CN112286105A - Real-time measuring device for dynamic load of power transmission line iron tower - Google Patents
Real-time measuring device for dynamic load of power transmission line iron tower Download PDFInfo
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- CN112286105A CN112286105A CN202011195983.0A CN202011195983A CN112286105A CN 112286105 A CN112286105 A CN 112286105A CN 202011195983 A CN202011195983 A CN 202011195983A CN 112286105 A CN112286105 A CN 112286105A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0428—Safety, monitoring
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2612—Data acquisition interface
Abstract
The invention provides a real-time measuring device for dynamic loads of a power transmission line iron tower, which comprises a monitoring module, a data transmission module and a data processing module, wherein the monitoring module comprises wire tension monitoring equipment and weather monitoring equipment, the wire tension monitoring equipment and the weather monitoring equipment are installed on a power transmission line and are used for monitoring the wire tension of the power transmission line and weather change data near a line corridor, the data transmission module comprises a network transmission module, the network transmission module is used for transmitting data, the data processing module comprises a data concentrator and a monitoring center, the data concentrator is used for receiving the data of the monitoring module, and the monitoring center analyzes and calculates data information from the data transmission module through a mathematical analysis model.
Description
Technical Field
The invention relates to the field of power transmission line load measurement, in particular to a real-time measurement device for a dynamic load of a power transmission line iron tower.
Background
The existing power transmission line load measurement data is discrete data, and the dynamic load of a power transmission line iron tower cannot be measured in real time. The technical difficulty is that measured data such as air temperature, air pressure, wind speed, wind direction, rainfall, stress and the like are discrete, and real-time and dynamic load of the iron tower cannot be accurately measured.
The conventional load of the power transmission line iron tower refers to the load of a wire, namely static load, the influence of wind speed, wind direction, rainfall and a tower wire system on the load of the iron tower is not considered, the static load data of the power transmission line can not completely reflect the real load information of the iron tower in coastal areas with frequent typhoons, effective preventive measures can not be made aiming at the real load information, the loss of the iron tower is caused by natural disasters such as typhoons, a large amount of manpower and material resources are needed to be spent for maintenance, the power utilization condition of people is influenced, inconvenience is brought to life, and a great deal of safe and effective early warning and a great number of measures for designing and installing the iron tower and improving the typhoons prevention of the power transmission line according to the real-time dynamic information of the power transmission line of the iron tower.
Therefore, a real-time measurement device for the dynamic load of the power transmission line iron tower is needed, which can be used for the design and installation of the power transmission line iron tower and the evaluation of typhoon prevention of the power transmission line iron tower for the dynamic load of the power transmission line iron tower.
Disclosure of Invention
Therefore, the invention aims to provide a device for measuring dynamic load of an iron tower of a power transmission line in real time, so as to solve the problems in the prior art.
The utility model provides a real-time measuring device of transmission line iron tower dynamic load, the device includes monitoring module, data transmission module, data processing module, monitoring module includes wire tension monitoring facilities and weather monitoring facilities, wire tension monitoring facilities and weather monitoring facilities install on the transmission line for monitoring transmission line wire tension and the nearby climatic change data of line corridor, data transmission module includes network transmission module, network transmission module is used for the transmission of data, data processing module includes data concentrator and surveillance center, data concentrator is used for receiving monitoring module's data, the surveillance center is through the analysis of mathematical analysis model data information from data transmission module and calculation.
Further, the wire tension monitoring device comprises a wire tension sensor which transmits data to the data concentrator through the network transmission module.
Further, the meteorological monitoring device includes a meteorological sensor that transmits data to the data concentrator via the network transmission module.
Furthermore, the monitoring module still includes monitoring devices sensor, monitoring devices sensor includes force sensor and angle sensor, force sensor and angle sensor all set up between insulator chain and iron tower for gather parameter data and transmit data to the data concentrator through network transmission module.
Furthermore, the tension sensor is an S-shaped tension sensor, a plate ring type tension sensor or a column type tension sensor.
Furthermore, the two ends of the S-shaped tension sensor are of hanging hole structures and are respectively hung between the tower and the insulator string through the hanging holes at the two ends.
The solar energy monitoring device comprises a solar energy power generation device, a storage battery, a solar energy controller and a voltage transformation circuit, wherein the solar energy controller is respectively and electrically connected with the solar energy power generation device, the storage battery and the voltage transformation circuit, and the storage battery is respectively and electrically connected with a monitoring module, a data transmission module and a data processing module.
Further, the network transmission module comprises a wired network transmission module and a wireless network transmission module, the wired network transmission module adopts serial port communication, the monitoring module is connected with the data concentrator through the wired network transmission module, the wireless network transmission module adopts GPRS communication, and the data concentrator is connected with the monitoring center through the wireless network transmission module.
Further, the monitoring center comprises an instant retrieval module, a historical data query module, a performance query module, a tower mechanics module and a power supply calculation module, wherein the instant retrieval module is used for retrieving data of the monitoring module, the historical data query module is used for querying historical monitoring data of the monitoring module, the performance query module is used for querying performance according to the data of the tower mechanics module, the tower mechanics module is used for acquiring data collected by the monitoring module and calculating stress conditions of a tower lead, the power supply calculation module is used for selecting a battery and calculating the capacity of the battery, and the monitoring center analyzes data parameters of the instant retrieval module, the historical data query module and the performance query module and evaluates design and installation of a power transmission line iron tower and typhoon prevention of the power transmission line according to analysis results.
Compared with the prior art, the invention has the beneficial effects that:
according to the real-time measuring device for the dynamic load of the power transmission line iron tower, the wire tension monitoring equipment and the meteorological monitoring equipment are installed on the power transmission line, so that the data of the wire tension of the power transmission line and the climatic change near a line corridor are monitored in real time, the device meets the requirement of measuring and sampling frequency of the dynamic load of the wire vibration of the iron tower under the typhoon effect, and transmits the data result to the background monitoring center through the wireless network equipment transmission module, so that the analysis and the processing of the data at the later stage are realized, the dynamic load and the meteorological monitoring data of the iron tower are mastered, the design and the installation of the power transmission line iron tower and the typhoon prevention evaluation of the power transmission line are carried out aiming at.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description are only preferred embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive efforts.
Fig. 1 is a communication schematic diagram of a device for measuring dynamic load of an electric transmission line iron tower in real time according to an embodiment of the invention.
FIG. 2 is a schematic diagram of a Wheatstone bridge of a device for measuring dynamic load of an iron tower of a power transmission line in real time according to an embodiment of the invention
Schematic representation.
Fig. 3 is a schematic diagram of a power module of the device for measuring dynamic load of the power transmission line iron tower in real time according to the embodiment of the invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, the illustrated embodiments are provided to illustrate the invention and not to limit the scope of the invention.
Referring to fig. 1, the invention provides a real-time measuring device for dynamic load of a power transmission line iron tower, which comprises a monitoring module, a data transmission module and a data processing module, wherein the monitoring module comprises a wire tension monitoring device and a weather monitoring device, the wire tension monitoring device and the weather monitoring device are installed on a power transmission line and are used for monitoring wire tension of the power transmission line and weather change data near a line corridor, the data transmission module comprises a network transmission module, the network transmission module is used for data transmission, the data processing module comprises a data concentrator and a monitoring center, the data concentrator is used for receiving data of the monitoring module, and the monitoring center analyzes and calculates data information from the data transmission module through a mathematical analysis model.
Specifically, the data concentrator is configured to receive data from the sensor, perform preliminary processing and storage on the data, send the data to the monitoring center, and receive a control instruction from the monitoring center to enable the monitoring module to operate in a certain mode. The data concentrator is one of the important devices for dynamic load monitoring, is positioned in the middle of a system information path, and is a bridge for information exchange in the whole device system.
The monitoring center is the brain of the whole device system, the data processing result directly reflects the dynamic change of the tension of the wire, the weather near the line corridor and the dynamic load of the iron tower, and the accuracy of the monitoring center can influence the judgment of professionals on the running state of the power transmission iron tower.
The device mainly through installing wire tension monitoring facilities and meteorological monitoring equipment on the power transmission line, the data of the climatic change near real-time supervision transmission line wire tension and line corridor, the device satisfies iron tower wire vibration dynamic load measurement sampling frequency requirement and passes through network transmission module with the data result to backstage surveillance center under the typhoon effect, so that the analysis of data is carried out to the mathematical analysis model of surveillance center, make things convenient for managers to master iron tower dynamic load, meteorological monitoring data and carry out the design of corresponding transmission line iron tower to dynamic load data and meteorological detection data, the aassessment of installation and transmission line typhoon-proof.
The wire tension monitoring device comprises a wire tension sensor which transmits data to a data concentrator through a network transmission module.
Specifically, the tension sensor is a device of the transmission line at the forefront of monitoring data, the tension data provides an important basis for calculation and analysis, and the measurement precision directly influences the accuracy of the whole data analysis; tension sensors, also called resistance strain sensors, are generally used for measuring tension, belong to the weighing sensor series, and are devices for converting physical signals into measurable electrical signals and outputting the signals. The strain type tension sensor is constructed by utilizing a resistance bridge, a resistance strain gauge is arranged in the resistance bridge, when the sensor is stressed, the resistance strain gauge deforms to generate resistance change, a differential signal is output after passing through the bridge, the signal is weak and is microvolt-level voltage, and the differential signal is amplified and output through a high-precision and high-gain direct current amplifier. The dc amplifier is required to have a high requirement, amplify a very weak differential signal under the condition of a common-mode signal, and have an extremely low zero drift, a high common-mode rejection ratio and a high power supply rejection ratio. The output of the resistance type strain tension sensor is a strain signal, and precise measurement is needed to be carried out through a Wheatstone bridge. A wheatstone bridge schematic is shown in fig. 2. Wherein U isiFor supply voltage, UoTo output a voltage, R1，R2，R3，R4Respectively on the four arms of the wheatstone bridge.
The bridge output voltage is:
the partial derivative of Uo can be obtained:
for full equal arm bridge R1＝R2＝R3＝R4Then, then
As can be seen from the above formula, the resistance change on the bridge arm can be converted into the output voltage UoCan be measured by measuring the voltage UoAnd obtaining the variable quantity of the resistance on the bridge arm.
The meteorological monitoring equipment comprises a meteorological sensor, the meteorological sensor transmits data to the data concentrator through the network transmission module, and the meteorological sensor can be arranged along the line of the iron tower and can quickly detect meteorological information at the position.
The monitoring module further comprises a monitoring device sensor, the monitoring device sensor comprises a tension sensor and an angle sensor, and the tension sensor and the angle sensor are both arranged between the insulator string and the iron tower and used for collecting parameter data and transmitting the data to the data concentrator through the network transmission module.
The tension sensor is an S-shaped tension sensor, a plate ring type tension sensor or a column type tension sensor.
And the two ends of the S-shaped tension sensor are of hanging hole structures and are respectively hung between the tower and the insulator string through the hanging holes at the two ends.
The solar energy monitoring device is characterized by further comprising a power supply module, wherein the power supply module provides electric energy for the whole device, the power supply module comprises a solar power generation device, a storage battery, a solar controller and a transformation circuit, the solar controller is respectively and electrically connected with the solar power generation device, the storage battery and the transformation circuit, and the storage battery is respectively and electrically connected with the monitoring module, the data transmission module and the data processing module.
Specifically, it is a prominent problem to supply power to the device in the field, and since the power transmission line towers are generally located in remote areas, and there is no commercial power in the field, and the voltage of the power transmission line conductor is very high, it is unlikely that a conventional power supply is used for supplying power to the monitoring equipment. Aiming at the problem, a power supply system of a monitoring module, a data transmission module and a data processing module in the monitoring device adopts a solar energy and storage battery mode to supply power. The solar cell panel can work only by being irradiated by sunlight and generate direct current voltage output, but the output voltage fluctuates up and down, so that the output power changes greatly, namely the solar cell is a power supply with a large fluctuation range, therefore, a solar controller is required to intelligently control the output of the solar cell and the charging and discharging of a storage battery, and the typical structure of the solar energy and storage battery power supply device is shown in fig. 3.
The solar energy and storage battery power supply method has the advantages of mature technology, high power supply reliability, adjustable output power, low cost and easy realization, and is particularly suitable for being used in the area with sufficient sunlight for a long time in Hainan province. However, dust accumulated on the solar cell panel working in the field for a long time is not easy to clean, the intensity of input sunlight is weakened, and the long-term maintenance-free capability is lacked, so that the problems should be noticed during the use process.
The network transmission module comprises a wired network transmission module and a wireless network transmission module, the wired network transmission module adopts serial port communication, the monitoring module is connected with the data concentrator through the wired network transmission module, the wireless network transmission module adopts GPRS communication, and the data concentrator is connected with the monitoring center through the wireless network transmission module.
Specifically, the serial communication adopts an AVR single chip microcomputer to realize the communication between the sensor and the data concentrator, and a serial communication link is established between the AVR single chip microcomputer and the data concentrator host. Selecting an ATmegal28 chip as the master unit, ATmegal28 has a universal synchronous and asynchronous serial receiver and repeater (USART), which is a heavy serial communication device interface with a high degree of flexibility. ATmegal28 supports full duplex operation, with a high precision baud rate generator, supports 5, 6, 7, 8, or 9 data bits and 1 or 2 stop bits, and hardware supports parity operation. ATmegal28 has two USARTs, USART0 and USART1, respectively. However, in the ATmegal03 compatible mode, USART1 is not visible, i.e., ATmegal28 only supports one asynchronously operating USART0 at this time.
The data concentrator is connected with the single chip microcomputer through a USB (universal serial bus) conversion serial port line, ATmegal28 continuously sends data to a computer in a continuous sending mode, and actual tests show that the sampling frequency of the data concentrator for collecting the tension of the lead can reach 65Hz under the condition of 9600 baud rate.
The analog voltage signal transmitted by the tension sensor needs to be converted by an A/D analog-to-digital conversion device. The a/D analog-to-digital conversion is generally realized by a professional a/D analog-to-digital conversion chip, and can convert an analog signal into a digital signal. The a/D analog-to-digital converter may be divided into 4 bits, 6 bits, 8 bits, 10 bits, 14 bits, 16 bits, etc. according to resolution. The conversion speed can be divided into super high speed (conversion time is more than or equal to 330us), sub-super high speed (330 us-3.3 us), high speed (3.3-330 us), low speed (conversion time is more than 330us) and the like. The a/D analog-to-digital converter can be classified into direct conversion and indirect conversion according to the conversion principle. Direct conversion is a method of directly converting an analog signal into a digital signal, such as successive approximation and parallel comparison. The successive approximation method is easy to realize by an integration process and can achieve higher resolution and speed, so that the successive approximation method is commonly used for the conventional integrated A/D conversion chip. Indirect a/D analog-to-digital conversion is to convert an analog quantity to an intermediate quantity and then convert the intermediate quantity to a digital quantity.
Because the power transmission line is wide in distribution and long in distance, the power transmission line cannot be monitored on line in real time by adopting the traditional short-distance communication means such as RS232, RS485, infrared and radio. With the development of wireless communication technologies such as GSM, GPRS, CDMA, satellite communication and the like, the realization of remote monitoring becomes possible. GPRS is a General Packet Radio Service (GPRS) that is called a 2.5 generation GPRS and is a short-term General Packet Radio Service (GPRS) that can quickly transmit data in real time.
The monitoring center comprises an instant retrieval module, a historical data query module, a performance query module, a tower mechanics module and a power supply calculation module, wherein the instant retrieval module is used for retrieving data of the monitoring module, the historical data query module is used for querying historical monitoring data of the monitoring module, the performance query module is used for querying performance according to the data of the tower mechanics module, the tower mechanics module is used for acquiring data collected by the monitoring module and calculating stress conditions of a tower lead, the power supply calculation module is used for selecting a battery and calculating the capacity of the battery, the monitoring center analyzes data parameters of the instant retrieval module, the historical data query module and the performance query module, and design and installation of a power transmission line iron tower and typhoon prevention evaluation of the power transmission line are carried out according to analysis results.
Specifically, the working personnel can quickly retrieve the instant data of the current iron tower power transmission line, such as the tension condition of the current power transmission line and meteorological information along the line, through the instant retrieval module and the instant retrieval module of the monitoring center, the performance condition of the iron tower can be really reflected through the instant retrieval, the historical data query module can query the data in different time periods, the management personnel can monitor and maintain the iron tower according to the existing data through the data comparison in different time periods, the performance query module and the performance query module can obtain the stress condition of the iron tower through the mechanical calculation of the pole tower mechanical module, such as the stress of the iron tower under relatively stable wind speed and the stress condition of the iron tower under extreme weather, such as typhoon, and the load and the monitoring of the iron tower power transmission line can be checked and analyzed in real time through the performance query of the iron tower in different environments, the design and installation of the transmission line iron tower and the evaluation of the typhoon prevention of the transmission line can be carried out through analysis.
Specifically, the concrete steps of the tower pole mechanics module calculation are as follows:
the tension sensor is used for obtaining tension T on the insulator string, and the final tension TC and the resultant force direction of the lead, namely the included angle gamma between the final tension TC and the vertical direction, are synthesized according to the force on the insulator string and the corresponding formula by calculating the horizontal tension TH and the vertical tension TV of the lead.
The concrete solving method comprises the following steps:
(1) calculating longitudinal horizontal tension TH ABAnd TH AC，
Initial stringing conditions: lAB、lAC(ii) a Height difference hAB、hAC(ii) a Original wire length SAB0、SAC0(ii) a Temperature coefficient of wire alphaAB、αAC(ii) a Initial temperature t0Collecting the temperature t; lead dead weight specific load gammaAB0、γAC0(ii) a Cross section area A of wireAB、AACThen the unit load q of the wireAB0＝γAB0AAB、qAC0＝γAC0AAC. According to the catenary equation, the horizontal tension is calculated by the formula:
in the formula, l, h, S and q are known amounts.
(2) Calculating horizontal tension TH ABAnd TH ACCorresponding gear pitch lD1 ABAnd lD1 AC
The following is obtained according to the catenary equation:
the horizontal force can be calculated by formula
Others are all known parameters; the equivalent gear span at this time is also calculated under windless and ice-free conditions.
(3) Calculating equivalent line length
And
the length of the wire corresponding to the equivalent span is the equivalent length
(4) Determining the initial condition of tension and angle:
recording tension value T returned by monitor in case of no wind during initial installation0Insulator X-axis deflection angle
This value serves as an initial value for monitoring. If m sensors are installed on site, the initial value is the sum of the components of the tension values returned by the m sensors in the vertical direction. If the insulator string is initially installed, the insulator string has an inclination angle along the line
Wind deflection angle perpendicular to the line
Also recorded, then the initial force in the vertical direction is:
(5) calculating the tension in the horizontal direction:
the tension sensor and the angle sensor which are arranged on the insulator string transmit tension T (unit N) back at intervals;
the lateral horizontal tension is calculated as follows:
from Newton's second law, the tension of the wire in the horizontal direction is also TH wind。
The specific calculation steps of the power supply calculation module are as follows:
(1) selection and capacity calculation of the solar panel:
a solar photovoltaic cell is a device which converts solar radiation into electrical energy through a semiconductor substance by using a photoelectric conversion principle, and the photoelectric conversion process is generally called a "photovoltaic effect". The solar photovoltaic cell directly converts solar radiation energy into direct current for load use or stored in a storage battery for standby use, is one of the most important components in a power module of a data concentrator, and the conversion rate and the service life of the solar photovoltaic cell are important factors for determining whether the solar cell has the use value or not. Tables 3-3 show the comparison of efficiency, price, reliability and market share of solar cells of different materials, and the cost performance of polysilicon is the best in the present view.
Tables 3-3 comparison of solar cell efficiency, price, reliability and market share for different materials at present
The calculation of the capacity of the photovoltaic cell can be performed by calculating the total number of components of the photovoltaic cell based on the voltage requirement in the power supply system, the magnitude of the load current shared by the solar cell, the sunshine condition at the place of use, and the like. The required operating voltage can be obtained by connecting a certain number of solar cell modules in series, but the number of solar cell modules connected in series must be appropriate. If the number of the series connections is too small, the series voltage is lower than the floating charge voltage of the storage battery, and the square matrix cannot charge the storage battery. If the number of series connections is too large, the output voltage is much higher than the float voltage, the charging current will not increase significantly. Therefore, the optimum state of charge can be achieved only when the series voltage of the solar cell module is equal to the appropriate float voltage.
Number N of series solar cell modulesSThe calculation method is as follows:
in the formula: u shapeRRepresenting the output minimum voltage of the solar cell matrix;
UOCrepresents the optimal operating voltage of the solar cell module;
Ufrepresents the battery float voltage;
UDrepresents the diode drop, and is generally 0.7V;
UCrepresenting the pressure drop due to other factors, typically 1V.
The float voltage of the battery is related to the selected battery parameter and should be equal to the maximum operating voltage of the selected battery cell at the lowest temperature multiplied by the number of cells in series.
Number of solar cell module parallel connection NpThe calculation method is as follows:
firstly, the solar daily radiant quantity H of a solar cell array installation place needs to be determined according to a formulatConverted into the average daily irradiance H at standard light intensity:
H＝Ht×2.778/10000h
in the formula: 2.778/10000h (h.m 2/kJ) is a coefficient for converting the daily dose into the average daily radiation hours under the standard light intensity (1000W/m 2).
Subsequently, the daily power generation amount Q of the solar cell module is calculatedp
QP＝IOC×H×KOPCZ
In the formula: i isocRepresenting the optimal working current of the solar cell module;
Koprepresents the slope correction factor, as shown in tables 3-4;
CZthe correction coefficient is expressed, mainly the correction coefficient, mainly the loss of combination, attenuation, dust, charging efficiency and the like, and is generally 0.8;
TABLE 3-4 slope correction factor
| KOP | Region of land |
| >1.14 | Heilongjiang, inner Mongolia, Jilin, Ningxia and Xinjiang Hami |
| 1.08～1.14 | Liaoning, Shanxi, Qinghai, Tibet, Hebei and Xinjiang |
| 1.02～1.08 | Shandong, Shanxi, Jiangsu Nanjing, Henan, Gansu and Shenyang |
| 0.96～1.02 | Shandong tobacco platform, Shaanxi Xian, Xinjiang Kashi and Jiangsu |
| 0.90～0.96 | The heads of Wuhan, Zhejiang and Guangdong Shanshan of Yunnan, Hubei province |
| 0.84～0.90 | Guangdong, Jiangxi, Hubei, Fujian, Hainan and Yunnan estuary |
| 0.78～0.84 | Guangxi and Hunan provinces |
| 0.72～0.78 | Guangxi Guilin, Sichuan |
| <0.72 | Sichuan Nanchong, Daxian, Leshan, Guizhou Zunyi and Chongqing |
The shortest interval days between two groups of longest continuous rainy days are mainly considered for supplementing the lost storage battery electric quantity in the data, and the storage battery capacity to be supplemented is as follows:
Bcb＝A×QL×NL
in the formula: a, taking the safety coefficient to be 1.1-1.4;
QLthe average daily power consumption of the load is the working current multiplied by the daily working hours;
NLthe longest continuous rainy day;
the method for calculating the parallel number of the solar cell modules comprises the following steps:
in the formula: n is a radical ofWRepresenting the shortest number of days between two longest consecutive rainy days
The expression of the above formula means: the number of the solar battery sets connected in parallel, the generated energy in the shortest interval days between two groups of continuous rainy days is not only used for the load, but also needs to complement the power loss of the storage battery in the longest continuous rainy days.
And according to the serial-parallel number of the solar cell modules, obtaining the power P of the required solar cell matrix:
P＝PO×NS×NP
in the formula: p0The rated power of the solar cell module.
The optimal inclination angle beta OP for mounting the solar panel is selected as shown in tables 3-5:
TABLE 3-5 optimum dip angle selection table
| Northern area | +5°～+12° |
| Middle region | +5°～+8° |
| Region near Guangdong | 0°～+5° |
| Tibet, Yunnan, plateau area | -8°～0° |
| Hainan island | +12° |
(1) Calculation of battery capacity and type selection
The storage battery is an energy storage component of the whole monitoring base station power supply module, and the selection of the storage battery generally follows the following principle: firstly, on the premise of meeting the requirement of working of the night device, the energy of the solar cell module in the daytime is stored as much as possible, and meanwhile, the electric energy meeting the requirements of continuous rainy days and working of the night device can be stored. The demand that device work at overcast and rainy day and night in succession can not be satisfied to the battery capacity undersize, and battery capacity is too big, and the battery is in insufficient voltage state all the time on the one hand, influences the battery life-span, causes the waste simultaneously.
The capacity BC of the battery can be calculated using the following equation:
in the formula:
a is a safety coefficient and is taken to be 1.1-1.4;
QLthe average daily power consumption of the load is the working current multiplied by the daily working hours;
NLthe longest continuous rainy day;
T0for temperature correction coefficient, generally 1 is selected above 0 deg.C and 1.1 is selected above-10 deg.C and 1.2 is selected below-10 deg.C;
CC is the depth of discharge of the storage battery, 0.75 is taken as a general lead-acid storage battery, and 0.85 is taken as an alkaline nickel-cadmium storage battery.
According to the current running condition of each device, calculating load power P, namely power consumption of a control unit (including a communication module):
12V×0.08A＝0.96W
maximum power consumption of meteorological data acquisition units (including meteorological sensors):
5V×0.03A≤0.15W
the system power consumption is:
P＝0.96+0.15≈1.2W
when P is 1.2W and needs 24 hours of uninterrupted power supply, and when the reserve period is 30 days, the formula is substituted to obtain:
C＝1.2×(1.2×24/12)×30×1.1/0.8＝118.8(Ah)≈120Ah
and selecting the optimal solar cell panel and capacity through the calculation process.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. The device is characterized by comprising a monitoring module, a data transmission module and a data processing module, wherein the monitoring module comprises wire tension monitoring equipment and weather monitoring equipment, the wire tension monitoring equipment and the weather monitoring equipment are installed on a power transmission line and are used for monitoring wire tension of the power transmission line and weather change data near a line corridor, the data transmission module comprises a network transmission module, the network transmission module is used for transmitting data, the data processing module comprises a data concentrator and a monitoring center, the data concentrator is used for receiving the data of the monitoring module, and the monitoring center analyzes and calculates data information from the data transmission module through a mathematical analysis model.
2. The device for measuring the dynamic load of the power transmission line iron tower in real time as claimed in claim 1, wherein the wire tension monitoring equipment comprises a wire tension sensor, and the wire tension sensor transmits data to the data concentrator through a network transmission module.
3. The device for measuring the dynamic load of the power transmission line tower in real time as claimed in claim 1, wherein the meteorological monitoring equipment comprises a meteorological sensor, and the meteorological sensor transmits data to the data concentrator through a network transmission module.
4. The device for measuring the dynamic load of the power transmission line iron tower in real time according to claim 1, wherein the monitoring module further comprises a monitoring device sensor, the monitoring device sensor comprises a tension sensor and an angle sensor, and the tension sensor and the angle sensor are both arranged between the insulator string and the iron tower and are used for acquiring parameter data and transmitting the data to the data concentrator through the network transmission module.
5. The device for measuring the dynamic load of the power transmission line iron tower in real time as claimed in claim 4, wherein the tension sensor is an S-shaped tension sensor, a plate ring type tension sensor or a column type tension sensor.
6. The device for measuring the dynamic load of the power transmission line iron tower in real time as claimed in claim 5, wherein the two ends of the S-shaped tension sensor are in hanging hole structures and are respectively hung between the tower and the insulator string through hanging holes at the two ends.
7. The device for measuring the dynamic load of the power transmission line iron tower in real time according to claim 1, further comprising a power supply module, wherein the power supply module supplies electric energy to the whole device, the power supply module comprises a solar power generation device, a storage battery, a solar controller and a transformation circuit, the solar controller is respectively and electrically connected with the solar power generation device, the storage battery and the transformation circuit, and the storage battery is respectively and electrically connected with the monitoring module, the data transmission module and the data processing module.
8. The device for measuring the dynamic load of the power transmission line iron tower in real time as claimed in claim 1, wherein the network transmission module comprises a wired network transmission module and a wireless network transmission module, the wired network transmission module is in serial port communication, the monitoring module is connected with the data concentrator through the wired network transmission module, the wireless network transmission module is in GPRS communication, and the data concentrator is connected with the monitoring center through the wireless network transmission module.
9. The device for measuring the dynamic load of the iron tower of the power transmission line in real time as claimed in claim 1, wherein the monitoring center comprises an instant retrieval module, a historical data query module, a performance query module, a tower mechanics module and a power calculation module, the instant retrieval module is used for retrieving data of the monitoring module, the historical data query module is used for querying historical monitoring data of the monitoring module, the performance query module is used for querying performance according to the data of the tower mechanics module, the tower mechanics module is used for acquiring data collected by the monitoring module and calculating stress conditions of a tower lead, the power calculation module is used for selecting a battery and calculating capacity of the battery, the monitoring center analyzes data parameters of the instant retrieval module, the historical data query module and the performance query module, and designs, designs and calculates the capacity of the iron tower of the power transmission line according to analysis results, And (4) installation and evaluation of typhoon prevention of the power transmission line.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011195983.0A CN112286105A (en) | 2020-10-30 | 2020-10-30 | Real-time measuring device for dynamic load of power transmission line iron tower |
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| CN202011195983.0A CN112286105A (en) | 2020-10-30 | 2020-10-30 | Real-time measuring device for dynamic load of power transmission line iron tower |
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| CN202011195983.0A Pending CN112286105A (en) | 2020-10-30 | 2020-10-30 | Real-time measuring device for dynamic load of power transmission line iron tower |
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|---|---|---|---|---|
| CN208012651U (en) * | 2018-01-31 | 2018-10-26 | 海南电网有限责任公司电力科学研究院 | A kind of transmission tower dynamic load real time monitoring protective device |
| CN210222990U (en) * | 2019-08-16 | 2020-03-31 | 新疆送变电有限公司 | On-line monitoring system for windproof stay wire of power transmission line |
| CN111767505A (en) * | 2020-05-19 | 2020-10-13 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Method for monitoring icing rate of tangent tower wire of power transmission line |
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| CN208012651U (en) * | 2018-01-31 | 2018-10-26 | 海南电网有限责任公司电力科学研究院 | A kind of transmission tower dynamic load real time monitoring protective device |
| CN210222990U (en) * | 2019-08-16 | 2020-03-31 | 新疆送变电有限公司 | On-line monitoring system for windproof stay wire of power transmission line |
| CN111767505A (en) * | 2020-05-19 | 2020-10-13 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Method for monitoring icing rate of tangent tower wire of power transmission line |
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Application publication date: 20210129 |