CN106225950A - A kind of power cable distributed temperature measuring system based on photoswitch - Google Patents

Abstract

The invention discloses a power cable distributed temperature measurement system based on an optical switch, and relates to the technical field of power cable temperature measurement. The present invention includes a first optical switch, a second optical switch and an optical converter; the input port of the first optical switch is connected to a cable distributed optical fiber temperature measurement system, the output end of the first optical switch is connected to one end of the main cable, and the other end of the main cable One end is connected to the input end of the second optical switch, and the output end of the second optical switch is correspondingly connected to a branch cable; the optical converter is connected to a computer PC, and the computer PC controls the working states of the first optical switch and the second optical switch through the optical converter; The second optical switch is placed at the combined switch or transformer of the cable. The real-time monitoring of the temperature of multiple pairs of cables is realized through the optical switch, and at the same time, a main line is connected to the optical switch to divide it into multiple branch cables, so as to achieve a more effective and economical monitoring method.

Description

A distributed temperature measurement system for power cables based on optical switches

technical field

The invention relates to the technical field of power cable temperature measurement, in particular to a power cable distributed temperature measurement system based on an optical switch.

Background technique

With the implementation of urban power grid transformation and the decline of cable application costs, power cables have been used more and more widely. Some cities in China have gradually replaced overhead lines, but the ensuing application of cables has led to a sharp increase in their number and failure problems caused by excessively long running times.

In order to realize the real-time monitoring of cables, people have developed a cable distributed optical fiber temperature measurement system. The distributed optical fiber temperature measurement system can realize multi-point, online distributed measurement. It uses optical fiber to sense temperature information and transmit temperature information at the same time. It has the characteristics of high temperature resistance, electromagnetic radiation protection, high bandwidth, etc., thus greatly improving the temperature resolution and spatial resolution, and can effectively solve emergency situations such as high temperature. The problem. Although this method realizes real-time online monitoring of the temperature of the cable, there are many branch cables in the cable line, and it is obviously not economical to connect each line to the cable distributed optical fiber temperature measurement system. That is to say, the monitoring of multiple lines of the cable also adopts the least channels of the optical fiber distributed temperature measurement system as much as possible, so as to save costs and achieve economy.

Contents of the invention

In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a distributed temperature measurement system for power cables based on an optical switch, which realizes orderly real-time monitoring of multiple lines by connecting an optical switch.

The present invention is realized by the following technical solutions: a distributed temperature measurement system for power cables based on an optical switch, including a first optical switch, a second optical switch and an optical converter; the input port of the first optical switch is connected to a distributed Optical fiber temperature measurement system, the output port of the first optical switch is connected to one end of the main cable, the other end of the main cable is connected to the input port of the second optical switch, and the output port of the second optical switch is correspondingly connected to the branch cable; the optical converter is connected to a computer PC, the computer PC controls the working state of the first optical switch and the second optical switch through the optical converter; the second optical switch is placed at the combined switch or transformer of the cable.

Preferably, the first optical switch has 2 input ports and 6 output ports; the second optical switch has 6 input ports and 18 output ports; the 2 input ports of the first optical switch are directly distributed with cables The optical fiber temperature measurement system is connected, and the 6 output ports are connected in pairs to one end of the 3 main cables; the 6 input ports of the second optical switch are connected in pairs to the other end of the 3 main cables, and the second optical switch The 18 output ports of the switch are divided into three groups, and each group of 6 output ports is correspondingly connected with three branch cables.

The beneficial effects of the present invention are: realize the real-time monitoring of the temperature of multiple pairs of cables through the optical switch, and at the same time connect a main line to the optical switch to divide it into multiple branch cables, thereby achieving a more effective and economical monitoring means; easy to install, Anti-interference, strong reliability, high sensitivity, high precision, real-time monitoring can be realized, and has industrial utilization value.

Description of drawings

Fig. 1 is a schematic block diagram of the present invention.

detailed description

Below in conjunction with accompanying drawing of description, this patent is described further.

As shown in Figure 1, a distributed temperature measurement system for power cables based on optical switches includes a first optical switch 1, a second optical switch 2 and an optical converter 4; the input port of the first optical switch is connected to the distributed optical fiber of the cable Temperature measurement system 3, the output port of the first optical switch 1 is connected to one end of the main cable, the other end of the main cable is connected to the input port of the second optical switch 2, and the output port of the second optical switch 2 is correspondingly connected to the branch cable; optical converter 4 Connect a computer PC 5 through the UTP line 6, and the computer PC 5 controls the working status of the first optical switch 1 and the second optical switch 2 through the optical converter 4; the second optical switch 2 is placed at the combined switch or transformer of the cable .

In this embodiment, the first optical switch has 2 input ports and 6 output ports; the second optical switch has 6 input ports and 18 output ports.

The two input ports of the first optical switch 1 are connected to the cable distributed optical fiber temperature measurement system (DTS), and the 6 output ports of the first optical switch 1 are connected in pairs to one end of the three cables A, B, and C. , orderly monitoring of the three cables A, B, and C is realized by switching the first optical switch 1 . The other ends of the three cables A, B, and C are connected to the input end of the second optical switch 2, and if the second optical switch 2 is placed on a power cable combined switch or a transformer, the output ports of the second optical switch 2 share 18, of which 6 output ports form a group of three groups; the output ports of the first group are connected to the three branch lines divided by cable A, that is, the three branch cables A1, A2, and A3; the output ports of the second group are connected to the The three branch lines divided by cable B are connected, that is, three branch cables B1, B2, and B3; the output port of the third group is connected with the three branch lines divided by cable C, that is, three branch cables C1, C2, and C3; Any one of the main cable lines can be selected through the control of the optical switch 2, and its three branch cables can be monitored in an orderly manner. At the same time, the optical converter establishes a connection with the optical switch, and is connected with the computer 5 through the UTP line 6 to realize the control of the optical switch.

The innovation point of the present invention is that, according to the disadvantages in the cable distributed optical fiber temperature measurement system, a method of using an optical switch to switch lines is proposed to realize orderly monitoring of multiple cable lines, and at the same time, it is aimed at the branch of a main line Input optical switches at all places to realize the orderly monitoring of multiple branch cables, achieve the same distributed temperature monitoring effect, and better reflect the economy.

The above is only the design of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any skilled person familiar with the profession, Without departing from the scope of the technical solution of the present invention, when the technical content disclosed above can be used to make some changes or be modified into equivalent embodiments with equivalent changes, but any content that does not depart from the technical solution of the present invention, according to the technology of the present invention In essence, any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solution of the present invention.

Claims (2)

1. A power cable distributed temperature measurement system based on an optical switch, characterized in that: comprise a first optical switch, a second optical switch and an optical converter; the input port of the first optical switch is connected to a cable distributed optical fiber temperature measurement system , the output port of the first optical switch is connected to one end of the main cable, the other end of the main cable is connected to the input port of the second optical switch, and the output port of the second optical switch is correspondingly connected to the branch cable; the optical converter is connected to a computer PC, and the computer PC The working states of the first optical switch and the second optical switch are controlled through the optical converter; the second optical switch is placed at the combined switch or the transformer of the cable. 2. A distributed temperature measurement system for power cables based on an optical switch according to claim 1, wherein the first optical switch has 2 input ports and 6 output ports; the second optical switch has 6 1 input port and 18 output ports; the 2 input ports of the first optical switch are directly connected to the cable distributed optical fiber temperature measurement system, and the 6 output ports are connected to one end of the 3 main cables in pairs; the second optical switch The 6 input ports of the switch are connected in pairs to the other ends of the 3 main cables, the 18 output ports of the second optical switch are divided into three groups, and the 6 output ports in each group are connected to three branch cables.