Optimized operation method of pumped-storage power station and wind power combined system

Abstract

The invention relates to an optimized operation method of a pumped-storage power station and wind power combined system and belongs to the field of optimized operation of power systems. The method includes: building an optimized operation model of the pumped-storage power station and wind power combined system based on a unit combination, which uses lowest grid generation cost as a target function, constraint conditions of power balance constraint, spinning reserve constraint, climbing ability constraint, unit characteristic constraint and pumped-storage power station constraint, and boundary conditions of a daily load curve, grid loss and power parameters; solving the model to obtain an operation scheduling command to allow optimized operation of the combined system. Wind power intermittence, volatility and prediction inaccuracy are fully considered, and the spinning reverse constraint is corrected to optimize the operation of the combined system; by the use of the method, evident benefits are brought to the pumped-storage power station, in terms of hump modulation and trough stuffing, wind power fluctuation balancing, wind curtailment reduction and system coal consumption reduction.

Description

technical field [0001] The invention belongs to the field of optimized operation of electric power systems, and in particular relates to a combined optimal operation method of a pumped storage power station and wind power. Background technique [0002] In recent years, China's wind power installed capacity has grown rapidly. Wind power has the characteristics of strong randomness, intermittence, volatility, and anti-peaking (the wind is often the strongest when the load is low at night), and the existing wind power prediction technology has large errors. Therefore, large-scale wind power is connected to the grid for power generation. It has brought great difficulties, mainly reflected in system backup, power balance, peak shaving and frequency modulation, network security and other aspects. The power grid must provide sufficient peak-shaving and frequency-regulating capacity for wind power to ensure safe and stable operation of the power grid and peak-to-valley difference s...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the existing combined optimal operation methods of pumped storage power plants and wind power only incorporate wind power into the model as a negative load, and lack consideration of the intermittency, volatility and forecast inaccuracy of wind power.

Images