RED670 1MRK000028-CAR01 电流互感器的特性与变比均应相同

Description

RED670 1MRK000028-CAR01 电流互感器的特性与变比均应相同

母线差动保护是用于保护母线的一种重要保护装置，RED670 1MRK000028-CAR01 主要应用于电力系统中的母线故障检测和切除。它的工作原理主要是基于比较电流是否平衡或者相位是否一致来实现故障判断的。

在正常工作情况下，RED670 1MRK000028-CAR01 流入母线的电流和等于从该节点流出的电流，即母线差动保护的差动电流为零。如果母线发生故障，差动电流将大于零，母线差动保护将会动作切除故障。

母线差动保护有多种实现方式，其中最常用的是完全差动保护和不完全差动保护。完全差动保护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，电流互感器的特性与变比均应相同，以满足ΣI=0的条件。不完全差动保护只需将连接于母线的各有电源元件上的电流互感器，接入差动回路，在无电源元件上的电流互感器不接入差动回路。

在实际应用中，RED670 1MRK000028-CAR01 母线差动保护的特性会受到多种因素的影响，如电流互感器的特性、变比、二次回路的断线等。为了提高母线差动保护的可靠性和选择性，可以采用速饱和变流器、躲开外部短路时产生的不平衡电流、躲开最大负荷支路的最大负荷电流等措施。

总之，RED670 1MRK000028-CAR01 母线差动保护是保障电力系统安全稳定运行的重要设备之一，具有高可靠性、快速性和选择性等优点。

RED670 1MRK000028-CAR01 电流互感器的特性与变比均应相同

Bus differential protection is an important protection device used to protect the bus, RED670 1MRK000028-CAR01 is mainly used in the power system of the bus fault detection and removal. Its working principle is mainly based on comparing whether the current is balanced or whether the phase is consistent to achieve fault judgment.

Under normal working conditions, the current flowing into the bus of RED670 1MRK000028-CAR01 is equal to the current flowing out of the node, that is, the differential current of the differential protection of the bus is zero. If the busbar fails, the differential current will be greater than zero, and the busbar differential protection will act to remove the fault.

There are many ways to implement busbar differential protection, the most common of which are complete differential protection and incomplete differential protection. Complete differential protection connects the current transformers of all connected components on the bus to the differential circuit according to the same phase and polarity, and the characteristics and ratio of the current transformer should be the same to meet the condition of ΣI=0. Incomplete differential protection only needs to connect the current transformer connected to the bus on each power component to the differential circuit, and the current transformer on the non-power component does not connect to the differential circuit.

In practical applications, the characteristics of RED670 1MRK000028-CAR01 bus differential protection will be affected by a variety of factors, such as the characteristics of the current transformer, the ratio, the break of the secondary circuit, etc. In order to improve the reliability and selectivity of busbar differential protection, the speed saturation converter can be used to avoid the unbalanced current caused by external short circuit and the maximum load current of the maximum load branch.

In short, RED670 1MRK000028-CAR01 bus differential protection is one of the important equipment to ensure the safe and stable operation of the power system, with high reliability, speed and selectivity.