CN112671017A - Energy system control method and device and energy system - Google Patents
Energy system control method and device and energy system Download PDFInfo
- Publication number
- CN112671017A CN112671017A CN202011288113.8A CN202011288113A CN112671017A CN 112671017 A CN112671017 A CN 112671017A CN 202011288113 A CN202011288113 A CN 202011288113A CN 112671017 A CN112671017 A CN 112671017A
- Authority
- CN
- China
- Prior art keywords
- energy storage
- storage unit
- energy
- unit
- power generation
- 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.)
- Pending
Links
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses an energy system control method, an energy system control device and an energy system, and relates to the field of energy systems.
Description
Technical Field
The invention relates to the field of energy systems, in particular to an energy system control method, an energy system control device and an energy system.
Background
With the large-scale development and utilization of new energy, in recent years, photovoltaic power generation has become one of the most promising renewable energy power generation technologies. The existing energy system comprises a power generation unit, an energy storage unit and a load unit, wherein the power generation unit utilizes photovoltaic power generation to supply power to the load unit, and the energy storage unit is used for storing electric energy and discharging when the power generation unit is insufficient in power supply so as to be used by the load unit.
However, when the generated energy of the power generation unit is too much and cannot be consumed in time, the supply voltage of the energy system is too high, which affects the reliability of the energy system.
Disclosure of Invention
The first purpose of the present invention is to provide an energy system control method, an energy system control device and an energy system, which can improve the reliability of the energy system and save the cost.
The purpose of the invention is realized by the following technical scheme:
an energy system control method, the energy system includes a power generation unit, an energy storage unit and a load unit; the power generation unit is respectively connected with the energy storage unit and the load unit;
the energy system control method comprises the following steps:
acquiring the generated energy of a power generation unit, the power consumption of an energy storage unit and the power consumption of a load unit;
if the generated energy of the power generation unit is larger than the total power consumption of the energy system, gradually reducing the output power of the power generation unit according to a preset step length; wherein the total power consumption of the energy system comprises the power consumption of the energy storage unit and the power consumption of the load unit.
Preferably, after the step of obtaining the power generation amount of the power generation unit, the power consumption of the energy storage unit and the power consumption of the load unit, the method further comprises the following steps:
and if the generated energy of the power generation unit is less than or equal to the total power consumption of the energy system, controlling the power generation unit to output at the maximum power.
Preferably, after the step of obtaining the power generation amount of the power generation unit, the power consumption of the energy storage unit and the power consumption of the load unit, the method further comprises the following steps:
if the generated energy of the power generation unit is larger than the electricity consumption of the load unit, acquiring the residual electricity of the energy storage unit;
and if the residual electric quantity of the energy storage unit is smaller than a preset charging electric quantity threshold value, controlling the energy storage unit to charge.
Preferably, the step of controlling the charging of the energy storage unit includes:
acquiring a preset maximum charging amount of an energy storage unit and a charging input voltage of the energy storage unit;
acquiring a charging coefficient corresponding to the residual electric quantity from a preset charging coefficient table according to the residual electric quantity of the energy storage unit; the larger the residual capacity of the energy storage unit is, the smaller the charging coefficient is;
acquiring the charging current of the energy storage unit according to the following formula:
wherein, ICIs the charging current of the energy storage unit, alpha is the charging coefficient, WCMAXIs the maximum charge of the energy storage unit;
and charging the energy storage unit according to the charging current.
Preferably, after the step of obtaining the remaining capacity of the energy storage unit, the method further includes:
and if the residual electric quantity of the energy storage unit is greater than or equal to a preset charging electric quantity threshold value, controlling the energy storage system to be in a standby state.
Preferably, after the step of obtaining the power generation amount of the power generation unit, the power consumption of the energy storage unit and the power consumption of the load unit, the method further comprises the following steps:
if the generated energy of the power generation unit is smaller than the electricity consumption of the load unit, acquiring the residual electricity of the energy storage unit;
and if the residual electric quantity of the energy storage unit is larger than a preset discharging electric quantity threshold value, controlling the energy storage unit to discharge.
Preferably, the step of controlling the discharge of the energy storage unit includes:
acquiring the preset maximum discharge capacity of the energy storage unit and the discharge output voltage of the energy storage unit;
acquiring a discharge coefficient corresponding to the residual electric quantity from a preset discharge coefficient table according to the residual electric quantity of the energy storage unit; the larger the residual capacity of the energy storage unit is, the larger the corresponding discharge coefficient is;
obtaining the discharge current of the energy storage unit according to the following formula:
wherein, IFIs the discharge current of the energy storage unit, beta is the discharge coefficient, WFMAXThe maximum discharge capacity of the energy storage unit;
and discharging the energy storage unit according to the discharge current.
Preferably, the energy system further comprises a fuel power generation unit;
after the step of controlling the energy storage unit to discharge, the method further comprises the following steps:
acquiring the discharge capacity of the energy storage unit;
if the generated energy of the power generation unit and the discharge capacity of the energy storage unit are smaller than the total power consumption of an energy system, controlling the fuel power generation unit to generate power;
otherwise, controlling the fuel power generation unit to be in a standby state.
A second object of the present invention is to provide an energy system control device, the energy system including a power generation unit, an energy storage unit, and a load unit; the power generation unit is respectively connected with the energy storage unit and the load unit;
the energy system control device includes:
the data acquisition module is used for acquiring the generated energy of the power generation unit, the power consumption of the energy storage unit and the power consumption of the load unit;
the output adjusting module is used for gradually reducing the output power of the power generation unit according to a preset step length if the generated energy of the power generation unit is larger than the total power consumption of the energy system; wherein the total power consumption of the energy system comprises the power consumption of the energy storage unit and the power consumption of the load unit.
A third object of the present invention is to provide an energy source system, comprising: the system comprises a power generation unit, an energy storage unit, a controller and a load unit; the power generation unit is respectively connected with the energy storage unit and the load unit, and the controller is respectively connected with the power generation unit, the energy storage unit and the load unit;
the controller comprises a memory and a processor;
the memory for storing one or more programs;
when the one or more programs are executed by the processor, the processor is caused to implement the energy system control method according to any one of the above.
According to the invention, whether the generated energy of the power generation unit can meet the power consumption requirement of the energy system is judged by comparing the generated energy of the power generation unit with the total power consumption of the energy system, and when the generated energy of the power generation unit is larger than the total power consumption of the energy system, the output power is gradually reduced by controlling the power generation unit according to the preset step length, so that the problem that the power supply voltage of the energy system is too high due to the fact that the generated power is too large and cannot be consumed in time, the operation stability of the energy system is influenced is avoided, and the cost is saved.
For a better understanding and practice, the invention is described in detail below with reference to the accompanying drawings.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be derived on the basis of the following drawings without inventive effort.
Fig. 1 is a flowchart of one embodiment of a method of controlling an energy system according to the present invention;
fig. 2 is a schematic structural diagram of one embodiment of an energy system control device according to the present invention;
fig. 3 is a schematic structural diagram of one embodiment of an energy system according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
It should be understood that the embodiments described are only some embodiments of the present application, and not all embodiments. All other examples, which can be obtained by a person skilled in the art without making any inventive step based on the embodiments in the present application, belong to the scope of protection of the embodiments in the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the application, as detailed in the appended claims. In the description of the present application, it is to be understood that the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not necessarily used to describe a particular order or sequence, nor are they to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
As shown in fig. 1, an embodiment of the present application provides an energy system control method, which may be applied to an energy system, where the energy system includes a power generation unit, an energy storage unit, and a load unit; the power generation unit is respectively connected with the energy storage unit and the load unit;
in one embodiment, the power generation unit may be a photovoltaic cell or a photovoltaic power generation device formed of a photovoltaic power generation matrix.
The energy storage unit can be an energy storage battery with charging and discharging functions.
The load unit is a load of the energy system and is used for consuming electric energy of the energy system.
The energy system control method comprises the following steps:
step S1: and acquiring the generated energy of the power generation unit, the power consumption of the energy storage unit and the power consumption of the load unit.
The generated energy of the power generation unit, the power consumption of the energy storage unit and the power consumption of the load unit can be acquired through the power detection devices arranged on the power-on lines of the power generation unit, the energy storage unit and the load unit.
Step S2: and if the generated energy of the power generation unit is larger than the total power consumption of the energy system, gradually reducing the output power of the power generation unit according to a preset step length.
The total power consumption of the energy system is the power consumption required by the operation of the energy system, and comprises the power consumption of the energy storage unit and the power consumption of the load unit. In one embodiment, the total power usage of the energy system may be a sum of the power usage of the energy storage unit and the power usage of the load unit.
In the embodiment of the application, whether the generated energy of the power generation unit can meet the power consumption requirement of the energy system is judged by comparing the generated energy of the power generation unit with the total power consumption of the energy system, and when the generated energy of the power generation unit is greater than the total power consumption of the energy system, the output power is gradually reduced by controlling the power generation unit according to the preset step length, so that the problem that the power supply voltage of the energy system is too high due to the fact that the generated power is too large and cannot be consumed in time, the operation stability of the energy system is influenced is avoided, and the cost is saved.
After the step of obtaining the generating capacity of the generating unit, the power consumption of the energy storage unit and the power consumption of the load unit, the method further comprises the following steps:
and if the generated energy of the power generation unit is less than or equal to the total power consumption of the energy system, controlling the power generation unit to output at the maximum power.
In an embodiment, the Power generation unit may be controlled to output the Maximum Power by using a Maximum Power Point Tracking (MPPT) manner, where the MPPT means that the Maximum Power Point Tracking is to detect a current-voltage change of the Power generation unit and adjust a duty ratio of a pulse width modulation signal of the voltage converter according to the change of the current-voltage change, so that the Power generation unit realizes Maximum Power output, and thus outputs more electric quantity and improves Power generation efficiency.
In an exemplary embodiment, after the step of obtaining the power generation amount of the power generation unit, the power consumption of the energy storage unit and the power consumption of the load unit, the method further comprises:
and if the generated energy of the power generation unit is greater than the electricity consumption of the load unit, acquiring the residual electricity of the energy storage unit.
And if the residual electric quantity of the energy storage unit is smaller than a preset charging electric quantity threshold value, controlling the energy storage unit to charge.
The residual capacity of the energy storage unit is the proportion of the available capacity in the energy storage system to the nominal capacity.
When the generated energy of the power generation unit is larger than the electricity consumption of the load unit, the generated energy of the power generation unit is judged to meet the electricity consumption requirement of the load unit, and whether the energy storage unit needs to be charged or not is further judged so as to improve the electricity utilization rate of the power generation unit.
The preset charging electric quantity threshold value can be the nominal capacity of the battery of the energy storage unit, and can also be set according to the actual running condition of the energy storage unit.
When the residual electric quantity of the energy storage unit is smaller than a preset charging electric quantity threshold value, at the moment, the energy storage unit is judged to need to be charged, and the power generation unit is controlled to charge the energy storage unit. And if the residual electric quantity of the energy storage unit is greater than or equal to the preset charging electric quantity threshold value, judging that the energy storage unit does not need to be charged, and controlling the energy storage system to be in a standby state.
The power generation unit can directly provide electric energy for charging the energy storage unit, and can also adjust the charging mode of the energy storage unit according to the power utilization condition of each unit of the energy system so as to realize the maximum utilization of the electric energy of the energy system.
In one embodiment, the step of controlling the charging of the energy storage unit includes:
and acquiring the preset maximum charging amount of the energy storage unit and the charging input voltage of the energy storage unit.
And acquiring a charging coefficient corresponding to the residual electric quantity from a preset charging coefficient table according to the residual electric quantity of the energy storage unit.
Acquiring the charging current of the energy storage unit according to the following formula:
wherein, ICIs the charging current of the energy storage unit, alpha is the charging coefficient, WCMAXIs the maximum charge of the energy storage unit, Ut1The charging input voltage of the energy storage unit is provided.
And charging the energy storage unit according to the charging current.
The maximum charging amount of the preset energy storage unit can be set according to the specific running condition of the energy system.
The charging output voltage of the energy storage unit can be detected by electric energy detection equipment arranged on a charging loop of the energy storage unit.
Each charging coefficient corresponding to the residual electric quantity of the energy storage unit is stored in the preset charging coefficient table, wherein the larger the residual electric quantity of the energy storage unit is, the smaller the corresponding charging coefficient is.
Specifically, in one embodiment, the charge factor table is as shown in table 1:
TABLE 1 charging coefficient table
| Remaining capacity SOC | Coefficient of charge alpha |
| 95％＜SOC≤100％ | 80％ |
| 90％＜SOC≤95％ | 90％ |
| SOC≤90％ | 100％ |
According to the residual electric quantity of the energy storage unit, a charging coefficient alpha corresponding to the residual electric quantity is searched from the charging coefficient table, and the charging current of the energy storage unit is calculated according to the formula.
In an exemplary embodiment, after the step of obtaining the power generation amount of the power generation unit, the power consumption of the energy storage unit and the power consumption of the load unit, the method further comprises:
if the generated energy of the power generation unit is smaller than the electricity consumption of the load unit, acquiring the residual electricity of the energy storage unit;
if the residual electric quantity of the energy storage unit is larger than a preset discharging electric quantity threshold value, controlling the energy storage unit to discharge;
when the generated energy of the power generation unit is smaller than the electricity consumption of the load unit, the generated energy of the power generation unit is judged to be incapable of meeting the electricity consumption requirement of the load unit, and at the moment, the energy storage unit is required to discharge to meet the electricity consumption requirement of the energy system.
The preset discharging electric quantity threshold value can be the minimum electric quantity required by the energy storage unit to maintain normal operation of the energy storage unit, and can be determined according to the specific operation condition of the energy storage unit.
When the residual electric quantity of the energy storage unit is larger than the preset discharging electric quantity threshold value, the energy storage unit is indicated to maintain normal operation of the energy storage unit and simultaneously have surplus electric quantity for the energy system to consume, and at the moment, the energy storage system can be controlled to discharge to meet the power consumption requirement of the energy system; and when the residual electric quantity of the energy storage unit is smaller than or equal to a preset discharging electric quantity threshold value, judging that the residual electric quantity of the energy storage unit can only maintain self operation, and controlling the energy storage system to be in a standby state at the moment.
In one embodiment, the step of controlling the discharge of the energy storage unit includes:
acquiring the preset maximum discharge capacity of the energy storage unit and the discharge output voltage of the energy storage unit;
acquiring a discharge coefficient corresponding to the residual electric quantity from a preset discharge coefficient table according to the residual electric quantity of the energy storage unit;
obtaining the discharge current of the energy storage unit according to the following formula:
wherein, IFIs the discharge current of the energy storage unit, beta is the discharge coefficient, WFMAXIs the maximum discharge of the energy storage unit, Ut2The output voltage is the discharge of the energy storage unit.
And discharging the energy storage unit according to the discharge current.
The maximum discharge capacity of the preset energy storage unit can be set according to the specific operation condition of the energy system.
The discharge output voltage of the energy storage unit can be detected by electric energy detection equipment arranged on a discharge loop of the energy storage unit.
Each discharge coefficient corresponding to the residual electric quantity of the energy storage unit is stored in the preset discharge coefficient table, wherein the larger the residual electric quantity of the energy storage unit is, the larger the corresponding discharge coefficient is.
Specifically, in one embodiment, the discharge coefficient table is shown in table 2:
TABLE 2 discharge coefficient table
| Residual capacity SOC of energy storage unit | Discharge coefficient beta |
| 10％＜SOC≤15％ | 80％ |
| 15％＜SOC≤20％ | 90％ |
| 20％＜SOC≤100％ | 100％ |
According to the residual electric quantity of the energy storage unit, the discharge coefficient beta corresponding to the residual electric quantity is searched from the discharge coefficient table, the discharge current of the energy storage unit is calculated according to the formula, when the residual electric quantity of the energy storage unit is smaller, the discharge current of the energy storage system is smaller, the energy storage unit is placed to be over-discharged to cause battery damage by reducing the discharge current, and the charge-discharge cycle life and the reliability of the energy storage unit are improved.
In an exemplary embodiment, the energy system further comprises a fuel power unit;
the fuel power generation unit can be a fuel cell, and the fuel cell has green, high-efficiency, flexible modular structure and stable power output, and is one of green energy sources widely applied. However, it is often difficult for a fuel cell to respond to photovoltaic power generation and power load transient quickly due to slow internal electrochemical and thermodynamic reactions, and in order to improve the operation stability of an energy system, the embodiment of the present application further includes, after the step of controlling the discharge of the energy storage unit:
acquiring the discharge capacity of the energy storage unit;
and if the generated energy of the power generation unit and the discharged energy of the energy storage unit are smaller than the total power consumption of the energy system, controlling the fuel power generation unit to generate power, otherwise, controlling the fuel power generation unit to be in a standby state.
The discharge amount of the energy storage unit can be detected by electric energy detection equipment arranged on a discharge loop of the energy storage unit.
When the generated energy of the power generation unit and the discharge capacity of the energy storage unit are larger than or equal to the total power consumption of the energy system, the power generation unit and the energy storage unit with more stable power supply quality are used for supplying power to the energy system, and the stability and the robustness of the energy system are improved. When the generated energy of the power generation unit and the discharge capacity of the energy storage unit are smaller than the total power consumption of the energy system, the power generation unit and the energy storage unit cannot meet the power consumption requirement of the energy system, and the stable operation of the energy system is ensured by generating power with the help of the fuel power generation unit to meet the power consumption requirement of the energy system.
As shown in fig. 2, an embodiment of the present application further provides an energy system control apparatus, which may be applied to an energy system, where the energy system includes a power generation unit, an energy storage unit, and a load unit; the power generation unit is respectively connected with the energy storage unit and the load unit;
the energy system control device includes:
the data acquisition module 1 is used for acquiring the generated energy of the power generation unit, the power consumption of the energy storage unit and the power consumption of the load unit;
the output adjusting module 2 is used for gradually reducing the output power of the power generation unit according to a preset step length if the generated energy of the power generation unit is larger than the total power consumption of the energy system; wherein the total power consumption of the energy system comprises the power consumption of the energy storage unit and the power consumption of the load unit.
It should be noted that, when the energy system control device provided in the foregoing embodiment executes the energy system control method, only the division of the above functional modules is taken as an example, and in practical applications, the functions may be distributed to different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the functions described above. In addition, the energy system control device and the energy system control method provided by the above embodiments belong to the same concept, and details of implementation processes thereof are referred to in the method embodiments and are not described herein again.
As shown in fig. 3, the embodiment of the present application further provides an energy system, which includes a power generation unit 1, an energy storage unit 2, a load unit 3, a first dc bus 4, a controller 5, and a fuel power generation unit 6.
The power generation unit 1 comprises a photovoltaic cell 11 and a photovoltaic voltage conversion unit 12, wherein the photovoltaic cell 11 is connected with the photovoltaic voltage conversion unit 12.
The photovoltaic voltage conversion unit 12 is configured to convert the generated voltage of the photovoltaic cell into a target voltage, and output the target voltage to the first dc bus 4. Wherein the target voltage may be determined according to a load size of the load unit.
The energy storage unit 2 comprises an energy storage control unit 21 and an energy storage battery 22 which are connected with each other, and the energy storage voltage conversion unit 21 is connected with the first direct current bus 4;
the energy storage voltage conversion unit 21 is used for controlling the energy storage battery 22 to be in a charging, discharging or standby working state, controlling the charging current of the energy storage battery 22 in the charging state, and controlling the discharging current of the energy storage battery 22 in the discharging state.
The load unit 3 comprises a first load 31, a power supply voltage conversion unit 32, a second direct current bus 33 and a second load 34;
the first load 31 is connected to the first dc bus 4.
The power supply voltage conversion unit 32 is connected to the first dc bus 4 and the second dc bus 33, respectively, and the second load 34 is connected to the second dc bus 33.
The controller 5 is used for acquiring a plurality of operating parameters in an energy system and receiving a plurality of preset parameters set by a user, performing logic judgment according to the operating parameters and the preset parameters, and issuing a control instruction to control the operation of the power generation unit 1, the energy storage unit 2 and the fuel power generation unit 6.
The operation parameters include, but are not limited to, the amount of power generation by the power generation unit 1, the amount of charge and discharge of the energy storage unit 2, the amount of remaining power of the energy storage unit 2, and the amount of power used by the load unit 3, and the preset parameters include, but are not limited to, the maximum amount of charge of the energy storage unit 2 and the maximum amount of discharge of the energy storage unit 2.
The controller 5 includes a memory 51 and a processor 52;
the memory 51 for storing one or more programs;
when executed by the processor 52, the one or more programs cause the processor to implement the energy system control method as described in any one of the above.
The fuel power generation unit 6 includes a fuel cell 61, a relay switch 62, and a fuel voltage conversion unit 63; the fuel cell 61 is connected to the fuel voltage conversion unit 63 via a relay switch 62.
The relay switch 62 is used for receiving a control signal of the controller 5 and controlling the fuel cell 61 to be turned on and off. The fuel voltage conversion unit 63 outputs a voltage to the first dc bus 4.
Specifically, in the embodiment of the present application, the first load 31 is a 400V dc load, the first dc bus 4 is a 400V dc bus, the photovoltaic voltage conversion unit 12 is configured to convert the voltage generated by the photovoltaic cell 11 into 400V dc, the fuel voltage conversion unit 63 is configured to convert the voltage generated by the fuel cell 61 into 400V dc, the second load 34 is a 48V dc load, the second dc bus 33 is a 48V dc bus, and the power supply voltage conversion unit 32 is configured to convert the 400V dc into 48V dc.
The energy system adopts the photovoltaic cell, the fuel cell and the energy storage cell to supply power respectively, has higher expansibility, and can meet the power generation requirements of different capacity grades, and the control method of the energy system determines the electric energy management and distribution strategies of the photovoltaic cell, the fuel cell and the energy storage cell by comparing the power consumption of the load unit with the power generation quantity of the photovoltaic cell, the fuel cell and the energy storage cell, thereby improving the electric energy management and scheduling capabilities of the energy system; according to the method and the device, the energy storage battery is used for participating in management and scheduling of the energy system, the problem that the fuel battery is difficult to respond quickly due to slow internal electrochemical and thermodynamic reactions is solved, quick dynamic response of the energy system is achieved, and stability and robustness of the energy system are improved.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The energy system control method is characterized in that the energy system comprises a power generation unit, an energy storage unit and a load unit; the power generation unit is respectively connected with the energy storage unit and the load unit;
the energy system control method comprises the following steps:
acquiring the generated energy of a power generation unit, the power consumption of an energy storage unit and the power consumption of a load unit;
if the generated energy of the power generation unit is larger than the total power consumption of the energy system, gradually reducing the output power of the power generation unit according to a preset step length; wherein the total power consumption of the energy system comprises the power consumption of the energy storage unit and the power consumption of the load unit.
2. The energy system control method according to claim 1, characterized in that: after the step of obtaining the generating capacity of the generating unit, the power consumption of the energy storage unit and the power consumption of the load unit, the method further comprises the following steps:
and if the generated energy of the power generation unit is less than or equal to the total power consumption of the energy system, controlling the power generation unit to output at the maximum power.
3. The energy system control method according to claim 1, further comprising, after the step of obtaining the amount of power generation by a power generation unit, the amount of power used by an energy storage unit, and the amount of power used by the load unit:
if the generated energy of the power generation unit is larger than the electricity consumption of the load unit, acquiring the residual electricity of the energy storage unit;
and if the residual electric quantity of the energy storage unit is smaller than a preset charging electric quantity threshold value, controlling the energy storage unit to charge.
4. The energy system control method according to claim 3, wherein the step of controlling the charging of the energy storage unit includes:
acquiring a preset maximum charging amount of an energy storage unit and a charging input voltage of the energy storage unit;
acquiring a charging coefficient corresponding to the residual electric quantity from a preset charging coefficient table according to the residual electric quantity of the energy storage unit; the larger the residual capacity of the energy storage unit is, the smaller the charging coefficient is;
acquiring the charging current of the energy storage unit according to the following formula:
wherein, ICIs the charging current of the energy storage unit, alpha is the charging coefficient, WCMAXIs the maximum charge of the energy storage unit;
and charging the energy storage unit according to the charging current.
5. The energy system control method according to claim 3, further comprising, after the step of obtaining the remaining amount of electricity of the energy storage unit:
and if the residual electric quantity of the energy storage unit is greater than or equal to a preset charging electric quantity threshold value, controlling the energy storage system to be in a standby state.
6. The energy system control method according to claim 3, further comprising, after the step of obtaining the amount of power generation by the power generation unit, the amount of power used by the energy storage unit, and the amount of power used by the load unit:
if the generated energy of the power generation unit is smaller than the electricity consumption of the load unit, acquiring the residual electricity of the energy storage unit;
and if the residual electric quantity of the energy storage unit is larger than a preset discharging electric quantity threshold value, controlling the energy storage unit to discharge.
7. The energy system control method according to claim 6, wherein the step of controlling the energy storage unit to discharge comprises:
acquiring the preset maximum discharge capacity of the energy storage unit and the discharge output voltage of the energy storage unit;
acquiring a discharge coefficient corresponding to the residual electric quantity from a preset discharge coefficient table according to the residual electric quantity of the energy storage unit; the larger the residual capacity of the energy storage unit is, the larger the corresponding discharge coefficient is;
obtaining the discharge current of the energy storage unit according to the following formula:
wherein, IFIs the discharge current of the energy storage unit, beta is the discharge coefficient, WFMAXThe maximum discharge capacity of the energy storage unit;
and discharging the energy storage unit according to the discharge current.
8. The energy system control method according to any one of claims 6 to 7, wherein the energy system further includes a fuel power generation unit;
after the step of controlling the energy storage unit to discharge, the method further comprises the following steps:
acquiring the discharge capacity of the energy storage unit;
if the generated energy of the power generation unit and the discharge capacity of the energy storage unit are smaller than the total power consumption of an energy system, controlling the fuel power generation unit to generate power;
otherwise, controlling the fuel power generation unit to be in a standby state.
9. An energy system control device is characterized in that the energy system comprises a power generation unit, an energy storage unit and a load unit; the power generation unit is respectively connected with the energy storage unit and the load unit;
the energy system control device includes:
the data acquisition module is used for acquiring the generated energy of the power generation unit, the power consumption of the energy storage unit and the power consumption of the load unit;
the output adjusting module is used for gradually reducing the output power of the power generation unit according to a preset step length if the generated energy of the power generation unit is larger than the total power consumption of the energy system; wherein the total power consumption of the energy system comprises the power consumption of the energy storage unit and the power consumption of the load unit.
10. An energy system, comprising: the system comprises a power generation unit, an energy storage unit, a controller and a load unit; the power generation unit is respectively connected with the energy storage unit and the load unit, and the controller is respectively connected with the power generation unit, the energy storage unit and the load unit;
the controller comprises a memory and a processor;
the memory for storing one or more programs;
when the one or more programs are executed by the processor, the processor is caused to implement the energy system control method according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011288113.8A CN112671017A (en) | 2020-11-17 | 2020-11-17 | Energy system control method and device and energy system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011288113.8A CN112671017A (en) | 2020-11-17 | 2020-11-17 | Energy system control method and device and energy system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112671017A true CN112671017A (en) | 2021-04-16 |
Family
ID=75403419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011288113.8A Pending CN112671017A (en) | 2020-11-17 | 2020-11-17 | Energy system control method and device and energy system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112671017A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931722A (en) * | 2012-11-28 | 2013-02-13 | 上海师范大学 | Distributed power supply management method and system |
| JP2017085867A (en) * | 2015-10-23 | 2017-05-18 | エルジー エレクトロニクス インコーポレイティド | Energy storage system |
| CN106786554A (en) * | 2017-01-17 | 2017-05-31 | 珠海格力电器股份有限公司 | The control method and device of micro-grid system |
| CN109149624A (en) * | 2017-06-27 | 2019-01-04 | 上海太阳能科技有限公司 | A kind of predictable light storage distributed energy management system and its control method |
-
2020
- 2020-11-17 CN CN202011288113.8A patent/CN112671017A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931722A (en) * | 2012-11-28 | 2013-02-13 | 上海师范大学 | Distributed power supply management method and system |
| JP2017085867A (en) * | 2015-10-23 | 2017-05-18 | エルジー エレクトロニクス インコーポレイティド | Energy storage system |
| CN106786554A (en) * | 2017-01-17 | 2017-05-31 | 珠海格力电器股份有限公司 | The control method and device of micro-grid system |
| CN109149624A (en) * | 2017-06-27 | 2019-01-04 | 上海太阳能科技有限公司 | A kind of predictable light storage distributed energy management system and its control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10756544B2 (en) | Energy storage system and management method thereof | |
| CN104092278A (en) | Energy management method applied to photovoltaic energy storage system | |
| US8410750B2 (en) | Method for solar power energy management with intelligent selection of operating modes | |
| CN109193723B (en) | Combined base station backup energy storage power supply and control method | |
| CN113765130A (en) | Operation control method of micro-grid | |
| US20230352959A1 (en) | Energy conversion management system and method | |
| CN105591383A (en) | Direct current micro-grid variable power control device and control method | |
| CN207234517U (en) | A kind of storage battery parallel power supply system based on straight-flow system | |
| CN208835762U (en) | A kind of energy storage for power supply system applied to base station | |
| CN206452121U (en) | Intelligent peak load shifting is superimposed the power-supply system of photovoltaic generation | |
| CN116316767B (en) | Network side power management control method and device for optical storage system | |
| CN109193724B (en) | Intelligent base station backup energy storage power supply and control method | |
| CN115622134B (en) | MPPT scheduling control method of photovoltaic power generation system | |
| CN116544982A (en) | Photovoltaic absorption and peak valley arbitrage optical storage system and control method thereof | |
| CN112671017A (en) | Energy system control method and device and energy system | |
| KR102463396B1 (en) | Energy storage system | |
| CN114884116A (en) | Power circuit, new energy control system and energy coordination method | |
| CN109599898B (en) | Control method and device for improving consumption of distributed power supply | |
| CN110620426A (en) | Power supply switching device and method | |
| CN112769244A (en) | Hybrid energy storage system utilizing retired battery pack and control method thereof | |
| JP2002315224A (en) | Fuel battery power source system and method for charging secondary cell in the fuel battery power source system | |
| CN213521298U (en) | Photovoltaic range extender hybrid power generation system | |
| KR102046821B1 (en) | Power distribution and power transmission control apparatus based on generation voltage of solar-cell power generating system | |
| CN110350579B (en) | Multi-energy-storage-battery operation model capable of achieving smooth photovoltaic output | |
| US20230155391A1 (en) | Power feeding system and power management device |
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 |