CN103344843A - Measurement system of series compensation capacitor group - Google Patents
Measurement system of series compensation capacitor group Download PDFInfo
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- CN103344843A CN103344843A CN2013103224692A CN201310322469A CN103344843A CN 103344843 A CN103344843 A CN 103344843A CN 2013103224692 A CN2013103224692 A CN 2013103224692A CN 201310322469 A CN201310322469 A CN 201310322469A CN 103344843 A CN103344843 A CN 103344843A
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Abstract
The invention discloses a fast measurement system, which is used for rapidly measuring a capacitor group on each bridge arm of an H-shaped bridge. The measurement system comprises a single-phase alternating-current power supply, a first ampere meter, a second ampere meter, at least one adjustable capacitor group and a processor, wherein the single-phase alternating-current power supply is used for supplying electricity to two ends of the H-shaped bridge; the first ampere meter is used for measuring a main current value of the H-shaped bridge; the second ampere meter is used for measuring an unbalance current value of the H-shaped bridge; at least one adjustable capacitor group is connected to the capacitors of the capacitor group in parallel; the processor is respectively connected with the first ampere meter, the second ampere meter and the adjustable capacitor group, and is used for emitting a control signal to adjust the electric capacity of the adjustable capacitor according to the main current value and the unbalance current value; and the processor can adjust the electric capacity of the adjustable capacitor group according to the relation between the main current value and the unbalance current value, and can rapidly measure a deviation value of the capacitor group on each bridge arm of the H-shaped bridge in the adjusting process according to the change rule of the unbalance current value.
Description
Technical field
The application's electric power transmission technical field more particularly, relates to a kind of measuring system of series capacitor compensation group.
Background technology
By in high voltage transmission line, connecting the series capacitor compensation group, can the impedance of circuit be compensated, and then can improve the ability to transmit electricity of circuit.General each string is mended device and is made up of four capacitor groups that connect into H shape electric bridge, the electric capacity of each capacitor group is consistent as far as possible, otherwise can cause damage to the capacitor group, therefore when setting up or changing the series capacitor compensation group, need carry out the balance adjustment to capacitor, soon the difference between the electric capacity of each capacitor group is adjusted in the specialized range on the H shape electric bridge.Before the capacitor group is installed to the scene, at first the capacitor group of each brachium pontis of H shape electric bridge is carried out theoretical trim, the rated capacitance that is about to each capacitance group is adjusted to unanimity, but when installing, actual field often because the reasons such as influence of manufacture deviation, temperature effect, stray capacitance influences and/or space magnetic field cause the actual capacitance of each brachium pontis and rated capacitance inconsistent, therefore also needs the capacitor group is carried out the scene adjustment before the actual installation at the scene.
Balance adjustment in the erecting stage at present is to utilize reometer to measure the out-of-balance current of H shape electric bridge, when out-of-balance current surpasses setting, the capacitor of capacitor group on the different brachium pontis exchanged or increase capacitor, and then measurement out-of-balance current, if also unbalanced words are just exchanged the capacitor group again or are increased capacitor, less than setting, just finally finish the balance adjustment up to the out-of-balance current value.
Therefore this method can not be specifically noted, needs the deviation between certain capacitor group and other capacitor groups on the H shape electric bridge constantly exchange the capacitor group, causes the step of trim more loaded down with trivial details, and workload is bigger.
Summary of the invention
In view of this, the application provides a kind of quick measuring system that can specifically note the deviation between certain capacitor group and other capacitor groups on the H shape electric bridge.
To achieve these goals, the existing scheme that proposes is as follows:
A kind of quick measuring system is used for the deviation between the capacitor group on each brachium pontis of H shape electric bridge is measured, and comprising:
Be used for the single phase alternating current power supply to the two ends power supply of described H shape electric bridge;
First reometer that is used for the principal current value of the described H shape electric bridge of measurement;
Second reometer that is used for the out-of-balance current value of the described H shape electric bridge of measurement;
At least one adjustable condenser group that is connected in parallel on the capacitor of described capacitor group;
Be connected with described first reometer, described second reometer, adjustable condenser group respectively, be used for sending the processor that control signal is regulated the electric capacity of described adjustable condenser according to described principal current value and out-of-balance current value.
Preferably, described adjustable condenser group comprises the capacitor branch road of a plurality of parallel connections;
Each described capacitor branch road comprises:
Standard capacitor;
Connect with described standard capacitor, be used for according to described control signal conducting or cut off the switch of described capacitor branch road.
Preferably, described processor is connected by communication with described adjustable condenser group.
Preferably, described processor is connected by wireless mode with described second reometer.
Preferably, the voltage of described individual event AC power is 220 volts, and frequency is 45 hertz or 55 hertz.
From above-mentioned technical scheme as can be seen, the disclosed rapid detection system of the application comprises the single phase alternating current power supply of powering for the two ends to described H shape electric bridge; First reometer that is used for the principal current value of the described H shape electric bridge of measurement; Second reometer that is used for the out-of-balance current value of the described H shape electric bridge of measurement; At least one adjustable condenser group that is connected in parallel on the capacitor of described capacitor group; Be connected with described first reometer, described second reometer, adjustable condenser group respectively, be used for sending the processor that control signal is regulated the electric capacity of described adjustable condenser according to described principal current value and out-of-balance current value.Processor is regulated the electric capacity of adjustable condenser according to the relation between principal current value and the out-of-balance current value, in adjustment process, can measure the deviate of the capacitor group on each brachium pontis of H shape electric bridge according to the Changing Pattern of out-of-balance current value fast, the capacitor group can be realized trim fast according to deviate.
In addition, processor in the disclosed balance regulation system of the application is connected with the adjustable condenser group with second reometer that is used for measuring out-of-balance current respectively by wireless mode, can avoid the interference of the stray capacitance that forms between connecting line and the capacitor group, improve the trim precision.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiment of the application, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural drawing of the balance regulation system of the disclosed a kind of series capacitor compensation group of the embodiment of the present application;
Fig. 2 is the wiring diagram of the disclosed balance regulation system of the embodiment of the present application and capacitor group.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment only is the application's part embodiment, rather than whole embodiment.Based on the embodiment among the application, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the application's protection.
Fig. 1 is the structural drawing of the balance regulation system of the disclosed a kind of series capacitor compensation group of the embodiment of the present application.
As shown in Figure 1, the disclosed balance regulation system of present embodiment comprises: single phase alternating current power supply 20, first reometer 30, second reometer 40 and adjustable condenser group 50 also comprise respectively the processor 10 that is connected with tunable capacitor group 50 with first reometer 30, second reometer 40.
Before the capacitor group being carried out the balance adjustment, with lead four capacitor groups are connected into H shape electric bridge, so-called H shape electric bridge is that four capacitor groups are carried out parallel connection in twos, and the capacitor group after the parallel connection is in series.
Individual event AC power 20 is used for H shape electric bridge is applied alternating voltage, the individual event AC power is selected variable-frequency power sources for use, its output voltage is 220 volts, in order to avoid power frequency in the installation environment to adjusting the influence of precision, the frequency of output voltage is adjusted into 45 hertz or 55 hertz.
The stray capacitance that forms for fear of connecting line is to adjusting the influence of precision, the positive-displacement apparatus 52 of adjustable condenser group 50 and processor 10 are connected by wireless mode, at positive-displacement apparatus wireless communication port is set, processor carries out communication by the wireless communication port on self radio PORT COM 11 and the positive-displacement apparatus 51, so that the electric capacity of adjustable condenser group 50 is adjusted.
When carrying out the balance adjustment, the principal current value of processor 10 receptions first reometer 30 outputs and the out-of-balance current value of second reometer, 40 outputs are also calculated, when the ratio of out-of-balance current value and principal current value is within the scope of regulation, show that the electric capacity of the capacitance group on each brachium pontis of H shape electric bridge is balance; If the ratio of out-of-balance current value and principal current value surpasses the scope of regulation, show that then the capacitor group on each brachium pontis of H shape electric bridge is unbalanced, need carry out the balance adjustment this moment.
When carrying out the balance adjustment, the capacitor of adjustable condenser group 50 with the capacitor group is in parallel, processor 10 control adjustable condenser groups 50 are from the zero electric capacity that increases continuously, record corresponding out-of-balance current value simultaneously, change curve according to the out-of-balance current value is judged the electric capacity of capacitor group, if the out-of-balance current value increases with the increase of the electric capacity of adjustable condenser group 40, represent that then the capacitor group that is connected with adjustable condenser group 40 is comparatively bigger than normal than the electric capacity of other capacitor group; If along with the continuous increase of the electric capacity of described adjustable condenser group 40 and described out-of-balance current value reduces earlier afterwards to increase, represent that then the electric capacity of the capacitor group that is connected with 40 groups of described adjustable condensers is compared comparatively less than normal with the electric capacity of other capacitor groups; Processor 10 shows the value of the electric capacity of the adjustable condenser 40 that the variation flex point place of out-of-balance current value is corresponding simultaneously, and this value is the capacitor group value less than normal that is connected with adjustable condenser 40.
Operating personnel exchange the position of the capacitor group on the brachium pontis of H shape electric bridge according to judged result or increase capacitor in corresponding capacitor group.
In order more fast the capacitor group to be carried out the balance adjustment, can also increase by one group of adjustable condenser group with processor 10 wireless connections on the basis of native system, newly-increased adjustable condenser group and a capacitor of the capacitor group on another brachium pontis are in parallel, processor 10 can be controlled two adjustable condenser groups and change electric capacity, and record out-of-balance current value, can judge the capacitor group on two brachium pontis simultaneously like this.
Fig. 2 is the wiring diagram of the disclosed balance regulation system of the embodiment of the present application and capacitor group.
When utilizing balance regulation system in this enforcement that the capacitor group is adjusted, at first connect according to wiring diagram shown in Figure 2.
Before the capacitor group being carried out the balance adjustment, with lead four capacitor groups are connected into H shape electric bridge, concrete connected mode is: an end of the first capacitor group 60 is connected as the first input end 31 of H shape electric bridge with an end of the second capacitor group 70, the other end of the first capacitor group 60 is connected with an end of the 3rd capacitor group 80, the other end of the second capacitor group 70 is connected with an end of 90 groups in the 4th capacitor, the other end of the 3rd capacitor group 80 is connected with the other end of the 4th capacitor group 90 as second input end 32 of H shape electric bridge, the other end of the first capacitor group 60 is connected with second reometer 40 with the other end of the second capacitor group 70.
The live wire of single phase alternating current power supply 20 is connected with an end of first reometer 30, the other end of first reometer is connected with the first input end 31 of H shape electric bridge, second input end 32 of H shape electric bridge is connected with the zero line of individual event AC power and ground connection, second reometer 40 is connected and is used on the transverse arm of H shape electric bridge measuring the out-of-balance current value, adjustable condenser group 50 is connected in parallel on the capacitor C4-1 of capacitor group 90 again.
Start balance regulation system, principal current value and out-of-balance current value that 10 pairs of processors receive are calculated, and when the ratio of out-of-balance current value and principal current value within the limits prescribed the time, finish adjustment; When the scope of the ratio overshoot of out-of-balance current value and principal current value, coprocessor command adjustable condenser group 50 continuously changes electric capacity, record the out-of-balance current value simultaneously, determine the deviate of capacitor group then according to the Changing Pattern of out-of-balance current value, the position of the capacitor group on the brachium pontis is changed or increased capacitor in corresponding capacitor group; And then the out-of-balance current value measured and calculate, to drop within the specialized range up to the ratio of out-of-balance current value and principal current value, mean that the electric capacity of the capacitor group on each brachium pontis reaches balance this moment, finishes to adjust.
From above-mentioned technical scheme as can be seen, the balance regulation system of the disclosed series capacitor compensation group of the application utilizes processor 10 commander's adjustable condenser groups 40 to continuously change electric capacity and record the out-of-balance current value simultaneously, utilize predetermined algorithm can find out less capacitor group and the bigger capacitor of electric capacity of electric capacity on the H shape electric bridge rapidly, and the capacitor of this corresponding capacitor group exchanged or in corresponding capacitor group, increasing capacitor, can rapidly the adjustment of capacitor group be finished, step is simple, and workload is less.
In addition, processor 10 in the disclosed balance regulation system of the application is connected with adjustable condenser group 40 with second reometer 30 that is used for measuring out-of-balance current respectively by wireless mode, can avoid the interference of the stray capacitance that forms between connecting line and the capacitor group, improve the trim precision.
At last, also need to prove, in this article, relational terms such as first and second grades only is used for an entity or operation are made a distinction with another entity or operation, and not necessarily requires or hint and have the relation of any this reality or in proper order between these entities or the operation.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby make and comprise that process, method, article or the equipment of a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or also be included as the intrinsic key element of this process, method, article or equipment.Do not having under the situation of more restrictions, the key element that is limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
Each embodiment adopts the mode of going forward one by one to describe in this instructions, and what each embodiment stressed is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the application.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and defined General Principle can realize under the situation of the spirit or scope that do not break away from the application in other embodiments herein.Therefore, the application will can not be restricted to these embodiment shown in this article, but will meet the wideest scope consistent with principle disclosed herein and features of novelty.
Claims (5)
1. a quick measuring system is used for the deviation between the capacitor group on each brachium pontis of H shape electric bridge is measured, and it is characterized in that, comprising:
Be used for the single phase alternating current power supply to the two ends power supply of described H shape electric bridge;
First reometer that is used for the principal current value of the described H shape electric bridge of measurement;
Second reometer that is used for the out-of-balance current value of the described H shape electric bridge of measurement;
At least one adjustable condenser group that is connected in parallel on the capacitor of described capacitor group;
Be connected with described first reometer, described second reometer, adjustable condenser group respectively, be used for sending the processor that control signal is regulated the electric capacity of described adjustable condenser according to described principal current value and out-of-balance current value.
2. quick measuring system as claimed in claim 1 is characterized in that, described adjustable condenser group comprises the capacitor branch road of a plurality of parallel connections;
Each described capacitor branch road comprises:
Standard capacitor;
Connect with described standard capacitor, be used for according to described control signal conducting or cut off the switch of described capacitor branch road.
3. quick measuring system as claimed in claim 1 or 2 is characterized in that, described processor is connected by communication with described adjustable condenser group.
4. balance regulation system as claimed in claim 3 is characterized in that, described processor is connected by wireless mode with described second reometer.
5. as claim 1,2 or 4 described quick measuring systems, it is characterized in that the voltage of described individual event AC power is 220 volts, frequency is 45 hertz or 55 hertz.
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| CN201310322469.2A CN103344843B (en) | 2013-07-29 | 2013-07-29 | A kind of measuring system of series capacitor compensation group |
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| CN201310322469.2A CN103344843B (en) | 2013-07-29 | 2013-07-29 | A kind of measuring system of series capacitor compensation group |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103605392A (en) * | 2013-10-28 | 2014-02-26 | 上海思源电力电容器有限公司 | Method for adjusting H-type bridge differential protection initial unbalance degree of capacitor bank |
| CN104576061A (en) * | 2015-01-30 | 2015-04-29 | 日新电机（无锡）有限公司 | Instrument and method for balancing initial unbalanced capacitances of power capacitor devices |
| CN104597341A (en) * | 2015-01-04 | 2015-05-06 | 贵阳供电局 | Method for diagnosing faults inside capacitor in distribution network series compensation |
| CN105652130A (en) * | 2016-03-21 | 2016-06-08 | 成都天进仪器有限公司 | Intelligent power grid portable serial compensation tester |
| CN106597116A (en) * | 2016-11-22 | 2017-04-26 | 国网辽宁省电力有限公司电力科学研究院 | Compensating capacitor capacitance online monitoring device and method |
| CN107017876A (en) * | 2016-01-27 | 2017-08-04 | 苏州普源精电科技有限公司 | Program control capacitive reactances circuit and measurement apparatus |
| CN107144737A (en) * | 2017-06-09 | 2017-09-08 | 华北电力科学研究院有限责任公司 | A kind of series capacitor compensation element fault monitoring method and device |
| CN109375040A (en) * | 2018-12-13 | 2019-02-22 | 国网冀北电力有限公司电力科学研究院 | A kind of state monitoring method, equipment and the system of H bridge capacitor group |
| CN110297123A (en) * | 2019-07-23 | 2019-10-01 | 中国南方电网有限责任公司超高压输电公司南宁局 | Series compensation device out-of-balance current test macro |
| CN111030482A (en) * | 2019-12-10 | 2020-04-17 | 中国南方电网有限责任公司超高压输电公司广州局 | Method for evaluating deterioration state of bridge arm reactor of extra-high voltage flexible-direct current converter station |
| CN111694059A (en) * | 2019-03-13 | 2020-09-22 | 爱信精机株式会社 | Electrostatic capacity detection device |
| CN111983286A (en) * | 2020-08-13 | 2020-11-24 | 中国南方电网有限责任公司超高压输电公司南宁局 | Unbalanced current testing device and system for large-capacity cluster capacitor bank |
| CN113612240A (en) * | 2021-08-02 | 2021-11-05 | 国网湖北省电力有限公司直流运检公司 | Device and method for adjusting unbalanced current of capacitor |
| CN113702714A (en) * | 2021-07-20 | 2021-11-26 | 中国电力科学研究院有限公司 | Method for measuring capacitance value of high-voltage arm of direct-current voltage transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103605392A (en) * | 2013-10-28 | 2014-02-26 | 上海思源电力电容器有限公司 | Method for adjusting H-type bridge differential protection initial unbalance degree of capacitor bank |
| CN104597341A (en) * | 2015-01-04 | 2015-05-06 | 贵阳供电局 | Method for diagnosing faults inside capacitor in distribution network series compensation |
| CN104597341B (en) * | 2015-01-04 | 2017-05-31 | 贵阳供电局 | Capacitor internal method for diagnosing faults in a kind of distribution series compensation |
| CN104576061A (en) * | 2015-01-30 | 2015-04-29 | 日新电机（无锡）有限公司 | Instrument and method for balancing initial unbalanced capacitances of power capacitor devices |
| CN107017876B (en) * | 2016-01-27 | 2023-09-22 | 普源精电科技股份有限公司 | High-frequency program-controlled capacitive impedance circuit and measuring device |
| CN107017876A (en) * | 2016-01-27 | 2017-08-04 | 苏州普源精电科技有限公司 | Program control capacitive reactances circuit and measurement apparatus |
| CN105652130A (en) * | 2016-03-21 | 2016-06-08 | 成都天进仪器有限公司 | Intelligent power grid portable serial compensation tester |
| CN106597116A (en) * | 2016-11-22 | 2017-04-26 | 国网辽宁省电力有限公司电力科学研究院 | Compensating capacitor capacitance online monitoring device and method |
| CN107144737A (en) * | 2017-06-09 | 2017-09-08 | 华北电力科学研究院有限责任公司 | A kind of series capacitor compensation element fault monitoring method and device |
| CN109375040A (en) * | 2018-12-13 | 2019-02-22 | 国网冀北电力有限公司电力科学研究院 | A kind of state monitoring method, equipment and the system of H bridge capacitor group |
| CN109375040B (en) * | 2018-12-13 | 2024-03-19 | 国网冀北电力有限公司电力科学研究院 | State monitoring method, equipment and system for H-bridge capacitor bank |
| CN111694059A (en) * | 2019-03-13 | 2020-09-22 | 爱信精机株式会社 | Electrostatic capacity detection device |
| CN110297123A (en) * | 2019-07-23 | 2019-10-01 | 中国南方电网有限责任公司超高压输电公司南宁局 | Series compensation device out-of-balance current test macro |
| CN111030482A (en) * | 2019-12-10 | 2020-04-17 | 中国南方电网有限责任公司超高压输电公司广州局 | Method for evaluating deterioration state of bridge arm reactor of extra-high voltage flexible-direct current converter station |
| CN111983286A (en) * | 2020-08-13 | 2020-11-24 | 中国南方电网有限责任公司超高压输电公司南宁局 | Unbalanced current testing device and system for large-capacity cluster capacitor bank |
| CN113702714A (en) * | 2021-07-20 | 2021-11-26 | 中国电力科学研究院有限公司 | Method for measuring capacitance value of high-voltage arm of direct-current voltage transformer |
| CN113702714B (en) * | 2021-07-20 | 2023-12-08 | 中国电力科学研究院有限公司 | Method for measuring capacitance value of high-voltage arm of direct-current voltage transformer |
| CN113612240A (en) * | 2021-08-02 | 2021-11-05 | 国网湖北省电力有限公司直流运检公司 | Device and method for adjusting unbalanced current of capacitor |
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