CN105245002A - Seamless switching control system of micro-grid - Google Patents
Seamless switching control system of micro-grid Download PDFInfo
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- CN105245002A CN105245002A CN201510625442.XA CN201510625442A CN105245002A CN 105245002 A CN105245002 A CN 105245002A CN 201510625442 A CN201510625442 A CN 201510625442A CN 105245002 A CN105245002 A CN 105245002A
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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
Abstract
The invention discloses a seamless switching control system of a micro-grid. The seamless switching control system comprises a local control layer, a coordination control layer and a system monitoring and optimization control layer, wherein the local control layer comprises a micro-source controller (MC), a load controller (LC), a grid-connected switch controller (SC) and a running mode controller (MSC), the coordination control layer comprises a micro-grid system controller (MGCC), and the system monitoring and optimization control layer comprises a micro-grid energy management system (EMS). By the seamless switching control system, grid-connected power generation can be achieved, and high-quality power supply also can be provided for a user in an off-network mode. With the adoption of a control strategy, the utilization of an energy storage device and electric energy can be optimal by a low-voltage micro-grid system.
Description
Technical field
The present invention relates to electrical network field, be specially micro-capacitance sensor seamless switching control system.
Background technology
At present; micro-capacitance sensor is the small size power supplying system be made up of elementary cells such as distributed power source, energy storage, energy conversion device, load and Control protection system; both can with power distribution network parallel running, realize Tie line Power controlled, also can power to important load under lonely net form formula.Therefore, micro-capacitance sensor significantly can reduce the adverse effect that intermittent distributed power source brings to power distribution network, maximally utilises distributed power source and exerts oneself, and improves power supply reliability and the quality of power supply.With micro-capacitance sensor form, distributed power source is accessed power distribution network, obtain the extensive concern of Chinese scholars.
Micro-grid system cooperation control is the core content of micro-capacitance sensor research, and its major control target is: one, when being incorporated into the power networks, and realizes controlled the utilization with distributed power source of also site trend and maximizes; Two, when isolated power grid, the stable operation of system is realized; Three, outside electric network fault or plan isolated island time, realize grid-connected with the fast and smooth handoff from network operation pattern.Wherein, taking over seamlessly of micro-capacitance sensor operational mode is the Focal point and difficult point of coordinated control system functional realiey.
Summary of the invention
Technical problem solved by the invention is to provide a kind of micro-capacitance sensor seamless switching control system, to solve the shortcoming in above-mentioned background technology.
Technical problem solved by the invention realizes by the following technical solutions: micro-capacitance sensor seamless switching control system, comprises key-course, cooperation control layer and system monitoring and optimal control layer on the spot,
Described key-course on the spot comprises micro-source controller (MC), load governor (LC), grid-connected on-off controller (SC) and operational mode controller (MSC), realizes the integrated supervisory and control to distributed power source, energy-storage system and load by described micro-source controller (MC) and load governor (LC); Described grid-connected on-off controller (SC) realizes the observing and controlling of high-speed switch, and completes the quick sequencing control in micro-capacitance sensor operational mode handoff procedure with described operational mode controller (MSC);
Described cooperation control layer comprises micro-grid system controller (MGCC), and described micro-grid system controller (MGCC) and operational mode controller (MSC) complete micro-capacitance sensor operational mode handoff functionality jointly; Described micro-grid system controller (MGCC) by carrying out arranging to the control model in each micro-source and controling parameters and regulating, power when realizing grid-connected and utility power quality control and from system stable operation when netting;
Described system monitoring and optimal control layer comprise microgrid energy management system (EMS), can realize the functions such as real time information monitoring, historical information storage, Systematical control, economic optimization operation and report form statistics.
In the present invention, further, the distributed power source controlled in described micro-source controller (MC) comprises the power distribution network energy, photovoltaic energy, wind energy, the storage battery energy and enterprise's self power generation energy.
In the present invention, further, 3 cover 500kW lead-acid battery energy-storage systems are configured in described micro-capacitance sensor, as the core component that micro-capacitance sensor runs.
In the present invention, further, in described micro-capacitance sensor, 10kV bus is also comprised and for the AD/DC switch between connection bus and each distributed power source.
In the present invention, further, in described micro-grid system controller (MGCC), permanent magnetic vacuum breaker is adopted.
Beneficial effect of the present invention: not only can generate electricity by way of merging two or more grid systems but also high-quality supply of electric power can be provided for user by off-grid.Owing to adopting this control strategy, low pressure micro-grid system may make energy storage device and utilization of power reach optimization.
Accompanying drawing explanation
Fig. 1 is micro-capacitance sensor seamless switching Control system architecture schematic diagram.
Embodiment
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the present invention further.
As shown in Figure 1, micro-capacitance sensor seamless switching control system, comprise key-course, cooperation control layer and system monitoring and optimal control layer on the spot, described key-course on the spot comprises micro-source controller (MC), load governor (LC), grid-connected on-off controller (SC) and operational mode controller (MSC), realizes the integrated supervisory and control to distributed power source, energy-storage system and load by described micro-source controller (MC) and load governor (LC); Described grid-connected on-off controller (SC) realizes the observing and controlling of high-speed switch, and completes the quick sequencing control in micro-capacitance sensor operational mode handoff procedure with described operational mode controller (MSC); Described cooperation control layer comprises micro-grid system controller (MGCC), and described micro-grid system controller (MGCC) and operational mode controller (MSC) complete micro-capacitance sensor operational mode handoff functionality jointly; Described micro-grid system controller (MGCC) by carrying out arranging to the control model in each micro-source and controling parameters and regulating, power when realizing grid-connected and utility power quality control and from system stable operation when netting; Described system monitoring and optimal control layer comprise microgrid energy management system (EMS), can realize the functions such as real time information monitoring, historical information storage, Systematical control, economic optimization operation and report form statistics.
In the present invention, further, the distributed power source controlled in described micro-source controller (MC) comprises the power distribution network energy, photovoltaic energy, wind energy, the storage battery energy and enterprise's self power generation energy.3 cover 500kW lead-acid battery energy-storage systems are configured, as the core component that micro-capacitance sensor runs in described micro-capacitance sensor.10kV bus is also comprised and for the AD/DC switch between connection bus and each distributed power source in described micro-capacitance sensor.Permanent magnetic vacuum breaker is adopted in described micro-grid system controller (MGCC).
The l0kV high-voltage quick switch that micro-grid connection point is selected is permanent magnetic vacuum breaker.For meeting the requirement that micro-capacitance sensor operational mode switches, switch operating mechanism is on the basis of original permanent-magnet structure, increase big current quick acting switching-off repulsive force mechanism, the whole group of time of switch separating brake is made to be less than 20ms, and operate time, freedom was very little, effectively reduce voltage transient process, be conducive to the seamless switching of system running pattern.
In energy-storage system, according to systemic-function and workload demand, configure 3 cover 500kW lead-acid battery energy-storage systems in micro-capacitance sensor, as the core component that micro-capacitance sensor runs.When system grid connection is run, 3 energy accumulation current converters (PCS) all adopt PQ to control, and participate in power adjustments.During isolated power grid, a PCS, as main frame, adopts VF control model, provides the electric voltage frequency of system to support; Other 2 PCS are from machine, still run in PQ mode, participate in system power balance.PCS is by external control command selection operational mode.In addition, to run to the requirement of isolated power grid pattern seamless switching in micro-grid connection for meeting main PCS, initial phase angle logic is added in VF controls, namely run the initial time transferring VF to and run by PQ at PCS, using current time phase-locked loop measured value as initial voltage phase angle, make voltage waveform in handoff procedure continuous, effectively reduce transient process, be conducive to seamlessly transitting of system running pattern.
More than show and describe general principle of the present invention and principal character and advantage of the present invention; the technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications; these changes and improvements all fall in the claimed scope of the invention, and application claims protection range is defined by appending claims and equivalent thereof.
Claims (5)
1. micro-capacitance sensor seamless switching control system, comprises key-course, cooperation control layer and system monitoring and optimal control layer on the spot, it is characterized in that:
Described key-course on the spot comprises micro-source controller (MC), load governor (LC), grid-connected on-off controller (SC) and operational mode controller (MSC), realizes the integrated supervisory and control to distributed power source, energy-storage system and load by described micro-source controller (MC) and load governor (LC); Described grid-connected on-off controller (SC) realizes the observing and controlling of high-speed switch, and completes the quick sequencing control in micro-capacitance sensor operational mode handoff procedure with described operational mode controller (MSC);
Described cooperation control layer comprises micro-grid system controller (MGCC), and described micro-grid system controller (MGCC) and operational mode controller (MSC) complete micro-capacitance sensor operational mode handoff functionality jointly; Described micro-grid system controller (MGCC) by carrying out arranging to the control model in each micro-source and controling parameters and regulating, power when realizing grid-connected and utility power quality control and from system stable operation when netting;
Described system monitoring and optimal control layer comprise microgrid energy management system (EMS), can realize the functions such as real time information monitoring, historical information storage, Systematical control, economic optimization operation and report form statistics.
2. micro-capacitance sensor seamless switching control system according to claim 1, is characterized in that: the distributed power source controlled in described micro-source controller (MC) comprises the power distribution network energy, photovoltaic energy, wind energy, the storage battery energy and enterprise's self power generation energy.
3. micro-capacitance sensor seamless switching control system according to claim 1, is characterized in that: configure 3 cover 500kW lead-acid battery energy-storage systems in described micro-capacitance sensor, as the core component that micro-capacitance sensor runs.
4. micro-capacitance sensor seamless switching control system according to claim 1, is characterized in that: in described micro-capacitance sensor, also comprise 10kV bus and for the AD/DC switch between connection bus and each distributed power source.
5. micro-capacitance sensor seamless switching control system according to claim 1, is characterized in that: in described micro-grid system controller (MGCC), adopt permanent magnetic vacuum breaker.
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| CN106026176A (en) * | 2016-07-08 | 2016-10-12 | 常州天合光能有限公司 | Micro-grid black start system based on distributed energy and black start method thereof |
| CN106684868A (en) * | 2017-02-23 | 2017-05-17 | 南京航空航天大学 | Electric power distribution method of hierarchical Internet micro-grid |
| CN107017649A (en) * | 2017-03-30 | 2017-08-04 | 先控捷联电气股份有限公司 | Electric power system and power supply processing method |
| CN107508313A (en) * | 2017-08-02 | 2017-12-22 | 中南大学 | A kind of micro-capacitance sensor and off-network control method and device |
| CN108923467A (en) * | 2018-09-17 | 2018-11-30 | 清远电力规划设计院有限公司 | A kind of industry zone type wind-light storage fills micro-grid system |
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| CN106026176A (en) * | 2016-07-08 | 2016-10-12 | 常州天合光能有限公司 | Micro-grid black start system based on distributed energy and black start method thereof |
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| CN107017649A (en) * | 2017-03-30 | 2017-08-04 | 先控捷联电气股份有限公司 | Electric power system and power supply processing method |
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| CN108923467A (en) * | 2018-09-17 | 2018-11-30 | 清远电力规划设计院有限公司 | A kind of industry zone type wind-light storage fills micro-grid system |
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Application publication date: 20160113 |