Generator set active power real-time dispatching method considering wind power prediction error

Abstract

The invention discloses an electric system active power real-time dispatching method considering wind power prediction error. The electric system active power real-time dispatching method comprises the following steps of describing random distribution character of the wind power prediction error by using Laplace distribution; by taking economic efficiency optimum and wind curtailment minimum as two targets, introducing a chance constraint condition; solving active power flow probability distribution of a system on the basis of a probabilistic power flow method for Latin hypercube sampling; establishing a buffer generator set active power optimum allocation model considering the wind power prediction error, and solving a chance constraint planning model by adopting an improved genetic algorithm. According to the electric system active power real-time dispatching method disclosed by the invention, the wind power prediction error is considered during real-time dispatching, power unbalance and flow off-limit brought to the system by wind power output offset can be avoided, and the safe operation of the system is guaranteed; moreover, while the wind power prediction error is assimilated, the wind power accepting ability is increased by the system.

Description

technical field [0001] The invention relates to the field of operation control of a power grid, in particular to a dispatching method of a wind power new energy grid. Background technique [0002] In recent years, with the increasing adjustment of domestic power supply structure and the rapid development of new energy power generation technology, the capacity of connecting to the power grid has increased. However, due to the inherent randomness and volatility of wind power generation, when it is connected to the system on a large scale, it will seriously affect the operation of the power grid and even endanger the safety of the power grid. [0003] The economical dispatching problem of power system aims at economical optimization, and it is an optimization problem that satisfies the system power balance and operation constraints. In recent years, according to the idea of ​​"multi-level coordination and level-by-level refinement", the control is divided into four stages: day...

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Problems solved by technology

[0004] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a method for real-time dispatching of unit active power considering wind power forecasting errors, which is used to solve the problem of large wind power forecasting errors during real-time dispatching in the existing power system economic dispatching question

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