CN103245842A - Detection method for full-system simulation running of 10-35 kV newly-mounted electrical device - Google Patents
Detection method for full-system simulation running of 10-35 kV newly-mounted electrical device Download PDFInfo
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- CN103245842A CN103245842A CN2013101352709A CN201310135270A CN103245842A CN 103245842 A CN103245842 A CN 103245842A CN 2013101352709 A CN2013101352709 A CN 2013101352709A CN 201310135270 A CN201310135270 A CN 201310135270A CN 103245842 A CN103245842 A CN 103245842A
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Abstract
The invention discloses a detection method for full-system simulation running of 10 kV-35 kV newly-mounted electrical device. The detection method has the advantages as follows: 1), the method utilizes in situ equipment and common instruments, and is simple, convenient practicable; 2), the detection method is performed before equipment is put into operation, so that repeated operation, power failure and processing time caused by problems in a power transmission process are avoided; 3), the detection method can find the problems from a source timely, provides reliable reference for solving the problems, and can judge whether all secondary loop wirings are correct or not safely, reliably, simply and conveniently; and 4), the detection method can timely find and correct problems associated with the equipment and primary and secondary equipment mounting quality problems caused by human factors such as wiring, phase sequence and the like, and ensures one-pass successful power transmission of the electric equipment.
Description
Technical field
The present invention relates to a kind of voltage detection method, particularly the voltage detection method of a kind of 10～35kV new clothes electric device total system dry run.
Background technology
Send in the electricity in new electrical equipment installation work in the past; because there is misconnection in the workmen, misses in work progress, the virtual connection phenomenon causes the equipment electric power feeding time to incur loss through delay; or there is the hidden danger make band direction relay protection positive dirction tripping or malfunction in the other direction because of PT inverted sequence problem; even cause unsafe factor such as electrical equipment damage; and install in the course of receiving new; the inspector is difficult in time find to get rid of, and has incured loss through delay valuable electric power feeding time, and the quality of engineering is had a greatly reduced quality.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art part, and provide a kind of 10～35kV electrical installation project is left over to have ND potential problem and equipment deficiency, to the installation quality of electrical equipment accomplish more comprehensively, more thoroughly, truly self check, guarantee the disposable 10～35kV new clothes electric device total system dry run detection method of successfully sending electricity of electrical equipment.
A kind of 10～35kV new clothes electric device total system dry run detection method the steps include:
(1) disconnect main transformer 10kV～35kV side switch, feeder switch is all at closing position, with 10kV～35kV bus PT on position.Remove 10kV～35kV station with becoming low-voltage side outlet, to stand with variation in succession plate to place 1 one 2 grades be the ceiling voltage shelves, use and become as the pressure build-up test transformer with 10kV～35kV station, measure 10kV～35kV primary circuit and voltage secondary circuit insulation resistance alternate and over the ground with megohmmeter before the test and all meet the requirements, can carry out test connection and relevant test job:
(2) experiment power supply is taken at external 380V three-phase and four-line AC power, three-phase supply is introduced the air switch mains side, lead to three-phase voltage pressure regulator end of incoming cables by the air switch load-side, lead to the Electrical Parameter Meter input end by the three-phase regulator leading-out terminal again, lead to 10kV～35kV station with becoming low-pressure side through the Electrical Parameter Meter output terminal, press on-load switch through the station to 10kV～35kV bus with uprising, zero and three-phase voltage pressure regulator zero phase of experiment power supply, Electrical Parameter Meter N end connects, 10kV～35kV station is with becoming zero direct ground connection mutually, and after wiring is correctly checked in work on the spot responsible official inspection, can pressurize, should inform the site test personnel before the pressurization, boost operations people should obtain boosting under the work responsible official after the order, can slowly boost, the overall process of boosting should be exhaled and be sung magnitude of voltage, note observing electrical equipment and instrument simultaneously, whether table meter indication situation of change is normal, if note abnormalities step-down immediately and open test power switch, ascertain the reason and handle after can carry out zero and rise and boost, make detected primary system reach the positive sequence load voltage value;
(3) opening upper end at PT secondary sky uses multimeter to measure each phase voltage value to should be: primary voltage/PT no-load voltage ratio.The correctness of checking PT no-load voltage ratio, use phase-sequence meter to measure the correctness that PT secondary voltage phase sequence is measured positive sequence, or use phase meter to measure PT secondary voltage a and b phase, b and c phase, c and a mutually between angle, the corresponding leading b of measurement result a is 120 degree mutually, the corresponding leading c of b is 120 degree mutually, the corresponding leading a of c is 120 degree mutually, the correctness of checking secondary connection and phase sequence;
(4) the correct back of checking PT no-load voltage ratio and phase sequence is opened upper end each phase voltage value U1 of measurement and is carried out record at PT secondary sky, measure each phase voltage value U2 at each line segregation metered voltage gauge outfit wiring place, protection or measuring voltage terminal connections place, calculate the U1-U2 value, whether check secondary circuit voltage drop meets standard;
(5) read, record each parameter as requested, off-test should be down to voltage zero immediately, the open test power switch.Recover the station with becoming low-voltage side outlet, all devices is returned to original state, with test instrument, instrument, instrument playback, site clearing.
10～35kV station is with becoming in 10～35kV new clothes electric device total system dry run detection method utilization of the present invention station, pass through three-phase regulator, 380 volts of power supplys of Electrical Parameter Meter incoming transport as the experiment power supply input end in its low-pressure side, by adjusting the three-phase regulator output voltage, the station is boosted to bus and bus PT primary system reaches rating operating voltage with becoming zero, under the dry run state, whether phase sequence, polarity and the secondary voltage pressure drop of detection PT no-load voltage ratio and first and second electrical equipment tie lines, table meter indication etc. meets technical requirement.
In sum, the present invention's following advantage compared to existing technology:
1) this method is utilized equipment and common instrument on the spot, and is simple and feasible; 2) this detection method is when carrying out before equipment puts into operation, and has avoided existing problems in the transmission process and causes repetitive operation, power failure, processing time; 3) this detection method can in time be pinpointed the problems from the source, and reliable basis is provided for dealing with problems, can be safely, reliably, easily all secondary circuit wiring correctness are judged; 4) problem that this detection method can in time be found, correcting apparatus self exists and first and second equipment installment quality be as the problem that human factors such as wiring, phase sequence cause, and guarantees that electrical equipment is disposable successfully to send.
Description of drawings
Fig. 1 is test connection figure of the present invention.
Fig. 2 is voltage secondary circuit wiring diagram of the present invention.
Embodiment
Be described in more detail below in conjunction with the present invention of embodiment.
Embodiment 1
A kind of 10～35kV new clothes electric device total system dry run detection method shown in Fig. 1-2 the steps include: to disconnect main transformer 10kV(35kV) side switch and all feeder switches all remain on closing position, with 10kV(35kV) bus PT is on position.Remove 10kV(35kV) stand with becoming low-voltage side outlet, will stand with variation plate placement ceiling voltage shelves (1 one 2 short circuit) in succession.Use 10kV(35kV) stand with becoming as the pressure build-up test transformer, measure 10kV(35kV with megohmmeter before the test) primary circuit and the voltage secondary circuit is alternate and insulation resistance over the ground all meets the requirements, the test job that can carry out test connection and be correlated with:
1) testing crew is tested tie lines figure according to Fig. 1 and is carried out wiring, and through the work responsible official check check confirm errorless after, can pressurize, should inform site test (guarantor continues) personnel before the pressurization, boost operations people should obtain boosting under the work responsible official after the order, can slowly boost, the overall process of boosting should be exhaled at any time and be sung magnitude of voltage, note observing electrical equipment and instrument simultaneously, whether table meter indication situation of change is normal, if note abnormalities step-down immediately and open test power switch, ascertain the reason and handle after can carry out zero and rise and boost, make detected primary system reach the positive sequence load voltage value.
2) tester is according to Fig. 2 voltage circuit wiring diagram, opens upper end at PT secondary sky and uses multimeter to measure each phase voltage value to should be: primary voltage/PT no-load voltage ratio.The correctness of checking PT no-load voltage ratio.Use phase-sequence meter to measure the correctness that PT secondary voltage phase sequence is measured positive sequence, or use phase meter to measure PT secondary voltage a and b phase, b and c phase, c and a mutually between angle, the corresponding leading b of measurement result a is 120 degree mutually, and the corresponding leading c of b is 120 degree mutually, and the corresponding leading a of c is 120 degree mutually.The correctness of checking secondary connection and phase sequence.
3) the correct back of checking PT no-load voltage ratio and phase sequence is opened upper end each phase voltage value U1 of measurement and is carried out record at PT secondary sky; measure each phase voltage value U2 at each line segregation metered voltage gauge outfit wiring place, protection or measuring voltage terminal connections place; calculate U1-U2 value, check the secondary circuit voltage drop whether to meet standard (voltage drop be no more than rated voltage 3%).
4) read, record each parameter as requested, off-test should be down to voltage zero immediately, the open test power switch.Recover the station with becoming low-voltage side outlet, all devices is returned to original state, with test instrument, instrument, instrument playback (or entrucking), site clearing.
It is same as the prior art that present embodiment is not stated part.
Claims (1)
1. 10～35kV new clothes electric device total system dry run detection method the steps include:
(1) disconnects main transformer 10kV～35kV side switch, feeder switch is all at closing position, with 10kV～35kV bus PT on position, remove 10kV～35kV station with becoming low-voltage side outlet, to stand with variation in succession plate to place 1 one 2 grades be the ceiling voltage shelves, use and become as the pressure build-up test transformer with 10kV～35kV station, measure 10kV～35kV primary circuit and voltage secondary circuit insulation resistance alternate and over the ground with megohmmeter before the test and all meet the requirements, can carry out test connection and relevant test job:
(2) experiment power supply is taken at external 380V three-phase and four-line AC power, three-phase supply is introduced the air switch mains side, lead to three-phase voltage pressure regulator end of incoming cables by the air switch load-side, lead to the Electrical Parameter Meter input end by the three-phase regulator leading-out terminal again, lead to 10kV～35kV station with becoming low-pressure side through the Electrical Parameter Meter output terminal, press on-load switch through the station to 10kV～35kV bus with uprising, zero and three-phase voltage pressure regulator zero phase of experiment power supply, Electrical Parameter Meter N end connects, 10kV～35kV station is with becoming zero direct ground connection mutually, and after wiring is correctly checked in work on the spot responsible official inspection, can pressurize, should inform the site test personnel before the pressurization, boost operations people should obtain boosting under the work responsible official after the order, can slowly boost, the overall process of boosting should be exhaled and be sung magnitude of voltage, note observing electrical equipment and instrument simultaneously, whether table meter indication situation of change is normal, if note abnormalities step-down immediately and open test power switch, ascertain the reason and handle after can carry out zero and rise and boost, make detected primary system reach the positive sequence load voltage value;
(3) opening upper end at PT secondary sky uses multimeter to measure each phase voltage value to should be: primary voltage/PT no-load voltage ratio, the correctness of checking PT no-load voltage ratio, use phase-sequence meter to measure the correctness that PT secondary voltage phase sequence is measured positive sequence, use phase meter to measure PT secondary voltage a and b phase respectively, b and c phase, angle between c and a phase, the corresponding leading b of measurement result a is 120 degree mutually, the corresponding leading c of b is 120 degree mutually, and the corresponding leading a of c is 120 degree mutually, the correctness of checking secondary connection and phase sequence;
(4) the correct back of checking PT no-load voltage ratio and phase sequence is opened upper end each phase voltage value U1 of measurement and is carried out record at PT secondary sky, measure each phase voltage value U2 at each line segregation metered voltage gauge outfit wiring place, protection or measuring voltage terminal connections place, calculate the U1-U2 value, whether check secondary circuit voltage drop meets standard;
(5) read, record each parameter as requested, off-test should be down to voltage zero immediately, and the open test power switch recovers the station with becoming low-voltage side outlet, and all devices is returned to original state, with test instrument, instrument, instrument playback, site clearing.
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| CN105974226A (en) * | 2016-04-29 | 2016-09-28 | 国网河南省电力公司南阳供电公司 | Portable power device test power source device and detection method thereof |
| CN108459230A (en) * | 2018-03-09 | 2018-08-28 | 重庆兴汉电力科技股份有限公司 | Electric high-voltage equipment fault detection method |
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