CN105302181A - Electric power tunnel cable temperature control system and method - Google Patents
Electric power tunnel cable temperature control system and method Download PDFInfo
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- CN105302181A CN105302181A CN201510731506.4A CN201510731506A CN105302181A CN 105302181 A CN105302181 A CN 105302181A CN 201510731506 A CN201510731506 A CN 201510731506A CN 105302181 A CN105302181 A CN 105302181A
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Abstract
The invention relates to an electric power tunnel cable temperature control system and method. The system includes current transformers, a control cabinet, a tunnel fan and temperature sensors, the plurality of current transformers and temperature sensors are hooped on an electric power tunnel cable through ferrules, the control cabinet is connected with the current transformers and the tunnel fan, the tunnel fan is arranged at a tunnel portal, and the inside of the electric power tunnel is ventilated through a ventilation duct. Compared with the prior art, the electric power tunnel cable temperature control system provided by the invention has the advantages of prejudgment, good effect and the like.
Description
Technical field
The present invention relates to power cable detection field, especially relate to a kind of power tunnel cable temperature control system and method.
Background technology
Power cable tunnel be hold number of cables more, have for install and make an inspection tour passage, Totally-enclosed-type underground structure.Be applicable to underground water table low, the electrical power mains line that cable line is comparatively concentrated, generally lay the power cable of more than 30.
Because row establishes many cables in power cable tunnel, operationally can produce a large amount of heats, when temperature is too high, the cable blower fan outside power cable tunnel will ventilate, and is taken away by the heat that cable produces, thus reduce the temperature of cable, but, because present cable temperature control system is the temperature of real-time monitoring cable, just carry out cooling process when cable temperature exceedes setting value, like this will be very passive, temperature can not lower fast.
Summary of the invention
Object of the present invention be exactly in order to overcome above-mentioned prior art exist defect and a kind of power tunnel cable temperature control system and method are provided.
Object of the present invention can be achieved through the following technical solutions:
A kind of power tunnel cable temperature control system, this system comprises current transformer, switch board, tunnel blower and temperature sensor, described current transformer and temperature sensor are equipped with multiple, respectively by cuff hoop in power tunnel cable, described switch board is connected with current transformer and tunnel blower respectively, described tunnel blower is arranged on tunnel face, by ventilation duct to electric power tunnel inner ventilation.
A kind of power tunnel cable temperature-controlled process, comprises the following steps:
1) obtain historical current amplitude and the temperature data of all cables in electric power tunnel, and draw current amplitude-hygrogram according to historical current amplitude and temperature data;
2) according to the delay value that current amplitude-hygrogram acquisition current amplitude and cable temperature change;
3) current threshold of every bar cable and corresponding ventilation time is set according to delay value;
4) when current transformer detects that the transmission current amplitude of cable exceedes current threshold, switch board opens tunnel blower according to the ventilation time set, and detects the cable temperature after ventilating by temperature sensor simultaneously.
Described current amplitude-hygrogram comprises current amplitude-time curve and temperature-time curve, described current amplitude-have time delay between time curve and temperature-time curve.
Described step 2) in the size of delay value determined by time delay.
Described step 4) further comprising the steps of:
Be in normal range when temperature sensor detects the cable temperature after ventilating, then after the ventilation time of setting terminates, close cable blower fan, exceed normal range when temperature sensor detects the cable temperature after ventilating, then extend the ventilation time of cable blower fan, until temperature is got back in normal range.
Compared with prior art, the present invention has the following advantages:
This method draws current amplitude-hygrogram according to historical data, and learn current amplitude-between time curve and temperature-time curve, there is time delay according to current amplitude-hygrogram, working time of blower fan according to this property settings, the temperature rise situation of anticipation cable is shifted to an earlier date according to current amplitude, thus ensure that the preference temperature of power cable tunnel, guarantee the normal operation of cable.
Accompanying drawing explanation
Fig. 1 is the current amplitude-hygrogram in embodiment,
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment:
A kind of power tunnel cable temperature control system, this system comprises current transformer, switch board, tunnel blower and temperature sensor, current transformer and temperature sensor are equipped with multiple, respectively by cuff hoop in power tunnel cable, switch board is connected with current transformer and tunnel blower respectively, tunnel blower is arranged on tunnel face, by ventilation duct to electric power tunnel inner ventilation.
A kind of power tunnel cable temperature-controlled process, comprises the following steps:
1) obtain historical current amplitude and the temperature data of all cables in electric power tunnel, and draw current amplitude-hygrogram according to historical current amplitude and temperature data;
2) as shown in Figure 1, according to the delay value that current amplitude-hygrogram acquisition current amplitude and cable temperature change, current amplitude-hygrogram comprises current amplitude-time curve and temperature-time curve, current amplitude-between time curve and temperature-time curve, there is time delay, the size of delay value is determined by time delay;
3) current threshold of every bar cable and corresponding ventilation time is set according to delay value;
4) when current transformer detects that the transmission current amplitude of cable exceedes current threshold, switch board opens tunnel blower according to the ventilation time set, detect the cable temperature after ventilating by temperature sensor simultaneously, be in normal range when temperature sensor detects the cable temperature after ventilating, then after the ventilation time of setting terminates, close cable blower fan, normal range is exceeded when temperature sensor detects the cable temperature after ventilating, then extend the ventilation time of cable blower fan, until temperature is got back in normal range.
The method of operation of native system is: current transformer hoop is on tunnel inner cable, real-time monitoring cable transmission current amplitude, utilize the delay effect of cable current and cable temperature rise, tunnel blower can be opened in advance by controller of fan, discharge the heat that tunnel inner cable loss sends in advance.Compared with prior art, there is anticipation in advance, early response, ensure the advantage that tunnel temperature is suitable.
Claims (5)
1. a power tunnel cable temperature control system, it is characterized in that, this system comprises current transformer, switch board, tunnel blower and temperature sensor, described current transformer and temperature sensor are equipped with multiple, respectively by cuff hoop in power tunnel cable, described switch board is connected with current transformer and tunnel blower respectively, and described tunnel blower is arranged on tunnel face, by ventilation duct to electric power tunnel inner ventilation.
2. application rights requires a control method for the power tunnel cable temperature control system described in 1, it is characterized in that, comprises the following steps:
1) obtain historical current amplitude and the temperature data of all cables in electric power tunnel, and draw current amplitude-hygrogram according to historical current amplitude and temperature data;
2) according to the delay value that current amplitude-hygrogram acquisition current amplitude and cable temperature change;
3) current threshold of every bar cable and corresponding ventilation time is set according to delay value;
4) when current transformer detects that the transmission current amplitude of cable exceedes current threshold, switch board opens tunnel blower according to the ventilation time set, and detects the cable temperature after ventilating by temperature sensor simultaneously.
3. a kind of power tunnel cable temperature-controlled process according to claim 2, it is characterized in that, described current amplitude-hygrogram comprises current amplitude-time curve and temperature-time curve, described current amplitude-have time delay between time curve and temperature-time curve.
4. a kind of power tunnel cable temperature-controlled process according to claim 3, is characterized in that, described step 2) in the size of delay value determined by time delay.
5. a kind of power tunnel cable temperature-controlled process according to claim 3, is characterized in that, described step 4) further comprising the steps of:
Be in normal range when temperature sensor detects the cable temperature after ventilating, then after the ventilation time of setting terminates, close cable blower fan, exceed normal range when temperature sensor detects the cable temperature after ventilating, then extend the ventilation time of cable blower fan, until temperature is got back in normal range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510731506.4A CN105302181B (en) | 2015-11-02 | 2015-11-02 | A kind of power tunnel cable temperature control system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510731506.4A CN105302181B (en) | 2015-11-02 | 2015-11-02 | A kind of power tunnel cable temperature control system and method |
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| Publication Number | Publication Date |
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| CN105302181A true CN105302181A (en) | 2016-02-03 |
| CN105302181B CN105302181B (en) | 2017-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510731506.4A Active CN105302181B (en) | 2015-11-02 | 2015-11-02 | A kind of power tunnel cable temperature control system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111062115A (en) * | 2019-11-08 | 2020-04-24 | 国网江苏省电力有限公司盐城供电分公司 | Ventilation system fan configuration method for electric power tunnel |
| CN113110257A (en) * | 2021-05-21 | 2021-07-13 | 武汉伏佳安达电气技术有限公司 | Intelligent monitoring system and method for electric power tunnel |
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| JP2006250689A (en) * | 2005-03-10 | 2006-09-21 | Tokyo Electric Power Co Inc:The | Cable conductor temperature estimation method considering movement of air in cable tunnel, cable conductor temperature estimation system, and cable conductor temperature estimation program |
| CN103235612A (en) * | 2013-03-27 | 2013-08-07 | 国家电网公司 | Device and method for intermittently ventilating cooling cable tunnel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111062115A (en) * | 2019-11-08 | 2020-04-24 | 国网江苏省电力有限公司盐城供电分公司 | Ventilation system fan configuration method for electric power tunnel |
| CN111062115B (en) * | 2019-11-08 | 2022-08-19 | 国网江苏省电力有限公司盐城供电分公司 | Ventilation system fan configuration method for electric power tunnel |
| CN113110257A (en) * | 2021-05-21 | 2021-07-13 | 武汉伏佳安达电气技术有限公司 | Intelligent monitoring system and method for electric power tunnel |
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| CN105302181B (en) | 2017-07-28 |
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