CN109701182B - Novel flexible direct-current converter transformer fire-fighting fire-extinguishing system based on three-taking-two mode - Google Patents
Novel flexible direct-current converter transformer fire-fighting fire-extinguishing system based on three-taking-two mode Download PDFInfo
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Abstract
The invention relates to a fire control starting technology for flexible direct current converter transformer, in particular to a novel flexible direct current converter transformer fire extinguishing system based on a three-out-of-two mode, which comprises two sets of temperature sensing cables, wherein a valve side lifting seat, a net side lifting seat and a temperature sensing cable wiring and winding at three positions of a sleeve root of the converter transformer are added on the original basis; three sets of flame detectors are arranged at a high position, and two sets of flame detectors are horizontally and diagonally distributed at the position lower than the sound insulation barrier of the converter transformer; and the fire control logic control system is also provided, the three sets of flame detectors adopt OR logic as 1 alarm outlets, then the OR logic is used for triggering and starting the fire control device to extinguish fire together with tripping action of the breaker at the converter transformer network side along with the outlets of 2 sets of temperature sensing cable temperature alarms according to the logic principle of three taking two. The invention has the advantages that: the misoperation prevention, the refusal prevention, the protection control comprehensiveness increase, and the reliable and stable operation of the flexible direct current converter station are ensured.
Description
Technical Field
The invention relates to a fire control starting technology for flexible direct current converter transformer, in particular to a novel flexible direct current converter transformer fire extinguishing system based on a three-out-of-two mode.
Background
In addition to the IGBT converter valves for implementing ac/dc conversion, a converter transformer (hereinafter, abbreviated as converter transformer) is also one of the key core devices in the flexible dc converter station. In the prior art, related fire-fighting measures of high-voltage flexible direct-current converter transformer configuration are crucial, a transformer foam spraying fire-extinguishing system or a water spraying fire-extinguishing system is generally configured by referring to an extra-high-voltage direct-current station, and referring to fig. 1, the device comprises two sets of cable type linear temperature sensing cables, a breaker tripping signal receiving unit and a logic triggering device, the two sets of cable type linear temperature sensing cables are wound on a converter transformer device body, a conservator and an oil pipeline in a double-layer distribution mode, logic signal output ends of the two sets of cable type linear temperature sensing cables are connected with an input end of the logic triggering device through a logic judging device, the breaker tripping signal receiving unit is connected with the other input end of the logic triggering device, when a fire disaster occurs, the two sets of temperature sensing cables all emit logic signals, at the moment, the logic judging device sends the triggering signals to the logic triggering device after receiving the logic signals of the two sets of temperature sensing cables (logic sum), and in addition, the breaker tripping signal receiving unit also sends a tripping position signal of a converter transformer side breaker to the logic triggering device, and the logic triggering device sends a triggering starting signal to the fire-fighting device after receiving the two signals, so that the fire-fighting device is started by the fire-fighting device.
The existing fire-fighting control system has the following defects: 1. the control mode of the logical sum of the two sets of temperature sensing cables is to prevent misoperation, but the situation of refusal operation is brought, and the misoperation or refusal operation can lead to untimely extinguishment; 2. the fire disaster causes are various, although the temperature sensing cables are distributed in three most affected places, the three places are not absolute causes, once the fire disaster occurs in other places, even when open fire is caused, the temperature sensing cables cannot be affected at any time, the fire extinguishing time can be delayed, and the stable and reliable operation of the flexible direct current converter station is greatly affected.
Disclosure of Invention
The invention aims to provide a novel three-taking-two mode-based flexible direct current converter transformer fire-fighting fire-extinguishing system which can prevent misoperation, prevent refusal operation, increase the comprehensive protection control and guarantee the reliable and stable operation of a flexible direct current converter station according to the defects of the prior art.
The aim of the invention is achieved by the following ways:
novel flexible direct current conversion current fire extinguishing system based on two modes is got to three, and its main points lie in, include the following constitution:
1) The two sets of cable type linear temperature sensing cables are distributed in a double-layer mode and are wound on the converter transformer body and each component, and the two sets of cable type linear temperature sensing cables comprise the converter transformer body, the conservator, the oil delivery pipe, a valve side lifting seat of the converter transformer, a net side lifting seat and a sleeve root; each set of temperature sensing cable is continuously distributed, and the bending part is fixed through a flame-retardant clamp when in winding; each set of temperature sensing cable is provided with a logic signal output end;
2) Three sets of flame detectors are arranged and installed as follows:
the first set of flame detector is arranged at the middle top of the fireproof flame-proof wall at one side of the converter transformer, and the detection range comprises a conservator at the high position of the converter transformer, a valve side, a net side, a neutral point current transformer sleeve and a body at the low position of the converter transformer;
the second set of flame detectors and the third set of flame detectors are respectively arranged in the middle of fireproof flame-proof walls on two sides of the converter transformer, are arranged in a plane diagonal manner, are provided with sound-proof barriers with the height lower than that of the converter transformer, and the detection range comprises a converter transformer body inside the sound-proof barriers;
each set of flame detector is provided with an alarm logic signal output end;
3) The fire control logic control system comprises a breaker tripping signal receiving unit, a first logic judging unit, a second logic judging unit and a logic triggering output unit; the alarm logic signal output ends of the three sets of flame detectors are respectively connected with the first logic judgment unit, the logic signal output ends of the two sets of cable type linear temperature sensing cables are respectively connected with the second logic judgment unit, and meanwhile, the logic signal output ends of the first logic judgment unit are also connected with the second logic judgment unit; the logic signal output end of the second logic judging unit and the signal output end of the breaker tripping signal receiving unit are respectively connected with the logic triggering output unit; the trigger output end of the logic trigger output unit is connected with a starting unit of the converter transformer fire fighting device;
the first logic judging unit adopts OR logic to provide a logic signal outlet: when at least one of the three sets of flame detectors sends an alarm logic signal, the first logic judging unit outputs a logic signal to the second logic judging unit;
the second logic judging unit adopts OR logic to provide a logic signal outlet according to the logic principle of taking two three: when at least two groups of two sets of cable type linear temperature sensing cables and the first logic judging unit send logic signals to the second logic judging unit, the second logic judging unit outputs one logic signal to the logic trigger output unit;
the logic trigger output unit provides a trigger signal outlet by using AND logic: when the logic trigger output unit receives the logic signal output by the second logic judgment unit and the logic signal of the tripping position of the converter transformer network side breaker sent by the breaker tripping signal receiving unit, a trigger signal is sent to the starting unit of the converter transformer fire-fighting device, and the fire-fighting device is started to extinguish fire.
The continuous distribution of the temperature sensing cables means that all equipment is wound in a line connection mode, and no tap and no branch wiring exist. The technical key points of the invention include:
according to the characteristics of the converter transformer, when the converter transformer runs normally under high voltage, the heating values of components such as a valve side lifting seat, a net side lifting seat and a sleeve root of the converter transformer are not higher than those of a converter transformer body, a conservator and an oil pipeline, so that the components are not included in a fire-fighting monitoring range in the conventional technology in the field, but when equipment fails, abnormal working conditions such as insulating oil, equipment failure and insulation breakdown occur at the three positions, so that the temperature rises until the temperature is too high, and a fire condition occurs, and in addition, inflammable and explosive media, namely a transformer, are used for insulating oil.
Secondly, for high voltage power equipment, the operation of the equipment itself can cause heat generation, and in addition, fire generation is not started from temperature rise, and fire light can also be started, so that three sets of flame detectors are needed. However, according to the characteristics of the flexible direct current converter station, the installation position of the flame detector is organically designed based on the structure, the environmental condition and the detection performance of the flame detector, wherein the structure and the environmental condition can be provided with the flame detector: the method is characterized in that a sound insulation barrier Box-in used for isolating noise generated when the converter transformer body operates is taken as a boundary, the converter transformer body is taken as a main monitoring object, and a high-level set of flame detectors and a low-level set of flame detectors are arranged. Therefore, the distribution principle of the whole range and the main body of the converter transformer is realized by utilizing the advantages of the flame detector such as high response speed, long detection distance, good environmental adaptability and the like, and the response speed and the response reliability of the converter transformer fire-fighting fire-extinguishing system are improved.
Finally, on the basis of adding flame detectors, two sets of comprehensive temperature sensing cables are combined, a three-out-of-two mode logic judgment mode is designed, namely when a fire disaster occurs in a converter transformer area, 3 sets of flame detectors adopt OR logic as 1 alarm outlets, then the alarm outlets and 2 sets of temperature sensing cable temperature alarms are carried out according to the three-out-of-two logic principle, tripping action of a converter transformer side circuit breaker finally occurs simultaneously, and a fire alarm system automatically starts the outlet of a converter transformer fire extinguishing device to extinguish the fire disaster. The monitoring conditions are increased, and the automatic control mode of the fire alarm system in the converter transformer area is optimized on the basis of the increased monitoring conditions, so that the automatic start control logic outlet mode for preventing misoperation and refusal is effectively realized, the performance of the converter transformer fire extinguishing device is improved, and the safe and stable operation of the converter transformer and the converter station is reliably ensured.
The invention may further be embodied as:
the flame detector is a photosensitive fire detector, or an infrared detector, or an ultraviolet and infrared composite flame detector.
The flame detector is used for responding to the light characteristic of fire, namely, detecting the illumination intensity of flame combustion and the flicker frequency of the flame, and is divided into an ultraviolet detector sensitive to ultraviolet radiation with shorter wavelength in the flame, an infrared detector sensitive to infrared radiation with longer wavelength in the flame and a composite flame detector combining the two performances according to the light characteristic of the flame. Considering the characteristics of the converter station according to the invention, a composite flame detector is preferred. The requirements of the invention for the flame detector are: the visual angle range of the detector is 90-120 degrees, and the detection distance is 30-50 meters.
In summary, the invention provides a novel flexible direct current converter transformer fire-fighting fire extinguishing system based on a three-out-two mode, which comprises the steps of firstly expanding the laying range of a temperature-sensing cable, and increasing temperature-sensing cable wiring and winding at three positions of a valve side lifting seat, a net side lifting seat and a sleeve root of a converter transformer; secondly, adding three sets of flame detectors, arranging one set at a high position and distributing two sets at a horizontal diagonal position at a sound insulation barrier lower than converter transformer; and finally, 3 sets of flame detectors adopt OR logic as 1 alarm outlets, then the alarm outlets and 2 sets of temperature sensing cable temperature alarms are used for triggering and starting a fire fighting device to extinguish fire together with tripping action of a breaker at the converter transformer network side according to the logic principle of three taking two. The invention has the advantages that: the misoperation prevention, the refusal prevention, the protection control comprehensiveness increase, and the reliable and stable operation of the flexible direct current converter station are ensured.
Drawings
Fig. 1 is a schematic diagram of a fire control logic structure of a flexible dc converter station in the prior art.
Fig. 2 is a schematic diagram of a fire control logic structure of the novel flexible direct current converter transformer fire extinguishing system based on the three-taking-two mode.
FIG. 3 is a schematic diagram of a distributed laying structure of a temperature sensing cable according to the present invention;
FIG. 4 is a schematic elevational view of a distributed arrangement of fire detectors according to the present invention;
fig. 5 is a schematic view showing a horizontal structure of a distributed arrangement of fire detectors according to the present invention.
The invention is further described below with reference to examples.
Detailed Description
Best mode for carrying out the invention:
referring to fig. 2-5, the novel flexible direct current conversion current change fire-fighting system based on the three-taking-two mode mainly comprises the following components:
1) Referring to fig. 3, two sets of cable type linear temperature sensing cables 1 are distributed in a double-layer mode and are wound on a converter transformer body and various components, and besides the original converter transformer body 2, a conservator 3 and an oil delivery pipe, the two sets of cable type linear temperature sensing cables also comprise a valve side lifting seat 5, a net side lifting seat 6 and a sleeve root 7 of the converter transformer; a neutral point elevation seat 4 and its bushing root may also be included. Each set of temperature sensing cable is continuously distributed, no tap or branch wiring is needed continuously, and the bending part is fixed by a flame-retardant clamp during winding; therefore, the laying mode and coverage area of the cable type linear temperature-sensing cable are optimized and perfected, the purpose of no dead zone in fire alarm detection is achieved, the temperature state of the equipment is monitored in all directions, and the reliability and the comprehensiveness of a fire alarm detector in a converter transformer fire extinguishing system are improved.
Each set of temperature sensing cable is provided with a logic signal output end, and when the temperature sensed by the temperature sensing cable exceeds a preset threshold value, the logic signal output end outputs a logic control signal;
2) Three sets of flame detectors, the arrangement of which is shown in figures 4 and 5, are as follows:
the first set of flame detectors 8 are arranged at the middle top of a fireproof flame-proof wall 11 at one side of the converter transformer, and the detection range comprises a conservator at the high position of the converter transformer, a valve side, a net side, a neutral point current transformer sleeve and a body at the low position of the converter transformer;
the second set of flame detectors 9 and the third set of flame detectors 10 are respectively arranged in the middle (middle position in height) of the fireproof flame-proof wall 11 on two sides of the converter transformer, are diagonally arranged on the plane with the converter transformer in the range of the sound-proof barrier Box-in as the center, are arranged in the range of the sound-proof barrier Box-in with the height lower than that of the converter transformer, and are arranged in the range of the detection including the converter transformer body in the range of the sound-proof barrier Box-in.
The detection range of each set of flame detector can be seen from the dashed line in the illustration of the equipment connection, the detectable distance is 30-50 meters, and the detection angle is 100-120 degrees. The three sets of flame detectors all adopt ultraviolet and infrared composite flame detectors. Each set of flame detector is provided with an alarm logic signal output end, and when the flame detector senses fire light or a flickering light signal, the alarm logic signal output end outputs a logic control signal when the fire light intensity or the flickering frequency of the light signal exceeds a set value.
3) Referring to fig. 2, the fire logic control system includes a breaker trip signal receiving unit, a first logic judging unit, a second logic judging unit and a logic trigger output unit; the alarm logic signal output ends of the three sets of flame detectors are respectively connected with the first logic judgment unit; the logic signal output ends of the two sets of cable type linear temperature sensing cables are respectively connected with the second logic judging unit, and meanwhile, the logic signal output end of the first logic judging unit is also connected with the second logic judging unit; the logic signal output end of the second logic judging unit and the signal output end of the breaker tripping signal receiving unit are respectively connected with the logic triggering output unit; the trigger output end of the logic trigger output unit is connected with a starting unit of the converter transformer fire fighting device;
the first logic judging unit adopts OR logic to provide a logic signal outlet: when at least one of the three sets of flame detectors sends alarm logic signals, namely the number of signal sources received by the first logic judging unit is n=1 or n >1, the first logic judging unit outputs a logic signal to the second logic judging unit;
the second logic judging unit adopts OR logic to provide a logic signal outlet according to the logic principle of taking two three: at least two groups of three signal sources provided by the two sets of cable type linear temperature sensing cables and the first logic judging unit send logic signals to the second logic judging unit, namely when the number N of the signal sources received by the second logic judging unit is more than or equal to 2, the second logic judging unit outputs a logic signal to the logic trigger output unit;
the logic trigger output unit provides a trigger signal outlet by using AND logic: when the logic trigger output unit receives the logic signal output by the second logic judgment unit and the logic signal of the tripping position of the converter transformer network side breaker sent by the breaker tripping signal receiving unit, a trigger signal is sent to the starting unit of the converter transformer fire-fighting device, and the fire-fighting device is started to extinguish fire.
The technical key points of the invention include as follows:
1) The laying mode and the coverage area of the cable type linear temperature sensing cable on the converter transformer equipment body in the existing scheme are perfected, the components such as the converter transformer body, the conservator, the oil delivery pipe, the valve side lifting seat, the net side lifting seat, the sleeve root and the like are effectively wired and wound, no dead angle of the converter transformer fire detection is ensured, the temperature state of the converter transformer equipment can be monitored in an omnibearing manner by the optimized temperature sensing cable laying mode, and the detection performance of the temperature sensing cable is improved.
2) According to the invention, by additionally arranging the ultraviolet and infrared composite flame detection, the device type of automatic fire alarm detection of the flexible direct-conversion current fire extinguishing device is enriched, a specific point distribution scheme of the ultraviolet and infrared composite flame detector in a fire alarm system in a conversion current area is provided, and a small amount of devices are additionally arranged, so that the purpose of reliably monitoring the running state of the devices at multiple angles is achieved.
3) The automatic fire alarm system of the converter transformer fire extinguishing device of the flexible direct current converter station is designed according to two sets of systems, namely a linear temperature sensing cable detection system and an ultraviolet and infrared composite flame detection system, when a fire occurs in a converter transformer area, 3 sets of ultraviolet and infrared composite detectors adopt OR logic as 1 alarm outlets, and 2 sets of temperature sensing cable temperature alarms are output according to the logic principle of three taking two, so that the optimized automatic starting control logic design technology of the converter transformer fire extinguishing system based on the three taking two modes can prevent misoperation and refusal operation, ensure that the automatic fire alarm system of the converter transformer provides the correctness and sensitivity of the outlet of the converter transformer fire extinguishing device, and ensure the safe and stable operation of the flexible converter station.
The invention is not described in part as in the prior art.
Claims (2)
1. Novel flexible direct current conversion current fire extinguishing system based on two modes is got to three, its characterized in that includes following constitution:
1) The two sets of cable type linear temperature sensing cables are distributed in a double-layer mode and are wound on the converter transformer body and each component, and the two sets of cable type linear temperature sensing cables comprise the converter transformer body, the conservator, the oil delivery pipe, a valve side lifting seat of the converter transformer, a net side lifting seat and a sleeve root; each set of temperature sensing cable is continuously distributed, and the bending part is fixed through a flame-retardant clamp when in winding; each set of temperature sensing cable is provided with a logic signal output end;
2) Three sets of flame detectors are arranged and installed as follows:
the first set of flame detector is arranged at the middle top of the fireproof flame-proof wall at one side of the converter transformer, and the detection range comprises a conservator at the high position of the converter transformer, a valve side, a net side, a neutral point current transformer sleeve and a body at the low position of the converter transformer;
the second set of flame detectors and the third set of flame detectors are respectively arranged in the middle of fireproof flame-proof walls on two sides of the converter transformer, sound-proof barriers with the height lower than that of the converter transformer are arranged diagonally in a plane in the range surrounded by the sound-proof barriers, and the detection range comprises a converter transformer body inside the sound-proof barriers;
each set of flame detector is provided with an alarm logic signal output end;
3) The fire control logic control system comprises a breaker tripping signal receiving unit, a first logic judging unit, a second logic judging unit and a logic triggering output unit; the alarm logic signal output ends of the three sets of flame detectors are respectively connected with the first logic judgment unit, the logic signal output ends of the two sets of cable type linear temperature sensing cables are respectively connected with the second logic judgment unit, and meanwhile, the logic signal output ends of the first logic judgment unit are also connected with the second logic judgment unit; the logic signal output end of the second logic judging unit and the signal output end of the breaker tripping signal receiving unit are respectively connected with the logic triggering output unit; the trigger output end of the logic trigger output unit is connected with a starting unit of the converter transformer fire fighting device;
the first logic judging unit adopts OR logic to provide a logic signal outlet: when at least one of the three sets of flame detectors sends an alarm logic signal, the first logic judging unit outputs a logic signal to the second logic judging unit;
the second logic judging unit adopts OR logic to provide a logic signal outlet according to the logic principle of taking two three: when at least two groups of two sets of cable type linear temperature sensing cables and the first logic judging unit send logic signals to the second logic judging unit, the second logic judging unit outputs one logic signal to the logic trigger output unit;
the logic trigger output unit provides a trigger signal outlet by using AND logic: when the logic trigger output unit receives the logic signal output by the second logic judgment unit and the logic signal of the tripping position of the converter transformer network side breaker sent by the breaker tripping signal receiving unit, a trigger signal is sent to the starting unit of the converter transformer fire-fighting device, and the fire-fighting device is started to extinguish fire.
2. The fire extinguishing system based on the three-out-of-two mode novel flexible direct current converter transformer is characterized in that the flame detector is a photosensitive fire detector, and the photosensitive fire detector is an infrared detector, an ultraviolet detector or an ultraviolet and infrared composite flame detector.
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| CN111790082B (en) * | 2020-06-22 | 2021-05-25 | 国网安徽省电力有限公司电力科学研究院 | Operation control method suitable for extra-high voltage converter station fire-fighting system |
| CN111790089B (en) * | 2020-06-22 | 2021-10-01 | 国网安徽省电力有限公司电力科学研究院 | Fire extinguishing system and method for in-operation extra-high voltage converter station and in-operation extra-high voltage converter station |
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