Method, device and electronic equipment for establishing optimal power flow model of power grid

Abstract

The invention provides a method and a device for establishing an optimal power flow model of a power grid and electronic equipment, and relates to the technical field of power grid dispatching. According to the invention, the structural parameters of a VSC-HVDC power grid are obtained; according to the structural parameters of the VSC-HVDC power grid, the safety index function and the constraint condition of the VSC-HVDC power grid are determined; the safety index function of the VSC-HVDC power grid is economically quantized and then the comprehensive cost function of the VSC-HVDC power grid is obtained; a mode for the optimal power flow model of the VSC-HVDC power grid is established according to the comprehensive cost function and the constraint condition of the VSC-HVDC power grid. According to the invention, all safety index functions formed in the lines of the power grid line are economically quantized and added into the optimal power flow basic model, so that the purpose of balancing safety and economy is achieved. Therefore, the technical effect of reducing the economic cost on the premise that the safety performance of the power grid is met is achieved.

Description

technical field [0001] The invention relates to the technical field of power grid dispatching, in particular to a method, device and electronic equipment for establishing an optimal power flow model of a power grid. Background technique [0002] As the flexible DC transmission technology is widely used in new energy grid connection, long-distance power transmission, and construction of large-scale AC-DC grids, the traditional security-constrained optimal power flow problems for AC grids are increasingly combined with VSC-HVDC (Voltage Source Converter-Based HVDC, voltage source converter type DC transmission) into consideration. Currently, there are two types of methods for safety-constrained optimal power flow: preventive safety-constrained optimal power flow and corrective safety-constrained optimal power flow. These two types of methods take the sum of the cost of generating units under the safety constraints as the objective function for optimization. For VSC-HVDC powe...

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Problems solved by technology

[0003] In view of this, the object of the present invention is to provide a power grid optimal power flow model establishment method, device and electronic equipment to solve the problems in the prior art that are often contradictory for VSC-HVDC power grids due to safety and economy. It is difficult to meet both goals at the same time, especially the importance of security cannot be measured in unison with economics, and it is a technical problem that has a great impact on the dispatching work of the power grid.

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