Relay protection device and system, realizing plug-and-play, of transformer station

Abstract

The invention discloses relay protection device and system, realizing plug-and-play, of a transformer station. The protection device comprises a line protector, a transformer protector, a bus connection protector and a bus separation protector relying on one another and associated with one another; required current and switching amount information are connected to the line protector, the transformer protector and the bus connection protector directly via secondary cables; opening / closing control is output directly via the secondary cables, and the protectors directly act on a switching mechanism of a bay level; the bus voltage collected by a voltage transformer is connected to the bus separator protector in the analog form; and the bus separator protector is directly connected to the line protector, the transformer protector and the bus connection protector via two optical cables in a point-to-point manner. On the premise that faults of the electric network can be overcome rapidly, the relay protection device system of the invention can further reduce the operation risk of the electrical network as well as the labor intensity of maintenance staff, and it is ensured that the electrical network operates safely, reliably and stably.

Description

technical field [0001] The invention relates to the technical field of intelligent substations, in particular to a substation relay protection device and system for realizing plug-and-play. Background technique [0002] Conventional stations have high reliability, mature technology, and stable operation, but there are problems such as complex circuits, poor versatility of protection devices and secondary circuits, high technical requirements, difficult rectification and countermeasures, and heavy operation and maintenance workload. For this reason, smart grids emerged as the times require . The smart grid uses a high-speed network communication platform as the basis for information transmission, and automatically completes functions such as information collection, measurement, control, protection, measurement, and detection. Smart substations have three key features. One is to realize the conversion between analog electrical signals and digital optical signals by adding pro...

AI Technical Summary

Problems solved by technology

[0004] One is to use optical fiber to transmit information between the process layer and the interval layer. The length of the optical fiber is long and it is prone to failure;

[0005] The second is to increase the merging unit and intelligent terminal equipment at the process layer to realize the conversion of photoelectric signals, the collection of voltage, current and switch state information, and the transmission of opening and closing signals. The merging unit (MU) and the intelligent terminal (ST) Equipment products are of poor quality and often break down;

[0006] The third is that the information transmission between the process layer and the interval layer depends on the network, and the existing technical level of the operation and maintenance personnel is difficult to meet the application requirements of the new communication technology, and the debugging and elimination rely too much on the manufacturer, and there is a big risk in safe operation

In order to ensure the reliability of data transmission at each interval, the process layer switch needs to use 802.1Q VLAN (Virtual Local Area Network) or GMRP (Multicast Registration Protocol) for multicast management, and the input or output ports need to be suppressed to avoid network storms. At the same time, port mirroring is required to realize real-time monitoring of data frames. However, the existing network communication technology level of operation and maintenance personnel is relatively weak, and the equipment debugging is overly dependent on the manufacturer, and there is a large risk in safe operation.

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