CN103246964B - Substation primary equipment safety inspection supervision method - Google Patents

Abstract

The invention discloses a method for monitoring the safety maintenance of primary equipment in a substation, comprising the following steps: measuring the distance between staff and a busbar by using live interval calculation technology; The amount of time change can be obtained directly, and the distance that the vehicle or person changes within a fixed frame can be indirectly calculated by other methods, the speed of the vehicle or person can be measured, and the alarm will be given when it exceeds the set value; the distance of the vehicle passing through can be measured The principle of instantaneous speed is that speed is equal to the ratio of distance to time; calculate the safe distance between the vehicle and personnel and equipment. The primary equipment safety inspection monitoring method of a substation provided by the present invention can be widely applied to inspection and maintenance sites, and can effectively prevent personnel from electric shock and equipment damage accidents; the realization of the inspection and maintenance monitoring method directly improves the safety inspection level of electric power enterprises.

Description

Monitoring method for primary equipment safety maintenance in substation

technical field

The invention relates to a monitoring method for safety maintenance of primary equipment in a substation, which belongs to the technical field of electric power.

Background technique

At present, the more common proximity alarm devices of the State Grid Corporation of China are mainly watch-type proximity alarms and safety helmets equipped with proximity alarms. The single function is only limited to near electric alarm, and there is no speed alarm function when vehicles and people approach the primary equipment. Future alarms will be characterized by flexibility, reliability, versatility and low cost. In the past, power transmission and distribution maintenance operations used shielded clothing, and used overhead insulated bucket trucks or ground potential indirect operations. According to the safety distance determined by the regulations, the site environment and the structural conditions of electrical equipment for live work in power distribution, it can be seen that in the live work of power transmission and distribution, indirect work should be the main method to ensure safety. Now, with the development of live working technology at home and abroad, the performance and indicators of insulation clothing are getting better and better, and insulation protection tools are more reliable and portable. In particular, foreign insulating tool products are better than domestic products, and all units basically use foreign insulating clothing and insulating protective appliances.

The current domestic live working distance alarms include watch-type near-electric alarms and safety helmets equipped with near-electric alarms, as well as less-used infrared anti-radiation alarms and safety alarm devices for complex live-work electric construction.

At present, domestic live working distance alarms include watch-type near-electric alarms and safety helmets equipped with near-electric alarms, as well as less-used infrared anti-radiation alarms and safety alarm devices for complex live-work electric construction. The function of the former is limited to the proximity alarm, but the proximity induction alarm does not provide early warning for DC, high frequency and static electricity, while the latter has higher cost and technical requirements. For example, the wireless infrared alarm produced by Shanghai Yujie Technology belongs to the infrared anti-radiation alarm. The characteristic of this device is that it needs to install anti-theft device and microcomputer control. It is mainly used in anti-theft alarm at present. In addition, Nanjing Ziruan Information Technology Co., Ltd. has cooperated with the national electrical industry department to develop a new type of high-voltage electric equipment anti-shock early warning system. The shortcoming of this system is that the cost of hardware equipment for analyzing and processing the monitoring signal at the front end is relatively high.

Foreign professional image analysis systems with the function of measuring distance, such as Image-ProPlus is a top-level image analysis system package, which contains extremely rich measurement tools. There is also a speed measurement system RCSpeedTest that can run on the ios system. However, the functions of the two systems for live on-site operation are single, and cannot effectively prevent operators from entering the live compartment by mistake and the occurrence of electric shock accidents. At present, a similar intelligent ranging system SmartDistanceProv2.1.6 has been developed for Android phones on the market. The function of this system is to measure the distance between the operator and the target object according to the input target height, and also use video clips to measure the speed of movement. There is also the SmartMeasure system, which can calculate the height of the target object when the contact point between the target object and the ground and the highest point of the object are photographed. These two systems belong to the tool system, which occupy less memory, are easy to operate, and are flexible.

All in all, no matter domestic or foreign, there is no multi-functional system of charged distance alarm and speed test. Carrying a special proximity alarm device to ensure safe operation or hardware with only a single proximity distance measurement function is no longer suitable for current safety inspections. We combined the existing technology and our own situation, and innovatively proposed a safety monitoring method for equipment maintenance.

Contents of the invention

Purpose: In order to overcome the deficiencies in the prior art, the present invention provides a monitoring method for the safety inspection and maintenance of primary equipment in substations.

Technical solution: In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is:

A monitoring method for safety inspection and maintenance of primary equipment in a substation, comprising the following steps:

Step (1): Measure the distance between the staff and the bus by using the electrified interval calculation technology: first calculate the horizontal distance between the mobile phone and the staff, then calculate the height of the staff, subtract the height of the staff from the height of the bus to get the distance between the staff and the bus The actual distance will alarm when it is less than the safe distance; the distance between the measuring staff and the bus can be obtained by using the Pythagorean theorem;

Step (2): Use video speed measurement technology to measure the instantaneous speed of the vehicle passing by: the time change can be directly obtained through the fixed frame time of the video signal, and the time change of the vehicle or person within the fixed frame can be calculated indirectly through other methods Distance, measure the speed of the vehicle or person, and alarm when it exceeds the set value; the principle of measuring the instantaneous speed of the vehicle is that the speed is equal to the ratio of distance to time;

Step (3) Calculate the safety distance between the vehicle and personnel and equipment.

The step (1) specifically refers to: lock the three points on the straight line between the ground, personnel or helmet and the busbar in the shot; according to the proportional relationship between the straight line segment in the shot and the proportional relationship between the distance in the shot and the actual distance, Calculate the actual distance between the personnel and the equipment; among them, the position of the monitoring personnel must ensure that the ground, personnel and accessible bus parts are in the middle of the lens and in a straight line;

Calculate the distance between the person or helmet and the busbar in the shot: calculate the distance in the shot between the accessible part of the busbar locked in the previous step and the two points of the person;

Calculate the actual distance between the person or helmet and the bus according to the ratio of the actual height of the bus to the ground and their distance in the shot;

Calculate the distance every once in a while, and send an alarm when the actual distance is less than the set safety distance.

The step (2) specifically refers to:

Determine the mapping function F(S1) of the position of S1 at T1 time, after a fixed frame time ⊿T, determine the mapping function F(S2) of the position of S2 at T2 time; assuming that the lens is fixed, the pixels in the two frames of images and With the corresponding comparability, the positions S1 and S2 of the corresponding points in the two images are respectively located;

Calculate the driving speed of the vehicle V=(F(S2)-F(S1))/⊿T; according to the corresponding point positions S1 and S2 located in the previous step, subtract them to obtain the pixel distance that changes within the corresponding time;

Determine the functional relationship between pixel distance and actual distance, and calculate the actual vehicle speed per hour.

The step (3) specifically refers to:

Lock the front of the car, the rear of the car and the three points of the equipment on the straight line in the lens; calculate the actual distance between the person and the equipment according to the proportional relationship between the straight line segment in the lens and the proportional relationship between the distance in the lens and the actual distance; among them, The position of the monitoring personnel should ensure that the front or rear of the vehicle and the equipment are in the middle of the lens and in a straight line;

Calculate the distance between the rear of the vehicle or the front of the vehicle and the equipment in the lens; prepare for calculating the actual distance between the vehicle and the equipment; calculate the distance in the lens between the two points locked in the previous step, the front of the vehicle, the rear of the vehicle, and the equipment;

Based on the ratio of the actual length of the vehicles to their distance in the shot, the actual distance between the rear or front of the vehicle and the device is calculated.

Beneficial effects: The safety inspection and maintenance monitoring method for primary equipment in substations provided by the present invention not only proposes new ideas and new methods for ensuring safety maintenance, but also helps to improve the safety production level of electric power enterprises, and plays a positive role in the near-electrical alarm technology. The role of promotion; it can be widely used in the field of maintenance monitoring. As long as the supervisor downloads this system, he can supervise the operator, effectively preventing the occurrence of electric shock and equipment damage accidents; the realization of the maintenance monitoring method directly improves the power enterprise The level of safety maintenance has a positive role in promoting the technological transformation and future development of enterprises.

detailed description

Below in conjunction with embodiment the present invention will be further described.

A monitoring method for safety inspection and maintenance of primary equipment in a substation, comprising the following steps:

Step (1): Measure the distance between the staff and the bus by using the electrified interval calculation technology: first calculate the horizontal distance between the mobile phone and the staff, then calculate the height of the staff, subtract the height of the staff from the height of the bus to get the distance between the staff and the bus The actual distance will alarm when it is less than the safe distance; the distance between the measuring staff and the bus can be obtained by using the Pythagorean theorem;

Step (2): Use video speed measurement technology to measure the instantaneous speed of the vehicle passing by: the time change can be directly obtained through the fixed frame time of the video signal, and the time change of the vehicle or person within the fixed frame can be calculated indirectly through other methods Distance, measure the speed of the vehicle or person, and alarm when it exceeds the set value; the principle of measuring the instantaneous speed of the vehicle is that the speed is equal to the ratio of distance to time;

Step (3) Calculate the safety distance between the vehicle and personnel and equipment.

The step (1) specifically refers to: lock the three points on the straight line between the ground, personnel or helmet and the busbar in the shot; according to the proportional relationship between the straight line segment in the shot and the proportional relationship between the distance in the shot and the actual distance, Calculate the actual distance between the personnel and the equipment; among them, the position of the monitoring personnel must ensure that the ground, personnel and accessible bus parts are in the middle of the lens and in a straight line;

Calculate the distance between the person or helmet and the busbar in the shot: calculate the distance in the shot between the accessible part of the busbar locked in the previous step and the two points of the person;

Calculate the actual distance between the person or helmet and the bus according to the ratio of the actual height of the bus to the ground and their distance in the shot;

Calculate the distance every once in a while, and send an alarm when the actual distance is less than the set safety distance.

The step (2) specifically refers to:

Determine the mapping function F(S1) of the position of S1 at T1 time, after a fixed frame time ⊿T, determine the mapping function F(S2) of the position of S2 at T2 time; assuming that the lens is fixed, the pixels in the two frames of images and With the corresponding comparability, the positions S1 and S2 of the corresponding points in the two images are respectively located;

Calculate the driving speed of the vehicle V=(F(S2)-F(S1))/⊿T; according to the corresponding point positions S1 and S2 located in the previous step, subtract them to obtain the pixel distance that changes within the corresponding time;

Determine the functional relationship between pixel distance and actual distance, and calculate the actual vehicle speed per hour.

The step (3) specifically refers to:

Lock the front of the car, the rear of the car and the three points of the equipment on the straight line in the lens; calculate the actual distance between the person and the equipment according to the proportional relationship between the straight line segment in the lens and the proportional relationship between the distance in the lens and the actual distance; among them, The position of the monitoring personnel should ensure that the front or rear of the vehicle and the equipment are in the middle of the lens and in a straight line;

Calculate the distance between the rear of the vehicle or the front of the vehicle and the equipment in the lens; prepare for calculating the actual distance between the vehicle and the equipment; calculate the distance in the lens between the two points locked in the previous step, the front of the vehicle, the rear of the vehicle, and the equipment;

Based on the ratio of the actual length of the vehicles to their distance in the shot, the actual distance between the rear or front of the vehicle and the device is calculated.

The safety inspection and maintenance monitoring method for primary equipment in substations provided by the invention not only proposes new ideas and new methods to ensure safety inspections, but also helps to improve the safety production level of electric power enterprises, and plays a positive role in promoting the near-electricity alarm technology ;It can be widely used in the field of maintenance monitoring. As long as the supervisor downloads this system, the operator can be supervised, effectively preventing the occurrence of electric shock and equipment damage accidents; the realization of the maintenance monitoring method directly improves the level of safety maintenance of electric power enterprises , It has a positive role in promoting the technological transformation and future development of enterprises.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also possible. It should be regarded as the protection scope of the present invention.

Claims (1)

1. a substation primary equipment safety inspection supervision method, comprises the following steps:

Step (1): utilize the distance of charged interval calculation commercial measurement staff and bus: locking ground, staff and bus in mobile lens is three points on straight line; According to the proportionate relationship of mobile lens cathetus section and the proportionate relationship of mobile lens middle distance and actual range, calculate the actual range between staff and bus; Wherein, the position of monitoring personnel must ensure that ground, staff and the bus part that can contact are in the centre of mobile lens, and point-blank;

Calculate once distance at set intervals, when actual range is less than the safe distance between the staff of setting and bus time, send warning;

Step (2): utilize the instantaneous velocity that video frequency speed-measuring commercial measurement vehicle passes through:

Directly can obtain time variation amount by the fixing inter frame temporal of vision signal, and indirectly calculate the distance of vehicle change in anchor-frame by the following method, measure the speed of vehicle:

1) determine the mapping function F (S1) of T1 moment S1 position, through fixing frame time ⊿ T, determine the mapping function F (S2) of T2 moment S2 position; Mobile lens is fixed, and the pixel in two two field pictures has corresponding comparability, navigates to corresponding point position S1 and S2 in two images respectively;

2) travel speed V=(F (S2)-F (S1) the)/⊿ T of vehicle is calculated; According to corresponding point position S1 and S2 of location, subtract each other the pixel distance obtaining changing within the corresponding time;

3) determine the funtcional relationship between pixel distance and actual range, and calculate actual vehicle traveling speed per hour;

When the vehicle traveling speed per hour of reality exceedes setting value alarm;

The principle of the instantaneous velocity that measuring vehicle is passed through is the ratio that speed equals distance and time;

Step (3) calculates vehicle and safe distance between staff and equipment, specifically refers to:

Headstock, the tailstock and equipment three points on straight line are locked in mobile lens; According to the proportionate relationship of mobile lens cathetus section and the proportionate relationship of mobile lens middle distance and actual range, calculate the actual range between staff and equipment; Wherein, the position of monitoring personnel will ensure that headstock or the tailstock, equipment are in the centre of mobile lens, and point-blank;

Calculate the tailstock or the distance between headstock and equipment in mobile lens; For the actual range calculated between vehicle and equipment is prepared; Calculate the headstock of locking or the distance between the tailstock and equipment 2 in mobile lens;

According to the ratio of the physical length of vehicle and their distances in mobile lens, calculate the tailstock or the actual range between headstock and equipment.