CN117458537A - User side energy storage energy management system - Google Patents
User side energy storage energy management system Download PDFInfo
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- CN117458537A CN117458537A CN202311147956.XA CN202311147956A CN117458537A CN 117458537 A CN117458537 A CN 117458537A CN 202311147956 A CN202311147956 A CN 202311147956A CN 117458537 A CN117458537 A CN 117458537A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 135
- 230000008901 benefit Effects 0.000 claims abstract description 27
- 238000007599 discharging Methods 0.000 claims abstract description 21
- 238000004364 calculation method Methods 0.000 claims abstract description 12
- 230000008859 change Effects 0.000 claims abstract description 5
- 230000009467 reduction Effects 0.000 claims abstract description 4
- 238000007726 management method Methods 0.000 claims description 40
- 230000005611 electricity Effects 0.000 claims description 18
- 238000011217 control strategy Methods 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 4
- 238000010248 power generation Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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Classifications
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
-
- 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
- H02J3/008—Circuit arrangements for ac mains or ac distribution networks involving trading of energy or energy transmission rights
-
- 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
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention relates to a user side energy storage energy management system, which comprises an energy storage energy management system, an intelligent gateway, a power grid, a photovoltaic unit, an energy storage unit and a load unit, wherein the power grid, the photovoltaic unit, the energy storage unit and the load unit are respectively connected with the intelligent gateway; the energy storage energy management system calculates a charge and discharge gain difference value of the current day; the energy storage energy management system acquires the maximum demand value P1 and the time point T3 of the current month, judges whether the demand value is related to energy storage charging or discharging according to the time period of the demand value, and subtracts the cost of the demand increase caused by energy storage charging from the income of the current month if the demand value is caused by energy storage charging power superimposed load power; if the demand value is caused by energy storage discharge, the benefit of the current month of energy storage needs to be increased by the cost of the reduction of the demand caused by the energy storage discharge; the sum of the current month Gu Taoli benefit and the change demand cost difference is taken as the current month benefit of energy storage. Compared with the prior art, the method has the advantages of comprehensive calculation, high accuracy and the like.
Description
Technical Field
The invention relates to the technical field of energy storage energy management, in particular to a user side energy storage energy management system.
Background
With the development of energy storage technology and the support of policies, traditional power systems have gradually shifted to new power systems mainly generating electricity from new energy sources. Particularly on the user side, distributed photovoltaic and energy storage systems are deployed on a large scale to reduce carbon emissions and electricity costs of enterprise electricity. However, since such heavy assets as energy storage are mainly borne by enterprises, the enterprises can know the post-return and recovery period of the energy storage more clearly, and the factors of concern are whether the users invest in the energy storage or not.
The invention discloses a photovoltaic absorption and peak valley arbitrage optical storage system and a control method thereof through searching Chinese patent publication No. CN116544982A, and particularly discloses the optical storage system which comprises an energy management system, and a photovoltaic power generation unit, an energy storage system, a load unit and a smart meter which are respectively connected with the energy management system, wherein the energy storage system consists of at least one energy storage unit; the energy management system firstly acquires the operation information of the photovoltaic power generation unit and each energy storage unit, and secondly, performs coordination control on each energy storage unit according to a preset peak-average-valley period under the reporting of the required power by analyzing the difference value between the current power consumption and the reporting of the required power in real time and combining the time-of-use power price period, the photovoltaic power generation power and the current state of the energy storage unit; the energy storage unit realizes energy absorption and release according to a scheduling instruction of the energy management system.
However, the existing energy storage income calculation method only pays attention to the income of the peak Gu Tao, and often ignores the problem of increased demand cost caused by the introduction of energy storage charging, so that the income and recovery period after the operation of energy storage are not expected. Therefore, how to calculate the energy storage benefits more comprehensively and accurately becomes a technical problem to be solved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the user side energy storage energy management system with comprehensive calculation and high accuracy.
The aim of the invention can be achieved by the following technical scheme:
according to one aspect of the present invention, there is provided a user-side stored energy management system including a stored energy management system, an intelligent gateway, and a power grid, a photovoltaic unit, an energy storage unit, and a load unit respectively connected to the intelligent gateway;
the energy storage energy management system acquires operation information of an energy storage unit, and calculates a charge and discharge gain difference value F0 of the current day by combining a time-of-use electricity price period and a time-of-use electricity price;
the energy storage energy management system acquires a maximum demand value P1 and a time point T3 of the current month, judges whether the demand value is related to energy storage charging or discharging according to a time period of the demand value, and subtracts the cost F1 of the demand increase caused by energy storage charging from the income demand of the current month if the demand value is caused by energy storage charging power superimposed load power; if the demand value is caused by energy storage discharge, the benefit of the current month of energy storage needs to be increased by the cost F2 of the reduction of the demand caused by the energy storage discharge; the sum of the current month Gu Taoli benefit and the change demand cost difference is taken as the stored energy current month benefit F.
As an optimized technical scheme, the energy storage energy management system is used for acquiring electric quantity metering data of a photovoltaic loop, a mains supply inlet loop, a load loop and an energy storage loop, supporting a monitoring function of an energy storage unit, having peak clipping and valley filling, a planning curve, demand control, a standby power supply and a control strategy for preventing backflow, and supporting operation state analysis, statistics and income calculation of the energy storage system.
As an preferable technical scheme, a first intelligent ammeter is arranged in the power grid loop, and the first intelligent ammeter is used for metering the maximum demand value P1 and the time point T3 of the current month and uploading the maximum demand value P1 and the time point T3 to the energy storage energy management system through an intelligent gateway.
As an optimal technical scheme, a second intelligent ammeter is arranged in the photovoltaic unit loop.
As an preferable technical scheme, a third intelligent ammeter is arranged in the energy storage unit loop, measures the charging amount E1 and the discharging amount E2 of the current day, records the charging period T1 and the discharging period T2, and uploads the charging period T1 and the discharging period T2 to the energy storage energy management system through an intelligent gateway.
As an optimal technical scheme, a fourth intelligent ammeter is arranged in the load unit loop.
As an preferable technical scheme, the energy storage unit performs charging and discharging actions according to instructions of the energy storage energy management system.
As a preferable technical solution, the charging and discharging gain difference F0 on the same day is calculated as follows:
F 0 ＝E 2 ×P dis_pri -E 1 ×P cha_pri
wherein P is dis_pri Indicating the discharge price, P cha_pri Indicating the charge price.
As a preferable technical scheme, the determining whether the demand value is related to energy storage charging or discharging is: by comparing whether the time point T3 at which the maximum demand value P1 of the current month is located is within the daily charging period T1.
As a preferred technical solution, whether the time point T3 at which the maximum demand value P1 of the current month is located is within the daily charging period T1 is specifically:
if T3 is within the daily charging period T1, the maximum demand value P2 of the non-charging period content is obtained, and the charge F1 for increasing the demand is calculated as follows:
F 1 ＝(P 1 -P 2 )×K
wherein K is the electricity price of the electricity charge;
the current month benefit of the energy storage system is that:
F＝F 0 ×D-F 1
wherein D is the number of days of energy storage operation in the current month;
if T3 is not within the daily charging period T1, determining whether T3 is within the daily discharging period T2, if yes, obtaining the discharging power P3 stored in this period, and calculating the cost F2 with reduced demand as follows:
F 2 ＝P 3 ×K
the current month benefit of the energy storage system is that:
F＝F 0 ×D+F 2
wherein D is the number of days of energy storage operation in the current month;
if T3 is not in the period of charging or discharging the energy storage, the charge and discharge of the energy storage have no relation to the demand cost of the user, and the current month of the energy storage has only peak valley set benefit, namely f=f 0 。
Compared with the prior art, the invention has the following advantages:
1) According to the invention, different control strategies are realized through the energy storage energy management system so as to adapt to different requirements of users, and the safety, reliability, economy and conservation of electricity consumption of the users are ensured;
2) According to the invention, the effectiveness of profit calculation is ensured for a peak Gu Taoli accurate data source through charge and discharge metering under different time periods;
3) According to the invention, the reason of the change of the demand cost is clarified by introducing the positioning of the demand value, so that more accurate measurement is provided for the calculation of the energy storage income.
Drawings
FIG. 1 is a schematic diagram of an energy storage system according to the present invention;
FIG. 2 is a flow chart of the calculation process of the present invention;
the reference numerals in fig. 1 indicate:
1-energy storage EMS, 2-intelligent gateway, U1-power grid, U2-photovoltaic unit, U3-energy storage unit, U4-load unit, S1-power grid incoming line breaker, S2-photovoltaic loop breaker, S3-energy storage loop breaker, S4-load loop breaker, S41-non-adjustable load loop breaker, S42-adjustable load loop breaker, M1-first smart meter, M2-second smart meter, M3-third smart meter, M4-fourth smart meter.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
As shown in fig. 1, a schematic diagram of an embodiment of a customer side energy storage energy management system of the present invention is provided, the system includes an energy storage energy management system 1, an intelligent gateway 2, and a power grid U1, a photovoltaic unit U2, an energy storage unit U3, a load unit U4, and intelligent electric meters in each unit loop, which are respectively connected with the intelligent gateway 2, wherein the intelligent electric meters are respectively a first intelligent electric meter M1, a second intelligent electric meter M2, a third intelligent electric meter M3, and a fourth intelligent electric meter M4, the first intelligent electric meter M1 is a line-in loop bidirectional meter, the second intelligent electric meter M2 is a photovoltaic loop meter, the third intelligent electric meter M3 is an energy storage loop bidirectional meter, and the fourth intelligent electric meter M4 is a load loop meter;
the power grid U1 loop is provided with a first intelligent electric meter M1, and the first intelligent electric meter M1 is connected with the energy storage energy management system 1 through an intelligent gateway 2. The power grid U1 is connected with the first intelligent ammeter M1 through a first switch S1.
The photovoltaic unit U2 loop is provided with a second intelligent ammeter M2, and the second intelligent ammeter M2 is connected with the energy storage energy management system 1 through the intelligent gateway 2. The second smart meter M2 is connected to the first smart meter M1 through a second switch S2.
And a third intelligent ammeter M3 is arranged in the loop of the energy storage unit U3, and the third intelligent ammeter M3 is connected with the energy storage energy management system 1 through the intelligent gateway 2. The energy storage unit U3 comprises an energy storage converter, an energy storage battery and a BMS, wherein the energy storage battery is connected with the energy storage converter and the BMS respectively, the energy storage converter is connected with a third intelligent ammeter M3, and the energy storage converter and the BMS are connected with the intelligent gateway 2 respectively. The third smart meter M3 is connected to the first smart meter M1 through a third switch S3.
The load unit U4 loop is provided with a fourth intelligent electric meter M4, the fourth intelligent electric meter M4 is connected with the energy storage energy management system 1 through the intelligent gateway 2, and the fourth intelligent electric meter M4 is connected with the first intelligent electric meter M1 through a fourth switch S4. The load unit U4 includes an unadjustable load and an adjustable load, the unadjustable load is connected with the fourth smart meter M4 through the fifth switch S41, and the adjustable load is connected with the fourth smart meter M4 through the sixth switch S42.
The invention can open the corresponding switch according to the need through the energy storage energy management system to realize the collection of various data volumes so as to adapt to different demands of users and ensure the safety, reliability, economy and saving of electricity of the users. The intelligent ammeter is adopted to realize data acquisition, so that the efficiency and accuracy of data acquisition are greatly improved; the energy storage EMS realizes data acquisition and transmission through the intelligent gateway, and the high efficiency of the whole system is greatly improved.
The energy management system 1 of the invention firstly obtains the operation information of the energy storage unit U3, and obtains the charging period T1, the discharging period T2, the charging amount E1 and the discharging amount E2 of the current day through the third intelligent ammeter M3, and calculates the charging and discharging income difference F0 of the current day by combining the time-sharing electricity price period and the time-sharing electricity price. The method comprises the steps that a first intelligent ammeter M1 is used for obtaining a maximum demand value P1 and a time point T3 of a current month, judging whether the demand value is related to energy storage charging or discharging according to a time period of the demand value, and subtracting a cost F1 for increasing the demand caused by energy storage charging from a benefit of the current month of energy storage if the demand value is caused by energy storage charging power superimposed load power; if the demand value is caused by energy storage discharge, the benefit of the energy storage in the current month needs to be increased by the cost F2 of the demand reduction caused by the energy storage discharge; finally, the sum of the current month Gu Taoli benefit and the change demand cost difference is taken as the energy storage current month benefit F.
The energy storage income calculation steps are as follows:
step S1, the energy storage energy management system 1 sets control strategies such as peak clipping and valley filling, planning curves, demand control, standby power supply, backflow prevention and the like according to the demands of users, collects electric quantity metering data of a photovoltaic loop, a mains supply inlet loop, a load loop and an energy storage loop, and analyzes and counts the running state of the energy storage system.
In step S2, the third smart meter M3 measures the charge amount E1 and the discharge amount E2 on the current day, and records the charge period T1 and the discharge period T2.
In step S3, the first smart meter M1 can measure the maximum demand value P1 and the time point T3 of the current month.
Step S4, calculating the charge and discharge quantity benefit F0 on the same day, wherein the calculation mode is as follows:
F 0 ＝E 2 ×P dis_pri -E 1 ×P cha_pri
wherein P is dis_pri Indicating the discharge price, P cha_pri Indicating the charge price.
Step S5, whether the demand value is related to the stored energy charge and discharge is judged by comparing whether the time point T3 of the maximum demand value P1 in the current month is within the daily charge period T1. If so, and during the charging period, entering S6; if so, and during the discharge period, proceeding to S7; if not, entering S8;
step S6, obtaining the maximum demand value P2 of the non-charging time period content, and then obtaining the charge F1 with increased demand, wherein the calculation mode is as follows:
F 1 ＝(P 1 -P 2 )×K
wherein K is the electricity price of the electricity charge.
The current month benefit of the energy storage system is calculated as follows:
F＝F 0 ×D-F 1
wherein D is the number of days of the current month of energy storage operation.
Step S7, obtaining the discharge power P3 of the stored energy in the period, and then obtaining the cost F2 with reduced demand, wherein the calculation mode is as follows:
F 2 ＝P 3 ×K
the current month benefit of the energy storage system is that:
F＝F 0 ×D+F 2
wherein D is the number of days of the current month of energy storage operation.
Step S8, the charge and discharge of the stored energy have no relation to the demand cost of the user, and the current month of the stored energy has only peak valley set benefit, namely F=F 0 。
According to the invention, the energy storage income of the current day is calculated by acquiring the charge and discharge time period and the charge amount, and whether the charge amount cost caused by the energy storage charge and discharge action is increased or decreased is judged according to the time point of the charge amount value, so that the energy storage income is calculated by a more clear enterprise user.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (10)
1. The system is characterized by comprising an energy storage energy management system (1), an intelligent gateway (2), and a power grid (U1), a photovoltaic unit (U2), an energy storage unit (U3) and a load unit (U4) which are respectively connected with the intelligent gateway (2);
the energy storage energy management system (1) acquires operation information of the energy storage unit (U3), and calculates a charge and discharge gain difference value F0 of the current day by combining a time-of-use electricity price period and a time-of-use electricity price;
the energy storage energy management system (1) acquires a maximum demand value P1 and a time point T3 of the current month, judges whether the demand value is related to energy storage charging or discharging according to a time period of the demand value, and subtracts the cost F1 of the demand increase caused by energy storage charging from the income of the current month if the demand value is caused by energy storage charging power superimposed load power; if the demand value is caused by energy storage discharge, the benefit of the current month of energy storage needs to be increased by the cost F2 of the reduction of the demand caused by the energy storage discharge; the sum of the current month Gu Taoli benefit and the change demand cost difference is taken as the stored energy current month benefit F.
2. The system according to claim 1, wherein the energy storage energy management system (1) is configured to support a monitoring function of the energy storage unit (U3) according to the collected electricity metering data of the photovoltaic loop, the mains supply line loop, the load loop and the energy storage loop, and to support an operation state analysis, statistics and profit calculation of the energy storage system, and to provide a peak clipping and valley filling, a planning curve, a demand control, a standby power supply and a control strategy for preventing reverse flow.
3. A customer side energy storage management system according to claim 1, characterized in that a first smart meter (M1) is arranged in the grid (U1) loop, the first smart meter (M1) is used for metering the maximum demand value P1 of the current month and the time point T3, and uploading the maximum demand value P1 to the energy storage management system (1) through the smart gateway (2).
4. A customer-side stored energy management system according to claim 1, wherein a second smart meter (M2) is provided in the photovoltaic unit (U2) loop.
5. A customer side energy storage management system according to claim 1, characterized in that a third smart meter (M3) is arranged in the loop of the energy storage unit (U3), the third smart meter (M3) meters the current day's charge E1 and discharge E2, records the charge period T1 and discharge period T2, and uploads to the energy storage management system (1) via the smart gateway (2).
6. A customer side stored energy management system according to claim 1, wherein a fourth smart meter (M4) is provided in the load unit (U4) loop.
7. The user-side stored energy management system according to claim 1, wherein the energy storage unit (U3) performs a charging and discharging operation according to an instruction of the stored energy management system (1).
8. The customer premise energy storage energy management system of claim 5 wherein the current day charge-discharge benefit difference F0 is calculated as follows:
F 0 ＝E 2 ×P dis_pri -E 1 ×P cha_pri
wherein P is dis_pri Indicating the discharge price, P cha_pri Indicating the charge price.
9. The customer premise energy storage energy management system of claim 1 wherein the determining whether the demand value relates to stored energy charging or discharging is: by comparing whether the time point T3 at which the maximum demand value P1 of the current month is located is within the daily charging period T1.
10. The system of claim 9, wherein the comparison of whether the time point T3 at which the maximum demand value P1 of the current month is located is within the daily charging period T1 is specifically:
if T3 is within the daily charging period T1, the maximum demand value P2 of the non-charging period content is obtained, and the charge F1 for increasing the demand is calculated as follows:
F 1 ＝(P 1 -P 2 )×K
wherein K is the electricity price of the electricity charge;
the current month benefit of the energy storage system is that:
F＝F 0 ×D-F 1
wherein D is the number of days of energy storage operation in the current month;
if T3 is not within the daily charging period T1, determining whether T3 is within the daily discharging period T2, if yes, obtaining the discharging power P3 stored in this period, and calculating the cost F2 with reduced demand as follows:
F 2 ＝P 3 ×K
the current month benefit of the energy storage system is that:
F＝F 0 ×D+F 2
wherein D is the number of days of energy storage operation in the current month;
if T3 is not in the period of charging or discharging the energy storage, the charge and discharge of the energy storage have no relation to the demand cost of the user, and the current month of the energy storage has only peak valley set benefit, namely f=f 0 。
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311147956.XA CN117458537A (en) | 2023-09-06 | 2023-09-06 | User side energy storage energy management system |
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| CN202311147956.XA CN117458537A (en) | 2023-09-06 | 2023-09-06 | User side energy storage energy management system |
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