摘要
如何鉴别励磁涌流和故障电流是变压器保护装置正确动作的关键因素。在牵引变压器低压侧装有补偿电容器的情况下发生故障,二次谐波制动原理不能识别故障电流,导致保护拒动。在牵引变压器保护配置双重化的前提下,本文选择波形对称原理来弥补该原理的不足。为验证本文选择的两种保护原理的互补性,根据RTDS的闭环测试功能对保护装置进行仿真测试,测试结果表明本文提出的两种保护原理可实现互补。
The key to the correct action of the traction transformer protection device is to distinguish excitation flow and fault current. The principle of second harmonic braking is that the principle of compensating capacitor on the low voltage side of the traction transformer is easy to protect against the failure. According to the requirement of the protection config- uration of the traction transformer, this paper selects the waveform symmetry principle to compensate for the defects and double the protection. Can be used to verify the results of this paper choose two kinds of protection of the principle of complementarity,based on the closed-loop test function of RTDS for protection device simulation test, the test results show that the proposed two kinds of protection which can realize the complementary principle.
出处
《电气开关》
2018年第1期40-41,44,共3页
Electric Switchgear
关键词
二次谐波制动
波形对称原理
实时数字仿真
闭环测试
second harmonic braking
the principle of waveform symmetry
real-time digital simulation
closed-loop test
