CN114188959A - Electric power system energy storage configuration calculation method based on new energy electric power abandonment - Google Patents
Electric power system energy storage configuration calculation method based on new energy electric power abandonment Download PDFInfo
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- CN114188959A CN114188959A CN202111394866.1A CN202111394866A CN114188959A CN 114188959 A CN114188959 A CN 114188959A CN 202111394866 A CN202111394866 A CN 202111394866A CN 114188959 A CN114188959 A CN 114188959A
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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
- H02J3/38—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
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
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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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
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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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/40—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation wherein a plurality of decentralised, dispersed or local energy generation technologies are operated simultaneously
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The invention belongs to the technical field of new energy of an electric power system, and particularly relates to an electric power system energy storage configuration calculation method based on electric power abandonment of new energy, which aims to improve the utilization rate of the new energy, combines actual operation data with prediction data, is not influenced by an electric network net rack in calculation, does not relate to an intelligent algorithm in the calculation process, and has strong practicability; according to the method, a new energy abandoned electric power curve is obtained by obtaining a calculation boundary condition, an initial energy storage configuration value is obtained based on the new energy abandoned electric power curve, the utilization rate of new energy after energy storage configuration is calculated, and the power and energy of the power grid configuration energy storage are obtained; the invention is widely applied to the technical field of new energy of electric power systems.
Description
Technical Field
The invention belongs to the technical field of new energy of an electric power system, and particularly relates to an electric power system energy storage configuration calculation method based on electric power abandoned by new energy.
Background
The rapid growth of new energy accords with the concept of green development, but the uncertainty of wind/light resources, the intermittence and the volatility of the new energy and the disorder of new energy access bring serious challenges to the safe and stable operation of a power grid and the consumption of the new energy.
The energy storage has the technical characteristics of quick response and bidirectional adjustment, can match the output of new energy in real time, is an important support for the development of the new energy, also has the technical advantages of strong environmental adaptability, small-sized dispersed configuration and short construction period, and can play different roles on the power supply, the power grid and the load side of a power system. The configuration of energy storage needs to be developed by combining the structure and the operation characteristics of a power grid and the output characteristics of new energy, so that the power and the energy of the stored energy need to be calculated by combining actual abandoned electric power.
Disclosure of Invention
The invention overcomes the defects in the prior art, provides the electric power system energy storage configuration calculation method based on the new energy electric power abandonment to solve the problem of power and energy configuration requirements of the electric power system configuration energy storage, and the method carries out calculation based on the actual electric power abandonment rate, does not need iterative calculation, and has strong applicability and engineering practicability.
In order to solve the technical problems, the invention adopts the technical scheme that: a power system energy storage configuration calculation method based on new energy abandoned electric power comprises the following steps:
s1, acquiring and calculating a required data set, wherein the required data set comprises available power of new energy, exchange power of tie lines, electric load, the number of conventional power supplies, installed capacity and maximum/minimum technical output;
S2, calculating the new energy generating capacity E when the energy storage is not configured through a production simulation methodpElectric power P abandoned by new energy1(t) electric power discard EaObtaining the maximum value P of the electric power abandoned by the new energy1maxAnd the electric power abandoning rate eta of new energy0The frequency i of continuous electricity abandonment of the new energy source;
s3, calculating the electric quantity E of the new energy discarded which should be reduced after the energy storage is configuredδ;
S4, calculating the upper limit P of the energy storage configuration powerES-maxAnd a lower limit PES-minConfiguring an upper limit PES-maxSelecting P1Maximum value and lower limit of (t)ES-minThe energy storage power of the electricity abandoning quantity reduced after configuration can be met when the conditions such as the energy storage capacity, the dischargeable space and the like are not considered;
s5, selecting n energy storage configuration powers between the upper limit and the lower limit of the energy storage power according to the step length to obtain energy storage configuration powerRate sequence
S6, discarding electric power P according to the new energy obtained in S21(t) obtaining the single maximum electric quantity E of electricity discarded in new energymaxAs initial value E of rated energy of stored energyESSetting the initial value of stored energy to be E0;
S7, configuring power sequence in the energy storageSelecting energy storage power, calculating the electricity abandoning quantity E reduced by continuous one-time charging and discharging of the energy storage under the powerj;
S8, accumulating the reduced electricity abandoning amount calculated in each charge-discharge period to obtain the reducible total electricity abandoning amount E after the configuration energy storaget;
S9, judging the reduced total electricity abandon quantity E tAnd the electricity abandonment quantity E which should be reduced after the energy storage is configuredδSize of (E), if Et>1.05EδThe stored energy is reduced, the total electricity discard amount which can be reduced under the energy is calculated, and when the stored energy is reduced to epsilon of the stored energy power1Judging that the energy storage configuration under the power has no solution; if Et<0.95EδThe stored energy is increased, the total electricity discard amount which can be reduced under the energy is calculated, and when the stored energy is increased to epsilon of the stored energy power2When the power is doubled, judging that the energy storage configuration under the power has no solution; when 0.95Eδ<Et<1.05EδObtaining a power and energy solution of a group of energy storage configurations;
s10, repeating S7-S9 until traversingObtaining the value of the stored energy power to finally obtain a group of stored energy power and energy configuration sequences [ P, E ]]。
Configuring the electricity abandoning amount E to be reduced after energy storage in the step S3δCalculated from the following formula:
Eδ=Ea-Em×η1
in the formula: eaRepresenting the electric quantity of the new energy when the stored energy is not configured; emRepresenting the available power generation amount of the new energy; eta1And representing the power abandonment rate of the new energy source target.
The lower limit P of the energy storage power configuration in the step S4ES-minAnd an upper limit PES-maxCalculated from the following formula:
the electric energy abandon quantity E reduced by continuous one-time charging and discharging of the stored energy in the step S7jCalculated from the following formula:
in the formula: j represents that j is greater than or equal to 1 and is less than or equal to i when j is continuously discarded for the jth time; t is t j1、tj2、tj3A start charging time, an end charging time (start discharging time) and an end discharging time of j-th continuous power abandoning are shown; ej1Representing the chargeable electric quantity of the j-th continuous electricity abandoning energy storage system; ejcRepresenting the charging capacity of the energy storage system continuously abandoning the power at the jth time; e (t)j2) Represents tj2Energy is stored constantly; ej2The representation represents the dischargeable electric quantity of the j-th continuous electricity abandoning energy storage system; p2(t) represents the maximum discharge power acceptable to the power system; ejdThe discharge electric quantity of the energy storage system which continuously abandons electricity at the jth time is represented; ejThe power abandon quantity which can be reduced by j continuous power abandon after the energy storage is configured is shown; e(j+1)0Is shown asj +1 times of initial value of energy storage energy of continuous electricity abandonment.
The total electric energy discard E which can be reduced after energy storage is configured in the step S8tCalculated from the following formula:
the energy storage power and energy configuration sequence [ P, E ] of step S10 is represented as:
[P,E]=[{P1,E1},{P2,E2},…]。
compared with the prior art, the invention has the following beneficial effects.
1. The method aims at solving the problems of power and energy requirements of the configured energy storage of the power system, can effectively solve the problem of low utilization rate caused by rapid development of new energy, is not constrained by a power grid frame in the calculation, and has strong applicability.
2. The boundary condition for calculating the new energy discarded power is from actual operation data and prediction data based on the operation data, the discarded power is accurately calculated, the energy storage calculation comprises power calculation and energy calculation, the chargeable and dischargeable power rate and the energy storage power of an actual system are considered, and the calculation process is rigorous.
3. The method does not need iterative operation, and has simple steps and high calculation speed.
4. The method has strong practicability in practical engineering.
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The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a flow chart of energy storage configuration calculation according to the present invention.
Detailed Description
The invention is described in connection with fig. 1.
A power system energy storage configuration calculation method based on new energy abandoned electric power comprises the following steps:
s1, acquiring data required by calculation, including available power of new energy, exchange power of tie lines, electric load, number of conventional power supplies, installed capacity and maximum/minimum technical output;
s2, calculating the new energy generating capacity E when the energy storage is not configured through a production simulation methodpElectric power P abandoned by new energy1(t) electric power discard EaObtaining the maximum value P of the electric power abandoned by the new energy1maxNew energy power abandon rate eta0The frequency i of continuous electricity abandonment of the new energy source;
s3, calculating the electric quantity E of the new energy discarded which should be reduced after the energy storage is configuredδ;
S4, calculating the upper limit P of the energy storage configuration powerES-maxAnd a lower limit PES-minConfiguring an upper limit PES-maxSelecting P1Maximum value and lower limit of (t)ES-minThe energy storage power of the electricity abandoning quantity reduced after configuration can be met when the conditions such as the energy storage capacity, the dischargeable space and the like are not considered;
S5, selecting n energy storage configuration powers between the upper limit and the lower limit of the energy storage power according to the step length to obtain an energy storage configuration power sequence
S6, discarding electric power P according to the new energy obtained in S21(t) obtaining the single maximum electric quantity E of electricity discarded in new energymaxAs initial value E of rated energy of stored energyESSetting the initial value of stored energy to be E0;
S7, configuring power sequence in energy storageSelecting energy storage power, calculating the electricity abandon quantity E reduced by one continuous charge and discharge of the energy storage under the powerj;
S8, accumulating the calculated decreased electricity abandoning amount in each charge-discharge period to obtain the reducible total electricity abandoning amount E after the configuration energy storaget;
S9, judging the reduced total electricity abandon quantity EtAnd the electricity abandonment quantity E which should be reduced after the energy storage is configuredδSize of (E), if Et>1.05EδThe stored energy is reduced and the energy calculated for that energy is reducedWhen the stored energy is reduced to epsilon of the stored energy power1Judging that the energy storage configuration under the power has no solution; if Et<0.95EδThe stored energy is increased, the total electricity discard amount which can be reduced under the energy is calculated, and when the stored energy is increased to epsilon of the stored energy power2When the power is doubled, judging that the energy storage configuration under the power has no solution; when 0.95Eδ<Et<1.05EδObtaining a power and energy solution of a group of energy storage configurations;
s10, repeating S7-S9 until traversingObtaining the value of the stored energy power to finally obtain a group of stored energy power and energy configuration sequences [ P, E ] ]。
Preferably, the step S3 configures the electricity discarding amount E to be reduced after storing energyδCalculated from the following formula:
Eδ=Ea-Em×η1
in the formula: eaRepresenting the electric quantity of the new energy when the stored energy is not configured; emRepresenting the available power generation amount of the new energy; eta1And representing the power abandonment rate of the new energy source target.
Preferably, the energy storage power configuration lower limit P in step S4ES-minAnd an upper limit PES-maxCalculated from the following formula:
preferably, in the step S7, the energy is stored in a manner that the energy is discarded and the charge and discharge are reduced for one time continuouslyEjCalculated from the following formula:
in the formula: j represents that j is greater than or equal to 1 and is less than or equal to i when j is continuously discarded for the jth time; t is tj1、tj2、tj3A start charging time, an end charging time (start discharging time) and an end discharging time of j-th continuous power abandoning are shown; ej1Representing the chargeable electric quantity of the j-th continuous electricity abandoning energy storage system; ejcRepresenting the charging capacity of the energy storage system continuously abandoning the power at the jth time; e (t)j2) Represents tj2Energy is stored constantly; ej2The representation represents the dischargeable electric quantity of the j-th continuous electricity abandoning energy storage system; p2(t) represents the maximum discharge power acceptable to the power system; ejdThe discharge electric quantity of the energy storage system which continuously abandons electricity at the jth time is represented; ejThe power abandon quantity which can be reduced by j continuous power abandon after the energy storage is configured is shown; e (j+1)0And (4) representing the initial value of the energy storage energy of j +1 th continuous electricity abandonment.
Preferably, the total electricity discard amount E which can be reduced after energy storage is configured in step S8tCalculated from the following formula:
preferably, the energy storage power and energy configuration sequence [ P, E ] of step S10 is represented as:
[P,E]=[{P1,E1},{P2,E2},…]。
the above embodiments are merely illustrative of the principles of the present invention and its effects, and do not limit the present invention. It will be apparent to those skilled in the art that modifications and improvements can be made to the above-described embodiments without departing from the spirit and scope of the invention. Accordingly, it will be appreciated by those skilled in the art that various modifications and changes may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. A power system energy storage configuration calculation method based on new energy abandoned electric power comprises the following steps:
s1: acquiring a data set required by calculation;
s2: calculating the new energy generating capacity E when the energy storage is not configured through a production simulation methodpElectric power P abandoned by new energy1(t) and electric power discard quantity Ea;
S3: calculating the electricity abandon quantity E which should be reduced after configuring the energy storageδ;
S4: calculating upper limit P of energy storage configuration powerES-maxAnd a lower limit PES-min;
S5: selecting n energy storage configuration powers according to the upper limit and the lower limit of the energy storage configuration power and a certain step length to obtain an energy storage configuration power sequence
S6: abandoning electric power P according to the new energy1(t) obtaining the single maximum electric quantity E of electricity discarded in new energymaxAs initial value E of rated energy of stored energyESSetting the initial value of stored energy to be E0;
S7: configuring a power sequence in the energy storageSelecting energy storage power, calculating the electricity abandon quantity E reduced by one continuous charge and discharge of the energy storage under the powerj;
S8: accumulating the reduced electricity abandoning quantity calculated in each charge-discharge period to obtain the reducible total electricity abandoning quantity E after the energy storage is configuredt;
S9: for reduced total electric power discard EtAnd configuring the electricity abandoning quantity E which should be reduced after the energy storageδComparing the magnitudes of the energy storage configurations to obtain a power and energy solution of a group of energy storage configurations;
2. The method of claim 1, wherein the required data in step S1 includes available new energy power, tie line exchange power, electrical load, number of conventional power sources, installed capacity, and maximum/minimum technical output.
3. The method for calculating the energy storage configuration of the power system based on the electric power curtailment of the new energy according to claim 1, wherein the energy curtailment amount E that should be reduced after the energy storage is configured in the step S3 δCalculated from the following formula:
Eδ=Ea-Em×η1
in the formula: eaRepresenting the electric quantity of the new energy when the stored energy is not configured; emRepresenting the available power generation amount of the new energy; eta1And representing the target power abandonment rate of the new energy.
4. The method for calculating the energy storage configuration of the electric power system based on the electric power abandoned by the new energy resource as claimed in claim 1, wherein the energy storage power configuration lower limit P in the step S4ES-minAnd an upper limit PES-maxCalculated from the following formula:
6. the method for calculating the energy storage configuration of the power system based on the electric power curtailment of the new energy source as claimed in claim 1, wherein the energy storage amount E reduced by one continuous charging and discharging of the stored energy in step S7jCalculated from the following formula:
in the formula: j represents that j is greater than or equal to 1 and is less than or equal to i when j is continuously discarded for the jth time;
tj1、tj2、tj3a start charging time, an end charging time (start discharging time) and an end discharging time of j-th continuous power abandon are shown;
Ej1representing the chargeable electric quantity of the j-th continuous electricity abandoning energy storage system;
Ejcrepresenting the charging capacity of the energy storage system continuously abandoning the power at the jth time;
E(tj2) Represents tj2Energy is stored constantly;
Ej2the dischargeable electric quantity of the j-th continuous electricity abandoning energy storage system is represented;
P2(t) represents the maximum discharge power acceptable to the power system;
Ejdthe discharge electric quantity of the energy storage system which continuously abandons electricity at the jth time is represented;
Ejthe power abandon quantity which can be reduced by j continuous power abandon after the energy storage is configured is shown;
E(j+1)0and (4) representing the initial value of the energy storage energy of j +1 th continuous electricity abandonment.
7. The method as claimed in claim 1, wherein the method comprises calculating the energy storage configuration of the power system based on the electric power rejected from the new energy sourceThe total electricity discard amount E which can be reduced after the stored energy is configured in the step S8tCalculated from the following formula:
8. the method as claimed in claim 1, wherein in step S9, if E is the caset>1.05EδReducing the energy storage energy, calculating the total electricity discard amount which can be reduced under the energy, and when the energy storage energy is reduced to 1/epsilon of the energy storage power1Judging that the energy storage configuration under the power has no solution;
if Et<0.95EδThe stored energy is increased, the total electricity discard amount which can be reduced under the energy is calculated, and when the stored energy is increased to epsilon of the stored energy power2When the power is doubled, judging that the energy storage configuration under the power has no solution;
when 0.95Eδ<Et<1.05EδThen the power and energy solutions for the set of energy storage configurations in step S9 are obtained.
9. The method for calculating the energy storage configuration of the power system based on the electric power abandoned by the new energy, according to claim 1, wherein the step S10 is represented by the energy storage power and energy configuration sequence [ P, E ] as:
[P,E]=[{P1,E1},{P2,E2},…]。
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US20160156189A1 (en) * | 2012-11-15 | 2016-06-02 | Song Ci | Cloud Based Energy System |
CN108808744A (en) * | 2018-06-01 | 2018-11-13 | 国网冀北电力有限公司电力科学研究院 | There are the active control method for coordinating and system of the grid-connected power generation system of energy storage participation |
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