A system for virtual experiment of current relay characteristics and its realization method

Abstract

The invention discloses a system for virtual experiment of current relay characteristics and its realization method. The system comprises: a device virtual module, which simulates and generates virtual elements corresponding to each physical element according to the schematic diagram of the current relay characteristic experiment, and provides a reference for the virtual circuit. The setting of the parameters of each virtual component; the adjustment module is used to adjust the virtual current of the virtual circuit or the parameter value of the relay, and the start condition is reached; the processing module monitors the trigger condition of the virtual current to record the current action value and return value; Obtain the current current of the virtual circuit and present it; the condition fulfillment processing module monitors whether the trigger condition of the virtual current is fulfilled, judges that the current of the virtual circuit reaches the action value or return value, triggers the recording module, and at the same time executes the external performance of the real current relay action or return ; The recording module is used to record the action / return current value during the experiment and analyze the experimental data.

Description

technical field [0001] The invention relates to the technical field of electrical control and relay protection, in particular to a system for virtual experiment of current relay characteristics and a realization method thereof. Background technique [0002] When a fault or abnormal operation occurs in the power system, the normal operation of the system is destroyed, resulting in the power supply to users being stopped or reduced, and sometimes even the equipment is destroyed. In order to prevent accidents or reduce the scope of accidents, improve the reliability of power system operation, and ensure the safe and continuous supply of power to users to the greatest extent, there must be special relay protection devices in the power system. [0003] The relay protection device must be able to correctly distinguish whether the protected element is in a normal operation or a fault state. To achieve this function, the protection device needs to be constructed based on the charact...

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Problems solved by technology

[0005] However, it is necessary to change the return coefficient when using the actual current relay for the characteristic experiment, and it is difficult to adjust the position of the tongue limiting screw, spring force, contact pressure, etc. of the actual relay, and frequent adjustments to the actual mechanism will easily reduce the accuracy of the equipment or even damage the equipment ; Moreover, the physical experiment of the characteristics of the current relay involves mains power and 220V DC, and measures need to be taken during the experiment to ensure the safety of the experimenters, and the physical experiment is not suitable for remote operation

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