CN104967118A - Energy consumption transfer model and public institution energy utilization analysis method based on the model - Google Patents

Energy consumption transfer model and public institution energy utilization analysis method based on the model Download PDF

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CN104967118A
CN104967118A CN201510328934.2A CN201510328934A CN104967118A CN 104967118 A CN104967118 A CN 104967118A CN 201510328934 A CN201510328934 A CN 201510328934A CN 104967118 A CN104967118 A CN 104967118A
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energy
loss
input
utilization
public organizations
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刘洪�
赵洪磊
蒋菱
崔文婷
刘建宇
张世宇
葛少云
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Tianjin University
State Grid Tianjin Electric Power Co Ltd
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Tianjin University
State Grid Tianjin Electric Power Co Ltd
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Abstract

An energy consumption transfer model and a public institution energy utilization analysis method based on the model. The energy consumption transfer model comprises: energy input which indicates a plurality of types of energy EI inputted to public institutions; energy loss which indicates loss EL of the inputted energy during gradient utilization; and energy consumption which indicates energy flow EC of the inputted energy at each terminal load in the public institutions. The public institution energy utilization analysis method comprises: an energy utilization present situation analysis step comprising energy input analysis and energy utilization analysis; an energy utilization weak link determination step for excavating weak links of the public institutions in an energy input aspect and an energy utilization aspect from two aspects of energy input and energy utilization; and an energy utilization efficiency improving measure proposing step for targetedly proposing improving measures of energy utilization efficiency of the public institutions from the weak links in two aspects of energy input and energy utilization by aiming at the energy utilization weak links. The energy consumption transfer model and the public institution energy utilization analysis method based on the model provided by the present invention provide support for global optimal utilization of energy of the public institutions, thereby facilitating improvement of energy optimization management level of the public institutions, and facilitating energy saving and emission reduction of the public institutions.

Description

Energy consumption TRANSFER MODEL and the public organizations' using energy source analytical method based on this model
Technical field
The present invention relates to a kind of energy source optimization management method.Particularly relate to a kind of energy consumption TRANSFER MODEL and the public organizations' using energy source analytical method based on this model
Background technology
Along with the aggravation of global energy crisis, energy-conservation become human social development must faced by problem.The energy scenario of China is also pessimistic, and energy reserve is not enough on the one hand, and the per-capita quantity of the resources is very limited; Energy resource consumption is large on the other hand, and efficiency of energy utilization is low.Along with the propelling of Urbanization in China, Inst building energy consumption problem has become an important component part in China's energy consumption structure.How effectively to promote Inst efficiency of energy utilization, become the major issue and technological difficulties that receive much concern.
Research at present in public organizations' efficiency of energy utilization is broadly divided into two classes.One class analyses in depth for the load (as air conditioner load) that Inst a certain or multiple energy consumption is maximum, energy-saving excavation technology and means; Another kind of is carry out energy-saving analysis for a certain concrete public organizations (as hospital, market).Lack the public organizations usings energy source analysis of the whole energy flow process from energy input and Energy harvesting.Therefore, in the urgent need to furtheing investigate Inst using energy source, build the energy consumption TRANSFER MODEL containing whole energy flow process, and propose a kind of new public organizations' using energy source analytical method based on this model, thus provide fundamental basis for Inst efficiency of energy utilization lifting and energy source optimization manage.
In sum, build energy consumption TRANSFER MODEL and the public organizations' using energy source analytical method based on this model, be practical problem urgently to be resolved hurrily, there is good theory value and using value.
Summary of the invention
Technical problem to be solved by this invention is, there is provided a kind of to provide support for the global optimization of public organizations' energy utilizes, be conducive to promoting the energy consumption TRANSFER MODEL of public organizations' energy source optimization managerial skills and the public organizations' using energy source analytical method based on this model.
The technical solution adopted in the present invention is: a kind of energy consumption TRANSFER MODEL, comprises, energy input, energy loss and energy ezpenditure three part, and described energy input is the polytype energy E to public organizations' input i; Described energy loss is the loss E of the energy when cascade utilization of input l, described energy ezpenditure is the energy flow E of the energy each end loads in public organizations of input c, wherein:
E I＝E C+E L(1)。
Described energy input includes mains supply, distributed power source and fossil fuel, is expressed as:
E I＝E P+E D+E F(2)
In formula, E prepresent electrical network input, E drepresent distributed power source input, E frepresent fossil fuel energy input.
Described distributed power source includes wind power generation and photovoltaic generation.
Described energy loss comprises the loss of net level, the loss of feeder line level and the loss of distribution transforming level, is expressed as:
E L = Σ j = 1 n E j - - - ( 4 )
In formula, E jj=1,2 ..., n, wherein, E jrepresent the loss of energy at different level different elements, j represents element number, and n represents number of elements, and described net level loss includes line loss, and described feeder line level loss and the loss of distribution transforming level include line loss and transformer loss.
Described line loss be energy inlet flow when wire with the power loss that form of thermal energy distributes, computing formula is shown in that formula is as follows:
Δ p = R P 2 + Q 2 U 2 - - - ( 5 )
In formula, △ p represents line loss, and P, Q are respectively the active power and reactive power that flow through route; U is the voltage that route records with P, Q same point; R is the resistance of circuit, relevant with the length of the cross section of wire, the material of wire and circuit.
Described transformer loss refers to the power loss that electric energy distributes with form of thermal energy when flowing through transformer, and computing formula is as follows:
△P T＝P Fe+P cu＝P 0+β 2P k(6)
In formula, △ P tindication transformer loss, P fefor iron loss, P cufor copper loss, P 0for no-load loss, P kfor nominal load loss, β is average load coefficient.
The energy flow E of each end loads in described energy ezpenditure cbe expressed as:
E C = Σ i = 1 n E i - - - ( 3 )
In formula, E ii=1,2 ..., m, wherein, E irepresent the consumption of energy at each end loads, i represents that end loads is numbered, and m represents end loads quantity.
Based on public organizations' using energy source analytical method of energy consumption TRANSFER MODEL, comprise the steps:
1) energy utilization situation analysis, comprise energy input to analyze and Energy harvesting analysis, wherein, the power output analysis comprised each energy source of public organizations is analyzed in energy input, Energy harvesting analysis comprises the analysis to all kinds of public organizations energy ezpenditure, and described public organizations include: market, hotel, office building and hospital;
2) determine using energy source weak link, from energy input and Energy harvesting two aspects, excavate the weak link of public organizations in energy input and in Energy harvesting;
3) propose efficiency of energy utilization measure for improvement, for using energy source weak link, from the weak link of energy input and Energy harvesting two aspects, propose the measure for improvement of Inst efficiency of energy utilization targetedly.
Step 2) described in the weak link of energy input aspect, comprise: the energy to public organizations' input has unstable power, the energy of input can not be made full use of by public organizations, the weak link of described Energy harvesting aspect refers to the end loads in all kinds of public organizations according to the sequence of energy consumption accounting size, the Energy harvesting of front N item end loads got energy consumption accounting and be more than or equal to 70% is the weak link of Energy harvesting aspect, wherein N be more than or equal to 1 integer.
Step 3) described in the measure for improvement of efficiency of energy utilization, be at least propose a measure for improvement for each weak link.
Energy consumption TRANSFER MODEL of the present invention and the public organizations' using energy source analytical method based on this model, can simultaneously from energy input and using energy source two angles, present situation analysis is utilized to Inst, thus excavate the weak link of public organizations' using energy source, and then public organizations' efficiency of energy utilization measure for improvement is targetedly proposed.The present invention can provide support for the global optimization of public organizations' energy utilizes, and is conducive to promoting public organizations' energy source optimization managerial skills, promotes Inst energy-saving and emission-reduction and sustainable development.
Accompanying drawing explanation
Tu1Shi public organizations energy consumption TRANSFER MODEL;
Tu2Shi public organizations using energy source analysis process;
Fig. 3 is blower fan power output oscillogram;
Fig. 4 is photovoltaic power output oscillogram;
Fig. 5 is energy storage charge-discharge electric power oscillogram.
Embodiment
Be described in detail to energy consumption TRANSFER MODEL of the present invention and based on public organizations' using energy source analytical method of this model below in conjunction with embodiment and accompanying drawing.
First energy consumption TRANSFER MODEL of the present invention and the public organizations' using energy source analytical method based on this model are set up Inst energy consumption TRANSFER MODEL.Inst energy consumption TRANSFER MODEL comprises energy input and Energy harvesting, and Energy harvesting is divided into again energy ezpenditure and energy loss.Public organizations' energy input comprises the polynary energy such as mains supply, distributed power source and fossil fuel; Energy harvesting is the energy flow that in public organizations, the energy is undertaken by cascade utilization and partition losses; The energy that energy ezpenditure consumes for all kinds of public organizations end loads, mainly comprises the energy that the loads such as illumination, air-conditioning, heating system, office equipment, water supply and sewerage system, elevator consume; Energy loss is the loss of the energy in cascade utilization process, comprises the loss of net level, feeder line level and distribution transforming level, can be divided into line loss and transformer loss.
As shown in Figure 1, energy consumption TRANSFER MODEL of the present invention, comprises, energy input, energy loss and energy ezpenditure three part, and described energy input is the polytype energy E to public organizations' input i; Described energy loss is the loss E of the energy when cascade utilization of input l, described energy ezpenditure is the energy flow E of the energy each end loads in public organizations of input c, wherein:
E I＝E C+E L(1)。
Described energy input includes the polynary energy such as mains supply, distributed power source and fossil fuel, is expressed as:
E I＝E P+E D+E F(2)
In formula, E prepresent electrical network input, E drepresent distributed power source input, E frepresent fossil fuel energy input.
Described distributed power source includes wind power generation and photovoltaic generation.
Described energy loss comprises the loss of net level, the loss of feeder line level and the loss of distribution transforming level, is expressed as:
E L = Σ j = 1 n E j - - - ( 4 )
In formula, E jj=1,2 ..., n, wherein, E jrepresent the loss of energy at different level different elements, j represents element number, and n represents number of elements, and described net level loss includes line loss, and described feeder line level loss and the loss of distribution transforming level include line loss and transformer loss.
Described line loss be energy inlet flow when wire with the power loss that form of thermal energy distributes, computing formula is shown in that formula is as follows:
Δ p = R P 2 + Q 2 U 2 - - - ( 5 )
In formula, △ p represents line loss, and P, Q are respectively the active power and reactive power that flow through route; U is the voltage that route records with P, Q same point; R is the resistance of circuit, relevant with the length of the cross section of wire, the material of wire and circuit.
Described transformer loss refers to the power loss that electric energy distributes with form of thermal energy when flowing through transformer, and computing formula is as follows:
△P T＝P Fe+P cu＝P 0+β 2P k(6)
In formula, △ P tindication transformer loss, P fefor iron loss, P cufor copper loss, P 0for no-load loss, P kfor nominal load loss, β is average load coefficient.
The energy flow E of each end loads in described energy ezpenditure cbe expressed as:
E C = Σ i = 1 n E i - - - ( 3 )
In formula, E ii=1,2 ..., m, wherein, E irepresent the consumption of energy at each end loads, i represents that end loads is numbered, and m represents end loads quantity.
Public organizations' using energy source analytical method based on energy consumption TRANSFER MODEL of the present invention, comprises the steps:
1) energy utilization situation analysis, comprise energy input to analyze and Energy harvesting analysis, wherein, the power output analysis comprised each energy source of public organizations is analyzed in energy input, Energy harvesting analysis comprises the analysis to all kinds of public organizations energy ezpenditure, and described public organizations include: market, hotel, office building and hospital;
As shown in Figure 2:
(1) energy consumption system in market is primarily of illuminator and air-conditioning system composition.First, due to requirements such as commodity displaying, market room lighting and commodity lighting load large, duration is long, and some sales counter is due to the needs of display goods, enhance the other types light fixture that some illumination are high, cause the increase of room lighting intensity and power dissipation density, too increase air conditioner load simultaneously.Secondly, market densely populated place degree is high, and internal calorific power is large, and the heat load from human body becomes a pith of market air-conditioning system load; The hot humidity load density of market building is large, and cause to bring into operation summer of market air-conditioning system need shift to an earlier date relative to other building air conditionings, therefore its air conditioning energy consumption proportion is larger on date.It is comparatively large that equipment cooling, human-body radiating and lighting load etc. cause market indoor airflow, therefore needs air-conditioning, ventilation the whole year.
(2) energy consumption system of hospital forms primarily of air-conditioning system, illuminator and heating system.First, hospital has a large amount of Medical Devices and the illumination of numerous wards, and medical equipment in hospital scale is large, and conditions for equipment use requires high, and air conditioner ventilation is used can be also large.Secondly, febris nosocomialis water consumption is large, and heating system is used can be also large.
(3) energy consumption system of office building is primarily of air-conditioning, illumination and office equipment composition.With other public organizations unlike, office equipment energy consumption is a part very important in Office Building Energy Consumption, is embodied in the subitem of light socket system in metering separate directive/guide---in jack system.With desktop computer, photocopier, facsimile machine, notebook computer etc. can be generally included by equipment in the jack system of office building, be characterized in that single equipment energy input is little, but quantity is more, and without unified operation control strategy, therefore consumes energy larger.
(4) energy consumption system in hotel is primarily of system compositions such as air-conditioning, illumination, water supply and drainage and elevators.First, because hotel administration needs, air-conditioning and the illuminator in hotel are almost run comprehensively.Secondly, due to hotel for guest provides hot water service, therefore water supply and sewerage system power consumption is generally higher than other public organizations.Finally, hotel's Lift usage ratio is high, so its power consumption is also higher.
2) determine using energy source weak link, from energy input and Energy harvesting two aspects, excavate the weak link of public organizations in energy input and in Energy harvesting;
The weak link of described energy input aspect, comprise: the energy to public organizations' input has unstable power, the energy of input can not be made full use of by public organizations, the weak link of described Energy harvesting aspect refers to the end loads in all kinds of public organizations according to the sequence of energy consumption accounting size, the Energy harvesting of front N item end loads got energy consumption accounting and be more than or equal to 70% is the weak link of Energy harvesting aspect, wherein N be more than or equal to 1 integer.
3) propose efficiency of energy utilization measure for improvement, for using energy source weak link, from the weak link of energy input and Energy harvesting two aspects, propose the measure for improvement of Inst efficiency of energy utilization targetedly.The measure for improvement of described efficiency of energy utilization at least proposes a measure for improvement for each weak link.
Provide instantiation below:
With the intelligent grid business hall of ZX ecological city for example, based on Inst energy consumption TRANSFER MODEL, carry out the using energy source analysis of intelligent grid business hall, and propose the efficiency of energy utilization measure for improvement of intelligent grid business hall targetedly.
(1) energy utilization situation and weak link are determined
1) energy source analysis and weak link are determined
The energy of intelligent grid business hall mainly from mains supply, along with the development of distributed power source and the demand of energy-saving and emission-reduction, intelligent grid business hall using distributed power source also as important energy sources.The low-pressure stage micro-grid system be made up of wind-powered electricity generation, photovoltaic generation, energy storage device, lighting load and electric vehicle alternating-current charging pile has been built in intelligent grid business hall.Choose three typical days (being respectively on May 1st, 2012, on June 8th, 2012 and on July 15th, 2012), according to the actual operating data collected, analyze the output power of power supply situation of these three typical days, blower fan power output oscillogram as shown in Figure 3, photovoltaic power output oscillogram as shown in Figure 4, energy storage charge-discharge electric power oscillogram as shown in Figure 5.
Wherein the photovoltaic on June 8th, 2012 wattmeter of " abandoning light " is as table 1, and the battery state of charge on May 1st, 2012 is as table 2.
Table 1 typical case day B photovoltaic wattmeter of " abandoning light "
Table 2 typical case day A battery state of charge
Time (h) 0 1 2 3 4 5 6 7
Battery state of charge (%) 81.19 82.19 83.69 82.94 83.65 85.75 86.59 87.15
Time (h) 8 9 10 11 12 13 14 15
Battery state of charge (%) 87.79 95.9 98.9 99.9 99.9 99.9 99.9 99.9
Time (h) 16 17 18 19 20 21 22 23
Battery state of charge (%) 99.9 99.9 99.29 95.59 91.54 87 81.84 75.84
According to above analysis, the weak link of known intelligent grid business hall in energy input is as follows:
(1) photovoltaic of intelligent grid business hall microgrid goes out fluctuation comparatively greatly, and optical phenomenon is abandoned in existence, and energy utilization rate has greater room for improvement;
(2) wind speed of intelligent grid business hall microgrid is very low, and the wind power system of business hall microgrid is exerted oneself very little;
(3) energy-storage system of intelligent grid business hall microgrid there will be when illumination is sufficient and overcharges phenomenon, causes energy waste and affects service lifetime of accumulator; And battery state of charge SOC lower limit set is too high, be 70%, though there will not be the state of putting, the peak of power consumption period in night, storage battery exited electric discharge too early, was powered by outer net, can affect the economy of microgrid.
2) Energy harvesting analysis and weak link are determined
The main loads of intelligent grid business hall comprises elevator, illumination, fire-fighting, air-conditioning, general power supply, machine room, water pump and other loads, each type load at each type load power consumption in business hall on November 10th, 13 days 1 September in 2014 in table 3.
The each type load power consumption in table 3 business hall
Overload Class Power consumption (kWh) Proportion (%)
Elevator 641.67 0.37
Illumination 84229.41 48.34
Heat 0.07 0.00
Fire-fighting 182.01 0.10
Air-conditioning 22879.54 13.13
General power supply 13032.25 7.48
Machine room 46512.2 26.69
Water pump 2631.43 1.51
Other 4140.46 2.38
Summation 174249.04 100
The weak link of Energy harvesting aspect as shown in Table 3, namely lighting load, machine room load and air conditioner load are maximum three type loads of energy consumption accounting and energy consumption accounting and be 88.16%, are the important object that efficiency promotes.
(2) efficiency measure for improvement
1) the efficiency measure for improvement of energy input angle
(1) microgrid control system is promoted to the microclimate predictive ability of intensity of illumination and photovoltaic generation predictive ability;
(2) photovoltaic is carried out more meticulous grouping;
(3) suitably increase load, avoid " abandoning light " phenomenon;
(4) when policy allows, phase out the inverse probability restriction of microgrid, unnecessary electric energy is fully surfed the Net;
(5) suitably reduce the SOC lower limit of storage battery, peak of power consumption at night period storage battery can be discharged more and to power to reduce outer net, when noon, intensity of illumination was large, can charge to reduce to overcharge the time more.
2) the efficiency measure for improvement of Energy harvesting angle
(1) lighting load efficiency measure for improvement
A set of intelligent illuminating system is built in suggestion.
(2) machine room load efficiency measure for improvement
Adopt the information technoloy equipment of green energy conservation; Adopt high energy efficiency ratio air-conditioning equipment; Make full use of outdoor new wind and carry out machine room humiture adjustment.
(3) air conditioner load efficiency measure for improvement
Introduce central air conditioner intelligent control system; Appropriate application nature and mechanical draft; Reduce lighting load.

Claims (10)

1. an energy consumption TRANSFER MODEL, is characterized in that, comprises, energy input, energy loss and energy ezpenditure three part, and described energy input is the polytype energy E to public organizations' input i; Described energy loss is the loss E of the energy when cascade utilization of input l, described energy ezpenditure is the energy flow E of the energy each end loads in public organizations of input c, wherein:
E I＝E C+E L(1)。
2. energy consumption TRANSFER MODEL according to claim 1, is characterized in that, described energy input includes mains supply, distributed power source and fossil fuel, is expressed as:
E I＝E P+E D+E F(2)
In formula, E prepresent electrical network input, E drepresent distributed power source input, E frepresent fossil fuel energy input.
3. energy consumption TRANSFER MODEL according to claim 2, is characterized in that, described distributed power source includes wind power generation and photovoltaic generation.
4. energy consumption TRANSFER MODEL according to claim 1, is characterized in that, described energy loss comprises the loss of net level, the loss of feeder line level and the loss of distribution transforming level, is expressed as:
E L = Σ j = 1 n E j - - - ( 4 )
In formula, E jj=1,2 ..., n, wherein, E jrepresent the loss of energy at different level different elements, j represents element number, and n represents number of elements, and described net level loss includes line loss, and described feeder line level loss and the loss of distribution transforming level include line loss and transformer loss.
5. energy consumption TRANSFER MODEL according to claim 4, is characterized in that, described line loss be energy inlet flow when wire with the power loss that form of thermal energy distributes, computing formula is shown in that formula is as follows:
Δ p = R P 2 + Q 2 U 2 - - - ( 5 )
In formula, △ p represents line loss, and P, Q are respectively the active power and reactive power that flow through route; U is the voltage that route records with P, Q same point; R is the resistance of circuit, relevant with the length of the cross section of wire, the material of wire and circuit.
6. energy consumption TRANSFER MODEL according to claim 4, is characterized in that, described transformer loss refers to the power loss that electric energy distributes with form of thermal energy when flowing through transformer, and computing formula is as follows:
△P T＝P Fe+P cu＝P 0+β 2P k(6)
In formula, △ P tindication transformer loss, P fefor iron loss, P cufor copper loss, P 0for no-load loss, P kfor nominal load loss, β is average load coefficient.
7. energy consumption TRANSFER MODEL according to claim 1, is characterized in that, the energy flow E of each end loads in described energy ezpenditure cbe expressed as:
E C = Σ i = 1 n E i - - - ( 3 )
In formula, E ii=1,2 ..., m, wherein, E irepresent the consumption of energy at each end loads, i represents that end loads is numbered, and m represents end loads quantity.
8., based on public organizations' using energy source analytical method of the energy consumption TRANSFER MODEL described in any one of claim 1-7, it is characterized in that, comprise the steps:
1) energy utilization situation analysis, comprise energy input to analyze and Energy harvesting analysis, wherein, the power output analysis comprised each energy source of public organizations is analyzed in energy input, Energy harvesting analysis comprises the analysis to all kinds of public organizations energy ezpenditure, and described public organizations include: market, hotel, office building and hospital;
2) determine using energy source weak link, from energy input and Energy harvesting two aspects, excavate the weak link of public organizations in energy input and in Energy harvesting;
3) propose efficiency of energy utilization measure for improvement, for using energy source weak link, from the weak link of energy input and Energy harvesting two aspects, propose the measure for improvement of Inst efficiency of energy utilization targetedly.
9. the public organizations' using energy source analytical method based on energy consumption TRANSFER MODEL according to claim 8, it is characterized in that, step 2) described in the weak link of energy input aspect, comprise: the energy to public organizations' input has unstable power, the energy of input can not be made full use of by public organizations, the weak link of described Energy harvesting aspect refers to the end loads in all kinds of public organizations according to the sequence of energy consumption accounting size, the Energy harvesting of front N item end loads got energy consumption accounting and be more than or equal to 70% is the weak link of Energy harvesting aspect, wherein N be more than or equal to 1 integer.
10. the public organizations' using energy source analytical method based on energy consumption TRANSFER MODEL according to claim 8, is characterized in that, step 3) described in the measure for improvement of efficiency of energy utilization, be at least propose a measure for improvement for each weak link.
CN201510328934.2A 2015-06-15 2015-06-15 Energy consumption transfer model and public institution energy utilization analysis method based on the model Pending CN104967118A (en)

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Application publication date: 20151007