CN110231787B - Compact RIO-based magnetic valve type controllable reactor measurement and control system and measurement and control method - Google Patents
Compact RIO-based magnetic valve type controllable reactor measurement and control system and measurement and control method Download PDFInfo
- Publication number
- CN110231787B CN110231787B CN201910424569.3A CN201910424569A CN110231787B CN 110231787 B CN110231787 B CN 110231787B CN 201910424569 A CN201910424569 A CN 201910424569A CN 110231787 B CN110231787 B CN 110231787B
- Authority
- CN
- China
- Prior art keywords
- thyristor
- measurement
- fpga
- magnetic valve
- valve type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
-
- 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
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Electrical Variables (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a compact RIO-based magnetic valve type controllable reactor measurement and control system and a measurement and control method. The measurement and control system comprises an upper computer with a Labview platform, a compact RIO controller, a voltage transformer, a current transformer, an optical fiber temperature sensor, an electro-optical conversion circuit, a thyristor drive circuit, an auxiliary power supply and a magnetic valve type controllable reactor; the compact RIO controller comprises an integrated controller, an analog input module and a digital I/O interface module, wherein the integrated controller comprises a real-time controller and an FPGA; the upper computer with the Labview platform is connected with the real-time controller through the Ethernet; the analog input module transmits the acquired analog signal to the FPGA; the FPGA transmits the generated thyristor trigger pulse to the digital I/O interface module for output. The invention is developed based on an embedded controller compact RIO and a graphical programming language Labview, is used for digital control and state quantity observation of the magnetic valve type controllable reactor, and realizes safe operation, control performance optimization and state monitoring of the magnetic valve type controllable reactor.
Description
Technical Field
The invention belongs to the field of magnetic valve type controllable reactors, and particularly relates to a compact RIO-based magnetic valve type controllable reactor measurement and control system and a measurement and control method.
Background
The reactive power compensation device is required to be configured in the power transmission and distribution system to improve the transmission capability of active power, improve the stability of the alternating current power transmission system, improve the electric energy transmission efficiency, relieve the influence of transient overvoltage on the power system and reduce the probability of system breakdown.
Among a plurality of devices for compensating the reactive power of the power grid, a Magnetic valve Controllable Reactor (MCR) has the advantages of continuously adjustable reactive power, high reliability, wide application in various voltage levels of the power grid (6-500 KV), low cost and the like, and is widely used. At present, an MCR control platform is mainly realized based on a DSP and an ARM, wherein the DSP is used for digital control of the MCR, the operation speed is high, the precision is high, and the MCR can be quickly and accurately controlled; the ARM is mainly used for developing an upper computer and is used for displaying running state data and issuing control instructions. And the DSP calculates the trigger angle of the thyristor according to the current working state of the MCR and a set control target through a control program, generates a trigger pulse signal of the thyristor and drives the thyristor to be conducted, so that the continuous adjustment of the reactive power of the MCR is realized. The upper computer sends a control command and simultaneously displays state variables of a thyristor, such as a conduction angle, a working voltage effective value, a working current effective value, a reactive power average value and the like. The control platform needs developers to design hardware circuits, write control algorithm programs and develop an upper computer respectively aiming at the DSP and the ARM, and the development task is heavy and the period is long. In addition, operation and maintenance personnel need to observe real-time information of MCR state quantity when debugging the MCR, and a high-voltage test field is difficult to be directly externally connected with measuring equipment such as an oscilloscope and a wave recorder. The current MCR measurement and control system can only display effective values of electrical state quantities such as voltage, current and the like, cannot display instantaneous values, and is lack of important state quantities such as iron core saturation, thyristor temperature and the like. In a word, the existing MCR measurement and control platform is lack of state quantity display, is not friendly to operation and maintenance personnel of a transformer substation, and needs to develop a signal acquisition and display platform with high sampling rate and real-time property aiming at a high-voltage field in order to meet the test and debugging requirements, so that the cost is further increased.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects in the prior art, and provide a magnetic valve type controllable reactor measurement and control system based on compact RIO, so that the problems of heavy development task, high cost and long period caused by the fact that a hardware circuit, a control algorithm and an upper computer need to be specially developed in the existing control platform based on DSP and ARM are solved, and the inconvenience is caused to transformer substation operation and maintenance personnel during debugging and maintaining equipment due to the fact that the existing measurement and control system lacks part of important equipment state quantity.
Therefore, the invention adopts the following technical scheme: a magnetic valve type controllable reactor measurement and control system based on CompactRIO comprises an upper computer with a Labview platform, a CompactRIO controller, a voltage transformer, a current transformer, an optical fiber temperature sensor, an electro-optic conversion circuit, a thyristor drive circuit, an auxiliary power supply and a magnetic valve type controllable reactor;
the compact RIO controller comprises an integrated controller, an analog input module and a digital I/O interface module, wherein the integrated controller comprises a real-time controller and an FPGA; the upper computer with the Labview platform is connected with the real-time controller through the Ethernet, so that data transmission between the upper computer with the Labview platform and the real-time controller is realized; the analog input module transmits the acquired analog signal to the FPGA; the FPGA transmits the generated digital pulse signal to a digital I/O interface module for output;
the input ends of the voltage transformer and the current transformer are connected with the magnetic valve type controllable reactor and are used for measuring the working voltage and the working current of the magnetic valve type controllable reactor; the output ends of the voltage transformer and the current transformer are connected with the input end of the analog quantity input module, and the collected working voltage and working current of the magnetic valve type controllable reactor are transmitted to the analog quantity input module; the optical fiber temperature sensor is arranged in an iron core of the magnetic valve type controllable reactor, measures and collects the temperature of the iron core and transmits the temperature to the analog quantity input module; the output of the digital I/O interface module is connected to the input of an electro-optical conversion circuit through a shielded wire and converts the thyristor trigger pulse electrical signal into an optical signal, the output of the electro-optical conversion circuit is connected to a thyristor drive circuit through an optical fiber, the thyristor drive circuit converts the optical signal into a thyristor gate trigger current signal with power, and the output end of the thyristor drive circuit is connected with a thyristor gate in the magnetic valve type controllable reactor;
the auxiliary power supply supplies power for the compact RIO controller, the electro-optical conversion circuit and the thyristor drive circuit.
The invention is developed based on an embedded controller compact RIO and a graphical programming language Labview, is used for digital control and state quantity observation of the magnetic valve type controllable reactor, and realizes safe operation, control performance optimization and state monitoring of the magnetic valve type controllable reactor.
The invention realizes electrical isolation by transmitting the thyristor driving signal through the optical fiber and has strong anti-interference performance.
Furthermore, the magnetic valve type controllable reactor is connected with a three-phase power grid.
Furthermore, the upper computer with the Labview platform is a computer provided with the Labview, a man-machine interaction interface is directly compiled through Labview graphical programming, and data communication, data and waveform display and control instruction issuing of the real-time controller and the upper computer are realized.
Furthermore, the analog input module and the digital I/O interface module are installed in a slot of the integrated controller.
Furthermore, the FPGA is connected with the real-time controller through an internal PCI interface.
Further, the outputs of the voltage transformer, the current transformer and the optical fiber temperature sensor are collected by the analog input module and are sent to the FPGA for data calculation and processing.
Furthermore, the FPGA transmits the calculated and processed data to the real-time controller for display, the real-time controller receives an instruction signal of the upper computer and issues the instruction signal to the FPGA, and the FPGA completes all control algorithms of the magnetic valve type controllable reactor and generates thyristor trigger pulses.
Further, the digital I/O interface module sends out thyristor trigger pulses through a shielding wire, and drives the 3-pair rectifier thyristor of the magnetic valve type controllable reactor after optical coupling isolation.
Furthermore, the real-time controller mainly receives and executes a reactive instruction sent by an upper computer, calculates a trigger angle, an open-loop/closed-loop control instruction, a control program starting/stopping instruction and displays voltage, current waveforms and working states; the FPGA mainly executes sampling of state variables of the voltage, the current and the iron core temperature of a power grid, effective value calculation, instantaneous reactive power calculation, phase locking, reactive power control, trigger pulse generation and protection; the I/O interface module is mainly responsible for sending the acquired state variable signal into the FPGA and outputting the thyristor trigger pulse generated by the FPGA to the electro-optical conversion circuit; the I/O interface module is directly connected with the FPGA through an interface circuit and interacts data, and the FPGA and the real-time controller perform data transmission through two modes of polling and DMA FIFO.
The invention also adopts the following technical scheme: the measurement and control method by using the measurement and control system comprises the following steps:
the first step is as follows: powering on the whole measurement and control system, and carrying out system self-check;
the second step is that: initializing test system parameters;
the third step: the method comprises the steps that three-phase working voltage signals output by a voltage transformer, current signals output by a current transformer and iron core temperature signals output by an optical fiber temperature sensor are collected in a parallel processing mode through an analog input module;
the fourth step: transmitting the collected voltage signal, current signal and temperature signal from the FPGA to a real-time controller in a DMA FIFO mode, and transmitting the voltage signal, current signal and temperature signal to a human-computer interaction interface of an upper computer with a Labview platform through Ethernet for displaying and storing; calculating effective values of the voltage and current signals for control and protection;
the fifth step: comparing instantaneous values of voltage and current, effective values of voltage and current and temperature values with set threshold values in the FPGA, if the instantaneous values, the effective values and the temperature values are within a normal range, turning on an indicator lamp with normal working conditions positioned on a man-machine interaction interface of an upper computer, pressing a start-stop button of the man-machine interaction interface at the moment, and continuing to execute subsequent programs; if the current is not in the normal range, immediately executing a protection program, and blocking and outputting the trigger pulse of the thyristor;
and a sixth step: executing a phase locking program in the FPGA;
the seventh step: judging whether the phase locking result is accurate or not; if the result is accurate, continuing to execute the eighth step; if not, immediately executing a protection program to block and output the trigger pulse of the thyristor;
eighth step: issuing a control program starting or stopping instruction through an upper computer; if the command is a starting command, the ninth step is continuously executed; if the instruction is a stop instruction, returning to execute the third step;
the ninth step: issuing an open-loop or closed-loop control instruction through an upper computer; if the command is an open-loop control command, the system works in an open-loop state; if the command is a closed-loop control command, the system works in a closed-loop state;
the tenth step: if the ninth step is an open-loop control instruction, issuing a reactive instruction through an upper computer; if the ninth step is a closed-loop control instruction, calculating the reactive power in the current power grid, and calculating the reactive power to be output by the MCR according to a given reactive power reference value;
the eleventh step: calculating a trigger angle of the thyristor;
the twelfth step: judging the size of the trigger angle, and if the calculated trigger angle is within the normal range, continuing to execute the thirteenth step; otherwise, executing a protection program immediately, and blocking and outputting the trigger pulse of the thyristor;
the thirteenth step: generating thyristor trigger pulses according to the calculated thyristor trigger angles and the grid voltage synchronous signals obtained by the phase-locking algorithm; the thyristor trigger pulse is output through the digital I/O interface module, is converted into an optical signal through the electro-optical conversion circuit and then is transmitted through an optical fiber, and is converted into a current signal with driving capability after being transmitted to the thyristor driving circuit, so that a thyristor in the magnetic valve type controllable reactor is driven to work, and the magnetic valve type controllable reactor outputs specified reactive power;
and after the thirteenth step is executed, continuing to execute the third step to form a main cycle program, and continuously working the measurement and control system.
The invention has the following beneficial effects:
1. the magnetic valve type controllable reactor measurement and control system adopting the compact RIO platform simplifies the design link of a hardware circuit, accelerates the development speed of the control system and shortens the development period.
2. An upper computer is not required to be independently developed, and a man-machine interaction interface is directly compiled on the upper computer when Labview programming is used, so that the functions of data display and instruction issuing are realized;
3. the magnetic valve type controllable reactor state quantity can be comprehensively displayed, the instantaneous value and the waveform of the state quantity are displayed and recorded besides the effective value of the state quantity, data can be recorded and displayed for a long time through a waveform chart in Labview without using a wave recorder, operation and maintenance personnel of a transformer substation can conveniently debug and maintain the equipment, the data can also be exported, and later-stage data processing and scientific research analysis are facilitated.
Drawings
FIG. 1 is a block diagram of a magnetic valve type controllable reactor measurement and control system based on compactRIO;
FIG. 2 is a block diagram of a CompactRIO controller according to the present invention and the corresponding functional diagram;
FIG. 3 is a measurement and control flow chart of the magnetic valve type controllable reactor measurement and control system based on compactRIO.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings. It should be understood by those skilled in the art that the examples described are only for the aid of understanding the present invention and should not be construed as specifically limiting the present invention.
The magnetic valve type controllable reactor measurement and control system based on CompactRIO shown in fig. 1 is composed of an upper computer 1 with a Labview platform, a CompactRIO controller 2, a voltage transformer 3, a current transformer 4, an optical fiber temperature sensor 5, an electro-optical conversion circuit 6, a thyristor drive circuit 7, an auxiliary power supply 8 and a magnetic valve type controllable reactor 9.
The compact RIO controller 2 consists of an integrated controller, an analog input module and a digital I/O interface module, wherein the integrated controller comprises a real-time controller and an FPGA. The analog input module and the digital I/O interface module are installed in a slot of the integrated controller. The FPGA is connected with the real-time controller through an internal PCI interface.
The upper computer 1 with the Labview platform is connected with the real-time controller through the Ethernet, so that data transmission between the upper computer 1 with the Labview platform and the real-time controller is realized; the analog input module transmits the acquired analog signal to the FPGA; and the FPGA transmits the generated digital pulse signal to the digital I/O interface module for output.
The input ends of the voltage transformer 3 and the current transformer 4 are connected with the magnetic valve type controllable reactor 9 and are used for measuring the working voltage and the working current of the magnetic valve type controllable reactor 9; the output ends of the voltage transformer 3 and the current transformer 4 are connected with the input end of the analog quantity input module, and the collected working voltage and working current of the magnetic valve type controllable reactor 9 are transmitted to the analog quantity input module; the optical fiber temperature sensor 5 is placed in an iron core of the magnetic valve type controllable reactor 9, measures and collects the temperature of the iron core, and transmits the temperature to the analog quantity input module; the output of the digital I/O interface module is connected to the input of an electro-optical conversion circuit 6 through a shielded wire, and converts the trigger pulse electrical signal into an optical signal, the output of the electro-optical conversion circuit 6 is connected to a thyristor drive circuit 7 through an optical fiber, the thyristor drive circuit 7 converts the optical signal into a thyristor gate trigger current signal with power, the output end of the thyristor drive circuit 7 is connected with a thyristor gate in the magnetic valve type controllable reactor 9, and the magnetic valve type controllable reactor 9 is connected with a three-phase power grid.
The auxiliary power supply 8 supplies power to the CompactRIO controller 2, the electro-optical conversion circuit 6 and the thyristor drive circuit 7.
The upper computer 1 with the Labview platform is a computer provided with the Labview, a man-machine interaction interface is directly compiled through Labview graphical programming, and data communication, data and waveform display and control instruction issuing of the real-time controller and the upper computer are realized.
And the outputs of the voltage transformer 3, the current transformer 4 and the optical fiber temperature sensor 5 are collected by an analog input module and are sent to the FPGA for data calculation and processing. The FPGA transmits the calculated and processed data to the real-time controller for display, the real-time controller receives an instruction signal of the upper computer and issues the instruction signal to the FPGA, and the FPGA completes all control algorithms of the magnetic valve type controllable electric reactor 9 and generates thyristor trigger pulses. The digital I/O interface module sends out the trigger pulse of the thyristor through a shielding wire, and drives the 3 rectifying thyristors of the magnetic valve type controllable reactor 9 after optical coupling isolation.
The real-time controller is mainly used for receiving and executing a reactive instruction sent by an upper computer, calculating a trigger angle, an open-loop/closed-loop control instruction, a control program starting/stopping instruction and displaying voltage, current waveform and working state; the FPGA mainly executes sampling of state variables of the voltage, the current and the iron core temperature of a power grid, effective value calculation, instantaneous reactive power calculation, phase locking, trigger pulse generation and protection; the I/O interface module is mainly responsible for sending the acquired state variable signal into the FPGA and outputting the thyristor trigger pulse generated by the FPGA to the electro-optical conversion circuit; the I/O interface module is directly connected with the FPGA through an interface circuit and interacts data, and the FPGA and the real-time controller perform data transmission through two modes of polling and DMA FIFO.
The specific implementation steps of the measurement and control system are shown in fig. 3, and are described as follows:
the first step is as follows: and electrifying the whole measurement and control system, and performing system self-inspection.
The second step is that: and initializing test system parameters.
The third step: the analog input module is used for acquiring a three-phase working voltage signal output by the voltage transformer, a current signal output by the current transformer and an iron core temperature signal output by the optical fiber temperature sensor in a parallel processing mode.
The fourth step: transmitting the collected voltage signal, current signal and temperature signal from the FPGA to a real-time controller in a DMA FIFO mode, and transmitting the voltage signal, current signal and temperature signal to a human-computer interaction interface of an upper computer with a Labview platform through Ethernet for displaying and storing; and meanwhile, effective values of the voltage and current signals are calculated for control and protection.
The fifth step: comparing instantaneous values of voltage and current, effective values of voltage and current and temperature values with set threshold values in the FPGA, if the instantaneous values, the effective values and the temperature values are within a normal range, turning on an indicator lamp with normal working conditions positioned on a man-machine interaction interface of an upper computer, pressing a start-stop button of the man-machine interaction interface at the moment, and continuing to execute subsequent programs; if not, a protection program is immediately executed to block and output the thyristor trigger pulse.
And a sixth step: a phase locking procedure is performed in the FPGA.
The seventh step: and judging whether the phase locking result is accurate or not. If the result is accurate, continuing to execute the eighth step; if not, a protection program is executed immediately to block and output the trigger pulse of the thyristor.
Eighth step: and issuing a control program starting or stopping instruction through the upper computer. If the command is a starting command, the ninth step is continuously executed; if the instruction is a stop instruction, returning to execute the third step.
The ninth step: and issuing an open-loop or closed-loop control instruction through the upper computer. If the command is an open-loop control command, the system works in an open-loop state; if the command is a closed-loop control command, the system works in a closed-loop state.
The tenth step: if the ninth step is an open-loop control instruction, issuing a reactive instruction through an upper computer; and if the ninth step is a closed-loop control instruction, calculating the reactive power in the current power grid, and calculating the reactive power to be output by the MCR according to a given reactive power reference value.
The eleventh step: and calculating the trigger angle of the thyristor.
The twelfth step: judging the size of the trigger angle, and if the calculated trigger angle is within the normal range, continuing to execute the thirteenth step; otherwise, executing protection program immediately and blocking the output thyristor trigger pulse.
The thirteenth step: generating thyristor trigger pulses according to the calculated thyristor trigger angles and the grid voltage synchronous signals obtained by the phase-locking algorithm; the thyristor trigger pulse is output through the digital I/O interface module, is converted into an optical signal through the electro-optical conversion circuit and then is transmitted through the optical fiber, and is converted into a current signal with driving capability after being transmitted to the thyristor driving circuit, so that the thyristor in the magnetic valve type controllable reactor is driven to work, and the magnetic valve type controllable reactor outputs specified reactive power.
And after the thirteenth step is executed, continuing to execute the third step, continuing to execute the sampling program to form a main cycle program, and continuously working the measurement and control system.
The working process and the working principle of the invention are as follows:
the magnetic valve type controllable reactor (MCR) adjusts the triggering angle of the thyristor to adjust the reactive capacity of the power grid. Firstly, the grid voltage fundamental phase needs to be obtained as a synchronization signal: after the three-phase alternating-current voltage at the power grid side of the MCR is converted by a secondary side voltage transformer of the power system, the three-phase alternating-current voltage is collected by an analog input module in the measurement and control system and is sent to the FPGA and the real-time controller, and the FPGA executes a phase-locking algorithm to obtain a power grid voltage synchronous signal as a phase reference of a thyristor trigger signal.
And secondly, calculating the trigger angle of the MCR thyristor according to the control target and the control strategy of the MCR. If the control target is the reactive power control of the MCR, the working voltage and the working current of the MCR are sampled by a voltage transformer and a current transformer, then are collected by an analog input module in the measurement and control system, and are sent to the FPGA. The reactive control instruction is given by the upper computer and is issued to the FPGA through the real-time controller. The FPGA calculates the reactive power according to the working voltage and the working current of the MCR, generates a trigger angle through a set reactive power control strategy, generates a trigger pulse by combining a synchronous signal obtained in a phase-locking link and outputs the trigger pulse by a digital I/O interface module. The output of NI9401 is connected to the thyristor drive board through a shielding wire and optical coupling isolation to control the turn-on of the thyristor.
The real-time controller is connected with the upper computer through a network cable. And the upper computer realizes the display of the state variables and the receiving of the control instructions. The state variables such as voltage, current, temperature and the like collected by the measurement and control system are processed and analyzed by data in the FPGA and then transmitted to an upper computer by a real-time controller, so that the instantaneous values, effective values, reactive power average values, iron core temperature and the like of the voltage and current waveforms of the power grid are displayed in real time. In addition, the upper computer receives a given instruction from a human, and issues the instruction through the real-time controller. The compact RIO can execute parallel operation, so that the functions of signal acquisition, control algorithm, overcurrent protection, state display and the like can be simultaneously executed, the time required by the operation of a control program is greatly reduced, and the response speed is accelerated.
The Labview and the waveform chart control therein can not only display the waveform, but also store the long-time waveform data, so that the measurement and control system of the invention can not only avoid hanging the oscilloscope in a strong electric system, but also replace a wave recorder to realize the wave recording function, thereby reducing the cost of the system. Researchers can also derive waveform data stored in Labview, and later-stage scientific research and data processing are facilitated. Due to the fact that graphical programming is adopted by the Labview, the visualization degree is high, development difficulty can be reduced when a measurement and control system is developed, the development period is shortened, and labor cost is reduced.
The foregoing embodiments have described some of the details of the present invention, but are not to be construed as limiting the invention, and those skilled in the art may make variations, modifications, substitutions and alterations herein without departing from the principles and spirit of the invention.
Claims (9)
1. The measurement and control method of the magnetic valve type controllable reactor measurement and control system based on compact RIO is characterized in that the magnetic valve type controllable reactor measurement and control system comprises an upper computer (1) with a Labview platform, a compact RIO controller (2), a voltage transformer (3), a current transformer (4), an optical fiber temperature sensor (5), an electro-optical conversion circuit (6), a thyristor drive circuit (7), an auxiliary power supply (8) and a magnetic valve type controllable reactor (9);
the compact RIO controller (2) comprises an integrated controller, an analog input module and a digital I/O interface module, wherein the integrated controller comprises a real-time controller and an FPGA; the upper computer (1) with the Labview platform is connected with the real-time controller through the Ethernet, so that data transmission between the upper computer (1) with the Labview platform and the real-time controller is realized; the analog input module transmits the acquired analog signal to the FPGA; the FPGA transmits the generated digital pulse signal to a digital I/O interface module for output;
the input ends of the voltage transformer (3) and the current transformer (4) are connected with the magnetic valve type controllable reactor (9) and are used for measuring the working voltage and the working current of the magnetic valve type controllable reactor (9); the output ends of the voltage transformer (3) and the current transformer (4) are connected with the input end of the analog quantity input module, and the collected working voltage and working current of the magnetic valve type controllable reactor (9) are transmitted to the analog quantity input module; the optical fiber temperature sensor (5) is arranged in an iron core of the magnetic valve type controllable reactor (9), measures and collects the temperature of the iron core, and transmits the temperature to the analog quantity input module; the output of the digital I/O interface module is connected to the input of an electro-optical conversion circuit (6) through a shielded wire and converts a thyristor trigger pulse electrical signal into an optical signal, the output of the electro-optical conversion circuit (6) is connected to a thyristor drive circuit (7) through an optical fiber, the thyristor drive circuit (7) converts the optical signal into a thyristor gate trigger current signal with power, and the output end of the thyristor drive circuit (7) is connected with a thyristor gate in the magnetic valve type controllable reactor (9);
the auxiliary power supply (8) supplies power to the compact RIO controller (2), the electro-optical conversion circuit (6) and the thyristor drive circuit (7);
the measurement and control method by using the measurement and control system comprises the following steps:
the first step is as follows: powering on the whole measurement and control system, and carrying out system self-check;
the second step is that: initializing test system parameters;
the third step: the method comprises the steps that three-phase working voltage signals output by a voltage transformer, current signals output by a current transformer and iron core temperature signals output by an optical fiber temperature sensor are collected in a parallel processing mode through an analog input module;
the fourth step: transmitting the collected voltage signal, current signal and temperature signal from the FPGA to a real-time controller in a DMA FIFO mode, and transmitting the voltage signal, current signal and temperature signal to a human-computer interaction interface of an upper computer with a Labview platform through Ethernet for displaying and storing; meanwhile, calculating the effective values of the voltage and current signals for control and protection;
the fifth step: comparing instantaneous values of voltage and current, effective values of voltage and current and temperature values with set threshold values in the FPGA, if the instantaneous values, the effective values and the temperature values are within a normal range, turning on an indicator lamp with normal working conditions positioned on a man-machine interaction interface of an upper computer, pressing a start-stop button of the man-machine interaction interface at the moment, and continuing to execute subsequent programs; if the current is not in the normal range, immediately executing a protection program, and blocking and outputting the trigger pulse of the thyristor;
and a sixth step: executing a phase locking program in the FPGA;
the seventh step: judging whether the phase locking result is accurate or not; if the result is accurate, continuing to execute the eighth step; if not, immediately executing a protection program to block and output the trigger pulse of the thyristor;
eighth step: issuing a control program starting or stopping instruction through an upper computer; if the command is a starting command, the ninth step is continuously executed; if the instruction is a stop instruction, returning to execute the third step;
the ninth step: issuing an open-loop or closed-loop control instruction through an upper computer; if the command is an open-loop control command, the system works in an open-loop state; if the command is a closed-loop control command, the system works in a closed-loop state;
the tenth step: if the ninth step is an open-loop control instruction, issuing a reactive instruction through an upper computer; if the ninth step is a closed-loop control instruction, calculating the reactive power in the current power grid, and calculating the reactive power to be output by the MCR according to a given reactive power reference value;
the eleventh step: calculating a trigger angle of the thyristor;
the twelfth step: judging the size of the trigger angle, and if the calculated trigger angle is within the normal range, continuing to execute the thirteenth step; otherwise, executing a protection program immediately, and blocking and outputting the trigger pulse of the thyristor;
the thirteenth step: generating thyristor trigger pulses according to the calculated thyristor trigger angles and the grid voltage synchronous signals obtained by the phase-locking algorithm; the thyristor trigger pulse is output through the digital I/O interface module, is converted into an optical signal through the electro-optical conversion circuit and then is transmitted through an optical fiber, and is converted into a current signal with driving capability after being transmitted to the thyristor driving circuit, so that a thyristor in the magnetic valve type controllable reactor is driven to work, and the magnetic valve type controllable reactor outputs specified reactive power;
and after the thirteenth step is executed, continuing to execute the third step, continuing to execute the sampling program to form a main cycle program, and continuously working the measurement and control system.
2. The measurement and control method according to claim 1, characterized in that the magnetic valve type controllable reactor (9) is connected with a three-phase power grid.
3. The measurement and control method according to claim 1 or 2, characterized in that the upper computer (1) with the Labview platform is a computer equipped with Labview, and a man-machine interaction interface is directly programmed through Labview graphical programming, so that data communication, data and waveform display and control instruction issuing between the real-time controller and the upper computer are realized.
4. The measurement and control method according to claim 1 or 2, wherein the analog input module and the digital I/O interface module are installed in a slot of the integrated controller.
5. The measurement and control method according to claim 1 or 2, wherein the FPGA is connected with the real-time controller through an internal PCI interface.
6. The measurement and control method according to claim 5, characterized in that the outputs of the voltage transformer (3), the current transformer (4) and the optical fiber temperature sensor (5) are collected by an analog input module and sent to the FPGA for data calculation and processing.
7. The measurement and control method according to claim 6, characterized in that the FPGA transmits the calculated and processed data to a real-time controller for display, the real-time controller receives an instruction signal from an upper computer and issues the instruction signal to the FPGA, and the FPGA completes all control algorithms of the magnetic valve type controllable electric reactor (9) to generate thyristor trigger pulses.
8. The measurement and control method according to claim 7, characterized in that the digital I/O interface module sends out thyristor trigger pulses through a shielded wire, and drives 3 rectifiers of the magnetic valve type controllable reactor (9) after optical coupling isolation.
9. The measurement and control method according to claim 6, wherein the real-time controller mainly receives and executes a reactive instruction, a calculation trigger angle, an open-loop/closed-loop control instruction, a control program start/stop instruction and a display voltage, current waveform and working state, which are transmitted by an upper computer; the FPGA mainly executes sampling of state variables of the voltage, the current and the iron core temperature of a power grid, effective value calculation, instantaneous reactive power calculation, phase locking, reactive power control, trigger pulse generation and protection; the I/O interface module is mainly responsible for sending the acquired state variable signal into the FPGA and outputting the thyristor trigger pulse generated by the FPGA to the electro-optical conversion circuit; the I/O interface module is directly connected with the FPGA through an interface circuit and interacts data, and the FPGA and the real-time controller perform data transmission through two modes of polling and DMA FIFO.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910424569.3A CN110231787B (en) | 2019-05-21 | 2019-05-21 | Compact RIO-based magnetic valve type controllable reactor measurement and control system and measurement and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910424569.3A CN110231787B (en) | 2019-05-21 | 2019-05-21 | Compact RIO-based magnetic valve type controllable reactor measurement and control system and measurement and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110231787A CN110231787A (en) | 2019-09-13 |
| CN110231787B true CN110231787B (en) | 2021-01-05 |
Family
ID=67861426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910424569.3A Active CN110231787B (en) | 2019-05-21 | 2019-05-21 | Compact RIO-based magnetic valve type controllable reactor measurement and control system and measurement and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110231787B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113934243B (en) * | 2021-10-11 | 2022-05-31 | 上海希形科技有限公司 | Temperature equalization control method and system for parallel thyristors |
| CN114296339A (en) * | 2021-12-30 | 2022-04-08 | 中国科学院合肥物质科学研究院 | Control system and method for adjusting secondary current of superconducting transformer |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107534294A (en) * | 2014-12-30 | 2018-01-02 | 弗莱斯金电力系统公司 | With active and Reactive Power Control transient power stabilization equipment |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6081601A (en) * | 1983-10-11 | 1985-05-09 | Toshiba Corp | Testing device |
| CN2263411Y (en) * | 1995-09-19 | 1997-09-24 | 武汉水利电力大学 | Magnetic valve type controlled reactor |
| CN100337379C (en) * | 2005-11-17 | 2007-09-12 | 上海思源电气股份有限公司 | Voltage reactive power integrated control device based on magnetic control reactor |
| CN202487384U (en) * | 2012-03-22 | 2012-10-10 | 山东电力集团公司济南供电公司 | Magnetic valve type controllable reactor |
| CN104868483B (en) * | 2015-05-22 | 2017-07-14 | 江苏科技大学 | A kind of magnet controlled reactor control method and system based on DSP |
| CN108845201A (en) * | 2018-06-08 | 2018-11-20 | 国网浙江省电力有限公司电力科学研究院 | Magnetic valve type controllable reactor and its Energizing unit operating state monitoring system and method |
| CN108593138A (en) * | 2018-06-08 | 2018-09-28 | 杭州柯林电气股份有限公司 | The temp measuring system and temp measuring method of magnetic control type paralleling reactor inner-core magnet valve |
| CN108988354A (en) * | 2018-09-11 | 2018-12-11 | 国网山东省电力公司莱芜供电公司 | A kind of reactive compensation control system and method based on magnet controlled reactor |
-
2019
- 2019-05-21 CN CN201910424569.3A patent/CN110231787B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107534294A (en) * | 2014-12-30 | 2018-01-02 | 弗莱斯金电力系统公司 | With active and Reactive Power Control transient power stabilization equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110231787A (en) | 2019-09-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110231787B (en) | Compact RIO-based magnetic valve type controllable reactor measurement and control system and measurement and control method | |
| CN102158100B (en) | Triphase variable-frequency power supply with high power and operating method thereof | |
| CN106597142B (en) | A kind of automatic testing equipment of SVG power module | |
| CN103592554B (en) | A kind of 35kV high-voltage parallel capacitor on-line monitoring system and method | |
| CN207689566U (en) | A kind of broadband electromagnetic transient overvoltage sampling apparatus | |
| CN103812354A (en) | Broadband strong current generator power supply | |
| CN203422447U (en) | Alternating current withstanding voltage and oscillatory wave partial discharge test device for cable | |
| US20130187663A1 (en) | Low-voltage testing device for high-voltage frequency converter of serial superposition voltage type | |
| Liu et al. | High-voltage repetition-frequency charging power supply for pulsed laser | |
| CN203299264U (en) | Overvoltage on-line monitor system | |
| CN107656122B (en) | Transient current measuring device | |
| CN203243056U (en) | High/middle-voltage reactive compensation composite structure | |
| CN105070334B (en) | A method of judging that control rod drive mechanism acts based on curent change | |
| CN106772201B (en) | Transient characteristic detection test system and control method for electronic transformer | |
| CN112540292B (en) | Circuit breaker action frequency counting device and method | |
| CN109030950A (en) | A kind of impedance scan method and system for power electronic equipment | |
| CN116667537A (en) | Electric energy quality monitoring device | |
| CN216434228U (en) | Novel open source test platform for direct current boost converter | |
| CN110007145B (en) | Resonance point detection method based on constant voltage source converter and voltage current phase difference | |
| CN203025313U (en) | High-voltage variable-frequency series resonance test power supply | |
| CN203761271U (en) | Broadband current-boosting device power supply | |
| CN111221263A (en) | Semi-physical simulation system for offshore full-power wind power converter | |
| CN201359634Y (en) | Integral intelligent debugging device for excitation equipment | |
| CN207965076U (en) | A kind of power supply system AC circuit breaker acting characteristic on-line monitoring analytical equipment | |
| Wang et al. | Analysis of lightning-induced overvoltage waveform parameters |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |