CN110617233B - Load distribution control system of natural gas long-distance pipeline compressor unit - Google Patents
Load distribution control system of natural gas long-distance pipeline compressor unit Download PDFInfo
- Publication number
- CN110617233B CN110617233B CN201810629210.5A CN201810629210A CN110617233B CN 110617233 B CN110617233 B CN 110617233B CN 201810629210 A CN201810629210 A CN 201810629210A CN 110617233 B CN110617233 B CN 110617233B
- Authority
- CN
- China
- Prior art keywords
- compressor
- load distribution
- compressor unit
- unit
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/005—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by changing flow path between different stages or between a plurality of compressors; Load distribution between compressors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
- F04D27/0269—Surge control by changing flow path between different stages or between a plurality of compressors; load distribution between compressors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The invention discloses a load distribution control system of a natural gas long-distance pipeline compressor unit, which comprises a first compressor unit, a second compressor unit and a third compressor unit, wherein the output ends of pressure fixed values and pressure measured values of the first compressor unit, the second compressor unit and the third compressor unit are respectively connected with an outlet pressure PID control, and the outlet pressure PID control and a main outlet pressure control are respectively connected in parallel on corresponding selectors; when the total load changes, the control system quickly finishes the control target of loading and unloading within the time allowed by the unit, the efficiency of the unit is not necessarily optimal through the equal distance between the unit operating point and the surge control line, and the optimal load balance is achieved by increasing or decreasing the offset value.
Description
Technical Field
The invention relates to a natural gas distribution control system, in particular to a load distribution control system of a natural gas long-distance pipeline compressor unit.
Background
The compressor used on the west-east gas transmission pipeline, the west two-line and three-line compressor sets have up to seven different combination modes from unit manufacturers and driving modes, the newly added west three-line compressor sets are different from the west two-line compressor sets in unit manufacturers or models at most stations, the rotor performance is different, the current two-line compressor sets are operated completely manually, the load distribution cannot be automatically carried out, the remote control cannot be put into operation, and the compressor sets cannot be automatically started and switched. The basis for manual operation is the experience of the operator when the three-wire set is not added. The mode of manually adjusting the rotating speeds of multiple units and the like to distribute the load is adopted, so that the operating efficiency of the units and the pipe network is reduced, and the control difficulty is increased. Production operation requires that compressors in each station should be capable of arbitrarily combining automatic load distribution, remote control and stable operation according to gas transmission capacity. The manual operation is difficult to realize the complicated regulation, so the load distribution control system is transformed to realize the full-automatic load optimization control, and the unmanned operation is the problem which is urgently needed to be solved in the production. Meanwhile, in the future of pipeline increasing and transmission, the combination of station yard units becomes more and more complex, and a more optimized control scheme and system are needed.
Disclosure of Invention
The invention aims to provide a load distribution control system of a natural gas long-distance pipeline compressor unit, which has the advantages of solving the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the load distribution control system of the compressor set of the natural gas long-distance pipeline comprises a first compressor set, a second compressor set and a third compressor set, wherein the output ends of pressure fixed values and pressure measured values of the first compressor set, the second compressor set and the third compressor set are respectively connected with an outlet pressure PID control, the outlet pressure PID control and a main outlet pressure control are respectively connected in parallel on corresponding selectors, the output ends of the selectors are connected on load distribution, the input ends of the load distribution are communicated through I/O, the load distribution input is also connected with a composite deflection module, and the load distribution outputs the rotation fixed values to a UCPC original control system.
Preferably, the inlet flow, the temperature, the pressure, the humidity and the pressure of the first compressor unit, the second compressor unit and the third compressor unit are all connected to an anti-surge controller to perform a load distribution control mode.
Preferably, the selector controls the operation of a single compressor or the parallel operation of a plurality of compressors, and the operation mode of the single compressor controls the outlet pressure PID control through the isolated operation performance of the commissioning unit to realize the automatic control of the outlet pressure of the compressor; when a plurality of compressors are simultaneously connected in parallel, the output of the PID control of the outlet pressure is distributed to the load of a single compressor, and the load distribution is compared with the load of other parallel units.
Preferably, the load distribution algorithm is performed by comparing the average distance of the load distribution to the anti-surge controller with the distance of each compressor operating point to the control line.
Preferably, the load distribution realizes energy conservation of the combustion engine through data collection and operation condition investigation, mathematical model establishment and optimization method.
Preferably, the load offset variable is introduced by synthesizing the influence factors of the parallel operation efficiency of the multiple compressor sets, and the offset value is increased or decreased by researching the arrangement position of the compressor sets, the models of the compressor sets and the driving mode of the compressor sets when the multiple compressor sets are connected in parallel.
Compared with the prior art, the invention has the beneficial effects that: the load distribution control system of the natural gas long-distance pipeline compressor unit and the load distribution and load balance control technology are characterized in that the total load is distributed to the load of each compressor according to the absolute distance between the operating point of the compressor and a surge control line, and the distance between the operating point of the compressor and the surge control line is ensured to be equal; when the total load changes, the control system quickly finishes the control target of loading and unloading within the time allowed by the unit and realizes no disturbance; when a plurality of units are connected in parallel, the arrangement position of the units, the type of the units, the driving mode of the units and the like have certain influence on the load balance of the units, the distances from the running points of the units to the surge control line are equal, the efficiency of the units is not necessarily optimal, and the optimal load balance is achieved by increasing or reducing the offset value.
Drawings
FIG. 1 is a logical block diagram of an aspect of the present invention;
FIG. 2 is a diagram of a load distribution control scheme of the present invention;
FIG. 3 is a graph of polytropic efficiency of the present invention;
FIG. 4 is a chart of a recording of the operating conditions of the present invention;
FIG. 5 is a graph of the standard performance of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b):
referring to fig. 1, a load distribution control system for a compressor set of a long-distance natural gas pipeline comprises a first compressor set, a second compressor set and a third compressor set, the output ends of the pressure fixed value and the pressure measured value of the first compressor unit, the second compressor unit and the third compressor unit are respectively connected with an outlet pressure PID control, the outlet pressure PID control and the main outlet pressure control are respectively connected in parallel on a corresponding selector, the output end of the selector is connected on a load distribution, the input ends of the load distribution are communicated through I/O, the load distribution input is also connected with a composite deflection module, the load distribution outputs the rotation fixed value to a UCPC original control system, in the air compression station, a selector controls the operation of a single compressor or the parallel operation of a plurality of compressors, and the operation mode of the single compressor controls the PID control of the outlet pressure through the isolated operation performance of the commissioning unit to realize the automatic control of the outlet pressure of the compressor; when a plurality of compressors are simultaneously connected in parallel, the output of the PID control of the outlet pressure is output to the load distribution of a single compressor, the load distribution is compared with the loads of other parallel units, the plurality of compressors are sometimes required to be simultaneously connected in parallel according to the size of the actual production load, the single unit is sometimes required to be independently operated, whether the single unit is operated or the plurality of compressors are in parallel operation is selected through a selection switch connected with a selector on an operation picture, only an operator needs to set a pressure set value when the single unit is independently operated in the operation mode, and the performance control can control the outlet/inlet pressure of the compressor to be stabilized on the set value; when the mode of parallel operation of a plurality of units is selected, the load distribution controller adjusts the load of the unit according to the comparison between the load of a single unit and the loads of other parallel units, and adjusts the load of each unit when the pressure of the control main pipe reaches a set value, so that load balance control is realized.
Referring to fig. 2, the inlet flow, temperature, pressure, humidity and pressure of the first compressor unit, the second compressor unit and the third compressor unit are all connected to the anti-surge controller to perform a load distribution control mode, the load is distributed to the average distance of the anti-surge controller, and compared with the distance between the working point of each compressor and the control line, a load distribution algorithm is performed, and then whether the load of the unit is increased or decreased is determined, and the change rate of the control output is determined according to the distance between the load of the unit and the average load, and the function of simultaneously increasing or decreasing the load of a plurality of units is realized.
The method is characterized in that the method includes the steps of integrating the influence factors of the parallel operation efficiency of multiple compressor sets, introducing load offset variables, researching the arrangement position of the compressor sets, the type of the compressor sets and the driving mode of the compressor sets when the multiple compressor sets are connected in parallel, increasing or decreasing offset values, enabling the multiple compressor sets to achieve load balance through the fact that the distances between the unit operation points and surge control lines are equal, converting mechanical energy into potential energy (improving pressure) of compressed gas by the compressor according to the principle of gas compression, and enabling the efficiency of the compressor to be lower when outlet temperature is higher when the same unit of gas is compressed, namely enabling the compressor to convert more mechanical energy into heat energy.
Referring to fig. 3, the relationship between the efficiency of the compressor and the outlet temperature can be expressed by the following formula:
outlet thermometer algorithm η ═ 1/(k/(k-1)). lg ((p2/p1)/(t2/t1))
Wherein η, the compressor polytropic efficiency T2 compressor outlet temperature; t1 compressor inlet temperature; p2 compressor outlet pressure; p1 compressor inlet pressure; k specific heat ratio; in the formula, it can be seen that when the same unit of gas is compressed, the inlet pressure and the outlet pressure of the two compressors are the same (the basic operation condition of the parallel unit), the efficiency of the compression compressor with high outlet temperature is low, and the compressor with high efficiency needs to do more work when calculating the offset, thereby improving the overall efficiency and realizing energy conservation.
Taking the typical working condition of the pipeline compressor as an example, the relationship between the outlet temperature and the unit polytropic efficiency is calculated:
| setting conditions: | |
| flow rate | 8000Nm3/min |
| Inlet pressure | 5.66Mpa |
| Inlet temperature | 14℃ |
| Outlet pressure | 9.1Mpa |
| Outlet temperature (. degree.C.) | Polytropic efficiency (%) |
| 52 | 82％ |
| 52.5 | 81％ |
| 53 | 80％ |
| 53.5 | 79％ |
| 54 | 78.14％ |
| 54.5 | 77.24％ |
| 55 | 76.36％ |
Referring to FIG. 4, it can be seen that the speed of compressor A is 4461RPM (D-SI-110), the outlet temperature is 52.68 deg.C (A-TI-11), the speed of compressor D is 4501RPM (D-SI-110), and the outlet temperature is 50.98 deg.C (D-TI-11). The models of the four units in the station are the same, but the obvious efficiency is different, and the overall efficiency can be improved by optimizing the bias through load distribution.
The calculation of the actual offset (mass flow per unit in operation) can be guided by the following simplified theoretical formula and corrected in actual operation:
wherein:
t _ AVG _ FLOW is the (target) average value of the mother tube mixed gas temperature;
MFLOW1 is the mass flow of No. 1 unit;
t1 is the outlet temperature of No. 1 unit
MFLOW2 Mass flow for Unit 2
T2 is the outlet temperature of No. 2 unit;
bias versus efficiency relationship: after the load distribution control system is put into use, the relative distances from the operating points of the compressor units participating in load distribution to the surge control line are equal, and load balance is realized. Because the actual efficiency of each compressor has deviation after a certain time of use and the pipe network characteristic, the most obvious characteristic is that the outlet temperature of each compressor is high or low when the gas transmission capacity is equal, a bias algorithm for control optimization is introduced at the moment, the bias quantity is manually or automatically increased, so that the efficient compressor can transmit more gas, the inefficient compressor can transmit less gas, and the overall efficiency of a plurality of compressor sets in operation is improved. Because the rotating speed of the compressor set is adjusted by introducing the offset algorithm, the rotating speed of the driving end of the compressor can be adjusted when the total compression ratio of the parallel connection set is unchanged, the rotating speed of the compressor set with high efficiency is higher, and the gas transmission capacity is larger. For electrically driven compressors, the energy saving effect can be actually displayed and measured.
Referring to fig. 5, for a fuel-driven compressor unit, the actual situation is complex, the vertical axis of the curve is the output shaft power, the horizontal axis is the rotational speed of the output shaft, the heat rate of the gas turbine is related to the output shaft power of the combustion engine and the speed of the output shaft, and when the heat rate curve is 100% of the rated output power and 100% of the rated rotational speed, the heat rate increases along with the decreasing of the rotational speed and the decreasing of the power, that is, the smaller the output power, the higher the heat rate; the lower the speed, the higher the heat rate.
The position heat rate of (1) in the graph is 101% corresponding to 94% of the rated rotation speed and 99% of the rated power; at the position along the curve to (2), a heat rate of 102% corresponds to 89% of the rated speed and 98% of the rated power; the heat rate through (5) was 107%, corresponding to 94% and 75% of the rated speed.
Also, the curves for the isocandela rate are also indicated in the figure: at the position (3), the heat rate is 103% for 97% rated power and 85% rated speed, and at the position (4), the heat rate is 103% for 80% rated power and 90% speed. This gives a difference of 5% in speed in the region of a power output of more than 80%, a difference of 17% in power output, and the heat rate (efficiency) of the combustion engine is the same. That is, when the parallel load distribution offset algorithm is adopted, the compression ratio of the unit in operation is the same, and the high-efficiency compressor (with lower outlet temperature) bears more load (with higher rotating speed), so that the efficiency of the combustion engine is hardly influenced by the reduction of the rotating speed in the high-load area of the combustion engine, and the improvement of the comprehensive efficiency of the parallel unit can directly reduce the requirement of the total required shaft rate, thereby realizing the aim of energy conservation.
When the offset algorithm is used, the outlet temperature of the compressor cannot be used as the basis for regulating the rotating speed, a mathematical model is established according to parameters such as flow, rotating speed, outlet temperature of the compressor, fuel consumption and the like, the corresponding relation among the parameters is found, and a limit value for regulating the rotating speed is obtained according to the offset calculation of the outlet temperature of the compressor under the corresponding relation. Within the limit value range, the rotating speed is adjusted, so that the efficiency of the combustion engine is slightly changed or even not changed. Therefore, the bias adjustment is ensured to be within an acceptable efficiency change range of the gas turbine, the overall efficiency is improved, energy conservation is realized, the load distribution realizes the energy conservation of the gas turbine, and a mathematical model and an optimization method are established through data collection and operation condition investigation;
1. data collection and running condition investigation: standard performance curves for gas turbines operated on site; the operation parameters of the fuel-drive compressor unit comprise fuel supply, air inlet temperature, exhaust gas temperature and flow, inlet and outlet temperature, inlet and outlet pressure, output and the like; the fuel properties of the gas turbine include fuel composition, fuel calorific value, fuel consumption, and the like.
2. Establishing a mathematical model: the fuel-driven compressor unit comprises two devices: gas turbines and compressor trains. The two devices are independent and associated with each other. When the load of the gas turbine is higher than 80% of the design load, the rotating speed of the compressor set is adjusted, the change of the efficiency of the gas turbine is not large, the compressor set can be regarded as two independent devices for modeling, and when the load of the gas turbine is lower than 80% of the design load, the rotating speed of the compressor set is adjusted to have a large influence on the efficiency of the gas turbine, and a model is established in a combined mode. This work involves extensive data analysis and theoretical calculations, which can be performed in conjunction with relatively experienced colleges.
3. The optimization method utilizes: and establishing a good mathematical model, and calculating the performance of the fuel-drive compressor unit in various combination modes. According to the calculation result, simulating that the gas turbine runs under a higher load under different combination conditions, distributing all loads to the compressor unit according to the control parameters of the load distribution control system, and adjusting the load of the compressor through a bias algorithm so as to meet the aims of gas transmission capacity and efficiency improvement. If the higher load of the combustion drive unit can not meet the requirement of gas transmission amount and the number of the compressor units needs to be increased, the total load is distributed to the compressor units in operation according to the control parameters of the load distribution control system, at the moment, the output power of the gas turbine meets the gas transmission amount requirement, but the combustion engine can possibly operate in a lower load area, at the moment, the offset algorithm adjusts the compressor units according to an adjustment strategy in a low load area in a mathematical model, so that the efficiency of the compressor units is improved in the low load area, the efficiency of the gas turbine units is only slightly influenced, and the comprehensive efficiency of the combustion drive compressor units is improved.
To sum up, the load distribution and load balance control technology of the natural gas long-distance pipeline compressor unit distributes the load of each compressor according to the absolute distance between the operating point of the compressor and the surge control line, and ensures that the distances between the operating point of the compressor and the surge control line are equal; when the total load changes, the control system quickly finishes the control target of loading and unloading within the time allowed by the unit and realizes no disturbance; when a plurality of units are connected in parallel, the arrangement position of the units, the type of the units, the driving mode of the units and the like have certain influence on the load balance of the units, the distances from the running points of the units to the surge control line are equal, the efficiency of the units is not necessarily optimal, and the optimal load balance is achieved by increasing or reducing the offset value.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (1)
1. The utility model provides a natural gas long distance pipeline compressor unit load distribution control system, includes first compressor unit, second compressor unit and third compressor unit, its characterized in that: the output ends of the pressure fixed value and the pressure measured value of the first compressor unit, the second compressor unit and the third compressor unit are respectively connected with an outlet pressure PID control, the outlet pressure PID control and the main outlet pressure control are respectively connected in parallel on corresponding selectors, the output ends of the selectors are connected on load distribution, the input ends of the load distribution are communicated through I/O, the input ends of the load distribution are also connected with a composite deflection module, and the load distribution outputs the rotation fixed value to a UCPC original control system; the inlet flow, the inlet temperature, the inlet pressure, the outlet temperature and the outlet pressure of the first compressor unit, the second compressor unit and the third compressor unit are all connected to an anti-surge controller to carry out a load distribution control mode; the selector controls the operation of a single compressor or the parallel operation of a plurality of compressors, and the operation mode of the single compressor controls the PID control of the outlet pressure through the isolated operation performance of the commissioning unit to realize the automatic control of the outlet pressure of the compressor; when a plurality of compressors are simultaneously connected in parallel, the output of the PID control of the outlet pressure is output to the load distribution of a single compressor, and the load distribution is compared with the loads of other parallel units; the average distance between the load and the anti-surge controller is distributed, and the average distance is compared with the distance between the working point of each compressor and the control line respectively to perform a load distribution algorithm; the load distribution realizes energy conservation of the gas turbine, and a mathematical model and an optimization method are established through data collection and running condition investigation; the method is characterized in that the influence factors of the parallel operation efficiency of the multiple compressor sets are integrated, load offset variables are introduced, the arrangement positions of the compressor sets, the models of the compressor sets and the driving modes of the compressor sets are researched when the multiple compressor sets are connected in parallel, and offset values are increased or decreased.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810629210.5A CN110617233B (en) | 2018-06-19 | 2018-06-19 | Load distribution control system of natural gas long-distance pipeline compressor unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810629210.5A CN110617233B (en) | 2018-06-19 | 2018-06-19 | Load distribution control system of natural gas long-distance pipeline compressor unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110617233A CN110617233A (en) | 2019-12-27 |
| CN110617233B true CN110617233B (en) | 2021-03-30 |
Family
ID=68920210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810629210.5A Active CN110617233B (en) | 2018-06-19 | 2018-06-19 | Load distribution control system of natural gas long-distance pipeline compressor unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110617233B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112983878A (en) * | 2021-03-16 | 2021-06-18 | 沈阳永恒自动化设备有限公司 | Compressor performance controller |
| CN113391656B (en) * | 2021-06-07 | 2022-06-28 | 国家石油天然气管网集团有限公司西气东输分公司 | Intelligent increase and decrease control method for compressor unit |
| CN113739437B (en) * | 2021-09-13 | 2023-02-10 | 西安陕鼓动力股份有限公司 | Dynamic load distribution control method for parallel operation of multiple compressors |
| CN114087222A (en) * | 2021-11-18 | 2022-02-25 | 国家石油天然气管网集团有限公司 | Intelligent load regulation control method based on parallel connection of multiple compressor sets |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5743715A (en) * | 1995-10-20 | 1998-04-28 | Compressor Controls Corporation | Method and apparatus for load balancing among multiple compressors |
| US6701223B1 (en) * | 2000-09-11 | 2004-03-02 | Advantica, Inc. | Method and apparatus for determining optimal control settings of a pipeline |
| CN102392812A (en) * | 2011-06-10 | 2012-03-28 | 辽宁华兴森威科技发展有限公司 | Surge control system of compressor unit |
| CN103256213A (en) * | 2012-02-15 | 2013-08-21 | 株式会社日立工业设备技术 | Compressor system and running control method thereof |
-
2018
- 2018-06-19 CN CN201810629210.5A patent/CN110617233B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5743715A (en) * | 1995-10-20 | 1998-04-28 | Compressor Controls Corporation | Method and apparatus for load balancing among multiple compressors |
| US6701223B1 (en) * | 2000-09-11 | 2004-03-02 | Advantica, Inc. | Method and apparatus for determining optimal control settings of a pipeline |
| CN102392812A (en) * | 2011-06-10 | 2012-03-28 | 辽宁华兴森威科技发展有限公司 | Surge control system of compressor unit |
| CN103256213A (en) * | 2012-02-15 | 2013-08-21 | 株式会社日立工业设备技术 | Compressor system and running control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110617233A (en) | 2019-12-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110617233B (en) | Load distribution control system of natural gas long-distance pipeline compressor unit | |
| EP2823168B1 (en) | Method to control gas turbine engine power output | |
| US9140184B2 (en) | Supercharged combined cycle system with air flow bypass to HRSG and fan | |
| CN106251079B (en) | Industrial circulating cooling water system optimization method based on annual average cooling energy efficiency ratio and optimized operation | |
| CN105006846A (en) | Station level active power optimization method of wind power station | |
| CN104329281A (en) | Variable frequency energy-saving system for movable blade adjustable type induced draft fan | |
| CN114396714B (en) | System and method for automatically controlling and operating system starting number | |
| CN105402845A (en) | Method for adjusting air conditioner system | |
| CN111059030A (en) | Air compressor three-stage cooling system and method based on dynamic independent control of cooling water quantity | |
| CN111663972A (en) | Arrange high-efficient heating system of secondary reheat unit in | |
| CN111810984B (en) | Optimization control method for capacity-increasing transformation of primary air fan adaptive steam turbine | |
| CN103397918B (en) | The back pressure type small turbine drive blower fan system of frequency conversion generator speed governing and method | |
| CN111188688B (en) | Thermoelectric ratio adjusting method for distributed energy system of gas engine | |
| CN201680530U (en) | Primary pump variable flow system with evaporative water chiller | |
| CN203879743U (en) | Natural gas supercharging system of combustible gas-steam combined cycle unit | |
| CN110985218A (en) | Method and system for adjusting pressure of supercharger of gas turbine | |
| CN216077243U (en) | Novel steam extraction control device of steam extraction type steam turbine | |
| CN114087222A (en) | Intelligent load regulation control method based on parallel connection of multiple compressor sets | |
| CN109441634A (en) | A kind of gas turbine and method of operation | |
| CN211737408U (en) | Air compressor tertiary cooling system based on cooling water quantity independent control | |
| CN101832622B (en) | Method for realizing continuous regulation of primary pump variable flow system by using evaporative water cooling machine set | |
| CN110397614A (en) | A kind of airflow pressure automatic control system of fired power generating unit | |
| CN203189299U (en) | Frequency-conversion stepless speed-regulation energy-saving system of air conditioning fan | |
| CN107401499A (en) | Compressed-air energy storage pressure regulation and expanding machine working system | |
| CN112468022B (en) | Frequency conversion energy-saving system for multiple groups of generator sets |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 830000 No. 99, West fifth lane, Tianjin North Road, Urumqi high tech Industrial Development Zone (new urban area), Xinjiang Uygur Autonomous Region Patentee after: State pipe network group West Pipeline Co.,Ltd. Address before: No.99, Xiwu lane, Tianjin North Road, Urumqi high tech Industrial Development Zone, Xinjiang Uygur Autonomous Region, 830011 Patentee before: PETROCHINA WEST PIPELINE Co. |