PSCAD (power system computer aided design) model of superconductive current-limiting reactor

Abstract

The invention discloses a PSCAD (power system computer aided design) model of a superconductive current-limiting reactor. The PSCAD model is characterized in that the PSCAD model is composed of a three-winding transformer model umec (1), a current sensor (2), a resistor A (3), an IGBT (insulated gate bipolar translator)-2 (5), a resistor B (6) and a direct-current source (8) which are sequentially connected; the resistor A (3) is in series connection with an IGBT-1 (4), and an IGBT-2 (5) is in series connection with a capacitor (7); the three-winding transformer model umec (1) is composed of two serially-connected iron cores and a direct-current excitation system; two alternating-current coils are wound on the two iron cores in series connection, and serially-connected alternating-current windings are serially connected to a power transmission system; direct-current magnetized superconductive windings are wound on center posts of the iron cores. The PSCAD model is high in accuracy, high in simulation velocity, strong in measuring ability, real-time and visual; compared with simulation software ANSYS, the PSCAD model, based on an SPWM (sinusoidal pulse width modulation)-controlled direct-current chopping control circuit of a saturated-iron-core type superconductive current-limiting reactor has the advantages of simplicity and high calculation speed.

Description

technical field [0001] The invention belongs to the superconducting current-limiting reactor device in the application field of superconducting technology, in particular to a saturated iron-core type superconducting current-limiting reactor PSCAD model based on SPWM control DC chopping control circuit, which is a controllable high-temperature superconducting winding and Modeling and simulation of umec. In this way, the working characteristics of the superconducting current-limiting reactor can be accurately simulated in PSCAD, which helps us to study the working principle of the superconducting current-limiting reactor and its influence on the electromechanical protection of the power system. Background technique [0002] At present, the scale of the power grid is expanding day by day, the degree of interconnection is increasing, and the short-circuit current is also increasing. The existing relay protection measures are facing bottlenecks. Conventional current limiters affe...

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Problems solved by technology

[0005] The current superconducting current-limiting reactor model has the disadvantages of slow calculation speed, complex structure and low accuracy.

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