CN110930046A - Heat supply unit deep peak regulation control strategy and system thereof - Google Patents
Heat supply unit deep peak regulation control strategy and system thereof Download PDFInfo
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Abstract
The invention relates to a heat supply unit deep peak regulation control strategy, which is characterized in that: the method comprises the following steps of 1, determining the heat-electricity load relation of a heat supply unit, and determining the heat-electricity parameters of typical working conditions; 2, establishing an electric load-heat load-room temperature model by using the whole heat supply network system as an object and adopting a lumped parameter method; and 3, establishing a deep peak regulation control strategy of the heat supply unit by taking the room temperature of a hot user as a control target and adopting a heat-electricity load time-staggered mutual-assistance principle. The invention also provides a system for realizing the strategy, and the invention utilizes the characteristics of large delay, large inertia and large heat storage of the heat supply network system to excavate the peak regulation capacity of the heat supply unit to realize the optimal allocation of resources.
Description
Technical Field
The invention belongs to the field of thermal power generation equipment, and particularly relates to a deep peak regulation control strategy and a system thereof for a heat supply unit.
Background
The peak-valley difference of a power grid is gradually increased due to an electricity utilization structure in China, the peak-valley difference rate of some power grids reaches 30% -40%, clean energy equipment such as wind power and the like keeps rapid growth along with the increasing prominence of ecological environment, particularly haze weather and other problems in recent years, but the wind power has high power randomness, high volatility and even reverse peak regulation characteristics, meanwhile, a heat supply unit in the northern area is rapidly developed to occupy higher and higher proportion, and the peak regulation range of the heat supply unit under the heat-fixed electricity heating working condition is greatly reduced compared with that of a unit under a pure condensation working condition. These all cause the electric wire netting to adjust the peak difficulty especially in winter heating period wind-force output maximum period, therefore improve the electric wire netting especially the degree of depth peak regulation ability of heat supply unit, increase the peak regulation capacity of electric wire netting, reduce until eliminating the wind phenomenon of abandoning has become the problem that the solution is needed badly.
At present, the research in the field is mainly based on the boundary conditions of constant environmental temperature, variable quantity of heat supply load of a given unit, empirical values of characteristic parameters of a heat supply network and the like to perform steady-state calculation of the heat supply network, and the steady-state calculation is not consistent with the time-varying characteristic of the actual boundary conditions and the dynamic characteristic of the thermodynamic process, a specific control process is not provided, and the practicability and the operability are poor.
Disclosure of Invention
The invention aims to provide a heat supply unit deep peak regulation control strategy and a system thereof, and improve the level of power grid peak regulation.
In order to achieve the purpose, the technical scheme of the invention comprises the following steps: which comprises the following steps:
(1) determining the heat-electricity load relation of a heat supply unit and determining the heat-electricity parameters of typical working conditions;
(2) establishing an electric load-heat load-room temperature model by using the whole heat supply network system as an object and adopting a lumped parameter method;
(3) and (3) taking the room temperature of a hot user as a control target, and establishing a deep peak regulation control strategy of the heat supply unit by adopting a heat-electricity load time-staggered mutual-assistance principle.
Further, in the step (1), the method for determining the heat-electricity load relationship of the heat supply unit comprises the following steps: the minimum steam inlet flow limited by the low-pressure cylinder of the steam turbine is taken as a constraint, and the minimum electric load of the heat supply unit under different heat loads is obtained by combining a design working condition diagram with a field test, so that the heat-electric load relation of the heat supply unit is determined;
the thermo-electric parameters for a typical operating regime are: room temperature stable at maximum room temperature Tn-maxRequired thermal load QTn-maxAnd its corresponding minimum electrical load, room temperature stable at minimum room temperature Tn-minRequired thermal load QTn-minAnd the minimum electric load extreme value P of the unit corresponding to the minimum electric loadminAnd its corresponding thermal load Qpmin。
Further, in the step (2), the heat supply network system comprises a heat supply network heat exchanger, a water supply and return pipeline and a heat user whole system; the heat absorption and the heat release among all the parts are not considered as the internal energy conversion of the system, and only the heat supply of a unit, the heat storage of a heat supply network system and the heat dissipation to the environment are considered;
the lumped parameter method is to take heat storage and radiation elements as mass points with uniformly distributed temperature.
Further, in the step (2), the method for establishing the electric load-thermal load-room temperature model comprises the following steps:
with thermal load Q of the unitinAnd the ambient temperature TwAs model input quantity, with hot user room temperature TnTo output, the mathematical description is:
in the formula: t isnRoom temperature, Q, for hot usersinThe heat load of the unit, K is the reciprocal of the heat dissipation thermal resistance, M is the heat storage coefficient of the heat capacity of the heat supply network system, tau is the time delay from the unit to the heat user of the heat load, TwIs the ambient temperature, s is the laplace operator. Wherein T isn、Qin、TwIs a variable, K, M, τ isA constant value.
Further, the method for acquiring each parameter in the mathematical description formula is as follows:
τ is equal to the feed water pipe length divided by the feed water flow rate;
at ambient temperature TwTime-modulated thermal load QinMake the indoor temperature TnIs stable and unchanged, then
K＝Qin×h/(Tn-Tw) (ii) a Wherein h is the enthalpy difference between the heating extraction steam and the condensed water.
M is: stopping heat supply load, measuring the time variation data of room temperature, and Q in modelinM is obtained by least square method identification at room temperature obtained from 0 step to-1.
Further, in the step (3), the heat supply unit depth peak regulation control strategy is as follows: the control process is divided into three periods: heat accumulation, deep peak regulation and recovery time periods;
regulating thermal load QinMonitoring user indoor temperature T simultaneouslynAnd enabling each time interval to satisfy the following contents and calculating the time length of each time interval by using the model:
the heat storage period is as follows: make Qin≥QTn-maxFinally, the room temperature rises to Tn-maxAnd is stable;
the peak regulation period is as follows: make Qin＝Qp-minThe unit electrical load is Pmin，
A recovery period: make Qin≥QTn-minThe electrical load of the unit is more than or equal to QTn-minCorresponding to minimum electric load, the room temperature is reduced to Tn-minThen rising again.
Further, in the step (3), the duration of each time period in the three time periods is obtained; and determining the maximum output time of the new energy unit and the minimum load time of the power grid as the deep peak regulation time of the heat supply unit according to the power dispatching plan, and determining the initial time of the control process according to the time length of each time interval.
Further, said Tn-max、Tn-minAccording to the indoor calculation temperature regulation of the main rooms of the civil buildings in the design Specification for heating, ventilation and air conditioning (GB 50019-2003), respectively taking the temperature of 24℃,16℃。
The invention also provides a system for realizing the deep peak regulation control strategy of the heat supply unit, which comprises terminal equipment integrated in the DCS system of the unit or independently configured with input/output, storage and processing functions.
Further, the terminal equipment comprises an input/output module, a parameter setting module and a calculation control module.
The input of the input/output module comprises a heat load, an electric load, a heat user room temperature and an ambient temperature, and the output of the input/output module comprises a heat load heat supply adjusting valve opening instruction and an electric load adjusting valve opening instruction;
the parameter setting module is used for setting relationship calculation and required parameters thereof, including calculation of a heat-electricity load relationship, heat-electricity parameters of typical working conditions and an electricity load-heat load-room temperature model;
the calculation control module is used for calculating the time length of the heat accumulation period, the deep peak regulation period and the recovery period and the control requirement to be met, sending an instruction for adjusting the electricity load and the heat load, changing the electricity load and the heat load of the unit by adjusting the heat supply adjusting door and the adjusting valve, and performing the deep peak regulation under the condition of meeting the room temperature.
The invention has the following positive effects:
the invention utilizes the characteristics of large delay, large inertia and large heat storage of the heat supply network system, excavates the peak regulation capacity of the heat supply unit to realize the optimized allocation of resources, realizes the staggered mutual assistance and decoupling operation of thermoelectric load, realizes the coordination control of the power grid and the heat supply network, improves the power grid regulation capacity and the new energy consumption capacity, is beneficial to the strategic deployment of energy structures and ecological environments in China, and has better social benefit and economic benefit.
Drawings
FIG. 1 is a graph of the minimum electrical load for different thermal loads of example 1;
FIG. 2 is a schematic diagram of an actual connection relationship of a heat supply network system;
FIG. 3 is a schematic diagram of a model of an electric load-thermal load-room temperature model heat supply network system established by the present invention;
FIG. 4 is a schematic diagram of an adjusting process of a heat supply unit depth peak regulation control strategy in three periods;
Detailed Description
The invention provides a heat supply unit deep peak regulation control strategy, which comprises the following steps,
(1) determining the heat-electricity load relation of a heat supply unit and determining the heat-electricity parameters of typical working conditions;
(2) establishing an electric load-heat load-room temperature model by using the whole heat supply network system as an object and adopting a lumped parameter method;
(3) and (3) taking the room temperature of a hot user as a control target, and establishing a deep peak regulation control strategy of the heat supply unit by adopting a heat-electricity load time-staggered mutual-assistance principle.
Further, in the step (1), the method for determining the heat-electricity load relationship of the heat supply unit comprises the following steps: the minimum steam inlet flow limited by the low-pressure cylinder of the steam turbine is taken as a constraint, and the minimum electric load of the heat supply unit under different heat loads is obtained by combining a design working condition diagram with a field test, so that the heat-electric load relation of the heat supply unit is determined;
the thermo-electric parameters for a typical operating regime are: room temperature stable at maximum room temperature Tn-maxRequired thermal load QTn-maxAnd its corresponding minimum electrical load, room temperature stable at minimum room temperature Tn-minRequired thermal load QTn-minAnd the minimum electric load extreme value P of the unit corresponding to the minimum electric loadminAnd its corresponding thermal load Qpmin。
Further, in the step (2), the heat supply network system comprises a heat supply network heat exchanger, a water supply and return pipeline and a heat user whole system; the heat absorption and the heat release among all the parts are not considered as the internal energy conversion of the system, and only the heat supply of a unit, the heat storage of a heat supply network system and the heat dissipation to the environment are considered;
the lumped parameter method is to take heat storage and radiation elements as mass points with uniformly distributed temperature.
Further, in the step (2), the method for establishing the electric load-thermal load-room temperature model comprises the following steps:
with thermal load Q of the unitinAnd the ambient temperature TwAs model input quantity, with hot user room temperature TnFor output, mathematical tracingThe method comprises the following steps:
in the formula: t isnRoom temperature, Q, for hot usersinThe heat load of the unit, K is the reciprocal of the heat dissipation thermal resistance, M is the heat storage coefficient of the heat capacity of the heat supply network system, tau is the time delay from the unit to the heat user of the heat load, TwIs the ambient temperature, s is the laplace operator. Wherein T isn、Qin、TwK, M, τ are constants for the variables.
Further, the method for acquiring each parameter in the mathematical description formula is as follows:
τ is equal to the feed water pipe length divided by the feed water flow rate;
at ambient temperature TwTime-modulated thermal load QinMake the indoor temperature TnIs stable and unchanged, then
K＝Qin×h/(Tn-Tw) (ii) a Wherein h is the enthalpy difference between the heating extraction steam and the condensed water.
M is: stopping heat supply load, measuring the time variation data of room temperature, and Q in modelinM is obtained by least square method identification at room temperature obtained from 0 step to-1.
Further, in the step (3), the heat supply unit depth peak regulation control strategy is as follows: the control process is divided into three periods: heat accumulation, deep peak regulation and recovery time periods;
regulating thermal load QinMonitoring user indoor temperature T simultaneouslynAnd enabling each time interval to satisfy the following contents and calculating the time length of each time interval by using the model:
the heat storage period is as follows: make Qin≥QTn-maxFinally, the room temperature rises to Tn-maxAnd is stable;
the peak regulation period is as follows: make Qin＝Qp-minThe unit electrical load is Pmin，
A recovery period: make Qin≥QTn-minThe electrical load of the unit is more than or equal to QTn-minCorresponding to minimum electric load, the room temperature is reduced to Tn-minThen rising again.
Further, in the step (3), the duration of each time period in the three time periods is obtained; and determining the maximum output time of the new energy unit and the minimum load time of the power grid as the deep peak regulation time of the heat supply unit according to the power dispatching plan, and determining the initial time of the control process according to the time length of each time interval.
Further, said Tn-max、Tn-minAccording to the indoor calculation temperature regulation of the main rooms of the civil buildings in the design Specification for heating, ventilation and air conditioning (GB 50019-2003), 24 ℃ and 16 ℃ are respectively adopted.
The invention also provides a system for realizing the deep peak regulation control strategy of the heat supply unit, which comprises terminal equipment integrated in the DCS system of the unit or independently configured with input/output, storage and processing functions. Further, the terminal equipment comprises an input/output module, a parameter setting module and a calculation control module.
The input of the input/output module comprises a heat load, an electric load, a heat user room temperature and an ambient temperature, and the output of the input/output module comprises a heat load heat supply adjusting valve opening instruction and an electric load adjusting valve opening instruction;
the parameter setting module is used for setting relationship calculation and required parameters thereof, including calculation of a heat-electricity load relationship, heat-electricity parameters of typical working conditions and an electricity load-heat load-room temperature model;
the calculation control module is used for calculating the time length of the heat accumulation period, the deep peak regulation period and the recovery period and the control requirement to be met, sending an instruction for adjusting the electricity load and the heat load, changing the electricity load and the heat load of the unit by adjusting the heat supply adjusting door and the adjusting valve, and performing the deep peak regulation under the condition of meeting the room temperature.
Example 1
The 330MW steam extraction and heat supply unit is taken as an example for explanation. The indoor temperature is normal 20 ℃, the highest temperature is 24 ℃, the lowest temperature is 16 ℃, and the output of the unit is reduced in the peak regulation period by controlling the heat load so as to consume more new energy.
(1) Determining the thermal-electric load relation of the unit: the minimum electric load of the unit under different heat loads is obtained by using a heat supply design working condition diagram or a field test of the steam turbine, and the minimum electric load is shown in the following table 1.
TABLE 1
| Heat load (t/h) | Minimum electric load (MW) |
| 0 | 160 |
| 100 | 151 |
| 200 | 178 |
| 300 | 218 |
| 400 | 243 |
| 500 | 268 |
Determining the thermo-electric parameters of the typical working conditions: the heat load required for stabilizing the room temperature at 24 ℃ is 400t/h, the corresponding minimum electric load is 243MW, the heat load required for stabilizing the room temperature at 16 ℃ is 200t/h, the corresponding minimum electric load is 178MW, the heat load required for stabilizing the room temperature at 20 ℃ is 300t/h, the corresponding minimum electric load is 218MW, and the heat load of the unit reaches the minimum electric load extreme value 151MW at 100 t/h.
According to the information of the step (1) in the embodiment, the heat-electricity load relation of the heat supply unit is determined, and the attached figure 1 is a minimum electricity load curve diagram of the embodiment 1 of the invention under different heat loads.
(2) Establishing an electric load-heat load-room temperature model by using the whole heat supply network system as an object and adopting a lumped parameter method; the whole heat supply network system is shown in fig. 2, and fig. 2 shows a schematic diagram of an actual connection relationship of the heat supply network system; the connection relation among the steam turbine, the heat exchange station, the heat supply pipeline and the heat users is shown in the figure, and as can be seen from the figure, heating steam is extracted from the steam turbine and enters the heat exchange station, low-temperature water supply is heated to high temperature, high-temperature water supply is conveyed to the heat users through the heat supply pipeline, the heat dissipation enables the room temperature to rise to meet the requirement of user heating, and the low-temperature water supply with the reduced temperature is conveyed to the heat exchange station through the heat supply pipeline to absorb heat to form circulation.
An electrical load-thermal load-room temperature model is established by adopting a lumped parameter method:
constants K, M and τ in the model are obtained.
K, solving: adjusting the thermal load Q at an ambient temperature of-5 DEG CinKeeping the indoor temperature stable at 20 ℃ to obtain the final product
K＝Qin×h/(Tn-Tw)＝300×1800/3.6/(20-(-5))＝6000
Stopping heat supply load, measuring the time variation data of room temperature, and Q in modelinIdentifying at room temperature from 0 step to-1 by least square method to obtain M ═ 3 × 108。
The transmission distance of the heat supply network is 10km, the flow speed of hot water is 2.5m/s, and the tau is 1.1 h.
Changing M to 3 × 108Where K is 6000 and τ is 1.1, the formula
From this, T can be determinedn，Qin，TwThe relationship between them. FIG. 3 is a schematic diagram of an electric load-thermal load-room temperature model heat supply network system model established according to an embodiment of the present invention, and Q can be seen from FIG. 3inForming Q via a delay moduleFor supplying to，QFor supplying toAnd QPowder medicineSubtracting via an integration module to form Tn，Tn andTwsubtracting and forming Q by a proportion modulePowder medicineAnd finally, a closed loop is formed.
(3) And (3) taking the room temperature of a hot user as a control target, and establishing a deep peak regulation control strategy of the heat supply unit by adopting a heat-electricity load time-staggered mutual-assistance principle. FIG. 4 shows a schematic diagram of the regulation process of the heat supply unit depth peak regulation control strategy in three periods;
specifically, the heat storage period: adjust to Qin≥QTn-maxThe room temperature was raised from 20 ℃ to 24 ℃ at 400t/h, and the heat-storage time was calculated according to the model to be 4 h. As shown at times t 1-t 2. the thermal load was adjusted starting at time t1, and the room temperature started to rise after time τ due to the propagation distance and finally reached 24 ℃ at time t 2.
The peak regulation period is as follows: make Qin＝Qp-min100t/h, the unit electrical load is PminWhen the peak load is 151M, reducing the room temperature from 24 ℃ to 17 ℃ at the final moment, and calculating according to a model to obtain the peak load regulation time length of 5 h; as shown in the figure, the heat load is adjusted from t2 to t4 at t2, the room temperature begins to drop after a time tau due to the outgoing distance, namely at t3, and finally reaches 17 ℃ at t 4.
A recovery period: make Qin≥QTn-min200t/h, the electric load of the unit is more than or equal to QTn-minCorresponding minimum electrical load. As shown, the thermal load is adjusted at time t4, and the room temperature starts to rise again after the temperature drops to the minimum 16 ℃ after time t5, which is the transmission distance.
And determining the maximum output of the new energy unit and the minimum load time of the power grid as the deep peak regulation time of the heat supply unit according to the power dispatching plan, starting heat accumulation 4h before peak regulation, increasing the room temperature from 20 ℃ to 24 ℃, starting peak regulation for 5h, and then recovering. The wind power absorption capacity of 178-.
The invention also provides a hardware system for realizing the deep peak regulation control strategy of the heat supply unit, namely the invention also provides a system for the deep peak regulation control strategy, which comprises terminal equipment integrated in the DCS system of the unit or independently configured with input/output, storage and processing functions.
The terminal equipment comprises an input/output module, a parameter setting module and a calculation control module.
The input of the input/output module comprises a heat load, an electric load, a heat user room temperature and an ambient temperature, and the output of the input/output module comprises a heat load heat supply adjusting valve opening instruction and an electric load adjusting valve opening instruction;
the parameter setting module is used for setting parameters required by the calculation control module, and the parameters comprise heat-electricity parameters of typical working conditions and model parameters of electric load-heat load-room temperature;
the calculation control module is used for calculating the time length of the heat accumulation and deep peak regulation time period and the control requirement to be met, sending an instruction for adjusting the electricity and heat loads, changing the electricity and heat loads of the unit by adjusting the heat supply adjusting door and the adjusting valve, and performing deep peak regulation under the condition of meeting the room temperature.
When the system is used, the modules are matched with each other, the input module is used for receiving signals of heat load, electric load, heat user room temperature and ambient temperature and then transmitting the information to the calculation control module, the parameter setting module is used for setting parameters required by the calculation control module, including heat-electricity parameters of typical working conditions and electric load-heat load-room temperature model parameters, by the parameter setting module after required constant parameters are manually input, and then the information is transmitted to the calculation control module. The calculation control module calculates the time length of the heat accumulation and deep peak regulation time period and the control requirement required to be met according to the information transmitted by the input module and the parameter setting module, sends an instruction for adjusting the electricity and heat loads, adjusts a heat supply adjusting door and a heat adjusting valve through the output module to change the electricity and heat loads of the unit, and performs deep peak regulation under the condition of meeting the room temperature, so that the implementation of the deep peak regulation control strategy of the heat supply unit is realized.
The invention utilizes the characteristics of large delay, large inertia and large heat storage of the heat supply network system, excavates the peak regulation capacity of the heat supply unit to realize the optimized allocation of resources, realizes the staggered mutual assistance and decoupling operation of thermoelectric load, realizes the coordination control of the power grid and the heat supply network, improves the power grid regulation capacity and the new energy consumption capacity, is beneficial to the strategic deployment of energy structures and ecological environments in China, and has better social benefit and economic benefit.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a heat supply unit degree of depth peak regulation control strategy which characterized in that: which comprises the following steps of,
(1) determining the heat-electricity load relation of a heat supply unit and determining the heat-electricity parameters of typical working conditions;
(2) establishing an electric load-heat load-room temperature model by using the whole heat supply network system as an object and adopting a lumped parameter method;
(3) and (3) taking the room temperature of a hot user as a control target, and establishing a deep peak regulation control strategy of the heat supply unit by adopting a heat-electricity load time-staggered mutual-assistance principle.
2. A heating unit deep peak shaving control strategy according to claim 1, characterized in that: in the step (1), the method for determining the heat-electricity load relation of the heat supply unit comprises the following steps: the minimum steam inlet flow limited by the low-pressure cylinder of the steam turbine is taken as a constraint, and the minimum electric load of the heat supply unit under different heat loads is obtained by combining a design working condition diagram with a field test, so that the heat-electric load relation of the heat supply unit is determined;
the thermo-electric parameters for a typical operating regime are: room temperature stable at maximum room temperature Tn-maxRequired thermal load QTn-maxAnd its corresponding minimum electrical load, room temperature stable at minimum room temperature Tn-minRequired thermal load QTn-minAnd the minimum electric load extreme value P of the unit corresponding to the minimum electric loadminAnd its corresponding thermal load Qpmin。
3. A heating unit deep peak shaving control strategy according to claim 1, characterized in that: in the step (2), the heat supply network system comprises a heat supply network heat exchanger, a water supply and return pipeline and a heat user whole system; the heat absorption and the heat release among all the parts are not considered as the internal energy conversion of the system, and only the heat supply of a unit, the heat storage of a heat supply network system and the heat dissipation to the environment are considered;
the lumped parameter method is to take heat storage and radiation elements as mass points with uniformly distributed temperature.
4. A heating unit deep peak shaving control strategy according to claim 1, characterized in that: in the step (2), the method for establishing the electric load-thermal load-room temperature model comprises the following steps:
with thermal load Q of the unitinAnd the ambient temperature TwAs model input quantity, with hot user room temperature TnTo output, the mathematical description is:
in the formula: t isnRoom temperature, Q, for hot usersinThe heat load of the unit, K is the reciprocal of the heat dissipation thermal resistance, M is the heat storage coefficient of the heat capacity of the heat supply network system, tau is the time delay from the unit to the heat user of the heat load, TwIs the ambient temperature, s is the laplace operator. Wherein T isn、Qin、TwK, M, τ are constants for the variables.
5. A heating unit deep peak shaving control strategy according to claim 4, wherein the method for obtaining each parameter in the mathematical description formula is as follows:
τ is equal to the feed water pipe length divided by the feed water flow rate;
at ambient temperature TwTime-modulated thermal load QinMake the indoor temperature TnIs stable and unchanged, then
K＝Qin×h/(Tn-Tw) (ii) a Wherein h is the enthalpy difference between the heating extraction steam and the condensed water.
M is: stopping heat supply load, measuring the time variation data of room temperature, and Q in modelinM is obtained by least square method identification at room temperature obtained from 0 step to-1.
6. A heating unit deep peak shaving control strategy according to claim 1, characterized in that: in the step (3), the heat supply unit depth peak regulation control strategy is as follows: the control process is divided into three periods: heat accumulation, deep peak regulation and recovery time periods;
regulating thermal load QinMonitoring user indoor temperature T simultaneouslynAnd enabling each time interval to meet the following contents and calculating the duration of the heat accumulation and peak regulation time intervals by utilizing a model:
the heat storage period is as follows: make Qin≥QTn-maxFinally, the room temperature rises to Tn-maxAnd is stable;
the peak regulation period is as follows: make Qin＝Qp-minThe unit electrical load is Pmin，
A recovery period: make Qin≥QTn-minThe electrical load of the unit is more than or equal to QTn-minCorresponding to minimum electric load, the room temperature is reduced to Tn-minThen rising again.
7. A heating unit deep peak shaving control strategy according to claim 6, characterized in that: in the step (3), the duration of each time period in the three time periods is obtained; and determining the maximum output time of the new energy unit and the minimum load time of the power grid as the deep peak regulation time of the heat supply unit according to the power dispatching plan, and determining the initial time of the control process according to the time length of each time interval.
8. A heating unit deep peak shaving control strategy according to claim 1, characterized in that Tn-max、Tn-minAccording to the indoor calculation temperature regulation of the main rooms of the civil buildings in the design Specification for heating, ventilation and air conditioning (GB 50019-2003), 24 ℃ and 16 ℃ are respectively adopted.
9. A system for the depth peaking control strategy of any of claims 1 to 8, wherein: the method comprises the steps of integrating in a unit DCS system or independently configuring terminal equipment with input/output, storage and processing functions.
10. The system of claim 9, wherein: the terminal equipment comprises an input/output module, a parameter setting module and a calculation control module.
The input of the input/output module comprises a heat load, an electric load, a heat user room temperature and an ambient temperature, and the output of the input/output module comprises a heat load heat supply adjusting valve opening instruction and an electric load adjusting valve opening instruction;
the parameter setting module is used for setting parameters required by the calculation control module, and the parameters comprise heat-electricity parameters of typical working conditions and model parameters of electric load-heat load-room temperature;
the calculation control module is used for calculating the time length of the heat accumulation and deep peak regulation time period and the control requirement to be met, sending an instruction for adjusting the electricity and heat loads, changing the electricity and heat loads of the unit by adjusting the heat supply adjusting door and the adjusting valve, and performing deep peak regulation under the condition of meeting the room temperature.
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