CN216848064U

CN216848064U - Detection apparatus for transformer substation

Info

Publication number: CN216848064U
Application number: CN202220390799.XU
Authority: CN
Inventors: 朱莹; 贾静丽; 张菲菲; 刘咏
Original assignee: State Grid Corp of China SGCC; Information and Telecommunication Branch of State Grid Henan Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; Information and Telecommunication Branch of State Grid Henan Electric Power Co Ltd
Priority date: 2022-02-25
Filing date: 2022-02-25
Publication date: 2022-06-28
Anticipated expiration: 2032-02-25

Abstract

The utility model provides a detection apparatus of transformer substation, the effectual current gaseous leak testing mode of SF6 of having solved causes the problem of threat to staff's in the transformer substation life safety. Detection device include detection circuitry and alarm circuit, detection device utilize gas sensor U1 to detect the gas signal of SF6 in the transformer substation to the gas signal that utilizes to detect starts alarm circuit, alarm circuit then produces reminder signal after carrying out comparison with the gaseous pressure signal of circuit breaker SF6, respectively with reminder signal and pressure signal to master control room, thereby guaranteed staff's life safety.

Description

Detection apparatus for transformer substation

Technical Field

The utility model relates to a transformer substation detection area, especially a detection device of transformer substation.

Background

At present, SF6 gas has great advantages in insulation and arc extinction, so SF6 gas is increasingly used as an insulating medium in a transformer substation, especially in cities with high power supply requirements, but SF6 gas has strong toxicity, and if SF6 gas leaks in the transformer substation, life safety of workers in the transformer substation is threatened.

Therefore, technicians develop long-term research on how to detect SF6 gas leakage, and detection of SF6 gas leakage is mainly realized by a GIS device at present, namely a pressure gauge of SF6 detects AF6 gas pressure, when the gas pressure of a breaker SF6 is lower than a certain value, a place for detecting SF6 gas leakage and subsequent rescue work are carried out, but the mode can be detected only after the SF6 gas leakage is in a large area, and the leaked SF6 gas threatens the life safety of workers.

Therefore, the utility model provides a new scheme to solve the problem.

Disclosure of Invention

The utility model aims at providing a detection device of transformer substation, the effectual gaseous leakage detection mode of SF6 who has solved causes the problem of threat to staff's in the transformer substation life safety that exists.

The technical scheme includes that the detection device of the transformer substation comprises a detection circuit and an alarm circuit, the detection device detects a gas signal of SF6 in the transformer substation by using a gas sensor U1, the alarm circuit is started by using the detected gas signal, the alarm circuit compares a pressure signal of SF6 gas and generates a reminding signal, and the reminding signal and the pressure signal are respectively transmitted to a main control room.

Further, the detection circuit detects an SF6 gas signal in the substation by using the gas sensor U1, amplifies the gas signal, and starts the alarm circuit by using the amplified gas signal.

Furthermore, the detection circuit comprises a resistor R1, one end of a resistor R1 is connected with an out pin of the gas sensor U1, the other end of the resistor R1 is connected with a non-inverting end of an operational amplifier U2B, inverting ends of the operational amplifier U2B are respectively connected with one end of the resistor R3 and one end of the resistor R4, an output end of the operational amplifier U2B is respectively connected with one end of the resistor R5, a base of a transistor Q2 and the other end of a resistor R3, a collector of a transistor Q2 is respectively connected with the other end of the resistor R5, one end of a relay K1, a VCC pin of the gas sensor U1 and a positive power source VCC, an emitter of the transistor Q2 is respectively connected with one end of the resistor R6 and one end of the resistor R11, the other end of the resistor R6 is connected with a base of a transistor Q3, a collector of the transistor Q3 is connected with the other end of the relay K1, an emitter of the transistor Q3 is connected with one end of the resistor R7, and the other end of the resistor R7 is respectively connected with one end of the resistor R11, The other end of the resistor R4 is connected in parallel with the gnd pin of the gas sensor U1 and is connected to ground.

Further, the alarm circuit is started by the alarm circuit, and then compares the pressure signal of the gas of the circuit breaker SF6, so as to obtain a reminding signal, and transmits the reminding signal and the amplified pressure signal to the main control room.

Further, the alarm circuit includes a switch S1, one end of the switch S1 is connected to the pressure signal, the other end of the switch S1 is connected to one end of a resistor R8 and an anode of a thyristor Q5, the other end of the resistor R8 is connected to a non-inverting end of an operational amplifier U3B, a non-inverting end of the operational amplifier U3B is connected to one end of a resistor R9, the other end of the resistor R9 is connected to one end of a resistor R10, an emitter of a transistor Q1, a collector of the transistor Q4, one end of a resistor R14, one end of a relay K1 in the detection circuit and is connected to a VCC, an output end of the operational amplifier U3B is connected to the other end of a resistor R10, a base of a transistor Q1, and an anode of a diode D2, a cathode of the diode D2 is connected to one end of a capacitor C1 and a control electrode of the thyristor Q5, a collector of the transistor Q1 and a collector of the diode D3 and a cathode of the resistor R3 are connected to an anode of a diode D12, and a cathode of the fault circuit 13 are connected to an anode of the resistor D3, One end of a bidirectional voltage-stabilizing tube D1, an emitter of a triode Q4 and a main control chamber, wherein a base electrode of the triode Q4 is respectively connected with one end of a capacitor C2, one end of a resistor R15 and the other end of a resistor R14, the other end of the resistor R15 is respectively connected with the other end of the capacitor C2 and an output end of an operational amplifier U4B, an inverting end of the operational amplifier U4B is respectively connected with one end of a resistor R17 and one end of a resistor R16, a non-inverting end of the operational amplifier U4B is connected with a cathode of the thyristor Q5, the other end of the resistor R17 is respectively connected with the other end of the capacitor C1, the other end of the resistor R12, the other end of the resistor R13, the other end of the bidirectional voltage-stabilizing tube D1 and the other end of the resistor R7 in the detection circuit and connected with the ground in parallel.

The utility model discloses a following beneficial effect:

gaseous SF6 in to the transformer substation through setting up detection circuitry detects, realize detecting the gaseous real-time detection that carries out of SF6 that leaks, and start alarm circuit immediately when detecting the gaseous SF6 that leaks, and whether the gaseous pressure of SF6 is in normal condition this moment of detection, thereby remind the main control room, the effectual appearance that has solved the problem that the present gaseous leakage detection mode of SF6 causes the threat to the life safety of the staff in the transformer substation.

Drawings

Fig. 1 is a schematic diagram of the detection circuit of the present invention.

Fig. 2 is a schematic diagram of the alarm circuit of the present invention.

Detailed Description

The foregoing and other technical and scientific aspects, features and advantages of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings of fig. 1-2. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.

Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

The utility model provides a detection device of transformer substation, detection device includes detection circuitry and alarm circuit, detection device utilizes gas sensor U1 to detect the gas signal of SF6 in the transformer substation to utilize the gas signal who detects to start alarm circuit, alarm circuit then produces the reminder signal after comparing the gaseous pressure signal of circuit breaker SF6, respectively with reminder signal and pressure signal to master control room.

The detection circuit comprises a resistor R1, one end of the resistor R1 is connected with an out pin of a gas sensor U1, the other end of the resistor R1 is connected with a non-inverting end of an operational amplifier U2B, an inverting end of the operational amplifier U2B is connected with one end of a resistor R3 and one end of a resistor R4 respectively, an output end of the operational amplifier U2B is connected with one end of a resistor R5, a base of a triode Q2 and the other end of a resistor R3 respectively, a collector of the triode Q2 is connected with the other end of a resistor R5, one end of a relay K1 and a VCC pin of the gas sensor U1 respectively and is connected with a positive power supply VCC, an emitter of the triode Q2 is connected with one end of a resistor R6 and one end of a resistor R11 respectively, the other end of the resistor R6 is connected with a base of a triode Q3, a collector of the triode Q3 is connected with the other end of a relay K1, an emitter of the triode Q3 is connected with one end of a resistor R7, and the other end of a resistor R7 are connected with the other end of a resistor R11 respectively, The other end of the resistor R4 and the gnd pin of the gas sensor U1 are connected in parallel and grounded;

the detection circuit detects SF6 gas signals in the transformer substation by using a gas sensor U1, wherein the gas sensor is an SF6 gas sensor, an infrared SF6 gas sensor with the model similar to NE/SF6-101 can be used for detection, when the gas signals are transmitted to an operational amplifier U2B through a resistor R1, SF6 gas leakage is indicated in the transformer substation at the moment, the leakage area is unknown, the operational amplifier U2B amplifies the gas signals at the moment, the phenomenon that the alarm circuit cannot be started due to weak amplitude of the detected gas signals is avoided, the driving capability of the gas signals is improved by using a triode Q2, then the triode Q3 is conducted by the gas signals, a relay K1 is conducted by a triode Q3, and the alarm circuit is started at the moment.

The alarm circuit comprises a switch S1, one end of the switch S1 is connected with a pressure signal, the other end of the switch S1 is connected with one end of a resistor R8 and the anode of a thyristor Q5, the other end of the resistor R8 is connected with the non-inverting end of an operational amplifier U3B, the inverting end of the operational amplifier U3B is connected with one end of a resistor R9, the other end of the resistor R9 is connected with one end of a resistor R10, the emitter of a triode Q1, the collector of a triode Q4, one end of a resistor R14, one end of a relay K1 in the detection circuit and a positive power supply VCC, the output end of the operational amplifier U3B is connected with the other end of the resistor R10, the base of a triode Q1 and the anode of a diode D2, the cathode of the diode D2 is connected with one end of a capacitor C2 and the control pole of the thyristor Q2, the collector of the triode Q2 is connected with the anode of the diode D2 and one end of the resistor R2, and the cathode of the diode D2 is connected with the cathode of the anode of the resistor R2, and one end of the fault R2, One end of a bidirectional voltage-stabilizing tube D1, an emitter of a triode Q4 and a main control chamber, wherein a base electrode of the triode Q4 is respectively connected with one end of a capacitor C2, one end of a resistor R15 and the other end of a resistor R14, the other end of the resistor R15 is respectively connected with the other end of the capacitor C2 and an output end of an operational amplifier U4B, an inverting end of the operational amplifier U4B is respectively connected with one end of a resistor R17 and one end of a resistor R16, a non-inverting end of the operational amplifier U4B is connected with a cathode of the thyristor Q5, the other end of the resistor R17 is respectively connected with the other end of the capacitor C1, the other end of the resistor R12, the other end of the resistor R13, the other end of the bidirectional voltage-stabilizing tube D1 and the other end of the resistor R7 in the detection circuit and connected in parallel to the ground;

a switch S1 in the alarm circuit is switched from an open state to a closed state by a relay K1 in a detection circuit, namely the alarm circuit is started at the moment, a pressure signal at the moment is transmitted to an operational amplifier U3B through a resistor R8, wherein the pressure signal is a pressure value detected by an SF6 pressure gauge and converted by an A/D converter, the operational amplifier U3B compares the pressure signal with a standard pressure signal provided by the resistor R9, wherein the pressure signal is a lowest safety threshold value of SF6 gas detected on the pressure gauge, when the operational amplifier U3B switches on a triode Q1, the pressure of the SF6 gas is still in a normal range, namely SF6 gas in a transformer substation leaks little, at the moment, the triode Q1 switches on a diode D3, the diode D3 outputs a reminding signal to a main control room to remind a worker in the main control room of needing to pay attention, and when the operational amplifier U3B switches on the diode D2, the pressure of the SF6 gas is lower than the lowest safety threshold value at the moment, namely SF6 gas in the transformer substation leaks more, the thyristor Q5 is conducted by the diode D2 through the capacitor C1 at the moment, the thyristor Q5 transmits the pressure signal at the moment to the operational amplifier U4B for amplification, the amplified pressure signal is rapidly transmitted to the main control room through the capacitor C2, the resistor R15 and the triode Q4, the staff in the main control room is reminded of rapidly rescuing the leaked SF6 gas, and meanwhile, the bidirectional voltage-stabilizing tube D1 is used for avoiding the situation that the pressure signal is amplified too much and influences equipment in the main control room.

When the utility model is used, the detection circuit utilizes the gas sensor U1 to detect SF6 gas signal in the transformer substation, when the gas signal is transmitted to the operational amplifier U2B through the resistor R1, the operational amplifier U2B amplifies the gas signal at this moment, and utilize the triode Q2 to improve the driving capability of the gas signal, then the gas signal switches on the triode Q3, the triode Q3 switches on the relay K1, the alarm circuit is started at this moment, the switch S1 in the alarm circuit is switched from the off-state to the on-state by the relay K1 in the detection circuit, the pressure signal at this moment is transmitted to the operational amplifier U3B through the resistor R8, the operational amplifier U3B compares the pressure signal with the standard pressure signal provided by the resistor R9, when the operational amplifier U3B switches on the triode Q1, the triode Q1 makes the diode D3 switched on, then the diode D3 outputs the reminding signal to the master control room, reminding the staff of master control room to notice that SF6 gas leakage has appeared in the transformer substation, and when fortune player U3B switched on diode D2, then diode D2 utilized electric capacity C1 to switch on thyristor Q5 this moment, thyristor Q5 then transmits the pressure signal this moment to fortune player U4B and enlargies, the pressure signal after the amplification then transmits to the master control room fast through electric capacity C2, resistance R15, triode Q4, the staff of reminding the master control room needs to salvage leaking SF6 gas fast.

The utility model discloses realize following beneficial effect:

(1) the detection circuit is arranged to detect SF6 gas in the transformer substation, real-time detection of leaked SF6 gas is achieved, the alarm circuit is started immediately when the leaked SF6 gas is detected, and whether the pressure of the SF6 gas is in a normal state or not is detected, so that a main control room is reminded, and the problem that the life safety of workers in the transformer substation is threatened by the existing SF6 gas leakage detection mode is effectively solved;

(2) the detection circuit is arranged to amplify the detected gas signal, namely the detected weak SF6 gas signal is amplified, and the problem that the alarm circuit cannot be driven by the gas signal is avoided;

(3) pressure signals are compared when the detection circuit detects the gas signals through setting the alarm circuit, so that the degree of SF6 gas leakage is accurately judged, and when SF6 gas leakage is more, the pressure signals are rapidly transmitted to the main control room after being amplified, workers in the main control room are reminded to start the rescue work of the transformer substation, and the life safety of the workers is further guaranteed.

Claims

1. The detection device of the transformer substation is characterized by comprising a detection circuit and an alarm circuit, wherein the detection circuit detects a gas signal of SF6 in the transformer substation by using a gas sensor U1, the alarm circuit is started by using the detected gas signal, and the alarm circuit compares a pressure signal of SF6 gas of a circuit breaker and then generates a reminding signal to respectively send the reminding signal and the pressure signal to a main control room.

2. The substation detection device of claim 1, wherein the detection circuit detects an SF6 gas signal in the substation by using a gas sensor U1, amplifies the gas signal, and activates the alarm circuit by using the amplified gas signal.

3. The substation detection device according to claim 2, wherein the detection circuit comprises a resistor R1, one end of the resistor R1 is connected to an out pin of the gas sensor U1, the other end of the resistor R1 is connected to a non-inverting terminal of the operational amplifier U2B, an inverting terminal of the operational amplifier U2B is connected to one end of the resistor R3 and one end of the resistor R4, an output terminal of the operational amplifier U2B is connected to one end of the resistor R5, a base of the transistor Q2 and the other end of the resistor R3, a collector of the transistor Q2 is connected to the other end of the resistor R5, one end of the relay K1, a VCC pin of the gas sensor U1 and a positive power VCC, an emitter of the transistor Q2 is connected to one end of the resistor R6 and one end of the resistor R11, the other end of the resistor R6 is connected to a base of the transistor Q3, a collector of the transistor Q3 is connected to the other end of the relay K1, and an emitter of the transistor Q3 is connected to one end of the resistor R7, the other end of the resistor R7 is connected with the other end of the resistor R11, the other end of the resistor R4 and the gnd pin of the gas sensor U1 and is connected with the ground.

4. The substation detection device according to claim 1, wherein the alarm circuit is activated to compare pressure signals of SF6 gas to obtain a warning signal, and the warning signal and the amplified pressure signal are transmitted to the main control room.

5. The substation detection device according to claim 4, wherein the alarm circuit comprises a switch S1, one end of the switch S1 is connected to the pressure signal, the other end of the switch S1 is connected to one end of a resistor R8 and the anode of a thyristor Q5, the other end of the resistor R8 is connected to the non-inverting end of an operational amplifier U3B, the inverting end of the operational amplifier U3B is connected to one end of a resistor R9, the other end of the resistor R9 is connected to one end of a resistor R10, the emitter of a transistor Q1, the collector of a transistor Q4, one end of a resistor R14, one end of a relay K1 in the detection circuit is connected to a positive power source VCC, the output end of the operational amplifier U3B is connected to the other end of a resistor R10, the base of a transistor Q1 and the anode of a diode D2, the cathode of a diode D2 is connected to one end of a capacitor C1 and the control electrode of a thyristor Q5, and the collector of a diode Q1 is connected to the anode of a diode D3, One end of a resistor R12, the cathode of a diode D3 is respectively connected with one end of an electrical fault R13, one end of a bidirectional voltage regulator D1, the emitter of a triode Q4 and a main control chamber, the base of the triode Q4 is respectively connected with one end of a capacitor C2, one end of a resistor R15 and the other end of a resistor R14, the other end of the resistor R15 is respectively connected with the other end of a capacitor C2 and the output end of an operational amplifier U4B, the inverting end of the operational amplifier U4B is respectively connected with one end of a resistor R17 and one end of a resistor R16, the non-inverting end of the operational amplifier U4B is connected with the cathode of a thyristor Q5, the other end of the resistor R17 is respectively connected with the other end of a capacitor C1, the other end of a resistor R12, the other end of a resistor R13, the other end of the bidirectional voltage regulator D1 and the other end of a resistor R7 in the detection circuit are connected in parallel to the ground.