描述

RED670 電流互感器用于測(cè)量線路兩端的電流值

線路差動(dòng)保護(hù)是電力系統(tǒng)中一種重要的保護(hù)裝置，RED670用于檢測(cè)線路上的相間故障和其他異常條件。它的基本原理是通過(guò)比較線路兩端的電流來(lái)實(shí)現(xiàn)對(duì)線路狀態(tài)的監(jiān)測(cè)和保護(hù)。當(dāng)線路發(fā)生故障時(shí)，故障電流會(huì)流過(guò)線路兩端，此時(shí)差動(dòng)保護(hù)裝置會(huì)比較兩端電流的差值，如果差值超過(guò)一定范圍，就會(huì)判斷為線路故障，并觸發(fā)保護(hù)動(dòng)作，例如跳閘等，從而隔離故障部分，保證電力系統(tǒng)的安全穩(wěn)定運(yùn)行。

在實(shí)際應(yīng)用中，RED670線路差動(dòng)保護(hù)裝置通常由差動(dòng)繼電器、電流互感器和電壓互感器組成。電流互感器用于測(cè)量線路兩端的電流值，電壓互感器則用于測(cè)量線路兩端的電壓值，差動(dòng)繼電器則負(fù)責(zé)將電流和電壓信號(hào)進(jìn)行差動(dòng)計(jì)算和比較。同時(shí)，為了提高差動(dòng)保護(hù)的可靠性和靈敏度，還可以采用一些輔助措施，例如采用速飽和變流器來(lái)防止由于區(qū)外故障一次電流中的直流分量導(dǎo)致電流互感器飽和引起的保護(hù)誤動(dòng)作。

此外，光纖電流差動(dòng)保護(hù)是線路差動(dòng)保護(hù)的一種重要形式，RED670采用光纖通道將線路兩端的電氣量信息傳輸?shù)綄?duì)端進(jìn)行比較，具有傳輸速度快、抗干擾能力強(qiáng)等優(yōu)點(diǎn)。在現(xiàn)代電力系統(tǒng)中，光纖電流差動(dòng)保護(hù)已經(jīng)成為主流的保護(hù)方式之一。

RED670 電流互感器用于測(cè)量線路兩端的電流值

Line differential protection is an important protection device in power system, RED670 is used to detect interphase faults and other abnormal conditions on the line. Its basic principle is to realize the monitoring and protection of the state of the line by comparing the current at both ends of the line. When the line fails, the fault current will flow through both ends of the line, at this time the differential protection device will compare the difference between the two ends of the current, if the difference exceeds a certain range, it will be judged as a line fault, and trigger the protection action, such as tripping, so as to isolate the fault part, to ensure the safe and stable operation of the power system.

In practical application, RED670 line differential protection device is usually composed of differential relay, current transformer and voltage transformer. The current transformer is used to measure the current value at both ends of the line, the voltage transformer is used to measure the voltage value at both ends of the line, and the differential relay is responsible for differential calculation and comparison of the current and voltage signals. At the same time, in order to improve the reliability and sensitivity of differential protection, some auxiliary measures can also be adopted, such as the use of speed saturation converter to prevent the protection error caused by the saturation of the current transformer due to the DC component of the fault primary current outside the area.

In addition, fiber optic current differential protection is an important form of line differential protection. RED670 uses fiber channel to transmit the electrical information at both ends of the line to the opposite end for comparison, which has the advantages of fast transmission speed and strong anti-interference ability. In modern power system, fiber optic current differential protection has become one of the mainstream protection methods.

 

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Company Introduction:
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



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