CN105119287B - A kind of distributed digital Power quality management device and power supply system - Google Patents
A kind of distributed digital Power quality management device and power supply system Download PDFInfo
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- CN105119287B CN105119287B CN201510587975.3A CN201510587975A CN105119287B CN 105119287 B CN105119287 B CN 105119287B CN 201510587975 A CN201510587975 A CN 201510587975A CN 105119287 B CN105119287 B CN 105119287B
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- synchronous rectification
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- inverter
- power supply
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Abstract
The present invention discloses a kind of distributed digital Power quality management device, including DC support module, inverter module, synchronous rectification module and Energy Management System module, it is characterized in that, the input terminal of the wherein described DC support module is connect with DC power supply, the Energy Management System module is connect by conditioning module of transmitting electricity with the DC support module, and the synchronous rectification module, inverter module can even management system module be docked with described respectively.The present invention solves many existing power quality problems in rural power grids distribution system：Harmonic wave, idle, asymmetric and Voltage Drop etc. provide the power supply of standard power-frequency voltage to the user；Flexibility is strong, can not only ensure the normal power supply of user, but also can realize new energy power generation grid-connection according to the working condition of power grid demand determination device.
Description
Technical field
The present invention relates to distributed power supply technical field, specifically a kind of distributed digital Power quality management dress
It sets and the power supply system with the distributed digital Power quality management device.
Background technology
With the continuous expansion that new countryside construction works, life of farmers quality is continuously improved, and rural electricity consumption demand is also increasingly
Increase.Traditional general building time of rural power grids distribution is remote, and circuit is long, and line footpath is thin, and line impedance is big, and power quality problem is serious,
The needs of rural development development cannot usually be met；Huge warp will be caused if carrying out large area replacement to distribution line
Ji input and the wasting of resources, do not meet Sciences Economics demand for development.
Distributed power supply is adapted to the demand of regional power supply, and can reduce the dependence to unified distribution system.
But the energy source of distributed power supply is varied, such as the power generation of wind energy, solar energy, underground heat, biogas, straw burning, kind
Class is various, and the quality of energy source is also different, when carrying out distributed power supply, the electric energy by a variety of different grades is needed
Source is uniformly connected to the grid, and is still at present one and is needed the technical barrier solved.
Conventional rural power grids track remodelling installs Passively compensated device additional and carries out reactive power compensation mostly, promoted line power because
Number, while installing regulator additional and latter end voltage in circuit is lifted, ensure that the normal voltage at electricity consumption end is horizontal；But it is modern
A large amount of serious using the harmonic wave caused on circuit and asymmetric current problems, the routine adaptations mode of power electronics household appliance
It can not effectively solve the above problems.
Invention content
The object of the present invention is to provide a kind of distributed digital Power quality management devices, solve in rural power grid distribution line
Power quality problem, ensure user's normal power supply, while solving the harmonic wave on distribution line, the idle and electric energy such as asymmetric
Quality problems provide high-quality power supply to the user.
The purpose of the present invention implements by the following technical programs：
A kind of distributed digital Power quality management device, including DC support module, inverter module, synchronous rectification mould
Block and Energy Management System module, wherein the input terminal of the DC support module is connect with DC power supply, the energy management
System module is connect by conditioning module of transmitting electricity with the DC support module, the synchronous rectification module, inverter module difference
It is docked with the Energy Management System module.
Preferably, wind-light storage energy conversion can be carried out energy by transmission of electricity conditioning module at direct current energy and by DC capacitor
Amount is transmitted；
Preferably, transmission of electricity conditioning module requires to export corresponding active power according to Energy Management System, and has overvoltage
The functions such as overcurrent protection and fault alarm.
Preferably, the output end with the inverter module of the DC support module and the synchronous rectification module are connect,
The output end of the synchronous rectification module is connect with low-voltage circuit breaker, and the output end of low-voltage circuit breaker is connected to common network power transmission line
The output end on road, low-voltage circuit breaker is connected to by normally closed switch with the supply line of user is concentrated, and the inverter module passes through normal
Switch is connected to the supply line of user is concentrated.
Preferably, the DC power supply is arbitrary in wind power generation, solar power generation, geother-mal power generation, marsh gas power generation
It is one or more.
Preferably, the DC support module is DC capacitor.
Preferably, the inverter module is high-frequency PWM inverter, can DC support voltage be directly converted into power frequency mark
Quasi sine voltage output, output end voltage can with network voltage seamless connection, ensure power load it is free of discontinuities, wanted without impact
It asks.
Preferably, the inverter module uses three-level three-phase full bridge structure, output to use LCL connections；Output end voltage
Ripple is small, and aberration rate is low, fully meets the highly reliable power demands of load.
Preferably, the synchronous rectification module is high-frequency PWM rectifier, and the synchronous rectification module uses three-level three-phase
Full bridge structure, DC capacitor connect zero curve using neutral point Split type, and the structural loss is small, low noise, compared to two traditional electricity
Flat full bridge structure has apparent advantage.
Preferably, the synchronous rectification module uses DC voltage outer shroud and current on line side inner ring two close cycles tracing control,
Modulation system uses SPWM modulation systems.
Preferably, the synchronous rectification module is using fuzzy PI hybrid control and Repetitive controller mixed-control mode, system dynamic
Fast response time, steady-state tracking precision is high, strong robustness；
Preferably, the synchronous rectification module is adaptable to network voltage, may operate in three-phase power grid voltage it is relatively low,
Under the mal-conditions such as distortion and asymmetry.
Preferably, the Energy Management System module carries out a whole set of distributed digital electric energy quality optimizing apparatus system
Comprehensive control management；
Preferably, the Energy Management System module determines distributed digital electric energy quality optimizing dress according to power grid demand
The working condition of system is set, and system capacity is exported for current working status and is control effectively with conversion；
Preferably, the Energy Management System module to above-mentioned synchronous rectification module, inverter module, transmission of electricity conditioning module into
Row is uniformly coordinated control, ensures the normal operation of modules.
A kind of distribution type electric energy power supply system, including at least two distributed digital Power quality management devices and
Common network transmission line of electricity, each distributed digital Power quality management device are all connected on common network transmission line of electricity.
It is further preferred that each distributed digital Power quality management device at least supplies one group of concentration user
Electricity.
The present invention has the following advantages：
By effective application of the device, solve many existing power quality problems in rural power grids distribution system：Harmonic wave,
Idle, asymmetric and Voltage Drop etc. provides the power supply of standard power-frequency voltage to the user；
Flexibility is strong, can not only ensure the normal power supply of user, but also energy according to the working condition of power grid demand determination device
Enough realize new energy power generation grid-connection；
Stability is high, can carry out unified tracking to the normal work of modules in device to device configuration management system
Control reduces failure rate；
Safety is good, and modules all have the fault alarm functions such as overvoltage, overcurrent, excess temperature, plant failure in device
When auto by pass and can directly be powered to user by power grid.
Description of the drawings
Below according to drawings and examples, invention is further described in detail.
Fig. 1 is the structural schematic diagram of apparatus of the present invention.
Fig. 2 is the internal structure schematic diagram of synchronous rectification module.
Fig. 3 is the internal structure schematic diagram of inverter module.
Fig. 4 is the function structure chart of the present invention.
Specific implementation mode
As shown in Figs 1-4, a kind of distributed digital Power quality management device 10 described in the embodiment of the present invention, including it is straight
Supporting module 1, inverter module 2, synchronous rectification module 3, Energy Management System module 5 are flowed, wherein the DC support module 1
Input terminal is connect with DC power supply, and the Energy Management System module 5 passes through conditioning module 6 and the DC support module of transmitting electricity
1 connection, 3 pieces of the synchronous rectification mould, inverter module 2 are docked with the Energy Management System module 5 respectively.
Preferably, wind-light storage energy conversion at direct current energy and can be passed through DC capacitor by the transmission of electricity conditioning module 6
Carry out energy transmission；
Preferably, the transmission of electricity conditioning module 6 requires to export corresponding active power according to Energy Management System, and has
The functions such as over-voltage over-current protection and fault alarm.
Preferably, the input terminal of the DC support module 1 is connect with DC power supply 4, the DC support module 1 it is defeated
Outlet is connect with the inverter module 2 and the synchronous rectification module 3, and the output end and low pressure of the synchronous rectification module 3 are disconnected
Road device 11 connects, and the output end of low-voltage circuit breaker 11 is connected to common network transmission line of electricity, and the output end of low-voltage circuit breaker 11 passes through normal
Make and break is closed 12 and is connected to the supply line of user 21 is concentrated, and the inverter module 2 is by normal open switch 13 with concentration user's 21
Supply line is connected to.
Preferably, the DC power supply 4 is arbitrary in wind power generation, solar power generation, geother-mal power generation, marsh gas power generation
It is a kind of.
Preferably, the DC support module 1 is DC capacitor.
It preferably, can be directly by DC support voltage as shown in figure 3, the inverter module 2 is high-frequency PWM inverter
It is converted into power frequency standard sine voltage output, output end voltage can ensure the nothing of power load with network voltage seamless connection
Interruption is required without impact.
Preferably, the inverter module uses three-level three-phase full bridge structure, output to use LCL connections；Output end voltage
Ripple is small, and aberration rate is low, fully meets the highly reliable power demands of load.
Preferably, as shown in Fig. 2, the synchronous rectification module 3 is using using three-level three-phase full bridge structure, DC capacitor
Zero curve is connected using neutral point Split type, the structural loss is small, low noise, has compared to two traditional Level Full Bridge structures apparent
Advantage.
Preferably, the synchronous rectification module uses DC voltage outer shroud and current on line side inner ring two close cycles tracing control,
Modulation system uses SPWM modulation systems.
Preferably, the synchronous rectification module is using fuzzy PI hybrid control and Repetitive controller mixed-control mode, system dynamic
Fast response time, steady-state tracking precision is high, strong robustness；
Preferably, the synchronous rectification module is adaptable to network voltage, may operate in three-phase power grid voltage it is relatively low,
Under the mal-conditions such as distortion and asymmetry.
Preferably, the Energy Management System module carries out a whole set of distributed digital electric energy quality optimizing apparatus system
Comprehensive control management；
Preferably, the Energy Management System module determines distributed digital electric energy quality optimizing dress according to power grid demand
The working condition of system is set, and system capacity is exported for current working status and is control effectively with conversion；
Preferably, the Energy Management System module to above-mentioned synchronous rectification module, inverter module, transmission of electricity conditioning module into
Row is uniformly coordinated control, ensures the normal operation of modules.
As shown in Figure 1, a kind of distribution type electric energy power supply system, including at least two distributed digital power qualities
Managing device 10 and common network transmission line of electricity, it is defeated that each distributed digital Power quality management device 10 is all connected to common network
In electric line.
It is further preferred that each distributed digital Power quality management device at least supplies one group of concentration user
Electricity.
The present invention has the following advantages：
By effective application of the device, solve many existing power quality problems in rural power grids distribution system：Harmonic wave,
Idle, asymmetric and Voltage Drop etc. provides the power supply of standard power-frequency voltage to the user；
Flexibility is strong, can not only ensure the normal power supply of user, but also energy according to the working condition of power grid demand determination device
Enough realize new energy power generation grid-connection；
Stability is high, can carry out unified tracking to the normal work of modules in device to device configuration management system
Control reduces failure rate；
Safety is good, and modules all have the fault alarm functions such as overvoltage, overcurrent, excess temperature, plant failure in device
When auto by pass and can directly be powered to user by power grid.
Claims (1)
1. a kind of distributed digital Power quality management device and power supply system, including it is DC support module, inverter module, same
Walk rectification module and Energy Management System module, which is characterized in that the input terminal and direct current of the wherein described DC support module
Source connect, the Energy Management System module by transmit electricity conditioning module connect with the DC support module, it is described synchronize it is whole
Flow module, inverter module are docked with the Energy Management System module respectively；
The output end of the DC support module is connect with the inverter module and the synchronous rectification module, the synchronous rectification
The output end of module is connect with low-voltage circuit breaker, and the output end of low-voltage circuit breaker is connected to common network transmission line of electricity, low-voltage circuit breaker
Output end by normally closed switch with concentrate user supply line be connected to, the inverter module pass through normal open switch with concentrate use
The supply line at family is connected to；
The inverter module is high-frequency PWM inverter, and the inverter module uses three-level three-phase full bridge structure, output to use
LCL connections；
The synchronous rectification module is high-frequency PWM rectifier, and the synchronous rectification module uses three-level three-phase full bridge structure, directly
Galvanic electricity is held connects zero curve using neutral point Split type；
The synchronous rectification module is used using DC voltage outer shroud and current on line side inner ring two close cycles tracing control, modulation system
SPWM modulation systems；
The synchronous rectification module is using fuzzy PI hybrid control and Repetitive controller mixed-control mode；
The Energy Management System module is uniformly coordinated above-mentioned synchronous rectification module, inverter module, transmission of electricity conditioning module
Control；
The DC power supply is any one in wind power generation, solar power generation, geother-mal power generation, marsh gas power generation；
The DC support module is DC capacitor；
A kind of distribution type electric energy power supply system, including at least two distributed digital Power quality management devices and common network transmission of electricity
Circuit, each distributed digital Power quality management device are all connected on common network transmission line of electricity；
Each distributed digital Power quality management device is at least powered one group of concentration user.
Priority Applications (1)
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|---|---|---|---|
| CN201510587975.3A CN105119287B (en) | 2015-09-16 | 2015-09-16 | A kind of distributed digital Power quality management device and power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510587975.3A CN105119287B (en) | 2015-09-16 | 2015-09-16 | A kind of distributed digital Power quality management device and power supply system |
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| Publication Number | Publication Date |
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| CN105119287A CN105119287A (en) | 2015-12-02 |
| CN105119287B true CN105119287B (en) | 2018-11-09 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101291071A (en) * | 2008-06-18 | 2008-10-22 | 张皓 | Electric inverter for direct grid connecting of wind power generation |
| CN101976879A (en) * | 2010-10-27 | 2011-02-16 | 上海交通大学 | Mobile emergency power supply based on system converter |
| CN102270851A (en) * | 2011-07-18 | 2011-12-07 | 青岛敏深风电科技有限公司 | High efficient and intelligent grid-connected system of wind driven generator |
| CN102361345A (en) * | 2011-10-21 | 2012-02-22 | 浙江大学 | Seamless switching control method for uninterrupted power supply of fuel cell |
| CN102638195A (en) * | 2012-03-31 | 2012-08-15 | 东北大学 | Solar energy generating system control device and method |
-
2015
- 2015-09-16 CN CN201510587975.3A patent/CN105119287B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101291071A (en) * | 2008-06-18 | 2008-10-22 | 张皓 | Electric inverter for direct grid connecting of wind power generation |
| CN101976879A (en) * | 2010-10-27 | 2011-02-16 | 上海交通大学 | Mobile emergency power supply based on system converter |
| CN102270851A (en) * | 2011-07-18 | 2011-12-07 | 青岛敏深风电科技有限公司 | High efficient and intelligent grid-connected system of wind driven generator |
| CN102361345A (en) * | 2011-10-21 | 2012-02-22 | 浙江大学 | Seamless switching control method for uninterrupted power supply of fuel cell |
| CN102638195A (en) * | 2012-03-31 | 2012-08-15 | 东北大学 | Solar energy generating system control device and method |
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Address after: 528308 North 4 Lunjiao Xinxi Fourth Road, Shunde District, Foshan City, Guangdong Province Patentee after: Shengye Electric Co., Ltd. Address before: 528308 North 4 Lunjiao Xinxi Fourth Road, Shunde District, Foshan City, Guangdong Province Patentee before: SHENGYE ELECTRICAL CO., LTD. |