CN103674320B - Gas-insulated high-voltage switch cabinet contact temperature measurement device - Google Patents

Abstract

The invention discloses a contact temperature measuring device of a gas-insulated high-voltage switchgear, wherein, an optical fiber temperature-measuring sensor, whose signal output end is connected with the input end of an optical lens and located in the gas-insulated high-voltage switchgear, is used for collecting and sensing The optical signal of the temperature in the gas-insulated high-voltage switchgear and transmits the optical signal to the optical lens; the output end of the optical lens is connected with the input end of the signal processing circuit and installed on the wall of the gas-insulated high-voltage switchgear for receiving The optical signal transmitted by the optical fiber temperature sensor and the processed signal is transmitted to the signal processing circuit; the output terminal of the signal processing circuit is connected to the input terminal of the collector and is located outside the gas-insulated high-voltage switchgear for processing the optical lens Pass the signal and pass the processed signal to the collector. The invention thoroughly solves the electrical isolation between high and low voltage, can diagnose the thermal fault of the contact of the gas-insulated high-voltage switchgear, and guarantees the safe operation of the power system.

Description

Gas-insulated high-voltage switchgear contact temperature measuring device

technical field

The invention relates to a contact temperature measuring device of a gas-insulated high-voltage switch cabinet.

Background technique

In order to ensure the safe operation of the power system, the diagnosis of thermal faults in the power system is generally valued by people. When the high-voltage bus is overloaded or the contact of the high-voltage switch is not in good contact, the contact resistance will become larger and heat will be generated when the load current flows. , This heating phenomenon causes insulation aging or even breakdown, thereby causing a short circuit, forming a major accident, and causing major economic losses.

In the power supply system using power cables for power transmission and distribution, statistics show that more than 90% of cable failures are caused by joint failures, and joint contact resistance increases, overload, etc. cause joint temperature to be too high, which is the main cause of failure. reason. According to the survey and statistics of Beijing Electric Power Research Institute, temperature rise faults accounted for 8.9% of the distribution voltage level switch accidents in China's power system throughout the 1990s. It is of great significance to the safe and reliable operation of the power system to eliminate the hidden dangers of thermal faults.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a gas-insulated high-voltage switchgear contact temperature measuring device, which completely solves the electrical isolation between high and low voltage, and can control the contact temperature of the gas-insulated high-voltage switchgear Diagnose thermal faults to ensure the safe operation of the power system.

In order to solve the above technical problems, the technical solution adopted by the present invention is: a gas-insulated high-voltage switchgear contact temperature measurement device, including a collector and at least one set of optical fiber temperature measurement units, the optical fiber temperature measurement unit includes an optical fiber temperature measurement sensor, Optical lens and signal processing circuit; wherein,

The optical fiber temperature sensor, whose signal output end is connected to the input end of the optical lens and located in the gas-insulated high-voltage switchgear, is used to collect the optical signal capable of sensing the temperature in the gas-insulated high-voltage switchgear and transmit the optical signal to the optical lens ;

Optical fiber temperature sensor includes optical fiber and optical fiber photosensitive head;

The optical lens, whose output end is connected to the input end of the signal processing circuit and installed on the wall of the gas-insulated high-voltage switch cabinet, is used to receive the optical signal transmitted by the optical fiber temperature sensor and transmit the processed signal to the signal processing circuit ;

The signal processing circuit, whose output terminal is connected to the input terminal of the collector and located outside the gas-insulated high-voltage switchgear, is used to process the signal transmitted by the optical lens and transmit the processed signal to the collector.

Further, there are six groups of optical fiber temperature measurement units.

Furthermore, the collector includes an acquisition processing circuit, an interface circuit and a power supply circuit, the output end of the signal processing circuit is connected with the input end of the acquisition processing circuit, the interface circuit is connected with the output end of the acquisition processing circuit, and the power supply circuit is connected with the acquisition processing circuit. The power terminals of the processing circuit are connected.

After adopting the above technical scheme, the contact temperature measuring device of the gas-insulated high-voltage switchgear of the present invention uses an optical fiber temperature sensor for temperature measurement in the cabinet, does not need to provide power, and uses optical fiber to transmit information, completely solving the problem between high and low voltage. Electrical isolation, using optical lenses to transmit information, completely solves the problem of gas sealing inside and outside the cabinet, and can diagnose thermal faults of contacts in gas-insulated high-voltage switchgear to ensure the safe operation of the power system.

Description of drawings

Fig. 1 is a schematic structural view of a contact temperature measuring device for a gas-insulated high-voltage switchgear of the present invention;

Fig. 2 is a schematic diagram of the contact temperature measuring device of the gas-insulated high-voltage switchgear of the present invention;

In Fig. 1, 1 is an optical fiber temperature sensor, 2 is an optical lens, 3 is a signal processing circuit, 4 is a collector, 5 is an inner wall of a gas-insulated high-voltage switch cabinet, and 6 is an outer wall of a gas-insulated high-voltage switch cabinet.

detailed description

In order to make the content of the present invention more clearly understood, the present invention will be further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

As shown in Figures 1 to 2, a gas-insulated high-voltage switchgear contact temperature measurement device includes a collector 4 and at least one set of optical fiber temperature measurement units. The optical fiber temperature measurement unit includes an optical fiber temperature measurement sensor 1, an optical lens 2 and Signal processing circuit 3; wherein,

The optical fiber temperature sensor 1, whose signal output end is connected to the input end of the optical lens 2 and located in the gas-insulated high-voltage switchgear, is used to collect the optical signal capable of sensing the temperature in the gas-insulated high-voltage switchgear and transmit the optical signal to Optical lens 2;

Optical fiber temperature sensor 1 comprises optical fiber and optical fiber photosensitive head;

The optical lens 2, whose output end is connected to the input end of the signal processing circuit 3 and installed on the wall of the gas-insulated high-voltage switch cabinet, is used to receive the optical signal transmitted by the optical fiber temperature sensor 1 and transmit the processed signal to Signal processing circuit 3;

The signal processing circuit 3 , whose output end is connected to the input end of the collector 4 and located outside the gas-insulated high-voltage switchgear, is used to process the signal transmitted by the optical lens 2 and transmit the processed signal to the collector 4 .

As shown in Figure 2, there are six groups of optical fiber temperature measurement units.

As shown in Figure 2, the collector 4 includes a collection processing circuit 4-1, an interface circuit 4-2 and a power supply circuit 4-3, the output end of the signal processing circuit 3 is connected with the input end of the collection processing circuit 4-1, and the interface The circuit 4-2 is connected to the output terminal of the collection and processing circuit 4-1, and the power supply circuit 4-3 is connected to the power supply terminal of the collection and processing circuit 4-1.

The contact temperature measuring device of the gas-insulated high-voltage switchgear of the present invention adopts an optical fiber temperature measuring sensor 1 for temperature measurement in the cabinet, does not need to provide power supply, and uses optical fiber to transmit information, completely solves the electrical isolation between high and low voltage, and uses optical The lens 2 transmits information, completely solves the problem of gas sealing inside and outside the cabinet, and can diagnose the thermal fault of the contact of the gas-insulated high-voltage switchgear to ensure the safe operation of the power system.

The specific embodiments described above have further described the technical problems, technical solutions and beneficial effects solved by the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (3)

1. The utility model provides a gas insulation high tension switchgear contact temperature measuring device which characterized in that: the optical fiber temperature measurement device comprises a collector (4) and at least one group of optical fiber temperature measurement units, wherein each optical fiber temperature measurement unit comprises an optical fiber temperature measurement sensor (1), an optical lens (2) and a signal processing circuit (3); wherein,

the signal output end of the optical fiber temperature measuring sensor (1) is connected with the input end of the optical lens (2), is positioned in the gas insulated high-voltage switch cabinet and is used for collecting optical signals capable of sensing the temperature in the gas insulated high-voltage switch cabinet and transmitting the optical signals to the optical lens (2);

the optical fiber temperature measuring sensor (1) comprises an optical fiber and an optical fiber photosensitive head;

the output end of the optical lens (2) is connected with the input end of the signal processing circuit (3), is arranged on the wall of the gas-insulated high-voltage switch cabinet and is used for receiving the optical signal transmitted by the optical fiber temperature measuring sensor (1) and transmitting the processed signal to the signal processing circuit (3);

and the output end of the signal processing circuit (3) is connected with the input end of the collector (4) and is positioned outside the gas insulated high-voltage switch cabinet, and the signal processing circuit is used for processing the signal transmitted by the optical lens (2) and transmitting the processed signal to the collector (4).

2. The temperature measuring device for the contact of the gas insulated high-voltage switch cabinet according to claim 1, characterized in that: the optical fiber temperature measuring units are provided with six groups.

3. The gas insulated high-voltage switch cabinet contact temperature measuring device according to claim 1 or 2, characterized in that: the collector (4) comprises a collecting and processing circuit (4-1), an interface circuit (4-2) and a power supply circuit (4-3), the output end of the signal processing circuit (3) is connected with the input end of the collecting and processing circuit (4-1), the interface circuit (4-2) is connected with the output end of the collecting and processing circuit (4-1), and the power supply circuit (4-3) is connected with the power supply end of the collecting and processing circuit (4-1).