CN102982930B - A kind of ultra high voltage series compensation MOV crosstalk resistance type damped resistor - Google Patents
A kind of ultra high voltage series compensation MOV crosstalk resistance type damped resistor Download PDFInfo
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- CN102982930B CN102982930B CN201210459029.7A CN201210459029A CN102982930B CN 102982930 B CN102982930 B CN 102982930B CN 201210459029 A CN201210459029 A CN 201210459029A CN 102982930 B CN102982930 B CN 102982930B
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 112
- 239000011787 zinc oxide Substances 0.000 claims abstract description 56
- 239000000919 ceramic Substances 0.000 claims abstract description 20
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 238000013016 damping Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The invention provides a kind of ultra high voltage series compensation MOV crosstalk resistance type damped resistor, described MOV crosstalk resistance type damped resistor comprises MOV part 1 and the linear resistance part 2 of series connection mutually, described MOV part 1 comprises the MOV string 3 of at least two post parallel connections, described MOV string 3 comprises the zinc oxide valve plate 5 of at least two series connection, described linear resistance part 2 comprises at least two resistance strings 4 in parallel, described resistance string 4 comprises the ceramic resistor sheet 6 of at least two series connection, described MOV string 3 increases linear resistance 7 connect with described zinc oxide valve plate 5, the number reducing the described ceramic resistor sheet 6 of described resistance string 4 series connection makes the resistance value of described damped resistor constant.A kind of ultra high voltage series compensation MOV crosstalk resistance type damped resistor provided is provided, the linear resistance of a part is put into each post MOV in parallel to go here and there, connect with zinc oxide valve plate, when the conducting of MOV big current presents low resistance state, the linear resistance of series connection makes the resistance between each post MOV string close, realizes the current-sharing that each post MOV goes here and there.
Description
Technical field
The present invention relates to a kind of damped resistor, be specifically related to a kind of ultra high voltage series compensation MOV crosstalk resistance type damped resistor.
Background technology
String benefit damping device is the visual plant of series compensation device, for amplitude and the frequency of limiting capacitance device group discharging current, reduces discharging current to the infringement of capacitor, by-pass switch and portable protective gaps; And capacitor set discharge electric current is decayed fast, to reduce residual voltage to line-breaker recovery voltage and the latent impact for electric arc.Damping device is composed in parallel by damping reactor and damped resistor two parts, and damping reactor is used for limiting capacitance device group discharging current amplitude and frequency, and damped resistor is used for absorption capacitor group discharge energy.
Damped resistor is divided into gap crosstalk resistance type and MOV(Metal Oxide Varistor, metal oxide varistor) crosstalk resistance type two kinds.Gap crosstalk resistance type damped resistor is made up of gap series linear resistance, and structure is simple, but capacitor set discharge terminates rear line current still flows through linear resistance, and linear resistance thermal capacity increases, and reliability reduces; And gap and linear resistance adopt open type, greatly affected by environment, reliability is not high, needs often to safeguard.MOV crosstalk resistance type damped resistor is become by MOV linear resistor group of connecting, and in the instantaneous input of capacitor set discharge process neutral line resistance with exit, thermal capacity reduces, and reliability improves; MOV and linear resistance adopt closed, and not affected by environment, reliability improves greatly; Shortcoming is that MOV also will absorb energy, and reference voltage is low, thermal capacity is large, needs multicolumn in parallel, the bad solution of equal flow problem; Linear resistance adopts single chip resistance sheet connection in series-parallel composition, and need to adopt multi-core structures, core is complicated.
The line short circuit current of extra-high voltage series compensation is large, and capacitor bank voltage is high, capacity is large, and reliability requirement is high, and damped resistor adopts MOV crosstalk resistance type more reasonable.MOV of the prior art goes here and there resistive type damped resistor and there is following problem:
1, the thermal capacity of the MOV part of MOV crosstalk resistance type damped resistor is very large, be formed in parallel by multicolumn, every post MOV is composed in series by several zinc oxide valve plates, due to the nonlinearity of zinc oxide valve plate voltage-current characteristic, after multicolumn MOV parallel connection, each intercolumniation CURRENT DISTRIBUTION can be very uneven, easily causes valve block technical performance to decline and even damage.
2, every post MOV of MOV crosstalk resistance type damped resistor is in parallel again after adopting absolute construction, volume and weight can be caused to increase a lot, makes troubles to damped resistor production and practicality.
3, damped resistor neutral line resistor disc and zinc oxide valve plate are all ceramic materials, and it is very smooth that contact surface is difficult to do, and has jog more, easily cause actual loose contact, local overheating, cause device failure.
Summary of the invention
The present invention relates to a kind of ultra high voltage series compensation MOV crosstalk resistance type damped resistor, described MOV crosstalk resistance type damped resistor comprises MOV part 1 and the linear resistance part 2 of series connection mutually, described MOV part 1 comprises the MOV string 3 of at least two post parallel connections, described MOV string 3 comprises the zinc oxide valve plate 5 of at least two series connection, described linear resistance part 2 comprises at least two resistance strings 4 in parallel, described resistance string 4 comprises the ceramic resistor sheet 6 of at least two series connection, described MOV string 3 increases linear resistance 7 connect with described zinc oxide valve plate 5, the number reducing the described ceramic resistor sheet 6 of described resistance string 4 series connection makes the resistance value of described damped resistor constant.
In first preferred embodiment provided by the invention: described zinc oxide valve plate 5, ceramic resistor sheet 6 and linear resistance 7 form the core body of described MOV crosstalk resistance type damped resistor, described core body comprises core unit 8, and described core unit 8 comprises the described MOV string 3 and a described resistance string 4 vertically placed successively from top to bottom;
The quantity of the MOV string 3 of described vertical placement is at least two, upper end or lower end are linear resistance end or zinc oxide valve plate end, the described linear resistance end of the close described MOV string 3 be adjacent of the described linear resistance end of MOV string 3 described in any one, described zinc oxide valve plate end is near the described zinc oxide valve plate end of the described MOV string 3 be adjacent; Same one end of any two adjacent described MOV strings 3 is connected by short circuit sheet 9, and the described linear resistance end of all described MOV strings 3 is interconnected, and described zinc oxide valve plate end is interconnected;
The MOV string 3 of described at least two is interconnected rear one end near described resistance string 4 and described resistance string 4 is connected in series.
In second preferred embodiment provided by the invention: be encapsulated in insulating coating after 2-3 described core unit 8 parallel connection.
In 3rd preferred embodiment provided by the invention: the described linear resistance 7 that described MOV string 3 comprises and the described ceramic resistor sheet 6 that described resistance string 4 comprises are linear resistance sheet, and described linear resistance sheet and described zinc oxide valve plate 5 are pie ceramic component;
In the middle of the contact-making surface of any two interconnective described linear resistance sheets and described linear resistance sheet, described linear resistance sheet and described zinc oxide valve plate 5 or described zinc oxide valve plate 5 and described zinc oxide valve plate 5, Using copper mesh gaskets 10 is set.
In 4th preferred embodiment provided by the invention: described MOV part 1 comprises 25 described MOV strings 3 in parallel, each MOV string 3 comprises described zinc oxide valve plate 5 and 2 described linear resistances 7 of 8 series connection, and described linear resistance part 2 comprises 5 described resistance strings 4 in parallel;
Described zinc oxide valve plate 5 is Toshiba QA22 zinc oxide valve plate, and described linear resistance 7 is 3 ohm.
The beneficial effect of a kind of ultra high voltage series compensation MOV crosstalk resistance type damped resistor provided by the invention comprises:
1, a kind of ultra high voltage series compensation MOV crosstalk resistance type damped resistor provided by the invention, the linear resistance of a part is put into each post MOV in parallel to go here and there, connect with zinc oxide valve plate, when the conducting of MOV big current presents low resistance state, the linear resistance of series connection makes the resistance between each post MOV string close, realizes the current-sharing that each post MOV goes here and there.
2, the invention provides a kind of core design of damped resistor, utilize short circuit sheet to change the parallel-connection structure in MOV partial electric into structural cascaded structure, be installed in series with linear resistance, greatly reduce the volume and weight of damped resistor.
3, between interconnective resistor disc or valve block, place Using copper mesh gaskets, copper mesh is placed between resistor disc or valve block contact surface, make surface contact good by crimping distortion, and be conducive to heat radiation.
Accompanying drawing explanation
Be illustrated in figure 1 the electrical structure diagram of MOV crosstalk resistance type damped resistor in prior art;
Be illustrated in figure 2 the electrical structure diagram of the embodiment of a kind of ultra high voltage series compensation MOV crosstalk resistance type damped resistor provided by the invention;
Be illustrated in figure 3 the current-sharing design sketch of simulated measurement in two post MOV connection in series-parallel situations in prior art;
Be illustrated in figure 4 the current-sharing design sketch of simulated measurement in two post MOV connection in series-parallel situations in the embodiment of a kind of ultra high voltage series compensation MOV crosstalk resistance type damped resistor provided by the invention;
Be illustrated in figure 5 the MOV string of absolute construction in prior art and the connection diagram of resistance string;
Be illustrated in figure 6 the structural representation of the core unit of a kind of MOV crosstalk resistance type damped resistor provided by the invention;
Be illustrated in figure 7 the interconnective structural representation of multiple core unit provided by the invention;
Be illustrated in figure 8 the schematic diagram that Using copper mesh gaskets is set between any two adjacent linear resistance sheets provided by the invention or zinc oxide valve plate;
Be illustrated in figure 9 the structural representation of string benefit MOV crosstalk resistance type damped resistor in ultra high voltage center line extension project provided by the invention;
In figure: 1 is MOV part; 2 is linear resistance part; 3 is MOV string; 4 is resistance string; 5 is zinc oxide valve plate; 6 is ceramic resistor sheet; 7 is linear resistance; 8 is core unit; 9 is short circuit sheet; 10 is Using copper mesh gaskets.
Embodiment
MOV crosstalk resistance type damped resistor comprises MOV part 1 and the linear resistance part 2 of series connection mutually, MOV part 1 comprises the MOV string 3 of at least two post parallel connections, MOV string 3 comprises the zinc oxide valve plate 5 of at least two series connection, linear resistance part 2 comprises at least two resistance strings 4 in parallel, resistance string 4 comprises the ceramic resistor sheet 6 of at least two series connection, the invention provides a kind of ultra high voltage series compensation MOV crosstalk resistance type damped resistor, a part of ceramic resistor sheet 6 is extracted out from every columnar resistance string 4 of linear resistance part 2, to every post MOV string 3 series connection linear resistances 7 of MOV part 1, MOV string is made to comprise zinc oxide valve plate 5 and the linear resistance 7 of series connection, and ensureing MOV part 1 and the resistance that linear resistance part 2 is connected and resistance string 4 to extract a part of ceramic resistor sheet 6 and MOV out, to go here and there 3 resistance of connecting before linear resistance 7 identical.
Be the technical parameter table of ultra high voltage series compensation MOV crosstalk resistance type damped resistor as shown in Table 1:
Table one: the ultra high voltage series compensation technical parameter table of MOV crosstalk resistance type damped resistor
Carry out Preliminary design according to the technical parameter in table one to draw, MOV part needs the MOV string of 25 post parallel connections, each MOV string is the zinc oxide valve plate of 8 series connection, and linear resistance part needs 5 resistance strings in parallel, and each resistance string is the ceramic resistor sheet of 50 series connection.
Be illustrated in figure 1 the electrical structure diagram of MOV crosstalk resistance type damped resistor in prior art, as shown in Figure 1, MOV crosstalk resistance type damped resistor comprises MOV part 1 and the linear resistance part 2 of series connection, MOV part 1 comprises 25 MOV strings 3 in parallel, each MOV string 3 comprises the Toshiba QA22 zinc oxide valve plate 5 of 8 series connection, and linear resistance part 2 comprises 5 resistance strings 4 in parallel.
The electrical structure diagram of the embodiment of a kind of ultra high voltage series compensation MOV crosstalk resistance type damped resistor provided by the invention as shown in Figure 2, as shown in Figure 2, each MOV string comprises 8 zinc oxide valve plates 5 and 2 linear resistances 7 of series connection, concrete, this zinc oxide valve plate 5 is Toshiba QA22 zinc oxide valve plate, and linear resistance 7 is 3 ohm.From linear resistance part 2, extract a part of ceramic resistor sheet 6 out go here and there 3 to every post MOV, every post MOV string 3 is connected with linear resistance 7, when the conducting of MOV big current presents low configuration, the linear resistance 7 of series connection is flows resistance, make resistance between the MOV of each parallel connection string 3 close, realize current-sharing between each post MOV string 3.
Due to the nonlinearity of zinc oxide valve plate voltage-current characteristic, when multicolumn MOV string 3 is in parallel, the little deviation of intercolumniation voltage-current characteristic can cause the extremely uneven of intercolumniation CURRENT DISTRIBUTION, have a strong impact on MOV technical performance and reliability, be illustrated in figure 3 two post MOV in prior art and go here and there the current-sharing design sketch of simulated measurement in 3 situations in parallel, as shown in Figure 3, when the voltage-current characteristic of two post MOV strings 3 differs 1.5%, current deviation can up to 28.6%.
Be illustrated in figure 4 the current-sharing design sketch of simulated measurement in two post MOV connection in series-parallel situations in the embodiment of a kind of ultra high voltage series compensation MOV crosstalk resistance type damped resistor provided by the invention, as shown in Figure 4, the embodiment of MOV crosstalk resistance type damped resistor provided by the invention, after MOV string 3 is connected with linear resistance 7, linear resistance plays the effect of current-sharing, when the voltage-current characteristic of two post MOV strings 3 differs 1.5%, current deviation, about 3%, well solves the series-parallel equal flow problem of multicolumn MOV.
Further, select 15 post MOV to go here and there 3 parallel connections and carry out current-sharing test, gone here and there by 15 post MOV and 3 be divided into 3 groups, to be often that 5 post MOV go here and there 3 in parallel for group.First respectively to often organizing applying one impulse current, measuring the electric current by every post MOV string 3, calculating maximum current skewness coefficient in each group.Then by above 3 groups of parallel connections, one impulse current is applied to it, measure the electric current by often organizing, calculate maximum current skewness coefficient between each group, organizing CURRENT DISTRIBUTION nonuniformity coefficient sum between interior and group is 3.3%, show the current equalizing structure design of MOV string series connection linear resistance in the embodiment of a kind of ultra high voltage series compensation MOV crosstalk resistance type damped resistor provided by the invention, well solve equal flow problem during multicolumn MOV connection in series-parallel.
Every post MOV of the prior art goes here and there and adopts absolute construction, be illustrated in figure 5 the MOV string of absolute construction in prior art and the connection diagram of resistance string, every post MOV string 3 and resistance string 4 all adopt absolute construction, MOV partial core body and linear resistance partial core body is formed respectively after parallel connection, MOV partial core body and linear resistance partial core body are combined to form damped resistor core body, then core body number is too much, insulating coating increased number is used in encapsulation, causes the increase of damped resistor complex structure, size, weight increase.
Preferably, the invention provides a kind of MOV crosstalk resistance type damped resistor core unit 8, MOV string 3 comprises linear resistance 7 and the zinc oxide valve plate 5 of series connection, it is linear resistance end that this MOV goes here and there 3 one end, the other end is zinc oxide valve plate end, multicolumn MOV string 3 is vertically placed from top to bottom successively, each MOV string 3 upper, lower end is linear resistance end or zinc oxide valve plate end, the linear resistance end of the close MOV string 3 be adjacent of the linear resistance end of any one MOV string 3, zinc oxide valve plate end is near the zinc oxide valve plate end of the MOV string 3 be adjacent, same one end of any two adjacent MOV strings 3 is connected again successively respectively by short circuit sheet 9, the linear resistance end of all MOV strings 3 is interconnected, zinc oxide valve plate end is interconnected, its structural representation as shown in Figure 6, utilize short circuit sheet 9 to be gone here and there by multicolumn MOV and 3 to be become series connection on mounting structure from the parallel connection on electrical structure, and then connect with a resistance string 4 of linear resistance part 2, a core body of composition damped resistor, core is simplified, size reduces.
Be illustrated in figure 7 the structural representation of multiple core unit provided by the invention, be encapsulated in insulating coating after the parallel connection of 2-3 core unit 8, thus substantially reduce damped resistor core unit number and composite sheath number, damped resistor size reduces greatly, weight alleviates greatly, facilitates and installs and use.For extra-high voltage series compensation damped resistor, after adopting core unit provided by the invention, quantity reduces to 10, and composite sheath quantity reduces to 4.
A kind of MOV crosstalk resistance type damped resistor provided by the invention comprises MOV string 3 and resistance string 4, the linear resistance 7 that MOV string 3 comprises and the ceramic resistor sheet 6 that resistance string 4 comprises are linear resistance sheet, linear resistance sheet and zinc oxide valve plate 5 are pie ceramic component, and ceramic material contact surface has jog, and compress variation is little, so cause resistor disc or valve block to contact insufficient, easily cause local through-flow, internal current skewness, damped resistor technical performance can be made to decline, even cause resistor disc or valve block to damage.
The invention provides in a kind of preferred embodiment of MOV crosstalk resistance type damped resistor, in the middle of the contact-making surface of any two interconnective linear resistance sheets and linear resistance sheet, linear resistance sheet and zinc oxide valve plate 5 or zinc oxide valve plate 5 and zinc oxide valve plate 5, Using copper mesh gaskets 10 is set, be illustrated in figure 8 the schematic diagram that Using copper mesh gaskets is set between any two adjacent linear resistance sheets provided by the invention or zinc oxide valve plate 5, copper mesh is good conductor of electricity and heat carrier, be easy to make and use, deformation can be produced during compression and make that upper and lower contact-making surface fully contacts, good heat transfer.
Be illustrated in figure 9 the structural representation of string benefit MOV crosstalk resistance type damped resistor in ultra high voltage center line extension project provided by the invention.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of right of the present invention.
Claims (5)
1. a ultra high voltage series compensation MOV crosstalk resistance type damped resistor, described MOV crosstalk resistance type damped resistor comprises MOV part (1) and the linear resistance part (2) of series connection mutually, described MOV part (1) comprises MOV string (3) of at least two post parallel connections, described MOV string (3) comprises the zinc oxide valve plate (5) of at least two series connection, described linear resistance part (2) comprises at least two resistance strings (4) in parallel, described resistance string (4) comprises the ceramic resistor sheet (6) of at least two series connection, it is characterized in that, described MOV string (3) increases linear resistance (7) connect with described zinc oxide valve plate (5), the number reducing the described ceramic resistor sheet (6) that described resistance string (4) is connected makes the resistance value of described damped resistor constant.
2. MOV crosstalk resistance type damped resistor as claimed in claim 1, it is characterized in that, described zinc oxide valve plate (5), ceramic resistor sheet (6) and linear resistance (7) form the core body of described MOV crosstalk resistance type damped resistor, described core body comprises core unit (8), and described core unit (8) comprises at least two described MOV string (3) and described resistance strings (4) of vertically placing successively from top to bottom;
Upper end or the lower end of MOV string (3) of described vertical placement are linear resistance end or zinc oxide valve plate end, the described linear resistance end of close described MOV string (3) be adjacent of the described linear resistance end of MOV string (3) described in any one, described zinc oxide valve plate end is near the described zinc oxide valve plate end of described MOV string (3) be adjacent; Same one end of any two adjacent described MOV string (3) is connected by short circuit sheet (9), and the described linear resistance end of all described MOV string (3) is interconnected, and described zinc oxide valve plate end is interconnected;
MOV string (3) described at least two is interconnected rear one end near described resistance string (4) and described resistance string (4) is connected in series.
3. MOV crosstalk resistance type damped resistor as claimed in claim 2, is characterized in that, is encapsulated in insulating coating after 2-3 described core unit (8) parallel connection.
4. MOV crosstalk resistance type damped resistor as claimed in claim 1, it is characterized in that, the described linear resistance (7) that described MOV string (3) comprises and the described ceramic resistor sheet (6) that described resistance string (4) comprises are linear resistance sheet, and described linear resistance sheet and described zinc oxide valve plate (5) are pie ceramic component;
In the middle of the contact-making surface of any two interconnective described linear resistance sheets and described linear resistance sheet, described linear resistance sheet and described zinc oxide valve plate (5) or described zinc oxide valve plate (5) and described zinc oxide valve plate (5), Using copper mesh gaskets (10) is set.
5. MOV crosstalk resistance type damped resistor as claimed in claim 1, it is characterized in that, described MOV part (1) comprises 25 described MOV string (3) in parallel, each MOV string (3) comprises described zinc oxide valve plate (5) and 2 described linear resistances (7) of 8 series connection, and described linear resistance part (2) comprises 5 described resistance strings (4) in parallel;
Described zinc oxide valve plate (5) for Toshiba QA22 zinc oxide valve plate, described linear resistance (7) be 3 ohm.
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|---|---|---|---|
| CN201210459029.7A CN102982930B (en) | 2012-11-14 | 2012-11-14 | A kind of ultra high voltage series compensation MOV crosstalk resistance type damped resistor |
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| CN201210459029.7A CN102982930B (en) | 2012-11-14 | 2012-11-14 | A kind of ultra high voltage series compensation MOV crosstalk resistance type damped resistor |
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| CN102982930B true CN102982930B (en) | 2015-11-04 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4625254A (en) * | 1983-06-17 | 1986-11-25 | Asea Aktiebolag | Voltage trigger means for a series capacitor protector |
| CN1467758A (en) * | 2002-07-09 | 2004-01-14 | 中国电力科学研究院 | Slice matching method for large capacity metal oxide pressure-limiting device |
| GB2421860B (en) * | 2004-12-29 | 2008-03-19 | Hewlett Packard Development Co | Common mode surge protection filter |
| CN203038738U (en) * | 2012-11-14 | 2013-07-03 | 中国电力科学研究院 | MOV string resistance damping resistor for extra-high voltage series compensation |
-
2012
- 2012-11-14 CN CN201210459029.7A patent/CN102982930B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4625254A (en) * | 1983-06-17 | 1986-11-25 | Asea Aktiebolag | Voltage trigger means for a series capacitor protector |
| CN1467758A (en) * | 2002-07-09 | 2004-01-14 | 中国电力科学研究院 | Slice matching method for large capacity metal oxide pressure-limiting device |
| GB2421860B (en) * | 2004-12-29 | 2008-03-19 | Hewlett Packard Development Co | Common mode surge protection filter |
| CN203038738U (en) * | 2012-11-14 | 2013-07-03 | 中国电力科学研究院 | MOV string resistance damping resistor for extra-high voltage series compensation |
Non-Patent Citations (1)
| Title |
|---|
| 500KV串补与可控串补中限压器（MOV）的研究;刘之方;《中国优秀博硕士学位论文全文数据库 (硕士) 工程科技Ⅱ辑 》;20021215(第2期);全文 * |
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Inventor after: Li Zhibing Inventor after: Wang Chengyu Inventor after: Guo Jianbo Inventor after: Cui Boyuan Inventor after: Liu Beiyang Inventor after: Ji Yansong Inventor after: Wang Hao Inventor after: Yan Xianglian Inventor after: Cao Dexin Inventor before: Li Zhibing Inventor before: Wang Chengyu Inventor before: Cui Boyuan Inventor before: Liu Beiyang Inventor before: Ji Yansong Inventor before: Wang Hao Inventor before: Yan Xianglian Inventor before: Cao Dexin |
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Free format text: CORRECT: INVENTOR; FROM: LI ZHIBING WANG CHENGYU CUI BOYUAN LIU BEIYANG JI YANSONG WANG HAO YAN XIANGLIAN CAO DEXIN TO: LI ZHIBING WANG CHENGYU GUO JIANBO CUI BOYUAN LIU BEIYANG JI YANSONG WANG HAO YAN XIANGLIAN CAO DEXIN |
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