Line protection experiment platform based on model design

Abstract

The invention describes a line protection experiment platform based on model design, the experiment platform comprises a software platform and a hardware platform, the software platform is an upper computer composed of a computer, MATLAB software and CCS software, and the hardware platform comprises a DSP control panel, a voltage and current transformer measurement unit and a simulation unit (linemodel). And the software platform builds a microcomputer protection model for simulation verification. The line model simulates an actual power transmission line, and the measurement unit collects afault signal generated by the power transmission line model. And the DSP control unit controls the switch-off and switch-on of the circuit breaker. Students can study protection action behaviors occurring under different faults, and the simulation effect is good. A line model is adopted to replace an actual power transmission line, simulation safety performance is high, and cost is low.

Description

technical field [0001] The invention relates to the teaching field of semi-physical simulation experiments of electric power system relay protection. Using the simulation platform can truly and efficiently simulate the running state of the line and the action of the relay protection, so that the user can master the principle of relay protection, and at the same time reduce the safety hazards of the experiment. Background technique [0002] Traditional protection experiments focus on relay characteristic testing, so that the specific role of the relay in the entire protection system cannot be understood during the experiment. The experimental platform can only carry out relatively simple experimental operations, and cannot fully mobilize the subjective initiative of students in learning, and can no longer meet the requirements of curriculum development for experiments. [0003] The main problems currently existing: [0004] (1) The protection experiment is mainly a single v...

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Problems solved by technology

[0005] (2) Most of the traditional relay protection experimental equipment is divided into physical models whose hardware is scaled down according to the actual transmission line. The operation is fixed, intuitive and easy to use, but the operation is single, and it cannot provide a platform for cultivating students' hands-on ability and innovation ability;

[0006] (2) The experimental equipment is single, bulky and expensive, not suitable for large-scale promotion

[0007] (3) It is dangerous for students to connect to the power grid on site, and personal safety accidents are prone to occur;

[0008] (4) The circuit structure of the relay protection experiment platform in traditional schools is fixed, and the transmission parameters cannot be changed. Only a single experiment can be performed, and it is inconvenient to expand various protection experiments

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