Dynamic analog device for graded controllable parallel reactors and test method thereof

Abstract

The invention provides a method using a dynamic analog device for ultrahigh-voltage transformer type graded controllable parallel reactors, which is designed to accurately simulate a dynamic analog device for transformer type graded controllable parallel reactors with different capacities in 500 kV, 750 kV and 1000 kV power transmission systems. The primary side of the analog device body is in a single-phase discrete type, and three phases are connected to form a Y shape; and a primary winding is provided with 12 turn-to-turn fault taps which can respectively simulate 1-25% of turn-to-turn faults from the high-voltage side to the neutral point side. The secondary side of the analog device body is in a single-phase closed connection way, and the tail end is directly grounded. The capacities are divided into 9 grades: 100%, 75%, 62.5%, 56.25%, 46.875%, 37.5%, 31.25%, 18.75% and 15.625%. The primary side and the secondary side of the analog device body are respectively provided with a current transformer and a voltage transformer, thereby being capable of satisfying the demands for reactor body protection in a dynamic analog test. Aiming at the body protection on the ultrahigh-voltage controllable parallel reactors and the line protection on installation of the controllable parallel reactors, the invention provides a dynamic analog test method.

Description

technical field [0001] The invention relates to a dynamic simulation device and a method for super- and extra-high voltage transformer-type graded controllable shunt reactors, and belongs to the field of dynamic simulation systems for power systems of various voltage levels. Background technique [0002] The controllable shunt reactor can automatically adjust its own capacity with the change of transmission power of the line, and can reduce the overvoltage level of the line operation and improve the operating efficiency of the power grid; respond quickly to the dynamic stability caused by the system disturbance, suppress voltage fluctuations, and improve System stability, increase power transmission capacity, and suppress system power oscillation. The application of controllable shunt reactors in EHV and UHV transmission systems has become one of the development directions of power systems. The Dynamic Model Laboratory of the State Grid Simulation Center, in order to furthe...

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Problems solved by technology

[0004] Patent 200620132038.5 is a fixed-capacity shunt reactor simulation device. Once its capacity is set, it cannot be changed during operation. This device cannot be used for the protection of the controllable shunt reactor device body and the line protection with a controllable shunt reactor device. inspection and testing work

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