CN114094656A - Charging and discharging protection method for distributed energy storage equipment - Google Patents
Charging and discharging protection method for distributed energy storage equipment Download PDFInfo
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- CN114094656A CN114094656A CN202111273500.9A CN202111273500A CN114094656A CN 114094656 A CN114094656 A CN 114094656A CN 202111273500 A CN202111273500 A CN 202111273500A CN 114094656 A CN114094656 A CN 114094656A
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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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
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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
- H02J7/00308—Overvoltage protection
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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
- H02J7/00309—Overheat or overtemperature protection
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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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
- H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
- H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a charge and discharge protection method for distributed energy storage equipment, which can monitor each single battery of the distributed energy storage equipment in real time in the charge and discharge process and carry out charge and discharge protection as far as possible, and comprises the following steps: acquiring real-time data of single batteries in the distributed energy storage equipment, wherein the real-time data comprises temperature, voltage, current and insulation values; calculating, comparing and analyzing the acquired real-time data, and triggering alarm signals of corresponding types according to comparison and analysis results; if the response time of the alarm signal exceeds the preset time, generating an alarm instruction of a corresponding type; and sending the alarm instruction to the charge and discharge control equipment through the ModBus.
Description
Technical Field
The invention relates to the field of distributed energy storage equipment, in particular to a charging and discharging protection method for the distributed energy storage equipment.
Background
The application development of the distributed energy storage technology has important strategic significance for constructing a clean, low-carbon, safe and efficient modern energy industry system, promoting the supply side innovation of the energy industry in China and promoting the energy production and utilization mode innovation. At present, with the wide deployment of distributed energy storage power stations, the charging and discharging safety becomes a concern problem, and if a charging and discharging accident happens, not only equipment damage can be caused, but also serious threats can be generated to the security of lives and properties.
Disclosure of Invention
The invention aims to provide a charging and discharging protection method for distributed energy storage equipment, which can monitor each single battery of the distributed energy storage equipment in real time in the charging and discharging process and carry out charging and discharging protection as far as possible.
The embodiment of the invention is realized by the following steps:
a charge-discharge protection method for a distributed energy storage device, the charge-discharge protection method comprising:
acquiring real-time data of single batteries in the distributed energy storage equipment, wherein the real-time data comprises temperature, voltage, current and insulation values;
calculating, comparing and analyzing the acquired real-time data, and triggering alarm signals of corresponding types according to comparison and analysis results;
if the response time of the alarm signal exceeds the preset time, generating an alarm instruction of a corresponding type;
and sending the alarm instruction to the charge and discharge control equipment through the ModBus.
In a preferred embodiment of the present invention, when the real-time temperature is greater than the temperature alarm threshold, triggering a charging high-temperature alarm; and starting alarm delay, and generating a charging high-temperature alarm instruction if the continuous trigger time exceeds the preset time.
In a preferred embodiment of the present invention, when the real-time temperature is less than the temperature alarm threshold, triggering a charging high-temperature release alarm; and starting alarm delay, and generating a charging high-temperature release alarm instruction if the continuous trigger time exceeds the preset time.
In a preferred embodiment of the present invention, when the real-time voltage is greater than the voltage alarm threshold, triggering a charging maximum voltage alarm; and starting alarm delay, and generating a highest charging voltage alarm instruction if the continuous trigger time exceeds the preset time.
In a preferred embodiment of the present invention, when the real-time voltage is smaller than the voltage alarm threshold, triggering a charging maximum voltage release alarm; and starting alarm delay, and generating a highest charging voltage release alarm instruction if the continuous trigger time exceeds the preset time.
In a preferred embodiment of the present invention, when the real-time current is greater than the current over-current alarm threshold, the current over-current alarm is triggered; and starting alarm delay, and generating a current overcurrent alarm instruction if the continuous trigger time exceeds the preset time.
In a preferred embodiment of the present invention, when the real-time current is smaller than the current overcurrent alarm threshold, a current overcurrent release alarm is triggered; and starting alarm delay, and generating a current overcurrent release alarm instruction if the continuous trigger time exceeds the preset time.
In a preferred embodiment of the present invention, when the real-time insulation value is greater than the resistance insulation leakage alarm threshold, triggering a resistance insulation leakage alarm; and starting alarm delay, and generating a resistance insulation leakage alarm instruction if the continuous trigger time exceeds the preset time.
In a preferred embodiment of the present invention, when the real-time insulation value is smaller than the resistance insulation leakage alarm threshold, triggering a resistance insulation leakage release alarm; and starting alarm delay, and generating a resistance insulation leakage release alarm instruction if the continuous trigger time exceeds the preset time.
In a preferred embodiment of the present invention, when the charge and discharge control device receives multiple types of alarm commands at the same time, the charge and discharge control device performs screening of protection measures according to the priority and executes an optimal processing scheme.
The embodiment of the invention has the beneficial effects that: according to the distributed energy storage equipment in the technical scheme, the charging and discharging states of the distributed energy storage equipment are monitored, fault detection and analysis alarming are carried out by acquiring real-time temperature, voltage, current and insulation value parameters, and operation processing such as current limiting and contactor disconnection of a distributed energy storage power station can be carried out in time according to the fault alarming condition under the alarming condition. When a plurality of faults trigger alarm at the same time, the optimal processing scheme can be intelligently screened and executed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a block diagram of an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.
The block diagrams shown in the figures are functional entities only and do not necessarily correspond to physically separate entities. I.e. these functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor means and/or microcontroller means.
The flow charts shown in the drawings are merely illustrative and do not necessarily include all of the contents and operations/steps, nor do they necessarily have to be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.
It will be understood that, although the terms first, second, third, etc. may be used herein to describe various components, these components should not be limited by these terms. These terms are used to distinguish one element from another. Thus, a first component discussed below may be termed a second component without departing from the teachings of the disclosed concept. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
It is to be understood by those skilled in the art that the drawings are merely schematic representations of exemplary embodiments, and that the blocks or processes shown in the drawings are not necessarily required to practice the present disclosure and are, therefore, not intended to limit the scope of the present disclosure. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
First embodiment
Referring to fig. 1, a charge and discharge protection method for a distributed energy storage device includes:
the method comprises the steps that real-time data of single batteries in distributed energy storage equipment are obtained through a charging and discharging protection unit, and the real-time data of temperature, voltage, current and insulation values are respectively measured through a temperature sensor, a voltage sensor, a current sensor and a resistance sensor; the temperature sensor, the voltage sensor, the current sensor and the resistance sensor transmit the real-time state parameters of the single battery to the charge-discharge protection unit according to a certain frequency;
the acquired real-time data are calculated, compared and analyzed in the charging and discharging protection unit, after the charging and discharging protection unit receives complete acquisition data once, the acquisition frequencies of the sensors in the embodiment are different, the complete data are analyzed and calculated to check the running states of the single battery and the whole battery pack, and alarm signals of corresponding types are triggered according to comparison and analysis results;
if the response time of the alarm signal exceeds the preset time, the charging and discharging protection unit generates an alarm instruction of a corresponding type;
sending the alarm instruction to a charge and discharge control device through ModBus communication to perform charge and discharge protection processing; when certain specific faults are analyzed or calculated, the fault reasons can be quickly and accurately positioned, and corresponding current limiting operation or contactor disconnection operation is carried out on the charging and discharging control equipment through the Modbus, so that the aim of protecting the single batteries and the whole battery pack is fulfilled.
When the parameters of the single battery or the battery pack are analyzed or calculated to be recovered to be normal, the triggered alarm can be quickly released, and the releasing current limiting operation is sent to the charging and discharging control equipment through the Modbus, so that the whole battery pack can be charged and discharged stably and efficiently again.
And when the charge and discharge control equipment receives a plurality of types of alarm instructions at the same time, the charge and discharge control equipment screens protective measures according to the priority of the alarm instructions and executes an optimal charge and discharge protection scheme.
More specifically, when the real-time temperature is greater than the temperature alarm threshold, triggering a charging high-temperature alarm; and starting alarm delay, and generating a charging high-temperature alarm instruction if the continuous trigger time exceeds the preset time. When the real-time temperature is smaller than the temperature alarm threshold value, triggering a charging high-temperature release alarm; and starting alarm delay, and generating a charging high-temperature release alarm instruction if the continuous trigger time exceeds the preset time. The embodiment provides a release recovery mechanism for generated fault alarm, the mechanism can quickly identify and judge whether the fault alarm of the equipment is released, and when the fault alarm is judged to be released, the current limit can be immediately released to quickly recover the battery to a normal working state.
More specifically, when the real-time voltage is greater than the voltage alarm threshold, triggering the highest charging voltage alarm; and starting alarm delay, and generating a highest charging voltage alarm instruction if the continuous trigger time exceeds the preset time. When the real-time voltage is smaller than the voltage alarm threshold value, triggering the highest charging voltage to release alarm; and starting alarm delay, and generating a highest charging voltage release alarm instruction if the continuous trigger time exceeds the preset time.
More specifically, when the real-time current is greater than the current overcurrent alarm threshold value, the current overcurrent alarm is triggered; and starting alarm delay, and generating a current overcurrent alarm instruction if the continuous trigger time exceeds the preset time. Triggering a current overcurrent release alarm when the real-time current is smaller than a current overcurrent alarm threshold value; and starting alarm delay, and generating a current overcurrent release alarm instruction if the continuous trigger time exceeds the preset time.
More specifically, when the real-time insulation value is larger than the resistance insulation leakage alarm threshold value, triggering resistance insulation leakage alarm; and starting alarm delay, and generating a resistance insulation leakage alarm instruction if the continuous trigger time exceeds the preset time. Triggering a resistance insulation leakage release alarm when the real-time insulation value is smaller than a resistance insulation leakage alarm threshold value; and starting alarm delay, and generating a resistance insulation leakage release alarm instruction if the continuous trigger time exceeds the preset time.
In conclusion, the charge and discharge protection method has strong real-time performance, accuracy, high efficiency and intelligence, can ensure that the battery can execute optimal operation and production strategies under different working conditions and generation environments on the premise of no need of manual operation and intervention, can also well ensure the safety of the battery, and greatly improves the service efficiency and the service cycle of the battery. The ultra-strong management, monitoring, regulation and recovery mechanism greatly reduces the maintenance, maintenance and replacement costs of the battery, and also avoids excessive energy consumption and battery loss in abnormal environments.
This description describes examples of embodiments of the invention, and is not intended to illustrate and describe all possible forms of the invention. It should be understood that the embodiments described in this specification can be implemented in many alternative forms. The figures are not necessarily to scale; some features may be exaggerated or minimized to show details of particular components. Specific structural and functional details disclosed are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention. It will be appreciated by persons skilled in the art that a plurality of features illustrated and described with reference to any one of the figures may be combined with features illustrated in one or more other figures to form embodiments which are not explicitly illustrated or described. The described combination of features provides a representative embodiment for a typical application. However, various combinations and modifications of the features consistent with the teachings of the present invention may be used as desired for particular applications or implementations.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A charge and discharge protection method for distributed energy storage equipment is characterized by comprising the following steps:
acquiring real-time data of single batteries in distributed energy storage equipment, wherein the real-time data comprises temperature, voltage, current and insulation values;
calculating, comparing and analyzing the acquired real-time data, and triggering alarm signals of corresponding types according to comparison and analysis results;
if the response time of the alarm signal exceeds the preset time, generating an alarm instruction of a corresponding type;
and sending the alarm instruction to a charge and discharge control device through a ModBus.
2. The charge-discharge protection method for the distributed energy storage equipment according to claim 1, wherein when the real-time temperature is greater than a temperature alarm threshold, a charge high-temperature alarm is triggered; and starting alarm delay, and generating a charging high-temperature alarm instruction if the continuous trigger time exceeds the preset time.
3. The charge-discharge protection method for the distributed energy storage equipment according to claim 1, wherein when the real-time temperature is less than a temperature alarm threshold, a charge high-temperature release alarm is triggered; and starting alarm delay, and generating a charging high-temperature release alarm instruction if the continuous trigger time exceeds the preset time.
4. The charge-discharge protection method for the distributed energy storage equipment according to claim 1, wherein when the real-time voltage is greater than a voltage alarm threshold, a highest-voltage-to-charge alarm is triggered; and starting alarm delay, and generating a highest charging voltage alarm instruction if the continuous trigger time exceeds the preset time.
5. The charge-discharge protection method for the distributed energy storage equipment according to claim 1, wherein when the real-time voltage is smaller than a voltage alarm threshold, a highest-voltage-to-charge-release alarm is triggered; and starting alarm delay, and generating a highest charging voltage release alarm instruction if the continuous trigger time exceeds the preset time.
6. The charge-discharge protection method for the distributed energy storage equipment according to claim 1, wherein when the real-time current is greater than a current overcurrent alarm threshold, a current overcurrent alarm is triggered; and starting alarm delay, and generating a current overcurrent alarm instruction if the continuous trigger time exceeds the preset time.
7. The charge-discharge protection method for the distributed energy storage equipment according to claim 1, wherein when the real-time current is smaller than a current overcurrent alarm threshold, a current overcurrent release alarm is triggered; and starting alarm delay, and generating a current overcurrent release alarm instruction if the continuous trigger time exceeds the preset time.
8. The charge-discharge protection method for the distributed energy storage equipment according to claim 1, wherein when the real-time insulation value is greater than a resistance insulation leakage alarm threshold value, a resistance insulation leakage alarm is triggered; and starting alarm delay, and generating a resistance insulation leakage alarm instruction if the continuous trigger time exceeds the preset time.
9. The charge-discharge protection method for the distributed energy storage equipment according to claim 1, wherein when the real-time insulation value is smaller than a resistance insulation leakage alarm threshold value, a resistance insulation leakage release alarm is triggered; and starting alarm delay, and generating a resistance insulation leakage release alarm instruction if the continuous trigger time exceeds the preset time.
10. The charging and discharging protection method for the distributed energy storage device according to claim 1, wherein when the charging and discharging control device receives a plurality of types of alarm commands at the same time, the charging and discharging control device performs protection measure screening according to priority and executes an optimal processing scheme.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111273500.9A CN114094656A (en) | 2021-10-29 | 2021-10-29 | Charging and discharging protection method for distributed energy storage equipment |
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| CN202111273500.9A CN114094656A (en) | 2021-10-29 | 2021-10-29 | Charging and discharging protection method for distributed energy storage equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115494404A (en) * | 2022-07-19 | 2022-12-20 | 广州杉和信息科技有限公司 | Storage battery pack online monitoring method |
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2021
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