Electromagnetic transient rapid simulation method based on static var compensator

Abstract

The invention discloses an electromagnetic transient rapid simulation method based on a static var compensator. The method comprises the following steps: step 1, acquiring basic parameters of an SVC device; wherein parameters needing to be acquired comprise an inductor L of a TCR branch, a capacitor Cs of a fixed capacitor FC, a resistor Rf of a filter, an inductor Lf, a capacitor Cf, external input voltages uA, uB and uC and a thyristor trigger angle alfa. By introducing sine auxiliary variables, a state equation of SVC is converted into a homogeneous linear differential equation set from a non-homogeneous linear differential equation set. The solution of the equation set is rapidly obtained through a matrix index integration method, and meanwhile, the state equations are unified in formunder all working conditions. Compared with a system model required to be solved in traditional electromagnetic transient calculation, the method has the advantages that the system model required to be solved is changed only when the on-off states of the thyristors are changed, so that calculation is more efficient, and working efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of electrical simulation, in particular to an electromagnetic transient fast simulation method based on a static var compensator. Background technique [0002] Static Var Compensator SVC (Static Var Compensator) is a power electronic device, often composed of a thyristor-controlled reactor TCR (Thyristor Controlled Reactor) and a fixed capacitor FC (Fixed Capacitor). When the power system fails, by quickly adjusting the firing angle of the TCR in the SVC device, the reactive power output by the SVC to the power system can be quickly and smoothly adjusted to achieve the purpose of regulating the voltage of the power system. With the improvement of the performance of power electronic devices and the reduction of the cost, the application of SVC in the power system is becoming more and more common. [0003] Time-domain simulation is an important means to study the operating characteristics of power systems. El...

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Problems solved by technology

For power electronic equipment, the electromechanical transient simulation ignores the dynamic process inside the equipment, adopts the quasi-steady-state modeling method, and only considers the operation and control characteristics of the equipment under the positive sequence fundamental frequency. The influence of internal control methods of equipment on the operation of large power grids has great limitations; electromagnetic transient simulation performs three-phase modeling of power electronic equipment at the precise circuit level, which has the advantages of accurate calculation and high reliability, but The calculation step is small and the calculation speed is slow

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