Active-reactive coordinated real-time scheduling method and system under uncertainty of probability distribution

Abstract

The invention belongs to the field of power scheduling, and provides an active-reactive coordinated real-time scheduling method and system under uncertainty of probability distribution. The method comprises the steps of obtaining operation parameters of a power system, adopting a voltage amplitude and phase angle decoupling linear power flow response model, considering operation scheduling cost and operation risk cost, and constructing an active-reactive coordinated robust real-time scheduling model under the uncertainty of probability distribution; solving an active-reactive coordinated robust real-time scheduling model under the uncertainty of probability distribution based on an optimization constraint condition to obtain a corresponding decision variable value when the total operation cost of the power system is lowest; and forming a real-time scheduling instruction of the power system to improve the operation economy and the node voltage safety level of the power system at the same time.

Description

technical field [0001] The invention belongs to the field of power dispatching, in particular to a real-time dispatching method and system for active-reactive power coordination under uncertain probability distribution. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Real-time power dispatching is one of the key parts of power system operation scheduling, and its goal is to balance the load with the supply and demand fluctuations caused by renewable energy sources on a minute time scale. With the large-scale penetration of renewable energy, while bringing huge benefits to the environment, there are also undeniable challenges. Real-time power dispatch methods need to be improved to deal with the challenges posed by renewable energy sources, such as the uncertainty caused by the intermittency of renewable energy sources. [0004] Robust op...

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Problems solved by technology

However, in order to obtain a trackable model, the model usually uses a relaxation transformation, which may lead to an infeasible solution, and the amount of calculation increases with the increase of the used data

On the other hand, the existing model application ignores the safety of the voltage, and the obtained operation strategy may cause the voltage problem of some critical buses

At the same time, the impact of voltage security constraints on the allowable range of wind power is ignored, which not only affects the power dispatch strategy, but also affects the solvability of the problem, especially in the case of insufficient system reactive power reserve

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