CN106524353A - Method for air-conditioner load actively controlling and participating in peak regulation of electric power - Google Patents
Method for air-conditioner load actively controlling and participating in peak regulation of electric power Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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Abstract
The invention relates to a method for an air-conditioner load actively controlling and participating in peak regulation of electric power. The method is based on thermal inertia of a building, and through the control over start-stop of an air-conditioner, active participation in the peak regulation of the electric power is achieved. The method comprises the following steps that an implement idea of the air conditioner load actively controlling and participating in the leak regulation of the electric power based on the thermal inertia of the building is put forward; thermal dynamic characteristics of a refrigerating building and a duty ratio working mode of the air-conditioner are analyzed and modeling on each of the thermal dynamic characteristics and the duty ratio working mode is conducted; and based on a thermal dynamic characteristic model of the air-conditioner refrigerating building, the air-conditioner load is subjected to coordinating control and a specific scheme of the air-conditioner load actively controlling and participating in the peak regulation of the electric power is obtained. According to the method, by reasonably controlling the air-conditioner load and the building load, dispatch of a grid side can be responded quickly, electric power demand in a peak period is reduced, and contradiction of electric power supply and demand is effectively relieved.
Description
Technical Field
The invention relates to the field of demand side response control, in particular to a method for actively controlling air conditioner load to participate in electric power peak shaving based on building thermal inertia.
Background
Conventionally, a control mode of a generator is easier than a control mode of a load, a power system load is usually considered as a passive physical terminal, a control mode of generating power and tracking load change is adopted to realize balance control of active power of the power system, and a control object is always on a power supply side. However, load variations of the power system are one of the main causes of the imbalance of the active power of the system.
With the increasing severity of the environmental pollution problem, renewable energy sources such as wind energy, solar energy and the like are vigorously developed, and the consumption and emission of fossil energy are reduced, which is a necessary trend of energy development in China. With the further development of renewable energy sources, the power generation structure of the traditional power system is changed, the proportion of the capacity of a coal burner assembling machine with high coal consumption is greatly reduced, and the proportion of the installed capacity of a clean and pollution-free wind energy, solar energy and other renewable resource generating units in the total installed capacity of the power system is greatly increased.
The power generation structure of the traditional power system is changed greatly in the new period, and the active balance control in the new period is not limited to the traditional control mode for controlling the coal-fired unit any more. The reason is as follows: on one hand, in order to improve the operation efficiency of the coal-fired unit, reduce the operation cost and reduce the emission of pollutants, the coal-fired unit develops towards a large-capacity supercritical direction, so the proportion of tracking load change and providing standby is reduced; on the other hand, due to the randomness and the volatility of the renewable energy sources, especially the reverse peak-shaving characteristic of the wind power to a certain extent, the capacity of the power supply for tracking the load change is reduced along with the increasing year by year of the installed proportion of the renewable energy sources, and meanwhile, the requirement on the standby capacity of the system is obviously improved due to the large-scale grid connection of the renewable energy sources. In summary, the conventional control method that relies on the power supply side to adjust the active balance for tracking the load changes is greatly challenged.
With the development and the perfection of the smart grid and the communication network, the controllability of the load is enhanced, the foundation for realizing active balance by the source side and the load side coordination control is laid, and the load is changed from passive control in the traditional sense into active participation in active balance control.
With the increasing national economy and the linearly rising situation of the power demand, the power supply is often in a tension state, and great challenges are brought to the active balance control of the power system. Particularly, due to frequent occurrence of extreme climate in recent years, the amount of air conditioning used is increasing year by year, and the rapid increase of air conditioning load has become a significant cause of deterioration of grid load characteristics and shortage of electric power in summer. In order to meet the increasing demand of air conditioning load, a peak shaving power plant with high cost is built, or load management measures such as switching off and electricity limiting are simply adopted for users when load peaks occur, and the requirements of form development cannot be met.
The air conditioning load, one of the temperature control loads, can convert electric energy into heat energy stored in a room, and the characteristics of energy conversion and storage make the air conditioning the load with the most demand response potential. In addition, the building enclosure structure has good heat preservation effect, the heat exchange between the indoor and the outdoor is very slow, and the building has great heat inertia. Therefore, the thermal inertia of the air conditioner and the building can be utilized, the starting and stopping time of the air conditioner is controlled in a proper mode in the load peak period on the premise of not influencing the comfort of users, and the load peak of the air conditioner is reduced.
The document "Ramanathan B, Vital V.A frame for evaluation of advanced load control with minimum deviation [ J ]. IEEE Transactions on Power systems,2008,23(4): 1681-. The document "Ruiz N, Cobelo I, Oyarzabal J.A direct load control model for virtual Power plant management [ J ]. IEEE Transactions on Power Systems,2009,24(2): 959-. The document 'high obligue, plum jade, plum blossom, DLC-based air-conditioning load double-layer optimization scheduling and control strategy [ J ]. Chinese Motor engineering Proc, 2014,34(10):1546 and 1554' considers the air-conditioning load in the economic scheduling of the power system and provides a double-layer optimization scheduling and control model aiming at the air-conditioning load. The literature 'Zhou Lei, Li Yang, Gao ciwei' polymerization air-conditioning load temperature regulation method improvement and control strategy [ J ]. Chinese Motor engineering journal, 2014,34(31): 5579-.
Therefore, it is necessary to study the thermal inertia of the building, and to properly control the air conditioning load by using the thermal inertia of the building, so as to achieve the purpose that the air conditioning load actively controls and participates in the power peak shaving.
Disclosure of Invention
According to the problems existing in the prior art, the invention discloses a method for actively controlling air conditioning load to participate in electric power peak shaving based on the thermal inertia of a building, which is based on the thermal inertia of the building and is characterized in that: the active participation in the power peak regulation is realized by controlling the starting and stopping of the air conditioner.
During the low peak period of the electric load, the air conditioner increases the starting time, and the refrigerating capacity exceeding the refrigerating requirement of the building is stored in the building; during the peak period of the electric load, the air conditioner increases the closing time, and the part which does not meet the refrigeration requirement of the building is released and compensated by the cold energy stored in the building so as to control the indoor temperature within a certain range.
The method comprises the following steps:
s1: analyzing the thermal dynamic characteristics of the air-conditioning refrigeration building and the duty ratio working mode of the air conditioner, and respectively modeling the thermal dynamic characteristics and the duty ratio working mode;
s2: and performing coordination control on the air conditioning load based on the thermal dynamic characteristic model of the air conditioning refrigeration building to obtain a specific scheme that the air conditioning load actively controls and participates in electric power peak shaving.
The step S1 specifically includes the following steps:
s21: modeling the thermal dynamic characteristics of the air-conditioning cold building, and establishing a plurality of mathematical expressions with temperature as a control variable;
s22: and analyzing the duty ratio working mode of the air conditioner to obtain the control period and the start-stop time of the duty ratio working mode.
The modeling process of the thermodynamic characteristics of the air-conditioning refrigeration building is as follows:
for the refrigerated room i at time t, the transient heat balance equation is:
(∑i,jKi,jFi,j+1000caρaGnw,i)(Tout,i,t-Tin,i,t)dt
+{∑(qf,kFc,kCs,kCn,kCcl,k)+[n1n2n3Pe,i+n4n5n6n7Pl,i+(Crnp,iφiqr+np,iφiqq)]}dt
+IidT＝Qac,i,tXi,tdt
wherein,i,jthe temperature difference correction coefficient of the j-th surface enclosure structure of the room i is obtained; ki,jThe heat transfer coefficient of the enclosure structure of the jth surface of the room i; fi,jThe area of the enclosure structure of the jth surface of the room i; t isout,i,tThe outdoor air temperature for room i at time t; t isin,i,tIs the room air temperature of room i at time t; q. q.sf,kThe maximum solar heat gain of the outer window k; fc,kIs the area of the outer window k; cs,kA glass type correction factor for the outer window k; cn,kThe shading coefficient of the inner shading of the outer window k; ccl,kThe cold load coefficient of the outer window glass of the outer window k; n is1The installation factor of the electric equipment; n is2Is the load factor of the electric equipment; n is3Simultaneous usage rate of the electrical devices; n is4The heat storage coefficient of the lighting equipment; n is5A factor of power consumed for the rectifier; n is6Is the installation factor of the lighting device; n is7Simultaneous usage of lighting devices; pe,iThe installation power of the electric equipment in the room i is obtained; pl,iInstallation power for lighting devices in room i; crThe coefficient of the sensible heat and the heat dissipation cold load of the human body is; n isp,iThe total number of people in room i; phi is aiThe heat dissipation ratio clustering coefficient for men, women and children in the room i to be converted into adult men; q. q.srSensible heat rejection for each adult man; q. q.sqLatent heat capacity for each adult male; i isiIs the total heat capacity of room i; t is a temperature variable symbol; c. CaThe constant pressure specific heat of outdoor hot air; rhoaIs outdoorsCalculating the air density at the temperature; gnw,iFresh air volume of room i; xj,tIs the air conditioner switch state variable of room j, 0 or 1; xj,t1 indicates that the air conditioner is in an on state, Xj,t0 represents that the air conditioner is in a closed state; i. j and k are natural numbers, Qac,i,τThe refrigeration capacity of the air conditioner is constant;
herein, let
Ai＝∑i,jKi,jFi,j+1000caρaGnw,i
θi,t＝Tout,i,t-Tin,i,t
Ti＝Ii/Ai
Qso,i,t＝∑(qf,kFc,kCs,kCn,kCcl,k)
Qeq,i＝[n1n2n3Pe,i+n4n5n6n7Pl,i+(Crnp,iφiqr+np,iφiqq)]
Further obtain the
Wherein, thetai,tThe relative outdoor and indoor air temperatures for room i at time t; a. theiThe heat transfer power is the unit temperature difference of the room i; t isiIs the thermal reserve coefficient for room i; xi,tIs the air conditioner on-off state variable of room i, 0 or 1; xi,t1 indicates that the air conditioner is in an on state, Xi,t0 indicates that the air conditioner is in an off state.
The method for calculating the control period and the start-stop time comprises the following steps:
setting the indoor temperature of the building to be in the range of Ti,min,Ti,max]When the air conditioner is turned on, i.e. Xi,tIn the time period of 1, the indoor temperature is controlled by Ti,maxDown to Ti,minThe time period is as follows,
when the air conditioner is turned off, i.e. Xi,tIn the time period of 0, the indoor temperature is controlled by Ti,minUp to Ti,maxThe time period is as follows,
the control period of the air conditioner is,
tc＝ton+toff；
in a control period tcThe air conditioning unit is arranged according to the constant refrigerating capacity Qac,i,tOperation tonTime and stop operation toffWorking in a duty cycle mode of time to make the indoor temperature at Ti,minAnd Ti,maxCyclically change between; t isoutIs the outdoor temperature; t isi,minIs the lowest temperature, T, of room ii,maxThe highest temperature of room i.
Due to the adoption of the technical scheme, the method for actively controlling the air conditioning load to participate in the power peak regulation based on the thermal inertia of the building, provided by the invention, has the following advantages: 1. the air conditioner load after centralized control is considerable, the dispatching mode is flexible, the potential of participating in system peak regulation is huge, and the air conditioner load is an important demand response resource of an electric power company and can be brought into normalized electric power system dispatching; 2. the building area is huge, the heat preservation effect of the enclosure structure is obvious, the thermal inertia is good, the enclosure structure is equivalent to a high-quality energy storage device, the energy storage is huge, and the investment is not needed; 3. through reasonable direct load control means, the air conditioner and the building load are reasonably controlled, the dispatching of the power grid side can be quickly responded, the power demand at the peak time period is reduced, the contradiction between power supply and demand is effectively relieved, and compared with the investment of power generation installed capacity, the cost of demand response is low, and the influence on the power utilization comfort level of a user is small.
Drawings
Figure 1 is a schematic diagram of the heat balance of an air-conditioned refrigerated building.
Fig. 2 shows the indoor temperature and the air conditioner on/off state in a certain air conditioner duty operation mode.
Fig. 3 shows the start-stop law of the air conditioner and the average power consumption of the air conditioner per hour under certain conditions.
Fig. 4 shows the indoor temperature variation law of a building and the average indoor temperature hour by hour under certain conditions.
Detailed Description
In order to make the technical solutions and advantages of the present invention clearer, the following describes the technical solutions in the embodiments of the present invention clearly and completely with reference to the drawings in the embodiments of the present invention:
a method for actively controlling air conditioning load to participate in power peak shaving based on thermal inertia of a building provides a realization idea for actively controlling air conditioning load to participate in power peak shaving based on thermal inertia of the building. The loads with energy storage characteristics, such as air conditioners, buildings and the like, are switched off or the operating parameters are changed in a short time, and the use characteristics of end users are not obviously influenced. Such loads have the potential to actively change operating conditions and actively participate in power peak shaving. The air conditioning load is a typical temperature control load, and can convert electric energy into heat energy to be stored in a room of a building, and the energy conversion characteristic enables the air conditioner to have a large demand response potential.
In addition, the building enclosure structure has good heat preservation effect, the heat exchange between the indoor and the outdoor is very slow, and the building has great heat inertia. That is to say, for the room equipped with the air conditioner, under certain outdoor temperature, after opening the air conditioner, the indoor temperature reduces gradually under the refrigeration effect of air conditioner, after the air conditioner was closed, outdoor air heat exchanged heat with the indoor air through door and window and envelope of building, the indoor air temperature rose gradually, and the process of this heat exchange is slower, therefore can utilize this kind of thermal inertia of air conditioner and building, under the prerequisite that does not influence user's travelling comfort during the peak period of load, the suitable shutdown air conditioner was for a period of time, reduces the air conditioner load peak. The active participation in the power peak regulation is realized by reasonably controlling the starting and the stopping of the air conditioner. The method comprises the following specific steps:
s1: the thermodynamic characteristics of the refrigerated building and the duty cycle operation mode of the air conditioner are analyzed and modeled respectively. The method comprises the steps of analyzing and modeling the thermal dynamic characteristics of the refrigeration building and analyzing and modeling the duty cycle working mode of the air conditioner.
1-1) modeling the thermal dynamic characteristics of the air-cooled modulated structure, and establishing a plurality of mathematical expressions with temperature as a control variable.
Fig. 1 is a schematic diagram of the heat balance of an air-conditioned refrigerated building. As can be seen from the figure, the heat balance of the air-conditioned and refrigerated building in summer is a dynamic process, wherein the cooling path of the building is the cooling capacity of the air conditioner, and the cooling path of the building is: the cooling loss caused by solar radiation, the cooling loss caused by fresh air load, the cooling loss caused by heat exchange between outdoor air and indoor air through a door and a window and a wall of a building, and the cooling loss caused by heat dissipation of indoor electric lighting equipment and a human body.
For the refrigerated room i at time t, the transient heat balance equation is:
wherein,i,jthe temperature difference correction coefficient of the j-th surface enclosure structure of the room i is obtained; ki,jThe heat transfer coefficient (W/(m) of the j surface enclosure of the room i2·℃))；Fi,jFor the area of the enclosure of the jth face of the room i (m)2)；Tout,i,tThe outdoor air temperature (° c) for room i at time t; t isin,i,tIs the indoor air temperature (deg.C) of room i at time t; q. q.sf,kIs the maximum solar heat gain (W/m) of the outer window k2)；Fc,kIs the area (m) of the outer window k2)；Cs,kA glass type correction factor for the outer window k; cn,kThe shading coefficient of the inner shading of the outer window k; ccl,kThe cold load coefficient of the outer window glass of the outer window k; n is1The installation factor of the electric equipment; n is2Is the load factor of the electric equipment; n is3Simultaneous usage rate of the electrical devices; n is4The heat storage coefficient of the lighting equipment; n is5A factor of power consumed for the rectifier; n is6Is the installation factor of the lighting device; n is7Simultaneous usage of lighting devices; pe,iThe installation power (W) of the electric equipment in the room i; pl,iInstallation power (W) for lighting devices in room i; crThe coefficient of the sensible heat and the heat dissipation cold load of the human body is; n isp,iThe total number of people in room i; phi is aiThe heat dissipation ratio clustering coefficient for men, women and children in the room i to be converted into adult men; q. q.srSensible heat rejection (W) for each adult man; q. q.sqLatent heat dissipation (W) for each adult male; i isiTotal heat capacity for room i (J/. degree. C.); t is a temperature variable symbol; c. CaThe constant pressure specific heat (kJ/(kg. DEG C)) of outdoor hot air; rhoaCalculate the air density (kg/m) at temperature for the outdoors3)；Gnw,iFresh air volume (kg/s) for room i; xj,tIs the air conditioner switch state variable of room j, 0 or 1; xj,t1 indicates that the air conditioner is in an on state, Xj,t0 indicates that the air conditioner is in an off state.
Herein, let
Ai＝∑i,jKi,jFi,j+1000caρaGnw,i(2)
θi,t＝Tout,i,t-Tin,i,t(3)
Ti＝Ii/Ai(4)
Qso,i,t＝∑(qf,kFc,kCs,kCn,kCcl,k) (5)
Qeq,i＝[n1n2n3Pe,i+n4n5n6n7Pl,i+(Crnp,iφiqr+np,iφiqq)](6)
Further obtain the
Wherein, thetai,tThe relative outdoor to indoor air temperature (deg.C) for room i at time t; a. theiHeat transfer power per temperature difference (W/DEG C) for room i; t isiIs the heat reserve coefficient(s) for room i.
Because the optimal economic dispatching model is a discretization model, assuming that the air-conditioning refrigerating capacity and the outdoor temperature are kept unchanged in each dispatching time interval, the air-conditioning refrigerating capacity and the outdoor temperature in different dispatching time intervals are possibly different, and discretizing solving is carried out on a formula (7) according to a dispatching time interval delta t to obtain:
θi,t+1＝Tout,i,t+1-Tin,i,t+1(9)
1-2) analyzing the duty ratio working mode of the air conditioner to obtain the control period and the start-stop time of the duty ratio working mode.
In the traditional sense, no matter whether the load of the power system is in the peak period or not, the user can control the on-off state of the air conditioner according to the outdoor temperature and the demand of the user, and the disordered state is presented on the whole. However, in summer, when the outdoor temperature is high, the user is in a state of turning on the air conditioner in a concentrated manner, which causes a peak in the power load of the air conditioner. If the thermal inertia of the building is utilized and the dispersed air conditioner load is controlled in a centralized manner, the indoor temperature of the building can be changed within a certain range under the condition that the comfort degree of a user is not influenced, the air conditioner can be properly started for a long time in the low-peak period of the electric load, and the refrigerating capacity exceeding the refrigerating requirement of the building can be stored in the building; during the peak period of electric load, the air conditioner can properly increase the closing time, and the part which does not meet the refrigeration requirement of the building can be released and compensated by the cold energy stored in the building so as to control the indoor temperature within a certain range.
Setting the indoor temperature of the building to be in the range of Ti,min,Ti,max]When the air conditioner is turned on, i.e. Xi,τIn the time period of 1, the indoor temperature is controlled by Ti,maxDown to Ti,minThe period of time is
When the air conditioner is turned off, i.e. Xi,τIn the time period of 0, the indoor temperature is controlled by Ti,minUp to Ti,maxThe period of time is
The control period of the air conditioner is
tc＝ton+toff(12)
As shown in fig. 2, the indoor temperature and the air conditioner on/off state in a certain air conditioner duty operation mode are shown. When the air conditioner is started, the indoor temperature is gradually reduced; when the air conditioner is turned off, the indoor temperature gradually rises. In a control period tcThe air conditioning unit is arranged according to the constant refrigerating capacity Qac,i,tOperation tonTime and stop operation toffWhen the air conditioner works in a time duty ratio mode, the indoor temperature can be enabled to be Ti,minAnd Ti,maxThe temperature range is properly controlled without influencing the comfort of users.
S2: based on the thermal dynamic characteristic model of the air-conditioning refrigeration building, the air-conditioning load is coordinated and controlled, and a specific scheme that the air-conditioning load actively controls and participates in electric power peak shaving is obtained.
As shown in fig. 3 and 4, the air conditioner start-stop rule, the hourly average power consumption of the air conditioner, the indoor temperature variation rule of the building, and the hourly average indoor temperature are respectively set under certain conditions. As can be seen from the two figures, the indoor temperature is changed back and forth in the range of the maximum allowable temperature and the minimum allowable temperature by reasonably controlling the start and stop of the air conditioner. Generally, there are two peak periods of electric load in summer, and the air conditioning load can be orderly controlled based on the thermal inertia of the building in each peak period, and then an average value is obtained for the corresponding scheduling period, so as to obtain the average power consumption of the air conditioning load and the average indoor temperature of the rooms of the building in each scheduling period in the peak period. Through the ordered control, the indoor temperature is not maintained at the lowest temperature meeting the comfort level of human bodies any more in the peak period of the electric load, but has a certain fluctuation range, so that the total load of the air conditioner is reduced in the peak period of the electric load, and the peak of the electric load caused by centralized power utilization of the air conditioner is relieved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. A method for actively controlling the participation of air conditioning load in power peak shaving is based on the thermal inertia of a building, and is characterized in that: the active participation in the power peak regulation is realized by controlling the starting and stopping of the air conditioner.
2. The method of claim 1, wherein during low peak periods of the electrical load, the air conditioner increases the turn-on time, and the cooling capacity exceeding the cooling demand of the building is stored in the building; during the peak period of the electric load, the air conditioner increases the closing time, and the part which does not meet the refrigeration requirement of the building is released and compensated by the cold energy stored in the building so as to control the indoor temperature within a certain range.
3. A method for actively controlling participation in electric power peak shaving of an air conditioning load according to claim 1 or 2, characterized in that it comprises the following steps:
s1: analyzing the thermal dynamic characteristics of the air-conditioning refrigeration building and the duty ratio working mode of the air conditioner, and respectively modeling the thermal dynamic characteristics and the duty ratio working mode;
s2: and performing coordination control on the air conditioning load based on the thermal dynamic characteristic model of the air conditioning refrigeration building to obtain a specific scheme that the air conditioning load actively controls and participates in electric power peak shaving.
4. The method for actively controlling participation in electric power peak shaving of air conditioning load as claimed in claim 3, wherein said step S1 specifically includes the following steps:
s21: modeling the thermal dynamic characteristics of the air-conditioning cold building, and establishing a plurality of mathematical expressions with temperature as a control variable;
s22: and analyzing the duty ratio working mode of the air conditioner to obtain the control period and the start-stop time of the duty ratio working mode.
5. The method for actively controlling participation in electric peak shaving of air conditioning load as claimed in claim 4, wherein said modeling process of thermodynamic characteristics of air conditioning refrigeration building is as follows:
for the refrigerated room i at time t, the transient heat balance equation is:
wherein,i,jthe temperature difference correction coefficient of the j-th surface enclosure structure of the room i is obtained; ki,jThe heat transfer coefficient of the enclosure structure of the jth surface of the room i; fi,jIs a roomThe area of the jth surface enclosing structure; t isout,i,tThe outdoor air temperature for room i at time t; t isin,i,tIs the room air temperature of room i at time t; q. q.sf,kThe maximum solar heat gain of the outer window k; fc,kIs the area of the outer window k; cs,kA glass type correction factor for the outer window k; cn,kThe shading coefficient of the inner shading of the outer window k; ccl,kThe cold load coefficient of the outer window glass of the outer window k; n is1The installation factor of the electric equipment; n is2Is the load factor of the electric equipment; n is3Simultaneous usage rate of the electrical devices; n is4The heat storage coefficient of the lighting equipment; n is5A factor of power consumed for the rectifier; n is6Is the installation factor of the lighting device; n is7Simultaneous usage of lighting devices; pe,iThe installation power of the electric equipment in the room i is obtained; pl,iInstallation power for lighting devices in room i; crThe coefficient of the sensible heat and the heat dissipation cold load of the human body is; n isp,iThe total number of people in room i; phi is aiThe heat dissipation ratio clustering coefficient for men, women and children in the room i to be converted into adult men; q. q.srSensible heat rejection for each adult man; q. q.sqLatent heat capacity for each adult male; i isiIs the total heat capacity of room i; t is a temperature variable symbol; c. CaThe constant pressure specific heat of outdoor hot air; rhoaCalculating the air density at the outdoor temperature; gnw,iFresh air volume of room i; xj,tIs the air conditioner switch state variable of room j, 0 or 1; xj,t1 indicates that the air conditioner is in an on state, Xj,t0 represents that the air conditioner is in a closed state; i. j and k are natural numbers, Qac,i,tThe refrigeration capacity of the air conditioner is constant;
herein, let
Ai＝∑i,jKi,jFi,j+1000caρaGnw,i
θi,t＝Tout,i,t-Tin,i,t
Ti＝Ii/Ai
Qso,i,t＝∑(qf,kFc,kCs,kCn,kCcl,k)
Qeq,i＝[n1n2n3Pe,i+n4n5n6n7Pl,i+(Crnp,iφiqr+np,iφiqq)]
Further obtain the
Wherein, thetai,tThe relative outdoor and indoor air temperatures for room i at time t; a. theiThe heat transfer power is the unit temperature difference of the room i; t isiIs the thermal reserve coefficient for room i; xi,tIs the air conditioner on-off state variable of room i, 0 or 1; xi,t1 indicates that the air conditioner is in an on state, Xi,t0 indicates that the air conditioner is in an off state.
6. The method for actively controlling participation in electric power peak shaving of air conditioning load as claimed in claim 5, wherein the calculation method of the control period and the start-stop time is as follows:
setting the indoor temperature of the building to be in the range of Ti,min,Ti,max]When the air conditioner is turned on, i.e. Xi,tIn the time period of 1, the indoor temperature is controlled by Ti,maxDown to Ti,minThe time period is as follows,
when the air conditioner is turned off, i.e. Xi,tIn the time period of 0, the indoor temperature is controlled by Ti,minUp to Ti,maxThe time period is as follows,
the control period of the air conditioner is,
tc＝ton+toff；
in a control period tcThe air conditioning unit is arranged according to the constant refrigerating capacity Qac,i,tOperation tonTime and stop operation toffWorking in a duty cycle mode of time to make the indoor temperature at Ti,minAnd Ti,maxCyclically change between; t isoutIs the outdoor temperature; t isi,minIs the lowest temperature, T, of room ii,maxThe highest temperature of room i.
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| CN107423915A (en) * | 2017-08-07 | 2017-12-01 | 东北电力大学 | Family electricity consumption heating load adjustability appraisal procedure based on numerical weather forecast |
| CN108023409A (en) * | 2017-12-20 | 2018-05-11 | 中国电建集团河南省电力勘测设计院有限公司 | A kind of household electrical appliance demand response control device and control method |
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| CN109899930A (en) * | 2019-01-29 | 2019-06-18 | 国家电网有限公司 | Extensive public building central air-conditioning participates in the combinatorial regulation method of peak load regulation network |
| CN111928428A (en) * | 2020-08-07 | 2020-11-13 | 长安大学 | Control method of air conditioning system considering demand response and refrigeration system |
| CN113028604A (en) * | 2020-12-04 | 2021-06-25 | 国家电网有限公司 | Temperature regulation control and scheduling method based on aggregated air conditioner |
| CN113177321A (en) * | 2021-05-10 | 2021-07-27 | 合肥工业大学 | Air conditioner load modeling method based on heat exchange dynamic process |
| CN114198887A (en) * | 2021-12-22 | 2022-03-18 | 杭州电力设备制造有限公司 | Air conditioner regulation and control method, device and system and intelligent sensing switch |
| CN117346287A (en) * | 2023-12-04 | 2024-01-05 | 清华大学 | Method and device for controlling fresh air quantity of building air conditioner, electronic equipment and storage medium |
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| CN107169606A (en) * | 2017-05-18 | 2017-09-15 | 天津大学 | A kind of Forecasting Methodology of office building refrigeration duty |
| CN107423915B (en) * | 2017-08-07 | 2020-09-08 | 东北电力大学 | Household electric heating load adjustability assessment method based on numerical weather forecast |
| CN107423915A (en) * | 2017-08-07 | 2017-12-01 | 东北电力大学 | Family electricity consumption heating load adjustability appraisal procedure based on numerical weather forecast |
| CN108023409A (en) * | 2017-12-20 | 2018-05-11 | 中国电建集团河南省电力勘测设计院有限公司 | A kind of household electrical appliance demand response control device and control method |
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| CN109899930A (en) * | 2019-01-29 | 2019-06-18 | 国家电网有限公司 | Extensive public building central air-conditioning participates in the combinatorial regulation method of peak load regulation network |
| CN111928428A (en) * | 2020-08-07 | 2020-11-13 | 长安大学 | Control method of air conditioning system considering demand response and refrigeration system |
| CN111928428B (en) * | 2020-08-07 | 2021-09-14 | 长安大学 | Control method of air conditioning system considering demand response and refrigeration system |
| CN113028604A (en) * | 2020-12-04 | 2021-06-25 | 国家电网有限公司 | Temperature regulation control and scheduling method based on aggregated air conditioner |
| CN113177321A (en) * | 2021-05-10 | 2021-07-27 | 合肥工业大学 | Air conditioner load modeling method based on heat exchange dynamic process |
| CN113177321B (en) * | 2021-05-10 | 2022-10-04 | 合肥工业大学 | Air conditioner load modeling method based on heat exchange dynamic process |
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