CN101922613A - Fuel gas automatic current limiting control method - Google Patents
Fuel gas automatic current limiting control method Download PDFInfo
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- CN101922613A CN101922613A CN2009100530670A CN200910053067A CN101922613A CN 101922613 A CN101922613 A CN 101922613A CN 2009100530670 A CN2009100530670 A CN 2009100530670A CN 200910053067 A CN200910053067 A CN 200910053067A CN 101922613 A CN101922613 A CN 101922613A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000002737 fuel gas Substances 0.000 title claims abstract description 10
- 239000007789 gas Substances 0.000 description 16
- 230000001105 regulatory effect Effects 0.000 description 11
- 239000000567 combustion gas Substances 0.000 description 9
- 238000011161 development Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The invention relates to a fuel gas automatic current limiting control method. The control method includes that: load control is not carried out, electrically operated valve aperture is fully opened, and a pressure regulator is used for controlling flow and outlet pressure; flow is constant, the load control flow is set as 30%, load control is started, the action states of two electrically operated valves and the pressure regulator are observed, and outlet flow, outlet pressure, electrically operated valve front and back pressures and electrically operated valve aperture are recorded; the outlet flow is reduced, the action states of the two electrically operated valves and the pressure regulator are observed, and outlet flow, outlet pressure, electrically operated valve front and back pressures and electrically operated valve aperture are recorded; the outlet flow is increased, the action states of the two electrically operated valves and the pressure regulator are observed, and outlet flow, outlet pressure, electrically operated valve front and back pressures and electrically operated valve aperture are recorded; the outlet flow is increased again, the starting state of a secondary pressure regulator and the switching state of the electrically operated valve are observed; and resetting operation and the action state of the valve are confirmed. The invention has the advantages of safety and reliability.
Description
Technical field
The present invention relates to automatic current limit control method, relate in particular to fuel gas automatic current limiting control method.
Background technique
Combustion gas mesolow voltage regulating station is the key node of gas ductwork, not only bearing direct task to residential quarter and the large user of enterprises and institutions air feed, also bearing simultaneously the task of equilibrium region supply gas pressure, control band gas supply flow, the dispatching center implements air feed by voltage regulating station to regional air feed and regulates control.
Raising day by day along with socioeconomic fast development and living standards of the people, the Shanghai Natural gas use amount continues high, under the prerequisite of the safe operation of guaranteeing existing subscriber and gas ductwork, regulate, control the supply of rock gas rationally and effectively, become the task of top priority.
At present, voltage regulating station of gas transmission and distribution company does not all possess flow control function, in the face of the national energy-saving and emission-reduction policy and the strategy of sustainable development, the large user of enterprises and institutions gas supply is carried out the research of automatic flow control and the demand that technological development has become a reality, and the present technique case just is being based on the demand and is proposing.
Summary of the invention
Purpose of the present invention is exactly in order to overcome the defective that above-mentioned prior art exists, a kind of high-efficiency reliable fuel gas automatic current limiting control method to be provided.
Purpose of the present invention can be achieved through the following technical solutions: fuel gas automatic current limiting control method is characterized in that this controlling method comprises:
(1) control of not loading, mortor operated valve aperture standard-sized sheet carries out the control of flow and outlet pressure by pressure governor;
(2) constant flow, the control flow rate of loading is set to 30%, starts load control, observes the operating state of 2 mortor operated valves and pressure governor, pressure and mortor operated valve aperture data before and after record rate of discharge, outlet pressure, the mortor operated valve;
(3) reduce rate of discharge, observe the operating state of 2 mortor operated valves and pressure governor, pressure and mortor operated valve aperture data before and after record rate of discharge, outlet pressure, the mortor operated valve;
(4) flow of increasing export is observed the operating state of 2 mortor operated valves and pressure governor, pressure and mortor operated valve aperture data before and after record rate of discharge, outlet pressure, the mortor operated valve;
(5) continue the flow of increasing export, observe starting state and the mortor operated valve switching state of paying pressure governor;
(6) confirm reset operation valve event state.
Compared with prior art, advantage of the present invention comprises:
(1) combustion gas Current limited Control technology is from setting up the needs of combustion gas Current limited Control, the imbalance between supply and demand of balance rock gas, select the large user of enterprises and institutions combustion gas voltage regulating station as the current limliting monitoring link, the classification that the industrial and commercial rich and influential family of emphasis usefulness gas the is implemented certain limit air feed of limiting the quantity of, compare with traditional combustion gas voltage regulating station, strengthen the controllability of gas supply, met the national energy policy in period and the demand for development of enterprise at present and in the future;
(2) the present invention meets the current limliting operating conditions requirement of combustion gas voltage regulating station, and is safe and reliable, can not constitute the normal operation of combustion gas voltage regulating station to hinder, and design concept is succinct, rationally, test complete tightly, function meets the actual conditions demand;
(3) the present invention is by detecting the voltage regulating station rate of discharge, the aperture of control inlet valve, and the purpose that reaches the throttling of combustion gas voltage regulating station, current limliting is achieved success, for the large user of enterprises and institutions terminal overall control and network security balance air feed provide solution.
Description of drawings
Fig. 1 is the Current limited Control flow chart of fuel gas automatic current limiting control method of the present invention;
But Fig. 2 is the Current limited Control voltage regulating station process pipelines schematic representation of fuel gas automatic current limiting control gear of the present invention;
Fig. 3 is the Current limited Control PLC allocation plan of fuel gas automatic current limiting control gear of the present invention.
Embodiment
The present invention will be further described below in conjunction with specific embodiment.
The basic fundamental thought of automatic flow control is: the import dish valve to combustion gas zone voltage regulating station carries out open degree control, be applicable to that mainly flow is the control (as: CW Customer Terminal Equipment is many gas fired boilers, air-conditioning) of graded, the gas flow, pressure limit of guaranteeing controlled terminal are in setting range, to reach the purpose of planning with gas, rationally to use gas, make regional gas flow have controllability.The current limliting setting value can be passed through dispatching center's (mandate) and once set download, also can revise midway, and the automatic current limiting control gear is an important control node under the SCADA system.
1. the control procedure of pressure governor current limliting
In order to ensure its safe operation, pressure governor generally all is designed to 2+1 (2 tunnel automatic voltage regulators in parallel add 1 tunnel manual bypass), 2+0 (2 tunnel automatic voltage regulators in parallel do not have bypass) form.The operating conditions of No. 2 automatic voltage regulators is one the road commonly used, and another road is standby, and when the outlet pressure when commonly used a tunnel was lower than setting value 20%, standby pressure governor was opened automatically, to guarantee normal supply gas pressure.
In order to implement Current limited Control, V1 and V2 are changed into can be by the electric valve of PLC control operation.
In Fig. 2, P1 and P2 are the real-time pressures of main and auxiliary pressure governor pipeline, and P0 is an inlet pressure, and P is an outlet pressure, and L is a rate of discharge.
V1, V2 standard-sized sheet under the normal flow rate state are determined primary/secondary pressure governor (pressure governor of work/not working) by pressure reduction before and after V1, the V2.When entering big flow Current limited Control state, system detects the outlet flow value in real time.
During the current limliting operation, first via valve controls to the aperture that sets in advance, the second road valve is controlled minimum current limliting position (300m3/h flow), as super flow operation, outlet pressure descends, No. the second pressure governor starts automatically, and be equivalent to allow to flow through flow this moment is the minimum given flow 300m3/h of current limliting flow+the second road, and system prompt is reported to the police.Through certain hour, still super given flow operation, then first via valve reduces current limliting shelves automatically, reaches current limitation effect; If flow is in given range, then outlet pressure can rise to normal range (NR), and this moment, No. the second pressure governor cut out automatically, and first via valve automatically restores to and sets the current limliting shelves simultaneously.
By control, realize the purpose of pressure governor current limliting to V1, V2 aperture.
2. Current limited Control flow process framework, as shown in Figure 1.
3.PLC procedure auto-control load control procedure
A, the control of not loading, mortor operated valve aperture standard-sized sheet carries out the control of flow and outlet pressure by pressure governor;
B, constant flow, the control flow rate of loading is set to 30%, starts load control, observes the operating state of 2 mortor operated valves and pressure governor, pressure and mortor operated valve aperture data before and after record rate of discharge, outlet pressure, the mortor operated valve;
C, reduce rate of discharge, observe the operating state of 2 mortor operated valves and pressure governor, record rate of discharge, outlet pressure, mortor operated valve front and back pressure and mortor operated valve aperture data;
D, the flow of increasing export are observed the operating state of 2 mortor operated valves and pressure governor, pressure and mortor operated valve aperture data before and after record rate of discharge, outlet pressure, the mortor operated valve;
E, continue the flow of increasing export, observe starting state and the mortor operated valve switching state of paying pressure governor;
F, affirmation reset operation valve event state.
4. dispatching terminal automatic current limiting operating platform
Current-limiting apparatus is sent to the dispatching terminal computer by the Mobitex satellite communication network with on-the-spot current limliting floor data, accepts the current limliting parameter setting that dispatching terminal is assigned simultaneously.
Claims (1)
1. fuel gas automatic current limiting control method is characterized in that, this controlling method comprises:
(1) control of not loading, mortor operated valve aperture standard-sized sheet carries out the control of flow and outlet pressure by pressure governor;
(2) constant flow, the control flow rate of loading is set to 30%, starts load control, observes the operating state of 2 mortor operated valves and pressure governor, pressure and mortor operated valve aperture data before and after record rate of discharge, outlet pressure, the mortor operated valve;
(3) reduce rate of discharge, observe the operating state of 2 mortor operated valves and pressure governor, pressure and mortor operated valve aperture data before and after record rate of discharge, outlet pressure, the mortor operated valve;
(4) flow of increasing export is observed the operating state of 2 mortor operated valves and pressure governor, pressure and mortor operated valve aperture data before and after record rate of discharge, outlet pressure, the mortor operated valve;
(5) continue the flow of increasing export, observe starting state and the mortor operated valve switching state of paying pressure governor;
(6) confirm reset operation valve event state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910053067.0A CN101922613B (en) | 2009-06-15 | 2009-06-15 | Fuel gas automatic current limiting control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910053067.0A CN101922613B (en) | 2009-06-15 | 2009-06-15 | Fuel gas automatic current limiting control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101922613A true CN101922613A (en) | 2010-12-22 |
| CN101922613B CN101922613B (en) | 2014-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910053067.0A Expired - Fee Related CN101922613B (en) | 2009-06-15 | 2009-06-15 | Fuel gas automatic current limiting control method |
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| Country | Link |
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| CN (1) | CN101922613B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537665A (en) * | 2011-12-23 | 2012-07-04 | 上海飞奥燃气设备有限公司 | Device and method for regulating outlet pressure of indirect effect type gas pressure regulator along with clock |
| CN105955182A (en) * | 2016-05-16 | 2016-09-21 | 上海航天能源股份有限公司 | Remote pressure regulating system and method used for gas pressure regulating station |
| CN106369283A (en) * | 2016-10-13 | 2017-02-01 | 上海航天能源股份有限公司 | Pipeline flow control system and method |
| CN107289328A (en) * | 2016-03-31 | 2017-10-24 | 中国石油天然气集团公司 | A kind of method and apparatus for controlling natural gas pressure regulating sled |
| CN107504370A (en) * | 2017-08-04 | 2017-12-22 | 中核兰州铀浓缩有限公司 | A kind of Process Control System for centrifuging pipeline between tandem in uranium enrichment system |
| CN109681781A (en) * | 2018-12-29 | 2019-04-26 | 北京市燃气集团有限责任公司 | A kind of gas ductwork terminal adjusting device operation method and device |
| CN112926868A (en) * | 2021-03-11 | 2021-06-08 | 郑州畅威物联网科技有限公司 | Method and device for evaluating load state of voltage regulating device and readable storage medium |
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| EP0968461A1 (en) * | 1997-03-22 | 2000-01-05 | BG plc | Pressure regulating system |
| CN1560711A (en) * | 2004-03-03 | 2005-01-05 | 陕西科技大学 | A kind of electric valve control method and its control device |
| CN2901094Y (en) * | 2006-03-17 | 2007-05-16 | 王轩 | Gas leakage protector |
| CN101382236A (en) * | 2008-09-28 | 2009-03-11 | 张永华 | Fluid multi-pipeline collecting transmission and distribution control system and control method |
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2009
- 2009-06-15 CN CN200910053067.0A patent/CN101922613B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5598863A (en) * | 1994-08-11 | 1997-02-04 | Kruto; Donald | Fluid flow volume scheduling control system |
| EP0968461A1 (en) * | 1997-03-22 | 2000-01-05 | BG plc | Pressure regulating system |
| CN1560711A (en) * | 2004-03-03 | 2005-01-05 | 陕西科技大学 | A kind of electric valve control method and its control device |
| CN2901094Y (en) * | 2006-03-17 | 2007-05-16 | 王轩 | Gas leakage protector |
| CN101382236A (en) * | 2008-09-28 | 2009-03-11 | 张永华 | Fluid multi-pipeline collecting transmission and distribution control system and control method |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537665A (en) * | 2011-12-23 | 2012-07-04 | 上海飞奥燃气设备有限公司 | Device and method for regulating outlet pressure of indirect effect type gas pressure regulator along with clock |
| CN102537665B (en) * | 2011-12-23 | 2014-08-13 | 上海飞奥燃气设备有限公司 | Device and method for regulating outlet pressure of indirect effect type gas pressure regulator along with clock |
| CN107289328A (en) * | 2016-03-31 | 2017-10-24 | 中国石油天然气集团公司 | A kind of method and apparatus for controlling natural gas pressure regulating sled |
| CN107289328B (en) * | 2016-03-31 | 2019-04-09 | 中国石油天然气集团公司 | A kind of method and apparatus of control natural gas pressure regulating sled |
| CN105955182A (en) * | 2016-05-16 | 2016-09-21 | 上海航天能源股份有限公司 | Remote pressure regulating system and method used for gas pressure regulating station |
| CN106369283A (en) * | 2016-10-13 | 2017-02-01 | 上海航天能源股份有限公司 | Pipeline flow control system and method |
| CN107504370A (en) * | 2017-08-04 | 2017-12-22 | 中核兰州铀浓缩有限公司 | A kind of Process Control System for centrifuging pipeline between tandem in uranium enrichment system |
| CN107504370B (en) * | 2017-08-04 | 2020-02-18 | 中核兰州铀浓缩有限公司 | Process control system of pipeline between cascade stages in centrifugal uranium enrichment system |
| CN109681781A (en) * | 2018-12-29 | 2019-04-26 | 北京市燃气集团有限责任公司 | A kind of gas ductwork terminal adjusting device operation method and device |
| CN112926868A (en) * | 2021-03-11 | 2021-06-08 | 郑州畅威物联网科技有限公司 | Method and device for evaluating load state of voltage regulating device and readable storage medium |
| CN112926868B (en) * | 2021-03-11 | 2024-04-09 | 郑州畅威物联网科技有限公司 | Voltage regulating equipment load state evaluation method, equipment and readable storage medium |
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| Publication number | Publication date |
|---|---|
| CN101922613B (en) | 2014-04-02 |
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