CN102842915B - Grid-connected inverter with information integration function - Google Patents
Grid-connected inverter with information integration function Download PDFInfo
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- CN102842915B CN102842915B CN201210302907.4A CN201210302907A CN102842915B CN 102842915 B CN102842915 B CN 102842915B CN 201210302907 A CN201210302907 A CN 201210302907A CN 102842915 B CN102842915 B CN 102842915B
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- 230000010354 integration Effects 0.000 title abstract 2
- 238000004891 communication Methods 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 238000012544 monitoring process Methods 0.000 claims abstract description 10
- 238000003491 array Methods 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 9
- 230000001172 regenerating effect Effects 0.000 claims description 7
- 230000013011 mating Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 238000007726 management method Methods 0.000 description 10
- 230000002452 interceptive effect Effects 0.000 description 3
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- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
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- 238000005859 coupling reaction Methods 0.000 description 1
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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
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
- Y04S10/123—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving renewable energy sources
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Abstract
The invention discloses a grid-connected inverter with an information integration function, relating to the field of microgrids and distributed renewable energy sources. The grid-connected inverter comprises a control unit, a timestamp module, an inverter main circuit, a detection module, a communication module and a clock module. The grid-connected inverter disclosed by the invention also has a 'controlled' operation mode except for having the traditional 'autonomous' operating mode free of intervene of a power grid monitoring system. The power grid monitoring system can ensure that the grid-connected inverter can be switched between the 'autonomous' operation mode and the 'controlled' operation mode by instructions. When the grid-connected inverter works in the 'controlled' mode, the power grid monitoring system can send a real-time control instruction to the grid-connected inverter through the instruction and set a working state and operating parameters of the grid-connected inverter. The grid-connected inverter disclosed by the invention has the advantages of rapidness and convenience for grid-connected scheduling and electric energy management of distributed renewable energy sources and capability of effectively improving the utilization rate of renewable energy sources.
Description
Technical field
The present invention relates to a kind of combining inverter possessing information integerated function, belong to micro-capacitance sensor and distribution type renewable energy field.
Background technology
Information technology will have vital effect in the intelligent grid in future, because have a large amount of intelligent power equipments by real-time performance information interaction.For combining inverter, this equipment is distributed widely in the micro-capacitance sensor of all kinds and scale, for the power delivery that produced by distribution type renewable energy to electrical network or terminal electric power users.Under these conditions, combining inverter must carry out the real-time, interactive of various information with the electric power management system in intelligent grid, other intelligent power equipments or electric power users in real time.
Distributed power source, owing to being subject to the impact of region and weather, has obvious uncertainty in power supply capacity and the quality of power supply.But, the function of combining inverter in the market in communication and control is all weaker, the requirement building intelligent grid cannot be reached, major embodiment is in the following areas: 1) major part is only equipped with simple RS485 bus interface, data transmission bauds is low, data volume is also less, is not suitable for carrying out real-time high speed data transfer, thus cannot adapt to the requirement that following intelligent grid transmits for power information; 2) function of transmission operation information is only possessed, and the running status of self (grid-connected power supply or quit work) independently determines according to the voltage of input (from regenerative resource) and the factor such as voltage, electric current, frequency of output (getting access to grid), supervisory control system can only gather the operation information of inverter, but cannot control in real time it.When grid cut-off, if inverter can not detect that self is in island operation state in time, and supervisory control system cannot forced termination its run, serious potential safety hazard will be produced like this; 3) for the regenerative resource power station being arranged on remote districts, equipment runs usually in unattended situation, and supervisory control system cannot take optimum Real-Time Control Strategy to equipment; 4) a lot of load is different for the input voltage of power supply and the requirement of the quality of power supply.Such as low voltage lighting loads and DC load (computer, battery charger etc.), the input voltage of its drive circuit and power supply adaptor (Switching Power Supply), all far below city's electric standard, does not also specially require the quality of power supply.Even if the electric energy that inverter exports does not meet grid-connected requirement, still can to these load supplyings.But existing combining inverter has strict restriction to input voltage.When input voltage set point lower than inverter of the output voltage of regenerative resource, combining inverter just quits work, and thus causes the serious waste of regenerative resource.
Summary of the invention
The object of the invention is the above-mentioned deficiency overcoming prior art, there is provided a kind of and can carry out the real-time, interactive of various information with the electric power management system in intelligent grid, other intelligent power equipments or electric power users, make grid-connected scheduling and electric energy management combining inverter more fast and easily.The technical solution adopted in the present invention is:
Possesses a combining inverter for information integerated function, the converter main circuit, detection module, communication module and the clock module that comprise control unit, timestamp module and be connected with control unit; Detection module for detecting voltage and the electric current of civil power power line and distributed energy output, and is transferred to control unit; Clock module provides unified time reference for whole system, and the clock synchronization information of micro-capacitance sensor master clock when receiving by communication module, local clock is corrected; The real time data that timestamp module is used for transmitting to communication module adds timestamp; Communication module is connected to information network or the power monitoring network of micro-capacitance sensor by network interconnection apparatus, network interconnection; Control unit is according to the input information of detection module, and the electric energy that distributed energy exports is converted to the alternating current that can access electrical network by control inverter main circuit, and controls other module cooperative work.
Preferably, described combining inverter is except traditional " independently " operational mode not by grid monitoring system intervention, also there is " controlled " operational mode, when combining inverter is operated in " controlled " pattern, the supervisory control system of electrical network sends real time control command by instruction to it, setting its operating state is that generating state still quits work state, and sets operational factor; When combining inverter power-up initializing, enter " independently " operational mode; Combining inverter can send the application of operational mode switching to supervisory control system, but self can not carry out the switching of operational mode.
Combining inverter of the present invention carries out the real-time, interactive of various information by the electric power management system in Fast Ethernet and intelligent grid, other intelligent power equipments or electric power users, thus makes the monitoring of tools of micro-capacitance sensor, grid-connected scheduling and electric energy management more efficient and convenient.Also realize the grid-connected management of distributed power source by " electric energy router " and distributed power source ran with load optimized coupling, thus effectively can improve the utilance of regenerative resource.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the combining inverter possessing information integerated function and the typical connected mode with electrical network and load thereof;
Fig. 2 is the structured flowchart of electric energy router;
Fig. 3 is the connected mode of input and electric energy metering module and switch arrays and control unit;
Fig. 4 is the typical apply that combining inverter is connected with load by electric energy router.
Embodiment
Below in conjunction with embodiment and accompanying drawing, a kind of combining inverter possessing information integerated function of the present invention is described in detail.
1. possess formation and the operation principle of the combining inverter of information integerated function
See Fig. 1, a kind of combining inverter possessing information integerated function of the present invention, comprising: control unit, converter main circuit, detection module, human-computer interface module, communication module, clock module and timestamp module composition; Output and the control unit of converter main circuit and electrical network, distributed energy (photovoltaic, wind-powered electricity generation etc.) are connected, and convert industrial-frequency alternating current to for the electric energy produced by distributed energy; Output and the control unit of detection module and power line, distributed energy (photovoltaic, wind-powered electricity generation etc.) are connected, the voltage and current exported for the voltage and current to power line, distributed energy and environmental parameter (temperature, illumination etc.) are sampled, and real-time Transmission is to control unit; Communication module and control unit and timestamp model calling, and be connected to information network or the power monitoring network of micro-capacitance sensor by network interconnection apparatus, network interconnection, for realizing the transmission of all kinds of real time data, control information, state information and real time clock information; Timestamp module is connected with communication module and real-time clock module, and the real time data transmitted for giving communication module adds timestamp; Clock module is connected with timestamp module and control unit, for whole system provides unified time reference, and the clock synchronization information of micro-capacitance sensor master clock when receiving by communication module, and local clock is corrected; Control unit is connected with converter main circuit, detection module, communication module, clock module and human-computer interface module, for realizing the function such as operation monitoring, optimum configurations, clock correction, information transmission management of combining inverter.
2. the Structure and function of electric energy router.
Combining inverter of the present invention can work together with a kind of electric energy management device being referred to as electric energy router, first introduces electric energy router below.See Fig. 2, the hardware of electric energy router comprises electric energy router control unit, wireless module, input and electric energy metering module, switch arrays and router port, also comprises some wireless modules, ethernet module, human-computer interface module etc.Electric energy router control unit is connected with electric energy metering module, switch arrays with wireless module, ethernet module, human-computer interface module, input, for realizing energy management, transfer of data and the monitoring function for each functional module of electric energy router.
Router port comprises multiple power port and multiple load port, each port has unique port numbers, each power port can connect the phase in a single phase poaer supply or three phase mains, each load port can connect the phase in a single-phase load or threephase load, power port comprises civil power power source special port and multiple common power port for being connected distributed power source and storage battery, power port can be connected with load port by switch arrays, also common power port can be connected with civil power port, to realize generating electricity by way of merging two or more grid systems of distributed energy; Switch on switch arrays is controlled by electric energy router control unit; Wireless module is connected with electric energy router control unit with ethernet module, for realizing electric energy router and being connected to the communication between the power supply of common power port or load port and load;
See Fig. 3, input and electric energy metering module comprise multiple input and electric energy metrical port, for detecting electric current, the voltage of coupled power port or load port, calculate the quality of power supply of coupled power supply and the use electrical characteristics of amount of power supply information or coupled load and power consumption, and by above-mentioned information transmission to electric energy router control unit; Input and electric energy metrical port are arranged on the junction of router port and switch arrays, but do not affect the connection of router port and switch arrays;
Electric energy router control unit by input and electric energy metrical port processing or the quality of power supply information of the power supply be connected with common power port that obtained with ethernet module by wireless module and the use electrical characteristics of load be connected with load port, mating of Power supply ability and load electrical characteristics is carried out according to above-mentioned information, each realizing matching by switch arrays is connected to connection between the power supply of common power port and load or switching, and carries out Electro-metering in the process powered to the load by electric energy router at power supply.Combining inverter of the present invention can be connected to the common power port of electric energy router, by wireless module to the electric energy router transmission power supply information (comprising running status, output voltage, electric current, frequency, power supply quality etc.) of power supply or the operating characteristic (running status, input voltage, electric current etc.) of load.
3. combining inverter grid-connected management and with load mate running
See Fig. 4, the combining inverter possessing information integerated function realizes following functions by electric energy router: 1) power to the load; 2) grid-connected power supply.
Various load is different for the input voltage of power supply and the requirement of the quality of power supply, such as low voltage lighting loads and DC load (computer, battery charger etc.), its drive circuit and power supply adaptor (Switching Power Supply) all have very wide input voltage range, can far below line voltage.Even if the electric energy that inverter exports does not meet grid-connected requirement, still can to these load supplyings.
For realizing running with mating of load, the quality of power supply information that electric energy router provides according to combining inverter and the use electrical characteristics with load, carry out mating of Power supply ability and load electrical characteristics, each realizing matching by switch arrays is connected to connection between the combining inverter electric energy output end of common power port and load or switching, and carries out Electro-metering in the process of power supply.
1) combining inverter exports when meeting grid-connected requirement, and electric energy router checks the need for electricity of load, and controls combining inverter and be preferably local load supplying.When the power supply of combining inverter exceeds the demand of local load, electric energy router makes combining inverter be electrically connected with city by switch arrays, realizes grid-connected;
2) when combining inverter output does not meet grid-connected requirement, traditional combining inverter will quit work automatically.But in the present invention, electric energy router is mated according to the need for electricity of load with the output characteristic of combining inverter, control inverter to be applicable to load supplying, to realize making full use of of regenerative resource.
4. the mode of operation of combining inverter
Perform following operation after possessing the combining inverter power-up initializing of information integerated function: 1) enter " independently " operational mode, do not running under can keeping this pattern in power system monitor intervention situation; 2) regularly to the running state information of supervisory control system transmission self.When electrical network needs to have a power failure, supervisory control system (or electric energy router) sends relevant information to combining inverter in advance, takes corresponding operation in time to remind combining inverter.When grid power blackout, be still in island operation state as supervisory control system inspection (or electric energy router) measures combining inverter, will following measures be taked: under 1) forcing that the combining inverter being in island operation state is switched to " controlled " pattern; 2) send instruction to combining inverter, stop it generating electricity by way of merging two or more grid systems.When power system restoration normally runs, supervisory control system (or electric energy router) sends instruction to combining inverter, makes it be switched to " independently " operational mode.
Claims (2)
1. possess a combining inverter for information integerated function, in order to support the use with electric energy router, the converter main circuit, detection module, communication module and the clock module that comprise control unit, timestamp module and be connected with control unit; Detection module for detecting voltage and the electric current of civil power power line and distributed energy output, and is transferred to control unit; Clock module provides unified time reference for whole system, and the clock synchronization information of micro-capacitance sensor master clock when receiving by communication module, local clock is corrected; The real time data that timestamp module is used for transmitting to communication module adds timestamp; Communication module is connected to information network or the power monitoring network of micro-capacitance sensor by network interconnection apparatus, network interconnection; Control unit is according to the input information of detection module, and the electric energy that distributed energy exports is converted to the alternating current that can access electrical network by control inverter main circuit, and controls other module cooperative work; Described combining inverter is used for working together with electric energy router, the quality of power supply information that electric energy router provides according to described combining inverter and the use electrical characteristics with load, carry out mating of Power supply ability and load electrical characteristics, each realizing matching by switch arrays is connected to connection between the combining inverter electric energy output end of common power port and load or switching, and carries out Electro-metering in the process of power supply:
1) when the output of described combining inverter meets grid-connected requirement, electric energy router checks the need for electricity of load, and control combining inverter and be preferably local load supplying, when the power supply of combining inverter exceeds the demand of local load, electric energy router makes combining inverter be electrically connected with city by switch arrays, realizes grid-connected;
2) when combining inverter export do not meet grid-connected requirement time, electric energy router is mated according to the need for electricity of load with the output characteristic of combining inverter, control inverter to applicable load supplying, to realize making full use of of regenerative resource;
Perform following operation after described combining inverter power-up initializing: 1) enter " independently " operational mode, do not running under can keeping this pattern in power system monitor intervention situation; 2) regularly to the running state information of supervisory control system transmission self; When electrical network needs to have a power failure, electric energy router sends relevant information to combining inverter in advance, takes corresponding operation in time to remind combining inverter; When grid power blackout, be still in island operation state as electric energy router measures combining inverter, will following measures be taked: under 1) forcing that the combining inverter being in island operation state is switched to " controlled " pattern; 2) send instruction to combining inverter, stop it generating electricity by way of merging two or more grid systems; When power system restoration normally runs, electric energy router sends instruction to combining inverter, makes it be switched to " independently " operational mode.
2. the combining inverter possessing information integerated function according to claim 1, it is characterized in that, when combining inverter is operated in " controlled " pattern, the supervisory control system of electrical network sends real time control command by instruction to it, setting its operating state is that generating state still quits work state, and sets operational factor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210302907.4A CN102842915B (en) | 2012-08-23 | 2012-08-23 | Grid-connected inverter with information integration function |
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| CN201210302907.4A CN102842915B (en) | 2012-08-23 | 2012-08-23 | Grid-connected inverter with information integration function |
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| CN102842915B true CN102842915B (en) | 2015-01-14 |
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| CN103728522B (en) * | 2014-01-21 | 2016-03-09 | 武汉理工大学 | Based on micro-grid island detection method and the system of satellite time transfer and supervising the network |
| CN103944263B (en) * | 2014-04-15 | 2016-05-11 | 北京国电通网络技术有限公司 | There is management-control method and the system of the electrical network of diversity load equipment |
| CN104265565B (en) * | 2014-08-06 | 2017-04-19 | 深圳市长昊机电有限公司 | Wind power plant real-time monitoring system and monitoring method |
| CN104638677A (en) * | 2014-10-28 | 2015-05-20 | 哈尔滨电工仪表研究所 | Energy control device of intelligent micro-grid system based on distributed type power generation |
| CN104821806B (en) * | 2015-05-12 | 2018-01-02 | 广东美的厨房电器制造有限公司 | Clock control device and its control method |
| CN112034376B (en) * | 2020-08-24 | 2023-08-29 | 哲库科技(北京)有限公司 | Power management apparatus and method |
| CN113839463A (en) * | 2021-08-27 | 2021-12-24 | 新天绿色能源股份有限公司 | Wind-solar hydrogen production control system and communication method thereof |
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| JP2008271721A (en) * | 2007-04-23 | 2008-11-06 | Power System:Kk | Power management system |
| CN102055368B (en) * | 2010-12-20 | 2013-03-27 | 江苏省电力公司南京供电公司 | 100-KVA micro-grid energy storage bidirectional converter |
| CN102185333B (en) * | 2011-04-19 | 2013-05-08 | 河南省电力公司电力科学研究院 | Method for realizing on-grid and off-grid dual-mode running of dual-directional converter in micro-grid |
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