CN102034143A - Cost-saving energy-saving management system and method thereof - Google Patents

Abstract

A kind of energy-conserving management system of the cost-saving type and its method, it is to make the best contract capacity and leave the peak power consumption management to achieve the building and build and reduce the expenses of the electric charge, the goal of energy saving, and the building user signs the reasonable contract capacity and can control the sum of the basic electric charge and the excess additional charge in a lowest range, it is the good method to save the electric charge directly; therefore, the invention provides a method for calculating the optimal contract capacity by using the historical data of electricity consumption in the past years and matching with the optimal contract capacity prediction module, thereby saving the basic electricity expense. In addition, the demand management module and the load management module are used for effectively planning the power equipment to use, the peak power utilization is controlled by using a proper off-peak power utilization management strategy, the peak load is transferred to an off-peak time period to save the running power cost, the power consumption demand exceeds the contract capacity to pay over-contract additional cost, and the purpose of saving the power cost is further achieved.

Description

Cost-saving energy-saving management system and method thereof

technical field

The present invention relates to a cost-saving energy-saving management system and its method, in particular to a system and method for energy-saving management. the

Background technique

In the past, building energy management systems and methods did not have the main purpose of saving electricity bills. They generally only focused on collecting electricity consumption data and power monitoring and management. The results of electricity consumption data collection can only be used as a reference for energy management, and have nothing to do with saving electricity bills. No direct relationship; if you want to achieve the goal of saving electricity bills, you must understand the calculation method of electricity bills and set an appropriate regular contract capacity with the power company. The goal of saving electricity bills cannot be directly achieved by simply relying on energy management systems to collect power data or power monitoring. the

It can be seen that there are still many deficiencies in the above-mentioned conventional method, which is not a good design and needs to be improved urgently. the

Contents of the invention

The main purpose of the present invention is to provide a cost-saving energy-saving management system and its method, which is to use and analyze the historical data of electricity consumption in the past years to find the best contract capacity and directly reduce the basic electricity fee and avoid paying extra charges for exceeding the contract . the

The secondary purpose of the present invention is to use the demand management to manage the read power demand value, when it exceeds the threshold value, that is, directly use the automatic power transfer switch (ATS) to switch the power supply system to the generator to avoid exceeding the contract capacity, there is a surcharge for exceeding the contract. the

Another purpose of the present invention is to use load management to adjust part of the load according to the load characteristics to avoid starting during peak hours, so as to reduce the probability of exceeding the contract, and also reduce the mobile electricity bill. the

The cost-saving energy-saving management system and method that can achieve the above-mentioned purpose of the invention are realized by the optimal contract capacity prediction module, demand management module and load management module to achieve the purpose of saving electricity bills. The method is to use the historical data of electricity consumption in the past years , to obtain the best contract capacity, which can directly reduce the basic electricity charge and avoid paying extra charges for exceeding the contract; and cooperate with a proper off-peak power consumption management strategy to control peak power consumption and transfer peak loads to off-peak hours to save mobile electricity charges In addition, when the optimal contract capacity is obtained and the peak load transfer and off-peak load power consumption are done well, the sum of the basic electricity fee, the over-contract surcharge and the mobile electricity fee can be minimized, directly achieving the purpose of reducing electricity expenses and saving energy. . the

The optimal contract capacity prediction module is mainly based on the electricity price calculation method is to sign the contract capacity once a year, and cannot apply to change the pricing method within one year, so the historical data of electricity consumption in the past years is used to find the best contract capacity for the year. Reduce basic electricity charges and avoid over-contract surcharges. The optimal contracted capacity is mainly used as a reference for peak load suppression and demand control. the

In this demand management module, the user pre-sets the demand threshold, regularly reads the current demand, and when the demand exceeds the demand threshold, the power supply system is cut off by using the automatic power transfer switch (ATS) As for the generator, because the power is supplied by the generator instead of the mains power, the demand value will drop, and the contract will not be exceeded at all, and there will be no doubts about fines, so as to avoid paying additional fees for exceeding the contract. the

In addition, the load management module adjusts some loads (storage electric water heaters, water tower pumps, and charging equipment) according to the load characteristics to avoid starting during peak hours and shift them to start during off-peak hours. When starting up, because the electricity price is lower during off-peak hours, mobile electricity charges can be saved, and at the same time, the probability of electricity consumption exceeding the contracted capacity during peak hours can be reduced, avoiding the payment of over-contract surcharges. the

In addition, the electric energy is converted into other forms of storage during off-peak hours, such as starting the ice storage pump of the cold storage air conditioner to make ice, and then starting the ice water pump to send the ice water out during peak hours, and cooperates with the blower to send cold air into the room, and you can get comfortable The air conditioner can also avoid excessive peak power load, and start the water pump to fill the water storage tower to the full water level during the off-peak period; another form of storage is to store the electric energy in the battery by charging during the off-peak period. Once the predicted peak power demand will exceed the contracted capacity, the computer or low power consumption equipment will be powered by the battery. the

Compared with other existing technologies, the cost-saving energy-saving management system and method provided by the present invention have the following advantages:

1. The present invention uses the historical data of electricity consumption in the past years and cooperates with the algorithm provided for numerical analysis to find the best contract capacity of the year, so as to directly reduce the basic electricity fee and avoid paying extra charges for exceeding the contract, and the optimal contract capacity can save Substantial base electricity bill. the

2. The demand management module of the present invention can immediately switch the mains power to the generator when the demand value is close to the contracted capacity, so as to avoid paying an over-contract surcharge due to demand exceeding the contract. the

3. The load management module of the present invention provides users with the ability to set the operating cycle time of the main unit or compressor of the air conditioner, and use the existing blower and cooling water circulation pump to achieve the purpose of supplying cold air. The indoor personnel will not obviously feel the temperature difference of the air conditioner, and the periodic Operation can save electricity during peak hours during the day, and save mobile electricity charges in addition to avoiding exceeding appointments. the

4. The load management of the present invention sets off-peak hours to start cold storage air-conditioning ice making, water storage electric water heaters, pumps for water storage towers, and charging for UPS or batteries, which can fully achieve the purpose of pulling up off-peak loads, and the load is not in use. Start during peak hours so reduce the probability of exceeding the contracted capacity during peak hours and avoid paying extra charges for exceeding the contract

5. The present invention can also achieve the purpose of saving mobile electricity charges by using relatively cheap off-peak electricity. the

Description of drawings

Fig. 1 is a system architecture diagram of the cost-saving energy-saving management system and method thereof of the present invention;

Fig. 2 is the optimal contract capacity prediction flowchart of the cost-saving energy-saving management system and method thereof of the present invention;

Fig. 3 is the demand management flowchart of the cost-saving energy-saving management system and method thereof of the present invention; and

Fig. 4 is the load management flowchart of the cost-saving energy-saving management system and method thereof of the present invention;

Explanation of reference signs:

11-section fee-type energy-saving management system;

12 optimal contract capacity prediction module;

13 demand management module;

14 load management module;

21 general air-conditioning equipment;

22 cold storage air-conditioning equipment;

23 computer equipment;

24 water storage electric water heater;

25 water storage tower pump;

26 generators;

27 uninterruptible power system;

28 charging equipment. the

Detailed ways

Please refer to Fig. 1, which is a system architecture diagram of the cost-saving energy-saving management system and its method of the present invention. It can be seen from the figure that the cost-saving energy-saving management system 11 mainly includes:

The optimal contract capacity prediction module 12 is set in the cost-saving energy-saving management system 11, which can analyze the historical data of electricity consumption in the past years to find the optimal contract capacity for the year;

The demand management module 13 is installed in the cost-saving energy-saving management system 11 to manage the read power demand value. When it exceeds the threshold value, the power supply system is directly switched to power generation by using the automatic power transfer switch (ATS) machine, that is to say, load power supply can be switched according to the best contract capacity;

The load management module 14 is set in the cost-saving energy-saving management system 11, which can plan the starting sequence and linkage relationship of each load during peak hours and off-peak hours, and implement off-peak power consumption management to control peak power consumption;

The load equipment controlled by the cost-saving energy-saving management system 11 may include general air conditioning equipment 21, cold storage air conditioning equipment 22, computer equipment 23, water storage electric water heater 24, water storage tower pump 25, generator 26, uninterruptible power supply System (UPS) 27 and charging equipment 28 . the

Please refer to Fig. 2, which is the optimal contract capacity prediction flow chart of the cost-saving energy-saving management system and its method of the present invention. Then use the electricity consumption data of the past years to find out the annual minimum total electricity charge, and finally use the minimum use demand, the maximum use demand and the minimum total electricity charge of the past years to cooperate with the positive value of the numerical analysis The cutting method is used to find out the best contract capacity to be applied for in the current year;

The detailed steps of the optimal contract capacity prediction are:

1. Obtain the minimum demand for electricity (variable X ₀ ) and the highest demand for electricity (variable X ₁ ) using the data of electricity charges in the past year, set the optimal contract capacity value as X, and set the allowable error value is Err;

2. Then set the minimum total electricity fee in the past year Y=X ₀ ^* [electricity fee per kilowatt per month (summer month) + electricity fee per kilowatt per month (non-summer month)] + mobile electricity fee per month;

In addition, according to the power company’s electricity price calculation method, set the over-contract surcharge EBill(X)=[(maximum demand-X)*A0], where A0 is the coefficient of the power company’s definition of overpayment for exceeding the contracted capacity;

3. Set the function Bill(X)=X*【Electricity fee per kilowatt per month (summer month) + electricity fee per kilowatt per month (non-summer month)] + mobile electricity fee + EBill(X)-Y;

4. Calculate the optimal contract capacity X＝X ₁ -Bill(X ₁ )*(X ₁ -X ₀ )/[Bill(X ₁ )-Bill(X ₀ )] according to the first three steps, using sequential iteration variables The calculation process makes the absolute value of X-X1 less than the set Err value, and finally obtains the optimal contract capacity value X.

Please refer to Fig. 3, which is a demand management flow chart of the cost-saving energy-saving management system and its method of the present invention. It can be seen from the figure that the demand management module provides users with a set demand threshold value as a reference for power supply system switching According to the basis, the current demand value of electric power will be read regularly, and compared with the set demand threshold value, and when the used demand value exceeds the threshold value, the power supply system will be switched to On the UPS system connected to the generator, in addition, when the demand value is lower than the set threshold value, it will switch back to the normal power supply of the mains;

The detailed steps of demand management are:

1. The user presets the demand threshold T ₁ ;

2. The demand management module reads the power demand value X and compares it with the set demand threshold value _T1 ;

3. When the power demand value X is greater than T ₁ , use the automatic power transfer switch (ATS) to switch the power supply system to the UPS system connected to the generator. Although it takes about half a minute to wait for the generator to supply power normally, due to the UPS power supply Will not affect the normal operation of the load;

4. After the power supply system is switched, continue to read the power demand value X. When the power demand value X is less than T ₁ , the automatic power transfer switch (ATS) will switch the power supply system to the mains to maintain normal power supply.

Please refer to Fig. 4, which is a load management flow chart of the cost-saving energy-saving management system and method thereof of the present invention. It can be seen from the figure that the load management module provides the user with setting the cycle time for starting and stopping the compressor of the air conditioner, and also It provides users with the setting of load start-up order and setting conditions for the linkage between return air temperature and chiller, and when it is judged that the system time is a peak period, the load is started according to the set order, and at the same time, the cold storage air conditioner is also started and the compressor cycle is implemented In addition, when it is judged that the system time is a peak time, it will detect the return air temperature and automatically control the ice water machine, and at the same time stop the pumping tower pump, water storage electric water heater and stop charging the battery;

If it is judged that the system time is off-peak time, the ice storage pump of the cold storage air conditioner will be activated to make ice. In addition, when the system time is judged to be off-peak time, the water storage tower pump will be activated to pump the water to full water level, and the storage type electric water heater will also be activated. , in addition to charging the battery and UPS;

The detailed steps of load management are:

1. Set the cycle time of starting and stopping the compressor of the air conditioning equipment, the load starting sequence and the setting conditions for the linkage between the return air temperature and the chiller;

2. When the system time is the peak time, start the load according to the set order, and also start the cold storage air conditioner and implement the periodic operation of the compressor;

3. Detect the return air temperature and automatically control the ice water machine in linkage, and at the same time stop starting the pumping tower pump, water storage electric water heater and stop charging the battery;

4. When the system time is off-peak hours, start the ice storage pump of the cold storage air conditioner to make ice;

5. Start the water storage tower pump to pump the water to the full water level and start the storage type electric water heater at the same time, and also charge the battery and UPS. the

The above detailed description is a specific description of a feasible embodiment of the present invention, but this embodiment is not used to limit the patent scope of the present invention, and any equivalent implementation or change that does not depart from the technical spirit of the present invention shall include within the patent scope of this case. the

Claims (8)

1. Yi Zhong Jie Feishi energy-saving management system is characterized in that, its composition comprises:

Best contract capacity predict module is to be arranged in the Jie Feishi energy-saving management system, can analyze passing annual electricity consumption historical data, to obtain the best contract capacity of current year;

The requirement administration module is to be arranged in the Jie Feishi energy-saving management system, can make electric according to best contract capacity and switch;

The load management module is to be arranged in the Jie Feishi energy-saving management system, can plan the spike period with from peak period each load boot sequence and continuous action relation.

2. Jie Feishi energy-saving management system as claimed in claim 1 is characterized in that, described best contract capacity predict module has:

1) finds out minimum use requirement and the highest use requirement according to passing annual electricity consumption data;

2) utilize passing annual electricity consumption data to find out minimum total electricity charge of year;

3) utilize the minimum use requirement of passing annual electricity consumption, the highest use requirement and minimum total electricity charge of year, cooperate the sencant method of numerical analysis to obtain the best contract capacity of desire application then.

3. Jie Feishi energy-saving management system as claimed in claim 1 is characterized in that, described requirement administration module has:

1) provide the user to set the requirement threshold value, as the reference frame of electric power system switching;

2) the requirement value of present electric power is read in timing, and makes comparisons with the requirement threshold value of setting;

3) when using the requirement value to exceed threshold value, utilize automatic power switch that electric power system is cut to the UPS of generator binding;

4) when using the requirement value less than setting threshold value, switchback civil power normal power supply again.

4. Jie Feishi energy-saving management system as claimed in claim 1 is characterized in that, described load management module has:

1) provide the user to set air-conditioning equipment compressor start and the cycle length that stops;

2) provide the user to set load boot sequence and setting return air temperature and frozen water machine interlock condition;

3) when judging that system time is then to comply with the spike period to set the sequence starting load, also starts cold-storing type air-conditioning simultaneously and implements the compressor cycle running;

4), also stop to start draw water tower water pumper, storage-type electric water heater and stop simultaneously to charge in batteries when judging that system time is then to detect return air temperature the spike period automatically the frozen water machine to be done interlock control;

5) when judging that system time is for then starting the ice storage pump ice making of cold-storing type air-conditioning from the peak period;

6) when judging that system time is evacuated to full-water level with water and also starts storage-type electric water heater simultaneously for then start the water storage tower water pumper from the peak period, in addition also to accumulator and UPS charging.

5. Yi Zhong Jie Feishi administration of energy conservation method is characterized in that, comprising:

1) utilize best contract capacity predict module to obtain the method for best contract capacity;

2) utilize the requirement administration module to make the method for requirement control;

3) utilize the load management module to make the method for load management.

6. Jie Feishi administration of energy conservation method as claimed in claim 5 is characterized in that, the step that described best contract capacity predict module is obtained the method for best contract capacity comprises:

1) gets minimum requirement toward the annual electricity consumption electricity charge, be variable X ₀, and the maximum demand of electricity consumption, be variable X ₁, best contract capability value is set at X, the tolerable error amount is set at Err;

2) set the minimum total electricity charge Y=X of passing annual electricity consumption again ₀*+electricity charge, wherein X flow ₀* be the every month moon of summer every kilowatt of electricity charge+every kilowatt of electricity charge of the non-every month moon of summer; In addition set super about additional cost EBill (X)=[(maximum demand-X) * A0] according to Utilities Electric Co.'s electricity price account form, wherein A0 be Utilities Electric Co. define exceed the contract capacity should pay the coefficient of the electricity charge more;

3) set the mobile electricity charge+EBill (X) of function Bill (X)=X*+-Y;

4) according to first three items step calculating optimum contract capacity X=X ₁-Bill (X ₁) * (X ₁-X ₀)/[Bill (X ₁)-Bill (X ₀)],

5) utilize the calculation process of iteration variable in regular turn, make X-X ₁Absolute value less than the Err value of setting, draw best contract capability value X at last.

7. Jie Feishi administration of energy conservation method as claimed in claim 5 is characterized in that, the step that described requirement administration module carries out the method for requirement control comprises:

1) preestablishes requirement threshold value T ₁

2) read power demand value X, and it is compared with the requirement threshold value T1 that sets;

3) when power demand value X greater than T ₁, then utilize automatic power switch that electric power system is cut to the UPS of generator binding, wait the question generator normal power supply;

4) after electric power system is switched, still continue to read power demand value X, when power demand value X less than T ₁Then automatic power switch cuts electric power system to civil power, keeps normal power supply.

8. Jie Feishi administration of energy conservation method as claimed in claim 5 is characterized in that, the step that described load management module is carried out the method for load management comprises:

1) sets air-conditioning equipment compressor start and the cycle length that stops and load boot sequence and setting return air temperature and frozen water machine interlock condition;

2) when system time be the spike period then according to setting the sequence starting load, also start cold-storing type air-conditioning simultaneously and implement the compressor cycle running;

3) the detecting return air temperature is done interlock control to the frozen water machine automatically, also stops to start draw water tower water pumper, storage-type electric water heater and stop charge in batteries simultaneously;

4) when system time be the ice storage pump ice making that starts cold-storing type air-conditioning from the peak period; Startup water storage tower water pumper is evacuated to full-water level with water and also starts storage-type electric water heater simultaneously, in addition also to accumulator and UPS charging.

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