CN103244397A - Optimal operation control method for variable-frequency circulating water pump - Google Patents
Optimal operation control method for variable-frequency circulating water pump Download PDFInfo
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Abstract
The invention relates to an optimal operation control method for a variable-frequency circulating water pump. The operational steps of the optimal operation control method include operating a data collection processing module to collect real-time operational analog quantity data and switching value signals of a thermal power generating unit in real time; sending collected results to an optimal circulating water flow real-time calculating module of single-pump operation, an optimal circulating water flow real-time calculating module of double-pump operation in parallel connection and an adjusting and controlling module of variable-frequency circulating water pump operation mode; calculating optimal circulating water flow in different frequency converter adjusting ranges according to the criterion of optimal energy saving amount by adopting methods of step-by-step superposition and repetitive calculation, and sending the optimal circulating water flow and corresponding circulating water pump operation mode data to an optimal circulating water flow calculating module and a circulating pump optimal operation mode determining module; judging the optimal operation circulating water flow of a circulating system and corresponding circulating water pump revolving speeds in circulating water pump operation modes; determining input of a revolving speed real-time control module of the variable-frequency circulating water pump; and completing automatic energy saving control on the variable-frequency circulating water pump by a revolving speed real-time control module of the variable-frequency circulating water pump. The purpose of energy saving is achieved to the utmost on the premise that operation safety of the unit is guaranteed.
Description
Technical field
The invention belongs to the firepower pump electricity Energy Saving Control field that floods, especially a kind of frequency conversion circulating water pump optimum operation controlling method.
Background technique
Circulating water pump is one of thermal power generation unit major pant item equipment, and its main task is to provide circulation cooling water for vapour condenser and other equipment that need cool off.Circulating water pump commonly used has constant speed pump and high/low double speed pump in fired power generating unit at present, electric load and circulating water entering water temp according to unit, circulating water is passed in and out the temperature rise of vapour condenser and the foundation that condenser terminal difference is regulated as circulating water flow, reach the purpose of regulating flow by switching between motor high speed and the low speed or adjusting the pump discharge valve opening, Flow-rate adjustment difficulty not only, and exist the method for operation unreasonable, switch frequent rate of fault height, the recirculated cooling water main-piping pressure is crossed problems such as height.Development along with the high-voltage frequency-changing technology, the circulating water pump frequency conversion is transformed more and more widely, the frequency conversion circulating water pump is compared with high/low double speed pump with original constant speed pump, can realize that the continuity of circulating water flow is regulated, and therefore original controlling method can not be applicable to the frequency conversion circulating water pump.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of frequency conversion circulating water pump optimum operation controlling method is provided.
The present invention solves its technical problem and takes following technological scheme to realize:
A kind of frequency conversion circulating water pump optimum operation controlling method, the employed hardware system of this method comprises: real-time running data acquisition processing module, the real-time computing module of the optimum circulating water flow of single pump operation, the real-time computing module of the optimum circulating water flow of double pump parallel running, optimum circulating water flow computing module, circulating water pump optimum operating mode determination module, the frequency conversion circulating water pump method of operation are adjusted control module, the real-time control module of frequency conversion circulating water pump rotating speed and operation unit decentralized control system server, and the operating procedure of this method is as follows:
⑴ real-time running data acquisition processing module is sent to the real-time computing module of the optimum circulating water flow of single pump operation, the optimum real-time computing module of circulating water flow of double pump parallel running and the frequency conversion circulating water pump method of operation with collection result and adjusts control module from operation unit decentralized control system collection of server fired power generating unit real time execution analog data and switching value signal;
⑵ adopt the progressively method of stack, double counting in the real-time computing module of the optimum circulating water flow of single pump operation, the real-time computing module of the optimum circulating water flow of double pump parallel running, be basis for estimation with the amount of energy saving optimum, calculate the optimum circulating water flow in the different frequency variator regulation ranges respectively, and with optimum circulating water flow and corresponding circulating water pump running mode data is sent to optimum circulating water flow computing module and the circulating water pump optimum operating mode is determined mould;
⑶ the circulating water pump rotating speed under the optimized operation circulating water flow of judgement circulation and the corresponding circulating water pump method of operation;
⑷ the input of the real-time control module of frequency conversion circulating water pump rotating speed is determined;
⑸ the real-time control module of frequency conversion circulating water pump rotating speed is finished the energy-conservation automatic control to the frequency conversion circulating water pump.
And real time execution analog data and switching value signal specifically comprise among the described step ⑴: unit load, unit vacuum, circulating water pump running state, circulating water pump rotating speed, frequency variator output frequency.
And described step ⑵ adopts the concrete grammar step of progressively stack, double counting to comprise:
1. circulating water pump rotating speed adjustable range under single pump operation and the double pump parallel running pattern is set respectively, and calculates the circulating cooling water flow d under the different rotating speeds
v
2. calculate d under the different circulating cooling water flows respectively
vCirculating water pump wasted work amount W
pAnd to the variation delta P of unit vacuum;
3. calculate the amount of the influence Δ W of the generator power of variation delta P of unit vacuum respectively;
4. calculate the circulating water pump wasted work amount W under the different circulating cooling water flows respectively
pWith the algebraic sum value ︱ Δ W+W of unit vacuum variation to the amount of the influence Δ W of generator power
p︱, ︱ Δ W+W when its value is maximum
p︱
Max, namely be the basis for estimation of amount of energy saving optimum.
And the concrete steps of the judgement circulating water pump rotating speed of described step ⑶ are:
1. optimum circulating water flow computing module and circulating water pump optimum operating mode determination module receive the result of calculation that comes from the optimum real-time computing module of circulating water flow of single pump operation and the real-time computing module of the optimum circulating water flow of double pump parallel running simultaneously;
2. according to separately the amount of energy saving of optimum circulating water flow correspondence under single pump operation pattern and the double pump parallel running pattern, judge the optimized operation circulating water flow of circulation and the circulating water pump rotating speed under the corresponding circulating water pump method of operation;
3. final result is sent to simultaneously the frequency conversion circulating water pump method of operation and adjusts control module and the real-time control module of frequency conversion circulating water pump rotating speed.
And the concrete steps that the input of the real-time control module of described step ⑷ frequency conversion circulating water pump rotating speed is determined are:
1. the frequency conversion circulating water pump method of operation is adjusted control module and is received the data that come from real-time running data acquisition processing module, optimum circulating water flow computing module and circulating water pump optimum operating mode determination module simultaneously;
2. judge at first whether the current circulating water pump method of operation of unit satisfies the requirement of optimum operating mode, if do not satisfy, then carry out alarm and send circulating water pump method of operation switching command, manually finish the start stop operation of circulating water pump by the unit operation personnel, and circulating water pump real time operation mode signal is sent to the real-time control module of frequency conversion circulating water pump rotating speed;
If 3. satisfy, then directly circulating water pump real time operation mode signal be sent to the real-time control module of frequency conversion circulating water pump rotating speed.
Advantage of the present invention and good effect are:
The present invention links together fired power generating unit real-time running data acquisition processing module, the real-time computing module of the optimum circulating water flow of single pump operation, the real-time computing module of the optimum circulating water flow of double pump parallel running, the calculating of optimum circulating water flow and circulating water pump optimum operating mode determination module, frequency conversion circulating water pump method of operation adjustment control module and the real-time control module of frequency conversion circulating water pump rotating speed, constitutes frequency conversion circulating water pump optimum operation control system.This system can realize calculating the optimum circulating water flow under the different operating conditionss, determines frequency conversion circulating water pump optimum operating mode and controlling method, under the prerequisite that guarantees the unit operation Security, farthest reaches energy-conservation.
Description of drawings
Fig. 1 is system architecture schematic representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the invention is further described; it is emphasized that; embodiment of the present invention is illustrative; rather than it is determinate; therefore the present invention is not limited to the embodiment described in the embodiment; every other mode of executions that drawn by those skilled in the art's technological scheme according to the present invention belong to the scope of protection of the invention equally.
A kind of frequency conversion circulating water pump optimum operation controlling method, as shown in Figure 1, the employed hardware system of this method comprises: the real-time running data acquisition processing module, the real-time computing module of the optimum circulating water flow of single pump operation, the real-time computing module of the optimum circulating water flow of double pump parallel running, optimum circulating water flow computing module, circulating water pump optimum operating mode determination module, the frequency conversion circulating water pump method of operation is adjusted control module, the real-time control module of frequency conversion circulating water pump rotating speed and operation unit decentralized control system (DCS) server, the operating procedure of this method is as follows:
⑴ real-time running data acquisition processing module is from operation unit decentralized control system (DCS) collection of server fired power generating unit real time execution analog data and switching value signal, collection result is sent to the real-time computing module of the optimum circulating water flow of single pump operation, the optimum real-time computing module of circulating water flow of double pump parallel running and the frequency conversion circulating water pump method of operation adjusts control module
Wherein, real time execution analog data and switching value signal specifically comprise: unit load, unit vacuum, circulating water pump running state, circulating water pump rotating speed, frequency variator output frequency.
⑵ the real-time computing module of the optimum circulating water flow of single pump operation, the real-time computing module of the optimum circulating water flow of double pump parallel running receives the data capture result of real-time running data acquisition processing module respectively, in each computing module, adopt progressively stack, the method of double counting, be basis for estimation with the amount of energy saving optimum, calculate the optimum circulating water flow in the different frequency variator regulation ranges under single pump operation pattern and the double pump parallel running pattern respectively, and the circulating water pump running mode data that will calculate the optimum circulating water flow of gained and correspondence is sent to optimum circulating water flow computing module and the circulating water pump optimum operating mode is determined mould
Wherein, described employing progressively superposes, the concrete grammar step of double counting comprises:
1. circulating water pump rotating speed adjustable range under single pump operation and the double pump parallel running pattern is set respectively, and calculates the circulating cooling water flow d under the different rotating speeds
v
2. calculate d under the different circulating cooling water flows respectively
vCirculating water pump wasted work amount W
pAnd to the variation delta P of unit vacuum;
3. calculate the amount of the influence Δ W of the generator power of variation delta P of unit vacuum respectively;
4. calculate the circulating water pump wasted work amount W under the different circulating cooling water flows respectively
pWith the algebraic sum value ︱ Δ W+W of unit vacuum variation to the amount of the influence Δ W of generator power
p︱, ︱ Δ W+W when its value is maximum
p︱
Max, namely be the basis for estimation of amount of energy saving optimum.
⑶ the circulating water pump rotating speed under the optimized operation circulating water flow of judgement circulation and the corresponding circulating water pump method of operation; Its concrete steps are:
1. optimum circulating water flow computing module and circulating water pump optimum operating mode determination module receive the result of calculation that comes from the optimum real-time computing module of circulating water flow of single pump operation and the real-time computing module of the optimum circulating water flow of double pump parallel running simultaneously,
2. according to separately the amount of energy saving of optimum circulating water flow correspondence under single pump operation pattern and the double pump parallel running pattern, circulating water pump rotating speed (frequency variator output frequency) under the optimized operation circulating water flow of judgement circulation and the corresponding circulating water pump method of operation
3. final result is sent to simultaneously the frequency conversion circulating water pump method of operation and adjusts control module and the real-time control module of frequency conversion circulating water pump rotating speed.
⑷ the input of the real-time control module of frequency conversion circulating water pump rotating speed is determined; Its concrete steps are:
1. the frequency conversion circulating water pump method of operation is adjusted control module and is received the data that come from real-time running data acquisition processing module, optimum circulating water flow computing module and circulating water pump optimum operating mode determination module simultaneously;
2. judge at first whether the current circulating water pump method of operation of unit satisfies the requirement of optimum operating mode, if do not satisfy, then carry out alarm and send circulating water pump method of operation switching command, manually finish the start stop operation of circulating water pump by the unit operation personnel, and circulating water pump real time operation mode signal is sent to the real-time control module of frequency conversion circulating water pump rotating speed;
If 3. satisfy, then directly circulating water pump real time operation mode signal be sent to the real-time control module of frequency conversion circulating water pump rotating speed.
⑸ the real-time control module of frequency conversion circulating water pump rotating speed is finished the energy-conservation automatic control to the frequency conversion circulating water pump;
The instantiation contrast
The inventive method has obtained application 2 330MW capacity fired power generating unit frequency conversion circulations, and wherein the #1 unit disposes two frequency conversion circulating water pump, #2 unit 1 frequency conversion circulating water pump of configuration and 1 constant speed pump.After adopting the inventive method, unit year hours of operation calculated according to 6000 hours, #1 unit year can be realized the amount of energy saving of 2,650,000 kW.h, #2 unit year can be realized the amount of energy saving of 2,400,000 kW.h.
Claims (5)
1. frequency conversion circulating water pump optimum operation controlling method, it is characterized in that: the operating procedure of this method is as follows:
⑴ real-time running data acquisition processing module is sent to the real-time computing module of the optimum circulating water flow of single pump operation, the optimum real-time computing module of circulating water flow of double pump parallel running and the frequency conversion circulating water pump method of operation with collection result and adjusts control module from operation unit decentralized control system collection of server fired power generating unit real time execution analog data and switching value signal;
⑵ adopt the progressively method of stack, double counting in the real-time computing module of the optimum circulating water flow of single pump operation, the real-time computing module of the optimum circulating water flow of double pump parallel running, be basis for estimation with the amount of energy saving optimum, calculate the optimum circulating water flow in the different frequency variator regulation ranges respectively, and with optimum circulating water flow and corresponding circulating water pump running mode data is sent to optimum circulating water flow computing module and the circulating water pump optimum operating mode is determined mould;
⑶ the circulating water pump rotating speed under the optimized operation circulating water flow of judgement circulation and the corresponding circulating water pump method of operation;
⑷ the input of the real-time control module of frequency conversion circulating water pump rotating speed is determined;
⑸ the real-time control module of frequency conversion circulating water pump rotating speed is finished the energy-conservation automatic control to the frequency conversion circulating water pump.
2. according to the described frequency conversion circulating water pump of claim 1 optimum operation controlling method, it is characterized in that: real time execution analog data and switching value signal specifically comprise among the described step ⑴: unit load, unit vacuum, circulating water pump running state, circulating water pump rotating speed, frequency variator output frequency.
3. according to the described frequency conversion circulating water pump of claim 1 optimum operation controlling method, it is characterized in that: described step ⑵ adopts the concrete grammar step of progressively stack, double counting to comprise:
1. circulating water pump rotating speed adjustable range under single pump operation and the double pump parallel running pattern is set respectively, and calculates the circulating cooling water flow d under the different rotating speeds
v
2. calculate d under the different circulating cooling water flows respectively
vCirculating water pump wasted work amount W
pAnd to the variation delta P of unit vacuum;
3. calculate the amount of the influence Δ W of the generator power of variation delta P of unit vacuum respectively;
4. calculate the circulating water pump wasted work amount W under the different circulating cooling water flows respectively
pWith the algebraic sum value ︱ Δ W+W of unit vacuum variation to the amount of the influence Δ W of generator power
p︱, ︱ Δ W+W when its value is maximum
p︱
Max, namely be the basis for estimation of amount of energy saving optimum.
4. according to the described frequency conversion circulating water pump of claim 1 optimum operation controlling method, it is characterized in that: the concrete steps of the judgement circulating water pump rotating speed of described step ⑶ are:
1. optimum circulating water flow computing module and circulating water pump optimum operating mode determination module receive the result of calculation that comes from the optimum real-time computing module of circulating water flow of single pump operation and the real-time computing module of the optimum circulating water flow of double pump parallel running simultaneously;
2. according to separately the amount of energy saving of optimum circulating water flow correspondence under single pump operation pattern and the double pump parallel running pattern, judge the optimized operation circulating water flow of circulation and the circulating water pump rotating speed under the corresponding circulating water pump method of operation;
3. final result is sent to simultaneously the frequency conversion circulating water pump method of operation and adjusts control module and the real-time control module of frequency conversion circulating water pump rotating speed.
5. according to the described frequency conversion circulating water pump of claim 1 optimum operation controlling method, it is characterized in that: the concrete steps that the input of the real-time control module of described step ⑷ frequency conversion circulating water pump rotating speed is determined are:
1. the frequency conversion circulating water pump method of operation is adjusted control module and is received the data that come from real-time running data acquisition processing module, optimum circulating water flow computing module and circulating water pump optimum operating mode determination module simultaneously;
2. judge at first whether the current circulating water pump method of operation of unit satisfies the requirement of optimum operating mode, if do not satisfy, then carry out alarm and send circulating water pump method of operation switching command, manually finish the start stop operation of circulating water pump by the unit operation personnel, and circulating water pump real time operation mode signal is sent to the real-time control module of frequency conversion circulating water pump rotating speed;
If 3. satisfy, then directly circulating water pump real time operation mode signal be sent to the real-time control module of frequency conversion circulating water pump rotating speed.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104863841A (en) * | 2015-04-30 | 2015-08-26 | 国家电网公司 | Method for online efficiency monitoring of circulating water pump in thermal power plant |
| CN106202826A (en) * | 2016-07-29 | 2016-12-07 | 上海交通大学 | The double back pressure cold end system double speed pump circulating water flow optimization method of a kind of fired power generating unit |
| CN106347100A (en) * | 2016-09-29 | 2017-01-25 | 浙江吉利控股集团有限公司 | Cooling system for generator for stroke increasing hybrid vehicle |
| CN108087259A (en) * | 2016-11-22 | 2018-05-29 | 许继集团有限公司 | A kind of computational methods of frequency conversion water circulating pump power consumption |
| CN110185604A (en) * | 2019-05-16 | 2019-08-30 | 山东国电发电工程有限公司 | A kind of circulating water pump in thermal power plant motor frequency change control method and system |
| CN111123863A (en) * | 2019-12-16 | 2020-05-08 | 南京合创工程设计有限公司 | Optimal energy-saving control method and system for circulating water system of large caprolactam device |
| CN112096602A (en) * | 2020-09-29 | 2020-12-18 | 国电华北电力有限公司廊坊热电厂 | Method for automatically controlling frequency conversion circulating water pump set of wet cooling steam turbine power generation set |
| CN113432370A (en) * | 2021-07-05 | 2021-09-24 | 蔚海建 | Circulating water system with balanced supply and demand under different loads and water supply temperatures and control method |
| CN113513746A (en) * | 2021-04-26 | 2021-10-19 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | Method for determining optimized operation mode of closed circulating water system of thermal power plant |
| CN113759995A (en) * | 2021-09-07 | 2021-12-07 | 广东鑫钻节能科技股份有限公司 | Joint control method and system for vacuum station |
| CN114810568A (en) * | 2022-04-11 | 2022-07-29 | 安徽卧龙泵阀股份有限公司 | System and method for controlling running distance of delivery pump |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57115679A (en) * | 1981-01-09 | 1982-07-19 | Toshiba Corp | Adjusting device of degree of vacuum in condenser |
| CN201297863Y (en) * | 2008-09-26 | 2009-08-26 | 福建东讯工业电气自动化有限公司 | Energy-saving device for circulating water system of thermal power plant |
-
2013
- 2013-05-09 CN CN201310169401.5A patent/CN103244397B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57115679A (en) * | 1981-01-09 | 1982-07-19 | Toshiba Corp | Adjusting device of degree of vacuum in condenser |
| CN201297863Y (en) * | 2008-09-26 | 2009-08-26 | 福建东讯工业电气自动化有限公司 | Energy-saving device for circulating water system of thermal power plant |
Non-Patent Citations (2)
| Title |
|---|
| 徐甫荣: "《高压变频调速技术应用实践》", 28 February 2007, 中国电力出版社 * |
| 杨春霞: "凝汽式机组循环水泵的优化运行方式分析", 《江苏电机工程》 * |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104863841A (en) * | 2015-04-30 | 2015-08-26 | 国家电网公司 | Method for online efficiency monitoring of circulating water pump in thermal power plant |
| CN106202826A (en) * | 2016-07-29 | 2016-12-07 | 上海交通大学 | The double back pressure cold end system double speed pump circulating water flow optimization method of a kind of fired power generating unit |
| CN106202826B (en) * | 2016-07-29 | 2020-06-12 | 上海交通大学 | Method for optimizing circulating water flow of double-speed pump of double-backpressure cold-end system of thermal power generating unit |
| CN106347100A (en) * | 2016-09-29 | 2017-01-25 | 浙江吉利控股集团有限公司 | Cooling system for generator for stroke increasing hybrid vehicle |
| CN108087259A (en) * | 2016-11-22 | 2018-05-29 | 许继集团有限公司 | A kind of computational methods of frequency conversion water circulating pump power consumption |
| CN110185604A (en) * | 2019-05-16 | 2019-08-30 | 山东国电发电工程有限公司 | A kind of circulating water pump in thermal power plant motor frequency change control method and system |
| CN110185604B (en) * | 2019-05-16 | 2020-05-08 | 国家能源(山东)工程技术有限公司 | Variable frequency control method and system for circulating water pump motor of thermal power plant |
| CN111123863A (en) * | 2019-12-16 | 2020-05-08 | 南京合创工程设计有限公司 | Optimal energy-saving control method and system for circulating water system of large caprolactam device |
| CN112096602A (en) * | 2020-09-29 | 2020-12-18 | 国电华北电力有限公司廊坊热电厂 | Method for automatically controlling frequency conversion circulating water pump set of wet cooling steam turbine power generation set |
| CN112096602B (en) * | 2020-09-29 | 2022-09-06 | 国电华北电力有限公司廊坊热电厂 | Method for automatically controlling frequency conversion circulating water pump set of wet cooling steam turbine power generation set |
| CN113513746A (en) * | 2021-04-26 | 2021-10-19 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | Method for determining optimized operation mode of closed circulating water system of thermal power plant |
| CN113513746B (en) * | 2021-04-26 | 2023-02-28 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | Method for determining optimized operation mode of closed circulating water system of thermal power plant |
| CN113432370A (en) * | 2021-07-05 | 2021-09-24 | 蔚海建 | Circulating water system with balanced supply and demand under different loads and water supply temperatures and control method |
| CN113759995A (en) * | 2021-09-07 | 2021-12-07 | 广东鑫钻节能科技股份有限公司 | Joint control method and system for vacuum station |
| CN113759995B (en) * | 2021-09-07 | 2022-05-03 | 广东鑫钻节能科技股份有限公司 | Joint control method and system for vacuum station |
| CN114810568A (en) * | 2022-04-11 | 2022-07-29 | 安徽卧龙泵阀股份有限公司 | System and method for controlling running distance of delivery pump |
| CN114810568B (en) * | 2022-04-11 | 2024-05-14 | 安徽卧龙泵阀股份有限公司 | System and method for controlling running distance of conveying pump |
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