CN114825471A - Automatic coordination control method and system for light storage charging and discharging micro-grid system - Google Patents
Automatic coordination control method and system for light storage charging and discharging micro-grid system Download PDFInfo
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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
- H02J3/381—Dispersed generators
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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
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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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
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
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Abstract
The invention discloses an automatic coordination control method and system for a light storage charging and discharging micro-grid system, which are characterized in that real-time load of a transformer of the micro-grid system and real-time power generation power of a photovoltaic system are collected; when the real-time load of the transformer is smaller than or equal to the limit value of the working low load and the real-time power generation power of the photovoltaic system is larger than the calibrated power generation state judgment power of the photovoltaic system, controlling an energy storage system of the micro-grid system to start charging to perform energy absorption of the photovoltaic system; when the real-time load is in a working load interval, controlling the micro-grid system to enter a peak clipping and valley filling working mode in a valley peak period; and when the real-time load is greater than or equal to the working high load limit value, controlling the micro-grid system to automatically enter a power distribution expansion mode. The photovoltaic consumption, the time-interval peak clipping and valley filling and the power distribution and capacity expansion of the light storage charging and discharging micro-grid system are organically integrated, so that the operation coordination and the photovoltaic consumption of the photovoltaic system and the energy storage system are more accurate, timely and efficient.
Description
Technical Field
The invention relates to the field of power microgrid systems, in particular to an automatic coordination control method and system for a light storage charging and discharging microgrid system.
Background
With the rise of national electric power structure adjustment and new energy, electric vehicles, distributed photovoltaic power generation and lithium battery energy storage can be greatly developed, and a micro-grid system consisting of loads such as photovoltaic power generation, an energy storage system, a direct current charging pile and building illumination is in the same place. The existing micro-grid system is mainly monitored and scheduled and managed by an energy management system (EMS system), the energy scheduling and management have various forms, a photovoltaic power generation grid-connected mode mainly comprises three operation modes of a self-power-consumption residual power grid-connected mode, a full-power-consumption grid-connected mode and a full-power-consumption mode, a part of photovoltaic power generation systems belong to the full-power-consumption operation mode, reverse power transmission to a power grid is forbidden, and when the load in the micro-grid system is small, the photovoltaic systems need to be closed, so that the energy waste is caused. The energy storage system mainly sets charging and discharging power in each period of 24 hours every day according to the peak-valley period of a power grid and a daily load curve in the micro-grid system, charges in the valley period and discharges in the peak period, and mainly works in a peak clipping and valley filling automatic operation mode.
Present light storage fills and fills little grid system, and mode is single, and the operation coordination work fusion degree between photovoltaic system and the energy storage system is not high, and it is more extensive to photovoltaic power generation system's energy consumption mode, has the energy of certain degree extravagant, and photovoltaic power generation system work efficiency has certain promotion space.
Disclosure of Invention
The invention provides an automatic coordination control method and system for a light storage charging and discharging micro-grid system, which are used for solving the technical problems of low working efficiency and serious energy waste caused by low fusion degree of operation coordination work between the existing photovoltaic system and an energy storage system.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
an automatic coordination control method for a light storage charging and discharging micro-grid system comprises the following steps:
collecting real-time load of a transformer of a micro-grid system and real-time power generation power of a photovoltaic system;
calibrating a working low-load limit value, a working high-load limit value and a working load interval of a transformer of the micro-grid system, wherein the lower limit of the working load interval is the sum of the working low-load limit value and a return difference value thereof, and the upper limit of the working load interval is the difference between the working high-load limit value and the return difference value thereof;
and comparing the real-time load of the transformer of the microgrid system with the working low-load limit value, the working high-load limit value and the working load interval respectively:
when the real-time load is smaller than or equal to the working low-load limit value, comparing the real-time power generation power of the photovoltaic system with the calibrated power generation state judgment power of the photovoltaic system, and when the real-time power generation power of the photovoltaic system is larger than the calibrated power generation state judgment power of the photovoltaic system, controlling an energy storage system of the micro-grid system to start charging to perform energy consumption of the photovoltaic system;
when the real-time load is in the working load interval, controlling the micro-grid system to enter a peak clipping and valley filling working mode in a valley peak period;
and when the real-time load is greater than or equal to the working high load limit value, controlling the micro-grid system to automatically enter a power distribution expansion mode.
Preferably, the control of the energy storage system of the microgrid system to start charging for energy consumption of the photovoltaic system comprises:
adjusting the charging and discharging set power P (CNST) of the energy storage system to photovoltaic absorption set power P (XNST), wherein the photovoltaic absorption set power P (XNST) is obtained by the following formula:
P(XNST)=P(t)-P(L)；
wherein, p (t) is the real-time load of the transformer; p (l) is the operating low load limit.
Preferably, the method comprises the following steps:
and when the real-time load is less than or equal to the working low-load limit value and the real-time power generation power of the photovoltaic system is less than the power generation state judgment power, controlling the energy storage system to stand by, and adjusting the charge and discharge set power P (CNST) of the energy storage system to 0 KW.
Preferably, the method comprises the following steps:
when the real-time load is less than or equal to the working low-load limit value, the real-time generating power of the photovoltaic system is greater than or equal to the generating state judgment power, and the energy storage system is in a charging state, the output power of the photovoltaic system is limited, and the generating set power P (GFST) of the photovoltaic system is adjusted according to the following formula:
P(GFST)=P(GF)-(P(L)-P(t))；
wherein, p (gf) is the real-time power generation power of the photovoltaic system, p (l) is the working low-load limit value, and p (t) is the real-time load of the transformer.
Preferably, the method comprises the following steps:
when the real-time load is greater than or equal to the lower limit of the working load interval, adjusting the power generation set power P (GFST) of the photovoltaic system to the rated power P (GFed) of the photovoltaic system.
Preferably, the controlling the microgrid system to enter a peak clipping and valley filling working mode in a valley peak period includes:
determining the time interval of the system clock TM (EMS):
when a system clock TM (EMS) is in an interval between a power valley period starting time TM (US1) and a valley period ending time TM (UZ1), adjusting charging and discharging set power P (CNST) of the energy storage system to valley period charging power P (UCST1), and starting charging the energy storage system;
when a system clock TM (EMS) is in an interval between a power peak period starting time TM (GS1) and a peak period ending time TM (GZ1), adjusting charging and discharging set power P (CNST) of the energy storage system to peak period discharging power P (GFST1), and starting discharging the energy storage system;
when the system clock TM (ems) is within the interval between the power spike period start time TM (JS1) and the spike period end time TM (JZ1), the energy storage system charge and discharge setting power P (cnst) is adjusted to the spike period discharge power P (JFST1), and the energy storage system starts to discharge.
Preferably, control microgrid system and automatically enter distribution dilatation mode, include:
adjusting the charging and discharging set power P (CNST) of the energy storage system to the capacity expansion mode discharging power P (KRST), wherein the capacity expansion mode discharging power P (KRST) is obtained by the following formula:
P(KRST)=P(t)-P(H)；
wherein, P (t) is the real-time load of the transformer; p (H) is the work high load limit.
A computer system comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method when executing the computer program.
The invention has the following beneficial effects:
1. according to the automatic coordination control method and system for the light storage charging and discharging micro-grid system, three working modes of photovoltaic consumption, time-interval peak clipping and valley filling and power distribution and expansion of the light storage charging and discharging micro-grid system are organically combined and automatically switched according to the current power distribution load, the photovoltaic power generation power, the residual electric quantity of the energy storage system, the peak-valley period and other factors in the micro-grid system, so that the operation coordination of the photovoltaic system and the energy storage system and the photovoltaic consumption are more accurate, timely and efficient, the peak-valley clipping and the peak-valley filling of the power in the peak-valley period are considered, the capacity pressure of a transformer of a power distribution network is relieved, and the overload frequency of the transformer is reduced.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a light storage charging and discharging micro-grid system according to an embodiment of the present invention;
fig. 2 is a flowchart of an automatic coordination control method for a light storage charging and discharging micro-grid system according to an embodiment of the present invention.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
The first embodiment is as follows:
the implementation discloses an automatic coordination control method for a light storage charging and discharging micro-grid system, which comprises the following steps:
collecting real-time load of a transformer of a micro-grid system and real-time power generation power of a photovoltaic system;
calibrating a working low-load limit value, a working high-load limit value and a working load interval of a transformer of the micro-grid system, wherein the lower limit of the working load interval is the sum of the working low-load limit value and a return difference value thereof, and the upper limit of the working load interval is the difference between the working high-load limit value and the return difference value thereof;
and comparing the real-time load of the micro-grid system transformer with the working low-load limit value, the working high-load limit value and the working load interval respectively:
when the real-time load is smaller than or equal to the working low-load limit value, comparing the real-time power generation power of the photovoltaic system with the calibrated power generation state judgment power of the photovoltaic system, and when the real-time power generation power of the photovoltaic system is larger than the calibrated power generation state judgment power of the photovoltaic system, controlling an energy storage system of the micro-grid system to start charging to perform energy consumption of the photovoltaic system;
when the real-time load is in the working load interval, controlling the micro-grid system to enter a peak clipping and valley filling working mode in a valley peak period;
and when the real-time load is greater than or equal to the working high load limit value, controlling the micro-grid system to automatically enter a power distribution expansion mode.
In addition, in the embodiment, a computer system is also disclosed, which includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and when the processor executes the computer program, the steps of the method are implemented.
According to the invention, according to the factors of the current distribution load, the photovoltaic power generation power, the residual electric quantity of the energy storage system, the peak-valley period and the like in the micro-grid system, three working modes of photovoltaic consumption, time-period peak clipping and valley filling and power distribution and expansion of the light storage charging and discharging micro-grid system are organically combined, and automatic switching of the working modes is realized, so that the operation coordination of the photovoltaic system and the energy storage system and the photovoltaic consumption are more accurate, timely and efficient, the peak-valley clipping and valley filling of the power in the peak-valley period are considered, the capacity pressure of the transformer of the power distribution network is relieved, and the overload frequency of the transformer is reduced.
Example two:
the second embodiment is the preferred embodiment of the first embodiment, and is different from the first embodiment in that specific steps of the automatic coordination control method for the optical storage charging and discharging microgrid system are introduced:
as shown in fig. 2, in this embodiment, an automatic coordination control method for a light storage, charging and discharging microgrid system is disclosed, which is applied to the light storage, charging and discharging microgrid system shown in fig. 1, and includes the following steps:
step 1: setting a working low-load limit value P (L) and a return difference value P (LHC) of a distribution transformer in a microgrid system, a working high-load limit value P (H) and a return difference value P (HHC) of the transformer, judging power P (GFMK) of a photovoltaic system generating state, and configuring parameters of a peak-valley period of power, a valley period starting time TM (US1), an ending time TM (UZ1) and charging power P (UCST 1); peak period start time TM (GS1), end time TM (GZ1), discharge power P (GFST 1); spike period start time TM (JS1), end time TM (JZ1), discharge power P (JFST 1).
Step 2: detecting transformer load data P (t), photovoltaic power generation power P (GF), an energy storage system charging state, an energy storage system discharging state, an energy storage system charging permission state, an energy storage system discharging permission state and a micro-grid energy management system clock TM (EMS).
And step 3: the system is started initially, the charging and discharging set power P (CNST) =0KW of the energy storage system runs in a standby state, the power generation set power P (GFST) = the rated power P (GFed) of the photovoltaic system is generated by the photovoltaic system, and full power generation is preset.
And 4, step 4: after the action of the step 3 is executed, delaying for 5 seconds, starting a judgment process of the section where the transformer load is located:
judging that the transformer load P (t) is less than or equal to a transformer working low-load limit value P (L):
if the load P (t) of the transformer is less than or equal to the working low-load limit value P (L) of the transformer, the micro-grid system is in a working condition of small load or sufficient power generation power of the photovoltaic system;
when the micro-grid system is in a working condition of small load or sufficient photovoltaic system power generation power, judging the actual power generation power P (GF) of the photovoltaic system and the judgment power P (GFMK) of the photovoltaic system power generation state:
if the actual generating power P (GF) of the photovoltaic system is less than the generating state judging power P (GFMK) of the photovoltaic system, the stored energy is in a discharging state, the situation that the microgrid system reversely transmits power to a power grid due to fluctuation of a load at the moment is prevented, the energy storage system is in a standby state, and the charging and discharging set power P (CNST) =0KW of the energy storage system is avoided;
if the actual generating power P (GF) of the photovoltaic system is not less than the generating state judging power P (GFMK) of the photovoltaic system, the stored energy is in a charging state, the situation that the microgrid system reversely transmits power to the power grid due to the fluctuation of the load at the moment is prevented, and the photovoltaic output power is limited, wherein the generating set power P (GFST) = [ P (GF)) - (P (L)) -P (t)) ]ofthe photovoltaic system;
if the actual generating power P (GF) of the photovoltaic system is greater than the generating state judging power P (GFMK) of the photovoltaic system, the stored energy is not in a charging state, the stored energy system starts charging to consume the energy of the photovoltaic system, the charging and discharging set power P (CNST) = photovoltaic consumption set power P (XNST), P (XNST) = P (t) (P (L)), and the charging and discharging set power P (CNST) of the stored energy system, wherein a negative value is the system charging, and a positive value is the system discharging.
And 5: if the load of the transformer is P (t) is not less than P (L) + P (LHC), if the photovoltaic output power is limited at the moment, the power output limit is removed, and P (GFST) = the rated power P (GFed) of the photovoltaic system; and (4) after the photovoltaic system runs at full scale, if the current load P (t) of the transformer is reduced and the condition of the step (4) is met, returning to the working state of the step (4).
Step 6: if the load of the transformer is P (L) + P (LHC) is less than or equal to P (t) is less than or equal to P (H) -P (HHC), the micro-grid system enters a peak clipping and valley filling working mode according to a valley period. If the system clock TM (ems) is in the interval between the power valley period start time TM (US1) and the valley period end time TM (UZ1), the energy storage system charging and discharging set power P (cnst) = valley period charging power P (UCST1), and the energy storage system starts to charge; if the system clock TM (ems) is in the interval between the power peak period starting time TM (GS1) and the peak period ending time TM (GZ1), the energy storage system charge-discharge set power P (cnst) = peak period discharge power P (GFST1), and the energy storage system starts to discharge; if the system clock TM (ems) is in the interval between the power spike period start time TM (JS1) and the spike period end time TM (JZ1), the energy storage system charge and discharge setting power P (cnst) = spike period discharge power P (JFST1), and the energy storage system starts to discharge; if the transformer load P (t) has large fluctuation, the step 4 or the step 7 is carried out according to the situation.
And 7: if the transformer load P (t) is not less than P (H), the transformer load is too heavy, the microgrid system automatically enters an expansion mode, if the energy storage system is allowed to discharge, the energy storage system discharges, the charging and discharging set power P (CNST) = expansion mode discharge power P (KRST), P (KRST) = P (t) -P (H), and if the transformer load P (t) has large fluctuation in the period, the method enters the step 4 or the step 6 according to the situation.
And 8: in the operation process of the system, if the charge permission or discharge permission condition of the energy storage system is not met, the system prohibits charging or discharging, and the energy storage system enters a standby state.
Example three:
the invention provides an automatic coordination control method for a light storage charging and discharging micro-grid system, which comprises the following steps:
step 1: and setting internal parameters of the microgrid system. Distribution transformer operating low load limit value p (l) =20KW return difference value p (lhc) =10 KW; a working high load limit value P (H) =600KW of the transformer, and a return difference value P (HHC) =20 KW; the photovoltaic system power generation state judgment power P (GFMK) =5 KW; configuring parameters of a peak-valley period of electric power, wherein the starting time TM (US1) of the valley period is 0 hour and 0 minute, the ending time TM (UZ1) is 7 hours and 59 minutes, and the charging power P (UCST1) = -40 KW; a peak period start time TM (GS1) of 8 hours and 0 minutes, an end time TM (GZ1) of 18 hours and 59 minutes, and a discharge power P (GFST1) =30 KW; the spike period start time TM (JS1) is 19 hours and 0 minutes, the end time TM (JZ1) is 23 hours and 59 minutes, and the discharge power P (JFST1) =20 KW.
Step 2: the micro-grid energy management system detects transformer load data P (t), photovoltaic power generation power P (GF), an energy storage system charging state, an energy storage system discharging state, an energy storage system charging allowable state, an energy storage system discharging allowable state and a micro-grid energy management system clock TM (EMS) in real time.
And step 3: the system is started initially, the charging and discharging set power P (CNST) =0KW of the energy storage system is operated in a standby state, the power generation set power P (GFST) = photovoltaic system rated power P (GFed) =125KW of the photovoltaic system is generated, and full power generation is performed.
And 4, step 4: and (3) after the action is executed, delaying for 5 seconds, and starting a judgment process of the section where the transformer load is located. The current load P (t) of the transformer is 10KW, the working low-load limit value P (L) of the transformer is 20KW, and P (t) is less than or equal to P (L):
under the working condition 1, the actual power generation power P (GF) =0KW of the current photovoltaic system is less than the power generation state judgment power P (GFMK)5KW of the photovoltaic system, the energy storage system works in a discharge state, the situation that the micro-grid system reversely transmits power to a power grid due to load fluctuation at the moment is prevented, the energy storage system is in a standby state, and P (CNST) =0 KW;
working condition 2, the actual power generation power P (GF) =65KW of the current photovoltaic system, P (GF) ≥ photovoltaic system power generation state judgment power P (GFMK)5KW, the energy storage system works in a charging state, the situation that the micro-grid system reversely transmits power to the power grid due to load fluctuation at the moment is prevented, and the system automatically limits photovoltaic output power, wherein P (GFST) = [ P (GF) = (P (L) — P (t)) ] = [65- (20-10) ] =55 KW;
working condition 3, the actual power generation power P (GF) =65KW of the current photovoltaic system, P (GF) > photovoltaic system power generation state judgment power P (GFMK)5KW, the stored energy is not in a charging state, the energy storage system starts charging to consume the energy of the photovoltaic system, the charging and discharging set power P (CNST) = photovoltaic consumption set power P (XNST), P (XNST) = P (t) = P (L) =10-20 KW, and the charging and discharging set power P (CNST) of the energy storage system, wherein a negative value is the system charging, and a positive value is the system discharging.
And 5: the current load of the transformer P (t) =80KW, the load of the transformer P (t) ≧ P (L) + P (LHC) =20+10 KW, at the moment, P (GFST) =90KW, the photovoltaic output power is limited, the photovoltaic power output limit is removed, and P (GFST) = photovoltaic system rated power P (GFed) =125 KW; and (4) after the photovoltaic system runs at full scale, if the current load P (t) of the transformer is reduced and the condition of the step (4) is met, returning to the working state of the step (4).
Step 6: the current load P (t) =100KW of the transformer, P (L) + P (LHC) ≦ P (t) ≦ P (H) -P (HHC), 20+10 ≦ 100 ≦ 600-20, and the microgrid system enters a peak clipping and valley filling working mode according to a valley peak time period. Under the working condition 1, when the current system clock TM (ems) is 30 minutes at 2 hours of the day, and is within the interval of 0 hour at the start time TM (US1)0 of the power valley period and 59 hours at the end time TM (UZ1)7 of the valley period, the charging and discharging set power P (cnst) = valley period charging power P (UCST1) = -40KW for the energy storage system, and the energy storage system starts to charge; if the system clock TM (ems) is 30 minutes at 10 hours, and is within the interval of 0 hour at the start time TM (GS1)8 and 59 minutes at the end time TM (GZ1)18 hours of the peak period, the charging and discharging set power P (cnst) = peak period discharging power P (GFST1) =30KW for the energy storage system, and the energy storage system starts to discharge; if the system clock TM (ems) is 30 minutes at 21 hours, and is between the power spike period starting time TM (JS1)19 hours 0 and the spike period ending time TM (JZ1)23 hours 59 minutes, the energy storage system charge and discharge setting power P (cnst) = spike period discharge power P (JFST1) =20KW, and the energy storage system starts to discharge; if the transformer load P (t) has large fluctuation, the step 4 or the step 7 is carried out according to the situation.
And 7: the current load P (t) =610KW of the transformer, the requirement that the load P (t) ≥ P (H) of the transformer is met, 610 ≥ 600, the load of the transformer is too heavy, the micro-grid system automatically enters an expansion mode, if the discharge of the energy storage system is allowed, the energy storage system discharges, the charge and discharge set power P (CNST) = P (t) = P (H) = 610-; if the transformer load P (t) has large fluctuation, the step 4 or the step 6 is carried out according to the situation.
And 8: in the running process of the system, if the charge permission or the discharge permission condition of the energy storage system is not met, the system prohibits charging or discharging, the charge and discharge set power P (CNST) =0KW of the energy storage system is achieved, and the energy storage system enters a standby state.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An automatic coordination control method for a light storage charging and discharging micro-grid system is characterized by comprising the following steps:
collecting real-time load of a transformer of a micro-grid system and real-time power generation power of a photovoltaic system;
calibrating a working low-load limit value, a working high-load limit value and a working load interval of a transformer of the micro-grid system, wherein the lower limit of the working load interval is the sum of the working low-load limit value and a return difference value thereof, and the upper limit of the working load interval is the difference between the working high-load limit value and the return difference value thereof;
comparing the real-time load of the micro-grid system transformer with the working low-load limit value, the working high-load limit value and the working load interval respectively:
when the real-time load is smaller than or equal to the working low-load limit value, comparing the real-time power generation power of the photovoltaic system with the calibrated power generation state judgment power of the photovoltaic system, and when the real-time power generation power of the photovoltaic system is larger than the calibrated power generation state judgment power of the photovoltaic system, controlling an energy storage system of the micro-grid system to start charging to perform energy consumption of the photovoltaic system;
when the real-time load is in the working load interval, controlling the micro-grid system to enter a peak clipping and valley filling working mode in a valley peak period;
and when the real-time load is greater than or equal to the working high load limit value, controlling the micro-grid system to automatically enter a power distribution expansion mode.
2. The automatic coordination control method for the light storage charging and discharging microgrid system as claimed in claim 1, wherein the step of controlling the energy storage system of the microgrid system to start charging to consume the energy of the photovoltaic system comprises the following steps:
adjusting the charging and discharging set power P (CNST) of the energy storage system to photovoltaic absorption set power P (XNST), wherein the photovoltaic absorption set power P (XNST) is obtained by the following formula:
P(XNST)=P(t)-P(L)；
wherein, P (t) is the real-time load of the transformer; p (l) is the operating low load limit.
3. The automatic coordination control method for the light storage, charging and discharging micro-grid system according to claim 2, characterized by comprising the following steps:
and when the real-time load is less than or equal to the working low-load limit value and the real-time power generation power of the photovoltaic system is less than the power generation state judgment power, controlling the energy storage system to stand by, and adjusting the charge and discharge set power P (CNST) of the energy storage system to 0 KW.
4. The automatic coordination control method for the light storage, charging and discharging micro-grid system according to claim 3, characterized by comprising the following steps:
when the real-time load is less than or equal to the working low-load limit value, the real-time generating power of the photovoltaic system is greater than or equal to the generating state judgment power, and the energy storage system is in a charging state, the output power of the photovoltaic system is limited, and the generating set power P (GFST) of the photovoltaic system is adjusted according to the following formula:
P(GFST)=P(GF)-(P(L)-P(t))；
wherein, p (gf) is the real-time power generation power of the photovoltaic system, p (l) is the working low-load limit value, and p (t) is the real-time load of the transformer.
5. The automatic coordination control method for the light storage, charging and discharging micro-grid system according to claim 4, characterized by comprising the following steps:
when the real-time load is greater than or equal to the lower limit of the working load interval, adjusting the power generation set power P (GFST) of the photovoltaic system to the rated power P (GFed) of the photovoltaic system.
6. The automatic coordination control method for the light storage, charging, discharging and microgrid system as claimed in any one of claims 1 to 5, wherein the step of controlling the microgrid system to enter a peak clipping and valley filling working mode in a valley period comprises the following steps:
determining the time interval of the system clock TM (EMS):
when the system clock TM (EMS) is in the interval between the power valley period starting time TM (US1) and the valley period ending time TM (UZ1), adjusting the charging and discharging set power P (CNST) of the energy storage system to the valley period charging power P (UCST1), and starting charging the energy storage system;
when a system clock TM (EMS) is in an interval between a power peak period starting time TM (GS1) and a peak period ending time TM (GZ1), adjusting charging and discharging set power P (CNST) of the energy storage system to peak period discharging power P (GFST1), and starting discharging the energy storage system;
when the system clock TM (ems) is within the interval between the power spike period start time TM (JS1) and the spike period end time TM (JZ1), the energy storage system charge and discharge setting power P (cnst) is adjusted to the spike period discharge power P (JFST1), and the energy storage system starts to discharge.
7. The automatic coordination control method for the light storage charging and discharging micro-grid system as claimed in any one of claims 1 to 5, wherein the step of controlling the micro-grid system to automatically enter a power distribution expansion mode comprises the following steps:
adjusting the charging and discharging set power P (CNST) of the energy storage system to the capacity expansion mode discharging power P (KRST), wherein the capacity expansion mode discharging power P (KRST) is obtained by the following formula:
P(KRST)=P(t)-P(H)；
wherein, P (t) is the real-time load of the transformer; p (H) is the work high load limit.
8. A computer system comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps of the method of any of claims 1 to 7 when executing the computer program.
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