CN107749645B - A method of control high-voltage large-capacity thermal storage heating device - Google Patents

A method of control high-voltage large-capacity thermal storage heating device Download PDF

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CN107749645B
CN107749645B CN201710883734.2A CN201710883734A CN107749645B CN 107749645 B CN107749645 B CN 107749645B CN 201710883734 A CN201710883734 A CN 201710883734A CN 107749645 B CN107749645 B CN 107749645B
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power
thermal storage
heating device
storage heating
thermal
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CN201710883734.2A
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CN107749645A (en
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葛维春
黄大为
葛延峰
罗桓桓
苏安龙
高凯
王顺江
史松杰
蔡国伟
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国网辽宁省电力有限公司
国网辽宁省电力有限公司电力科学研究院
国家电网公司
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract

The invention discloses a kind of electric heating systems of device of thermal storage heating containing high-voltage large-capacity to participate in power grid ACE method for controlling curves.Thermal storage heating device, cogeneration units, conventional thermal power unit, wind-powered electricity generation control object model are established in the AGC model of main control region, consider the cost mathematical model under thermal storage heating device thermal inertia and heat dissipation model and different running method, realizes that thermal storage heating device, cogeneration units, conventional thermal power unit and wind-powered electricity generation participate in ACE adjusting jointly.The present invention carries out difference control to the electric heating system of the device of thermal storage heating containing high-voltage large-capacity by considering that control zone adjusts spare and ACE adjusting direction, the final integrated coordinated control for realizing high-voltage large-capacity thermal storage heating device, conventional power unit, cogeneration units and wind-powered electricity generation.

Description

A method of control high-voltage large-capacity thermal storage heating device

Technical field

The invention belongs to electric system active power dispatch fields, are related to a kind of side for controlling high-voltage large-capacity thermal storage heating device Method.

Background technique

The major area of China's Wind Power Development is that " three Norths " is regional (referring to northeast, North China, northwest), and power supply architecture is joined with thermoelectricity It produces based on unit, it is poor to participate in peak modulation capacity.Moreover, for hot season cogeneration of heat and power (combined heat and power, CHP) The operation of unit further reduced regulating power, so that abandonment problem is more prominent.It is to meet for hot season cogeneration units Thermal load demands use the operational mode of " electricity determining by heat ", and regulating power is very limited, and significantly increase peak-load regulating energy Hypodynamic contradiction generates a large amount of abandonments and rations the power supply.

To improve wind-powered electricity generation networking scale, heat-storage technology is to dissolve one of the effective measures of abandonment power, alleviates north of china in winter The problems such as operation of heating period wind-electricity integration is difficult, there is very wide application prospect.Therefore, in order to sufficiently realize wind power resources Just bigization utilizes, and should will introduce routine AGC control comprising the electric heating system of high-voltage large-capacity thermal storage heating device, realize heat accumulation Heating installation and electric heating system overall-in-one control schema.

The real power control technology accessed in electric system for the electric heating system of the device containing thermal storage heating has as follows at present Method:

The prior art one " energy storage technology is solving the problems, such as the application prospect analysis in large-scale wind power integration " (electric system Automation the 1st phase of volume 37 in 2013) it is concentrated in large-scale wind power in grid-connected electric system, wind-power electricity generation is different from conventional hair The static power producing characteristics and dynamic response characteristic of electricity are brought newly to the security and stability of the abundance of power system power supply and operation Significant challenge.Various energy storage devices are to improve conventional power generation static state due to having the time-shift ability to power and energy The effective means of power producing characteristics and wind-power electricity generation dynamic response characteristic.

The prior art one is concentrated grid-connected from the static treatment characteristic and dynamic response characteristic and large-scale wind power of wind-power electricity generation The influence generated to electric system is set out, and proposes the basic ideas that large-scale wind power integration is solved the problems, such as when energy storage technology, but simultaneously It is not directed to solve the problems, such as large-scale wind power integration concrete measure.

The prior art two " the electric-thermal association system comprising large capacity heat accumulation " (Proceedings of the CSEE 2014 the 34th Rolled up for the 29th phase), propose that electricity-heat integration system comprising large capacity heat accumulation can make full use of electric system and therrmodynamic system physics The advantage of characteristic jumps out conventional electric power system scope, the complementarity of electric system and therrmodynamic system is made full use of, when wider array of The ability of most optimum distribution of resources is improved in empty range.Cogeneration units have highly important meaning for solving energy crisis Justice.

The prior art two is to solve the problems, such as the consumption of renewable energy, proposes to introduce large capacity heat accumulation, realizes electricity, heat 2 The collaboration of energy system optimizes, and under electricity, heat integration energy resource system frame, raising energy resource system beats space-time unique and distributes energy rationally The problems such as power, the effectively consumption of solution renewable energy and peak regulation.But it is not directed to the electric-thermal association system comprising large capacity heat accumulation Modeling and consumption and Analysis of Peak Regulation Capability.

The prior art three " embodiment and effect analysis of heat accumulation promotion wind electricity digestion capability " (Proceedings of the CSEE The 17th phase of volume 35 in 2015), it is beaten according to the coupled relation of electric system and therrmodynamic system by the control to heat accumulation link The rigid coupled relation of electricity-heat of broken electricity determining by heat, improves system regulating power.And to produced by heat-storing device installation site difference Effect analyzed.Based on the real data of a province in China grade power grid, simulation analysis heat accumulation promotes wind electricity digestion capability Effect, compare difference of the different application position heat accumulation in operational mode.

The prior art three analyzes heat accumulation position, heat storage capacity, heat exchange power, the parameters such as cogeneration units hotspot stress to mentioning The influence of high wind electricity digestion effect, the implementation to promote wind electricity digestion using heat accumulation provide guidance.But it does not design containing heat accumulation The coordination control strategy and control method of cogeneration units and wind-powered electricity generation.

The prior art four " the electric system electric heating integrated dispatch model containing heat accumulation " (Electric Power Automation Equipment 2014 the 34th Rolled up for the 5th phase), on the basis of conventional model, increase system heat balance constraint, the coupled thermomechanics constraint of thermoelectricity unit, heat accumulation Device operation constraint etc., and simulated target is extended to power supply and heat supply total consumption of coal is minimum.By analyzing somewhere power grid, It is effective for demonstrating institute's climbing form type.

The prior art four establishes unit containing thermoelectricity, heat accumulation, wind-powered electricity generation according to the current electric system centralized dispatching system in China , the electric system electric heating integrated dispatch model of pure condensate formula unit.But not from real-time control and AGC angle analysis steam power plant Middle configuration heat accumulation mode dissolves the effect of coal saving of wind-powered electricity generation.

Summary of the invention

Goal in research of the invention is:

So that the electric heating system of the device of thermal storage heating containing high-voltage large-capacity is participated in AGC jointly, realizes high-voltage large-capacity heat accumulation Heating installation participates in ACE (district control deviation, Area Control Error) adjusting in real time.And then make high-voltage large-capacity heat accumulation Heating installation, cogeneration units, the cooperation of conventional thermal power unit and wind-powered electricity generation, optimize the mode of resource transfer, realize electricity The double goal that net safety and stability and wind power resources make full use of.

To achieve the goals above, the present invention takes following technical scheme to realize:

1) a main control region is established in interconnected network system, implements the general areas control of interconnected network, in master Control area is established using dominant eigenvalues control as the Controlling model of target.

2) the thermal storage heating device in the main control regional model in system with large capacity, cogeneration units, routine Fired power generating unit, wind-powered electricity generation pass through high-voltage large-capacity thermal storage heating device, the association of cogeneration units, conventional thermal power unit and wind-powered electricity generation Allotment is closed, and it is spare all to have certain up and down adjustment in load peak interval of time;

3) the cost mathematical model under thermal storage heating device thermal inertia and heat dissipation model and two kinds of methods of operation is established, Thermal storage heating device, cogeneration units, conventional thermal power unit, wind-powered electricity generation control object mould are established in the AGC model of main control region Type.

4) thermal storage heating device thermal inertia and heat dissipation model

Thermal storage heating device thermal inertia refers to the ability that thermal storage heating device keeps Current Temperatures.Specific heat capacity is bigger, keeps the temperature The better thermal storage heating device of performance, temperature do not allow malleable, that is to say, that thermal inertia is bigger.What heat dissipation was measured is heat accumulation The thermal insulation property of heating installation can generally describe this ability with thermal resistivity.Thermal resistivity is bigger, and thermal storage heating device is protected Warm nature can be better, and heat dissipation is smaller.

For general thermal store, because the temperature change of water depends on absorbing in thermal storage heating device without phase transition process Heat and dissipation heat.The concept of thermal resistivity be used to calculate heat loss, that is to say, that inside and outside heat dissipation and thermal store Temperature difference it is directly proportional, can be represented by the formula:

In formula: PlossFor the power of thermal storage heating device thermal loss in the unit time, TinIt is the heat preservation of thermal storage heating device Temperature in layer, ToutIt is the outer temperature of thermal storage heating device insulating layer, R1It is the thermal resistivity of thermal store.

The energy state of thermal storage heating device can be expressed from the next:

ΔEph=Phin-Phout-Ploss

In formula: Δ EphIt is thermal storage heating device energy variation, PhinIt is the heat that thermal storage heating device absorbs, PhoutIt is storage The heat of hot heating installation supply thermic load.

The heat that thermal storage heating device absorbs is provided by electrothermal resistance silk, it is assumed that electrotransformation is that the transformation efficiency of heat is ηet, Then

PhinetPein

In formula: PeinIt is the electrical power of thermal store.

Supply the heat P of thermic loadhoutIt can be calculated by following formula:

Phout=cWaterρWaterΔVWater(Twout-Twin)

In formula: cWaterIt is the specific heat capacity of water, ρWaterIt is the density of water, Δ VWaterIt is to be passed in and out in the unit time by thermal storage heating device Water flow volume at mouthful, TwoutIt is water inlet water temperature, TwinIt is water outlet water temperature.

The energy variation amount of thermal storage heating device can also be indicated with the variable quantity of its temperature (when sensible heat state):

In formula: CinIt is total specific heat capacity of thermal storage heating device.

Therefore the thermal inertia model of thermal storage heating device can be represented by the formula:

Above formula can be further converted to following formula:

In formula:For function X (t), changes over time and change.

The above-mentioned differential equation can carry out Laplace function, obtain transmission function:

The thermal inertia constant of thermal storage heating device is R1Cin, which represent the energy that thermal storage heating device keeps Current Temperatures Power.By thermal inertia constant it is also seen that heat storage units thermal resistivity is bigger (namely thermal insulation property is better), overall specific heat Rong Yue great, system keep the ability of same day temperature stronger.

It certainly, can be in the hope of the analytic solutions of its heat accumulation body temperature because thermal inertia model is linear first-order differential equation. It calculates thermal storage heating device in the Δ t time and passes through insulating layer dispersed heat:

For thermal storage heating device, the variation of temperature is not directly proportional to the heat of absorption.Phase-change material is in decalescence StageIts temperature remains unchanged, so the above-mentioned model needs for general thermal storage heating device are modified.Latent The hot heat accumulation stage,Therefore thermal storage heating device by insulating layer dispersed heat is within the Δ t time

In sensible heat heat absorption or heat release, the above-mentioned differential equationTemperature can change in insulating layer at this time, to micro- Point available room temperature of equation solution changes with time rule, such as following formula:

Foregoing discuss, under two kinds of heat accumulation modes of sensible heat and latent heat, the heat dissipation of thermal storage heating device be it is different, Its thermal losses can be described as

The temperature of thermal storage heating device, which changes with time, can be represented by the formula:

In formula: thermal inertia constant is R1Cin

5) thermal storage heating device operating cost mathematical model

Thermal storage heating device later period operating cost mainly includes operation and maintenance cost, the electricity charge of abandonment electricity and heating power shortage expenditure Service fee.When thermal storage heating device is run, system needs to safeguard, maintenance cost is generally available following formula expression:

C2=CnRm

In formula: RmIt is maintenance cost ratio, percentage sign indicates.

The operation of thermal storage heating device needs to consume abandonment electricity, grid electricity fee cost C3It can be represented by the formula:

In formula: pwIt is to abandon wind power price;It is consumption abandonment electrical power;Δ T is the unit time, generally hour.

If heating power shortage can be represented by the formula by normally netting electric supply, the extra charge of heating power shortage

In formula:It is that the net electricity charge are used,It is net electrical power.

If steam power plant is that the heat supply of thermal storage heating device carries out peak regulation service, thermal storage heating device needs to pay heat The heating power peak regulation expense of power plant is

In formula:It is the peak regulation service heating power unit price of thermal storage heating device payment,It is steam power plant's heating power.

Therefore, cost when thermal storage heating device is run mainly includes maintenance cost, grid electricity fee cost and existing heating power tune Peak cost.

6) the cost mathematics under completion control area model, heat accumulation thermal inertia and heat dissipation model and two kinds of methods of operation After model and thermal storage heating device, cogeneration units, conventional thermal power unit control object model, setting control area is totally controlled System strategy can be adjusted for real-time ACE.

7) when control area overall control strategy is real-time ACE, consider thermal storage heating device thermal inertia and heat dissipation model And the cost mathematical model under different running method, add and utilizes the heat stored in high-voltage large-capacity thermal storage heating device when power output Thermic load is supplied, increases the electric heating system electric power of the device of thermal storage heating containing high-voltage large-capacity when subtracting power output, realizes heat accumulation Heating installation, cogeneration units, conventional thermal power unit, cooperation between wind-powered electricity generation.

8) when the real-time ACE of interconnected network system is timing, i.e., when main control region sends power outside greater than planned value.If not examining Consider the controlling dead error of the variation of ACE caused by subsequent perturbations and AGC unit, all unit outputs are reduced in main control region.First Conventional thermal power unit power output is reduced, after conventional thermal power unit power output reaches and adjusts the upper limit, increases electricity using abandonment electricity and supplies Hot systems electric power is equivalent to and increases main control region power load.And the thermal energy that electric heating system generates supplies thermic load, To decouple " electricity determining by heat " constraint, thermoelectricity unit output is reduced, the waste heat that electric heating system generates is stored in heat accumulation confession Heater device.Control strategy is as shown in Figure 1.

9) when the real-time ACE of interconnected network system is negative, i.e., when main control region sends power outside less than planned value.If not examining Consider the controlling dead error of the variation of ACE caused by subsequent perturbations and AGC unit, preferentially utilizes high-voltage large-capacity heat accumulation in main control region The heat supply thermic load stored in heating installation.It is negative that heat is supplied using the heat stored in high-voltage large-capacity thermal storage heating device Lotus reduces thermoelectricity unit heat demand, breaks the rigid constraint of cogeneration units " electricity determining by heat " and has certain adjusting Flexibility, to enhance the regulating power of thermoelectricity unit.It is limited when cogeneration units reach adjusting, conventional thermal motor should be increased Group power output makes main control region send power outside and meets real-time ACE requirement.

Control strategy is as shown in the picture.

Beneficial effect

The beneficial effect that the present invention can generate includes:

It solves the problems, such as large-scale wind power integration concrete measure, while including that the electric-thermal association system of large capacity heat accumulation is built Mould and consumption and Analysis of Peak Regulation Capability, the coordination control strategy and control of the cogeneration units containing heat accumulation and wind-powered electricity generation in design Side configures the effect of coal saving that heat accumulation mode dissolves wind-powered electricity generation from real-time control and AGC angle analysis steam power plant.

Detailed description of the invention

Fig. 1 is system flow chart.

Fig. 2 interconnected electric power system figure.

According to interconnected network ACE change curve, high-voltage large-capacity thermal storage heating device, cogeneration units, routine are utilized The cooperation of fired power generating unit and wind-powered electricity generation realizes interconnected network ACE curve real-time control.

When the real-time ACE of interconnected network system is timing, i.e., main control region sends power outside greater than planned value.Pacified based on power grid The double goal that full stabilization and wind power resources make full use of, if not considering the variation of ACE caused by subsequent perturbations and the control of AGC unit Dead zone processed should reduce conventional thermal power unit power output first, judge whether meet in real time within conventional thermal power unit is adjusted and limited ACE requirement.When conventional thermal power unit, which reaches adjusting limitation, is unsatisfactory for real-time ACE requirement, abandonment electricity is utilized to increase electric heat supply System electric power is equivalent to and increases main control region power load.And the thermal energy that electric heating system generates supplies thermic load, it is more Remaining heat is stored in high-voltage large-capacity thermal storage heating device.The thermal energy that electric heating system generates supplies thermic load, to decouple Cogeneration units " electricity determining by heat " constraint can reduce cogeneration units power output, so that main control region is sent power outside and meet in fact When ACE requirement.

When the real-time ACE of interconnected network system is negative, i.e., main control region sends power outside less than planned value.If after not considering ACE caused by continuous disturbance changes and the controlling dead error of AGC unit, the heat stored in Ying Liyong high-voltage large-capacity thermal storage heating device Amount supply thermic load, reduces thermoelectricity unit heat demand, breaks the rigid constraint of cogeneration units " electricity determining by heat " and have Certain flexible adjustment, to enhance the regulating power of thermoelectricity unit, judging to adjust within limitation in cogeneration units is It is no to meet real-time ACE requirement.It is unsatisfactory for real-time ACE requirement when cogeneration units reach adjusting limitation, conventional thermoelectricity should be increased Unit output makes main control region send power outside and meets real-time ACE requirement.

Specific embodiment

In the present invention, the electric heating system for disclosing a kind of device of thermal storage heating containing high-voltage large-capacity participates in power grid ACE Method for controlling curves.When establishing control area AGC model, initially set up thermal storage heating device thermal inertia and heat dissipation model and Cost mathematical model under different running method establishes thermal storage heating device, cogeneration units, conventional thermoelectricity on this basis Unit, wind-powered electricity generation control object model.Complete control area model, heat accumulation thermal inertia and heat dissipation model and different running method Under cost mathematical model and thermal storage heating device, cogeneration units, conventional thermal power unit control object model after, setting control Region overall control strategy processed is real-time ACE adjusting, passes through thermal storage heating device, cogeneration units, conventional thermal power unit, wind Cooperation between electricity adds and the heat stored in high-voltage large-capacity thermal storage heating device is preferentially utilized to supply thermic load when power output, All unit outputs in main control region are reduced when subtracting power output.

In the present invention, it discloses a kind of high-voltage large-capacity thermal storage heating device and is related to maximally utilizing for wind power resources Conventional power unit, cogeneration units, electric heating system control method for coordinating.It is when the real-time ACE of interconnected network system is timing, i.e., main Power is sent outside greater than planned value in control area.If not considering the controlling dead error of the variation of ACE caused by subsequent perturbations and AGC unit, All unit outputs are reduced in main control region.Conventional thermal power unit power output is reduced first, is reached in conventional thermal power unit power output To after adjusting the upper limit, increases electric heating system electric power using abandonment electricity, be equivalent to and increase main control region power load. And the thermal energy that electric heating system generates supplies thermic load, to decouple " electricity determining by heat " constraint, reduces thermoelectricity unit output, electricity supplies The waste heat that hot systems generate is stored in thermal storage heating device.When the real-time ACE of interconnected network system is negative, i.e. main control region When sending power outside less than planned value.If not considering the controlling dead error of the variation of ACE caused by subsequent perturbations and AGC unit, main control The heat supply thermic load stored in high-voltage large-capacity thermal storage heating device is preferentially utilized in region.Utilize high-voltage large-capacity heat accumulation The heat supply thermic load stored in heating installation, reduces thermoelectricity unit heat demand, it is " fixed with heat to break cogeneration units Electricity " rigid constraint and have certain flexible adjustment, to enhance the regulating power of thermoelectricity unit.Work as cogeneration units Reach adjusting limitation, Ying Zengjia conventional thermal power unit power output makes main control region send power outside and meets real-time ACE requirement.Pass through Consider that control zone adjusts the spare adjusting direction with ACE and distinguishes to the electric heating system of the device of thermal storage heating containing high-voltage large-capacity Control is coordinated in control, the final integration for realizing high-voltage large-capacity thermal storage heating device, conventional power unit, cogeneration units and wind-powered electricity generation System.

The present invention is illustrated according to the preferred embodiment, it should be understood that but above-described embodiment does not limit in any form The present invention, all technical solutions obtained in the form of equivalent substitutions or equivalent transformations, all falls within protection scope of the present invention

Specific example:

Under the premise of guaranteeing heating quality and meeting load and operation constraint, conventional power unit, thermoelectric perpetual motion machine are reasonably distributed The power output of group and wind power plant, with the minimum target of total consumption of coal amount F in main control region, the interconnected network scheduling model objective function Are as follows:

MinF=F1+F2+F3

In formula, F1For conventional thermal power unit coal consumption amount in main control area;F2For thermoelectricity unit coal consumption in main control area Amount;F3For wind-powered electricity generation abandonment penalty term in main control area.

F1Expression formula are as follows:

F1=ai+biPi+ciPi 2

In formula, ai、bi、ciFor the consumption characterisitic parameter of conventional thermal power unit i;PiFor conventional thermal power unit power output.

F2Expression formula are as follows:

F2=c0+c1Pe+c2Q+c3Pe 2+c4PeQ+c5Q2

In formula, c0、c1、c2、c3、c4、c5For cogeneration units consumption characterisitic parameter;PeFor the power generation of cogeneration units Power;Q is heating load size.

F3Expression formula are as follows:

F3=γ (Pwf-Pw)

In formula, γ is penalty factor;PwfFor the wind-powered electricity generation prediction power of wind power plant;PwFor the wind-powered electricity generation unscheduled power of wind power plant.

Constraint condition:

(1) power-balance constraint of system

Pi+Pe+Pw=Ps

In formula, PsPlan to send power outside to region B for main control area A.

(2) conventional thermal power unit constrains

Pimin≤Pi≤Pimax

In formula: PiminFor the minimum load of unit i;PimaxFor the maximum output of unit i.

(3) thermoelectricity unit power constraint

Pemin≤Pe≤Pemax

In formula: PeminThe minimum electricity power output for being thermoelectricity unit under certain thermic load power;PemaxIt is thermoelectricity unit one Maximum electricity power output under fixed thermic load power.

(4) wind power constrains

Wind-powered electricity generation plan power output is not more than wind-powered electricity generation prediction power, inequality constraints are as follows:

0≤Pw≤Pwf

Scene 1: include 1 200MW conventional thermal power unit, 1 300MW thermoelectricity connection in certain interconnected network main control region A Produce unit, 1 field of wind-force, local thermic load 287.8MW.Region B load 300MW, main control region A send power outside to region B 350MW。

For 300MW cogeneration units, under the thermic load power of 287.8MW, by 300MW cogeneration units electricity It is 210MW that thermal characteristics, which can obtain its minimum electricity power output, and maximum electricity power output is 256.9MW.200MW conventional thermal power unit minimum load is 50MW, maximum output 200MW.Field of wind-force maximum wind prediction power is 50MW.

Conventional thermal power unit, cogeneration of heat and power machine are obtained by solving to interconnected network scheduling model according to given data The power output plan of group, wind power plant is respectively 90MW, 210MW, 50MW.Real-time ACE=350MW-300MW=50MW > 0.To meet Real-time ACE requirement, therefore unit output should lower 50MW in the A of main control region.And cogeneration units due to its Electrothermal Properties its Electricity power output has been minimum value, therefore fired power generating unit power output should lower 40MW, and wind-powered electricity generation plan power output should lower 10MW.Therefore it can generate The abandonment electricity of 10MW.

Scene 2: include 1 200MW conventional thermal power unit, 1 300MW thermoelectricity connection in certain interconnected network main control region A Produce unit, 1 field of wind-force, the electric heating system of 1 set of device of thermal storage heating containing high-voltage large-capacity.Local thermic load 287.8MW.Area Domain B load 300MW, main control region A send power 350MW outside to region B.

The difference of scene 2 and scene 1 is in the A of main control region that model includes high-voltage large-capacity thermal storage heating device Electric heating system can use the abandonment electricity generated in scene 1, converts thermal energy for abandonment electricity and supplies local thermic load use Family reduces the heat demand of cogeneration units, enhances the regulating power of cogeneration units, reaches wind power resources and maximizes benefit Purpose.

Scene 3: include 1 200MW conventional thermal power unit, 1 300MW thermoelectricity connection in certain interconnected network main control region A Produce unit, 1 field of wind-force, the electric heating system of 1 set of device of thermal storage heating containing high-voltage large-capacity.Local thermic load 287.8MW.Area Domain B load 500MW, main control region A send power 350MW outside to region B.

The difference of scene 3 and scene 1 is that region B load becomes 500MW, real-time ACE=350MW-500MW=-150MW <0.To meet real-time ACE requirement, therefore unit output should raise 150MW in the A of main control region.Cogeneration units are due to its electricity Thermal characteristics can not adjust its electricity power output, and wind power plant plan power output is equal to wind-powered electricity generation prediction power, and conventional thermal power unit is gone out due to it The power upper limit is 200MW, can only increase power output 110MW.Therefore it is unable to satisfy real-time ACE requirement.

Scene 4: include 1 200MW conventional thermal power unit, 1 300MW thermoelectricity connection in certain interconnected network main control region A Produce unit, 1 field of wind-force, the electric heating system of 1 set of device of thermal storage heating containing high-voltage large-capacity.Local thermic load 287.8MW.Area Domain B load 500MW, main control region A send power 350MW outside to region B.

The difference of scene 4 and scene 3 is in the A of main control region that model includes high-voltage large-capacity thermal storage heating device Electric heating system can use the heat supply thermic load of the storage in thermal storage heating device, reduce the confession of cogeneration units Heat demand breaks the rigid constraint of cogeneration units " electricity determining by heat " and has certain flexible adjustment, increases 40MW and goes out Power, to meet real-time ACE requirement.

Claims (9)

1. high-voltage large-capacity thermal storage heating device participates in power grid ACE method for controlling curves, characterized in that it comprises the following steps:
(1) a main control region is established in interconnected network system;
(2) the thermal storage heating device in the main control regional model in system with large capacity, cogeneration units, conventional thermoelectricity Unit, wind-powered electricity generation are matched by the coordination of high-voltage large-capacity thermal storage heating device, cogeneration units, conventional thermal power unit and wind-powered electricity generation It closes, it is spare all to have certain up and down adjustment in load peak interval of time;
(3) the cost mathematical model under thermal storage heating device thermal inertia and heat dissipation model and two kinds of methods of operation is established;
(4) the cost mathematical model under completion main control regional model, thermal inertia and heat dissipation model and two kinds of methods of operation After thermal storage heating device, cogeneration units, conventional thermal power unit control object model, overall control plan in control area is set Slightly real-time ACE is adjusted;
(5) when control area overall control strategy is real-time ACE, consider thermal storage heating device thermal inertia and heat dissipation model and not With the cost mathematical model under the method for operation, the electric heating system that the device of thermal storage heating containing high-voltage large-capacity is reduced when adding power output is used Electrical power increases the electric heating system electric power of the device of thermal storage heating containing high-voltage large-capacity, realizes thermal storage heating when subtracting power output Device, cogeneration units, conventional thermal power unit, cooperation between wind-powered electricity generation.
2. high-voltage large-capacity thermal storage heating device according to claim 1 participates in power grid ACE method for controlling curves, feature It is: in the step (1), implements the general areas control of interconnected network, establish in main control region with dominant eigenvalues Control is the Controlling model of target.
3. high-voltage large-capacity thermal storage heating device according to claim 1 participates in power grid ACE method for controlling curves, feature It is: in the step (3), establishes thermal storage heating device, cogeneration units, routine in the AGC model of main control region Fired power generating unit, wind-powered electricity generation control object model.
4. high-voltage large-capacity thermal storage heating device according to claim 1 participates in power grid ACE method for controlling curves, feature It is: in the step (3), thermal storage heating device operating cost mathematical model:
Thermal storage heating device later period operating cost mainly includes the clothes of operation and maintenance cost, the electricity charge of abandonment electricity and heating power shortage expenditure Business expense;When thermal storage heating device is run, system needs to safeguard, maintenance cost is indicated with following formula:
C2=CnRm
In formula: RmIt is maintenance cost ratio, percentage sign indicates;
The operation of thermal storage heating device needs to consume abandonment electricity, grid electricity fee cost C3It is indicated with following formula:
In formula: pwIt is to abandon wind power price;It is consumption abandonment electrical power;Δ T is the unit time, is hour;
If heating power shortage is indicated by normally netting electric supply, the extra charge of heating power shortage with following formula
In formula:It is that the net electricity charge are used,It is net electrical power;
If steam power plant is that the heat supply of thermal storage heating device carries out peak regulation service, thermal storage heating device needs to pay steam power plant Heating power peak regulation expense be
In formula:It is the peak regulation service heating power unit price of thermal storage heating device payment,It is steam power plant's heating power;
Therefore, cost when thermal storage heating device is run mainly include maintenance cost, grid electricity fee cost and existing heating power peak regulation at This.
5. high-voltage large-capacity thermal storage heating device according to claim 1 participates in power grid ACE method for controlling curves, feature Be: in the step (5), when the real-time ACE of interconnected network system is timing, i.e., main control region sends power outside greater than plan When value;If not considering the controlling dead error of the variation of ACE caused by subsequent perturbations and AGC unit, all units go out in main control region Power is reduced.
6. high-voltage large-capacity thermal storage heating device according to claim 1 participates in power grid ACE method for controlling curves, feature Be: in the step (5), when the real-time ACE of interconnected network system is negative, i.e., main control region sends power outside less than plan When value;If not considering the controlling dead error of the variation of ACE caused by subsequent perturbations and AGC unit, main control preferentially increases wind in region Electricity power output.
7. high-voltage large-capacity thermal storage heating device according to claim 1 participates in power grid ACE method for controlling curves, feature It is: in the step (5), considers the cost mathematical modulo under thermal storage heating device thermal inertia and model and different running method In the case where type, thermal storage heating device, cogeneration units, conventional thermal power unit, cooperation between wind-powered electricity generation are realized.
8. high-voltage large-capacity thermal storage heating device according to claim 1 participates in power grid ACE method for controlling curves, feature It is, first reduction conventional thermal power unit power output, after conventional thermal power unit power output reaches and adjusts the upper limit, utilizes abandonment electricity Increase electric heating system electric power, dissolves more abandonment electricity to reduce wind power output, the heat that electric heating system generates Thermic load can be supplied, to decouple " electricity determining by heat " constraint, reduces thermoelectricity unit output, the waste heat that electric heating system generates It is stored in thermal storage heating device.
9. high-voltage large-capacity thermal storage heating device according to claim 5 participates in power grid ACE method for controlling curves, feature It is, supplies thermic load using the heat stored in high-voltage large-capacity thermal storage heating device, reduce thermoelectricity unit heat demand, beat It breaks the rigid constraint of cogeneration units " electricity determining by heat " and there is certain flexible adjustment, to enhance the tune of thermoelectricity unit Energy saving power.
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