A kind of line phase-sequence detection checking method
Technical field
The present invention relates to the power line construction technical field, relate in particular to a kind of line phase-sequence detection checking method.
Background technology
Transmission of electricity is after boosting with the electric energy that transformer sends generator, realizes through the opertaing devices such as isolating switch access transmission line of electricity again.Need Check Phase Sequence behind newly-built 10-220KV circuit, transformation line construction, if the consequence that the line phase-sequence detection wrong will occur has: reactive power compensator has very strict requirement to input A, B, C phase sequence.If the phase sequence wrong, the perhaps phase place homophase of the phase place of current sampling and voltage sampling, it is inaccurate all can to cause power factor to detect, and the situation that can not automatically drop into can occur, and the phenomenon of over-compensation also can occur; If another circuit by distribution interval access paired running is not having under the prerequisite of nuclear phase, the phase sequence mistake, access can cause phase fault, causes accident to occur, so circuit puts into operation to transformer station, and nuclear phase work is very important.
Summary of the invention
The invention provides a kind of can increasing work efficiency, alleviate the on-the-spot labour intensity of personnel, guarantee the line phase-sequence detection checking method of electric power netting safe running.
Realize that the technical scheme that above-mentioned purpose is taked is: a kind of line phase-sequence detection checking method, by the known phase sequence in circuit both sides, utilize the instruments such as insulation resistance meter, ground wire, measure the method for every phase insulating resistance value, the correctness of check line construction wiring, newly-built or reconstruction circuit A phase nuclear phase the steps include: as example with the N side take the M side
A) M side, N side B, C are used respectively ground wire short circuit and ground connection (shown in the figure one) mutually, use the 5000V insulation resistance meter to measure A phase insulation resistance in the M side, if reading is regime values (not being 0), illustrate the M side with the N side newly-built or reconstruction circuit A mutually between wiring correct;
B) if a) step 5000V insulation resistance meter reading is 0, in the N side A, C are used respectively ground wire short circuit and ground connection (shown in the figure two) mutually, use the 5000V insulation resistance meter to measure A phase insulation resistance in the M side, if reading is regime values (not being 0), illustrate that M side A phase or reconstruction circuit B newly-built with the N side is connected, wiring makes a mistake, and a side joint line must be readjusted;
C) if b) step 5000V insulation resistance meter reading is 0, in the N side A, B are used respectively ground wire short circuit and ground connection (shown in the figure three) mutually, use the 5000V insulation resistance meter to measure A phase insulation resistance in the M side, if reading is regime values (not being 0), illustrate that M side A phase or reconstruction circuit C newly-built with the N side is connected, wiring makes a mistake, and a side joint line must be readjusted;
Pass through a) b) c) three steps get rid of the accuracy that can determine that M side, N side A are connected one by one, by that analogy, can check this circuit B phase, C phase phase sequence, in time judge the correctness of circuit wiring.
The inventive method is simple, practical, be easy to the operating personnel and grasp use, whether can judge fast circuit wiring phase sequence correct, in time find because of phase sequence wrong problem and rectify and improve in the construction stage, can avoid the charged rear discovery circuit wiring phase sequence mistake that puts into operation of circuit, the appearance of the rectification situation of doing over again again, and then increase work efficiency, alleviate the on-the-spot labour intensity of personnel, improve power supply reliability, guarantee the safe operation of electrical network.
Description of drawings
The present invention is described further below in conjunction with accompanying drawing:
Fig. 1 is the synoptic diagram of step a) of the present invention;
Fig. 2 is the synoptic diagram of step b) of the present invention;
Fig. 3 is the synoptic diagram of step c) of the present invention.
Embodiment
As shown in Figure 1, a kind of line phase-sequence detection checking method is by the known phase sequence in circuit both sides, utilize the instruments such as insulation resistance meter, ground wire, measure the method for every phase insulating resistance value, the correctness of check line construction wiring, newly-built or reconstruction circuit A phase nuclear phase the steps include: as example with the N side take the M side
A) M side, N side B, C are used respectively ground wire short circuit and ground connection (shown in the figure one) mutually, use the 5000V insulation resistance meter to measure A phase insulation resistance in the M side, if reading is regime values (not being 0), illustrate the M side with the N side newly-built or reconstruction circuit A mutually between wiring correct;
B) if a) step 5000V insulation resistance meter reading is 0, in the N side A, C are used respectively ground wire short circuit and ground connection (shown in the figure two) mutually, use the 5000V insulation resistance meter to measure A phase insulation resistance in the M side, if reading is regime values (not being 0), illustrate that M side A phase or reconstruction circuit B newly-built with the N side is connected, wiring makes a mistake, and a side joint line must be readjusted;
C) if b) step 5000V insulation resistance meter reading is 0, in the N side A, B are used respectively ground wire short circuit and ground connection (shown in the figure three) mutually, use the 5000V insulation resistance meter to measure A phase insulation resistance in the M side, if reading is regime values (not being 0), illustrate that M side A phase or reconstruction circuit C newly-built with the N side is connected, wiring makes a mistake, and a side joint line must be readjusted;
Pass through a) b) c) three steps get rid of the accuracy that can determine that M side, N side A are connected one by one, by that analogy, can check this circuit B phase, C phase phase sequence, in time judge the correctness of circuit wiring.
The inventive method is simple, practical, be easy to the operating personnel and grasp use, whether can judge fast circuit wiring phase sequence correct, in time find because of phase sequence wrong problem and rectify and improve in the construction stage, can avoid the charged rear discovery circuit wiring phase sequence mistake that puts into operation of circuit, the appearance of the rectification situation of doing over again again, and then increase work efficiency, alleviate the on-the-spot labour intensity of personnel, improve power supply reliability, guarantee the safe operation of electrical network.