CN209387791U - Ring network cabinet line fault location monitoring device - Google Patents

Abstract

The utility model relates to distribution automation technical fields, more particularly to a kind of ring network cabinet line fault Position monitoring devices, it is installed in the intelligent ring main unit with PT, including fault detector, tidal data recovering terminal, monitoring host computer and main website, the fault detector includes display device for short circuit and earth-fault indicator, every road inlet-outlet line that the display device for short circuit corresponds to intelligent ring main unit is arranged three, it is respectively fitted over A, B, on C three-phase cable, every road inlet-outlet line that earth-fault indicator corresponds to intelligent ring main unit is arranged one, it covers on cable for monitoring zero-sequence current；Fault detector is communicated by tidal data recovering terminal with monitoring host computer, and monitoring host computer is communicated by communication module with main website.The utility model realizes the monitoring of ring network cabinet route operating status, can position in time after failure.

Description

Ring network cabinet line fault location monitoring device

technical field

The utility model relates to the technical field of distribution network automation, in particular to a circuit fault location monitoring device of a ring network cabinet.

Background technique

The short circuit and grounding of the cable lines in the ring network cabinet are one of the biggest safety hazards of power outages, especially in the substation cable line exit section and important multi-voltage level integrated channels. Once a short circuit or grounding occurs, it will cause a large-scale power outage. After the power outage, the fault cannot be located in time, which further expands the loss caused by the power outage. In particular, the ring network cabinet is different from the overhead line. The cable is inside the ring network cabinet, and the fault indicator cannot be effectively indicated. If a fault occurs in the ring network cabinet one by one, the workload is heavy and the time is long, which is not conducive to troubleshooting.

Utility model content

In order to solve the above technical problems, the purpose of this utility model is to provide a ring network cabinet line fault location monitoring device to realize the monitoring of the running state of the ring network cabinet line and to locate it in time after a fault.

The technical scheme that the utility model adopts for solving its technical problem is:

The ring network cabinet line fault location monitoring device is installed in the intelligent ring network cabinet with PT, including a fault indicator, a data collection terminal, a monitoring host and a master station, and the fault indicator includes a short-circuit fault indicator and a grounding Fault indicator, the short-circuit fault indicator corresponds to each input and output line of the intelligent ring network cabinet, and three are set respectively on the A, B, and C three-phase cables, and the ground fault indicator corresponds to each line of the intelligent ring network cabinet. There is one incoming and outgoing line, which is set on the cable to monitor the zero-sequence current; the fault indicator communicates with the monitoring host through the data collection terminal, and the monitoring host communicates with the master station through the communication module.

Preferably, the data collection unit adopts two remote data collectors.

Preferably, the communication module is built in the monitoring host, and adopts 2/3/4G module or WIFI module.

The above-mentioned short-circuit fault indicator is used to detect whether there is a short-circuit in the A, B, and C three-phase cables, and outputs the short-circuit fault current, load current, remote signal status, and display; the ground fault indicator is used to monitor the zero-sequence current and check whether the line is grounded fault, output fault current and remote signaling status; the data collection terminal is used to collect the data collected by the short-circuit fault indicator and ground fault indicator; the monitoring host is used to collect the data of the data collection terminal and process the data. The data is transmitted to the main station through the communication module; the main station performs fault location and judgment according to the power supply topology diagram and the monitoring points of the power supply topology diagram, and records the fault current at the same time.

The open circuit fault indicator, ground fault indicator, and data collection terminal monitoring host designed in the technical scheme all adopt the existing structure, and no additional restrictions are imposed on its structure and function.

Compared with the prior art, the utility model has the following beneficial effects:

The utility model realizes the monitoring of the running state of the circuit of the ring network cabinet, and can locate in time after a fault occurs. The short-circuit fault indicator is used to detect whether there is a short-circuit in the A, B, and C three-phase cables, and outputs the short-circuit fault current, load current, remote signaling status, and replay display; the ground fault indicator is used to monitor the zero-sequence current to check whether there is a ground fault in the line , to output fault current and remote signal status; the data collection terminal is used to collect the data collected by the short-circuit fault indicator and ground fault indicator; the monitoring host is used to collect the data of the data collection terminal and process the data, and the data It is transmitted to the main station through the communication module; the main station performs fault location and judgment according to the power supply topology diagram and the monitoring points of the power supply topology diagram, and records the fault current at the same time.

Description of drawings

Fig. 1 is a system block diagram of the utility model.

Figure 2 is a schematic diagram of a single power supply trunk line fault.

Figure 3 is a schematic diagram of a single power supply branch line fault.

Figure 4 is a schematic diagram of a dual power supply trunk line fault.

Figure 5 is a schematic diagram of a dual power supply trunk line fault

Figure 6 is a schematic diagram of a fault in a branch line of a dual power supply.

Detailed ways

Below in conjunction with accompanying drawing, the utility model embodiment is further described:

Example 1:

As shown in Figure 1, the ring network cabinet line fault location monitoring device described in the utility model is installed in an intelligent ring network cabinet with a PT, including a fault indicator, a data collection terminal, a monitoring host and a master station, and the fault The indicators include a short-circuit fault indicator and a ground fault indicator. Three short-circuit fault indicators are set corresponding to each incoming and outgoing line of the intelligent ring network cabinet, which are respectively set on the A, B, and C three-phase cables. The ground fault indicator One device is set corresponding to each incoming and outgoing line of the intelligent ring network cabinet, which is set on the cable to monitor the zero-sequence current; the fault indicator communicates with the monitoring host through the data collection terminal, and the monitoring host communicates with the master station through the communication module.

Among them, the data collection unit adopts two remote data collectors; the communication module is built into the monitoring host, and adopts 2/3/4G module or WIFI module.

The above-mentioned short-circuit fault indicator is used to detect whether there is a short-circuit in the A, B, and C three-phase cables, and outputs the short-circuit fault current, load current, remote signal status, and display; the ground fault indicator is used to monitor the zero-sequence current and check whether the line is grounded fault, output fault current and remote signaling status; the data collection terminal is used to collect the data collected by the short-circuit fault indicator and ground fault indicator; the monitoring host is used to collect the data of the data collection terminal and process the data. The data is transmitted to the main station through the communication module; the main station performs fault location and judgment according to the power supply topology diagram and the monitoring points of the power supply topology diagram, and records the fault current at the same time.

Figure 2 is a schematic diagram of a fault on the main line of a single power supply. When a fault occurs on the main line between L3 and L4, the fault indicators set at L1, L2, and L3 will detect signals such as fault current and voltage. All fault indicators set will send fault information to the master station; the master station judges that the fault point is located between L3 and L4 based on the line topology and the location information of the fault indicator, and sends the fault information to the relevant responsible personnel.

Figure 3 is a schematic diagram of a single power supply branch line fault. If a fault occurs on the branch between LA2 and LA3, the fault indicators set at L1, L2, LA1, and LA2 will detect signals such as fault current and voltage. L1, L2, and LA1 , the fault indicators set at LA2 will send fault information to the master station; the master station judges that the fault point is located between LA2 and LA3 based on the line topology and the location information of the fault indicator, and sends the fault information to the relevant responsible personnel .

Figure 4 is a schematic diagram of the main line fault of the dual power supply. Substation 1 supplies power. If a fault occurs on the main line between L3 and L4, the fault indicators set at L1, L2, and L3 will detect signals such as fault current and voltage. L1 The fault indicators set at , L2, and L3 will all send fault information to the master station; the master station judges that the fault point is located between L3 and L4 based on the line topology and the location information of the fault detection and acquisition unit, and sends the fault information to Relevant responsible personnel.

Fig. 5 is a schematic diagram of a main line fault of dual power supply, and substation 2 supplies power. If a fault occurs on the branch between L3 and L4, L4, L5, and L6 will detect fault current, voltage and other signals, and L4, L5, and L6 will send fault information to the master station. The master station application software combines the line topology and The location information of the fault detection and acquisition unit judges that the fault point is located between L3 and L4, and sends the fault information to the relevant responsible personnel.

As shown in Figure 6, it is a schematic diagram of the fault of the dual power supply branch circuit. If a fault occurs on the branch between LA2 and LA3, the fault indicators set at L3, L4, L5, L6, LA1, and LA2 will detect the fault current and voltage. Waiting for the signal, the fault indicators set at L3, L4, L5, L6, LA1, LA2 will send fault information to the master station; the master station judges that the fault point is located in LA2 and LA3 based on the line topology and the location information of the fault indicator , and send the fault information to the relevant responsible personnel.

Claims (3)

1. a kind of ring network cabinet line fault Position monitoring devices, are installed in the intelligent ring main unit with PT, which is characterized in that packet Fault detector, tidal data recovering terminal, monitoring host computer and main website are included, the fault detector includes display device for short circuit and connects Earth fault indicator, the display device for short circuit correspond to intelligent ring main unit every road inlet-outlet line be arranged three, be respectively fitted over A, B, on C three-phase cable, every road inlet-outlet line that earth-fault indicator corresponds to intelligent ring main unit is arranged one, covers and is used on cable Monitor zero-sequence current；Fault detector is communicated by tidal data recovering terminal with monitoring host computer, and monitoring host computer passes through communication mould Block is communicated with main website.

2. ring network cabinet line fault Position monitoring devices according to claim 1, which is characterized in that the tidal data recovering list Member uses two distant data collectors.

3. ring network cabinet line fault Position monitoring devices according to claim 1, which is characterized in that in the communication module It is placed in monitoring host computer, using 2/3/4G module or WIFI module.