CN208872806U - A device for identifying voltage levels of high-voltage direct current transmission lines - Google Patents

Abstract

Embodiments of the present application provide a device for identifying voltage levels of a high-voltage direct current transmission line, including an automatic measurement module, a manual measurement module, a power supply, a main switch, and a manual measurement switch. The automatic measurement module includes a first field strength sensor and an alarm, and the first field strength sensor is electrically connected to the alarm; the manual measurement module includes a ranging sensor, a signal processor, a display, and a plurality of second field strength sensors, ranging sensors, The plurality of second field strength sensors and displays are all electrically connected to the signal processor; the power supply is electrically connected to the main switch, the main switch is electrically connected to the automatic measurement module and the manual measurement switch, and the manual measurement switch is electrically connected to the manual measurement module. The embodiment of the present application can perform real-time measurement and alarm on the electric field strength in the low power consumption mode, and the manual measurement module can accurately measure the electric field strength, the distance between the current position and the charged equipment, and thus identify the voltage level, and realize comprehensive, Precise proximity warning.

Description

A device for identifying voltage levels of high-voltage direct current transmission lines

technical field

The present application relates to the technical field of high-voltage direct current operations, and in particular, to a device for identifying voltage levels of high-voltage direct current transmission lines.

Background technique

When a DC transmission line operates, the electric charges on the wires will create an electric field in space. The electric field generated by the HVDC transmission line is relatively large, which brings potential safety hazards to the electric workers on the HVDC site. In order to avoid the occurrence of electric shock accidents, it is very important to carry out accurate near-electricity early warning.

At present, non-contact early warning devices, such as high-voltage early-warning watches, non-contact high-voltage electricity detection warning pens, high-voltage early warning devices, and near-electrical alarms, are usually used for early warning. The working principle of these early warning devices is to check the electric field strength at the location of the electric worker, and sound and light alarms will be issued when the nearby operator exceeds the threshold.

However, the above-mentioned early warning device only takes a fixed threshold as the standard, and cannot know the voltage level of the live equipment. The safety distance of different voltage levels is different, and the relationship between safety distance and voltage level is not linear. For example, the safety distance of ±500kV is 6m, and the safety distance of ±800kV is 9.3m. It is impossible to accurately judge whether the electric power operator is in the electric field according to the strength of the electric field. within a safe distance. Therefore, under different voltage levels, the existing early warning equipment may be too far away or too close to the live equipment when it alarms. Too far away will hinder normal work, and if it is too close, an electric shock accident may occur. In addition, the above-mentioned early warning device is only suitable for AC power inspection, not for DC power inspection.

Utility model content

The present application provides a device for identifying the voltage level of a high-voltage direct current transmission line, so as to solve the problem of near-electricity early warning in high-voltage direct current operation.

The present application provides a device for identifying voltage levels of high-voltage direct current transmission lines, the device includes: an automatic measurement module, a manual measurement module, a power supply, a main switch and a manual measurement switch, wherein,

The automatic measurement module includes a first field strength sensor and an alarm, and the first field strength sensor is electrically connected to the alarm;

The manual measurement module includes a ranging sensor, a signal processor, a display, and a plurality of second field strength sensors, and the ranging sensor, the plurality of the second field strength sensors, and the display are all electrically connected to the signal processor ;

The power supply is electrically connected to the main switch, the main switch is electrically connected to the automatic measurement module and the manual measurement switch, and the manual measurement switch is electrically connected to the manual measurement module.

Preferably, the second field strength sensor includes an electric field information acquisition module, a signal amplification module, a rectification module, a filter module and an analog-to-digital conversion module that are electrically connected in sequence.

Preferably, the manual measurement switch includes an electric field measurement switch and a distance measurement switch, the electric field measurement switch is electrically connected to a plurality of the second field strength sensors, and the distance measurement switch is electrically connected to the distance measurement sensor.

Preferably, a voice broadcast module is also included, and the voice broadcast module is electrically connected to the signal processor.

Preferably, the automatic measurement module further includes an alarm switch, and the alarm switch is electrically connected between the first field strength sensor and the alarm.

Preferably, the ranging sensor includes any one or more of a laser ranging sensor, a GPS ranging sensor, a radar ranging sensor and an ultrasonic ranging sensor.

The beneficial effects of the device for identifying the voltage level of a HVDC transmission line provided by the present application include:

The device for identifying the voltage level of a high-voltage direct current transmission line provided by the present application includes an automatic measurement module, a manual measurement module, a power supply, a main switch, and a manual measurement switch. After the main switch is turned on, the automatic measurement module keeps running. The automatic measurement module includes the first field strength sensor and an alarm, which can measure the electric field strength at the location of the operator in real time. The automatic measurement module has a simple structure and low power consumption. , which can keep running for a long time; when the automatic measurement module alarms, the manual measurement module can be activated through the manual measurement switch to accurately measure the electric field strength and the distance between the current position and the charged equipment. The voltage level can be calculated from the distance between them, so that the operator can determine whether they can continue to approach the live equipment or need to stay away from the live equipment according to the safety distance under the voltage level. .

Description of drawings

In order to illustrate the technical solutions of the present application more clearly, the accompanying drawings that need to be used in the embodiments will be briefly introduced below. Other drawings can also be obtained from these drawings.

1 is a schematic structural diagram of a device for identifying a voltage level of a high-voltage direct current transmission line according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a second field strength sensor according to an embodiment of the present application.

Detailed ways

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described The embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present application.

The embodiment of the present application provides a device for identifying the voltage level of a high-voltage DC transmission line, which can be worn on the operator's arm or hung on the operator's chest to realize a near-electricity early warning function at a high-voltage DC operation site.

Referring to FIG. 1 , a schematic structural diagram of a device for identifying voltage levels of high-voltage DC transmission lines provided by an embodiment of the present application is shown. As shown in FIG. 1 , the device for identifying voltage levels of high-voltage DC transmission lines provided by an embodiment of the present application includes an automatic measurement module , Manual measurement module, power supply, main switch and manual measurement switch.

Specifically, the power supply is electrically connected to the main switch, the main switch is electrically connected to the automatic measurement module and the manual measurement switch respectively, and the manual measurement switch is electrically connected to the manual measurement module.

The automatic measurement module includes a first field strength sensor and an alarm, and the first field strength sensor is electrically connected to the alarm.

The manual measurement module includes a signal processor, a ranging sensor electrically connected with the signal processor, a voice broadcast module, a display and a plurality of second field strength sensors.

Ranging sensors include any one or more of laser ranging sensors, GPS ranging sensors, radar ranging sensors and ultrasonic ranging sensors, which are used to measure the location of the operator and the live equipment (including distance between HVDC transmission lines).

For the second field strength sensor, please refer to FIG. 2 , which is a schematic structural diagram of a second field strength sensor provided by an embodiment of the present application. As shown in FIG. 2 , the second field strength sensor includes an electric field information collection module, a signal Amplification module, rectifier module, filter module and analog-to-digital conversion module.

The electric field information acquisition module collects the electric field strength signal at the measurement point and sends it to the signal amplification module; the signal amplification module amplifies the electric field strength signal, which is convenient for further analysis and processing, and the signal amplification module sends the processed signal to the rectification module ; The rectifier module offsets the signal sent by the signal amplification module, which is convenient for the analog-to-digital conversion module to collect, and the rectifier module sends the processed signal to the filter module; the filter module includes a low-pass filter to filter the signal sent by the rectifier module. , thereby improving the accuracy of subsequent signal processing and analysis, the rectifier module sends the processed signal to the analog-to-digital conversion module; the analog-to-digital conversion module converts the signal sent by the rectifier module into a digital signal, which is convenient for the signal processor to process.

In this embodiment of the present application, the first field strength sensor can be selected from the same sensor as the second field strength sensor.

The signals collected by the distance measuring sensor and the plurality of second field strength sensors are sent to the signal processor for processing, and the signal processor can send the electric field strength collected by the second field strength sensor and the distance collected by the distance measuring sensor to the display for display and display. / or voice broadcast module to broadcast.

The signal processor can average the signals collected by the plurality of second field intensity sensors, and then send it to the display for display and/or the voice broadcast module for broadcast. In the embodiment of the present application, a plurality of second field strength sensors are used to measure the electric field strength and obtain an average value, which effectively improves the accuracy of the electric field strength measurement.

Further, the manual measurement switch includes an electric field measurement switch and a distance measurement switch, the electric field measurement switch is electrically connected with the plurality of second field intensity sensors, and the distance measurement switch is electrically connected with the distance measurement sensor. The operator can measure the strength of the electric field through the electric field measurement switch, and measure the distance between the current position and the live equipment through the distance measurement switch, which is highly flexible and meets the various practical operation needs of the operator.

The automatic measurement module further includes an alarm switch, which is electrically connected between the first field strength sensor and the alarm. In this embodiment, multiple thresholds can be set for the first field strength sensor, and the alarm can optionally have two or more alarm functions. When the electric field strength reaches different thresholds, the alarm can be triggered to give a corresponding alarm. Alert workers.

In the embodiment of the present application, the voltage level of the current HVDC operation can be identified according to the distance measured by the ranging sensor and the electric field intensity measured by the second field strength sensor, and the specific method is as follows:

In the experimental environment of different known voltage levels in advance, use the identification device provided by this application to gradually approach the charged equipment, record the electric field strength at different distances between the measurement position and the charged equipment, and plot multiple sets of measurement data including distance and electric field strength. fit, and then calculate the functional relationship between the electric field strength and distance under different voltage levels, and store these functional relationships in the signal processor of the identification device provided by this application; The identification device, selects a plurality of measurement points at different positions, respectively measures the electric field strength and the distance between the measurement point and the charged equipment, obtains the electric field strength measurement value and the distance measurement value, and the signal processor brings one of them into the multiple The functional relationship between electric field strength and distance under different voltage levels, calculate the corresponding function calculation value, compare the function calculation value with the corresponding electric field strength measurement value or distance measurement value calculation value, and the function relationship corresponding to the function relationship value with the smallest error The formula is the functional relationship under the current voltage level, so as to obtain the voltage level of the current HVDC operation site.

Since different voltage levels correspond to different safety distances, workers can determine whether they are outside the safe distance and whether they can continue to approach the live equipment according to the current voltage level and the current distance from the live equipment, thus realizing high-voltage direct current. Comprehensive and accurate near-electricity early warning on site.

It can be seen from the above embodiments that the device for identifying the voltage level of a HVDC transmission line provided by the present application includes an automatic measurement module, a manual measurement module, a power supply, a main switch, and a manual measurement switch. After the main switch is turned on, the automatic measurement module keeps running. The automatic measurement module includes the first field strength sensor and an alarm, which can measure the electric field strength at the location of the operator in real time. The automatic measurement module has a simple structure and low power consumption. , can keep running for a long time; when the automatic measurement module alarms, the manual measurement module can be activated through the manual measurement switch to accurately measure the electric field strength and the distance between the current position and the charged equipment, according to the electric field strength and the current position and the charged equipment The distance between them can identify the voltage level, so that the operator can determine whether they can continue to approach the live equipment or need to stay away from the live equipment according to the safety distance under the voltage level, and realize the comprehensive and accurate near-electricity early warning function of the high-voltage DC field. .

Since the above embodiments are all cited and combined with other modes for description, different embodiments all have the same parts, and the same and similar parts among the various embodiments in this specification can be referred to each other. It will not be elaborated here.

It should be noted that, in this specification, relational terms such as "first" and "second" etc. are only used to distinguish one entity or operation from another entity or operation, and are not necessarily required or implied Any such actual relationship or ordering exists between these entities or operations. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a circuit structure, article or device comprising a list of elements includes not only those elements, but also not expressly listed Other elements, or elements inherent to such a circuit structure, article, or device are also included. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in the circuit structure, article or device that includes the element.

Other embodiments of the present application will readily suggest themselves to those skilled in the art upon consideration of the specification and practice of the disclosure of the invention herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of this application and include common knowledge or common sense in the technical field not disclosed in this application means. The specification and examples are to be regarded as exemplary only, with the true scope and spirit of the application being indicated by the content of the claims.

The above-described embodiments of the present application do not limit the protection scope of the present application.

Claims (6)

1. a high-voltage direct current transmission line voltage level identification device, is characterized in that, comprises automatic measurement module, manual measurement module, power supply, main switch and manual measurement switch, wherein, The automatic measurement module includes a first field strength sensor and an alarm, and the first field strength sensor is electrically connected to the alarm; The manual measurement module includes a ranging sensor, a signal processor, a display, and a plurality of second field strength sensors, and the ranging sensor, the plurality of the second field strength sensors, and the display are all electrically connected to the signal processor ; The power supply is electrically connected to the main switch, the main switch is electrically connected to the automatic measurement module and the manual measurement switch, and the manual measurement switch is electrically connected to the manual measurement module. 2. The device for identifying the voltage level of a high-voltage direct current transmission line according to claim 1, wherein the second field strength sensor comprises an electric field information acquisition module, a signal amplification module, a rectification module, a filter module and a module that are electrically connected in sequence. digital conversion module. 3 . The device for identifying the voltage level of a HVDC transmission line according to claim 1 , wherein the manual measurement switch comprises an electric field measurement switch and a distance measurement switch, and the electric field measurement switch is associated with a plurality of the second field strengths. 4 . The sensor is electrically connected, and the distance measuring switch is electrically connected with the distance measuring sensor. 4 . The device for identifying the voltage level of a high-voltage direct current transmission line according to claim 1 , further comprising a voice broadcast module, the voice broadcast module being electrically connected to the signal processor. 5 . 5. The device for identifying the voltage level of a HVDC transmission line according to claim 1, wherein the automatic measurement module further comprises an alarm switch, and the alarm switch is electrically connected between the first field strength sensor and the alarm. between. 6. The device for identifying the voltage level of a HVDC transmission line according to claim 1, wherein the ranging sensor comprises any one of a laser ranging sensor, a GPS ranging sensor, a radar ranging sensor and an ultrasonic ranging sensor. one or more sensors.