CN103293409A - Lightning conductor direct current test method and test platform based on voltage compensation - Google Patents
Lightning conductor direct current test method and test platform based on voltage compensation Download PDFInfo
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- CN103293409A CN103293409A CN2013101419821A CN201310141982A CN103293409A CN 103293409 A CN103293409 A CN 103293409A CN 2013101419821 A CN2013101419821 A CN 2013101419821A CN 201310141982 A CN201310141982 A CN 201310141982A CN 103293409 A CN103293409 A CN 103293409A
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Abstract
The invention discloses a lightning conductor direct current test method and test platform based on voltage compensation. Direct current test time of 220 kV and over 220kV lightning conductors is shortened and a direct current test of two sections of the lightning conductors can be conducted through pressure exerting for one time without removal of leads. Compared with a traditional direct current test method without removal of leads, the lightning conductor direct current test method can save 50% or more work hours and improve work efficiency. A direct current high voltage generator with adjustable polarity and suitable for lightning conductor direct current test platform erection is developed, so that positive and negative polar direct current high voltage is output, a test is conducted conveniently, and application prospects are good.
Description
Technical field
The present invention relates to lightning arrester parameter testing technical field, be specifically related to the DC experiment method that a kind of not disconnecting lead based on voltage compensation carries out 220kV and above lightning arrester.
Background technology
The DC experiment of 220kV and above lightning arrester mainly is whether the valve block that checks lightning arrester makes moist, and determines whether its performance meets the requirements, and is as shown in table 1 below, needs the following project of test,
At above-mentioned 220kV and above lightning arrester commissioning test project and requirement, traditional not disconnecting lead descends the method for joint lightning arrester DC experiment, as shown in Figure 1,220kV lightning arrester at two nodal patterns, last, two save the middle flange place of lightning arresters down, apply the negative polarity high direct voltage through microampere meter 1 by the high direct voltage transmitter, then under removing after being connected of joint lightning arrester and discharge counter, the end that saves lightning arrester down through another microampere meter 2 ground connection, can directly be calculated through two microampere meter readings during test, the dc leakage-current of following two joint lightning arresters; For the 500kV lightning arrester of three joints (or more more piece), certain the two joint lightning arrester two-terminal-grounding with surveying can be equal to test situation shown in Figure 1, are not given unnecessary details at this.
But traditional not disconnecting lead descends the method for joint lightning arrester DC experiment to have following shortcoming:
(1) the DC reference voltage U1mA of upper and lower two joint lightning arresters is often inequality, exert pressure and reach after the DC reference voltage U1mA of any joint lightning arrester, if need to measure the dc leakage-current under 0.75 times of U1mA, again boost after the need step-down and just can carry out the DC experiment of another joint lightning arrester, affected more complicated is made mistakes in the process of the test easily;
(2) when descending joint lightning arrester DC experiment, upper and lower two joint lightning arrester parallel connections over the ground, bear identical high direct voltage, but when differing big owing to the upper and lower two DC reference voltage U1mA that save lightning arresters, when the bigger joint leakage current of an arrester of DC reference voltage reaches 1mA, the dc leakage-current of the joint lightning arrester that U1mA is less sharply increases, even cause two joint lightning arrester total currents to exceed the rated current of high voltage direct current generator, the test fault occurs, thereby have to remove the lead-in wire segmentation single-unit lightning arrester is tested.
Therefore, traditional not disconnecting lead descends the method for joint lightning arrester DC experiment, for pressurization is once carried out two joints or the above lightning arrester of two joints carries out DC experiment simultaneously, avoid simultaneously because the problem that the DC current U1mA difference of each joint lightning arrester causes, must remove the lead-in wire back in test to respectively connecing lightning arrester.
Summary of the invention
Technical matters solved by the invention is to overcome the method that traditional not disconnecting lead descends joint lightning arrester DC experiment, and affected more complicated is made mistakes in the process of the test easily, must remove the lead-in wire back in the problem of test to respectively connecing lightning arrester.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of lightning arrester DC experiment method based on voltage compensation is characterized in that:
Step (a) connects the test platform of lightning arrester DC experiment
Flange place in the middle of upper and lower two joint lightning arresters connects first microampere meter and applies the negative polarity high direct voltage by negative polarity high direct voltage transmitter; The end that saves lightning arrester is down connected second microampere meter, and second microampere meter is by an adjustable polarity high voltage direct current generator ground connection;
Step (b) is judged the size of the DC reference voltage of upper and lower joint lightning arrester, and is big as if the DC reference voltage of last joint lightning arrester, then execution in step (c); If the DC reference voltage of following joint lightning arrester is big, then execution in step (d);
Whether the DC current of joint lightning arrester reaches 1mA in step (c) judgement, if reach 1mA, then keep the negative polarity DC voltage of negative polarity high direct voltage transmitter output constant, regulate adjustable polarity high voltage direct current generator, the high direct voltage of output cathode, increase the voltage at joint lightning arrester two ends down, make down the DC current of joint lightning arrester also reach 1mA, read on this moment, the DC reference voltage numerical value of following joint lightning arrester correspondence, and respectively with negative polarity high direct voltage transmitter, the output of adjustable polarity high voltage direct current generator reduces to 75%, reads on this moment, following joint lightning arrester Leakage Current;
Step (d) judges whether the DC current of joint lightning arrester reaches 1mA down, if reach 1mA, then keep keeping down joint lightning arrester both end voltage, regulate adjustable polarity high voltage direct current generator, the high direct voltage of output negative pole, the voltage at joint lightning arrester two ends in the compensation, make the DC current of joint lightning arrester also reach 1mA, read the DC reference voltage numerical value of upper and lower joint lightning arrester correspondence this moment, and respectively the output of negative polarity high direct voltage transmitter, adjustable polarity high voltage direct current generator is reduced to 75%, read upper and lower joint lightning arrester Leakage Current this moment.
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 the change-over switch, when diode D1～D6 place in circuit is worked, adjustable polarity high voltage direct current generator output cathode high pressure, when diode D2～D7 place in circuit is worked, adjustable polarity high voltage direct current generator output negative pole high pressure is adjusted the polarity that change-over switch changes adjustable polarity high voltage direct current generator output high pressure.
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) also are parallel with a discharging gap for the protection of the overvoltage of adjustable polarity high voltage direct current generator.
Aforesaid lightning arrester DC experiment method based on voltage compensation is characterized in that: step (b) judges that the method for size of the DC reference voltage of upper and lower joint lightning arrester is,
(b1) record the electric current I of first, second microampere meter
1, I
2
(b2) calculate electric current I
1, I
2Between size, if I
2〉=I
1-I
2, then descend the DC reference voltage of joint lightning arrester big; Otherwise, on to save the DC reference voltage of lightning arrester big.
A kind of test platform of realizing the lightning arrester DC experiment method of above-mentioned voltage compensation, it is characterized in that: comprise first microampere meter, negative polarity high direct voltage transmitter, second microampere meter and adjustable polarity high voltage direct current generator, described first microampere meter is connected the flange place in the middle of the adjacent two joint lightning arresters, and by negative polarity high direct voltage transmitter ground connection, described second microampere meter is connected to terminal lightning arrester and 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 also are parallel with a discharging gap for the protection of the overvoltage of adjustable polarity high voltage direct current generator.
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 the change-over switch, when diode D1～D6 place in circuit is worked, adjustable polarity high voltage direct current generator output cathode high pressure, when diode D2～D7 place in circuit is worked, adjustable polarity high voltage direct current generator output negative pole high pressure is adjusted the polarity that change-over switch changes adjustable polarity high voltage direct current generator output 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, increase work efficiency once pressurization not disconnecting lead carry out two joint lightning arrester DC experiment, compare traditional not disconnecting lead and carry out lightning arrester DC experiment method, saving 50% or more man-hour, improved work efficiency; And development is applicable to the have a try high voltage direct current generator of the adjustable polarity of testing platform building of lightning arrester direct current, can export the high direct voltage of positive and negative polarity, and convenient test has a good application prospect.
Description of drawings
Fig. 1 is the synoptic diagram that traditional not disconnecting 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 synoptic 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 reach, shorten 220kV and above lightning arrester DC experiment time, increase work efficiency once pressurization not disconnecting lead carry out two joint lightning arrester DC experiment, compare traditional not disconnecting lead and carry out lightning arrester DC experiment method, saving 50% or more man-hour, improved work efficiency, the specific implementation process, as shown in Figure 2, may further comprise the steps
Step (a) connects the test platform of lightning arrester DC experiment
Flange place in the middle of upper and lower two joint lightning arresters connects first microampere meter and applies the negative polarity high direct voltage by negative polarity high direct voltage transmitter; The end that saves lightning arrester is down connected second microampere meter, and second microampere meter is by an adjustable polarity high voltage direct current generator ground connection;
Step (b) is judged the size of the DC reference voltage of upper and lower joint lightning arrester, and is big as if the DC reference voltage of last joint lightning arrester, then execution in step (c); If down the DC reference voltage of joint lightning arrester is big, execution in step (d) then judges that here the method for size of the DC reference voltage of upper and lower joint lightning arrester is,
(b1) record the electric current I of first, second microampere meter
1, I
2
(b2) calculate electric current I
1, I
2Between size, if I
2〉=I
1-I
2, then descend the DC reference voltage of joint lightning arrester big; Otherwise, on to save the DC reference voltage of lightning arrester big;
Whether the DC current of joint lightning arrester reaches 1mA in step (c) judgement, if reach 1mA, then keep the negative polarity DC voltage of negative polarity high direct voltage transmitter output constant, regulate adjustable polarity high voltage direct current generator, the high direct voltage of output cathode, increase the voltage at joint lightning arrester two ends down, make down the DC current of joint lightning arrester also reach 1mA, read on this moment, the DC reference voltage numerical value of following joint lightning arrester correspondence, and respectively with negative polarity high direct voltage transmitter, the output of adjustable polarity high voltage direct current generator reduces to 75%, reads on this moment, following joint lightning arrester Leakage Current;
Step (d) judges whether the DC current of joint lightning arrester reaches 1mA down, if reach 1mA, then keep keeping down joint lightning arrester both end voltage, regulate adjustable polarity high voltage direct current generator, the high direct voltage of output negative pole, the voltage at joint lightning arrester two ends in the compensation, make the DC current of joint lightning arrester also reach 1mA, read the DC reference voltage numerical value of upper and lower joint lightning arrester correspondence this moment, and respectively the output of negative polarity high direct voltage transmitter, adjustable polarity high voltage direct current generator is reduced to 75%, read upper and lower joint lightning arrester Leakage Current this moment.
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 first microampere meter; negative polarity high direct voltage transmitter; second microampere meter and adjustable polarity high voltage direct current generator; first microampere meter is connected the flange place in the middle of the adjacent two joint lightning arresters; and by negative polarity high direct voltage transmitter ground connection; second microampere meter is connected to terminal lightning arrester and connects; and by adjustable polarity high voltage direct current generator ground connection, the two ends of described adjustable polarity high voltage direct current generator also are parallel with a discharging gap for the protection of the overvoltage of adjustable polarity high voltage direct current generator.
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 the change-over switch; As shown in Figure 5, when diode D1～D6 place in circuit is worked, adjustable polarity high voltage direct current generator output cathode high pressure; As shown in Figure 6, when diode D2-D7 place in circuit was worked, adjustable polarity high voltage direct current generator output negative pole high pressure was adjusted the polarity that change-over switch changes adjustable polarity high voltage direct current generator output high pressure.
More than show and described 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; that describes in above-described embodiment and the 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.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (7)
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 place in the middle of upper and lower two joint lightning arresters connects first microampere meter and applies the negative polarity high direct voltage by negative polarity high direct voltage transmitter; The end that saves lightning arrester is down connected second microampere meter, and second microampere meter is by an adjustable polarity high voltage direct current generator ground connection;
Step (b) is judged the size of the DC reference voltage of upper and lower joint lightning arrester, and is big as if the DC reference voltage of last joint lightning arrester, then execution in step (c); If the DC reference voltage of following joint lightning arrester is big, then execution in step (d);
Whether the DC current of joint lightning arrester reaches 1mA in step (c) judgement, if reach 1mA, then keep the negative polarity DC voltage of negative polarity high direct voltage transmitter output constant, regulate adjustable polarity high voltage direct current generator, the high direct voltage of output cathode, increase the voltage at joint lightning arrester two ends down, make down the DC current of joint lightning arrester also reach 1mA, read on this moment, the DC reference voltage numerical value of following joint lightning arrester correspondence, and respectively with negative polarity high direct voltage transmitter, the output of adjustable polarity high voltage direct current generator reduces to 75%, reads on this moment, following joint lightning arrester Leakage Current;
Step (d) judges whether the DC current of joint lightning arrester reaches 1mA down, if reach 1mA, then keep keeping down joint lightning arrester both end voltage, regulate adjustable polarity high voltage direct current generator, the high direct voltage of output negative pole, the voltage at joint lightning arrester two ends in the compensation, make the DC current of joint lightning arrester also reach 1mA, read the DC reference voltage numerical value of upper and lower joint lightning arrester correspondence this moment, and respectively the output of negative polarity high direct voltage transmitter, adjustable polarity high voltage direct current generator is reduced to 75%, read upper and lower joint lightning arrester Leakage Current this moment.
2. the lightning arrester DC experiment method based on voltage compensation according to claim 2, 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 the change-over switch, when diode D1 ~ D6 place in circuit is worked, adjustable polarity high voltage direct current generator output cathode high pressure, when diode D2 ~ D7 place in circuit is worked, adjustable polarity high voltage direct current generator output negative pole high pressure is adjusted the polarity that change-over switch changes adjustable polarity high voltage direct current generator output high pressure.
3. the lightning arrester DC experiment method based on voltage compensation according to claim 2, it is characterized in that: the two ends of the described adjustable polarity high voltage direct current generator of step (a) also are parallel with a discharging gap for the protection of the overvoltage of adjustable polarity high voltage direct current generator.
4. the lightning arrester DC experiment method based on voltage compensation according to claim 2 is characterized in that: step (b) judges that the method for size of the DC reference voltage of upper and lower joint lightning arrester is,
(b1) record the electric current I of first, second microampere meter
1, I
2
(b2) calculate electric current I
1, I
2Between size, if I
2〉=I
1-I
2, then descend the DC reference voltage of joint lightning arrester big; Otherwise, on to save the DC reference voltage of lightning arrester big.
5. test platform of realizing the lightning arrester DC experiment method of the described voltage compensation of claim 1, it is characterized in that: comprise first microampere meter, negative polarity high direct voltage transmitter, second microampere meter and adjustable polarity high voltage direct current generator, described first microampere meter is connected the flange place in the middle of the adjacent two joint lightning arresters, and by negative polarity high direct voltage transmitter ground connection, described second microampere meter is connected to terminal lightning arrester and connects, and by adjustable polarity high voltage direct current generator ground connection.
6. the lightning arrester DC experiment test platform of voltage compensation according to claim 5, it is characterized in that: the two ends of described adjustable polarity high voltage direct current generator also are parallel with a discharging gap for the protection of the overvoltage of adjustable polarity high voltage direct current generator.
7. according to the lightning arrester DC experiment test platform of claim 5 or 6 described voltage compensations, 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 the change-over switch, when diode D1 ~ D6 place in circuit is worked, adjustable polarity high voltage direct current generator output cathode high pressure, when diode D2 ~ D7 place in circuit is worked, adjustable polarity high voltage direct current generator output negative pole high pressure is adjusted the polarity that change-over switch changes adjustable polarity high voltage direct current generator output high pressure.
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Cited By (5)
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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 |
| CN103630729A (en) * | 2013-11-13 | 2014-03-12 | 国家电网公司 | One-step wiring device and method for testing 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 |
| CN107727974A (en) * | 2017-11-09 | 2018-02-23 | 广西电网有限责任公司钦州供电局 | Test of lightning arrester device and method based on C-V characteristic skew |
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Cited By (7)
| 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 |
| CN103630729A (en) * | 2013-11-13 | 2014-03-12 | 国家电网公司 | One-step wiring device and method for testing 1000kV lightning arrester reference voltage and leakage current |
| 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 |
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| 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 |
| CN107727974A (en) * | 2017-11-09 | 2018-02-23 | 广西电网有限责任公司钦州供电局 | Test of lightning arrester device and method based on C-V characteristic skew |
| 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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| CN103293409B (en) | 2016-03-02 |
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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. |
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