Equivalent coordinative optimization method for large-scale power grid dispatching plan

Abstract

The invention provides an equivalent coordinative optimization method for a large-scale power grid dispatching plan. The optimization method comprises the steps as follows: (1) a large power grid is divided into a plurality of regional power grids, and the regional power grids are taken as equivalent nodes; (2) the regional power grids submit information of the equivalent nodes to the whole grid; (3) the whole grid determines a generation dispatching plan under the equivalent regional power grids, and issues a connecting line plan between the regions, planned total output of the regional power grids and a plan of a direct dispatching set; (4) the regional power grids calculate and determine output plans of regional sets according to the planned total output of the regional power grids, and calculate locational marginal cost; and (5) whether full-grid optimization is converged or not is judged through the marginal cost of two ends of a connection line, if so, calculation is ended, if not, the set which affects the grid security constraint corrects output bounds according to the optimization result and turns to the step (2). The iteration times can be controlled; the convergence is rapid; and rapid determination of the large power grid dispatching plan can be achieved.

Description

technical field [0001] The invention belongs to the technical field of electric power system scheduling automation, and in particular relates to an equivalent coordination and optimization method for a large-scale power grid scheduling plan. Background technique [0002] The optimization problem of large-scale power grid dispatching plan is a mathematical programming problem with super-large-scale, multi-objective, complex constraints, and many influencing factors. Conventional modeling methods for this type of system have been unable to solve it. To achieve multi-area joint optimization or overall optimization, the current methods are mainly the application of large-scale system theory, simplified equivalents and other methods. [0003] The existing large-scale power grid equivalent method usually simply converts it into an equivalent unit, but the information extraction of unit parameters is not accurate enough, the equivalent grid information cannot be accurately expresse...

AI Technical Summary

Problems solved by technology

[0002] The optimization problem of large-scale power grid dispatching plan is a mathematical programming problem with super large-scale, multi-objective, complex constraints and many influencing factors, which cannot be solved by conventional modeling methods for this type of system

For example, when the system has N units, L branches, and T periods, the scale of the economic dispatch problem is a multiple of NT and LT, which is a very complex problem for large power systems

Images