CN103344843B - A kind of measuring system of series capacitor compensation group - Google Patents
A kind of measuring system of series capacitor compensation group Download PDFInfo
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- CN103344843B CN103344843B CN201310322469.2A CN201310322469A CN103344843B CN 103344843 B CN103344843 B CN 103344843B CN 201310322469 A CN201310322469 A CN 201310322469A CN 103344843 B CN103344843 B CN 103344843B
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Abstract
This application discloses a kind of Fast measurement system, for carrying out Quick Measurement to the Capacitor banks on each brachium pontis of H-shaped electric bridge, comprising: for the single phase alternating current power supply of powering to the two ends of H-shaped electric bridge; For measuring the first reometer of the principal current value of H-shaped electric bridge; For measuring the second reometer of the out-of-balance current value of H-shaped electric bridge; At least one the adjustable condenser group being connected in parallel on the capacitor of Capacitor banks; Be connected with the first reometer, the second reometer, adjustable condenser group respectively, for sending the processor that the electric capacity of control signal to adjustable condenser regulates according to principal current value and out-of-balance current value.Processor regulates the electric capacity of adjustable condenser according to the relation between principal current value and out-of-balance current value, in adjustment process, can measure the deviate of the Capacitor banks on each brachium pontis of H-shaped electric bridge by Quick Measuring according to the Changing Pattern of out-of-balance current value.
Description
Technical field
The application's technical field of power transmission, more particularly, relates to a kind of measuring system of series capacitor compensation group.
Background technology
By connecting series capacitor compensation group in high voltage transmission line, can compensate the impedance of circuit, and then the ability to transmit electricity of circuit can be improved.General each string is mended device and is made up of four Capacitor banks connecting into H-shaped electric bridge, the electric capacity of each Capacitor banks is as far as possible consistent, otherwise damage can be caused to Capacitor banks, therefore when setting up or change series capacitor compensation group, need to carry out balanced adjustment to capacitor, by Capacitor banks each on H-shaped electric bridge electric capacity between difference adjust to specialized range within.Before Capacitor banks is installed to scene, first theoretical trim is carried out to the Capacitor banks of each brachium pontis of H-shaped electric bridge, rated capacitance by each capacitance group is adjusted to unanimously, but when actual field is installed often because the reasons such as the impact of the impact of manufacture deviation, temperature, stray capacitance influences and/or space magnetic field cause the actual capacitance of each brachium pontis and rated capacitance inconsistent, therefore also need to carry out scene adjustment to Capacitor banks before actual installation at the scene.
The out-of-balance current utilizing reometer to measure H-shaped electric bridge at present at the balanced adjustment of erecting stage, when out-of-balance current exceedes setting, the capacitor of Capacitor banks on different brachium pontis is carried out exchanging or increasing capacitor, and then measurement out-of-balance current, if also unbalanced words are just again exchanged Capacitor banks or are increased capacitor, until out-of-balance current value is less than setting, just finally complete balanced adjustment.
This method can not specifically note the deviation on H-shaped electric bridge between certain Capacitor banks and other Capacitor banks, and therefore, need constantly to exchange Capacitor banks, cause the step of trim more loaded down with trivial details, workload is larger.
Summary of the invention
In view of this, the application provides a kind of Fast measurement system can specifically noting the deviation on H-shaped electric bridge between certain Capacitor banks and other Capacitor banks.
To achieve these goals, the existing scheme proposed is as follows:
A kind of Fast measurement system, for measuring the deviation between the Capacitor banks on each brachium pontis of H-shaped electric bridge, comprising:
For the single phase alternating current power supply of powering to the two ends of described H-shaped electric bridge;
For measuring the first reometer of the principal current value of described H-shaped electric bridge;
For measuring the second reometer of the out-of-balance current value of described H-shaped electric bridge;
At least one the adjustable condenser group being connected in parallel on the capacitor of described Capacitor banks;
Be connected with described first reometer, described second reometer, adjustable condenser group respectively, for sending the processor that the electric capacity of control signal to described adjustable condenser regulates according to described principal current value and out-of-balance current value.
Preferably, described adjustable condenser group comprises the capacitor branches of multiple parallel connection;
Each described capacitor branches comprises:
Standard capacitor;
Connect with described standard capacitor, for according to described control signal conducting or the switch cutting off described capacitor branches.
Preferably, described processor is connected by communication with described adjustable condenser group.
Preferably, described processor is wirelessly connected with described second reometer.
Preferably, the voltage of described individual event AC power is 220 volts, and frequency is 45 hertz or 55 hertz.
As can be seen from above-mentioned technical scheme, rapid detection system disclosed in the present application comprises the single phase alternating current power supply for powering to the two ends of described H-shaped electric bridge; For measuring the first reometer of the principal current value of described H-shaped electric bridge; For measuring the second reometer of the out-of-balance current value of described H-shaped electric bridge; At least one the adjustable condenser group being connected in parallel on the capacitor of described Capacitor banks; Be connected with described first reometer, described second reometer, adjustable condenser group respectively, for sending the processor that the electric capacity of control signal to described adjustable condenser regulates according to described principal current value and out-of-balance current value.Processor regulates the electric capacity of adjustable condenser according to the relation between principal current value and out-of-balance current value, in adjustment process, the deviate of the Capacitor banks on each brachium pontis of H-shaped electric bridge can be measured by Quick Measuring according to the Changing Pattern of out-of-balance current value, Capacitor banks can be realized trim fast according to deviate.
In addition, processor in balance regulation system disclosed in the present application is wirelessly connected with adjustable condenser group with the second reometer being used for measuring out-of-balance current respectively, the interference of the stray capacitance formed between connecting line and Capacitor banks can be avoided, improve trim precision.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural drawing of Fig. 1 a kind of balance regulation system of series capacitor compensation group disclosed in the embodiment of the present application;
The wiring diagram of Fig. 2 balance regulation system and Capacitor banks disclosed in the embodiment of the present application.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, be clearly and completely described the technical scheme in the embodiment of the present application, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the application's protection.
The structural drawing of Fig. 1 a kind of balance regulation system of series capacitor compensation group disclosed in the embodiment of the present application.
As shown in Figure 1, disclosed in the present embodiment, balance regulation system comprises: single phase alternating current power supply 20, first reometer 30, second reometer 40 and adjustable condenser group 50, also comprises the processor 10 be connected with tunable capacitor group 50 with the first reometer 30, second reometer 40 respectively.
Before carrying out balanced adjustment to Capacitor banks, with wire, four Capacitor banks are connected into H-shaped electric bridge, so-called H-shaped electric bridge four Capacitor banks is carried out parallel connection between two, is in series by the Capacitor banks after parallel connection.
Individual event AC power 20 is for applying alternating voltage to H-shaped electric bridge, individual event AC power selects variable-frequency power sources, its output voltage is 220 volts, on the impact of Adjustment precision, the frequency of output voltage is adjusted to 45 hertz or 55 hertz in order to avoid power frequency in installation environment.
First reometer 30, for measuring the principal current value of H-shaped electric bridge, namely flows through the value of the electric current of whole H-shaped electric bridge.And be provided with signal output part, signal output part is connected with processor, for by principal current value input processor 10.
Second reometer 40 for measuring the out-of-balance current of H-shaped electric bridge, i.e. current value on the transverse arm of H-shaped electric bridge, and be provided with output terminal, for out-of-balance current value is input to processor 10.In order to avoid the stray capacitance of connecting line formation is on the impact of measuring accuracy, the present embodiment adopts wireless mode to be connected with processor 10 by the second reometer 40.Be specially, arrange wireless communication port 11 on a processor, the second reometer 40 is provided with between corresponding wireless communication port 41, two wireless communication ports and wirelessly transmits data.
Adjustable condenser group 50 can continuously change electric capacity, is made up of the capacitor branches 51 of multiple parallel connection, the K switch a that each capacitive branch 51 comprises a standard capacitor Ca and is in series with standard capacitor; By closed or cut-off switch Ka, the electric capacity of adjustable condenser group 50 can be changed; Adjustable condenser group 50 is also provided with positive-displacement apparatus 52, positive-displacement apparatus 52 is connected with the K switch a on each capacitor branches 51, positive-displacement apparatus 52 is connected with processor 10, processor 10 can command positive-displacement apparatus 52 couples of switch Ka to close/opening operation, to reach the object adjusted the electric capacity of adjustable condenser group by control command.
In order to avoid the stray capacitance of connecting line formation is on the impact of Adjustment precision, the positive-displacement apparatus 52 of adjustable condenser group 50 is wirelessly connected with processor 10, positive-displacement apparatus arranges wireless communication port, processor carries out communication, to adjust the electric capacity of adjustable condenser group 50 by the wireless communication port 11 of self with the wireless communication port on positive-displacement apparatus 51.
When carrying out balanced adjustment, processor 10 receive first reometer 30 export principal current value and the second reometer 40 export out-of-balance current value and calculate, when the ratio of out-of-balance current value and principal current value is within the scope specified, show that the electric capacity of the capacitance group on each brachium pontis of H-shaped electric bridge is balance; If the ratio of out-of-balance current value and principal current value exceedes the scope of regulation, then show that the Capacitor banks on each brachium pontis of H-shaped electric bridge is unbalanced, now need to carry out balanced adjustment.
When carrying out balanced adjustment, the capacitor of adjustable condenser group 50 with Capacitor banks is in parallel, processor 10 controls adjustable condenser group 50 and increases continuously electric capacity from zero, record corresponding out-of-balance current value simultaneously, the electric capacity of change curve to Capacitor banks according to out-of-balance current value judges, if out-of-balance current value increases with the increase of the electric capacity of adjustable condenser group 40, then represent that the Capacitor banks be connected with adjustable condenser group 40 is comparatively bigger than normal than the electric capacity of other Capacitor banks; If along with the continuous increase of the electric capacity of described adjustable condenser group 40, described out-of-balance current value first reduces rear increase, then represent comparatively less than normal compared with the electric capacity of other Capacitor banks with the electric capacity of described adjustable condenser 40 groups of Capacitor banks be connected; Processor 10 shows the value of the electric capacity of the corresponding adjustable condenser 40 in the change flex point place of out-of-balance current value simultaneously, and this value is the Capacitor banks that is connected with adjustable condenser 40 value less than normal.
Operating personnel exchange according to the position of judged result to the Capacitor banks on the brachium pontis of H-shaped electric bridge or increase capacitor on corresponding Capacitor banks.
In order to carry out balanced adjustment to Capacitor banks more fast, can also increase on the basis of native system one group with the adjustable condenser group of processor 10 wireless connections, a capacitor of the Capacitor banks on newly-increased adjustable condenser group and another brachium pontis is in parallel, processor 10 can control two adjustable condenser groups and change electric capacity, and record out-of-balance current value, can judge the Capacitor banks on two brachium pontis so simultaneously.
The wiring diagram of Fig. 2 balance regulation system and Capacitor banks disclosed in the embodiment of the present application.
When utilizing the balance regulation system in this enforcement to adjust Capacitor banks, first connect according to the wiring diagram shown in Fig. 2.
Before balanced adjustment is carried out to Capacitor banks, with wire, four Capacitor banks are connected into H-shaped electric bridge, concrete connected mode is: be connected as the first input end 31 of H-shaped electric bridge using one end of the first Capacitor banks 60 with one end of the second Capacitor banks 70, the other end of the first Capacitor banks 60 one end with the 3rd Capacitor banks 80 is connected, the other end of the second Capacitor banks 70 one end with 90 groups, the 4th capacitor is connected, the other end of the 3rd Capacitor banks 80 is connected with the other end of the 4th Capacitor banks 90 as the second input end 32 of H-shaped electric bridge, the other end of the first Capacitor banks 60 is connected with the second reometer 40 with the other end of the second Capacitor banks 70.
The live wire of single phase alternating current power supply 20 one end with the first reometer 30 is connected, the other end of the first reometer is connected with the first input end 31 of H-shaped electric bridge, second input end 32 of H-shaped electric bridge is connected with the zero line of individual event AC power and ground connection, for measuring out-of-balance current value on the transverse arm that second reometer 40 is connected to H-shaped electric bridge, then adjustable condenser group 50 is connected in parallel on a capacitor C4-1 of Capacitor banks 90.
Start balance regulation system, processor 10 calculates the principal current value received and out-of-balance current value, when out-of-balance current value and principal current value ratio within the limits prescribed time, terminate to adjust; When the ratio of out-of-balance current value and principal current value exceeds the scope of regulation, coprocessor command adjustable condenser group 50 continuously changes electric capacity, record out-of-balance current value simultaneously, then according to the deviate of the Changing Pattern determination Capacitor banks of out-of-balance current value, the position of the Capacitor banks on brachium pontis is carried out exchange or increase capacitor on corresponding Capacitor banks; And then out-of-balance current value measured and calculates, until the ratio of out-of-balance current value and principal current value drops within specialized range, now mean that the electric capacity of the Capacitor banks on each brachium pontis reaches balance, terminate adjustment.
As can be seen from above-mentioned technical scheme, the balance regulation system of series capacitor compensation group disclosed in the present application utilizes processor 10 command adjustable condenser group 40 to continuously change electric capacity and record out-of-balance current value simultaneously, utilize predetermined algorithm to find out rapidly Capacitor banks that on H-shaped electric bridge, electric capacity is less and the larger capacitor of electric capacity, and the capacitor of this corresponding Capacitor banks is carried out exchange or increase capacitor in corresponding Capacitor banks, rapidly Capacitor banks can be adjusted complete, step is simple, and workload is less.
In addition, processor 10 in balance regulation system disclosed in the present application is wirelessly connected with adjustable condenser group 40 with the second reometer 30 being used for measuring out-of-balance current respectively, the interference of the stray capacitance formed between connecting line and Capacitor banks can be avoided, improve trim precision.
Finally, also it should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the application.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from the spirit or scope of the application, can realize in other embodiments.Therefore, the application can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (5)
1. a Fast measurement system, for measuring the deviation between the Capacitor banks on each brachium pontis of H-shaped electric bridge, is characterized in that, comprise:
For the single phase alternating current power supply of powering to the two ends of described H-shaped electric bridge;
For measuring the first reometer of the principal current value of described H-shaped electric bridge;
For measuring the second reometer of the out-of-balance current value of described H-shaped electric bridge;
At least one the adjustable condenser group being connected in parallel on the capacitor of described Capacitor banks;
Be connected with described first reometer, described second reometer, adjustable condenser group respectively, for sending the processor that the electric capacity of control signal to described adjustable condenser regulates according to described principal current value and out-of-balance current value;
Wherein, described processor regulates the electric capacity of described adjustable condenser according to the relation between principal current value and out-of-balance current value, in adjustment process, measure the deviate of the Capacitor banks on each brachium pontis of described H-shaped electric bridge according to the Changing Pattern of described out-of-balance current value, according to described deviate, trim is carried out to described Capacitor banks.
2. Fast measurement system as claimed in claim 1, it is characterized in that, described adjustable condenser group comprises the capacitor branches of multiple parallel connection;
Each described capacitor branches comprises:
Standard capacitor;
Connect with described standard capacitor, for according to described control signal conducting or the switch cutting off described capacitor branches.
3. Fast measurement system as claimed in claim 1 or 2, it is characterized in that, described processor is connected by communication with described adjustable condenser group.
4. balance regulation system as claimed in claim 3, it is characterized in that, described processor is wirelessly connected with described second reometer.
5. the Fast measurement system as described in claim 1,2 or 4, is characterized in that, the voltage of described individual event AC power is 220 volts, and 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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| 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 |
| 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 |
| 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 |
| 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 |
| US11293961B2 (en) * | 2019-03-13 | 2022-04-05 | Aisin Corporation | Capacitance detection device |
| CN110297123B (en) * | 2019-07-23 | 2020-10-16 | 中国南方电网有限责任公司超高压输电公司南宁局 | Unbalanced current test system of series compensation device |
| 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 |
| 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 |
| CN113612240B (en) * | 2021-08-02 | 2023-06-09 | 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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