CN202870169U - Anti-high induced voltage interference actual measurement device for power frequency parameters of high voltage transmission line - Google Patents
Anti-high induced voltage interference actual measurement device for power frequency parameters of high voltage transmission line Download PDFInfo
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- CN202870169U CN202870169U CN 201220347544 CN201220347544U CN202870169U CN 202870169 U CN202870169 U CN 202870169U CN 201220347544 CN201220347544 CN 201220347544 CN 201220347544 U CN201220347544 U CN 201220347544U CN 202870169 U CN202870169 U CN 202870169U
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Abstract
Provided is an anti-high induced voltage interference actual measurement device for power frequency parameters of a high voltage transmission line. The device comprises a single-phase power supply, a plurality of tapped transformers and a line parameter tester in sequence, wherein the line parameter tester is externally connected with an upper computer and a synchro source, and the output end of the line parameter tester is connected with a to-be-tested line. The device is simple and practical, can eliminate influences of high induced voltage interference and asymmetry in three phases on the measurement of the line parameters, and improves the measurement precision of the line parameters.
Description
Technical field
The utility model relates to a kind of measurement mechanism of ultra-high-tension power transmission line parameter, especially relates to the actual measurement device that a kind of strong induced voltage disturbs the lower asymmetric power frequency parameter of ultra-high-tension power transmission line three-phase.
Background technology
Transmission line of electricity is the important component part of electric system; its power frequency parameter such as positive order parameter, negative phase-sequence parameter and Zero sequence parameter are to carry out the indispensable parameter that mathematical models of power system is set up in the work such as electric power system tide calculating, transient stability calculating, relay protection setting calculating and power system operation mode formulation before, and its accuracy is directly connected to the safe and stable operation of electrical network.Because be subject to the impact of the factors such as geography, environment, these difficult parameters must regularly be carried out field measurement accurately to calculate by theoretical method.
Fast development along with power grid construction, power transmission line corridor land used growing tension, for saving the transmission of electricity corridor area, double-circuit lines on the same pole, multi circuit transmission lines are increasing, consequent complicated alternating electromagnetic field environment will cause producing between the circuit high induction voltage, high induction current and three-phase line parameter unbalance, further cause between other voltage and current of different orders to produce the problem such as intercouple, actual measurement brings great difficulty to line parameter circuit value for this.Therefore, how to eliminate the interference of high induction voltage and how to solve the subject matter that three-phase line asymmetry parameter measurement problem becomes Measurement accuracy ultra-high-tension power transmission line power frequency parameter.
The ultra-high-tension power transmission line power frequency parameter has multiple measurement mechanism at present, and high induction voltage disturbs these proving installations because being difficult to resolve certainly, and all is supposition three phase line full symmetric, so that the accurate measurement of ultra-high-tension power transmission line power frequency parameter is difficult to guarantee.
The utility model content
Technical problem to be solved in the utility model just provides and a kind ofly can eliminate high induction voltage and the asymmetric impact of triphase parameter in the ultra-high-tension power transmission line power frequency parameter measuring, improves the ultra-high-tension power transmission line power frequency parameter actual measurement device of measuring accuracy.
Solve the problems of the technologies described above, the utility model adopts following technical scheme:
The ultra-high-tension power transmission line power frequency parameter actual measurement device that a kind of anti-high induction voltage disturbs, it is characterized in that: comprise the single phase poaer supply, many tap transformers and the line parameter tester that connect successively, described line parameter tester is also distinguished external host computer and synchro source, the tested transmission line of electricity of its output termination;
Described line parameter tester comprises:
Two power input terminals, two capacitor external terminals, the wherein external single phase alternating current power supply of power input terminal; Capacitor external terminal CSET;
First time three- phase line terminal 01,02,03 and second time three-phase line terminal 04,05,06, respectively external twice tested three-phase lines;
The first and second controlled three-phase ac contactor KM0 and KM13, wherein the first controlled three-phase ac contactor KM0 is as the gauge tap of line parameter tester power input with the switching of device internal circuit, and the second controlled three-phase ac contactor KM13 is as CSET and install the gauge tap that internal circuit opens and closes;
The first to the 12 controlled single phase ac contactor KM1 ~ KM12, wherein first to the 3rd controlled single phase ac contactor KM1 ~ KM3 is one group, is connected on a side of measuring power supply after the one end merges, the other end links to each other with the three-phase of first time three-phase line respectively; The the tenth to the 12 controlled single phase ac contactor KM10 ~ KM12 is one group, is connected on the opposite side of measuring power supply after wherein an end merges, and the other end links to each other with the three-phase on the second loop line road respectively; The the 4th to the 6th controlled single phase ac contactor KM4 ~ KM6 is one group, it is continuous that wherein an end merges the rear power end that is connected with first to the 3rd controlled single phase ac contactor KM1 ~ KM3, and the other end links to each other at the tie point of second time three-phase line with the tenth to the 12 controlled single phase ac contactor KM10 ~ KM12; The the 7th to the 9th controlled single phase ac contactor KM7 ~ KM9 is one group, it is continuous that wherein an end merges the rear power end that is connected with the tenth to the 12 controlled single phase ac contactor KM10 ~ KM12, and the other end links to each other at the tie point of first time three-phase line with first to the 3rd controlled single phase ac contactor KM1 ~ KM3;
One group of single-phase potential transformer VS0 and one group of single-phase current transformer IS0 are used for the voltage and current that power end is measured in measurement, and gather measuring voltage and electric current by data collecting card;
First and second liang of group threephase potential transformer V0 and V1 and first and second liang of group threephase current transformer I0 and I1 measure respectively the voltage and current of first time three-phase line and second time three-phase line, and gather measuring voltage and electric current by data collecting card.
Described controlled single phase ac contactor and controlled three-phase ac contactor are opened and closed by described PC control.
Described many tap transformers are single-phase voltage regulator, described single phase poaer supply can be chosen the 380V single phase alternating current power supply, capacity is not less than 20kVA, described host computer is controlled parameter actual measurement process, record ripple signal to line parameter tester carries out mathematics manipulation, computational analysis and shows the result, and described synchro source is chosen transformer station's high and low pressure bus TV secondary voltage or socket 220V voltage.
Principle:
Take synchro source as reference power supply, as the phase reference of phasor measurement, and the phase angle of induced voltage is approximate constant can guarantee to measure the time at every turn.
A large amount of measured data and theoretical analysises show, in electric system, main induced voltage is line-frequency induction voltage on the ultra-high-tension power transmission line.And at short notice, with respect to synchro source, the inductive disturbance voltage-phase is substantially constant, and amplitude is also approximate constant, can think a constant additional voltage source, thereby can eliminate induced voltage and disturb the impact that line parameter circuit value is measured, and improves the precision of measuring.
Adopt the different modes of connection, can obtain a series of equation of constraint, thereby calculate single time asymmetric transmission line of electricity impedance matrix of three-phase and ground capacitance, with the impedance matrix between any twice and coupling capacitance matrix in the many back transmission lines of tower; Then impedance matrix and capacitance matrix are carried out mathematic(al) manipulation, can obtain simultaneously positive sequence, zero sequence, negative sequence impedance and the capacitance parameter of circuit, and the mutual impedance between each order and electric capacity, be used for Power System Analysis and calculate.
The utility model can also connect the size that taps change single-phase testing power supply and obtains a series of equation of constraint by regulating many tap transformers, equally also can realize the utility model purpose.
Description of drawings
Beneficial effect: this measurement mechanism does not need special power supply, and volume is little, lightweight, easy to carry, simple to operate, can eliminate the asymmetric impact that line parameter circuit value is measured of high induction voltage and three-phase, improves the precision that line parameter circuit value is measured.
The ultra-high-tension power transmission line power frequency parameter actual measurement device electric connecting relation schematic diagram that a kind of anti-high induction voltage of Fig. 1 disturbs;
Fig. 2 surveys composition and the annexation of line parameter tester in the device.
Embodiment
Among the figure: 1-single phase poaer supply, the many tap transformers of 2-, 3-line parameter tester, 4-test line, 5-synchro source, 6-host computer.
As shown in Figure 1, the ultra-high-tension power transmission line power frequency parameter actual measurement device that anti-high induction voltage of the present utility model disturbs, comprise the single phase poaer supply 1, many tap transformers 2 and the line parameter tester 3 that connect successively, line parameter tester 3 is also distinguished external host computer 6 and synchro source 5, the output termination test line of line parameter tester 3.
Referring to Fig. 2, the composition of line parameter tester and annexation are:
Comprise:
Measure power input terminal, two capacitor external terminals for two, wherein the external single-phase AC of power input terminal is measured power supply, and voltage range is got 100V ~ 2000V, and capacity is not less than 20kVA; Capacitor external terminal CSET prevents the superpotential that produces in the measuring process;
First time three- phase line terminal 01,02,03 and second time three-phase line terminal 04,05,06, external connection end is external twice tested three-phase lines respectively;
The first and second controlled three-phase ac contactor KM0 and KM13, wherein the first controlled three-phase ac contactor KM0 is as the gauge tap of power input with the switching of device internal circuit, and the second controlled three-phase ac contactor KM13 is as CSET and install the gauge tap that internal circuit opens and closes;
The first to the 12 controlled single phase ac contactor KM1 ~ KM12, first to the 3rd controlled single phase ac contactor KM1 ~ KM3 is one group, is connected on a side of measuring power supply after wherein an end merges, the other end links to each other with the three-phase of first time three-phase line respectively; The the tenth to the 12 controlled single phase ac contactor KM10 ~ KM12 is one group, is connected on the opposite side of measuring power supply after wherein an end merges, and the other end links to each other with the three-phase on the second loop line road respectively; The the 4th to the 6th controlled single phase ac contactor KM4 ~ KM6 is one group, it is continuous that wherein an end merges the rear power end that is connected with first to the 3rd controlled single phase ac contactor KM1 ~ KM3, and the other end links to each other at the tie point of second time three-phase line with the tenth to the 12 controlled single phase ac contactor KM10 ~ KM12; The the 7th to the 9th controlled single phase ac contactor KM7 ~ KM9 is one group, it is continuous that wherein an end merges the rear power end that is connected with the tenth to the 12 controlled single phase ac contactor KM10 ~ KM12, and the other end links to each other at the tie point of first time three-phase line with first to the 3rd controlled single phase ac contactor KM1 ~ KM3;
One group of single-phase potential transformer VS0 and one group of single-phase current transformer IS0, for the voltage and current of power input, and by data collecting card collection measuring voltage and electric current;
First and second liang of group threephase potential transformer V0 and V1, and first and second liang of group threephase current transformer I0 and I1, measure respectively the voltage and current of first time three-phase line and second time three-phase line, and gather measuring voltage and electric current by data collecting card.
Controlled single phase ac contactor and controlled three-phase ac contactor are opened and closed by described PC control.
Single phase poaer supply 1 can be chosen the 380V single phase alternating current power supply, and capacity is not less than 20kVA.
Many tap transformers 2 are single-phase voltage regulator, and its input end is connected with single phase poaer supply, and output terminal links to each other with the input end of line parameter tester, and output voltage range is 100V ~ 2000V.
Synchro source 5 can be chosen transformer station's high and low pressure bus TV secondary voltage or socket 220V voltage.
6 pairs of parameter actual measurements of host computer process is controlled, and the record ripple signal of line parameter tester is carried out mathematics manipulation, computational analysis and shows the result.
Claims (3)
1. the ultra-high-tension power transmission line power frequency parameter of an anti-high induction voltage interference is surveyed device, it is characterized in that: comprise the single phase poaer supply, many tap transformers and the line parameter tester that connect successively, described line parameter tester is also distinguished external host computer and synchro source, the tested transmission line of electricity of its output termination;
Described line parameter tester comprises:
Two power input terminals, two capacitor external terminals, the wherein external single phase alternating current power supply of power input terminal; Capacitor external terminal CSET;
First time three-phase line terminal (01,02,03) and second time three-phase line terminal (04,05,06), respectively external twice tested three-phase lines;
The first and second controlled three-phase ac contactors (KM0 and KM13), wherein the first controlled three-phase ac contactor (KM0) is as the gauge tap of line parameter tester power input with the switching of device internal circuit, and the second controlled three-phase ac contactor (KM13) is as CSET and install the gauge tap that internal circuit opens and closes;
The first to the 12 controlled single phase ac contactor (KM1 ~ KM12), wherein (KM1 ~ KM3) is one group to the first to the 3rd controlled single phase ac contactor, be connected on a side of measuring power supply after the one end merges, the other end links to each other with the three-phase of first time three-phase line respectively; (KM10 ~ KM12) is one group to the tenth to the 12 controlled single phase ac contactor, is connected on the opposite side of measuring power supply after wherein an end merges, and the other end links to each other with the three-phase on the second loop line road respectively; (KM4 ~ KM6) is one group to the 4th to the 6th controlled single phase ac contactor, (power end of KM1 ~ KM3) be connected was continuous, and (KM10 ~ KM12) tie point at second time three-phase line links to each other the other end with the tenth to the 12 controlled single phase ac contactor with the first to the 3rd controlled single phase ac contactor after wherein an end merged; (KM7 ~ KM9) is one group to the 7th to the 9th controlled single phase ac contactor, (power end of KM10 ~ KM12) be connected was continuous, and (KM1 ~ KM3) tie point at first time three-phase line links to each other the other end with the first to the 3rd controlled single phase ac contactor with the tenth to the 12 controlled single phase ac contactor after wherein an end merged;
One group of single-phase potential transformer (VS0) and one group of single-phase current transformer (IS0) are used for the voltage and current that power end is measured in measurement, and gather measuring voltage and electric current by data collecting card;
First and second liang of group threephase potential transformers (V0 and V1) and first and second liang of group threephase current transformers (I0 and I1), measure respectively the voltage and current of first time three-phase line and second time three-phase line, and gather measuring voltage and electric current by data collecting card.
2. the ultra-high-tension power transmission line power frequency parameter of a kind of anti-high induction voltage interference according to claim 1 is surveyed device, and it is characterized in that: described controlled single phase ac contactor and controlled three-phase ac contactor are opened and closed by described PC control.
3. the ultra-high-tension power transmission line power frequency parameter of anti-high induction voltage interference according to claim 1 and 2 is surveyed device, it is characterized in that: described many tap transformers are single-phase voltage regulator, described single phase poaer supply can be chosen the 380V single phase alternating current power supply, capacity is not less than 20kVA, described host computer can be controlled parameter actual measurement process, record ripple signal to line parameter tester carries out mathematics manipulation, computational analysis and shows the result, and described synchro source is chosen transformer station's high and low pressure bus TV secondary voltage or socket 220V voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220347544 CN202870169U (en) | 2012-07-17 | 2012-07-17 | Anti-high induced voltage interference actual measurement device for power frequency parameters of high voltage transmission line |
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| CN 201220347544 CN202870169U (en) | 2012-07-17 | 2012-07-17 | Anti-high induced voltage interference actual measurement device for power frequency parameters of high voltage transmission line |
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| CN202870169U true CN202870169U (en) | 2013-04-10 |
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| CN 201220347544 Withdrawn - After Issue CN202870169U (en) | 2012-07-17 | 2012-07-17 | Anti-high induced voltage interference actual measurement device for power frequency parameters of high voltage transmission line |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788902A (en) * | 2012-07-17 | 2012-11-21 | 广东电网公司电力科学研究院 | High-voltage transmission line power frequency parameter actual measuring device capable of resisting against high-induced voltage interference |
| CN103760423A (en) * | 2014-01-08 | 2014-04-30 | 国家电网公司 | Method for measuring inter-phase mutual capacitances of long-distance extra-high voltage double-circuit lines on same tower |
-
2012
- 2012-07-17 CN CN 201220347544 patent/CN202870169U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788902A (en) * | 2012-07-17 | 2012-11-21 | 广东电网公司电力科学研究院 | High-voltage transmission line power frequency parameter actual measuring device capable of resisting against high-induced voltage interference |
| CN102788902B (en) * | 2012-07-17 | 2014-08-13 | 广东电网公司电力科学研究院 | High-voltage transmission line power frequency parameter actual measuring device capable of resisting against high-induced voltage interference |
| CN103760423A (en) * | 2014-01-08 | 2014-04-30 | 国家电网公司 | Method for measuring inter-phase mutual capacitances of long-distance extra-high voltage double-circuit lines on same tower |
| CN103760423B (en) * | 2014-01-08 | 2016-03-02 | 国家电网公司 | The alternate mutual capacitance measuring method of a kind of long distance extra-high voltage same tower double circuit line |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20130410 Effective date of abandoning: 20140813 |
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| RGAV | Abandon patent right to avoid regrant |