CN103245842B - 10 ~ 35kV new clothes electric device total system dry run detection method - Google Patents
10 ~ 35kV new clothes electric device total system dry run detection method Download PDFInfo
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Abstract
The invention discloses a kind of 10 ~ 35kV new clothes electric device total system dry run detection method, 1) the method utilizes equipment and common instrument on the spot, simple and feasible; 2) this detection method is when carrying out before putting equipment in service, avoids existing problems in transmission process and causes repetitive operation, power failure, processing time; 3) this detection method from Timeliness coverage problem source, can provide reliable basis for dealing with problems, and can judge all second loop return wiring correctness safely, reliably, easily; 4) this detection method energy Timeliness coverage, correcting apparatus self Problems existing and first and second equipment installment quality are as the problem that the human factor such as wiring, phase sequence causes, and guarantee the disposable successful power transmission of electrical equipment.
Description
Technical field
The present invention relates to a kind of voltage detection method, the voltage detection method of particularly a kind of 10 ~ 35kV new clothes electric device total system dry run.
Background technology
In new Electrical equipment installation engineering power transmission in the past; due to workmen in work progress, there is misconnection, miss, virtual connection phenomenon causes equipment electric power feeding time to incur loss through delay; or there is the hidden danger making band direction relay protection positive dirction tripping or malfunction in the other direction because of PT inverted sequence problem; even cause the unsafe factors such as electrical equipment damage; and install in the course of receiving new; inspector is difficult to Timeliness coverage and gets rid of, and delays valuable electric power feeding time, the quality of engineering is had a greatly reduced quality.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art part, and provide a kind of leaving over 10 ~ 35kV electrical installation project to there is ND potential problem and equipment deficiency, to the self-inspection that the installation quality of electrical equipment is accomplished more comprehensively, more thoroughly, truly, guarantee 10 ~ 35kV new clothes electric device total system dry run detection method of the disposable successful power transmission 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 all at closing position, by 10kV ~ 35kV bus PT on position.Remove 10kV ~ 35kV station and use low pressure side outlet, by station variation plate placement 1 one 2 grades i.e. ceiling voltage shelves in succession, become as pressure build-up test transformer with 10kV ~ 35kV station, test front megohmmeter and measure 10kV ~ 35kV primary circuit and voltage secondary circuit is alternate and insulation resistance over the ground all meets the requirements, test connection and relevant test job can be carried out:
(2) experiment power supply is taken at external 380V three-phase and four-line AC power, three-phase supply introduces air switch mains side, three-phase voltage pressure regulator end of incoming cables is led to by air switch load-side, Electrical Parameter Meter input end is led to again by three-phase regulator leading-out terminal, 10kV ~ 35kV station low pressure side is led to through Electrical Parameter Meter output terminal, through station with becoming high voltage load switch on 10kV ~ 35kV bus, zero phase and three-phase voltage pressure regulator zero phase of experiment power supply, Electrical Parameter Meter N end connects, the mutually direct ground connection of 10kV ~ 35kV station change zero, and after wiring is correctly checked in work on the spot responsible official inspection, can pressurize, site test personnel should be informed before pressurization, boost operations people is boosted after order under should obtaining work responsible official, can slowly boost, boosting overall process should be exhaled and be sung magnitude of voltage, note observing electrical equipment and instrument simultaneously, whether instrument reading situation of change is normal, should step-down immediately open test power switch if note abnormalities, ascertain the reason and can stepping up from zero be carried out after processing, detected primary system is made to reach positive sequence load voltage value,
(3) opening upper end at PT bis-skies uses multimeter to measure each phase voltage value and should be: primary voltage/PT no-load voltage ratio.The correctness of checking PT no-load voltage ratio, phase-sequence meter is used to measure the correctness of PT secondary voltage phase sequence measurement positive sequence, or use phase meter to measure PT secondary voltage a phase and b phase, b phase and c phase, angle between c phase with a phase, the corresponding advanced b phase 120 degree of measurement result a, the corresponding advanced c phase 120 degree of b, the corresponding advanced a phase 120 degree of c, the correctness of checking secondary connection and phase sequence;
(4) verify that opening upper end at PT bis-skies after PT no-load voltage ratio and phase sequence are correctly measures each phase voltage value U1 and make a record, each phase voltage value U2 is measured at each line segregation metered voltage gauge outfit wiring place, protection or measuring voltage terminal connections place, calculate U1-U2 value, whether the pressure drop of inspection secondary circuit voltage meets standard;
(5) read as requested, record each parameter, voltage should be down to zero by off-test immediately, open test power switch.Recover station low pressure side outlet, all devices is returned to original state, by test instrument, instrument, instrument playback, site clearing.
10 ~ 35kV new clothes electric device total system dry run detection method of the present invention utilizes 10 ~ 35kV station in station to become, three-phase regulator, Electrical Parameter Meter incoming transport 380 volts of power supplys are passed through as experiment power supply input end in its low-pressure side, by adjustment three-phase regulator output voltage, stepping up from zero is become to station and reaches rating operating voltage to bus and bus PT primary system, under dry run state, detect the phase sequence of PT no-load voltage ratio and first and second electrical equipment tie lines, polarity and secondary voltage pressure drop, instrument reading etc. and whether meet technical requirement.
In sum, the present invention's following advantage compared to existing technology:
1) the method utilizes equipment and common instrument on the spot, simple and feasible; 2) this detection method is when carrying out before putting equipment in service, avoids existing problems in transmission process and causes repetitive operation, power failure, processing time; 3) this detection method from Timeliness coverage problem source, can provide reliable basis for dealing with problems, and can judge all second loop return wiring correctness safely, reliably, easily; 4) this detection method energy Timeliness coverage, correcting apparatus self Problems existing and first and second equipment installment quality are as the problem that the human factor such as wiring, phase sequence causes, and guarantee the disposable successful power transmission of electrical equipment.
Accompanying drawing explanation
Fig. 1 is test connection figure of the present invention.
Fig. 2 is voltage secondary circuit wiring diagram of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in more detail.
Embodiment 1
10 ~ 35kV new clothes electric device total system dry run detection method as shown in Figure 1-2, the steps include: to disconnect main transformer 10kV(35kV) side switch and all feeder switches all remain on closing position, by 10kV(35kV) bus PT is on position.Remove 10kV(35kV) stand and use low pressure side outlet, by station variation plate placement ceiling voltage shelves (1 one 2 short circuit) in succession.With 10kV(35kV) stand with becoming as pressure build-up test transformer, test front megohmmeter and measure 10kV(35kV) primary circuit and voltage secondary circuit is alternate and insulation resistance over the ground all meets the requirements, test connection and relevant test job can be carried out:
1) testing crew is tested tie lines figure according to Fig. 1 and is carried out wiring, and through work responsible official check check confirm errorless after, can pressurize, site test (relay protection) personnel should be informed before pressurization, boost operations people is boosted after order under should obtaining work responsible official, can slowly boost, boosting overall process should be exhaled at any time and be sung magnitude of voltage, note observing electrical equipment and instrument simultaneously, whether instrument reading situation of change is normal, should step-down immediately open test power switch if note abnormalities, ascertain the reason and can stepping up from zero be carried out after processing, detected primary system is made to reach positive sequence load voltage value.
2) tester is according to Fig. 2 voltage circuit wiring diagram, opens upper end and uses multimeter to measure each phase voltage value and should be: primary voltage/PT no-load voltage ratio at PT bis-skies.The correctness of checking PT no-load voltage ratio.Use phase-sequence meter to measure the correctness of PT secondary voltage phase sequence measurement positive sequence, or use phase meter to measure PT secondary voltage a phase and b phase, b phase and c phase, angle between c phase with a phase, the corresponding advanced b phase 120 degree of measurement result a, the corresponding advanced c phase 120 degree of b, the corresponding advanced a phase 120 degree of c.The correctness of checking secondary connection and phase sequence.
3) verify that opening upper end at PT bis-skies after PT no-load voltage ratio and phase sequence are correctly measures each phase voltage value U1 and make a record; each phase voltage value U2 is measured at each line segregation metered voltage gauge outfit wiring place, protection or measuring voltage terminal connections place; calculate U1-U2 value, whether the pressure drop of inspection secondary circuit voltage meets standard (voltage drop is no more than 3% of rated voltage).
4) read as requested, record each parameter, voltage should be down to zero by off-test immediately, open test power switch.Recover station low pressure side outlet, all devices is returned to original state, by test instrument, instrument, instrument playback (or entrucking), site clearing.
It is same as the prior art that the present embodiment does not state part.
Claims (1)
1. 10 ~ 35kV new clothes electric device total system dry run detection method, the steps include:
(1) main transformer 10kV ~ 35kV side switch is disconnected, feeder switch is all at closing position, by 10kV ~ 35kV bus PT on position, remove 10kV ~ 35kV station and use low pressure side outlet, by station variation plate placement 1 one 2 grades i.e. ceiling voltage shelves in succession, become as pressure build-up test transformer with 10kV ~ 35kV station, test front megohmmeter and measure 10kV ~ 35kV primary circuit and voltage secondary circuit is alternate and insulation resistance over the ground all meets the requirements, test connection and relevant test job can be carried out:
(2) experiment power supply is taken at external 380V three-phase and four-line AC power, three-phase and four-line AC power introduces air switch mains side, three-phase voltage pressure regulator end of incoming cables is led to by air switch load-side, Electrical Parameter Meter input end is led to again by three-phase voltage pressure regulator leading-out terminal, 10kV ~ 35kV station low pressure side is led to through Electrical Parameter Meter output terminal, through station with becoming high voltage load switch on 10kV ~ 35kV bus, zero phase and three-phase voltage pressure regulator zero phase of experiment power supply, Electrical Parameter Meter N end connects, the mutually direct ground connection of 10kV ~ 35kV station change zero, and after wiring is correctly checked in work on the spot responsible official inspection, can pressurize, site test personnel should be informed before pressurization, boost operations people is boosted after order under should obtaining work responsible official, can slowly boost, boosting overall process should be exhaled and be sung magnitude of voltage, note observing electrical equipment and instrument simultaneously, whether instrument reading situation of change is normal, should step-down immediately open test power switch if note abnormalities, ascertain the reason and can stepping up from zero be carried out after processing, detected primary system is made to reach positive sequence load voltage value,
(3) opening upper end at PT bis-skies uses multimeter to measure each phase voltage value and should be: primary voltage/PT no-load voltage ratio, the correctness of checking PT no-load voltage ratio, phase-sequence meter is used to measure the correctness of PT secondary voltage phase sequence measurement positive sequence, phase meter is used to measure PT secondary voltage a phase and b phase respectively, b phase and c phase, angle between c phase with a phase, the corresponding advanced b phase 120 degree of measurement result a, the corresponding advanced c phase 120 degree of b, the corresponding advanced a phase 120 degree of c, the correctness of checking secondary connection and phase sequence;
(4) verify that opening upper end at PT bis-skies after PT no-load voltage ratio and phase sequence are correctly measures each phase voltage value U1 and make a record, each phase voltage value U2 is measured at each line segregation metered voltage gauge outfit wiring place, protection or measuring voltage terminal connections place, calculate U1-U2 value, whether the pressure drop of inspection secondary circuit voltage meets standard;
(5) read as requested, record each parameter, voltage should be down to zero by off-test immediately, open test power switch, recovers station low pressure side outlet, all devices is returned to original state, by 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 |
| CN108459230B (en) * | 2018-03-09 | 2020-11-24 | 重庆兴汉电力科技股份有限公司 | Fault detection method for electrical high-voltage equipment |
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