CN114759659B - Power supply system and method using energy storage system as uninterruptible power supply - Google Patents
Power supply system and method using energy storage system as uninterruptible power supply Download PDFInfo
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- CN114759659B CN114759659B CN202210270077.5A CN202210270077A CN114759659B CN 114759659 B CN114759659 B CN 114759659B CN 202210270077 A CN202210270077 A CN 202210270077A CN 114759659 B CN114759659 B CN 114759659B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- Supply And Distribution Of Alternating Current (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a power supply system and a method using an energy storage system as an uninterruptible power supply. The output end of the first energy storage converter is connected with the input end of the energy storage system and the input end of the second energy storage converter respectively, and the output end of the energy storage system is connected with the input end of the second energy storage converter. The energy storage system is respectively in communication connection with the first energy storage converter and the second energy storage converter. The energy storage system and the first energy storage converter externally connected with the power grid are used as power supply sources of the second energy storage converter, a plurality of charge state intervals are divided through the ratio of reserved electric quantity to total electric quantity, the power output by the energy storage system is determined according to the current charge state, and the energy of the energy storage system is subjected to multistage regulation and control, so that the energy storage system stores enough electric quantity at any time, and the output power of the system to a load is ensured to be stable enough.
Description
Technical Field
The invention relates to the field of energy storage batteries, in particular to a power supply system and a method using an energy storage system as an uninterruptible power supply.
Background
With the increasing demand of electricity for residents, various novel power devices such as intelligent floor heating, intelligent projection and the like are becoming more popular in residents. Daily electricity for each resident and power at peak are increasing. However, when the existing energy storage system is directly connected into an alternating current bus for use, the situation that enough electricity consumption is difficult to guarantee at any time occurs, so that the output power of the system to a load is not stable enough, the system can be interrupted, and the risks of shutdown of load equipment and data loss are caused.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the power supply system and the method using the energy storage system as the uninterrupted power supply are provided, so that the energy storage system stores enough electric quantity at any time, and the output power of the system to a load is ensured to be stable enough.
In order to solve the problems, the invention adopts the following scheme:
A power supply system using an energy storage system as an uninterruptible power supply comprises the energy storage system, a first energy storage converter and a second energy storage converter;
the output end of the first energy storage converter is connected with the input end of the energy storage system and the input end of the second energy storage converter respectively, and the output end of the energy storage system is connected with the input end of the second energy storage converter;
the energy storage system is respectively in communication connection with the first energy storage converter and the second energy storage converter;
the input end of the first energy storage converter is used for being externally connected with a power grid, and the output end of the second energy storage converter is used for being externally connected with a load.
In order to solve the above problems, another scheme adopted by the invention is as follows:
a power supply method using an energy storage system as an uninterruptible power supply is applied to the power supply system using the energy storage system as the uninterruptible power supply, and comprises the following steps:
s1, calculating the ratio of reserved electric quantity to total electric quantity of an energy storage system and taking the ratio as a reserved ratio;
s2, setting more than two charge state intervals according to the reserved ratio, and setting a corresponding power supply strategy for each charge state interval;
and S3, controlling the energy storage system and a power grid to supply power to the second energy storage converter by using the corresponding power supply strategy according to the state-of-charge interval in which the current state of charge of the energy storage system is.
In summary, the beneficial effects of the invention are as follows: the utility model provides a use energy storage system as uninterrupted power source's power supply system and method, regard energy storage system and the first energy storage converter of external electric wire netting as the power supply source of second energy storage converter jointly, divide a plurality of state of charge intervals through the ratio of reserved electric quantity to total electric quantity, and decide the power size that energy storage system output according to current state of charge, carry out multistage regulation and control to energy storage system's energy for energy storage system has sufficient electric quantity constantly, guarantee that the system gives the output of load stable enough.
Drawings
FIG. 1 is a system block diagram of a power supply system using an energy storage system as an uninterruptible power supply in accordance with an embodiment of the present invention;
Fig. 2 is a schematic diagram illustrating steps of a power supply method using an energy storage system as an uninterruptible power supply according to an embodiment of the invention.
Description of the reference numerals:
1. a power grid; 2. an energy storage system; 3. a first energy storage converter; 4. a second energy storage converter; 5. and (3) loading.
Detailed Description
In order to describe the technical contents, the achieved objects and effects of the present invention in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.
Referring to fig. 1, a power supply system using an energy storage system as an uninterruptible power supply includes an energy storage system 2, a first energy storage converter 3 and a second energy storage converter 4;
The output end of the first energy storage converter 3 is respectively connected with the input end of the energy storage system 2 and the input end of the second energy storage converter 4, and the output end of the energy storage system 2 is connected with the input end of the second energy storage converter 4;
the energy storage system 2 is respectively in communication connection with the first energy storage converter 3 and the second energy storage converter 4;
The input end of the first energy storage converter 3 is used for being externally connected with the power grid 1, and the output end of the second energy storage converter 4 is used for being externally connected with the load 5.
From the above description, the beneficial effects of the invention are as follows: the energy storage system 2 and the first energy storage converter 3 externally connected with the power grid 1 are jointly used as a power supply source of the second energy storage converter 4, and the energy storage system 2 is powered through the first energy storage converter 3, so that enough electric quantity exists in the energy storage system 2 at any time, and the enough stability of the output power of the system to the load 5 is ensured.
Referring to fig. 2, a power supply method using an energy storage system as an uninterruptible power supply is applied to the above power supply system using an energy storage system 2 as an uninterruptible power supply, and includes the following steps:
s1, calculating the ratio of reserved electric quantity to total electric quantity of the energy storage system 2 and taking the ratio as a reserved ratio;
s2, setting more than two charge state intervals according to the reserved ratio, and setting a corresponding power supply strategy for each charge state interval;
And S3, controlling the energy storage system 2 and the power grid 1 to supply power to the second energy storage converter 4 by using the corresponding power supply strategy according to the state-of-charge interval in which the current state of charge of the energy storage system 2 is.
From the above description, the beneficial effects of the invention are as follows: the energy storage system 2 and the first energy storage converter 3 externally connected with the power grid 1 are jointly used as a power supply source of the second energy storage converter 4, a plurality of charge state intervals are divided through the ratio of reserved electric quantity to total electric quantity, the power output by the energy storage system 2 is determined according to the current charge state, the energy of the energy storage system 2 is subjected to multistage regulation and control, enough electric quantity exists in the energy storage system 2 at any time, and the output power of the system to the load 5 is ensured to be stable enough.
Further, before the step S1, the method further includes:
s0, calculating the product of the full load power of the load 5 and the preset working time required to be kept by the load 5 when the power grid 1 is powered off, and taking the product as reserved electric quantity.
As can be seen from the above description, the reserved electric quantity is obtained by combining the full load power of the load 5 and the preset working time period that the load 5 needs to keep when the power grid 1 is powered off, that is, the electric quantity of the energy storage system 2 can be ensured to be always kept at the electric quantity capable of meeting the most basic power consumption requirement of the load 5, and the load 5 is given enough stable output power.
Further, the setting a plurality of state of charge intervals according to the reservation ratio specifically includes:
setting a first state of charge interval to be a state of charge greater than the sum of the reserved ratio plus a first increment;
Setting a second state of charge interval to be a state of charge less than or equal to the sum of the reservation ratio plus the first increment and greater than the sum of the reservation ratio plus a second increment, wherein the first increment is greater than the second increment;
Setting a third state of charge interval to be a state of charge greater than the reserved ratio and less than or equal to the reserved ratio plus the sum of the second increment;
and setting the fourth charge state interval as the charge state smaller than or equal to the reservation ratio.
As can be seen from the above description, the reserved ratio is mainly used, and the first state of charge interval, the second state of charge interval, the third state of charge interval and the fourth state of charge interval are set in combination with the first increment, the second increment and the reserved ratio, so that sufficient fault-tolerant space is ensured for the electric energy margin of the energy storage system 2, and the power supply output of the system is more stable.
Further, the setting of the corresponding power supply policy for each state of charge interval specifically includes:
s21, if the current state of charge is in the first state of charge interval, controlling the energy storage system 2 to output power accounting for a first percentage value of the required power to the second energy storage converter 4, and providing the power with the remaining percentage by the power grid 1;
S22, if the current state of charge is in the second state of charge interval, controlling the energy storage system 2 to output power accounting for a second percentage value of the required power to the second energy storage converter 4, and providing the power with the remaining percentage by the power grid 1;
s23, if the current state of charge is in the third state of charge interval, independently outputting power to the second energy storage converter 4 by the power grid 1;
and S24, if the current state of charge is in the fourth state of charge interval, outputting power to the second energy storage converter 4 by the power grid 1, and simultaneously supplying power to the energy storage system 2 by the residual output power until the real-time state of charge of the energy storage system 2 is in the third state of charge interval.
As can be seen from the above description, corresponding power supply strategies are implemented corresponding to each state of charge interval, so that the power grid 1 is closely matched with the power supply output of the energy storage system 2 via the power supply output of the first energy storage converter 3, thereby realizing accurate control of the electric quantity of the energy storage system 2 and ensuring that the system has reliable and stable power supply output.
Further, the step S23 further includes:
Judging whether the full output power of the first energy storage converter 3 is smaller than the required power of the second energy storage converter 4, if yes, controlling the output power of the energy storage system 2 to the second energy storage converter 4 so as to complement the difference between the full output power of the first energy storage converter 3 and the required power of the second energy storage converter 4.
From the above description, when the amount of electricity required by the currently connected load 5 exceeds the full output power of the first energy storage converter 3, that is, the energy storage system 2 supplements the exceeding part when the electricity is in the peak period of electricity consumption, so that the power supply of the load 5 is first satisfied, and the risks of outage and data loss of equipment of the load 5 are reduced.
Further, the first increment is 20%, the second increment is 10%, the first percentage value is 80%, and the second percentage value is 50%.
From the above description, the first increment is 20% and the second increment is 10%, and the fault tolerance is set aside based on the reserved electric quantity, so as to ensure that the electric quantity of the system meets the actual basic power supply requirement. When the power of the energy storage system 2 is high, a higher percentage of power output is provided to the load 5, and otherwise the output is reduced to maintain the power of the energy storage system 2.
Further, the step S3 further includes:
and S4, charging the energy storage system 2 through the first energy storage converter 3 in the valley period.
As can be seen from the above description, the energy storage system 2 is charged through the first energy storage converter 3 in the valley period, so that the purposes of peak clipping, valley filling and obtaining a gap can be achieved.
Further, before the step S1, the method further includes:
The first energy storage converter 3 is set to be in a constant power mode, and the second energy storage converter 4 is set to be in a constant voltage output mode.
As can be seen from the above description, the first energy storage converter 3 is set to a constant power mode, the second energy storage converter 4 is set to a constant voltage output mode, which corresponds to off-grid operation, and the output power can be adjusted according to the actual requirement of the load 5.
Further, the step S3 further includes:
And S5, controlling the energy storage system 2 to absorb the input electric energy on the first energy storage converter 3 when the load 5 is suddenly interrupted.
From the above description, the energy storage system 2 is able to absorb the input electrical energy at the first energy storage converter 3, thereby preventing the system from being able to absorb energy when the load 5 is interrupted.
The power supply system and the method using the energy storage system as the uninterruptible power supply can be applied to the scene of power supply of the load 5, and the following description is made by a specific embodiment:
heretofore, it has been worth noting that there are three problems with existing energy storage architectures:
firstly, when the existing energy storage architecture is used for setting peak clipping and valley filling in a time-division manner, if the condition of sudden power failure of a load occurs, the situation that the energy storage power cannot be recovered and flows back to a power grid occurs;
Secondly, when the existing energy storage architecture is at a power grid fault terminal and needs to perform on-grid and off-grid switching, uninterrupted switching cannot be achieved, so that load equipment is stopped, and data are lost;
thirdly, the existing energy storage architecture cannot ensure enough electric quantity at any time, and the condition of insufficient power supply output is easy to occur after the power grid is separated, so that load equipment is stopped, and data are lost.
The power supply system and the method of the present embodiment are used for solving the above three problems.
Referring to fig. 1, a first embodiment of the present invention is as follows:
A power supply system using an energy storage system as an uninterruptible power supply, as shown in fig. 1, includes an energy storage system 2, a first energy storage converter 3, and a second energy storage converter 4. The output end of the first energy storage converter 3 is connected with the input end of the energy storage system 2 and the input end of the second energy storage converter 4 respectively, and the output end of the energy storage system 2 is connected with the input end of the second energy storage converter 4. The energy storage system 2 is in communication with a first energy storage converter 3 and a second energy storage converter 4, respectively. The input end of the first energy storage converter 3 is used for being externally connected with the power grid 1, and the output end of the second energy storage converter 4 is used for being externally connected with the load 5.
In the present embodiment, the reason why the power supply system can solve the above three problems is that:
First, in the present embodiment, the power supply output of the power grid 1 is not directly output to the load 5, but flows into the second energy storage converter 4 together with the power supply output of the energy storage system 2 through the first energy storage converter 3, and is output to the load 5 by the second energy storage converter 4. When the load 5 is suddenly interrupted, the second energy storage converter 4 can maintain the voltage at the load 5 side by utilizing the characteristic of a constant voltage source of the second energy storage converter, and the power is automatically reduced, which is equivalent to off-grid operation, so that the power output by the second energy storage converter 4 is ensured not to flow back to the power grid 1, meanwhile, the energy storage system 2 can absorb electric energy, and the redundant electric energy input by the first energy storage converter 3 can be absorbed by energy storage, so that the condition that the energy cannot be absorbed is avoided.
Then, in the present embodiment, when the grid 1 fails, the first energy storage converter 3 has no power output. However, the battery system of the energy storage system 2 can always keep electric energy output, and the condition that the power is supplied by the power grid 1 and the energy storage system 2 together can be converted into that the power is supplied by the energy storage system 2 alone, so that the output power of the load 5 is ensured not to be interrupted;
Finally, the output end of the first energy storage converter 3 is connected with the input end of the energy storage system 2, so that the energy storage system 2 can be charged in real time, the energy storage system 2 is guaranteed to have enough electric quantity, the energy storage system 2 supplies power independently after the power grid 1 is separated, and the output power of the load 5 is guaranteed not to be interrupted.
Referring to fig. 2, a second embodiment of the present invention is as follows:
a power supply method using an energy storage system as an uninterruptible power supply is applied to a power supply system using an energy storage system as an uninterruptible power supply according to the first embodiment, as shown in fig. 2, and includes the following steps:
s0, calculating the product of the full load power of the load 5 and the preset working time required to be kept by the load 5 when the power grid 1 is powered off, and taking the product as reserved electric quantity.
In this embodiment, assuming that the full load power of the load 5 is 600kW, if a use time of 30 minutes is required to ensure the load 5 when the external power grid 1 is powered off, the battery system needs to reserve at least 0.5h×600kw=300 kWh. The preset working time period of the load 5 to be maintained when the power grid 1 is powered off can be set according to actual use requirements.
In this embodiment, the first energy storage converter 3 is set to be in a constant power mode, and the energy storage system 2 adjusts the power output of the first energy storage converter and the power output of the second energy storage converter 4 through the power output and the power of the first energy storage converter to ensure that enough power is reserved for the load 5 at any time by the power supply system. The second energy storage converter 4 is in a constant voltage output mode, and can adjust the output according to the power actually required by the load 5.
S1, calculating the ratio of reserved electric quantity to total electric quantity of the energy storage system 2 and taking the ratio as a reserved ratio;
In the present embodiment, taking the above assumption as an example, if the total electric quantity of the energy storage system 2 is 618kWh, the reserved ratio is 300kWh/618kWh, that is, about 50%.
S2, setting more than two charge state intervals according to the reserved ratio, and setting a corresponding power supply strategy for each charge state interval;
In this embodiment, the setting of the plurality of state of charge intervals according to the reservation ratio is specifically:
Setting a first state of charge interval to be a state of charge greater than the sum of the reserved ratio plus the first increment;
setting a second state of charge interval to be a state of charge less than or equal to the sum of the reserved ratio plus the first increment and greater than the sum of the reserved ratio plus the second increment, wherein the first increment is greater than the second increment;
setting a third state of charge interval to be a state of charge greater than the reserved ratio and less than or equal to the sum of the reserved ratio plus the second increment;
and setting the fourth charge state interval to be the charge state smaller than or equal to the reserved ratio.
In this embodiment, taking the case where the reservation ratio is 50%, the first increment is 20% and the second increment is 10%, the first state of charge interval is (70%, 100% ], the second state of charge interval is (60%, 70% ], the third state of charge interval is (50%, 60% ], and the fourth state of charge interval is (0%, 50% ].
And setting the intervals according to actual requirements, for example, when the load electricity utilization time period of the client is concentrated, the first interval and the second interval can be provided with wider thresholds, so that the battery system can be used in the concentrated electricity utilization state. If the loads are relatively distributed, the four intervals can be set to be even, so that the power pulled by the power grid side is ensured not to be suddenly increased and reduced, and the power pulled by the first energy storage alternating current device from the power grid side is always in a mild state.
The power supply strategies corresponding to the four charge state intervals are as follows:
s21, if the current state of charge is in a first state of charge interval, controlling the energy storage system 2 to output power which is a first percentage value of the required power to the second energy storage converter 4, and providing the power with the remaining percentage by the power grid 1;
S22, if the current state of charge is in a second state of charge interval, controlling the energy storage system 2 to output power which is a second percentage value of the required power to the second energy storage converter 4, and providing the power with the remaining percentage by the power grid 1;
s23, if the current state of charge is in a third state of charge interval, independently outputting power to the second energy storage converter 4 by the power grid 1;
The power grid 1 outputs power to the second energy storage converter 4 independently, and it is required to determine whether the full output power of the first energy storage converter 3 is smaller than the required power of the second energy storage converter 4, if yes, the energy storage system 2 is controlled to output power to the second energy storage converter 4 so as to complement the gap between the full output power of the first energy storage converter 3 and the required power of the second energy storage converter 4.
And S24, if the current state of charge is in a fourth state of charge interval, outputting power to the second energy storage converter 4 by the power grid 1, and simultaneously supplying power to the energy storage system 2 by the residual output power until the real-time state of charge of the energy storage system 2 is in a third state of charge interval.
In this embodiment, the first percentage value is 80%, and the second percentage value is 50%, and in other equivalent embodiments, the first percentage value and the second percentage value may be determined according to the actual reserved power and the reserved ratio, so as to ensure that the energy storage system 2 has enough power.
And S3, controlling the energy storage system 2 and the power grid 1 to supply power to the second energy storage converter 4 by using a corresponding power supply strategy according to a state of charge interval in which the current state of charge of the energy storage system 2 is.
In the present embodiment, the state of charge interval in which the power supply system is located and the power supply strategy are both executed by the control module of the energy storage system 2, which adjusts the output of the first energy storage converter 3 and the second energy storage converter 4 specifically by signal communication.
And S4, charging the energy storage system 2 through the first energy storage converter 3 in the valley period.
In the present embodiment, since the electricity price in the valley period is low, the energy storage system 2 is charged with the period to achieve the purpose of earning the spread.
And S5, controlling the energy storage system 2 to absorb the input electric energy on the first energy storage converter 3 when the load 5 is suddenly interrupted.
In summary, the invention discloses a power supply system and a method using an energy storage system as an uninterruptible power supply, wherein the energy storage system and a first energy storage converter externally connected with a power grid are used as power supply sources of a second energy storage converter together, a plurality of charge state intervals are divided by the ratio of reserved electric quantity to total electric quantity, the power output by the energy storage system is determined according to the current charge state, and the energy of the energy storage system is subjected to multistage regulation and control, so that the energy storage system has enough electric quantity at any time, and the output power of the system to a load is ensured to be stable enough.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent changes made by the specification and drawings of the present invention, or direct or indirect application in the relevant technical field, are included in the scope of the present invention.
Claims (6)
1. A power supply method using an energy storage system as an uninterruptible power supply is applied to a power supply system using the energy storage system as the uninterruptible power supply, and the power supply system
The energy storage system comprises an energy storage system, a first energy storage converter and a second energy storage converter; the output end of the first energy storage converter is connected with the input end of the energy storage system and the input end of the second energy storage converter respectively, and the output end of the energy storage system is connected with the input end of the second energy storage converter; the energy storage system is respectively in communication connection with the first energy storage converter and the second energy storage converter; the input end of the first energy storage converter is used for being externally connected with a power grid, and the output end of the second energy storage converter is used for being externally connected with a load, and the method is characterized by comprising the following steps:
s0, calculating the product of the full load power of the load and the preset working time required to be kept when the power grid is powered off, and taking the product as reserved electric quantity;
S1, calculating the ratio of reserved electric quantity of the energy storage system to the total electric quantity of the energy storage system and taking the ratio as a reserved ratio;
s2, setting more than two charge state intervals according to the reserved ratio, and setting a corresponding power supply strategy for each charge state interval;
S3, controlling the energy storage system and a power grid to supply power to a second energy storage converter by using the corresponding power supply strategy according to the state-of-charge interval in which the current state of charge of the energy storage system is located;
the setting of more than two charge state intervals according to the reservation ratio is specifically as follows:
setting a first state of charge interval to be a state of charge greater than the sum of the reserved ratio plus a first increment;
Setting a second state of charge interval to be a state of charge less than or equal to the sum of the reservation ratio plus the first increment and greater than the sum of the reservation ratio plus a second increment, wherein the first increment is greater than the second increment;
Setting a third state of charge interval to be a state of charge greater than the reserved ratio and less than or equal to the reserved ratio plus the sum of the second increment;
Setting a fourth state of charge interval to be a state of charge less than or equal to the reserved ratio;
the setting of the corresponding power supply strategy for each charge state interval specifically comprises the following steps:
s21, if the current state of charge is in the first state of charge interval, controlling the energy storage system to output power which is a first percentage value of the required power to the second energy storage converter, and providing the power with the remaining percentage by a power grid;
s22, if the current state of charge is in the second state of charge interval, controlling the energy storage system to output power which is a second percentage value of the required power to the second energy storage converter, and providing the power with the remaining percentage by a power grid;
S23, if the current state of charge is in the third state of charge interval, independently outputting power to the second energy storage converter by a power grid;
And S24, if the current state of charge is in the fourth state of charge interval, outputting power to the second energy storage converter by a power grid and simultaneously supplying power to the energy storage system by the residual output power until the real-time state of charge of the energy storage system is in the third state of charge interval.
2. A method of supplying power using an energy storage system as an uninterruptible power supply in accordance with claim 1, the method is characterized in that the step S23 further comprises the following steps:
And judging whether the full output power of the first energy storage converter is smaller than the required power of the second energy storage converter, if so, controlling the output power of the energy storage system to the second energy storage converter so as to complement the difference between the full output power of the first energy storage converter and the required power of the second energy storage converter.
3. The method of claim 1, wherein the first increment is 20%, the second increment is 10%, the first percentage value is 80%, and the second percentage value is 50%.
4. A method of supplying power using an energy storage system as an uninterruptible power supply in accordance with claim 1, the method is characterized in that the step S3 further comprises the following steps:
and S4, charging the energy storage system through the first energy storage converter in the valley period.
5. A method of supplying power using an energy storage system as an uninterruptible power supply in accordance with claim 1, the method is characterized in that the step S1 further comprises the following steps:
The first energy storage converter is set to be in a constant power mode, and the second energy storage converter is set to be in a constant voltage output mode.
6. A method of supplying power using an energy storage system as an uninterruptible power supply in accordance with claim 5, the method is characterized in that the step S3 further comprises the following steps:
s5, controlling the energy storage system to absorb the input electric energy on the first energy storage converter when the load is suddenly interrupted.
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| GB2551393A (en) * | 2016-06-17 | 2017-12-20 | Upside Energy Ltd | A system and method for controlling devices in a power distribution network |
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| CN110571915A (en) * | 2019-09-19 | 2019-12-13 | 浙江工业大学 | An intelligent energy storage power supply vehicle uninterruptible power supply system device and control method thereof |
| US10840723B1 (en) * | 2019-12-13 | 2020-11-17 | Capital One Services, Llc | Dynamic management of multiple device power consumption |
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