CN105022376A - Domestic energy efficiency management method based on time-of-use electricity price - Google Patents

Abstract

Theinventionprovides a domestic energy efficiency management method based on time-of-use electricity price. According to the invention, on the basis of knowing a time-of-use electricity price curve and all working time features of all domestic electric appliance, the minimization of accumulated electricity charge of a user in a single period is taken as a target function, assuming the kinds, the number and the power of the domestic electric appliance in the research period are kept unchanged and satisfy constrains that (1) the total instant power of the electric appliance at any moment is lower than the maximum power of a line; and (2) the operation time of all the electric appliance meets their normal working time features. According to the invention, the optimal operation starting time of all delay electric appliance can be obtained and the electric appliance can be switched on and off as schedules. A calculation results shows that accumulated electric charge of the user can be analyzed and reduced effectively with the premise of time-of-use electricity price.

Description

Based on family's energy efficiency managing method of tou power price

Technical field

The present invention relates to energy efficiency management technical field, particularly, relate to the family's energy efficiency managing method based on tou power price.

Background technology

In recent years along with the develop rapidly of economy, living standard and the social informatization degree of people improve constantly, and the requirement of people to domestic environment is also more and more higher.Smart Home is as a kind of emerging household appliances management mode platform, comprehensive indoor wireless communication technology, computer networking technology and automatic control technology, construct the Undivided family automated system that comprises the subsystems such as environmental monitoring, household electrical appliances Monitoring and Controlling, remote monitoring, safety guard, substantially increase the comfortableness of people's living environment, security, energy-conserving and environment-protective more simultaneously.

Intelligent housing center can realize the real-time detection of household electrical appliance running status and power consumption by indoor cordless communication network and electric energy collection module, reaches the effect of remote controlling household electric equipment simultaneously.But, the research of current Smart Home still mainly concentrates in hardware design and communication system, relate to less to the excavation of large data, but the powerful data acquisition function of Smart Home provide the foundation, and makes it the research direction becoming a great potential to household electricity analysis and planning.

In addition, the implementation of timesharing step price makes that resident carries out economy, rational utilization of electricity mode has had more dirigibility, is no longer using electricity wisely single in traditional sense, but can by reaching the object reducing the electricity charge working time of household electrical appliance of making rational planning for.

Summary of the invention

For defect of the prior art, the object of this invention is to provide a kind of family's energy efficiency managing method based on tou power price.Family's energy efficiency managing method based on tou power price provided by the invention is the data acquisition and control function utilizing intelligent domestic system hardware powerful, for the feature of tou power price, analysis and modeling is carried out to the operation characteristic of household electrical appliance, by calculating the best start working time of electrical equipment, and timing controlled is carried out to it, obtain the effect reducing the subscriber household electricity charge.

According to a kind of family's energy efficiency managing method based on tou power price provided by the invention, comprise the steps:

Steps A, founding mathematical models:

$\min C=\underset{k=0}{\overset{1440/T_0-1}{\Σ}}I\left(k\right)\underset{i=1}{\overset{N}{\Σ}}\mathrm{\ϵ}(k-H_i^{st}-s_i)\mathrm{\ϵ}(H_i^{st}+s_i+M_i-1-k)P_L\left(i\right)T_0$

$s.t.\begin{array}{c}P\left(k\right)\≤P_{\max }\\ 0\≤s_i\≤H_i^{fh}-H_i^{st}-M_i\end{array}$

Wherein:

C---in the single cycle, user adds up the electricity charge;

K---time interval sequence number;

T ₀---the minimum time interval corresponding time;

Spot Price on I (k)---time interval [k, k+1];

I---electrical equipment is numbered;

N---household electrical appliance sum;

---the interval sequence number of the earliest time that the electrical equipment being numbered i brings into operation;

S _i---be numbered the delay time interval number of the electrical equipment of i;

M _i---the electrical equipment being numbered i runs once shared time interval number continuously;

P _l(i)---be numbered the operate power of the electrical equipment of i;

All appliance power sums that P (k)---time interval [k, k+1] is running;

P _max---circuit peak power;

---the electrical equipment being numbered i terminates the sequence number of time interval the latest run;

$\mathrm{\&epsiv;}\left(t\right)=\{\begin{array}{cc}1,& t\&GreaterEqual;0\\ 0,& t<0\end{array};$

Step B, to can time delay electrical equipment, by described mathematical model, solves and obtains corresponding si; Will value as can best start working time of time delay electrical equipment;

Step C, to carrying out timing break-make by time delay electrical equipment, makes can the best start working time place of time delay electrical equipment to bring into operation described by time delay electrical equipment.

Preferably,

$P\left(k\right)=\underset{i=1}{\overset{N}{\&Sigma;}}f(i,k)P_L\left(i\right)$

Wherein:

F (i, k)---electric operation time discriminant function, if the electrical equipment being numbered i above runs at time interval [k, k+1], then f (i, k)=1, otherwise f (i, k)=0;

Judge whether the electrical equipment being numbered i runs on time interval [k, k+1] by f (i, k), namely

Preferably,

$H_i^{st}=T_i^{st}/T_0$

$H_i^{fh}=T_i^{fh}/T_0$

M _i＝T _i/T ₀

Wherein,

---be numbered the electrical equipment early start working time of i;

---be numbered the electrical equipment time of power cut-off the latest of i;

T _i---be numbered the electrical equipment continuous working duration of i.

Compared with prior art, the present invention has following beneficial effect:

The present invention proposes the application that intelligent domestic system one is new, namely be not only that traditional remote switch controls and security monitoring, but emphasize the excavation of Household Appliance data, for the tou power price policy performed at present, best start working time of household electrical appliance is obtained and the corresponding switch according to best start control apparatus working time, to reduce demand charge by analysis modeling.

Accompanying drawing explanation

By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:

Fig. 1 is Mathematical Models process analysis procedure analysis figure of the present invention.

Fig. 2 is the tou power price curve of simulating in embodiment.

Fig. 3 is the result of calculation of embodiment.

Fig. 4 is intelligent domestic system structural drawing.

Embodiment

Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some changes and improvements can also be made.These all belong to protection scope of the present invention.

Along with the propelling of power market reform, a lot of place comes into effect tou power price policy in succession, and the Different periods electricity price namely at a day is different.Such as, Shanghai City adopts time-of-use tariffs standard at present, and during peak times of power consumption, electricity price is higher, and relatively low in low ebb phase electricity price.Therefore, ensureing, under the prerequisite of the total instantaneous power of any time electrical equipment lower than circuit peak power, demand charge to be reduced by the working time of household electrical appliance of making rational planning for.

Consider electrical equipment actual moving process and ensure that it can safe and stable operation, electric operation time planning need meet following constraint:

Constraint (1): the total instantaneous power of any time electrical equipment is lower than circuit peak power;

Constraint (2): all electrical equipment all runs in respective corresponding special time interval.

In addition, outstanding research emphasis, supposes that the kind of household electrical appliance, quantity and power are constant in the reasonable scope for simplifying the analysis.

Founding mathematical models: with 1 day for the cycle is analyzed electricity consumption planning problem, the time, with a minute unit, was divided into 1440/T by one day ₀individual interval, selects user in the single cycle to add up the electricity charge and minimizes as objective function, namely

$\min C=\underset{k=0}{\overset{1440/T_0-1}{\&Sigma;}}I\left(k\right)P\left(k\right)T_0$

Wherein:

C---in the single cycle, user adds up the electricity charge;

K---time interval sequence number, k=0,1 ..., 1440/T ₀-1;

Spot Price on I (k)---time interval [k, k+1];

Household electrical appliance general power on P (k)---time interval [k, k+1];

T ₀---the minimum time interval corresponding time, unit: minute.

P (k) equals all appliance power sums that time interval [k, k+1] is running, namely

$P\left(k\right)=\underset{i=1}{\overset{N}{\&Sigma;}}f(i,k)P_L\left(i\right)$

Wherein:

N---household electrical appliance sum;

I---electrical equipment number, i=1,2 ..., N;

F (i, k)---electric operation time discriminant function, if the electrical equipment being numbered i above runs at time interval [k, k+1], then f (i, k)=1, otherwise f (i, k)=0;

P _l(i)---be numbered the operate power of the electrical equipment of i.

Can be judged by f (i, k) whether the electrical equipment being numbered i runs on time interval [k, k+1], namely

Wherein:

---the interval sequence number of the earliest time that the electrical equipment being numbered i brings into operation;

M _i---the electrical equipment being numbered i runs once shared time interval number continuously;

S _i---be numbered the delay time interval number of the electrical equipment of i, the electrical equipment being namely numbered i is actual in interval point bring into operation.

Therefore, the family's energy efficiency management system mathematical model based on tou power price can be written as

$\min C=\underset{k=0}{\overset{1440/T_0-1}{\&Sigma;}}I\left(k\right)\underset{i=1}{\overset{N}{\&Sigma;}}\mathrm{\&epsiv;}(k-H_i^{st}-s_i)\mathrm{\&epsiv;}(H_i^{st}+s_i+M_i-1-k)P_L\left(i\right)T_0$

$s.t.\begin{array}{c}P\left(k\right)\&le;P_{\max }\\ 0\&le;s_i\&le;H_i^{fh}-H_i^{st}-M_i\end{array}$

Wherein

$\mathrm{\&epsiv;}\left(t\right)=\left\{\begin{array}{cc}1,& t\&GreaterEqual;0\\ 0,& t<0\end{array}\right.$

P _maxrepresent circuit peak power;

represent that the electrical equipment being numbered i terminates the point of the time interval the latest sequence number run.

As from the foregoing, based on the delay time interval number s that family's energy efficiency management of tou power price is with each electrical equipment _ifor the Nonlinear Multivariable planning problem of variable.

The present embodiment comprises the following steps:

Step one: user needs according to daily arrangement, take sky as the operating time behavior cycle determining each electrical equipment, comprises the early start working time the time of power cut-off the latest electrical equipment continuous working duration T _ideng, data list is as shown in table 1.

Step 2: by optimization problem discretize, determines minimum interval T ₀, T in the present embodiment ₀=10min, converts according to formula (1) and obtains and M _i.

$H_i^{st}=T_i^{st}/T_0$

$H_i^{fh}=T_i^{fh}/T_0\mathrm{...}\left(1\right)$

M _i＝T _i/T ₀

Step 3: the operating time behavior of electrical equipment is judged, if it meets formula (2), then illustrating that this electrical equipment belongs to can not time delay electric appliances, must at the appointed time intervally above to run, can directly skip optimization link, directly calculate final resident and add up the electricity charge.

$H_i^{fh}-H_i^{st}-M_i=\mathrm{0...}\left(2\right)$

Step 4: if can time delay electric appliances negligible amounts, can traversal be adopted, by all time delay interval number s _ibringing objective function into calculate, obtaining net result by comparing; If can time delay electric appliances quantity the heuritic approaches such as genetic algorithm can be adopted more at most to solve.In the present embodiment only can time delay electric appliances containing 2, therefore adopt traversal to solve this mathematical model.By calculating, can obtain can best start working time of time delay electrical equipment and user's always accumulative electricity price, and optimum results as shown in Figure 3.

Step 5: above solution procedure is all carried out in the host computer subsystem of intelligent domestic system, as shown in Figure 4.According to the best start working time of each electrical equipment, intelligent domestic system is manipulated smart jack by indoor ZigBee-network, thus timing break-make is carried out to each electrical equipment, make electrical equipment the best start working time place bring into operation, reach the effect reducing family energy charge.

Table 1 household electric appliance operation property list

Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make a variety of changes within the scope of the claims or revise, and this does not affect flesh and blood of the present invention.When not conflicting, the feature in the embodiment of the application and embodiment can combine arbitrarily mutually.

Claims (3)

1., based on family's energy efficiency managing method of tou power price, it is characterized in that, comprise the steps:

Steps A, founding mathematical models:

$\min C=\underset{k=0}{\overset{1440/T_0-1}{\&Sigma;}}I\left(k\right)\underset{i=1}{\overset{N}{\&Sigma;}}\mathrm{\&epsiv;}(k-H_i^{st}-s_i)\mathrm{\&epsiv;}(H_i^{st}+s_i+M_i-1-k)P_L\left(i\right)T_0$

$\begin{array}{cc}s.t.& \begin{array}{c}P\left(k\right)\&le;P_{\max }\\ 0\&le;s_i\&le;H_i^{fh}-H_i^{st}-M_i\end{array}\end{array}$

Wherein:

C---in the single cycle, user adds up the electricity charge;

K---time interval sequence number;

T ₀---the minimum time interval corresponding time;

Spot Price on I (k)---time interval [k, k+1];

I---electrical equipment is numbered;

N---household electrical appliance sum;

---the interval sequence number of the earliest time that the electrical equipment being numbered i brings into operation;

S _i---be numbered the delay time interval number of the electrical equipment of i;

M _i---the electrical equipment being numbered i runs once shared time interval number continuously;

P _l(i)---be numbered the operate power of the electrical equipment of i;

All appliance power sums that P (k)---time interval [k, k+1] is running;

P _max---circuit peak power;

---the electrical equipment being numbered i terminates the sequence number of time interval the latest run;

$\mathrm{\&epsiv;}\left(t\right)=\{\begin{array}{cc}1,& t\&GreaterEqual;0\\ 0,& t<0\end{array};$

Step B, to can time delay electrical equipment, by described mathematical model, solves and obtains corresponding s _i; Will value as can best start working time of time delay electrical equipment;

Step C, to carrying out timing break-make by time delay electrical equipment, makes can the best start working time place of time delay electrical equipment to bring into operation described by time delay electrical equipment.

2. the family's energy efficiency managing method based on tou power price according to claim 1, is characterized in that,

$P\left(k\right)=\underset{i=1}{\overset{N}{\&Sigma;}}f(i,k)P_L\left(i\right)$

Wherein:

F (i, k)---electric operation time discriminant function, if the electrical equipment being numbered i above runs at time interval [k, k+1], then f (i, k)=1, otherwise f (i, k)=0;

Judge whether the electrical equipment being numbered i runs on time interval [k, k+1] by f (i, k), namely

3. the family's energy efficiency managing method based on tou power price according to claim 1, is characterized in that,

$H_i^{st}=T_i^{st}/T_0$

$H_i^{fh}=T_i^{fh}/T_0$

M _i＝T _i/T ₀

Wherein,

---be numbered the electrical equipment early start working time of i;

---be numbered the electrical equipment time of power cut-off the latest of i;

T _i---be numbered the electrical equipment continuous working duration of i.