基于实时数字仿真器的变压器保护装置研究

Study on Transformer Protection Devices Based on RTDS

变压器保护装置作为电力变压器的主保护和后备保护,在电力系统中已得到广泛应用,但目前变压器保护装置在接入电网前经过了继电保护测试仪的简单测试,缺乏接入模拟电网的调试,因此无法确保设备性能满足实际要求。研究利用实时数字仿真器(RTDS)准确模拟电力系统发生故障的过程,建立模拟电网,针对变压器保护装置的测试,对变压器保护装置的原理进行了分析,在RTDS平台上设计了供电系统模拟系统和对应控制回路,在模拟电网系统中通过设置各种异常工况模拟常见电网故障情况。

Transformer protection device,as the main protection and backup protection of power transformer,has been widely used in power system,but at present,transformer protection device has passed the simple test of relay protection tester before its access to power grid,lack of access to the simulation of the power grid; therefore,it is impossible to ensure that the device performance meets actual requirements. This paper studies the use of Real Time Digital Simulation（ RTDS） to accurately simulate the failure process of the power system,establishes a simulation grid,and implements a test system for the transformer protection device in the event of a simulated power grid failure.It is of great significance to test the transformer protection devices. This paper analyzes the principle of transformer protection device in the test of transformer protection device. The simulation power system and the control loop are designed on RTDS platform. In the simulation grid system,various abnormal conditions are simulated to simulate common grid fault conditions.