CN106468889B - Semi-physical simulation platform for quick mechanical switch - Google Patents
Semi-physical simulation platform for quick mechanical switch Download PDFInfo
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- CN106468889B CN106468889B CN201610803555.9A CN201610803555A CN106468889B CN 106468889 B CN106468889 B CN 106468889B CN 201610803555 A CN201610803555 A CN 201610803555A CN 106468889 B CN106468889 B CN 106468889B
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 27
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Abstract
The invention relates to a rapid mechanical switch semi-physical simulation platform, which comprises a PC (personal computer) running simulation software and a rapid switch simulation device in communication connection with the PC; establishing a simulation model through the simulation software, wherein the simulation model comprises a rapid switch control protection strategy, a program module of a logic time sequence and a time-speed change curve of a switch contact displacement sensor; the rapid switch simulation device receives an opening/closing instruction from the rapid switch control protection device and transmits the opening/closing instruction to the PC; the simulation software generates simulation process data according to an opening/closing instruction, and the rapid simulation device receives the simulation process data, processes the simulation process data and forwards the simulation process data to the rapid switch control protection device. The simulation platform can meet the simulation requirement of state change of the high-speed mechanical switch simulator, and is low in cost and high in cost performance.
Description
Technical Field
The invention relates to a rapid mechanical switch semi-physical simulation platform, and belongs to the technical field of direct current breakers.
Background
The fast mechanical switch is an important component element in the direct current circuit breaker, the structure and the control protection logic of the fast mechanical switch are complex, and actual simulation is required before engineering application. A common tool used in power system simulation is an RTDS/RT-LAB digital simulator.
An RTDS/RT-LAB (real-time digital simulator) is a real-time all-digital electromagnetic transient power system simulator, can accurately simulate an AC/DC system in real time by using advanced software and hardware technologies, but is expensive and requires hundreds of thousands of dollars.
Disclosure of Invention
The invention aims to provide a quick mechanical switch semi-physical simulation platform, which is used for providing a novel practical simulation platform to solve the problem of high simulation cost of a quick mechanical switch.
In order to solve the technical problem, the invention provides a rapid mechanical switch semi-physical simulation platform, which comprises a PC (personal computer) running simulation software and a rapid switch simulation device in communication connection with the PC; establishing a simulation model through the simulation software, wherein the simulation model comprises a rapid switch control protection strategy, a program module of a logic time sequence and a time-speed change curve of a switch contact displacement sensor; the rapid switch simulation device receives an opening/closing instruction from a rapid switch control protection device and transmits the opening/closing instruction to the PC; the simulation software generates simulation process data according to an opening/closing instruction, and the rapid simulation device receives the simulation process data, processes the simulation process data and forwards the simulation process data to the rapid switch control protection device.
Further, the simulation software is PSCAD or MATLAB.
Further, the PC communicates with the fast switch simulation device through a serial port.
Further, the simulation process data comprises a switch state, a displacement curve, a current at two ends of the switch and a voltage of the coil driving circuit.
Furthermore, the rapid switch simulation device comprises a communication board, wherein the communication board is used for acquiring, analyzing, storing and sending the simulation process data sent by the PC; the simulation device further comprises a switch displacement output board, a voltage output board, a current output board, a recording playback board and a rapid IO board.
Further, the switch displacement output board receives the switch state information of the communication board and forwards the switch state information to the quick switch control protection device.
Further, the voltage output board receives the digital voltage quantity of the communication board, converts the digital voltage quantity into analog quantity and outputs the analog quantity to the fast switch control protection device; and the current output board receives the digital current quantity of the communication board, converts the digital current quantity into analog quantity and outputs the analog quantity to the quick switch control protection device.
Furthermore, the wave recording playback board is used for recording and playing back the simulation process data processed by the rapid simulation device.
Further, the fast IO board is configured to receive an opening/closing instruction of the fast switch control protection device, and forward the opening/closing instruction to the communication board.
Furthermore, the rapid switch simulation device further comprises a back plate, and the switch displacement output plate, the voltage output plate, the current output plate, the wave recording playback plate and the rapid IO plate are connected to the back plate and communicated with the communication plate through the back plate.
The invention has the beneficial effects that: the quick mechanical switch semi-physical simulation platform is characterized in that a simulation model is built through simulation software, simulation process data generated by the simulation model are sent to a quick switch simulation device, the quick switch simulation device sends the processed simulation process data to a quick switch control protection device, and finally the simulation effect is achieved. The simulation platform can meet the requirements of test users of large-scale mechanical switch control devices, expensive simulation equipment is not needed, and the simulation platform can be realized only by one computer and one quick switch simulation device, so that the cost is low, and the cost performance is high.
Drawings
FIG. 1 is a simulation platform system building block diagram;
FIG. 2 is a diagram of a fast switching emulation device configuration;
FIG. 3 is a diagram of a DC circuit breaker shutdown simulation process;
fig. 4 is a fast switching emulation device signaling.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
In this embodiment, the rapid mechanical switch semi-physical simulation platform system is composed of a computer or a server, and is installed with a PSCAD software + serial port communication module, a rapid switch simulation device, a rapid switch control protection device, and a computer monitoring background, and a simulation platform system building block diagram is shown in fig. 1. The computer PSCAD software is communicated with the quick switch simulation device through the serial port communication module, the quick switch control protection device sends a trigger signal and I/O information to the quick switch simulation device and receives voltage/current and I/O information from the quick switch simulation device, and the computer monitoring background is communicated with the quick switch control protection device through an RJ45 serial port. The PSCAD + serial port communication module and the rapid switch simulation device form a rapid mechanical switch semi-physical simulation platform together.
The following describes each device or module in the simulation platform system in further detail.
1. PSCAD + serial port communication module
The PSCAD is used as a relatively common power system simulation software, is an advanced power system steady-state and transient simulation tool, is suitable for theoretical simulation, and belongs to the prior art. In this embodiment, the PSCAD is mainly used to build a simulation model, but Matlab or other software capable of implementing the modeling function required in this embodiment may be used instead. The serial port communication module adopts VC and other tools to compile serial port communication functions on a Windows platform, and is mainly used for realizing serial communication between the PSCAD and the rapid switch simulation device. Of course, other communication interfaces may be used to exchange information between the PSCAD and the fast switch emulation device.
2. Quick switch simulator
The quick switch simulation device is a hardware part of a quick mechanical switch semi-physical simulation platform and comprises functional components such as a communication board, a switch displacement output board, a quick IO board, a voltage output board, a current output board and a recording playback board, wherein the functional components are shown in figure 2:
the communication board is used for managing and communicating the rapid switch simulation device, and analyzing serial port communication contents such as a switch state, a displacement curve, current at two ends of a switch, voltage of a coil driving circuit and the like downloaded from the PSCAD through interactive communication with the serial port communication module and storing the contents into the SD card; and meanwhile, the analyzed serial port communication content is transmitted to other components of the rapid switch simulation device in a classified manner through the backboard.
The switch displacement output board receives the switch state information from the communication board, communicates with the rapid switch control protection device through optical fibers, and sends the acceleration and deceleration displacement information of the switch contact to the rapid switch control protection device.
The voltage output board is responsible for receiving the digital voltage quantity of the communication board, converting the digital quantity into analog quantity and outputting the analog quantity to the voltage measurement board card of the rapid switch control protection device.
The current output board is responsible for receiving the digital current quantity of the communication board, converting the digital quantity into analog quantity and outputting the analog quantity to the current measuring board card of the quick switch control protection device.
The wave recording playback board is used for recording and playing back analog quantity signals such as voltage and current and switching value signals such as switching state signals, and provides basis for debugging and fault analysis.
The rapid IO board is used for receiving a rapid switch on-off signal of the rapid switch control protection device and sending the rapid switch on-off signal to the communication board through the backboard.
The back plate is responsible for signal transmission among functional components such as a communication board, a switch displacement output board, a fast IO board, a voltage output board, a current output board and a recording playback board.
Fig. 3 shows the signal transmission condition of the fast switch simulation apparatus, that is, the communication board receives the simulation process data such as the switch state, the displacement curve, the current at the two ends of the switch, the voltage of the coil driving circuit, and the like sent by the simulation software PC, and the communication board, the voltage output board, the current output board, the switch displacement output board, and the recording playback board realize information exchange through the back board.
The above is a concrete structure of the rapid switch simulation device, which is formed by a plurality of board cards. As another embodiment, other configurations may be adopted, such as one board card completing the functions of the above-mentioned board cards.
3. Fast switch control protection device and monitoring background
The fast switch control protection device and the monitoring background belong to a tested system and do not belong to a fast mechanical switch semi-physical simulation platform.
At present, a direct current circuit breaker in a high-voltage large-capacity flexible direct current transmission system is composed of three parts, namely a through current branch, a transfer branch and an MOV energy absorption branch. The through-flow branch circuit comprises a quick mechanical switch and a through-flow branch circuit IGBT module, and the transfer branch circuit comprises a plurality of transfer branch circuit IGBT modules. The rapid switching action period of the direct current breaker is short, and the current can be cut off within 3-5 ms. The invention provides a rapid mechanical switch semi-physical simulation platform designed for solving the simulation problem of a direct current breaker control protection device. The following description will be made of the technical process of the simulation platform by taking the semi-physical simulation of the fast mechanical switch in the dc circuit breaker as an example:
(1) the monitoring background issues an opening/closing command to the fast switch control protection device, the fast switch control protection device transmits the received opening/closing command to a fast IO board of the fast switch simulation device, the fast IO board forwards the opening/closing command to a communication board of the fast switch simulation device, and the communication board sends the opening/closing command to the simulation software PSCAD through a serial port.
(2) A simulation model is established by PSCAD, a program module of a rapid switch control protection strategy and a logic time sequence is compiled, a two-dimensional rapid mechanical switch displacement data memory is established, and the time-speed change curve of the switch contact displacement sensor is represented by data of the two-dimensional memory.
(3) Serial communication software functions are compiled on a Windows platform by using tools such as VC (virtual circuit interface) and the like, and simulation process data such as a switch state, a displacement curve, current at two ends of a switch, voltage of a coil driving circuit and the like are sent to a rapid switch simulation device by calling the serial communication software functions in PSCAD (power system computer aided design).
(4) The communication board of the rapid switch simulation device analyzes simulation process data downloaded from the PSCAD and stores the simulation process data into the SD card, and simultaneously sends the information of the switch state and the displacement curve to the switch displacement output board through the backboard, sends the current at two ends of the switch to the current output board, and sends the voltage of the coil driving circuit to the voltage output board.
(5) The switch displacement output board processes the received switch state and displacement curve to obtain the acceleration and deceleration displacement information of the switch contact, and sends the information to the rapid switch control protection device through the optical fiber; the voltage output board converts the received digital quantity voltage into analog quantity voltage and sends the analog quantity voltage to a voltage measurement board card of the rapid switch control protection device; the current output board converts the received digital quantity current into analog quantity current and sends the analog quantity current to a current measurement board card of the rapid switch control protection device; the wave recording playback board is used for recording and playing back the analog quantity voltage, the analog quantity current and the acceleration and deceleration displacement information of the switch contact.
(6) The rapid switch control protection device starts wave recording according to the switching action flow and change sent by the rapid switch simulation device, realizes communication with a computer monitoring background through an RJ45 serial port, reports event information, and finally realizes the function of testing the rapid mechanical switch.
Fig. 4 shows the action simulation process of the rapid mechanical switch opening of the direct current circuit breaker under the simulation platform. When a short-circuit fault occurs at the time t0, the direct-current circuit breaker starts to be disconnected when the short-circuit fault is detected at the time t1, the transfer branch IGBT of the direct-current circuit breaker is switched on at the time t2, the cocurrent branch IGBT is locked, the rapid mechanical switch starts to be disconnected at the time t3, the transfer branch IGBT is locked at the time t4, the energy absorption branch is switched on at the time t5, the fault current starts to be consumed, and the disconnection and disconnection of the direct-current circuit breaker are completed at the time t 6. The time period t0-t1 is fault detection time, the time period t1-t5 is direct current breaker cutoff time, and the time period t5-t6 is short-circuit energy dissipation time. When the breaker opening start time t1 is 0ms, as can be seen from fig. 4, the dc breaker transfer branch IGBT on time t2 is 0.1ms, the fast mechanical switch opening start time t3 is 0.3ms, the latch transfer branch IGBT time t4 is 2.8ms, and the energy absorption branch conduction time t5 is 3 ms.
In this embodiment, the communication frequency between the fast switch simulation device and the PSCAD model can be within 5ms, and the fast switch simulation device can receive enough data frames through fixed delay to complete corresponding action change output, thereby meeting the state change simulation requirement of the fast switch simulation device. In addition, the rapid mechanical switch semi-physical simulation platform in the embodiment has the advantages of low cost which is less than one tenth of that of an RTDS/RT-LAB digital simulator, high cost performance and capability of meeting the requirements of a large-scale mechanical switch control device test user.
Claims (10)
1. A quick mechanical switch semi-physical simulation platform is characterized in that the simulation platform comprises a PC running simulation software and a quick switch simulation device in communication connection with the PC; establishing a simulation model through the simulation software, wherein the simulation model comprises a rapid switch control protection strategy, a program module of a logic time sequence and a time-speed change curve of a switch contact displacement sensor; the rapid switch simulation device receives an opening/closing instruction from a rapid switch control protection device and transmits the opening/closing instruction to the PC; the simulation software generates simulation process data according to an opening/closing instruction, and the rapid switch simulation device receives the simulation process data, processes the simulation process data and forwards the simulation process data to the rapid switch control protection device;
the simulation platform is used for testing the rapid switch control protection device.
2. The semi-physical simulation platform for the fast mechanical switch according to claim 1, wherein the simulation software is PSCAD or MATLAB.
3. The semi-physical simulation platform for the fast mechanical switch according to claim 1, wherein the PC communicates with the fast switch simulation device through a serial port.
4. The semi-physical simulation platform for the fast mechanical switch according to claim 1, wherein the simulation process data comprises switch states, displacement curves, current across the switch, and coil drive circuit voltage.
5. The semi-physical simulation platform for the fast mechanical switch according to claim 4, wherein the fast mechanical switch simulation device comprises a communication board, and the communication board is used for acquiring, analyzing, storing and sending simulation process data sent by the PC; the rapid switch simulation device further comprises a switch displacement output plate, a voltage output plate, a current output plate, a recording playback plate and a rapid IO plate.
6. The rapid mechanical switch semi-physical simulation platform of claim 5, wherein the switch displacement output board receives switch state information of the communication board and forwards the switch state information to the rapid switch control protection device.
7. The semi-physical simulation platform for the fast mechanical switch according to claim 5, wherein the voltage output board receives the digital voltage quantity of the communication board, converts the digital voltage quantity into an analog quantity and outputs the analog quantity to the fast switch control protection device; and the current output board receives the digital current quantity of the communication board, converts the digital current quantity into analog quantity and outputs the analog quantity to the quick switch control protection device.
8. The semi-physical simulation platform for the fast mechanical switch according to claim 5, wherein the recording playback board is used for recording and playing back simulation process data processed by the fast switch simulation device.
9. The semi-physical simulation platform for the fast mechanical switch according to claim 5, wherein the fast IO board is used for receiving an opening/closing instruction of a fast switch control protection device and forwarding the opening/closing instruction to the communication board.
10. The semi-physical simulation platform for the fast mechanical switch according to claim 5, wherein the fast switch simulation device further comprises a back plate, and the switch displacement output board, the voltage output board, the current output board, the wave recording playback board and the fast IO board are connected to the back plate and communicate with the communication board through the back plate.
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| CN106950851B (en) * | 2017-03-15 | 2020-12-04 | 平高集团有限公司 | Thyristor simulation device and thyristor semi-physical simulation platform |
| CN108009322B (en) * | 2017-11-15 | 2021-11-16 | 中国电力科学研究院有限公司 | Multi-field coupling simulation calculation method and device for high-speed mechanical switch |
| CN109687437B (en) * | 2018-12-18 | 2020-08-11 | 国家电网有限公司 | Electrical simulation method of alternating current energy consumption device for flexible direct current transmission |
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