本文简要叙述了一种新颖继电保护方案的研制。煤矿电力系统在绝缘恶化、接地故障和电弧击穿时,根据检测谐波含量而提出一种新的保护概念。当绝缘恶化时,通过间隙放电(电晕放电和微弱电弧)产生一个很小的谐波丰富的初期电流,这个电流引起绝缘材料发生一种化学变化,产生的物质具有很大的非线性电阻,这个非线性电阻也就产生了谐波。此 This article briefly describes a novel relay protection program. Coal mine power system in insulation deterioration, ground fault and arc breakdown, according to the detection of harmonic content and proposed a new concept of protection. When insulation deteriorates, a small, harmonic-rich initial current is generated through the gap discharge (corona discharge and weak arc) which causes a chemical change in the insulation material to produce a material with a large non-linear resistance, This nonlinear resistor also produces harmonics. this