Drainage control system for substation cable layer

Abstract

The invention provides a drainage control system for a substation cable layer. The drainage control system mainly consists of a water level sensor, a control box and a drainage water pump, wherein the water level sensor is placed in the substation cable layer, can convert a water level signal into an electric signal and can be accessed to an MCU (microprogrammed control unit) processor in the control box through an AD (analog-to-digital) sampling circuit; the control box mainly consists of the MCU processor, a man-machine interface and a water pump control relay which composed of a relay contact point and an AC (alternating current) contactor; the MCU processor is connected with a man-machine interface which can set water level alarm and action fixed values, and is connected with the control relay which is connected with an automatic monitoring system and is mainly used for realizing the automatic water level alarm and control on the turn-on of the drainage water pump; and the drainage water pump is connected with the AC contactor of the control relay in series and can be used for connecting the water pump power supply and starting the water pump drainage when the control box determines the water level exceeding a drainage set value. The drainage control system provided by the invention has the characteristics of clever design, reasonable structure, convenience and reliability in use, interface and modular design, capability of greatly promoting the electric power safety production and the like.

Description

technical field [0001] The invention relates to a substation cable layer water well, an intelligent drainage system including a cable layer and a cable trench, which is mainly used for substation cable layers and cable trenches where drainage wells are provided and need to prevent flooding, so as to realize automatic alarm of water level , Automatic start of drainage and automatic sending of alarm text messages and other functions to meet the needs of the development of electric power automation and promote the safe operation of cables and power plants. Background technique [0002] The cables in the cable layer of the substation are criss-crossed, and a large number of primary high-voltage transmission cables responsible for power supply and secondary cables for transmitting control and signals are concentrated here. On the one hand, cables have extremely high requirements for waterproof and moisture-proof, etc. Moisture or flooded cables will cause mildew and aging of cabl...

AI Technical Summary

Problems solved by technology

[0003] 1. In the power system substation, the cable layer and cable trench are generally lower than the ground level in the station. Although the cable layer is generally equipped with water wells, it is very likely that water will accumulate in rainy or snowy days.

[0004] 2. There is plenty of rain in the south, especially during the rainy season in spring and summer, when the rainy season is long and the amount of rain is large, the cable layer and cable trench are prone to waterlogging; while the spring snowmelt in the north will also produce a large amount of melted water, causing the cable layer to accumulate water

[0005] 3. If there is a lot of water in the inner cable layer and cable trench, the cable will be insulated, which will seriously threaten the safety of the cable, and affect the system communication, primary and secondary circuits, etc., directly threatening the safe operation of the system

[0006] 4. It is not compatible with the current rapid development of substation automation technology

At present, the automation level of substations has developed very high. Electronic fences, fire alarms, and even wall vibration signals have been connected to the monitoring automation system. However, the water accumulation and flooding of cable layers and cable trenches have long been in the blind spot of monitoring.

[0007] 5. At present, the water accumulation in the cable layer and cable trench can only be discovered by the inspection of the security guards or operating personnel in the station, and there may even be cases where water accumulation occurs for a long time but no one knows

[0008] It can be seen that the accumulation of water in the cable layer of the substation, and even the flood is currently in the blind area of ​​monitoring, which seriously threatens the safe production of the power system and seriously lags behind the growing substation automation technology.

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