CN107332266A - User side energy-accumulating power station and its application model - Google Patents
User side energy-accumulating power station and its application model Download PDFInfo
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- CN107332266A CN107332266A CN201710742489.3A CN201710742489A CN107332266A CN 107332266 A CN107332266 A CN 107332266A CN 201710742489 A CN201710742489 A CN 201710742489A CN 107332266 A CN107332266 A CN 107332266A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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Abstract
The invention discloses a kind of user side energy-accumulating power station and its application model, wherein, energy-accumulating power station includes energy-storage battery, battery management system, energy storage Bidirectional variable-flow system, monitoring system and distribution system；Energy storage Bidirectional variable-flow system, connects energy-storage battery, load and power network respectively；In the paddy section electricity price period, energy storage Bidirectional variable-flow system obtains electric energy from power network, is delivered to energy-storage battery and is stored；In the crest segment electricity price period, energy storage Bidirectional variable-flow system uses the electrical energy transportation stored in energy-storage battery to low-voltage bus bar for load；Monitoring system, connection energy-storage battery, battery management system, energy storage Bidirectional variable-flow system, for the setting according to user, the working condition to energy-storage battery, battery management system, energy storage Bidirectional variable-flow system is monitored.The present invention realizes the functions such as corresponding peak load shifting, Demand-side, quality of power supply improvement, emergency power, reactive-load compensation, reduces the electric cost of user by user side energy-accumulating power station and its application model.
Description
Technical field
The present invention relates to technical field of electric power, more particularly to a kind of user side energy-accumulating power station and its application model.
Background technology
With the development and the raising of living standards of the people of society, electricity needs is growing.However, most of user sides
Demand for electric power is concentrated mainly on the peak period on daytime, so the electric cost of user is higher.At present, some industry enterprises
Owner will reduce electric cost by the modes such as production of avoiding the peak hour.It is (i.e. non-that the electricity consumption of advanced manufacturing industry is broadly divided into responsive type load
Orderly closedown can cause product rejection, device damage or trigger environmental problem) and conventional load (i.e. disorderly closedown will not cause
Serious economic loss).Advanced manufacturing industry would generally be responsive type load configuration UPS (uninterrupted power source), to prevent voltage temporary
Drop and influence of the short interruptions to production, eliminate what is produced in power electronic equipment operation by configuring APF (active filter)
Harmonic pollution, configuration SVG (dynamic passive compensation and harmonic treating apparatus) or FC (high-tension electricity wave filter) carry out reactive-load compensation,
To meet the power factor command of examination point, so that reaching improves the target of the quality of power supply.Industry and commerce user need to be according to transformer
Capacity or maximum demand pay basic charge as per installed capacity to power supply department, but the peak load of electricity consumption is when often focusing on some
Section, the power load on peak can increase demand charge in short-term.
But, due to above-mentioned by the way of the lifting power quality such as UPS, SVG, cost is higher, so causing user side
Acceptance it is not high.
The content of the invention
Based on this, the present invention proposes a kind of user side energy-accumulating power station and its application model, can effectively reduce electricity consumption high
The network load of peak period, reduces paying for demand charge, substantially reduces the electric cost of user.
The user side energy-accumulating power station that the present invention is provided, including energy-storage battery, battery management system, energy storage Bidirectional variable-flow system
And monitoring system；
The energy-storage battery is used to store electric energy；
The battery management system, the connection energy-storage battery, the status information for gathering the energy-storage battery in real time,
And management and control is carried out to the working condition of the energy-storage battery according to the status information of the energy-storage battery；
The energy storage Bidirectional variable-flow system, connects the energy-storage battery, load and power network respectively；
In the default paddy section electricity price period, the energy storage Bidirectional variable-flow system obtains electric energy from power network, is delivered to institute
Energy-storage battery is stated to be stored；In the default crest segment electricity price period, the energy storage Bidirectional variable-flow system is by the energy-storage battery
The electrical energy transportation of middle storage is used to low-voltage bus bar for load；
The monitoring system, connects the energy-storage battery, battery management system, energy storage Bidirectional variable-flow system, for basis
The setting of user, the working condition to the energy-storage battery, battery management system, energy storage Bidirectional variable-flow system is monitored.
Further, user side energy-accumulating power station of the invention also includes distribution system；
The distribution system connects the energy storage Bidirectional variable-flow system；
The electric energy stored in the energy-storage battery is delivered to by the energy storage Bidirectional variable-flow system by the distribution system
Low-voltage bus bar, is used for load.
Further, user side energy-accumulating power station of the invention also includes Steam Generator in Load Follow device；
The Steam Generator in Load Follow device connects the monitoring system；
The Steam Generator in Load Follow device is used for the electric power of real-time monitoring user-side, and Monitoring Data is sent to the prison
Control system；When the electric power for monitoring user side exceedes default maximum demand, the monitoring system controls the energy storage
Bidirectional variable-flow system, the electrical energy transportation stored in the energy-storage battery to low-voltage bus bar is used for load, stabilized beyond maximum
The power of requirement part.
As a kind of embodiment, the status information of the energy-storage battery includes：The voltage of battery, electric current, temperature, lotus
One or more of information in electricity condition, battery capacity, internal resistance.
As a kind of embodiment, the battery management system be additionally operable to the energy-storage battery carry out overcharge protection,
Cross prevention and short-circuit protection.
Based on same inventive concept, the present invention also provides a kind of application model of user side energy-accumulating power station, including following step
Suddenly：
When line voltage is normal：In the default paddy section electricity price period, the energy storage Bidirectional variable-flow system is from power network
Electric energy is obtained, the energy-storage battery is delivered to and is stored；In default crest segment electricity price period, the energy storage Bidirectional variable-flow system
The electrical energy transportation that will be stored in the energy-storage battery unite to low-voltage bus bar, is used for load；
When line voltage is interrupted：Dynamic Voltage Regulator cuts off the company of sensitive loads and power network by solid-state relay
Connect, the power supply of the preset time of sensitive loads first is kept with the energy in super capacitor；Meanwhile, the energy storage Bidirectional variable-flow system
In the second preset time, 380V busbar voltages are re-established in the case of zero load；Second preset time is less than described
First preset time；
After line voltage recovery：The energy storage Bidirectional variable-flow system by the amplitude, phase, frequency of output voltage adjust to
After identical with the parameter of power network, being sent to asynchronous switch-on device can judge grid-connected with grid-connected application, asynchronous switch-on device
After condition is met, lead-in circuit breaker closes a floodgate grid-connected.
As a kind of embodiment, the application model of user side energy-accumulating power station of the invention is further comprising the steps of：
According to the difference of different periods time-of-use tariffs, the charge and discharge control strategy of default energy-accumulating power station is selected, in low electricity
The electric power storage of valency area, the electric discharge of high electricity price area.
As a kind of embodiment, the charge and discharge control strategy of the default energy-accumulating power station is：
In January to June, September to December, energy-accumulating power station charges in the paddy electricity period, and peak electricity period electric discharge, the ordinary telegram period is in
Holding state；
In July to August part, energy-accumulating power station charges in the paddy electricity period, and peak electricity period electric discharge, ordinary telegram period supplement electricity 1 to 3 is small
When, remaining period is in holding state.
As a kind of embodiment, the application model of user side energy-accumulating power station of the invention is further comprising the steps of：
Determine whether energy-storage system requires supplementation with according to the power consumption of the residual capacity of battery pack and evening peak electric or standby.
The present invention is compared to the beneficial effect of prior art：
User side energy-accumulating power station and its application model that the present invention is provided, in the default paddy section electricity price period, from power network
Middle acquisition electric energy, is charged；In the default crest segment electricity price period, discharged, used for load.By peak load shifting,
The electric cost of user is substantially reduced, while reducing the input cost of the equipment such as UPS, and can realize that Demand-side is corresponding, electric
The functions such as the improvement of energy quality, emergency power supply, reactive-load compensation.
Brief description of the drawings
Fig. 1 is the structural representation for the user side energy-accumulating power station that the embodiment of the present invention one is provided；
Fig. 2 is that the user side energy-accumulating power station provided using the embodiment of the present invention one realizes that peak load shifting, demand charge are managed
Principle schematic；
Fig. 3 is that the application model of the user side energy-accumulating power station provided using the embodiment of the present invention three lifts opening up for power quality
Flutter figure.
Embodiment
Below in conjunction with accompanying drawing, the technical characteristic above-mentioned and other to the present invention and advantage are clearly and completely described,
Obviously, described embodiment is only the section Example of the present invention, rather than whole embodiments.
The user side energy-accumulating power station provided referring to Fig. 1, the embodiment of the present invention one, mainly includes energy-storage battery 100, cell tube
Reason system 200, energy storage Bidirectional variable-flow system 300 and monitoring system 400.
Wherein, energy-storage battery 100 is used to store electric energy, can have multiple battery packs in parallel to constitute, possess high security,
The features such as energy efficiency height, long-life, technology maturation, high performance-price ratio.
Battery management system 200 connects energy-storage battery 100, the status information for gathering energy-storage battery 100 in real time, for example
The information such as voltage, electric current, temperature, state-of-charge, battery capacity, the internal resistance of battery, and according to the status information of energy-storage battery 100
Working condition to energy-storage battery 100 carries out management and control, and progress overcharges protection, Cross prevention and short-circuit protection etc., realizes to storage
The balanced management of energy battery, balance policy.
Energy storage Bidirectional variable-flow system 300 connects energy-storage battery 100, load and power network respectively.Energy storage in the present embodiment
Bidirectional variable-flow system 300, in the default paddy section electricity price period, electric energy can be obtained from power network, energy-storage battery 100 is delivered to
Stored；In the default crest segment electricity price period, by the electrical energy transportation stored in energy-storage battery 100 to low-voltage bus bar, for negative
Load is used.Energy storage Bidirectional variable-flow system 300 can be using Modularized current transformer design, and high conversion efficiency, reliability are high, control plan
It is slightly excellent, combination is flexibly configured, System Expansion is very convenient, can effectively prevent that circulation when multi-string battery group is accessed is consistent
The problems such as property.
Energy-accumulating power station can also include distribution system 500, and energy storage Bidirectional variable-flow system 300 will be stored in energy-storage battery 100
Electric energy low-voltage bus bar can be delivered to by distribution system 500, for load use.
The connection of monitoring system 400 energy-storage battery 100, battery management system 200, energy storage Bidirectional variable-flow system 300, for root
According to the setting of user, the working condition to energy-storage battery 100, battery management system 200, energy storage Bidirectional variable-flow system 300 is carried out
Monitoring.Monitoring system 400 can use Rotating fields, including information gathering is monitored with key-course, information concentrated layer and energy on the spot
Layer, is monitored and controls to whole energy-accumulating power station, realizes that on-road efficiency is maximized.
The user side energy-accumulating power station that embodiment one is provided, for a user, without any cost and risk, while may be used also
To obtain the income of a part of peak load shifting, demand charge, referring to Fig. 2.
Specifically, user side energy-accumulating power station can realize that the function of peak load shifting, i.e. paddy electricity period charge, and the peak electricity period puts
Electricity, electricity price between peak and valley as power station income.For example, big 1-10 kilovolt sides of commercial power, the electricity price of peak electricity period on daytime is
1.1002 yuan/kilowatt hour, electricity price is 0.3200 yuan/kilowatt hour the paddy electricity period in the evening, and electricity price between peak and valley is up to 0.7802 yuan/kilowatt
When, and peak electricity was for up to 8 hours, and energy-accumulating power station often discharges 1MWh, you can 780.2 yuan of income.
As can be seen here, the user side energy-accumulating power station that embodiment one is provided passes through peak load shifting, it is possible to achieve demand charge pipe
Reason, substantially reduces the electric cost of user, while reducing the input cost of the equipment such as UPS.
In addition, the user side energy-accumulating power station that the embodiment of the present invention one is provided can be provided the user with tight as uninterrupted power source
Anxious standby electricity, while the improvement quality of power supply can be provided.
For example, user according to the regulation of peak interval of time electrovalence policy, can set the discharge and recharge period of energy-accumulating power station, that is, exist
The paddy area period obtains electricity using low electricity price from power network, and Er Feng areas (or spike) period is discharged using energy-accumulating power station, is reduced therebetween
Power network power consumption, can not only reduce use Voltage force of the power network in peak period, and user can utilize electricity price between peak and valley drop
Low electric cost expenditure, so as to obtain income.
Further, user can set the mode of operation of the energy-accumulating power station of the invention provided according to grid costs difference,
I.e. according to the difference of peak (spike) paddy electricity valency, the charge and discharge control strategy of energy-accumulating power station day part is set, electric energy management is carried out, with
Reach the effect of Demand Side Response.
For example：1~June and 9~December, the operation reserve of energy-accumulating power station is：The paddy electricity period charges, and the peak electricity period puts
Electricity, the ordinary telegram period is in holding state, can be determined during this period according to the residual capacity of energy-storage battery and the power consumption of evening peak
Whether energy-accumulating power station requires supplementation with electric or standby；
7~August part, the operation reserve of energy-accumulating power station is：The paddy electricity period charges, peak (spike) electricity period electric discharge, during ordinary telegram
Section supplement electricity two hours, remaining period is standby.Energy-accumulating power station completes 1 charge and discharge cycles daily, that is, completes to store in low electricity price area
The process of electric, high electricity price area electric discharge.
The user side energy-accumulating power station that the embodiment of the present invention two is provided also includes Steam Generator in Load Follow on the basis of embodiment one and filled
Put.Steam Generator in Load Follow device connects monitoring system, and Steam Generator in Load Follow device is used for the electric power of real-time monitoring user-side, and will monitoring
Data are sent to monitoring system；When the electric power for monitoring user side exceedes default maximum demand, monitoring system control
Energy storage Bidirectional variable-flow system, the electrical energy transportation stored in energy-storage battery to low-voltage bus bar is used for load, stabilized beyond maximum
The power of requirement part.
The user side energy-accumulating power station configuration load tracks of device that the embodiment of the present invention two is provided, can carry out effective load
Tracking, the electric power situation of real-time monitoring user-side, when electric power exceedes maximum demand, energy-accumulating power station star t-up discharge,
The power beyond maximum demand part is stabilized, so as to reach the purpose of user side demand charge management.Main transformer height is integrated simultaneously
The power and user power utilization situation of side are pressed, the control strategy run by energy-accumulating power station reduces the load of peak period, and reducing needs
Paying for the amount electricity charge, reduces the electric cost of user.
Referring to Fig. 3, based on same inventive concept, the embodiment of the present invention three also provides a kind of application of user side energy-accumulating power station
Pattern, can be effectively improved power quality, specific as follows：
When line voltage is normal：In the default paddy section electricity price period, PCS (energy storage Bidirectional variable-flow system) is from power network
Electric energy is obtained, energy-storage battery is delivered to and is stored；In the default crest segment electricity price period, PCS will be stored in energy-storage battery
Electrical energy transportation is used to low-voltage bus bar for load；DVR (Dynamic Voltage Regulator) is in holding state in parallel, and sensitive loads are led to
Cross SSR (solid-state relay) normal power supply.
During line voltage transient disturbance (for example, disturbance duration is less than 0.5 second)：DVR takes from the super capacitor of itself
Energy and output voltage, SSR shut-offs, all processes are no more than 1 millisecond, and DVR powers as voltage source to sensitive loads, keep sensitivity
The normal work of load.After line voltage transient disturbance is eliminated, SSR conductings, sensitive loads transfer to power network to power again.
When line voltage is interrupted：DVR cuts off the connection of sensitive loads and power network by SSR, with the energy in super capacitor
Amount keeps the power supply of the preset time of sensitive loads first；Meanwhile, energy storage Bidirectional variable-flow system is in the second preset time, in zero load
In the case of re-establish 380V busbar voltages；Second preset time is less than the first preset time.For example, DVR relies on SSR 1
The time internal cutting off sensitive loads of millisecond and contacting for power network, the sensitive loads confession of 0.5 second is kept with the energy in super capacitor
Electricity.Due to decompression, 10kV service entrance switch disconnects, and PCS re-establishes 380V female within the time of 0.2 second in the case of zero load
Line voltage.DVR detect busbar voltage recover after, can by the frequency, phase, range-adjusting of load-side supply voltage to and bus
Voltage is identical, then turns on SSR, and sensitive loads transfer to the energy-accumulating power station under PCS controls to power.
After line voltage recovery：PCS adjusts the amplitude, phase, frequency of output voltage to complete with the parameter of power network
After identical, being sent to asynchronous switch-on device can be with grid-connected application, and after asynchronous switch-on device judges that grid-connected conditions are met, inlet wire breaks
Road device closes a floodgate grid-connected.
Further, the application model of user side energy-accumulating power station of the invention, further comprising the steps of：
According to the difference of different periods time-of-use tariffs, the charge and discharge control strategy of default energy-accumulating power station is selected, in low electricity
The electric power storage of valency area, the electric discharge of high electricity price area, realize energy pipe, to reach the effect of Demand Side Response.
By taking Jiangsu Province as an example, according to the regulation of Jiangsu Province's peak interval of time electrovalence policy in 2016, filling for energy-storage system is determined
Discharge the period, the Ji Gu areas period utilizes low electricity price, Er Feng areas (or spike) period energy storage system discharges reduce electricity therebetween
Net power consumption, can not only reduce use Voltage force of the power network in peak period, and enterprise can utilize electricity price between peak and valley reduction
Electric cost expenditure, so as to obtain income.
Specially：1~June and 9~December, the operation reserve of energy-accumulating power station is：The paddy electricity period charges, the peak electricity period
Electric discharge, the ordinary telegram period is in holding state, can be determined during this period according to the residual capacity of battery pack and the power consumption of evening peak
Whether energy-storage system requires supplementation with electric or standby；7~August part, the operation reserve of energy-accumulating power station is：
The paddy electricity period charges, the period electric discharge of peak (spike) electricity, ordinary telegram period supplement electricity 1 to 3 hour, and remaining period is standby.
So, energy-accumulating power station completes 1 charge and discharge cycles daily, that is, completes the process in the electric power storage of low electricity price area, the electric discharge of high electricity price area.
User side energy-accumulating power station and its application model of investment+operation that the present invention is provided, are filled out by energy-accumulating power station peak clipping
The application functions such as paddy, Demand-side are corresponding, quality of power supply improvement, emergency power, reactive-load compensation, substantially reduce the electric cost of user
And improve electricity consumption reliability.Simultaneously investment+operation commercialization pattern be similar to Energy Management Contract (EPC) pattern, by with visitor
Family sign energy conservation service contract, can be provided for client including：With electrodiagnosis, Project design, the project financing, equipment purchase, work
A whole set of the energy conservation services such as journey construction, equipment installation debugging, staff training, energy-saving metering confirmation and guarantee, and enter from client
Recoup capital outlay and derive a profit in the energy-saving benefit obtained after row reducing energy consumption.The commercialization pattern that the present invention is provided is by user
Effective Revenue Sharing Mechanism is formed between the financial institutions such as investment subject, the energy storage sector funds such as end, third party's energy storage enterprise,
Accelerate the commercialization sizable application of propulsion energy storage.
Particular embodiments described above, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, it will be appreciated that the foregoing is only the specific embodiment of the present invention, the protection being not intended to limit the present invention
Scope.Particularly point out, to those skilled in the art, within the spirit and principles of the invention, that is done any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (9)
1. a kind of user side energy-accumulating power station, it is characterised in that including energy-storage battery, battery management system, energy storage Bidirectional variable-flow system
System and monitoring system；
The energy-storage battery, for storing electric energy；
The battery management system, connects the energy-storage battery, the status information for gathering the energy-storage battery in real time, and root
Management and control is carried out to the working condition of the energy-storage battery according to the status information of the energy-storage battery；
The energy storage Bidirectional variable-flow system, connects the energy-storage battery, load and power network respectively；
In the default paddy section electricity price period, the energy storage Bidirectional variable-flow system obtains electric energy from power network, is delivered to the storage
Energy battery is stored；In the default crest segment electricity price period, the energy storage Bidirectional variable-flow system will be deposited in the energy-storage battery
The electrical energy transportation of storage is used to low-voltage bus bar for load；
The monitoring system, connects the energy-storage battery, battery management system, energy storage Bidirectional variable-flow system, for according to user
Setting, the working condition to the energy-storage battery, battery management system, energy storage Bidirectional variable-flow system is monitored.
2. user side energy-accumulating power station according to claim 1, it is characterised in that also including distribution system；
The distribution system connects the energy storage Bidirectional variable-flow system；
The electric energy stored in the energy-storage battery is delivered to low pressure by the energy storage Bidirectional variable-flow system by the distribution system
Bus, is used for load.
3. user side energy-accumulating power station according to claim 1 or 2, it is characterised in that also including Steam Generator in Load Follow device；
The Steam Generator in Load Follow device connects the monitoring system；
The Steam Generator in Load Follow device is used for the electric power of real-time monitoring user-side, and Monitoring Data is sent to the monitoring system
System；When the electric power for monitoring user side exceedes default maximum demand, the monitoring system controls the energy storage two-way
Converter system, by the electrical energy transportation stored in the energy-storage battery to low-voltage bus bar, uses for load, stabilizes beyond maximum demand
Partial power.
4. user side energy-accumulating power station according to claim 3, it is characterised in that the status information bag of the energy-storage battery
Include：One or more of information in the voltage of battery, electric current, temperature, state-of-charge, battery capacity, internal resistance.
5. user side energy-accumulating power station according to claim 3, it is characterised in that the battery management system is additionally operable to institute
Energy-storage battery is stated to carry out overcharging protection, Cross prevention and short-circuit protection.
6. the application model of the user side energy-accumulating power station as described in any one of claim 1 to 5, it is characterised in that including following
Step：
When line voltage is normal：In the default paddy section electricity price period, the energy storage Bidirectional variable-flow system is obtained from power network
Electric energy, is delivered to the energy-storage battery and is stored；In the default crest segment electricity price period, the energy storage Bidirectional variable-flow system will
The electrical energy transportation stored in the energy-storage battery is used to low-voltage bus bar for load；
When line voltage is interrupted：Dynamic Voltage Regulator cuts off the connection of sensitive loads and power network by solid-state relay, with
Energy in super capacitor keeps the power supply of the preset time of sensitive loads first；Meanwhile, the energy storage Bidirectional variable-flow system is
In two preset times, 380V busbar voltages are re-established in the case of zero load；Second preset time is less than described first
Preset time；
After line voltage recovery：The energy storage Bidirectional variable-flow system by the amplitude, phase, frequency of output voltage adjust to electricity
After the parameter of net is identical, grid-connected conditions can be judged with grid-connected application, asynchronous switch-on device by being sent to asynchronous switch-on device
After satisfaction, lead-in circuit breaker closes a floodgate grid-connected.
7. the application model of user side energy-accumulating power station as claimed in claim 6, it is characterised in that further comprising the steps of：
According to the difference of different periods time-of-use tariffs, the charge and discharge control strategy of default energy-accumulating power station is selected, in low electricity price area
Electric power storage, the electric discharge of high electricity price area.
8. the application model of user side energy-accumulating power station as claimed in claim 7, it is characterised in that the default energy-accumulating power station
Charge and discharge control strategy be：
In January to June, September to December, energy-accumulating power station charges in the paddy electricity period, the period electric discharge of peak electricity, and the ordinary telegram period is in standby
State；
In July to August part, energy-accumulating power station charges in the paddy electricity period, the period electric discharge of peak electricity, ordinary telegram period supplement electricity 1 to 3 hour,
Remaining period is in holding state.
9. the application model of user side energy-accumulating power station as claimed in claim 8, it is characterised in that further comprising the steps of：
Determine whether energy-storage system requires supplementation with according to the power consumption of the residual capacity of battery pack and evening peak electric or standby.
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