CN115727687A - Steam heat pump system output load scheduling and distributing method and system - Google Patents
Steam heat pump system output load scheduling and distributing method and system Download PDFInfo
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Abstract
The invention belongs to the field of heat pumps, and discloses a method and a system for dispatching and distributing output load of a steam heat pump system, wherein the method comprises the steps of calculating an output opening control word target value of the steam heat pump system according to a set temperature of used steam; performing PID calculation according to the set temperature of the used steam and the current temperature of the used steam; correcting the target value of the control word according to the PID calculation output value of the steam, the differential value of the current temperature and the current flow of the pipe network steam, the differential value of the current temperature and the current flow of the steam generated by the steam heat pump system to obtain a control word correction value; judging whether the control word correction value meets a preset condition, if so, adjusting the output opening of the steam heat pump system according to the control word correction value; if not, the output opening of the steam heat pump system is adjusted according to the target value of the control word. According to the invention, the output middle-position used steam load is stable by regulating and controlling the control word of the steam heat pump system, and the use requirement is met.
Description
Technical Field
The invention relates to the technical field of heat pumps, in particular to a method and a system for dispatching and distributing output load of a steam heat pump system.
Background
The steam heat pump system recovers a large amount of waste heat by consuming certain electric energy, realizes high-value steam heat supply, has obvious synergy and has extremely high investment benefit. In actual use, low-level steam generated by the steam heat pump system and high-level steam (generated by a boiler) conveyed by a pipe network form usable medium-level used steam after injection and mixing. The quantity of steam load output by a steam heat pump system and the change rate of steam of a pipe network have certain influence on the stability of steam used at the middle position, and in actual use, the steam used at the middle position is required to be continuously stable. Pipe network steam changes lessly, still influences the stability of using steam, needs to dispatch distribution management to heat pump system output steam load and just can guarantee that the meso position uses steam to last stably, consequently, regulation and control steam heat pump system control word makes its output load satisfy meso position steam steady operation requirement be the technical problem that prime need be solved now.
Disclosure of Invention
The invention aims to provide a method and a system for dispatching and distributing output load of a steam heat pump system, which are used for regulating and controlling control words of the steam heat pump system, so that the output middle-position used steam load is stable, and the use requirement is met.
The technical scheme provided by the invention is as follows:
in one aspect, a steam heat pump system output load scheduling and distributing method is provided, and includes:
acquiring the set temperature of the used steam, the current temperature and the current flow of the pipe network steam, and the current temperature and the current flow of the steam generated by the steam heat pump system;
calculating an output opening degree control word target value of the steam heat pump system according to the set temperature of the used steam;
performing PID calculation according to the set temperature of the used steam and the current temperature of the used steam;
correcting the target value of the control word according to the PID calculation output value of the steam, the differential value of the current temperature and the current flow of the pipe network steam, and the differential value of the current temperature and the current flow of the steam generated by the steam heat pump system to obtain a control word correction value;
judging whether the control word correction value meets a preset condition, if so, adjusting the output opening of the steam heat pump system according to the control word correction value; if not, adjusting the output opening of the steam heat pump system according to the target value of the control word.
In some embodiments, the performing PID calculations based on the set temperature of the steam and the current temperature of the steam specifically includes:
calculating a deviation value of the current temperature of the used steam and the set temperature of the used steam;
and when the deviation value is greater than a preset value and the duration time is greater than the preset time, performing PID calculation according to the set temperature of the used steam and the current temperature of the used steam to obtain a PID calculation output value of the used steam.
In some embodiments, the formula for calculating the target value of the output opening degree control word of the steam heat pump system according to the set temperature using the steam is:
f OBJ ＝k 1 t SET 2 +k 2 t SET +k 3
wherein f is OBJ For controlling the value of the word object, t SET Setting the temperature, k, for using steam 1 、k 2 And k 3 Are each a constant.
In some embodiments, the correction formula of the control word correction value is:
wherein f is SET Is a control word correction value; PID CV Is to calculate an output value using PID of the current temperature of the steam and the set temperature of the steam; t is 0 Is the current temperature of the pipe network steam; q 0 Is the current flow of the pipe network steam; t is 2 Is the current temperature at which steam is used; t is 1 Is the current temperature of the steam generated by the steam heat pump system; q 1 Is the current flow rate, k, of steam generated by the steam heat pump system 4 、k 5 、k 6 、k 7 、k 8 、k 9 Are each a constant.
In some embodiments, the judgment is made whether the control word correction value meets a preset condition, and if yes, the output opening of the heat steam pump system is adjusted according to the control word correction value; if not, adjusting the output opening of the steam heat pump system according to the target value of the control word specifically comprises the following steps:
judging the control word correction value f SET Whether or not at f OBJ If yes, adjusting the output opening of the steam heat pump system according to the corrected value of the control word; if not, adjusting the output opening of the steam heat pump system according to the target value of the control word, wherein f OBJ A is more than or equal to 1 and less than or equal to 3 for controlling the target value of the word.
In another aspect, an output load scheduling and distributing system of a steam heat pump system is further provided, which includes a controller, a plurality of temperature sensors and a plurality of flow sensors, wherein the plurality of temperature sensors and the plurality of flow sensors are respectively electrically connected to the controller;
the temperature sensors are respectively used for acquiring the current temperature of the used steam, the current temperature of the pipe network steam and the current temperature of the steam generated by the steam heat pump system;
the flow sensors are respectively used for collecting the current flow of the steam of the pipe network and the current flow of the steam generated by the steam heat pump system;
the controller is used for acquiring the set temperature of the used steam and performing PID calculation according to the set temperature of the used steam and the current temperature of the used steam; the steam heat pump system is also used for calculating an output opening degree control word target value of the steam heat pump system according to the set temperature of the used steam; correcting the target value of the control word according to the PID calculation output value of the steam, the differential value of the current temperature and the current flow of the pipe network steam, and the differential value of the current temperature and the current flow of the steam generated by the steam heat pump system to obtain a control word correction value; judging whether the control word correction value meets a preset condition, if so, adjusting the output opening of the steam heat pump system according to the control word correction value; if not, adjusting the output opening of the steam heat pump system according to the target value of the control word.
In some embodiments, the controller comprises:
the calculation module is used for calculating a deviation value between the current temperature of the used steam and the set temperature of the used steam;
the judging module is used for judging whether the deviation value is greater than a preset value or not and whether the duration time is greater than preset time or not;
and the calculating module is also used for carrying out PID calculation according to the set temperature of the used steam and the current temperature of the used steam to obtain a PID calculation output value of the used steam when the deviation value is greater than a preset value and the duration time is greater than a preset time.
In some embodiments, the formula for calculating the target value of the output opening degree control word of the steam heat pump system according to the set temperature using the steam is:
f OBJ ＝k 1 t SET 2 +k 2 t SET +k 3
wherein f is OBJ For controlling the value of the word object, t SET Setting the temperature, k, for using steam 1 、k 2 And k 3 Are each a constant.
In some embodiments, the correction formula of the control word correction value is:
wherein f is SET Is a control word correction value; PID CV Is to calculate an output value using PID of the current temperature of the steam and the set temperature of the steam; t is 0 Is the current temperature of the pipe network steam; q 0 Is the current flow of the pipe network steam; t is a unit of 2 Is the current temperature at which steam is used; t is 1 Is the current temperature of the steam generated by the steam heat pump system; q 1 Is the current flow rate, k, of steam generated by the steam heat pump system 4 、k 5 、k 6 、k 7 、k 8 、k 9 Are each a constant.
In some embodiments, the controller comprises:
a judging module for judging the control word correction value f SET Whether or not at f OBJ In the range of + -a;
a control module for correcting the value f when the control word is correct SET At f OBJ When the control word is in the range of +/-a, adjusting the output opening of the steam heat pump system according to the control word correction value; when the control word is corrected to a value f SET Out of f OBJ When the range of +/-a is within, the output opening of the steam heat pump system is adjusted according to the target value of the control word, wherein f OBJ A is more than or equal to 1 and less than or equal to 3 for controlling the target value of the word.
The invention has the technical effects that:
the invention establishes a mathematical relation between a set value of the temperature of the steam and a target value of a control word of the output load opening of the steam heat pump system, then calculates an output value by using a PID of the temperature of the steam, a differential value of the temperature and the flow of the steam of a pipe network, and the differential value of the temperature and the flow of the steam generated by the steam heat pump system act on the target value of the control word of the output opening of the steam heat pump. In addition, the control word correction value is limited in a preset range, so that the change of the number of the control words of the steam heat pump system is small, the output steam load is stable, and the use of steam is stable.
Drawings
The invention is described in further detail below with reference to the following figures and detailed description:
FIG. 1 is a flow diagram of one embodiment of a steam heat pump system output load scheduling assignment method of the present invention;
FIG. 2 is a flow diagram of another embodiment of a method for scheduling and allocating output loads of a steam heat pump system in accordance with the present invention;
fig. 3 is a schematic structural diagram of an output load scheduling distribution system of a steam heat pump system according to the present invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
For the sake of simplicity, only the parts relevant to the present invention are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.
In an embodiment of the present application, as shown in fig. 1 and fig. 2, a steam heat pump system output load scheduling allocation method includes:
s100, acquiring a set temperature of used steam, a current temperature of the used steam, a current temperature and a current flow of pipe network steam, and a current temperature and a current flow of steam generated by a steam heat pump system;
s200, calculating an output opening degree control word target value of the steam heat pump system according to the set temperature of the used steam;
s300, performing PID calculation according to the set temperature of the used steam and the current temperature of the used steam;
s400, correcting the target value of the control word according to the PID calculation output value of the used steam, the differential value of the current temperature and the current flow of the pipe network steam, and the differential value of the current temperature and the current flow of the steam generated by the steam heat pump system to obtain a control word correction value;
s500, judging whether the control word correction value meets a preset condition, if so, adjusting the output opening of the steam heat pump system according to the control word correction value; if not, adjusting the output opening of the steam heat pump system according to the target value of the control word.
Specifically, high-level steam generated by the boiler is conveyed through a pipeline, the high-level steam generated by the boiler is called pipe network steam, a steam heat pump system recovers a large amount of waste heat and then generates low-level steam, and the pipe network steam and the low-level steam generated by the steam heat pump system are injected and mixed to form usable middle-level using steam. Illustratively, the temperature of the pipe network steam is 168 ℃, the temperature of the steam generated by the steam heat pump system is 100 ℃, and the pipe network steam is mixed with the steam generated by the steam heat pump system to obtain 125 ℃ medium steam for use. In the above examples, the steam temperature of the pipe network and the steam temperature generated by the steam heat pump system are used only to illustrate some exemplary values of the present disclosure, and in practical applications, these temperature values may be specifically set according to needs, which is not limited in this application.
The set temperature of the used steam is a target temperature of the used steam preset by a user, the current temperature of the used steam is the actual temperature of the used steam at the collection time, and when the actual temperature of the used steam is deviated from the set temperature of the used steam, the output opening degree of the steam heat pump system needs to be adjusted to enable the temperature of the used steam to be stabilized at the set temperature. The output opening degree control word target value of the steam heat pump system is related to the set temperature of the used steam, the output opening degree control word target value of the steam heat pump system can be calculated according to the set temperature of the used steam, and the set temperature of the used steam is stable, so the output load opening degree control word target value of the steam heat pump system is also stable, and the real-time temperature of the used steam is also stable.
In order to adjust the output load of the steam heat pump system, it is necessary to perform a PID (proportional Integral Derivative) algorithm calculation based on the set temperature of the used steam and the current temperature of the used steam so that the current temperature of the used steam is equal to (close to at most) the set temperature of the used steam set by the user. P in the PID algorithm refers to proportional adjustment, namely multiplying input deviation by a proportional constant; i refers to integral adjustment, namely integral operation is carried out on input deviation; d refers to differential regulation, i.e. differentiating the input deviation.
After the PID calculation output value of the steam is obtained, the target value of the control word is corrected according to the PID calculation output value of the steam, the differential value of the current temperature of the steam, the differential value of the current flow and the current temperature of the pipe network steam, and the differential value of the current temperature and the current flow of the steam generated by the steam heat pump system, so as to obtain a more accurate control word correction value; when the calculated control word correction value is in the preset range, the control word correction value is accurate, and the output opening of the steam heat pump system can be adjusted according to the control word correction value. When the corrected value of the control word is not in the preset range, the corrected value of the control word is not accurate, and at the moment, the output opening of the steam heat pump system can be adjusted according to the target value of the control word.
The invention establishes a mathematical relation between a set value of the temperature of the steam and a target value of a control word of the output load opening of the steam heat pump system, then calculates an output value by using a PID of the temperature of the steam, a differential value of the temperature and the flow of the steam of a pipe network, and the differential value of the temperature and the flow of the steam generated by the steam heat pump system act on the target value of the control word of the output opening of the steam heat pump. In addition, the correction value of the control word is limited in a preset range, so that the change of the number value of the control word of the steam heat pump system is small, the output steam load is stable, and the use of steam is stable.
In some embodiments, the performing PID calculation based on the set temperature of the used steam and the current temperature of the used steam at S300 specifically includes:
s310, calculating a deviation value between the current temperature of the used steam and the set temperature of the used steam;
and S320, when the deviation value is greater than the preset value and the duration is greater than the preset time, performing PID calculation according to the set temperature of the used steam and the current temperature of the used steam to obtain a PID calculation output value of the used steam.
Specifically, when the deviation value is greater than the preset value and the duration is greater than the preset time, it indicates that the used steam is unstable and the output load opening of the steam heat pump system needs to be adjusted, at this time, PID calculation is performed according to the set temperature of the used steam and the current actual temperature of the used steam, so that the PID calculation feedback action is used for correcting the control word correction value, the output opening of the steam heat pump system is adjusted according to the control word correction value, the output load of the steam heat pump system is controlled, and the used steam is stable.
In some embodiments, the calculation formula of calculating the target value of the output opening degree control word of the steam heat pump system according to the set temperature using the steam at S200 is:
f OBJ ＝k 1 t SET 2 +k 2 t SET +k 3
wherein, f OBJ For controlling the value of the word object, t SET Setting the temperature, k, for using steam 1 、k 2 And k 3 Are each a constant.
Specifically, since the output load opening of the steam heat pump system is related to the set temperature of the used steam, the output load opening control word target value of the steam heat pump system can be calculated according to the set temperature of the used steam.
In this embodiment, the relationship between the set temperature of the used steam and the target value of the output load opening control word of the steam heat pump system is obtained by fitting actual experimental data, so that the relationship between the target value of the output load opening control word of the steam heat pump system and the set temperature of the used steam is more in line with an actual use state.
In the embodiment, a mathematical model between the set temperature of the steam and the target value of the output load opening control word of the steam heat pump system is established, and since the set temperature of the steam is stable, the target value of the output load opening control word of the steam heat pump system is also stable, and the actual temperature of the steam is also stable.
In some embodiments, the correction formula of the control word correction value is:
wherein f is SET Is a control word correction value; PID CV PID of the current temperature of the used steam and the set temperature of the used steam calculates an output value; t is 0 Is the current temperature of the pipe network steam; q 0 Is the current flow of the pipe network steam; t is 2 Is the current temperature at which steam is used; t is a unit of 1 Is the current temperature of the steam generated by the steam heat pump system; q 1 Is the current flow rate, k, of steam generated by the steam heat pump system 4 、k 5 、k 6 、k 7 、k 8 、k 9 Are each a constant.
In the embodiment, on one hand, the feedback function of PID calculation is utilized, and the change of the steam is applied to the target value of the control word to form the corrected value of the control word; on the other hand, the estimation function of the differential is utilized, the change trend of the steam generated by the pipe network steam and the steam heat pump system can be obviously reflected, the differential values of the current temperature and the current flow of the pipe network steam and the differential values of the current temperature and the current flow of the steam generated by the steam heat pump system are jointly acted on the target value of the control word of the output opening of the steam heat pump system to form a control word correction value, the output opening of the steam heat pump system is controlled, the output load of the steam heat pump system is adjusted, and the temperature of the used steam is stable.
In some embodiments, the determining step S500 is to determine whether the control word correction value meets a preset condition, and if so, adjust the output opening of the steam heat pump system according to the control word correction value; if not, adjusting the output opening of the steam heat pump system according to the target value of the control word specifically comprises the following steps:
s510, judging the control word correction value f SET Whether or not at f OBJ If yes, adjusting the output opening of the steam heat pump system according to the control word correction value; if not, adjusting the output opening of the steam heat pump system according to the target value of the control word, wherein f OBJ A is more than or equal to 1 and less than or equal to 3 for controlling the target value of the character.
In this embodiment, the control word correction value f SET Is limited to f OBJ In the range of +/-a, a is different in value according to different types and using methods of the steam heat pump system, and a is more than or equal to 1 and less than or equal to 3. The control word correction value is limited within the range of +/-a of the target value of the control word, so that the change of the number of the control words of the steam heat pump system is small, the output steam load is stable, and the use of steam is stable. When the control word correction value is not within the range of +/-a of the control word target value, the control word correction value is incorrect, and at the moment, the output opening of the steam heat pump system is still adjusted according to the control word target value.
Preferably, the pressure of the used steam and/or the pipe network steam can be obtained, and when the pressure of the used steam and/or the pipe network steam exceeds a preset value, an alarm prompt can be sent out to avoid safety accidents.
The invention also provides an embodiment of an output load dispatching and distributing system of a steam heat pump system, which comprises a controller and a first temperature sensor T shown in FIG. 3 0 A second temperature sensor T 1 A third temperature sensor T 2 "first flow sensor Q 0 And a second flow sensor Q 1 First temperature sensor T 0 A second temperature sensor T 1 A third temperature sensor T 2 First flow sensor Q 0 And a second flow sensor Q 1 Are respectively electrically connected with the controller;
first temperature sensor T 0 The system is used for acquiring the current temperature of the steam of the pipe network;
second temperature sensor T 1 Is used for collecting the current temperature of the steam generated by the steam heat pump system,
Third temperature sensor T 2 For collecting the current temperature of the steam used;
first flow sensor Q 0 The system is used for collecting the current flow of the pipe network steam;
second flow sensor Q 1 The system is used for collecting the current flow of the steam generated by the steam heat pump system;
a controller for acquiring a set temperature of the used steam and performing PID calculation according to the set temperature of the used steam and a current temperature of the used steam; the steam heat pump system is also used for calculating an output opening degree control word target value of the steam heat pump system according to the set temperature of the used steam; correcting the target value of the control word according to the PID calculation output value of the used steam, the differential value of the current temperature and the current flow of the pipe network steam, and the differential value of the current temperature and the current flow of the steam generated by the steam heat pump system to obtain a control word correction value; judging whether the control word correction value meets a preset condition, if so, adjusting the output opening of the steam heat pump system according to the control word correction value; if not, adjusting the output opening of the steam heat pump system according to the target value of the control word.
Further, the steam heat pump system output load scheduling distribution system also comprises a third flow sensor Q 2 First pressure sensor P 0 A second pressure sensor P 1 And a third pressure sensor P 2 Third flow sensor Q 2 For measuring the flow rate of the steam used, a first pressure sensor P 0 A second pressure sensor P for measuring the pressure of the steam in the pipe network 1 For measuring the pressure of the steam generated by the steam heat pump system, a third pressure sensor P 2 For measuring the pressure of the steam used. When the first pressure sensor P 0 A second pressure sensor P 1 And a third pressure sensor P 2 When the detected pressure exceeds a preset value, an alarm can be given out to avoid safety accidents.
Further, the controller includes:
the calculation module is used for calculating a deviation value between the current temperature of the used steam and the set temperature of the used steam;
the judging module is used for judging whether the deviation value is greater than a preset value or not and whether the duration time is greater than preset time or not;
and the calculating module is also used for carrying out PID calculation according to the set temperature of the used steam and the current temperature of the used steam to obtain a PID calculation output value of the used steam when the deviation value is greater than the preset value and the duration is greater than the preset time.
The calculation formula for calculating the target value of the output opening degree control word of the steam heat pump system according to the set temperature using the steam is as follows:
f OBJ ＝k 1 t SET 2 +k 2 t SET +k 3
wherein f is OBJ For controlling the value of the word object, t SET Setting the temperature, k, for using steam 1 、k 2 And k 3 Are each a constant.
The correction formula of the control word correction value is as follows:
wherein f is SET Is a control word correction value; PID CV Is to calculate an output value using PID of the current temperature of the steam and the set temperature of the steam; t is 0 Is the current temperature of the steam in the pipe network; q 0 Is the current flow of the pipe network steam; t is 2 Is the current temperature at which steam is used; t is a unit of 1 Is the current temperature of the steam generated by the steam heat pump system; q 1 Is the current flow rate, k, of the steam generated by the steam heat pump system 4 、k 5 、k 6 、k 7 、k 8 、k 9 Are each a constant.
The controller includes:
a judging module for judging the control word correction value f SET Whether or not at f OBJ In the range of + -a;
a control module for correcting the value f when the control word is corrected SET At f OBJ When the range is +/-a, adjusting the output opening of the steam heat pump system according to the correction value of the control word; when the control word correction value f SET Is out of f OBJ A is a rangeWhen in the enclosure, the output opening of the steam heat pump system is adjusted according to the target value of the control word, wherein f OBJ A is more than or equal to 1 and less than or equal to 3 for controlling the target value of the character.
Specifically, this embodiment is a system embodiment corresponding to the above method embodiment, and specific effects refer to the above method embodiment, which is not described in detail herein.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A steam heat pump system output load scheduling and distributing method is characterized by comprising the following steps:
acquiring a set temperature of used steam, a current temperature of the used steam, a current temperature and a current flow of pipe network steam, and a current temperature and a current flow of steam generated by a steam heat pump system;
calculating an output opening degree control word target value of the steam heat pump system according to a set temperature using the steam;
performing PID calculation according to the set temperature of the used steam and the current temperature of the used steam;
correcting the target value of the control word according to the PID calculation output value of the used steam, the differential value of the current temperature and the current flow of the pipe network steam, and the differential value of the current temperature and the current flow of the steam generated by the steam heat pump system to obtain a control word correction value;
judging whether the control word correction value meets a preset condition, if so, adjusting the output opening of the steam heat pump system according to the control word correction value; if not, adjusting the output opening of the steam heat pump system according to the target value of the control word.
2. The output load dispatching distribution method of steam heat pump system according to claim 1,
the PID calculation according to the set temperature of the used steam and the current temperature of the used steam specifically includes:
calculating a deviation value between the current temperature of the used steam and the set temperature of the used steam;
and when the deviation value is greater than the preset value and the duration is greater than the preset time, performing PID calculation according to the set temperature of the used steam and the current temperature of the used steam to obtain a PID calculation output value of the used steam.
3. The output load dispatching distribution method of steam heat pump system according to claim 1,
the formula for calculating the target value of the output opening degree control word of the steam heat pump system according to the set temperature using the steam is as follows:
f OBJ ＝k 1 t SET 2 +k 2 t SET +k 3
wherein f is OBJ For controlling the value of the word object, t SET Setting the temperature, k, for using steam 1 、k 2 And k 3 Are each a constant.
4. The output load dispatching distribution method of steam heat pump system according to claim 1,
the correction formula of the control word correction value is as follows:
wherein f is SET Is a control word correction value; PID CV PID of the current temperature of the used steam and the set temperature of the used steam calculates an output value; t is a unit of 0 Is the current temperature of the pipe network steam; q 0 Is the current flow of the pipe network steam; t is a unit of 2 Is the current temperature at which steam is used; t is 1 Is the current temperature of the steam generated by the steam heat pump system; q 1 Is the current flow rate, k, of the steam generated by the steam heat pump system 4 、k 5 、k 6 、k 7 、k 8 、k 9 Are each a constant.
5. The method of claim 1, wherein the method further comprises the step of allocating the output load of the steam heat pump system,
judging whether the control word correction value meets a preset condition, if so, adjusting the output opening of the steam heat pump system according to the control word correction value; if not, adjusting the output opening of the steam heat pump system according to the target value of the control word specifically comprises the following steps:
judging the control word correction value f SET Whether or not at f OBJ If yes, adjusting the output opening of the steam heat pump system according to the corrected value of the control word; if not, adjusting the output opening of the steam heat pump system according to the target value of the control word, wherein f OBJ A is more than or equal to 1 and less than or equal to 3 for controlling the target value of the character.
6. The output load scheduling and distributing system of the steam heat pump system is characterized by comprising a controller, a plurality of temperature sensors and a plurality of flow sensors, wherein the temperature sensors and the flow sensors are respectively electrically connected with the controller;
the temperature sensors are respectively used for acquiring the current temperature of the used steam, the current temperature of the pipe network steam and the current temperature of the steam generated by the steam heat pump system;
the flow sensors are respectively used for collecting the current flow of the steam of the pipe network and the current flow of the steam generated by the steam heat pump system;
the controller is used for acquiring the set temperature of the used steam and performing PID calculation according to the set temperature of the used steam and the current temperature of the used steam; the steam heat pump system is also used for calculating an output opening degree control word target value of the steam heat pump system according to the set temperature of the used steam; correcting the target value of the control word according to the PID calculation output value of the used steam, the differential value of the current temperature and the current flow of the pipe network steam, and the differential value of the current temperature and the current flow of the steam generated by the steam heat pump system to obtain a control word correction value; judging whether the control word correction value meets a preset condition, if so, adjusting the output opening of the steam heat pump system according to the control word correction value; if not, adjusting the output opening of the steam heat pump system according to the target value of the control word.
7. The output load dispatching distribution system of claim 6,
the controller includes:
the calculating module is used for calculating a deviation value between the current temperature of the used steam and the set temperature of the used steam;
the judging module is used for judging whether the deviation value is greater than a preset value or not and whether the duration time is greater than preset time or not;
and the calculating module is also used for carrying out PID calculation according to the set temperature of the used steam and the current temperature of the used steam to obtain a PID calculation output value of the used steam when the deviation value is greater than a preset value and the duration time is greater than a preset time.
8. The output load dispatching distribution system of claim 6,
the formula for calculating the target value of the output opening degree control word of the steam heat pump system according to the set temperature using the steam is as follows:
f OBJ ＝k 1 t SET 2 +k 2 t SET +k 3
wherein f is OBJ For controlling the value of the word object, t SET Setting the temperature, k, for using steam 1 、k 2 And k 3 Are each a constant.
9. The steam heat pump system output load dispatching distribution system of claim 6,
the correction formula of the control word correction value is as follows:
wherein f is SET Is a control word correction value; PID CV Is to calculate an output value using PID of the current temperature of the steam and the set temperature of the steam; t is a unit of 0 Is the current temperature of the pipe network steam; q 0 Is the current flow of the pipe network steam; t is 2 Is the current temperature at which steam is used; t is a unit of 1 Is the current temperature of the steam generated by the steam heat pump system; q 1 Is the current flow rate, k, of the steam generated by the steam heat pump system 4 、k 5 、k 6 、k 7 、k 8 、k 9 Are each a constant.
10. The steam heat pump system output load dispatching distribution system of claim 6,
the controller includes:
a judging module for judging the control word correction value f SET Whether or not at f OBJ In the range of + -a;
a control module for correcting the value f when the control word is corrected SET At f OBJ When the control word is in the range of +/-a, adjusting the output opening of the steam heat pump system according to the control word correction value; when the control word correction value f SET Is out of f OBJ When the range of +/-a is within, the output opening of the steam heat pump system is adjusted according to the target value of the control word, wherein f OBJ A is more than or equal to 1 and less than or equal to 3 for controlling the target value of the character.
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