CN202267585U - Detecting and monitoring system for water leakage in converter station - Google Patents

Abstract

The utility model discloses a water leakage detection and monitoring system in a converter station, which includes a monitoring host, a PLC controller in a main control building, and a PLC controller in an auxiliary control building. System, the PLC controller of the main control building and the PLC controller of the auxiliary control building communicate through the communication optical cable. The PLC controller of the main control building and the PLC controller of the auxiliary control building include CPU, communication module and I/O module. The PLC controller of the control building is connected with the field sensor signal in the main control building to carry out the information input and alarm output of each field sensor, and the PLC controller of the auxiliary control building is connected with the field sensor signal in the auxiliary control building to carry out the information of each field sensor input and alarm output. The utility model is easy to operate, stable and reliable, can strengthen the on-line detection level of water leakage or water level at key parts in the converter station, and ensure the safe and stable operation of the equipment in the station.

Description

Water Leakage Detection and Monitoring System in Converter Station

technical field

The utility model relates to the technical field of water leakage detection and monitoring equipment, in particular to a water leakage detection and monitoring system in a converter station.

Background technique

In the conventional converter station, there have been accidents such as the leakage of the shaft seal of the main pump of the internal cooling water system, which caused the DC system to stop suddenly, and the rainwater poured into the cable trench, causing the industrial water room, external cooling water room, and fire pump room to be flooded. In order to avoid similar accidents, it is necessary to strengthen the online detection level of water leakage or water level in key parts of the station to ensure the safe and stable operation of equipment in the station.

Utility model content

The purpose of the utility model is to provide an easy-to-operate, stable and reliable water leakage detection and monitoring system in the converter station, which can strengthen the online detection level of water leakage or water level at key parts in the converter station, and ensure the safe and stable operation of the equipment in the station.

The utility model is realized through the following technical solutions: a water leakage detection and monitoring system in a converter station, including a monitoring host, a PLC controller for the main control building, a PLC controller for the auxiliary control building, a PLC controller for the main control building, and an auxiliary control building The PLC controllers all include CPU, communication module and I/O module. The monitoring host and the PLC controller of the main control building are connected to form an Ethernet system through a shielded network cable. The PLC controller of the main control building and the PLC controller of the auxiliary control building The PLC controller in the main control building is also connected with the field sensor signals in the main control building to perform information input and alarm output of each field sensor. The PLC controller in the auxiliary control building communicates with the field sensors in the auxiliary control building. Signal connection for information input and alarm output of each field sensor.

The on-site sensors in the main control building include the remote sensor of the shaft seal micro-leakage detection point of the internal cooling water main pump and the remote sensor of the cable trench water level monitoring point; the on-site sensors in the auxiliary control building include the internal cooling water main pump The remote sensor of the pump shaft seal trace leakage detection point, the remote sensor of the water level alarm monitoring point of the flooded pump room, the remote sensor of the cable trench water level monitoring point, and the temperature and humidity sensor of the temperature and humidity monitoring point of the cable interlayer in the relay room, The pump room includes an external cooling water room, a comprehensive pump room and a fire pump room.

The on-site sensors in the main control building also include the remote sensor at the water level alarm monitoring point of the flooded pump house, the temperature and humidity sensor at the temperature and humidity monitoring point of the cable interlayer in the relay room, the temperature and humidity sensor at the outdoor temperature and humidity monitoring point of the DC field, and the high temperature sensor. 1. The temperature and humidity sensor of the temperature and humidity monitoring point in the box of the low-end converter inverter, and the pump room includes an external cooling water room, a comprehensive pump room and a fire pump room.

The on-site sensors in the auxiliary control building also include temperature and humidity sensors at the outdoor temperature and humidity monitoring points of the DC field and temperature and humidity sensors at the temperature and humidity monitoring points in the boxes of the high-end and low-side converter inverters.

The PLC controller of the main control building or the PLC controller of the auxiliary control building also obtains the monitoring signals of the main pump and water level of the cable ditch sump in front of the converter station through the signal line and field sensors.

The beneficial effects of the utility model are: through the technical solution described in the utility model, all monitoring points can be included and a visual interface can be formed, and it has functions such as cable trench water level alarm, main pump water leakage alarm, and temperature and humidity value timely display. The sound and light alarm reminds the operator to find and deal with abnormalities early. The lower control layer of the control system uses a PLC controller to perform functions such as information input and alarm output of remote sensors on site. The connection between the monitoring host and the lower control layer is through a network cable. It is connected to the most common Ethernet system, and the PLC controllers communicate through the communication optical cable, so that the key parts of the whole station that may cause DC outage accidents due to water ingress or seepage can be incorporated into a system, and through reliable remote control Terminal sensors, mature PLC control software, humanized operation interface, etc. form an early warning mechanism to remind staff to find problems in time and prevent accidents before they happen.

Description of drawings

Fig. 1 is a schematic diagram of a water leakage detection and monitoring system in a converter station of the present invention.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in detail.

As shown in Figure 1, the water leakage detection and monitoring system in the converter station of the utility model includes a monitoring host, a PLC controller in the main control building, and a PLC controller in the auxiliary control building. The shielded network cable is used between the monitoring host and the PLC controller in the main control building Connected into an Ethernet system, the PLC controller of the main control building and the PLC controller of the auxiliary control building communicate through the communication cable. The PLC controller of the main control building and the PLC controller of the auxiliary control building include CPU, communication module and I/O O module, the PLC controller in the main control building is connected with the field sensor signals in the main control building to perform information input and alarm output of each field sensor, and the PLC controller in the auxiliary control building is connected with the field sensor signals in the auxiliary control building to perform various Information input and alarm output of field sensors. Figure 1 takes a main control building and two auxiliary control buildings as an example, one of the two auxiliary control buildings is the PLC controller of the pole 1 auxiliary control building, and the other is the PLC controller of the pole 2 auxiliary control building. The PLC controller in the main control building uses the corresponding on-site sensors to detect water leakage in the cable trench, detect the temperature and humidity in the room of the low-end valve group of pole 2, detect the room temperature and humidity of the relay, detect the slight water leakage in the shaft seal pump room of the main control building, detect pole 1 and pole 2 Water level detection of each pump room, pole 1 high-end valve group cable ditch sump sewage pump operation signal and super high water level alarm signal detection, pole 2 high-end valve group cable ditch sump sewage pump operation signal and super high water level alarm signal detection and main control Acquisition of inverter feeder circuit information in the building; the PLC controller of the pole 1 auxiliary control building conducts cable trench water leakage detection, relay temperature and humidity detection through the corresponding on-site sensors, pole 1 auxiliary control building shaft seal pump room trace water leakage detection, and pole 1 high-end valve The water level detection of the flooded pump room in the external cold room of the valve group and the operation signal and ultra-high water level alarm signal detection of the pole 1 high-end valve group cable ditch puddle sewage pump and the acquisition of the inverter feeder circuit information of the pole 1 auxiliary control building; the pole 2 auxiliary control The PLC controller of the building uses the corresponding on-site sensors to detect the indoor and outdoor temperature and humidity of the pole 2 high-end valve group, as well as the temperature and humidity detection of the relay, the detection of micro-leakage of the shaft seal pump room of the pole 2 auxiliary control building, and the cold room outside the valve of the pole 2 high-end valve group Water level detection of flooded pump room, detection of operation signal and ultra-high water level alarm signal of pole 2 high-end valve group cable ditch puddle sewage pump, and information acquisition of inverter feeder circuit of pole 2 auxiliary control building.

From the above, it can be seen that the water leakage detection and monitoring system described in the present invention includes signal cable laying, sensor probe installation, PLC host computer configuration, software interface development and so on.

The following is a more detailed description: the water leakage detection and monitoring system collects the water level (trace leakage) sensing signal of the key parts in the converter station, that is, it mainly includes: ① 8 detection points for the shaft seal trace leakage of the internal cooling water main pump, and the sensor adopts the optical principle; ② 10 water level alarm monitoring points in flooded pump rooms (4 points in total in 4 external cold water rooms, 4 points in a comprehensive pump room, 2 points in a fire pump room), the sensor adopts liquid level detection switch sensor (nitrile rubber float ); ③ 4 temperature and humidity monitoring points on the cable interlayer in the relay protection room (2 on the bottom of each relay protection room), 2 temperature and humidity monitoring points in the BOX-IN (one high and low end converter transformer each), the sensor adopts Indoor temperature and humidity sensor; ④1 outdoor temperature and humidity monitoring point of the DC field, and the sensor uses an outdoor temperature and humidity sensor; ⑤The sensor uses 7 important cable trench water level monitoring points, and the sensor uses a liquid level detection switch sensor (nitrile rubber float); ⑥4 The main pump and water level monitoring signal of the cable ditch sump before the rheological conversion are transmitted remotely by the on-site sensor, and the water level monitoring sensor adopts the liquid level detection switch sensor (nitrile rubber float).

The management operation layer of the monitoring host of the utility model adopts man-machine monitoring automation technology, and collects all monitoring points and forms a visual interface through the industrial computer (that is, the monitoring host) Windows XP operating system and Intouch10.1 configuration software, and has a cable ditch water level Functions such as alarm, water leakage alarm of the main pump, timely display of temperature and humidity values, etc., provide help for operators to find and deal with abnormalities early through sound and light alarm reminders; the lower control layer of the control system adopts PLC controllers, mainly composed of CPU, communication modules and I/ O module is composed of information input and alarm output of remote sensors on site. The upper and lower control layers are connected through network cables to form the most common Ethernet system, and PLCs communicate through communication optical cables. The water leakage detection and monitoring system described in the utility model incorporates the key parts of the whole station that may cause DC outage accidents due to water ingress or seepage into a set of systems, through reliable remote sensors, mature PLC control software, humanized operation The interface forms an early warning mechanism to remind the operation and maintenance personnel to find problems in time and prevent problems before they happen to avoid accidents. At the same time, sufficient A/D sensor channels are reserved in the entire monitoring platform to reserve sufficient margin for future system expansion.

Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the scope of protection of the utility model. Simple modifications or equivalent replacements to the technical solution of the utility model by those skilled in the art are all acceptable. Do not depart from the essence and scope of the technical solution of the utility model.

Claims (5)

1. the detection surveillance of leaking in the current conversion station; It is characterized in that: leaking in the said current conversion station detected surveillance and comprised monitoring host computer, master control building PLC controller, auxilliary control building PLC controller; Master control building PLC controller, auxilliary control building PLC controller have included CPU, communication module and I/O module; Connect into Ethernet system through shielding netting wire between monitoring host computer and the master control building PLC controller; Carry out communication through communication cable between master control building PLC controller and the auxilliary control building PLC controller, master control building PLC controller also with the master control building in the spot sensor signal is connected, carry out the information input of each spot sensor and report to the police and export; Auxilliary control building PLC controller is connected with the auxilliary spot sensor signal of controlling in the building, carries out the information input of each spot sensor and the output of reporting to the police.

2. the detection surveillance of leaking in the current conversion station according to claim 1 is characterized in that: the spot sensor in the said master control building comprises that the inner cold water main pump shaft seals the distal sensor of the distal sensor of micro-leak detection point, cable duct water level monitoring point; Spot sensor in the said auxilliary control building includes the inner cold water main pump shaft and seals the distal sensor of the distal sensor of the distal sensor of micro-leak detection point, water logging pump house water-level alarm monitoring point, cable duct water level monitoring point and continue and protect the Temperature Humidity Sensor of cable interlayer humiture monitoring point, chamber, and said pump house comprises external cooling boiled water room, comprehensive pump house and fire pump room.

3. the detection surveillance of leaking in the current conversion station according to claim 2; It is characterized in that: the spot sensor in the said master control building also comprises the continue Temperature Humidity Sensor of humiture monitoring point in the box of Temperature Humidity Sensor and high and low end change of current inverter of the Temperature Humidity Sensor of protecting cable interlayer humiture monitoring point, chamber, the outdoor humiture of dc fields monitoring point of the distal sensor of water logging pump house water-level alarm monitoring point, and said pump house comprises external cooling boiled water room, comprehensive pump house and fire pump room.

4. the detection surveillance of leaking in the current conversion station according to claim 2 is characterized in that: the spot sensor said auxilliary control building in also includes the Temperature Humidity Sensor of the interior humiture monitoring point of box of Temperature Humidity Sensor and the high and low end change of current inverter of the outdoor humiture of dc fields monitoring point.

5. according to the detection surveillance of leaking in claim 2 or the 3 or 4 described current conversion stations, it is characterized in that: said master control building PLC controller or auxilliary control building PLC controller also obtain the pilot signal of cable duct catch pit main pump and water level before the current conversion station through signal wire and spot sensor.