CN104360196A - Power transmission line dynamic capacity-increase system based on wire inclination angle - Google Patents
Power transmission line dynamic capacity-increase system based on wire inclination angle Download PDFInfo
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- CN104360196A CN104360196A CN201410652630.7A CN201410652630A CN104360196A CN 104360196 A CN104360196 A CN 104360196A CN 201410652630 A CN201410652630 A CN 201410652630A CN 104360196 A CN104360196 A CN 104360196A
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Abstract
The invention relates to a power transmission line dynamic capacity-increase system based on a wire inclination angle. The power transmission line dynamic capacity-increase system is technically characterized by being composed of a plurality of data collection terminals and a monitoring platform, each data collection terminal comprises a sensor, a conditioning circuit of the sensor, a CT electricity supply module, a main control module and a wireless data transmission module, each sensor is connected with the corresponding signal conditioning circuit, the output end of each signal conditioning circuit is connected to the corresponding main control unit, each CT electricity supply module supplies power to the corresponding main control module, each main control module is connected with the corresponding wireless data transmission module, and the wireless data transmission modules are connected with the monitoring platform through RF antennas. The power transmission line dynamic capacity-increase system solves the problems that a primary side tension meter is hard to install and the wind speed and direction measurement is not accurate on the basis of the design of power transmission line running parameters including the inclination angle, the environment temperature, the solar radiation and the wire load and by calculating the dynamitic carrying capacity of a wire according to the wire temperature, the environment temperature, the solar radiation and the wire load, and the power transmission line dynamic capacity-increase system has the advantages of being safe in temperature measurement work, easy and convenient to install and maintain, high in reliability and safety, and the like.
Description
Technical field
The invention belongs to transmission line of electricity technical field, especially a kind of power transmission line dynamic capacity increase system based on wire inclination angle.
Background technology
Power transmission line dynamic capacity increase technology under the prerequisite of not newly-built circuit, can dynamically promote the transmission capacity of existing wire, improves the economy of Operation of Electric Systems.Existing power transmission line dynamic capacity increase system general tension pick-up measure traverse line tension force, then obtains conductor temperature according to tension force, finally according to wire climate model, utilizes wind speed and direction, environment temperature, solar radiation Strength co-mputation wire maximum carrying capacity.Above-mentioned dynamic compatibilization system Problems existing is: for primary system, and directly on wire, installation tension sensor is often more difficult; In addition, in environmental baseline, wind speed, wind direction change comparatively fast sometimes, existing system measuring wind particularly wind direction time, accuracy is generally lower, causes carrying current calculation reliability on the low side.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of reasonable in design, precision and reliability high and be easy to the power transmission line dynamic capacity increase system based on wire inclination angle installed and used.
The present invention solves existing technical matters and takes following technical scheme to realize:
A kind of power transmission line dynamic capacity increase system based on wire inclination angle, be made up of the multiple data collection station be arranged on high-tension line shaft tower and the monitor supervision platform that is positioned at dispatching center, data collection station to be connected with monitor supervision platform by public GSM/GPRS network and to realize data-transformation facility; Data collection station comprises sensor and modulate circuit, CT electricity-fetching module, main control module and wireless data transfer module, and sensor to be arranged on high-tension line and to be connected with signal conditioning circuit, and the output terminal of signal conditioning circuit is connected on main control unit; CT electricity-fetching module is connected to power taking on high-tension line and carries out being converted to main control module and powers; Main control module is connected with wireless data transfer module, and this wireless data transfer module is connected with monitor supervision platform by RF antenna.
And, described main control module is connected and composed by master cpu unit and peripheral circuit thereof, described master cpu unit adopts C8051F040 chip, described peripheral circuit comprises real-time clock, flash storage, master cpu unit is connected with real-time clock by I2C interface, master cpu unit is by being connected with flash storage by SPI interface, master cpu unit is connected with modulate circuit by A/D interface, and master cpu unit is connected with wireless data transfer module by UART interface.
And described sensor comprises obliquity sensor, temperature sensor and CT unit.
And described temperature sensor comprises temperature sensor, the sensor of measures ambient temperature and the sensor of measure traverse line solar radiation temperature of direct measure traverse line temperature for verifying.
And described wireless data transfer module comprises GPRS module and SIM card, this wireless data transfer module is connected in the UART interface of main control module, and carries out data communication by RF antenna and monitor supervision platform.
And; described CT electricity-fetching module comprises the front end impact protection circuit, rectifying and wave-filtering, the DC/DC mu balanced circuit that connect successively; rectification filter circuit output end is also connected to DC/DC mu balanced circuit by sample circuit, protection circuit; this DC/DC mu balanced circuit also connects electric battery charging, power supply management module manages DC/DC voltage stabilizing, and DC/DC stabilized circuit outputting voltage is controlled in permission voltage range.
Advantage of the present invention and good effect are:
1, native system designs based on transmission line of electricity operational factor (inclination angle, environment temperature, solar radiation, wire load), wire is utilized to hang inclination angle and angle of wind deflection calculating conductor temperature, then based on conductor temperature model, utilize the dynamic current-carrying capacity of conductor temperature, environment temperature, solar radiation and wire carry calculation wire, avoid that difficulty installed by primary side tensiometer, wind speed and direction measures inaccurate problem.
2, native system employing and overhead transmission line high-pressure section are isolated, and guarantee thermometric work safety.
3, native system selects current transformer to be directly coupled power taking from ultra-high-tension power transmission line, and the solar cell system avoiding the many employings of general power transmission line monitoring device exists equipment room Insulation Problems.
4, native system avoids the problem that inconvenience installed by tension pick-up, and installation and maintenance are easy.
5, native system avoids the measurement of wind speed and direction, has high reliability and security.
6, native system is convenient to data statistics and analysis.
Accompanying drawing explanation
Fig. 1 is general structure schematic diagram of the present invention;
Fig. 2 is the hardware circuit diagram of data collection station;
Fig. 3 is the amplifying circuit schematic diagram of CT unit;
Fig. 4 be CT unit lift volt circuit schematic diagram;
Fig. 5 is the schematic diagram of CT electricity-fetching module;
Fig. 6 is the primary interface circuit diagram of wireless data transfer module G24 and main control unit C8051F040;
Fig. 7 is the two-dimentional inclination value schematic diagram measured by obliquity sensor;
Fig. 8 is the measured value schematic diagram of environment temperature and solar radiation temperature;
Fig. 9 is capacity comparison schematic diagram after the existing load of circuit and increase-volume.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the present invention is further described.
A kind of power transmission line dynamic capacity increase system based on wire inclination angle, as shown in Figure 1, be made up of the multiple data collection station be arranged on high-tension line shaft tower and a monitor supervision platform being positioned at dispatching center, data collection station to be connected with monitor supervision platform by public GSM/GPRS network and to realize data-transformation facility.
As shown in Figure 2, the data collection station be arranged on high-tension line shaft tower comprises sensor and modulate circuit, CT electricity-fetching module, main control module and wireless data transfer module four parts thereof.Described sensor comprises obliquity sensor, temperature sensor and CT unit and is arranged on high-tension line, and the signal of the sensor collection is input on signal conditioning circuit, and the output terminal of signal conditioning circuit is connected on the A/D interface of main control unit; Main control module is connected and composed by CPU main control unit and peripheral circuit, and this main control unit adopts C8051F040 chip, and peripherals comprises real-time clock, flash storage; CT electricity-fetching module is connected to power taking on high-tension line and carries out being converted to main control module and powers; Wireless data transfer module comprises GPRS module (MotorolaG24 module) and SIM card, and this wireless data transfer module is connected on main control module by UART mode, and carries out data communication by RF antenna and monitor supervision platform.Data collection station detects the information such as wire inclination angle, environment temperature, solar radiation and wire load in real time by sensor, the process such as filter and amplification are carried out by signal conditioning circuit, under the control of main control unit, signal is sent to monitoring management platform to calculate real-time maximum carrying capacity by GSM/GPRS network after A/D conversion, buffer memory, packing.
Obliquity sensor selects V61-QXJ-BZ-V series two-dimension tilt angle sensor.Output due to obliquity sensor is standard voltage signal, and therefore its modulate circuit only needs to carry out level conversion, signal input a/d converter can be sampled.
Temperature sensor can be divided three classes: directly temperature sensor, the sensor of measures ambient temperature and the sensor of measure traverse line solar radiation temperature of measure traverse line temperature for verifying.Wherein, solar radiation sensor needs the metal shell that temperature sensor is housed to be fixed on conductive line surfaces with aerial condutor same model and surface condition by the snap ring of aluminium, and is coated with heat conductive silica gel.Temperature sensor chip adopts the TMP36 of Analog Devices company, need not can deliver to A/D converter by external circuits.
After current transformer measures primary side current, through lifting volt circuit shown in the amplifying circuit shown in Fig. 3 and Fig. 4, the 0 ~ 3V signal exported is delivered to the A/D interface of master cpu unit.
As shown in Figure 5, it is according to electromagnetic induction principle for CT electricity-fetching module, when flowing through alternating current in transmission line of electricity, getting and can produce induced potential in coil two ends, supplying primary side system terminal after front end impact protection circuit, rectifying and wave-filtering, voltage stabilizing.When primary side current excessive or too small time, by solving the superfluous or not enough temperature of power supply to the discharge and recharge of lithium battery.When primary side be short-circuited fault produce huge transient current time, through impact protection circuit can by output voltage control permission voltage range in.
Consider the composite demand of system, the main control unit in main control module adopts the C8051F040 chip of Silicon Lab company, and this chip has the RAM of inner 256 bytes+outside 4K.12 integrated A/D converters may be used for the simulating signal of sampling sensor through conditioning, and monitor the voltage of power module.Outside real-time timepiece chip more is accurately connected to, the acquisition condition of the inclination angle regularly judging to be set by monitor supervision platform, temperature, information on load by I2C interface; If meet, open corresponding data-acquisition loop collection signal, institute's measurement information according to the rules form be stored in the outside flash reservoir that SPI interface connects; Finally by wireless transport module, by inclination angle, temperature, information on load according to the rules form be returned to monitor supervision platform.
Wireless data transfer module serves as the vital task of whole data collection station data transmission and data interaction.Native system selects Motorola G24 as main wireless data module, as shown in Figure 6.This wireless communication module G24 works and can to realize GPRS network transmission data after external SIM card and send SMS message function to cellphone subscriber, and CPU main control unit sends AT order and data by UART mouth to G24.
Run by scene, we we to obtain relevant service data as follows:
The two-dimentional inclination value of Fig. 7 measured by obliquity sensor, in figure, top curve is the suspension inclination angle in wire vertical projection plane, and Figure below curve is angle of wind deflection, finds that the measuring error of obliquity sensor is within 1% by the test in multiple strain section.
Fig. 8 is the measured value of environment temperature and solar radiation temperature.Wherein solar radiation temperature value is substantially identical with the variation tendency of ambient temperature value.
Fig. 9 is capacity comparison schematic diagram after the existing load of circuit and increase-volume.Lower curve is circuit Real-time Load, and top curve is the wire maximum carrying capacity that dynamic compatibilization system calculates, and as can be seen from the figure, the dynamic compatibilization system based on circuit operational factor and environmental baseline effectively increases wire capacity.
It is emphasized that; embodiment of the present invention is illustrative; instead of it is determinate; therefore the present invention includes the embodiment be not limited to described in embodiment; every other embodiments drawn by those skilled in the art's technical scheme according to the present invention, belong to the scope of protection of the invention equally.
Claims (6)
1. the power transmission line dynamic capacity increase system based on wire inclination angle, it is characterized in that: be made up of the multiple data collection station be arranged on high-tension line shaft tower and the monitor supervision platform that is positioned at dispatching center, data collection station to be connected with monitor supervision platform by public GSM/GPRS network and to realize data-transformation facility; Data collection station comprises sensor and modulate circuit, CT electricity-fetching module, main control module and wireless data transfer module, and sensor to be arranged on high-tension line and to be connected with signal conditioning circuit, and the output terminal of signal conditioning circuit is connected on main control unit; CT electricity-fetching module is connected to power taking on high-tension line and carries out being converted to main control module and powers; Main control module is connected with wireless data transfer module, and this wireless data transfer module is connected with monitor supervision platform by RF antenna.
2. the power transmission line dynamic capacity increase system based on wire inclination angle according to claim 1, it is characterized in that: described main control module is connected and composed by master cpu unit and peripheral circuit thereof, described master cpu unit adopts C8051F040 chip, described peripheral circuit comprises real-time clock, flash storage, master cpu unit is connected with real-time clock by I2C interface, master cpu unit is by being connected with flash storage by SPI interface, master cpu unit is connected with modulate circuit by A/D interface, master cpu unit is connected with wireless data transfer module by UART interface.
3. the power transmission line dynamic capacity increase system based on wire inclination angle according to claim 1, is characterized in that: described sensor comprises obliquity sensor, temperature sensor and CT unit.
4. the power transmission line dynamic capacity increase system based on wire inclination angle according to claim 3, is characterized in that: described temperature sensor comprises temperature sensor, the sensor of measures ambient temperature and the sensor of measure traverse line solar radiation temperature of direct measure traverse line temperature for verifying.
5. the power transmission line dynamic capacity increase system based on wire inclination angle according to claim 1, it is characterized in that: described wireless data transfer module comprises GPRS module and SIM card, this wireless data transfer module is connected in the UART interface of main control module, and carries out data communication by RF antenna and monitor supervision platform.
6. the power transmission line dynamic capacity increase system based on wire inclination angle according to claim 1; it is characterized in that: described CT electricity-fetching module comprises the front end impact protection circuit, rectifying and wave-filtering, the DC/DC mu balanced circuit that connect successively; rectification filter circuit output end is also connected to DC/DC mu balanced circuit by sample circuit, protection circuit; this DC/DC mu balanced circuit also connects electric battery charging, power supply management module manages DC/DC voltage stabilizing, and DC/DC stabilized circuit outputting voltage is controlled in permission voltage range.
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Cited By (2)
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| CN104897993A (en) * | 2015-06-09 | 2015-09-09 | 上海交通大学 | Carrying capacity evaluation method of overhead transmission line |
| CN109141356A (en) * | 2017-06-15 | 2019-01-04 | 乐山市晨晖科技有限公司 | Detection terminal for roadbed vertical pipe gradient |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104897993A (en) * | 2015-06-09 | 2015-09-09 | 上海交通大学 | Carrying capacity evaluation method of overhead transmission line |
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| CN109141356A (en) * | 2017-06-15 | 2019-01-04 | 乐山市晨晖科技有限公司 | Detection terminal for roadbed vertical pipe gradient |
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Application publication date: 20150218 |