CN100373603C - Water delivery and distribution pipeline system of standing reactive compensator thyristor velve set - Google Patents
Water delivery and distribution pipeline system of standing reactive compensator thyristor velve set Download PDFInfo
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- CN100373603C CN100373603C CNB2005101026601A CN200510102660A CN100373603C CN 100373603 C CN100373603 C CN 100373603C CN B2005101026601 A CNB2005101026601 A CN B2005101026601A CN 200510102660 A CN200510102660 A CN 200510102660A CN 100373603 C CN100373603 C CN 100373603C
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Abstract
The present invention relates to a water feeding and distributing pipeline system for a thyristor valve group of a static var compensator. The valve group has three phases, a water feeding and distributing pipeline of the valve group uses a parallel connection mode, and the flow rate of the three phases is balanceable; devices in the valve group are combined and arranged in a blocking compression joint mode, and a water feeding and distributing hose of the valve group uses a series connection or parallel connection mode. A water distributing main pipe which is arranged is used as a water separator, choked flow components are arranged in the water distributing hose, a proper gradient and an automatic exhaust valve are arranged in the pipeline, and an equipotential column is arranged on the specific design point of an insulation pipeline; a sealing ring has multiple sealing water waves which intimately tally with the sealing surface of a flange, and multiple sealing protection effects are achieved. The present invention has the advantages of reasonable system structure and uniform flow rate distribution; the pipeline uses equipotential design and uses multiple measures to ensure the seal of cooling mediums and the automatic elimination of gas.
Description
Technical field
The present invention relates to the thyristor valve of Static Var Compensator in electric power system and the power electronic technology (SVC), particularly a kind of water delivery and distribution pipeline system of thyristor valve group.
Background technology
Along with the extensive use of the application of high-voltage and high-power power electronic device, particularly 35kV and following electric pressure Static Var Compensator, adopt ultra-pure water also to be used widely as the closed circulating water cooling system equipment of coolant.The water delivery and distribution pipeline system of thyristor valve group is carried the ultra-pure water of constant flow rate, pressure, conductivity, temperature and be dispensed in each cooling unit: thyratron transistor valve water-cooling fin and water-cooled grading resistor, carry out circulating after the abundant heat exchange.Water delivery and distribution pipeline system is guaranteed the insulation and the balance of voltage between device and valve body with the insulator of coolant as valve body simultaneously.
In the water delivery and distribution pipeline system of prior art, because insulation property, chemical property, Study on mechanical properties deficiency to pure water conveyance conduit material under the high voltage environment, adopted some as materials such as ABS or PVC, caused the leakage problems under aging, the continuous high temperature condition of high voltage, influenced the normal heat radiation of device even caused the generation of accident.Simultaneously because the pipe-line system unreasonable structure, also occur because of the inflow-rate of water turbine proportioning unbalanced, the obstructed problem that causes device overtemperature and insulation breakdown of pipe-line system exhaust.
Between device and the valve body interlayer, all can there be high potential difference, this potential difference acts directly on water column two ends in insulation distributing pipe line and the pipeline, as this segment pipe dielectric strength deficiency, may cause too high leakage current even insulation breakdown.
Therefore, the water delivery and distribution pipeline system of the thyristor valve group of Static Var Compensator is as the terminal of closed circulating water cooling system equipment, not only bear the function of carrying coolant, also as insulator, become the valve block structure design of Static Var Compensator thyristor and the important step in the electrical design simultaneously.The Rational structure of valve group water delivery and distribution pipeline system is the prerequisite that adopts ultra-pure water effectively to work as the closed circulating water cooling system equipment of coolant.
Summary of the invention
In order to overcome the above-mentioned defective in the middle of the prior art, the purpose of this invention is to provide the Rational structure of the thyristor valve group water delivery and distribution pipeline system of a kind of 35kV and following electric pressure Static Var Compensator.
The technical scheme of Static Var Compensator thyristor valve water delivery and distribution pipeline system of the present invention is:
Device is with the pattern assembled arrangement of crimping in groups in the valve group, and valve group transmission ﹠ distribution water tube hose adopts the mode of serial or parallel connection; SVC valve component is a three-phase, the operating mode of every phase is in full accord, therefore the valve group water-supply pipeline of three-phase cooling water adopts parallel way, and the cooling water water inlet manifold enters single-phase valve body by three-phase water main respectively, is collected to the return main by three-phase backwater main again and flows out; Each phase main loss of flood peak unanimity makes the three-phase flow balance.
Selection dielectric strength height, the engineering plastics that mechanical strength is moderate and ageing resistace is superior are as the carrier of transmission ﹠ distribution water.
The female pipe of water distribution is set, is pro rata distributed to device or its radiator in the main water route, the female pipe of water distribution is born the function of branch road flow equilibrium as water knockout drum.
The choked flow element is set, with the balance of the flow pressure reduction of controlling whole distributing pipe line system in the water distribution flexible pipe.
The suitable gradient is set in pipeline, preferably 1～2 °, is beneficial to compiling of gas, the automatic exhaust steam valve of floating ball lever type is set at the high-order gas junction of backwater main, be pooled to certain storage at gas, valve opening is opened automatically gas is got rid of automatically, simultaneously the water throttling can not overflowed.
Particular design point at isolated pipe is provided with the equipotential post, and it is realized fixed potential, avoids the generation of accident.
Between transmission ﹠ distribution supply mains and main, main adopted flange to be connected with the sealing between the female pipe of water distribution, has many convex annular seal water waves on the sealing ring, sealing water wave and flange sealing surface groove are identical closely, reach multiple sealing protection effect.
Water-supply pipeline is connected employing as shape face face sweat soldering mode with pipe fitting (or moisturizing joint), reach intermolecular distance and form one, has guaranteed the fastness of water-supply pipeline, and is non-leakage lastingly.
Technical scheme of the present invention also comprises:
The leakage current in water route calculates:
The leakage current in insulation water distribution water route comprises the leakage current of fluid media (medium) and the leakage current of pipeline, and wherein the calculating of the leakage current of pipeline is one of definite main foundation of selection pipeline material and specification, also is one of major parameter of valve group electrical design.
I＝UA/σL
I is a leakage current, and unit is mA,
σ is a specific insulation, and unit is M Ω .cm,
U is for applying voltage, and unit is V,
A is a sectional area, and unit is cm
2
L is a length, and unit is cm.
Adopt following formula to calculate, when the pipe material specific insulation that is adopted greater than 1 * 10
16During M Ω .cm, when the unit length pipeline is executed voltage 50KV, the leakage current of the isolated pipe of can ignoring.
The flow equilibrium design:
Heat sink side water distribution branch road flow Q1 and device-side water distribution branch road flow Q2 meet following relation:
Q1∶Q2＝(ΔP2+ΔP4)∶(ΔP1+ΔP3)
Δ P1 is the intrinsic water resistance sum of radiator and water distribution flexible pipe; Δ P2 is the intrinsic water resistance sum of device and water distribution flexible pipe;
Δ P3, Δ P4 are choked flow element water resistance, and the choked flow element is arranged on the actual flow of each device of balance in the water distribution flexible pipe or its radiator, with the balance of the flow pressure reduction of controlling whole distributing pipe line system;
Verify by flowrate proportioning then: seal in flowmeter in heat sink side and device-side respectively, regulate pressure of supply water, be recorded in the flow value under the different pressures, verified.
Owing to adopted above-mentioned technical scheme, the invention has the beneficial effects as follows: the coolant that has solved closed circulating water cooling system equipment is carried and the problem of distributing to valve group device or its radiator, satisfies its instructions for use under high voltage environment for a long time simultaneously.System configuration of the present invention is reasonable, and assignment of traffic is even, adopts multiple measure to guarantee the sealing of coolant and removing automatically of gas, and the useful life of all insulating material of pipe-line system of the present invention under rated condition was greater than 25 years.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the water delivery and distribution pipeline system sketch of the water delivery and distribution pipeline system structure of a kind of thyristor valve group of the present invention.
Fig. 2 is transmission ﹠ distribution water conduit tube and female pipe sketch of a kind of thyristor valve group of the present invention.
Fig. 3 is the branch road water distribution flexible pipe sketch of the water delivery and distribution pipeline system structure of a kind of thyristor valve group of the present invention.
Fig. 4 is the withstand voltage test figure as a result in water route of the present invention.
Embodiment
Referring to accompanying drawing, the present invention solves the technical scheme that its technical problem takes and comprises following content:
1) leakage current in water route calculates
The leakage current in insulation water distribution water route comprises the leakage current of fluid media (medium) and the leakage current of pipeline, and it is one of definite main foundation of selection pipeline material and specification that the leakage current of pipeline calculates, and also is one of major parameter of valve group electrical design.
I＝UA/σL
I is a leakage current, and unit is mA,
σ is a specific insulation, and unit is M Ω .cm,
U is for applying voltage, and unit is V,
A is a sectional area, and unit is cm
2
L is a length, and unit is cm.
Adopt following formula to calculate, when the pipe material specific insulation that is adopted greater than 1 * 10
16During M Ω .cm, when the unit length pipeline is executed voltage 50KV, the leakage current of the isolated pipe of can ignoring.
In laboratory withstand voltage type approval test has been carried out in the water route, result of the test such as Fig. 4.
2) flow equilibrium design
Referring to accompanying drawing 1, device is with the pattern assembled arrangement of crimping in groups in the valve group, and valve group water-supply pipeline also requires to adopt the mode of serial or parallel connection according to the heat radiation of device.SVC valve component is a three-phase, and the operating mode of every phase is in full accord, so the three-phase cooling water adopts parallel way, and the cooling water water inlet manifold enters single-phase valve body by three-phase water main respectively, is collected to the return main by three-phase backwater main again and flows out.Each phase main loss of flood peak unanimity makes the three-phase flow balance.
Referring to accompanying drawing 2, SVC valve body design consideration loop peak current is determined the arrangement mode of device; The arrangement mode of water distribution design consideration device is provided with the female pipe of water distribution, is pro rata distributed to device or its radiator in the main water route, and the female pipe of water distribution is as water knockout drum, and burden branch road flow is divided the function of joining equally.
Referring to accompanying drawing 3, determine the required cooling medium consumption value of passing through of each water distribution flexible pipe branch road according to the dissipation power of device, thyristor during the design of SVC valve body; Because there are situation inequality in the operating mode and the structural shape of each device or its radiator, each device or its Design of for heat sinks flow and water resistance are also inequality, therefore need be by the actual flow of each device of choked flow element balance or its radiator be set in the water distribution flexible pipe, balance with the flow pressure reduction of controlling whole distributing pipe line system
Q1∶Q2＝(ΔP2+ΔP4)∶(ΔP1+ΔP3)
Q1 is a heat sink side water distribution branch road flow, and Δ P1 is the intrinsic water resistance sum of radiator and water distribution flexible pipe;
Q2 is a device-side water distribution branch road flow, and Δ P2 is the intrinsic water resistance sum of device and water distribution flexible pipe;
Δ P3, Δ P4 are choked flow element water resistance, determine to be provided with according to reality.
In the flowrate proportioning test, verify then.Seal in flowmeter in heat sink side and device-side respectively, regulate pressure of supply water, be recorded in the flow value under the different pressures, verified.
3) vent design
In valve group water delivery and distribution pipeline system any one, coolant must be a flowing full all, can not in time discharge if there is gas in the pipeline, can cause the discharge under high voltage electric field, punctures isolated pipe or device.Therefore in whole water delivery and distribution pipeline system, must consider the smooth and easy timely of exhaust.
Referring to accompanying drawing 2, consider the suitable gradient (1～2 °) in pipe design and in installing, help compiling of gas, the automatic exhaust steam valve of floating ball lever type is set at backwater main high level, when gas pressure in the automatic exhaust steam valve during greater than the power that disseats of ball float, valve opening is opened automatically with air scavenge, simultaneously the water throttling can not overflowed.
4) equipotential design
Referring to accompanying drawing 2, bulk potential and cooling water current potential may exist inconsistent, and be bigger as potential difference, might generation office put, and the tube wall of pipeline is corroded, therefore the equipotential post is set at the particular design point that requires according to electric insulation, it is realized fixed potential, avoid the generation of accident.
5) seal for pipe joints (Base Material)
Referring to accompanying drawing 2, between transmission ﹠ distribution supply mains and main, main adopts flange to be connected with the sealing between the female pipe of water distribution, it is the engineering plastics of Base Material that valve group inner flange has adopted with POM, both met the requirement of insulation, make it in electric field, can not form floating potential, while plastics flange and plastic fastener thereof possess enough intensity with gentle wilful, and the enough sealing Tightening moments and the expansion or the contraction displacement of variations in temperature generation can be provided.The flange seal circle has adopted the sealing ring as Base Material with EPDM, increases filler simultaneously when moulding, to strengthen its rigidity.This sealing ring can adapt to the sealing of pure water for a long time and can not wear out under electric field environment.Sealing water wave and sealing surface on the sealing ring are identical closely, reach multiple sealing protection effect.(referring to accompanying drawing 3)
6) insulating material under the high voltage environment
Valve group water-supply pipeline has adopted nylon family and polypropylene family as basic material, the power electronic equipment that can adapt to 35kV and following electric pressure, nylon family that this is specific and polypropylene family tubing can satisfy the pressure and temperature requirement of coolant, has stable chemical properties simultaneously, can avoid the pipeline ion dissociation to enter coolant, cause the rising of coolant conductivity.
Simultaneously, adopted picture shape face face sweat soldering and thermoplastic processing technology in plastic conduit processing, special special-purpose integral type welding machine is realized accurately processing on the basis of accurate control temperature and mechanical trip location.
Mark in the accompanying drawing is respectively: the female pipe of 1 water distribution (water supply), and the female pipes of 2 water distributions (backwater), 3.4 flanges connect external member, 5 automatic exhaust steam valves, 6 water mains, 7 backwater mains, 8 equipotential binding posts, 9 water-filled radiators, 10 water distribution flexible pipes, 11 (built-in) choked flow element.
Claims (5)
1. the water delivery and distribution pipeline system of a thyristor valve group is characterized in that: device is with the pattern assembled arrangement of crimping in groups in the valve group, and valve group transmission ﹠ distribution water tube hose adopts the mode of serial or parallel connection; The valve component of static passive compensation device is a three-phase, the operating mode of every phase is in full accord, valve group water-supply pipeline adopts parallel way, and the cooling water water inlet manifold enters single-phase valve body by the three-phase water main respectively, is collected to the return main by three-phase backwater main again and flows out; Each phase main loss of flood peak unanimity, the three-phase flow balance;
In water-supply pipeline, be provided as the female pipe of water distribution of water knockout drum, pro rata distributed to device in the main water route;
The choked flow element of the flow pressure balance of the whole distributing pipe line of control system is set in the water distribution flexible pipe, makes heat sink side water distribution branch road flow Q1 and device-side water distribution branch road flow Q2 meet following relation:
Q1∶Q2＝(ΔP2+ΔP4)∶(ΔP1+ΔP3)
Δ P1 is the intrinsic water resistance sum of radiator and water distribution flexible pipe; Δ P2 is the intrinsic water resistance sum of device and water distribution flexible pipe;
Δ P3, Δ P4 are choked flow element water resistance;
Verify by flowrate proportioning then: seal in flowmeter in heat sink side and device-side respectively, regulate pressure of supply water, be recorded in the flow value under the different pressures, verified;
The suitable gradient is set in pipeline, is beneficial to compiling of gas; At the high-order gas junction of backwater main the automatic exhaust steam valve of floating ball lever type is set, is pooled to certain storage at gas, valve opening is opened automatically gas is got rid of automatically, simultaneously the water throttling can not overflowed;
The equipotential post is set in isolated pipe, it is realized fixed potential.
2. the water delivery and distribution pipeline system of a kind of thyristor valve group according to claim 1, it is characterized in that: pipeline adopted as the sweat soldering of shape face face with being connected of pipe fitting, between transmission ﹠ distribution supply mains and main, main adopts flange to be connected with the sealing between the female pipe of water distribution, have many convex annular seal water waves on the sealing ring, sealing water wave and flange sealing surface groove are identical closely.
3. the water delivery and distribution pipeline system of a kind of thyristor valve group according to claim 1 and 2 is characterized in that: it is the engineering plastics of Base Material that valve group inner flange adopts with POM; Valve group water-supply pipeline adopts nylon family and polypropylene family as basic material; The flange seal circle adopts with the sealing ring of EPDM as Base Material, increases filler simultaneously when moulding, to strengthen its rigidity.
4. the water delivery and distribution pipeline system of a kind of thyristor valve group according to claim 1 and 2 is characterized in that: the gradient that is provided with in pipeline is 1～2 °.
5. the water delivery and distribution pipeline system of a kind of thyristor valve group according to claim 1 is characterized in that: the leakage current computational methods in the water route of water delivery and distribution pipeline system are:
The leakage current in insulation water distribution water route comprises the leakage current of fluid media (medium) and the leakage current of pipeline, and wherein the calculating of the leakage current of pipeline is one of definite main foundation of selection pipeline material and specification, also is one of major parameter of valve group electrical design;
I＝UA/σL
I is a leakage current, and unit is mA,
σ is a specific insulation, and unit is M Ω .cm,
U is for applying voltage, and unit is V,
A is a sectional area, and unit is cm
2
L is a length, and unit is cm;
Adopt following formula to calculate, when the pipe material specific insulation that is adopted greater than 1 * 10
16During M Ω .cm, when the unit length pipeline is executed voltage 50KV, the leakage current of the isolated pipe of can ignoring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2005101026601A CN100373603C (en) | 2005-09-13 | 2005-09-13 | Water delivery and distribution pipeline system of standing reactive compensator thyristor velve set |
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|---|---|---|---|
| CNB2005101026601A CN100373603C (en) | 2005-09-13 | 2005-09-13 | Water delivery and distribution pipeline system of standing reactive compensator thyristor velve set |
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| CN1753173A CN1753173A (en) | 2006-03-29 |
| CN100373603C true CN100373603C (en) | 2008-03-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101651135B (en) * | 2009-08-12 | 2010-12-29 | 荣信电力电子股份有限公司 | 66kV optically-controlled water-cooled thyristor valve group |
| CN102791113A (en) * | 2012-08-16 | 2012-11-21 | 广州高澜节能技术股份有限公司 | Cooling pipeline system in multi-megawatt converter cabinet |
| CN103579147B (en) * | 2013-11-06 | 2016-09-21 | 国家电网公司 | A kind of equipotential electrode for converter valve |
| CN105650368B (en) * | 2014-11-20 | 2018-08-28 | 国家电网公司 | A kind of high-voltage isulation water pipe |
| CN105987282B (en) * | 2015-01-30 | 2019-03-08 | 国家电网公司 | A kind of converter valve parallel connection water route flow matches method |
| CN104917499B (en) * | 2015-06-24 | 2019-02-05 | 国家电网公司 | A kind of 110kV grade thyristor valve body |
| CN104934390B (en) * | 2015-06-24 | 2018-07-13 | 国家电网公司 | A kind of water-cooling heat radiating device for 110kV thyristor valve bodies |
| CN108050009B (en) * | 2017-12-05 | 2019-10-01 | 华北电力大学 | A kind of high potential energy supplying system and its construction method based on insulating liquid driving |
| CN109119407A (en) * | 2018-09-19 | 2019-01-01 | 常州博瑞电力自动化设备有限公司 | A kind of big component silicon stack structure of thyristor valves |
| CN113791092A (en) * | 2021-07-23 | 2021-12-14 | 博众精工科技股份有限公司 | Water distributor for cooling transmission electron microscope and water distribution system thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003043397A1 (en) * | 2001-11-12 | 2003-05-22 | Hitachi, Ltd. | Electronic apparatus |
| US6827131B1 (en) * | 2003-07-21 | 2004-12-07 | Neng Chao Chang | Apparatus of water-cooled heat sink |
| CN2704115Y (en) * | 2004-03-26 | 2005-06-08 | 华孚科技股份有限公司 | Water-cooled radiating device |
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2005
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003043397A1 (en) * | 2001-11-12 | 2003-05-22 | Hitachi, Ltd. | Electronic apparatus |
| US6827131B1 (en) * | 2003-07-21 | 2004-12-07 | Neng Chao Chang | Apparatus of water-cooled heat sink |
| CN2704115Y (en) * | 2004-03-26 | 2005-06-08 | 华孚科技股份有限公司 | Water-cooled radiating device |
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| CN1753173A (en) | 2006-03-29 |
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Owner name: GUANGZHOU GOALAND ENERGY CONSERVATION TECH. CO., L Free format text: FORMER NAME: GUANGZHOU CITY GOALAND WATER TECHNOLOGY CO., LTD. |
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Address after: 510663, Guangzhou hi tech Industrial Development Zone, science, South Road, No. five, cloud 3 Co-patentee after: China Electric Power Research Institute Patentee after: GUANGZHOU GOALAND ENERGY CONSERVATION TECH Co.,Ltd. Address before: 510663, Guangzhou hi tech Industrial Development Zone, science, South Road, No. five, cloud 3 Co-patentee before: China Electric Power Research Institute Patentee before: GUANGZHOU GOALAND ENERGY CONSERVATION TECH Co.,Ltd. |
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Address after: 510663, Guangzhou hi tech Industrial Development Zone, science, South Road, No. five, cloud 3 Co-patentee after: China Electric Power Research Institute Patentee after: GUANGZHOU GOALAND ENERGY CONSERVATION TECH Co.,Ltd. Address before: No. 189 Haizhu science and Technology Park in London and Guangzhou Avenue Road 510300 Guangzhou City Building No. 2 Room 201 Co-patentee before: China Electric Power Research Institute Patentee before: Guangzhou Goaland Energy Conservation Tech Co.,Ltd. |