CN219711728U - Variable pitch detection system for simulating fluctuation of power grid - Google Patents
Variable pitch detection system for simulating fluctuation of power grid Download PDFInfo
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- CN219711728U CN219711728U CN202320331178.9U CN202320331178U CN219711728U CN 219711728 U CN219711728 U CN 219711728U CN 202320331178 U CN202320331178 U CN 202320331178U CN 219711728 U CN219711728 U CN 219711728U
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Abstract
The utility model discloses a variable pitch detection system for simulating power grid fluctuation, which comprises an upper computer, a first power supply circuit, an external power supply and a variable pitch module, wherein the variable pitch module comprises a variable pitch motor and a variable pitch control cabinet, the first power supply circuit comprises a voltage regulator, a controller and a voltage transmitter, one end of the voltage regulator is connected with the external power supply, and the other end of the voltage regulator is connected with the variable pitch control cabinet; the control end of the voltage regulator is connected with the controller; the voltage transmitter is arranged between the voltage regulator and the variable pitch control cabinet, and the signal output end of the voltage transmitter is connected with the controller; the controller is respectively connected with the upper computer and the variable pitch control cabinet; the control end of the variable pitch motor is connected with a variable pitch control cabinet. The operator can simulate the test of the influence of the fluctuation of the power grid on the electric variable pitch on the ground by controlling the upper computer, so that the reliability of the precision in the test time is ensured, the safety of the tester is ensured, the implementation is easy, and the cost is low.
Description
Technical Field
The utility model relates to a variable pitch detection system for simulating power grid fluctuation, and belongs to the technical field of power grid detection.
Background
In a wind generating set, a pitch module is one of the most critical control systems, and the safety and reliability of the working performance of the pitch module directly relate to the safety and the availability of the set. Under the condition of external normal power supply, the pitch-variable module receives pitch angle and pitch-variable speed instructions given by the main control system through the communication bus, and controls the pitch-variable motor through the pitch-variable controller and the pitch-variable driver to adjust the change of the pitch angle, so that the rotating speed and the power of the generator are adjusted. When the unit fails, the variable pitch module enables the blades to feathere to 90 degrees to stop the fan, so that the safety of the unit is protected. When the power grid fluctuates, the variable pitch module can work normally, whether the unit can complete high and low voltage ride through is related, if the high and low voltage ride through cannot be completed, the fluctuation of the power grid is aggravated, even a power-up station network access switch is caused to trip, and the fault is amplified; when the power grid fails, such as sudden power failure and power grid phase failure, the variable pitch module can finish feathering to a safe stop position, and safety of the unit is related. If the pitch module does not pass the relevant test, after a large number of installation, the power grid faults are complained and the power grid cannot work normally, and huge safety risks exist for power generation enterprises.
At present, the power grid fluctuation test of the electric variable pitch module is carried out along with the on-site test of the whole machine (comprising a main control system, a transmission chain system, a converter system and a variable pitch module), so that test equipment is huge and the detection cost is high; if a manual voltage regulator is adopted to independently measure the electric pitch module, the problems of danger and insufficient detection time precision are faced.
The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art, and provides a variable pitch detection system for simulating power grid fluctuation, so that an operator can test the influence of the simulated power grid fluctuation on the electric variable pitch on the ground by controlling an upper computer, the reliability of precision in test time is ensured, the safety of the tester is ensured, the implementation is easy, and the cost is low.
In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:
the utility model discloses a pitch detection system for simulating power grid fluctuation, which comprises an upper computer, a first power supply circuit, an external power supply and a pitch module, wherein the pitch module comprises a pitch motor and a pitch control cabinet,
the first power supply circuit comprises a voltage regulator, a controller and a voltage transmitter, one end of the voltage regulator is connected with an external power supply, and the other end of the voltage regulator is connected with a variable pitch control cabinet; the control end of the voltage regulator is connected with the controller;
the voltage transmitter is arranged between the voltage regulator and the variable pitch control cabinet, and the signal output end of the voltage transmitter is connected with the controller;
the controller is respectively connected with the upper computer and the variable pitch control cabinet; and the control end of the variable-pitch motor is connected with a variable-pitch control cabinet.
Further, an Ethernet port, an RS485 communication interface and a CAN communication interface are configured in the controller;
the controller is connected with the upper computer through an Ethernet port, the controller is connected with the voltage regulator through an RS485 communication interface, and the controller is connected with the variable pitch control cabinet through a CAN communication interface.
Further, the variable pitch control device also comprises a second power supply circuit, wherein the external power supply is connected with the variable pitch control cabinet through the second power supply circuit; the second power supply circuit comprises a second switch and a first contactor, and control ends of the second switch and the first contactor are respectively connected with the controller.
Further, the voltage regulator has a voltage regulating range of 0-500V and a capacity of 30KVA.
Further, the pitch module further comprises a pitch speed reducer and a blade prosthesis, and the pitch speed reducer and the blade prosthesis are respectively connected with a pitch motor.
Further, the pitch module further comprises a backup power supply, and the backup power supply is connected with the pitch control cabinet and used for providing a backup power supply.
Compared with the prior art, the utility model has the beneficial effects that:
according to the system for detecting the variable pitch of the power grid fluctuation, disclosed by the utility model, an operator can remotely control the controller and the voltage regulator on the ground through the upper computer, simulate the condition of the power grid fluctuation and detect the working performance and the safety performance of the variable pitch module. On one hand, manual adjustment of the voltage stabilizing and regulating device by personnel is avoided, and safety of the testing personnel is guaranteed to the greatest extent; on the other hand, compared with manual adjustment, the remote control implementation of the whole system ensures the reliability of precision in test time.
Drawings
FIG. 1 is a block diagram of a pitch detection system simulating grid fluctuations;
FIG. 2 is a schematic diagram of an interface display of the host computer;
FIG. 3 is a schematic circuit diagram of a pitch detection system simulating grid fluctuations;
FIG. 4 is a schematic diagram of a digital quantity output unit of the controller;
FIG. 5 is a schematic diagram of a digital quantity input unit of the controller;
fig. 6 is a schematic diagram of an interface and analog acquisition module of the controller.
Detailed Description
The utility model is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.
Examples
The embodiment discloses a pitch detection system for simulating power grid fluctuation, which comprises an upper computer, a first power supply circuit, an external power supply and a pitch module, wherein the pitch module comprises a pitch motor and a pitch control cabinet V1,
the first power supply circuit comprises a voltage regulator U2, a controller and a voltage transmitter U1, one end of the voltage regulator U2 is connected with an external power supply, and the other end of the voltage regulator U2 is connected with a variable pitch control cabinet V1; the control end of the voltage regulator U2 is connected with the controller;
the voltage transmitter U1 is arranged between the voltage regulator U2 and the variable pitch control cabinet V1, and the signal output end of the voltage transmitter U1 is connected with the controller;
the controller is respectively connected with the upper computer and the variable pitch control cabinet V1; the control end of the variable-pitch motor is connected with a variable-pitch control cabinet V1.
The technical conception of the utility model is as follows: an operator can remotely control the controller and the voltage regulator U2 through the upper computer on the ground to simulate the fluctuation condition of the power grid and detect the working performance and the safety performance of the pitch module. On one hand, manual adjustment of the voltage-stabilizing voltage regulator U2 by personnel is avoided, and safety of the testers is ensured to the greatest extent; on the other hand, compared with manual adjustment, the remote control implementation of the system ensures the reliability of precision in test time.
Specifically, as shown in fig. 1 and fig. 3, a pitch detection system simulating power grid fluctuation further includes a second power supply circuit, and an external power supply is connected to a pitch control cabinet V1 through the second power supply circuit.
The second power supply circuit comprises a second switch QF2 and a first contactor KM1, and control ends of the second switch QF2 and the first contactor KM1 are respectively connected with a controller.
The first power supply circuit further comprises a third switch QF3, a second contactor KM2 and a third contactor KM3, and control ends of the third switch QF3, the second contactor KM2 and the third contactor KM3 are respectively connected with the controller.
The output end of the external power supply is also provided with a first switch QF1 for controlling the external power supply, namely the total power supply. The system is also provided with a fourth switch QF4 for controlling the power supply of each switch.
It should be noted that, the first power supply circuit is a voltage regulator U2 power supply circuit, and the second power supply circuit is a normal power supply circuit. The second switch QF2 is used for controlling the power supply of the normal power supply circuit, and the third switch QF3 is used for controlling the power supply of the power supply circuit of the voltage regulator U2.
An Ethernet port, an RS485 communication interface and a CAN communication interface are configured in the controller. The controller is connected with the upper computer through an Ethernet port, is connected with the voltage regulator U2 through an RS485 communication interface, and is connected with the variable pitch control cabinet V1 through a CAN communication interface. The communication mode between the controller and the upper computer is Modbus TCP, the communication mode between the controller and the voltage regulator U2 is Modbus RTU, and the communication mode between the controller and the variable pitch control cabinet V1 is CANOpen.
The controller is also internally provided with a digital quantity input unit, a digital quantity output unit and an analog quantity detection unit. The analog quantity detection unit is used for detecting an analog quantity signal output by the voltage transmitter U1 according to the analog voltage; the digital quantity input unit is used for receiving feedback signals of the first switch QF1, the second switch QF2, the third switch QF3, the fourth switch QF4, the first contactor KM1, the second contactor KM2 and the third contactor KM3, as shown in FIG. 5; the digital quantity output unit is used for outputting control signals of the first contactor KM1, the second contactor KM2 and the third contactor KM3, as shown in fig. 4.
The specific working principle is as follows:
(1) The upper computer gives out a voltage regulating value, the voltage regulating value is transmitted to the controller in a Modbus TCP communication mode through the Ethernet port, and the controller is transmitted to the voltage regulator U2 in a Modbus RTU communication mode through the RS485 interface. The voltage regulator U2 controls the output voltage, simulates high voltage and low voltage generated by power grid voltage fluctuation, and feeds the high voltage and the low voltage back to the controller through the voltage transmitter U1.
When the fed back voltage is equal to the set voltage value, the controller controls the switching of each switch and the contactor to enable the power supply of the pitch module to be switched from the normal power supply circuit to the power supply circuit of the voltage regulator U2, and the performance of the pitch module is detected.
(2) The controller sends pitch angle, pitch speed and pitch motor starting instructions to the pitch control cabinet V1 in a CANOpen communication mode through the CAN communication interface to enable the pitch motor to operate, feedback values of the pitch module, such as bus voltage, pitch angle, motor current, state code, fault code and the like, are collected, and then are uploaded to the upper computer in a modbus TCP communication mode through the Ethernet port to observe the operation state of the pitch module.
The pitch module further comprises a pitch actuating mechanism and a backup power supply, wherein the pitch actuating mechanism is connected with a pitch motor, and the backup power supply is connected with a pitch control cabinet V1 and used for providing a backup power supply. Wherein, the pitch actuator includes pitch reducer and blade prosthesis.
The variable pitch control cabinet V1 receives the pitch angle and variable pitch speed instructions issued by the controller through a CANOpen communication mode, and controls the variable pitch motor to drive the blade prosthesis to operate. When the outside of the variable pitch module is powered off, the backup power supply drives the blade prosthesis to feather to a safe stop position.
Based on safety and convenience, the touch screen is not installed on the controller, but a set of independent upper computer is separated from the controller, and a modbus TCP communication mode is adopted between the upper computer and the controller for signal and data interaction. The upper computer adopts the configuration king, and comprises a computer and a display, and a configuration monitoring picture is formed on the computer. The display schematic diagram of the monitoring interface of the upper computer is shown in fig. 2.
The working principle of the upper computer comprises (1) inputting the voltage value to be simulated, displaying the output voltage of the voltage regulator, displaying the time of the variable pitch module in the fluctuation operation of the power grid, and controlling the switching of the power supply loop. (2) The pitch angle and the pitch speed are issued to the pitch module, and the starting, fault resetting and the like of the pitch driver are controlled; and simultaneously, parameters of the pitch module, such as direct current bus voltage, pitch angle, motor current and the like, and communication states are displayed.
In the embodiment, the model of the voltage regulator is TESGZ-32; the model of the controller is CX5010 (CPU), the model of the digital quantity input unit inside the controller is EL1008, the model of the digital quantity output unit is EL2008, and the model of the analog quantity detection unit is EL3061; the model of the voltage transmitter is MIK-SDJU-A; the model of the variable pitch control cabinet is EPS900; the model of the upper computer is KingView7.5SP5.
In summary, the overall workflow of the system is far from the following:
step one: the first switch QF1 is closed, and an external power supply is connected.
And closing the second switch QF2, and enabling the second power supply circuit to obtain power, so as to realize the power obtaining of the normal power supply circuit.
And the third switch QF3 is closed, the first power supply circuit is powered, and the power supply circuit of the voltage regulator U2 is powered.
Step two: in order to simulate the voltage fluctuations of the power network, the fluctuating voltage values are first set.
Setting a voltage value in a voltage given value dialog box in an interface of an upper computer, wherein the setting of the voltage value is according to requirements in the high voltage ride through test procedure of the NB\T 31111-2017 wind turbine generator set and the low voltage ride through capability test procedure of the NB\T 31051-2014 wind turbine generator set, such as high voltage setting of 1.3UN and 494V.
The upper computer sends the voltage regulator U2 in a Modbus TCP communication mode through an Ethernet port, the controller sends the voltage regulator U2 in a Modbus RTU communication mode through an RS485 interface, the voltage regulator U2 starts to regulate voltage, the voltage transmitter U1 detects the output voltage of the electric voltage regulator U2 and feeds the output voltage back to an analog quantity detection module A of the controller in an analog quantity signal, as shown in FIG. 6.
And when the voltage feedback value of the upper computer interface is equal to the voltage set value, the output of the voltage regulator U2 is correct, and the voltage regulator has the voltage value generated by simulating the fluctuation of the power grid.
Step three: in the voltage regulating module of the upper computer interface, a normal power supply button is clicked, the first contactor KM1 is controlled to be closed through the controller, the upper computer interface is normally powered to display a lamp on, the voltage regulator U2 is powered to display a lamp off, and the pitch control module is powered by a normal circuit.
And closing a switch in the variable-pitch control cabinet V1 to enable the variable-pitch control cabinet V1 to be powered on, and enabling equipment such as a variable-pitch driver to be powered on.
In the simulation main control module in the upper computer interface, a pitch angle value, such as 20 degrees, a pitch speed value, such as 5 degrees/s, are given to the pitch module, a starting instruction is issued to the pitch module, an automatic given button is pressed, and the pitch motor drives the blade prosthesis to reciprocate between 0 degrees and 20 degrees.
Step four: clicking a power supply button of a voltage regulator U2 in a monitoring interface of an upper computer during the running period of the variable-pitch motor, opening a first contactor KM1, closing a second contactor KM2, switching the power supply of the variable-pitch module from a normal power supply circuit to the power supply circuit of the voltage regulator U2, enabling a power supply indicator lamp of the voltage regulator U2 of the upper computer interface to be on, and enabling the normal power supply indicator lamp to be off, wherein the power supply voltage of the variable-pitch module is 494V at the moment, and simulating the voltage rise of a power grid; and recording a running time dialog box in the upper computer interface, and if the running time is more than 200ms, not reporting a fault by the pitch module, so that the design of the pitch module is proved to meet the design requirement.
Step five: clicking a normal power supply button on the interface of the upper computer, opening the second contactor KM2, closing the first contactor KM1, recovering normal power supply of the variable-pitch module, and reciprocating the blade prosthesis between 0 and 20 degrees.
Step six: clicking a power grid power-down button in an upper computer interface, and at the moment, disconnecting the first contactor KM1 to simulate power grid power-down.
And observing the running state of the variable-pitch module, wherein the variable-pitch module should report a fault, and the variable-pitch motor is driven by a backup power supply to return to a safe stop position and stop, so that the design of the variable-pitch module meets the safety requirement.
For the low-voltage operation generated by simulating the fluctuation of the power grid and the operation of the pitch module under the condition of low voltage, the operation method is the same as the second to fourth steps;
for the operation and test of simulating the high voltage generated by the voltage fluctuation of the power grid and running the pitch module under the phase failure condition, the steps one to three are the same, and the operation of the step four is as follows: clicking a power grid open-phase button to enable the first contactor KM1 to be opened, enabling the third contactor KM3 to be closed, enabling an open-phase operation indicator lamp of an upper computer interface to be on at the moment, enabling a normal power supply indicator lamp to be off, observing the operation time of the pitch control module, and if the pitch control module does not embrace faults in the time meeting the high-low through requirements of the power grid, indicating that the pitch control module meets the design requirements.
In summary, the voltage output of the voltage regulator U2 is remotely controlled on the computer by the tester, so as to simulate the high voltage and the low voltage generated when the power grid fluctuates, and the power is normally supplied to the pitch module, the pitch module operates by simulating the given pitch angle and pitch speed of the main control, and the power supply loop is switched on the computer by the tester, so that the influence of the power grid fluctuation on the pitch module is quickly and accurately simulated, and the performance of the pitch module is detected; in addition, because the tester is remote operation, the manual adjustment voltage-stabilizing voltage regulator U2 of personnel has been avoided, the maximum assurance tester safety. Compared with the manual regulation of the output voltage of the voltage regulator U2 and the manual control loop switching, the system is safer, faster and more accurate.
In the description of the present utility model, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present utility model, and such modifications and variations should also be regarded as being within the scope of the utility model.
Claims (6)
1. A pitch detection system simulating power grid fluctuation is characterized by comprising an upper computer, a first power supply circuit, a controller, a voltage transmitter, an external power supply and a pitch module,
the pitch module comprises a pitch motor and a pitch control cabinet;
the first power supply circuit comprises a voltage regulator, a second contactor and a third contactor, one end of the voltage regulator is connected with an external power supply, and the other end of the voltage regulator is connected with a variable pitch control cabinet; the second contactor and the third contactor are connected in parallel between the voltage regulator and the variable pitch control cabinet; the control ends of the voltage regulator, the second contactor and the third contactor are respectively connected with the controller;
the voltage transmitter is arranged between the voltage regulator and the variable pitch control cabinet, and the signal output end of the voltage transmitter is connected with the controller;
the controller is respectively connected with the upper computer and the variable pitch control cabinet; and the control end of the variable-pitch motor is connected with a variable-pitch control cabinet.
2. The pitch detection system for simulating power grid fluctuation according to claim 1, wherein an Ethernet port, an RS485 communication interface and a CAN communication interface are configured in the controller;
the controller is connected with the upper computer through an Ethernet port, the controller is connected with the voltage regulator through an RS485 communication interface, and the controller is connected with the variable pitch control cabinet through a CAN communication interface.
3. The pitch detection system for simulating power grid fluctuations of claim 1, further comprising a second power supply circuit, wherein the external power supply is connected to the pitch control cabinet through the second power supply circuit;
the second power supply circuit comprises a second switch and a first contactor, and control ends of the second switch and the first contactor are respectively connected with the controller.
4. The pitch detection system for simulating power grid fluctuations of claim 1, wherein the voltage regulator has a voltage regulation range of 0-500V and a capacity of 30KVA.
5. The pitch detection system for simulating power grid fluctuations of claim 1, wherein the pitch module further comprises a pitch reducer and a blade prosthesis, the pitch reducer and the blade prosthesis being respectively connected to a pitch motor.
6. The pitch detection system for simulating power grid fluctuations of claim 1, wherein the pitch module further comprises a backup power source connected to the pitch control cabinet for providing backup power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320331178.9U CN219711728U (en) | 2023-02-28 | 2023-02-28 | Variable pitch detection system for simulating fluctuation of power grid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320331178.9U CN219711728U (en) | 2023-02-28 | 2023-02-28 | Variable pitch detection system for simulating fluctuation of power grid |
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| CN219711728U true CN219711728U (en) | 2023-09-19 |
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| CN202320331178.9U Active CN219711728U (en) | 2023-02-28 | 2023-02-28 | Variable pitch detection system for simulating fluctuation of power grid |
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