CN111811570A - A method and system for multi-channel all-weather measurement of composite field intensity of DC transmission lines - Google Patents

Abstract

The invention discloses a method and a system for multi-channel all-weather measurement of the synthesized field intensity of a direct current transmission line, wherein the method comprises the following steps: arranging a plurality of field mills in a set area from one side phase to the other side phase of the direct-current transmission conductor; each field mill carries out real-time measurement on the direct current synthesized field intensity to obtain synthesized field intensity measurement data of each field mill, and the synthesized field intensity measurement data are sent to a host according to a preset time sequence; measuring meteorological parameters through a meteorological station, and sending the meteorological parameters to a host according to a preset time sequence; acquiring the content of particulate matters in the air through an atmospheric dust meter, and sending the content of the particulate matters in the air to a host according to a preset time sequence; acquiring rainfall and snowfall moments through a weather phenomenon instrument, and sending the rainfall and snowfall moments to a host according to a preset time sequence; and determining the relationship between the synthesized field intensity measurement data and meteorological parameters, the content of particulate matters in the air and the time of rainfall and snowfall.

Description

A method and method for multi-channel all-weather measurement of composite field intensity of direct current transmission lines system

technical field

The invention relates to the technical field of electromagnetic environment measurement of power systems, and more particularly, to a method and a system for multi-channel all-weather measurement of composite field intensity of direct current transmission lines.

Background technique

With the vigorous construction and development of ultra-high voltage direct current transmission projects in my country, the impact on the environment caused by ion current and combined direct current field strength caused by direct current transmission has been paid more and more attention by design, operation, and environmental protection departments. As an important environmental evaluation factor, the combined DC field strength has become one of the decisive factors for the selection and arrangement of conductors in DC transmission projects.

The development process of corona in DC transmission lines is different from that in AC. The corona discharge of HVDC lines will generate charged ions. These charged ions are pushed away from the ground under the action of the electric field, causing the electric field strength to increase to the number of the nominal electric field. times, resulting in a DC composite field strength. Due to the existence of ions, the DC composite field strength is greatly affected by external wind speed, rainfall, snowfall and other conditions.

When conducting environmental impact assessment in my country, the DC composite field strength is generally measured in "good weather with wind speed less than 2m/s, no rain, no fog, and no snow". The data obtained are only the measurement results in good weather, while the actual transmission The residents along the line have been under the influence of the electromagnetic environment of the DC transmission line for a long time. People are very concerned about the level and characteristics of the DC composite field strength in various climates. The measurement data of the DC composite field strength in severe weather such as snow and snow are very scarce. The measurement device and method are also difficult to meet the needs of severe weather applications. At the same time, when the content of particulate matter in the air is high, it is easy to accumulate dust on the field grinding probe, resulting in inaccurate measurement results. It is urgent to establish a combined field strength measurement system and method for DC transmission lines. , to achieve all-weather accurate measurement of DC composite field strength.

Therefore, there is an urgent need for a technology to realize multi-channel all-weather measurement of the composite field strength of DC transmission lines.

SUMMARY OF THE INVENTION

The technical scheme of the present invention provides a method and a system for multi-channel all-weather measurement of the combined field strength of a DC transmission line, so as to solve the problem of how to accurately measure the combined field strength of the DC transmission line in all weather.

In order to solve the above problems, the present invention provides a method for multi-channel all-weather measurement of the composite field intensity of a DC transmission line, the method comprising:

A plurality of field mills are arranged in a set area from one side phase to the other side phase of the DC transmission line; each field mill in the plurality of field mills is marked with an address, and each field mill is combined with DC The field strength is measured in real time, the synthetic field strength measurement data of each field mill is obtained, and the synthetic field strength measurement data is sent to the host according to a predetermined time sequence;

Arrange a weather station in a safe area outside the mill, measure the weather parameters through the weather station, and send the weather parameters to the host according to a predetermined time sequence;

Arrange an atmospheric dust meter in a safe area outside the mill, obtain the particulate matter content in the air through the atmospheric dust meter, and send the particulate matter content in the air to the host according to a predetermined time sequence;

Arrange a weather phenomenon instrument in a safe area outside the mill, obtain the timing of rainfall and snowfall through the weather phenomenon instrument, and send the timing of rainfall and snowfall to the host according to a predetermined time sequence;

Based on the synthetic field strength measurement data and the meteorological parameters, the content of particulate matter in the air, and the timing of rainfall and snowfall, the relationship between the synthetic field strength measurement data and the meteorological parameter, the content of particulate matter in the air, and the timing of rainfall and snowfall is determined.

Preferably, each field grinding is designed to be waterproof, and is cleaned according to a set period, or when the content of particulate matter in the air is greater than a threshold value.

Preferably, the host computer sends control commands to all the field mills, so as to realize the synchronous measurement of the synthetic field strength by all the field mills.

Preferably, the set area should cover each 50m outside the sides on both sides, the distance between each field grinding on the outer side of the side phase is not less than 5m, and the distance between each field grinding on the inner side of the side phase is not more than 5m.

Preferably, the host is powered by a UPS power supply; the field mill, the weather station, the atmospheric dust meter and the weather phenomenon meter are powered by the UPS power supply;

The UPS power supply is converted into low-voltage direct current by the power converter to supply power for the field mill.

Based on another aspect of the present invention, the present invention provides a system for multi-channel all-weather measurement of the composite field intensity of a DC transmission line, the system comprising: a plurality of field mills, a weather station, an atmospheric dust meter, a weather phenomenon meter and a host ;

A plurality of field mills are arranged in a set area from one side phase to the other side phase of the DC transmission line; each field mill in the plurality of field mills is marked with an address, and each field mill is combined with DC The field strength is measured in real time, the synthetic field strength measurement data of each field mill is obtained, and the synthetic field strength measurement data is sent to the host according to a predetermined time sequence;

Arrange a weather station in a safe area outside the mill, measure the weather parameters through the weather station, and send the weather parameters to the host according to a predetermined time sequence;

Arrange an atmospheric dust meter in a safe area outside the mill, obtain the particulate matter content in the air through the atmospheric dust meter, and send the particulate matter content in the air to the host according to a predetermined time sequence;

Arrange a weather phenomenon instrument in a safe area outside the mill, obtain the timing of rainfall and snowfall through the weather phenomenon instrument, and send the timing of rainfall and snowfall to the host according to a predetermined time sequence;

Based on the synthetic field strength measurement data and the meteorological parameters, the content of particulate matter in the air, and the timing of rainfall and snowfall, the relationship between the synthetic field strength measurement data and the meteorological parameter, the content of particulate matter in the air, and the timing of rainfall and snowfall is determined.

Preferably, each field grinding is designed to be waterproof, and is cleaned according to a set period, or when the content of particulate matter in the air is greater than a threshold value.

Preferably, the host computer sends control commands to all the field mills, so as to realize the synchronous measurement of the synthetic field strength by all the field mills.

Preferably, the set area should cover each 50m outside the sides on both sides, the distance between each field grinding on the outer side of the side phase is not less than 5m, and the distance between each field grinding on the inner side of the side phase is not more than 5m.

Preferably, the host is powered by a UPS power supply; the field mill, the weather station, the atmospheric dust meter and the weather phenomenon meter are powered by the UPS power supply;

The UPS power supply is converted into low-voltage direct current by the power converter to supply power for the field mill.

The technical scheme of the present invention provides a method for multi-channel all-weather measurement of the combined field strength of a DC transmission line, the method comprising: arranging a plurality of fields in a set area from one side phase to the other side phase of the DC transmission line Each field grinding in the multiple field grinding is marked with an address, and each field grinding measures the DC composite field strength in real time, obtains the composite field strength measurement data of each field grinding, and divides the composite field according to a predetermined time series. The strong measurement data is sent to the host; a weather station is arranged in the safe area outside the on-site grinding, and the meteorological parameters are measured by the weather station, and the meteorological parameters are sent to the host according to the predetermined time sequence; the atmospheric dust meter is arranged in the safe area outside the on-site grinding, and the atmospheric dust The instrument obtains the content of particulate matter in the air, and sends the content of particulate matter in the air to the host according to a predetermined time sequence; a weather phenomenon instrument is arranged in a safe area outside the on-site mill, and the time of rainfall and snowfall is obtained through the weather phenomenon instrument, and the timing of rainfall and snowfall is recorded according to the predetermined time series. Send it to the host computer; determine the relationship between the synthetic field strength measurement data and meteorological parameters, the content of particulate matter in the air, and the timing of rainfall and snowfall based on the synthetic field strength measurement data and meteorological parameters, the content of particulate matter in the air, and the timing of rainfall and snowfall. The technology of the invention realizes all-weather measurement and measurement of the combined field strength of ultra-high voltage direct current transmission lines, and obtains the characteristics of the combined field strength and the relationship between the combined field strength and meteorological parameters. The acquired measurement data can be used for line optimization design and environmental protection, and at the same time provide an important basis for the monitoring, evaluation and control of the electromagnetic environment of the DC line. The technical scheme of the invention can be applied to the measurement of the DC composite field strength in the field of DC power transmission engineering in the future, as well as the monitoring, environmental protection acceptance and research of the composite field strength, with high promotion value and wide application prospect.

Description of drawings

Exemplary embodiments of the present invention may be more fully understood by reference to the following drawings:

FIG. 1 is a flow chart of a method for multi-channel all-weather measurement of combined field intensity of DC transmission lines according to a preferred embodiment of the present invention;

Fig. 2 is a system structure diagram for multi-channel all-weather measurement of composite field strength of DC transmission lines according to a preferred embodiment of the present invention; and

3 is a schematic diagram of an external power supply for field grinding according to a preferred embodiment of the present invention.

Detailed ways

Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for the purpose of this thorough and complete disclosure invention, and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings are not intended to limit the invention. In the drawings, the same elements/elements are given the same reference numerals.

Unless otherwise defined, terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is to be understood that terms defined in commonly used dictionaries should be construed as having meanings consistent with the context in the related art, and should not be construed as idealized or overly formal meanings.

FIG. 1 is a flow chart of a method for multi-channel all-weather measurement of combined field intensity of a DC transmission line according to a preferred embodiment of the present invention. The invention provides a method for multi-channel all-weather measurement of the combined field intensity of a direct current transmission line, which comprises at least one main engine, 20 field mills, one computer, two UPS power supplies, one power converter, and one weather station. , 1 set of weather phenomenon instrument, 1 set of monitoring system, 1 set of atmospheric dust meter, 1 set of remote control system. Synthetic field strength measurement is carried out through the host computer and field mill, weather station and weather phenomenon meter measure weather parameters, atmospheric dust meter measures the content of particulate matter in the air, the computer is placed on the measurement site, and the remote control system can view the measurement data at any time through the Internet, and through monitoring The system monitors site conditions. As shown in FIG. 1 , the present invention provides a method for multi-channel all-weather measurement of the combined field strength of a DC transmission line, the method comprising:

Preferably, in step 101: a plurality of field mills are arranged in a set area from one side phase to the other side phase of the DC transmission wire; each field mill in the plurality of field mills has an address mark, and each field mill is marked with an address. The field mill measures the DC composite field strength in real time, obtains the composite field strength measurement data of each field mill, and sends the composite field strength measurement data to the host according to a predetermined time sequence. In the present invention, the field grinding for measurement is arranged in the center of the distance between the flat topography of the DC transmission line, and the field grinding can be arranged from 50m outside one side of the pole conductor to the other side of the pole conductor, such as ±800kV DC transmission line. For the measurement cross-section less than 122m, if one field grinding is arranged at an interval of 5m, 25 field grindings need to be arranged. The synthetic measurement data includes measuring point location, measurement time and synthetic block strength value.

Preferably, in step 102: a weather station is arranged in a safe area outside the mill, the weather parameters are measured by the weather station, and the weather parameters are sent to the host according to a predetermined time sequence.

Preferably, in step 103: an atmospheric dust meter is arranged in a safe area outside the on-site grinding, and the content of particulate matter in the air is obtained through the atmospheric dust meter, and the content of particulate matter in the air is sent to the host according to a predetermined time sequence.

Preferably, in step 104: a weather phenomenon instrument is arranged in a safe area outside the mill, the time of rainfall and snowfall is obtained through the weather phenomenon instrument, and the timing of rainfall and snowfall is sent to the host according to a predetermined time sequence.

Preferably, in step 105: determine the relationship between the synthetic field strength measurement data and meteorological parameters, air particulate matter content and rainfall and snowfall timing based on the synthetic field strength measurement data and meteorological parameters, the content of particulate matter in the air and the timing of rainfall and snowfall.

Preferably, each field grinding is designed to be waterproof, and is cleaned according to a set period, or when the particle content in the air is greater than a threshold value.

Preferably, the host computer sends a control command to all the field mills, so as to realize the synchronous measurement of the synthetic field strength by all the field mills.

Preferably, the set area should cover each 50m outside the sides on both sides, the distance between each field grinding on the outer side of the side phase is not less than 5m, and the distance between each field grinding on the inner side of the side phase is not more than 5m.

Preferably, the host is powered by a UPS power supply; the field mill, the weather station, the atmospheric dust meter and the weather phenomenon instrument are powered by the UPS power supply; wherein the UPS power supply is converted into low-voltage direct current by a power converter to supply power for the field mill.

The invention arranges a computer, a UPS power supply and a host in a house not far from the line or a temporary building constructed. In the present invention, a monitoring system is arranged near the field grinding, and the monitoring system should be kept at a sufficient distance from the field grinding, which should not only be able to clearly monitor the on-site conditions but also should not affect the measurement results.

In the present invention, one meteorological station, one weather phenomenon instrument and one atmospheric dust instrument are arranged near the field grinding. The weather station, weather phenomenon instrument, atmospheric dust instrument and monitoring system should be kept at a sufficient distance from the field grinding, and should not only be able to clearly monitor the scene conditions and should not affect the measurement results.

In the invention, one UPS power supply and one power converter are arranged near the mill, and the direct current output by the power converter is connected with each power supply port of the mill.

Each system of the present invention supplies power and is connected for communication, and is debugged until the communication and display are normal;

The remote control system of the present invention is connected with the computer for on-site measurement;

The invention starts the measurement system and the monitoring system, and can start the measurement through the on-site computer or through the remote control to obtain the meteorological parameters at different positions, the parameters of the particulate matter in the atmosphere and the measurement results of the field grinding;

The present invention stores data and continues to measure, and the software on the computer should be able to automatically start to measure and store data;

After the invention works for a period of time, if the data is abnormal or the particulate matter content in the air is too high, the field grinding measurement can be stopped and the water gun can be cleaned in time, and the measurement should be resumed immediately after the cleaning is completed.

FIG. 2 is a system structure diagram for multi-channel all-weather measurement of the composite field intensity of a DC transmission line according to a preferred embodiment of the present invention. The invention proposes a multi-channel all-weather measurement system for the composite field intensity of a direct current transmission line. The invention solves the problem that the conventional synthetic field strength measuring device and method cannot meet the application requirements in severe weather through the waterproof and antifouling design and treatment of the probe, and realizes all-weather accurate measurement of the DC synthetic field strength. As shown in Figure 2, the present invention is a system for multi-channel all-weather measurement of combined field intensity of DC transmission lines. The system includes: a plurality of field mills, a weather station, an atmospheric dust meter, a weather phenomenon meter and a host.

Arrange multiple field mills in the set area from one side phase to the other side phase of the DC transmission line; each field mill in the multiple field mills is marked with an address, and each field mill has a combined DC field strength. Carry out real-time measurement, obtain the composite field strength measurement data of each field mill, and send the composite field strength measurement data to the host according to a predetermined time series.

A weather station is arranged in a safe area outside the mill, and the weather parameters are measured by the weather station, and the weather parameters are sent to the host according to a predetermined time sequence.

Arrange the atmospheric dust meter in the safe area outside the mill, obtain the particulate matter content in the air through the atmospheric dust meter, and send the particulate matter content in the air to the host according to a predetermined time sequence.

The weather phenomenon instrument is arranged in the safe area outside the mill, and the rainfall and snowfall time is obtained through the weather phenomenon instrument, and the rainfall and snowfall time is sent to the host according to the predetermined time sequence.

Based on the synthetic field strength measurement data and meteorological parameters, the content of particulate matter in the air, and the timing of rainfall and snowfall, the relationship between the synthetic field strength measurement data and meteorological parameters, the content of particulate matter in the air, and the timing of rainfall and snowfall was determined.

Preferably, each field grinding is designed to be waterproof, and is cleaned according to a set period, or when the particle content in the air is greater than a threshold value.

Preferably, the host computer sends a control command to all the field mills, so as to realize the synchronous measurement of the synthetic field strength by all the field mills.

Preferably, the set area should cover each 50m outside the sides on both sides, the distance between each field grinding on the outer side of the side phase is not less than 5m, and the distance between each field grinding on the inner side of the side phase is not more than 5m.

Preferably, the host is powered by a UPS power supply; the field mill, the weather station, the atmospheric dust meter and the weather phenomenon instrument are powered by the UPS power supply; wherein the UPS power supply is converted into low-voltage direct current by a power converter to supply power for the field mill.

The invention provides a system for multi-channel all-weather measurement of the combined field intensity of DC transmission lines. The system includes at least one host, 20 field mills, one computer, two UPS power supplies, one power converter, and one meteorological It consists of a station, a weather phenomenon instrument, an atmospheric dust instrument, a monitoring system, and a remote control system. The main engine and the field mill carry out the synthetic field strength measurement, the weather station and the weather phenomenon meter measure the weather parameters, the atmospheric dust meter measures the particle content in the air, the computer is placed on the measurement site, and the remote control system can view the measurement data at any time through the Internet, and through the monitoring system Monitor site conditions.

A wireless communication connection is adopted between the host and the field mill of the present invention, and the multi-point synchronous measurement of the DC composite field intensity is realized through the control of the host;

The field mill of the present invention adopts a waterproof design, which can realize all-weather measurement of the DC synthetic field intensity, and after the field mill is used for a period of time, the probe can be cleaned by washing with water. The field mill is powered by an isolated power module, with a built-in lithium battery, which can provide backup power in case of external power failure.

The present invention supplies power to the host through one UPS power supply, and another UPS power supply supplies power to the field mill, weather station, weather phenomenon instrument, and monitoring system, wherein the UPS power supply is converted into low-voltage direct current by a power converter to supply power to the field mill.

Both the computer and the remote control of the invention are connected to the Internet network, and the remote control system realizes the on-site control and inquiry of the measurement through the remote control software.

The meteorological station and visibility of the present invention can obtain the parameters of the meteorological station and the time of rainfall and snowfall, and use the same time interval as the synthetic field strength measurement and perform data storage;

The atmospheric dust meter of the present invention can obtain the content of particulate matter in the air in real time, and uses the same time interval as the synthetic field strength measurement to store data, and when the content of particulate matter in the air is high, it is reminded to clean the field grinding in time;

The computer of the invention can synchronously display and store measurement time, meteorological parameters, and DC composite field strength measurement data at different positions. The synthetic measurement data includes measuring point location, measurement time and synthetic block strength value.

The DC composite field strength control is of great significance to protect the environment and the physical and mental health of the surrounding residents. The existing DC composite field strength measurement systems are generally not waterproof, and can only be used for DC composite field strength measurement in good weather. At the same time, the measurement points are few and cannot be synchronized. Meteorological parameters, my country lacks all-weather synthetic field strength measurement results of commercial operation of ultra-high voltage DC lines, and it is difficult to meet the needs of line optimization design and environmental protection.

The multi-channel all-weather measurement system for the composite field strength of the DC transmission line established by the invention realizes the multi-point synchronous measurement of the DC composite field strength and meteorological parameters through the design, arrangement and various optimization treatments of waterproof probes, and simultaneously monitors the particulate matter in the air. Content and timely cleaning of the field grinding improve the accuracy and validity of the measurement results.

The invention can realize the all-weather measurement and measurement of the combined field strength of ultra-high voltage direct current transmission lines, and obtain the characteristics of the combined field strength and the relationship between the combined field strength and meteorological parameters. The acquired measurement data can be used for line optimization design and environmental protection, and at the same time provide an important basis for the monitoring, evaluation and control of the electromagnetic environment of the DC line. The results of the invention can be applied to the design and development of the DC composite field strength measuring device in the field of DC power transmission engineering in the future, as well as the monitoring, environmental protection acceptance and research of the composite field strength, with high promotion value and wide application prospect.

Figure 3 is a schematic diagram of the external power supply for the field mill of the present invention. The 220V voltage output by the UPS outputs low-voltage DC through the AC/DC converter, and supplies power to each field mill through the cable, thereby improving the safety of the site.

The present invention has been described with reference to a few embodiments. However, as is known to those skilled in the art, other embodiments than the above disclosed invention are equally within the scope of the invention, as defined by the appended patent claims.

Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a//the [means, component, etc.]" are open to interpretation as at least one instance of a means, component, etc., unless expressly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.

Claims (10)

1. A method for multi-channel all-weather measurement of composite field strength of DC transmission lines, the method comprising: A plurality of field mills are arranged in a set area from one side phase to the other side phase of the DC transmission line; each field mill in the plurality of field mills is marked with an address, and each field mill is combined with DC The field strength is measured in real time, the synthetic field strength measurement data of each field mill is obtained, and the synthetic field strength measurement data is sent to the host according to a predetermined time sequence; Arrange a weather station in a safe area outside the mill, measure the weather data through the weather station, and send the weather data to the host according to a predetermined time sequence; Arrange an atmospheric dust meter in a safe area outside the mill, obtain the particulate matter content in the air through the atmospheric dust meter, and send the particulate matter content in the air to the host according to a predetermined time sequence; Arrange a weather phenomenon instrument in a safe area outside the mill, obtain the timing of rainfall and snowfall through the weather phenomenon instrument, and send the timing of rainfall and snowfall to the host according to a predetermined time sequence; Based on the synthetic field strength measurement data and the meteorological parameters, the content of particulate matter in the air, and the timing of rainfall and snowfall, the relationship between the synthetic field strength measurement data and the meteorological parameter, the content of particulate matter in the air, and the timing of rainfall and snowfall is determined. 2. The method according to claim 1, wherein each field grinding is designed to be waterproof, and is cleaned according to a set period, or when the content of particulate matter in the air is greater than a threshold value. 3. The method according to claim 1, wherein the host computer sends control commands to all the field mills, so as to realize the synchronous measurement of the combined field strength by all the field mills. 4. The method according to claim 1, wherein the set area covers each 50m outside the sides on both sides, the distance between each field grinding on the outer side of the side phase is not less than 5m, and the distance between each field grinding on the inner side of the side phase is not less than 5m. The spacing is not more than 5m. 5. The method according to claim 1, supplying power to the host through a UPS power supply; supplying power to a field mill, a weather station, an atmospheric dust meter and a weather phenomenon meter through the UPS power supply; The UPS power supply is converted into low-voltage direct current by the power converter to supply power for the field mill. 6. A system for multi-channel all-weather measurement of composite field intensity of DC transmission lines, the system comprising: a plurality of field mills, a weather station, an atmospheric dust instrument, a weather phenomenon instrument and a host; A plurality of field mills are arranged in a set area from one side phase to the other side phase of the DC transmission line; each field mill in the plurality of field mills is marked with an address, and each field mill is combined with DC The field strength is measured in real time, the synthetic field strength measurement data of each field mill is obtained, and the synthetic field strength measurement data is sent to the host according to a predetermined time sequence; Arrange a weather station in a safe area outside the mill, measure the weather data through the weather station, and send the weather data to the host according to a predetermined time sequence; Arrange an atmospheric dust meter in a safe area outside the mill, obtain the particulate matter content in the air through the atmospheric dust meter, and send the particulate matter content in the air to the host according to a predetermined time sequence; Arrange a weather phenomenon instrument in a safe area outside the mill, obtain the timing of rainfall and snowfall through the weather phenomenon instrument, and send the timing of rainfall and snowfall to the host according to a predetermined time sequence; Based on the synthetic field strength measurement data and the meteorological parameters, the content of particulate matter in the air, and the timing of rainfall and snowfall, the relationship between the synthetic field strength measurement data and the meteorological parameter, the content of particulate matter in the air, and the timing of rainfall and snowfall is determined. 7. The system according to claim 6, wherein each field grinding is designed to be waterproof, and is cleaned according to a set period, or when the level of particulate matter in the air is greater than a threshold value. 8 . The system according to claim 6 , wherein the host computer sends control commands to all field mills, so as to realize synchronous measurement of synthetic field strength by all field mills. 9 . 9. The system according to claim 6, wherein the set area covers each 50m outside the sides of the two sides, the distance between each field grinding on the outer side of the side phase is not less than 5m, and the distance between each field grinding on the inner side of the side phase is not less than 5m. The spacing is not more than 5m. 10. The system according to claim 6, supplying power to the host through a UPS power supply; supplying power to a field mill, a weather station, an atmospheric dust meter and a weather phenomenon meter through the UPS power supply; The UPS power supply is converted into low-voltage direct current by the power converter to supply power for the field mill.

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