CN108092291A - A kind of energy accumulation capacity configuration and system for meeting frequency modulation demand - Google Patents
A kind of energy accumulation capacity configuration and system for meeting frequency modulation demand Download PDFInfo
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- CN108092291A CN108092291A CN201711259932.8A CN201711259932A CN108092291A CN 108092291 A CN108092291 A CN 108092291A CN 201711259932 A CN201711259932 A CN 201711259932A CN 108092291 A CN108092291 A CN 108092291A
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- frequency modulation
- stored energy
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- energy capacitance
- electric system
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
-
- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/48—Controlling the sharing of the in-phase component
Abstract
The present invention relates to a kind of energy accumulation capacity configurations and system for meeting frequency modulation demand, and the stored energy capacitance parameter for meeting electric system primary frequency modulation demand that energy storage device participates in is obtained from electric system instruction；Stored energy capacitance parameter according to electric system primary frequency modulation demand is met, which calculates, meets electric system primary frequency modulation demand stored energy capacitance；It is calculated on the basis of primary frequency modulation demand stored energy capacitance and meets electric system frequency modulation frequency modulation demand stored energy capacitance；According to meeting electric system primary frequency modulation demand stored energy capacitance and the calculating of frequency modulation frequency modulation demand stored energy capacitance meets the stored energy capacitance of electric system frequency modulation demand；Meeting the stored energy capacitance of electric system frequency modulation demand includes the technology minimum capacity for meeting electric system difference frequency modulation demand.The present invention carries out stored energy capacitance configuration to meeting electric system primary frequency modulation demand and frequency modulation frequency modulation demand in current electric grid, obtains the technology minimum capacity for meeting electric system difference frequency modulation demand.So as to mitigate the insufficient control defect of current system fm capacity, the frequency stability of Operation of Electric Systems is improved.
Description
Technical field
The present invention relates to energy storage in electric system applied technical field, and in particular to a kind of energy storage for meeting frequency modulation demand is held
Measure collocation method and system.
Background technology
Frequency is one of important indicator for weighing power quality, it reflects the active power equilibrium of supply and demand in electric system
Basic status.Frequency stabilization is also the important electricabsorption agent of power network safety operation, and frequency anomaly will give electric system
Safe and stable operation and user bring extremely serious consequence, and security control device action can be triggered under serious unbalance, causes to cut machine
The security incidents such as cutting load.Therefore, key factor of the frequency as power system security stable operation, it is necessary to be carried out to it effectively
Control.
Traditional frequency modulation unit is mostly thermoelectricity and Hydropower Unit, due to the inherent shortcoming of these units, such as：Participating in frequency modulation
When exist：Response time is long, is caused frequency modulation amount is insufficient and the dead time is excessive etc. by accumulation of heat constraint；Also exist simultaneously：Climbing speed
Spend slowly, have communication delay and cannot accurately contribute etc. causes to lack of proper care or demodulate.In addition, participate in traditional machine of frequency modulation service
Group can increase unit abrasion, influence unit durability so that it provides frequency modulation service and is subject to centainly due to frequently adjusting output power
Limitation.And when breaking down in system or big disturbance causes relatively high power vacancy, synchronous generator sometimes can not be quick
Ground response is stablized with keep frequency, at this moment mostly by the peaces control means such as machine, cutting load are cut system to be maintained to stablize, is caused certain
Economy and social loss.Since generation of electricity by new energy is installed with surpassing the rapid growth of extra-high voltage direct-current transmission ratio in power grid so that
Mains frequency problem further protrudes, and existing frequency regulation capacity is substantially insufficient in system.
In recent years, with the fast development of various extensive energy storage technologies, there is " quick response ", " accurate tracking ", " spirit
It is living to contribute " etc. characteristics accumulation power supply as a kind of electric system frequency modulation supplementary means, be subjected to the extensive concern of industry,
Regulating power and response characteristic disclosure satisfy that the demand of electric system active power regulation.
At present, carry out the requirement that energy storage participates in system frequency modulation, be directed generally to the demand field that energy storage participates in system frequency modulation
The research of scape and control strategy,《Consider that energy storage participates in fast frequency hopping action moment and the capacity collocation method of depth》In one text
Do not classify to system difference frequency modulation demand, capacity configuration unification, the action moment and depth for considering energy storage be still
From energy storage body, capacity configuration scheme specific aim is poor, it is difficult to assess.Also focus primarily on energy storage in generation of electricity by new energy
Go out fluctuation stabilizes research, for the power-balance of local new energy station.
The capacity configuration mode of the prior art has the following disadvantages：
Current power system fm capacity deficiency, can not comprehensive descision stored energy capacitance, it is difficult to during the actual frequency modulation of guidance is applied
The selection of stored energy capacitance.
The content of the invention
It, can not comprehensive descision stored energy capacitance to solve current power system fm capacity deficiency, it is difficult to the actual frequency modulation of guidance
In the problem of the selection of stored energy capacitance, the object of the present invention is to provide a kind of stored energy capacitance configuration sides for meeting frequency modulation demand
Method and system, the present invention for meet respectively once in current electric grid, the energy accumulation capacity configuration of frequency modulation frequency modulation different demands,
It realizes from the method for system primary frequency modulation and frequency modulation frequency modulation demand angle comprehensive descision energy storage configuration capacity in electric system, it can
The selection of stored energy capacitance in the actual frequency modulation application of guidance forms energy storage frequency modulation configuration flow and the calculating side of meter and system requirements
Method.
The purpose of the present invention is what is realized using following technical proposals：
The present invention provides a kind of energy accumulation capacity configuration for meeting frequency modulation demand, thes improvement is that：
The stored energy capacitance for meeting electric system primary frequency modulation demand that energy storage device participates in is obtained from electric system instruction
Parameter；
According to the stored energy capacitance parameter for meeting electric system primary frequency modulation demand, calculating meets electric system primary frequency modulation need
Seek stored energy capacitance；
It is calculated on the basis of primary frequency modulation demand stored energy capacitance and meets electric system frequency modulation frequency modulation demand stored energy capacitance；
The minimum energy storage for meeting electric system primary frequency modulation demand stored energy capacitance and frequency modulation frequency modulation demand stored energy capacitance
Capacity is the stored energy capacitance for meeting electric system frequency modulation demand.
Further：The stored energy capacitance parameter for meeting electric system primary frequency modulation demand, including：
Primary frequency modulation is from response to the time stablized to primary frequency modulation, the power of primary frequency modulation demand and the lotus of energy storage device
Electricity condition, the charged upper limit and charged lower limit.
Further：The state-of-charge scope of the energy storage device is 20%~80%.
Further：It is described according to the stored energy capacitance parameter for meeting electric system primary frequency modulation demand, calculating meets electric power
The stored energy capacitance of system primary frequency modulation demand is expressed as：
Cpf=2PSTs+MAX[Cpf(1-SOCtop), CpfSOCbot]
In formula：CpfTo meet the stored energy capacitance of electric system primary frequency modulation demand, PsFor the power of primary frequency modulation demand, Ts
To determine the time of primary frequency modulation stabilization from response to primary frequency modulation, Ts=t according to primary frequency modulation dead zoneend-tstart, tendIt is frequency
Rate recover to primary frequency modulation stablize at the time of, tstartIt is the origination action moment that frequency modulation crosses dead zone ± α.
Further：Described calculated on the basis of primary frequency modulation demand stored energy capacitance meets electric system frequency modulation frequency modulation demand
Stored energy capacitance, including：
The stored energy capacitance parameter for meeting electric system frequency modulation frequency modulation demand is determined on primary frequency modulation Demand Base；
According to the stored energy capacitance parameter for meeting electric system frequency modulation frequency modulation demand, calculating meets electric system frequency modulation frequency modulation need
The stored energy capacitance asked.
Further：The stored energy capacitance parameter for meeting electric system frequency modulation frequency modulation demand, including：
The power product for the adjusting duration that the stored energy capacitance for the energy storage frequency modulation frequency modulation demand that electric system AGC is issued is set
Point, the stored energy capacitance required by energy storage frequency modulation frequency modulation set adjust the duration, primary frequency modulation demand energy storage device lotus
The charged upper limit of electricity condition and charged lower limit.
Further：Described calculated on the basis of primary frequency modulation demand stored energy capacitance meets electric system frequency modulation frequency modulation demand
Stored energy capacitance is expressed as：
In formula：CsfTo meet the stored energy capacitance of electric system frequency modulation frequency modulation demand, fptTracking power curve is issued for AGC,
TAGCFor required by energy storage frequency modulation frequency modulation stored energy capacitance set the adjusting duration,It is issued for electric system AGC
Energy storage frequency modulation frequency modulation demand stored energy capacitance set adjusting the duration power integral；SOCtopFor the charged upper limit；
SOCbotFor charged lower limit.
Further：It is determining described to meet electric system primary frequency modulation demand stored energy capacitance and frequency modulation frequency modulation demand energy storage
The minimum stored energy capacitance of capacity be the stored energy capacitance for meeting electric system frequency modulation demand after, further include：
Adjust the frequency modulation income for meeting the primary frequency modulation demand and frequency modulation frequency modulation demand；
According to the frequency modulation income calculation frequency modulation Increment of income, and the stored energy capacitance is determined according to frequency modulation Increment of income
The increment of technology minimum capacity；
Determine that stored energy capacitance finally configures according to the increment of the technology minimum capacity of stored energy capacitance.
Further：The frequency modulation income is expressed as：
Es=Cf·eu
The frequency modulation Increment of income is expressed as：
ΔEs=Δ Cf·(eu-Cu)
Wherein：ΔCfTo meet the technology minimum capacity increment of electric system difference frequency modulation demand；EsFor the tune of stored energy capacitance
Frequency income, euFor the frequency modulation income of unit stored energy capacitance；ΔEsFor the frequency modulation Increment of income of stored energy capacitance；
As the technology minimum capacity increment Delta C for meeting electric system difference frequency modulation demandfFor negative value when, stored energy capacitance is final
It is configured to C=Cf, otherwise, C=Cf+ΔCf。
The present invention also provides a kind of stored energy capacitances for meeting frequency modulation demand to configure system, thes improvement is that：Including：
Acquisition module meets electric system primary frequency modulation need for obtain that energy storage device participates in being instructed from electric system
The stored energy capacitance parameter asked；
First computing module, for according to the stored energy capacitance parameter for meeting electric system primary frequency modulation demand, calculating and meeting
Electric system primary frequency modulation demand stored energy capacitance；
Second computing module meets electric system frequency modulation frequency modulation for being calculated on the basis of primary frequency modulation demand stored energy capacitance
Demand stored energy capacitance；
The minimum energy storage for meeting electric system primary frequency modulation demand stored energy capacitance and frequency modulation frequency modulation demand stored energy capacitance
Capacity is the stored energy capacitance for meeting electric system frequency modulation demand.
Further：The stored energy capacitance parameter for meeting electric system primary frequency modulation demand, including：
The time that primary frequency modulation is stablized from response to primary frequency modulation, the power of primary frequency modulation demand and energy storage device it is charged
State, the charged upper limit and charged lower limit.
Further：Second computing module, including：
Determination unit, for determining that the energy storage for meeting electric system frequency modulation frequency modulation demand is held on primary frequency modulation Demand Base
Measure parameter；
Computing unit, for according to the stored energy capacitance parameter for meeting electric system frequency modulation frequency modulation demand, calculating to meet electric power
The stored energy capacitance of secondary system frequency modulation demand.
Further：It further includes：
Module is adjusted, for determining described to meet electric system primary frequency modulation demand stored energy capacitance and frequency modulation frequency modulation demand
The minimum stored energy capacitance of stored energy capacitance is after the stored energy capacitance for meeting electric system frequency modulation demand, accounting meets described one
The frequency modulation income of secondary frequency modulation demand and frequency modulation frequency modulation demand；
First determining module, for according to the frequency modulation income calculation frequency modulation Increment of income, and according to frequency modulation Increment of income
Determine the increment of the technology minimum capacity of the stored energy capacitance；
Second determining module, the increment for the technology minimum capacity according to stored energy capacitance determine that stored energy capacitance is finally matched somebody with somebody
It puts.
Compared with the immediate prior art, technical solution provided by the invention has an advantageous effect in that：
(1) a kind of energy accumulation capacity configuration for meeting frequency modulation demand proposed by the present invention is obtained from electric system instruction
The stored energy capacitance parameter for meeting electric system primary frequency modulation demand that energy storage device is taken to participate in；It is once adjusted according to electric system is met
The stored energy capacitance parameter calculating of frequency demand meets electric system primary frequency modulation demand stored energy capacitance；Hold in the energy storage of primary frequency modulation demand
It is calculated on the basis of amount and meets electric system frequency modulation frequency modulation demand stored energy capacitance；And meet electric system primary frequency modulation need according to described
Stored energy capacitance and frequency modulation frequency modulation demand stored energy capacitance is asked to calculate the stored energy capacitance for meeting electric system frequency modulation demand；It is described to meet electricity
The stored energy capacitance of Force system frequency modulation demand includes the technology minimum capacity for meeting electric system difference frequency modulation demand.In frequency modulation function
On taken into account system primary frequency modulation and a variety of frequency modulation demands of frequency modulation frequency modulation, can instruct actual frequency modulation apply in stored energy capacitance choosing
It selects.
(2) in practical application, the present invention has taken into full account the frequency modulation cycle in actual production and the best effort shape of energy storage
State by the way that system primary frequency modulation and frequency modulation frequency modulation maximum is taken to determine the minimum technology capacity configuration of energy storage, and sets judgement to adjust
Frequency incremental income to judge minimum economic technical capacity of the energy storage for system frequency modulation, introduces economic indicator, so as to draw energy
The energy storage economic optimization configuration capacity taken into account to system frequency modulation and energy storage frequency modulation income.
Description of the drawings
Fig. 1 is the electric system for having energy storage to participate in synthesis frequency modulation control model provided by the invention；
Fig. 2 is participation electric system primary frequency modulation stored energy capacitance operation interval schematic diagram provided by the invention；
Fig. 3 is participation electric system frequency modulation frequency modulation stored energy capacitance operation interval schematic diagram provided by the invention；
Fig. 4 is electric system energy storage frequency regulation capacity configuration flow figure provided by the invention；
Fig. 5 is the flow chart of the energy accumulation capacity configuration provided by the invention for meeting frequency modulation demand.
Specific embodiment
The specific embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.
The following description and drawings fully show specific embodiments of the present invention, to enable those skilled in the art to
Put into practice them.Other embodiments can include structure, logic, it is electrical, process and other change.Embodiment
Only represent possible variation.Unless explicitly requested, otherwise individual component and function are optional, and the order operated can be with
Variation.The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.This hair
The scope of bright embodiment includes equivalent obtained by the gamut of claims and all of claims
Object.Herein, these embodiments of the invention can individually or generally be represented that this is only with term " invention "
For convenience, and if in fact disclosing the invention more than one, it is not meant to automatically limit the scope of the application to appoint
What single invention or inventive concept.
The present invention proposes a kind of energy storage configuration method for meeting frequency modulation demand, is considering energy storage configuration place and is participating in adjusting
When inscribe, build stored energy capacitance allocation plan, establish the Controlling model that energy storage meets primary frequency modulation, frequency modulation frequency modulation, formed and considered
The energy storage frequency modulation configuration flow and computational methods of system requirements to mitigate the frequency modulation pressure of complex large power grid, improve electric system
The frequency regulation capability and operation stability of operation.
The flow chart of the energy accumulation capacity configuration provided by the invention for meeting frequency modulation demand is as shown in figure 5, the satisfaction
The energy accumulation capacity configuration of frequency modulation demand can include：
The stored energy capacitance for meeting electric system primary frequency modulation demand that energy storage device participates in is obtained from electric system instruction
Parameter；
Stored energy capacitance parameter according to electric system primary frequency modulation demand is met, which calculates, meets electric system primary frequency modulation need
Seek stored energy capacitance；
It is calculated on the basis of primary frequency modulation demand stored energy capacitance and meets electric system frequency modulation frequency modulation demand stored energy capacitance；
The minimum energy storage for meeting electric system primary frequency modulation demand stored energy capacitance and frequency modulation frequency modulation demand stored energy capacitance
Capacity is the stored energy capacitance for meeting electric system frequency modulation demand.
Specifically：
The present invention is based on system difference frequency modulation demand is considered, important hand of the energy-storage units as system auxiliary frequency modulation is introduced
Section, as shown in Figure 1.In Fig. 1, the control method schematic diagram for meeting primary frequency modulation and frequency modulation frequency modulation needs is given, including control
Signal, controlling unit and control function etc..
In Fig. 1, being disturbed in system, after deviation delta f occurs for system frequency, the primary frequency modulation of system will act,
Half camber line has marked the control area of primary frequency modulation in Fig. 1, this process is the autokinesis of system performance, the tune in power plant
Fast device participates in primary frequency modulation, and action adjusting is carried out by governor Gov (s) and steam turbine/hydraulic turbine Gen (s) in figure, participates in
The power increment Δ P that the energy storage of primary frequency modulation will undertake according to the needs of energy-storage units are distributed tos(conventional power unit is equivalent to herein
Primary frequency control ability) carry out autokinesis adjusting, since emergent power vacancy after system disturbance/surplus can work(between initiation area
Rate exchanges, therefore region dominant eigenvalues increment Delta PTUsing as the input condition of frequency modulation frequency modulation, interconnection is thus calculated
The value of power deviation ACE using ACE or Δ f signals as feedback, starts energy-storage units and participates in frequency modulation frequency modulation, as secondary in Fig. 1
Shown in half camber line of frequency modulation.The adjusting that energy-storage units are completed forms the power Δ P of additional issue together with conventional rackG, born with the whole network
Lotus increment Delta PLIt compares, the inertia reflected in system adjusts and frequency variation.What Fig. 1 was provided be exactly energy storage participate in once and
The control process schematic of frequency modulation frequency modulation.
ACE controls error (Area Control Error), Δ P for system realmTFor dominant eigenvalues increment, Δ PLFor
The whole network total load increment, Δ PCFor the control power increment of frequency modulation frequency modulation, Δ PPFor the control power increment of primary frequency modulation, Δ PG
For the mechanical output of unit additional issue, Δ PsFor the power increment that energy storage is needed to undertake, R is generator difference coefficient.Gov (s) is
Governor,TGIt (is usually taken 0.2 second) for governor time constant；Gen (s) be steam turbine or the hydraulic turbine,TCHFor first order inertial loop time constant；Sys (s) is equivalent electric system, can be acquired according to load；K
(s) device, Sto (s) are energy-storage units in order to control, and R is difference coefficient.
Since primary frequency modulation and frequency modulation frequency modulation are happened at different periods in electric system, the control usually occurred successively
Journey, can realize decoupling control in sequential, therefore when energy storage is used for system frequency modulation, consider the utilization ratio of energy storage device, can
Using distributing stored energy capacitance rationally, to meet the method for system difference frequency modulation demand, collocation method should take into account primary frequency modulation and
The regulatory demand of frequency modulation frequency modulation.
(2) energy storage participates in the collocation method of system frequency modulation
The stored energy capacitance for meeting primary frequency modulation demand is configured first, calculating principle is as follows：
Determine energy storage device primary frequency modulation dead zone ± α, it is assumed that PsFor the power needed for primary frequency modulation, (power shortage is full of
It is remaining), the time that primary frequency modulation is stablized from response to frequency retrieval to primary frequency modulation is Ts(since energy storage device response is exceedingly fast, it can
Regard no-delay response as, therefore the time is since mains frequency crosses the dead zone of primary frequency modulation, reaches primary frequency modulation most
The time of big load adjustment amplitude, Ts=tend-tstart, tendAt the time of being that frequency retrieval to primary frequency modulation is stablized, tstartIt is to adjust
Frequency crosses the origination action moment of dead zone ± α), it is C to make the rational capacity that the energy storage device is completed needed for primary frequency modulationpf, consider
The efficiency and economy of energy storage device, operate at centre 50% to meet and absorb/the needs of sending power, participate in system frequency modulation
Energy storage be mainly battery energy storage, therefore need to consider its state-of-charge scope (lower limit SOCbot, upper limit SOCtop, it is usually 20%
~80%) frequency regulation capacity formula, is then can obtain as Cpf=2PSTs+MAX[Cpf(1-SOCtop), CpfSOCbot], according to energy storage device
The charged bound of reality, can be in the hope of meeting the stored energy capacitance C needed for primary frequency modulationpf.Energy storage device works in normal frequency modulation
Section is as shown in Figure 2.
As shown in Fig. 2, CpfTo meet the stored energy capacitance needed for primary frequency modulation, PsFor the power (power needed for primary frequency modulation
Vacancy or surplus), TsThe time stablized for primary frequency modulation from response to frequency retrieval to primary frequency modulation.Fig. 2, which gives, once to be adjusted
The configuration composition and operation interval of stored energy capacitance needed for frequency can absorb or send the power tune needed for system under normality operating point
Section demand, while maximum charged limit value capacity limit value should be escaped.
In fig. 2 it can be seen that configuration stored energy capacitance when each several part capacity composition and Consideration.Operation interval is
2PsTs is to consider that energy storage device completes the charge and discharge power interval of capacity needed for frequency modulation, is had a detailed description in the preceding paragraph.Normality
When operating point just refers to be not involved in frequency modulation, that is, under holding state energy storage device state, at 50% stored energy capacitance, at this time
No matter system is that either vacancy energy storage device can meet the frequency modulation demand for absorbing or sending power to power surplus, so
Energy storage device will return to this operating point when not adjusting.
Its is secondary to meet electric system frequency modulation frequency modulation demand, and stored energy capacitance configuration calculating principle is as follows：
The optimum Working and work schedule of energy storage, particularly automatic generation are considered in the calculating of specific frequency regulation capacity
In the capacity configuration for controlling AGC (Automatic Generation Control) frequency modulation frequency modulation, automated according to actual electric network
Level, frequency modulation frequency modulation only consider that AGC modes realize automatic frequency adjustment.Frequency modulation frequency modulation is completed in energy storage need to avoid the normal fluctuation Δ of load
P considers that energy storage need to complete AGC and issue tracking power curve fpt(issue once command within every 15 minutes), therefore system AGC is issued
Stored energy capacitance required by energy storage frequency modulation frequency modulation should be arranged to adjusting duration TAGC(generally 30 seconds to 15 minutes)
Power integralConsider energy storage charge state scope (lower limit SOCbot, upper limit SOCtop, it is usually 20%~80%),
Then can obtain frequency modulation frequency modulation capacity formula isRoot
It, can be in the hope of meeting the stored energy capacitance C needed for frequency modulation frequency modulation according to the charged bound of the reality of energy storage devicesf.Energy storage device is just
Normal frequency modulation operation interval is as shown in Figure 3.
As shown in figure 3, CsfTo meet the stored energy capacitance needed for frequency modulation frequency modulation, fptTracking power curve, T are issued for AGCAGC
To adjust the duration.Fig. 3 gives the configuration composition and operation interval of stored energy capacitance needed for frequency modulation frequency modulation, when adjusting lasting
Interior adjusting follows AGC to issue tracking power curve, while should escape maximum charged limit value capacity limit value.
What Fig. 2 and Fig. 3 was provided is exactly the capacity configuration composition for participating in primary frequency modulation and frequency modulation frequency modulation energy storage device.Due to one
Secondary frequency modulation is short time spontaneous adjusting, stored energy capacitance is required high, it is necessary to operate in the state that can be met the requirements at any time, therefore set
Normality operating point has been put, and frequency modulation frequency modulation is the slow adjusting of dozens of minutes grade, to the initial operating state of energy storage device
Ask, and AGC adjustings are up and down adjustment processes that a charge and discharge is put, thus energy storage device will be determined according to primary frequency modulation it is normal
Under being run at state operating point 50%, frequency modulation frequency modulation demand can be met, so normality operating point need not be set herein.
In the primary frequency modulation and frequency modulation frequency modulation that participate in system in energy storage, capacity configuration can bear most all in accordance with system
Big load disturbance (power surplus or power shortage) is set, the maximum that both the configuration capacity of final energy storage should take, i.e.,
Cf=max (Cpf, Csf), obtained energy storage configuration capacity is the technology minimum capacity for meeting system difference frequency modulation demand.
Theoretically, stored energy capacitance is bigger, and the fm capacity of energy-storage units is stronger, but economy is poorer.Finally determining
During stored energy capacitance value, its Technical Economy is considered as.
Energy storage participates in secondary system frequency modulation can be converted to income according to assistant service, therefore can be according to energy storage secondary
The frequency regulation capacity completed in frequency modulation adjusts its frequency modulation income, is set to ES=Cf·eu, wherein euFor the tune of unit stored energy capacitance
Frequency income, the value fluctuate under market environment, frequency modulation quotation are provided according to the size of system frequency modulation demand, if unit
Capacity energy storage investment is Cu, then frequency modulation Increment of income is Δ Es=Δ Cf·(eu-Cu), which is more than zero, then its newly-increased capacity can
Obtain income, good economy performance, it is proposed that stored energy capacitance is finally configured to C=Cf+ΔCfIf newly-increased stored energy capacitance is negative value, illustrate
Current stored energy capacitance is technology minimum capacity, does not possess dilatation basis economically, and stored energy capacitance is finally configured to C=Cf, it is full
The stored energy capacitance selection flow of pedal system difference frequency modulation demand is as shown in Figure 4.
In Fig. 4, electric system energy storage frequency regulation capacity configuration flow figure, first computing system primary frequency modulation and secondary tune respectively
Stored energy capacitance needed for frequency, then compare maximum in selection the two, you can while meet the capacity requirement of two kinds of frequency modulation, currently should
Be worth for technology minimum capacity, judge that can stored energy capacitance increment obtain income, if income just, to adjust stored energy capacitance configuration,
Such as：Stored energy capacitance configuration can be increased, stored energy capacitance is finally configured to C=Cf+ΔCf, it is made to participate in being to a greater extent
Frequency of uniting is adjusted, if income is negative, is not possessed dilatation basis economically, is selected its technology minimum capacity.
Embodiment two,
Based on same inventive concept, the present invention also provides a kind of stored energy capacitances for meeting frequency modulation demand to configure system, institute
The system of stating can include：
Acquisition module meets electric system primary frequency modulation need for obtain that energy storage device participates in being instructed from electric system
The stored energy capacitance parameter asked；
First computing module meets electricity for being calculated according to the stored energy capacitance parameter for meeting electric system primary frequency modulation demand
Force system primary frequency modulation demand stored energy capacitance；
Second computing module meets electric system frequency modulation frequency modulation for being calculated on the basis of primary frequency modulation demand stored energy capacitance
Demand stored energy capacitance；
The minimum energy storage for meeting electric system primary frequency modulation demand stored energy capacitance and frequency modulation frequency modulation demand stored energy capacitance
Capacity is the stored energy capacitance for meeting electric system frequency modulation demand.
Further：The stored energy capacitance parameter for meeting electric system primary frequency modulation demand, including：
The time that primary frequency modulation is stablized from response to primary frequency modulation, the power of primary frequency modulation demand and energy storage device it is charged
State, the charged upper limit and charged lower limit.
Further：Second computing module, including：
Determination unit, for determining that the energy storage for meeting electric system frequency modulation frequency modulation demand is held on primary frequency modulation Demand Base
Measure parameter；
Computing unit, for according to the stored energy capacitance parameter for meeting electric system frequency modulation frequency modulation demand, calculating to meet electric power
The stored energy capacitance of secondary system frequency modulation demand.
Further, the system can be with：
Module is adjusted, for determining described to meet electric system primary frequency modulation demand stored energy capacitance and frequency modulation frequency modulation demand
The minimum stored energy capacitance of stored energy capacitance is after the stored energy capacitance for meeting electric system frequency modulation demand, accounting meets described one
The frequency modulation income of secondary frequency modulation demand and frequency modulation frequency modulation demand；
First determining module, for according to the frequency modulation income calculation frequency modulation Increment of income, and according to frequency modulation Increment of income
Determine the increment of the technology minimum capacity of the stored energy capacitance；
Second determining module, the increment for the technology minimum capacity according to stored energy capacitance determine that stored energy capacitance is finally matched somebody with somebody
It puts.
The present invention for meet respectively once in current electric grid, the energy accumulation capacity configuration of frequency modulation frequency modulation different demands,
Based on grid power vacancy and frequency modulation temporal characteristics, temporally with two, space scale structure stored energy capacitance allocation plan, establish
Energy storage participates in the Controlling model of primary frequency modulation and frequency modulation frequency modulation, forms energy storage frequency modulation configuration flow and the calculating of meter and system requirements
Method so as to mitigate the insufficient control defect of current system fm capacity, improves the frequency stability of Operation of Electric Systems.
It should be understood by those skilled in the art that, embodiments herein can be provided as method, system or computer program
Product.Therefore, the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware can be used in the application
Apply the form of example.Moreover, the computer for wherein including computer usable program code in one or more can be used in the application
The computer program production that usable storage medium is implemented on (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The application is with reference to the flow according to the method for the embodiment of the present application, equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that it can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
The processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that the instruction performed by computer or the processor of other programmable data processing devices is generated for real
The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction generation being stored in the computer-readable memory includes referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps is performed on calculation machine or other programmable devices to generate computer implemented processing, so as in computer or
The instruction offer performed on other programmable devices is used to implement in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, although with reference to above-described embodiment pair
The present invention is described in detail, those of ordinary skill in the art still can to the present invention specific embodiment into
Row modification either equivalent substitution these without departing from any modification of spirit and scope of the invention or equivalent substitution, applying
Within the claims of the pending present invention.
Claims (13)
1. a kind of energy accumulation capacity configuration for meeting frequency modulation demand, it is characterised in that：
The stored energy capacitance parameter for meeting electric system primary frequency modulation demand that energy storage device participates in is obtained from electric system instruction；
According to the stored energy capacitance parameter for meeting electric system primary frequency modulation demand, calculating meets the storage of electric system primary frequency modulation demand
It can capacity；
It is calculated on the basis of primary frequency modulation demand stored energy capacitance and meets electric system frequency modulation frequency modulation demand stored energy capacitance；
The minimum stored energy capacitance for meeting electric system primary frequency modulation demand stored energy capacitance and frequency modulation frequency modulation demand stored energy capacitance
For the stored energy capacitance for meeting electric system frequency modulation demand.
2. energy accumulation capacity configuration as described in claim 1, it is characterised in that：It is described to meet electric system primary frequency modulation need
The stored energy capacitance parameter asked, including：
Primary frequency modulation is from response to the time stablized to primary frequency modulation, the power of primary frequency modulation demand and the charged shape of energy storage device
State, the charged upper limit and charged lower limit.
3. energy accumulation capacity configuration as claimed in claim 2, it is characterised in that：The state-of-charge scope of the energy storage device
For 20%~80%.
4. energy accumulation capacity configuration as claimed in claim 1 or 2, it is characterised in that：It is described unified according to power train is met
The stored energy capacitance parameter of secondary frequency modulation demand, the stored energy capacitance that calculating meets electric system primary frequency modulation demand are expressed as：
Cpf=2PSTs+MAX[Cpf(1-SOCtop), CpfSOCbot]
In formula：CpfTo meet the stored energy capacitance of electric system primary frequency modulation demand, PsFor the power of primary frequency modulation demand, TsFor root
The time of primary frequency modulation stabilization from response to primary frequency modulation, Ts=t are determined according to primary frequency modulation dead zoneend-tstart, tendIt is that frequency is extensive
At the time of stabilization again to primary frequency modulation, tstartIt is the origination action moment that frequency modulation crosses dead zone ± α.
5. energy accumulation capacity configuration as described in claim 1, it is characterised in that：It is described in primary frequency modulation demand stored energy capacitance
On the basis of calculate meet electric system frequency modulation frequency modulation demand stored energy capacitance, including：
The stored energy capacitance parameter for meeting electric system frequency modulation frequency modulation demand is determined on primary frequency modulation Demand Base；
According to the stored energy capacitance parameter for meeting electric system frequency modulation frequency modulation demand, calculating meets electric system frequency modulation frequency modulation demand
Stored energy capacitance.
6. energy accumulation capacity configuration as claimed in claim 5, it is characterised in that：It is described to meet electric system frequency modulation frequency modulation need
The stored energy capacitance parameter asked, including：
The power integral for the adjusting duration that the stored energy capacitance for the energy storage frequency modulation frequency modulation demand that electric system AGC is issued is set,
The adjusting duration of stored energy capacitance setting required by energy storage frequency modulation frequency modulation, the charged shape of the energy storage device of primary frequency modulation demand
The charged upper limit of state and charged lower limit.
7. energy accumulation capacity configuration as described in claim 1, it is characterised in that：It is described in primary frequency modulation demand stored energy capacitance
On the basis of calculate and meet electric system frequency modulation frequency modulation demand stored energy capacitance and be expressed as：
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In formula：CsfTo meet the stored energy capacitance of electric system frequency modulation frequency modulation demand, fptTracking power curve, T are issued for AGCAGCFor
The adjusting duration that stored energy capacitance required by energy storage frequency modulation frequency modulation is set,The storage issued for electric system AGC
The power integral for the adjusting duration that the stored energy capacitance of energy frequency modulation frequency modulation demand is set；SOCtopFor the charged upper limit；SOCbotFor
Charged lower limit.
8. energy accumulation capacity configuration as described in claim 1, it is characterised in that：It is determining described to meet electric system once
The minimum stored energy capacitance of frequency modulation demand stored energy capacitance and frequency modulation frequency modulation demand stored energy capacitance meets electric system frequency modulation need to be described
After the stored energy capacitance asked, further include：
Adjust the frequency modulation income for meeting the primary frequency modulation demand and frequency modulation frequency modulation demand；
According to the frequency modulation income calculation frequency modulation Increment of income, and determine according to frequency modulation Increment of income the technology of the stored energy capacitance
The increment of minimum capacity；
Determine that stored energy capacitance finally configures according to the increment of the technology minimum capacity of stored energy capacitance.
9. energy accumulation capacity configuration as claimed in claim 8, it is characterised in that：The frequency modulation income is expressed as：
Es=Cf·eu
The frequency modulation Increment of income is expressed as：
ΔEs=Δ Cf·(eu-Cu)
Wherein：ΔCfTo meet the technology minimum capacity increment of electric system difference frequency modulation demand；EsIt is received for the frequency modulation of stored energy capacitance
Benefit, euFor the frequency modulation income of unit stored energy capacitance；ΔEsFor the frequency modulation Increment of income of stored energy capacitance；
As the technology minimum capacity increment Delta C for meeting electric system difference frequency modulation demandfFor negative value when, stored energy capacitance finally configures
For C=Cf, otherwise, C=Cf+ΔCf。
10. a kind of stored energy capacitance configuration system for meeting frequency modulation demand, it is characterised in that：Including：
Acquisition module meets electric system primary frequency modulation demand for obtain that energy storage device participates in being instructed from electric system
Stored energy capacitance parameter；
First computing module, for according to the stored energy capacitance parameter for meeting electric system primary frequency modulation demand, calculating to meet electric power
System primary frequency modulation demand stored energy capacitance；
Second computing module meets electric system frequency modulation frequency modulation demand for being calculated on the basis of primary frequency modulation demand stored energy capacitance
Stored energy capacitance；
The minimum stored energy capacitance for meeting electric system primary frequency modulation demand stored energy capacitance and frequency modulation frequency modulation demand stored energy capacitance
For the stored energy capacitance for meeting electric system frequency modulation demand.
11. stored energy capacitance as claimed in claim 10 configures system, it is characterised in that：It is described to meet electric system primary frequency modulation
The stored energy capacitance parameter of demand, including：
The time that primary frequency modulation is stablized from response to primary frequency modulation, the power of primary frequency modulation demand and the charged shape of energy storage device
State, the charged upper limit and charged lower limit.
12. stored energy capacitance as claimed in claim 10 configures system, it is characterised in that：Second computing module, including：
Determination unit, for determining the stored energy capacitance ginseng for meeting electric system frequency modulation frequency modulation demand on primary frequency modulation Demand Base
Number；
Computing unit, for according to the stored energy capacitance parameter for meeting electric system frequency modulation frequency modulation demand, calculating to meet electric system
The stored energy capacitance of frequency modulation frequency modulation demand.
13. stored energy capacitance as claimed in claim 10 configures system, it is characterised in that：It further includes：
Module is adjusted, for determining described to meet electric system primary frequency modulation demand stored energy capacitance and frequency modulation frequency modulation demand energy storage
The minimum stored energy capacitance of capacity be the stored energy capacitance for meeting electric system frequency modulation demand after, adjust meet described in once adjust
The frequency modulation income of frequency demand and frequency modulation frequency modulation demand；
First determining module for according to the frequency modulation income calculation frequency modulation Increment of income, and is determined according to frequency modulation Increment of income
The increment of the technology minimum capacity of the stored energy capacitance；
Second determining module, the increment for the technology minimum capacity according to stored energy capacitance determine that stored energy capacitance finally configures.
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