CN103244397B - Frequency conversion circulating water pump Optimum operating control method - Google Patents
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Abstract
The present invention relates to a kind of frequency conversion circulating water pump Optimum operating control method, the operating procedure of the method is: real-time running data acquisition processing module gathers fired power generating unit real time execution analog data and on-off model, collection result is sent to the real-time computing module of the optimum circulating water flow of single pump operation, two parallel pumps runs the real-time computing module of optimum circulating water flow and frequency conversion circulating water pump method of operation adjustment control module; Adopt the method for progressively superposition, double counting, optimum for basis for estimation with amount of energy saving, calculate the optimum circulating water flow in different frequency variator regulation range, and the circulating water pump running mode data of optimum circulating water flow and correspondence is sent to optimum circulating water flow computing module and circulating water pump optimum operating mode determination mould; Judge the circulating water pump rotating speed under the optimized operation circulating water flow of circulation and the circulating water pump method of operation of correspondence; The input of frequency conversion circulating water pump rotating speed real-time control module is determined; Frequency conversion circulating water pump rotating speed real-time control module completes the energy-conservation automatic control to frequency conversion circulating water pump.The present invention, under the prerequisite ensureing unit operation safety, farthest achieves energy-conservation order.
Description
Technical field
The invention belongs to firepower flood pump electricity Energy Saving Control field, especially a kind of frequency conversion circulating water pump Optimum operating control method.
Background technique
Circulating water pump is one of thermal power generation unit major pant item equipment, and its main task is for the equipment of vapour condenser and other needs coolings provides circulation cooling water.Circulating water pump conventional in fired power generating unit at present has constant speed pump and high/low double speed pump, according to electric load and the circulating water entering water temp of unit, circulating water is passed in and out the foundation that the temperature rise of vapour condenser and condenser terminal difference regulate as circulating water flow, by switching between motor high speed and low speed or adjusting the object that pump discharge valve opening reaches adjust flux, not only Flow-rate adjustment difficulty, and also exist the method for operation unreasonable, switch that frequent rate of fault is high, recirculated cooling water main-piping pressure crosses the problems such as high.Along with the development of High-voltage Frequency Conversion Technology, circulating water pump Frequency Conversion Modification is more and more extensive, frequency conversion circulating water pump is compared with high/low double speed pump with original constant speed pump, and the continuity that can realize circulating water flow regulates, and therefore original controlling method can not be applicable to frequency conversion circulating water pump.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of frequency conversion circulating water pump Optimum operating control 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 operating control method, the hardware system that the method uses comprises: the real-time computing module of the optimum circulating water flow of real-time running data acquisition processing module, single pump operation, two parallel pumps run the real-time computing module of optimum circulating water flow, optimum circulating water flow computing module, circulating water pump optimum operating mode determination module, the adjustment of the frequency conversion circulating water pump method of operation control module, frequency conversion circulating water pump rotating speed real-time control module and operating unit decentralized control system server, and the operating procedure of the method is as follows:
(1) real-time running data acquisition processing module is from operating unit decentralized control system collection of server fired power generating unit real time execution analog data and on-off model, collection result is sent to the real-time computing module of the optimum circulating water flow of single pump operation, two parallel pumps runs the real-time computing module of optimum circulating water flow and frequency conversion circulating water pump method of operation adjustment control module;
(2) run in the real-time computing module of optimum circulating water flow at the real-time computing module of the optimum circulating water flow of single pump operation, two parallel pumps the method adopting progressively superposition, double counting, optimum for basis for estimation with amount of energy saving, calculate the optimum circulating water flow in different frequency variator regulation range respectively, and the circulating water pump running mode data of optimum circulating water flow and correspondence is sent to the calculating of optimum circulating water flow and circulating water pump optimum operating mode determination module;
(3) judge the circulating water pump rotating speed under the optimized operation circulating water flow of circulation and the circulating water pump method of operation of correspondence;
(4) the input of frequency conversion circulating water pump rotating speed real-time control module is determined;
(5) frequency conversion circulating water pump rotating speed real-time control module completes the energy-conservation automatic control to frequency conversion circulating water pump.
And described step (1) middle real time execution analog data and on-off model specifically comprises: unit load, unit vacuum, circulating water pump running state, circulating water pump rotating speed, frequency variator output frequency.
And (2) described step adopts the concrete grammar step of progressively superposition, double counting to comprise:
1. circulating water pump rotating speed adjustable range under single pump operation and two parallel pumps operating mode is set respectively, and the circulating cooling water flow d under calculating different rotating speeds
v;
2. d under different circulating cooling water flow is calculated respectively
vcirculating water pump wasted work amount W
pand the variation delta P to unit vacuum;
3. the variation delta P of unit vacuum is calculated respectively to the influence amount Δ W of generator power;
4. the circulating water pump wasted work amount W under different circulating cooling water flow is calculated respectively
pwith the algebraic sum value ︱ Δ W+W of unit vacuum change to the influence amount Δ W of generator power
p︱, as ︱ Δ W+W
pwhen ︱ is maximum, it is namely the basis for estimation of amount of energy saving optimum.
And the concrete steps of described step judgement circulating water pump rotating speed are (3):
1. optimum circulating water flow computing module and circulating water pump optimum operating mode determination module receive simultaneously and come from the result of calculation that the optimum real-time computing module of circulating water flow of single pump operation and two parallel pumps run the real-time computing module of optimum circulating water flow;
2. corresponding according to optimum circulating water flow respective under single pump operation pattern and two parallel pumps operating mode amount of energy saving, judges the circulating water pump rotating speed under the optimized operation circulating water flow of circulation and the circulating water pump method of operation of correspondence;
3. final result is sent to simultaneously frequency conversion circulating water pump method of operation adjustment control module and frequency conversion circulating water pump rotating speed real-time control module.
And the concrete steps that the input of described step (4) frequency conversion circulating water pump rotating speed real-time control module is determined are:
1. frequency conversion circulating water pump method of operation adjustment control module receives the data coming 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. first judge whether unit previous cycle the working way of pump meets the requirement of optimum operating mode, if do not met, then carry out alarm and send circulating water pump method of operation switching command, manually completed the start stop operation of circulating water pump by unit operation personnel, and circulating water pump real time operation mode signal is sent to frequency conversion circulating water pump rotating speed real-time control module;
If 3. met, then direct circulating water pump real time operation mode signal is sent to frequency conversion circulating water pump rotating speed real-time control module.
Advantage of the present invention and good effect are:
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, two parallel pumps are run the real-time computing module of optimum circulating water flow, 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 frequency conversion circulating water pump rotating speed real-time control module and link together by the present invention, form frequency conversion circulating water pump Optimum operating control system.This system can realize calculating the optimum circulating water flow under different operating conditions, determines frequency conversion circulating water pump optimum operating mode and controlling method, under the prerequisite ensureing unit operation Security, farthest reaches energy-conservation.
Accompanying drawing explanation
Fig. 1 is system architecture schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the present invention is further described; it is emphasized that; embodiment of the present invention is illustrative; instead of it is determinate; therefore the present invention is not limited to the embodiment described in embodiment; every other mode of executions 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 operating control method, as shown in Figure 1, the hardware system that the method uses comprises: real-time running data acquisition processing module, the real-time computing module of the optimum circulating water flow of single pump operation, two parallel pumps runs the real-time computing module of optimum circulating water flow, optimum circulating water flow computing module, circulating water pump optimum operating mode determination module, frequency conversion circulating water pump method of operation adjustment control module, frequency conversion circulating water pump rotating speed real-time control module and operating unit decentralized control system (DCS) server, the operating procedure of the method is as follows:
(1) real-time running data acquisition processing module is from operating unit decentralized control system (DCS) collection of server fired power generating unit real time execution analog data and on-off model, collection result is sent to the real-time computing module of the optimum circulating water flow of single pump operation, two parallel pumps runs the real-time computing module of optimum circulating water flow and frequency conversion circulating water pump method of operation adjustment control module
Wherein, real time execution analog data and on-off model specifically comprise: unit load, unit vacuum, circulating water pump running state, circulating water pump rotating speed, frequency variator output frequency.
(2) the real-time computing module of the optimum circulating water flow of single pump operation, two parallel pumps runs the data acquisition results that the real-time computing module of optimum circulating water flow receives real-time running data acquisition processing module respectively, adopt in each computing module and progressively superpose, the method of double counting, optimum for basis for estimation with amount of energy saving, optimum circulating water flow under calculating single pump operation pattern and two parallel pumps operating mode respectively in different frequency variator regulation range, and the circulating water pump running mode data calculating the optimum circulating water flow of gained and correspondence is sent to the calculating of optimum circulating water flow and circulating water pump optimum operating mode determination module,
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 two parallel pumps operating mode is set respectively, and the circulating cooling water flow d under calculating different rotating speeds
v;
2. d under different circulating cooling water flow is calculated respectively
vcirculating water pump wasted work amount W
pand the variation delta P to unit vacuum;
3. the variation delta P of unit vacuum is calculated respectively to the influence amount Δ W of generator power;
4. the circulating water pump wasted work amount W under different circulating cooling water flow is calculated respectively
pwith the algebraic sum value ︱ Δ W+W of unit vacuum change to the influence amount Δ W of generator power
p︱, as ︱ Δ W+W
pwhen ︱ is maximum, it is namely the basis for estimation of amount of energy saving optimum.
(3) judge the circulating water pump rotating speed under the optimized operation circulating water flow of circulation and the circulating water pump method of operation of correspondence; Its concrete steps are:
1. optimum circulating water flow computing module and circulating water pump optimum operating mode determination module receive simultaneously and come from the result of calculation that the optimum real-time computing module of circulating water flow of single pump operation and two parallel pumps run the real-time computing module of optimum circulating water flow,
2. corresponding according to optimum circulating water flow respective under single pump operation pattern and two parallel pumps operating mode amount of energy saving, judge the circulating water pump rotating speed (frequency variator output frequency) under the optimized operation circulating water flow of circulation and the circulating water pump method of operation of correspondence
3. final result is sent to simultaneously frequency conversion circulating water pump method of operation adjustment control module and frequency conversion circulating water pump rotating speed real-time control module.
(4) the input of frequency conversion circulating water pump rotating speed real-time control module is determined; Its concrete steps are:
1. frequency conversion circulating water pump method of operation adjustment control module receives the data coming 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. first judge whether unit previous cycle the working way of pump meets the requirement of optimum operating mode, if do not met, then carry out alarm and send circulating water pump method of operation switching command, manually completed the start stop operation of circulating water pump by unit operation personnel, and circulating water pump real time operation mode signal is sent to frequency conversion circulating water pump rotating speed real-time control module;
If 3. met, then direct circulating water pump real time operation mode signal is sent to frequency conversion circulating water pump rotating speed real-time control module.
(5) frequency conversion circulating water pump rotating speed real-time control module completes the energy-conservation automatic control to frequency conversion circulating water pump;
Instantiation contrasts
The inventive method obtains application in 2 330MW capacity fired power generating unit frequency conversion circulations, wherein #1 crew qiting two frequency conversion circulating water pump, #2 crew qiting 1 frequency conversion circulating water pump and 1 constant speed pump.After adopting the inventive method, unit year, hours of operation was according to calculating in 6000 hours, can realize the amount of energy saving of 2,650,000 kW.h #1 unit year, can realize the amount of energy saving of 2,400,000 kW.h #2 unit year.
Claims (5)
1. a frequency conversion circulating water pump Optimum operating control method, is characterized in that: the operating procedure of the method is as follows:
(1) real-time running data acquisition processing module is from operating unit decentralized control system collection of server fired power generating unit real time execution analog data and on-off model, collection result is sent to the real-time computing module of the optimum circulating water flow of single pump operation, two parallel pumps runs the real-time computing module of optimum circulating water flow and frequency conversion circulating water pump method of operation adjustment control module;
(2) run in the real-time computing module of optimum circulating water flow at the real-time computing module of the optimum circulating water flow of single pump operation, two parallel pumps the method adopting progressively superposition, double counting, optimum for basis for estimation with amount of energy saving, calculate the optimum circulating water flow in different frequency variator regulation range respectively, and the circulating water pump running mode data of optimum circulating water flow and correspondence is sent to optimum circulating water flow computing module and circulating water pump optimum operating mode determination module;
(3) judge the circulating water pump rotating speed under the optimized operation circulating water flow of circulation and the circulating water pump method of operation of correspondence;
(4) the input of frequency conversion circulating water pump rotating speed real-time control module is determined;
(5) frequency conversion circulating water pump rotating speed real-time control module completes the energy-conservation automatic control to frequency conversion circulating water pump.
2. frequency conversion circulating water pump Optimum operating control method according to claim 1, is characterized in that: described step (1) in real time execution analog data and on-off model specifically comprise: unit load, unit vacuum, circulating water pump running state, circulating water pump rotating speed, frequency variator output frequency.
3. frequency conversion circulating water pump Optimum operating control method according to claim 1, is characterized in that: described step (2) adopt progressively superpose, the concrete grammar step of double counting comprises:
1. circulating water pump rotating speed adjustable range under single pump operation and two parallel pumps operating mode is set respectively, and the circulating cooling water flow d under calculating different rotating speeds
v;
2. d under different circulating cooling water flow is calculated respectively
vcirculating water pump wasted work amount W
pand the variation delta P to unit vacuum;
3. the variation delta P of unit vacuum is calculated respectively to the influence amount Δ W of generator power;
4. the circulating water pump wasted work amount W under different circulating cooling water flow is calculated respectively
pwith the algebraic sum value ︱ Δ W+W of unit vacuum change to the influence amount Δ W of generator power
p︱, as ︱ Δ W+W
pwhen ︱ is maximum, it is namely the basis for estimation of amount of energy saving optimum.
4. frequency conversion circulating water pump Optimum operating control method according to claim 1, is characterized in that: the concrete steps of described step judgement circulating water pump rotating speed are (3):
1. optimum circulating water flow computing module and circulating water pump optimum operating mode determination module receive simultaneously and come from the result of calculation that the optimum real-time computing module of circulating water flow of single pump operation and two parallel pumps run the real-time computing module of optimum circulating water flow;
2. corresponding according to optimum circulating water flow respective under single pump operation pattern and two parallel pumps operating mode amount of energy saving, judges the circulating water pump rotating speed under the optimized operation circulating water flow of circulation and the circulating water pump method of operation of correspondence;
3. final result is sent to simultaneously frequency conversion circulating water pump method of operation adjustment control module and frequency conversion circulating water pump rotating speed real-time control module.
5. frequency conversion circulating water pump Optimum operating control method according to claim 1, is characterized in that: the concrete steps that the input of described step (4) frequency conversion circulating water pump rotating speed real-time control module is determined are:
1. frequency conversion circulating water pump method of operation adjustment control module receives the data coming 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. first judge whether unit previous cycle the working way of pump meets the requirement of optimum operating mode, if do not met, then carry out alarm and send circulating water pump method of operation switching command, manually completed the start stop operation of circulating water pump by unit operation personnel, and circulating water pump real time operation mode signal is sent to frequency conversion circulating water pump rotating speed real-time control module;
If 3. met, then direct circulating water pump real time operation mode signal is sent to frequency conversion circulating water pump rotating speed real-time control module.
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| 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 |
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| 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 |
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| 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 |
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| 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 |
| 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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