CN112271822A - Energy storage system and safety control method thereof - Google Patents
Energy storage system and safety control method thereof Download PDFInfo
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- CN112271822A CN112271822A CN202011036847.7A CN202011036847A CN112271822A CN 112271822 A CN112271822 A CN 112271822A CN 202011036847 A CN202011036847 A CN 202011036847A CN 112271822 A CN112271822 A CN 112271822A
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- energy storage
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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
- H02J15/00—Systems for storing electric energy
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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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
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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
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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
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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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
Abstract
The invention discloses an energy storage system and a safety control method thereof, wherein the energy storage system comprises an energy storage system arranged in a container, a plurality of cell stacks are arranged in the energy storage system, the cell stacks realize the safety detection of the energy storage system in the container through a single cell stack self-detection device and a system self-detection component, and the charging and discharging states of each cell stack are safely controlled. When the container type energy storage system is internally divided into 1-n battery stacks, the number of corresponding PCS is 1-n, the system can be flexibly distributed into 1-n subsystems for safety classification, only a single battery stack is cut off when only the single battery stack fails, all the battery stacks are cut off when the whole use part of the system fails, the container type energy storage system is reasonably and safely controlled, the charging and discharging of the single battery stack are realized, and the consistency of a battery cluster in the operation process is kept. Through the safety classification in the system, the single-pile independent operation is realized, the operation time is prolonged, and the consistency of the battery clusters is improved.
Description
Technical Field
The invention belongs to the technical field of energy storage systems, and particularly relates to an energy storage system and a safety control method thereof.
Background
Generally, from the safety perspective, it is long to improve container formula energy storage system operation better, realizes more system profits, and conventional practice is when a certain battery cluster of system inside goes wrong, breaks off this battery cluster, and other battery clusters are normally electrified, and this type of operation strategy can lead to the inconsistency difference between the battery cluster, influences system efficiency and whole life-span.
Disclosure of Invention
The invention aims to provide an energy storage system and a safety control method thereof, which aim to solve the problems of the background art.
In order to achieve the above purpose, the specific technical scheme of the energy storage system and the safety control method thereof of the invention is as follows:
the utility model provides an energy storage system, is including installing the energy storage system in the container, energy storage system's inside is provided with a plurality of battery piles, and the battery pile realizes energy storage system's safety inspection in the container through single battery pile self-checking device and system self-checking part, the charge-discharge state of every battery pile of safety control.
Further, each cell stack is formed by converging a plurality of cell clusters.
Further, the cell stack self-checking device comprises a total current sensor, a total voltage sensor, an insulation detector, a PCS and a three-level master control, wherein the total current sensor is installed at a confluence point of a plurality of cell clusters and used for collecting the total current of a single cell stack, the total voltage sensor is used for collecting the total voltage of the single cell stack, the insulation detector is used for collecting insulation signals of the single cell stack, the PCS is used for collecting the fault state of a power system of the single cell stack, and the three-level master control is used for collecting whether the signals of.
Further, system self-checking part is including the fire extinguishing system who is used for gathering energy storage system fire control signal, the air conditioning system who is used for adjusting the energy storage system temperature, the UPS system who is used for gathering energy storage system UPS and is equipped with the electric state, the smart electric meter detector that is used for gathering the supplementary power consumption input electric quality of energy storage system and the EMS system that is used for gathering the inside communication state of energy storage system EMS.
A safety control method of an energy storage system comprises the steps of carrying out self-checking on a single battery stack in the energy storage system through a battery stack self-checking device to judge whether a fault occurs or not, and carrying out checking on the whole energy storage system through a system self-checking component to judge whether the fault occurs or not.
Further, the control flow of the self-test device of the cell stack comprises the following steps: closing all disconnecting switches in the energy storage system, performing EMS system self-checking, when the single battery stack self-checking finds that any one of a total current sensor, a total voltage sensor, an insulation detector, a PCS or a three-level master control fails, directly powering down the battery stack, and if the single battery stack has individual faults, not affecting other battery stacks which are normally detected, starting charging and discharging, thereby operating some battery stacks in the energy storage system.
Further, the control flow of the system self-inspection component comprising the energy storage system is as follows: closing all disconnecting switches in the energy storage system, self-checking the EMS system, when finding that any one of an anti-fire system, an air conditioning system, a UPS system, a smart meter detector or the EMS system in the energy storage system has a fault, directly powering off the whole energy storage system, stopping the energy storage system, and if not, combining a normal cell stack communication signal in a cell stack self-checking device, starting a normal cell stack charging and discharging instruction on the next step, and charging and discharging the cell stack.
Compared with the prior art, the invention has the following beneficial effects: when the container type energy storage system is internally divided into 1-n battery stacks, the number of corresponding PCS is 1-n, the system can be flexibly distributed into 1-n subsystems for safety classification, only a single battery stack is cut off when only the single battery stack fails, all the battery stacks are cut off when the whole use part of the system fails, the container type energy storage system is reasonably and safely controlled, the charging and discharging of the single battery stack are realized, and the consistency of a battery cluster in the operation process is kept. Through the safety classification in the system, the single-pile independent operation is realized, the operation time is prolonged, and the consistency of the battery clusters is improved.
Drawings
Fig. 1 is a monitoring flow block diagram of the energy storage system of the present invention.
Detailed Description
For a better understanding of the objects, structure and function of the invention, reference should be made to FIG. 1 for a better understanding of the invention.
The utility model provides an energy storage system, is provided with a plurality of battery piles including installing the energy storage system in the container, and every battery pile is formed by a plurality of battery clusters converge, and the battery pile realizes energy storage system's safety inspection in the container through single battery pile self-checking device and system self-checking part, the charge-discharge state of every battery pile of safety control.
The battery stack self-checking device comprises a total current sensor, a total voltage sensor, an insulation detector, a PCS (personal computer) and a three-level master control, wherein the total current sensor is installed at a confluence position of a plurality of battery clusters and used for collecting the total current of a single battery stack, the total voltage sensor is used for collecting the total voltage of the single battery stack, the insulation detector is used for collecting insulation signals of the single battery stack, the PCS is used for collecting the fault state of a power system of the single battery stack, and the three-level master control is used for.
The system self-checking component comprises a fire fighting system used for acquiring fire fighting signals of the energy storage system, an air conditioning system used for adjusting the temperature of the energy storage system, a UPS system used for acquiring the UPS standby power state of the energy storage system, an intelligent electric meter detector used for acquiring the auxiliary power input electric quality of the energy storage system and an EMS system used for acquiring the internal communication state of an EMS of the energy storage system.
A safety control method of an energy storage system comprises the steps of carrying out self-checking on a single battery stack in the energy storage system through a battery stack self-checking device to judge whether a fault occurs or not, and carrying out checking on the whole energy storage system through a system self-checking component to judge whether the fault occurs or not.
The control flow of the self-checking device of the cell stack is as follows: closing all disconnecting switches in the energy storage system, performing EMS system self-checking, when the single battery stack self-checking finds that any one of a total current sensor, a total voltage sensor, an insulation detector, a PCS or a three-level master control fails, directly powering down the battery stack, and if the single battery stack has individual faults, not affecting other battery stacks which are normally detected, starting charging and discharging, thereby operating some battery stacks in the energy storage system.
The control process of the system self-checking component of the energy storage system comprises the following steps: closing all disconnecting switches in the energy storage system, self-checking the EMS system, when finding that any one of an anti-fire system, an air conditioning system, a UPS system, a smart meter detector or the EMS system in the energy storage system has a fault, directly powering off the whole energy storage system, stopping the energy storage system, and if not, combining a normal cell stack communication signal in a cell stack self-checking device, starting a normal cell stack charging and discharging instruction on the next step, and charging and discharging the cell stack.
Example 1
The energy storage system is provided with two cell stacks, every four cell clusters are converged into one cell stack, each single cell stack self-checking device comprises a total current sensor, a total voltage sensor, an insulation monitoring detector, a PCS and a three-level master control (which can collect cell information of a secondary master control and a primary slave control) at the convergence position and is used for acquiring the total voltage, the total current, insulation signals, the fault state of a power system and whether cell signals in the cell stacks are abnormal or not; the system component self-checking system comprises a set of fire-fighting system, a set of air-conditioning system, a set of UPS system, a set of smart electric meter monitoring system and a set of local EMS system, and is used for acquiring fire-fighting signals, UPS standby power state, auxiliary power input power quality and communication state in EMS of the whole system.
When the energy storage system starts to be electrified, all disconnecting switches and switches in the energy storage system are closed firstly, the EMS system is electrified, single-pile self-checking and system component self-checking are started, when the pile 1 or the pile 2 finds that a current signal or a voltage signal or an insulation signal or a master control signal is abnormal, the pile stops working, a power-off state is kept, and other normal single-pile charging and discharging states can be prepared. Meanwhile, if the fire-fighting system or the air-conditioning system or the UPS or the intelligent electric meter detector or the local EMS system is found to be abnormal in the system component self-detection, the whole system stops working and keeps a power-off state, and if the power-off state is not found, a normal stack communication signal in the single stack self-detection can be combined to start a next normal stack charging and discharging instruction, so that the single stack can be charged and discharged. The problem that consistency difference among the battery clusters is large due to the fact that only one battery cluster is disconnected in a conventional scheme is solved, the system operation time is prolonged, independent operation of an internal battery stack is achieved, and system safety and actual operation time are prolonged.
Example 2
The energy storage system is provided with four cell stacks, every two cell clusters are converged into one cell stack, each single cell stack self-checking device comprises a total current sensor, a total voltage sensor, an insulation monitoring detector, a PCS and a three-level master control (which can collect cell information of a secondary master control and a primary slave control) at the convergence position and is used for acquiring the total voltage, the total current, insulation signals, the fault state of a power system and whether cell signals in the cell stacks are abnormal or not; the system component self-checking system comprises a set of fire-fighting system, a set of air-conditioning system, a set of UPS system, a set of smart electric meter monitoring system and a set of local EMS system, and is used for acquiring fire-fighting signals, UPS standby power state, auxiliary power input power quality and communication state in EMS of the whole system.
When the energy storage system starts to be electrified, all disconnecting switches and switches in the energy storage system are closed firstly, the EMS system is electrified, single-pile self-checking and system component self-checking are started, when the pile 1, the pile 2, the pile 3 or the pile 4 find that current signals, voltage signals, insulation signals or main control signals are abnormal, the pile stops working, the power-off state is kept, and other normal states can be prepared for single-pile charging and discharging states. Meanwhile, if the fire-fighting system or the air-conditioning system or the UPS or the intelligent electric meter detector or the local EMS system is found to be abnormal in the system component self-detection, the whole system stops working and keeps a power-off state, and if the power-off state is not found, a normal stack communication signal in the single stack self-detection can be combined to start a next normal stack charging and discharging instruction, so that the single stack can be charged and discharged. The problem that consistency difference among the battery clusters is large due to the fact that only one battery cluster is disconnected in a conventional scheme is solved, the system operation time is prolonged, independent operation of an internal battery stack is achieved, and system safety and actual operation time are prolonged.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (7)
1. An energy storage system, including the energy storage system who installs in the container, its characterized in that: the inside of energy storage system is provided with a plurality of battery piles, and the safety inspection of energy storage system in the container is realized through single battery pile self-checking device and system self-checking part to the battery pile, the charge-discharge state of every battery pile of safety control.
2. The energy storage system of claim 1, wherein each of the cell stacks is formed by a plurality of cell clusters being merged.
3. The energy storage system of claim 2, wherein the cell stack self-checking device comprises a total current sensor installed at a confluence of a plurality of cell clusters for collecting total current of a single cell stack, a total voltage sensor for collecting total voltage of the single cell stack, an insulation detector for collecting insulation signals of the single cell stack, a PCS for collecting a fault state of a power system of the single cell stack, and a three-level main control for collecting whether the signals of the cells of the single cell stack are abnormal.
4. The energy storage system of claim 2, wherein the system self-test component comprises a fire protection system for collecting fire protection signals of the energy storage system, an air conditioning system for adjusting the temperature of the energy storage system, a UPS system for collecting UPS standby power state of the energy storage system, a smart meter detector for collecting auxiliary power input electric quality of the energy storage system, and an EMS system for collecting EMS internal communication state of the energy storage system.
5. A safety control method of an energy storage system is characterized by comprising the steps of carrying out self-checking on a single battery stack in the energy storage system through a battery stack self-checking device to judge whether a fault occurs or not and carrying out checking on the whole energy storage system through a system self-checking component to judge whether the fault occurs or not.
6. The safety control method of the energy storage system according to claim 5, comprising the control flow of the stack self-test device: closing all disconnecting switches in the energy storage system, performing EMS system self-checking, when the single battery stack self-checking finds that any one of a total current sensor, a total voltage sensor, an insulation detector, a PCS or a three-level master control fails, directly powering down the battery stack, and if the single battery stack has individual faults, not affecting other battery stacks which are normally detected, starting charging and discharging, thereby operating some battery stacks in the energy storage system.
7. The safety control method of the energy storage system according to claim 5, comprising the control flow of a system self-test component of the energy storage system: closing all disconnecting switches in the energy storage system, self-checking the EMS system, when finding that any one of an anti-fire system, an air conditioning system, a UPS system, a smart meter detector or the EMS system in the energy storage system has a fault, directly powering off the whole energy storage system, stopping the energy storage system, and if not, combining a normal cell stack communication signal in a cell stack self-checking device, starting a normal cell stack charging and discharging instruction on the next step, and charging and discharging the cell stack.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011036847.7A CN112271822A (en) | 2020-09-28 | 2020-09-28 | Energy storage system and safety control method thereof |
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| CN202011036847.7A CN112271822A (en) | 2020-09-28 | 2020-09-28 | Energy storage system and safety control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113990054A (en) * | 2021-11-16 | 2022-01-28 | 许继集团有限公司 | Energy storage power station data analysis and early warning system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113990054A (en) * | 2021-11-16 | 2022-01-28 | 许继集团有限公司 | Energy storage power station data analysis and early warning system |
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