CN216792776U - Electric power measurement and control device platform based on TSN backplate bus - Google Patents
Electric power measurement and control device platform based on TSN backplate bus Download PDFInfo
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- CN216792776U CN216792776U CN202123418168.9U CN202123418168U CN216792776U CN 216792776 U CN216792776 U CN 216792776U CN 202123418168 U CN202123418168 U CN 202123418168U CN 216792776 U CN216792776 U CN 216792776U
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Abstract
The utility model discloses an electric power measurement and control device platform based on a TSN (Serial transmission network) backplane bus, relates to the technical field of electric power measurement and control, and aims to solve the existing problems. An analog quantity IO board, a digital quantity IO board, a communication board and other function board cards are arranged on one side of the main control board, embedded CPU subsystems are contained in the main control board, the analog quantity IO board, the digital quantity IO board, the communication board and the other function board cards, a back board is arranged at the front ends of the analog quantity IO board, the digital quantity IO board, the communication board and the other function board cards on one side of the main control board, and a switch board is arranged at the front ends of the back boards; according to the power measurement and control device platform based on the TSN backplane bus, the TSN is used as the backplane bus of the power measurement and control device, the device cost is reduced, the system general type and expandability of the Ethernet are strong, the gating mechanism of the TSN is realized based on a fully synchronous full network clock, two time synchronization mechanisms are adopted, quick time synchronization and mutual backup of the system clock are realized, and the scheduling methods of a multi-priority queue and a gating strategy ensure the end-to-end delay certainty of the system clock from sending to receiving.
Description
Technical Field
The utility model relates to the technical field of electric power measurement and control, in particular to an electric power measurement and control device platform based on a TSN (Serial transmission network) backplane bus.
Background
The modern power system measurement and control device with complex power measurement and control functions is generally composed of a plurality of functional board cards, the device can be divided into a main control board, an analog quantity IO board, a switching quantity IO board, a communication board, a power supply board and the like according to functions of the modern power system measurement and control device.
The standard industrial bus is divided into a high-speed bus and a low-speed bus, the high-speed bus such as PCI/PCIe has higher hardware cost, and generally adopts a mapping mode based on a memory, the use of the high-speed bus in a power measurement and control scene is more complicated, and the low-speed bus such as RS422/485 and CAN and the like cannot meet the transmission bandwidth of a large amount of measurement and control data. At present, the measurement and control protection platform of a plurality of manufacturers adopts the FPGA to realize the self-defined backplane bus, and has the defects of high customization degree and poor compatibility, and each board card needs to be added with an FPGA chip, so the cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a power measurement and control device platform based on a TSN (time series network) backplane bus, which aims to solve the problems that the background technology is high in customization degree and poor in compatibility, an FPGA (field programmable gate array) chip is required to be added to each board card, the cost is high, and deterministic message transmission cannot be realized through the traditional Ethernet backplane bus.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides an electric power measurement and control device platform based on TSN backplate bus, includes overall technical scheme, time synchronization scheme, scheduling and flow shaping scheme and communication path selection, reservation and fault-tolerant subassembly scheme, overall technical scheme includes main control board, each function integrated circuit board and backplate, the time synchronization scheme includes time synchronization and clock synchronization, scheduling and flow shaping scheme adopt a plurality of priority queues to realize the QoS transmission of different businesses, communication path selection, reservation and fault-tolerant subassembly scheme adopt two exchange integrated circuit boards to constitute redundant backplate exchange structure.
By adopting the technical scheme, the platform is formed by combining a plurality of measurement and control board cards, a Time Sensitive Network (TSN) is adopted as a high-speed backboard bus, interconnection and data interaction of all board card assemblies in the device are realized, and based on the device, the platform can develop series electric power automation secondary equipment such as electric power measurement and control, protection, fault recording and broadcasting, state monitoring and the like.
Furthermore, the CPUs of the main control board and the functional boards are provided with TSN ports, the switch board chip is a TSN switch chip, the backplane provides ethernet routing to form a star-type interconnection topology with the switch board as a center, and the main control board and the functional boards communicate through the switch board.
By adopting the technical scheme, the hardware cost of the whole device is reduced, the system general type and expandability based on the Ethernet are stronger, and the development and transplantation of application software are convenient.
Further, the clock synchronization adopts an IRIG-B code and IEEE 1588PTP protocol mutual backup mode to realize a time synchronization scheme of each measurement and control function board card.
By adopting the technical scheme, a B code timing scheme is preferentially selected, if a B code signal is lost, PTP timing is used, the scheme that a backboard synchronous clock signal and PTP are mutually standby is adopted for clock synchronization, the backboard synchronous clock signal is preferentially selected, and if the synchronous clock signal is lost, PTP adjustable clock is adopted for realizing clock synchronization.
Further, the GOOSE/SV packet in the scheduling and traffic shaping scheme is set to the highest priority, the higher priority is a packet of the device internal board state interaction and control command, and the lowest priority is a packet of the file transmission and firmware upgrade transmission.
By adopting the technical scheme, the priority can be further refined according to the number of queues supported by the TSN, a time slice scheduling strategy based on gating is adopted, the gating strategy is pre-configured in advance according to the communication requirement of each functional board card, and dynamic adjustment can also be carried out according to the running mode of the device.
Furthermore, the two card changing boards serve as a master and a slave.
By adopting the technical scheme, the two board cards run in a hot standby mode, data exchange is preferentially realized through the main exchange board, and when the fault of the main exchange board is detected, the main exchange board is switched to the standby exchange board.
Compared with the prior art, the utility model has the beneficial effects that:
1. this electric power measurement and control device platform based on TSN backplate bus through adopting TSN as electric power measurement and control device's backplate bus, has reduced the hardware cost of whole device, satisfies the demand of real-time and reliable communication between each inside integrated circuit board, and the system universal type and the scalability based on ethernet are also stronger, and application software development transplants the convenience.
2. According to the power measurement and control device platform based on the TSN backplane bus, the TSN gating mechanism is realized based on the completely synchronous full-network clock, two time synchronization mechanisms are adopted, the rapid time synchronization and mutual backup of the system clock are realized, and the reliability of the operation of the device is further ensured.
3. The power measurement and control device platform based on the TSN backplane bus adopts a scheduling method based on a multi-priority queue and a gating strategy, reserves time slices for real-time messages such as GOOSE/SV and the like, and guarantees end-to-end delay certainty from sending to receiving.
Drawings
FIG. 1 is a block diagram of the overall system of the present invention;
FIG. 2 is a block diagram of a time synchronization scheme according to an aspect of the present invention;
FIG. 3 is a block diagram of a scheduling and traffic shaping scheme of the present invention;
fig. 4 is a block diagram of a communication path selection, reservation and fault tolerant component arrangement of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The embodiment of the utility model discloses a power measurement and control device platform based on a TSN (Serial peripheral network), the whole system is composed of a topological block diagram as shown in figure 1, the whole device is provided with a main control board, a plurality of functional board cards (including analog quantity and digital quantity IO boards) and a switching board, the main control board card and each functional board card comprise an embedded CPU subsystem, the CPU type selection supports a TSN port, the switching board chip is a TSN switching chip and supports 100/1000M two-layer forwarding, a passive back board in the device provides Ethernet routing, a star-shaped interconnection topology taking the switching board as the center is formed, and the main control board card and each functional board card communicate through the switching board.
As shown in fig. 2(a) and (B): the time synchronization method specifically comprises two parts of time synchronization and clock synchronization, wherein the time synchronization adopts an IRIG-B code and IEEE 1588PTP protocol mutual backup mode to realize a time synchronization scheme of each measurement and control function board card, the IRIG-B code mode needs to add RS-485 differential routing in a back plate, a main control plate outputs B code timing signals, other function board cards receive the B code timing signals, if a PTP mode is adopted, the main control plate is used as a PTP main clock, other function board cards are used as PTP slave clocks, the B code timing scheme is preferentially selected in a platform, if the B code signals are lost, PTP timing is adopted, the clock synchronization adopts a scheme of mutually backing plate synchronization clock signals and PTP, the back plate synchronization clock signals are preferentially selected, a high-precision clock generating circuit is installed on the main control plate, and reference frequency clock signals and second pulse signals are output as reference clocks of other function board cards, and frequency synchronization is realized, and if synchronous clock signals are lost, clock synchronization within 100ns of a clock can be realized by adopting a PTP adjustable clock.
As shown in fig. 3: the QoS transmission of different services is implemented by using multiple priority queues, which is typically configured as: the GOOSE/SV message is set as the highest priority, the board card state interaction and control command message in the device is set as the higher priority, and the file transmission and firmware upgrade transmission message is set as the lowest priority. If the TSN network card and the switch chip support more priority queues, the priority and queue mapping of different service messages can be further refined, when the TSN network port sends data packets in each queue, a time slice scheduling strategy based on gating is adopted, taking an AC acquisition board as an example, if 32 current/voltage values are acquired by each cycle, the time slice scheduling frequency can be set to be 1.6KHz, namely 625us cycle, the time cycle of the length is divided into a plurality of time slices, SV data are forwarded and acquired according to a gating table in a time-sharing manner, because the system reserves an analog quantity time slice in each fixed cycle and no other message is transmitted in the time slice, the isochronism and the certainty of the SV message transmission are ensured, the board card can only send SV messages at the time of T07 is shown in FIG. 3, the gating table of the system global situation can ensure that CPUs on other time also do not allow any message to be sent, the gating strategy is pre-configured in advance according to the communication requirements of each functional board card, and can also be dynamically adjusted according to the running mode of the device, and the gating strategy is uniformly configured and issued to the TSN network ports of the switching chip and other functional board cards by the main control board.
As shown in fig. 4: the platform mainly adopts two switching board cards to form a redundant backplane switching structure. The two exchange boards are in master-slave roles, and simultaneously run in hot standby mode, the CPU network port analog switch or the relay on the functional board card is switched to the corresponding exchange chip port, data exchange is preferentially realized through the main exchange board, when the fault of the main exchange board is detected through the port Link down fault or the timing heartbeat message, the TSN network port switching module switch or the relay is switched to the standby exchange board port, and the scheme needs two exchange boards and an additional switching circuit is added, so that the device cost is high, and the device can be used as an optional item.
The utility model provides an electric power measurement and control device platform based on TSN backplate bus, includes the main control board, its characterized in that: the main control board one side is equipped with analog quantity IO board, digital quantity IO board, communication board and other function integrated circuit boards, all contains embedded CPU subsystem in main control board, analog quantity IO board, digital quantity IO board, communication board and other function integrated circuit boards, and main control board one side is equipped with analog quantity IO board, digital quantity IO board, communication board and other function integrated circuit boards, and the main control board front end is equipped with the backplate, and the backplate front end is equipped with the exchange board.
Specifically, the main control board analog quantity IO board, the digital quantity IO board, the communication board and the CPU of other function board cards are all provided with the TSN net gape, and the exchange board chip is the TSN exchange chip, and the backplate provides the ethernet and walks the line, forms the star type interconnection topology that uses the exchange board as the center, and main control board analog quantity IO board, digital quantity IO board, communication board and other function board cards all communicate through the exchange board.
Specifically, the master control board, the analog quantity IO board, the digital quantity IO board, the communication board and other functional board cards are electrically connected with a time synchronization module, the time synchronization module is a time synchronization scheme, and the time synchronization scheme comprises time synchronization and clock synchronization.
Specifically, the master control board, the analog quantity IO board, the digital quantity IO board, the communication board and other function board cards adopt a gate control strategy, the gate control strategy is configured according to communication requirements of the master control board, the analog quantity IO board, the digital quantity IO board, the communication board and other function board cards, and dynamic adjustment is performed according to an operation mode.
Specifically, two exchange boards are provided, and the two exchange boards serve as a master and a slave.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (5)
1. The utility model provides an electric power measurement and control device platform based on TSN backplate bus, includes the main control board, its characterized in that: the intelligent integrated circuit board comprises a main control board and is characterized in that an analog quantity IO board, a digital quantity IO board, a communication board and other function board cards are arranged on one side of the main control board, embedded CPU subsystems are contained in the main control board, the analog quantity IO board, the digital quantity IO board, the communication board and the other function board cards are arranged on one side of the main control board, a back board is arranged at the front end of the main control board, and an exchange board is arranged at the front end of the back board.
2. The TSN backplane bus-based power measurement and control device platform of claim 1, wherein: the CPU of master control board analog quantity IO board, digital quantity IO board, communication board and other function integrated circuit boards all is provided with the TSN net gape, the exchange board chip is the TSN exchange chip, the backplate provides the ethernet and walks the line, forms the star type interconnection topology that uses the exchange board as the center, master control board analog quantity IO board, digital quantity IO board, communication board and other function integrated circuit boards all communicate through the exchange board.
3. The TSN backplane bus-based power measurement and control device platform of claim 1, wherein: the master control board, the analog quantity IO board, the digital quantity IO board, the communication board and other functional board cards are all electrically connected with a time synchronization module, the time synchronization module is a time synchronization scheme, and the time synchronization scheme comprises time synchronization and clock synchronization.
4. The TSN backplane bus-based power measurement and control device platform of claim 1, wherein: the main control board, the analog quantity IO board, the digital quantity IO board, the communication board and other function board cards adopt a gate control strategy, the gate control strategy is configured according to communication requirements of the main control board, the analog quantity IO board, the digital quantity IO board, the communication board and other function board cards, and dynamic adjustment is carried out according to an operation mode.
5. The TSN backplane bus-based power measurement and control device platform of claim 1, wherein: the number of the exchange plates is two, and the two exchange plates serve as a master and a slave.
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| CN202123418168.9U CN216792776U (en) | 2021-12-30 | 2021-12-30 | Electric power measurement and control device platform based on TSN backplate bus |
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| CN202123418168.9U CN216792776U (en) | 2021-12-30 | 2021-12-30 | Electric power measurement and control device platform based on TSN backplate bus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115001646A (en) * | 2022-08-01 | 2022-09-02 | 杭州加速科技有限公司 | Clock synchronization calibration method and device suitable for multiple board cards |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115001646A (en) * | 2022-08-01 | 2022-09-02 | 杭州加速科技有限公司 | Clock synchronization calibration method and device suitable for multiple board cards |
| CN115001646B (en) * | 2022-08-01 | 2022-11-18 | 杭州加速科技有限公司 | Clock synchronization calibration method and device suitable for multiple board cards |
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