CN109426659A - The danger zone FLNG electricity instrument equipment intrinsic safety cable fast design method - Google Patents
The danger zone FLNG electricity instrument equipment intrinsic safety cable fast design method Download PDFInfo
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- CN109426659A CN109426659A CN201710740129.XA CN201710740129A CN109426659A CN 109426659 A CN109426659 A CN 109426659A CN 201710740129 A CN201710740129 A CN 201710740129A CN 109426659 A CN109426659 A CN 109426659A
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- 230000005611 electricity Effects 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000013461 design Methods 0.000 title claims abstract description 8
- 239000003990 capacitor Substances 0.000 claims abstract description 13
- 238000012795 verification Methods 0.000 abstract description 8
- 238000012937 correction Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000012141 concentrate Substances 0.000 abstract 1
- 241000196324 Embryophyta Species 0.000 description 3
- 238000010187 selection method Methods 0.000 description 3
- 238000012550 audit Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F40/00—Handling natural language data
- G06F40/10—Text processing
- G06F40/166—Editing, e.g. inserting or deleting
- G06F40/177—Editing, e.g. inserting or deleting of tables; using ruled lines
- G06F40/18—Editing, e.g. inserting or deleting of tables; using ruled lines of spreadsheets
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
- G06Q50/06—Energy or water supply
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses the danger zone FLNG electricity instrument equipment intrinsic safety cable fast design methods, this method calculates the carrying current calculation of intrinsically safe circuit cable, voltage drop, maximum allowable capacitor and inductor calculates and verification concentrates in a table, type selecting quickly can be carried out to intrinsic safety cable by existing input parameter, have the characteristics that quick, comprehensive, intuitive, form maintenance is simple, simplicity is audited in check and correction.
Description
Technical field
The present invention relates to a kind of intrinsic safety cable selection methods more particularly to the danger zone FLNG electricity instrument equipment intrinsic safety cable to select
Type method belongs to ship and ocean engineering field.
Background technique
The type selecting of shipbuilding and ocean engineering intrinsic safety cable is generally according to IEC60079-25 explosive atmosphere essential safety system
System normative content, first selectes a kind of cable specification, then carries out calculating verification, meet the requirements, select, undesirable, selects
It selects next specification and then repeats above-mentioned work.
Feature: a kind of selection method of conventional intrinsic safety cable first selectes the principle verified afterwards.
Advantage: there is mature numerical procedure.
Disadvantage: the need of cable type selecting verify three standards: current-carrying capacity, voltage drop, maximum allowable capacitor and inductor, due to intrinsic safety
The current-carrying capacity of cable and the usual very little of voltage drop are generally not included in calculating verification, and intrinsically safe circuit calculated description usually only includes
Maximum allowable capacitor and inductor part, calculated description further include the parameter verification of equipment, only list part relevant to cable here.
Since conventional intrinsically safe circuit calculated description is not comprehensive to the type selection calculation of intrinsic safety cable, and current-carrying capacity and voltage drop meter
The case where cable of intrinsically safe circuit is also usually ignored in calculation, and intrinsically safe circuit calculated description cannot reflect current-carrying capacity and voltage drop, Er Qie
Occurs intrinsically safe circuit voltage drop larger the case where causing instrument can not work normally in practical engineering project.Some projects design
Personnel calculate intrinsic safety cable voltage drop, but need to inquire two parts of calculation documents when subsequent modification and check and correction audit cable, give
Subsequent modification and check and correction examination bring inconvenience to a certain extent.
Summary of the invention
The technical problem to be solved by the present invention is to propose that a kind of danger zone FLNG electricity instrument equipment intrinsic safety cable quickly selects
Type method, can be by intrinsically safe circuit cable set of computations in a table, and can pass through whole parameters quickly to intrinsic safety
Cable carries out type selecting, has the characteristics that quick, comprehensive, intuitive, form maintenance is simple, simplicity is audited in check and correction.
In order to solve the above-mentioned technical problem, the danger zone FLNG electricity instrument equipment intrinsic safety cable fast design side of the invention
Method includes the following steps: to make a Microsoft Excel, is divided into the part sheet1 and sheet2；Wherein it is with cable in sheet1
Main object, setting include at least cable number, circuit voltage rating, circuit rated current, initial plant, termination device, every
From grid data, local instrumented data, maximum allowable cable length, actual cable length, cable voltage drop, cable specification and conclusion this
A little data, wherein cable number, circuit voltage rating, circuit rated current, initial plant, termination device, isolated gate data,
Local instrumented data, actual cable length, cable specification are input data, maximum allowable cable length, cable voltage drop and conclusion
For output data；Sheet2 is arranged cable manufacturer and provides cable data, including cable specification, and electricity corresponding with cable specification
Appearance, inductance, resistance and current-carrying capacity parameter；Cable specification is selected, by right in input data corresponding in sheet1 and sheet2
Cable data is answered to obtain maximum allowable cable length, cable voltage drop in sheet 1；To current-carrying capacity, voltage drop and capacitor and inductor into
Row verification, when 3 check results meet simultaneously, conclusion is OK in sheet1；The sheet2 when there is any check results to be unsatisfactory for
Middle conclusion is Not OK.
In above-mentioned technical proposal, the maximum allowable cable length Dc, Dc=Min (Dc1, Dc2), Dc1=(Co-Ci)/
C, Dc2=(Lo-Li)/L；Wherein, Co is to allow capacitor, input capacitance in the instrumented data of the local Ci in isolated gate data, and Lo is
Allow inductance in isolated gate data, inductance is inputted in the instrumented data of the local Li, C is capacitance parameter in cable data, and L is cable ginseng
Inductance parameters in number.
In above-mentioned technical proposal, the cable voltage drop Vd=2x I x L x R x L: wherein I is circuit rated current, V
It is resistance in cable data for circuit voltage rating, R.
Selection method of the invention can by existing input parameter quickly to intrinsic safety cable carry out type selecting, have quickly,
Comprehensively, intuitively, the feature that form maintenance is simple, check and correction audit is easy.
Detailed description of the invention
Fig. 1 is the sheet1 in the table in embodiment；
Fig. 2 is the sheet2 in the table in embodiment.
Specific embodiment
Referring to Fig. 1, the data of sheet1:
1. cable number: cable unique identification, corresponding table B column.
2. circuit voltage rating V: electrical basic parameter, corresponding table C column
3. circuit rated current I: electrical basic parameter, corresponding table D column.
4. initial plant: intrinsic information, corresponding table E column.
5. termination device: intrinsic information, corresponding table F column.
6. isolated gate data: the intrinsic parameter of selected isolated gate, including isolated gate allow capacitor Co, allow inductance Lo, this
A little data can be found from isolated gate and local manufacturers data, corresponding table H column.
7. local instrumented data: the intrinsic parameter of selected local instrument, including local instrument input capacitance Ci, input inductance
Li.These data can be found from local manufacturers data, corresponding table J column.
8. maximum allowable cable length Dc: according to maximum allowable cable capacitance Cc, maximum allowable cable inductance Lc, input electricity
Hold Ci, input inductance Li, cable capacitance C, cable inductance L to calculate separately and obtain, takes wherein minimum value, corresponding table K column.According to
Following formula:
Dc1=(Co-Ci)/C
Dc2=(Lo-Li)/L
Dc=Min (Dc1, Dc2)
9. actual cable length L: the intrinsic parameter of cable, corresponding table L column.
10. cable voltage drop: being calculated and obtained according to electric current I, voltage V, cable resistance R: Vd=2x I x Lx R x L
(DC loop voltage drop calculating), corresponding table M column.
11. cable specification: 0.75,1,1.5,2.5 in select one kind, corresponding table N column.
12. conclusion: being verified according to current-carrying capacity, loop current value, which is less than cable, allows current-carrying capacity；Voltage drop verification, voltage drop
Less than 10%；Capacitor and inductor verification, actual cable length, which is less than, allows cable length；It is when 3 check results meet simultaneously
OK is Not OK when any check results are unsatisfactory for, corresponding table O column.
The cable data that Sheet2 cable manufacturer provides:
1. capacitor, in the 3rd row of table 2.
2. inductance, in the 4th row of table 2.
3. resistance, in the 5th row of table 2.
4. current-carrying capacity, in the 6th row of table 2.
The formula calculated automatically for Fig. 1 and Fig. 2 is as follows:
With the 1st cable data, in the 2nd, 3 behavior example of table:
K2 cell, maximum allowable cable length=(H2-J2)/INDEX (Sheet2！C$3:F$3,1,MATCH(N2,
Sheet2！C $ 2:F $ 2,0)), first the N2 cell (cable for being equal to table 1 is searched in the 2nd row (cable specification) in table 2
Specification), then take its capacitance to carry out operation.
M2 cell, cable voltage drop=2*D2*L2*INDEX (Sheet2！C$5:F$5,1,MATCH(N2,Sheet2！C$
2:F 2,0))/100, with taking the resistance value of cable to carry out operation with above-mentioned function.
O2 cell, conclusion=IF (D2 < INDEX (Sheet2！C$6:F$6,1,MATCH(N2,Sheet2！C$2:F$2,
), 0) IF (MIN (K2:K3)>L2, IF (M2<0.1, " OK ", " voltage drop Not OK "), " capacitor and inductor Not OK "), " current-carrying capacity
Not OK "), allow these three check results of cable maximum length to judge cable using current-carrying capacity of cable, voltage drop, capacitor and inductor
Whether type selecting meets the requirements, and only meets there are three check results simultaneously and just determines that cable type selecting meets the requirements, when undesirable
When can provide three verification in which condition it is undesirable.
Claims (3)
- The danger zone 1.FLNG electricity instrument equipment intrinsic safety cable fast design method, it is characterised in that: include the following steps, production one A Microsoft Excel is divided into the part sheet1 and sheet2；Wherein using cable as main object in sheet1, setting is included at least Cable number, circuit voltage rating, circuit rated current, initial plant, termination device, isolated gate data, local instrumented data, Maximum allowable cable length, actual cable length, cable voltage drop, cable specification and conclusion these data, wherein cable number, Circuit voltage rating, circuit rated current, initial plant, termination device, isolated gate data, local instrumented data, actual cable Length, cable specification are input data, and maximum allowable cable length, cable voltage drop and conclusion are output data；Sheet2 setting Cable manufacturer provides cable data, including cable specification, and capacitor corresponding with cable specification, inductance, resistance and current-carrying capacity Parameter；Cable specification is selected, obtains sheet1 by corresponding to cable data in input data corresponding in sheet1 and sheet2 In maximum allowable cable length, cable voltage drop；Current-carrying capacity, voltage drop and capacitor and inductor are verified, when 3 check results are same When conclusion is OK in sheet1 when meeting；When there is any check results to be unsatisfactory for, conclusion is Not OK in sheet2.
- 2. the danger zone FLNG electricity instrument equipment intrinsic safety cable fast design method as described in claim 1, it is characterised in that: institute State maximum allowable cable length Dc, Dc=Min (Dc1, Dc2), Dc1=(Co-Ci)/C, Dc2=(Lo-Li)/L；Wherein, Co is Allow capacitor, input capacitance in the instrumented data of the local Ci in isolated gate data, Lo is to allow inductance in isolated gate data, and Li is local Inductance is inputted in instrumented data, C is capacitance parameter in cable data, and L is inductance parameters in cable data.
- 3. the danger zone FLNG electricity instrument equipment intrinsic safety cable fast design method as claimed in claim 1 or 2, feature exist In: the cable voltage drop Vd=2x I x L x R x L: wherein I is circuit rated current, V is circuit voltage rating, R is electricity Resistance in cable parameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710740129.XA CN109426659A (en) | 2017-08-25 | 2017-08-25 | The danger zone FLNG electricity instrument equipment intrinsic safety cable fast design method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710740129.XA CN109426659A (en) | 2017-08-25 | 2017-08-25 | The danger zone FLNG electricity instrument equipment intrinsic safety cable fast design method |
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| CN109426659A true CN109426659A (en) | 2019-03-05 |
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| CN201710740129.XA Pending CN109426659A (en) | 2017-08-25 | 2017-08-25 | The danger zone FLNG electricity instrument equipment intrinsic safety cable fast design method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112221995A (en) * | 2020-09-22 | 2021-01-15 | 国网安徽省电力有限公司 | Big data-based material model selection checking system for transmission and transformation distribution engineering equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050092514A1 (en) * | 2003-10-31 | 2005-05-05 | Robert Kenny | Cable utilizing varying lay length mechanisms to minimize alien crosstalk |
| CN102073721A (en) * | 2011-01-10 | 2011-05-25 | 南通航运职业技术学院 | Method for checking shipborne massive goods binding scheme |
| CN102496940A (en) * | 2011-12-01 | 2012-06-13 | 广东电网公司广州供电局 | Method and device for cable current-carrying capacity reactive compensation |
-
2017
- 2017-08-25 CN CN201710740129.XA patent/CN109426659A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050092514A1 (en) * | 2003-10-31 | 2005-05-05 | Robert Kenny | Cable utilizing varying lay length mechanisms to minimize alien crosstalk |
| CN102073721A (en) * | 2011-01-10 | 2011-05-25 | 南通航运职业技术学院 | Method for checking shipborne massive goods binding scheme |
| CN102496940A (en) * | 2011-12-01 | 2012-06-13 | 广东电网公司广州供电局 | Method and device for cable current-carrying capacity reactive compensation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112221995A (en) * | 2020-09-22 | 2021-01-15 | 国网安徽省电力有限公司 | Big data-based material model selection checking system for transmission and transformation distribution engineering equipment |
| CN112221995B (en) * | 2020-09-22 | 2021-12-17 | 国网安徽省电力有限公司 | Big data-based material model selection checking system for transmission and transformation distribution engineering equipment |
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Application publication date: 20190305 |
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