RED670 1MRK000028-CAR01  通过对比线路两端的电流量来判断被保护线路是否有故障

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 RED670 1MRK000028-CAR01  通过对比线路两端的电流量来判断被保护线路是否有故障

线路差动保护是一种继电保护装置， RED670 1MRK000028-CAR01基于基尔霍夫电流定理工作，通过比较被保护线路各端电流的大小和相位来判断线路是否有故障。

在正常运行情况下，进出被保护设备的电流大小相等，相位相同。如果设备发生故障，这一平衡就会被破坏。线路差动保护正是利用这一原理，通过对比线路两端的电流量来判断被保护线路是否有故障。

当设备出现故障时，流进被保护设备的电流和流出的电流不相等，差动电流大于零。当差动电流大于差动保护装置的整定值时，保护装置会动作，将被保护设备的各侧断路器跳开，使故障设备断开电源。

线路差动保护一般分为纵联差动保护和横联差动保护。纵联差动保护是按照比较被保护线路各端电流的大小和相位的原理来实现的。在输电线两侧装设性能和变比完全相同的电流互感器，其二次侧同极性端用导引线连接，取差动回路中的电流进行相位和幅值作为比较。

此外， RED670 1MRK000028-CAR01母线差动保护也是差动保护的一种，它将母线上所有的各连接元件的电流互感器按同名相、同极性连接到差动回路，通过比较流入和流出母线的电流来判断母线是否有故障。

总的来说， RED670 1MRK000028-CAR01线路差动保护是一种有效的电气保护方法，可以快速地检测并隔离故障，保证电力系统的稳定运行。

 RED670 1MRK000028-CAR01  通过对比线路两端的电流量来判断被保护线路是否有故障

Line differential protection is a relay protection device, RED670 1MRK000028-CAR01 based on Kirchhoff’s current theorem, by comparing the size and phase of the current at each end of the protected line to determine whether the line has a fault.

In normal operation, the current to and from the protected device is equal in magnitude and phase. If the equipment fails, this balance can be disrupted. Line differential protection is the use of this principle, by comparing the current flow at both ends of the line to determine whether the protected line has a fault.

When a device fails, the current flowing into and out of the protected device is not equal, and the differential current is greater than zero. When the differential current is greater than the setting value of the differential protection device, the protection device will act, and the circuit breakers on each side of the protected device will be switched off, so that the faulty device is disconnected from the power supply.

Line differential protection is generally divided into longitudinal differential protection and transverse differential protection. The longitudinal differential protection is realized according to the principle of comparing the magnitude and phase of the current at each end of the protected line. Current transformers with identical performance and ratio are installed on both sides of the transmission line, and the same polarity end of the secondary side is connected by a guide line.

In addition, RED670 1MRK000028-CAR01 bus differential protection is also a kind of differential protection, which connects all the current transformers of the connecting elements on the bus to the differential circuit by the same name and the same polarity, and determines whether the bus is faulty by comparing the current in and out of the bus.

In general, RED670 1MRK000028-CAR01 line differential protection is an effective electrical protection method, which can quickly detect and isolate faults to ensure the stable operation of the power system.