CN115325666A - Air conditioner response capability assessment method and device based on LSTM and heat storage mechanism - Google Patents
Air conditioner response capability assessment method and device based on LSTM and heat storage mechanism Download PDFInfo
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Abstract
The invention relates to the technical field of power systems, and discloses an air conditioner response capacity evaluation method and device based on an LSTM and a heat storage mechanism, wherein the technical scheme is characterized by comprising the following steps of: according to the heat storage mechanism of the air conditioner, an air conditioner heat energy conversion efficiency model is constructed, and the conversion efficiency between the heat stored in the heat exchange process of the air conditioner and the consumed electric energy is obtained; constructing an average power range evaluation model; according to the historical controllable air conditioner quantity data and the LSTM, constructing a controllable air conditioner quantity prediction model based on the LSTM; according to the average maximum power and the average minimum of a single air conditioner in one operation periodPower, predicted next timeThe number of controllable air conditioners capable of participating in load adjustment and a load aggregation quotient are used for constructing an air conditioner load maximum and minimum response capability evaluation model based on the load aggregation quotient, and the air conditioner load maximum and minimum response capability under the control of the load aggregation quotient is evaluated and obtained.
Description
Technical Field
The invention relates to the technical field of power systems, in particular to an air conditioner response capacity evaluation method and device based on an LSTM and a heat storage mechanism.
Background
Along with the development of low-carbon energy, the power grid is changed to a novel power system taking new energy as a main body, the novel power system faces the impact of variable operation modes of a power supply side and multiple energy sources and loads inside a load side in a normalized mode, the peak-valley difference or the peak-valley number of the net demand of the novel power system is increased possibly, indexes such as the peak-valley regulation amplitude, the frequency and the span of the power grid are increased rapidly, and higher requirements are provided for the dispatching capacity of the power grid.
The power grid can regulate resource shortage, and needs to excavate load side resources to participate in power grid dispatching and support power grid day-to-day operation plan correction. In recent years, with the change of global climate and the improvement of the requirement of people on comfort level, the air conditioning load is rapidly increased, the urban air conditioning load is rapidly increased, in summer, part of the urban air conditioning load is as high as 40% of the power consumption of the whole society, the essence of air conditioning operation is the process of converting electric energy into heat energy, the heat energy has thermal inertia, a human body has a certain range on the comfort level and a certain range on the demand of the heat energy, the consumption of the electric energy can be adjusted by utilizing the thermal inertia of the heat energy, such as early refrigeration and late refrigeration, and the heat energy is kept within a certain range, so that the adjustment of the electric energy is realized, and the air conditioning load has a larger adjusting space. The day-to-day adjustment response capability of the air conditioner is evaluated, and the method has important significance for supporting power grid dispatching and correcting day-to-day operation plans.
Disclosure of Invention
The invention aims to provide an air conditioner response capacity evaluation method and device based on an LSTM and a heat storage mechanism, which can effectively evaluate the air conditioner load response capacity of a load aggregator and master the upper and lower limit values of the air conditioner load power of the load aggregator.
The technical purpose of the invention is realized by the following technical scheme: the air conditioner response capacity evaluation method based on the LSTM and the heat storage mechanism comprises the following steps:
according to the heat storage mechanism of the air conditioner, an air conditioner heat energy conversion efficiency model is constructed, and the conversion efficiency between the heat stored in the heat exchange process of the air conditioner and the consumed electric energy is obtained;
according to the conversion efficiency between the heat stored and the consumed electric energy in the heat exchange process of the air conditioner, an average power range evaluation model is constructed to obtain the average maximum power and the average minimum power of a single air conditioner in one operation period;
according to the historical controllable air conditioner quantity data and the LSTM, an LSTM-based controllable air conditioner quantity prediction model is constructed, and the current time is usedThe data is substituted into the LSTM-based controllable air conditioner quantity prediction model, and the next moment is obtained through predictionThe number of controllable air conditioners which can participate in load adjustment;
predicting the next moment according to the average maximum power and the average minimum power of the single air conditioner in one operation periodThe method comprises the steps of setting up a load aggregation quotient based air conditioner load maximum and minimum response capability evaluation model, and evaluating to obtain the air conditioner load maximum under the control of the load aggregation quotientMaximum minimum response capability.
As a preferred technical scheme of the method, different methods are setAnd circularly iterating the energy-storage capacity estimation model to an air conditioner heat energy conversion efficiency model, an average power range estimation model, an LSTM-based controllable air conditioner quantity prediction model and a load aggregator-based air conditioner load maximum and minimum response capacity estimation model to obtain the energy-storage capacity estimation model for the futureMaximum and minimum response capability of air conditioner load under the control of load aggregators in time.
As a preferred technical scheme of the method, the construction process of the air conditioner heat energy conversion efficiency model comprises the following steps:
the heat storage mechanism of the air conditioner is determined, namely the air conditioner operates in a heat storage process of converting electric energy into heat energy;
based on the heat storage mechanism of the air conditioner, the air conditioner is arrangedThe indoor temperature is controlled byIs reduced toThe heat stored in the process isAir conditionerThe indoor temperature is controlled byIs reduced toThe heat stored in the process isThen, the formula of the heat energy conversion efficiency of the air conditioner is as follows:
(ii) a Wherein the content of the first and second substances,for air-conditioningThe outdoor temperature of (a) is set,、are air conditioners respectivelyThe set indoor maximum temperature and minimum temperature,、are air conditioners respectivelyThe on/off operation cycle of the switch is started,for the load aggregatorsControlled air conditioneriThe power of the operation is that of the power,as a load aggregatorAControlled air conditionerThe heat energy conversion efficiency of (2).
As a preferred technical scheme of the method, the process of constructing the average power range evaluation model comprises the following steps:
obtaining the air conditioner according to the model of the heat energy conversion efficiency of the air conditionerDuring the whole operation period, the minimum heat storage energy isMaximum stored heat energy ofThen can obtainWherein, in the process,andare respectively the load aggregatorsAControlled air conditionerAverage minimum power and average maximum power over a run period.
As a preferred technical scheme of the method, the process of constructing the controllable air conditioner quantity prediction model based on the LSTM comprises the following steps:
acquiring historical controllable air conditioner quantity data, and constructing an LSTM model which takes the controllable air conditioner quantity data at the current moment as input and takes the controllable air conditioner quantity data at the next moment as output; training the model by taking the data of the number of the historical controllable air conditioners as sample data;
the LSTM model is:(ii) a Wherein, the first and the second end of the pipe are connected with each other,in order to be an LSTM model,as a load aggregatorAThe number of the air conditioners can be controlled historically,after time t, to be predictedThe number of air conditioners can be controlled at any time;
the formula used in the training process is:whereinIs an activation function;in order to forget the output of the gate, 、is a corresponding forgetting gate matrix;is the output of the input gate or gates, 、a weight matrix for the corresponding input gate;is the information of the state of old cells,in order to select the addition of the candidate state information,in order to update the information on the cells,、is a corresponding neuron matrix;is the output of the output gate or gates,、is a corresponding matrix of output gates;in order to output the result of the process,for the samples at the time t, the samples are,is composed ofTime hidden layer input quantity。
As a preferred technical scheme of the method, the working process of the air conditioner load maximum and minimum response capability evaluation model based on the load aggregators is as follows:
obtaining the average maximum power and the average minimum power of a single air conditioner in one operation period, and obtaining the next time obtained by predictionThe number of the controllable air conditioners which can participate in load adjustment is obtained, and the controlled air conditioners of the load aggregators are obtained;
substituting into a model formula:(ii) a Wherein the content of the first and second substances,、respectively future timeThe load aggregator a controls the maximum and minimum response power of the cluster air conditioners,the number of air conditioners may be controlled for the load aggregator history,after time t, to be predictedThe number of air conditioners can be controlled at any time.
Air conditioner response ability evaluation device based on LSTM and heat storage mechanism includes: the system comprises a processor and a memory, wherein the memory stores a computer program executable by the processor, and the processor executes the computer program to realize the air conditioner response capacity evaluation method based on the LSTM and the heat storage mechanism.
In conclusion, the invention has the following beneficial effects: the air conditioner load response capacity of the load aggregator can be evaluated, the upper limit value and the lower limit value of the air conditioner load power can be mastered, support is provided for plan correction and power grid dispatching of a power grid, the power grid regulation and control level is improved, and the stable operation level of the power grid is improved.
Drawings
FIG. 1 is a flow chart of the method of the present invention;
FIG. 2 is a schematic diagram of the heat storage mechanism of the air conditioner of the present invention;
FIG. 3 is a schematic diagram of the LSTM model training of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The invention provides an air conditioner response capability assessment method based on LSTM and a heat storage mechanism, which comprises the following steps as shown in figure 1:
s1, constructing an air conditioner heat energy conversion efficiency model according to a heat storage mechanism of an air conditioner, and obtaining the conversion efficiency between the heat stored in the heat exchange process of the air conditioner and the consumed electric energy.
The construction process of the air conditioner heat energy conversion efficiency model comprises the following steps:
s11, determining a heat storage mechanism of the air conditioner, namely, the air conditioner runs in a heat storage process of converting electric energy into heat energy;
s12, based on the heat storage mechanism of the air conditioner, as shown in figure 2, the air conditioner is arrangedThe indoor temperature is controlled byIs reduced toThe heat stored in the process isAfter entering the comfortable area, the air conditionerThe indoor temperature is controlled byIs reduced toThe heat stored in the process isThe comfort zone is the set maximum temperature and minimum temperature in the air-conditioning room, and then the air-conditioning heat energy conversion efficiency formula is:
;(ii) a Wherein the content of the first and second substances,for air-conditioningThe outdoor temperature of (a) is set,、are air conditioners respectivelyThe set maximum temperature and the minimum temperature in the room,、are air conditioners respectivelyThe switch of (2) is turned on and off for a running period,as a load aggregatorControlled air conditioneriThe power of the operation is controlled by the power controller,as a load aggregatorAControlled air conditionerThe efficiency of thermal energy conversion, in figure 2,、respectively represent the load aggregatorsAir conditionerIn thattThe time is in idle state and running state.
S2, according to the conversion efficiency between the heat stored in the heat exchange process of the air conditioner and the consumed electric energy, an average power range evaluation model is constructed, and the average maximum power and the average minimum power of the single air conditioner in one operation period are obtained.
Obtaining the air conditioner according to the model of the heat energy conversion efficiency of the air conditionerDuring the whole operation period, the minimum heat storage energy isI.e. the air conditioner will control the temperatureIs reduced toAfter entering the comfort zone, the indoor temperature is maintained at the higher comfort zone temperature. Maximum heat storage energy ofI.e. the air conditioner will control the temperatureIs reduced toAfter entering the comfort zone, the indoor temperature is maintained at the lower comfort zone temperature, and the load aggregation quotient can be calculatedAControlled air conditionerAverage minimum power over a run periodAnd average maximum powerIt behaves as:。
s3, according to the historical quantity data of the controllable air conditioners and the LSTM, constructing a controllable air conditioner quantity prediction model based on the LSTM, and enabling the current time to be the sameSubstituting the data into a controllable air conditioner quantity prediction model based on the LSTM, and predicting to obtain the next momentThe number of controllable air conditioners which can participate in load adjustment.
As shown in fig. 3, the process of constructing the LSTM-based controlled air-conditioning quantity prediction model includes:
acquiring historical controllable air conditioner quantity data, and constructing an LSTM model which takes the controllable air conditioner quantity data at the current moment as input and takes the controllable air conditioner quantity data at the next moment as output; training the model by taking the data of the number of the historical controllable air conditioners as sample data;
the LSTM model is:(ii) a Wherein the content of the first and second substances,in order to be an LSTM model,for the load aggregatorsAThe number of air conditioners can be controlled historically,after time t, to be predictedThe number of air conditioners can be controlled at any time;
the formula used in the training process is:whereinIs an activation function;in order to forget the output of the gate, 、is a corresponding forgetting gate matrix;is the output of the input gate or gates, 、a weight matrix for the corresponding input gate;as information on the state of the old cells,in order to select the addition of the candidate state information,in order to update the information on the cells,、is a corresponding neuron matrix;in order to output the output of the gate,、is a corresponding output gate matrix;in order to output the result of the process,for the samples at the time t,is composed ofThe time instant implies the layer input quantity.
S4, predicting the next moment according to the average maximum power and the average minimum power of the single air conditioner in one operation periodThe number of controllable air conditioners capable of participating in load adjustment and a load aggregation quotient are used for constructing an air conditioner load maximum and minimum response capability evaluation model based on the load aggregation quotient, and the air conditioner load maximum and minimum response capability under the control of the load aggregation quotient is evaluated and obtained.
The working process of the air conditioner load maximum and minimum response capacity evaluation model based on the load aggregators is as follows:
obtaining the average maximum power and the average minimum power of a single air conditioner in an operation period, and obtaining the next predicted timeThe number of the controllable air conditioners which can participate in load adjustment is obtained, and the controlled air conditioners of the load aggregators are obtained;
substituting into a model formula:(ii) a Wherein, the first and the second end of the pipe are connected with each other,、respectively the future timeLoad aggregation business A controlled cluster air conditionerThe large and the minimum response power are set,the number of air conditioners can be controlled for the history of the load aggregator,after time t, to be predictedThe number of air conditioners can be controlled at any time.
S5, setting up differentlyThe method comprises the steps of circularly iterating the method to an air conditioner heat energy conversion efficiency model, an average power range evaluation model, an LSTM-based controllable air conditioner quantity prediction model and a load aggregator-based air conditioner load maximum and minimum response capacity evaluation model to obtain a future-to-future air conditioner load maximum and minimum response capacity evaluation modelMaximum and minimum response capacity of air conditioning load under control of load aggregator over time. E.g. arranged differently according to predicted demandAnd the effective prediction and evaluation of the air conditioner load response capacity in the future time of 15min, 1h, 2h and the like can be realized.
Corresponding to the method, the invention also provides an air conditioner response capability evaluation device based on the LSTM and the heat storage mechanism, which comprises the following steps: the system comprises a processor and a memory, wherein the memory stores a computer program executable by the processor, and the processor executes the computer program to realize the air conditioner response capacity evaluation method based on the LSTM and the heat storage mechanism.
By the evaluation method and the evaluation device, the air conditioner load response capacity of the load aggregator can be evaluated, the upper limit value and the lower limit value of the air conditioner load power can be mastered, support is provided for plan correction and power grid dispatching of a power grid, the power grid regulation and control level is improved, and the stable operation level of the power grid is improved.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (7)
1. An air conditioner response capability assessment method based on LSTM and heat storage mechanism is characterized in that: the method comprises the following steps:
according to the heat storage mechanism of the air conditioner, an air conditioner heat energy conversion efficiency model is constructed, and the conversion efficiency between the heat stored in the heat exchange process of the air conditioner and the consumed electric energy is obtained;
according to the conversion efficiency between the heat stored and the consumed electric energy in the heat exchange process of the air conditioner, an average power range evaluation model is constructed to obtain the average maximum power and the average minimum power of a single air conditioner in one operation period;
according to the historical controllable air conditioner quantity data and the LSTM, an LSTM-based controllable air conditioner quantity prediction model is constructed, and the current time is usedThe data is substituted into the LSTM-based controllable air conditioner quantity prediction model, and the next moment is obtained through predictionThe number of controllable air conditioners which can participate in load adjustment;
predicting the next moment according to the average maximum power and the average minimum power of a single air conditioner in an operation periodControllable air conditioner quantity and load aggregators capable of participating in load adjustment, and load-based constructionAnd evaluating the maximum and minimum response capability of the air conditioner load of the aggregation provider to obtain the maximum and minimum response capability of the air conditioner load under the control of the load aggregation provider.
2. The method of claim 1 for evaluating responsiveness of an air conditioner based on LSTM and heat storage mechanisms, wherein: by setting up differentlyThe method comprises the steps of circularly iterating the method to an air conditioner heat energy conversion efficiency model, an average power range evaluation model, an LSTM-based controllable air conditioner quantity prediction model and a load aggregator-based air conditioner load maximum and minimum response capacity evaluation model to obtain a future-to-future air conditioner load maximum and minimum response capacity evaluation modelMaximum and minimum response capacity of air conditioning load under control of load aggregator over time.
3. The method of claim 2 for evaluating responsiveness of an air conditioner based on LSTM and heat storage mechanisms, wherein: the construction process of the air conditioner heat energy conversion efficiency model comprises the following steps:
the heat storage mechanism of the air conditioner is determined, namely the air conditioner operates in a heat storage process of converting electric energy into heat energy;
based on the heat storage mechanism of the air conditioner, the air conditioner is arrangedThe indoor temperature is controlled byIs reduced toThe heat stored in the process isAir conditionerThe indoor temperature is controlled byIs reduced toThe heat stored in the process isThen, the formula of the heat energy conversion efficiency of the air conditioner is as follows:
wherein, the first and the second end of the pipe are connected with each other,for air-conditioningThe outdoor temperature of the air conditioner is set,、are air conditioners respectivelyThe set indoor maximum temperature and minimum temperature,、are air conditioners respectivelyThe switch of (2) is turned on and off for a running period,as a load aggregatorControlled air conditioneriThe power of the operation is controlled by the power controller,、respectively represent the load aggregatorsAir conditionerIn thattThe time is in an idle state and a running state,for the load aggregatorsAControlled air conditionerThe heat energy conversion efficiency of (2).
4. The method of claim 3 for evaluating responsiveness of an air conditioner based on LSTM and heat storage mechanisms, wherein: the process of constructing the average power range evaluation model comprises the following steps:
according to the model of the heat energy conversion efficiency of the air conditioner,get in the air conditionerDuring the whole operation period, the minimum heat storage energy isMaximum heat storage energy ofThen can obtainWherein, in the step (A),andare respectively the load aggregatorsAControlled air conditionerAverage minimum power and average maximum power over a run period.
5. The method of claim 4 for evaluating responsiveness of an air conditioner based on LSTM and heat storage mechanisms, wherein: the process of constructing the controllable air conditioner quantity prediction model based on the LSTM comprises the following steps:
acquiring historical controllable air conditioner quantity data, and constructing an LSTM model which takes the controllable air conditioner quantity data at the current moment as input and takes the controllable air conditioner quantity data at the next moment as output; training the model by taking the data of the number of the historical controllable air conditioners as sample data;
the LSTM model is:(ii) a Wherein the content of the first and second substances,in order to be the model of the LSTM,as a load aggregatorAThe number of the air conditioners can be controlled historically,after time t, to be predictedThe number of air conditioners can be controlled at any time;
the formula used in the training process is:
in whichIs an activation function;in order to forget the output of the gate, 、is a corresponding forgetting gate matrix;is the output of the input gate or gates, 、a weight matrix for the corresponding input gate;as information on the state of the old cells,in order to select the addition of the candidate state information,in order to update the information on the cells,、is a corresponding neuron matrix;is the output of the output gate or gates,、is a corresponding output gate matrix;in order to output the result of the process,for the samples at the time t,is composed ofThe time instant implies the layer input quantity.
6. The method of claim 5 for evaluating responsiveness of an air conditioner based on LSTM and heat storage mechanisms, wherein: the working process of the air conditioner load maximum and minimum response capability evaluation model based on the load aggregators is as follows:
obtaining the average maximum power and the average minimum power of a single air conditioner in an operation period, and obtaining the next predicted timeThe number of the controllable air conditioners which can participate in load adjustment is obtained, and the controlled air conditioners of the load aggregators are obtained;
substituting into a model formula:(ii) a Wherein the content of the first and second substances,、respectively future timeThe load aggregator a controls the maximum and minimum response power of the cluster air conditioners,the number of air conditioners may be controlled for the load aggregator history,after time t, to be predictedThe number of air conditioners can be controlled at any time.
7. Air conditioner response ability evaluation device based on LSTM and heat storage mechanism, characterized by: the method comprises the following steps: a processor and a memory, the memory storing a computer program executable by the processor, the processor implementing the LSTM and heat storage mechanism based air conditioner responsiveness evaluation method of any of claims 1-6 when executing the computer program.
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