CN103344284A - Test method for manual intervention of freezing rain in distribution network glaze feature region - Google Patents

Abstract

The invention introduces a test method for artificially intervening freezing rain in the characteristic area of rime in the power grid, which includes the following steps: (1) equipped with anti-aircraft guns and test objects; (2) launching at high altitude in the characteristic area of rime in the power grid; Test area, comparison test area; (4) Set up the lead frame to place the wires; (5) Arrive at the test area 12 hours before the freezing rain; (6) Wait for the freezing rain and launch shells; (7) Import the data into the table for comparison; ( 8) Repeat steps (5) to (7); (9) Compare the ice density of the affected test area and the comparative test area. This method: 1) is simple and easy to operate; 2) can provide guidance for artificially intervening rime experiments; 3) can obtain and compare the changes of artificially intervening rime; The application provides the basis.

Description

Experimental method of manual intervention in freezing rain in the characteristic area of rime in power grid

technical field

The invention belongs to the technical field of electrical engineering, and relates to a test method for artificially intervening freezing rain in a characteristic area of rime in a power grid.

Background technique

Icing is a disaster that seriously threatens the safe operation of the power grid. The ice disaster in the southern region in 2008 caused a large number of transmission lines to collapse and break down, interrupting power transmission, causing direct economic losses of billions of yuan, and seriously affecting the safe operation of the power grid. and the normal life of the masses.

And the rime is the most important reason for the icing of the power grid and the tower disconnection. At present, the response to the icing of the power grid is only to carry out the ice-melting work for the icing of the transmission line. An effective method to prevent the formation of rime by artificial intervention before formation. For this reason, in areas where there are many freezing rain meteorological conditions in Hunan Province, it is limited to focusing on the characteristic areas of grid rain, artificially intervening in the freezing rain process of grid rain characteristic areas, intervening in transmission lines, substations, towers, buildings, plants, etc. The experiment on the formation of rime, collected observation data of temperature and humidity, wind speed, wind direction, rainfall, snow volume, ice cover amount, ice cover form and other aspects before and after the operation, and studied the relationship between freezing rain amount, temperature, humidity, wind force and wind direction, etc. The relationship between the effect of rime artificial intervention, and comparative analysis of meteorological observation data and rime observation data inside and outside the intervention area. And give a technical evaluation on the role of artificial intervention in the rainy rime characteristic area of the power grid.

Contents of the invention

The technical problem to be solved by the present invention is to provide a test method for artificially intervening freezing rain in the characteristic area of the power grid's rime in view of the backward situation that there is no method that can artificially prevent the formation of rime. By this method, artificial prevention of rime formation can be carried out. The test provides guidance for the anti-icing work of transmission lines.

The technical solution of the present invention is that the artificial intervention freezing rain test method in this grid rime characteristic area includes the following steps:

(1) Equipped with one anti-aircraft gun. Equipped with a tube-loaded test object filled with silver iodide aerosol particles, the diameter of the tube-packed test object matches the bore diameter of the equipped anti-aircraft gun;

(2) Move the anti-aircraft gun prepared in step (1) to the rime characteristic area of the freezing rain power grid to be manually intervened, and use the anti-aircraft gun to launch the prepared tube-loaded test object to high altitude. Observe the experimental effect of the tube-loaded test object being transformed into ice particles by the freezing rain after being shot high into the sky. Determine the chemical composition of the ice particles, find out the components that have the ability to quickly condense high-altitude water droplets, fill the cylinder with this composition material to form a shell that can quickly condense freezing rain and become ice particles falling from the sky;

(3) Select a highland as the next anti-aircraft gun launch point in the above-mentioned characteristic area of rime in the frozen rain power grid to be manually intervened, and delineate a 2km downwind direction of the anti-aircraft gun launch point and a 5km downwind direction of the anti-aircraft gun launch point. The area with a diameter of Ф1-2km is used as the impact test area. Then, delineate an area with a diameter of Ф1-2 km at the 1 km upwind direction of the antiaircraft gun launch point as a comparative test area;

(4) Set up a lead frame in each of the three test areas demarcated in step (3), and place a lead wire in the east-west direction and a lead wire in the north-south direction on the lead frame respectively;

(5) 24 hours before the start of the test, learn about the weather forecast of each test area delineated in step (3) through the local meteorological department. Once the freezing rain occurrence time is known, the test participants should be informed to arrive at the three test areas 12 hours before the freezing rain occurs, and the temperature and humidity of the test area should be recorded every 1 hour from the time the test participants arrive at the test area , wind speed, rainfall, rainfall pattern, ice density and the ice thickness of the wire placed in step (4);

(6) Waiting for the freezing rain, once the freezing rain is found in the sky, immediately use the antiaircraft gun transferred in step (2) to launch the shells loaded in the barrel filled in step (1);

(7) After 8 hours, record the temperature, humidity, wind speed, rainfall, rainfall pattern, icing density and the icing of the wires placed in step (4) in the two impact test areas delineated in step (3). Thickness data, and the temperature, humidity, wind speed, rainfall, rainfall pattern, ice coating density and the ice coating thickness data of the wires placed in step (4) recorded in a comparative test area delineated in step (3), imported into the table comparing;

(8) Repeat steps (5) to (7) twice;

(9) According to the precipitation form of the above-mentioned impact test area and the precipitation form of the comparison test area shown in the comparison result obtained in step (7), if the precipitation form of the impact test area is ice particles, the precipitation form of the comparison test area is freezing rain , it indicates that the manual intervention freezing rain test in the rime characteristic area of the power grid has been successfully completed, otherwise it indicates that the manual intervention freezing rain test in the rainy rime characteristic area of the power grid has failed. Or, comparing the ice coating density of the above-mentioned impact test area and the ice coating density of the comparative test area, if the ice coating density of the impact test area becomes smaller, and the ice coating thickness of the placed wires is also significantly reduced, it also shows that the The artificial intervention freezing rain test in the rime characteristic area of the power grid has been successfully completed, otherwise it indicates that the manual intervention freezing rain test in the rain rime characteristic area of the power grid has failed.

Record all the statistical data of the impact test area and the comparative test area, each data is made into a corresponding curve according to the change of time, compare the data curves of the impact test area and the comparative test area, if the temperature, humidity, wind speed, rainfall change Large, significant changes in rainfall pattern, ice density, and ice thickness indicate that the experiment is very successful. The data can also be analyzed to obtain the artificial intervention freezing rain test report in the rime characteristic area of the power grid to be artificially intervened in freezing rain, that is, under the same meteorological conditions, the different ice-covered form changes and different ice-covered density changes in the affected test area and the comparative test area And different ice thickness changes, and even the technical evaluation of the role of artificial intervention in the freezing rain power grid rime characteristic area.

The beneficial effects of the present invention are:

1) The test method is simple and easy to operate;

2) It can provide guidance for the artificial intervention rain rime test;

3) Using this test method, it is possible to obtain and compare the changes of artificially intervened rime under the same meteorological conditions, in the test affected area and in the test comparison area with different ice forms, different ice densities and different conductor ice thicknesses;

4) Under the same meteorological conditions, the artificially intervened freezing rain obtained by this method compares the ice-covered form, ice-covered density, and ice-coated thickness of the wires in the test-affected area and the test comparison area, which is the artificial rime-covered area of the power grid. The practical application of intervening freezing rain provides a basis.

Detailed ways

Example 1:

(1) Equipped with one anti-aircraft gun. Equipped with a tube-loaded test object filled with silver iodide aerosol particles, the diameter of the tube-packed test object matches the bore diameter of the equipped anti-aircraft gun.

(2) Move the anti-aircraft gun prepared in step (1) to the rime characteristic area of the freezing rain power grid to be manually intervened, and use the anti-aircraft gun to launch the prepared tube-loaded test object to high altitude. Observe the experimental effect of the tube-loaded test object being transformed into ice particles by the freezing rain after being shot high into the sky. Determine the chemical composition of the ice particles, find out the components that have the ability to quickly condense high-altitude water droplets, fill the cylinder with this composition material to form a shell that can quickly condense freezing rain and become ice particles falling from the sky;

(3) Select a highland as the next anti-aircraft gun launch point in the above-mentioned characteristic area of rime in the frozen rain power grid to be manually intervened, and delineate a 2km downwind direction of the anti-aircraft gun launch point and a 5km downwind direction of the anti-aircraft gun launch point. The area with a diameter of Ф1km is used as the impact test area. Then, define an area with a diameter of Ф1 km at 1 km upwind of the antiaircraft gun launch point as a comparative test area;

(4) Set up a lead frame in each of the three test areas demarcated in step (3), and place a lead wire in the east-west direction and a lead wire in the north-south direction on the lead frame respectively;

(5) 24 hours before the start of the test, learn about the weather forecast of each test area delineated in step (3) through the local meteorological department. Once the freezing rain occurrence time is known, the test participants should be informed to arrive at the three test areas 12 hours before the freezing rain occurs, and the temperature and humidity of the test area should be recorded every 1 hour from the time the test participants arrive at the test area , wind speed, rainfall, rainfall pattern, ice density and the ice thickness of the wire placed in step (4);

(6) Waiting for the freezing rain, once the freezing rain is found in the sky, immediately use the antiaircraft gun transferred in step (2) to launch the shells loaded in the barrel filled in step (1);

(7) After 8 hours, record the temperature, humidity, wind speed, rainfall, rainfall pattern, icing density and the icing of the wires placed in step (4) in the two impact test areas delineated in step (3). Thickness data, and the temperature, humidity, wind speed, rainfall, rainfall pattern, ice coating density and the ice coating thickness data of the wires placed in step (4) recorded in a comparative test area delineated in step (3), imported into the table comparing;

(8) Repeat steps (5) to (7) twice;

(9) According to the precipitation form of the above-mentioned impact test area and the precipitation form of the comparison test area shown in the comparison result obtained in step (7), if the precipitation form of the impact test area is ice particles, the precipitation form of the comparison test area is freezing rain , it indicates that the manual intervention freezing rain test in the rime characteristic area of the power grid has been successfully completed, otherwise it indicates that the manual intervention freezing rain test in the rainy rime characteristic area of the power grid has failed.

Example 2:

Steps (1) to (2) are the same as in Example 1;

(3) Select a highland as the next anti-aircraft gun launch point in the above-mentioned characteristic area of rime in the frozen rain power grid to be manually intervened, and delineate a 2km downwind direction of the anti-aircraft gun launch point and a 5km downwind direction of the anti-aircraft gun launch point. The area with a diameter of Ф2km is used as the impact test area. Then, define an area with a diameter of Ф2 km at 1 km upwind of the antiaircraft gun launch point as a comparative test area;

Steps (4) to (8) are the same as in Example 1;

(9) Comparing the ice density of the above-mentioned impact test area with the ice density of the comparative test area, if the ice density of the impact test area becomes smaller, and the ice thickness of the placed wires is also significantly reduced, it means The manual intervention freezing rain test in the grid rime characteristic area was successfully completed, otherwise it means that the manual intervention freezing rain test in the grid rain feature area failed.

Claims (1)

1. electrical network glaze characteristic area manual intervention sleet test method, this method comprises the steps:

(1), be equipped with one of antiaircraft gun, the wound packages of filling out the silver iodide particulate in the outfit is tried thing, the barrel dliameter size that this wound packages is tried thing is mated with the bore size of join antiaircraft gun bore;

(2), step (1) being equipped with antiaircraft gun is transferred to and treats manual intervention sleet electrical network glaze characteristic area, using this antiaircraft gun that institute is equipped with wound packages is tried thing and is launched to the high-altitude, observe wound packages and tried the test effect that the sleet of thing after by the directive high-altitude is converted into ice pellets, determine the chemical constitution of described ice pellets, find out the composition that wherein has rapid condensation high-altitude water droplet ability, fill out tube with this component substances and constitute the sleet that to condense rapidly and become the wound packages shell of ice pellets from falling in the air;

(3), select a highland as next antiaircraft gun launching site at the above-mentioned manual intervention sleet electrical network glaze characteristic area for the treatment of, the zone that to delimit a diameter at this antiaircraft gun launching site downwind 2km place and this antiaircraft gun launching site downwind 5km place respectively be Ф 1～2km is as influencing pilot region, then, the zone that to delimit a diameter at described antiaircraft gun launching site upwind 1km place be Ф 1～2km is pilot region as a comparison;

(4), in three pilot regions that step (3) delimited, a lead frame is set respectively, on this lead frame, put a lead by east-west direction respectively, put a lead by North and South direction;

(5), 24 hours before on-test, understand the weather forecast of each pilot region that step (3) delimit by local meteorological department, in case know the sleet time of origin, notice participation testing crew gets the jump on sleet described three pilot regions takes place to arrive respectively in preceding 12 hours, arrive and start in the pilot region from participating in testing crew, every 1 hour record once temperature, humidity, wind speed, rainfall, rainfall form, icing density and step (4) the wire icing thickness of putting of this pilot region;

(6), wait for sleet, in case find to fall sleet in the air, antiaircraft gun step of transmitting (1) the wound packages shell of filling out that uses step (2) to transfer immediately;

(7), after 8 hours, to influence temperature, humidity, wind speed, rainfall, rainfall form, icing density and step (4) the wire icing thickness data of putting that pilot region records two that step (3) delimited, with temperature, humidity, wind speed, rainfall, rainfall form, icing density and step (4) the wire icing thickness data of putting that record in a contrast test zone of delimiting in step (3), compare in the importing form;

(8), repeating step (5)～(7) secondary;

(9), the above-mentioned precipitation form of pilot region and the precipitation form in contrast test zone of influencing according to the demonstration of step (7) gained comparing result, if the described precipitation form that influences pilot region is ice pellets, the precipitation form in contrast test zone is sleet, show that then the success of the test of this electrical network glaze characteristic area manual intervention sleet finishes, otherwise show this electrical network glaze characteristic area manual intervention sleet test failure, perhaps, contrast the above-mentioned icing density of pilot region and the icing density in contrast test zone of influencing, if influencing the icing density of pilot region diminishes, the ice covering thickness of the described lead of putting also obviously reduces simultaneously, also show that then the success of the test of this electrical network glaze characteristic area manual intervention sleet finishes, otherwise show this electrical network glaze characteristic area manual intervention sleet test failure.