CN103293409B - Based on lightning arrester DC experiment method and the test platform of voltage compensation - Google Patents
Based on lightning arrester DC experiment method and the test platform of voltage compensation Download PDFInfo
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- CN103293409B CN103293409B CN201310141982.1A CN201310141982A CN103293409B CN 103293409 B CN103293409 B CN 103293409B CN 201310141982 A CN201310141982 A CN 201310141982A CN 103293409 B CN103293409 B CN 103293409B
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Abstract
The invention discloses a kind of lightning arrester DC experiment method based on voltage compensation and test platform, shorten 220kV and above lightning arrester DC experiment time, once can pressurize and can carry out two joint lightning arrester DC experiment by without disconnecting power lead, compare traditional without disconnecting power lead and carry out lightning arrester DC experiment method, in the man-hour of saving 50% or more, improve work efficiency; And development is applicable to lightning arrester direct current has a try the high voltage direct current generator of the adjustable polarity testing platform building, can export the high direct voltage of positive and negative polarity, convenient test, has a good application prospect.
Description
Technical field
The present invention relates to lightning arrester parameter testing technical field, be specifically related to a kind of DC experiment method that without disconnecting power lead based on voltage compensation carries out 220kV and above lightning arrester.
Background technology
The DC experiment of 220kV and above lightning arrester, mainly checks whether the valve block of lightning arrester makes moist, determines whether its performance meets the requirements, as shown in table 1 below, needs to test following items,
For above-mentioned 220kV and above lightning arrester commissioning test project and requirement, traditional without disconnecting power lead carries out the method for lower joint lightning arrester DC experiment, as shown in Figure 1, for the 220kV lightning arrester of two nodal patterns, upper, flange in the middle of lower two joint lightning arresters, negative polarity d. c high pressure is applied by high direct voltage transmitter through microampere meter 1, then after saving the connection of lightning arrester and discharge counter under dismounting, by the end of lower joint lightning arrester through another microampere meter 2 ground connection, directly can calculate through two pieces of microampere meter readings during test, the DC leakage-current of lower two joint lightning arresters, for the 500kV lightning arrester of three joints (or more joint), by certain surveyed two joint lightning arrester two-terminal-grounding, can be equal to the test situation shown in Fig. 1, not in this to go forth.
But there is following shortcoming in the method that traditional without disconnecting power lead carries out lower joint lightning arrester DC experiment:
(1) the DC reference voltage U1mA of upper and lower two joint lightning arresters is often not identical, exert pressure reach any one joint lightning arrester DC reference voltage U1mA after, if the DC leakage-current under 0.75 times of U1mA need be measured, again boost after needing step-down and just can carry out the DC experiment of another joint lightning arrester, affected more complicated, easily makes mistakes in process of the test;
(2) when carrying out lower joint lightning arrester DC experiment, upper and lower two joint lightning arrester parallel connections over the ground, bear identical high direct voltage, when but the DC reference voltage U1mA difference due to upper and lower two joint lightning arresters is larger, when the joint leakage current of an arrester that DC reference voltage is larger reaches 1mA, the DC leakage-current of the joint lightning arrester that U1mA is less sharply increases, two joint lightning arrester total currents are even caused to exceed the rated current of high voltage direct current generator, there is testing failure, thus have to remove lead-in wire segmentation to single-unit test of lightning arrester.
Therefore, traditional without disconnecting power lead carries out the method for lower joint lightning arrester DC experiment, carry out to once pressurize simultaneously two joints or two joint above lightning arrester carry out DC experiment, avoid the problem that the DC current U1mA difference due to each joint lightning arrester causes simultaneously, to respectively connecing lightning arrester, must test after removing lead-in wire.
Summary of the invention
Technical matters solved by the invention overcomes the method that traditional without disconnecting power lead carries out lower joint lightning arrester DC experiment, and affected more complicated, easily makes mistakes in process of the test, must to respectively connecing lightning arrester, the problem tested after removing lead-in wire.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:
Based on a lightning arrester DC experiment method for voltage compensation, it is characterized in that:
Step (a) connects the test platform of lightning arrester DC experiment
Flange in the middle of upper and lower two joint lightning arresters, connects the first microampere meter and applies negative polarity d. c high pressure by negative polarity d. c high pressure transmitter; The end of lower joint lightning arrester is connected the second microampere meter, and the second microampere meter is by an adjustable polarity high voltage direct current generator ground connection;
Step (b) judges the size of the DC reference voltage of upper and lower joint lightning arrester, if the DC reference voltage of upper joint lightning arrester is large, then performs step (c); If the DC reference voltage of lower joint lightning arrester is large, then perform step (d);
Step (c) judges whether the DC current of upper joint lightning arrester reaches 1mA, if reach 1mA, the negative polarity d. c voltage then keeping negative polarity d. c high pressure transmitter to export is constant, regulate adjustable polarity high voltage direct current generator, the high direct voltage of output cathode, increase the voltage at lower joint lightning arrester two ends, the DC current of lower joint lightning arrester is made also to reach 1mA, read and now go up, the DC reference voltage numerical value that lower joint lightning arrester is corresponding, and respectively by negative polarity d. c high pressure transmitter, the output of adjustable polarity high voltage direct current generator reduces to 75%, read and now go up, lower joint lightning arrester Leakage Current,
Step (d) judges whether the DC current of lower joint lightning arrester reaches 1mA, if reach 1mA, then keep maintaining lower joint lightning arrester both end voltage, regulate adjustable polarity high voltage direct current generator, the high direct voltage of output negative pole, compensation saves the voltage at lightning arrester two ends, the DC current of joint lightning arrester is made also to reach 1mA, read the DC reference voltage numerical value that now upper and lower joint lightning arrester is corresponding, and respectively the output of negative polarity d. c high pressure transmitter, adjustable polarity high voltage direct current generator is reduced to 75%, read now upper and lower joint lightning arrester Leakage Current.
The aforesaid lightning arrester DC experiment method based on voltage compensation, it is characterized in that: the described adjustable polarity high voltage direct current generator of step (a) comprises diode D1 ~ D7 and change-over switch, described diode D1 ~ D7 is connected in parallel between change-over switch, when diode D1 ~ D6 place in circuit works, adjustable polarity high voltage direct current generator output cathode high pressure, when diode D2 ~ D7 place in circuit works, adjustable polarity high voltage direct current generator output negative pole high pressure, adjustment change-over switch changes the polarity that adjustable polarity high voltage direct current generator exports high pressure.
The aforesaid lightning arrester DC experiment method based on voltage compensation, is characterized in that: the two ends of the described adjustable polarity high voltage direct current generator of step (a) are also parallel with one for the protection of the discharging gap of adjustable polarity high voltage direct current generator overvoltage.
The aforesaid lightning arrester DC experiment method based on voltage compensation, is characterized in that: step (b) judges that the method for the size of the DC reference voltage of upper and lower joint lightning arrester is,
(b1) electric current I of first, second microampere meter is recorded
1, I
2
(b2) calculating current I
1, I
2between size, if I
2>=I
1-I
2, then descend the DC reference voltage of joint lightning arrester large; Otherwise the DC reference voltage of upper joint lightning arrester is large.
A kind of test platform realizing the lightning arrester DC experiment method of above-mentioned voltage compensation, it is characterized in that: comprise the first microampere meter, negative polarity d. c high pressure transmitter, the second microampere meter and adjustable polarity high voltage direct current generator, described first microampere meter is connected to the flange in the middle of adjacent two joint lightning arresters, and by negative polarity d. c high pressure transmitter ground connection, described second microampere meter connects for the lightning arrester of end connects, and by adjustable polarity high voltage direct current generator ground connection.
The lightning arrester DC experiment test platform of aforesaid voltage compensation, is characterized in that: the two ends of described adjustable polarity high voltage direct current generator are also parallel with one for the protection of the discharging gap of adjustable polarity high voltage direct current generator overvoltage.
The 220kV of aforesaid voltage compensation and above lightning arrester DC experiment test platform, it is characterized in that: described adjustable polarity high voltage direct current generator comprises diode D1 ~ D7 and change-over switch, described diode D1 ~ D7 is connected in parallel between change-over switch, when diode D1 ~ D6 place in circuit works, adjustable polarity high voltage direct current generator output cathode high pressure, when diode D2 ~ D7 place in circuit works, adjustable polarity high voltage direct current generator output negative pole high pressure, adjustment change-over switch changes the polarity that adjustable polarity high voltage direct current generator exports high pressure.
The invention has the beneficial effects as follows: the 220kV of voltage compensation of the present invention and above lightning arrester DC experiment method and test platform, shorten 220kV and above lightning arrester DC experiment time, once pressurization of increasing work efficiency can carry out two joint lightning arrester DC experiment by without disconnecting power lead, compare traditional without disconnecting power lead and carry out lightning arrester DC experiment method, in the man-hour of saving 50% or more, improve work efficiency; And development is applicable to lightning arrester direct current has a try the high voltage direct current generator of the adjustable polarity testing platform building, can export the high direct voltage of positive and negative polarity, convenient test, has a good application prospect.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that traditional without disconnecting power lead of the present invention carries out lightning arrester DC experiment platform.
Fig. 2 is the process flow diagram of lightning arrester DC experiment method of the present invention.
Fig. 3 is the schematic diagram of lightning arrester DC experiment platform of the present invention.
Fig. 4 is the circuit theory diagrams of adjustable polarity high voltage direct current generator of the present invention.
Fig. 5 is the circuit theory diagrams of adjustable polarity high voltage direct current generator output cathode high pressure of the present invention.
Fig. 6 is the circuit theory diagrams of adjustable polarity high voltage direct current generator output negative pole high pressure of the present invention.
Embodiment
Below in conjunction with Figure of description, the present invention is further illustrated.
The 220kV of voltage compensation of the present invention and above lightning arrester DC experiment method and, shorten 220kV and above lightning arrester DC experiment time, once pressurization of increasing work efficiency can carry out two joint lightning arrester DC experiment by without disconnecting power lead, compare traditional without disconnecting power lead and carry out lightning arrester DC experiment method, in the man-hour of saving 50% or more, improve work efficiency, specific implementation process, as shown in Figure 2, comprise the following steps
Step (a) connects the test platform of lightning arrester DC experiment
Flange in the middle of upper and lower two joint lightning arresters, connects the first microampere meter and applies negative polarity d. c high pressure by negative polarity d. c high pressure transmitter; The end of lower joint lightning arrester is connected the second microampere meter, and the second microampere meter is by an adjustable polarity high voltage direct current generator ground connection;
Step (b) judges the size of the DC reference voltage of upper and lower joint lightning arrester, if the DC reference voltage of upper joint lightning arrester is large, then performs step (c); If the DC reference voltage of lower joint lightning arrester is large, then performs step (d), judge that the method for the size of the DC reference voltage of upper and lower joint lightning arrester is here,
(b1) electric current I of first, second microampere meter is recorded
1, I
2
(b2) calculating current I
1, I
2between size, if I
2>=I
1-I
2, then descend the DC reference voltage of joint lightning arrester large; Otherwise the DC reference voltage of upper joint lightning arrester is large;
Step (c) judges whether the DC current of upper joint lightning arrester reaches 1mA, if reach 1mA, the negative polarity d. c voltage then keeping negative polarity d. c high pressure transmitter to export is constant, regulate adjustable polarity high voltage direct current generator, the high direct voltage of output cathode, increase the voltage at lower joint lightning arrester two ends, the DC current of lower joint lightning arrester is made also to reach 1mA, read and now go up, the DC reference voltage numerical value that lower joint lightning arrester is corresponding, and respectively by negative polarity d. c high pressure transmitter, the output of adjustable polarity high voltage direct current generator reduces to 75%, read and now go up, lower joint lightning arrester Leakage Current,
Step (d) judges whether the DC current of lower joint lightning arrester reaches 1mA, if reach 1mA, then keep maintaining lower joint lightning arrester both end voltage, regulate adjustable polarity high voltage direct current generator, the high direct voltage of output negative pole, compensation saves the voltage at lightning arrester two ends, the DC current of joint lightning arrester is made also to reach 1mA, read the DC reference voltage numerical value that now upper and lower joint lightning arrester is corresponding, and respectively the output of negative polarity d. c high pressure transmitter, adjustable polarity high voltage direct current generator is reduced to 75%, read now upper and lower joint lightning arrester Leakage Current.
As shown in Figure 3, realize the 220kV of above-mentioned voltage compensation and the test platform of above lightning arrester DC experiment method, comprise the first microampere meter, negative polarity d. c high pressure transmitter, second microampere meter and adjustable polarity high voltage direct current generator, first microampere meter is connected to the flange in the middle of adjacent two joint lightning arresters, and by negative polarity d. c high pressure transmitter ground connection, second microampere meter connects for the lightning arrester of end connects, and by adjustable polarity high voltage direct current generator ground connection, the two ends of described adjustable polarity high voltage direct current generator are also parallel with one for the protection of the discharging gap of adjustable polarity high voltage direct current generator overvoltage.
As shown in Figure 4, described adjustable polarity high voltage direct current generator comprises diode D1 ~ D7 and change-over switch, and described diode D1 ~ D7 is connected in parallel between change-over switch; As shown in Figure 5, when diode D1 ~ D6 place in circuit works, adjustable polarity high voltage direct current generator output cathode high pressure; As shown in Figure 6, when diode D2-D7 place in circuit works, adjustable polarity high voltage direct current generator output negative pole high pressure, adjustment change-over switch changes the polarity that adjustable polarity high voltage direct current generator exports high pressure.
More than show and describe ultimate principle of the present invention, principal character and advantage.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (2)
1., based on the lightning arrester DC experiment method of voltage compensation, it is characterized in that:
Step (a) connects the test platform of lightning arrester DC experiment
Flange in the middle of upper and lower two joint lightning arresters, connects the first microampere meter, and applies negative polarity d. c high pressure by negative polarity d. c high pressure transmitter; The end of lower joint lightning arrester is connected the second microampere meter, and the second microampere meter is by an adjustable polarity high voltage direct current generator ground connection;
Step (b) judges the size of the DC reference voltage of upper and lower joint lightning arrester, if the DC reference voltage of upper joint lightning arrester is large, then performs step (c); If the DC reference voltage of lower joint lightning arrester is large, then perform step (d);
Step (c) judges whether the DC current of upper joint lightning arrester reaches 1mA, if reach 1mA, the negative polarity d. c voltage then keeping negative polarity d. c high pressure transmitter to export is constant, regulate adjustable polarity high voltage direct current generator, the high direct voltage of output cathode, increase the voltage at lower joint lightning arrester two ends, the DC current of lower joint lightning arrester is made also to reach 1mA, read and now go up, the DC reference voltage numerical value that lower joint lightning arrester is corresponding, and respectively by negative polarity d. c high pressure transmitter, the output of adjustable polarity high voltage direct current generator reduces to 75%, read and now go up, lower joint lightning arrester Leakage Current,
Step (d) judges whether the DC current of lower joint lightning arrester reaches 1mA, if reach 1mA, then keep lower joint lightning arrester both end voltage, regulate adjustable polarity high voltage direct current generator, the high direct voltage of output negative pole, compensation saves the voltage at lightning arrester two ends, the DC current of joint lightning arrester is made also to reach 1mA, read the DC reference voltage numerical value that now upper and lower joint lightning arrester is corresponding, and respectively the output of negative polarity d. c high pressure transmitter, adjustable polarity high voltage direct current generator is reduced to 75%, read now upper and lower joint lightning arrester Leakage Current;
Wherein, the described adjustable polarity high voltage direct current generator of step (a) comprises diode D1 ~ D7 and change-over switch, described diode D1 ~ D7 is connected in parallel between change-over switch, when diode D1 ~ D6 place in circuit works, adjustable polarity high voltage direct current generator output cathode high pressure, when diode D2 ~ D7 place in circuit works, adjustable polarity high voltage direct current generator output negative pole high pressure, adjustment change-over switch changes the polarity that adjustable polarity high voltage direct current generator exports high pressure;
The two ends of the described adjustable polarity high voltage direct current generator of step (a) are also parallel with one for the protection of the discharging gap of adjustable polarity high voltage direct current generator overvoltage;
Step (b) judges that the method for the size of the DC reference voltage of upper and lower joint lightning arrester is,
(b1) electric current I 1, the I2 of first, second microampere meter is recorded;
(b2) size between calculating current I1, I2, if I2 >=I1-I2, then descends the DC reference voltage of joint lightning arrester large; Otherwise the DC reference voltage of upper joint lightning arrester is large.
2. one kind realizes the test platform of the lightning arrester DC experiment method of voltage compensation according to claim 1, it is characterized in that: comprise the first microampere meter, negative polarity d. c high pressure transmitter, the second microampere meter and adjustable polarity high voltage direct current generator, described first microampere meter is connected to the flange in the middle of adjacent two joint lightning arresters, and by negative polarity d. c high pressure transmitter ground connection, described second microampere meter is connected to the end of lightning arrester, and by adjustable polarity high voltage direct current generator ground connection;
The two ends of described adjustable polarity high voltage direct current generator are also parallel with one for the protection of the discharging gap of adjustable polarity high voltage direct current generator overvoltage;
Described adjustable polarity high voltage direct current generator comprises diode D1 ~ D7 and change-over switch, described diode D1 ~ D7 is connected in parallel between change-over switch, when diode D1 ~ D6 place in circuit works, adjustable polarity high voltage direct current generator output cathode high pressure, when diode D2 ~ D7 place in circuit works, adjustable polarity high voltage direct current generator output negative pole high pressure, adjustment change-over switch changes the polarity that adjustable polarity high voltage direct current generator exports high pressure.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103558493A (en) * | 2013-11-02 | 2014-02-05 | 国家电网公司 | Extra-high voltage zinc oxide arrester leakage current measurement device and method |
| CN103630729B (en) * | 2013-11-13 | 2015-12-30 | 国家电网公司 | The primary connection device and method of test 1000kV lightning arrester reference voltage and leakage current |
| CN104167723A (en) * | 2014-08-06 | 2014-11-26 | 齐进 | Main transformer neutral point overvoltage protection device |
| CN107037297A (en) * | 2017-06-15 | 2017-08-11 | 国网辽宁省电力有限公司锦州供电公司 | 220kV arresters exempt to tear the intelligent test method of high-voltage connection open |
| CN107727974B (en) * | 2017-11-09 | 2023-12-29 | 广西电网有限责任公司钦州供电局 | Lightning arrester test device and method based on volt-ampere characteristic deviation |
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Address after: 100761 West Chang'an Avenue, Beijing, No. 86, No. Co-patentee after: JIANGSU ELECTRIC POWER Co. Patentee after: State Grid Corporation of China Co-patentee after: STATE GRID JIANGSU ELECTRIC POWER Co.,Ltd. MAINTENANCE BRANCH Co-patentee after: JIANGSU FANGTIAN POWER TECHNOLOGY Co.,Ltd. Address before: 100761 West Chang'an Avenue, Beijing, No. 86, No. Co-patentee before: JIANGSU ELECTRIC POWER Co. Patentee before: State Grid Corporation of China Co-patentee before: MAINTENANCE DIVISION OF STATE GRID JIANGSU ELECTRIC POWER Co. Co-patentee before: JIANGSU FANGTIAN POWER TECHNOLOGY Co.,Ltd. Address after: 100761 West Chang'an Avenue, Beijing, No. 86, No. Co-patentee after: JIANGSU ELECTRIC POWER Co. Patentee after: State Grid Corporation of China Co-patentee after: MAINTENANCE DIVISION OF STATE GRID JIANGSU ELECTRIC POWER Co. Co-patentee after: JIANGSU FANGTIAN POWER TECHNOLOGY Co.,Ltd. Address before: 100761 West Chang'an Avenue, Beijing, No. 86, No. Co-patentee before: JIANGSU ELECTRIC POWER Co. Patentee before: State Grid Corporation of China Co-patentee before: JIANGSU ELECTRIC POWER COMPANY MAINTENANCE BRANCH Co-patentee before: JIANGSU FANGTIAN POWER TECHNOLOGY Co.,Ltd. |