Nonlinearity-considered electromagnetic transient real-time simulation method of transformer substation

Abstract

The invention provides a nonlinearity-considered electromagnetic transient real-time simulation method of a transformer substation. The method comprises the following steps: preparing for simulation off line; differencing transformer substation elements according to the selection of simulation step size delta t; converting electric network of the transformer substation elements into corresponding an adjoint network through an adjoint circuit; reordering a differenced nodal admittance matrix according to the nonlinear local iterating principle and the minimum degree independent set method; arranging instructions performed by an arithmetical unit according to the idea of solving a nodal voltage equation by the gauss elimination; calculating real-time simulation on line, wherein the online calculation specifically includes the historical current source calculation of the adjoint circuit, the nodal injection current of the adjoint network, the order elimination of the nodal voltage equation, reversed order back substitution of the nodal voltage equation, branch voltage calculation and branch current calculation which are processed in parallel through a plurality of arithmetical units; quickly simulating parameter read-write interaction between the arithmetical units and a data storage space by the simulation parameter decoding query method. With the adoption of the method, the real-time performance of electromagnetic transient real-time simulation of the transformer substation can be ensured.

Description

technical field [0001] The invention relates to an electromagnetic transient real-time simulation method. In particular, it relates to a real-time simulation method of substation electromagnetic transient state considering nonlinearity. Background technique [0002] With the gradual expansion of the scale of the national interconnected grid, the grid structure and its operation mode become increasingly complex. As a key part of the power system, the substation is particularly important to ensure its safe operation. With the improvement of substation automation, the quality training of operating personnel also needs to be improved accordingly. Therefore, technical training for substation operators at all levels is an important measure to ensure safe production of electricity. [0003] At present, there are mainly four types of substation simulation and training systems: [0004] ①The obvious disadvantage of pure software simulation for the primary side system and secondar...

AI Technical Summary

Problems solved by technology

[0004] ①Pure software simulation for the primary side system and secondary side equipment of the substation, its obvious disadvantage is that the trainers cannot have a deeper understanding of the real secondary equipment

[0005] ②Using the protection tester device to simulate the primary side system of the substation, this method allows the secondary side to be connected to real physical equipment, but its inherent disadvantage is that the output signals of each channel are unidirectional, which cannot form a closed-loop test

[0006] ③Using real physical equipment to simulate the primary side system of the substation can realize real-time simulation of the primary side of the substation and conduct closed-loop testing on the secondary equipment. substation simulation training

Images