CN203312828U - Microgrid coordinated control system - Google Patents
Microgrid coordinated control system Download PDFInfo
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- CN203312828U CN203312828U CN2013202868912U CN201320286891U CN203312828U CN 203312828 U CN203312828 U CN 203312828U CN 2013202868912 U CN2013202868912 U CN 2013202868912U CN 201320286891 U CN201320286891 U CN 201320286891U CN 203312828 U CN203312828 U CN 203312828U
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Abstract
The utility model provides a microgrid coordinated control system. A microgrid coordinated controller of the microgrid coordinated control system is connected with a distributed power supply terminal, a microgrid protection measurement and control device and a smart electric energy meter through the Ethernet. The microgrid coordinated controller timely monitors the distributed power supply terminal and sends a control instruction to the distributed power supply terminal and the microgrid protection measurement and control device according to distributed power supply monitoring information to achieve optimized operation of a microgrid. Compared with the prior art, the microgrid coordinated control system achieves that the operation of a microgrid to which various distributed power supplies access is maintenance-free and practical.
Description
Technical field
The utility model belongs to field of power, specifically relates to a kind of microgrid coordinated control system.
Background technology
In field of power, the electrical network scale constantly enlarges, and progressively develops into the super large internet system of centralized power generation, long distance power transmission at present.But the continuous increase of long distance power transmission, make the receiving end electrical network externally come the degree of dependence of electric power to improve constantly, the stability of operation of power networks and fail safe are tending towards descending, and are difficult to meet diversified power demands.Simultaneously, the problems such as global conventional energy resource is petered out, environmental pollution highlight day by day, and environmental protection, efficiently and flexibly distributed power generation is extensively favored.Distributed power generation has the advantages that position is flexible, disperse, and has adapted to admirably dispersion electricity needs and resource distribution, has delayed the required huge investment of transmission and distribution network upgrading; Standby each other with large electrical network, power supply reliability is improved.
Distributed power source mainly comprises all kinds of renewable energy systems (wind energy, solar energy, biomass energy etc.), and the characteristics of its clean environment firendly have met the requirement of low-carbon economy development.Yet, independent distributed power source access electrical network is because the characteristics such as intermittence, fluctuation, randomness of himself have been brought certain impact to electrical network, trend, failure mechanism characteristic that not only causes electrical network etc. is more complicated, and because its Ability of Resisting Disturbance is poor, abandon light, to abandon the wind phenomenon very serious, cause the distributed power source annual utilization hours to descend, affected the economy of distributed power source investment.
For coordinating the contradiction between large electrical network and distributed power source, fully excavating distributed power source is value and the benefit that electrical network and user bring, propose and development the concept of micro-electrical network (Microgrid).U.S. electric reliability engineering measure solution federation is defined as follows microgrid: microgrid is a kind of system jointly be comprised of load and micro power, and it can provide electric energy and heat simultaneously; The power supply of microgrid inside is mainly to be responsible for power conversion by power electronic equipment, and necessary control is provided; The relatively outside large electrical network of microgrid shows as single controllable, meets simultaneously the requirement of user to the quality of power supply and power supply reliability, fail safe.European Union's microgrid project is defined as follows microgrid: utilize primary energy, use the minisize distributed type electricity generation system, be divided into uncontrollable, part is controlled and complete controlled 3 types, and can hot and cold, electric three alliances; Is furnished with energy storage device; Use power electronic equipment to carry out power conversion and control.In a word, microgrid has independent, flexible, mutual, economic feature, is a kind of brand-new supply power mode, is also one of main development direction of following electrical network.
Therefore provide a kind of microgrid coordinated control system of distributed power source of the typical microgrid operating structure based on multiple distributed power source composition to seem very important.
Summary of the invention
In order to meet the needs of prior art, the utility model provides a kind of microgrid coordinated control system, and described microgrid coordinated control system comprises the microgrid tuning controller be connected with the distributed electrical source terminal by Ethernet; Described microgrid tuning controller is connected with intelligent electric energy meter with microgrid protection measure and control device by Ethernet respectively;
The described distributed electrical source terminal of described microgrid tuning controller Real-Time Monitoring, and to described distributed electrical source terminal and described microgrid, protect the measure and control device sending controling instruction according to the distributed power source monitoring information, realize microgrid optimization operation.
Preferably, described intelligent electric energy meter is connected with described microgrid tuning controller by after communication interface RS485 access concentrator;
Preferably, described microgrid tuning controller comprises digital quantity input module, digital output module, analog measurement module, Ethernet expansion module, power module and the human-computer interface module be connected with the CPU module; Described CPU module is for carrying out logic control, communication protocol processing and configuration management to described microgrid coordinated control system;
Preferably, described distributed electrical source terminal comprises wind power generation terminal, photovoltaic generation terminal, fuel cell power generation terminal, energy storage terminal and V2G terminal; Described distributed electrical source terminal sends to described microgrid tuning controller by the operating state signal of the distributed power source of collection, voltage signal, current signal and power signal, and receives the described control command that described microgrid tuning controller issues; Described control command comprises to the throwing of photovoltaic DC-to-AC converter, blower fan inverter, energy storage PCS, fuel cell PCS and V2G current transformer PCS transmission moves back control command and power control instruction; Described operating state signal comprise grid-connected status signal, also/from net switching state signal, from the net state signal and from/four kinds of operating state signals of grid-connected switching state signal;
Preferably, described microgrid protection measure and control device comprises overcurrent protection unit, overvoltage protective unit, overfrequency protected location, under voltage protection unit, under frequency protection unit, asynchronous switch-on protected location, reverse power protection unit, breaker remote unit and circuit breaker remote signalling control unit.
The beneficial effects of the utility model are:
1, in technical solutions of the utility model, the energy storage terminal has improved the stability when micro-grid system moves, and realizes the seamless switching of important load;
2, in technical solutions of the utility model, human-computer interface module comprises the input of big screen LCD and touch-screen, and the operation that makes the microgrid tuning controller is simple and fast more;
3, in technical solutions of the utility model, adopt Ethernet as communication mode, possess the advantage that opening is good, transmission rate is high, cost is cheap;
4, a kind of microgrid coordinated control system of providing of the utility model, realize that the operation of the multiple distributed power source microgrid of access is non-maintaining and practical.
The accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further illustrated.
Fig. 1 is: a kind of microgrid coordinated control system structural representation that the utility model provides;
Fig. 2 is: a kind of microgrid coordinated control system connection layout that the utility model provides;
Fig. 3 is: microgrid tuning controller structural representation.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is clearly and completely described.
Fig. 1 and Fig. 2 show a kind of microgrid coordinated control system structure chart provided by the invention; Distributed electrical source terminal, microgrid protection measure and control device are connected with described microgrid tuning controller by Ethernet respectively with intelligent electric energy meter; Microgrid tuning controller Real-Time Monitoring distributed electrical source terminal, and to distributed electrical source terminal and microgrid, protect the measure and control device sending controling instruction according to the distributed power source monitoring information, realize microgrid optimization operation;
The distributed electrical source terminal comprises wind power generation terminal, photovoltaic generation terminal, fuel cell power generation terminal, energy storage terminal and V2G terminal; The execution instruction comprises to the throwing of photovoltaic DC-to-AC converter, blower fan inverter, energy storage PCS, fuel cell PCS and V2G current transformer PCS transmission moves back control command and power control instruction; The distributed electrical source terminal sends to the microgrid tuning controller by the operating state signal of the distributed power source of collection, voltage signal, current signal and power signal, and receives the control command that the microgrid tuning controller issues; Operating state signal comprise grid-connected status signal, also/from net switching state signal, from the net state signal and from/four kinds of operating state signals of grid-connected switching state signal;
Intelligent electric energy meter is connected with described microgrid tuning controller by after communication interface RS485 access concentrator, realizes stoichiometric point electric energy metrical function; Described microgrid protection measure and control device comprises overcurrent protection unit, overvoltage protective unit, overfrequency protected location, under voltage protection unit, under frequency protection unit, asynchronous switch-on protected location, reverse power protection unit, breaker remote unit and circuit breaker remote signalling control unit; Described overcurrent protection unit, overvoltage protective unit, overfrequency protected location, under voltage protection unit, under frequency protection unit, asynchronous switch-on protected location and reverse power protection unit carry out overcurrent protection, overvoltage protection, overfrequency protection, under voltage protection, under frequency protection, asynchronous switch-on protection and reverse power protection to the distributed electrical source terminal respectively;
Fig. 3 shows microgrid tuning controller structural representation; The microgrid tuning controller comprises digital quantity input module, digital output module, analog measurement module, Ethernet expansion module, power module and the human-computer interface module be connected with the CPU module; The CPU module is for carrying out logic control, communication protocol processing and configuration management to the microgrid coordinated control system; The Ethernet expansion module is realized the Ethernet Interface Expanding, for realizing the communication system access based on Ethernet, realizes the information interaction of microgrid tuning controller and distributed electrical source terminal or intelligent electric energy meter; Human-computer interface module comprises big screen LCD and touch-screen input, can observe operation conditions and the service data of microgrid coordinated control system, carries out the parameter setting, and can show in real time the microgrid running status.
The specific embodiment of microgrid coordinated control system provided by the invention is as follows:
The distributed electrical source terminal comprises the V2G apparatus control system of 189kW photovoltaic generating system, 6kW wind generator system, 10kW fuel cell generation, 1 cover 100kW battery energy storage system, 30kW; The microgrid load comprises by lighting load, machine room load and air conditioner cold-heat load etc. and forming, the about 1000kVA of total load capacity; Photovoltaic generating system is comprised of 1 125kW three-phase grid-connected inverter, 2 30kW three-phase inverters and 1 4kW three-phase inverter; Wind generator system is comprised of 6 1kW single-phase grid-connected inverters; , fuel cell generation is comprised of 1 10kW three-phase grid-connected inverter;
The microgrid coordinated control system adopts the master-slave control strategy pattern; 1.: during from network operation, battery energy storage system is microgrid operation main power source, adopts VF operational mode (Volt Frequency), and other distributed power source is from power supply, adopts the PQ operational mode; Fuel cell generation provides electric energy to load; Photovoltaic system and wind generator system, normally move according to the voltage/frequency reference value that battery energy storage system provides; Under the network operation mode, adopt the Vehicular battery power supply cost higher, so the V2G apparatus control system is not participated in the off-grid system power adjustments;
2.: from network operation, be converted to while being incorporated into the power networks, the microgrid tuning controller is followed the tracks of major network voltage and microgrid voltage, realizes dropping into the same period; Main power source (100kW battery energy storage system) is according to the grid-connected switch P CC(Point of Common Coupling of microgrid and electrical network) the state running mode switching; After being the PCC closure, main power source switches to the PQ operational mode immediately according to the PCC state;
3.: while being incorporated into the power networks, electrical network provides the voltage/frequency reference value, and other distributed power sources adopt the PQ operational mode; Fuel cell generation is not worked, when being in an emergency as the power support;
4.: be incorporated into the power networks while being converted to from network operation, but the microgrid tuning controller receives from the backward controllable burden of net switching signal and cutting load and sends out trip command, itself and microgrid are disconnected, main power source (100kW battery energy storage system) adopts the VF operational mode simultaneously, set up voltage and the frequency reference value of micro-grid system, then carry out distributed power source output adjusting, switching load, realize the sensitive load uninterrupted power supply, realize that finally electric voltage frequency is stabilized in rational scope.
Finally should be noted that: described embodiment is only the application's part embodiment, rather than whole embodiment.Based on the embodiment in the application, those of ordinary skills are not making under the creative work prerequisite the every other embodiment obtained, and all belong to the scope of the application's protection.
Claims (5)
1. microgrid coordinated control system, described microgrid coordinated control system comprises the microgrid tuning controller be connected with the distributed electrical source terminal by Ethernet, it is characterized in that, described microgrid tuning controller is connected with intelligent electric energy meter with microgrid protection measure and control device by Ethernet respectively;
The described distributed electrical source terminal of described microgrid tuning controller Real-Time Monitoring, and to described distributed electrical source terminal and described microgrid, protect the measure and control device sending controling instruction according to the distributed power source monitoring information, realize microgrid optimization operation.
2. a kind of microgrid coordinated control system as claimed in claim 1, is characterized in that, described intelligent electric energy meter is connected with described microgrid tuning controller by after communication interface RS485 access concentrator.
3. a kind of microgrid coordinated control system as claimed in claim 1, it is characterized in that, described microgrid tuning controller comprises digital quantity input module, digital output module, analog measurement module, Ethernet expansion module, power module and the human-computer interface module be connected with the CPU module; Described CPU module is for carrying out logic control, communication protocol processing and configuration management to described microgrid coordinated control system.
4. a kind of microgrid coordinated control system as claimed in claim 1, is characterized in that, described distributed electrical source terminal comprises wind power generation terminal, photovoltaic generation terminal, fuel cell power generation terminal, energy storage terminal and V2G terminal; Described distributed electrical source terminal sends to described microgrid tuning controller by the operating state signal of the distributed power source of collection, voltage signal, current signal and power signal, and receives the described control command that described microgrid tuning controller issues; Described control command comprises to the throwing of photovoltaic DC-to-AC converter, blower fan inverter, energy storage PCS, fuel cell PCS and V2G current transformer PCS transmission moves back control command and power control instruction; Described operating state signal comprise grid-connected status signal, also/from net switching state signal, from the net state signal and from/four kinds of operating state signals of grid-connected switching state signal.
5. a kind of microgrid coordinated control system as claimed in claim 1; it is characterized in that, described microgrid protection measure and control device comprises overcurrent protection unit, overvoltage protective unit, overfrequency protected location, under voltage protection unit, under frequency protection unit, asynchronous switch-on protected location, reverse power protection unit, breaker remote unit and circuit breaker remote signalling control unit.
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| CN2013202868912U CN203312828U (en) | 2013-05-23 | 2013-05-23 | Microgrid coordinated control system |
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| CN2013202868912U CN203312828U (en) | 2013-05-23 | 2013-05-23 | Microgrid coordinated control system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105098782A (en) * | 2014-12-24 | 2015-11-25 | 上海电气集团股份有限公司 | Intelligent micro-grid switching and protection device and system |
| CN105337302A (en) * | 2014-08-12 | 2016-02-17 | 国家电网公司 | Control method and apparatus for microgrid |
| CN108233361A (en) * | 2017-12-18 | 2018-06-29 | 中国电建集团福建省电力勘测设计院有限公司 | Towards the synthesis energy supplying system layering and zoning cooperative control method of garden microgrid |
| CN111030182A (en) * | 2019-12-27 | 2020-04-17 | 郑州众智科技股份有限公司 | Micro-grid electric energy monitoring system |
-
2013
- 2013-05-23 CN CN2013202868912U patent/CN203312828U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105337302A (en) * | 2014-08-12 | 2016-02-17 | 国家电网公司 | Control method and apparatus for microgrid |
| CN105098782A (en) * | 2014-12-24 | 2015-11-25 | 上海电气集团股份有限公司 | Intelligent micro-grid switching and protection device and system |
| CN108233361A (en) * | 2017-12-18 | 2018-06-29 | 中国电建集团福建省电力勘测设计院有限公司 | Towards the synthesis energy supplying system layering and zoning cooperative control method of garden microgrid |
| CN111030182A (en) * | 2019-12-27 | 2020-04-17 | 郑州众智科技股份有限公司 | Micro-grid electric energy monitoring system |
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