving and valley filling:

[0169] as attached figure 2 As shown, the equivalent load changes before and afte...

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Abstract

According to the optimal control method for the pumped storage power station in the high-proportion wind and light electric power system, related constraints such as a system net rack, electric power and electric quantity balance and pumped storage unit operation constraints are comprehensively considered, maximization of the operation efficiency of the pumped storage system is taken as a target, randomness and volatility of output of renewable energy sources such as wind power and photovoltaic are considered, and optimal control of the pumped storage power station in the high-proportion wind and light electric power system is achieved. A double-layer optimization model is established, the unit most suitable for starting and the power distributed to the unit are selected in each time period, so that each unit in each time period is in a high-efficiency state, the number change of participated pumping and storage units is consistent with the change of the total pumping / generating power, and the overall efficiency of the pumping and storage system is close to the ideal working efficiency; and the start-stop cost of the unit and the harm to the service life of the unit are effectively reduced.

Description

technical field [0001] The invention relates to the technical field of pumped storage energy, in particular to an optimal control method for a pumped storage power station in a high-proportion wind-solar power system. Background technique [0002] Wind power and photovoltaics are the two most widely used and fastest-growing new energy power generation technologies. The development of wind power and photovoltaics is an important means for my country to further promote the energy production and consumption revolution. However, due to the uncertainties and strong fluctuations in output of wind power and photovoltaics It brings great difficulties to the stable operation of the power system. The pumped storage power station has the characteristics of fast start-up speed, fast response speed and strong peak-shaving capability. As the most mature energy storage technology today, pumped storage technology has great potential in the application of new energy power generation, which ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04H02J3/38H02J3/46
CPCG05B13/042H02J3/381H02J3/466H02J2203/20H02J2300/22H02J2300/28Y02E10/76
Inventor 朱星旭周家旭李翠萍李军徽罗铉众司文博王晓龙
Owner NORTHEAST DIANLI UNIVERSITY
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