CN216144932U - 220 kilovolt cable dynamic capacity-increasing system - Google Patents
220 kilovolt cable dynamic capacity-increasing system Download PDFInfo
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- CN216144932U CN216144932U CN202121932114.1U CN202121932114U CN216144932U CN 216144932 U CN216144932 U CN 216144932U CN 202121932114 U CN202121932114 U CN 202121932114U CN 216144932 U CN216144932 U CN 216144932U
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Abstract
The utility model discloses a 220 KV cable dynamic capacity-increasing system, which aims to solve the problems that the conductor temperature and the current-carrying capacity of a cable cannot be calculated in real time, and the heat dissipation condition around the cable is not improved or forced cooling measures are not added, and comprises the following steps: the optical fiber temperature measuring modules are used for detecting the temperature of the outer surface of the cable and the ambient temperature; the point volt grating modules are used for measuring the temperature of the cable at the pipe arranging opening; the thermocouple modules are used for detecting the soil temperature; the sheath current modules are used for collecting the real-time running current of the cable; the plurality of heat dissipation and cooling modules are used for improving the heat dissipation conditions around the cable or increasing forced cooling measures; and the diagnosis analysis module is used for calculating the conductor temperature and the current-carrying capacity in real time. The utility model has the beneficial effects that: the device can improve the heat dissipation condition around the cable or increase the forced cooling measure, and can also calculate the conductor temperature and the current-carrying capacity of the cable in real time.
Description
Technical Field
The utility model relates to the technical field of cables, in particular to a 220 kV cable dynamic capacity-increasing system.
Background
At present, the central city area of a large-scale urban power grid has large power load and short cable channel resources, part of heavy-load lines become obvious transmission bottlenecks, the transmission potential of the existing cable is excavated through cable capacity increase, and the method has important significance for relieving urban power supply pressure.
At present, IEC60287, IEC853 and JB/T10181.3-2000 standards commonly adopted in cable ampacity calculation are aimed at steady-state calculation and are not suitable for calculating dynamic load. Moreover, the current carrying capacity of the cable is determined during the design phase, and due to the complexity and uncertainty of the heat transfer environment of the cable, designers often make the most unfavorable assumption of heat dissipation to obtain a sufficiently safe current value. This value will be used by the dispatch department throughout the cable life cycle. The problems of over-conservative value and large error of the current-carrying capacity of the cable are caused, and the power transmission capacity of the cable cannot be fully exerted.
At present, the technical means and related research of the dynamic capacity increase of the high-voltage cable line are not perfect, the practice and application cases of the dynamic capacity increase of the cable are few in China, and the method is applied to cities such as Shanghai, Guangzhou and the like. And correcting the current-carrying capacity calculation parameters of the cable according to the actually measured parameters of the region by taking the temperature of the conductor of the cable not exceeding the allowable temperature as a limiting condition, and predicting the short-term and long-term allowable current-carrying capacity of the cable line in real time. And the predicted current-carrying capacity is used as a capacity control value of the cable line, so that the dynamic capacity increase of the cable line is realized.
The other method is to improve the heat dissipation condition around the cable or add a forced cooling measure to reduce the operating temperature of the cable so as to improve the current-carrying capacity. The method mainly comprises the steps of filling a medium with a high heat conductivity coefficient in a calandria, filling a special cooling medium in an electric pipeline, laying a cooling pipeline outside a cable in parallel and the like, and only the first type has application.
The patent document in China discloses a quasi-dynamic capacity-increasing method based on a cable heat transfer model, and the publication number CN104330659B of the method comprises the following steps: 1) according to the working condition of the whole cable, a data acquisition system is established in the bottleneck cable section for carrying out data measurement on the same day; 2) according to the data of the bottleneck cable section measured by the data acquisition system on the same day, establishing and updating a cable heat transfer model of the bottleneck cable section on the next day by taking the day as a unit; 3) and estimating the current-carrying capacity of the cable to be subjected to capacity increase in the bottleneck cable section on the next day according to the cable heat transfer model of the bottleneck cable section on the next day, so as to realize the capacity increase of the cable. The disadvantages are as follows: the conductor temperature and the current-carrying capacity of the cable cannot be calculated in real time, and the heat dissipation condition around the cable is not improved or forced cooling measures are not added.
Disclosure of Invention
The utility model mainly aims to solve the problems that the temperature and the current-carrying capacity of a cable conductor cannot be calculated in real time, and the heat dissipation condition around the cable is not improved or forced cooling measures are not added, and provides a 220 kV cable dynamic capacity-increasing system which can calculate the temperature and the current-carrying capacity of the cable conductor in real time and has the functions of improving the heat dissipation condition around the cable or adding the forced cooling measures.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a 220 kv cable dynamic capacitance enhancement system, comprising:
the optical fiber temperature measuring modules are used for detecting the temperature of the outer surface of the cable and the ambient temperature;
the point volt grating modules are used for measuring the temperature of the cable at the pipe arranging opening;
the thermocouple modules are used for detecting the soil temperature;
the sheath current modules are used for collecting the real-time running current of the cable;
the plurality of heat dissipation and cooling modules are used for improving the heat dissipation conditions around the cable or increasing forced cooling measures;
and the diagnosis analysis module is used for calculating the conductor temperature and the current-carrying capacity in real time.
The optical fiber temperature measurement module is a temperature measurement optical fiber, the outer surface of the cable is subjected to temperature measurement in an optical fiber temperature measurement mode, and the two-loop cable line is wound with the temperature measurement optical fiber in a full-line mode. As the optical fiber in the calandria cannot be tightly attached to the surface of the cable, the cable at the calandria port is provided with the dot-shaped grating module for temperature measurement. The environment temperature adopts the mode of optical fiber temperature measurement and a thermocouple, the thermocouple module is buried in the soil of the pipe arrangement section for temperature measurement, and the temperature measurement optical fiber is laid on the wall of the cable trench, namely the optical fiber temperature measurement module.
The real-time load current of the power cable is another key factor for calculating the current-carrying capacity, the real-time current value in the cable conductor is obtained through the sheath current module, and the real-time calculation of the current-carrying capacity of the cable is carried out by combining the optical fiber temperature measurement module.
The diagnosis and analysis module calculates the real-time conductor temperature and the current-carrying capacity in a mode of establishing a calculation model, and predicts the change condition of the cable core wire temperature when the cable is loaded with any dynamic current-carrying capacity and the sustainable maximum time when a certain emergency load is loaded.
Preferably, the plurality of optical fiber temperature measuring modules, the plurality of point voltage grating modules, the plurality of thermocouple modules, the plurality of sheath current modules and the plurality of heat dissipation and cooling modules are all connected with the diagnosis and analysis module.
Through above-mentioned various detection module with heat dissipation cooling module with the diagnosis analysis module is connected, is convenient for the data that various modules were gathered are received to the diagnosis analysis module to through calculation analysis back, the prediction cable is when loading arbitrary dynamic current-carrying capacity the change condition of cable core wire temperature and load the sustainable longest time of a certain emergency load.
Preferably, the plurality of heat dissipation and temperature reduction modules comprise a plurality of low-thermal-resistance filling units filled in the cable duct sections.
And filling a low-thermal-resistance filling unit in the cable duct bank section with smaller current-carrying capacity, wherein the low-thermal-resistance filling unit is a low-thermal-resistance filling agent and is used for improving the heat dissipation condition and improving the current-carrying capacity. The cable pipe section is about 5 meters, the aperture of the calandria is large, the filling construction is easy to implement, the low-thermal-resistance filling agent is not solidified and hardened after filling, the service life of the material is more than 10 years, and the cleaning and the replacement are convenient after the material is invalid.
Preferably, the heat dissipation and cooling modules comprise a plurality of strong cooling circulation units, each strong cooling circulation unit comprises a circulation pump, a cooling tank, a plurality of pipelines arranged in the cable and a temperature control mechanism used for controlling the circulation pump, the circulation pump and the temperature control mechanism are arranged in the cooling tank, the circulation pump is connected with two ends of the pipelines, and two ends of the pipelines are provided with switch valve ports.
The pipelines are arranged in parallel at the top of each row pipe section, and can be arranged at the top of each row pipe section in parallel, so that the environmental temperature of the cables of the row pipe sections can be controlled conveniently. And judging whether each row pipe section exceeds a set temperature threshold value or not through the temperature control mechanism, starting the circulating pump through the temperature control mechanism if the row pipe section exceeds the temperature threshold value, circulating the cooling liquid in the cooling tank, reducing the environmental temperature of the cable through forced circulation, and improving the current-carrying capacity.
The switch valve port is used for controlling the circulation of cooling liquid, and the environmental temperature of cables of a plurality of row pipe sections can be controlled in a diversified mode. If a certain pipe section is in fault, the pipe section with the fault can be prevented from being fed by cooling liquid only by closing the switch valve port.
Preferably, the plurality of heat dissipation and temperature reduction modules comprise a plurality of low-thermal-resistance filling units filled in the cable duct sections and a plurality of strong cooling circulation units.
The heat dissipation and cooling module can be combined with the advantages of the low-thermal-resistance filling unit and the forced cooling circulation unit and arranged in the cable duct bank section, so that the heat dissipation condition around the cable can be effectively improved or the forced cooling is increased.
Preferably, the forced cooling circulation unit comprises a circulation pump, a cooling tank, a plurality of pipelines arranged in the cable and a temperature control mechanism for controlling the circulation pump, the circulation pump and the temperature control mechanism are arranged in the cooling tank, the circulation pump is connected with two ends of the pipelines, and two ends of the pipelines are provided with switch valve ports.
The pipelines are arranged in parallel at the top of each row pipe section, and can be arranged at the top of each row pipe section in parallel, so that the environmental temperature of the cables of the row pipe sections can be controlled conveniently. And judging whether each row pipe section exceeds a set temperature threshold value or not through the temperature control mechanism, starting the circulating pump through the temperature control mechanism if the row pipe section exceeds the temperature threshold value, circulating the cooling liquid in the cooling tank, reducing the environmental temperature of the cable through forced circulation, and improving the current-carrying capacity.
The switch valve port is used for controlling the circulation of cooling liquid, and the environmental temperature of cables of a plurality of row pipe sections can be controlled in a diversified mode. If a certain pipe section is in fault, the pipe section with the fault can be prevented from being fed by cooling liquid only by closing the switch valve port.
Preferably, the low thermal resistance filling unit includes a high thermal conductivity medium and a cooling medium.
The medium with higher heat conductivity coefficient can be filled in the cable duct bank, and the special cooling medium is filled in the electric pipeline, so that the heat dissipation condition around the cable is improved or forced cooling measures are added, the operating temperature of the cable is reduced, and the carrying capacity is improved.
Preferably, the temperature control mechanism comprises a cooling mechanism and a temperature sensing mechanism connected with the cooling mechanism, the cooling mechanism is provided with cooling liquid, and the temperature sensing mechanism is in contact with the cooling liquid.
The temperature sensing mechanism can be a temperature sensor and is used for detecting the temperature of the cooling liquid in the cooling mechanism, so that the temperature of the cooling liquid can be changed through the cooling mechanism, and the temperature control mechanism can control the temperature conveniently.
The cooling mechanism is used for heating or cooling the cooling liquid, so that the temperature of the cooling liquid can be changed according to requirements.
The utility model has the beneficial effects that:
(1) the device can improve the heat dissipation condition around the cable or increase the forced cooling measure.
(2) The real-time conductor temperature and current-carrying capacity of each module of the device are calculated, and the change condition of the cable core wire temperature when the cable is loaded with any dynamic current-carrying capacity and the sustainable maximum time for loading a certain emergency load are predicted.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the apparatus.
FIG. 2 is a schematic structural diagram of a second embodiment of the present device
FIG. 3 is a schematic structural diagram of a third embodiment of the present device
Fig. 4 is a schematic structural view of the forced cooling circulation unit.
Illustration of the drawings: the system comprises a 1-optical fiber temperature measuring module, a 2-photovoltaic grating module, a 3-thermocouple module, a 4-sheath current module, a 5-heat dissipation and cooling module, a 6-diagnostic analysis module, a 51-low thermal resistance filling unit, a 52-strong cooling circulation unit, a 521-circulating pump, a 522-cooling box, a 523-pipeline, a 524-temperature control mechanism, a 525-switch valve port, a 526-cold region mechanism and a 527-temperature sensing mechanism.
Detailed Description
The utility model is further described with reference to the following figures and detailed description.
The first embodiment is as follows:
as shown in fig. 1, a 220 kv cable dynamic capacity increasing system includes:
the optical fiber temperature measuring modules 1 are used for detecting the temperature of the outer surface of the cable and the ambient temperature;
the point-to-point grid modules 2 are used for measuring the temperature of the cable at the pipe arranging opening;
the thermocouple modules 3 are used for detecting the soil temperature;
the sheath current modules 4 are used for collecting the real-time running current of the cable;
the plurality of heat dissipation and cooling modules 5 are used for improving the heat dissipation conditions around the cable or adding forced cooling measures;
and the diagnostic analysis module 6 is used for calculating the conductor temperature and the current-carrying capacity in real time.
The optical fiber temperature measurement module is a temperature measurement optical fiber, the outer surface of the cable is subjected to temperature measurement in an optical fiber temperature measurement mode, and the two-circuit cable line is wound with the temperature measurement optical fiber in a full-line mode. As the optical fiber in the calandria cannot be tightly attached to the surface of the cable, the cable at the calandria port is provided with the dot-shaped grating module for temperature measurement. The environment temperature adopts the mode of optical fiber temperature measurement and thermocouple, the thermocouple module is buried in the soil of the calandria section for temperature measurement, and the temperature measurement optical fiber is laid on the cable trench wall, namely the optical fiber temperature measurement module.
The real-time load current of the power cable is another key factor for calculating the current-carrying capacity, the real-time current value in the cable conductor is obtained through the sheath current module, and the real-time calculation of the current-carrying capacity of the cable is carried out by combining the optical fiber temperature measuring module.
The diagnosis and analysis module calculates the real-time conductor temperature and the current-carrying capacity in a mode of establishing a calculation model, and predicts the change condition of the cable core wire temperature when the cable is loaded with any dynamic current-carrying capacity and the sustainable maximum time when a certain emergency load is loaded.
The plurality of optical fiber temperature measuring modules, the plurality of point voltage grating modules, the plurality of thermocouple modules, the plurality of sheath current modules and the plurality of heat dissipation and cooling modules are all connected with the diagnosis and analysis module.
The detection module and the heat dissipation and cooling module are connected with the diagnosis and analysis module, so that the diagnosis and analysis module can receive data acquired by the modules, and after calculation and analysis, the change condition of the temperature of the cable core wire when the cable is loaded with any dynamic current-carrying capacity and the longest sustainable time for loading a certain emergency load can be predicted.
The plurality of heat dissipation and temperature reduction modules comprise a plurality of low thermal resistance filling units 51 filled in the cable duct sections.
And a low-thermal-resistance filling unit is filled in the cable duct bank section with smaller current-carrying capacity, and the low-thermal-resistance filling unit is a low-thermal-resistance filling agent and is used for improving the heat dissipation condition and improving the current-carrying capacity. The cable pipe section is about 5 meters, the aperture of the calandria is large, the filling construction is easy to implement, the low-thermal-resistance filling agent is not solidified and hardened after filling, the service life of the material is more than 10 years, and the cleaning and the replacement are convenient after the material is invalid.
The low thermal resistance filling unit comprises a high thermal conductivity medium and a cooling medium.
The medium with higher heat conductivity coefficient can be filled in the cable duct bank, and the special cooling medium is filled in the electric pipeline, so that the heat dissipation condition around the cable is improved or forced cooling measures are added, the operating temperature of the cable is reduced, and the carrying capacity is improved.
The temperature control mechanism comprises a cooling mechanism 526 and a temperature sensing mechanism 527 connected with the cooling mechanism, the cooling mechanism is provided with cooling liquid, and the temperature sensing mechanism is in contact with the cooling liquid.
The temperature sensing mechanism can be a temperature sensor and is used for detecting the temperature of cooling liquid in the cooling mechanism, so that the temperature of the cooling liquid can be changed conveniently through the cooling mechanism, and the temperature control mechanism can control the temperature conveniently.
The cooling mechanism is used for heating or cooling the cooling liquid, and is convenient for changing the temperature of the cooling liquid according to the requirement.
Example two:
as shown in fig. 2 and 4, a 220 kv cable dynamic capacity increasing system includes:
the optical fiber temperature measuring modules 1 are used for detecting the temperature of the outer surface of the cable and the ambient temperature;
the point-to-point grid modules 2 are used for measuring the temperature of the cable at the pipe arranging opening;
the thermocouple modules 3 are used for detecting the soil temperature;
the sheath current modules 4 are used for collecting the real-time running current of the cable;
the plurality of heat dissipation and cooling modules 5 are used for improving the heat dissipation conditions around the cable or adding forced cooling measures;
and the diagnostic analysis module 6 is used for calculating the conductor temperature and the current-carrying capacity in real time.
The optical fiber temperature measurement module is a temperature measurement optical fiber, the outer surface of the cable is subjected to temperature measurement in an optical fiber temperature measurement mode, and the two-circuit cable line is wound with the temperature measurement optical fiber in a full-line mode. As the optical fiber in the calandria cannot be tightly attached to the surface of the cable, the cable at the calandria port is provided with the dot-shaped grating module for temperature measurement. The environment temperature adopts the mode of optical fiber temperature measurement and thermocouple, the thermocouple module is buried in the soil of the calandria section for temperature measurement, and the temperature measurement optical fiber is laid on the cable trench wall, namely the optical fiber temperature measurement module.
The real-time load current of the power cable is another key factor for calculating the current-carrying capacity, the real-time current value in the cable conductor is obtained through the sheath current module, and the real-time calculation of the current-carrying capacity of the cable is carried out by combining the optical fiber temperature measuring module.
The diagnosis and analysis module calculates the real-time conductor temperature and the current-carrying capacity in a mode of establishing a calculation model, and predicts the change condition of the cable core wire temperature when the cable is loaded with any dynamic current-carrying capacity and the sustainable maximum time when a certain emergency load is loaded.
The plurality of optical fiber temperature measuring modules, the plurality of point voltage grating modules, the plurality of thermocouple modules, the plurality of sheath current modules and the plurality of heat dissipation and cooling modules are all connected with the diagnosis and analysis module.
The detection module and the heat dissipation and cooling module are connected with the diagnosis and analysis module, so that the diagnosis and analysis module can receive data acquired by the modules, and after calculation and analysis, the change condition of the temperature of the cable core wire when the cable is loaded with any dynamic current-carrying capacity and the longest sustainable time for loading a certain emergency load can be predicted.
The plurality of heat dissipation and cooling modules comprise a plurality of forced cooling circulation units 52, each forced cooling circulation unit comprises a circulation pump 521, a cooling box 522, a plurality of pipelines 523 arranged in a cable and a temperature control mechanism 524 used for controlling the circulation pump, the circulation pump and the temperature control mechanism are arranged in the cooling box, the circulation pump is connected with the two ends of the pipelines, and the two ends of each pipeline are provided with a switch valve port 525.
The pipeline is arranged in parallel at the top of each row pipe section, and the pipeline can be arranged in parallel at the top of each row pipe section, so that the environmental temperature of the cables of the row pipe sections can be controlled conveniently. Whether each row pipe section exceeds a set temperature threshold value is judged through the temperature control mechanism, if the temperature control mechanism starts the circulating pump when the temperature threshold value is exceeded, the cooling liquid in the cooling box circulates, the environmental temperature of the cable is reduced through forced circulation, and the carrying capacity is improved.
The switch valve port is used for controlling the circulation of cooling liquid, and the environmental temperature of cables of a plurality of row pipe sections can be controlled in a diversified mode. If a certain pipe section is in fault, the pipe section with the fault can be prevented from being fed by cooling liquid only by closing the switch valve port.
The low thermal resistance filling unit comprises a high thermal conductivity medium and a cooling medium.
The medium with higher heat conductivity coefficient can be filled in the cable duct bank, and the special cooling medium is filled in the electric pipeline, so that the heat dissipation condition around the cable is improved or forced cooling measures are added, the operating temperature of the cable is reduced, and the carrying capacity is improved.
The temperature control mechanism comprises a cooling mechanism 526 and a temperature sensing mechanism 527 connected with the cooling mechanism, the cooling mechanism is provided with cooling liquid, and the temperature sensing mechanism is in contact with the cooling liquid.
The temperature sensing mechanism can be a temperature sensor and is used for detecting the temperature of cooling liquid in the cooling mechanism, so that the temperature of the cooling liquid can be changed conveniently through the cooling mechanism, and the temperature control mechanism can control the temperature conveniently.
The cooling mechanism is used for heating or cooling the cooling liquid, and is convenient for changing the temperature of the cooling liquid according to the requirement.
Example three:
as shown in fig. 3 and 4, a 220 kv cable dynamic capacity increasing system includes:
the optical fiber temperature measuring modules 1 are used for detecting the temperature of the outer surface of the cable and the ambient temperature;
the point-to-point grid modules 2 are used for measuring the temperature of the cable at the pipe arranging opening;
the thermocouple modules 3 are used for detecting the soil temperature;
the sheath current modules 4 are used for collecting the real-time running current of the cable;
the plurality of heat dissipation and cooling modules 5 are used for improving the heat dissipation conditions around the cable or adding forced cooling measures;
and the diagnostic analysis module 6 is used for calculating the conductor temperature and the current-carrying capacity in real time.
The optical fiber temperature measurement module is a temperature measurement optical fiber, the outer surface of the cable is subjected to temperature measurement in an optical fiber temperature measurement mode, and the two-circuit cable line is wound with the temperature measurement optical fiber in a full-line mode. As the optical fiber in the calandria cannot be tightly attached to the surface of the cable, the cable at the calandria port is provided with the dot-shaped grating module for temperature measurement. The environment temperature adopts the mode of optical fiber temperature measurement and thermocouple, the thermocouple module is buried in the soil of the calandria section for temperature measurement, and the temperature measurement optical fiber is laid on the cable trench wall, namely the optical fiber temperature measurement module.
The real-time load current of the power cable is another key factor for calculating the current-carrying capacity, the real-time current value in the cable conductor is obtained through the sheath current module, and the real-time calculation of the current-carrying capacity of the cable is carried out by combining the optical fiber temperature measuring module.
The diagnosis and analysis module calculates the real-time conductor temperature and the current-carrying capacity in a mode of establishing a calculation model, and predicts the change condition of the cable core wire temperature when the cable is loaded with any dynamic current-carrying capacity and the sustainable maximum time when a certain emergency load is loaded.
The plurality of optical fiber temperature measuring modules, the plurality of point voltage grating modules, the plurality of thermocouple modules, the plurality of sheath current modules and the plurality of heat dissipation and cooling modules are all connected with the diagnosis and analysis module.
The detection module and the heat dissipation and cooling module are connected with the diagnosis and analysis module, so that the diagnosis and analysis module can receive data acquired by the modules, and after calculation and analysis, the change condition of the temperature of the cable core wire when the cable is loaded with any dynamic current-carrying capacity and the longest sustainable time for loading a certain emergency load can be predicted.
The plurality of heat dissipation and cooling modules comprise a plurality of low-thermal resistance filling units 51 filled in the cable row pipe sections and a plurality of forced cooling circulation units 52, each forced cooling circulation unit comprises a circulation pump 521, a cooling tank 522, a plurality of pipelines 523 arranged in the cable and a temperature control mechanism 524 used for controlling the circulation pump, the circulation pump and the temperature control mechanism are arranged in the cooling tank, the circulation pumps are connected with the two ends of the pipelines, and the two ends of the pipelines are both provided with switch valve ports 525.
And a low-thermal-resistance filling unit is filled in the cable duct bank section with smaller current-carrying capacity, and the low-thermal-resistance filling unit is a low-thermal-resistance filling agent and is used for improving the heat dissipation condition and improving the current-carrying capacity. The cable pipe section is about 5 meters, the aperture of the calandria is large, the filling construction is easy to implement, the low-thermal-resistance filling agent is not solidified and hardened after filling, the service life of the material is more than 10 years, and the cleaning and the replacement are convenient after the material is invalid.
The pipeline is arranged in parallel at the top of each row pipe section, and the pipeline can be arranged in parallel at the top of each row pipe section, so that the environmental temperature of the cables of the row pipe sections can be controlled conveniently. Whether each row pipe section exceeds a set temperature threshold value is judged through the temperature control mechanism, if the temperature control mechanism starts the circulating pump when the temperature threshold value is exceeded, the cooling liquid in the cooling box circulates, the environmental temperature of the cable is reduced through forced circulation, and the carrying capacity is improved.
The switch valve port is used for controlling the circulation of cooling liquid, and the environmental temperature of cables of a plurality of row pipe sections can be controlled in a diversified mode. If a certain pipe section is in fault, the pipe section with the fault can be prevented from being fed by cooling liquid only by closing the switch valve port.
The heat dissipation and cooling module can be combined with the advantages of the low-thermal-resistance filling unit and the forced cooling circulation unit and arranged in the cable duct bank section, so that the heat dissipation condition around the cable can be effectively improved or the forced cooling is increased.
The low thermal resistance filling unit comprises a high thermal conductivity medium and a cooling medium.
The medium with higher heat conductivity coefficient can be filled in the cable duct bank, and the special cooling medium is filled in the electric pipeline, so that the heat dissipation condition around the cable is improved or forced cooling measures are added, the operating temperature of the cable is reduced, and the carrying capacity is improved.
The temperature control mechanism comprises a cooling mechanism 526 and a temperature sensing mechanism 527 connected with the cooling mechanism, the cooling mechanism is provided with cooling liquid, and the temperature sensing mechanism is in contact with the cooling liquid.
The temperature sensing mechanism can be a temperature sensor and is used for detecting the temperature of cooling liquid in the cooling mechanism, so that the temperature of the cooling liquid can be changed conveniently through the cooling mechanism, and the temperature control mechanism can control the temperature conveniently.
The cooling mechanism is used for heating or cooling the cooling liquid, and is convenient for changing the temperature of the cooling liquid according to the requirement.
It should be understood that this example is only for illustrating the present invention and is not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Claims (8)
1. The utility model provides a 220 kilovolt cable developments increase capacity system, its characterized in that, is used for improving the heat dissipation cooling module (5) and the diagnostic analysis module (6) of cable surrounding heat dissipation condition and/or increase compulsory cooling measure including a plurality of optic fibre temperature measurement module (1), a plurality of point volt grating module (2), a plurality of thermocouple module (3), a plurality of sheath current module (4), a plurality of optic fibre temperature measurement module (1), a plurality of point volt grating module (2), a plurality of thermocouple module (3), a plurality of sheath current module (4) and a plurality of heat dissipation cooling module (5) all with diagnostic analysis module (6) are connected.
2. The 220 kV cable dynamic capacity increasing system as claimed in claim 1, wherein the plurality of heat dissipation and temperature reduction modules (5) comprise a plurality of low thermal resistance filling units (51) filled in the cable duct sections.
3. The 220 kV cable dynamic capacity increasing system according to claim 1, wherein the plurality of heat dissipation and temperature reduction modules (5) comprise a plurality of forced cooling circulation units (52).
4. The 220 KV cable dynamic capacity increasing system of claim 1, wherein the plurality of heat dissipation and temperature reduction modules (5) comprise a plurality of low-thermal-resistance filling units (51) filled in cable sections and a plurality of forced cooling circulation units (52).
5. The 220 kV cable dynamic capacity increasing system according to claim 3 or 4, wherein the forced cooling circulation unit (52) comprises a circulation pump (521), a cooling tank (522), a plurality of pipelines (523) arranged in the cable, and a temperature control mechanism (524) for controlling the circulation pump (521), the circulation pump (521) and the temperature control mechanism (524) are arranged in the cooling tank (522), and the circulation pump (521) is connected with two ends of the pipelines (523).
6. The 220 KV cable dynamic capacity increasing system of claim 5, wherein switch valve ports (525) are arranged at two ends of a plurality of pipelines (523).
7. The 220 kV cable dynamic capacity augmentation system according to claim 2 or 4, wherein the low thermal resistance filling unit (51) comprises a high thermal conductivity medium and a cooling medium.
8. The dynamic capacity augmentation system for 220 kilovolt cables as claimed in claim 6, wherein said temperature control mechanism (524) comprises a cooling mechanism (526) and a temperature sensing mechanism (527) connected to said cooling mechanism (526), said cooling mechanism (526) being provided with a cooling liquid, said temperature sensing mechanism (527) contacting said cooling liquid.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121932114.1U CN216144932U (en) | 2021-08-16 | 2021-08-16 | 220 kilovolt cable dynamic capacity-increasing system |
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| CN202121932114.1U CN216144932U (en) | 2021-08-16 | 2021-08-16 | 220 kilovolt cable dynamic capacity-increasing system |
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