CN105958517A - Micro grid energy optimization control and management system based on Internet technology - Google Patents

Micro grid energy optimization control and management system based on Internet technology Download PDF

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Publication number
CN105958517A
CN105958517A CN201610399955.8A CN201610399955A CN105958517A CN 105958517 A CN105958517 A CN 105958517A CN 201610399955 A CN201610399955 A CN 201610399955A CN 105958517 A CN105958517 A CN 105958517A
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capacitance sensor
micro
network
grid
load
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CN105958517B (en
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不公告发明人
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Jiangsu Dada Electric Power Co Ltd
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/26Arrangements for eliminating or reducing asymmetry in polyphase networks
    • H02J13/0013
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/04Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
    • H02J3/06Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20Smart grids as enabling technology in buildings sector
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/50Arrangements for eliminating or reducing asymmetry in polyphase networks
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70Smart grids as climate change mitigation technology in the energy generation sector
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S40/00Systems 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
    • Y04S40/12Systems 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
    • Y04S40/126Systems 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
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S40/00Systems 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
    • Y04S40/12Systems 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
    • Y04S40/128Systems 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 involving the use of Internet protocol

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

The invention provides a micro grid energy optimization control and management system based on the Internet technology. The system is characterized in that each micro grid and a large grid are connected through an isolation switch and an isolation transformer, and the connection with and isolation from the large grid are realized through the switch-on and switch-off of the isolation switch. At the same time, adjacent micro grids carry out electric energy mutual supplement through a two-direction switch. A scheduling control client accesses a background management server through a VPN. The micro grids and the two-direction switch communicate through the VPN and the background management server. According to the invention, the Internet technology is used, the backup and data analysis of each micro grid are carried out at a cloud end such that the coordination between the large grid and the micro grids and between the micro grids is improved, the technical problem of three-phase load unbalance is solved fundamentally by using the load commutation technology, and thus the micro grids can operate more healthily and efficiently.

Description

A kind of microgrid energy Optimum Regulation based on Internet technology management system
Technical field
The invention belongs to intelligent grid field, particularly relate to a kind of microgrid energy Optimum Regulation based on Internet technology management system.
Background technology
Along with new energy resources system such as the development growth of power system, increasing micro-capacitance sensor access systems, such as small-sized solar electric station, biomass power generation, wind-powered electricity generation.At present, the commonly used master-slave control method of micro-capacitance sensor, independent it is attached with bulk power grid and is capable of being incorporated into the power networks and off-network is run, but so simply achieve the connection of micro-capacitance sensor and bulk power grid, still can not connect between each micro-capacitance sensor closed on, meanwhile, the making full use of of high in the clouds control realization each micro-capacitance sensor energy of micro-capacitance sensor can't be realized.Micro-capacitance sensor capacity is smaller, anti-risk power is little, in the problem that run duration is frequently encountered by three load unbalanced three current imbalances caused, solution is the mode using reactive-load compensation mostly, and therefore traditional control system can not carry out basic management to three within micro-capacitance sensor are load unbalanced.
Summary of the invention
The present invention solves and can not interconnect between current micro-capacitance sensor and internal three the load unbalanced technical problems of micro-capacitance sensor, propose a kind of microgrid energy Optimum Regulation based on Internet technology management system.
The technical scheme is that a kind of microgrid energy Optimum Regulation based on Internet technology manages system, it is characterized in that: each micro-capacitance sensor all carries out grid-connected with isolating transformer with bulk power grid by disconnecting switch, and cut-off, by described disconnecting switch, the connection and isolation realized with bulk power grid;Mutual the supplementing of electric energy is carried out by two-way switch between the most each adjacent described micro-capacitance sensor;Described scheduling controlling client accesses back-stage management server by VPN private network;Described micro-capacitance sensor and described two-way switch are all communicated with described back-stage management server by described VPN private network;Described VPN private network is an off the private line network that public network runs, for ensureing the safety of network operation;Described two-way switch includes: one-way SCR A, one-way SCR B, Wi-Fi module, power module, microprocessor;Described one-way SCR A and one-way SCR B reversely installs and is respectively coupled to described microprocessor.
Further, it is also equipped with in described micro-capacitance sensor: operation controller, for controlling the operation of described each equipment of micro-capacitance sensor;Load operation watch-dog, is coupled to described operation controller for monitoring the load operating region of each circuit;Grid-connected protector, is coupled to described operation controller for protecting described micro-capacitance sensor not disturbed by bulk power grid when being incorporated into the power networks;Three-phase load unbalance controller, is coupled to described operation controller by using load commutated technology for balancing three balance movements of described micro-capacitance sensor;Network service supervisor, is coupled to described operation controller by described VPN private network for communicating with described back-stage management server;Described load operation watch-dog mainly monitors the monitoring of sensitive load, and described sensitive load includes: the high-power power loads such as motor, central air-conditioning, electric heating machine.
Further, described three-phase load unbalance controller is analyzed contrast according to running voltage, the operating current of each circuit, fractional load in individual event bigger for operating current is switched on the individual event circuit that operating current is less, fundamentally solves three load unbalanced technical problems with this;When separate switching, power-interrupt time is within 20mS, and because the control circuit of the household electrical appliance of single-phase electricity consumption all has filtering and storage capacitor, the instant cut-off within 20mS will not cause the reset of household electrical appliance, therefore on power supply quality without impact.
Further, described scheduling controlling client accesses described back-stage management server by described VPN private network and in the same time, described micro-capacitance sensor and two-way switch can be coordinated control;The running status of each micro-capacitance sensor can be calculated by tidal current analysis and neural network algorithm and how remove each micro-capacitance sensor;The described regulation and control to micro-capacitance sensor include: by described two-way switch carry out the electric energy of adjacent electrical network supplement with scheduling, described micro-capacitance sensor is converted under grid-connected duty off-network mode runs, described micro-capacitance sensor be converted under off-network duty that synchronizing mode runs, the generation schedule of described micro-capacitance sensor controls, the start of described micro-capacitance sensor/shutdowns control.
Further, described micro-capacitance sensor described operation controller when grid-connect mode runs uses the P/Q method of operation, and described micro-capacitance sensor described operation controller when off-network mode operation uses the F/V method of operation;Under grid-connected duty, it is converted into off-network mode at described micro-capacitance sensor to run and described micro-capacitance sensor is converted into described operation controller when synchronizing mode runs under off-network duty and also will switch between the P/Q method of operation and the F/V method of operation automatically, it is achieved the continual power supply of load of described micro-capacitance sensor region.
Benefit of the present invention: present invention uses Internet technology, bulk power grid is more coordinated each micro-capacitance sensor and device backup, data analysis with micro-capacitance sensor beyond the clouds, when bulk power grid fault, each micro-capacitance sensor also is able to, by two-way switch, the electric energy that complements each other so that the utilization rate of electric energy is more efficiently, fast;Inside to each micro-capacitance sensor has been also carried out the management become more meticulous simultaneously, uses load commutated technology fundamentally to solve three load unbalanced technical problems so that micro-capacitance sensor can the operation of more efficient and healthful.
Accompanying drawing explanation
Fig. 1 is the theory diagram of system of the present invention.
Fig. 2 is the theory diagram of two-way switch of the present invention.
In figure, 1-bulk power grid;2-isolating transformer;3-disconnecting switch;4-micro-capacitance sensor;The two-way switch of 5-;6-VPN private network;7-back-stage management server;8-scheduling controlling client;41- Operation controller;42-load operation watch-dog;The grid-connected protector of 43-;44-three-phase load unbalance controller;45-network service supervisor;51-microprocessor;52-power module;53- Wi-Fi module;54-one-way SCR A;55-one-way SCR B.
Detailed description of the invention
Being described principle and the feature of the present invention below in conjunction with accompanying drawing, example is served only for explaining the present invention, is not intended to limit the scope of the present invention.
Needing to illustrate in advance, " coupling " includes but not limited to " physical connection ", such as, can be connected by cable, it is also possible to " connect " by the way of photoelectric coupling or electromagnetic coupled between the operation controller 41 shown in Fig. 1 and grid-connected protector 43.
Embodiment: a kind of microgrid energy Optimum Regulation based on Internet technology management system, the method provided the present invention in conjunction with accompanying drawing elaborates.
A kind of microgrid energy Optimum Regulation based on Internet technology management system, it is characterized in that: each micro-capacitance sensor 4 all carries out grid-connected with isolating transformer 2 with bulk power grid 1 by disconnecting switch 3, and cut-off, by described disconnecting switch 3, the connection and isolation realized with bulk power grid 1;Mutual the supplementing of electric energy is carried out by two-way switch 5 between the most each adjacent described micro-capacitance sensor 4;Described scheduling controlling client 8 accesses back-stage management server 7 by VPN private network 6;Described micro-capacitance sensor 4 and described two-way switch 5 are all communicated with described back-stage management server 7 by described VPN private network 6;Described VPN private network 6 is an off the private line network that public network runs, for ensureing the safety of network operation;Described two-way switch 5 includes: one-way SCR A54, one-way SCR B55, Wi-Fi module 53, power module 52, microprocessor 51;Described one-way SCR A54 and one-way SCR B55 reversely installs and is respectively coupled to described microprocessor 51.
Further, it is also equipped with in described micro-capacitance sensor 4: operation controller 41, for controlling the operation of described each equipment of micro-capacitance sensor 4;Load operation watch-dog 42, is coupled to described operation controller 41 for monitoring the load operating region of each circuit;Grid-connected protector 43, is coupled to described operation controller 41 for protecting described micro-capacitance sensor 4 when being incorporated into the power networks not by the interference of bulk power grid 1;Three-phase load unbalance controller 44, is coupled to described operation controller 41 by using load commutated technology for balancing 4 three balance movements of described micro-capacitance sensor;Network service supervisor 45, is coupled to described operation controller 41 by described VPN private network 6 for communicating with described back-stage management server 7;Described load operation watch-dog 42 mainly monitors the monitoring of sensitive load, and described sensitive load includes: the high-power power loads such as motor, central air-conditioning, electric heating machine.
Further, described three-phase load unbalance controller 44 is analyzed contrast according to running voltage, the operating current of each circuit, fractional load in individual event bigger for operating current is switched on the individual event circuit that operating current is less, fundamentally solves three load unbalanced technical problems with this;When separate switching, power-interrupt time is within 20mS, and because the control circuit of the household electrical appliance of single-phase electricity consumption all has filtering and storage capacitor, the instant cut-off within 20mS will not cause the reset of household electrical appliance, therefore on power supply quality without impact.
Further, described scheduling controlling client 8 accesses described back-stage management server 7 by described VPN private network 6 and in the same time, described micro-capacitance sensor 4 and two-way switch 5 can be coordinated control;The running status of each micro-capacitance sensor 4 can be calculated by tidal current analysis and neural network algorithm and how remove each micro-capacitance sensor 4;The described regulation and control to micro-capacitance sensor 4 include: by described two-way switch 5 carry out the electric energy of adjacent electrical network supplement with scheduling, described micro-capacitance sensor 4 is converted under grid-connected duty off-network mode runs, described micro-capacitance sensor 4 be converted under off-network duty that synchronizing mode runs, the generation schedule of described micro-capacitance sensor 4 controls, the start of described micro-capacitance sensor 4/shutdowns control.
Further, described micro-capacitance sensor 4 described operation controller 41 when grid-connect mode runs uses the P/Q method of operation, and described micro-capacitance sensor 4 described operation controller 41 when off-network mode operation uses the F/V method of operation;Under grid-connected duty, it is converted into off-network mode at described micro-capacitance sensor 4 to run and described micro-capacitance sensor 4 is converted into described operation controller 41 when synchronizing mode runs under off-network duty and also will switch between the P/Q method of operation and the F/V method of operation automatically, it is achieved the continual power supply of load of described micro-capacitance sensor 4 region.
The above; being only the detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in the technical scope that the invention discloses; change can be readily occurred in or replace, all should contain within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with scope of the claims.

Claims (5)

1. microgrid energy Optimum Regulation based on an Internet technology management system, it is characterized in that: each micro-capacitance sensor (4) all carries out grid-connected with isolating transformer (2) with bulk power grid (1) by disconnecting switch (3), and realized and the connection of bulk power grid (1) and isolation by cut-offfing of described disconnecting switch (3);Mutual the supplementing of electric energy is carried out by two-way switch (5) between the most each adjacent described micro-capacitance sensor (4);Described scheduling controlling client (8) accesses back-stage management server (7) by VPN private network (6);Described micro-capacitance sensor (4) and described two-way switch (5) are all communicated with described back-stage management server (7) by described VPN private network (6);Described VPN private network (6) is an off the private line network that public network runs, for ensureing the safety of network operation;Described two-way switch (5) includes: one-way SCR A(54), one-way SCR B(55), Wi-Fi module (53), power module (52), microprocessor (51);Described one-way SCR A(54) and one-way SCR B(55) reversely install and be respectively coupled to described microprocessor (51).
A kind of microgrid energy Optimum Regulation based on Internet technology the most according to claim 1 management system, it is characterized in that: described micro-capacitance sensor is also equipped with in (4): operation controller (41), be used for controlling the operation of described micro-capacitance sensor (4) each equipment;Load operation watch-dog (42), is coupled to described operation controller (41) for monitoring the load operating region of each circuit;Grid-connected protector 43, is coupled to described operation controller (41) and is used for protecting described micro-capacitance sensor (4) when being incorporated into the power networks not by the interference of bulk power grid (1);Three-phase load unbalance controller (44), is coupled to described operation controller (41) by using load commutated technology to be used for balancing (4) three balance movements of described micro-capacitance sensor;Network service supervisor (45), is coupled to described operation controller (41) by described VPN private network (6) for communicating with described back-stage management server (7);Described load operation watch-dog (42) mainly monitors the monitoring of sensitive load, and described sensitive load includes: the high-power power loads such as motor, central air-conditioning, electric heating machine.
A kind of microgrid energy Optimum Regulation based on Internet technology the most according to claim 2 management system, it is characterized in that: described three-phase load unbalance controller (44) is analyzed contrast according to running voltage, the operating current of each circuit, fractional load in individual event bigger for operating current is switched on the individual event circuit that operating current is less, fundamentally solves three load unbalanced technical problems with this;When separate switching, power-interrupt time is within 20mS, and because the control circuit of the household electrical appliance of single-phase electricity consumption all has filtering and storage capacitor, the instant cut-off within 20mS will not cause the reset of household electrical appliance, therefore on power supply quality without impact.
A kind of microgrid energy Optimum Regulation based on Internet technology the most according to claim 1 management system, it is characterised in that: described scheduling controlling client (8) accesses described back-stage management server (7) by described VPN private network (6) can coordinate control in the same time to described micro-capacitance sensor (4) and two-way switch (5);The running status of each micro-capacitance sensor (4) can be calculated by tidal current analysis and neural network algorithm and how remove each micro-capacitance sensor (4);The described regulation and control to micro-capacitance sensor (4) include: by described two-way switch (5) carry out the electric energy of adjacent electrical network supplement with scheduling, described micro-capacitance sensor (4) is converted under grid-connected duty off-network mode runs, described micro-capacitance sensor (4) be converted under off-network duty that synchronizing mode runs, the generation schedule of described micro-capacitance sensor (4) controls, the start of described micro-capacitance sensor (4)/shutdowns control.
A kind of microgrid energy Optimum Regulation based on Internet technology the most according to claim 1 management system, it is characterized in that: described micro-capacitance sensor (4) described operation controller (41) when grid-connect mode runs uses the P/Q method of operation, described micro-capacitance sensor (4) described operation controller (41) when off-network mode operation uses the F/V method of operation;Under grid-connected duty, it is converted into off-network mode at described micro-capacitance sensor (4) to run and described micro-capacitance sensor (4) is converted into described operation controller (41) when synchronizing mode runs under off-network duty and also will switch between the P/Q method of operation and the F/V method of operation automatically, it is achieved the continual power supply of load of described micro-capacitance sensor (4) region.
CN201610399955.8A 2016-06-08 2016-06-08 A kind of microgrid energy Optimum Regulation management system based on Internet technology Active CN105958517B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201323469Y (en) * 2008-12-02 2009-10-07 河南辉煌科技股份有限公司 Intelligent multi-power supply switch
CN202586493U (en) * 2011-09-25 2012-12-05 国网电力科学研究院 Micro electrical network energy management system
CN102842914A (en) * 2012-08-02 2012-12-26 中国电力科学研究院 Energy storage power station monitoring system
CN104078971A (en) * 2014-07-10 2014-10-01 广东工业大学 Microgrid three-phase-balanced and electricity-optimized sub-grid structure and control method
CN104242326A (en) * 2013-06-18 2014-12-24 李春明 Three-phase load balancer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201323469Y (en) * 2008-12-02 2009-10-07 河南辉煌科技股份有限公司 Intelligent multi-power supply switch
CN202586493U (en) * 2011-09-25 2012-12-05 国网电力科学研究院 Micro electrical network energy management system
CN102842914A (en) * 2012-08-02 2012-12-26 中国电力科学研究院 Energy storage power station monitoring system
CN104242326A (en) * 2013-06-18 2014-12-24 李春明 Three-phase load balancer
CN104078971A (en) * 2014-07-10 2014-10-01 广东工业大学 Microgrid three-phase-balanced and electricity-optimized sub-grid structure and control method

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