Novel parasitic switch model

Abstract

The invention relates to a novel parasitic switch model. On the basis of a variable-resistance switch model, a switch and an electrical element connected with the switch are combined to form the novel parasitic switch model. The novel parasitic switch model replaces the switch and the electrical element connected with the switch to be substituted into a simulation system admittance matrix as a whole. The electrical element is a resistive element or an inductive element or a capacitive element or a circuit. According to the novel parasitic switch model, due to the fact that the switch is combined with the related element, the switch does not need to be considered separately during simulation, and the number of dimensions of the system admittance matrix is effectively reduced; moreover, when the switch conducts the pulling-closing action, it is only required that the element value at the corresponding position in the admittance matrix is corrected, an admittance matrix does not need to be formed again, therefore, the simulation calculation amount is reduced and the simulation speed and the simulation efficiency are improved. In addition, according to related calculation, the switch model also has higher simulation precision.

Description

technical field [0001] This patent belongs to the technical field of power dispatch control and automation, especially a new parasitic switch model. Background technique [0002] In recent years, with the maturity and application of UHV power transmission and flexible power transmission technology, the scale of the power system has continued to expand, which has led to a continuous increase in the number of components in a system. Although the electromagnetic transient program of the current power system is relatively complete and the related algorithms have been optimized, due to the increasingly large scale and high complexity, it is becoming more and more difficult to simulate the electromagnetic transient state of the actual system. The action process of the switch is the key to the electromagnetic transient simulation, which requires accurate modeling of the switching elements. [0003] At present, the commonly used switch models mainly include ideal switch model, prec...

AI Technical Summary

Problems solved by technology

The ideal switch model is realized by changing the topology of the system. There are two nodes when it is disconnected and one node when it is closed. This model can reduce the calculation time under certain conditions; The sudden change of the inductor current, but the circuit model is complex and the simulation time is long; the variable resistor model uses a large resistor model when it is disconnected, and a small resistor model when it is closed

These models regard the switch as a separate component, so a switch model contains two nodes, but there are often a large number of switching components in the actual system, which results in a large dimension of the system admittance matrix during simulation, which consumes a lot of time. makes the simulation too slow

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