CN105429147A - Interactive power-saving capacity evaluation method for intelligent building air-conditioning system - Google Patents

Interactive power-saving capacity evaluation method for intelligent building air-conditioning system Download PDF

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CN105429147A
CN105429147A CN201510899743.1A CN201510899743A CN105429147A CN 105429147 A CN105429147 A CN 105429147A CN 201510899743 A CN201510899743 A CN 201510899743A CN 105429147 A CN105429147 A CN 105429147A
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conditioning system
air
interactive
max
saving
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CN105429147B (en
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黄明山
李如意
刘永光
王军
胡东方
冯二浩
郝长征
徐景涛
歹志阳
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State Grid Corp of China SGCC
Xuji Group Co Ltd
Weifang Power Supply Co of State Grid Shandong Electric Power Co Ltd
Henan Xuji Instrument Co Ltd
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State Grid Corp of China SGCC
Xuji Group Co Ltd
Weifang Power Supply Co of State Grid Shandong Electric Power Co Ltd
Henan Xuji Instrument Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention relates to an interactive power-saving capacity evaluation method for an intelligent building air-conditioning system. The interactive power-saving capacity evaluation method comprises the following steps: 1) establishing characteristic values for representing interactive power-saving capacity, namely maximum interactive power-saving potential delta Pmax and maximum interactive power-saving potential maintaining time Tmax; 2) calculating the maximum interactive power-saving potential delta Pmax and the maximum interactive power-saving potential maintaining time Tmax according to electrical quantities before and after implementing interactive power-saving measures; and 3) performing comprehensive evaluation on the interactive power-saving capacity of the intelligent building air-conditioning system according to the maximum interactive power-saving potential delta Pmax and the maximum interactive power-saving potential maintaining time Tmax. A power-saving capacity pre-evaluation method is provided before implementing the interactive power-saving measures for the evaluation of the interactive power-saving capacity of the intelligent building air-conditioning system, so that the method can guide the intelligent building to carry out the interactive power-saving measures for the air-conditioning systems.

Description

Intelligent building air-conditioning system interaction economize on electricity capacity evaluating method
Technical field
The invention belongs to field of energy-saving technology, be specifically related to a kind of intelligent building air-conditioning system amount of electricity saving appraisal procedure.
Background technology
The peak times of power consumption of torridity summer, the operation of user side air-conditioning is the important electric load causing electrical network breach.According to statistics, in the part big and medium-sized cities of China, the air conditioner load ratio of peak period in summer reaches 30% ~ 40%, and indivedual city is even more than 50%, and air conditioning energy consumption reaches more than 40% of building total energy consumption.The seasonality of this type of power load increases, and makes urban electric power supply peak period be difficult to satisfy the demands on the one hand, occurs power cuts to limit consumption, affect Consumer's Experience; On the other hand, Utilities Electric Co. need carry out the dilatation of corresponding proportion to electrical network infrastructure according to maximum load demand, thus reduces the utilance of grid equipment.
If fine-grained management can be carried out with regard to this type load, the peak clipping of electrical network peak period can be realized, and this is conducive to reducing electrical network own loss.
In fact, intelligent building air-conditioning system improves hot and cold demand to user, and have the feature of high-power, large time delay and demand flexibility, its energy requirements exists adjustable space at a certain specific time period, and this makes user participate in electrical network interaction becomes possibility.
China application number 201210236168.3 patent discloses a kind of control human thermal comfort sensation air conditioner and control method, this patent according to human comfort relevant parameter and according to predetermined PMV formula, obtain corresponding human thermal comfort sensation result of calculation; Optimum controling strategy is obtained according to result of calculation; The relevant operational mode of air conditioner is controlled, to realize air conditioner pleasant climate according to optimum controling strategy.This patent focuses on comfort level target, the operational mode of adjustment air conditioner, does not mention the assessment that user under certain control mode participates in electrical network interaction economize on electricity capability value.
China application number 201410110881.2 patent discloses a kind of method assessing flexible load interaction capability.Response characteristic, interaction effect, power grid security and economy four dimensions evaluation type flexible load interaction capability is divided into assess, for the assessment feature of each dimension, set up corresponding embodiments index, realize the interaction capability of comprehensive assessment flexible load, according to each embodiments index, provide and judge the interactive foundation on the size of the impact of systematic function, safety, economic dispatch each side.This patent focuses on the multiple constraint index according to electrical network itself, realizes the assessment of flexible load interaction capability, but also for the interactive capacity that just economizes on electricity provides concrete appraisal procedure.
Air conditioner load belongs to flexible load, can have certain delayed, storage capacity, cause it can participate in electrical network interaction, reach the object of electrical energy saving because it consumes the cold and hot of electric energy generation.And the interactive economize on electricity capacity of air-conditioning system is assessed, be conducive to instructing intelligent building to carry out the interactive power-saving measures of air-conditioning system, so, be badly in need of a kind of air-conditioning system interaction economize on electricity capacity evaluating method.
Summary of the invention
The invention provides intelligent building air-conditioning system interaction economize on electricity capacity evaluating method, to realize the assessment to the interactive economize on electricity capacity of intelligent building air-conditioning system, carry out the interactive power-saving measures of air-conditioning system to instruct intelligent building.
For solving the problems of the technologies described above, intelligent building air-conditioning system interaction economize on electricity capacity evaluating method of the present invention comprises the steps:
1) characteristic value characterizing interactive economize on electricity capacity is set up, i.e. maximum interactive energy conservation potential Δ P maxto hold time T with maximum interactive node potentiality max;
2) implement the electric parameters of front and back according to interactive power-saving measures, calculate maximum interactive energy conservation potential Δ P maxto hold time T with maximum interactive node potentiality max;
3) according to maximum interactive energy conservation potential Δ P maxto hold time T with maximum interactive node potentiality maxresult of calculation, to carrying out comprehensive evaluation by building air-conditioner system mutual economize on electricity capacity.
Described maximum interactive energy conservation potential Δ P maxcomputational process as follows:
1) the amount of electricity saving Δ P of the cold and hot storage characteristics of calculations of air conditioner system after interactive power-saving measures is implemented 1, air-conditioning system flow equalization distribute after amount of electricity saving Δ P 2and the grid loss amount Δ P reduced after implementing interactive power-saving measures 3;
2) according to Δ P 1, Δ P 2Δ P 3, calculate maximum interactive energy conservation potential Δ P max, i.e. Δ P max=Δ P 1+ Δ P 2+ Δ P 3.
Described maximum interactive node potentiality are held time T maxcomputational process as follows:
1) the heat Q that maximum interactive energy conservation potential can carry out exchanging is calculated, Q=cm Δ t=cm (t 0-t'), wherein, c is the specific heat of architecture indoor air, and m is the quality of architecture indoor air, and unit is kg, t 0for interaction economize on electricity front space temperature, t' is that the space temperature reached is expected in interactive economize on electricity afterwards;
2) according to maximum interactive energy conservation potential Δ P max, conversion efficiency of thermoelectric η and Q, calculate maximum interactive node potentiality and to hold time T max, i.e. T max=Q* η/Δ P max.
Described Δ P 1computing formula be: Δ P 1=P 1 0-P 1', wherein, P 1 0for the load value of the cold and hot storage characteristics of air-conditioning system before interactive power-saving measures is implemented, P 1' be the load value of the cold and hot storage characteristics of air-conditioning system after interactive power-saving measures is implemented.
Described Δ P 2computing formula be: wherein, for the load value of the circulating water pump before the distribution of air-conditioning system flow equalization, P ' 2for air-conditioning system flow equalization distributes the load value of Posterior circle water pump.
Described Δ P 3computing formula be: wherein, for the network load value before the interactive power-saving measures enforcement of air-conditioning system, Δ P ' 3for the network load value after the interactive power-saving measures enforcement of air-conditioning system.
Described calculating formula be: p n∝ q n 3, wherein, p nfor the load value of n-th circulating water pump in air-conditioning system, q nit is the flow of n-th circulating water pump.
Described P ' 2calculating formula be: P 2 ′ = ( q 1 + q 2 + ... q n n ) 3 ( k 1 + k 2 + ... + k n ) , Wherein, described k nfor constant, it is the proportionality coefficient of n-th circulating water pump load and discharge.
wherein, R 0for line resistance, for the load power factor before the interactive power-saving measures enforcement of air-conditioning system, for the load power factor after the interactive power-saving measures enforcement of air-conditioning system, U 0for the load point voltage before the interactive power-saving measures enforcement of air-conditioning system, U ' is the load point voltage after the interactive power-saving measures of air-conditioning system is implemented, S 0for the variation before the interactive power-saving measures enforcement of air-conditioning system, S ' is the variation after the interactive power-saving measures of air-conditioning system is implemented.
The invention has the beneficial effects as follows: the present invention, by setting up interactive economize on electricity capacitance features value, calculates characteristic value, realizes the assessment to the interactive economize on electricity capacity of intelligent building air-conditioning system according to the result of calculation of characteristic value.By implementing prerequisite for amount of energy saving Pre-Evaluation method to the interactive power-saving measures of air-conditioning system that is evaluated as of the interactive economize on electricity capacity of intelligent building air-conditioning system, intelligent building can be instructed to carry out the interactive power-saving measures of air-conditioning system.
Accompanying drawing explanation
Fig. 1 is the flow chart of the present embodiment appraisal procedure.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail.
The present embodiment appraisal procedure comprises the steps:
1) characteristic value characterizing interactive economize on electricity capacity is set up, i.e. maximum interactive energy conservation potential Δ P maxto hold time T with maximum interactive node potentiality max;
2) implement the electric parameters of front and back according to interactive power-saving measures, calculate maximum interactive energy conservation potential Δ P maxto hold time T with maximum interactive node potentiality max;
3) according to maximum interactive energy conservation potential Δ P maxto hold time T with maximum interactive node potentiality maxresult of calculation, to carrying out comprehensive evaluation by building air-conditioner system mutual economize on electricity capacity.
Maximum interactive energy conservation potential is Δ P max, refer to that air-conditioning system is except circulating water pump, Fresh air handling units are except operation, miscellaneous equipment is all in shut down condition.
The maximum interactive energy conservation potential duration is T max, under referring to the prerequisite maintaining the normal comfort level in space, the air-conditioning system maximum interactive energy conservation potential duration.
The interaction economize on electricity Capacity Assessment computational process of the present embodiment is as follows: Δ P max=Δ P 1+ Δ P 2+ Δ P 3
Δ P 1, Δ P 2, Δ P 3after being respectively the enforcement of interactive power-saving measures, the distribution of the cold and hot storage characteristics of air-conditioning system, air-conditioning flow equalization and the network load peak-valley difference caused thus reduce produced amount of electricity saving.
Δ P 1for the economize on electricity that the cold and hot storage characteristics of air-conditioning system causes after interactive power-saving measures is implemented, its computational process is as follows: Δ P 1=P 1 0-P 1'
P 1 0for the load value of the cold and hot storage characteristics of air-conditioning system before interactive power-saving measures is implemented, its occurrence is ambient temperature and humidity and P 1' the air-conditioning system load value of corresponding ambient temperature and humidity similar day.
P 1' be the load value of the cold and hot storage characteristics of air-conditioning system after interactive power-saving measures is implemented, its value is the load sum of Air Conditioning Cycle water pump, Fresh air handling units and not interruptible price hot-cool demand.
Δ P 2for air-conditioning system flow equalization distributes the economize on electricity caused, its computational process is as follows:
for the load value of the circulating water pump before the distribution of air-conditioning system flow equalization, calculating formula is: and p n∝ q n 3
P nfor the load value of n-th circulating water pump in air-conditioning system; q nit is the flow of n-th circulating water pump.
P ' 2for air-conditioning system flow equalization distributes the load value of Posterior circle water pump, calculating formula is: P 2 ′ = ( q 1 + q 2 + ... q n n ) 3 ( k 1 + k 2 + ... + k n ) .
K nfor constant, it is the proportionality coefficient of n-th circulating water pump load and discharge.
Δ P 3after implementing interactive power-saving measures, reduce because electrical network peak-valley difference reduces the grid loss caused, its computational process is as follows: ΔP 3 = ΔP 3 0 - ΔP 3 ′
for the network load value before the interactive power-saving measures enforcement of air-conditioning system;
Δ P ' 3for the network load value after the interactive power-saving measures enforcement of air-conditioning system.
Δ P 3concrete computational process be: wherein, R 0for line resistance, for the load power factor before the interactive power-saving measures enforcement of air-conditioning system, for the load power factor after the interactive power-saving measures enforcement of air-conditioning system, U 0for the load point voltage before the interactive power-saving measures enforcement of air-conditioning system, U ' is the load point voltage after the interactive power-saving measures of air-conditioning system is implemented, S 0for the variation before the interactive power-saving measures enforcement of air-conditioning system, S ' is the variation after the interactive power-saving measures of air-conditioning system is implemented.Above-mentioned computational process can refer to document " improving the analysis of power supply enterprise's benefit by peak load shifting method " (author: Wang Weihua, Zhang Huimin, Chen Fang), no longer elaborates here.
The described maximum interactive energy conservation potential duration is: T max=Q* η/Δ P max
η is conversion efficiency of thermoelectric, and visual actual conditions are selected, and its interval is (0,1).
Q can carry out the heat that exchanges for maximum interactive energy conservation potential, and computing formula is: Q=cm Δ t=cm (t 0-t').
C is the specific heat of architecture indoor air.
M is the quality of architecture indoor air, and unit is kg.
T 0for interaction economize on electricity front space temperature, t' is that the space temperature reached is expected in interactive economize on electricity afterwards.Its computational process, is as the criterion with ISO-PMV calculating formula.
Consequent save power calculating formula is: Δ W=Q* η.
The maximum energy conservation potential that technical staff can estimate out according to said method and maximum interactive energy conservation potential duration, can know in advance and be about to take which kind of power-saving measures to economize on electricity the most efficiently, to greatest extent, and not affect the normal operation of air-conditioning system.
Be presented above concrete execution mode, but the present invention is not limited to described execution mode.Basic ideas of the present invention are above-mentioned basic scheme, and for those of ordinary skill in the art, according to instruction of the present invention, designing the model of various distortion, formula, parameter does not need to spend creative work.The change carried out execution mode without departing from the principles and spirit of the present invention, amendment, replacement and modification still fall within the scope of protection of the present invention.

Claims (9)

1. intelligent building air-conditioning system interaction economize on electricity capacity evaluating method, is characterized in that, comprise the steps:
1) characteristic value characterizing interactive economize on electricity capacity is set up, i.e. maximum interactive energy conservation potential Δ P maxto hold time T with maximum interactive node potentiality max;
2) implement the electric parameters of front and back according to interactive power-saving measures, calculate maximum interactive energy conservation potential Δ P maxto hold time T with maximum interactive node potentiality max;
3) according to maximum interactive energy conservation potential Δ P maxto hold time T with maximum interactive node potentiality maxresult of calculation, to carrying out comprehensive evaluation by building air-conditioner system mutual economize on electricity capacity.
2. according to claim 1 intelligent building air-conditioning system interaction economize on electricity capacity evaluating method, it is characterized in that, described maximum interactive energy conservation potential Δ P maxcomputational process as follows:
1) the amount of electricity saving Δ P of the cold and hot storage characteristics of calculations of air conditioner system after interactive power-saving measures is implemented 1, air-conditioning system flow equalization distribute after amount of electricity saving Δ P 2and the grid loss amount Δ P reduced after implementing interactive power-saving measures 3;
2) according to Δ P 1, Δ P 2Δ P 3, calculate maximum interactive energy conservation potential Δ P max, i.e. Δ P max=Δ P 1+ Δ P 2+ Δ P 3.
3. intelligent building air-conditioning system interaction economize on electricity capacity evaluating method according to claim 1, it is characterized in that, described maximum interactive node potentiality are held time T maxcomputational process as follows:
1) the heat Q that maximum interactive energy conservation potential can carry out exchanging is calculated, Q=cm Δ t=cm (t 0-t'), wherein, c is the specific heat of architecture indoor air, and m is the quality of architecture indoor air, and unit is kg, t 0for interaction economize on electricity front space temperature, t' is that the space temperature reached is expected in interactive economize on electricity afterwards;
2) according to maximum interactive energy conservation potential Δ P max, conversion efficiency of thermoelectric η and Q, calculate maximum interactive node potentiality and to hold time T max, i.e. T max=Q* η/Δ P max.
4. according to claim 2 intelligent building air-conditioning system interaction economize on electricity capacity evaluating method, it is characterized in that, described Δ P 1computing formula be: wherein, for the load value of the cold and hot storage characteristics of air-conditioning system before interactive power-saving measures is implemented, P ' 1for the load value of the cold and hot storage characteristics of air-conditioning system after interactive power-saving measures is implemented.
5. according to claim 2 intelligent building air-conditioning system interaction economize on electricity capacity evaluating method, it is characterized in that, described Δ P 2computing formula be: wherein, for the load value of the circulating water pump before the distribution of air-conditioning system flow equalization, P ' 2for air-conditioning system flow equalization distributes the load value of Posterior circle water pump.
6. according to claim 2 intelligent building air-conditioning system interaction economize on electricity capacity evaluating method, it is characterized in that, described Δ P 3computing formula be: wherein, for the network load value before the interactive power-saving measures enforcement of air-conditioning system, Δ P ' 3for the network load value after the interactive power-saving measures enforcement of air-conditioning system.
7. according to claim 5 intelligent building air-conditioning system interaction economize on electricity capacity evaluating method, it is characterized in that, described in calculating formula be: p n∝ q n 3, wherein, p nfor the load value of n-th circulating water pump in air-conditioning system, q nit is the flow of n-th circulating water pump.
8. according to claim 7 intelligent building air-conditioning system interaction economize on electricity capacity evaluating method, it is characterized in that, described P ' 2calculating formula be: P 2 ′ = ( q 1 + q 2 + ... q n n ) 3 ( k 1 + k 2 + ... + k n ) , Wherein, described k nfor constant, it is the proportionality coefficient of n-th circulating water pump load and discharge.
9. according to claim 6 intelligent building air-conditioning system interaction economize on electricity capacity evaluating method, it is characterized in that, wherein, R 0for line resistance, for the load power factor before the interactive power-saving measures enforcement of air-conditioning system, for the load power factor after the interactive power-saving measures enforcement of air-conditioning system, U 0for the load point voltage before the interactive power-saving measures enforcement of air-conditioning system, U ' is the load point voltage after the interactive power-saving measures of air-conditioning system is implemented, S 0for the variation before the interactive power-saving measures enforcement of air-conditioning system, S ' is the variation after the interactive power-saving measures of air-conditioning system is implemented.
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CN109116775A (en) * 2018-08-07 2019-01-01 珠海格力电器股份有限公司 Energy consumption management method, device, storage medium and the electrical equipment of electrical equipment

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CN102778002A (en) * 2012-07-09 2012-11-14 广东美的电器股份有限公司 Air conditioner for controlling thermal comfort feeling of human body and control method
CN103872680A (en) * 2014-03-24 2014-06-18 国家电网公司 Method for evaluating interaction capacity of flexible loads
CN104158289A (en) * 2014-07-24 2014-11-19 许昌学院 System and method for intelligent and progressive electricity utilization management based on intelligent and progressive utilization management device

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CN102778002A (en) * 2012-07-09 2012-11-14 广东美的电器股份有限公司 Air conditioner for controlling thermal comfort feeling of human body and control method
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