CN212622819U - Test circuit and test equipment for alternating current impedance of wind driven generator rotor - Google Patents
Test circuit and test equipment for alternating current impedance of wind driven generator rotor Download PDFInfo
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- CN212622819U CN212622819U CN202021343385.9U CN202021343385U CN212622819U CN 212622819 U CN212622819 U CN 212622819U CN 202021343385 U CN202021343385 U CN 202021343385U CN 212622819 U CN212622819 U CN 212622819U
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Abstract
The utility model discloses a test circuit and test equipment for AC impedance of a wind driven generator rotor, which comprises a voltage regulation module, a measurement module and a switching-on/off module; the voltage regulating module comprises an input winding and an output winding, the output winding comprises an adjustable first output end point and a fixed second output end point, and the input winding comprises a first input end point and a second input end point; the measuring module comprises a first node, a second node, an ammeter, a voltmeter, a current transformer and an overcurrent relay; the switching-on and switching-off module comprises a zero-position protection switch normally-open node, a closing button normally-open node, a switching-off button normally-closed node, a current relay normally-closed node and a time relay. The utility model discloses simple structure can make things convenient for more effectually to test aerogenerator rotor alternating-current impedance.
Description
Technical Field
The utility model relates to an electric power system tests the field, especially relates to a test circuit of aerogenerator rotor alternating current impedance and has test equipment of this circuit.
Background
With the rapid development of national economy, continuous innovation and progress of scientific technology and accelerated development of clean energy, the proportion of wind driven generators in the field of power supply is also getting larger and larger. However, after the technology of generating power by using the generator set is applied in a large quantity, the influence of the operation condition of the grid-connected generator set on the safe and stable operation of the power system is enhanced. In order to ensure the safe and stable long-period operation of a power grid, the health level of power generation equipment is required to be ensured, and the wind driven generator is easy to be subjected to various impacts in the operation process and the turn-to-turn short circuit accident of a generator rotor winding is easy to happen. When the rotor winding generates turn-to-turn short circuit fault, the generator and the fan rotor shaft system are easy to vibrate, and the generator bearing and the rotor stator are damaged.
Therefore, in order to more conveniently and effectively diagnose and detect the electrical test of the wind driven generator, the invention provides the electrical test circuit and the electrical test equipment for the alternating current impedance of the wind driven generator rotor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving in prior art, aerogenerator takes place the electric accident easily at the operation in-process, and the test circuit and the test equipment of a aerogenerator rotor alternating current impedance who provides.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
in a first aspect, an embodiment of the present application provides a test circuit for alternating current impedance of a rotor of a wind turbine, including a voltage regulation module, a measurement module, and a switching-on/off module;
the voltage regulating module comprises an input winding and an output winding, the output winding comprises an adjustable first output end point and a fixed second output end point, and the input winding comprises a first input end point and a second input end point;
the measuring module comprises a first node, a second node, an ammeter, a voltmeter, a current transformer and an overcurrent relay;
the ammeter is electrically coupled between the fixed second output terminal and the first node; the current transformer is electrically coupled between the fixed second output end and the first node and is connected with the ammeter in parallel; the overcurrent relay is electrically coupled between the adjustable first output terminal and the second node; the voltmeter is electrically coupled between the first node and the second node;
the switching-on and switching-off module comprises a zero position protection switch normally-open node, a closing button normally-open node, a switching-off button normally-closed node, a current relay normally-closed node and a time relay;
the zero-position protection switch normally-open node, the closing button normally-open node, the opening button normally-closed node, the current relay normally-closed node and the time relay are sequentially connected in series and electrically coupled between the first input end point and the second input end point.
As a further aspect of the present invention: the measuring module is used for measuring the alternating current impedance of the rotor of the wind driven generator and is electrically connected with the rotor of the generator.
In a second aspect, an embodiment of the present application provides a testing apparatus, including a display panel, a box body, and a cover body;
a test circuit of the alternating current impedance of the wind driven generator rotor is arranged in the box body; the display panel is positioned at the upper part of the box body and is connected with the test circuit of the alternating current impedance of the wind driven generator rotor; the cover body covers the display panel.
As a further aspect of the present invention: the display panel comprises a power indicator, a power-on indicator, an AC/DC voltmeter display screen, an AC/DC ammeter display screen, a socket, a switch, a voltage regulating knob and a binding post terminal;
the terminal post terminal comprises an output terminal post terminal and a grounding terminal post terminal; the switch comprises a power switch, an instrument selection switch, an alternating current and direct current first selection switch and an alternating current and direct current second selection switch;
the socket is connected with the power switch; the power switch is connected with the power indicator light; the power switch is connected with the first input end point and the second input end point in the test circuit of the alternating-current impedance of the wind driven generator rotor;
the power-on indicator lamp is connected with the instrument selection switch; the instrument selection switch is connected with the switching-on/off module in the test circuit of the alternating-current impedance of the wind driven generator rotor;
the alternating current and direct current voltmeter display screen is connected with the voltmeter in the test circuit of the alternating current impedance of the wind driven generator rotor; the alternating current and direct current first selection switch is positioned on the display screen of the alternating current and direct current voltmeter and is used for controlling the alternating current and direct current voltmeter;
the alternating current and direct current ammeter display screen is connected with the voltmeter in the wind driven generator rotor alternating current impedance testing circuit; the alternating current and direct current second selection switch is positioned on the display screen of the alternating current and direct current ammeter and used for controlling the alternating current and direct current ammeter.
Compared with the prior art, the beneficial effects of the utility model are that:
a worker firstly energizes the circuit, and closes the normally open node of the closing button to excite the coil of the alternating current contactor when the voltage regulating module is ensured to be at the zero position. The normally closed node of the opening button is closed, the normally closed node of the current relay is closed, and the power main loop is switched on to enable the voltage regulating module to be electrified. And the voltage regulating knob is rotated to enable the direct current output voltage to be stably boosted from zero to 1000V. The current transformer collects alternating current data, and the voltmeter collects alternating current data. According to the collected voltage and current data, the alternating current impedance value of the generator rotor is described, and according to whether the alternating current impedance value of the generator rotor is balanced, a test conclusion whether the rotor insulation is qualified is given. The utility model discloses in, can make things convenient for more effectually test aerogenerator rotor alternating-current impedance, the electric accident appears in the prevention generator rotor, convenient operation is favorable to the use moreover.
Drawings
Fig. 1 is a schematic structural diagram of a test circuit for ac impedance of a rotor of a wind turbine according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a measurement module in a test circuit for ac impedance of a rotor of a wind turbine according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a testing apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a display panel of a testing apparatus according to an embodiment of the present invention.
In the figure: the system comprises a GTB voltage regulating module, a first output endpoint adjustable by D1, a second output endpoint fixed by D2, a first input endpoint of S1, a second input endpoint of S2, a first node of T1, a second node of T2, a normally open node of an XC zero-position protection switch, a normally open node of a HN closing button, a normally closed node of a TM opening button, a normally closed node of a KI current relay, a C coil, a KT time relay, a 301 box body, a 302 cover body, a 401 power indicator, a 402 output wiring terminal, a 403 power-on indicator, a 404 grounding wiring terminal, a 405 socket, a 406 AC/DC ammeter display screen, a 407 power switch, a 408 instrument selection switch, a 409 voltage regulating knob, a 410 AC/DC voltmeter display screen, a 411 AC/DC first selection switch and a 412 AC/DC second selection switch.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Examples
Referring to fig. 1, the utility model provides a technical scheme: a test circuit for alternating current impedance of a wind driven generator rotor comprises a voltage regulating module GTB, a measuring module and a switching-on/off module;
the voltage regulating module comprises an input winding and an output winding, the output winding comprises an adjustable first output end point D1 and a fixed second output end point D2, and the input winding comprises a first input end point S1 and a second input end point S2;
the measuring module comprises a first node T1, a second node T2, an ammeter, a voltmeter, a current transformer and an overcurrent relay;
the ammeter is electrically coupled between the fixed second output terminal D2 and the first node T1; the current transformer is electrically coupled between the fixed second output terminal D2 and the first node T1 and is connected with the current meter in parallel; the overcurrent relay is electrically coupled between the adjustable first output terminal D1 and the second node T2; the voltmeter is electrically coupled between the first node T1 and the second node T2;
the opening and closing module comprises a zero position protection switch normally-open node XC, a closing button normally-open node HN, an opening button normally-closed node TM, a current relay normally-closed node KI and a time relay KT;
zero-position protection switch normally open node XC, the normal open node HN of close button, separating brake button normally closed node TM, current relay normally closed node KI and time relay KT establish ties in proper order, the electrical coupling extremely first input endpoint S1 with between the second input endpoint S2.
The GTB selects a voltage regulating module made of a high-permeability silicon steel sheet iron core to completely isolate the input voltage from the output voltage. The input winding and the output winding of the voltage regulating module are electrically isolated through electromagnetic coupling, complete isolation between high voltage and low voltage is ensured, and the safety of an instrument and tested equipment is ensured.
And when the normally open node XC of the zero-position protection switch is closed, the contactor can be started. After the contactor is started, when the GTB leaves a zero position, the GTB can be continuously adjusted; when the normally closed node TM of the opening button is closed, the coil of the contactor loses power. In the process, the starting condition of the voltage regulating module GTB can be limited, so that the voltage regulating module GTB can only be started at a zero position, and the overvoltage generated by misoperation of the voltage regulating module GTB at any position is prevented from bringing danger to instruments, tested articles and testers. Wherein, still include time relay KT, can set up the fixed time, in test process, apply the unfavorable overlength of big voltage time, require to accomplish the experiment rapidly, prevent that testing personnel from neglecting, time relay KT gives the delay back, makes isolated voltage regulator GTB's input winding one side outage, also can play the effect of protection test instrument and equipment under test.
Referring to fig. 2, in the measurement module, the current transformer collects ac current data, and the voltmeter collects ac voltage data. In the use process, when overload, load, breakdown of tested equipment or breakdown of a generator occur, and the load current exceeds the rated current of the overcurrent relay, the automatic switch backflow auxiliary node is disconnected, the power supply of the instrument is cut off, and the safety of the instrument, a tested article and testing personnel can be ensured.
In this embodiment, specifically: the measuring module is used for measuring the alternating current impedance of the rotor of the wind driven generator and is electrically connected with the rotor of the generator; through the arrangement, the current transformer in the measuring module collects alternating current data, the voltmeter collects alternating voltage data, and the alternating current impedance value of the rotor of the wind driven generator can be depicted.
According to the working principle, through the arrangement, a circuit is electrified firstly, and when the voltage regulating module GTB is ensured to be at a zero position, the normally open node HN of the closing button is closed, so that a coil of the alternating current contactor is excited. And the normally closed node TM of the opening button is closed, the normally closed node KI of the current relay is closed, and the main power loop is switched on to enable the voltage regulating module GTB to be electrified. And the voltage regulating knob is rotated to enable the direct current output voltage to be stably boosted from zero to 1000V. The current transformer collects alternating current data, and the voltmeter collects alternating current data. According to the collected voltage and current data, the alternating current impedance value of the generator rotor is described, and according to whether the alternating current impedance value of the generator rotor is balanced, a test conclusion whether the rotor insulation is qualified is given.
When a trigger of the generator overvoltage protection device is started, instrument overcurrent protection is started, the normally closed node KI of the current relay is opened, the coil of the alternating current contactor loses power, and the instrument working power supply is cut off. In the whole process, the safety of instruments, tested articles and testing personnel can be ensured. In this embodiment, can make things convenient for more effectually test aerogenerator rotor alternating current impedance, prevent that the electric accident from appearing in the generator rotor, easy operation moreover.
Referring to fig. 3, the present invention further provides a testing apparatus, which includes a display panel, a box 301 and a cover 302; a test circuit of the alternating current impedance of the wind driven generator rotor is arranged in the box body 301; the display panel is positioned at the upper part of the box body 301 and is connected with a test circuit of the alternating current impedance of the wind driven generator rotor; the cover 302 covers the display panel.
Through the arrangement, the display panel can display by using a 0.5-level four-digit half-panel type digital display meter and is installed in an embedded mode. The test circuit for the alternating current impedance of the wind driven generator rotor is arranged and installed in the box body 301, the display panel which is convenient and reasonable is designed at the upper part of the box body 301, and the cover body 302 which can be lifted is also designed on the box body 301. When a worker wants to test the alternating-current impedance of the wind turbine rotor, the worker needs to open the cover 302, control the display panel, and be able to power on the whole equipment and power on the instrument. After the test is completed, the cover 302 is closed. Thus, the process is very safe to operate and very convenient and fast to use. The cover body 302 has good waterproof, damp-proof and shockproof effects.
Referring to fig. 4, in this embodiment, specifically: the display panel comprises a power supply indicator lamp 401, a power-on indicator lamp 403, an alternating current and direct current voltmeter display screen 410, an alternating current and direct current ammeter display screen 406, a socket 405, a switch, a voltage regulating knob 409 and a binding post terminal;
the lug terminals include an output lug terminal 402 and a ground lug terminal 404; the switches comprise a power switch 407, an instrument selection switch 408, an alternating current/direct current first selection switch 411 and an alternating current/direct current second selection switch 412;
the socket 405 is connected to the power switch 407; the power switch 407 is connected to the power indicator 401; the power switch 407 is connected to the first input terminal S1 and the second input terminal S2 in the test circuit of the wind turbine rotor ac impedance;
the power-on indicator lamp 403 is connected with the instrument selection switch 408; the instrument selection switch 408 is connected with the switching-on/off module in the test circuit of the alternating-current impedance of the wind driven generator rotor;
the display screen 410 of the alternating current/direct current voltmeter is connected with the voltmeter in the test circuit of the alternating current impedance of the wind driven generator rotor; the ac/dc first selection switch 411 is located on the ac/dc voltmeter display screen 410, and is used for controlling the ac/dc voltmeter;
the display screen 406 of the alternating current/direct current meter is connected with the voltmeter in the test circuit of the alternating current impedance of the wind driven generator rotor; the ac/dc second selection switch 412 is located on the ac/dc current meter display 406 and is used to control the ac/dc current meter.
Through the arrangement, when the socket 405 can be connected with a power supply, the whole equipment is powered on by pressing the power switch 407, and at the moment, the power indicator lamp 401 is turned on to indicate that the power supply is powered on successfully; when the instrument selection switch 408 is pressed, the power-on indicator lamp 403 is turned on, which indicates that all components are successfully powered on. The measurement of the alternating current and the direct current is selected through the alternating current and direct current first selection switch 411, and the measurement result is displayed on the display screen 406 of the alternating current and direct current meter; the measurement of the alternating voltage and the direct voltage is selected through the alternating current/direct current second selection switch 412, and the measurement result is displayed on the display screen 406 of the alternating current/direct current voltmeter.
The working principle is as follows: in this embodiment, the worker opens the cover 302, controls the display panel to test the ac impedance of the rotor of the wind turbine, and covers the cover 302 after the test is completed. The operation is carried out by using the control panel, so that the operation is safer and quicker. The cover body has good waterproof, damp-proof and shockproof effects. Therefore, the alternating-current impedance of the rotor of the wind driven generator can be tested more conveniently and effectively, the electric accident of the rotor of the wind driven generator is prevented, and the operation is simple.
In the description of the present application, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, a connection through an intermediate medium, and a connection between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to specific circumstances.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (4)
1. A test circuit for alternating current impedance of a wind driven generator rotor is characterized by comprising a voltage regulating module, a measuring module and a switching-on/off module;
the voltage regulating module comprises an input winding and an output winding, the output winding comprises an adjustable first output end point and a fixed second output end point, and the input winding comprises a first input end point and a second input end point;
the measuring module comprises a first node, a second node, an ammeter, a voltmeter, a current transformer and an overcurrent relay;
the ammeter is electrically coupled between the fixed second output terminal and the first node; the current transformer is electrically coupled between the fixed second output end and the first node and is connected with the ammeter in parallel; the overcurrent relay is electrically coupled between the adjustable first output terminal and the second node; the voltmeter is electrically coupled between the first node and the second node;
the switching-on and switching-off module comprises a zero position protection switch normally-open node, a closing button normally-open node, a switching-off button normally-closed node, a current relay normally-closed node and a time relay;
the zero-position protection switch normally-open node, the closing button normally-open node, the opening button normally-closed node, the current relay normally-closed node and the time relay are sequentially connected in series and electrically coupled between the first input end point and the second input end point.
2. The wind turbine rotor AC impedance testing circuit according to claim 1, wherein the measuring module is used for measuring the AC impedance of the wind turbine rotor and is electrically connected to the rotor of the generator.
3. A test apparatus, comprising: the display device comprises a display panel, a box body and a cover body;
a test circuit for the alternating current impedance of the wind driven generator rotor as claimed in any one of claims 1 and 2 is arranged in the box body; the display panel is positioned at the upper part of the box body and is connected with the test circuit of the alternating current impedance of the wind driven generator rotor; the cover body covers the display panel.
4. The test equipment of claim 3, wherein the display panel comprises a power indicator light, a power on indicator light, an AC/DC voltmeter display screen, an AC/DC ammeter display screen, a socket, a switch, a voltage regulating knob and a terminal post terminal;
the terminal post terminal comprises an output terminal post terminal and a grounding terminal post terminal; the switch comprises a power switch, an instrument selection switch, an alternating current and direct current first selection switch and an alternating current and direct current second selection switch;
the socket is connected with the power switch; the power switch is connected with the power indicator light; the power switch is connected with the first input end point and the second input end point in the test circuit of the alternating-current impedance of the wind driven generator rotor;
the power-on indicator lamp is connected with the instrument selection switch; the instrument selection switch is connected with the switching-on/off module in the test circuit of the alternating-current impedance of the wind driven generator rotor;
the alternating current and direct current voltmeter display screen is connected with the voltmeter in the test circuit of the alternating current impedance of the wind driven generator rotor; the alternating current and direct current first selection switch is positioned on the display screen of the alternating current and direct current voltmeter and is used for controlling the alternating current and direct current voltmeter;
the alternating current and direct current ammeter display screen is connected with the voltmeter in the wind driven generator rotor alternating current impedance testing circuit; the alternating current and direct current second selection switch is positioned on the display screen of the alternating current and direct current ammeter and used for controlling the alternating current and direct current ammeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021343385.9U CN212622819U (en) | 2020-07-09 | 2020-07-09 | Test circuit and test equipment for alternating current impedance of wind driven generator rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021343385.9U CN212622819U (en) | 2020-07-09 | 2020-07-09 | Test circuit and test equipment for alternating current impedance of wind driven generator rotor |
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| Publication Number | Publication Date |
|---|---|
| CN212622819U true CN212622819U (en) | 2021-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021343385.9U Active CN212622819U (en) | 2020-07-09 | 2020-07-09 | Test circuit and test equipment for alternating current impedance of wind driven generator rotor |
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| CN (1) | CN212622819U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116735942A (en) * | 2023-08-09 | 2023-09-12 | 南方电网调峰调频发电有限公司 | System and method for measuring low-frequency current on rotor side of variable-speed generator motor |
-
2020
- 2020-07-09 CN CN202021343385.9U patent/CN212622819U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116735942A (en) * | 2023-08-09 | 2023-09-12 | 南方电网调峰调频发电有限公司 | System and method for measuring low-frequency current on rotor side of variable-speed generator motor |
| CN116735942B (en) * | 2023-08-09 | 2023-11-03 | 南方电网调峰调频发电有限公司 | System and method for measuring low-frequency current on rotor side of variable-speed generator motor |
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