Electronic power switch interpolation real-time simulation method

Abstract

The invention discloses an electronic power switch interpolation real-time simulation method based on backward euler-trapezoidal weighted integral method. The electronic power switch interpolation real-time simulation method comprises the steps that at the turn-off time of an electronic power switch, linear interpolation is adopted for determining the accurate switch action time point and relevant state variables; according to the position of the switch action time point in the single-step simulation step size, an ordinary differential equation backward euler-trapezoidal weighted integral method is utilized for building a piecewise function, and the numerical solution of the system whole-step stimulation time point is obtained through integration, wherein in the process, all amounts of the system are reinitialized, and therefore the accurate network topology and system initial value at the time moment are obtained. A traditional problem that the electromagnetic transient stimulation efficiency is affected due to the fact that system topology high frequency changes are caused when the electronic power switch frequently acts during power system electromagnetic transient simulation is effectively solved.

Description

technical field [0001] The invention relates to a power system, in particular to a power electronic switch interpolation real-time simulation method for the power system. Background technique [0002] my country's energy distribution and regional development are extremely unbalanced, so it is necessary to build a series of long-distance power transmission projects such as west-to-east power transmission. In order to solve the problems of low power transmission efficiency and unstable new energy access, my country's power grid has widely introduced new technologies such as high-voltage DC transmission, flexible AC transmission, and distributed power generation technology, including a large number of FACTS, Rectification and inverter devices, reactive power compensation devices (SVC, STATCOM) and other devices, power network operation control is becoming increasingly complex. The development trend of the modern power system is cross-regional networked operation. Except for a f...

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Problems solved by technology

[0008] 2) Simultaneous action of multiple switches in the same step length makes simulation difficult to detect and calculate;

[0009] 3) The forced commutation device simulation state variable mutation problem;

[0010] 4) Fast and high-precision resynchronization of simulation and full-step time points

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