CN104793027A - Multi-range adjustable equivalent load for experiments - Google Patents
Multi-range adjustable equivalent load for experiments Download PDFInfo
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- CN104793027A CN104793027A CN201510204387.7A CN201510204387A CN104793027A CN 104793027 A CN104793027 A CN 104793027A CN 201510204387 A CN201510204387 A CN 201510204387A CN 104793027 A CN104793027 A CN 104793027A
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Abstract
The invention discloses a multi-range adjustable equivalent load for experiments. The multi-range adjustable equivalent load comprises a movable air cushion base. Three columns Rdc and a column Rs, Cs and Lr are arranged on the surface of the movable air cushion base. Direct-current resistors in series connection are arranged in each column Rdc. An equivalent resistor, an equivalent capacitor and an equivalent inductor in series connection are arranged in the column Rs, Cs and Lr. The direct-current resistors, the equivalent resistor, the equivalent capacitor and the equivalent inductor can be in short circuit through short circuit rods. A shielding cover is arranged at the tops of the three columns Rdc and the top of the column Rs, Cs and Lr. The multi-range adjustable equivalent load has the advantages that equivalence is achieved by selecting reasonable resistor, capacitor and inductor combinations according to different electrical characteristics showed by a direct-current converter valve under different electric strength, and accordingly, a correct partial pressure relationship with a sample valve is formed.
Description
Technical field
The invention belongs to experiment appliance field, be specifically related to a kind of test and multiregion can regulate equivalent load.
Background technology
For ± 660kV, ± 800kV, ± 1100kV extra-high voltage direct-current transmission engineering thyristor valves Insulation Test, especially MVU Insulation Test, if the quadruple valve enforcement test that suspention is traditionally complete, because trial voltage is high, the features such as test loop size is large, no matter be lifting work or experiment work, it is all very large that it implements difficulty.Therefore a kind of equivalent load device need be invented, by a part for alternative multiplex valve test product in multiplex valve insulation type test process, the proposition of its parameters is all equivalent with the parameters of corresponding thyristor valves.And due in test loop, the impact of relevant resistance, stray capacitance, voltage measuring apparatus can not be a determined value with the parameter of converter valve equivalence, therefore equivalent load needs multiregion to regulate.
Summary of the invention
Technical matters to be solved by this invention is for above-mentioned the deficiencies in the prior art, there is provided a kind of test multiregion can regulate equivalent load, for under different electrical strength, the different electrical specifications that DC converter valve is externally shown are chosen rational resistance, electric capacity and inductor combination and are reached equivalence, thus form correct dividing potential drop relation with test product valve.
The technical solution adopted in the present invention is: a kind of test multiregion can regulate equivalent load, comprise air-cushion moving formula base, described air-cushion moving formula base upper surface is provided with three Rdc posts and Rs, Cs, Lr post, the direct current resistance of series connection is respectively equipped with in described three Rdc posts, the equivalent resistance of series connection, equivalent capacity and equivalent inductance is provided with in described Rs, Cs, Lr post, described direct current resistance, equivalent resistance, equivalent capacity and equivalent inductance are all by short circuit bar short circuit, and described three Rdc posts and Rs, Cs, Lr column top are provided with radome.
As preferably, described three Rdc posts and Rs, Cs, Lr post include be connected successively from top to bottom first segment, second section, Section three, Section four, Section five, Section six, Section seven, Section eight and Section nine.
As preferably, the direct current resistance resistance value in each joint of described three Rdc posts is consistent respectively.
As preferably, the first segment of described Rdc post is divided into three sections, 0.3M Ω direct current resistance is disposed with from top to bottom in described three sections, 0.6M Ω direct current resistance and 1.2M Ω direct current resistance, described second section is divided into two sections, 2.1M Ω direct current resistance and 2.1M Ω direct current resistance is disposed with from top to bottom in described two sections, described Section three is divided into two sections, 4.2M Ω direct current resistance and 2.1M Ω direct current resistance is disposed with from top to bottom in two sections, 8.4M Ω direct current resistance is provided with in described Section four, 10.5M Ω direct current resistance is provided with in described Section five, 10.5M Ω direct current resistance is provided with in described Section six, 12.6M Ω direct current resistance is provided with in described Section seven, 12.6M Ω direct current resistance is provided with in described Section eight, 12.6M direct current resistance is provided with in described Section nine.
As preferably, described Rs, Cs, the first segment of Lr post is six sections, is disposed with 0.2mH equivalent inductance from top to bottom in described six sections, 0.4mH equivalent inductance, 1.2mH equivalent inductance, 1.8mH equivalent inductance, 2.4mH equivalent inductance and 6mH equivalent inductance, described second section is five sections, is disposed with 525nF equivalent capacity from top to bottom in five sections, 128 Ω equivalent resistances, 0.22mH equivalent inductance, 0.42mH equivalent inductance, 262.5nF equivalent capacity, 256 Ω equivalent resistances, 0.6mH equivalent inductance, 175nF equivalent capacity, 384 Ω equivalent resistances, 0.6mH equivalent inductance, 175nF equivalent capacity and 384 Ω equivalent resistances, be provided with 1.8mH equivalent inductance in described Section three, 58.333nF equivalent capacity and 1152 Ω equivalent resistances, be provided with 2.4mH equivalent inductance in described Section four, 43.75nF equivalent capacity and 1536 Ω equivalent resistances, be provided with 3mH equivalent inductance in described Section five, 35nF equivalent capacity and 1920 Ω equivalent resistances, be provided with 3mH equivalent inductance in described Section six, 35nF equivalent capacity and 1920 Ω equivalent resistances, be provided with 7.2mH equivalent inductance in described Section seven, 29.167nF equivalent capacity and 2304 Ω equivalent resistances, be provided with 7.2mH equivalent inductance in described Section eight, 29.167nF equivalent capacity and 2304 Ω equivalent resistances, be provided with 7.2mH equivalent inductance in described Section nine, 29.167nF equivalent capacity and 2304 Ω equivalent resistances.
As preferably, between described three Rdc posts and Section four and Section five of Rs, Cs, Lr post, between Section seven and Section eight, be all connected with grading ring by metal link rod.
As preferably, as preferably, described three Rdc posts are connected by metal link rod with the position that Rs, Cs, Lr post is provided with grading ring.
Beneficial effect of the present invention is:
(1), during most high ambient temperature 40 DEG C, the temperature rise of hot spot of equivalent load under each rating test parameter is no more than 45k.
(2) equivalent load device over the ground distributed capacitance be not more than 300pF;
(3) each section of equivalent resistance, equivalent capacity, direct current resistance parameter and ratings deviation be not more than ± 3%, each section of equivalent inductance parameter and ratings deviation be not more than ± 5%;
(4) entirety of equivalent load is tower-type multi-layer structure, adopts the nature type of cooling; Adopt air-cushion moving mode, can general safety steadily movement;
(5) equivalent load device is used direct current resistance, equivalent resistance, equivalent capacity and equivalent inductance can facilitate short circuit and adjustment, and not because short circuit and adjustment affect local discharge test requirement.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is K direction view in Fig. 1;
Fig. 3 is that the present invention Section three is to the 9th economize on electricity gas connection diagram;
Fig. 4 is first segment of the present invention and the continuous figure of second section electrical connection schematic diagram.
In figure: 1, air-cushion moving formula base; 2, Rdc post; 3, Rs, Cs, Lr post; 4, radome; 5, grading ring; 6, metal link rod.
Embodiment
Below in conjunction with the accompanying drawings and the specific embodiments the present invention is described in further detail.
As shown in Fig. 1-Fig. 4, a kind of test is with multiregion regulating equivalent load, comprise air-cushion moving formula base 1, described air-cushion moving formula base 1 upper surface is provided with three Rdc posts 2 and Rs, Cs, Lr post 3, the direct current resistance of series connection is respectively equipped with in described three Rdc posts 2, the equivalent resistance of series connection, equivalent capacity and equivalent inductance is provided with in described Rs, Cs, Lr post 3, described direct current resistance, equivalent resistance, equivalent capacity and equivalent inductance are all by short circuit bar short circuit, and described three Rdc posts 2 and Rs, Cs, Lr post 3 top are provided with radome 4.
In the present embodiment, described three Rdc posts 2 and Rs, Cs, Lr post 3 include be connected successively from top to bottom first segment, second section, Section three, Section four, Section five, Section six, Section seven, Section eight and Section nine.
In the present embodiment, the direct current resistance resistance value in each joint of described three Rdc posts 2 is consistent respectively.
In the present embodiment, the first segment of described Rdc post 2 is divided into three sections, 0.3M Ω direct current resistance is disposed with from top to bottom in described three sections, 0.6M Ω direct current resistance and 1.2M Ω direct current resistance, described second section is divided into two sections, 2.1M Ω direct current resistance and 2.1M Ω direct current resistance is disposed with from top to bottom in described two sections, described Section three is divided into two sections, 4.2M Ω direct current resistance and 2.1M Ω direct current resistance is disposed with from top to bottom in two sections, 8.4M Ω direct current resistance is provided with in described Section four, 10.5M Ω direct current resistance is provided with in described Section five, 10.5M Ω direct current resistance is provided with in described Section six, 12.6M Ω direct current resistance is provided with in described Section seven, 12.6M Ω direct current resistance is provided with in described Section eight, 12.6M direct current resistance is provided with in described Section nine.
In the present embodiment, described Rs, Cs, the first segment of Lr post 3 is six sections, is disposed with 0.2mH equivalent inductance from top to bottom in described six sections, 0.4mH equivalent inductance, 1.2mH equivalent inductance, 1.8mH equivalent inductance, 2.4mH equivalent inductance and 6mH equivalent inductance, described second section is five sections, is disposed with 525nF equivalent capacity from top to bottom in five sections, 128 Ω equivalent resistances, 0.22mH equivalent inductance, 0.42mH equivalent inductance, 262.5nF equivalent capacity, 256 Ω equivalent resistances, 0.6mH equivalent inductance, 175nF equivalent capacity, 384 Ω equivalent resistances, 0.6mH equivalent inductance, 175nF equivalent capacity and 384 Ω equivalent resistances, be provided with 1.8mH equivalent inductance in described Section three, 58.333nF equivalent capacity and 1152 Ω equivalent resistances, be provided with 2.4mH equivalent inductance in described Section four, 43.75nF equivalent capacity and 1536 Ω equivalent resistances, be provided with 3mH equivalent inductance in described Section five, 35nF equivalent capacity and 1920 Ω equivalent resistances, be provided with 3mH equivalent inductance in described Section six, 35nF equivalent capacity and 1920 Ω equivalent resistances, be provided with 7.2mH equivalent inductance in described Section seven, 29.167nF equivalent capacity and 2304 Ω equivalent resistances, be provided with 7.2mH equivalent inductance in described Section eight, 29.167nF equivalent capacity and 2304 Ω equivalent resistances, be provided with 7.2mH equivalent inductance in described Section nine, 29.167nF equivalent capacity and 2304 Ω equivalent resistances.
In the present embodiment, between described three Rdc posts 2 and Section four and Section five of Rs, Cs, Lr post 3, between Section seven and Section eight, be all connected with grading ring 5 by metal link rod 6.
In the present embodiment, as preferably, the position that described three Rdc posts 2 and Rs, Cs, Lr post 3 are provided with grading ring 5 is connected by metal link rod 6.
In the present embodiment, equivalent load mainly comprises following electronic devices and components:
Rs: damping circuit equivalent resistance;
Cs: damping circuit equivalent capacity;
Lr: the equivalent inductance in loop;
Rdc: equivalent d.c. resistance;
The building form that equivalent load Rs, Cs, Lr part adopt multiple unit to be connected in series.According to " RDZTR038000-0036, synthesis loop valve electrical design ", " RDZTR038000-0028, valve group damping circuit designs ", with Cs=2.1/12=175nF; Rs=32 Ω × 12=384 Ω; Lr=1.2mH is Reference Equivalent unit, and unit is level.
Rdc also adopts multiple unit to be connected in series building form, and Rs, Cs, Lr divide out, and realize independent regulation.
Equivalent negative is loaded with following 8 kinds of modes
(table 1) equivalent load building form:
In the inferior effect load of each mode, the range of adjustment of Rs, Cs, Lr partially bears 15% ~ polarization 35%, maximumly during mode 8 uses 28 grades of Reference Equivalent unit, and this equivalent load is made up of 38 grades of Reference Equivalent unit.
The range of adjustment 1 ~ 211% of the Rdc of equivalent load mode 1 ~ 7, is 26.58M Ω to the maximum, and the range of adjustment of the Rdc of equivalent load mode 8 is 1 ~ 150%, is 26.4M Ω to the maximum.
Rated withstand voltage under 8 kinds of equivalent load modes of table 1 requires as table 2:
The rated withstand voltage of table 2 equivalent load
Equivalent load is after DC voltage withstand test, under the partial discharge test of regulation, positive polarity 3h, stop 2h, negative polarity 3h, all in the end complete Partial Discharge Data in 1h and measure, office puts value and is no more than 280pC, allow higher amplitude but the low individual pulse of repetition frequency, during the record of in the end 1h, office puts value and should meet:
Office puts value and is greater than the pulse of 300pC/maximum 3 per minute;
Office puts value and is greater than the pulse of 500pC/maximum 2 per minute;
Office puts value and is greater than the pulse of 1000pC/maximum 1 per minute.
Every data under 8 kinds of equivalent load modes of table 1 are as table 3:
The every data of table 3 equivalent load building form
In the present embodiment, carry out short circuit by short circuit pole pair electronic devices and components, the electronic devices and components after short circuit are temporarily in idle state, make to be left with this, and workable electronic devices and components reach equivalence.The various electronic devices and components provided in the present embodiment all can short circuit and adjustment arbitrarily, can reach the requirement of DC converter valve insulation experiment.
Claims (7)
1. a test is with multiregion regulating equivalent load, it is characterized in that: comprise air-cushion moving formula base (1), described air-cushion moving formula base (1) upper surface is provided with three Rdc posts (2) and a Rs, Cs, Lr post (3), the direct current resistance of series connection is respectively equipped with in described three Rdc posts (2), described Rs, Cs, the equivalent resistance of series connection is provided with in Lr post (3), equivalent capacity and equivalent inductance, described direct current resistance, equivalent resistance, equivalent capacity and equivalent inductance are all by short circuit bar short circuit, described three Rdc posts (2) and a Rs, Cs, Lr post (3) top is provided with radome (4).
2. a kind of test energy multiregion adjustment equivalent load according to claim 1, is characterized in that: described three Rdc posts (2) and Rs, Cs, Lr post (3) include be connected successively from top to bottom first segment, second section, Section three, Section four, Section five, Section six, Section seven, Section eight and Section nine.
3. a kind of test according to claim 1 and 2 multiregion can regulate equivalent load, it is characterized in that: the direct current resistance resistance value in each joint of described three Rdc posts (2) is consistent respectively.
4. a kind of test according to claim 2 multiregion can regulate equivalent load, it is characterized in that: the first segment of described Rdc post (2) is divided into three sections, 0.3M Ω direct current resistance is disposed with from top to bottom in described three sections, 0.6M Ω direct current resistance and 1.2M Ω direct current resistance, described second section is divided into two sections, 2.1M Ω direct current resistance and 2.1M Ω direct current resistance is disposed with from top to bottom in described two sections, described Section three is divided into two sections, 4.2M Ω direct current resistance and 2.1M Ω direct current resistance is disposed with from top to bottom in two sections, 8.4M Ω direct current resistance is provided with in described Section four, 10.5M Ω direct current resistance is provided with in described Section five, 10.5M Ω direct current resistance is provided with in described Section six, 12.6M Ω direct current resistance is provided with in described Section seven, 12.6M Ω direct current resistance is provided with in described Section eight, 12.6M direct current resistance is provided with in described Section nine.
5. a kind of test according to claim 2 multiregion can regulate equivalent load, it is characterized in that: described Rs, Cs, the first segment of Lr post (3) is six sections, is disposed with 0.2mH equivalent inductance from top to bottom in described six sections, 0.4mH equivalent inductance, 1.2mH equivalent inductance, 1.8mH equivalent inductance, 2.4mH equivalent inductance and 6mH equivalent inductance, described second section is five sections, is disposed with 525nF equivalent capacity from top to bottom in five sections, 128 Ω equivalent resistances, 0.22mH equivalent inductance, 0.42mH equivalent inductance, 262.5nF equivalent capacity, 256 Ω equivalent resistances, 0.6mH equivalent inductance, 175nF equivalent capacity, 384 Ω equivalent resistances, 0.6mH equivalent inductance, 175nF equivalent capacity and 384 Ω equivalent resistances, be provided with 1.8mH equivalent inductance in described Section three, 58.333nF equivalent capacity and 1152 Ω equivalent resistances, be provided with 2.4mH equivalent inductance in described Section four, 43.75nF equivalent capacity and 1536 Ω equivalent resistances, be provided with 3mH equivalent inductance in described Section five, 35nF equivalent capacity and 1920 Ω equivalent resistances, be provided with 3mH equivalent inductance in described Section six, 35nF equivalent capacity and 1920 Ω equivalent resistances, be provided with 7.2mH equivalent inductance in described Section seven, 29.167nF equivalent capacity and 2304 Ω equivalent resistances, be provided with 7.2mH equivalent inductance in described Section eight, 29.167nF equivalent capacity and 2304 Ω equivalent resistances, be provided with 7.2mH equivalent inductance in described Section nine, 29.167nF equivalent capacity and 2304 Ω equivalent resistances.
6. a kind of test according to claim 1 and 2 multiregion can regulate equivalent load, it is characterized in that: between described three Rdc posts (2) and Section four and Section five of Rs, Cs, Lr post (3), between Section seven and Section eight, be all connected with grading ring (5) by metal link rod (6).
7. a kind of test according to claim 6 multiregion can regulate equivalent load, it is characterized in that: the position that described three Rdc posts (2) and Rs, Cs, Lr post (3) are provided with grading ring (5) is connected by metal link rod (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510204387.7A CN104793027A (en) | 2015-04-27 | 2015-04-27 | Multi-range adjustable equivalent load for experiments |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510204387.7A CN104793027A (en) | 2015-04-27 | 2015-04-27 | Multi-range adjustable equivalent load for experiments |
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| CN104793027A true CN104793027A (en) | 2015-07-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387859A (en) * | 2018-05-02 | 2018-08-10 | 广州赛宝计量检测中心服务有限公司 | Measurement and calibration fictitious load, measurement and calibration instrument and the measurement and calibration system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102486483A (en) * | 2010-12-01 | 2012-06-06 | 中国电力科学研究院 | RLC equivalent load apparatus of direct current converter valve multiple valve test |
| CN102662146A (en) * | 2012-05-21 | 2012-09-12 | 中国西电电气股份有限公司 | High voltage direct current converter valve multiple valve insulation type test equivalent simulation load device |
| CN103063987A (en) * | 2012-12-24 | 2013-04-24 | 保定天威保变电气股份有限公司 | Test method of dry type smoothing reactor end-to-end medium-frequency oscillator capacitor discharge |
| CN202975079U (en) * | 2012-12-24 | 2013-06-05 | 保定天威保变电气股份有限公司 | Load capacitor used for reactor switching impulse test |
| CN203164366U (en) * | 2013-02-26 | 2013-08-28 | 国网智能电网研究院 | Equivalent load device for multi-valve type testing of direct current converter valve |
| CN204575695U (en) * | 2015-04-27 | 2015-08-19 | 四川省绵竹西南电工设备有限责任公司 | A kind of test is with multiregion regulating equivalent load |
-
2015
- 2015-04-27 CN CN201510204387.7A patent/CN104793027A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102486483A (en) * | 2010-12-01 | 2012-06-06 | 中国电力科学研究院 | RLC equivalent load apparatus of direct current converter valve multiple valve test |
| CN102662146A (en) * | 2012-05-21 | 2012-09-12 | 中国西电电气股份有限公司 | High voltage direct current converter valve multiple valve insulation type test equivalent simulation load device |
| CN103063987A (en) * | 2012-12-24 | 2013-04-24 | 保定天威保变电气股份有限公司 | Test method of dry type smoothing reactor end-to-end medium-frequency oscillator capacitor discharge |
| CN202975079U (en) * | 2012-12-24 | 2013-06-05 | 保定天威保变电气股份有限公司 | Load capacitor used for reactor switching impulse test |
| CN203164366U (en) * | 2013-02-26 | 2013-08-28 | 国网智能电网研究院 | Equivalent load device for multi-valve type testing of direct current converter valve |
| CN204575695U (en) * | 2015-04-27 | 2015-08-19 | 四川省绵竹西南电工设备有限责任公司 | A kind of test is with multiregion regulating equivalent load |
Non-Patent Citations (1)
| Title |
|---|
| 魏晓光 等: "±1100kV特高压直流换流阀多重阀绝缘试验", 《智能电网》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387859A (en) * | 2018-05-02 | 2018-08-10 | 广州赛宝计量检测中心服务有限公司 | Measurement and calibration fictitious load, measurement and calibration instrument and the measurement and calibration system |
| CN108387859B (en) * | 2018-05-02 | 2023-11-21 | 广州赛宝计量检测中心服务有限公司 | Analog load for metering calibration, metering calibration instrument and metering calibration system |
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