CN106208386A - A kind of intelligent switch control method being applicable to family's micro-capacitance sensor - Google Patents
A kind of intelligent switch control method being applicable to family's micro-capacitance sensor Download PDFInfo
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- CN106208386A CN106208386A CN201610781267.8A CN201610781267A CN106208386A CN 106208386 A CN106208386 A CN 106208386A CN 201610781267 A CN201610781267 A CN 201610781267A CN 106208386 A CN106208386 A CN 106208386A
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- H02J13/0075—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/242—Home appliances
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
Abstract
A kind of intelligent switch control method being applicable to family's micro-capacitance sensor, including: detect voltage and the electric current of civil power at total outlet switch in real time, detect voltage and the electric current of each branch road of each branch road at branch switch in real time, and be sent to computing module；Voltage x current data being transferred in computing module, computing module calculates total outlet active power, reactive power and the active power of each branch road, reactive power, and is analyzed current electric grid state；By detection line voltage, computing module judges that electric network state is whether normal, control total outlet switch deciliter, be wherein grid-connect mode during total outlet switch Guan Bi, be off-network pattern during total outlet disconnection；By the analysis to each branch road active power, form under grid-connect mode each branch switch deciliter mode under each branch switch deciliter mode or off-network pattern.Being effectively isolated of family's micro-capacitance sensor when the present invention ensure that civil power normal power supply and forced outage, improves efficiency level.The most also system economical operation benefit is improved.
Description
Technical field
The present invention relates to a kind of intelligent switch control method.Particularly relate to a kind of intelligence being applicable to family's micro-capacitance sensor open
Close control method.
Background technology
Day by day improving living standard prescription along with people and generation of electricity by new energy technology becomes increasingly popular, family is micro-
Electrical network has become a significant element in modern electric.So-called micro-capacitance sensor refer to by distributed power generation, load, energy storage device and
Control the single controlled stand alone generating system that device is constituted.Family's micro-capacitance sensor is then with resident's house as object,
The electrical equipments such as the clean energy resourcies such as photovoltaic generation, wind-power electricity generation and energy storage device and Smart Home build micro-grid system.
Day by day improving living standard prescription along with people and generation of electricity by new energy technology becomes increasingly popular, family is micro-
Electrical network has become a significant element in modern electric.So-called micro-capacitance sensor refer to by distributed power generation, load, energy storage device and
Control the single controlled stand alone generating system that device is constituted.Family's micro-capacitance sensor is then with resident's house as object,
The electrical equipments such as the clean energy resourcies such as photovoltaic generation, wind-power electricity generation and energy storage device and Smart Home build micro-grid system.
Generally family micro-capacitance sensor user is relatively low to the requirement of the electric parameters such as voltage, frequency, and main electrical problem concentrates on
Power supply reliability, electricity price information and electricity charge control, power information immediate inquiring, electricity consumption situation analysis result feedback, failture evacuation,
Two-way interaction etc. with electrical network operation system platform.For the part user containing Distributed-generation equipment, its electricity consumption is told
Ask and also include the basic electric data of Distributed-generation equipment and relevant information, such as power, gross generation, rate for incorporation into the power network, equipment dimension
Protect, failture evacuation etc..
Existing family micro-grid system building process has been applied mechanically large-scale industry and commerce micro-capacitance sensor pattern, photovoltaic generation, wind
The new forms of energy equipment such as power generating uses single access module, be configured with simultaneously the micro-capacitance sensor monitoring and protection of complexity, Schema control,
EMS, although micro-grid connection operational effect is good, but the quantities of micro-grid system is relatively big, cost is higher, no
Meet family's micro-capacitance sensor practical situation.And traditional home switch is simultaneously, traditional micro-capacitance sensor construction method is on data are transmitted
There is limitation, it is impossible to meet domestic consumer and the immediate inquiring of electrical equipment state is managed requirement with control.
Summary of the invention
The technical problem to be solved is to provide man when one ensure that civil power normal power supply and forced outage
The intelligent switch control method being applicable to family's micro-capacitance sensor being effectively isolated of front yard micro-capacitance sensor.
The technical solution adopted in the present invention is: a kind of intelligent switch control method being applicable to family's micro-capacitance sensor, including
Following steps:
1) detect the voltage Us and electric current Is of civil power at total outlet switch in real time, at branch switch, detect each branch road in real time
Voltage U1, U2 ... the electric current I1, I2 of Un and each branch road ... In；
2) by step 1) in the voltage x current data that obtain be transferred in computing module, computing module calculates total outlet and gains merit
The active-power P 1, P2 of power P s, reactive power Q s and each branch road ... Pn, reactive power Q 1, Q2 ... Qn, and to current electric grid shape
State is analyzed；
3) by detection line voltage Us, computing module judges that electric network state is the most normal, controls dividing of total outlet switch
Closing, be wherein grid-connect mode during total outlet switch Guan Bi, total outlet is off-network pattern when disconnecting；By to each branch road active power
P1, P2 ... the analysis of Pn, form under grid-connect mode each branch switch deciliter side under each branch switch deciliter mode or off-network pattern
Formula；
4) after each switch motion completes, step 1 is returned).
Carrying out step 2) while, computing module, is sent the real-time status of switch by wireless network through communication module
Enter mobile terminal interdynamic, help user complete the immediate inquiring to family's micro-capacitance sensor and control management；Particular by wireless network
Data and the electricity consumption Energy Efficiency Analysis result of operation control module that each branch road is gathered by network are uploaded to mobile terminal, make user straight
The grasp household electricity state connect；User carries out labor management by mobile terminal to household electricity equipment simultaneously, according to individual
Demand turns off in time or closed pair answers the switch of branch road；
Step 2) described in current electric grid state is analyzed, including:
(1) voltage and current signal carrying out sliding-model control, voltage and current discretization formula is:
In formula, u (n) is a group for obtaining the voltage dispersion of actual measurement with sample frequency within the Fourier transformation cycle
Sequential value, can represent and detect the voltage detecting each branch road at the voltage Us of civil power or branch switch in real time at total outlet switch in real time
U1, U2 ... Un amplitude in each sampling, N is the cycle of Fourier transformation, and U (k) is that u (n) carries out Fourier transformation value,For the complex exponential sequence with n as cycle, whereinFor this sequence real part,For this sequence imaginary part.
In formula, i (n) is a group for obtaining the voltage dispersion of actual measurement with sample frequency within the Fourier transformation cycle
Sequential value, can represent and detect the voltage detecting each branch road at the voltage Is of civil power or branch switch in real time at total outlet switch in real time
I1, I2 ... In amplitude in each sampling, N is the cycle of Fourier transformation, and I (k) is that i (n) carries out Fourier transformation value,For the complex exponential sequence with n as cycle, whereinFor this sequence real part,For this sequence imaginary part.
(2) set cycle and the iteration time of discrete Fourier transform, calculate the active power under N point different frequency respectively
With reactive power, active power and reactive power calculating formula are:
In formula, P (k) is active power value, and Q (k) is reactive power value,For voltage phase angle, ψiK () is current phase angle；
(3) calculate power error, thus accurately draw family's micro-capacitance sensor each electrical equipment branch road send out, power consumption, for efficiency
Analyzing and run and control, power error computing formula is:
In formula, err is power calculation error, and in formula, following table is k=0, the meter such as voltage when 1,2,3, electric current, phase angle, power
Calculation value.
Step 3) described in computing module judge that electric network state whether the most normally, controls always to go out by detection line voltage Us
Wiretap deciliter, including:
(1) judge that line voltage is whether normal, according to China's national standard 220V scope range of the fluctuation of voltage be-7%～+
10%, therefore, as 204.6≤Us≤242V, under continuation, walk judgement, otherwise disconnect total outlet switch；
(3) judge that mains frequency is whether normal, according to China's national standard 50Hz frequency fluctuation scope be-0.5～+
0.5Hz, therefore, as 49.5≤fs≤50.5Hz, walks judgement under continuation, otherwise disconnects total outlet switch；
(4) judge that city's electrical phase angle is the most normal, be 20 ° according to China's national standard simultaneous interconnecting deviation range, therefore,
When-20 °≤θ s≤20 °, it is believed that electrical network is normal, closes grid-connected switch, otherwise disconnects total outlet switch；
(5) according to total outlet switch state, on off state 0, corresponding off-network state are formed when total outlet switch disconnects；When
Switch shape 1, corresponding and net state is formed during total outlet switch Guan Bi；
(6) maintained switch state, returns step 1).
Step 3) described in grid-connect mode under each branch switch deciliter mode include:
First define the load type that each branch switch is corresponding, will the active-power P 1 of branch road in overall control flow,
P2 ... Pn, corresponds to photovoltaic generation power Ppv, energy storage branch power Pbat, institute's charged device machine utilization；
Each branch road load is divided three classes according to type can not transfer load Pbz, transferable load Pkz, other loads Pqt；
Under grid-connect mode, each branch switch deciliter mode specifically includes:
(1) Guan Bi photovoltaic branch switch, utilize step 2) in active power calculate formula, calculate photovoltaic generation power
Ppv；
(2) Guan Bi all can not transfer load branch switch, utilize step 2) in active power calculate formula, calculate not
Transferable load Pbz；
(3) judge whether photovoltaic generation power meets current loads demand, as Ppv >=Pbz, represent that photovoltaic generation fills
Foot, the most again judges whether can close transferable load successively, enters next step；Otherwise Guan Bi energy storage branch road, by electricity
Tank discharge, meets power difference；
(4) close successively transferable load branch circuit switch, utilize step 2) in active power calculate formula, calculating can turn
Move load Pkz；
(5) judge whether photovoltaic generation power meets current loads demand, as Ppv >=Pbz+Pkz, represent photovoltaic generation
Abundance, the most again judges whether can close other loads successively, enters next step；Otherwise Guan Bi energy storage branch road, by electricity
Tank discharge, meets power difference；
(6) whether also have other load branch circuits in judging family, close other load branch circuits switch, meter the most successively
Calculate transferable load Pqt, otherwise other loads Pqt=0；
(7) judge whether photovoltaic generation power meets current loads demand, as Ppv >=Pbz+Pkz+Pqt, represent photovoltaic
Generating abundance, is closed energy storage branch road, is charged by battery, meet power difference, enter next step；Otherwise Guan Bi energy storage branch road,
By battery discharge, meet power difference；
(8) judge whether the general power of photovoltaic and energy storage meets workload demand, as Ppv+Pbat >=Pbz+Pkz+Pqt,
Represent family's microgrid light storage generating abundance, calculate total electricity sales amount now by total outlet switch to electrical network sale of electricity, computing module；When
During Ppv+Pbat ＜ Pbz+Pkz+Pqt, represent family's microgrid light storage generation deficiency, purchase to electrical network now by total outlet switch
Electricity, computing module calculates total purchase of electricity；
(9) maintained switch state, returns step 1).
Step 3) described in off-network pattern under each branch switch deciliter mode include:
First define the load type that each branch switch is corresponding, will the active-power P 1 of branch road in overall control flow,
P2 ... Pn, corresponds to photovoltaic generation power Ppv, energy storage branch power Pbat, institute's charged device machine utilization；
Each branch road load is divided three classes according to type can not transfer load Pbz, transferable load Pkz, other loads Pqt；
Wherein for transfer load Pbz must assure that uninterrupted power supply, transferable load Pkz and other loads Pqt can be according to realities
Border situation chooses whether to put into；
Under off-network pattern, each branch switch deciliter mode specifically includes:
(1) judge energy storage charge state, when energy storage charge state >=30%, illustrate that energy-storage battery just can ensure under off-network
Often power supply, now Guan Bi energy storage branch switch；
(2) Guan Bi can not transfer load branch switch, energy storage system discharges；
(3) judge whether microgrid has transferable load or other loads, if having, closed load branch road successively, and check
Battery electric quantity whether sufficient next step, otherwise return step 1)；
When energy storage SOC < when 30%, disconnect transferable load and other load branch circuits and switch, guarantee can not transfer load not
Interruptedly supplying power, returns step 1)；
(4) (1st), if detecting in step, energy storage SOC < when 30%, detects photovoltaic generation power Ppv.
When photovoltaic generation power is not more than energy storage charge power, i.e. during Ppv≤Pbat_max, close photovoltaic branch switch
Charging for energy storage, i.e. Ppv is when battery SOC > 80% time, illustrate that battery has reached the upper limit, now disconnects photovoltaic branch switch, return and walk
Rapid 1)；
When photovoltaic generation power is more than energy storage charge power, i.e. during Ppv > Pbat_max, Guan Bi photovoltaic branch switch is
Energy storage is charged, and detection load branch power simultaneously when photovoltaic still has power residue i.e. Ppv-Pbz-Pkz > Pbat_max, then closes
Disconnected photovoltaic branch road stops charging, and otherwise maintained switch state is constant, returns step 1).
A kind of intelligent switch control method being applicable to family's micro-capacitance sensor of the present invention, it is possible to ensure civil power normal power supply and
Being effectively isolated of family's micro-capacitance sensor during forced outage, by internal control strategy realize grid-connected and time off-network is run each electric appliances set
Standby electric energy optimum utilization, improves efficiency level.Meanwhile, by intelligent switch communication unit, user can be met to household electricity
The immediate inquiring of equipment and online management, improve system economical operation benefit.
Accompanying drawing explanation
Fig. 1 is typical family micro-grid system structure；
Fig. 2 is that the switch that the present invention is applicable to the intelligent switching control side of family's micro-capacitance sensor corresponding constitutes schematic diagram substantially；
Fig. 3 is intelligent switching control side's overall control flow figure that the present invention is applicable to family's micro-capacitance sensor；
Fig. 4 is the flow chart in the present invention being analyzed current electric grid state；
Fig. 5 is that in the present invention, computing module judges the most normal flow chart of electric network state by detection line voltage Us；
Fig. 6 is the flow chart of each branch switch deciliter mode under grid-connect mode in the present invention；
Fig. 7 is the flow chart of each branch switch deciliter mode under off-network pattern in the present invention；
Fig. 8 is communication schematic diagram of the present invention in the present invention.
Detailed description of the invention
A kind of intelligent switch control method being applicable to family's micro-capacitance sensor to the present invention below in conjunction with embodiment and accompanying drawing
It is described in detail.
A kind of intelligent switch control method being applicable to family's micro-capacitance sensor of the present invention, it is adaptable to use the intelligence that 220V accesses
Can family micro-capacitance sensor, propose a kind of intelligent switch control method being adapted to family's micro-capacitance sensor, specifically include power detection, grid-connected
The implementation method of the functions such as operation, off-network operation, deciliter control.
When the control method of the intelligent switch involved by the inventive method ensure that civil power normal power supply and forced outage
Being effectively isolated of family's micro-capacitance sensor, realizes when grid-connected and off-network is run the electric energy of all kinds of electric equipments by internal control strategy
Good utilization, improves efficiency level.Meanwhile, by intelligent switch communication unit, instant to household electricity equipment of user can be met
Inquiry and online management, improve system economical operation benefit.
Fig. 1 is typical family micro-grid system structure, comprises distributed photovoltaic power generation equipment, little Rong in family's micro-capacitance sensor
Measuring the electrical equipments such as energy storage device, and TV, refrigerator, air-conditioning, illumination, each equipment is all linked in microgrid bus, then warp
Cross points of common connection (PCC) to be electrically connected with city.Time properly functioning, family's micro-capacitance sensor is powered by the single-phase 220V of civil power and is maintained electrical equipment to set
Received shipment row, photovoltaic is mode operation of generating power for their own use, and energy-storage system is as stand-by power supply.During municipal power failure, the PCC of family's micro-capacitance sensor
Node disconnects, and energy storage device maintains electric voltage frequency, photovoltaic and balancing the load maintain visual plant uninterrupted power supply.Wherein,
It is applicable to the switching range of the intelligent switch control method application of family's micro-capacitance sensor for the present invention in red frame.
Fig. 2 present invention a kind of is applicable to switch corresponding to the intelligent switch control method of family's micro-capacitance sensor and substantially constitutes and show
Being intended to, the most corresponding total outlet switch is the connecting valve point with single-phase 220V civil power, and the most corresponding each branch switch is system
Outlet, can be accessed by generation of electricity by new energy equipment, energy storage device, and the household electricity equipment such as photovoltaic.Household electricity equipment can root
It is linked in different switches according to load character, forms lighting loop, television set loop, air conditioner loop, refrigerator loop etc. individually
Power supply duplexure.Each duplexure can individually measure the electric current in this loop, power and information about power.At total outlet switch
And the 2. correspondence system computing between branch switch and communication module, can realize being analyzed collecting each loop data, shape
Becoming optimal system operation mode, and be uploaded to mobile terminal by communication module, the control that simultaneously can receive mobile terminal refers to
Order.Additionally, in being integrated in 2. 4. for also, off-network display lamp, the running status that family's micro-capacitance sensor is current can be shown.
As it is shown on figure 3, a kind of intelligent switch control method being applicable to family's micro-capacitance sensor of the present invention, including walking as follows
Rapid:
1) detect the voltage Us and electric current Is of civil power at total outlet switch in real time, at branch switch, detect each branch road in real time
Voltage U1, U2 ... the electric current I1, I2 of Un and each branch road ... In；
2) by step 1) in the voltage x current data that obtain be transferred in computing module, computing module calculates total outlet and gains merit
The active-power P 1, P2 of power P s, reactive power Q s and each branch road ... Pn, reactive power Q 1, Q2 ... Qn, and to current electric grid shape
State is analyzed；
As shown in Figure 4, described is analyzed current electric grid state, including:
(1) voltage and current signal carrying out sliding-model control, voltage and current discretization formula is:
In formula, u (n) is a group for obtaining the voltage dispersion of actual measurement with sample frequency within the Fourier transformation cycle
Sequential value, can represent and detect the voltage detecting each branch road at the voltage Us of civil power or branch switch in real time at total outlet switch in real time
U1, U2 ... Un amplitude in each sampling, N is the cycle of Fourier transformation, and U (k) is that u (n) carries out Fourier transformation value,For the complex exponential sequence with n as cycle, whereinFor this sequence real part,For this sequence imaginary part；
In formula, i (n) is a group for obtaining the voltage dispersion of actual measurement with sample frequency within the Fourier transformation cycle
Sequential value, can represent and detect the voltage detecting each branch road at the voltage Is of civil power or branch switch in real time at total outlet switch in real time
I1, I2 ... In amplitude in each sampling, N is the cycle of Fourier transformation, and I (k) is that i (n) carries out Fourier transformation value,
For the complex exponential sequence with n as cycle, whereinFor this sequence real part,For this sequence imaginary part；
(2) set cycle and the iteration time of discrete Fourier transform, calculate the active power under N point different frequency respectively
With reactive power, active power and reactive power calculating formula are:
In formula, P (k) is active power value, and Q (k) is reactive power value,For voltage phase angle, ψiK () is current phase angle；
(3) calculate power error, thus accurately draw family's micro-capacitance sensor each electrical equipment branch road send out, power consumption, for efficiency
Analyzing and run and control, power error computing formula is:
In formula, err is power calculation error, and in formula, following table is k=0, the meter such as voltage when 1,2,3, electric current, phase angle, power
Calculation value.
Carrying out step 2) while, computing module, is sent the real-time status of switch by wireless network through communication module
Enter mobile terminal interdynamic, help user complete the immediate inquiring to family's micro-capacitance sensor and control management；As shown in Figure 8, it is to pass through
Data and the electricity consumption Energy Efficiency Analysis result of operation control module that each branch road is gathered by wireless network are uploaded to mobile terminal, make
User directly grasps household electricity state；User carries out labor management, root by mobile terminal to household electricity equipment simultaneously
Turn off in time according to demands of individuals or closed pair answers the switch of branch road；Its concrete communication mode is:
Computing module is while grid-connect mode, off-network Schema control, by the operation shape of wireless network family micro-capacitance sensor
The electricity consumption situation analysis of state and each branch road is uploaded to mobile terminal；User judges according to self, issues user instruction, micro-to family
Net remotely controls.
3) by detection line voltage Us, computing module judges that electric network state is the most normal, controls dividing of total outlet switch
Closing, be wherein grid-connect mode during total outlet switch Guan Bi, total outlet is off-network pattern when disconnecting；By to each branch road active power
P1, P2 ... the analysis of Pn, form under grid-connect mode each branch switch deciliter side under each branch switch deciliter mode or off-network pattern
Formula；
As it is shown in figure 5, by detection line voltage Us, described computing module judges that electric network state is the most normal, control
Total outlet switch deciliter, including:
(1) judge that line voltage is whether normal, according to China's national standard 220V scope range of the fluctuation of voltage be-7%～+
10%, therefore, as 204.6≤Us≤242V, under continuation, walk judgement, otherwise disconnect total outlet switch；
(3) judge that mains frequency is whether normal, according to China's national standard 50Hz frequency fluctuation scope be-0.5～+
0.5Hz, therefore, as 49.5≤fs≤50.5Hz, walks judgement under continuation, otherwise disconnects total outlet switch；
(4) judge that city's electrical phase angle is the most normal, be 20 ° according to China's national standard simultaneous interconnecting deviation range, therefore,
When-20 °≤θ s≤20 °, it is believed that electrical network is normal, closes grid-connected switch, otherwise disconnects total outlet switch；
(5) according to total outlet switch state, on off state 0, corresponding off-network state are formed when total outlet switch disconnects；When
Switch shape 1, corresponding and net state is formed during total outlet switch Guan Bi；
(6) maintained switch state, returns step 1).
As shown in Figure 6, under described grid-connect mode, each branch switch deciliter mode includes:
First define the load type that each branch switch is corresponding, will the active-power P 1 of branch road in overall control flow,
P2 ... Pn, corresponds to photovoltaic generation power Ppv, energy storage branch power Pbat, institute's charged device machine utilization；Such as lighting load
Plight, refrigerator load Pfridge, air conditioner load Pair and water heater load Pheater etc..
Each branch road load is divided three classes according to type can not transfer load Pbz, transferable load Pkz, other loads Pqt；
Wherein: transfer load Pbz can not include lighting load Plight, refrigerator load Pfridge etc.:
Pbz=Plight+Pfridge
Transferable load Pkz includes air conditioner load Pair, water heater load Pheater etc.:
Pkz=Pair+Pheater
Other loads individually calculate:
Other branch roads of Pqt=Σ
Under grid-connect mode, each branch switch deciliter mode specifically includes:
(1) Guan Bi photovoltaic branch switch, utilize step 2) in active power calculate formula, calculate photovoltaic generation power
Ppv；
(2) Guan Bi all can not transfer load branch switch, such as electric light, refrigerator etc., utilize step 2) in active power
Computing formula, calculating can not transfer load Pbz；
(3) judge whether photovoltaic generation power meets current loads demand, as Ppv >=Pbz, represent that photovoltaic generation fills
Foot, the most again judges whether can close transferable load successively, enters next step；Otherwise Guan Bi energy storage branch road, by electricity
Tank discharge, meets power difference；
(4) close successively transferable load branch circuit switch, such as air-conditioning, water heater etc., utilize step 2) in active power
Computing formula, calculates transferable load Pkz；
(5) judge whether photovoltaic generation power meets current loads demand, as Ppv >=Pbz+Pkz, represent photovoltaic generation
Abundance, the most again judges whether can close other loads successively, enters next step；Otherwise Guan Bi energy storage branch road, by electricity
Tank discharge, meets power difference；
(6) whether also have other load branch circuits in judging family, close other load branch circuits switch, meter the most successively
Calculate transferable load Pqt, otherwise other loads Pqt=0；
(7) judge whether photovoltaic generation power meets current loads demand, as Ppv >=Pbz+Pkz+Pqt, represent photovoltaic
Generating abundance, is closed energy storage branch road, is charged by battery, meet power difference, enter next step；Otherwise Guan Bi energy storage branch road,
By battery discharge, meet power difference；
(8) judge whether the general power of photovoltaic and energy storage meets workload demand, as Ppv+Pbat >=Pbz+Pkz+Pqt,
Represent family's microgrid light storage generating abundance, calculate total electricity sales amount now by total outlet switch to electrical network sale of electricity, computing module；When
During Ppv+Pbat ＜ Pbz+Pkz+Pqt, represent family's microgrid light storage generation deficiency, purchase to electrical network now by total outlet switch
Electricity, computing module calculates total purchase of electricity；
(9) maintained switch state, returns step 1).
As it is shown in fig. 7, each branch switch deciliter mode includes under described off-network pattern:
First define the load type that each branch switch is corresponding, will the active-power P 1 of branch road in overall control flow,
P2 ... Pn, corresponds to photovoltaic generation power Ppv, energy storage branch power Pbat, institute's charged device machine utilization；Such as lighting load
Plight, refrigerator load Pfridge, air conditioner load Pair and water heater load Pheater etc..
Each branch road load is divided three classes according to type can not transfer load Pbz, transferable load Pkz, other loads Pqt；
Wherein: transfer load Pbz can not include lighting load Plight, refrigerator load Pfridge etc.:
Pbz=Plight+Pfridge
Transferable load Pkz includes air conditioner load Pair, water heater load Pheater etc.:
Pkz=Pair+Pheater
Other loads individually calculate:
Other branch roads of Pqt=Σ, wherein for transfer load Pbz must assure that uninterrupted power supply, transferable load
Pkz and other loads Pqt can choose whether to put into according to practical situation；
Under off-network pattern, each branch switch deciliter mode specifically includes:
(1) judge energy storage charge state (SOC), when energy storage charge state >=30%, illustrate energy-storage battery can ensure from
Normal power supply off the net, now Guan Bi energy storage branch switch；
(2) Guan Bi can not transfer load branch switch, energy storage system discharges；
(3) judge whether microgrid has transferable load or other loads, if having, closed load branch road successively, and check
Battery electric quantity whether sufficient next step, otherwise return step 1)；
When energy storage SOC < when 30%, disconnect transferable load and other load branch circuits and switch, guarantee can not transfer load not
Interruptedly supplying power, returns step 1)；
(4) (1st), if detecting in step, energy storage SOC < when 30%, detects photovoltaic generation power Ppv.
When photovoltaic generation power is not more than energy storage charge power, i.e. during Ppv≤Pbat_max, close photovoltaic branch switch
Charging for energy storage, i.e. Ppv is when battery SOC > 80% time, illustrate that battery has reached the upper limit, now disconnects photovoltaic branch switch, return and walk
Rapid 1)；
When photovoltaic generation power is more than energy storage charge power, i.e. during Ppv > Pbat_max, Guan Bi photovoltaic branch switch is
Energy storage is charged, and detection load branch power simultaneously when photovoltaic still has power residue i.e. Ppv-Pbz-Pkz > Pbat_max, then closes
Disconnected photovoltaic branch road stops charging, and otherwise maintained switch state is constant, returns step 1).
4) after each switch motion completes, step 1 is returned).
Claims (6)
1. the intelligent switch control method being applicable to family's micro-capacitance sensor, it is characterised in that comprise the steps:
1) detect the voltage Us and electric current Is of civil power at total outlet switch in real time, at branch switch, detect the voltage of each branch road in real time
U1, U2 ... the electric current I1, I2 of Un and each branch road ... In；
2) by step 1) in the voltage x current data that obtain be transferred in computing module, computing module calculates total outlet active power
The active-power P 1, P2 of Ps, reactive power Q s and each branch road ... Pn, reactive power Q 1, Q2 ... Qn, and current electric grid state is entered
Row is analyzed；
3) whether the most normally computing module judges electric network state by detection line voltage Us, control total outlet switch deciliter,
Being wherein grid-connect mode during total outlet switch Guan Bi, total outlet is off-network pattern when disconnecting；By to each branch road active-power P 1,
P2 ... the analysis of Pn, forms under grid-connect mode each branch switch deciliter mode under each branch switch deciliter mode or off-network pattern；
4) after each switch motion completes, step 1 is returned).
A kind of intelligent switch control method being applicable to family's micro-capacitance sensor the most according to claim 1, it is characterised in that
Carry out step 2) while, computing module by the real-time status of switch, sends into mobile terminal by wireless network through communication module
Interaction, helps user complete the immediate inquiring to family's micro-capacitance sensor and control management；Particular by wireless network by each branch road
The data gathered and the electricity consumption Energy Efficiency Analysis result of operation control module are uploaded to mobile terminal, make user directly grasp house
Front yard electricity condition；User carries out labor management by mobile terminal to household electricity equipment simultaneously, closes in time according to demands of individuals
Disconnected or closed pair answers the switch of branch road；
A kind of intelligent switch control method being applicable to family's micro-capacitance sensor the most according to claim 1, it is characterised in that step
Rapid 2) current electric grid state is analyzed described in, including:
(1) voltage and current signal carrying out sliding-model control, voltage and current discretization formula is:
In formula, u (n) is one group of sequence for obtaining the voltage dispersion of actual measurement with sample frequency within the Fourier transformation cycle
Value, can represent and detect the voltage U1 detecting each branch road at the voltage Us of civil power or branch switch in real time at total outlet switch in real time,
U2 ... Un amplitude in each sampling, N are the cycle of Fourier transformation, and U (k) is that u (n) carries out Fourier transformation value,For
Complex exponential sequence with n as cycle, whereinFor this sequence real part,For this sequence imaginary part.
In formula, i (n) is one group of sequence for obtaining the voltage dispersion of actual measurement with sample frequency within the Fourier transformation cycle
Value, can represent and detect the voltage I1 detecting each branch road at the voltage Is of civil power or branch switch in real time at total outlet switch in real time,
I2 ... In amplitude in each sampling, N are the cycle of Fourier transformation, and I (k) is that i (n) carries out Fourier transformation value,For
Complex exponential sequence with n as cycle, whereinFor this sequence real part,For this sequence imaginary part.
(2) set cycle and the iteration time of discrete Fourier transform, calculate the active power under N point different frequency and nothing respectively
Merit power, active power and reactive power calculate formula:
In formula, P (k) is active power value, and Q (k) is reactive power value,For voltage phase angle, ψiK () is current phase angle；
(3) calculate power error, thus accurately draw family's micro-capacitance sensor each electrical equipment branch road send out, power consumption, for Energy Efficiency Analysis
And run control, power error computing formula is:
In formula, err is power calculation error, and in formula, following table is k=0, and voltage when 1,2,3, electric current, phase angle, power etc. calculate
Value.
A kind of intelligent switch control method being applicable to family's micro-capacitance sensor the most according to claim 1, it is characterised in that step
Rapid 3) by detection line voltage Us, the computing module described in judges that electric network state is the most normal, control dividing of total outlet switch
Close, including:
(1) judge that line voltage is the most normal, be-7%～+10% according to China's national standard 220V scope range of the fluctuation of voltage, because of
This, as 204.6≤Us≤242V, walk judgement under continuation, otherwise disconnect total outlet switch；
(3) judge that mains frequency is the most normal, be-0.5～+0.5Hz according to China's national standard 50Hz frequency fluctuation scope, because of
This, as 49.5≤fs≤50.5Hz, walk judgement under continuation, otherwise disconnect total outlet switch；
(4) judge that city's electrical phase angle is the most normal, be 20 ° according to China's national standard simultaneous interconnecting deviation range, therefore, when-20 °
During≤θ s≤20 °, it is believed that electrical network is normal, closes grid-connected switch, otherwise disconnects total outlet switch；
(5) according to total outlet switch state, on off state 0, corresponding off-network state are formed when total outlet switch disconnects；Go out when always
Switch shape 1, corresponding and net state is formed during wiretap Guan Bi；
(6) maintained switch state, returns step 1).
A kind of intelligent switch control method being applicable to family's micro-capacitance sensor the most according to claim 1, it is characterised in that step
Rapid 3) under the grid-connect mode described in, each branch switch deciliter mode includes:
First the load type that each branch switch is corresponding is defined, will the active-power P 1, P2 of branch road in overall control flow ...
Pn, corresponds to photovoltaic generation power Ppv, energy storage branch power Pbat, institute's charged device machine utilization；
Each branch road load is divided three classes according to type can not transfer load Pbz, transferable load Pkz, other loads Pqt；
Under grid-connect mode, each branch switch deciliter mode specifically includes:
(1) Guan Bi photovoltaic branch switch, utilize step 2) in active power calculate formula, calculate photovoltaic generation power Ppv；
(2) Guan Bi all can not transfer load branch switch, utilize step 2) in active power calculate formula, calculating can not turn
Move load Pbz；
(3) judge whether photovoltaic generation power meets current loads demand, as Ppv >=Pbz, represent that photovoltaic generation is sufficient, this
Shi Zaici judges whether can close transferable load successively, enters next step；Otherwise Guan Bi energy storage branch road, is put by battery
Electricity, meets power difference；
(4) close transferable load branch circuit switch successively, utilize step 2) in active power calculate formula, calculate transferable negative
Lotus Pkz；
(5) judge whether photovoltaic generation power meets current loads demand, as Ppv >=Pbz+Pkz, represent that photovoltaic generation fills
Foot, the most again judges whether can close other loads successively, enters next step；Otherwise Guan Bi energy storage branch road, passes through battery
Electric discharge, meets power difference；
(6) whether also having other load branch circuits in judging family, close other load branch circuits switch the most successively, calculating can
Transfer load Pqt, otherwise other loads Pqt=0；
(7) judge whether photovoltaic generation power meets current loads demand, as Ppv >=Pbz+Pkz+Pqt, represent photovoltaic generation
Abundance, is closed energy storage branch road, is charged by battery, meet power difference, enter next step；Otherwise Guan Bi energy storage branch road, passes through
Battery discharge, meets power difference；
(8) judge whether the general power of photovoltaic and energy storage meets workload demand, as Ppv+Pbat >=Pbz+Pkz+Pqt, represent
Family's microgrid light storage generating abundance, calculates total electricity sales amount now by total outlet switch to electrical network sale of electricity, computing module；Work as Ppv+
During Pbat ＜ Pbz+Pkz+Pqt, represent family's microgrid light storage generation deficiency, now by total outlet switch to electrical network power purchase, fortune
Calculate module and calculate total purchase of electricity；
(9) maintained switch state, returns step 1).
A kind of intelligent switch control method being applicable to family's micro-capacitance sensor the most according to claim 1, it is characterised in that step
Rapid 3) under the off-network pattern described in, each branch switch deciliter mode includes:
First the load type that each branch switch is corresponding is defined, will the active-power P 1, P2 of branch road in overall control flow ...
Pn, corresponds to photovoltaic generation power Ppv, energy storage branch power Pbat, institute's charged device machine utilization；
Each branch road load is divided three classes according to type can not transfer load Pbz, transferable load Pkz, other loads Pqt；Wherein
For transfer load Pbz must assure that uninterrupted power supply, transferable load Pkz and other loads Pqt can be according to actual feelings
Condition chooses whether to put into；
Under off-network pattern, each branch switch deciliter mode specifically includes:
(1) judge energy storage charge state, when energy storage charge state >=30%, illustrate that energy-storage battery can ensure normally to supply under off-network
Electricity, now Guan Bi energy storage branch switch；
(2) Guan Bi can not transfer load branch switch, energy storage system discharges；
(3) judge whether microgrid has transferable load or other loads, if having, closed load branch road successively, and check battery
Electricity whether sufficient next step, otherwise return step 1)；
When energy storage SOC < when 30%, disconnect transferable load and other load branch circuits and switch, guarantee can not transfer load uninterrupted
Power supply, returns step 1)；
(4) (1st), if detecting in step, energy storage SOC < when 30%, detects photovoltaic generation power Ppv.
When photovoltaic generation power is not more than energy storage charge power, i.e. during Ppv≤Pbat_max, Guan Bi photovoltaic branch switch is storage
Can charging, i.e. Ppv is when battery SOC > 80% time, illustrate that battery has reached the upper limit, now disconnects photovoltaic branch switch, return step
1)；
When photovoltaic generation power is more than energy storage charge power, i.e. during Ppv > Pbat_max, Guan Bi photovoltaic branch switch is energy storage
Charging, detection load branch power simultaneously, when photovoltaic still has power residue i.e. Ppv-Pbz-Pkz > Pbat_max, then turn off light
Volt branch road stops charging, and otherwise maintained switch state is constant, returns step 1).
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| CN113078733A (en) * | 2021-05-14 | 2021-07-06 | 四川航电微能源有限公司 | Aircraft static power supply integrating energy management |
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