CN201654170U - Comprehensive micro net experimental system - Google Patents
Comprehensive micro net experimental system Download PDFInfo
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- CN201654170U CN201654170U CN2010201735407U CN201020173540U CN201654170U CN 201654170 U CN201654170 U CN 201654170U CN 2010201735407 U CN2010201735407 U CN 2010201735407U CN 201020173540 U CN201020173540 U CN 201020173540U CN 201654170 U CN201654170 U CN 201654170U
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Abstract
The utility model discloses a comprehensive micro net experimental system with flexible structure. At present, a comprehensive micro net experimental system which finishes building by self does not exist in china. The technical solution is that the comprehensive micro net experimental system comprises a micro net A and a micro net B, and is characterized in that the micro net A is connected with an external net through a parallel net switch M1, the micro net B is connected with the external net through a parallel net switch M2, and an interconnection switch L1 is arranged between a bus LM5 and a LM 8. When the interconnection switch L1 is opened, the micro net A and the micro net B respectively operate, the interconnection switch L1 is closed and is matched with relative opening-closing states, the micro net A and the micro net B are connected into a big micro net to operate, and the big micro net is connected with the external net through the parallel net switch M1. The parallel net switch M1, the parallel net switch M2, a two-way inverter and a diesel generator are controlled through a mode controller. The comprehensive micro net experimental system can independently operate in various small micro nets, also can be combined into a big micro net to operate, and can achieve flexible switching of parallel net and independent operating modes.
Description
Technical field
The utility model relates to the electrical network experimental system, the comprehensive flexibly microgrid experimental system of specifically a kind of structure.
Background technology
Along with development and national economy, electricity needs increases rapidly, and the electrical network scale constantly enlarges, the drawback of ultra-large electric system also shows especially day by day, the cost height, the operation difficulty is big, is difficult to adapt to more and more higher safety of user and reliability requirement and diversified power demands.Especially in the world wide large area blackout is several times taking place in succession in recent years, the fragility of electrical network fully exposes.
Distributed power generation can provide traditional unrivaled reliability of electric system and economy, but also there are problems in itself, as the influence of back to big electrical network of being incorporated into the power networks.The influence of distributed power generation to big electrical network can be effectively alleviated in the proposition of microgrid technology, will become the main application form of high permeability distributed power generation.
Distributed power generation and microgrid technology are subjected to extensive concern and have obtained the active support of the government in developed country.In recent years, microgrid had obtained development faster, but also was faced with a lot of problems simultaneously.The key problem of microgrid research is how to guarantee how to keep transient stability after the steady-state operation of microgrid and microgrid are disturbed, i.e. the control strategy problem of microgrid.The construction of microgrid experimental system as the realization carrier of microgrid control strategy, can be the research of microgrid control strategy verification platform is provided, and its research to microgrid is significant.
At present, domestic do not have as yet oneself build the comprehensive microgrid experimental system finish.
The utility model content
Technical problem to be solved in the utility model is to propose the comprehensive flexibly microgrid experimental system of a kind of structure, it contains multiple distributed power source and accumulator system, possesses reliable many microgrids system architecture, both can each little microgrid isolated operation, also can form the operation of big microgrid, and the flexible switching with independent operation mode of can realizing being incorporated into the power networks.
For this reason, the technical solution adopted in the utility model is: a kind of comprehensive microgrid experimental system, comprise microgrid A and microgrid B, it is characterized in that: described microgrid A comprises three sections bus LM3, LM4, LM5, between bus, be provided with analog line, bus LM3 hangs with accumulator and two-way inverter and fictitious load, bus LM4 hangs with three-phase photovoltaic system and fictitious load, bus LM5 hangs with the double-fed wind generating simulation system, direct-drive aerogenerator grid-connected system (forming) and fictitious load by blower fan inverter and direct-drive aerogenerator, microgrid A links to each other with outer net by the switch M1 that is incorporated into the power networks, during islet operation, accumulator and two-way inverter provide the electric voltage frequency reference in the microgrid.
Described microgrid B comprises three sections bus LM7, LM8, LM9, between bus LM7 and LM8, be provided with analog line, hang with the three-phase photovoltaic system on the bus LM8, is furnished with fictitious load, hang with diesel-driven generator and flywheel energy storage system on the bus LM7, the output of flywheel energy storage system is linked bus LM9 through analog line, bus LM9 hangs with the fictitious load that is used to simulate important load, between bus LM8 and LM9, be provided with interconnection switch L2, make microgrid B that two kinds of topological structures can be arranged, microgrid B links to each other with outer net by the switch M2 that is incorporated into the power networks, during islet operation, flywheel energy storage provides power supply in short-term, and starting diesel-driven generator subsequently provides long-time microgrid interior electric voltage frequency reference.
Be provided with interconnection switch L1 between bus LM5 and LM8, when interconnection switch L1 opened, microgrid A and microgrid B moved respectively; Interconnection switch L1 closure also cooperates the related switch state, microgrid A and microgrid B are unified into a big microgrid operation, this big microgrid links to each other with outer net by the switch M1 that is incorporated into the power networks, and during islet operation, can select the two-way inverter of diesel-driven generator or accumulator to provide long microgrid interior electric voltage frequency reference.
Described be incorporated into the power networks switch M1, M2, two-way inverter and diesel-driven generator are by mode controller control.Microgrid generally includes and is incorporated into the power networks and two kinds of patterns of islet operation, and mode controller can be realized the conversion of microgrid operational mode according to external condition.The duty of two kinds of operational mode correspondences is described below:
The pattern of being incorporated into the power networks is meant that the inner microgrid of the utility model links to each other with external power grid, and external power grid provides the electric voltage frequency reference in the microgrid; The islet operation pattern is meant that inner microgrid of the utility model and external power grid disconnect the microgrid independent operating.During islet operation, accumulator and two-way inverter provide the electric voltage frequency reference in the microgrid, or flywheel energy storage provides power supply in short-term, and starting diesel-driven generator subsequently provides electric voltage frequency reference in the long-time microgrid.
The utility model is by the pattern that is incorporated into the power networks and the islet operation mode switch of the control strategy realization microgrid that is incorporated into the power networks, and promptly microgrid is incorporated into the power networks and off-grid control.
The control strategy that is incorporated into the power networks of microgrid is described below:
(1) when the outer net busbar voltage just often, prepare to be incorporated into the power networks;
(2) close down the equipment that microgrid inside provides the electric voltage frequency reference;
(3) close down distributed power source, the closure switch that is incorporated into the power networks;
(4) Intranet voltage normal after, distributed power supply system resumes operation;
(5) electrical network bringing onto load operation, inner energy storage device enters charge mode.
The off-grid control strategy of microgrid is described below:
(1) when the outer net busbar voltage is undesired, prepares off-grid;
(2) open the switch that is incorporated into the power networks;
(3) energy storage device free band part important load operation in the microgrid, other power supplys and load will be turn-offed and have a power failure in short-term;
(4) Intranet voltage normal after, distributed power supply system resumes operation;
(5) microgrid internal electric source bringing onto load operation, energy storage device enters charge mode.
Described microgrid experimental system has independent microgrid pattern and the many microgrids pattern that is incorporated into the power networks, and independent microgrid pattern is to open two interconnection switches between the microgrid, each self-operating of two microgrids; Many microgrid patterns of being incorporated into the power networks are the interconnection switches between closed two microgrids, and the interconnection switch of one of them microgrid and outer net is opened, and two microgrids are as an overall operation.
The utility model adopts the three-phase five-wire mode mode of connection, power supply one end ground connection, electric device exposes can lead part and directly link to each other with power ground point, neutral conductor and protection conductor separately, the neutral line with protect zero line to separate, effectively reduce stray current and harmonic current.
Described microgrid experimental system is furnished with supervisory system and protective device.The structure of supervisory system comprises: main website layer, coordination key-course, distribution network terminal, protection mechanical floor and microgrid key-course; The road protection of protection configuration packet vinculum, tranformer protection, terminal protection, photovoltaic, accumulator, blower fan, flywheel protection, the protection of being incorporated into the power networks, fault simulation terminal, feeder automation terminal unit, capacitor switching monitoring, fault filter etc.
The utlity model has following beneficial effect: 1) contain multiple distributed power source and accumulator system, satisfy the needs of different researchs; 2) reliable many microgrids system architecture, but each little microgrid isolated operation or as a big microgrid operation; 3) can control flexibly the microgrid operational mode; 4) the microgrid internal bus is equipped with interconnection switch, can change the topological structure of microgrid; 5) during islet operation, energy storage device can provide the electric voltage frequency reference in the microgrid; 6) sandwich construction supervisory system has good opening, security, integration, maintainability, extendability and antijamming capability; 7) protective device can the quick response system side and the fault of microgrid inside, makes the corresponding protection action, protection system and user security.
The utility model is described in further detail below in conjunction with specification drawings and specific embodiments.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the method for operation (external fault) block diagram of microgrid A in the utility model.
Fig. 3 is the method for operation (external fault) block diagram of microgrid B in the utility model.
Fig. 4 is the utility model supervisory system structural drawing.
Embodiment
Microgrid experimental system described in the utility model is made of microgrid A and microgrid B two parts as shown in fig. 1.
Microgrid A comprises LM3, LM4, three buses of LM5, is provided with analog line (100m) between bus.Bus LM3 hangs with accumulator and two-way inverter (100kW) and fictitious load (10kW+8kVar+8kVar); Bus LM4 hangs with three-phase photovoltaic system (30kWp) and fictitious load (30kW+24kVar+24kVar); Bus LM5 hangs with double-fed wind generating simulation system (30kW), 2*5kW direct-drive aerogenerator grid-connected system, fictitious load (30kW+24kVar+24kVar).Microgrid A links to each other with outer net by M1, and during islet operation, accumulator and two-way inverter provide the electric voltage frequency reference in the microgrid.
Microgrid B comprises LM7, LM8, three sections buses of LM9, is provided with analog line (100m) between LM7 and LM8; Hang with three-phase photovoltaic system (30kWp) on the LM8, be furnished with fictitious load (30kW+24kVar+24kVar).Hang with 300kVA diesel-driven generator, 250kVA flywheel energy storage system on the LM7; The output of 250kVA flywheel energy storage system is linked bus LM9 through analog line (100m); LM9 is furnished with fictitious load (60kW+45kVar+45kVar) and is used to simulate and does not allow the important load that has a power failure.
Between LM8, LM9, be provided with interconnection switch L2, make microgrid B that two kinds of topological structures can be arranged.Microgrid B links to each other with outer net by M2, and during islet operation, flywheel energy storage provides power supply in short-term, and starting diesel-driven generator subsequently provides long-time microgrid interior electric voltage frequency reference.
Between LM5, LM8, be provided with interconnection switch L1.When L1 opened, microgrid A, microgrid B can move respectively.
L1 is closed and cooperate the related switch state, microgrid A, microgrid B can be unified into a big microgrid operation.Big microgrid links to each other with outer net by M1, during islet operation, can select the two-way inverter of diesel-driven generator or accumulator to provide long microgrid interior electric voltage frequency reference.
When not carrying out the microgrid test, each distributed power source can directly be incorporated into the power networks.
The logic diagram of the method for operation (external fault) of the utility model microgrid A is shown in Fig. 2-3, and wherein Fig. 2 is a microgrid A off-grid mode, and Fig. 3 is microgrid A and net mode.The logic diagram of the method for operation of microgrid B (external fault) is shown in Fig. 4-5, and wherein Fig. 4 is a microgrid B off-grid mode, and Fig. 5 is microgrid B and net mode.
The utility model supervisory system structure is made up of main website layer, coordination key-course, distribution network terminal, protection mechanical floor and microgrid key-course as shown in Figure 6.But the construction of supervisory system is in line with principles such as opening, security integration, ease for maintenance, extensibility and antijamming capabilities.
Claims (2)
1. comprehensive microgrid experimental system, comprise microgrid A and microgrid B, it is characterized in that: described microgrid A comprises three sections bus LM3, LM4, LM5, between bus, be provided with analog line, bus LM3 hangs with accumulator and two-way inverter and fictitious load, bus LM4 hangs with three-phase photovoltaic system and fictitious load, and bus LM5 hangs with double-fed wind generating simulation system, direct-drive aerogenerator grid-connected system and fictitious load, and microgrid A links to each other with outer net by the switch M1 that is incorporated into the power networks;
Described microgrid B comprises three sections bus LM7, LM8, LM9, between bus LM7 and LM8, be provided with analog line, hang with the three-phase photovoltaic system on the bus LM8, is furnished with fictitious load, hang with diesel-driven generator and flywheel energy storage system on the bus LM7, the output of flywheel energy storage system is linked bus LM9 through analog line, and bus LM9 hangs with the fictitious load that is used to simulate important load, be provided with interconnection switch L2 between bus LM8 and LM9, microgrid B links to each other with outer net by the switch M2 that is incorporated into the power networks;
Be provided with interconnection switch L1 between bus LM5 and LM8, when interconnection switch L1 opened, microgrid A and microgrid B moved respectively; Interconnection switch L1 is closed and cooperate the related switch state, and microgrid A and microgrid B are unified into a big microgrid operation, and this big microgrid links to each other with outer net by the switch M1 that is incorporated into the power networks;
Described be incorporated into the power networks switch M1, M2, two-way inverter and diesel-driven generator are by mode controller control.
2. comprehensive microgrid experimental system according to claim 1 is characterized in that described microgrid experimental system is furnished with supervisory system and protective device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201735407U CN201654170U (en) | 2010-04-29 | 2010-04-29 | Comprehensive micro net experimental system |
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| CN2010201735407U CN201654170U (en) | 2010-04-29 | 2010-04-29 | Comprehensive micro net experimental system |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074953A (en) * | 2010-12-10 | 2011-05-25 | 天津天大求实电力新技术股份有限公司 | Double-purpose micro-grid system structure used for power supply and experiment |
| CN102185333A (en) * | 2011-04-19 | 2011-09-14 | 河南电力试验研究院 | Method for realizing on-grid and off-grid dual-mode running of dual-directional converter in micro-grid |
| CN102403736A (en) * | 2011-12-19 | 2012-04-04 | 天津市电力公司 | Method and system for switching microgrid from island mode to grid connected mode |
| CN102412594A (en) * | 2011-11-25 | 2012-04-11 | 北京金风科创风电设备有限公司 | Control Method of Microgrid System |
| CN102496956A (en) * | 2011-11-25 | 2012-06-13 | 北京金风科创风电设备有限公司 | Mode switching method for switching grid-connected mode to island mode of microgrid |
| CN102497010A (en) * | 2011-12-19 | 2012-06-13 | 天津市电力公司 | Method and system for switching microgrid from grid-connected mode to island mode |
| CN102510089A (en) * | 2011-11-25 | 2012-06-20 | 北京金风科创风电设备有限公司 | Wind-solar storage micro-grid system |
| CN102510124A (en) * | 2011-11-25 | 2012-06-20 | 北京金风科创风电设备有限公司 | Mode switching method for switching from island mode to grid-connected mode of microgrid |
| CN102510087A (en) * | 2011-11-22 | 2012-06-20 | 云南电力试验研究院（集团）有限公司电力研究院 | Micro-grid experimental system based on hybrid simulation platform |
| CN102545261A (en) * | 2012-01-16 | 2012-07-04 | 沈阳工程学院 | Micro-grid experiment system |
| CN103166249A (en) * | 2011-12-14 | 2013-06-19 | 深圳市康必达中创科技有限公司 | Safe and stable control method of quick grid-connected system |
| CN104868523A (en) * | 2014-02-26 | 2015-08-26 | 三垦电气株式会社 | Automatic operation system |
| CN105137348A (en) * | 2015-07-17 | 2015-12-09 | 国家电网公司 | Diesel generator simulator used for micro-grid |
| CN105938165A (en) * | 2016-05-22 | 2016-09-14 | 沈阳工程学院 | Local power generation and power supply experiment system comprising electric vehicle |
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2010
- 2010-04-29 CN CN2010201735407U patent/CN201654170U/en not_active Expired - Fee Related
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074953A (en) * | 2010-12-10 | 2011-05-25 | 天津天大求实电力新技术股份有限公司 | Double-purpose micro-grid system structure used for power supply and experiment |
| CN102185333A (en) * | 2011-04-19 | 2011-09-14 | 河南电力试验研究院 | Method for realizing on-grid and off-grid dual-mode running of dual-directional converter in micro-grid |
| CN102510087A (en) * | 2011-11-22 | 2012-06-20 | 云南电力试验研究院（集团）有限公司电力研究院 | Micro-grid experimental system based on hybrid simulation platform |
| CN102496956A (en) * | 2011-11-25 | 2012-06-13 | 北京金风科创风电设备有限公司 | Mode switching method for switching grid-connected mode to island mode of microgrid |
| CN102412594A (en) * | 2011-11-25 | 2012-04-11 | 北京金风科创风电设备有限公司 | Control Method of Microgrid System |
| CN102496956B (en) * | 2011-11-25 | 2014-10-22 | 北京金风科创风电设备有限公司 | Mode switching method for switching grid-connected mode to island mode of microgrid |
| CN102510089A (en) * | 2011-11-25 | 2012-06-20 | 北京金风科创风电设备有限公司 | Wind-solar storage micro-grid system |
| CN102510124A (en) * | 2011-11-25 | 2012-06-20 | 北京金风科创风电设备有限公司 | Mode switching method for switching from island mode to grid-connected mode of microgrid |
| CN102412594B (en) * | 2011-11-25 | 2013-11-27 | 北京金风科创风电设备有限公司 | Control Method of Microgrid System |
| CN103166249A (en) * | 2011-12-14 | 2013-06-19 | 深圳市康必达中创科技有限公司 | Safe and stable control method of quick grid-connected system |
| CN103166249B (en) * | 2011-12-14 | 2016-03-16 | 深圳市康必达中创科技有限公司 | A kind of rapid combination system safety stable control method |
| CN102403736A (en) * | 2011-12-19 | 2012-04-04 | 天津市电力公司 | Method and system for switching microgrid from island mode to grid connected mode |
| CN102497010A (en) * | 2011-12-19 | 2012-06-13 | 天津市电力公司 | Method and system for switching microgrid from grid-connected mode to island mode |
| CN102545261A (en) * | 2012-01-16 | 2012-07-04 | 沈阳工程学院 | Micro-grid experiment system |
| CN104868523A (en) * | 2014-02-26 | 2015-08-26 | 三垦电气株式会社 | Automatic operation system |
| CN104868523B (en) * | 2014-02-26 | 2019-03-12 | 三垦电气株式会社 | Autonomous movement system |
| CN105137348A (en) * | 2015-07-17 | 2015-12-09 | 国家电网公司 | Diesel generator simulator used for micro-grid |
| CN105137348B (en) * | 2015-07-17 | 2017-12-12 | 国家电网公司 | A kind of diesel-driven generator simulator for microgrid |
| CN105938165A (en) * | 2016-05-22 | 2016-09-14 | 沈阳工程学院 | Local power generation and power supply experiment system comprising electric vehicle |
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