CN106772045B - Micro-grid simulation variable-power asynchronous motor load experiment platform - Google Patents
Micro-grid simulation variable-power asynchronous motor load experiment platform Download PDFInfo
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- CN106772045B CN106772045B CN201611246142.1A CN201611246142A CN106772045B CN 106772045 B CN106772045 B CN 106772045B CN 201611246142 A CN201611246142 A CN 201611246142A CN 106772045 B CN106772045 B CN 106772045B
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- 238000002474 experimental method Methods 0.000 title claims abstract description 15
- 238000004088 simulation Methods 0.000 title claims abstract description 9
- 239000007858 starting material Substances 0.000 claims abstract description 12
- 230000001360 synchronised effect Effects 0.000 claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract description 7
- 230000008878 coupling Effects 0.000 claims abstract description 4
- 238000010168 coupling process Methods 0.000 claims abstract description 4
- 238000005859 coupling reaction Methods 0.000 claims abstract description 4
- 235000001674 Agaricus brunnescens Nutrition 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 10
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000001052 transient effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/058—Safety, monitoring
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/16—Plc to applications
- G05B2219/163—Domotique, domestic, home control, automation, smart, intelligent house
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Ac Motors In General (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
The invention provides a micro-grid simulation variable power asynchronous motor load experiment platform, which belongs to the technical field of motors and comprises the following steps: the motor is to dragging platform, master control cabinet and adjustable resistance value's resistance cabinet, wherein, the motor include to dragging the platform: asynchronous motor, synchronous generator and shaft coupling, the main control cabinet include: the system comprises a PLC, a touch screen, a dragging motor soft starter and an electric energy quality test instrument; on the basis of simulating no-load and load operation of an asynchronous motor, the load power is set through a PLC; the device has the advantages of simple structure, good stability and reliability, convenient use, no complex operation program of the unit, zero-torque (zero-rotation speed) soft start, complete avoidance of impact on a power grid caused by the start of the unit, solving of loading operation only by controlling a touch screen to adjust resistance, and extremely convenient use; it can maintain extremely high stability over the full range of speeds (even at zero speed) and torques.
Description
Technical Field
The invention belongs to the technical field of motors, and particularly relates to a micro-grid load experiment platform for simulating a variable-power asynchronous motor.
Background
As a novel power grid structure, the micro-grid increases the flexibility of a system network on the basis of the traditional power network. When the micro-grid operates in parallel and off-grid, the asynchronous motor is used as a conventional load of the power grid. The scale and power ratio are large. The influence of asynchronous motor load on the micro-grid parallel-grid and off-grid running state and the transient process in the seamless switching connection process is researched. The load experiment device is developed particularly. The method has the advantages that the important purpose is to research, firstly, in the mode switching process of the micro-grid parallel-grid and off-grid, the voltage and frequency of the micro-grid are influenced by the reactive power excitation of the asynchronous motor; and the other is the problem of system energy feedback of asynchronous motor loads in the microgrid to the microgrid.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a micro-grid simulation variable power asynchronous motor load experiment platform, which simulates the electromagnetic transient process of a three-phase asynchronous motor load in the switching process of the micro-grid on and off the grid, comprises the no-load process of the asynchronous motor during actual operation and the starting, running and stopping processes of the asynchronous motor during loading, and can accurately reflect the influence of the actual running process of the whole motor on the transient process of the micro-grid; the motor protection device has an excellent motor protection function, and the motor system is protected by adding a soft start device and overvoltage protection.
A little electric wire netting simulation variable power asynchronous machine load experiment platform includes: the motor is to dragging platform, master control cabinet and adjustable resistance value's resistance cabinet, wherein, the motor include to dragging the platform: asynchronous motor, synchronous generator and shaft coupling, the main control cabinet include: the system comprises a PLC, a touch screen, a dragging motor soft starter and an electric energy quality test instrument;
the PLC is connected with the touch screen through a communication interface, a plurality of output ends of the PLC are respectively connected with the input end of the dragging motor soft starter and the input end of the resistance cabinet, and the electric energy quality test instrument is connected with the main circuit of the control cabinet and respectively measures voltage and current signals;
the output end of the soft starter of the dragging motor is connected with the input end of an asynchronous motor, the asynchronous motor is connected with a synchronous generator through a coupler, and the output end of the synchronous generator is connected with a resistor cabinet.
The apparatus also includes a security system comprising: safety chain latching relay, mushroom head scram switch, PLC controller watchdog and distribution power supply.
The main control cabinet is also provided with a switch, a contactor, a relay and a low-voltage apparatus.
The resistor cabinet comprises a plurality of resistors, and the discharge power interval is set to be 1kW by combining the access resistors through the keys according to the actual power detection requirement.
The invention has the advantages that:
the invention provides a micro-grid simulation variable power asynchronous motor load experiment platform, which is used for setting the load power through a PLC (programmable logic controller) on the basis of simulating no-load and load operation of an asynchronous motor; simple structure, stability, good reliability, convenient use, no complex operation program like the unit, zero-torque (zero-rotation speed) soft start, completely avoiding the impact on the power grid like the unit start, and solving the loading operation only by controlling the touch screen to adjust the resistance, and is extremely convenient to use. It can maintain extremely high stability over the full range of speeds (even at zero speed) and torques.
Drawings
Fig. 1 is a schematic structural diagram of a microgrid load experiment platform for simulating a variable power asynchronous motor according to an embodiment of the invention;
fig. 2 is a circuit diagram of a micro-grid simulation variable power asynchronous motor load experiment platform according to the present invention.
Detailed Description
An embodiment of the present invention will be further described with reference to the accompanying drawings.
In the embodiment of the present invention, as shown in fig. 1, a microgrid analog variable power asynchronous motor load experiment platform, a motor twin-trawling platform, a master control cabinet and a resistance cabinet with an adjustable resistance value, where the motor twin-trawling platform includes: asynchronous motor, synchronous generator and shaft coupling, the main control cabinet include: the system comprises a PLC, a touch screen, a dragging motor soft starter and an electric energy quality test instrument;
in the embodiment of the invention, the soft starter of the dragging motor adopts a JJ1000 model, is used for starting a squirrel-cage asynchronous motor, and can limit starting current and reduce voltage for starting; reducing the impact of starting current on a power grid; the vibration and noise of the equipment are reduced, and the service life of mechanical transmission is prolonged;
in the embodiment of the invention, the asynchronous motor adopts a Y2-180M-2 type dragging motor and is used for dragging a 20kW adjustable load; the addition of the soft start device can reduce the current impact caused by frequent start; after the three-phase asynchronous motor is completely started and after the bypass is softly started, a three-phase asynchronous motor feedback electric energy experiment of micro-grid power-on, power-off and grid-connected and off-grid switching can be carried out;
in the embodiment of the invention, the synchronous generator adopts the synchronous generator set, the performance is stable, the operation is reliable, and the maintenance amount is small;
in the embodiment of the invention, the resistor cabinet comprises a plurality of stainless steel resistors. The power of the resistor under the rated voltage is 1kW, 2kW, 5kW and 10kW respectively. Any power of 1-20 kW can be realized by different combinations, and the minimum resolution is 1 kW;
in the embodiment of the invention, the main control cabinet is provided with: a switch, a contactor, a relay, a low-voltage apparatus, a cabinet heater and illumination; the panel is arranged: instruments, switches, buttons, indicator lights and emergency stop buttons;
in the embodiment of the invention, the PLC adopts Siemens S7-1200 series PLC, is used for controlling the start and stop of a dragging motor, and starts the motor to a rated rotating speed by using a soft starting device; adjusting the rated power of the load, namely adjusting the power of the load by using a controllable resistance box;
in the embodiment of the invention, a main circuit power supply is three-phase 380V alternating current and is taken from a micro-grid and used for driving an asynchronous motor; the load size of the asynchronous motor is determined by the load resistance of the synchronous motor; the control power supply of the main control cabinet is 220V alternating current and is taken from the power distribution cabinet to supply power for the control system and the UPS; the PLC and the control circuit take power through the UPS, and can continuously and stably work in the process of power failure of the microgrid;
in the embodiment of the invention, the PLC is connected with the touch screen through a communication interface, a plurality of output ends of the PLC are respectively connected with the input end of a soft starter of a dragging motor and the input end of a resistance cabinet, and an electric energy quality measuring instrument is connected with a main circuit of a control cabinet and is used for respectively measuring a measuring voltage signal and a measuring current signal; fig. 2 is a schematic circuit diagram of the adjustable power load motor drag test platform according to the present invention;
in an embodiment of the present invention, the apparatus further includes a security system, including: the safety chain self-locking relay, the mushroom head emergency stop switch, the PLC controller watchdog and the power distribution power supply; the safety system is a link formed by connecting elements in series, the safety system is independently controlled and is not restricted by a unit control system, when the unit is activated by pressing down in an emergency stop, the relay cuts off the safety chain self-locking relay, and at the moment, the main power supply of the unit is cut off and needs to be reset by an operator; the unit safety system mainly has the functions: the system is ensured to be in a safe state, and the unit cannot be damaged due to foreseeable faults; the safety system action unit enters an emergency shutdown program, the emergency shutdown program triggers the dragging simulation motor to stop, and the power generation system carries out braking shutdown;
in the embodiment of the present invention, the security system is hierarchical, and generally divided into 2 levels: a primary security system and a secondary security system;
A. secondary security system
The action of the secondary safety system (namely the action of a safety chain self-locking relay triggers the secondary safety system) triggers a quick stop control program; the secondary safety system comprises overheating, power grid overvoltage and undervoltage protection;
B. primary security system
The primary safety system acts (namely the mushroom head emergency stop button acts to trigger the primary safety system) to trigger an emergency stop program; the functions are as follows: and the first-level safety system action unit enters an emergency shutdown program.
Claims (2)
1. The utility model provides a little electric wire netting simulation variable power asynchronous machine load experiment platform which characterized in that includes: the motor is to dragging platform, master control cabinet and adjustable resistance value's resistance cabinet, wherein, the motor include to dragging the platform: asynchronous motor, synchronous generator and shaft coupling, the main control cabinet include: the system comprises a PLC, a touch screen, a dragging motor soft starter and an electric energy quality test instrument;
the PLC is connected with the touch screen through a communication interface, a plurality of output ends of the PLC are respectively connected with the input end of the dragging motor soft starter and the input end of the resistance cabinet, and the electric energy quality test instrument is connected with the main control cabinet circuit and respectively measures voltage and current signals;
the output end of the soft starter of the dragging motor is connected with the input end of an asynchronous motor, the asynchronous motor is mechanically connected with a synchronous generator through a coupler, and the output end of the synchronous generator is connected with a resistor cabinet;
the resistor cabinet comprises a plurality of resistors, the resistors are connected through key combination according to actual power detection requirements, and the discharge power interval is set to be 1 kW;
the power supply of the main circuit is taken from a micro-grid and is used for driving an asynchronous motor; the PLC controller starts the asynchronous motor to a rated rotating speed by using the dragging motor soft starter to complete soft start, and after the dragging motor soft starter bypasses, a feedback electric energy experiment of micro-grid power-on, power-off and parallel switching is carried out.
2. The microgrid analog variable power asynchronous motor load experiment platform of claim 1, further comprising a safety system comprising: safety chain latching relay, mushroom head scram switch, PLC controller watchdog and distribution power supply.
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| CN201611246142.1A CN106772045B (en) | 2016-12-29 | 2016-12-29 | Micro-grid simulation variable-power asynchronous motor load experiment platform |
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| CN201611246142.1A CN106772045B (en) | 2016-12-29 | 2016-12-29 | Micro-grid simulation variable-power asynchronous motor load experiment platform |
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| CN106772045B true CN106772045B (en) | 2020-04-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107390071A (en) * | 2017-08-21 | 2017-11-24 | 上海交通大学 | The simulation system of current-responsive type three-phase permanent magnet synchronous motor |
| CN109581217A (en) * | 2017-09-28 | 2019-04-05 | 株洲变流技术国家工程研究中心有限公司 | A kind of pilot system of permanent magnet coupling speed regulator |
| CN107645253A (en) * | 2017-10-23 | 2018-01-30 | 上海交通大学 | The three-phase simulation device of current-responsive type permagnetic synchronous motor and its drive system |
| CN108919115B (en) * | 2018-05-15 | 2020-10-23 | 中国航发湖南动力机械研究所 | Adjustable resistance load, loading system and loading method |
| CN110223579A (en) * | 2019-06-26 | 2019-09-10 | 商飞信息科技（上海）有限公司 | One kind to drag DC servo motor control simulated teaching platform |
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| KR100976333B1 (en) * | 2008-07-25 | 2010-08-16 | 엘에스산전 주식회사 | System and method for controlling power demand using power line communication switch |
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| CN203204895U (en) * | 2012-12-19 | 2013-09-18 | 沈阳工业大学 | Moving die bidirectional wind power energy conversion experiment platform based on double-fed generator |
| CN104242762A (en) * | 2014-10-14 | 2014-12-24 | 内蒙古科技大学 | Double-fed wind power generator frequency closed-loop control experiment device and control method |
| CN104597893A (en) * | 2014-12-23 | 2015-05-06 | 国电南瑞科技股份有限公司 | Electric variable pitch testing system and method applicable to megawatt wind turbine generator |
| CN105093045A (en) * | 2015-09-14 | 2015-11-25 | 哈尔滨工程大学 | Wind-solar-diesel-accumulator hybrid ship micro-grid system test platform |
| CN205428351U (en) * | 2015-12-07 | 2016-08-03 | 福建恒惠德信息科技有限公司 | Little electric wire netting energy storage of intelligence and load simulation platform |
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| KR100976333B1 (en) * | 2008-07-25 | 2010-08-16 | 엘에스산전 주식회사 | System and method for controlling power demand using power line communication switch |
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Inventor after: Zhang Fei Inventor after: Wang Jinming Inventor after: Li Size Inventor after: Liu Piliang Inventor after: Ren Xiaoying Inventor before: Zhang Fei Inventor before: Liu Piliang Inventor before: Li Size Inventor before: Ren Xiaoying Inventor before: Wang Jinming |
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Effective date of registration: 20240112 Address after: Room 207, Zone A, Experimental Building 2, Inner Mongolia University of Science and Technology, No. 7 Alding Street, Kundulun District, Baotou City, Inner Mongolia Autonomous Region, 014010 Patentee after: Inner Mongolia Erqi Technology Co.,Ltd. Address before: 014010 No. 7 Arden street, Baotou, the Inner Mongolia Autonomous Region Patentee before: INNER MONGOLIA University OF SCIENCE AND TECHNOLOGY |