Random dynamic economic dispatching method for renewable energy sources based on convex relaxation

Abstract

The invention discloses a random dynamic economic dispatching method for renewable energy sources based on convex relaxation. The method comprises the following steps: establishing a dynamic economicdispatching model considering the randomness of renewable energy sources; Converting the random dynamic economic dispatching model into a deterministic economic dispatching model through an opportunity constrained convex relaxation algorithm; And solving a deterministic dynamic economic dispatching model, and determining and dispatching a plan of the renewable energy unit. The method is suitable for economic dispatching of the power system containing large-scale wind, light and other renewable energy sources for power generation, the risk of the system is effectively reduced, the dispatching cost is saved, the consumption level of the wind, light and other renewable energy sources is improved, and the high efficiency and flexibility of economic dispatching of the system are improved.

Description

technical field [0001] The invention belongs to the technical field of power system operation, in particular to a convex relaxation-based stochastic dynamic economic scheduling method for renewable energy. Background technique [0002] The development and utilization of renewable energy to realize the sustainable development of energy is a major measure of my country's energy development strategy. As wind power and photovoltaics are connected to the grid on a large scale, their volatility and randomness make traditional scheduling methods difficult to apply. [0003] In order to reduce the adverse impact of the uncertainty of new energy sources on the power grid, robust economic dispatch is a feasible solution. However, due to the conservatism of robust optimization, it will bring unnecessary costs to dispatch, so the stochastic economic Scheduling is an effective modeling strategy to reduce system operation risk and reduce cost. [0004] The optimization problem of chance...

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Problems solved by technology

[0006] However, it is very difficult to solve the chance-constrained optimization problem. The existing solution methods generally have the disadvantage of large amount of calculation, so the efficiency and flexibility of economic dispatch cannot be realized. The proposal of dynamic economic dispatch considering the randomness of renewable energy The model and efficient solution are the problems that need to be solved urgently

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