CN112147392A - High-voltage cable dynamic capacity increasing system and method - Google Patents
High-voltage cable dynamic capacity increasing system and method Download PDFInfo
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- CN112147392A CN112147392A CN202010899943.8A CN202010899943A CN112147392A CN 112147392 A CN112147392 A CN 112147392A CN 202010899943 A CN202010899943 A CN 202010899943A CN 112147392 A CN112147392 A CN 112147392A
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
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- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention relates to a high-voltage cable dynamic capacity increasing system and a method, the high-voltage cable dynamic capacity increasing system comprises refrigeration equipment, cooling liquid driving equipment, cooling equipment, a temperature sensing system, a current collecting system and a control system, the cooling equipment is wrapped outside a high-voltage cable, the temperature sensing system is connected into the cooling equipment to collect the temperature of a cooling section of the high-voltage cable, two ends of the cooling equipment are connected with the cooling liquid driving equipment, the cooling liquid driving equipment is connected with the refrigeration equipment, the current collecting system is arranged outside the high-voltage cable, the control system is connected with the refrigeration equipment, the cooling liquid driving equipment, the temperature sensing system and the current collecting system, the control system controls the starting of the refrigeration equipment and the adjustment of the conveying capacity of the cooling liquid driving equipment according to the acquired current value and the environmental temperature value of the high-voltage cable, the input cooling liquid temperature of the cooling equipment and the output, and dynamic capacity increasing of the high-voltage cable is realized.
Description
Technical Field
The invention belongs to the technical field of high voltage electricity and automatic control equipment, and particularly relates to a high-voltage cable dynamic capacity increasing system and a high-voltage cable dynamic capacity increasing method.
Background
With the implementation of power grid transformation, especially the continuous deepening of urban network transformation and construction, the use amount of power cables is greatly increased, and the underground cabling rate of urban central areas is continuously improved. Although the demand of people for electric power is increasing, the construction of new power transmission and distribution lines is becoming more and more difficult due to various limitations of environmental protection, capital, space and the like. The underground cable is a bottleneck of power transmission, and in order to improve the transmission capability of the existing power transmission line, the transmission potential of the existing power cable must be considered under the premise of ensuring the operation safety.
In order to guarantee the service life of the cable and prevent the cable from overheating faults, the maximum allowable current-carrying capacity (also called rated current-carrying capacity) of the cable is set. The transmission capacity of the cable can be improved by adopting higher allowable temperature, but after the temperature is improved, the loss of the cable is increased, the thermal aging of the insulation is greatly accelerated, the service life of the cable is shortened, and the cable is not reasonable economically in the long run. Therefore, during operation, on one hand, the cable is ensured to safely and reliably operate within an allowable range; on the other hand, the transmission capacity of the cable should be used reasonably and sufficiently to ensure the economic operation of the cable line. At present, most of cables run under a lower load state, the lifting space is large, but the real-time accurate monitoring of the temperature of a cable conductor is lacked, and the service efficiency of the cables is difficult to improve to the maximum extent under the condition of ensuring the safe running of the cables.
In the daily operation and maintenance of the power management department, when the power management department often faces the situations of cable faults or emergency power supply (meeting the peak and going to summer) requirements and the like, the power management department often adopts the modes of brake-pulling power limiting, power failure maintenance and the like, the production of local enterprises and the life of people are influenced, and some negative influences are brought to the society. Dynamic capacity expansion studies can solve the troublesome problem faced in this practice for the power management sector.
How to improve the current-carrying capacity transmission capacity of the cable under the existing cable resource condition can not only solve the long-term low-load operation of the cable and improve the cable transmission capacity, but also solve the problem of brake-off and power-limiting caused by operation, maintenance and rush-repair of a dispatching department, thus improving the power quality and responding to the national low-carbon and environment-friendly policies.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a high-voltage cable dynamic capacity increasing system and a method, wherein refrigeration and cooling equipment, a temperature sensor, a current acquisition and control system and the like are arranged, and the control system can control the starting of the refrigeration equipment and the adjustment of the conveying capacity of cooling liquid driving equipment according to the current value, the ambient temperature value, the temperature of cooling liquid input by the cooling equipment and the temperature of cooling liquid output by the cooling equipment, so that the dynamic capacity increasing of the high-voltage cable is realized.
In order to achieve the above object, the present invention adopts the following technical solutions.
The invention firstly provides a high-voltage cable dynamic capacity increasing system, which comprises refrigeration equipment, cooling liquid driving equipment, cooling equipment, a temperature sensing system, a current collecting system and a control system, wherein the refrigeration equipment is connected with the cooling liquid driving equipment;
the cooling equipment is wrapped outside the high-voltage cable;
the temperature sensing system is connected into the cooling equipment to acquire the temperature of the cooling section of the high-voltage cable;
two ends of the cooling equipment are connected with cooling liquid driving equipment;
the cooling liquid driving device is connected with a refrigerating device;
the current acquisition system is arranged on the outer side of the high-voltage cable;
the control system is connected with the refrigeration equipment, the cooling liquid driving equipment, the temperature sensing system and the current collecting system, and controls the starting of the refrigeration equipment and the adjustment of the conveying capacity of the cooling liquid driving equipment according to the acquired current value of the high-voltage cable, the ambient temperature value, the input cooling liquid temperature of the cooling equipment and the output cooling liquid temperature of the cooling equipment.
Preferably, the cooling device comprises two half shells which can be assembled in a matching manner, the two half shells are provided with air guide strips, the two half shells form a closed pipeline which is externally wrapped on the outer side of the high-voltage cable after being assembled on the outer side of the high-voltage cable, and the two ends of the pipeline are respectively provided with an air inlet and an air outlet.
In any one of the above technical solutions, preferably, the air inlet and the air outlet of the cooling device are respectively connected with the input end and the output end of the cooling liquid driving device through pipe fittings.
In any of the above technical solutions, preferably, the temperature sensing system includes a multi-point bus communication temperature sensor, the multi-point bus communication temperature sensor includes an inflow temperature sensor, an outflow temperature sensor and an ambient temperature sensor, and is used for acquiring the input temperature of the cooling device, the output temperature of the cooling device and acquiring the ambient temperature.
In any of the above technical solutions, preferably, the inflow temperature sensor and the outflow temperature sensor are respectively disposed at the air inlet and the air outlet of the cooling device and connected to the control system.
In any of the above technical solutions, preferably, the ambient temperature sensor is disposed in the refrigeration equipment and connected to the control system.
In any of the above technical solutions, it is preferable that the temperature sensing system further includes an optical fiber temperature sensor, and the optical fiber temperature sensor is disposed on the high-voltage cable and connected to the control system, and is configured to monitor the temperature of the entire section of the high-voltage cable and the skin temperature T1 of the high-voltage cable.
In any of the above technical solutions, it is preferable that the coolant driving device has a liquid cooling function and an air cooling function, and has a high and low delivery capacity.
In any of the above technical solutions, preferably, the refrigeration equipment includes an air compressor, a radiator, a condenser, and a cold air supercharger.
In any of the above technical solutions, preferably, the current collecting system obtains the current of the high-voltage cable by using a CT current transformer.
The invention also provides a high-voltage cable dynamic capacity increasing method according to the high-voltage cable dynamic capacity increasing system, which comprises the following steps: in the power grid, the cooling equipment is wrapped outside the high-voltage cable, the cooling liquid driving equipment conveys cooling liquid or wind power to the cooling equipment, the refrigeration equipment utilizes an air compressor of the refrigeration equipment to discharge heat energy to the air, the temperature sensing system collects the temperature of a cooling section of the high-voltage cable and the inflow temperature of the cooling liquid in the cooling equipment, the outflow temperature of the cooling liquid and the ambient temperature, the current collecting system collects the current estimation temperature rise of the current dynamic capacity-increasing cable, and the control system controls the starting of the refrigeration equipment and the adjustment of the conveying capacity of the cooling liquid driving equipment according to the obtained current value of the high-voltage cable, the ambient temperature value, the input cooling liquid temperature of the cooling equipment and the output cooling liquid temperature of the cooling.
Preferably, the current acquisition system comprises a CT current transformer, the heating power of the cable is determined according to the current value of the high-voltage cable measured by the CT current transformer, the calculated values of the core wire temperature and the skin temperature of the cable are determined according to the heating power of the cable and the thermal resistance of the cable, and the refrigeration control is realized by calculating the set value of the skin temperature;
according to P ═ I ^ 2RResistance (RC)Calculating cable heatingPower, obtaining cable thermal resistance R thermal resistance according to cable characteristics and experimental data, wherein the relation between heating power P and thermal resistance is
P = RThermal resistance*（T2-T1），
Wherein T1 is the temperature of the skin of the cable, T2 is the temperature of the core of the cable, and the working temperature Tmax of the maximum bearing temperature of the cable is set;
neither T2 nor T1 should be greater than Tmax;
if T2 = Tmax, T1 = Tmax-P/R is deducedThermal resistance；
Then carries P ═ I ^ 2RResistance (RC)，
T1= Tmax - I＾2RResistance (RC) / RThermal resistanceAnd the temperature is lower than that of the closed refrigeration equipment when the refrigeration equipment is started corresponding to the temperature of the traditional skin, so that the refrigeration equipment is more scientific and accurate.
Preferably, the temperature sensing system comprises an optical fiber temperature measuring sensor and a multi-point bus communication temperature sensor, the optical fiber temperature measuring sensor measures the interval temperature of the whole cooling cable, if any interval temperature is higher than a system set value, the cooling control is started, and the output power of the cooling equipment is controlled through the temperature difference value of the ambient temperature sensor and the air outlet of the cooling equipment, so that variable-frequency refrigeration is realized.
Preferably, the temperature sensing system comprises a multi-point bus communication temperature sensor, the multi-point bus communication temperature sensor is used for acquiring the temperature difference between the air outlet and the air inlet of the cooling equipment, and the power of the cooling liquid driving equipment is adjusted according to the temperature difference; the larger the difference is, the larger the power of the cooling liquid driving equipment is; and if the temperature difference is small, the cooling liquid driving device adjusts the power to save energy consumption.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
the high-voltage cable dynamic capacity increasing system is composed of refrigeration equipment, cooling liquid driving equipment, cooling equipment, a temperature sensing system, a current collecting system and a control system, wherein the refrigeration equipment discharges heat energy into air by using an air compressor, the cooling liquid driving equipment is responsible for conveying cooling liquid or wind power to the cooling equipment, the conveying capacity can be improved or reduced according to the requirement of the cooling control system, the temperature sensing system is responsible for collecting the temperature of a cooling section of the high-voltage cable, the inflow temperature, the outflow temperature and the ambient temperature of the cooling liquid in the cooling equipment, the current collecting system is used for collecting the current of the current dynamic capacity increasing cable to estimate the temperature rise, the control system is used for controlling the starting of the refrigeration equipment and the adjustment of the conveying capacity of the cooling liquid driving equipment according to the current value, the ambient temperature value, the temperature of the cooling equipment input cooling liquid temperature, the current-carrying capacity of the cable can be improved under the condition of the existing cable resources, long-term low-load operation of the cable is solved, the cable transmission capacity is improved, the problem that a dispatching department pulls out and limits the power due to operation, maintenance and rush repair is effectively solved, the power quality is improved, the national low-carbon and environment-friendly policy is responded, and contribution is made to social development.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic system structure diagram of a preferred embodiment of the dynamic compatibilization system for high-voltage cables according to the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to overcome the problem of insufficient cable transmission capacity in the current power grid and improve the cable transmission capacity, the embodiment of the invention provides a high-voltage cable dynamic capacity increasing system and a high-voltage cable dynamic capacity increasing method.
The characteristics, principles and implementation forms of the dynamic capacity increasing technology for the high voltage cable described in this embodiment are described below with reference to fig. 1.
The dynamic capacity increasing system of the high-voltage cable mainly comprises refrigeration equipment, cooling liquid driving equipment, cooling equipment, a temperature sensing system, a current collecting system and a control system, wherein the cooling equipment is wrapped outside the high-voltage cable, the temperature sensing system is connected into the cooling equipment to collect the temperature of a cooling section of the high-voltage cable, two ends of the cooling equipment are connected with the cooling liquid driving equipment, the cooling liquid driving equipment is connected with the refrigeration equipment, the current collecting system is arranged outside the high-voltage cable, the control system is connected with the refrigeration equipment, the control system controls the starting of the refrigeration equipment and the adjustment of the conveying capacity of the cooling liquid driving equipment according to the acquired current value of the high-voltage cable, the acquired environmental temperature value, the acquired input cooling liquid temperature of the cooling equipment and the acquired output cooling liquid temperature of the cooling equipment, so that the dynamic capacity increasing of the high-voltage cable is realized.
In this embodiment, the cooling device may be formed by two half shells that can be assembled in a matching manner, the two half shells are provided with the air guide strip, the two half shells form a closed pipeline that is externally wrapped on the outside of the high-voltage cable after being assembled on the outside of the high-voltage cable, and the two ends of the pipeline are respectively provided with the air inlet and the air outlet.
In this embodiment, the air inlet and the air outlet of the cooling device are respectively connected with the input end and the output end of the cooling liquid driving device through pipe fittings.
In this embodiment, temperature sensing system includes multiple spot bus communication temperature sensor, multiple spot bus communication temperature sensor includes inflow temperature sensor, outflow temperature sensor and ambient temperature sensor for gather cooling device input temperature, cooling device output temperature and gather ambient temperature.
In this embodiment, the inflow temperature sensor and the outflow temperature sensor are respectively disposed at the air inlet and the air outlet of the cooling device and connected to the control system.
In this embodiment, the ambient temperature sensor is disposed in the refrigeration equipment and connected to the control system.
In this embodiment, the temperature sensing system further includes an optical fiber temperature sensor, and the optical fiber temperature sensor is disposed on the high-voltage cable and connected to the control system, and is configured to monitor the temperature of the entire high-voltage cable and the skin temperature T1 of the high-voltage cable.
In the present embodiment, the coolant drive device has a liquid cooling function and a wind cooling function, and has a high and low adjustable delivery capacity.
In this embodiment, the refrigeration apparatus includes an air compressor, a radiator, a condenser, and a cold-air supercharger.
In this embodiment, the refrigeration device can adjust the refrigeration power, the coolant driving device can adjust the transmission power, and the temperature sensing system mainly comprises an optical fiber temperature measurement system and a dot matrix bus temperature measurement system. The current acquisition system adopts a CT current transformer to acquire cable current, and can also directly acquire cable current data from a third-party cable system.
The dynamic capacity increasing system for the high-voltage cable is suitable for the single-core cable or the multi-core cable.
In this embodiment, a high voltage cable dynamic capacity increasing system is composed of a refrigeration device, a cooling liquid driving device, a cooling device, a temperature sensing system, a current collecting system and a control system, wherein the refrigeration device uses an air compressor to discharge heat energy into air, the cooling liquid driving device is responsible for conveying cooling liquid or wind power to the cooling device, and can increase or decrease conveying capacity according to the requirement of the cooling control system, the temperature sensing system is responsible for collecting temperature of a cooling section of the high voltage cable, inflow temperature, outflow temperature and ambient temperature of the cooling liquid in the cooling device, the current collecting system is responsible for collecting current of the current dynamic capacity increasing cable to estimate temperature rise, the control system controls the start of the refrigeration device and the adjustment of the conveying capacity of the cooling liquid driving device according to current value, ambient temperature value, input cooling liquid temperature of the cooling device, output cooling liquid temperature, the dynamic capacity increasing of the high-voltage cable is realized, so that the current-carrying capacity of the cable can be improved under the condition of the existing cable resources, the long-term low-load operation of the cable is solved, the cable conveying capacity is improved, the problem of brake-off and power-limiting caused by operation, maintenance and rush-repair of a dispatching department is effectively solved, the power quality is improved, and the national low-carbon and environment-friendly policy is responded.
In a power grid, the method for realizing the dynamic capacity increase of the high-voltage cable by adopting the dynamic capacity increase system of the high-voltage cable of the embodiment comprises the following steps:
the method comprises the steps that cooling equipment is wrapped outside a high-voltage cable, cooling liquid or wind power is conveyed to the cooling equipment by cooling liquid driving equipment, the refrigeration equipment utilizes an air compressor of the refrigeration equipment to discharge heat energy into air, a temperature sensing system collects the temperature of a cooling section of the high-voltage cable and the inflow temperature of the cooling liquid, the outflow temperature of the cooling liquid and the ambient temperature in the cooling equipment, a current collection system collects the current estimation temperature rise of the current dynamic capacity-increasing cable, and a control system controls the starting of the refrigeration equipment and the adjustment of the conveying capacity of the cooling liquid driving equipment according to the obtained current value of the high-voltage cable, the ambient temperature value, the input cooling liquid temperature of the cooling equipment and the output cooling liquid temperature of.
In the specific implementation process, three sets of control forms can be developed and designed according to the method.
The first set of control system and method:
the current acquisition system comprises a CT current transformer, the heating power of the cable is determined according to the current value of the high-voltage cable measured by the CT current transformer, the calculated values of the core wire temperature and the skin temperature of the cable are determined according to the heating power of the cable and the thermal resistance of the cable, and the refrigeration control is realized by calculating the set value of the skin temperature.
According to P ═ I ^ 2RResistance (RC)Calculating the heating power of the cable, obtaining the thermal resistance R of the cable according to the characteristics of the cable and experimental data, wherein the relation between the heating power P and the thermal resistance is P = RThermal resistance*（T2-T1）Wherein T1 is the temperature of the cable skin, T2 is the temperature of the cable core, and the working temperature Tmax of the maximum bearing temperature of the cable is determined;
neither T2 nor T1 should be greater than Tmax;
if T2 = Tmax, T1 = Tmax-P/R is deducedThermal resistance；
Then carries P ═ I ^ 2RResistance (RC)，T1= Tmax - I＾2RResistance (RC) / RThermal resistance，
The temperature of the corresponding traditional skin is lower than that of the refrigeration equipment which is closed when the refrigeration equipment is opened, so that the refrigeration equipment is more scientific and accurate.
The second set of control system and method:
the temperature sensing system comprises an optical fiber temperature sensor and a multi-point bus communication temperature sensor, the optical fiber temperature sensor measures the interval temperature of the whole section of the cooling cable, if any interval temperature is higher than a system set value, the cooling control is started, and the output power of the cooling equipment is controlled through the temperature difference value of the air outlet of the environment temperature sensor and the air outlet of the cooling equipment, so that the variable-frequency refrigeration is realized.
The third set of control system and method:
the temperature sensing system comprises a multi-point bus communication temperature sensor, the multi-point bus communication temperature sensor is used for acquiring the temperature difference between the air outlet and the air inlet of the cooling equipment, and the power of the cooling liquid driving equipment is adjusted according to the temperature difference; the larger the difference is, the larger the power of the cooling liquid driving equipment is; and if the temperature difference is small, the cooling liquid driving device adjusts the power to save energy consumption.
The three sets of control systems specially designed for dynamic capacity increase of the high-voltage cable are used for controlling a cooling system, and for the three sets of schemes, the thermal resistance R of the high-voltage cable is provided by a cable manufacturer or is obtained according to experiments; the cooling threshold value of the high-voltage cable is calculated and set by the cable current, and compared with a traditional technology which only measures a skin temperature measuring system, the technology of the embodiment better protects the temperature of the wire core. T1 is cable skin temperature, and when the cable skin temperature is higher than the calculated value, the refrigeration equipment and the cooling liquid driving equipment need to be started. The control system collects the input temperature and the output temperature of the cooling equipment, collects the ambient temperature at the same time, the output temperature and the ambient temperature control the starting power of the refrigeration equipment, and the difference between the ambient temperature and the output temperature of the cooling equipment is large, so that the starting power of the refrigeration equipment is high. If the difference between the input temperature and the output temperature of the cooling equipment is large, the power of the cooling liquid driving equipment is improved, and the circulation of cold cutting liquid is accelerated. The temperature sensor consists of an optical fiber temperature measuring sensor and a multi-point bus communication temperature sensor. The optical fiber temperature measuring sensor monitors the temperature of the whole section of cable and the temperature T1 of the skin of the cable. Preventing zone temperature differences. The multi-point bus communication temperature sensor collects the ambient temperature, and the input temperature and the output temperature of the cooling equipment.
The foregoing is merely illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention; the above description is only for the specific embodiment of the present invention, and is not intended to limit the scope of the present invention; any modification, equivalent replacement, improvement and the like of the technical solution of the present invention by a person of ordinary skill in the art without departing from the design spirit of the present invention shall fall within the protection scope determined by the claims of the present invention.
Claims (10)
1. A high-voltage cable dynamic capacity increasing system comprises a control system and is characterized by further comprising refrigeration equipment, cooling liquid driving equipment, cooling equipment, a temperature sensing system and a current collecting system; the cooling device outsourcing is in the high tension cable outside, the temperature of gathering high tension cable cooling district section in the temperature sensing system inserts the cooling device, the both ends of cooling device are connected with coolant liquid drive device, refrigeration plant is connected to coolant liquid drive device, current acquisition system device is in the high tension cable outside, control system connects refrigeration plant, coolant liquid drive device, temperature sensing system, current acquisition system, control system controls the start-up of refrigeration plant and the adjustment of coolant liquid drive device conveying capacity according to the input coolant temperature of the current value of the high tension cable who obtains, ambient temperature value, cooling device, the output coolant temperature of cooling device.
2. The dynamic capacity increasing system for the high-voltage cable as claimed in claim 1, wherein the cooling device comprises two half shells which are adapted to be assembled, the two half shells are respectively provided with an air guide strip, the two half shells form a closed pipeline which is wrapped outside the high-voltage cable after being assembled outside the high-voltage cable, and two ends of the pipeline are respectively provided with an air inlet and an air outlet.
3. The dynamic capacity increasing system for the high-voltage cable according to claim 2, wherein the air inlet and the air outlet of the temperature reducing device are respectively connected with the input end and the output end of the cooling liquid driving device through pipe fittings.
4. The high voltage cable dynamic compatibilization system of claim 1, wherein said temperature sensing system comprises a multi-drop bus communication temperature sensor comprising an inflow temperature sensor, an outflow temperature sensor, and an ambient temperature sensor for acquiring a cooling device input temperature, a cooling device output temperature, and acquiring an ambient temperature.
5. The dynamic capacity increasing system for the high-voltage cable according to claim 4, wherein the inflow temperature sensor and the outflow temperature sensor are respectively arranged at an air inlet and an air outlet of the temperature reducing device and are connected with the control system.
6. The high voltage cable dynamic compatibilization system of claim 4, wherein said ambient temperature sensor is disposed in the refrigeration equipment and connected to the control system.
7. The dynamic capacity increasing system for the high-voltage cable according to claim 4, wherein the temperature sensing system further comprises an optical fiber temperature sensor, the optical fiber temperature sensor is disposed on the high-voltage cable and connected to the control system for monitoring the temperature of the entire section of the high-voltage cable and the skin temperature T1 of the high-voltage cable.
8. The high-voltage cable dynamic capacity increasing system of claim 1, wherein the cooling liquid driving device has liquid cooling and wind cooling functions and has adjustable conveying capacity.
9. The high voltage cable dynamic compatibilization system of claim 1, wherein said refrigeration equipment comprises an air compressor, a heat sink, a condenser, and a cold air supercharger.
10. Method for the dynamic compatibilization of a high voltage cable of a dynamic compatibilization system for high voltage cables according to any one of claims 1 to 9, characterized in that it comprises: in the power grid, the cooling equipment is wrapped outside the high-voltage cable, the cooling liquid driving equipment conveys cooling liquid or wind power to the cooling equipment, the refrigeration equipment utilizes an air compressor of the refrigeration equipment to discharge heat energy to the air, the temperature sensing system collects the temperature of a cooling section of the high-voltage cable and the inflow temperature of the cooling liquid in the cooling equipment, the outflow temperature of the cooling liquid and the ambient temperature, the current collecting system collects the current estimation temperature rise of the current dynamic capacity-increasing cable, and the control system controls the starting of the refrigeration equipment and the adjustment of the conveying capacity of the cooling liquid driving equipment according to the obtained current value of the high-voltage cable, the ambient temperature value, the input cooling liquid temperature of the cooling equipment and the output cooling liquid temperature of the cooling.
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| CN113064365A (en) * | 2021-03-04 | 2021-07-02 | 国网浙江省电力有限公司嘉兴供电公司 | Power transmission and transformation circuit microenvironment dynamic monitoring system based on internet of things technology |
| CN113109640A (en) * | 2021-03-04 | 2021-07-13 | 国网浙江省电力有限公司嘉兴供电公司 | Power line intelligent dynamic capacity increasing system and method based on pre-simulation |
| CN113109384A (en) * | 2021-03-04 | 2021-07-13 | 国网浙江省电力有限公司嘉兴供电公司 | Power transmission and transformation hybrid line dynamic capacity increase evaluation method and system |
| CN113188682A (en) * | 2021-06-01 | 2021-07-30 | 中广核新能源六安有限公司 | Automatic temperature measurement protection device for cable joint on high-voltage side of box-type substation |
| CN113611451A (en) * | 2021-07-27 | 2021-11-05 | 湖北工业大学 | Cable cooling device |
| CN113764133A (en) * | 2021-08-16 | 2021-12-07 | 国网浙江省电力有限公司湖州供电公司 | Dynamic capacity increasing system and method for 220 KV cable |
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| CN113109384B (en) * | 2021-03-04 | 2022-10-11 | 国网浙江省电力有限公司嘉兴供电公司 | Dynamic capacity increase evaluation method for power transmission and transformation hybrid line |
| CN113188682A (en) * | 2021-06-01 | 2021-07-30 | 中广核新能源六安有限公司 | Automatic temperature measurement protection device for cable joint on high-voltage side of box-type substation |
| CN113611451A (en) * | 2021-07-27 | 2021-11-05 | 湖北工业大学 | Cable cooling device |
| CN113611451B (en) * | 2021-07-27 | 2023-01-03 | 湖北工业大学 | Cable cooling device |
| CN113764133A (en) * | 2021-08-16 | 2021-12-07 | 国网浙江省电力有限公司湖州供电公司 | Dynamic capacity increasing system and method for 220 KV cable |
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