CN110266026A - A kind of energy storage constant volume method of power plant's energy storage auxiliary frequency modulation - Google Patents
A kind of energy storage constant volume method of power plant's energy storage auxiliary frequency modulation Download PDFInfo
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- CN110266026A CN110266026A CN201910560881.5A CN201910560881A CN110266026A CN 110266026 A CN110266026 A CN 110266026A CN 201910560881 A CN201910560881 A CN 201910560881A CN 110266026 A CN110266026 A CN 110266026A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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- Y—GENERAL 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
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Abstract
The invention discloses a kind of energy storage constant volume methods of power plant's energy storage auxiliary frequency modulation, comprising: obtains electric power factory equipment supplemental characteristic and the existing actual operating data of equipment；According to electric power factory equipment supplemental characteristic and Design cooling load, calculates high factory and become the design surplus capacity value accessed for energy storage；According to electric power factory equipment supplemental characteristic and actual motion peak load, calculates high factory and become the actual motion surplus capacity value accessed for energy storage；Simulation calculation economic optimum stored energy capacitance value is carried out according to actual operating data；It determines the standard of energy-storage system constant volume, and surplus capacity value will be designed and actual motion surplus capacity value is assigned to the intermediate variable value of standard respectively；The size between economic optimum stored energy capacitance value and intermediate variable value is judged respectively, to determine the preliminary type selecting capability value of energy storage, and is carried out electrical security and is checked to determine the final type selecting capability value of energy storage；The present invention relatively selects suitable energy storage power according to unit performance difference between each power plant, realizes energy storage maximization of economic benefit.
Description
Technical field
The present invention relates to energy storage constant volume technical field more particularly to a kind of energy storage constant volume sides of power plant's energy storage auxiliary frequency modulation
Method.
Background technique
In Operation of Electric Systems, is solved in regional power grid, the active imbalance of randomness is asked the short time (second or minute grade)
The control of topic, i.e. mains frequency and dominant eigenvalues is mainly realized by Automatic Generation Control (AGC).It proposes variable frequency power source performance
The high requirements such as regulations speed is fast, degree of regulation is high, power regulation direction frequent transitions are gone out.Power grid AGC frequency modulation function is main
It is provided by the normal power supplies including water power, Gas Generator Set and fired power generating unit.Since these power-supply systems all have response
Inertia, non-renewable energy, which is converted into electric energy, will undergo a series of complex process.Especially the AGC frequency modulation performance of fired power generating unit and electricity
Net expectation is compared, and there are also larger gap, shows as adjusting the statuses such as delay, deviation (hyperharmonic less stress).For energy-storage system,
In rated operating range, the output of specified power, synthesis response can be completed in 1 second, with 99% or more precision
Ability is particularly suitable for the power conversion demand in AGC frequency modulated time scale.It is shown according to research report: on average, energy storage
The frequency modulation effect of system is 1.4 times of Hydropower Unit, is 2.3 times of natural gas unit, is 20 times of coal unit or more.Energy storage
The characteristics of auxiliary frequency modulation principle is quick using battery energy storage system, accurate response, auxiliary power generation unit carries out under AGC mode
Load adjustment, and then the regulation performance of generating set is improved, while disturbance is not brought to unit itself adjusting.Therefore, configuration electricity
Energy-storage system auxiliary AGC joint frequency modulation in pond is the inexorable trend of all generating sets.Power Plant Side energy-storage system access way, it is former
It must cannot then influence unit and power grid operates normally, station-service ancillary equipment normal operation cannot be influenced, station service cannot be influenced
Switch flexibility.The access scheme that power plant increases energy-storage system at present mostly uses greatly plug-in station service bus access scheme, that is, stores up
Energy frequency modulation device is connected to the station-service active section of Power Plant using power cable, accesses Station Service Electrical-Energy system.
Energy storage system capacity common configuration method in the joint frequency modulation project of energy storage at present is mainly based upon power grid frequency modulation spy
Property.Because 80% frequency modulation instruction is 3% or so of unit full capacity, therefore 3% unit capacity is chosen as energy storage power, guarantee
Energy-storage system is able to respond 80% or so power grid AGC instruction.
Therefore, domestic energy storage auxiliary frequency modulation project is all based on coal unit at present；For 300,000 or more coal unit,
Station service power consumption rate is generally in 3%-6% or so, therefore using 3% unit capacity as energy storage power, it is only necessary to high factory's varying capacity is calculated,
When guaranteeing energy-storage system charging, high factory becomes non-overloading；In energy storage system discharges, energy storage electric discharge is complete by station-service electric load
Consumption is not in that active power send supreme factory to become high-pressure side phenomenon.For Combined cycle gas-steam turbine power plant, due to station-service
Electric rate is lower, generally below 2%.If restrictive condition when using station service power consumption rate as energy storage power selection, guarantees that energy storage is put
Not occurring active power when electric send supreme factory to become high-pressure side, then energy storage power is smaller, to the improvement result of unit frequency modulation performance
It is limited.Under the support that high factory becomes the technology of falling power transmission, active power is allowed to send supreme factory change high-pressure side, for coal-burning power plant with
Combined cycle gas-steam turbine power plant, energy-storage system power can choose bigger, improvement work of the energy-storage system to unit frequency modulation performance
With can it is more excellent, but at present there has been no correlation based on the technology energy storage auxiliary frequency modulation energy storage constant volume method, guarantee power plant and
While electric power netting safe running, economy is more excellent；And 3% unit capacity is selected as energy storage power, for the power plant of same capacity
For, the energy storage power of selection is identical, does not account for the differentiation of unit performance between each power plant, leads to energy storage economic benefit
Maximization cannot be reached.
Summary of the invention
The present invention provides a kind of energy storage constant volume methods of power plant's energy storage auxiliary frequency modulation, are held by calculating economic optimum energy storage
Magnitude and intermediate variable value is determined according to the standard of energy-storage system constant volume, determination obtains the preliminary type selecting capability value of energy storage, and carries out
Electrical security is checked to determine the final type selecting capability value of energy storage, is solved and is not accounted for machine between each power plant in the prior art
The technical issues of organizing the differentiation of performance and identical energy storage power selected to the power plant of same capacity, thus according between each power plant
The difference of unit performance correspondingly selects suitable energy storage power, and then realizes the maximization of energy storage economic benefit.
In order to solve the above-mentioned technical problem, the embodiment of the invention provides a kind of energy storage constant volumes of power plant's energy storage auxiliary frequency modulation
Method, comprising:
Obtain electric power factory equipment supplemental characteristic and the existing actual operating data of equipment；
According to the electric power factory equipment supplemental characteristic and Design cooling load, calculates high factory and become the design affluence appearance accessed for energy storage
Magnitude；
According to the electric power factory equipment supplemental characteristic and actual motion peak load, calculates high factory and become the reality accessed for energy storage
Border runs surplus capacity value；
Simulation calculation economic optimum stored energy capacitance value is carried out according to the actual operating data；
Determine the standard of energy-storage system constant volume, and by the design surplus capacity value and the actual motion surplus capacity value
It is assigned to the intermediate variable value of the standard respectively；
The size between the economic optimum stored energy capacitance value and the intermediate variable value is judged respectively, at the beginning of determining energy storage
Type selecting capability value is walked, and carries out electrical security and checks to determine the final type selecting capability value of energy storage.
Preferably, the electric power factory equipment supplemental characteristic includes: main transformer and the specified appearance of HV Auxiliary Transformer
Magnitude, high-pressure side load current value, low-pressure side load current value, wiring group, impedance value, voltage change ratio value and station service electrical system
The rated short circuit drop-out current value of equipment；The actual operating data includes: acceptance of the bid history data, HV Auxiliary Transformer
Actual motion maximum/minimum current value and unit participate in maximum output when frequency modulation.
It is preferably, described that simulation calculation economic optimum stored energy capacitance value is carried out according to the actual operating data,
Include:
According to acceptance of the bid history data, the detailed rules and regulations regulation based on the frequency modulation ancillary service of project location domain, simulation calculation
Determine the existing unit model of power plant；
On the basis of the power plant existing unit model, the AGC tune of prediction joint frequency modulation after energy-storage system model is added
Performance indicator is saved, and according to the corresponding Economic and Efficiency Analysis of stored energy capacitance, determines the optimal stored energy capacitance of benefit.
Preferably, the standard of the determining energy-storage system constant volume, and by the design surplus capacity value and described
Actual motion surplus capacity value is assigned to the intermediate variable value of the standard respectively, comprising:
When to meet actual motion requirement as target, using high factory become actual motion the case where as electrical security check
Standard；And the actual motion surplus capacity value is assigned to intermediate variable value；
When to meet theoretical design requirements as target, the mark that calculated load is checked as electrical security is become using high factory
It is quasi-；And the design surplus capacity value is assigned to intermediate variable value.
Preferably, described to be judged between the economic optimum stored energy capacitance value and the intermediate variable value respectively
Size to determine the preliminary type selecting capability value of energy storage, and carries out electrical security and checks to determine the final type selecting capability value of energy storage, packet
It includes:
When the economic optimum stored energy capacitance value is not less than the intermediate variable value, the preliminary type selecting capability value of energy storage is determined
For the intermediate variable value, and carries out electrical security and check to determine the final type selecting capability value of energy storage；
When the economic optimum stored energy capacitance value is less than the intermediate variable value, determine that the preliminary type selecting capability value of energy storage is
The economic optimum stored energy capacitance value, and carry out electrical security and check to determine the final type selecting capability value of energy storage.
Preferably, described when the economic optimum stored energy capacitance value is not less than the intermediate variable value, it determines
The preliminary type selecting capability value of energy storage is the intermediate variable value, and carries out electrical security and check to determine the final type selecting capacity of energy storage
Value, comprising:
When electrical security check passes through, determine that the final type selecting capability value of energy storage is that the preliminary type selecting of the energy storage is held
Magnitude；
When the electrical security check obstructed out-of-date, preset step-length value, and to the preliminary type selecting capability value of the energy storage according to
It is secondary to gradually reduce the step value, electrical security check is successively carried out, is passed through until checking, then the final type selecting capability value of energy storage
To reduce the preliminary type selecting capability value of energy storage after one or many step values.
Preferably, described when the economic optimum stored energy capacitance value is less than the intermediate variable value, determine storage
It can type selecting capability value be tentatively the economic optimum stored energy capacitance value, and carry out electrical security and check to determine that energy storage is finally selected
Type capability value, comprising:
When electrical security check passes through, determine that the final type selecting capability value of energy storage is that the preliminary type selecting of the energy storage is held
Magnitude；
When the electrical security check obstructed out-of-date, preset step-length value, and to the preliminary type selecting capability value of the energy storage according to
It is secondary to gradually reduce the step value, electrical security check is successively carried out, is passed through until checking, then the final type selecting capability value of energy storage
To reduce the preliminary type selecting capability value of energy storage after one or many step values.
Preferably, the progress electrical security check, comprising:
According to the preliminary type selecting capacity of the energy storage, the high factory after calculating access energy-storage system becomes design peak load rate, if
The high factory becomes design peak load rate≤100%, then checks and pass through, otherwise check and do not pass through；
Based on unit HV Auxiliary Transformer actual motion maximum current value, according to the preliminary type selecting capacity of the energy storage, core
High factory after calculating access energy-storage system becomes actual motion peak load rate, if high factory's change actual motion peak load rate≤
100%, then it checks and passes through, otherwise check and do not pass through；
Based on unit HV Auxiliary Transformer actual motion minimum current value, according to the preliminary type selecting capacity of the energy storage, core
High factory after calculating access energy-storage system becomes the peak load rate for the when of falling power transmission, if the high factory becomes the peak load rate for the when of falling power transmission
≤ 100%, then it checks and passes through, otherwise check and do not pass through；
Based on unit HV Auxiliary Transformer actual motion minimum current value, according to the preliminary type selecting capacity of the energy storage, core
Main transformer peak load rate after calculating access energy-storage system is checked logical if main transformer peak load rate≤100%
It crosses, otherwise checks and do not pass through；
According to the preliminary type selecting capacity of the energy storage, the maximum possible short circuit current through excessively high factory's low pressure side bus is calculated
Value, compared with the rated short circuit drop-out current value of station service electrical system equipment, if the maximum possible short-circuit current value is less than described
Rated short circuit drop-out current value is then checked and is passed through, otherwise checks and do not pass through.
Compared with the prior art, the embodiment of the present invention has the following beneficial effects:
The present invention is by calculating economic optimum stored energy capacitance value and determining intermediate variable according to the standard of energy-storage system constant volume
Value, determination obtain the preliminary type selecting capability value of energy storage, and carry out electrical security and check to determine the final type selecting capability value of energy storage, solution
It has determined and has not accounted for the differentiation of unit performance between each power plant in the prior art and the power plant of same capacity is selected identical
The technical issues of energy storage power, to correspondingly select suitable energy storage function according to the difference of unit performance between each power plant
Rate, and then realize the maximization of energy storage economic benefit.
Detailed description of the invention
Fig. 1: the energy storage constant volume method and step flow chart of frequency modulation is assisted for power plant's energy storage in the embodiment of the present invention；
Fig. 2: for the method flow schematic diagram of the final type selecting capability value of determination energy storage in the embodiment of the present invention；
Fig. 3: for the method flow schematic diagram of the progress electrical security check in the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1 is please referred to, the preferred embodiment of the present invention provides a kind of energy storage constant volume method of power plant's energy storage auxiliary frequency modulation, packet
It includes:
S1 obtains electric power factory equipment supplemental characteristic and the existing actual operating data of equipment；In the present embodiment, the power plant
Device parameter data include: main transformer and HV Auxiliary Transformer rated capacity value, high-pressure side load current value, low-pressure side volume
Constant current value, wiring group, impedance value, voltage change ratio value and station service electrical system equipment rated short circuit drop-out current value；It is described
Actual operating data includes: acceptance of the bid history data, HV Auxiliary Transformer actual motion maximum/minimum current value and unit
Participate in maximum output when frequency modulation.
S2 calculates high factory and becomes the design richness accessed for energy storage according to the electric power factory equipment supplemental characteristic and Design cooling load
Abundant capability value；
S3 calculates high factory and becomes for energy storage access according to the electric power factory equipment supplemental characteristic and actual motion peak load
Actual motion surplus capacity value；
S4 carries out simulation calculation economic optimum stored energy capacitance value according to the actual operating data；In the present embodiment, it wraps
Include: according to acceptance of the bid history data, the detailed rules and regulations regulation based on the frequency modulation ancillary service of project location domain, simulation calculation determines electricity
The existing unit model of factory；On the basis of the power plant existing unit model, joint frequency modulation is predicted after energy-storage system model is added
AGC regulation performance index determine the optimal stored energy capacitance of benefit and according to the corresponding Economic and Efficiency Analysis of stored energy capacitance.
S5 determines the standard of energy-storage system constant volume, and the design surplus capacity value and the actual motion affluence is held
Magnitude is assigned to the intermediate variable value of the standard respectively；In the present embodiment, the standard of the determining energy-storage system constant volume, and
The design surplus capacity value and the actual motion surplus capacity value are assigned to the intermediate variable value of the standard, packet respectively
Include: when to meet actual motion requirement as target, using high factory become actual motion the case where as electrical security check mark
It is quasi-；And the actual motion surplus capacity value is assigned to intermediate variable value；When to meet theoretical design requirements as target, with
High factory becomes the standard that calculated load is checked as electrical security；And the design surplus capacity value is assigned to intermediate variable
Value.
S6 judges big between the economic optimum stored energy capacitance value and the intermediate variable value respectively referring to figure 2.
It is small, to determine the preliminary type selecting capability value of energy storage, and carries out electrical security and check to determine the final type selecting capability value of energy storage.At this
In embodiment, comprising:
When the economic optimum stored energy capacitance value is not less than the intermediate variable value, the preliminary type selecting capability value of energy storage is determined
For the intermediate variable value, and carries out electrical security and check to determine the final type selecting capability value of energy storage；In the present embodiment, it wraps
It includes: when electrical security check passes through, determining that the final type selecting capability value of energy storage is the preliminary type selecting capability value of the energy storage；
When obstructed out-of-date, the preset step-length value of electrical security check, and the preliminary type selecting capability value of the energy storage is successively gradually dropped
The low step value successively carries out electrical security check, passes through until checking, then the final type selecting capability value of energy storage is to reduce by one
The preliminary type selecting capability value of energy storage after the secondary or multiple step value.
When the economic optimum stored energy capacitance value is less than the intermediate variable value, determine that the preliminary type selecting capability value of energy storage is
The economic optimum stored energy capacitance value, and carry out electrical security and check to determine the final type selecting capability value of energy storage.In this implementation
In example, comprising: when electrical security check passes through, determine that the final type selecting capability value of energy storage is the preliminary type selecting of the energy storage
Capability value；When obstructed out-of-date, the preset step-length value of electrical security check, and successively to the preliminary type selecting capability value of the energy storage
The step value is gradually reduced, electrical security check is successively carried out, is passed through until checking, then the final type selecting capability value of energy storage is
The preliminary type selecting capability value of energy storage after reducing one or many step values.
Referring to figure 3., in the present embodiment, the progress electrical security check, comprising:
According to the preliminary type selecting capacity of the energy storage, the high factory after calculating access energy-storage system becomes design peak load rate, if
The high factory becomes design peak load rate≤100%, then checks and pass through, otherwise check and do not pass through；
Based on unit HV Auxiliary Transformer actual motion maximum current value, according to the preliminary type selecting capacity of the energy storage, core
High factory after calculating access energy-storage system becomes actual motion peak load rate, if high factory's change actual motion peak load rate≤
100%, then it checks and passes through, otherwise check and do not pass through；
Based on unit HV Auxiliary Transformer actual motion minimum current value, according to the preliminary type selecting capacity of the energy storage, core
High factory after calculating access energy-storage system becomes the peak load rate for the when of falling power transmission, if the high factory becomes the peak load rate for the when of falling power transmission
≤ 100%, then it checks and passes through, otherwise check and do not pass through；
Based on unit HV Auxiliary Transformer actual motion minimum current value, according to the preliminary type selecting capacity of the energy storage, core
Main transformer peak load rate after calculating access energy-storage system is checked logical if main transformer peak load rate≤100%
It crosses, otherwise checks and do not pass through；
According to the preliminary type selecting capacity of the energy storage, the maximum possible short circuit current through excessively high factory's low pressure side bus is calculated
Value, compared with the rated short circuit drop-out current value of station service electrical system equipment, if the maximum possible short-circuit current value is less than described
Rated short circuit drop-out current value is then checked and is passed through, otherwise checks and do not pass through.
Combined with specific embodiments below, the present invention is described in detail.
The purpose of the present invention is to provide a kind of energy storage of power plant's energy storage auxiliary frequency modulation for becoming the technology of falling power transmission based on high factory
Extra electricity can be sent supreme factory change high-pressure side by constant volume method when energy storage is discharged, while when guaranteeing energy storage charge and discharge
Main transformer non-overloading when high factory becomes non-overloading, energy storage electric discharge, while optimal economic benefit.
The present invention is divided into six steps, and specific flow chart is shown in Fig. 1.
One, data collection
Data collection mainly includes electric power factory equipment parameter and existing actual operating data.
1, device parameter
Including main transformer and HV Auxiliary Transformer rated capacity, high-pressure side rated current, low-pressure side rated current, connect
Line group, impedance, voltage change ratio, rated short circuit drop-out current of station service electrical system equipment etc..
2, actual operating data
It participates in adjusting including acceptance of the bid history data, HV Auxiliary Transformer actual motion maximum/minimum current value, unit
Maximum output etc. when frequency.
Two, it calculates high factory and becomes design surplus capacity A
Become rated capacity and Design cooling load according to high factory, calculates high factory and become the design surplus capacity A accessed for energy storage.
Three, it calculates high factory and becomes actual motion surplus capacity AA
Become rated capacity and actual motion peak load according to high factory, calculates high factory and become the actual motion accessed for energy storage
Surplus capacity AA.
Four, simulation calculation economic optimum stored energy capacitance B
Including following two step:
1, simulation model is established
According to acceptance of the bid history data, the detailed rules and regulations regulation based on the frequency modulation ancillary service of project location domain, simulation calculation
Determine the existing unit model of power plant.
2, emulation determines optimal stored energy capacitance
On the basis of power plant model, the AGC regulation performance index of prediction joint frequency modulation after energy-storage system model is added, and
According to the corresponding Economic and Efficiency Analysis of stored energy capacitance, the optimal stored energy capacitance B of benefit is determined.
Five, the standard of energy-storage system constant volume is determined
It is less than calculated load since high factory becomes actual motion load, the standard of energy-storage system constant volume is divided into two classes: the
The mark that the case where one is to meet actual motion requirement as target, i.e., become actual motion using high factory checks as electrical security
It is quasi-；Second is to become the mark that calculated load is checked as electrical security using high factory to meet theoretical design requirements as target
It is quasi-.
Six, the final type selecting capacity of energy storage is determined
Calculation flow chart is shown in Fig. 2.
1, n=0, m=0 are enabled；
2, judge energy storage constant volume standard.If enabling intermediate variable G=AA to meet actual motion requirement as the project of target；
If enabling intermediate variable G=A to meet theoretical service requirement as the project of target.
If 3, B >=G, the preliminary type selecting capacity C=G of energy storage carries out electrical security check；
Pass through if 1) check, the final type selecting capacity P=C=G of energy storage；
Do not pass through if 2) check, using L as step-length, since G, stored energy capacitance value is gradually reduced, even energy storage is tentatively selected
Type capacity C=G-n × L (n=1,2 ...) successively carries out electrical security check, passes through until checking, then the final type selecting of energy storage
Capacity P=C=G-n × L；
// (calculate high factory because having and rise to affluence the G that capacity determines, and C≤G, so the purpose of step is to guarantee main transformer pressure
Device non-overloading.)
(3) if B < G, the preliminary type selecting capacity C=B of energy storage carries out electrical security check；
Pass through if 1) check, the final type selecting capacity P=B of energy storage；
Do not pass through if 2) check, using L as step-length, since B, stored energy capacitance value is gradually reduced, even energy storage is tentatively selected
Type capacity C=B-m × L (m=0,1,2 ...) successively carries out electrical security check, passes through until checking, then energy storage is tentatively selected
Type capacity P=C=B-m × L；
// (calculate high factory because having and rise to affluence the G that capacity determines, and C≤B < G, so the purpose of step is to guarantee main transformer
Depressor non-overloading.)
Wherein, electrical security is checked in terms of process is divided into five and is checked, and sees Fig. 3.
1, HV Auxiliary Transformer design capacity is calculated
According to the preliminary type selecting capacity C of energy storage, the high factory after calculating access energy-storage system becomes design peak load rate X, if X≤
100%, then it checks and passes through, otherwise check and do not pass through.
2, the practical peak load of HV Auxiliary Transformer is calculated
Based on unit HV Auxiliary Transformer actual motion maximum current value, according to the preliminary type selecting capacity C of energy storage, accounting is connect
High factory after entering energy-storage system becomes actual motion peak load rate Y, if Y≤100%, check passes through, and otherwise checks and does not pass through.
3, the HV Auxiliary Transformer peak load of falling power transmission is calculated
Based on unit HV Auxiliary Transformer actual motion minimum current value, according to the preliminary type selecting capacity C of energy storage, accounting is connect
High factory after entering energy-storage system becomes the peak load rate Z for the when of falling power transmission, if Z≤100%, check passes through, and otherwise checks obstructed
It crosses.
Wherein, high factory becomes the peak load of falling power transmission=C- station service minimum load Emin.
4, the practical peak load of main transformer is calculated
Based on unit HV Auxiliary Transformer actual motion minimum current value, according to the preliminary type selecting capacity C of energy storage, accounting is connect
Main transformer peak load rate W after entering energy-storage system, if W≤100%, check passes through, and otherwise checks and does not pass through.
Wherein, maximum output D+ (C- station service minimum load when main transformer peak load=unit participation frequency modulation
Emin)。
5, the short circuit current after energy-storage system access power plant's existing system is calculated
According to the preliminary type selecting capacity C of energy storage, the maximum possible short circuit current I through excessively high factory's low pressure side bus is calculated, with
The rated short circuit drop-out current Ie of station service electrical system equipment compares, if I < Ie, check passes through, and otherwise checks and does not pass through.
It should be noted that the case where transformer with split winding is used for HV Auxiliary Transformer, it can be to each of every unit
Section active section bus presses above step respectively and calculates and calculate, final to determine energy-storage system type selecting capacity.
The present invention provides it is a kind of based on high factory become the technology of falling power transmission power plant's energy storage assist frequency modulation energy storage constant volume method,
Have it is following the utility model has the advantages that
1, theoretical property, science, the accuracy of energy-storage system constant volume method are improved, to improve energy storage system capacity configuration
Reasonability.
2, the applicability for improving energy storage system capacity selection method in energy storage auxiliary frequency modulation project, is suitable for coal-fired electricity
A variety of power plant's types such as factory, Combined cycle gas-steam turbine power plant.
3, for Combined cycle gas-steam turbine power plant, become the technology of falling power transmission by high factory, station service power consumption rate is not re-used as energy storage
Restrictive condition when power selection, energy storage power can be promoted to a certain extent, unit frequency modulation performance be improved significantly.
4, to guarantee power plant and electric power netting safe running as the first element, guarantee that high factory becomes non-overloading, storage when energy storage charge and discharge
Main transformer non-overloading when can discharge, while optimal economic benefit.
5, more scientific and reasonable using different constant volume calculation process for different energy-storage system constant volume standards.
6, Power Plant Simulation model is established according to the actual operating data of power plant, stored energy capacitance is optimized based on simulation result, is filled
Divide the differentiation in view of unit performance between each power plant, accuracy is high.
7, it is provided for power plant's energy storage auxiliary frequency modulation project constant volume research based on the high factory change technology of falling power transmission scientific and reasonable
Foundation.
Particular embodiments described above has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that the above is only a specific embodiment of the present invention, the protection being not intended to limit the present invention
Range.It particularly points out, to those skilled in the art, all within the spirits and principles of the present invention, that is done any repairs
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of energy storage constant volume method of power plant's energy storage auxiliary frequency modulation characterized by comprising
Obtain electric power factory equipment supplemental characteristic and the existing actual operating data of equipment；
According to the electric power factory equipment supplemental characteristic and Design cooling load, calculates high factory and become the design surplus capacity accessed for energy storage
Value；
According to the electric power factory equipment supplemental characteristic and actual motion peak load, calculates high factory and become the practical fortune accessed for energy storage
Row surplus capacity value；
Simulation calculation economic optimum stored energy capacitance value is carried out according to the actual operating data；
It determines the standard of energy-storage system constant volume, and the design surplus capacity value and the actual motion surplus capacity value is distinguished
It is assigned to the intermediate variable value of the standard；
Judge the size between the economic optimum stored energy capacitance value and the intermediate variable value, respectively to determine that energy storage is tentatively selected
Type capability value, and carry out electrical security and check to determine the final type selecting capability value of energy storage.
2. the energy storage constant volume method of power plant's energy storage auxiliary frequency modulation as described in claim 1, which is characterized in that the electric power factory equipment
Supplemental characteristic includes: main transformer and HV Auxiliary Transformer rated capacity value, high-pressure side load current value, the specified electricity of low-pressure side
Flow valuve, wiring group, impedance value, voltage change ratio value and station service electrical system equipment rated short circuit drop-out current value；The reality
Operation data includes: that acceptance of the bid history data, HV Auxiliary Transformer actual motion maximum/minimum current value and unit participate in
Maximum output when frequency modulation.
3. the energy storage constant volume method of power plant's energy storage auxiliary frequency modulation as claimed in claim 2, which is characterized in that described according to
Actual operating data carries out simulation calculation economic optimum stored energy capacitance value, comprising:
According to acceptance of the bid history data, the detailed rules and regulations regulation based on the frequency modulation ancillary service of project location domain, simulation calculation is determined
The existing unit model of power plant；
On the basis of the power plant existing unit model, the AGC modulability of prediction joint frequency modulation after energy-storage system model is added
Energy index, and according to the corresponding Economic and Efficiency Analysis of stored energy capacitance, determine the optimal stored energy capacitance of benefit.
4. the energy storage constant volume method of power plant's energy storage auxiliary frequency modulation as described in claim 1, which is characterized in that the determining energy storage
The standard of system constant volume, and the design surplus capacity value and the actual motion surplus capacity value are assigned to the mark respectively
Quasi- intermediate variable value, comprising:
When to meet actual motion requirement as target, using high factory become actual motion the case where as electrical security check mark
It is quasi-；And the actual motion surplus capacity value is assigned to intermediate variable value；
When to meet theoretical design requirements as target, the standard that calculated load is checked as electrical security is become using high factory；And
The design surplus capacity value is assigned to intermediate variable value.
5. the energy storage constant volume method of power plant's energy storage auxiliary frequency modulation as claimed in claim 4, which is characterized in that described to judge respectively
Size between the economic optimum stored energy capacitance value and the intermediate variable value, to determine the preliminary type selecting capability value of energy storage, and
Electrical security is carried out to check to determine the final type selecting capability value of energy storage, comprising:
When the economic optimum stored energy capacitance value is not less than the intermediate variable value, determine that the preliminary type selecting capability value of energy storage is institute
Intermediate variable value is stated, and carries out electrical security and checks to determine the final type selecting capability value of energy storage；
When the economic optimum stored energy capacitance value is less than the intermediate variable value, determine that the preliminary type selecting capability value of energy storage is described
Economic optimum stored energy capacitance value, and carry out electrical security and check to determine the final type selecting capability value of energy storage.
6. the energy storage constant volume method of power plant's energy storage auxiliary frequency modulation as claimed in claim 5, which is characterized in that described to work as the warp
When optimal stored energy capacitance value of helping is not less than the intermediate variable value, determine that the preliminary type selecting capability value of energy storage is the intermediate variable
Value, and carry out electrical security and check to determine the final type selecting capability value of energy storage, comprising:
When electrical security check passes through, determine that the final type selecting capability value of energy storage is the preliminary type selecting capacity of the energy storage
Value；
When the electrical security check obstructed out-of-date, preset step-length value, and to the preliminary type selecting capability value of the energy storage successively by
Step reduces the step value, successively carries out electrical security check, passes through until checking, then the final type selecting capability value of energy storage is drop
The preliminary type selecting capability value of energy storage after low one or many step values.
7. the energy storage constant volume method of power plant's energy storage auxiliary frequency modulation as claimed in claim 5, which is characterized in that described to work as the warp
When optimal stored energy capacitance value of helping is less than the intermediate variable value, determine that the preliminary type selecting capability value of energy storage is the economic optimum energy storage
Capability value, and carry out electrical security and check to determine the final type selecting capability value of energy storage, comprising:
When electrical security check passes through, determine that the final type selecting capability value of energy storage is the preliminary type selecting capacity of the energy storage
Value；
When the electrical security check obstructed out-of-date, preset step-length value, and to the preliminary type selecting capability value of the energy storage successively by
Step reduces the step value, successively carries out electrical security check, passes through until checking, then the final type selecting capability value of energy storage is drop
The preliminary type selecting capability value of energy storage after low one or many step values.
8. the energy storage constant volume method of power plant's energy storage auxiliary frequency modulation as claimed in claim 2, which is characterized in that described to carry out electrically
Safety is checked, comprising:
According to the preliminary type selecting capacity of the energy storage, the high factory after calculating access energy-storage system becomes design peak load rate, if described
High factory becomes design peak load rate≤100%, then checks and pass through, otherwise check and do not pass through；
Based on unit HV Auxiliary Transformer actual motion maximum current value, according to the preliminary type selecting capacity of the energy storage, accounting is connect
High factory after entering energy-storage system becomes actual motion peak load rate, if the high factory becomes actual motion peak load rate≤100%,
It then checks and passes through, otherwise check and do not pass through；
Based on unit HV Auxiliary Transformer actual motion minimum current value, according to the preliminary type selecting capacity of the energy storage, accounting is connect
High factory after entering energy-storage system becomes the peak load rate for the when of falling power transmission, if the peak load rate of high factory's change when of falling power transmission≤
100%, then it checks and passes through, otherwise check and do not pass through；
Based on unit HV Auxiliary Transformer actual motion minimum current value, according to the preliminary type selecting capacity of the energy storage, accounting is connect
Main transformer peak load rate after entering energy-storage system, if main transformer peak load rate≤100%, check passes through,
Otherwise it checks and does not pass through；
According to the preliminary type selecting capacity of the energy storage, the maximum possible short-circuit current value through excessively high factory's low pressure side bus is calculated, with
The rated short circuit drop-out current value of station service electrical system equipment compares, if the maximum possible short-circuit current value is less than described specified short
Road drop-out current value is then checked and is passed through, otherwise checks and do not pass through.
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