CN103091657A - Calibration method of traveling-wave fault location system - Google Patents

The invention belongs to the technical field of traveling-wave fault location calibration and relates to a calibration method of a traveling-wave fault location. The calibration method of the traveling-wave fault location comprises that (1) a group of historical failure data of a to-be-tested circuit is obtained, wherein the historical failure data comprises historical failure distance and historical failure traveling-wave forms at two ends of the to-be-tested circuit corresponding to the historical failure distance, (2) the historical failure traveling-wave forms at the two ends of the to-be-tested circuit are respectively loaded to high speed current signal sources at the two ends of the to-be-tested circuit, (3) according to synchronizing signals of a global positioning system (GPS), the high speed current signal sources transforms the historical failure traveling-wave forms to simulative current signals and respectively inputs to travel-wave fault location devices at the two ends of the to-be-tested circuit, (4) the travel-wave fault location devices are all activated with wave recording functions and calculate a fault location result according to the travel-wave forms collected, and (5) the fault location result is compared with the historical failure distance, the fact that whether the fault location result is within the margin of error or not is judged, and calibration of the travel-wave fault location is completed. The calibration method of the traveling-wave fault location takes the real historical records as a calibration basis, and thus the calibration result is accurate and reliable.

A kind of travelling wave ranging system check method

Technical field

The invention belongs to travelling wave ranging calibration technology field, particularly a kind of travelling wave ranging system check method.

Background technology

Traveling wave ranging device is not subjected to the impact of the factors such as fault type, transition resistance, power system operation mode because of it, the accurate location that can realize line fault, thus extensively be extended in the engineering application.In actual applications, generally take both-end travelling wave ranging method as main.At present, very limited for the detection means of traveling wave ranging device both-end distance measuring performance, a kind of artificial earthing of being tests, this method is generally to carry out before circuit formally puts into operation, the human and material resources that need cost a lot of money and financial resources, the number of times of test is limited, and is repeatable poor; Another kind is to utilize the capable waveform of EMTP emulation to test, and this method lacks the detection to realistic model and simulation waveform accuracy.Simultaneously, theoretical and actual error is inevitable.

Summary of the invention

The present invention has overcome the defective of prior art, and a kind of travelling wave ranging system check method is provided, solved artificial earthing test can not repeatedly repeat, expend fund large, be subject to the impact of circuit service condition and the problem such as EMTP simulation waveform test error is large.

The invention discloses a kind of travelling wave ranging system check method, the method comprises the steps:

Step 1 is obtained one group of historical failure data of circuit to be measured, and these historical failure data comprise historical failure distance and this historical failure apart from the historical failure row waveform at this circuit to be measured two ends of correspondence,

Step 4, the traveling wave ranging device at this circuit to be measured two ends all starts the record wave energy, according to the capable waveform that this traveling wave ranging device collects, calculates the range finding result,

The beneficial effect of a kind of travelling wave ranging system check method disclosed by the invention is: the one,, automaticity is high, and checkout procedure need not manpower intervention, has saved a large amount of human and material resources and financial resources; The 2nd,, real historical failure data make the result of verification more accurate, have solved simulation waveform and have lacked the problem that practice is supported; The 3rd,, the verification waveform database provides reliable basis for verification and the analysis of travelling wave ranging system.

Description of drawings

Fig. 1 is a kind of travelling wave ranging system check of the present invention method schematic flow diagram.

Embodiment

A kind of travelling wave ranging system check method of the present invention is described in detail as follows in conjunction with the accompanying drawings and embodiments.

The invention discloses a kind of travelling wave ranging system check method, the method is carried out verification based on row ripple both-end distance measuring principle to the travelling wave ranging system, referring to Fig. 1, comprises the steps:

Step 1 is obtained one group of historical failure data of circuit to be measured, these historical failure data comprise historical failure distance and this historical failure apart from correspondence should circuit to be measured two ends (M end and N hold) historical failure row waveform,

Step 4, the traveling wave ranging device of M end and N end all starts the record wave energy, gathers respectively the analog current signal of holding separately the output of high speed electric current signal source, output row waveform is according to the capable waveform of M end and the output of N end, based on both-end travelling wave ranging principle, calculate the range finding result

Because waveform format is a lot, when historical failure row waveform belongs to special or during privately owned form, after the format conversion of historical failure row waveform can being become electrical power system transient waveform standard format-Comtrade form, reloads to high speed current signal source.And for the convenience of verification and analysis, the historical failure row waveform that is converted to the Comtrade form can be stored, form the verification waveform database, as the foundation of travelling wave ranging system check and analysis.

Above embodiment only is used for explanation the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.