CN117823998A - Intelligent combined control method for pipeline pump and electric regulating valve of multi-unit heat exchange station - Google Patents
Intelligent combined control method for pipeline pump and electric regulating valve of multi-unit heat exchange station Download PDFInfo
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Abstract
The invention discloses an intelligent combined control method for a pipeline pump and an electric regulating valve of a multi-unit heat exchange station, which belongs to the field of intelligent control of heating systems and comprises the following steps: s1, acquiring actual average temperature of a unit in each branch pipeline, opening of an electric regulating valve and frequency of a network pipeline pump; s2, adjusting the opening of the electric regulating valve based on the actual uniform temperature of the units in each branch pipeline; s3, adjusting the frequency of a network pipeline pump based on the maximum opening value of the adjusted electric regulating valve; s4, based on the frequency of the pipeline pump of the next net after adjustment, intelligent joint control of the pipeline pump of the multi-unit heat exchange station and the electric regulating valve is completed. The pipeline pump frequency does not need to be manually adjusted, the full-automatic control is realized, the missed adjustment is avoided, the manual workload is reduced, the pipeline pump frequency is more intelligent and convenient than the manual experience pump adjustment, and the pipeline pump frequency is better than the experience value.
Description
Technical Field
The invention belongs to the field of intelligent control of heating systems, and particularly relates to an intelligent combined control method of a pipeline pump and an electric regulating valve of a multi-unit heat exchange station.
Background
In the method 1, each partition automatically adjusts the opening of the electric regulating valve according to the requirement of the secondary side temperature, and automatically adjusts according to the requirement of the user when the secondary side temperature reaches the requirement of the user; the pipeline pump of the one-network pump automatically tracks by taking a given constant differential pressure as a target, and adapts to the differential pressure change caused by opening or closing of each partition valve. The disadvantage of this method is that the accuracy requirement of the pressure sensor is too high, and the feedback of such small pressure changes is not achieved by the general sensor at all, so that the pipeline pump cannot realize tracking control.
In the method 2, after each partition is reasonably distributed, the opening degree of each electric regulating valve is fixed, and the frequency of a net pump is regulated by taking the unit secondary temperature with the largest opening degree as a target. This approach is theoretically possible: after the opening of each partition electric regulating valve is fixed, the flow distribution is fixed in proportion in theory, the pipeline pump is regulated according to the target of the secondary side temperature of one unit, and in theory, other partitions are also changed in equal proportion. However, in the actual testing process, each unit is affected by various manual valves, filters and the like, and the temperature change is often not in an equal proportion relationship, so that the opening degree of each valve is often required to be adjusted, and the distribution of fixed proportion is difficult to realize.
For both methods, contradictory working conditions of small opening degree of the electric regulating valve and large frequency of the pipeline pump occur, and the power consumption is large and the service life of equipment is also adversely affected.
The existing multi-unit pump and valve control heat exchange station regulation and control technology generally regulates and controls the valve opening through target temperature, reduces the pipeline pump frequency until the valve opening of the least favorable unit reaches 100%, keeps all the electric regulating valve openings of the heat exchange station unchanged, and then only increases or reduces the pipeline pump frequency to realize the target value of the secondary network temperature of a certain unit (assumed to be the A unit). The method can only ensure that the temperature of the secondary side of the A unit is matched with the target, and after the frequency of the pipeline pump is greatly adjusted, the deviation between other units and the temperature target is larger.
The existing multi-unit pump and valve control heat exchange station regulation and control technology also has the advantages that the electric regulating valve regulation and control automatically controls the two-network uniform temperature through methods such as PID or fuzzy control and the like. Because the pipeline pump regulation and control logic of the multi-unit pump and valve control heat exchange station is often contradictory with the opening degree of each unit valve, the pipeline pump is not automated, human intervention is needed, and when the opening degree of the electric regulating valve can not meet the temperature, the frequency of the pipeline pump is manually regulated.
Disclosure of Invention
Aiming at the defects in the prior art, the intelligent combined control method of the multi-unit heat exchange station pipeline pump and the electric regulating valve provided by the invention solves the problems that the pipeline pump is difficult to control due to different lifting and lowering requirements of the multi-unit pipeline pump.
In order to achieve the aim of the invention, the invention adopts the following technical scheme: the intelligent combined control method of the multi-unit heat exchange station pipeline pump and the electric regulating valve is applied to an intelligent combined control system of the multi-unit heat exchange station pipeline pump and the electric regulating valve, and the system comprises a one-network pipeline pump, a two-network circulating pump group, an electric regulating valve group and a PLC control module which is respectively in communication connection with the one-network pipeline pump, the two-network circulating pump group and the electric regulating valve group;
the two-network circulating pump unit comprises a plurality of two-network circulating pumps, the electric regulating valve group comprises a plurality of electric regulating valves, the one-network pipeline pump is arranged in a main pipeline, the main pipeline is connected with a plurality of branch pipelines, and each branch pipeline is provided with a heat exchanger, a two-network circulating pump and an electric regulating valve;
the PLC control module is also in communication connection with the intelligent heat supply upper computer;
the method comprises the following steps:
s1, acquiring actual average temperature of a unit in each branch pipeline, opening of an electric regulating valve and frequency of a network pipeline pump;
s2, adjusting the opening of the electric regulating valve based on the actual uniform temperature of the units in each branch pipeline;
s3, adjusting the frequency of a network pipeline pump based on the maximum opening value of the adjusted electric regulating valve;
s4, based on the frequency of the pipeline pump of the next net after adjustment, intelligent joint control of the pipeline pump of the multi-unit heat exchange station and the electric regulating valve is completed.
Further: in S2, the method for adjusting the opening of the electric control valve includes the following steps:
s21, setting a target uniform temperature, and calculating deviation between the target uniform temperature and the actual uniform temperature of the unit;
s22, judging whether the deviation is larger than 0, if so, entering S23, and if not, entering S24;
s23, increasing the opening of the electric regulating valve according to the deviation;
and S24, reducing the opening degree of the electric regulating valve according to the deviation.
Further: the step S23 is specifically as follows:
if the deviation is smaller than 0.2, the opening of the electric regulating valve is kept unchanged;
if the deviation is within the range of [0.2, 0.5), the opening degree of the electric control valve is increased by 0.5 opening degrees;
if the deviation is within the range of [0.5, 1), the opening degree of the electric control valve is increased by 0.8 opening degrees;
if the deviation is within the range of [1, 2), the opening degree of the electric regulating valve is increased by 1.5 opening degrees;
if the deviation is within the range of [2,3 ], the opening degree of the electric control valve is increased by 3 opening degrees;
if the deviation is greater than 3, the opening degree of the electric control valve is increased by 5 opening degrees.
Further: the step S24 specifically comprises the following steps:
if the absolute value of the deviation is smaller than 0.2, the opening of the electric regulating valve is kept unchanged;
if the absolute value of the deviation is within the range of [0.2, 0.5), the opening degree of the electric regulating valve is reduced by 0.5 opening degrees;
if the absolute value of the deviation is within the range of [0.5, 1), the opening of the electric regulating valve is reduced by 0.8 opening;
if the absolute value of the deviation is in the range of [1,2 ], the opening degree of the electric regulating valve is reduced by 1.5 opening degrees;
if the absolute value of the deviation is in the range of [2,3 ], the opening degree of the electric regulating valve is reduced by 3 opening degrees;
if the absolute value of the deviation is greater than 3, the opening degree of the electric control valve is reduced by 5 opening degrees.
Further: the step S3 comprises the following substeps:
s31, acquiring the opening of the electric regulating valve after adjustment, and taking the maximum value of the opening of the electric regulating valve after adjustment as the opening of the electric regulating valve of the most unfavorable unit;
s32, judging whether the opening of the electric regulating valve of the most adverse unit is smaller than 90, if so, calculating the opening deviation of the first valve, and regulating the frequency of a network pipeline pump; if not, entering S33;
s33, judging whether the opening of the electric regulating valve of the most adverse unit is in the range of [90,95], if so, keeping the frequency of the pipeline pump of the network unchanged; if not, entering S34;
s34, calculating the opening deviation of the second valve, and adjusting the frequency of the pipeline pump.
Further: in the S32, a first valve opening deviation is calculatedThe expression of (2) is specifically:
in the method, in the process of the invention,the opening degree of the electric regulating valve is the most unfavorable unit;
the method for adjusting the frequency of the network pipeline pump comprises the following steps:
if the opening deviation of the first valve is smaller than 1, the frequency of the pipeline pump of the network is kept unchanged;
if the opening deviation of the first valve is in the range of [1,2 ], the frequency of the pipeline pump of the network is reduced by 0.01Hz;
if the opening deviation of the first valve is in the range of [2,3 ], the frequency of the pipeline pump of the network is reduced by 0.02Hz;
if the opening deviation of the first valve is in the range of [3,4 ], the frequency of the pipeline pump of the network is reduced by 0.03Hz;
if the opening deviation of the first valve is in the range of [4, 5], the frequency of the pipeline pump of the network is reduced by 0.04Hz;
if the deviation of the opening degree of the first valve is larger than 5, the frequency of the pipeline pump of the network is reduced by 0.05Hz.
Further toGround: in the step S34, a second valve opening deviation is calculatedThe expression of (2) is specifically:
the method for adjusting the frequency of the network pipeline pump comprises the following steps:
if the opening deviation of the second valve is smaller than 1, the frequency of the pipeline pump of the network is kept unchanged;
if the second valve opening deviation is in the range of [1,2 ], the frequency of the pipeline pump of the network is increased by 0.01Hz;
if the second valve opening deviation is in the range of [2,3 ], the frequency of the one-net pipeline pump is increased by 0.02Hz;
if the second valve opening deviation is in the range of [3,4 ], the frequency of the one-net pipeline pump is increased by 0.03Hz;
if the second valve opening deviation is in the range of [4, 5], the frequency of the one-net pipeline pump is increased by 0.04Hz;
if the deviation of the opening degree of the second valve is larger than 5, the frequency of the pipeline pump with one net is increased by 0.05Hz.
The beneficial effects of the invention are as follows:
(1) The invention provides an intelligent combined control method for a pipeline pump and an electric regulating valve of a multi-unit heat exchange station, when the opening degree of the electric regulating valve of the least favorable unit is not in the range of 90-95, the pipeline pump is regulated, and when the deviation between the actual average temperature and the target average temperature is still larger, the opening degree of the electric regulating valve is regulated, the frequency of the pipeline pump is not required to be manually regulated, the full-automatic control is realized, the missed regulation is avoided, the manual workload is reduced, and the intelligent and convenient combined control method is more intelligent and more convenient than the manual experience pump regulation, and the frequency of the pipeline pump is better than the experience value. On the other hand, as the frequency regulation strategy of the one-network pipeline pump is controlled according to the opening degree of the electric regulating valve, the opening degree of the valve of each unit can be kept in a larger opening degree as a target, the valve opening degree of each unit is also in an optimal range, the characteristics of each branch pipeline are optimized, the one-network pipeline pump can reach a temperature target at a lower frequency, the power consumption of a heat exchange station is reduced, and the problems that multiple units have different requirements on the lifting and the lowering of the pipeline pump and are difficult to control the pipeline pump are solved.
(2) According to the invention, the opening degree of the electric regulating valve of the most unfavorable unit is controlled to be more than 90% by controlling the frequency of the pump of the network pipeline in the main pipeline, so that the frequency of the pump of the network pipeline is ensured to be maintained in a reasonable range, and the resistance characteristic of the heat supply pipeline is obviously improved. The electric regulating valves of each unit are controlled periodically or in real time, so that the temperature of each unit can be kept in a range with smaller deviation from a target value within a certain period or even at any time.
(3) The invention provides novel pipeline pump control logic, which binds a frequency regulation target with the valve opening of the most unfavorable unit, improves the target temperature, realizes full-automatic control and saves manpower.
Drawings
FIG. 1 is a schematic diagram of an intelligent combined control system of a multi-unit heat exchange station pipeline pump and an electrically-controlled valve.
FIG. 2 is a flow chart of an intelligent combined control method of a multi-unit heat exchange station pipeline pump and an electrically-controlled valve.
Wherein: 1. a net pipeline pump; 2. a PLC control module; 3. a two-net circulating pump; 4. an electric control valve; 5. an intelligent heat supply upper computer; 6. a heat exchanger.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and all the inventions which make use of the inventive concept are protected by the spirit and scope of the present invention as defined and defined in the appended claims to those skilled in the art.
As shown in fig. 1, in one embodiment of the present invention, an intelligent combined control system for a multi-unit heat exchange station pipeline pump and an electric control valve comprises a first-net pipeline pump 1, a second-net circulating pump group, an electric control valve group and a PLC control module 2, wherein the PLC control module 2 is respectively in communication connection with the first-net pipeline pump 1, the second-net circulating pump group and the electric control valve group;
the two-network circulating pump set comprises a plurality of two-network circulating pumps 3, the electric regulating valve group comprises a plurality of electric regulating valves 4, the one-network pipeline pump 1 is arranged in a main pipeline, the main pipeline is connected with a plurality of branch pipelines, and each branch pipeline is provided with a heat exchanger 6, the two-network circulating pumps 3 and the electric regulating valves 4.
In the embodiment, an intelligent combined control system of a pipeline pump and an electric regulating valve of a multi-unit heat exchange station is provided with a pipeline pump 1 in a main pipeline, a plurality of branch pipelines are respectively provided with a two-network circulating pump 3 and an electric regulating valve 4, and the temperature of the branch pipeline area is regulated in a mode of linkage of the pump and the valves.
The PLC control module 2 is also in communication connection with the intelligent heat supply upper computer 5 and is used for remotely monitoring parameters of an intelligent combined control system of the pipeline pump and the electric regulating valve of the multi-unit heat exchange station.
As shown in fig. 2, the intelligent combined control method of the multi-unit heat exchange station pipeline pump and the electrically-controlled valve comprises the following steps:
s1, acquiring actual average temperature of a unit in each branch pipeline, opening of an electric regulating valve 4 and frequency of a network pipeline pump 1;
s2, adjusting the opening of the electric regulating valve 4 based on the actual uniform temperature of the units in each branch pipeline;
s3, adjusting the frequency of the pipeline pump 1 of the network based on the maximum opening value of the electric adjusting valve 4 after adjustment;
s4, based on the frequency of the network pipeline pump 1 after adjustment, intelligent combined control of the pipeline pumps of the multi-unit heat exchange station and the electric regulating valve is completed.
In S2, the method for adjusting the opening of the electric control valve 4 includes the following steps:
s21, setting a target uniform temperature, and calculating deviation between the target uniform temperature and the actual uniform temperature of the unit;
s22, judging whether the deviation is larger than 0, if so, entering S23, and if not, entering S24;
s23, increasing the opening of the electric control valve 4 according to the deviation;
and S24, reducing the opening degree of the electric control valve 4 according to the deviation.
The step S23 is specifically as follows:
if the deviation is less than 0.2, the opening of the electric control valve 4 is kept unchanged;
if the deviation is within the range of [0.2, 0.5), the opening degree of the electric control valve 4 is increased by 0.5 opening degrees;
if the deviation is within the range of [0.5, 1), the opening degree of the electric control valve 4 is increased by 0.8 opening degrees;
if the deviation is within the range of [1,2 ], the opening degree of the electric control valve 4 is increased by 1.5 opening degrees;
if the deviation is within the range of [2,3 ], the opening degree of the electric control valve 4 is increased by 3 opening degrees;
if the deviation is greater than 3, the opening degree of the electric control valve 4 is increased by 5 opening degrees.
The step S24 specifically comprises the following steps:
if the absolute value of the deviation is smaller than 0.2, the opening of the electric regulating valve 4 is kept unchanged;
if the absolute value of the deviation is within the range of [0.2, 0.5), the opening degree of the electric control valve 4 is reduced by 0.5 opening degrees;
if the absolute value of the deviation is within the range of [0.5, 1), the opening degree of the electric control valve 4 is reduced by 0.8 opening degrees;
if the absolute value of the deviation is within the range of [1,2 ], the opening degree of the electric control valve 4 is reduced by 1.5 opening degrees;
if the absolute value of the deviation is within the range of [2,3 ], the opening degree of the electric control valve 4 is reduced by 3 opening degrees;
if the absolute value of the deviation is greater than 3, the opening degree of the electric control valve 4 is reduced by 5 opening degrees.
In this embodiment, the opening of the electric control valve 4 is adjusted according to an electric control valve fuzzy control parameter table, which specifically includes:
TABLE 1 fuzzy control parameter table for electric regulating valve
In this embodiment, the opening degree of the electric control valve 4 may also be controlled by a PID control method, so that the average temperature actual temperature of each branch pipe is controlled within the target temperature range.
The step S3 comprises the following substeps:
s31, acquiring the opening of the electric regulating valve 4 after adjustment, and taking the maximum value of the opening of the electric regulating valve 4 after adjustment as the opening of the electric regulating valve of the most unfavorable unit;
s32, judging whether the opening of the electric regulating valve of the most adverse unit is smaller than 90, if so, calculating the opening deviation of the first valve, and adjusting the frequency of the pipeline pump 1; if not, entering S33;
s33, judging whether the opening degree of the electric regulating valve of the most adverse unit is in the range of [90,95], if so, keeping the frequency of the pipeline pump 1 of the network unchanged; if not, entering S34;
s34, calculating the opening deviation of the second valve, and adjusting the frequency of the pipeline pump 1.
S31, obtaining the electric regulating valve opening degree of the most unfavorable unitThe expression of (2) is specifically:
in the method, in the process of the invention,as a maximum function>For the i-th opening of the electric control valve 4 after adjustment,n is the total number of electric control valves 4.
In the S32, a first valve opening deviation is calculatedThe expression of (2) is specifically:
in the method, in the process of the invention,the opening degree of the electric regulating valve is the most unfavorable unit;
the method for adjusting the frequency of the network pipeline pump 1 comprises the following steps:
if the opening deviation of the first valve is smaller than 1, the frequency of the pipeline pump 1 of the network is kept unchanged;
if the first valve opening deviation is in the range of [1,2 ], the frequency of the one-net pipeline pump 1 is reduced by 0.01Hz;
if the first valve opening deviation is in the range of [2,3 ], the frequency of the one-net pipeline pump 1 is reduced by 0.02Hz;
if the first valve opening deviation is in the range of [3,4 ], the frequency of the one-net pipeline pump 1 is reduced by 0.03Hz;
if the first valve opening deviation is in the range of [4, 5], the frequency of the one-net pipeline pump 1 is reduced by 0.04Hz;
if the first valve opening deviation is greater than 5, the frequency of the one-net pipeline pump 1 is reduced by 0.05Hz.
In the step S34, a second valve opening deviation is calculatedThe expression of (2) is specifically:
the method for adjusting the frequency of the network pipeline pump 1 comprises the following steps:
if the opening deviation of the second valve is smaller than 1, the frequency of the pipeline pump 1 of the network is kept unchanged;
if the second valve opening deviation is in the range of [1,2 ], the frequency of the one-net pipeline pump 1 is increased by 0.01Hz;
if the second valve opening deviation is in the range of [2,3 ], the frequency of the one-net pipeline pump 1 is increased by 0.02Hz;
if the second valve opening deviation is in the range of [3,4 ], the frequency of the one-net pipeline pump 1 is increased by 0.03Hz;
if the second valve opening deviation is in the range of [4, 5], the frequency of the one-net pipeline pump 1 is increased by 0.04Hz;
if the second valve opening deviation is greater than 5, the frequency of the one-net pipeline pump 1 is increased by 0.05Hz.
In this embodiment, compared with the opening adjustment of the electric adjusting valve 4, the frequency adjustment of the one-net pipeline pump 1 has a larger influence on the temperature of each branch pipeline, and generally the frequency adjustment period for adjusting the one-net pipeline pump 1 is 20 minutes, the period can be adjusted according to the actual situation, and the step parameters of the electric adjusting valve 4 and the one-net pipeline pump 1 can be adjusted according to the unit characteristics.
The beneficial effects of the invention are as follows: the invention provides an intelligent combined control system and method for a pipeline pump and an electric regulating valve of a multi-unit heat exchange station, when the opening degree of the electric regulating valve of the most unfavorable unit is not in the range of 90-95, the pipeline pump is regulated, and when the deviation between the actual average temperature and the target average temperature is still larger, the opening degree of an electric regulating valve 4 is regulated, the frequency of the pipeline pump is not required to be manually regulated, the full-automatic control is realized, the missed regulation is avoided, the manual workload is reduced, and the intelligent and convenient electric combined control system is more intelligent and more convenient than the manual experience regulating pump, and the frequency of the pipeline pump is better than the experience value. On the other hand, as the frequency regulation strategy of the one-net pipeline pump 1 is controlled according to the opening degree of the electric regulating valve 4, the opening degree of each unit valve is kept in an optimal range, the characteristics of each branch pipeline are optimized, and the one-net pipeline pump 1 can reach a temperature target at a lower frequency, so that the power consumption of a heat exchange station is reduced, and the problems that multiple units have different requirements on pipeline pump lifting and frequency reducing and are difficult to control the pipeline pump are solved.
According to the invention, the opening degree of the electric regulating valve 4 of the most unfavorable unit is controlled to be more than 90% by controlling the frequency of the pipeline pump 1 of the network in the main pipeline, so that the frequency of the pipeline pump 1 of the network is ensured to be maintained in a reasonable range, and the resistance characteristic of the heat supply pipeline is obviously improved. The electric regulating valves 4 of each unit are controlled periodically or in real time, so that the temperature of each unit can be kept in a range with smaller deviation from a target value in a certain period or even at any time.
The invention provides novel pipeline pump control logic, which binds a frequency regulation target with the valve opening of the most unfavorable unit, improves the target temperature, realizes full-automatic control and saves manpower.
In the description of the present invention, it should be understood that the terms "center," "thickness," "upper," "lower," "horizontal," "top," "bottom," "inner," "outer," "radial," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be interpreted as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defined as "first," "second," "third," or the like, may explicitly or implicitly include one or more such feature.
Claims (7)
1. The intelligent combined control method of the multi-unit heat exchange station pipeline pump and the electric regulating valve is applied to an intelligent combined control system of the multi-unit heat exchange station pipeline pump and the electric regulating valve, the system comprises a first-network pipeline pump (1), a second-network circulating pump group, an electric regulating valve group and a PLC control module (2), wherein the PLC control module (2) is respectively in communication connection with the first-network pipeline pump (1), the second-network circulating pump group and the electric regulating valve group;
the two-network circulating pump set comprises a plurality of two-network circulating pumps (3), the electric regulating valve group comprises a plurality of electric regulating valves (4), the one-network pipeline pump (1) is arranged in a main pipeline, the main pipeline is connected with a plurality of branch pipelines, and each branch pipeline is provided with a heat exchanger (6), the two-network circulating pumps (3) and the electric regulating valves (4);
the PLC control module (2) is also in communication connection with the intelligent heat supply upper computer (5);
the method is characterized by comprising the following steps:
s1, acquiring actual average temperature of a unit in each branch pipeline, opening of an electric regulating valve (4) and frequency of a network pipeline pump (1);
s2, adjusting the opening of the electric regulating valve (4) based on the actual uniform temperature of the units in each branch pipeline;
s3, adjusting the frequency of the network pipeline pump (1) based on the maximum opening value of the adjusted electric regulating valve (4);
s4, based on the frequency of the pipeline pump (1) of the next net after adjustment, intelligent combined control of the pipeline pumps and the electric regulating valves of the multi-unit heat exchange station is completed.
2. The intelligent combined control method of the multi-unit heat exchange station pipeline pump and the electric regulating valve according to claim 1, wherein in the step S2, the method for regulating the opening degree of the electric regulating valve (4) comprises the following sub-steps:
s21, setting a target uniform temperature, and calculating deviation between the target uniform temperature and the actual uniform temperature of the unit;
s22, judging whether the deviation is larger than 0, if so, entering S23, and if not, entering S24;
s23, increasing the opening of the electric regulating valve (4) according to the deviation;
s24, reducing the opening degree of the electric control valve (4) according to the deviation.
3. The intelligent combined control method for the pipeline pump and the electrically-controlled valve of the multi-unit heat exchange station according to claim 2, wherein the step S23 is specifically:
if the deviation is smaller than 0.2, the opening degree of the electric regulating valve (4) is kept unchanged;
if the deviation is within the range of [0.2, 0.5), the opening degree of the electric control valve (4) is increased by 0.5 opening degrees;
if the deviation is within the range of [0.5, 1), the opening degree of the electric control valve (4) is increased by 0.8 opening degrees;
if the deviation is within the range of [1,2 ], the opening degree of the electric control valve (4) is increased by 1.5 opening degrees;
if the deviation is within the range of [2,3 ], the opening degree of the electric control valve (4) is increased by 3 opening degrees;
if the deviation is greater than 3, the opening degree of the electric control valve (4) is increased by 5 opening degrees.
4. The intelligent combined control method for the pipeline pump and the electrically-controlled valve of the multi-unit heat exchange station according to claim 2, wherein the step S24 is specifically:
if the absolute value of the deviation is smaller than 0.2, the opening degree of the electric regulating valve (4) is kept unchanged;
if the absolute value of the deviation is within the range of [0.2,0.5 ], the opening degree of the electric control valve (4) is reduced by 0.5 opening degrees;
if the absolute value of the deviation is within the range of [0.5, 1), the opening degree of the electric control valve (4) is reduced by 0.8 opening degrees;
if the absolute value of the deviation is within the range of [1,2 ], the opening degree of the electric regulating valve (4) is reduced by 1.5 opening degrees;
if the absolute value of the deviation is within the range of [2,3 ], the opening degree of the electric regulating valve (4) is reduced by 3 opening degrees;
if the absolute value of the deviation is greater than 3, the opening of the electric control valve (4) is reduced by 5 openings.
5. The intelligent combined control method for the pipeline pump and the electrically-controlled valve of the multi-unit heat exchange station according to claim 1, wherein the step S3 comprises the following sub-steps:
s31, acquiring the opening of the electric regulating valve (4) after adjustment, and taking the maximum value of the opening of the electric regulating valve (4) after adjustment as the opening of the electric regulating valve of the most unfavorable unit;
s32, judging whether the opening degree of an electric regulating valve of the most adverse unit is smaller than 90, if so, calculating the opening degree deviation of a first valve, and adjusting the frequency of a network pipeline pump (1); if not, entering S33;
s33, judging whether the opening degree of the electric regulating valve of the most adverse unit is in the range of [90,95], if so, keeping the frequency of the pipeline pump (1) of the network unchanged; if not, entering S34;
s34, calculating the opening deviation of the second valve, and adjusting the frequency of the pipeline pump (1) with one net.
6. The intelligent combined control method for the pipeline pump and the electrically-controlled valve of the multi-unit heat exchange station according to claim 5, wherein in the step S32, a first valve opening deviation is calculatedThe expression of (2) is specifically:
in the method, in the process of the invention,the opening degree of the electric regulating valve is the most unfavorable unit;
the method for adjusting the frequency of the network pipeline pump (1) comprises the following steps:
if the opening deviation of the first valve is smaller than 1, the frequency of the network pipeline pump (1) is kept unchanged;
if the opening deviation of the first valve is in the range of [1,2 ], the frequency of the one-net pipeline pump (1) is reduced by 0.01Hz;
if the opening deviation of the first valve is in the range of [2,3 ], the frequency of the one-net pipeline pump (1) is reduced by 0.02Hz;
if the opening deviation of the first valve is in the range of [3,4 ], the frequency of the one-net pipeline pump (1) is reduced by 0.03Hz;
if the opening deviation of the first valve is in the range of [4, 5], the frequency of the one-net pipeline pump (1) is reduced by 0.04Hz;
if the deviation of the opening degree of the first valve is larger than 5, the frequency of the one-net pipeline pump (1) is reduced by 0.05Hz.
7. The intelligent combined control method for the pipeline pump and the electrically-controlled valve of the multi-unit heat exchange station according to claim 6, wherein in the step S34, a second valve opening deviation is calculatedThe expression of (2) is specifically:
the method for adjusting the frequency of the network pipeline pump (1) comprises the following steps:
if the opening deviation of the second valve is smaller than 1, the frequency of the network pipeline pump (1) is kept unchanged;
if the second valve opening deviation is in the range of [1,2 ], the frequency of the one-net pipeline pump (1) is increased by 0.01Hz;
if the second valve opening deviation is in the range of [2,3 ], the frequency of the one-net pipeline pump (1) is increased by 0.02Hz;
if the second valve opening deviation is in the range of [3,4 ], the frequency of the one-net pipeline pump (1) is increased by 0.03Hz;
if the second valve opening deviation is in the range of [4, 5], the frequency of the one-net pipeline pump (1) is increased by 0.04Hz;
if the deviation of the opening degree of the second valve is larger than 5, the frequency of the one-net pipeline pump (1) is increased by 0.05Hz.
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| WO2017204287A1 (en) * | 2016-05-27 | 2017-11-30 | 東芝キヤリア株式会社 | Heat source system and heat source system control method |
| CN211176987U (en) * | 2019-12-06 | 2020-08-04 | 北京奥天奇能源科技有限公司 | Multi-region temperature division control system for distributed variable-frequency two-stage pump of central heating heat exchange station |
| CN116123597A (en) * | 2023-02-16 | 2023-05-16 | 工大科雅（天津）能源科技有限公司 | Self-adaptive variable-frequency control method for heat exchange station circulating pump of courtyard pipe network heat supply system |
| CN117091195A (en) * | 2023-07-24 | 2023-11-21 | 河南理工大学 | Operation regulation and control system and method based on room temperature control and quantity regulation |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017204287A1 (en) * | 2016-05-27 | 2017-11-30 | 東芝キヤリア株式会社 | Heat source system and heat source system control method |
| CN211176987U (en) * | 2019-12-06 | 2020-08-04 | 北京奥天奇能源科技有限公司 | Multi-region temperature division control system for distributed variable-frequency two-stage pump of central heating heat exchange station |
| CN116123597A (en) * | 2023-02-16 | 2023-05-16 | 工大科雅（天津）能源科技有限公司 | Self-adaptive variable-frequency control method for heat exchange station circulating pump of courtyard pipe network heat supply system |
| CN117091195A (en) * | 2023-07-24 | 2023-11-21 | 河南理工大学 | Operation regulation and control system and method based on room temperature control and quantity regulation |
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