CN104675458A - Thermoelectricity combined supply type compressed air energy storage system and method for back pressure type thermoelectric unit - Google Patents

Abstract

The invention discloses a thermoelectricity combined supply type compressed air energy storage system and a thermoelectricity combined supply type compressed air energy storage method for a back pressure type thermoelectric unit. The system comprises the back pressure type thermoelectricity cogeneration unit and a heat insulation compressed air energy storage system. During the electricity consumption valley time period at night, a compressed air energy storage device is used for storing redundant electric energy by compression, and heat generated in an air compression process is supplied to the thermoelectricity cogeneration unit through a heat exchange device; during the electricity consumption peak time period in the day, compressed air is expanded to generate power and absorbs the redundant heat generated by the thermoelectricity cogeneration unit. According to the system and the method, the electric energy is stored by the compressed air, and the heat-to-electricity ratio of the back pressure type thermoelectric unit can be regulated in the air compression and release processes, so that the peak load regulation capacity of the thermoelectricity cogeneration unit is improved; compared with the existing single-electric-energy storage system, the system disclosed by the invention has the advantage that under the same energy storage capacity, the system can provide a larger wind-power consumption space.

Description

The cogeneration type compressed-air energy-storage system of back pressure type thermoelectricity unit and method

Technical field

The invention belongs to clean energy resource technical field of comprehensive utilization, relate to a kind of cogeneration type compressed-air energy-storage system and method for back pressure type thermoelectricity unit.

Background technique

Along with Wind Power In China develops scale continuous enlargement, wind-electricity integration runs and dissolve in market becomes the key factor of restriction Wind Power Development.China's wind-powered electricity generation compares three northern areas of China, concentrated area, winter, nighttime wind speed was very large, but night, electrical load requirement was lower, because the heat supply in winter phase is for ensureing heating demand, cogeneration units majority operates in the pattern of " electricity determining by heat ", and particularly for the back pressure type thermoelectricity unit existed a large amount of in thermoelectricity plant, it exports hotspot stress and fixes, be difficult to participate in peak regulation, seriously when causing low ebb abandon wind phenomenon.

Along with the development of energy storage technology, utilize energy storage to carry out " peak load shifting " wind-powered electricity generation, store unnecessary wind-powered electricity generation when electric load low ebb at night, discharge during electric load peak by day, become the effective means of the digestion capability improving wind-powered electricity generation.Particularly compressed air energy storage technology has that energy storage cost is low because of it, environmental friendliness, becomes without the advantage of phase transformation loss the extensive energy storage technology received much concern in recent years.

Document " wind power based on compressed-air energy storage regulates and performance analysis " proposes a kind of compressed air energy storage technology being applied to wind energy turbine set, Chinese invention patent CN201210153370 also proposes a kind of tandem compressed-air energy-storage system that can be used in wind energy turbine set, because system is with heat accumulation and recuperating device, therefore, it is possible to lower useful power contained in system external circle discharges heat to greatest extent, reclaim liberated heat in compressor compresses process, improve the thermal efficiency of system.

Chinese invention patent CN201310614128 mentions the power generation system of a kind of wind-power electricity generation, compressed-air energy storage, thermal power generation one, this system utilizes thermal power plant's Steam Actuation compressor compresses air energy storage at low power consumption, and rush hour, expansion power generation utilized thermal power plant's high temperature furnace slag preheating expanded air to improve system effectiveness simultaneously.

But the above-mentioned method utilizing compressed-air energy storage to improve wind electricity digestion all only relates to the storage of single electric energy, and the hotspot stress of existing cogeneration units can not regulated to combine by energy storage, to improve the peak modulation capacity of thermoelectricity unit self, the stored energy capacitance needed under reducing wind-powered electricity generation of dissolving on an equal basis.

Summary of the invention

Object of the present invention is exactly to solve the problem, a kind of cogeneration type compressed-air energy-storage system and method for back pressure type thermoelectricity unit are provided, during it has solution Winter heat supply, the wind-powered electricity generation that cogeneration units is run the contradiction between wind-electricity integration and caused is forced to abandon wind problem advantage in a large number.

To achieve these goals, the present invention adopts following technological scheme:

A cogeneration type compressed-air energy-storage system for back pressure type thermoelectricity unit, comprising: cogeneration units and adiabatic compression air energy storage systems;

Described cogeneration units comprises thermoelectricity unit boiler, the output terminal of described thermoelectricity unit boiler is divided into two branch roads, wherein a branch road is connected with the input end of heat user by steam turbine, an other branch road is connected with the input end of heat user by thermoelectricity unit steam converter valve, and described steam turbine is connected with generator; The output terminal of described user is connected with the input end of thermoelectricity unit boiler by the second vapor-water heat exchanger;

Described adiabatic compression air energy storage systems comprises the compressor, the second vapor-water heat exchanger, gas holder, the first vapor-water heat exchanger, turbine expansion equipment, first clutch, generator motor, the second clutch that connect successively, and described second clutch is connected with compressor;

Described heat user is in parallel with the first vapor-water heat exchanger, and the input pipeline of heat user and the first vapor-water heat exchanger is also provided with steam regulation valve;

Compressed-air energy-storage system and cogeneration units carry out the coupling of electric energy and heat energy: to cogeneration units heat supply, can absorb the heat energy of cogeneration units during the generating of release air during compressed-air energy-storage system compressed-air energy storage.

Described compressor exports high pressure-temperature air and carries out heat exchange by the backwater end of the second vapor-water heat exchanger and thermoelectricity unit boiler by the road, thus heats before entering thermoelectricity unit boiler heat supply backwater.

Described first vapor-water heat exchanger connects the steam output circuit of the high pressure airline before entering turbine expansion equipment and steam turbine, thus steam-turbine heat can be utilized to heat the gas before entering turbine expansion equipment.

A kind of cogeneration type compressed-air energy-storage system regulating method of back pressure type thermoelectricity unit:

When network load is at a low ebb, wind-powered electricity generation generating is in rush hour, and compressed-air energy storage is in compressed energy-storage pattern, part wind-powered electricity generation can be converted to high-pressure air can store; The high pressure-temperature air simultaneously produced in compression process heats the backwater path of heat supply pipeline after the second vapor-water heat exchanger, reduce with this heat that hot online group of turbine end need to export, thus heat connection power generator turbine provides extra online space for wind-powered electricity generation;

When network load peak, wind power is at a low ebb, gas holder release high-pressure air expansion power generation, inflation process mesohigh gas absorbs the heat of thermoelectricity power generator turbine by the first vapor-water heat exchanger and is converted into electric energy simultaneously, thus cogeneration units exports electric energy for peak regulation.

A cogeneration type compressed-air energy-storage system regulating method for back pressure type thermoelectricity unit, comprises the steps:

Step (1): obtain wind-powered electricity generation prediction output power, thermal load demands prediction data and the electrical load requirement prediction data in next scheduling time section T;

Step (2): the wind power equivalence coal consumption amount of dissolving according to the coal consumption amount of t back pressure type thermoelectricity unit, t and compressed-air energy-storage system t equivalence power consumption arrange system goal function;

Step (3): arrange constraint conditio, according to system goal function and the constraint conditio of step (2), solves any time adiabatic compression air energy storage systems and the optimum output power of cogeneration units; Described constraint conditio comprises electric load Constraints of Equilibrium, heat load balance constraint, cogeneration units process constraint, unit ramping rate constraints and adiabatic compression air energy storage systems capacity-constrained.

The step of described step (2) is:

Heat supply coal consumption amount for back pressure type cogeneration units is expressed as the quadratic form of generated output:

$C_1(i,t)=a_i{\left(P_{e1,i}^t\right)}^2+b_i{p}_{e1,i}^t+c_i---\left(1\right);$

In formula: C ₁(i, t) represents the coal consumption amount of t back pressure type thermoelectricity unit, a _i, b _i, c _ifor the coal consumption coefficient of back pressure type thermoelectricity unit i; be the generated output of i-th back pressure type thermoelectricity unit in t;

The wind-powered electricity generation part of dissolving without the need to consume fuel, so t is dissolved wind-powered electricity generation consume equivalent coal consumption amount C ₂(t) be

C ₂(t)＝0 (2)；

Inevitably loss is caused in adiabatic compression air energy storage systems working procedure, if adiabatic compression air energy storage systems energy storage efficiency is η, then compressed-air energy-storage system t equivalence power consumption C ₃(t) be:

$C_3\left(t\right)=(1-\mathrm{\η})C_{\mathrm{ave}}{p}_{e3}^t---\left(3\right)$

C in formula _avefor the average energy consumption of whole system specific power, for adiabatic compression air energy storage systems is at the generated output of t;

P _e1represent back pressure thermoelectricity unit generated output, p _e2represent the wind power of dissolving, p _e3represent compressed-air energy-storage system generated output;

To sum up, setting up system goal function is:

$C\left(t\right)=\underset{t=1}{\overset{T}{\mathrm{\Σ}}}\{\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{C}_1(i,t)p_{e1,i}^t+C_2\left(t\right)p_{e2}^t+C_3\left(t\right)p_{e3}^t\}---\left(4\right)$

Wherein, the total consumption of coal amount that C (t) is whole system, C ₁(i, t) represents the coal consumption amount of t back pressure type thermoelectricity unit, C ₂t wind power equivalence coal consumption amount that () is dissolved for t, C ₃t () is compressed-air energy-storage system t equivalence power consumption, represent the electric power of i-th thermoelectricity unit in t, represent the wind-powered electricity generation electric power of dissolving in t, represent the electric power of compressed-air energy-storage system t.

The electric load Constraints of Equilibrium of described step (3) and heat load balance constraint:

$\left\{\begin{array}{c}\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{P}_{e1,i}^t+P_{e2}^t+P_{e3}^t=P_{\mathrm{De}}^t\\ P_{h1,i}^t+c_v{p}_{e3}^t\≥P_{\mathrm{Dh}}^t\end{array}\right.---\left(5\right)$

In formula for t equivalent electric load power, for t heat load power, c _vfor adiabatic compression air energy storage systems hotspot stress.

The cogeneration units units limits of described step (3):

$\left\{\begin{array}{c}{P}_{e1,i}^t=c_m{P}_{h,i}^t+K_i\\ P_{e1,\min ,i}\≤P_{e1,i}^t\≤P_{e1,\max ,i}\end{array}\right.---\left(6\right)$

Wherein, c _mrepresent the hotspot stress of cogeneration units, K _ifor constant, P _{e1, min, i}gain merit for cogeneration units i is minimum and exert oneself, P _{e1, max, i}be respectively maximum the gaining merit of cogeneration units i to exert oneself.

The unit ramping rate constraints of described step (3):

$\left\{\begin{array}{c}{P}_i^t-P_i^{t-1}\≤P_{\mathrm{up},i}\\ P_i^{t-1}-p_i^t\≤P_{\mathrm{down},i}\end{array}\right.---\left(7\right)$

P _{up, i}for cogeneration units i upwards ramping rate constraints, P _{down, i}for the downward ramping rate constraints of cogeneration units i.

The adiabatic compression air energy storage systems capacity-constrained of described step (3):

$\underset{t=1}{\overset{n}{\mathrm{\Σ}}}{p}_{e3}^t\≤S---\left(8\right)$

In formula, n≤T, S are energy storage rated capacity;

According to objective function and constraint conditio, solve any time adiabatic compression air energy storage systems and the optimum output power of cogeneration units.

Beneficial effect of the present invention:

1 compressed-air energy storage and cogeneration units combine, and the heat energy produced by pressurized air of compression storage of electrical energy injects heat supply pipeline, thus reduces the heating power of cogeneration units, are the more peak regulation space of wind-powered electricity generation online release.In like manner in peak of power consumption period, pressurized air is by turbine plant expansion power generation, and the heat energy that simultaneously stability cogeneration units is unnecessary is also converted into electric energy.Relative to the compressed-air energy-storage system of traditional single electric energy storage, compressed-air energy-storage system with cogeneration of heat and power coupled thermomechanics of the present invention self electric energy stored energy capacitance can provide space of surfing the Net for wind-powered electricity generation on the one hand, order is on the one hand by coupled thermomechanics auxiliary adjustment thermoelectricity unit heat outputting electricity ratio, thus cogeneration units can further for wind-powered electricity generation online provides peak regulation space.Therefore, under same peak regulation effect, the stored energy capacitance needed for system can be less than the scheme of independent power storage.

2 the present invention propose the cogeneration units of a kind of thermoelectricity unit and compressed-air energy storage composition, the thermal change of compressed-air energy storage and exoergic process is utilized while completing power storage release, assist the thermoelectricity export ratio regulating back pressure type unit, improve himself peak modulation capacity.Relative to the compressed-air energy-storage system of traditional single power storage pattern, under identical stored energy capacitance, the system that the present invention proposes can provide larger wind electricity digestion space.

The heat regulation cogeneration units that the method utilizes air compressing expansion absorption to discharge while adiabatic compression air energy storage systems carries out power storage exports hotspot stress, thus improves the wind-powered electricity generation online space of whole system.

The maximum innovative point of 3 the present invention is the improvement existing compressed-air energy-storage system, makes it can provide larger electrical network online space under same capacity:

3.1, for the compressed-air energy-storage system had at present, can produce heat in compression process, inflation process needs to absorb heat, and conventional processing method adopts hot water heat storage can to store, such as patent of invention 201210153370.X, causes needs additionally to increase heat-storing device like this.

3.2, the object of the invention is compressed-air energy storage and back pressure type cogeneration units to combine, carry out heat without the need to thermal accumulator to store, but when compressing, compression heat is directly supplied heat supply pipeline with the peak regulation space of releasing heat group of motors, absorb heat supply pipeline waste heat during expansion.Therefore for traditional compressed-air energy-storage system, the present invention is without the need to heat-stored device, and simultaneously under same capacity, owing to adopting combined heat and power scheduling, peak regulation space is larger.

3.3, the present invention adopts compressed air energy storage technology, it is a kind of two-way stored energy switch technology, namely electric energy can be converted to pressurized air energy, and can be converted to electric energy equally at peak of power consumption pressurized air, and the heat of prior art or cold accumulation of energy can not be converted to electric energy in scheduling process, particularly in peak of power consumption period, cold-storage and thermal storage cannot improve the generated energy of system, compressed-air energy storage then can provide electric energy by expansion power generation, and therefore the scheduling scope flexibility of heat storage and cold accumulation is more not enough than the present invention.

3.4, compared with cold-storage and thermal storage, dispatching method of the present invention is also different, and such as, in patent CN00134616, be with electricity rush hour at noon, thermal accumulator work energy storage, the present invention is then contrary, and in the low power consumption moment, compressed-air energy-storage system carries out energy storage.And in peak times of power consumption, compressed-air energy-storage system releases energy.

Current document and patent have had compressed-air energy storage application with wind-powered peak regulation, also have and peak regulation is carried out to wind-powered electricity generation dissolve by back pressure type unit cogeneration of heat and power scheduling, but utilize the heat of the emission and absorption in compressed-air energy storage process to be combined with cogeneration units, while energy storage, regulate thermoelectricity unit hotspot stress to improve co-generation system further by utilizing compressed energy-storage heat to dissolve wind-powered electricity generation ability, the present invention proposes first.

Accompanying drawing explanation

Fig. 1 is compressed-air energy-storage system of the present invention and back pressure type thermoelectricity unit coupling system structural drawing;

Fig. 2 is that cogeneration units is in compressed-air energy storage, wind-powered electricity generation combined dispatching principle;

1 is thermoelectricity unit boiler; 2 compressors; 3 generator motors; 4 first clutches; 5 turbine expansion equipment; 6 steam turbine; 7 thermoelectricity unit steam converter valves; 8 steam regulation valves; 9 first vapor-water heat exchangers; 10 high-pressure air throttle valve; 11 gas holder; 12 second vapor-water heat exchangers.

Embodiment

Below in conjunction with accompanying drawing and embodiment, the invention will be further described.

In the energy-storage system economic load dispatching containing wind-powered electricity generation, abandoning that air quantity is minimum, operating cost is minimum is common scheduling method, the present invention is minimum for objective function to meet under user's heat, electric demand condition overall coal consumption amount in system operation, dispatches energy-storage system and thermoelectricity unit.

A cogeneration type compressed-air energy-storage system for back pressure type thermoelectricity unit, comprising: cogeneration units and adiabatic compression air energy storage systems;

Described cogeneration units comprises thermoelectricity unit boiler 1, the output terminal of described thermoelectricity unit boiler is divided into two branch roads, wherein a branch road is connected with the input end of heat user by steam turbine 6, an other branch road is connected with the input end of heat user by thermoelectricity unit steam converter valve 7, and described steam turbine is connected with generator; The output terminal of described user is connected with the input end of thermoelectricity unit boiler by the second vapor-water heat exchanger 12;

Described adiabatic compression air energy storage systems comprises compressor 2, second vapor-water heat exchanger, gas holder 11, first vapor-water heat exchanger 9, turbine expansion equipment 5, first clutch 4, generator motor 3, the second clutch that connect successively, and described second clutch is connected with compressor;

Described heat user is in parallel with the first vapor-water heat exchanger, and the input pipeline of heat user and the first vapor-water heat exchanger is also provided with steam regulation valve 8;

Compressed-air energy-storage system and cogeneration units carry out the coupling of electric energy and heat energy: to cogeneration units heat supply, can absorb the heat energy of cogeneration units during the generating of release air during compressed-air energy-storage system compressed-air energy storage.

Described compressor exports high pressure-temperature air and carries out heat exchange by the backwater end of the second vapor-water heat exchanger and thermoelectricity unit boiler by the road, thus heats before entering thermoelectricity unit boiler heat supply backwater.

Described first vapor-water heat exchanger connects the steam output circuit of the high pressure airline before entering turbine expansion equipment and steam turbine, thus steam-turbine heat can be utilized to heat the gas before entering turbine expansion equipment.

The output pipe of described gas holder is provided with high-pressure air throttle valve 10.

A cogeneration type compressed-air energy-storage system regulating method for back pressure type thermoelectricity unit, comprises the steps:

Step (1): obtain wind-powered electricity generation prediction output power, thermal load demands prediction data and the electrical load requirement prediction data in next scheduling time section T;

Step (2): Offered target function:

For back pressure type cogeneration units, because its heating load is from the weak steam of discharging after steam turbine power generation, without the need to excessive fuel consumption, therefore its coal consumption amount of its heat supply Cc can be expressed as the quadratic form of generated output:

$C_1(i,t)=a_i{\left(P_{e1,i}^t\right)}^2+b_i{p}_{e1,i}^t+c_i$

In formula: wherein, a _i, b _i, c _ifor unit _icoal consumption coefficient; for unit i is at the generated output of t.

The wind power that system is dissolved is without the need to consume fuel, so its equivalent coal consumption amount C ₂(t)=0

Inevitably cause loss in compressed-air energy-storage system working procedure, if its energy storage efficiency is η, then energy-storage system equivalence power consumption can be expressed as:

$C_3\left(t\right)=(1-\mathrm{\η})C_{\mathrm{ave}}{p}_{e3}^t$

C in formula _avefor system unit power averaging energy consumption, for energy-storage system is at the generated output of t.

Comprehensively can set up system goal function is:

$C\left(t\right)=\underset{t=1}{\overset{T}{\mathrm{\Σ}}}\{\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{C}_1(i,t)p_{e1,i}^t+C_2\left(t\right)p_{e2}^t+C_3\left(t\right)p_{e3}^t\}$

Step (3): constraint conditio is set:

The constraint of electricity, thermal equilibrium

$\left\{\begin{array}{c}\underset{i\∈N}{\mathrm{\Σ}}{P}_{e1,i}^t+P_{e2}^t+P_{e3}^t=P_{\mathrm{De}}^t\\ P_{h,i}^t+c_v{p}_{e2}^t\≥P_{\mathrm{Dh}}^t\end{array}\right.$

In formula for t electricity, heat load power, c _vfor energy-storage system hotspot stress.

Thermoelectricity unit units limits:

$\left\{\begin{array}{c}{P}_{e1,i}^t=c_m{P}_{h,i}^t+K_i\\ P_{e1,\min ,i}\≤P_{e1,i}^t\≤P_{e1,\max ,i}\end{array}\right.$

C in formula _mrepresent the hotspot stress of thermoelectricity unit, K _ifor constant.P _{e1, min, i}, P _{e1, max, i}be respectively minimum, maximum the gaining merit of unit i to exert oneself.

Unit ramping rate constraints:

$\left\{\begin{array}{c}{P}_i^t-P_i^{t-1}\≤P_{\mathrm{up},i}\\ P_i^{t-1}-p_i^t\≤P_{\mathrm{down},i}\end{array}\right.$

P _{up, i}, P _{down, i}be respectively unit i upwards, downward ramping rate constraints

Capacity of energy storing device retrains:

$\underset{t=1}{\overset{n}{\mathrm{\Σ}}}{p}_{e3}^t\≤S$

In formula, n<=T, S are energy storage rated capacity.

According to objective function and constraint conditio, any time energy-storage system and the optimum output power of thermoelectricity unit can be solved.

Relative to simple non-thermal electromagnetic alliance compressed-air energy-storage system, under identical stored energy capacitance, the present invention can provide larger wind-powered electricity generation online space, below with the same gas storage volume compressed-air energy-storage system that is V from air pressure P ₁be compressed to P ₂process is example, the wind-powered electricity generation online space that the cogeneration compressed-air energy-storage system that contrast non-thermal electromagnetic alliance compressed-air energy-storage system and the present invention propose can provide.

For non-thermal electromagnetic alliance compressed-air energy-storage system, the wind-powered electricity generation that can provide online space is w _com

$w_{\mathrm{com}}=\frac{1}{\mathrm{\&eta;}}\frac{\mathrm{Vr}}{r-1}[p_0^{-k}\frac{1}{k+1}(p_2^{k+1}-p_1^{k+1})-(p_2-p_1)]$

In formula: γ is specific heat ratio, and η is compressed energy-storage system total efficiency, and V represents gas holder volume, p ₀for external pressure, T ₀for ambient temperature, c _pfor the specific heat at constant pressure of air, p ₁represent the pressure before reservoir pressure change in compression process, p ₂represent the pressure after reservoir pressure change in compression process.

Under similarity condition, the cogeneration of heat and power compressed energy-storage system that the present invention proposes is except providing w _comelectric energy online space outside, be supplied to the heat Q of heat supply pipeline in compression process through the second vapor-water heat exchanger 12 _c:

$Q_c={\mathrm{\&epsiv;p}}_{0}V\frac{\mathrm{\&gamma;}}{\mathrm{\&gamma;}-1}[\frac{1}{k+1}(p_2^{k+1}-p_1^{k+1})-(p_2-p_1)]$

In formula: ε is heat exchanger efficiency.

In compression process, by utilizing the heat supply of pressurized air heat energy, thermoelectricity unit can reduce Q _cheating load, therefore can be the online space w that wind-powered electricity generation provides extra _hP:

w _HP＝Q _c/c _m

In formula, c _mfor the back pressure hotspot stress of focus unit.Therefore the wind-powered electricity generation online space that the cogeneration compressed-air energy-storage system adding the present invention's proposition provides altogether is w _hP+ w _com, be greater than the w of non-thermal electromagnetic alliance compressed-air energy-storage system _com.

Fig. 2 is cogeneration units and the schematic diagram of compressed-air energy-storage system in conjunction with peak regulation process.In one day, heat load is substantially constant, and network load and wind-powered electricity generation have obvious peak valley to change in time.When night, network load is in the lowest point, and wind power output power is but in peak, and the electric heating of system reality is than the hotspot stress being significantly less than thermoelectricity unit self.Now compressor operating, consume unnecessary electric energy release heat simultaneously, reduce the heat that thermoelectricity unit needs to export, the electricity that thermoelectricity unit exports also can reduce simultaneously, for wind-powered electricity generation online provides space.Peak times of power consumption at noon, the electric energy that blower fan exports is in the lowest point, and the electric heating of system requirements is than the regulation range being greater than thermoelectricity unit self, and now pressurized gas are generated electricity by decompressor, the heat energy of simultaneously stability.

By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technological scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.

Claims (10)

1. a cogeneration type compressed-air energy-storage system for back pressure type thermoelectricity unit, is characterized in that, comprising: cogeneration units and adiabatic compression air energy storage systems;

Described cogeneration units comprises thermoelectricity unit boiler, the output terminal of described thermoelectricity unit boiler is divided into two branch roads, wherein a branch road is connected with the input end of heat user by steam turbine, an other branch road is connected with the input end of heat user by thermoelectricity unit steam converter valve, and described steam turbine is connected with generator; The output terminal of described user is connected with the input end of thermoelectricity unit boiler by the second vapor-water heat exchanger;

Described adiabatic compression air energy storage systems comprises the compressor, the second vapor-water heat exchanger, gas holder, the first vapor-water heat exchanger, turbine expansion equipment, first clutch, generator motor, the second clutch that connect successively, and described second clutch is connected with compressor; Described heat user is in parallel with the first vapor-water heat exchanger, and the input pipeline of heat user and the first vapor-water heat exchanger is also provided with steam regulation valve;

Compressed-air energy-storage system and cogeneration units carry out the coupling of electric energy and heat energy: to cogeneration units heat supply, can absorb the heat energy of cogeneration units during the generating of release air during compressed-air energy-storage system compressed-air energy storage.

2. the cogeneration type compressed-air energy-storage system of a kind of back pressure type thermoelectricity unit as claimed in claim 1, it is characterized in that, described compressor exports high pressure-temperature air and carries out heat exchange by the backwater end of the second vapor-water heat exchanger and thermoelectricity unit boiler by the road, thus heats before entering thermoelectricity unit boiler heat supply backwater.

3. the cogeneration type compressed-air energy-storage system of a kind of back pressure type thermoelectricity unit as claimed in claim 1, it is characterized in that, described first vapor-water heat exchanger connects the steam output circuit of the high pressure airline before entering turbine expansion equipment and steam turbine, thus steam-turbine heat can be utilized to heat the gas before entering turbine expansion equipment.

4. a cogeneration type compressed-air energy-storage system regulating method for back pressure type thermoelectricity unit, is characterized in that,

When network load is at a low ebb, wind-powered electricity generation generating is in rush hour, and compressed-air energy storage is in compressed energy-storage pattern, part wind-powered electricity generation can be converted to high-pressure air can store; The high pressure-temperature air simultaneously produced in compression process heats the backwater path of heat supply pipeline after the second vapor-water heat exchanger, reduce with this heat that hot online group of turbine end need to export, thus heat connection power generator turbine provides extra online space for wind-powered electricity generation;

When network load peak, wind power is at a low ebb, gas holder release high-pressure air expansion power generation, inflation process mesohigh gas absorbs the heat of thermoelectricity power generator turbine by the first vapor-water heat exchanger and is converted into electric energy simultaneously, thus cogeneration units exports electric energy for peak regulation.

5. a cogeneration type compressed-air energy-storage system regulating method for back pressure type thermoelectricity unit, is characterized in that, comprise the steps:

Step (1): obtain wind-powered electricity generation prediction output power, thermal load demands prediction data and the electrical load requirement prediction data in next scheduling time section T;

Step (2): the wind power equivalence coal consumption amount of dissolving according to the coal consumption amount of t back pressure type thermoelectricity unit, t and compressed-air energy-storage system t equivalence power consumption arrange system goal function;

Step (3): arrange constraint conditio, according to system goal function and the constraint conditio of step (2), solves any time adiabatic compression air energy storage systems and the optimum output power of cogeneration units; Described constraint conditio comprises electric load Constraints of Equilibrium, heat load balance constraint, cogeneration units process constraint, unit ramping rate constraints and adiabatic compression air energy storage systems capacity-constrained.

6. method as claimed in claim 5, it is characterized in that, the step of described step (2) is:

Heat supply coal consumption amount for back pressure type cogeneration units is expressed as the quadratic form of generated output:

$C_1(i,t)=a_i{\left(p_{e1,t}^t\right)}^2+b_i{p}_{e1,i}^t+c_i---\left(1\right);$

In formula: C ₁(i, t) represents the coal consumption amount of t back pressure type thermoelectricity unit, a _i, b _i, c _ifor the coal consumption coefficient of back pressure type thermoelectricity unit i; be the generated output of i-th back pressure type thermoelectricity unit in t;

The wind-powered electricity generation part of dissolving without the need to consume fuel, so t is dissolved wind-powered electricity generation consume equivalent coal consumption amount C ₂(t) be

C ₂(t)＝0 (2)；

Inevitably loss is caused in adiabatic compression air energy storage systems working procedure, if adiabatic compression air energy storage systems energy storage efficiency is η, then compressed-air energy-storage system t equivalence power consumption C ₃(t) be:

$C_3\left(t\right)=(1-\mathrm{\&eta;})C_{\mathrm{ave}}{p}_{e3}^t---\left(3\right);$

C in formula _avefor the average energy consumption of whole system specific power, for adiabatic compression air energy storage systems is at the generated output of t;

P _e1represent back pressure thermoelectricity unit generated output, p _e2represent the wind power of dissolving, p _e3represent compressed-air energy-storage system generated output;

To sum up, setting up system goal function is:

$C\left(t\right)=\underset{t=1}{\overset{T}{\mathrm{\&Sigma;}}}\{\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{C}_1(i,t)p_{e1,i}^t+C_2\left(t\right)p_{e2}^t+C_3\left(t\right)p_{e3}^t\}---\left(4\right)$

Wherein, the total consumption of coal amount that C (t) is whole system, C ₁(i, t) represents the coal consumption amount of t back pressure type thermoelectricity unit, C ₂t wind power equivalence coal consumption amount that () is dissolved for t, C ₃t () is compressed-air energy-storage system t equivalence power consumption, represent the electric power of i-th thermoelectricity unit in t, represent the wind-powered electricity generation electric power of dissolving in t, represent the electric power of compressed-air energy-storage system t.

7. method as claimed in claim 5, is characterized in that, the electric load Constraints of Equilibrium of described step (3) and heat load balance constraint:

$\left\{\begin{array}{c}\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{P}_{e1,i}^t+P_{e2}^t+P_{e3}^t=P_{\mathrm{De}}^t\\ P_{h1,i}^t+c_v{p}_{e3}^t\&GreaterEqual;P_{\mathrm{Dh}}^t\end{array}\right.---\left(5\right)$

In formula for t equivalent electric load power, for t heat load power, c _vfor adiabatic compression air energy storage systems hotspot stress.

8. method as claimed in claim 5, is characterized in that, the cogeneration units units limits of described step (3):

$\left\{\begin{array}{c}{P}_{e1,i}^t=c_m{P}_{h,i}^t+K_i\\ P_{e1,\min ,i}\&le;P_{e1,i}^t\&le;P_{e1,\max ,i}\end{array}\right.---\left(6\right)$

Wherein, c _mrepresent the hotspot stress of cogeneration units, K _ifor constant, P _{e1, min, i}gain merit for cogeneration units i is minimum and exert oneself, P _{e1, max, i}be respectively maximum the gaining merit of cogeneration units i to exert oneself.

9. method as claimed in claim 5, is characterized in that, the unit ramping rate constraints of described step (3):

$\left\{\begin{array}{c}{P}_i^t-P_i^{t-1}\&le;P_{\mathrm{up},i}\\ P_i^{t-1}-P_i^t\&le;P_{\mathrm{down},i}\end{array}---\left(7\right)\right.$

P _{up, i}for cogeneration units i upwards ramping rate constraints, P _{down, i}for the downward ramping rate constraints of cogeneration units i.

10. method as claimed in claim 5, is characterized in that, the adiabatic compression air energy storage systems capacity-constrained of described step (3):

$\underset{t=1}{\overset{n}{\mathrm{\&Sigma;}}}{p}_{e3}^t\&le;S---\left(8\right)$

In formula, n≤T, S are energy storage rated capacity;

According to objective function and constraint conditio, solve any time adiabatic compression air energy storage systems and the optimum output power of cogeneration units.