CN111426920B - Fire and/or arc detection device and method for high-voltage direct-current transmission converter valve - Google Patents
Fire and/or arc detection device and method for high-voltage direct-current transmission converter valve Download PDFInfo
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- CN111426920B CN111426920B CN202010300379.3A CN202010300379A CN111426920B CN 111426920 B CN111426920 B CN 111426920B CN 202010300379 A CN202010300379 A CN 202010300379A CN 111426920 B CN111426920 B CN 111426920B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1218—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using optical methods; using charged particle, e.g. electron, beams or X-rays
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/185—Electrical failure alarms
Abstract
A fire/arc detection device and method applied to a high-voltage direct-current transmission converter valve, the device comprises: the device comprises a light detection module, a first sampling module, a second sampling module, a control module and a light communication module; the light detection module detects light signals generated by fire and/or electric arcs, induces corresponding voltage/current signals and transmits the voltage/current signals to the control module through the first sampling module and/or the second sampling module; the control module processes the voltage/current signals, judges whether the high-voltage direct-current transmission converter valve is in fire and/or generates electric arcs, and transmits the judgment result to the background monitoring device through the optical communication module. The detection device is conveniently arranged at the upper end part of the converter valve assembly, monitors the fire/arc discharge condition in the whole high-voltage direct-current transmission converter valve assembly, transmits the monitored fire/arc discharge signal to the background monitoring device through the optical fiber, does not change the electrical structure of the converter valve assembly, and improves the reliability of detecting the fire/arc discharge in the converter valve assembly.
Description
Technical Field
The invention belongs to the technical field of high-power electronics, and particularly relates to a fire and/or arc detection device and method applied to a high-voltage direct-current transmission converter valve.
Background
The high-voltage direct-current transmission converter valve equipment is internally composed of various electrical elements, works in a high-voltage and high-current severe operation environment for a long time, is influenced by various factors such as aging of components and high-voltage impact, can generate hidden danger of fire accidents caused by heating of components in the converter valve in the long-term operation process, can stop operation of a direct-current transmission project, and can cause fire safety accidents of the converter valve or a valve hall under severe conditions.
At present, the fire prevention of a high-voltage direct-current transmission converter valve is a difficult problem, and a far-end infrared or ultraviolet detection device arranged on the wall around a valve hall is mainly adopted to detect the fire and the electric arc of the converter valve. Because the converter valve is hoisted up and down by a plurality of components from top to bottom, the detection device around the wall has a monitoring dead angle, and the fire condition in the middle of the converter valve can not be detected.
Disclosure of Invention
The invention aims to provide a device and a method for detecting fire/electric arc inside a high-voltage direct-current transmission converter valve assembly, which are arranged above a single assembly of a converter valve, monitor the occurrence of the fire/electric arc inside the single assembly and report alarm information of the fire or electric arc generated inside the converter valve in time.
To achieve the above object, a first aspect of the present invention provides a fire/arc detection apparatus applied to a high voltage dc transmission converter valve, comprising: the device comprises a light detection module, a first sampling module, a second sampling module, a control module and a light communication module;
the light detection module is connected with the first sampling module and the second sampling module and is used for detecting light signals generated by fire and/or electric arcs and inducing corresponding voltage/current signals to be transmitted to the first sampling module and/or the second sampling module;
the first sampling module and the second sampling module are respectively connected with the control module and are used for transmitting sampled voltage/current signals to the control module;
the control module is electrically connected with the optical communication module, processes the voltage/current signal, judges whether the high-voltage direct-current transmission converter valve is in fire and/or generates electric arc, and transmits the judgment result to the background monitoring device through the optical communication module.
Further, the light detection module comprises a photocell which generates voltage and current internally in case of fire and/or arc of the HVDC converter valve.
Further, the first sampling module comprises a sampling resistor R1, and two ends of the sampling resistor R1 are respectively connected with the light detection module and the control module.
Further, the second sampling module comprises a blocking capacitor C and a sampling resistor R2, and the blocking capacitor C and the sampling resistor R2 are connected in series and then connected in parallel with the sampling resistor R1; and two ends of the adoption resistor R2 are connected with the control module.
Furthermore, the device also comprises a power supply module which supplies power for the control module.
Furthermore, the power supply module comprises an energy taking power supply and an energy taking magnetic ring, and the energy taking magnetic ring is sleeved on a bus of the high-voltage direct-current transmission converter valve.
Further, the device also comprises an alarm module;
the control module is connected with the alarming module, and the control module controls the alarming module to alarm when the high-voltage direct-current transmission converter valve is in fire and/or generates electric arcs.
The second aspect of the invention provides a fire/arc detection method applied to a high-voltage direct-current transmission converter valve, which adopts the detection device for detection and comprises the following steps:
detecting voltage/current signals transmitted by the first sampling module and the second sampling module;
judging whether the high-voltage direct-current transmission converter valve is in fire and/or generates electric arcs according to the voltage/current signals;
and transmitting the processed voltage/current signal to a background monitoring device through an optical communication module.
Further, the step of judging whether the HVDC converter valve is in fire and/or generates an electric arc according to the voltage/current signal comprises:
judging whether the voltage/current signal amplitude of the first sampling module reaches a first threshold value, if so, fire disasters occur, and if not, fire disasters do not occur;
and judging whether the voltage/current signal amplitude of the second sampling module reaches a second threshold value, if so, generating an arc, and if not, not generating the arc.
Further, the method also comprises the step of alarming;
and when the judgment result shows that the high-voltage direct-current transmission converter valve is in a fire and/or generates an electric arc, the control module controls the alarm module to alarm.
In summary, the present invention provides a fire/arc detection apparatus and method for a high voltage dc transmission converter valve, the apparatus comprising: the device comprises a light detection module, a first sampling module, a second sampling module, a control module and a light communication module; the light detection module detects light signals generated by fire and/or electric arcs, induces corresponding voltage/current signals and transmits the voltage/current signals to the control module through the first sampling module and/or the second sampling module; the control module processes the voltage/current signals, judges whether the high-voltage direct-current transmission converter valve is in fire and/or generates electric arcs, and transmits the judgment result to the background monitoring device through the optical communication module.
The invention has the beneficial effects that: the detection device is conveniently arranged at the upper end part of the converter valve assembly, monitors the fire/arc discharge condition in the whole high-voltage direct-current transmission converter valve assembly, transmits the monitored fire/arc discharge signal to the background monitoring device through the optical fiber, does not change the electrical structure of the converter valve assembly, and improves the reliability of fire/arc discharge detection in the converter valve assembly.
Drawings
Fig. 1 is a schematic structural diagram of a fire/arc detection device applied to a high-voltage direct-current transmission converter valve according to an embodiment of the invention;
fig. 2 is a schematic structural diagram of a fire/arc detection device applied to a high-voltage direct-current transmission converter valve according to another embodiment of the invention;
fig. 3 is a schematic structural diagram of a fire/arc detection device applied to a high-voltage direct-current transmission converter valve according to another embodiment of the invention;
FIG. 4 is a schematic diagram of the installation position of a fire/arc detection device applied to a HVDC converter valve according to an embodiment of the present invention;
fig. 5 is a schematic flow chart of a fire/arc detection method applied to a high-voltage direct-current transmission converter valve according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It is to be understood that these descriptions are only illustrative and are not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
A first aspect of the present invention provides a fire/arc detection apparatus applied to a hvdc valve for high voltage dc transmission, as shown in fig. 1, comprising: the device comprises a light detection module, a first sampling module, a second sampling module, a control module and a light communication module; the light detection module is connected with the first sampling module and the second sampling module and is used for detecting light signals generated by fire and/or electric arcs and inducing corresponding voltage/current signals to be transmitted to the first sampling module and/or the second sampling module; the first sampling module and the second sampling module are respectively connected with the control module and used for transmitting sampled voltage/current signals to the control module; the control module is electrically connected with the optical communication module, processes the voltage/current signals, judges whether the high-voltage direct-current transmission converter valve is in a fire disaster and/or generates electric arcs, and transmits the judgment result to the background monitoring device through the optical communication module.
Fig. 2 shows a specific embodiment of the detection device of the present invention. Specifically, the light detection module comprises a photocell, the photocell is used as a detection element for fire and/or electric arc generation in the converter valve assembly, the photocell and other control accessories are arranged at the upper end of the converter valve assembly at a certain angle, the light sensing angle just comprises the whole converter valve assembly area, when fire and/or electric arc discharge occurs in the assembly, voltage and light current are generated on the photocell, and the control module detects the photocell current and transmits the photocell current to the acquired monitoring system through the optical communication module (specifically, an optical fiber) after processing.
Specifically, as shown in fig. 2, the first sampling module includes a sampling resistor R1, and two ends of the sampling resistor R1 are respectively connected to the light detection module and the control module. The second sampling module comprises a blocking capacitor C and a sampling resistor R2, and the blocking capacitor C is connected with the sampling resistor R2 in series and then is connected with the sampling resistor R1 in parallel; and two ends of the resistor R2 are connected with the control module.
Furthermore, the device also comprises a power supply module which supplies power for the control module. Specifically, the power supply module includes an energy-taking power supply and an energy-taking magnetic ring (or an energy-taking CT, as shown in fig. 2), and the energy-taking magnetic ring is sleeved on a bus of the high-voltage direct-current transmission converter valve. The magnetic ring can not be saturated under rated square wave current of the converter valve, the pulse square wave current flowing when the converter valve works is utilized to obtain energy, the energy-obtaining magnetic ring works to supply power to the detection device when the converter valve outputs minimum current, and the device can not work when the converter valve does not output current, so that the reliability of the device is improved. A magnetic ring with an air gap is sleeved on the incoming and outgoing bus bar of the converter valve assembly to obtain energy to supply power to the detection device, and the integral electrical structure of the converter valve is not changed.
Furthermore, the system also comprises an alarm module, as shown in fig. 3, the alarm module is connected with the control module, and the control module controls the alarm module to alarm when the high-voltage direct-current transmission converter valve is in a fire and/or generates an electric arc.
As shown in fig. 4, the detecting means is mounted on the upper part of the converter valve assembly and the monitoring angle of the photovoltaic cell panel can cover the whole converter valve assembly (as shown by the dashed line in fig. 4).
A second aspect of the present invention provides a fire/arc detection method applied to a high voltage direct current transmission converter valve, which uses the detection device as described above for detection, as shown in fig. 5, and includes the following steps:
step S100, detecting voltage/current signals transmitted by a first sampling module and a second sampling module;
step S200, judging whether the high-voltage direct-current transmission converter valve is in fire and/or generates electric arcs according to the voltage/current signals;
and step S300, transmitting the processed voltage/current signal to a background monitoring device through an optical communication module.
Further, the step of determining whether the hvdc valve is in fire and/or generates an arc according to the voltage/current signal in step S200 includes:
judging whether the voltage/current signal amplitude of the first sampling module reaches a first threshold value, if so, generating a fire, otherwise, generating no fire;
and judging whether the voltage/current signal amplitude of the second sampling module reaches a second threshold value, if so, generating an arc, and if not, not generating the arc.
Further, the method also comprises the step of alarming; and when the judgment result is that the high-voltage direct-current transmission converter valve is in a fire and/or generates an electric arc, the control module controls the alarm module to alarm.
Specifically, the principle of the fire/arc detection method of the high-voltage direct-current transmission converter valve assembly is as follows: when an arc discharge or a fire is generated in the assembly, a voltage and a photocurrent are generated on the photocell by the fire light source and the arc, the photocurrent establishes a voltage on the sampling resistor R1, and the amplitude of the voltage on the R1 is related to the sensed light intensity. For a fire or a steady state light source, the signal is relatively stable. For intermittent arc, the signal on R1 is a pulsating signal, the steady-state direct-current component generated by the photocell is filtered through the blocking capacitor C, and the pulsating current signal corresponding to the transient arc passes through the capacitor C and then generates a pulsating voltage signal corresponding to the transient arc on the sampling resistor R2. Whether the interior of the converter valve assembly is on fire or not can be detected by detecting the steady-state amplitude of the steady-state signal of the sampling resistor R1, and whether the interior of the converter valve assembly is in arc or not can be detected by detecting the transient-state signal amplitude of the sampling resistor R2. The control module transmits the detected signals on the R1 and the R2 to the ground potential or a background monitoring system through the optical fiber after processing.
In summary, the present invention provides a fire/arc detection apparatus and method for a high voltage dc converter valve, the apparatus comprising: the device comprises a light detection module, a first sampling module, a second sampling module, a control module and a light communication module; the light detection module detects light signals generated by fire and/or electric arcs, induces corresponding voltage/current signals and transmits the voltage/current signals to the control module through the first sampling module and/or the second sampling module; the control module processes the voltage/current signals, judges whether the high-voltage direct-current transmission converter valve is in fire and/or generates electric arcs, and transmits the judgment result to the background monitoring device through the optical communication module. The detection device is conveniently arranged at the upper end part of the converter valve assembly, monitors the fire/arc discharge condition in the whole high-voltage direct-current transmission converter valve assembly, transmits the monitored fire/arc discharge signal to the background monitoring device through the optical fiber, does not change the electrical structure of the converter valve assembly, and improves the reliability of fire/arc discharge detection in the converter valve assembly.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (8)
1. A fire and/or arc detection device for a HVDC converter valve, comprising: the device comprises a light detection module, a first sampling module, a second sampling module, a control module and a light communication module;
the light detection module is connected with the first sampling module and the second sampling module and is used for detecting light signals generated by fire and/or electric arcs and inducing corresponding voltage/current signals to be transmitted to the first sampling module and/or the second sampling module;
the first sampling module and the second sampling module are respectively connected with the control module and are used for transmitting sampled voltage/current signals to the control module;
the control module is electrically connected with the optical communication module, processes the voltage/current signal, judges whether the high-voltage direct-current transmission converter valve is in a fire disaster and/or generates electric arc, and transmits the judgment result to the background monitoring device through the optical communication module;
the first sampling module comprises a sampling resistor R1, two ends of the sampling resistor R1 are respectively connected with the light detection module, and two ends of the sampling resistor R1 are also respectively connected with the control module;
the second sampling module comprises a blocking capacitor C and a sampling resistor R2, and the blocking capacitor C is connected with the sampling resistor R2 in series and then is connected with the sampling resistor R1 in parallel; and two ends of the sampling resistor R2 are connected with the control module.
2. Fire and/or arc detection apparatus for HVDC converter valves according to claim 1, wherein the light detection module comprises a photocell that generates voltage and current internally in case of a fire and/or an arc of the HVDC converter valve.
3. The fire and/or arc detection device applied to the HVDC converter valve of claim 1, further comprising a power supply module for supplying power to the control module.
4. The device as claimed in claim 3, wherein the power supply module comprises an energy-taking power supply and an energy-taking magnetic ring, and the energy-taking magnetic ring is sleeved on a bus of the HVDC converter valve.
5. The fire and/or arc detection device applied to the HVDC converter valve according to any one of claims 1-4, further comprising an alarm module;
the control module is connected with the control module, and the control module controls the alarm module to give an alarm when the high-voltage direct-current transmission converter valve is in a fire and/or generates an electric arc.
6. A fire and/or arc detection method applied to a high-voltage direct-current transmission converter valve, which is used for detecting by using the detection device of any one of claims 1-5, and is characterized by comprising the following steps:
detecting voltage/current signals transmitted by the first sampling module and the second sampling module;
judging whether the high-voltage direct-current transmission converter valve is in fire and/or generates electric arcs according to the voltage/current signals;
and transmitting the processed voltage/current signal to a background monitoring device through an optical communication module.
7. The method according to claim 6, wherein the step of determining whether the HVDC converter valve is in fire and/or arcing comprises:
judging whether the voltage/current signal amplitude of the first sampling module reaches a first threshold value, if so, fire disasters occur, and if not, fire disasters do not occur;
and judging whether the voltage/current signal amplitude of the second sampling module reaches a second threshold value, if so, generating an electric arc, and if not, generating no electric arc.
8. A fire and/or arc detection method as applied to a hvdc valve for high voltage direct current transmission according to claim 6 or 7, characterized by further comprising the step of alarming;
and when the judgment result shows that the high-voltage direct-current transmission converter valve is in a fire and/or generates an electric arc, the control module controls the alarm module to alarm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010300379.3A CN111426920B (en) | 2020-04-16 | 2020-04-16 | Fire and/or arc detection device and method for high-voltage direct-current transmission converter valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010300379.3A CN111426920B (en) | 2020-04-16 | 2020-04-16 | Fire and/or arc detection device and method for high-voltage direct-current transmission converter valve |
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| CN111426920A CN111426920A (en) | 2020-07-17 |
| CN111426920B true CN111426920B (en) | 2022-11-29 |
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| CN112180283A (en) * | 2020-09-02 | 2021-01-05 | 深圳市伊力科电源有限公司 | Fire alarm system and uninterrupted power source |
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