描述

?RED670?1MRK000028-CAR01? 通過對比線路兩端的電流量來判斷被保護線路是否有故障

線路差動保護是一種繼電保護裝置，?RED670?1MRK000028-CAR01基于基爾霍夫電流定理工作，通過比較被保護線路各端電流的大小和相位來判斷線路是否有故障。

在正常運行情況下，進出被保護設備的電流大小相等，相位相同。如果設備發(fā)生故障，這一平衡就會被破壞。線路差動保護正是利用這一原理，通過對比線路兩端的電流量來判斷被保護線路是否有故障。

當設備出現(xiàn)故障時，流進被保護設備的電流和流出的電流不相等，差動電流大于零。當差動電流大于差動保護裝置的整定值時，保護裝置會動作，將被保護設備的各側(cè)斷路器跳開，使故障設備斷開電源。

線路差動保護一般分為縱聯(lián)差動保護和橫聯(lián)差動保護。縱聯(lián)差動保護是按照比較被保護線路各端電流的大小和相位的原理來實現(xiàn)的。在輸電線兩側(cè)裝設性能和變比完全相同的電流互感器，其二次側(cè)同極性端用導引線連接，取差動回路中的電流進行相位和幅值作為比較。

此外，?RED670?1MRK000028-CAR01母線差動保護也是差動保護的一種，它將母線上所有的各連接元件的電流互感器按同名相、同極性連接到差動回路，通過比較流入和流出母線的電流來判斷母線是否有故障。

總的來說，?RED670?1MRK000028-CAR01線路差動保護是一種有效的電氣保護方法，可以快速地檢測并隔離故障，保證電力系統(tǒng)的穩(wěn)定運行。

?RED670?1MRK000028-CAR01? 通過對比線路兩端的電流量來判斷被保護線路是否有故障

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.

 

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Chengdu Sunshine Xihe Co., Ltd. specializes in one-stop procurement consulting for imported industrial spare parts, offering original equipment and professional discontinued parts services. We are committed to providing efficient and reliable automation solutions for our customers. Customer support fast responseThe network of partners spans all continentsGlobal partner networkAlways achieve more delivery, be it parts, service or speed



始終實現(xiàn)更多的交付，無論是零件、服務還是速度