CN110336301B - Wind storage system auxiliary power grid primary frequency modulation capacity configuration method based on series-parallel structure - Google Patents
Wind storage system auxiliary power grid primary frequency modulation capacity configuration method based on series-parallel structure Download PDFInfo
- Publication number
- CN110336301B CN110336301B CN201910584349.7A CN201910584349A CN110336301B CN 110336301 B CN110336301 B CN 110336301B CN 201910584349 A CN201910584349 A CN 201910584349A CN 110336301 B CN110336301 B CN 110336301B
- Authority
- CN
- China
- Prior art keywords
- frequency modulation
- storage system
- energy storage
- capacity
- wind
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000004146 energy storage Methods 0.000 claims abstract description 63
- 230000004044 response Effects 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims description 3
- 238000011217 control strategy Methods 0.000 description 7
- 238000010248 power generation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002068 genetic effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
Images
Classifications
-
- 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
-
- H02J3/386—
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a capacity configuration method for primary frequency modulation of an auxiliary power grid of a wind storage system based on a series-parallel structure, which comprises the following steps of: (A) setting a hybrid operation mode for the energy storage system and the wind turbine generator set when responding to a frequency modulation instruction, wherein the hybrid operation mode of the wind storage system is as follows: dividing a frequency modulation task component issued by a power system into two parts, and performing frequency modulation response in a serial control mode and a parallel control mode respectively; (B) and (4) analyzing and setting the capacity requirement of the energy storage system by considering all constraint conditions in the actual operation of the energy storage system. According to the invention, the capacity of the energy storage system can be planned for the specific primary frequency modulation problem by establishing the hybrid operation model of the wind turbine generator and the energy storage system. The invention modularizes the traditional capacity configuration problem, is simple and easy to operate, can simplify the flow and has high operation speed. Meanwhile, the method is suitable for various scene conditions and has high universality.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a method for configuring primary frequency modulation control capacity of an auxiliary power grid of a wind storage system based on a series-parallel structure.
Background
Wind power generation converts kinetic energy of wind into electric energy. Wind is an energy source without public nuisance, the wind power generation is very environment-friendly, and the generated electric energy is very huge, so that more and more countries pay more attention to the wind power generation. However, wind power has characteristics of volatility, intermittence and the like, the characteristics of amplitude, frequency, distribution and the like of wind power output fluctuation are weakly related to the fluctuation trend of power grid load, the uncertainty brings challenges to power grid frequency modulation, and the capacity limitation of frequency modulation also restricts the capacity of the power grid for absorbing clean energy. The energy storage battery has the characteristics of quick response and high control precision, and under the background, certain necessity is provided for discussing that the energy storage battery participates in the frequency modulation of the power grid. The scientific and reasonable configuration of the energy storage capacity is an important link for energy storage application planning and is also a foundation for promoting the energy storage application planning to enter a frequency modulation market. In order to meet the requirement of the power system on frequency modulation, experts and scholars at home and abroad develop researches on the capacity requirement of the frequency modulation control mode of the wind and storage system.
In the prior art, the time constant of an optimal first-order low-pass filter is determined through the stabilizing effect of grid-connected output power, the power and capacity of an energy storage system are configured through the time constant, the output power energy storage is optimally configured by adopting a spectrum analysis method, but the time constant and the capacity are single-target optimization for stabilizing new energy fluctuation, and the service life and the cost factor of the energy storage system are not considered. In addition, considering randomness of new energy output, a hybrid energy storage capacity configuration method based on opportunity constraint planning is provided, a lowest cost is taken as a target, a genetic algorithm is adopted for solving, although cost constraint is added in the technology, the technology is still insufficient, and the provided methods can well solve new energy output fluctuation, but are limited to the source side, and user side load fluctuation and the like are not considered.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problems in the prior art, the invention provides a capacity configuration method for auxiliary primary frequency modulation of a wind storage system based on a parallel-serial structure, which considers the condition that a user side meets the fluctuation to realize the energy storage capacity requirement configuration.
The technical scheme is as follows: a capacity configuration method for auxiliary primary frequency modulation of a wind storage system based on a series-parallel structure comprises the following steps:
(A) setting a hybrid operation mode for the energy storage system and the wind turbine generator set when responding to a frequency modulation instruction, wherein the hybrid operation mode of the wind storage system is as follows: dividing a frequency modulation task component issued by a power system into two parts, and performing frequency modulation response in a serial control mode and a parallel control mode respectively, wherein the serial control mode is as follows: firstly, carrying out frequency modulation response by a wind power plant, and then responding to the frequency modulation component which cannot be responded by the wind turbine generator by the energy storage system; the parallel control mode refers to that the energy storage system and the wind power plant simultaneously respond to a frequency modulation task and output together;
(B) and (4) analyzing and setting the capacity requirement of the energy storage system by considering all constraint conditions in the actual operation of the energy storage system.
Preferably, in the step a: after the power system issues a frequency modulation instruction, when the conventional water-fire unit is ready to start, the proportion of the parallel control mode in the hybrid operation mode of the wind-storage combined system is larger than that of the serial control mode, so that the energy storage system responds to the power system frequency modulation instruction as much as possible, and the frequency drop is reduced; after the conventional water-fire unit is started, the occupation ratio of the serial control mode is changed to be larger than that of the parallel control mode.
Preferably, in the step a, the frequency modulation allocation occupation ratio K is obtained in a parallel control mode by a control variable method, and then the frequency modulation allocation occupation ratio is 1-K in a serial control mode.
Preferably, in a starting stage of a conventional unit, the frequency division allocation duty ratio K is adjusted to be 0.85 in the parallel control mode.
Preferably, the step B includes:
(1) initializing a time T-1;
(2) importing the output data P1 of the energy storage system at the moment;
(3) calculating the initial volume E by integration with timefThe energy storage rated capacity E is determined according to the discharge depth0While determining the storage rated power P1 in consideration of the storage efficiency0；
(4) Comparing the results E obtained from the present cycle0And P10Whether the current capacity is respectively larger than the historical maximum value or not, if so, the current result is replaced by the final rated capacity E and the final rated power P1, otherwise, the current result is not changed;
(5) and (4) repeating the steps (2) - (4) after the time T is equal to T +1 until the time T is equal to N, namely the final time N is reached, ending the process, and outputting the values of the final rated capacity E and the final rated power P1.
Has the advantages that: according to the invention, the capacity of the energy storage system can be planned for the specific primary frequency modulation problem by establishing the hybrid operation model of the wind turbine generator and the energy storage system. The method mainly solves the problem that the response time and the response speed of the conventional primary frequency modulation unit of the power system under high wind power permeability are difficult to meet the primary frequency modulation requirement, and utilizes the characteristic of short response time and high power density of the energy storage system to cooperate with the wind power unit to complete the primary frequency modulation task. Meanwhile, the method is suitable for various scene conditions and has high universality.
Drawings
FIG. 1 is a schematic diagram of a wind storage system hybrid control scheme according to the present invention;
fig. 2 is a flow chart of an energy storage system capacity configuration method according to the invention.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
The invention provides a capacity configuration method for auxiliary primary frequency modulation of a wind storage system based on a series-parallel structure, which comprises the following steps of:
After the power system issues the frequency modulation instruction, the specific sharing condition of the energy storage system and the wind power can be divided into a serial mode and a parallel mode when the energy storage system and the wind power respond to the frequency modulation instruction; the serial participation of the wind storage combined system in the frequency modulation of the power system refers to: the wind power plant firstly responds to the power system frequency modulation command, then the energy storage system responds to the frequency modulation component which cannot be responded by the wind turbine generator, and the wind and energy storage combined system is ensured to be capable of completing the power system frequency modulation task component to the maximum extent.
The parallel frequency modulation means that the energy storage system has the frequency modulation capability, so that the energy storage system can be regarded as an independent energy storage standby resource and a wind power plant to simultaneously receive a power grid frequency modulation command and share a power system frequency modulation task together, when the energy storage system and the wind power plant participate in the power system frequency modulation in parallel, the energy storage system and the wind power plant simultaneously respond to the power system frequency modulation task, and the energy storage system and the wind power plant jointly output power to complete the frequency modulation task.
However, the invention provides a hybrid operation control mode of the wind storage system in consideration of the cost of the energy storage system and the constraint of single serial and parallel frequency modulation effects. Under the hybrid control strategy, the wind energy storage system serial and parallel control mode proportion is calculated and controlled, after a power system issues a frequency modulation command, when a conventional water-fire unit is ready to start, the occupation ratio which needs to be controlled in parallel is larger, so that the energy storage system responds to the power system frequency modulation command as much as possible, the frequency drop is reduced, after the conventional water-fire unit is started, the control mode is changed into the mode with serial as the main, the energy storage action time is reduced, and the next frequency modulation action capacity of energy storage is reserved. The control scheme is shown in figure 1.
The frequency modulation distribution ratio of the series and parallel control mode in the hybrid control strategy of the wind storage combined system is an important parameter of the whole hybrid control strategy, so that the control variable method is adopted for solving. Through simulation calculation, the distribution ratio K of the parallel control mode is finally found to be converged to 0.85, and the frequency modulation effect of the wind power storage combined system which adopts a hybrid control strategy to participate in the primary frequency modulation of the power system is the best. The invention adopts a parallel control mode to adjust the frequency division allocation ratio K to 0.85.
And 2, analyzing the capacity requirement of the energy storage system.
Fig. 2 is a flow chart illustrating the capacity configuration of the energy storage system. Considering all constraint conditions in the actual operation of the energy storage system, carrying out capacity configuration on the energy storage system, wherein the specific configuration flow is as follows:
(1) initializing a time T-1;
(2) importing the energy storage output data P1 at the moment;
(3) integrating the output data P1, and calculating the initial capacity E by integrating with timefThe energy storage rated capacity E is determined according to the discharge depth0. At the same time, the rated energy storage power P1 is determined under the condition of considering the energy storage efficiency0；
Wherein E is0Is EfRounded upward to obtain P10Is the maximum value of the output data P1;
(4) comparing the results E obtained from the present cycle0And P10Whether the current capacity is respectively larger than the historical maximum value or not, if so, the current result is replaced by the final rated capacity E and the final rated power P1, otherwise, the current result is not changed;
(5) and (4) repeating the steps (2) - (4) after the time T is equal to T +1 until the time T is equal to N, namely the final time N is reached, ending the process, and outputting the values of the final rated capacity E and the final rated power P1.
In one embodiment, the actual frequency modulation is carried out on a power grid in a certain area with the load of 1000MW, the rated power of a wind power plant of 200MW and the load disturbance of 100MW (0.1P1. u). Under the same disturbance, the capacity configuration of the frequency modulation output condition of the energy storage system under the parallel, serial and mixed control strategies is counted, and the statistical condition is shown in table 1.
Table 1 energy storage capacity configuration results under different control strategies
| Control strategy | Rated power (MW) | Rated capacity (MWh) |
| Serial control | 4.65 | 0.59 |
| Parallel control | 6.74 | 1.032 |
| Hybrid control | 5.85 | 0.673 |
From the above data, it can be seen that the capacity configuration of the hybrid control mode is not the minimum, but the overall frequency modulation effect and the economy are the best when the hybrid control mode is adopted.
Claims (5)
1. A capacity configuration method for auxiliary primary frequency modulation of a wind storage system based on a series-parallel structure is characterized by comprising the following steps:
(A) setting a hybrid operation mode for the energy storage system and the wind turbine generator set when responding to a frequency modulation instruction, wherein the hybrid operation mode of the wind storage system is as follows: dividing a frequency modulation task component issued by a power system into two parts, and performing frequency modulation response in a serial control mode and a parallel control mode respectively, wherein the serial control mode is as follows: firstly, carrying out frequency modulation response by a wind power plant, and then responding to the frequency modulation component which cannot be responded by the wind turbine generator by the energy storage system; the parallel control mode refers to that the energy storage system and the wind power plant simultaneously respond to a frequency modulation task and output together; after the power system issues a frequency modulation instruction, when the conventional water-fire unit is ready to start, the proportion of a parallel control mode in a hybrid operation mode of the wind-storage combined system is larger than that of a serial control mode, so that the energy storage system responds to the power system frequency modulation instruction as much as possible, and the frequency drop is reduced; after the conventional water-fire unit is started, the occupation ratio of a serial control mode is changed to be larger than that of parallel control;
(B) and (4) analyzing and setting the capacity requirement of the energy storage system by considering all constraint conditions in the actual operation of the energy storage system.
2. The capacity allocation method for the auxiliary primary frequency modulation of the wind storage system based on the hybrid structure according to claim 1, wherein in the step a, a frequency modulation allocation ratio K is obtained in a parallel control mode by a control variable method, and then the frequency modulation allocation ratio is 1-K in a serial control mode.
3. The capacity allocation method for the auxiliary primary frequency modulation of the wind storage system based on the hybrid structure according to claim 2, wherein in a starting stage of a conventional water-fire unit, a frequency allocation ratio K value is 0.85 under the parallel control mode.
4. The capacity configuration method for the auxiliary primary frequency modulation of the wind storage system based on the hybrid structure according to claim 1, wherein the step B comprises:
(1) initializing a time T-1;
(2) importing the output data P1 of the energy storage system at the moment;
(3) calculating initial energy storage capacity E by integrating output P1 with timefThe energy storage rated capacity E is determined according to the discharge depth0While determining the storage rated power P1 in consideration of the storage efficiency0；
(4) Comparing the results E obtained from the present cycle0And P10Whether the current capacity is respectively larger than the historical maximum value or not, if so, the current result is replaced by the final rated capacity E and the final rated power P1, otherwise, the current result is not changed;
(5) and (4) repeating the steps (2) - (4) after the time T is equal to T +1 until the time T is equal to N, namely the final time N is reached, ending the process, and outputting the values of the final rated capacity E and the final rated power P1.
5. The capacity configuration method for the auxiliary primary frequency modulation of the wind storage system based on the hybrid structure according to claim 4, wherein the rated capacity E of the stored energy in the step 3 is0Is the initial capacity of energy storage EfRounded upwards to obtain the rated power P1 of stored energy0Is the maximum value of the output data P1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910584349.7A CN110336301B (en) | 2019-07-01 | 2019-07-01 | Wind storage system auxiliary power grid primary frequency modulation capacity configuration method based on series-parallel structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910584349.7A CN110336301B (en) | 2019-07-01 | 2019-07-01 | Wind storage system auxiliary power grid primary frequency modulation capacity configuration method based on series-parallel structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110336301A CN110336301A (en) | 2019-10-15 |
| CN110336301B true CN110336301B (en) | 2020-09-11 |
Family
ID=68143738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910584349.7A Expired - Fee Related CN110336301B (en) | 2019-07-01 | 2019-07-01 | Wind storage system auxiliary power grid primary frequency modulation capacity configuration method based on series-parallel structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110336301B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2387113C (en) * | 1999-09-13 | 2003-10-14 | Aloys Wobben | Method for controlling the reactive power and device for generating electrical energy in an electrical network |
| CN104600742B (en) * | 2014-12-25 | 2017-05-17 | 华中科技大学 | Method for compensating wind power plant virtual inertia by utilizing energy accumulation device |
| CN106374496B (en) * | 2016-09-14 | 2019-06-28 | 东北电力大学 | Double-fed fan motor unit-energy-storage system simulates synchronous machine frequency modulation characteristic control strategy |
| CN106228414A (en) * | 2016-09-14 | 2016-12-14 | 东北电力大学 | Energy-accumulating power station participates in the assistant service pricing method of power system frequency modulation |
-
2019
- 2019-07-01 CN CN201910584349.7A patent/CN110336301B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN110336301A (en) | 2019-10-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108667052B (en) | Multi-type energy storage system planning configuration method and system for virtual power plant optimized operation | |
| CN103793758B (en) | Multi-objective optimization scheduling method for electric vehicle charging station including photovoltaic power generation system | |
| CN105226688B (en) | Polymorphic type energy storage system capacity configuration optimizing method based on Chance-constrained Model | |
| CN111404206B (en) | Wind-solar energy storage power generation system capacity double-layer planning method considering investment return constraint | |
| CN105406518A (en) | AGC (Automatic Generation Control) method and system for making stored energy participate in secondary frequency modulation of power grid | |
| CN110797896A (en) | Hybrid energy storage capacity optimal configuration method in micro-grid wind and solar energy storage system | |
| CN113241803B (en) | Energy storage scheduling method based on new energy consumption and computer medium | |
| CN103986153B (en) | Within the scope of interconnection of bulk power grids, coordinate to carry out the optimization method of balance of electric power and ener | |
| CN107492901B (en) | Distributed energy storage system real-time optimization method and device | |
| CN111697578B (en) | Multi-target energy storage-containing regional power grid operation control method | |
| CN112053035B (en) | Power transmission channel and energy storage joint planning method considering economy and flexibility | |
| CN112928767A (en) | Distributed energy storage cooperative control method | |
| Jemaa et al. | Optimum sizing of hybrid PV/wind/battery system using Fuzzy-Adaptive Genetic Algorithm | |
| CN115114854A (en) | Two-stage self-organizing optimization aggregation method and system for distributed resources of virtual power plant | |
| Abdelhak et al. | Optimum sizing of hybrid PV/wind/battery using Fuzzy-Adaptive Genetic Algorithm in real and average battery service life | |
| CN113452078B (en) | AGC multi-target coordination optimization strategy based on new energy access and water, fire and electricity characteristics | |
| CN114243760A (en) | Photovoltaic energy storage coordination configuration method suitable for power distribution network | |
| Ghatak et al. | Optimization for Electric Vehicle Charging Station using Homer Grid | |
| CN110336301B (en) | Wind storage system auxiliary power grid primary frequency modulation capacity configuration method based on series-parallel structure | |
| CN114884101B (en) | Pumped storage dispatching method based on self-adaptive model control prediction | |
| CN111525597A (en) | Method for optimizing double-battery imbalance state in wind storage combined system | |
| CN114971154A (en) | Renewable energy consumption method comprising carbon transaction mechanism | |
| CN115642620A (en) | Double-layer optimization method for energy storage participation low-carbon flexible peak regulation | |
| CN111525596B (en) | Double-battery fluctuation out-of-limit optimization method in wind storage combined system | |
| CN113746120A (en) | Energy storage system optimal configuration method based on GA |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200911 Termination date: 20210701 |