CN115864484A - Power energy control method of multi-energy complementary direct-current micro-grid - Google Patents
Power energy control method of multi-energy complementary direct-current micro-grid Download PDFInfo
- Publication number
- CN115864484A CN115864484A CN202211480675.1A CN202211480675A CN115864484A CN 115864484 A CN115864484 A CN 115864484A CN 202211480675 A CN202211480675 A CN 202211480675A CN 115864484 A CN115864484 A CN 115864484A
- Authority
- CN
- China
- Prior art keywords
- power
- direct current
- load
- energy
- real
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 42
- 230000000295 complement effect Effects 0.000 title claims abstract description 40
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 162
- 238000004146 energy storage Methods 0.000 claims abstract description 135
- 238000010248 power generation Methods 0.000 claims description 86
- 238000006243 chemical reaction Methods 0.000 claims description 31
- 230000005611 electricity Effects 0.000 claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 230000002354 daily effect Effects 0.000 description 87
- 230000002596 correlated effect Effects 0.000 description 6
- 238000007599 discharging Methods 0.000 description 6
- 230000000875 corresponding effect Effects 0.000 description 5
- 238000007792 addition Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 210000000352 storage cell Anatomy 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention provides a power energy control method of a multi-energy complementary direct current micro-grid, which comprises the following steps: in the trough period of power utilization, when the daily average generated power of the new energy is larger than the daily average consumed power of the load which is K1 times, the bidirectional direct current-to-direct current unit outputs power to the load; when the daily average generating power of the new energy is smaller than the load daily average consumed power which is K1 times, the bidirectional direct current-to-direct current unit charges the energy storage battery; in the wave level period of power utilization, the bidirectional direct current-to-direct current unit outputs power to a load; in the peak time period of power utilization, the bidirectional direct current-to-direct current unit outputs power to a load; wherein K1 is a real number greater than 0. The power energy control method of the multi-energy complementary direct current micro-grid can maintain the power energy balance in the direct current micro-grid, can respond to the demand of power grid peak shaving, and further reduces the power consumption cost; and meanwhile, new energy is utilized to the maximum extent, so that the total electric quantity consumed by drawing from the power grid is greatly reduced, and the carbon emission is reduced.
Description
Technical Field
The invention relates to the field of power supplies, in particular to a power energy control method of a multi-energy complementary direct-current micro-grid.
Background
In the topological structure of the direct-current micro-grid, a DC/DC bidirectional energy storage converter and a DC/DC photovoltaic MPPT charger are connected in parallel through a direct-current bus. According to the variable quantity delta Udc of the direct-current bus voltage, the control strategy can be divided into different control layers, the working mode of each converter is correspondingly adjusted under each control layer, and the power balance in the network is ensured. Each DC/DC regulates and controls the bus voltage through droop control, and the storage battery plays a role in balancing power energy flow in the direct-current micro-grid but lacks response to the power grid demand side.
How to further exert the peak shifting adjustment capacity of the energy storage unit on the power grid in the distributed power generation system and balance the power energy flow in the direct current micro-grid under various working conditions is one of the problems which need to be solved urgently in the industry at present.
Disclosure of Invention
In view of the above disadvantages of the prior art, an object of the present invention is to provide a power energy control method for a multi-energy complementary dc microgrid, which is used to solve the problem that an energy storage unit in the prior art cannot give consideration to peak shifting adjustment of a power grid and balance power energy flow of the dc microgrid.
In order to achieve the above and other related objects, the present invention provides a power energy control method for a multi-energy complementary dc microgrid, which comprises an ac-to-dc conversion unit and at least one new energy power generation device, an energy storage battery, and a bidirectional dc-to-dc conversion unit, and the power energy control method for the multi-energy complementary dc microgrid at least comprises:
in the trough period of power utilization, when the daily average generated power of the new energy is larger than the daily average consumed power of the load which is K1 times, the bidirectional direct current-to-direct current unit outputs power to the load; when the daily average generating power of the new energy is smaller than the load daily average consumed power which is K1 times, the bidirectional direct current-to-direct current unit charges the energy storage battery;
in the wave level period of power utilization, the bidirectional direct current-to-direct current unit outputs power to a load;
in the peak time period of power utilization, the bidirectional direct current-to-direct current unit outputs power to a load;
wherein K1 is a real number greater than 0.
Optionally, the method for determining the magnitude relationship between the daily average generated power of the new energy and the daily average consumed power of the load that is K1 times larger includes:
if the load daily accumulated consumed electric quantity of the new energy is larger than K1 times of the daily accumulated generated electric quantity of the new energy, judging the load daily average consumed power of the new energy, wherein the daily average generated power of the new energy is larger than K1 times of the daily average consumed power of the load; and otherwise, judging the load daily average consumed power of the new energy source with daily average generated power less than K1 times.
Optionally, the method for determining the magnitude relationship between the daily average generated power of the new energy and the daily average consumed power of the load multiplied by K1 includes:
in the peak time period and the wave level time period of power utilization, when the real-time generated power of the new energy is larger than the real-time consumed power of a load with K2 times, the timer is self-added;
if the timing result of the timer is more than or equal to the preset time, judging the load daily average consumed power of the new energy, wherein the daily average generated power of the new energy is more than K1 times; otherwise, judging the daily average power consumption of the load with the daily average power generation power of the new energy less than K1 times;
wherein K2 is a real number greater than 0.
More optionally, during a trough period of power usage:
when the daily average power generation power of the new energy is larger than K1 times of the daily average power consumption of the load, if the residual electric quantity of the energy storage battery is larger than a first set electric quantity, the bidirectional direct current-to-direct current unit outputs power to the load, and the output power of the bidirectional direct current-to-direct current unit is the preset output power of the energy storage battery;
when the daily average generated power of the new energy is smaller than K1 times of the daily average consumed power of the load, if the residual electric quantity of the energy storage battery is smaller than the electric quantity upper limit, the bidirectional direct current-to-direct current unit charges the energy storage battery.
More optionally, during the power usage level period:
when the real-time generating power of the new energy is less than or equal to K2 times of load real-time consumed power and the daily average generating power of the new energy is greater than K1 times of load daily average consumed power, the output power of the bidirectional direct current-to-direct current unit is a preset value;
when the real-time generating power of the new energy is less than or equal to K2 times of load real-time consumed power and the daily average generating power of the new energy is less than K1 times of load daily average consumed power, the output power of the bidirectional direct current-to-direct current unit changes according to the real-time generating power of the new energy;
when the real-time power generation power of the new energy is larger than K2 times of the real-time power consumption of the load, the output power of the bidirectional direct current-to-direct current unit changes according to the real-time power consumption of the load;
wherein K2 is a real number greater than 0.
More optionally, during the power usage level period:
when the real-time power generation power of the new energy is less than or equal to K2 times of the real-time power consumption of the load, and the daily average power generation power of the new energy is greater than K1 times of the daily average power consumption of the load, the energy storage battery outputs power to the load through the bidirectional direct current-to-direct current unit; at this time, if the real-time consumed power of the load is greater than the preset output power of the energy storage battery, the output power of the bidirectional direct current-to-direct current unit is the preset output power of the energy storage battery; if the real-time consumed power of the load is less than or equal to the preset output power of the energy storage battery, the output power of the bidirectional direct current-to-direct current unit is zero or the output power is alternately output;
when the new energy real-time power generation power is less than or equal to K2 times of load real-time power consumption and the new energy daily average power generation power is less than K1 times of load daily average power consumption, the new energy power generation device outputs power to the load through the bidirectional direct current-to-direct current unit, and the output power of the bidirectional direct current-to-direct current unit is K3 times of new energy real-time power generation power;
when the real-time power generation power of the new energy is larger than K2 times of the real-time power consumption of the load, the bidirectional direct current to direct current conversion unit outputs power to the load, and the output power of the bidirectional direct current to direct current conversion unit is K4 times of the real-time power consumption of the load;
wherein, K3 and K4 are real numbers larger than 0.
More optionally, when the real-time generated power of the new energy is less than or equal to K2 times of the real-time consumed power of the load, and the daily average generated power of the new energy is greater than K1 times of the daily average consumed power of the load, if the remaining electric quantity of the energy storage battery is greater than a second set electric quantity, the energy storage battery outputs power to the load through the bidirectional direct current-to-direct current unit; and if the residual electric quantity of the energy storage battery is less than or equal to a second set electric quantity, the output power of the bidirectional direct current to direct current conversion unit is zero.
Optionally, during peak periods of power usage:
when the real-time power generation power of the new energy is larger than the preset power generation power, if the real-time power consumption of the load is larger than the rated output power of the bidirectional direct current to direct current unit, the output power of the bidirectional direct current to direct current unit is the sum of the preset output power of the energy storage battery and the real-time power generation power of the new energy; if the real-time consumed power of the load is smaller than the minimum output power of the bidirectional direct current to direct current unit, the output power of the bidirectional direct current to direct current unit is the minimum output power or the output power is zero; otherwise, the output power of the bidirectional direct current to direct current unit is K5 times of the real-time power consumption of the load;
when the real-time power generation power of the new energy is smaller than or equal to the preset power generation power, if the real-time power consumption of the load is larger than the preset output power of the energy storage battery, the output power of the bidirectional direct current-to-direct current unit is the preset output power of the energy storage battery; if the real-time consumed power of the load is less than or equal to the preset output power of the energy storage battery, the output power of the bidirectional direct current-to-direct current unit is zero or the output power is alternately output;
wherein K5 is a real number.
More optionally, when the real-time generated power of the new energy is greater than a preset generated power, or the real-time generated power of the new energy is less than or equal to the preset generated power and the real-time consumed power of the load is greater than the preset output power of the energy storage battery, if the remaining power of any one of the energy storage batteries is less than a first preset power, the output power of the corresponding one of the bidirectional direct current to direct current conversion units is zero.
More optionally, the changing the output power of the bidirectional dc-dc unit to zero or the alternating output power includes: the bidirectional direct current-to-direct current units are arranged into N groups, and if N =1, the output power of the bidirectional direct current-to-direct current units is zero; if N is an integer which is more than or equal to 2, the N groups of bidirectional direct current to direct current units alternately output power to the load in a time-sharing manner, at the moment, the residual electric quantity of the energy storage battery corresponding to each bidirectional direct current to direct current unit is calculated regularly, M groups of bidirectional direct current to direct current unit output power with larger residual electric quantity of the energy storage battery are selected, the output power of each bidirectional direct current to direct current unit is 1/N of the preset output power of the energy storage battery, and M is an integer which is more than or equal to 1 and less than N.
More optionally, alternating current electric equipment is further arranged in the multi-energy complementary direct current micro-grid, and when the daily average generated energy of the new energy is smaller than the daily average consumed power of a load which is K1 times, and the alternating current power grid is normal, the alternating current electric equipment is powered by the alternating current power grid; otherwise, the direct current bus supplies power to the alternating current electric equipment through the direct current-to-alternating current unit.
As described above, the power energy control method for the multi-energy complementary dc microgrid of the present invention has the following beneficial effects:
1. according to the power energy control method of the multi-energy complementary direct current micro-grid, under the condition that the average generated energy of new energy is smaller than the average consumed electric quantity of a load, the charging and discharging directions of the DC/DC bidirectional direct current-to-direct current unit are controlled according to the peak-valley electricity price, and the power generated by the new energy is combined to supply power to the load. The power energy balance in the direct current micro-grid can be maintained, the peak load regulation requirement of the power grid can be responded, and the power utilization cost is further reduced.
2. According to the power energy control method of the multi-energy complementary direct current micro-grid, under the condition that the average generated energy of new energy is larger than the average consumed electric quantity of a load, the DC/DC bidirectional direct current to direct current unit is controlled to charge and discharge, the new energy DC/DC (MPPT) charges the energy storage battery and supplies power to the load at the peak moment, and when the new energy is weak in power generation at the wave level moment, the energy storage battery and the AC/DC (AC to direct current unit) discharge the load together, so that the total electric quantity consumed from the power grid is greatly reduced, more natural energy is utilized, and the carbon emission is reduced.
3. According to the power energy control method of the multi-energy complementary direct current micro-grid, under the condition that the average generated energy of new energy is larger than the average consumed electric energy of a load, the direct current bus supplies power to the air conditioner in the system, so that the total electric energy consumed by the power grid is greatly reduced, more natural energy is utilized, and the carbon emission is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a multi-energy complementary dc microgrid according to the present invention.
Fig. 2 is a schematic diagram illustrating another structure of the multi-energy complementary dc microgrid according to the present invention.
Description of the element reference numerals
1. Multi-energy complementary direct-current micro-grid
11. New energy power generation device
12. Energy storage battery
13. Bidirectional DC-to-DC unit
14. DC-to-AC unit
15. First AC contactor
16. Second AC contactor
17. AC electric equipment
18. AC-to-DC unit
19. Direct current electric equipment
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Please refer to fig. 1-2. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the drawings only show the components related to the present invention rather than being drawn according to the number, shape and size of the components in real time implementation, the type, number and ratio of the components in real time implementation can be changed freely, and the layout of the components can be more complicated.
The invention provides a power energy control method of a multi-energy complementary direct-current micro-grid, which is realized based on the multi-energy complementary direct-current micro-grid 1, wherein the multi-energy complementary direct-current micro-grid 1 comprises an alternating-current to direct-current conversion unit 18, at least one new energy power generation device 11, an energy storage battery 12 and a bidirectional direct-current to direct-current conversion unit 13.
As shown in fig. 1, as an implementation manner of the present invention, the multi-energy complementary dc microgrid 1 includes an ac-to-dc unit 18, N new energy power generation apparatuses 11, N energy storage batteries 12, and N bidirectional dc-to-dc units 13, where N is an integer greater than or equal to 1; the input end of the alternating current-to-direct current unit 18 is connected with an alternating current power grid AC, the output end of the alternating current-to-direct current unit is connected with a direct current BUS BUS, and alternating current in the alternating current power grid AC is converted into direct current and is supplied to the direct current BUS; a new energy power generation device 11, an energy storage battery 12 and a bidirectional direct current-to-direct current unit 13 form a group, and when N is larger than or equal to 2, the N groups are connected in parallel on a direct current BUS BUS. In each group, the new energy power generation device 11 generates electric energy based on new energy, and the new energy power generation device 11 includes but is not limited to a solar battery and/or a wind power generation device; the new energy Power generation device 11 includes a Power generation device and a control unit, and the control unit is, for example, a Maximum Power Point Tracker (MPPT). The energy storage battery 12 is connected with the output end of the new energy power generation device 11 and is used for storing electric energy; as an example, the positive electrode of the energy storage battery 12 is connected to the positive electrode of the battery output end of the new energy power generation device 11, and the negative electrode is connected to the negative electrode of the battery output end of the new energy power generation device 11. One end of the bidirectional direct current-to-direct current unit 13 is connected with the output end of the new energy power generation device 11, and the other end of the bidirectional direct current-to-direct current unit is connected with the direct current BUS, so that bidirectional energy conversion between the energy storage battery 12 and the direct current BUS is realized; as an example, the positive electrode of the battery input/output end of the bidirectional dc-to-dc unit 13 is connected to the positive electrode of the energy storage battery 12, the negative electrode of the battery input/output end is connected to the negative electrode of the energy storage battery 12, the positive electrode of the BUS input/output end is connected to the positive electrode of the dc BUS, and the negative electrode of the BUS input/output end is connected to the negative electrode of the dc BUS.
As shown in fig. 2, as another implementation manner of the present invention, the multi-energy complementary dc microgrid 1 includes N1 new energy power generation devices 11, N2 energy storage batteries 12, and N2 bidirectional dc-to-dc units 13, where N1 and N2 are integers greater than or equal to 1; the output end of each new energy power generation device 11 is directly connected to the direct current BUS, one energy storage battery 12 and one bidirectional direct current-to-direct current unit 13 form a group, and when N2 is larger than or equal to 2, the N2 groups are connected in parallel to the direct current BUS. One end of the bidirectional dc-dc conversion unit 13 is connected to the energy storage battery 12, and the other end is connected to the dc BUS, so as to realize bidirectional energy conversion between the energy storage battery 12 and the dc BUS.
It should be noted that, in actual use, the numbers of the new energy power generation device 11, the energy storage battery 12, and the bidirectional dc-to-dc unit 13 may be set according to a specific topology, which is not described herein again. The dc BUS is further connected with a load, where the load includes a dc load and/or an ac load, and in this example, the load is a dc power device 19, which is not described herein again.
The method controls the power energy of the direct-current micro-grid based on the relation between the new energy power generation power and the load power consumption in different power utilization periods, and optimizes the charging and discharging process by considering the difference of the electricity prices in different periods. As an example, the power peak period includes: spike period 20; the electricity prices are also different for different periods, peak period electricity prices = base electricity prices × 180% + governmental funds and additions, peak period electricity prices = base electricity prices × 149% + governmental funds and additions, boeing period electricity prices = base electricity prices + governmental funds and additions, valley period electricity prices = base electricity prices × 48% + governmental funds and additions.
The multi-energy complementary direct-current micro-grid power energy control method comprises the following steps:
in the trough period of power utilization, when the daily average generated power of the new energy is larger than the daily average consumed power of the load which is K1 times, the bidirectional direct current-to-direct current unit 13 outputs power to the load; when the daily average generating power of the new energy is smaller than the daily average consumed power of the load which is K1 times, the bidirectional direct current-to-direct current unit 13 charges the energy storage battery 12;
in the wave level period of power utilization, the bidirectional direct current-to-direct current unit 13 outputs power to a load;
in the peak period of the power utilization, the bidirectional dc-dc conversion unit 13 outputs power to the load.
It should be noted that K1 is a real number greater than 0, and the value range thereof can be set as required; in this embodiment, K1 has a value in the range of 0.5 to 2, preferably 0.9.
Specifically, as an example, the method for determining the magnitude relationship between the daily average generated power of the new energy and the daily average consumed power of K1 times of the load includes:
11 In the peak period and the wave-level period of the power utilization, when the real-time power generation power of the new energy is larger than K2 times of the real-time power consumption of the load, the timer is self-added.
More specifically, in the present embodiment, the timer has a timing range of 0 to h hours, that is, the self-adding upper limit of the timer is h hours, and the self-subtracting lower limit is 0 hour. The value of h is set according to K2 and the preset time in step 112), for example, h is set to 5 hours, that is, the timer counts the time of the load real-time consumed power of which the real-time generating power of the new energy is more than K2 times in the peak time period and the wave-flat time period of the power consumption every day, the timer is added up to 5 hours at most, and the time is not counted after 5 hours are reached. In practical use, the timer may not set a timing range, and is not limited to this embodiment.
More specifically, K2 is a real number greater than 0, and its value is set as needed, in this embodiment, the value range of K2 is set to 0.5 to 1.5, and is preferably 0.9.
More specifically, in this example, in order to determine the magnitude relationship between the daily average generated power of the new energy and the load daily average consumed power that is K1 times, the timer is cleared every day at a preset time point that is after the peak time period and the flat time period of the day and before the start of the next peak time period, as an example, the preset time point is the transition time from the valley time period to the flat time period, that is, 7 am.
12 If the timing result of the timer is more than or equal to the preset time, judging the daily average power consumption of the load of which the daily average power generation power of the new energy is more than K1 times; and otherwise, judging the load daily average consumed power of the new energy source with daily average generated power less than K1 times.
More specifically, counting the timing result of the timer after the peak time period and the flat time period of the power consumption of the same day are finished; in this embodiment, the statistical time of the timing result is set to be between day 23. In practical use, the definition of a day is not strictly limited to 0 to 24, and the specific time points may be slightly different, and it is enough to ensure that a day is 24 hours, so the statistical time of the counting result may be slightly later than 24 00 or slightly earlier than 24.
More specifically, the preset time is set based on actual needs, and as an example, the preset time is set to 3.5 hours.
It should be noted that, as another implementation manner of this example, in the peak period of the power consumption in step 111), when the real-time generated power of the new energy is less than or equal to the real-time consumed power of the load and greater than the preset generated power, the timer is self-decreased. The preset generating power can be set according to requirements, and in the embodiment, the preset generating power is set to be 500W; in practical use, the predetermined generated power includes, but is not limited to, 450W, 470W, 480W, 510W, and 530W. By taking the new energy power generation device 11 as a photovoltaic, for example, when the real-time power generation power of the photovoltaic is greater than or equal to 500W, it is determined that the photovoltaic is illuminated, and photovoltaic power generation can be realized; taking the new energy power generation device 11 as an example of a fan, when the real-time power generation power of the fan is greater than 500W, it is determined that the wind power is greater than 3 levels, and wind power generation can be realized.
Specifically, as another example, the method for determining the magnitude relation between the daily average generated power of the new energy and the daily average consumed power of K1 times of the load includes:
if the load daily accumulated consumed electric quantity of the new energy is larger than K1 times of the daily accumulated generated electric quantity of the new energy, judging the load daily average consumed power of the new energy, wherein the daily average generated power of the new energy is larger than K1 times; and otherwise, judging the load daily average consumed power of the new energy source with daily average generated power less than K1 times.
It should be noted that the method for determining the magnitude relationship between the daily average generated power of the new energy and the daily average consumed power of the load that is K1 times is not limited to the method illustrated in this embodiment, and any method that can achieve the determination of the magnitude relationship between the daily average generated power of the new energy and the daily average consumed power of the load that is K1 times is applicable to the present invention, including but not limited to calculating the daily average generated power of the new energy and the daily average consumed power of the load and then comparing them, which is not described herein again. In addition, the load daily average power consumption of the new energy daily average power generation power which is more than or less than K1 times is only two self-defined judgment conditions, and is not an actual working condition.
The following describes power energy control methods for different power consumption periods.
In the trough period of electricity usage:
21 When the daily average power generation power of the new energy is greater than K1 times of the daily average power consumption of the load, if the remaining power of the energy storage battery 12 is greater than a first set power, the bidirectional dc-dc converting unit 13 outputs power to the load, and the output power of the bidirectional dc-dc converting unit 13 is the preset output power of the energy storage battery 12.
Specifically, as an example, the first setting amount of electricity is set to 65% of the capacity of the energy storage battery 12; in practical use, the first setting electric quantity may be set according to needs, and is not limited to the embodiment. If the remaining capacity of the energy storage battery 12 is greater than 65%, the energy storage battery 12 discharges and outputs power to the load based on the bidirectional direct current to direct current unit 13; when the residual capacity of the energy storage battery 12 is 65%, the energy storage battery 12 stops discharging. In this process, even if the remaining capacity of the energy storage battery 12 is less than 65%, the bidirectional dc-dc conversion unit 13 does not charge the energy storage battery 12 any more.
22 When the daily average generated power of the new energy is less than K1 times the daily average consumed power of the load, if the remaining capacity of the energy storage battery 12 is less than the upper limit of the capacity, the bidirectional dc-to-dc unit 13 charges the energy storage battery 12.
Specifically, as an example, the upper limit of the charge amount is set to 95% to 100%, preferably 100%, of the capacity of the energy storage battery 12; in practical use, the upper limit of the electric quantity can be set according to needs, and is not limited to the embodiment. If the remaining capacity of the energy storage battery 12 does not reach 100%, the AC-to-dc unit 18 supplies power to the dc BUS, and the voltage on the dc BUS charges the energy storage battery 12 through the bidirectional dc-to-dc unit 13 (i.e., the energy storage battery 12 obtains electric energy from the AC power grid AC); and stopping charging until the residual capacity of the energy storage battery 12 reaches 100%.
It should be noted that the remaining capacity of the energy storage battery 12 can be obtained based on the SOC of the energy storage battery 12 or the voltage of the energy storage battery 12, which is not described herein again.
During the power-using wave-level period:
31 When the real-time generated power of the new energy is less than or equal to K2 times of the load real-time consumed power and the daily average generated power of the new energy is greater than K1 times of the daily average consumed power of the load, the output power of the bidirectional direct current-to-direct current unit 13 is a preset value.
Specifically, in this embodiment, when the real-time generated power of the new energy is less than or equal to K2 times of the real-time consumed power of the load, and the daily average generated power of the new energy is greater than K1 times of the daily average consumed power of the load, the energy storage battery 12 outputs power to the load through the bidirectional dc-to-dc conversion unit 13. At this time, the output power of the bidirectional dc-dc conversion unit 13 is determined based on the relationship between the preset output power of the energy storage battery 12 and the real-time power consumption of the load; if the real-time power consumption of the load is greater than the preset output power of the energy storage battery 12, the output power of the bidirectional dc-dc conversion unit 13 is the preset output power of the energy storage battery 12 (at this time, the preset value is the preset output power of the energy storage battery 12); if the real-time power consumption of the load is less than or equal to the preset output power of the energy storage battery 12, the output power of the bidirectional dc-to-dc unit 13 is zero or the output power is alternately output.
More specifically, as an example, in this process, if the remaining capacity of the energy storage battery 12 is greater than a second set capacity, the energy storage battery 12 outputs power to a load through the bidirectional dc-dc converting unit 13; if the remaining capacity of the energy storage battery 12 is less than or equal to a second set capacity, the output power of the bidirectional dc-dc conversion unit 13 is zero. The second setting electric quantity is larger than the first setting electric quantity, and can be set according to actual needs, for example, the second setting electric quantity is set to be 75% of the capacity of the energy storage battery 12. If the residual capacity of the energy storage battery 12 is greater than 75%, the energy storage battery 12 discharges and outputs power to the load based on the bidirectional direct current-to-direct current unit 13; and when the residual capacity of the energy storage battery 12 is 75%, the energy storage battery 12 stops discharging. In this process, even if the remaining capacity of the energy storage battery 12 is less than 75%, the bidirectional dc-dc conversion unit 13 does not charge the energy storage battery 12 any more.
More specifically, as an example, when the new energy real-time generated power is less than or equal to K2 times of the load real-time consumed power, and the new energy daily average generated power is greater than K1 times of the load daily average consumed power, and when the load real-time consumed power is less than the preset output power of the energy storage battery 12, if N =1, the output power of the bidirectional dc-dc converting unit 13 is zero (at this time, the preset value is zero). If N is an integer greater than or equal to 2, the N groups of bidirectional dc-to-dc units 13 output power to the load alternately in a time-sharing manner, in this embodiment, the remaining power of the energy storage battery 12 corresponding to each bidirectional dc-to-dc unit 13 is calculated at regular time, M groups of bidirectional dc-to-dc units 13 with larger remaining power of the energy storage battery 12 are selected to output power, the remaining bidirectional dc-to-dc units 13 output power is zero, the output power of each bidirectional dc-to-dc unit 13 is 1/N of the preset output power of the energy storage battery 12, and M is an integer greater than or equal to 1 and smaller than N. In practical use, each energy storage battery 12 may also be discharged to a first set value in sequence, so as to realize that the bidirectional dc-to-dc unit 13 outputs power alternately; or calculating the residual capacity of the energy storage battery 12, and sequentially discharging the energy storage batteries 12 with the residual capacity greater than the second set value to the first set value so as to realize the alternate output power of the bidirectional direct current-to-direct current unit 13; the present embodiment is not limited thereto.
More specifically, taking N equal to 4 as an example; as an example, when the real-time power consumption of the load is greater than 0.5 times of the preset output power of the energy storage battery 12, 2 bidirectional dc-to-dc units 13 output power to the load, the output power of each bidirectional dc-to-dc unit 13 is 1/4 of the preset output power of the energy storage battery 12, the total output power of 2 bidirectional dc-to-dc units 13 is 1/2 of the preset output power of the energy storage battery 12 (at this time, the preset value is 1/2 of the preset output power of the energy storage battery 12), and the output is switched in 4 bidirectional dc-to-dc units 13, at this time, M is equal to 2; when the real-time power consumption of the load is greater than 0.25 times of the preset output power of the energy storage battery 12, 1 bidirectional direct current to direct current conversion unit 13 outputs power to the load, the output power is 1/4 of the preset output power of the energy storage battery 12 (the total output power is also 1/4 of the preset output power of the energy storage battery 12, at this time, the preset value is 1/4 of the preset output power of the energy storage battery 12), and the output is switched in 4 bidirectional direct current to direct current conversion units 13 in time division, at this time, M is equal to 1. By analogy, the output power of the bidirectional direct current to direct current unit 13 with larger residual capacity of the energy storage battery 12 is preferably selected, so that the new energy output power is ensured to be provided for the load to the maximum extent.
In practical use, the fixed power output by the bidirectional dc-dc converting unit 13 can be set according to needs, and is not limited to this embodiment.
32 When the real-time generating power of the new energy is less than or equal to K2 times of load real-time consumed power and the daily average generating power of the new energy is less than K1 times of load daily average consumed power, the output power of the bidirectional direct current to direct current unit 13 changes according to the real-time generating power of the new energy.
It should be noted that the output power of the bidirectional dc-to-dc unit 13 is positively or negatively correlated with the real-time generated power of the new energy, and is determined according to the topology structure of the actual multi-energy complementary dc microgrid 1. In this embodiment, in the topology structure of fig. 1, the output power of the bidirectional dc-dc conversion unit 13 is positively correlated with the real-time generated power of the new energy; on the topological structure of fig. 2, the output power of the bidirectional dc-dc conversion unit 13 is inversely related to the real-time generated power of the new energy; this is not repeated herein.
Specifically, as an example, on the basis of the topology structure in fig. 1, when the new energy real-time power generation power is less than or equal to K2 times of load real-time power consumption, and the new energy daily average power generation power is less than K1 times of load daily average power consumption, the new energy power generation device 11 outputs power to the load through the bidirectional dc-dc converting unit 13, and the output power of the bidirectional dc-dc converting unit 13 is K3 times of new energy real-time power generation power.
More specifically, K3 is a real number greater than 0, and the value range thereof can be set as required; in this embodiment, K3 is a real number slightly greater than 1, including but not limited to 1.2, 1.3, and preferably 1.1.
33 When the real-time power generation power of the new energy is greater than K2 times of the real-time power consumption of the load, the output power of the bidirectional dc-to-dc unit 13 changes according to the real-time power consumption of the load.
It should be noted that the output power of the bidirectional dc-to-dc unit 13 is positively or negatively correlated with the real-time power consumption of the load, and is determined according to the topology structure of the actual multifunctional complementary dc microgrid 1. In this embodiment, in the topology of fig. 1, the output power of the bidirectional dc-dc conversion unit 13 is positively correlated with the real-time power consumption of the load; in the topology of fig. 2, the output power of the bidirectional dc-dc unit 13 is inversely related to the real-time power consumption of the load; this is not repeated herein.
Specifically, in this embodiment, when the real-time generated power of the new energy is greater than K2 times of the real-time consumed power of the load, the bidirectional dc-to-dc unit 13 outputs power to the load, and the output power of the bidirectional dc-to-dc unit 13 is K4 times of the real-time consumed power of the load.
More specifically, as an example, based on the topology of fig. 1, K4 is a real number greater than 0, and the value range thereof can be set as needed; in this embodiment, K4 is a real number slightly less than 1, including but not limited to 0.8, 0.7, and preferably 0.9.
In the peak period of electricity usage:
41 When the real-time power generation power of the new energy is greater than the preset power generation power, if the real-time power consumption of the load is greater than the rated output power of the bidirectional dc-dc converting unit 13, the output power of the bidirectional dc-dc converting unit 13 is the sum of the preset output power of the energy storage battery 12 and the real-time power generation power of the new energy; if the real-time power consumption of the load is less than the minimum output power of the bidirectional dc-to-dc unit 13, the output power of the bidirectional dc-to-dc unit 13 is the minimum output power or the output power is zero; otherwise, the output power of the bidirectional dc-dc conversion unit 13 is K5 times of the real-time power consumption of the load.
It should be noted that the output power of the bidirectional dc-to-dc unit 13 is positively or negatively correlated with the real-time power consumption of the load, and is determined according to the topology structure of the actual multifunctional complementary dc microgrid 1. In this embodiment, in the topology of fig. 1, the output power of the bidirectional dc-to-dc unit 13 is positively correlated with the real-time consumption power of the load, that is, K5 is a real number greater than 0, and as an example, K5 is a real number slightly smaller than 1, including but not limited to 0.8, 0.7, and preferably 0.9; in the topology of fig. 2, the output power of the bidirectional dc-dc conversion unit 13 is inversely related to the real-time power consumption of the load; this is not repeated herein.
Specifically, when the real-time power consumption of the load is greater than the rated output power of the bidirectional dc-to-dc unit 13, all the generated power of the new energy power generation device 11 is output, and the output power of the energy storage battery 12 is limited to the preset output power, so as to limit the maximum output power of the bidirectional dc-to-dc unit 13.
Specifically, when the load real-time consumption power is between the minimum output power of the bidirectional dc-to-dc unit 13 and the rated output power of the bidirectional dc-to-dc unit 13, the output power of the bidirectional dc-to-dc unit 13 is K5 times of the load real-time consumption power.
Specifically, in this embodiment, when the real-time generated power of the new energy is greater than the preset generated power, if the remaining power of any one of the energy storage cells 12 is less than the first preset power, the output power of the corresponding one of the bidirectional dc-to-dc units 13 is zero. At this time, the power generated by the new energy power generation device 11 is used for charging the energy storage battery 12, so as to prevent the energy storage battery 12 from deeply discharging, and further improve the service life of the energy storage battery 12.
Specifically, as an example, for the topology structure in fig. 1, when the real-time generated power of the new energy is greater than the preset generated power, if the voltage of the energy storage battery 12 reaches the preset voltage, the mode of charging the energy storage battery 12 by the control unit in the new energy power generation apparatus 11 is switched from the maximum power tracking mode or the uniform charging mode to the floating charging mode.
42 When the real-time generated power of the new energy is less than or equal to a preset generated power, if the real-time consumed power of the load is greater than a preset output power of the energy storage battery 12, the output power of the bidirectional dc-to-dc unit 13 is the preset output power of the energy storage battery 12; if the real-time power consumption of the load is less than or equal to the preset output power of the energy storage battery 12, the output power of the bidirectional dc-to-dc unit 13 is zero or the output power is alternately output.
Specifically, when the real-time power generation power of the new energy is less than or equal to the preset power generation power and the real-time power consumption of the load is greater than the preset output power of the energy storage battery 12, if the remaining power of any one of the energy storage batteries 12 is less than the first preset power, the output power of the bidirectional dc-to-dc unit 13 corresponding to the path is zero, so as to avoid deep discharge of the energy storage battery 12, and further improve the service life of the energy storage battery 12.
Specifically, as an example, when the real-time generated power of the new energy is less than or equal to a preset generated power, and when the real-time consumed power of the load is less than the preset output power of the energy storage battery 12, if N =1, the output power of the bidirectional dc-dc converting unit 13 is zero. If N is an integer greater than or equal to 2, the N groups of bidirectional dc-dc converting units 13 output power to the load alternately in a time-sharing manner. The principle of the timing alternating operation is the same as the wave-level period, and is not described herein.
As shown in fig. 1 and fig. 2, the multi-energy complementary dc microgrid 1 of the present invention further includes a dc-ac unit 14, a first ac contactor 15, a second ac contactor 16, and an ac electric device 17. The input end of the dc-ac conversion unit 14 is connected to the dc BUS, and is configured to convert the BUS voltage into an ac voltage; the first ac contactor 15 is connected between the output end of the dc-to-ac unit 14 and the power input end of the ac electric device 17; the second AC contactor 16 is connected between the AC power grid AC and the power input of the AC consumer 17. When the daily average power generation amount of the new energy is smaller than the load daily average power consumption of K1 times and the alternating current power grid AC is normal, the alternating current power grid AC supplies power to the alternating current electric equipment 17; otherwise, the dc BUS supplies power to the ac consumer 17 via the dc-to-ac unit 14. The ac consumers include, but are not limited to, air conditioners, and further, the air conditioners are used for controlling the temperature in the base station power supply cabinet.
Specifically, when the AC power grid AC is normal, if the daily average power generation amount of the new energy is greater than K1 times of the daily average consumed power of the load, the first AC contactor 15 is controlled to be turned on, the second AC contactor 16 is turned off, and at this time, the dc BUS is converted into an AC voltage by the dc-to-AC unit 14, and supplies power to the AC electric device 17. The direct current BUS supplies power through the alternating current-to-direct current unit 18, the new energy power generation device 11, the energy storage battery 12 and the bidirectional direct current-to-direct current unit 13. And if the daily average power generation amount of the new energy is smaller than K1 times of the daily average consumed power of the load, controlling the first alternating current contactor 15 to be switched off, and controlling the second alternating current contactor 16 to be switched on, wherein at the moment, the alternating current power grid AC supplies power to the alternating current electric equipment 17.
Specifically, when the AC grid AC is abnormal, the first AC contactor 15 is controlled to be closed, the second AC contactor 16 is controlled to be opened, and at this time, the dc BUS is converted into an AC voltage by the dc-to-AC unit 14, and supplies power to the AC electric device 17. The direct current BUS BUS supplies power through the new energy power generation device 11, the energy storage battery 12 and the bidirectional direct current-to-direct current unit 13.
In summary, the present invention provides a power energy control method for a multi-energy complementary dc microgrid, including: in the trough period of power utilization, when the daily average generated power of the new energy is larger than the daily average consumed power of the load which is K1 times, the bidirectional direct current-to-direct current unit outputs power to the load; when the daily average generating power of the new energy is smaller than the load daily average consumed power which is K1 times, the bidirectional direct current-to-direct current unit charges the energy storage battery; in the wave level period of power utilization, the bidirectional direct current-to-direct current unit outputs power to a load; in the peak time period of power utilization, the bidirectional direct current-to-direct current unit outputs power to a load; wherein K1 is a real number greater than 0. The power energy control method of the multi-energy complementary direct-current micro-grid can maintain the power energy balance in the direct-current micro-grid, can respond to the peak regulation requirement of a power grid, and further reduces the power consumption cost; meanwhile, new energy is utilized to the maximum extent, so that the total electric quantity consumed by drawing from the power grid is greatly reduced, and the carbon emission is reduced. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (11)
1. A power energy control method for a multi-energy complementary direct-current microgrid is characterized by at least comprising an alternating-current to direct-current conversion unit and at least one new energy power generation device, an energy storage battery and a bidirectional direct-current to direct-current conversion unit, and comprises the following steps:
in the trough period of power utilization, when the daily average generated power of the new energy is larger than the daily average consumed power of the load which is K1 times, the bidirectional direct current-to-direct current unit outputs power to the load; when the daily average generating power of the new energy is smaller than the load daily average consumed power which is K1 times, the bidirectional direct current-to-direct current unit charges the energy storage battery;
in the wave level period of power utilization, the bidirectional direct current-to-direct current unit outputs power to a load;
in the peak time period of power utilization, the bidirectional direct current-to-direct current unit outputs power to a load;
wherein K1 is a real number greater than 0.
2. The power energy control method of the multi-energy complementary direct current microgrid of claim 1, characterized in that: the method for judging the size relation between the new energy daily average generating power and the K1 times load daily average consumed power comprises the following steps:
if the load daily accumulated consumed electric quantity of the new energy is larger than K1 times of the daily accumulated generated electric quantity of the new energy, judging the load daily average consumed power of the new energy, wherein the daily average generated power of the new energy is larger than K1 times of the daily average consumed power of the load; and otherwise, judging the load daily average consumed power of the new energy source with daily average generated power less than K1 times.
3. The power energy control method of the multi-energy complementary direct current microgrid of claim 1, characterized in that: the method for judging the magnitude relation between the daily average generating power of the new energy and the daily average consumed power of K1 times of load comprises the following steps:
in the peak time period and the wave level time period of power utilization, when the real-time generated power of the new energy is larger than the real-time consumed power of a load with K2 times, the timer is self-added;
if the timing result of the timer is more than or equal to the preset time, judging the load daily average consumed power of the new energy, wherein the daily average generated power of the new energy is more than K1 times; otherwise, judging the daily average power consumption of the load with the daily average power generation power of the new energy less than K1 times;
wherein K2 is a real number greater than 0.
4. The power energy control method of the multi-energy complementary direct current microgrid according to any one of claims 1 to 3, characterized in that: during the trough period of electricity usage:
when the daily average power generation power of the new energy is larger than K1 times of the daily average power consumption of the load, if the residual electric quantity of the energy storage battery is larger than a first set electric quantity, the bidirectional direct current-to-direct current unit outputs power to the load, and the output power of the bidirectional direct current-to-direct current unit is the preset output power of the energy storage battery;
when the daily average generated power of the new energy is smaller than K1 times of the daily average consumed power of the load, if the residual electric quantity of the energy storage battery is smaller than the electric quantity upper limit, the bidirectional direct current-to-direct current unit charges the energy storage battery.
5. The power energy control method of the multi-energy complementary direct current microgrid according to any one of claims 1 to 3, characterized in that: during the power-using wave-level period:
when the real-time generating power of the new energy is less than or equal to K2 times of load real-time consumed power and the daily average generating power of the new energy is greater than K1 times of load daily average consumed power, the output power of the bidirectional direct current-to-direct current unit is a preset value;
when the real-time power generation power of the new energy is less than or equal to K2 times of load real-time consumed power and the daily average power generation power of the new energy is less than K1 times of load daily average consumed power, the output power of the bidirectional direct current-to-direct current unit changes according to the real-time power generation power of the new energy;
when the real-time power generation power of the new energy is larger than K2 times of the real-time power consumption of the load, the output power of the bidirectional direct current to direct current conversion unit changes according to the real-time power consumption of the load;
wherein K2 is a real number greater than 0.
6. The power energy control method of the multi-energy complementary direct current microgrid of claim 5, characterized in that: during the power-using wave-level period:
when the real-time power generation power of the new energy is less than or equal to K2 times of the real-time power consumption of the load, and the daily average power generation power of the new energy is greater than K1 times of the daily average power consumption of the load, the energy storage battery outputs power to the load through the bidirectional direct current-to-direct current unit; at this time, if the real-time consumed power of the load is greater than the preset output power of the energy storage battery, the output power of the bidirectional direct current-to-direct current unit is the preset output power of the energy storage battery; if the real-time consumed power of the load is less than or equal to the preset output power of the energy storage battery, the output power of the bidirectional direct current-to-direct current unit is zero or the output power is alternately output;
when the new energy real-time power generation power is less than or equal to K2 times of load real-time power consumption and the new energy daily average power generation power is less than K1 times of load daily average power consumption, the new energy power generation device outputs power to the load through the bidirectional direct current-to-direct current unit, and the output power of the bidirectional direct current-to-direct current unit is K3 times of new energy real-time power generation power;
when the real-time power generation power of the new energy is larger than K2 times of the real-time power consumption of the load, the bidirectional direct current to direct current conversion unit outputs power to the load, and the output power of the bidirectional direct current to direct current conversion unit is K4 times of the real-time power consumption of the load;
wherein, K3 and K4 are real numbers larger than 0.
7. The power energy control method of the multi-energy complementary direct current microgrid of claim 6, characterized in that: when the real-time generating power of the new energy is less than or equal to K2 times of the real-time consumed power of the load, and the daily average generating power of the new energy is greater than K1 times of the daily average consumed power of the load, if the residual electric quantity of the energy storage battery is greater than a second set electric quantity, the energy storage battery outputs power to the load through the bidirectional direct current-to-direct current unit; and if the residual electric quantity of the energy storage battery is less than or equal to a second set electric quantity, the output power of the bidirectional direct current-to-direct current unit is zero.
8. The power energy control method of the multi-energy complementary direct current microgrid of claim 1, characterized in that: in the peak period of electricity usage:
when the real-time power generation power of the new energy is larger than the preset power generation power, if the real-time power consumption of the load is larger than the rated output power of the bidirectional direct current to direct current unit, the output power of the bidirectional direct current to direct current unit is the sum of the preset output power of the energy storage battery and the real-time power generation power of the new energy; if the real-time consumed power of the load is smaller than the minimum output power of the bidirectional direct current to direct current unit, the output power of the bidirectional direct current to direct current unit is the minimum output power or the output power is zero; otherwise, the output power of the bidirectional direct current-to-direct current unit is K5 times of the real-time consumed power of the load;
when the real-time power generation power of the new energy is smaller than or equal to the preset power generation power, if the real-time power consumption of the load is larger than the preset output power of the energy storage battery, the output power of the bidirectional direct current-to-direct current unit is the preset output power of the energy storage battery; if the real-time consumed power of the load is less than or equal to the preset output power of the energy storage battery, the output power of the bidirectional direct current-to-direct current unit is zero or the output power is alternately output;
wherein K5 is a real number.
9. The power energy control method of the multi-energy complementary direct current microgrid of claim 8, characterized in that: when the real-time power generation power of the new energy is larger than the preset power generation power, or the real-time power generation power of the new energy is smaller than or equal to the preset power generation power and the real-time power consumption of the load is larger than the preset output power of the energy storage battery, if the residual electric quantity of any one path of energy storage battery is smaller than a first preset electric quantity, the output power of the corresponding path of bidirectional direct current-to-direct current unit is zero.
10. The power energy control method of the multi-energy complementary direct current microgrid according to any one of claims 6 to 9, characterized in that: the output power of the bidirectional direct current-to-direct current unit is zero or the alternate output power comprises: the bidirectional direct current-to-direct current units are arranged into N groups, and if N =1, the output power of the bidirectional direct current-to-direct current units is zero; if N is an integer greater than or equal to 2, the N groups of bidirectional direct current to direct current units alternately output power to the load in a time-sharing manner, at the moment, the residual electric quantity of the energy storage battery corresponding to each bidirectional direct current to direct current unit is calculated regularly, M groups of bidirectional direct current to direct current unit output power with larger residual electric quantity of the energy storage battery are selected, the output power of each bidirectional direct current to direct current unit is 1/N of the preset output power of the energy storage battery, and M is an integer greater than or equal to 1 and smaller than N.
11. The power energy control method of the multi-energy complementary direct current microgrid according to any one of claims 1 to 3, characterized in that: the multi-energy complementary direct-current micro-grid is also provided with alternating-current electric equipment, and when the daily average generated energy of the new energy is smaller than the daily average consumed power of a load which is K1 times and the alternating-current power grid is normal, the alternating-current power grid supplies power to the alternating-current electric equipment; otherwise, the direct current bus supplies power to the alternating current electric equipment through the direct current-to-alternating current unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211480675.1A CN115864484B (en) | 2022-11-23 | 2022-11-23 | Power energy control method for multi-energy complementary direct current micro-grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211480675.1A CN115864484B (en) | 2022-11-23 | 2022-11-23 | Power energy control method for multi-energy complementary direct current micro-grid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115864484A true CN115864484A (en) | 2023-03-28 |
| CN115864484B CN115864484B (en) | 2024-04-09 |
Family
ID=85665682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211480675.1A Active CN115864484B (en) | 2022-11-23 | 2022-11-23 | Power energy control method for multi-energy complementary direct current micro-grid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115864484B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110291479A1 (en) * | 2010-06-01 | 2011-12-01 | Samsung Sdi Co., Ltd. | Energy storage system and method of controlling the same |
| CN104518561A (en) * | 2013-09-30 | 2015-04-15 | 北京光景照明设计有限公司 | Civil direct current system and direct current power supply method |
| CN105680771A (en) * | 2016-03-25 | 2016-06-15 | 南通大学 | Wind-solar complementary generation system and control method |
| CN109193757A (en) * | 2018-09-05 | 2019-01-11 | 国网青海省电力公司 | The energy control method and control system of light storage charging system |
| CN111738502A (en) * | 2020-06-15 | 2020-10-02 | 上海交通大学 | Multi-energy complementary system demand response operation optimization method for promoting surplus wind power consumption |
| CN114884116A (en) * | 2022-06-07 | 2022-08-09 | 国网湖北综合能源服务有限公司 | Power circuit, new energy control system and energy coordination method |
| CN115352311A (en) * | 2022-08-16 | 2022-11-18 | 一汽奔腾轿车有限公司 | Energy management method for optical storage charging and discharging battery changing system |
-
2022
- 2022-11-23 CN CN202211480675.1A patent/CN115864484B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110291479A1 (en) * | 2010-06-01 | 2011-12-01 | Samsung Sdi Co., Ltd. | Energy storage system and method of controlling the same |
| CN104518561A (en) * | 2013-09-30 | 2015-04-15 | 北京光景照明设计有限公司 | Civil direct current system and direct current power supply method |
| CN105680771A (en) * | 2016-03-25 | 2016-06-15 | 南通大学 | Wind-solar complementary generation system and control method |
| CN109193757A (en) * | 2018-09-05 | 2019-01-11 | 国网青海省电力公司 | The energy control method and control system of light storage charging system |
| CN111738502A (en) * | 2020-06-15 | 2020-10-02 | 上海交通大学 | Multi-energy complementary system demand response operation optimization method for promoting surplus wind power consumption |
| CN114884116A (en) * | 2022-06-07 | 2022-08-09 | 国网湖北综合能源服务有限公司 | Power circuit, new energy control system and energy coordination method |
| CN115352311A (en) * | 2022-08-16 | 2022-11-18 | 一汽奔腾轿车有限公司 | Energy management method for optical storage charging and discharging battery changing system |
Non-Patent Citations (1)
| Title |
|---|
| 胡津源 等: "多能互补新能源电站协调控制策略研究", 电工电气, no. 09, 15 September 2020 (2020-09-15), pages 28 - 32 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115864484B (en) | 2024-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3206276B1 (en) | Energy storage system and management method thereof | |
| CN106487036B (en) | A kind of independent photovoltaic dragging system capacity collocation method based on multi-objective optimization algorithm | |
| EP3537553A1 (en) | Method and apparatus for storing and depleting energy | |
| EP2582013A2 (en) | Energy storage system and control method | |
| WO2014071314A9 (en) | Modular microgrid unit and method of use | |
| JP5526043B2 (en) | DC power supply system | |
| CN202134924U (en) | Structure of multifunctional system of solar power and self use connected grid | |
| CN112751357B (en) | Photovoltaic energy storage system and control method thereof | |
| CN114844030B (en) | DC micro-grid bus management method and energy supply system | |
| CN102931683A (en) | Wind-solar direct current microgrid grid-connection control method based on substation typical daily load curve | |
| US20230294544A1 (en) | Method of Controlling of Battery Energy Storage System of Power System with High Dynamic Loads | |
| Li et al. | Energy management system for DC microgrids considering battery degradation | |
| CN112510756A (en) | Micro-grid optical storage and charging coordinated operation method and system based on power level | |
| CN111327078A (en) | Household energy scheduling method, energy management module and household energy system | |
| CN115360736A (en) | Energy storage system and energy storage control method | |
| CN102931676B (en) | Structure of solar power grid-connected self-use multifunctional system | |
| di Piazza et al. | Electrical storage integration into a DC nanogrid testbed for smart home applications | |
| CN112510768A (en) | Power supply system | |
| CN116455045A (en) | Base station light reserve power supply guarantee system based on lead-acid storage battery | |
| CN115864484B (en) | Power energy control method for multi-energy complementary direct current micro-grid | |
| CN116094033A (en) | Photovoltaic energy storage complementary system for flexible disturbance rejection adjustment of power grid | |
| CN110224389B (en) | Direct current micro-grid system based on self-discipline floating voltage operation strategy | |
| RU2726735C1 (en) | Self-contained power supply system with combined energy storage unit | |
| CN113675856A (en) | Regulation and control method for participation of elastic load unit in demand response and elastic load unit | |
| Xu et al. | Control Strategy of DC nanogrid Based on hierarchical bus voltage control and droop control |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |