CN208386245U - A kind of peak load shifting mixed energy storage system - Google Patents
A kind of peak load shifting mixed energy storage system Download PDFInfo
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- CN208386245U CN208386245U CN201820043286.5U CN201820043286U CN208386245U CN 208386245 U CN208386245 U CN 208386245U CN 201820043286 U CN201820043286 U CN 201820043286U CN 208386245 U CN208386245 U CN 208386245U
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Abstract
The utility model discloses a kind of peak load shifting mixed energy storage systems, are related to technical field of energy storage.The energy-storage units of mixed energy storage system are made of high-capacity lithium battery group and super capacitor group, and the energy density of lithium battery is combined greatly with the power density of supercapacitor greatly, the advantage of different energy storage technologies is played.According to the electricity using at the peak time time, the rationally scientific automatic control and management of charge and discharge process is carried out to lithium battery group and super capacitor group using monitoring system, in power grid electricity consumption peak period, by the electric energy of energy-storage units storage, actively to meet user power utilization demand, insufficient section is supplemented by power grid for release, with the level value period, it is user load power supply by power grid, energy-storage system stops working, in the valley period, it is powered from power grid to user load, and charged for the energy-storage system in feed condition.Mixed energy storage system can realize the peak load shifting of power grid in the case where not influencing user's normal electricity consumption, and the peak load for reducing power grid is poor, reduce electric cost.
Description
Technical field
The utility model relates to energy-storage system technical fields, more particularly to a kind of peak load shifting mixed energy storage system.
Background technique
With the fast development of national economy, upgrading adjustment, the continuous improvement of living standards of the people of the industrial structure, society
Demand of the various aspects to electric power increased dramatically, and the supply of electric power does not catch up with the needs of development, leads to imbalance between power supply and demand
Continuous aggravation.
In order to alleviate the pressure of power tense, policy is launched respectively in various regions, and it is some such as function to have gone out guarantee in peak of power consumption
The normal electricity consumptions such as department, hospital, school, ration the power supply to enterprise and zone user, and carry out " avoiding the peak hour " preferential electricity price, pass through economic thick stick
Bar encourages enterprise " peak load shifting ".However, peak load shifting needs to change enterprise's production daily schedule, to the normal production and operation of enterprise
It makes a big impact.
Therefore, user is helped to carry out peak load shifting in the case where not changing consumption habit, it not only can be to avoid to normal
The influence of life and production and operating activities, additionally it is possible to reduce electric cost.For power grid, the benefit of power grid can be also significantly improved
With rate, system loss is reduced.Effective energy storage technology then can be very good to realize this target.
Lithium battery is a kind of accumulator that energy storage and conversion are realized by reversible electrochemical reaction, with LiFePO4
For active material lithium ion battery energy density with higher, lower manufacturing cost and long service life the features such as,
But since its power density is low, high power discharge should not be carried out.
Supercapacitor is a kind of new type of energy storage device occurred in recent years, it has good power characteristic, Ke Yi great
It is many advantages, such as electric current, high efficiency, quick charge and discharge, service life cycle is long, just increasingly developed to become a kind of efficient, practical
Energy storage device.But its disadvantage is also more apparent, energy density compared with lithium battery it is lower, store little energy, maintain it
The time of power characteristic is short.
Therefore, individually a kind of energy storage technology is all difficult to take into account safe and reliable, high power/energy density, high efficiency, length completely
The many aspects such as service life, low cost.And hybrid energy-storing form is used, and the energy-storage system of different performance is combined, it can be abundant
The advantage of different energy storage technologies is played, to meet various demands such as power and energy, this will be distributed energy storage technology
Development and application trend.
Utility model content
The purpose of this utility model is to provide a kind of mixed energy storage system devices that can satisfy peak load shifting requirement, lead to
It crosses and charges when electricity price is low, discharge when electricity price is high, user is helped to carry out peak load shifting in the case where not changing consumption habit, drop
Low electric power consumption cost.
To achieve the goals above, the utility model adopts the following technical solution:
A kind of peak load shifting mixed energy storage system, including energy-storage units, bidirectional energy converting system, monitoring system composition,
The bidirectional energy converting system is connect with power grid and energy-storage units respectively, the monitoring system and bidirectional energy converting system and
Energy-storage units connection.Wherein, lithium battery group, super capacitor group and management system constitute energy-storage units, mixed energy storage system according to
Power grid peak interval of time adjusts the operation control method of energy-storage units to meet enterprise's normal electricity consumption demand.
To meet user's large capacity power demand, lithium battery group energy-storage module is formed by single lithium battery series/parallel combination；
To meet the high-power power requirement of user, super capacitor group energy-storage module is by supercapacitor monomer series/parallel group
It closes；
Energy-storage units management system is made of lithium battery management system BMS and super capacitance management system CMS, passes through monitoring
The various states of lithium battery group and supercapacitor group, including voltage, electric current, temperature, state-of-charge, health status etc., to storage
Can unit be charged and discharged process and carry out safety management, prevent from overcharging, over-discharge, the failure being likely to occur alarmed and met an urgent need
Protection processing guarantees safe and reliable, the stable operation of energy-storage system, and the fortune to lithium battery module and super-capacitor module
Row carries out control optimization, reduces lithium battery module charge and discharge cycles number, prolongs the service life.
Bidirectional energy converting system, that is, two-way DC/AC inversion system, two-way DC/AC inversion system both can be external electrical network
Converting high-voltage alternating current into low-voltage direct current be stored into energy-storage units, and the low-voltage DC of energy-storage units can be converted into
High Level AC Voltage is used for load.
Monitoring system is made of data collecting card, data operation processor, I/O module and communication module.It is mainly used for supervising
It surveys, manage and control each component of mixed energy storage system, and control strategy is provided, issue control instruction.Such as pass through control strategy reality
Now to the orderly control of energy-storage units charge and discharge process；It is realized by control strategy to the equal of energy-storage units voltage and state-of-charge
Weighing apparatus management etc.；Two-way controllable active and reactive power is provided for system by control strategy, realizes system active and reactive power
Balance.
Monitoring system can terminate energy-storage units electric discharge when meeting following any condition by bidirectional energy converting system
Process: the peak period discharge process end time arrives；Energy-storage units discharge capacity reaches default minimum；Energy-storage units management system
System monitors the abnormal conditions of battery parameter, including electric voltage exception, temperature anomaly or capacity exception.
Monitoring system can terminate energy-storage system charging when meeting following any condition by bidirectional energy converting system
Process: charging process end time valley period arrives；Energy-storage units charging capacity reaches preset maximum value；Energy-storage units management system
System monitors the abnormal conditions of battery parameter, including electric voltage exception, temperature anomaly or capacity exception.
The utility model is carried out orderly according to network load characteristic using charge and discharge process of the monitoring system to energy-storage units
Control, the i.e. period at electricity consumption peak actively discharge the electric energy of energy-storage units storage to meet user power utilization demand, insufficient section
It is supplemented by power grid；It is that user load is powered by power grid, energy-storage system stops working with the level value period；In the valley period, by
Power grid is powered to user load, and is charged for the energy-storage system in feed condition.Power grid peak load shifting is realized with this, is subtracted
The peak load of minor scale power net is poor, reduces user power utilization cost.
Detailed description of the invention
It, below will be to needed in embodiment description in order to illustrate more clearly of the technical solution of the utility model
Attached drawing is briefly described.
Fig. 1 is the peak load shifting mixed energy storage system working principle diagram of the utility model.
Fig. 2 is high-capacity lithium battery group building form schematic diagram.
Fig. 3 is super capacitor group building form schematic diagram.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing:
The principles of the present invention and feature are described below in conjunction with attached drawing, example is served only for explaining that this is practical
It is novel, it is not intended to limit the scope of the utility model.
Case study on implementation:
Power grid power load of different periods in one day is different, and the power load relatively high period is commonly referred to as peak
It is worth the period, the power load relatively low period is known as the valley period.The many areas in China phase is formulated according to land used load condition
Corresponding time-of-use tariffs, i.e., use high electricity price in peak period, uses low electricity price in the valley period, is flat between peak interval of time
Electricity price.In the peak period for determining power grid and after the valley period, filled using energy-storage system in peak period electric discharge, valley period
Electricity is orderly controlled, and the peak load shifting to power grid can be realized.
It is as shown in Figure 1 the utility model peak load shifting mixed energy storage system working principle diagram.Peak load shifting hybrid energy-storing
System include: super capacitor energy-storage module, lithium battery energy storage battery module, energy-storage units management system, bidirectional energy converting system and
Monitoring system, wherein bidirectional energy converting system is connect with power grid and energy-storage units respectively, and monitoring system and bidirectional energy are converted
System is connected with energy-storage units.
Because by battery cell end voltage is low, specific energy and specific power are limited, the not high factor of charge-discharge magnification is restricted, greatly
Capacity battery system (LCBS) is generally made of after series-parallel numerous battery cells.By battery cell through series/parallel at
The mode of LCBS is more, the burst mode of the utility model lithium battery group are as follows: elder generation's shape after series/parallel by multiple battery cells
Battery strings are connected at battery module (Battery Module, BM), then by multiple battery modules, are finally passed through by multiple battery strings
Be formed in parallel LCBS.It is illustrated in figure 2 LCBS burst mode schematic diagram, battery system is formed in parallel by m battery strings, often
A battery strings are formed by n battery cell or block coupled in series.
Likewise, also by using multiple super capacitor monomers in series and parallel to reach required in super capacitor energy-storage module
Voltage and power grade.For improving series RC model, the block structure such as Fig. 3 for the super capacitor group that the utility model uses
It is shown.Assuming that each equal indifference of super capacitor monomer, the series-parallel number of monomer is respectively n, m in super capacitor group.Equivalent circuit
In, Rs characterizes the heating loss inside super capacitor, and the caused pressure drop in charge and discharge process.Parallel equivalent resistance Rp
Referred to as leak resistance characterizes the leakage current effects of super capacitor, is the parameter for influencing the long-term energy storage of super capacitor.
The electric energy of energy-storage units storage is actively discharged to meet use in electricity consumption peak period according to network load characteristic
Family power demand, insufficient section are supplemented by power grid；It is that user load is powered by power grid, energy-storage system stops with the level value period
Only work；It in the valley period, is powered from power grid to user load, and charged for the energy-storage system in feed condition.
Monitoring system terminates energy-storage units discharge process when meeting following any condition: peak period discharge process terminates
Time arrives；Energy-storage units discharge capacity reaches default minimum；Energy-storage units management system monitors the abnormal feelings of battery parameter
Condition, including electric voltage exception, temperature anomaly or capacity are abnormal.
Monitoring system terminates energy-storage system charging process when meeting following any condition: valley period charging process terminates
Time arrives；Energy-storage units charging capacity reaches preset maximum value；Energy-storage units management system monitors the abnormal feelings of battery parameter
Condition, including electric voltage exception, temperature anomaly or capacity are abnormal.
Claims (6)
1. a kind of peak load shifting mixed energy storage system, comprising: energy-storage units, bidirectional energy converting system and monitoring system, it is described
Bidirectional energy converting system is connect with power grid and energy-storage units respectively, the monitoring system and bidirectional energy converting system and energy storage
Unit connection.
2. system according to claim 1, which is characterized in that the energy-storage units include lithium battery group, super capacitor group
And management system；Monitoring system collects energy-storage units and load information by management system, according to preset peak interval of time pair
Energy-storage units issue charge and discharge instruction, and are realized by power grid by bidirectional energy converting system to energy-storage units, and by energy storage
Unit meets the peak load shifting demand of user to the two-way inversion of load.
3. system according to claim 2, which is characterized in that the lithium battery group is made of single battery series/parallel
Lithium battery group at.
4. system according to claim 2, which is characterized in that the super capacitor group is by super capacitor monomer series/parallel
Composition.
5. system according to claim 1, which is characterized in that when meeting following any condition, monitoring system passes through double
Terminate energy-storage units discharge process to energy conversion system: 1) the peak period discharge process end time arrives；2) energy-storage units are put
Capacitance reaches default minimum；3) energy-storage units management system monitors the abnormal conditions of battery parameter, including electric voltage exception,
Temperature anomaly or capacity are abnormal.
6. system according to claim 1, which is characterized in that when meeting following any condition, monitoring system passes through double
Terminate energy-storage units charging process to energy conversion system: 1) charging process end time valley period arrives；2) energy-storage units fill
Capacitance reaches default peak；3) energy-storage units management system monitors the abnormal conditions of battery parameter, including electric voltage exception,
Temperature anomaly or capacity are abnormal.
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| CN201820043286.5U CN208386245U (en) | 2018-01-11 | 2018-01-11 | A kind of peak load shifting mixed energy storage system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113129159A (en) * | 2019-12-30 | 2021-07-16 | 廊坊光华热处理表面工程有限公司 | Energy storage peak-valley electricity regulation and utilization method for metal heat treatment |
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2018
- 2018-01-11 CN CN201820043286.5U patent/CN208386245U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113129159A (en) * | 2019-12-30 | 2021-07-16 | 廊坊光华热处理表面工程有限公司 | Energy storage peak-valley electricity regulation and utilization method for metal heat treatment |
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