CN112797683B - Cooperative control system for multiple refrigerating units of energy station - Google Patents
Cooperative control system for multiple refrigerating units of energy station Download PDFInfo
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- CN112797683B CN112797683B CN202011632075.3A CN202011632075A CN112797683B CN 112797683 B CN112797683 B CN 112797683B CN 202011632075 A CN202011632075 A CN 202011632075A CN 112797683 B CN112797683 B CN 112797683B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
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Abstract
The invention discloses a cooperative control system of a plurality of refrigerating units of an energy station, which comprises the energy station and an industrial park workshop, wherein the energy station is provided with n refrigerating machines; the industrial park workshop is provided with a cooling system, the outlet of the refrigerator is connected with the cooling system through a water inlet pipeline, and the outlet of the cooling system is connected with the refrigerator through a water return pipeline; return water pipe is equipped with return water temperature sensor, the industry garden workshop is equipped with garden temperature sensor, the refrigerator all is equipped with the journey controller, garden workshop temperature controller is connected to the journey controller, garden workshop temperature controller connects return water temperature sensor and acquires return water temperature measurement value, garden workshop temperature controller connects garden temperature sensor and acquires workshop temperature measurement value, garden workshop temperature controller controls the refrigerator work through the journey controller. The invention takes the park workshop temperature value as the main control variable and the return water temperature of the refrigerating unit as the auxiliary control variable, thereby reducing the influence of multiple factors on the cold source temperature of the park workshop.
Description
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to a cooperative control system of a plurality of refrigerating units of an energy station.
Background
The multi-energy station generally comprises power distribution equipment, a gas boiler, a refrigerator, photovoltaic equipment, energy storage equipment and the like, wherein the refrigerator is one of important component equipment of the energy station and is used for providing cold sources including cold air, cooling water and the like for an industrial park.
The existing method generally performs start-stop control of a plurality of refrigerating units through the return water temperature of the refrigerating units. When the return water temperature is too high, a plurality of refrigerating units are started simultaneously, and when the return water temperature is lower, a certain refrigerating unit is started. Therefore, the existing control method has the following defects:
when the return water temperature reaches the refrigerating unit through the long-distance pipeline from the workshop of the park factory, the time delay is large, and the long-distance pipeline can also reduce (winter) or increase (summer) the return water temperature, so that the change of the temperature is additionally caused, the refrigerating unit can be adjusted according to the temperature, the influence of external factors on the temperature of the park workshop can not be compensated, and the adjusting time is long.
The multiple refrigerating units are started according to the deviation range of the return water temperature, the over-regulation and under-regulation conditions exist, the over-regulation directly causes energy loss, and the under-regulation causes the cooling quality to be reduced.
The park workshop temperature value is remotely transmitted to the refrigerator return water temperature control loop to serve as a main control variable, the existing refrigerator set return water temperature is used as a secondary control variable, and the refrigerator set return water temperature and the park workshop cold source temperature form a cascade control loop, so that the influence of multiple factors on the park workshop cold source temperature is eliminated.
Furthermore, the invention carries out the split-range control on the total control quantity obtained in the last step, and the total control quantity respectively acts on n refrigerating units, thereby realizing the cooperative control of a plurality of refrigerating units.
Disclosure of Invention
In view of at least one defect of the prior art, the invention aims to provide a cooperative control system for a plurality of refrigerating units in an energy station, which remotely transmits a park workshop temperature value to a park workshop temperature controller D1(s) as a main control variable, and takes the return water temperature of the existing refrigerating unit as a secondary control variable, thereby reducing the influence of environmental factors on the cold source temperature of the park workshop.
In order to achieve the purpose, the invention adopts the following technical scheme: a cooperative control system for a plurality of refrigerating units in an energy station comprises the energy station and a cooling system, wherein the cooling system is arranged in a workshop of an industrial park, the energy station is provided with n refrigerating machines which are connected in parallel, and n is an integer greater than or equal to 3; the key points are that the outlets of the n refrigerators are connected with the inlets of the cooling system through water inlet pipelines, and the outlets of the cooling system are connected with the inlets of the n refrigerators through water return pipelines; industry garden workshop is provided with return water temperature sensor, return water pipeline's head end is provided with garden temperature sensor, each refrigerator all is provided with corresponding journey controller, the journey controller is connected with garden workshop temperature controller D1(s), garden workshop temperature controller D1(s) are equipped with workshop temperature setting value SPT1, garden workshop temperature controller D1(s) are connected return water temperature sensor and are acquireed return water temperature measurement value PVT2, garden workshop temperature controller D1(s) are connected garden temperature sensor and are acquireed workshop temperature measurement value PVT1, garden workshop temperature controller D1(s) are through journey controller control refrigerator work.
Through foretell structure setting, garden workshop temperature controller D1(s) not only obtain return water temperature measurement value PVT2 through return water temperature sensor, still obtain workshop temperature measurement value PVT1 through garden temperature sensor and control many refrigerators, be favorable to reducing environmental factor, for example the high temperature and the low temperature of external environment are to return water temperature measurement value PVT 2's influence to more be favorable to controlling the work of freezer.
And the park workshop temperature controller D1(s) controls the work of the split-range controller through a PID control algorithm, and the split-range controller controls the work of the freezer by adopting a PI algorithm.
The control is carried out through the algorithm, so that the influence of environmental factors on the refrigeration of the refrigerator is favorably reduced.
The park workshop temperature controller D1(s) acquires a workshop temperature set value SPT1 and a workshop temperature measured value PVT1 to perform feedback operation, generates corresponding control quantity of the refrigerating machine and transmits the control quantity to the split-range controller, and the split-range controller acquires the control quantity of the refrigerating machine and performs feedback operation by combining with output data of the corresponding refrigerating machine to control the refrigerating machine to work; the working output cooling water of the refrigerator is supplied to a cooling system, the cooling water flows back to the refrigerator through a water return pipeline, and a water return temperature sensor acquires a water return temperature measured value PVT2 and transmits the water return temperature measured value PVT2 to a park workshop temperature controller D1(s).
The industrial park workshop is provided with at least two workshop inner spaces, each workshop inner space is internally provided with a cooling device and an inner space temperature sensor, and all the cooling devices are connected in parallel to form the cooling system; all the internal space temperature sensors are connected with the park workshop temperature controller D1(s);
the energy station is also provided with an auxiliary refrigerating machine, the auxiliary refrigerating machine is provided with an auxiliary controller, the auxiliary controller is connected with a park workshop temperature controller D1(s), an inlet of the auxiliary refrigerating machine is connected with the tail end of a water return pipeline, an auxiliary water inlet pipeline penetrates through the water inlet pipeline, and the head end of the auxiliary water inlet pipeline penetrates through the head end of the water inlet pipeline and is connected with an outlet of the auxiliary refrigerating machine; the tail end of the auxiliary water inlet pipeline is connected with a branch water pipe corresponding to the cooling device, and the branch water pipe is connected to the inlet of the corresponding cooling device;
the tail end of the branch water pipe is provided with an electromagnetic valve, and the electromagnetic valve is connected with a park workshop temperature controller D1(s);
when the auxiliary refrigerator works, the temperature of cooling water in the auxiliary water inlet pipeline is lower than that of the cooling water in the water inlet pipeline, and the pressure of the cooling water in the auxiliary water inlet pipeline is higher than that of the cooling water in the water inlet pipeline.
When the temperature of a certain workshop internal space of an industrial park workshop abnormally rises, in order to facilitate the temperature reduction of the workshop internal space, after a park workshop temperature controller D1(s) acquires a temperature signal of an internal space temperature sensor of the workshop internal space, the temperature signal abnormally rises, a park workshop temperature controller D1(s) is provided with a microprocessor which controls the corresponding electromagnetic valve to be opened, meanwhile, sending command signals to an auxiliary controller to control the auxiliary refrigerating machine to work, wherein the temperature of cooling water output by the auxiliary refrigerating machine is lower than that of the cooling water in the water inlet pipeline, the pressure of the cooling water in the auxiliary water inlet pipeline is higher than that of the cooling water in the water inlet pipeline, the inlet of the cooling device corresponding to the internal space of the workshop releases cooling water with lower temperature, so that the cooling capacity of the cooling device is improved, and the cooling effect of the internal space of the workshop is improved. When the temperature of the internal space of the workshop is normal, the control electromagnetic valve and the auxiliary refrigerator are closed.
The system has the remarkable effects that the system remotely transmits the park workshop temperature value to the park workshop temperature controller D1(s) to serve as a main control variable, and the return water temperature of the existing refrigerating unit serves as a secondary control variable, so that the influence of environmental factors on the cold source temperature of the park workshop is reduced.
Drawings
FIG. 1 is a first block diagram of the present invention;
FIG. 2 is a diagram of a mathematical model architecture of the present invention;
FIG. 3 is a diagram showing the relationship between the total control quantity of the park workshop temperature controller and the control quantity of the refrigerator in a divided manner;
FIG. 4 is a block diagram of a control system of the present invention;
fig. 5 is a second structural view of the present invention.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
As shown in fig. 1-5, the cooperative control system for multiple refrigerating units in an energy station comprises an energy station 1 and an industrial park workshop 2, wherein the energy station 1 is provided with n refrigerators 11 connected in parallel, and n is an integer greater than or equal to 3; the industrial park workshop 2 is provided with a cooling system 21, the outlets of N refrigerators 2 are connected with the inlet of the cooling system 21 through a water inlet pipeline 12, and the outlets of the cooling system 21 are connected with the inlets of the N refrigerators 2 through a water return pipeline 13; the end of return water pipeline 13 is provided with return water temperature sensor 131, the head end of return water pipeline 13 is provided with garden temperature sensor 22, each refrigerator 11 all is provided with corresponding journey controller 111, journey controller 111 is connected with garden workshop temperature controller D1(s), garden workshop temperature controller D1(s) are equipped with workshop temperature setting value SPT1, garden workshop temperature controller D1(s) are connected return water temperature sensor 131 and are acquireed return water temperature measurement value PVT2, garden workshop temperature controller D1(s) are connected garden temperature sensor 22 and are acquireed workshop temperature measurement value PVT1, garden workshop temperature controller D1(s) are through journey controller 111 control refrigerator 11 work.
As shown in fig. 1, n refrigerators 11 are connected in parallel, and the inlets are connected to the end of a return pipe 13; the outlets are each connected to a head end of the inlet conduit 12. Each of the refrigerators 11 is provided with an electromagnetic valve and is opened during operation.
The park workshop temperature controller D1(s) adopts a PID control algorithm, and the initial setting value of the control parameter is as follows:
KP1＝50，TI1＝30，TD1＝0.5；
the control parameters of the park workshop temperature controller can be modified or re-tuned again through the human-computer interface.
The secondary controller adopts PI algorithm, and the initial setting values of the control parameters are as follows:
KP21＝KP22＝……KP2n＝80；
TI21＝TI22＝……TI2n＝10；
the control parameters of the secondary controller can be modified or re-tuned again through the human-computer interface.
As shown in fig. 2, D1(s) is a yard shop temperature controller, D1(s), D21(s), and D22(s) … … D2n(s) are the process controllers 111 corresponding to 1 to n refrigerators 11, and correspond to the control of 1 … … n refrigerators 11. D21(s) and D22(s) … … D2n(s) are combined to form a sub controller, G21(s) and G22(s) … … G2n(s) are sub control objects and correspond to transfer functions of 1 to n refrigerators.
G1(s) is the transfer function of the primary control object.
The SPT1 is a park workshop temperature set value, the PVT2 is a return water temperature measured value of the energy station 1, and the PVT1 is a park workshop temperature measured value. The control amount of the yard plant temperature controller D1(s) was calculated as follows:
SPT1(k) is the set value of the temperature of the district workshop at the current sampling time, PVT1(k) is the measured value of the temperature of the district workshop at the current sampling time, e1(k) Deviation of the park workshop temperature set value from the measured value at the current sampling moment, e1(k-1) deviation of the park workshop temperature set value from the measured value at the last sampling time, e1And (k-2) is the deviation of the park workshop temperature set value and the measured value at the last sampling moment. KP1、TI1And TD1Control parameters for a park plant temperature controller D1(s), where KP1Is a proportionality coefficient, TI1For integration time, TD1Is the differential time; t isS1Sampling period for a park workshop temperature controller;
the total control quantity output by the park workshop temperature controller D1(s) at the current moment is u1(k)，Δu1(k) The total control quantity increment of a park workshop temperature controller D1(s) at the current moment; u. of1(k-1) is the total control quantity output by the park workshop temperature D1(s) at the last sampling moment;
k is the current sampling moment, k-1 is the last sampling moment, and k-2 is the last sampling moment of k-1.
Control parameter K of park temperature controllerP1、TI1、TD1The initial setting value is as follows:
KP1＝50,TI1＝30,TD1＝0.5；
the control parameters of the campus temperature controller D1(s) may be modified or re-tuned again via the human machine interface. The range controller 111 of each refrigerating machine 11 calculates the control amount thereof by using the following equation:
ujs(k) the set value of the backwater temperature allocated by the coordinated control method for a plurality of refrigerators 11, j 1 … n corresponds to 1 to n refrigerators 11, PVT2(k) is the measured value of the backwater temperature of the refrigerator 11, ej2(k) Deviation of set value and measured value of backwater temperature at current sampling moment, ej2(k-1) is the deviation between the set value of the return water temperature and the measured value at the last sampling moment; kPj2And TIj2Is a control parameter of the split range controller 111, where KPj2Is a proportionality coefficient, TIj2Is the integration time; t isS2Sampling period of the split-range controller;
the control quantity output by the current time split controller 111 is uj2(k)，Δuj2(k) Increment of the control quantity of the split controller 111 at the current moment; u. ofj2(k-1) is the control quantity output by the split-range controller 111 at the last sampling moment;
set value u of return water temperature of a plurality of refrigerators 11js(k) And (3) performing cooperative distribution according to the rule shown in FIG. 3:
setting the total control quantity output by the park workshop temperature controller D1(s) at the current moment as u1(k)，u1(k) Is 100%, i.e. u1max＝100％。
The maximum set values of the control amounts of the range controllers 111 of the individual refrigerators 11 are u1s,u2s,u3s…unsAnd satisfies the following constraint relationship:
u1s+u2s+u3s+…+uns＝u1max＝100％。
the number of refrigerators 11 in the energy station is n, and the control amounts applied to each refrigerator 11 corresponding to the current time are: u. of1s(k),u2s(k),u3s(k)…uns(k) And satisfies the following constraint relationship:
u1s(k)+u2s(k)+u3s(k)+…+uns(k)＝u1(k)；
the initial setting value of the control parameter of the split-range controller 111 shown in formula 2 is:
KPj2＝80,j＝1…n；
TIj2＝10,j＝1…n；
the control parameters of the split-range controller 111 can be modified or re-tuned again through a human-computer interface;
according to the algorithm, the method further comprises the following steps:
when u is1(k)≤u1sIn the case of 1# refrigerator 11, u is1s(k)＝u1(k) Carrying out automatic speed change control on a set value; in order to avoid long-term operation of a particular refrigerating machine 11, a duty cycle T is provided at intervalsWThen, correspond to u1s,u2s,u3s…unsThe serial numbering of the refrigerators 11 is cycled in succession, i.e. at intervals of one operating period TWThereafter, the 1# refrigerator 11 is stopped, and the 2# refrigerator 11 is stopped at u1(k) The automatic control of the speed change is performed for the set value, and the long-term operation of the 1# refrigerator 11 is avoided.
When u is1s＜u1(k)≤u1s+u2sAt the time, the 1# refrigerator 11 is operated at full load, and the 2# refrigerator 11 is operated at u2s(k)＝u1(k)-u1sAnd carrying out automatic speed change control on the set value. In order to avoid long-term operation of 2 refrigerators 11, one working period T is providedWThen, correspond to u1s,u2s,u3s…unsThe numbers of the adjacent 2 refrigerators 11 are sequentially circulated.
When u is1s+u2s＜u1(k)≤u1s+u2s+u3sAt the time, the 1# and 2# refrigerators 11 are operated at full capacity, and the 3# refrigerator 11 is operated at u3s(k)＝u1(k)-u1s-u2sAnd carrying out automatic speed change control on the set value. In order to avoid long-term operation of 3 refrigerators 11, one working period T is providedWThen, correspond to u1s,u2s,u3s…unsThe numbers of the adjacent 3 refrigerators 11 are sequentially circulated.
By analogy, the cooperative control of the plurality of refrigerators 11 in the energy station 1 is realized.
The park workshop temperature controller D1(s) controls the work of the split-range controller 111 through a PID control algorithm, and the split-range controller 111 controls the work of the freezer 11 through a PI algorithm.
Now, the control process of the park workshop temperature controller D1(s) will be described with reference to fig. 3, where the total control amount output by the park workshop temperature controller D1(s) at the present time is set as u1(k)，u1(k) Is 100%, i.e. u1max100%. The number of refrigerators in the energy station is n, and the control quantity is u1(k),u2(k),u3(k)…un(k) According to the control law of the distribution, the maximum setting value of the control quantity of the distribution controller 111 of each refrigerating machine 11 is u1s,u2s,u3s…unsAnd satisfies the following constraint relationship:
u1s+u2s+u3s+…+uns＝u1max＝100％。
according to the algorithm: further comprising the following steps:
when u is1(k)≤u1sWhile the 1# freezer was operating at 0-100% load, u1(k)＝0-u1sCorresponding to 0 to 100 percentA load; in order to avoid long-term operation of a particular refrigerating machine 11, a duty cycle T is provided at intervalsWThen, correspond to u1s,u2s,u3s…unsThe serial numbers of the refrigerators in (a) are sequentially circulated.
When u is1s＜u1(k)≤u1s+u2sWhen the 1# refrigerator is operated at full load, the 2# refrigerator is operated at 0-100% load, u2(k)＝0-u2sCorresponding to 0-100% load; in order to avoid long-term operation of 2 refrigerators, one working period T is arranged at intervalsWThen, correspond to u1s,u2s,u3s…unsThe numbers of the adjacent 2 refrigerators are sequentially circulated.
When u is1s+u2s＜u1(k)≤u1s+u2s+u3sIn the case of the 1# and 2# refrigerators operating at full load, the 3# refrigerator operating at 0-100% load, u3(k)＝0-u3sCorresponding to 0-100% load; in order to avoid long-term operation of 3 refrigerators, one working period T is arranged at intervalsWThen, correspond to u1s,u2s,u3s…unsThe numbers of the adjacent 3 refrigerators are sequentially circulated.
And the rest can be analogized in turn to realize the cooperative control of a plurality of refrigerators in the energy station.
As shown in fig. 1 and 2, the campus plant temperature controller D1(s) obtains the plant temperature set value SPT1 and the plant temperature measured value PVT1, performs feedback operation to generate a corresponding control amount of the chiller 11, and transmits the control amount to the relay controller 111, and the relay controller 111 obtains the control amount of the chiller 11 and performs feedback operation to control the operation of the chiller 11 in combination with the output data of the corresponding chiller 11; the refrigerator 11 works and outputs cooling water to the cooling system 21 through the water inlet pipeline 12, the cooling water flows back to the refrigerator 11 through the water return pipeline 13, and the water return temperature sensor 131 obtains a water return temperature measured value PVT2 and transmits the water return temperature measured value PVT2 to the park workshop temperature controller D1(s).
The industrial park workshop 2 is provided with at least two workshop internal spaces 23, each workshop internal space 23 is internally provided with a cooling and temperature-reducing device 211 and an internal space temperature sensor 221, and all the cooling and temperature-reducing devices 211 are connected in parallel to form the cooling and temperature-reducing system 21; all the interior space temperature sensors 221 are connected to the campus plant temperature controller D1(s);
the energy station 1 is further provided with an auxiliary refrigerating machine 15, the auxiliary refrigerating machine 15 is provided with an auxiliary controller 151, the auxiliary controller 151 is connected with a park workshop temperature controller D1(s), an inlet of the auxiliary refrigerating machine 15 is connected with the tail end of the water return pipeline 13, an auxiliary water inlet pipeline 16 penetrates through the water inlet pipeline 12, the head end of the auxiliary water inlet pipeline 16 penetrates out of the head end of the water inlet pipeline 12 to be connected with an outlet of the auxiliary refrigerating machine 15, and a corresponding leakage-proof facility is arranged at the penetrating position; the tail end of the auxiliary water inlet pipeline 16 is connected with a branch water pipe 161 corresponding to the cooling temperature reduction device 211, and the branch water pipe 161 is connected to the inlet of the corresponding cooling temperature reduction device 211;
the end of the branch water pipe 161 is provided with an electromagnetic valve 17, and the electromagnetic valve 17 is connected with a park workshop temperature controller D1(s) through a corresponding control cable. The joints of the pipelines are provided with corresponding leakage-proof facilities.
When the auxiliary freezer 15 is in operation, the temperature of the cooling water in the auxiliary water inlet conduit 16 is lower than the temperature of the cooling water in the water inlet conduit 12, and the pressure of the cooling water in the auxiliary water inlet conduit 16 is higher than the pressure of the cooling water in the water inlet conduit 12.
Finally, it is noted that: the above-mentioned embodiments are only examples of the present invention, and it is a matter of course that those skilled in the art can make modifications and variations to the present invention, and it is considered that the present invention is protected by the modifications and variations if they are within the scope of the claims of the present invention and their equivalents.
Claims (8)
1. A cooperative control system for a plurality of refrigerating units in an energy station comprises the energy station (1) and a cooling system (21), wherein the cooling system (21) is arranged in an industrial park workshop (2), the energy station (1) is provided with n refrigerating machines (11) connected in parallel, and n is an integer greater than or equal to 3; the system is characterized in that outlets of n refrigerators (11) are connected with inlets of a cooling system (21) through a water inlet pipeline (12), and outlets of the cooling system (21) are connected with inlets of the n refrigerators (11) through a water return pipeline (13); the tail end of return water pipeline (13) is provided with return water temperature sensor (131), industrial park workshop (2) is provided with garden temperature sensor (22), each refrigerator (11) all is provided with corresponding range controller (111), range controller (111) are connected with park workshop temperature controller D1(s), park workshop temperature controller D1(s) are equipped with workshop temperature setting value SPT1, park workshop temperature controller D1(s) are connected return water temperature sensor (131) and are acquireed return water temperature measurement value PVT2, park workshop temperature controller D1(s) are connected with park temperature sensor (22) and are acquireed workshop temperature measurement value PVT1, park workshop temperature controller D1(s) control refrigerator (11) work through range controller (111).
2. The cooperative control system for a plurality of refrigeration units of an energy station as recited in claim 1, wherein: the park workshop temperature controller D1(s) controls the work of the split-range controller (111) through a PID control algorithm, and the split-range controller (111) controls the work of the refrigerating machine (11) by adopting a PI algorithm.
3. The cooperative control system for a plurality of refrigeration units of an energy station as recited in claim 1, wherein: the park workshop temperature controller D1(s) acquires a workshop temperature set value SPT1 and a workshop temperature measured value PVT1 to perform feedback operation, generates corresponding control quantity of the refrigerating machine (11) and transmits the control quantity to the relay controller (111), and the relay controller (111) acquires the control quantity of the refrigerating machine (11) and performs feedback operation by combining with corresponding output data of the refrigerating machine (11) to control the working of the refrigerating machine (11); the refrigerator (11) works, cooling water is output to the cooling and temperature reducing system (21) through the water inlet pipeline (12), the cooling water flows back to the refrigerator (11) through the water return pipeline (13), and the water return temperature sensor (131) obtains a water return temperature measured value PVT2 and transmits the water return temperature measured value PVT2 to the park workshop temperature controller D1(s).
4. The cooperative control system for a plurality of refrigeration units of an energy station as recited in claim 1, wherein: the total control quantity of the park workshop temperature controller D1(s) is calculated according to the following formula:
SPT1(k) is the set value of the temperature of the district workshop at the current sampling time, PVT1(k) is the measured value of the temperature of the district workshop at the current sampling time, e1(k) Deviation of the park workshop temperature set value from the measured value at the current sampling moment, e1(k-1) deviation of the park workshop temperature set value from the measured value at the last sampling time, e1(k-2) is the deviation between the park workshop temperature set value and the measured value at the last sampling moment; kP1、TI1And TD1Control parameters for a park plant temperature controller D1(s), where KP1Is a proportionality coefficient, TI1For integration time, TD1Is the differential time; t isS1The sampling period for the campus plant temperature controller D1(s);
the total control quantity output by the park workshop temperature controller D1(s) at the current moment is u1(k)，Δu1(k) The total control quantity increment of a park workshop temperature controller D1(s) at the current moment; u. of1And (k-1) is the total control quantity output by the park workshop temperature D1(s) at the last sampling moment.
5. The cooperative control system for a plurality of refrigeration units of an energy station as recited in claim 1, wherein: the range controller (111) of the refrigerator (11) calculates the control amount thereof by using the following equation:
wherein u isjs(k) The set values of the backwater temperature distributed by the coordinated control method of a plurality of refrigerators (11), j being 1 … n corresponds to 1 to n refrigerators (11), PVT2(k) is the measured value of the backwater temperature of the refrigerator (11), ej2(k) Deviation of set value and measured value of backwater temperature at current sampling moment, ej2(k-1) is the deviation between the set value of the return water temperature and the measured value at the last sampling moment; kPj2And TIj2For control of a split-range controller (111)Parameter, wherein KPj2Is a proportionality coefficient, TIj2Is the integration time; t isS2Sampling period of the split-range controller;
the control quantity output by the current time split range controller (111) is uj2(k)，Δuj2(k) The control quantity increment of the split range controller (111) at the current moment is obtained; u. ofj2And (k-1) is the control quantity output by the split-range controller (111) at the last sampling moment.
6. The cooperative control system for a plurality of refrigeration units of an energy station as recited in claim 5, wherein: setting the total control quantity output by the park workshop temperature controller D1(s) at the current moment as u1(k)，u1(k) Is 100%, i.e. u1max＝100％；
The maximum set values of the control amounts of the range controllers (111) of the refrigerators (11) are u1s,u2s,u3s…unsAnd satisfies the following constraint relationship:
u1s+u2s+u3s+…+uns＝u1max＝100％；
the number of refrigerators (11) arranged in the energy station (1) is n, and the control quantities acting on each refrigerator (11) are respectively: u. of1s(k),u2s(k),u3s(k)…uns(k) And satisfies the following constraint relationship:
u1s(k)+u2s(k)+u3s(k)+…+uns(k)＝u1(k)；
according to the algorithm, the method further comprises the following steps:
when u is1(k)≤u1sWhile the first refrigerating machine (11) is running at u1s(k)＝u1(k) Carrying out automatic speed change control on a set value;
when u is1s＜u1(k)≤u1s+u2sWhen the first refrigerating machine (11) is operating at full load, the second refrigerating machine (11) is operating at u2s(k)＝u1(k)-u1sCarrying out automatic speed change control;
when u is1s+u2s＜u1(k)≤u1s+u2s+u3sIn the meantime, the first and second refrigerators (11) are operated at full load, and the third refrigerator (11) is operated at u3s(k)＝u1(k)-u1s-u2sCarrying out automatic speed change control;
and the like, so that the cooperative control of the n refrigerators (11) of the energy station (1) is realized.
7. The cooperative control system for a plurality of refrigeration units of an energy station as recited in claim 6, wherein: the park workshop temperature controller D1(s) is one work period T at intervalsWThereafter, the yard shop temperature controller D1(s) controls the adjacent refrigerators (11) to cycle in sequence in the above-described manner.
8. The cooperative control system for a plurality of refrigeration units of an energy station as recited in claim 1, wherein: the industrial park workshop (2) is provided with at least two workshop inner spaces (23), each workshop inner space (23) is internally provided with a cooling device (211) and an inner space temperature sensor (221), and all the cooling devices (211) are connected in parallel to form the cooling system (21); all the interior space temperature sensors (221) are connected to the campus plant temperature controller D1(s);
the energy station (1) is further provided with an auxiliary refrigerating machine (15), the auxiliary refrigerating machine (15) is provided with an auxiliary controller (151), the auxiliary controller (151) is connected with a park workshop temperature controller D1(s), an inlet of the auxiliary refrigerating machine (15) is connected with the tail end of a water return pipeline (13), an auxiliary water inlet pipeline (16) penetrates through the water inlet pipeline (12), and the head end of the auxiliary water inlet pipeline (16) penetrates out of the head end of the water inlet pipeline (12) to be connected with an outlet of the auxiliary refrigerating machine (15); the tail end of the auxiliary water inlet pipeline (16) is connected with a branch water pipe (161) corresponding to the cooling device (211), and the branch water pipe (161) is connected to the inlet of the corresponding cooling device (211);
the tail end of the branch water pipe (161) is provided with an electromagnetic valve (17), and the electromagnetic valve (17) is connected with a park workshop temperature controller D1(s).
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| CN202338984U (en) * | 2011-12-05 | 2012-07-18 | 龙创信恒（北京）科技有限公司 | Energy-saving system of central air conditioner |
| CN105066342B (en) * | 2015-07-31 | 2017-10-20 | 新智能源系统控制有限责任公司 | Suitable for the vari- able flow control system of air-conditioning Variable flow system |
| CN108120191B (en) * | 2017-12-18 | 2020-06-19 | 新智能源系统控制有限责任公司 | Advanced control system and method for cooling unit for realizing demand side response |
| CN208025747U (en) * | 2017-12-31 | 2018-10-30 | 宁波诚何机电有限公司 | Central air conditioning water system variable-flow active energy-saving self-controlling system |
| CN108662735B (en) * | 2018-05-29 | 2020-09-11 | 广州大学 | Energy-saving optimization control system and method for terminal equipment of central air-conditioning system |
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