CN117411101A - Control system and control method for energy storage system - Google Patents
Control system and control method for energy storage system Download PDFInfo
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- CN117411101A CN117411101A CN202210805156.1A CN202210805156A CN117411101A CN 117411101 A CN117411101 A CN 117411101A CN 202210805156 A CN202210805156 A CN 202210805156A CN 117411101 A CN117411101 A CN 117411101A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 186
- 238000000034 method Methods 0.000 title claims abstract description 32
- 101150003196 PCS1 gene Proteins 0.000 claims abstract description 55
- 101100493726 Phalaenopsis sp. BIBSY212 gene Proteins 0.000 claims abstract description 55
- 101100030895 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) RPT4 gene Proteins 0.000 claims abstract description 55
- 101000984533 Homo sapiens Ribosome biogenesis protein BMS1 homolog Proteins 0.000 claims abstract description 44
- 102100027057 Ribosome biogenesis protein BMS1 homolog Human genes 0.000 claims abstract description 44
- 238000004891 communication Methods 0.000 claims abstract description 22
- 101150071172 PCS2 gene Proteins 0.000 claims abstract 15
- 238000012360 testing method Methods 0.000 description 16
- 238000007599 discharging Methods 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00302—Overcharge protection
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00306—Overdischarge protection
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a control system and a control method for an energy storage system, wherein the control system comprises: the system comprises a first energy storage system, a second energy storage system and a power supply system, wherein the first energy storage system comprises a BMS1, a PCS1 electrically connected with the first energy storage system, and a first switch for controlling the PCS1 to be connected or disconnected, and the PCS1 is in communication connection with the BMS 1; the second energy storage system comprises a BMS2, PCS2 electrically connected with the second energy storage system, and a second switch for controlling the PCS2 to be connected or disconnected, and the PCS2 is in communication connection with the BMS2, wherein the first switch and the second switch are both in communication connection with BMS1 and BMS2 at the same time. Above-mentioned control system, in the experimental in-process of first energy storage system and mutual charge-discharge of second energy storage system, control PCS1 and PCS2 shut down simultaneously through BMS1 or BMS2 simultaneous control first switch and second switch, ensure the operation safety in the experimental in-process of first energy storage system and second energy storage system.
Description
Technical Field
The invention relates to the technical field of energy storage systems, in particular to a control system and a control method for an energy storage system.
Background
At present, capacity and power of a distributed electric power energy storage system are continuously improved, a set of energy storage system needs MW-level charging and discharging power when in factory test, if the energy storage system utilizes electric energy of a power grid to conduct charging and discharging experiments, electric energy waste is caused, production cost of the energy storage system is increased, the existing scheme is that two sets of energy storage systems are tested simultaneously, one energy storage system is charged and tested when in discharging test, if charging power of the two energy storage systems is different, the two energy storage systems cannot be charged and discharged completely, for example, one charging power is 1.3MW, the other discharging power is 1.4MW, and therefore a charging and discharging difference value of 0.1MW of the two energy storage systems is the power required to be absorbed by the power grid or used by loads. In the test scheme of the connection load, two energy storage systems are required to be simultaneously turned on and turned off, and at least the interval time is controlled to be within 20 ms. At present, a set of EMS control system is configured independently, namely, synchronous on-off of two energy storage systems is realized through the EMS system, but the cost of the equipment is high.
In view of the foregoing, there is a need for improvements in existing control systems for energy storage systems to address the above-described issues.
Disclosure of Invention
The present invention provides a control system and a control method for an energy storage system to solve one of the above problems.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
a control system for an energy storage system, the control system comprising: the system comprises a first energy storage system, a second energy storage system and a power supply system, wherein the first energy storage system comprises a BMS1, a PCS1 electrically connected with the first energy storage system, and a first switch for controlling the PCS1 to be connected or disconnected, and the PCS1 is in communication connection with the BMS 1;
the second energy storage system comprises a BMS2, a PCS2 electrically connected with the second energy storage system, and a second switch for controlling the PCS2 to be connected or disconnected, wherein the PCS2 is in communication connection with the BMS 2;
wherein, first switch and second switch all simultaneously with BMS1 and BMS2 communication connection.
Further, the output ends of the PCS1 and the PCS2 are connected in parallel to form a system output end, and the system output end is electrically connected with a power grid and an external load respectively.
Further, the control system further comprises a main line electrically connected to the output end of the system, a power grid branch line connecting the main line with a power grid, a load branch line connecting the main line with a load, and a protection device arranged on the power grid branch line and used for controlling the connection or disconnection between the output end of the system and the power grid, wherein the protection device and the protection device are both in communication connection with the BMS1 or the BMS 2.
Further, the control system further comprises a current sensor which is arranged on the power grid branch line and used for detecting whether current flows from the PCS1 or the PCS2 to the power grid, the current sensor is located on one side, far away from the power grid, of the protection device, and the current sensor is in communication connection with the BMS1 or the BMS 2.
Further, the control system includes an inverter disposed on the dry line.
Further, the first switch and the second switch are both dry contacts.
The invention also relates to a control method of the control system for the energy storage system, which comprises the following steps: BMS1 controls PCS1 to enable the first energy storage system to charge the second energy storage system; alternatively, the BMS2 controls the PCS2 to charge the second energy storage system to the first energy storage system;
if at least one of the BMS1 and the BMS2 detects the shutdown signal, the BMS1 and/or the BMS2 controls the first switch and the second switch to be simultaneously opened, so that the PCS1 and the PCS2 are simultaneously shutdown.
Further, the shutdown signal includes one or more of a complete charge of the first energy storage system, a complete discharge of the first energy storage system, a complete charge of the second energy storage system, a complete discharge of the second energy storage system, a PCS1 fault, and a PCS2 fault.
Further, the output ends of the PCS1 and the PCS2 are connected in parallel to form a system output end, the system output end is respectively and electrically connected with a power grid and an external load, after the PCS1 and the PCS2 are stopped at the same time,
if the first energy storage system or the second energy storage system is completely discharged and the second energy storage system or the first energy storage system is not fully charged, the PCS2 is controlled by the power grid to continuously charge the second energy storage system or the PCS1 is controlled to continuously charge the first energy storage system to the complete charge;
or,
if the second energy storage system or the first energy storage system is completely charged and the first energy storage system or the second energy storage system is not completely discharged, the PCS1 is controlled to enable the first energy storage system or the PCS2 is controlled to enable the second energy storage system to supply power to an external load until the discharge is complete.
Further, the control system further comprises a current sensor for detecting whether current flows to the power grid and a protection device arranged between the current sensor and the power grid, wherein the current sensor and the protection device are in communication connection with the BMS1 or the BMS2, and if the current sensor detects that current passes through, the BMS1 or the BMS2 controls the protection device to be disconnected.
Compared with the prior art, the invention has the beneficial effects that: according to the control system for the energy storage system, in the test process of mutual charge and discharge of the first energy storage system and the second energy storage system, the BMS1 or the BMS2 is used for controlling the first switch and the second switch simultaneously, so that the PCS1 and the PCS2 are controlled to stop simultaneously, and the operation safety of the first energy storage system and the second energy storage system in the test process is ensured.
Drawings
FIG. 1 is a topology of a control system for an energy storage system of the present invention.
FIG. 2 is a flowchart of one embodiment of a control method of the control system for an energy storage system of the present invention.
Fig. 3 is a flowchart of another embodiment of a control method of the control system for an energy storage system of the present invention.
The system comprises a first energy storage system, a second energy storage system, a first switch, a second switch, a 5-protection device, a 6-current sensor, a 7-inverter, an 8-power grid, a 9-external load, a 10-main line, a 11-power grid branch line and a 12-load branch line, wherein the first energy storage system, the second energy storage system, the first switch, the second switch, the 5-protection device are arranged.
Detailed Description
In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the orientation or positional relationship indicated in the present invention is based on the orientation or positional relationship shown in the auxiliary drawings, which is merely for simplifying the description of the present invention, and does not indicate or imply that the device must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of the present invention.
In the various illustrations of the invention, some dimensions of structures or portions may be exaggerated relative to other structural portions for convenience of illustration, and thus serve only to illustrate the basic structure of the inventive subject matter.
The invention provides a control system for an energy storage system, which is used in a mutual charge and discharge test of two energy storage systems to control the charge and discharge processes of the two energy storage systems. As shown in fig. 1, the control system includes: the energy storage system comprises a first energy storage system 1, a PCS1 electrically connected with the first energy storage system 1 and a first switch 3 for controlling the PCS1 to be connected or disconnected, wherein the first energy storage system 1 comprises a BMS1, and the PCS1 is in communication connection with the BMS 1; the system comprises a second energy storage system 2, a PCS2 electrically connected with the second energy storage system 2, and a second switch 4 for controlling the PCS2 to be connected or disconnected, wherein the second energy storage system 2 comprises a BMS2, and the PCS2 is in communication connection with the BMS 2; wherein, the first switch 3 and the second switch 4 are both in communication connection with the BMS1 and the BMS2 at the same time.
The control system controls the PCS1 and the PCS2 to stop simultaneously by controlling the first switch 3 and the second switch 4 simultaneously through the BMS1 or the BMS2, so that the operation safety of the first energy storage system 1 and the second energy storage system 2 in the test process is ensured.
The first energy storage system 1 and the second energy storage system 2 also comprise battery systems (not shown), and the BMS1 and the BMS2 (Battery Management System) are battery management systems, and have the main functions of intelligently managing and maintaining the battery systems, monitoring the states of the battery systems, and preventing the battery systems from being overcharged and overdischarged so as to prolong the service life of the battery; PCS1 and PCS2 (Power Conversion System) are both bidirectional energy storage inverters, are connected between a battery system in an energy storage system and a power grid and/or an external load, can control the charging and discharging processes of the energy storage system, and can directly supply power to the alternating current external load under the condition of no power grid.
In the control system of the present invention, the BMS1 controls the PCS1 to perform the charge and discharge operation on the battery system in the first energy storage system 1, and the BMS2 controls the PCS2 to perform the charge and discharge operation on the battery system in the second energy storage system 2.
In this embodiment, the first switch 3 and the second switch 4 are dry contacts, and the dry contacts have no polarity between the two contacts, so that the dry contacts are suitable for industrial control as electrical switches, and the timeliness of controlling the PCS1 and the PCS2 is achieved by using the dry contacts in the process of mutually charging and discharging the first energy storage system 3 and the second energy storage system 4.
Further, the output ends of the PCS1 and the PCS2 are connected in parallel to form a system output end, the system output end is electrically connected with the power grid 8 and the external load 9 respectively, and the power grid 8 is used for supplying power to the first energy storage system 1 and the second energy storage system 2 through the PCS1 or the PCS2 respectively, or the first energy storage system 1 and the second energy storage system 2 supply power to the external load 9 through the PCS1 and the PCS2 respectively. In particular, in the process of mutually charging and discharging two energy storage systems with different powers, when one of the first energy storage system 1 and the second energy storage system 2 is not fully charged, the first energy storage system 1 or the second energy storage system 2 is continuously charged to the fully charged state by using the power grid 8, and when one of the first energy storage system 1 and the second energy storage system 2 is not fully discharged, the first energy storage system 1 or the second energy storage system 2 supplies power to the external load 9 through the corresponding PCS1 or PCS2, so that the first energy storage system 1 or the second energy storage system 2 reaches the fully charged state or the fully discharged state.
In general, in the case that one of the first and second energy storage systems 1 and 2 is charged or discharged completely, the BMS1 or 2 simultaneously controls the first and second switches 3 and 4 to be turned off such that the PCS1 and PCS2 no longer operate the first and second energy storage systems 1 and 2 to charge or discharge, but, in order to avoid the case that the first and second switches 3 and 4 are turned off not timely or abnormally, the control system further includes a protection device 5 for controlling the connection or disconnection between the system output and the power grid 8 to perform a double protection function on the control system to ensure the safety of the first and second energy storage systems 1 and 2.
Specifically, the control system further includes a trunk line 10 electrically connected to the output end of the system, a grid branch line 11 connecting the trunk line 10 and the grid 8, and a load branch line 12 connecting the trunk line 10 and the external load 9, and the protection device 5 is disposed on the grid branch line 11, that is, the protection device 5 is only used for connecting or disconnecting the PCS1 and PCS2 with the grid 8.
Further, the protection device 5 is communicatively connected to the BMS1 or the BMS2, that is, one of the BMS1 or the BMS2 can control the disconnection or the connection of the protection device 5.
In a specific implementation process, the protection device 5 is preferably a circuit breaker, and when the BMS1 or the BMS2 receives that a current flows from the PCS1 or the PCS2 to the power grid 8 due to the characteristics of short circuit or overcurrent protection, the BMS1 or the BMS2 controls the circuit breaker to be opened, so as to prevent the current from flowing from the first energy storage system 1 or the second energy storage system 2 to the power grid 8 in a reverse direction, and thus, impact is caused to the power grid 8.
The control system further comprises a current sensor 6 arranged on the branch line 11 of the power grid and used for detecting whether current flows reversely to the power grid, wherein the current sensor 6 is positioned on one side, far away from the power grid 9, of the protection device 5, that is, the current sensor 6 is positioned at the front end of the protection device 5, so that the current sensor 6 can detect current in time. The current sensor 6 and the protection device 5 are in communication connection with the BMS1 or in communication connection with the BMS2, so that the BMS1 or the BMS2 can timely make an indication of disconnection to the protection device 5 after receiving the signal of the current sensor 6, and the PCS1 and the PCS2 are disconnected from the power grid 8.
Further, the control system comprises an inverter 7 arranged on the trunk line 10, and the inverter 7 is used for performing direct-to-alternating current conversion on the current output by the battery system, so that the direct current output by the battery system becomes alternating current required by the power grid 8 or the external load 9.
The control system is integrally provided with: the first energy storage system 1 and the second energy storage system 2 are respectively connected with the PCS1 and the PCS2, the PCS1 and the PCS2 are connected in parallel and then are connected with the inverter 7 on the trunk line 10, then the output end of the inverter 7 is respectively connected with the power grid 8 and the external load 9, the power grid 8 and the external load 9 are in parallel connection, and the current sensor 6 and the protection device 5 are used for controlling the connection or disconnection between the inverter 7 and the power grid 8.
The invention also provides a control method of the control system, as shown in fig. 2 and 3, for implementing a process of mutually charging and discharging the first energy storage system 1 and the second energy storage system 2.
The control method comprises the following steps: the first energy storage system 1 is controlled to conduct discharge test, and the second energy storage system 2 is controlled to conduct charge test.
Specifically, the BMS1 controls the PCS1 to charge the first energy storage system 1 to the second energy storage system 2. If at least one of the BMS1 and the BMS2 detects the shutdown signal, the BMS1 and/or the BMS2 controls the first switch 3 and the second switch 4 to be turned off simultaneously, so that the PCS1 and the PCS2 are shutdown simultaneously, and operation safety of the first energy storage system 1 and the second energy storage system 2 is ensured.
The shutdown signal includes, but is not limited to, one or more of a complete charge of the first energy storage system, a complete discharge of the first energy storage system, a complete charge of the second energy storage system, a complete discharge of the second energy storage system, a PCS1 fault, and a PCS2 fault.
Further, as shown in fig. 3, after the PCS1 and the PCS2 are stopped at the same time, if the first energy storage system 1 is completely discharged and the second energy storage system 2 is not fully charged, the PCS2 is controlled to continuously charge the second energy storage system 2 to the complete charge by using the power grid 8; if the second energy storage system 2 is fully charged and the first energy storage system 1 is not fully discharged, the PCS1 is controlled to enable the first energy storage system 1 to continue to supply power to the external load 9. To complete the test process of complete discharge of the first energy storage system 1 and complete charge of the second energy storage system 2.
In this embodiment, if the current sensor 6 and the protection device 5 are both in communication connection with the BMS1, if the current sensor 6 detects that current flows from the PCS1 to the power grid 8, relevant information is transmitted to the BMS1, and the BMS1 controls the protection device 5 to be disconnected, so that current is prevented from flowing reversely to the power grid 8, and impact is caused to the power grid 8.
If the current sensor 6 and the protection device 5 are both in communication connection with the BMS2, if the current sensor 6 detects that current reversely flows to the power grid 8, the BMS2 controls the protection device 5 to be disconnected, so that the current reversely flows to the power grid 8 and the impact on the power grid 8 is avoided.
Correspondingly, the control method further comprises the following steps: the second energy storage system 2 is subjected to a discharge test and the first energy storage system 1 is subjected to a charge test.
Specifically, the BMS2 controls the PCS2 to charge the second energy storage system 2 to the first energy storage system 1, and if at least one of the BMS1 and the BMS2 detects a shutdown signal, the BMS1 and/or the BMS2 controls the first switch 3 and the second switch 4 to be simultaneously turned off, so that the PCS1 and the PCS2 are simultaneously shutdown to ensure operation safety of the first energy storage system 1 and the second energy storage system 2.
As shown in fig. 3, after the PCS1 and the PCS2 are simultaneously stopped, if the second energy storage system 2 is completely discharged and the first energy storage system 1 is not fully charged, the PCS1 is controlled to continuously charge the first energy storage system 1 to the complete charge by using the power grid 8; if the first energy storage system 1 is fully charged and the second energy storage system 2 is not fully discharged, the PCS2 is controlled to enable the second energy storage system 2 to continue to supply power to the external load 9. To complete the test process of the complete charge of the first energy storage system 1 and the complete discharge of the second energy storage system 2.
Likewise, if the current sensor 6 detects that a current passes, the BMS1 or the BMS2 controls the protection device 5 to be turned off, and the secondary protection of the control system by the current sensor 6 and the protection device 5 is the same as the above-mentioned test process, which is not described in detail.
In summary, in the control system for an energy storage system according to the present invention, in the test process of mutual charging and discharging of the first energy storage system 1 and the second energy storage system 2, the BMS1 or the BMS2 simultaneously controls the first switch 3 and the second switch 4 to control the PCS1 and the PCS2 to stop simultaneously, so as to ensure operation safety in the test process of the first energy storage system 1 and the second energy storage system 2.
It should be understood that although the present disclosure describes embodiments in terms of examples, not every embodiment is provided with a single embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.
The above list of detailed descriptions is only specific to practical embodiments of the present invention, and is not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. A control system for an energy storage system, characterized by: comprising the following steps:
a first energy storage system, the first energy storage system including a BMS1,
a PCS1 electrically connected with the first energy storage system, and a first switch for controlling the PCS1 to be connected or disconnected, wherein the PCS1 is in communication connection with the BMS 1;
a second energy storage system, the second energy storage system including a BMS2,
a PCS2 electrically connected with the second energy storage system, a second switch for controlling the PCS2 to be connected or disconnected, and the PCS2 is in communication connection with the BMS2,
wherein, first switch and second switch all simultaneously with BMS1 and BMS2 communication connection.
2. The control system for an energy storage system of claim 1, wherein: the output ends of the PCS1 and the PCS2 are connected in parallel to form a system output end, and the system output end is electrically connected with a power grid and an external load respectively.
3. The control system for an energy storage system of claim 2, wherein: the control system further comprises a main line electrically connected with the system output end, a power grid branch line connected with the main line and a power grid, a load branch line connected with the main line and a load, and a protection device arranged on the power grid branch line and used for controlling the connection or disconnection between the system output end and the power grid, wherein the protection device is in communication connection with the BMS1 or the BMS 2.
4. A control system for an energy storage system as in claim 3, wherein: the control system further comprises a current sensor which is arranged on the power grid branch line and used for detecting whether current flows to the power grid, the current sensor is positioned on one side, far away from the power grid, of the protection device, and the current sensor and the protection device are in communication connection with the BMS1 or the BMS 2.
5. A control system for an energy storage system as in claim 3, wherein: the control system comprises an inverter arranged on the dry wire.
6. A control system for an energy storage system according to any one of claims 1 to 5, wherein: the first switch and the second switch are both dry contacts.
7. A control method for a control system for an energy storage system according to any one of claims 1 to 6, characterized by: the control method comprises the following steps:
BMS1 controls PCS1 to enable the first energy storage system to charge the second energy storage system; alternatively, the BMS2 controls the PCS2 to charge the second energy storage system to the first energy storage system;
if at least one of the BMS1 and the BMS2 detects the shutdown signal, the BMS1 and/or the BMS2 controls the first switch and the second switch to be simultaneously opened, so that the PCS1 and the PCS2 are simultaneously shutdown.
8. The control method of the control system of the energy storage system according to claim 7, wherein: the shutdown signal includes one or more of a complete charge of the first energy storage system, a complete discharge of the first energy storage system, a complete charge of the second energy storage system, a complete discharge of the second energy storage system, a PCS1 fault, and a PCS2 fault.
9. The control method of the control system of the energy storage system according to claim 7, wherein:
the output ends of the PCS1 and the PCS2 are connected in parallel to form a system output end, the system output end is respectively and electrically connected with a power grid and an external load, after the PCS1 and the PCS2 are stopped at the same time,
if the first energy storage system or the second energy storage system is completely discharged and the second energy storage system or the first energy storage system is not fully charged, the PCS2 is controlled by the power grid to continuously charge the second energy storage system or the PCS1 is controlled to continuously charge the first energy storage system to the complete charge;
or,
if the second energy storage system or the first energy storage system is completely charged and the first energy storage system or the second energy storage system is not completely discharged, the PCS1 is controlled to enable the first energy storage system or the PCS2 is controlled to enable the second energy storage system to supply power to an external load until the discharge is complete.
10. The control method of a control system of an energy storage system according to claim 9, wherein: the control system also comprises a current sensor for detecting whether current flows to the power grid and a protection device arranged between the current sensor and the power grid, wherein the current sensor and the protection device are both in communication connection with the BMS1 or the BMS2,
and if the current sensor detects that current passes through, the BMS1 or the BMS2 controls the protection device to be disconnected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210805156.1A CN117411101A (en) | 2022-07-08 | 2022-07-08 | Control system and control method for energy storage system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210805156.1A CN117411101A (en) | 2022-07-08 | 2022-07-08 | Control system and control method for energy storage system |
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| CN117411101A true CN117411101A (en) | 2024-01-16 |
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| CN202210805156.1A Pending CN117411101A (en) | 2022-07-08 | 2022-07-08 | Control system and control method for energy storage system |
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| Country | Link |
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- 2022-07-08 CN CN202210805156.1A patent/CN117411101A/en active Pending
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