CN103487753A - Method and test bed for testing dynamic performance of wind generating set - Google Patents
Method and test bed for testing dynamic performance of wind generating set Download PDFInfo
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- CN103487753A CN103487753A CN201210192019.1A CN201210192019A CN103487753A CN 103487753 A CN103487753 A CN 103487753A CN 201210192019 A CN201210192019 A CN 201210192019A CN 103487753 A CN103487753 A CN 103487753A
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Abstract
The invention discloses a method and test bed for testing dynamic performance of a wind generating set, and relates to the technical field of wind power generation. The method comprises the steps that when an asynchronous motor is started, the working mode of the asynchronous motor is adjusted into the asynchronous motor mode, and the control mode of a double-fed frequency converter is adjusted into a V/F control mode suitable for the asynchronous motor mode; the double-fed frequency converter controls the operation of the asynchronous motor in the V/F control mode, and after the revolving speed of the asynchronous motor reaches the revolving speed allowed by the double-fed mode grid connection, the working mode of the asynchronous motor is adjusted into the double-fed mode, and the control mode of the double-fed frequency converter is adjusted to the vector control mode suitable for the double-fed mode; the double-fed frequency converter controls the operation of the asynchronous motor in the vector control mode to enable the asynchronous motor to drive a wind generating set to be detected to operate, and after the revolving speed of the wind generating set to be detected reaches the revolving speed allowed by the wind generating set grid connection, the wind generating set to be detected is connected to a grid so that the dynamic performance of the wind generating set to be detected can be detected conveniently.
Description
Technical field
The present invention relates to technical field of wind power generation, particularly a kind of method and testing table of testing wind power generation unit dynamic property.
Background technology
The testing table of testing wind power generation unit dynamic property is the visual plant that detects the wind power generating set dynamic property.After the wind power generating set of dispatching from the factory completes static debugging, need to proceed dynamic debugging, thereby obtain the dynamic operation performance of wind power generating set.When running into abnormal conditions, such as can not be grid-connected, during the problem such as unit can not completely be sent out, powertrace does not meet the demands, overhaul in time or change relevant device, in order to carry out related commissioning and maintenance.
At present, the testing table for testing wind power generation unit dynamic property of building in industry mainly contains following three kinds, has been widely used in wind-powered electricity generation complete machine unit manufacturer.
1, the testing table of described testing wind power generation unit dynamic property comprises a total power frequency converter, an asynchronous motors, a gear case, as shown in Figure 1, it uses total power Frequency Converter Control asynchronous machine to rotate, then reaches the effect of simulation wheel hub by the gear case reduction of speed.In this scheme, all energy demand total power frequency converters of asynchronous machine consumption provide, so the capacity of total power frequency converter is very large, the overall cost of building testing table will be very high.
2, the testing table of described testing wind power generation unit dynamic property comprises a total power frequency converter, a low-speed permanent-magnet motor, and as shown in Figure 2, its use total power Frequency Converter Control permanent magnet motor slowly runs and reaches the effect of simulation wheel hub.In this scheme, the cost of permanent magnet motor is high, and all energy demand total power frequency converters of permanent magnet motor consumption provide, so the capacity of total power frequency converter is very large, the overall cost of building testing table will be very high.
3, the testing table of described testing wind power generation unit dynamic property comprises a double-fed frequency converter, a double fed asynchronous machine, a gear case, a small electromotor, and as shown in Figure 3, it uses double-fed frequency converter to control the double fed asynchronous machine operation.At first small electromotor starts, the double fed asynchronous machine rotation of motoring ring test platform, after rotating speed reaches certain value, double-fed frequency converter is started working, the operation of control double fed asynchronous machine, the high rotating speed of described double fed asynchronous machine reaches the effect of simulation wheel hub again by the gear case reduction of speed.In this scheme, double-fed frequency converter is used vector control mode to drive double fed asynchronous machine, and therefore, double fed asynchronous machine needs small electromotor to drag when the slow-speed of revolution.Complex structure so not only, the overall cost of building testing table also will be very high.
Summary of the invention
The object of the present invention is to provide a kind of method and testing table of testing wind power generation unit dynamic property, can solve better test platform structure complexity and the high problem of cost.
According to an aspect of the present invention, provide a kind of method of testing wind power generation unit dynamic property, having comprised:
A) when asynchronous machine starts, the mode of operation of asynchronous machine is adjusted into to the asynchronous motor pattern, the control mode of double-fed frequency converter is adjusted into to the voltage V/ frequency F control mode that is suitable for the asynchronous motor pattern;
B) double-fed frequency converter is controlled the asynchronous machine operation with described V/F control mode, after the rotating speed of described asynchronous machine reaches the grid-connected permission rotating speed of double-fed pattern, the mode of operation of asynchronous machine is adjusted into to the double-fed pattern, the control mode of double-fed frequency converter is adjusted into to the vector control mode that is suitable for the double-fed pattern;
C) double-fed frequency converter is controlled the asynchronous machine operation with described vector control mode, make described asynchronous machine drive wind power generating set operation to be measured, after the rotating speed of described wind power generating set to be measured reaches wind power generation set grid-connection permission rotating speed, by wind power generation set grid-connection to be measured, in order to test the dynamic property of wind power generating set to be measured.
Preferably, in described steps A) in, by closed stator short-circuiting device, the mode of operation of asynchronous machine is adjusted into to described asynchronous motor pattern.
Preferably, described step B) comprising:
To connect the net side contactor closure of industrial electrical network, and start successively double-fed frequency converter net side frequency converter, closing machine side contactor, start the pusher side frequency converter of double-fed frequency converter, make double-fed frequency converter control the asynchronous machine operation with the V/F control mode;
Described asynchronous machine moves under described asynchronous motor pattern, after its rotating speed reaches the grid-connected permission rotating speed of double-fed pattern, close described pusher side frequency converter, and disconnect described pusher side contactor, the control mode of double-fed frequency converter is adjusted into to the vector control mode that is suitable for the double-fed pattern.
Preferably, by disconnecting the stator short-circuiting device, the mode of operation of asynchronous machine is adjusted into to described double-fed pattern.
Preferably, described step C) comprising:
The closing machine side contactor, start the pusher side frequency converter successively, and closed stator contactor makes double-fed frequency converter control the asynchronous machine operation with described vector control mode;
Described asynchronous machine moves under the double-fed pattern, the rotating speed of its output drives wind power generating set operation to be measured after via the gear case reduction of speed, and after the rotating speed of described wind power generating set to be measured reaches wind power generation set grid-connection permission rotating speed, by wind power generation set grid-connection to be measured, in order to test the dynamic property of wind power generating set to be measured.
Preferably, given by torque and the power factor of the rotating speed of adjusting the testing table asynchronous machine, wind power generating set to be measured, test the dynamic property of wind power generating set to be measured.
According to a further aspect in the invention, provide a kind of testing table of testing wind power generation unit dynamic property, having comprised:
Adjusting gear, for when asynchronous machine starts, the mode of operation of asynchronous machine is adjusted into to the asynchronous motor pattern, the control mode of double-fed frequency converter is adjusted into to the V/F control mode that is suitable for described asynchronous motor pattern, after described asynchronous machine reaches the grid-connected permission rotating speed of double-fed pattern, the mode of operation of asynchronous machine is adjusted into to the double-fed pattern, the control mode of double-fed frequency converter is adjusted into to the vector control mode that is suitable for the double-fed pattern;
Double-fed frequency converter, for controlling the asynchronous machine operation with V/F control mode or vector control mode;
Asynchronous machine, for after making its rotating speed reach the grid-connected permission rotating speed of double-fed pattern under the V/F of described double-fed frequency converter control mode, drive wind power generating set operation to be measured under the vector control mode of described double-fed frequency converter, allow rotating speed in order to make the rotating speed of described wind power generating set to be measured reach wind power generation set grid-connection, by wind power generation set grid-connection to be measured, and test the dynamic property of wind power generating set to be measured.
Preferably, described adjusting gear comprises:
The stator short-circuiting device, for when the closure, make described asynchronous machine in the asynchronous motor pattern, when disconnecting, makes described asynchronous machine in the double-fed pattern.
Preferably, described regulating device also comprises:
The pusher side contactor disconnects for reach the grid-connected permission rotating speed of double-fed pattern at described asynchronous machine after, and again closed after the control mode of the mode of operation of adjusting described asynchronous machine and described double-fed frequency converter.
Compared with prior art, beneficial effect of the present invention is:
The invention provides a kind of method and testing table of testing wind power generation unit dynamic property, structure that can the Optimum Experiment platform, reduce the cost of building testing table.
The accompanying drawing explanation
Fig. 1 is the topology diagram of the total power transducer drive asynchronous machine type testing table that provides of prior art;
Fig. 2 is the topology diagram of the total power transducer drive synchronous electric type testing table that provides of prior art;
Fig. 3 is the topology diagram that the double-fed frequency converter that provides of prior art drives asynchronous machine type testing table;
Fig. 4 is the method flow diagram of the testing wind power generation unit dynamic property that provides of the embodiment of the present invention;
Fig. 5 is the topology diagram of the testing table of the testing wind power generation unit dynamic property that provides of the embodiment of the present invention;
Fig. 6 is the control system that the embodiment of the present invention provides testing table.
Embodiment
To a preferred embodiment of the present invention will be described in detail, should be appreciated that following illustrated preferred embodiment, only for description and interpretation the present invention, is not intended to limit the present invention below in conjunction with accompanying drawing.
Fig. 4 is the method flow diagram of the testing wind power generation unit dynamic property that provides of the embodiment of the present invention, as shown in Figure 4, comprising:
Step S401, when asynchronous machine starts, by closed stator short-circuiting device, the mode of operation of asynchronous machine is adjusted into to the asynchronous motor pattern, and the control mode of double-fed frequency converter is adjusted into to the V/F control mode that is suitable for described asynchronous motor pattern.
Step S402, double-fed frequency converter are controlled the asynchronous machine operation with described V/F control mode, after the rotating speed of described asynchronous machine reaches the grid-connected permission rotating speed of double-fed pattern, the mode of operation of asynchronous machine is adjusted into to the double-fed pattern, the control mode of double-fed frequency converter is adjusted into to the vector control mode that is suitable for described double-fed pattern.Specifically, at first, will connect the net side contactor closure of industrial electrical network, the pusher side frequency converter of the net side frequency converter of startup double-fed frequency converter, closing machine side contactor, startup double-fed frequency converter, make double-fed frequency converter control the asynchronous machine operation with the V/F control mode.Then, described asynchronous machine moves under the asynchronous motor pattern of described V/F control mode being suitable for, after its rotating speed reaches the grid-connected permission rotating speed of double-fed pattern, close described pusher side frequency converter, disconnect described pusher side contactor, by disconnecting the stator short-circuiting device, the mode of operation of asynchronous machine is adjusted into to the double-fed pattern, and the control mode of double-fed frequency converter is adjusted into to the vector control mode that is suitable for the double-fed pattern.
Step S403, double-fed frequency converter are controlled the asynchronous machine operation with described vector control mode, make described asynchronous machine drive wind power generating set operation to be measured, after the rotating speed of described wind power generating set to be measured reaches wind power generation set grid-connection permission rotating speed, by wind power generation set grid-connection to be measured, in order to test the dynamic property of wind power generating set to be measured.Specifically, at first, the closing machine side contactor, start the pusher side frequency converter, and closed stator contactor makes double-fed frequency converter control the asynchronous machine operation with the vector control mode that is suitable for the double-fed pattern.Then, described asynchronous machine moves under the double-fed pattern, the rotating speed of its output drives wind power generating set operation to be measured after via the gear case reduction of speed, and after the rotating speed of described wind power generating set to be measured reaches wind power generation set grid-connection and allows rotating speed, by wind power generation set grid-connection to be measured.After wind power generation set grid-connection to be measured, the rotating speed by adjusting asynchronous machine and torque, the power factor of wind power generating set to be measured are given, just can complete the test of wind power generating set dynamic property to be measured.
That is to say, the present invention utilizes double-fed frequency converter to drive powerful asynchronous machine, and the rotating speed of asynchronous machine drags wind power generating set and carries out dynamic loading test after the gear case reduction of speed.Because load in the asynchronous machine start-up course of testing table is lower, so, according to the asynchronous motor pattern, carry out the wiring of asynchronous machine stator winding.Double-fed frequency converter is used the V/F control mode to start asynchronous machine, after the rotating speed of asynchronous machine reaches the grid-connected permission rotating speed of double-fed pattern, by changing the stator winding mode of connection of asynchronous machine, the mode of operation of asynchronous machine is switched to the double-fed pattern from the asynchronous motor pattern.Then, double-fed frequency converter is used vector control mode to control the asynchronous machine operation, and asynchronous machine drives wind power generating set operation to be measured under the double-fed pattern, makes the rotating speed of wind power generating set to be measured reach wind power generation set grid-connection permission rotating speed.Embodiment provided by the invention is not changing in the rated power situation of double-fed frequency converter, has greatly improved the load capacity of asynchronous machine.
Further, above-mentioned asynchronous machine is double-fed asynchronous motor, and it changes the stator winding mode of connection of asynchronous machine by closed or disconnection stator short-circuiting device, thereby changes the mode of operation of asynchronous machine.
The present invention also provides a kind of testing table of testing wind power generation unit dynamic property, comprises regulating device, double-fed frequency converter and asynchronous machine.Described adjusting gear, when asynchronous machine starts, is adjusted into the asynchronous motor pattern by the mode of operation of asynchronous machine, the control mode of double-fed frequency converter is adjusted into to the V/F control mode that is suitable for described asynchronous motor pattern.Described double-fed frequency converter is controlled described asynchronous machine with the V/F control mode and is moved under the asynchronous motor pattern, makes the rotating speed of described asynchronous machine reach the grid-connected permission rotating speed of double-fed pattern.Then, described adjusting gear is adjusted into the double-fed pattern by the mode of operation of described asynchronous machine, the control mode of described double-fed frequency converter is adjusted into to the vector control mode that is suitable for described double-fed pattern.Described double-fed frequency converter is controlled described asynchronous machine with vector control mode and is moved under the double-fed pattern, described asynchronous machine drives wind power generating set operation to be measured, make the rotating speed of described wind power generating set to be measured reach wind power generation set grid-connection permission rotating speed, so that by wind power generation set grid-connection to be measured, and test the dynamic property of wind power generating set to be measured.The concrete topology diagram of described testing table as shown in Figure 5, comprise: by the net side contactor of transformer access industrial electrical network, double-fed frequency converter, pusher side contactor, stator short-circuiting device, asynchronous machine, stator contactor, gear case, shaft coupling, wherein, described pusher side contactor and stator short-circuiting device are the parts of described regulating device.Described testing table specific works process is as follows:
At first, closed stator short-circuiting device, asynchronous machine is operated under the asynchronous motor pattern, then closed net side contactor, restart net side frequency converter, closing machine side contactor after net side frequency converter synchronously completes, last pusher side frequency converter starts, after the pusher side frequency converter synchronously completes, double-fed frequency converter just can have been controlled the operation of asynchronous machine by the V/F control mode.
After the rotating speed of asynchronous machine reaches the grid-connected permission rotating speed of double-fed pattern, close the pusher side frequency converter, then disconnect the pusher side contactor, disconnect again the stator short-circuiting device, the mode of operation of asynchronous machine is switched to the double-fed pattern, then closing machine side contactor, start the pusher side frequency converter, after the pusher side frequency converter synchronously completes, closed stator contactor, make double-fed frequency converter control the asynchronous machine operation by vector control mode, the load capacity of asynchronous machine is significantly improved, reach the purpose of testing wind power generation unit dynamic property.
Asynchronous machine is via shaft coupling and gear case mechanical connection, make its high rotating speed export gear case to, gear case is by after described high rotating speed reduction of speed, drag wind power generating set operation to be measured by another shaft coupling with wind power generating set mechanical connection to be measured, therefore, the rotating speed of the asynchronous machine by adjusting testing table, just can simulate the running status of the draught fan impeller of wind power generating set to be measured.When the rotating speed of wind power generating set to be measured reaches wind power generation set grid-connection permission rotating speed, by wind power generation set grid-connection to be measured, and given by torque and the power factor of regulating wind power generating set to be measured, complete the test to wind power generating set dynamic property to be measured.
Further, provide together with the electric energy that the electric energy of described testing table consumption is sent with wind power generating set to be measured by industrial electrical network, form an energy circulation system.
The double-fed frequency converter of described testing table, by the conversion of V/F control mode and vector control mode, is controlled the asynchronous machine operation, thereby has been reduced the requirement to frequency inverter capacity.
Fig. 6 is the control system that the embodiment of the present invention provides testing table, and as shown in Figure 6, the control system of described testing table comprises PC, testing table PLC, double-fed frequency converter etc.PC by Ethernet respectively with testing table PLC and wind power generating set PLC(wind-powered electricity generation machine set PLC) be connected, the control of realization to testing table and wind power generating set, for example, PC is controlled two kinds of control modes of double-fed frequency converter and two kinds of mode of operations of asynchronous machine by testing table PLC, by the wind-powered electricity generation machine set PLC, controls grid-connection device by wind power generation set grid-connection.Simultaneously, the data of testing table and wind power generating set also can be respectively by corresponding PLC real-time report to PC.PC processed, shown described data and storage etc., and just can judge the dynamic property of wind power generating set to be measured by analyzing described data, realizes equipment operation and man-machine friendly operation automatically.
Described PC carries out exchanges data by upper computer software with corresponding PLC, and the testing table service data is processed, shows, stored and analyzes.
In sum, the present invention has following technique effect:
The dynamic property that the present invention is the testing wind power generation unit provides a kind of simple and reliable mode, it is not changing in the rated power situation of double-fed frequency converter, greatly improve the load capacity of asynchronous machine, not only simplified the structure of testing table, also reduced the cost of building testing table.
Although above the present invention is had been described in detail, the invention is not restricted to this, those skilled in the art of the present technique can carry out various modifications according to principle of the present invention.Therefore, all modifications of doing according to the principle of the invention, all should be understood to fall into protection scope of the present invention.
Claims (9)
1. the method for a testing wind power generation unit dynamic property, is characterized in that, comprising:
A) when asynchronous machine starts, the mode of operation of asynchronous machine is adjusted into to the asynchronous motor pattern, the control mode of double-fed frequency converter is adjusted into to the voltage V/ frequency F control mode that is suitable for described asynchronous motor pattern;
B) double-fed frequency converter is controlled the asynchronous machine operation with described V/F control mode, after the rotating speed of described asynchronous machine reaches the grid-connected permission rotating speed of double-fed pattern, the mode of operation of asynchronous machine is adjusted into to the double-fed pattern, the control mode of double-fed frequency converter is adjusted into to the vector control mode that is suitable for described double-fed pattern;
C) double-fed frequency converter is controlled the asynchronous machine operation with described vector control mode, make described asynchronous machine drive wind power generating set operation to be measured, after the rotating speed of described wind power generating set to be measured reaches wind power generation set grid-connection permission rotating speed, by wind power generation set grid-connection to be measured, in order to test the dynamic property of wind power generating set to be measured.
2. method according to claim 1, is characterized in that, in described steps A) in, by closed stator short-circuiting device, the mode of operation of asynchronous machine is adjusted into to described asynchronous motor pattern.
3. method according to claim 2, is characterized in that, described step B) comprising:
To connect the net side contactor closure of industrial electrical network, and start successively double-fed frequency converter net side frequency converter, closing machine side contactor, start the pusher side frequency converter of double-fed frequency converter, make double-fed frequency converter control the asynchronous machine operation with the V/F control mode;
Described asynchronous machine moves under described asynchronous motor pattern, after its rotating speed reaches the grid-connected permission rotating speed of double-fed pattern, close described pusher side frequency converter, and disconnect described pusher side contactor, the control mode of double-fed frequency converter is adjusted into to the vector control mode that is suitable for described double-fed pattern.
4. method according to claim 3, is characterized in that, by disconnecting the stator short-circuiting device, the mode of operation of asynchronous machine is adjusted into to described double-fed pattern.
5. according to the described method of claim 3 or 4, it is characterized in that described step C) comprising:
The closing machine side contactor, start the pusher side frequency converter successively, and closed stator contactor makes double-fed frequency converter control the asynchronous machine operation with described vector control mode;
Described asynchronous machine moves under the double-fed pattern, the rotating speed of its output drives wind power generating set operation to be measured after via the gear case reduction of speed, and after the rotating speed of described wind power generating set to be measured reaches wind power generation set grid-connection permission rotating speed, by wind power generation set grid-connection to be measured, in order to test the dynamic property of wind power generating set to be measured.
6. according to the described method of any one in claim 1-5, it is characterized in that, given by torque and the power factor of the rotating speed of adjusting the testing table asynchronous machine, wind power generating set to be measured, test the dynamic property of wind power generating set to be measured.
7. the testing table of a testing wind power generation unit dynamic property, is characterized in that, comprising:
Adjusting gear, for when asynchronous machine starts, the mode of operation of asynchronous machine is adjusted into to the asynchronous motor pattern, the control mode of double-fed frequency converter is adjusted into to the voltage V/ frequency F control mode that is suitable for described asynchronous motor pattern, after described asynchronous machine reaches the grid-connected permission rotating speed of double-fed pattern, the mode of operation of asynchronous machine is adjusted into to the double-fed pattern, the control mode of double-fed frequency converter is adjusted into to the vector control mode that is suitable for described double-fed pattern;
Double-fed frequency converter, for controlling the asynchronous machine operation with V/F control mode or vector control mode;
Asynchronous machine, for after making its rotating speed reach the grid-connected permission rotating speed of double-fed pattern under the V/F of described double-fed frequency converter control mode, drive wind power generating set operation to be measured under the vector control mode of described double-fed frequency converter, allow rotating speed in order to make the rotating speed of described wind power generating set to be measured reach wind power generation set grid-connection, by wind power generation set grid-connection to be measured, and test the dynamic property of wind power generating set to be measured.
8. testing table according to claim 7, is characterized in that, described adjusting gear comprises:
The stator short-circuiting device, for when the closure, make described asynchronous machine in the asynchronous motor pattern, when disconnecting, makes described asynchronous machine in the double-fed pattern.
9. according to the described testing table of claim 7 or 8, it is characterized in that, described regulating device also comprises: the pusher side contactor, for disconnecting after described asynchronous machine reaches the grid-connected permission rotating speed of double-fed pattern, and again closed after the control mode of the mode of operation of adjusting described asynchronous machine and described double-fed frequency converter.
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