A relay protection and communication management integrated system for a new energy station

Abstract

This invention discloses an integrated relay protection and communication management system for new energy power plants, relating to the field of power grid protection and monitoring technology. It includes a power management module, a signal acquisition module, an execution module, a fault acquisition and protection processing module, and a communication management module. The power management module converts AC input to DC output. The signal acquisition module acquires analog and status signals. The fault acquisition and protection processing module performs protection logic operations and generates protection action signals when a fault occurs. The execution module sends control signals to external devices based on the protection action signals or user instructions. The external devices adjust accordingly to ensure safe operation. The communication management module communicates with the host computer and acquires data from the slave computer. This invention integrates relay protection and communication management, saving installation space at the power plant, reducing on-site configuration complexity, and improving the selectivity and flexibility of power plant equipment protection.

Description

Technical Field

[0001] This invention relates to the field of power grid protection and monitoring technology, and in particular to an integrated relay protection and communication management system for new energy power plants. Background Technology

[0002] Currently, with the world's increasing emphasis on a low-carbon economy, the energy structure is undergoing accelerated transformation, and the new energy industry is entering a period of rapid development. As important components of clean energy, photovoltaic and wind power have shown significant growth momentum in various application scenarios in recent years.

[0003] In new energy power plants, prefabricated substations are key nodes connecting power generation units to the power grid, and their protection devices and communication management units are core equipment in wind farms and photovoltaic power plants. Because prefabricated substations are typically deployed outdoors, in compact spaces with complex operating conditions, and far from the main control room, traditionally separately configured relay protection devices and communication management equipment suffer from complex wiring, difficult maintenance, and information silos, making it difficult to meet the needs of intelligent and remote operation and maintenance. Summary of the Invention

[0004] In view of this, the present invention provides an integrated relay protection and communication management system for new energy power plants. It is compatible with multiple functions through modular hardware integration, realizes hardware resource sharing, effectively reduces the complexity of on-site configuration, and is suitable for protection testing and operation and maintenance monitoring of smart grids, microgrids or energy storage systems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An integrated relay protection and communication management system for new energy power plants includes: a power management module, a signal acquisition module, an execution module, a fault acquisition and protection processing module, and a communication management module; The power management module is connected to the fault acquisition and protection processing module and the communication management module; the signal acquisition module is connected to the fault acquisition and protection processing module; the execution module is connected to the fault acquisition and protection processing module; the fault acquisition and protection processing module is connected to the communication management module; the signal acquisition module, the execution module, and the fault acquisition and protection processing module are all connected to external devices; and the communication management module is connected to the host computer and the slave computer. The power management module is used to convert AC input into multiple isolated DC outputs via AC / DC conversion circuitry; The signal acquisition module is used to acquire analog signals from external devices and to acquire status signals from external devices by setting multiple digital inputs; the analog signals include: voltage signals, current signals, temperature signals and AI signals; The fault acquisition and protection processing module is used to perform protection logic operations based on analog signals and status signals, generate protection action signals when external devices fail, and also to receive user commands. The execution module is used to send control signals to external devices based on protection action signals or user instructions. The external devices then adjust their actions according to the control signals to ensure safe operation. The communication management module is used for communication with the host computer and for collecting data from the slave computer.

[0006] The above system may optionally include: a hardware resource sharing module, which is connected to the power management module, signal acquisition module, execution module, fault acquisition and protection processing module and communication management module respectively, and adopts a dual DSP structure.

[0007] In the above system, optionally, the hardware resource sharing module includes a peripheral resource sharing unit, a memory resource sharing unit, and a power management sharing unit, which are respectively connected to the DSP; the power management sharing unit is used to monitor the voltage status of the DSP through a power monitoring circuit.

[0008] In the above system, optionally, the power management module adopts a redundant power supply design.

[0009] In the above system, optionally, the signal acquisition module includes a synchronous sampling unit, a digital filtering unit, and a protection algorithm unit connected in sequence; The synchronous sampling unit is used to acquire analog signals and status signals; The digital filtering unit is used to filter analog signals and status signals to obtain filtered analog signals and filtered status signals. The protection algorithm unit is used to perform signal conversion based on the filtered analog signal and the filtered status signal according to the protection logic operation to obtain the protection analog signal and the protection status signal.

[0010] The system may optionally include: an operation and maintenance management module, which connects to the fault acquisition and protection processing module and the communication management module, to provide a Chinese and English graphical display interface and a Web online management platform.

[0011] In the above system, optionally, the communication management module is also used to receive query commands from the operation and maintenance management module and to collect data from the lower-level machine according to the query commands.

[0012] In the above system, optionally, the fault acquisition and protection processing module and the communication management module are integrated to perform hardware arbitration and priority mechanisms.

[0013] The above system may optionally include: a communication resource dynamic allocation unit, which is set inside the integrated fault acquisition and protection processing module and communication management module, for monitoring the data communication load of each priority, and when the high priority data communication load exceeds a preset threshold, the compressed free communication bandwidth is obtained by compressing the low priority data accuracy, and the compressed free communication bandwidth is allocated to high priority data communication.

[0014] In the above system, optionally, the fault acquisition and protection processing module and the communication management module use a clock priority decision algorithm for time synchronization; A clock priority decision algorithm, comprising: S1 clock determination steps: Use the fault acquisition and protection processing module as the master clock source and the communication management module as the slave clock source; S2 time setting steps: Receive the external synchronization clock signal through the master clock source, set the time q value, and send clock information to the slave clock source according to the external synchronization clock signal; S3 time determination steps: Determine the time based on the time q value: when the time q value is 2, it indicates that the time is set by external hardware; when the time q value is 1, it indicates that the time is set by the network; when the time q value is 0, it indicates that the master clock source is invalid. S4 module time synchronization steps: Synchronize the master clock source and slave clock source according to the time q value: When the time q value is 2, the master clock source synchronizes the time to the slave clock source; when the time q value is 1, the slave clock source is timed and then synchronized to the master clock source; when the time q value is 0, the slave clock source synchronizes the time to the master clock source.

[0015] As can be seen from the above technical solution, compared with the prior art, the present invention provides an integrated relay protection and communication management system for new energy power plants, which has the following beneficial effects: (1) It is compatible with multiple functions by using modular hardware integration, realizes hardware resource sharing, effectively reduces the complexity of on-site configuration, and can adapt to the ever-changing outdoor environment; (2) The relay protection and communication management integrated system disclosed in this invention integrates fault detection, protection action, data acquisition, local logic control and remote communication, which effectively saves installation space and improves the reliability and response speed of the system. This invention also supports standard communication protocols such as IEC 61850 and can achieve seamless connection with dispatch master station, SCADA system and centralized control platform. (3) In the distributed photovoltaic scenario, facing technical challenges such as reverse power flow, voltage fluctuation, harmonic interference and weak grid adaptability, the relay protection and communication management integrated system disclosed in this invention can improve the selectivity and sensitivity of the protection of the station equipment through the integrated coordination of protection and communication management. (4) This invention uses a communication management module to realize functions such as real-time uploading of operating status, remote setting switching, fault recording retrieval, and active uploading of collected information, which fully supports the intelligent monitoring and unattended operation of new energy power stations and improves the intelligence level of power station monitoring. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of an integrated relay protection and communication management system module for new energy power plants disclosed in this invention; Figure 2 This is a schematic diagram of an integrated relay protection and communication management system for new energy power plants, as disclosed in an embodiment of the present invention. Figure 3 This is a schematic diagram of the hardware resource sharing module structure disclosed in an embodiment of the present invention; Figure 4 This is a schematic diagram of the connection of the fault acquisition and protection processing module disclosed in an embodiment of the present invention; Figure 5 This is a schematic diagram of the connection of the multi-protocol dynamic adaptation communication management module disclosed in an embodiment of the present invention; Among them, 1-Power management module, 2-Signal acquisition module, 3-Execution module, 4-Fault acquisition and protection processing module, 5-Communication management module, 6-Dual redundancy intelligent power management module, 7-Multi-standard signal intelligent acquisition module, 8-Multi-standard signal intelligent execution module, 9-Multi-protocol dynamic adaptation communication management module, and 10-Web-based intelligent operation and maintenance management module. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0020] Reference Figure 1 This invention discloses an integrated relay protection and communication management system for new energy power plants, comprising: a power management module 1, a signal acquisition module 2, an execution module 3, a fault acquisition and protection processing module 4, and a communication management module 5.

[0021] Power management module 1 is connected to fault acquisition and protection processing module 4 and communication management module 5. Signal acquisition module 2 is connected to fault acquisition and protection processing module 4. Execution module 3 is connected to fault acquisition and protection processing module 4. Fault acquisition and protection processing module 4 is connected to communication management module 5. Signal acquisition module 2, execution module 3, and fault acquisition and protection processing module 4 are all connected to external devices. Communication management module 5 is connected to the host computer and the slave computer.

[0022] The power management module 1 adopts a redundant power supply design, which is used to convert AC input into multiple isolated DC outputs through AC / DC conversion circuit.

[0023] The signal acquisition module 2 is used to acquire analog signals from external devices and acquire status signals from external devices by setting multiple switch inputs; the analog signals include: voltage signals, current signals, temperature signals and AI signals.

[0024] The fault acquisition and protection processing module 4 is used to perform protection logic operations based on analog signals and status signals, and to generate protection action signals when external equipment fails; it is also used to receive user commands.

[0025] The execution module 3 is used to send control signals to external devices according to protection action signals or user instructions. The external devices then adjust their actions according to the control signals to ensure safe operation.

[0026] The communication management module 5 is used for communication with the host computer and for collecting data from the slave computer.

[0027] The integrated system disclosed in this invention acquires analog signals and status signals such as voltage, current, temperature, and AI from external devices through signal acquisition module 2, and performs the monitoring function of the integrated system. After acquiring the analog signals and status signals, signal acquisition module 2 transmits them to fault acquisition and protection processing module 4. Fault acquisition and protection processing module 4 performs protection logic operations according to the signal acquisition module 4. No action is taken when there is no fault, and the system operates normally. In the event of a fault, protection action is performed, generating a protection action signal. Execution module 3 regulates external devices according to the protection action signal, disconnecting or regulating external devices from the power grid to enter low-power operation, thereby realizing the relay protection of new energy power plants.

[0028] Among them, the status signal acquired by the signal acquisition module 2 is a switch signal, which can be regarded as including two operating states: 0 or 1. When it is 0, it means that the voltage, current, temperature and AI analog signals of the external device are normal, and the fault acquisition and protection processing module 4 retains the operating information of the external device for the communication management module 5 to check. When it is 1, it means that the voltage, current, temperature and AI analog signals of the external device are abnormal. In addition to retaining the operating information, the fault acquisition and protection processing module 4 sends a protection action signal. The execution module 3 responds in a timely manner and cuts off the operation of the external device or reduces the operating power of the external device to ensure that the device can cope with possible current surges, thereby realizing the relay protection function of the integrated system.

[0029] Furthermore, this invention also enables remote monitoring of new energy power plants through the communication management module 5's interaction with the host computer. Staff can access the communication management module 5 via the host computer and retrieve external equipment operation information stored in the fault acquisition and protection processing module 4, ensuring that equipment operation information is available at all times. Staff can also remotely control the lower-level devices via the host computer, driving the lower-level devices through the communication management module 5 to achieve targeted information collection, further enhancing the communication management function of this integrated system.

[0030] Optionally, the integrated relay protection and communication management system for new energy power plants disclosed in this invention further includes: a hardware resource sharing module, which is connected to the power management module 1, the signal acquisition module 2, the execution module 3, the fault acquisition and protection processing module 4 and the communication management module 5 respectively, and adopts a dual DSP (Digital Signal Processor) structure.

[0031] Furthermore, the hardware resource sharing module includes a peripheral resource sharing unit, a memory resource sharing unit, and a power management sharing unit. The peripheral resource sharing unit, the memory resource sharing unit, and the power management sharing unit are respectively connected to the DSP. The power management sharing unit is used to monitor the voltage status of the DSP through a power monitoring circuit.

[0032] Combination Figure 3 The peripheral resource sharing unit shares the same set of high-precision analog-to-digital converters (ADCs). The peripheral resource sharing unit alternately controls the sampling time window of the ADC through polling or interrupt signals to avoid conflicts. The peripheral resource sharing unit also shares the analog output channel of the digital-to-analog converter (DAC) and selects the currently responsible DSP through the DAC register configuration. The peripheral resource sharing unit also shares an Ethernet controller (such as a PHY chip) and controls the communication priority through software protocol.

[0033] The memory resource sharing unit uses dual-port SRAM (Static Random Access Memory) or FPGA (Field-Programmable Gate Array) integrated dual-port memory, allowing two DSPs to access the same memory area simultaneously. The memory resource sharing unit has independent access permissions and a robust arbitration mechanism to avoid address conflicts and data mutual exclusion access. The two DSPs perform time-sharing reading of the Flash memory of the memory resource sharing unit through the bus controller.

[0034] The power management shared unit monitors the voltage status of two DSPs simultaneously through the power monitoring circuit, reducing PCB (Printed Circuit Board) layout, effectively reducing the number of hardware configurations in the integrated system, and improving the system integration.

[0035] Optionally, the signal acquisition module 2 includes a synchronous sampling unit, a digital filtering unit, and a protection algorithm unit connected in sequence.

[0036] The synchronous sampling unit is used to acquire analog signals and status signals.

[0037] The digital filtering unit is used to filter analog signals and status signals to obtain filtered analog signals and filtered status signals.

[0038] The protection algorithm unit is used to perform signal conversion based on the filtered analog signal and the filtered status signal according to the protection logic operation to obtain the protection analog signal and the protection status signal.

[0039] The synchronous sampling unit and the protection algorithm unit are integrated on the same signal acquisition board. This board communicates bidirectionally with the communication management module 5 through the high-speed bus on the backplane, and is equipped with an internal communication resource dynamic allocation system to dynamically construct communication resource allocation strategies to ensure the real-time and accurate transmission of key data.

[0040] Optionally, the integrated relay protection and communication management system for new energy power plants disclosed in this invention further includes: an operation and maintenance management module, which is connected to the fault acquisition and protection processing module 4 and the communication management module 5, and is used to provide a Chinese and English graphical display interface and a Web online management platform.

[0041] Furthermore, the communication management module 5 is also used to receive query commands from the operation and maintenance management module and to collect data from the lower-level machine according to the query commands.

[0042] Optionally, the fault acquisition and protection processing module 4 and the communication management module 5 are integrated to perform hardware arbitration and priority mechanisms. This integration enables intelligent allocation of protection and communication priorities under fault scenarios. After a protection action is triggered by the fault acquisition and protection processing module 4, the communication management module 5 prioritizes the transmission of critical data. If communication with the communication management module 5 is interrupted or an external device malfunctions, the fault acquisition and protection processing module 4 automatically blocks risky operations to ensure system safety. This invention, through the integration of the fault acquisition and protection processing module 4 and the communication management module 5, effectively reduces the system's configuration complexity and makes system connection more convenient during deployment.

[0043] Furthermore, the integrated relay protection and communication management system for new energy power plants disclosed in this invention also includes: a communication resource dynamic allocation unit, which is set inside the integrated fault acquisition and protection processing module 4 and communication management module 5, for monitoring the data communication load of each priority, and when the high priority data communication load exceeds a preset threshold, the compressed free communication bandwidth is obtained by compressing the low priority data accuracy, and the compressed free communication bandwidth is allocated to the high priority data communication.

[0044] Reference Figure 2As an optional embodiment, the present invention discloses an integrated relay protection and communication management system for new energy power plants, comprising a dual-redundant intelligent power management module 6, a multi-standard signal intelligent acquisition module 7, a fault acquisition and protection processing module 4, a multi-standard signal intelligent execution module 8, a multi-protocol dynamic adaptation communication management module 9, and a Web-based intelligent operation and maintenance management module 10. The dual-redundant intelligent power management module 6 is equivalent to the power management module 1, the multi-standard signal intelligent acquisition module 7 is equivalent to the signal acquisition module 2, the multi-standard signal intelligent execution module 8 is equivalent to the execution module 3, the multi-protocol dynamic adaptation communication management module 9 is equivalent to the communication management module 5, and the Web-based intelligent operation and maintenance management module 10 is equivalent to the operation and maintenance management module.

[0045] The dual-redundant intelligent power management module 6 converts the 380V power distribution network input into multiple isolated DC outputs through an AC / DC conversion circuit, providing independent regulated power to the fault acquisition and protection processing module 4 and the multi-protocol dynamic adaptation communication management module 9, ensuring that the electromagnetic compatibility index meets the requirements of GB / T 14598 standard.

[0046] Combination Figure 3 After the integrated system is powered on, the dual-redundant intelligent power management module 6 outputs 5V voltage to power the integrated system through two completely independent 85–264VAC / DC converters. The multi-standard signal intelligent acquisition module 7 first completes self-test and AD sampling calibration, and the multi-protocol dynamic adaptation communication management module 9 simultaneously starts network topology scanning and establishes a connection with the station control layer system.

[0047] Combination Figure 3 The integrated system disclosed in this invention is also connected to external devices through a multi-standard signal intelligent execution module 8. The multi-standard signal intelligent execution module 8 provides 10 relay outputs, which are used to send control signals to external devices according to the protection logic of the fault acquisition and protection processing module 4 or user instructions, so as to realize the protection, control and operation of power equipment.

[0048] As an optional embodiment, the fault acquisition and protection processing module 4 and the multi-protocol dynamic adaptation communication management module 9 each embed an RS485 communication unit. The two RS485 communication units are directly connected inside the device via shielded twisted-pair cable, such as... Figure 2 As shown, the fault acquisition and protection processing module 4 and the multi-protocol dynamic adaptation communication management module 9 achieve bidirectional communication via a high-speed data bus. The multi-standard signal intelligent acquisition module 7 uploads three-phase current / voltage analog quantities, switch quantity change information, and protection action sequences (including action type, timestamp, and fault recording data) to the multi-protocol dynamic adaptation communication management module 9 in real time. The communication protocol adopts the DL / T860 (IEC61850) MMS mapping mode.

[0049] Specifically, the information collected by the multi-standard signal intelligent acquisition module 7, including action type, time stamp, and fault waveform data, is handed over to the fault acquisition and protection processing module 4 for logical operation. If the information exceeds the preset safety threshold in the fault acquisition and protection processing module 4, the fault acquisition and protection processing module 4 will generate protection action signals such as tripping and alarm. The execution module 3 will then perform protection actions such as controlling the external equipment to disconnect and performing alarm operations based on the protection action signals such as tripping and alarm.

[0050] The fault acquisition and protection processing module 4 and the multi-protocol dynamic adaptation communication management module 9 are equipped with an internal dynamic communication resource allocation system. This system dynamically constructs a communication resource allocation strategy based on the priority of the transmitted data. By default, higher priority data is allocated higher communication bandwidth, and the communication load of each priority data is monitored in real time. When the communication load of high-priority data exceeds 80%, the precision of low-priority data is automatically compressed from 16 bits to 8 bits, achieving bandwidth compression for low-priority data communication. This bandwidth is then real-time allocated to high-priority data communication, ensuring the real-time and accurate transmission of critical data.

[0051] For communication transmission priorities in new energy power plants: the highest priority includes protection action events, fault waveform data, and key telemetry / telecommunication data transmitted in real time via the network port; the second highest priority includes data transmitted by front-end acquisition devices via RS-45 or Ethernet ports; and the lowest priority includes non-real-time data that can be cached or obtained through background polling. The protection action execution of the fault acquisition and protection processing module 4 takes precedence over the communication tasks of the multi-protocol dynamic adaptation communication management module 9, prioritizing the transmission of protection actions and waveform data.

[0052] The fault acquisition and protection processing module 4 integrates the GOOSE (framework) function, which is used for independent networking or direct point-to-point connection to transmit real-time information such as circuit breaker status and protection action signals, so as to realize fast and reliable information exchange between devices.

[0053] Furthermore, the multi-protocol dynamic adaptation communication management module 9 includes an Ethernet RJ-45 electrical interface and an optical port; the multi-protocol dynamic adaptation communication management module 9 supports Ethernet interface data forwarding, with each forwarding channel supporting the uploading of 4096 telemetry points, 2048 remote signaling points, 1024 remote control points, 1024 remote adjustment points, 2048 power data points, and 2048 event records; it supports simultaneous data forwarding through 4 forwarding channels; it supports transparent transmission protocols, Modbus RTU, Modbus TCP / IP, IEC 60870-5-101 remote control protocol, IEC 60870-5-103 relay protection equipment communication interface standard, IEC 60870-5-104 network access protocol, IEC61850 protocol, and manufacturer-specific protocols; it supports DNS domain name resolution function; it supports static routing function; it supports real-time monitoring of communication status; and it supports uploading fault information to the Web-based intelligent operation and maintenance management module 10, and can automatically restore the connection after the network fault is recovered. The integrated system disclosed in this invention achieves compatibility with multiple protocols by dynamically adapting the Ethernet RJ-45 electrical interface and optical port of the communication management module 9, thereby expanding the system's operational compatibility, further improving the system's integration, expanding the system's functions, and effectively reducing the wiring operations required for relay protection and communication management in the field, making relay protection and communication management simpler and faster.

[0054] Reference Figure 5 The multi-protocol dynamic adaptation communication management module 9 connects to the lower-level devices. The communication interfaces of the multi-protocol dynamic adaptation communication management module 9 include one Ethernet RJ-45 electrical interface and ten RS485 serial ports, with each communication interface supporting connections to 64 lower-level devices. The lower-level devices specifically refer to those directly connected to the multi-protocol dynamic adaptation communication management module 9, responsible for data acquisition and control of specific equipment, including protection devices, measurement and control devices, automation terminals, smart meters, sensors, etc., whose function is to collect and transmit various data from the power system.

[0055] The multi-protocol dynamic adaptation communication management module 9 supports multiple acquisition methods for collecting lower-level machine data, including: Method 1, real-time acquisition, which actively obtains the operating data of the lower-level machine through an online polling mechanism to ensure the real-time nature of the data; Method 2, timed automatic acquisition, which allows setting the acquisition time interval according to operation and maintenance needs to realize periodic data acquisition of lower-level machine data; Method 3, platform command triggered acquisition, which receives query commands from the Web-based intelligent operation and maintenance management module 10 and immediately starts data acquisition from all lower-level machines or a specified lower-level machine.

[0056] Furthermore, in combination Figure 4In the integrated relay protection and communication management system for new energy power plants disclosed in this invention, the multi-protocol dynamic adaptation communication management module 9 is also connected to a host computer. When establishing a Web network connection, after the system powers on, it assigns an IP address to the host computer within the same network segment as the multi-protocol dynamic adaptation communication management module 9, ensuring mutual access between the two machines. The host computer enters the corresponding IP address in its browser address bar to establish a connection with the integrated module and logs in, accessing the default Web function page. The online Web function supports viewing network parameters, time parameters, collected data, extended data, forwarded data, system maintenance parameters, data visualization, etc., and supports modification of writable parameters.

[0057] Optionally, the multi-protocol dynamic adaptation communication management module 9 also includes: a protocol conversion engine and a preset mapping table.

[0058] The protocol conversion engine receives real-time data from the multi-standard signal intelligent acquisition module via the high-speed backplane bus and receives data from third-party intelligent devices via a physical interface. A preset mapping table, stored in the protocol conversion engine's local non-volatile memory, maps data fields from different protocols to a unified data model, including analog and status data from its own fault acquisition and protection processing module 4. The protocol conversion engine then uploads the converted unified data model to the Web-based intelligent operation and maintenance management unit 10 via Ethernet.

[0059] The fault acquisition and protection processing module 4 and the multi-protocol dynamic adaptation communication management module 9 are integrated to realize the allocation of protection and communication priorities under fault conditions. After integration, the fault acquisition and protection processing module 4 and the multi-protocol dynamic adaptation communication management module 9 can use hardware arbitration and priority mechanisms: the hardware priority arbitrator ensures that critical tasks occupy shared resources first, avoiding task blocking; the FPGA arbitrator manages the access permissions of resources such as ADC and memory, and the priority is fixed by hardware logic, avoiding software scheduling delays.

[0060] Combination Figure 3 In the integrated system disclosed in this invention, the hardware arbitration and priority mechanism is implemented based on dual DSPs. The two DSPs exchange data in real time through shared memory or high-speed communication bus, and use mailbox or semaphore mechanism to synchronize task progress.

[0061] Specifically, after integrating the fault acquisition and protection processing module 4 and the multi-protocol dynamic adaptation communication management module 9, a built-in watchdog timer and heartbeat detection mechanism are implemented to periodically verify the synchronization status of the dual DSPs. During fault switching, the master-slave roles are quickly switched via a switching flag in the shared memory to ensure uninterrupted protection functionality. Critical tasks are triggered via interrupts, bypassing the task scheduling layer and directly invoking the protection logic. Lockstep operation is adopted: both DSPs execute the same code, comparing calculation results in real time to detect hardware faults. Under fault scenarios, corresponding protection is triggered according to the fault type. High current blocking or CT / PT disconnection triggers blocking, while simultaneously recording events and fault waveforms.

[0062] Optionally, in the integrated relay protection and communication management system for new energy power plants disclosed in this invention, the fault acquisition and protection processing module 4 and the communication management module 5 use a clock priority decision algorithm for time synchronization.

[0063] A clock priority decision algorithm, comprising: S1 clock determination steps: The fault acquisition and protection processing module 4 is used as the master clock source, and the communication management module 5 is used as the slave clock source.

[0064] S2 time setting steps: Receive the external synchronization clock signal through the master clock source, set the time q value, and send clock information to the slave clock source according to the external synchronization clock signal; S3 time determination steps: Determine the time based on the time q value: when the time q value is 2, it indicates that the external hardware is in sync; when the time q value is 1, it indicates that the network is in sync; when the time q value is 0, it indicates that the master clock source is invalid. S4 module time synchronization steps: Synchronize the master clock source and slave clock source according to the time q value: When the time q value is 2, the master clock source synchronizes the time to the slave clock source; when the time q value is 1, the slave clock source is timed and then synchronized to the master clock source; when the time q value is 0, the slave clock source synchronizes the time to the master clock source.

[0065] In the embodiments disclosed in this invention, the following settings ensure that the fault acquisition and protection processing module 4 and the communication management module 5 can implement the clock priority decision algorithm: 1) The fault acquisition and protection processing module 4 integrates an IEEE1588 hardware timestamp module, an IRIG-B time synchronization module, a GPS / BeiDou dual-mode time synchronization module, and an SNTP network time synchronization module; 2) Automatic switching between master and slave clock sources; 3) Support for intelligent identification of GPS, IRIG-B, SNTP, and IEEE1588 time synchronization methods; 4) The communication management module 5 has a built-in clock reliability judgment unit that evaluates jitter and frequency offset, and supports intelligent switching between GPS, IRIG-B code, SNTP, and IEEE1588 time synchronization methods; 5) Performing a clock phase CRC (Cyclic Redundancy Check) check every 50ms.

[0066] Specifically, in combination Figure 2 ,by Figure 2 Taking the disclosed embodiment as an example, the clock priority decision algorithm is described in detail: The fault acquisition and protection processing module 4 and the multi-protocol dynamic adaptation communication management module 9 (i.e., communication management module 5) use a set of clock priority decision algorithms to achieve time synchronization. The fault acquisition and protection processing module 4 acts as the master clock source, with built-in GPS, IRIG-B, SNTP, and IEEE 1588 time synchronization interfaces to receive external synchronization clock signals; the multi-protocol dynamic adaptation communication management module 9 acts as a slave device, i.e., a slave clock source, and integrates an SNTP time synchronization module. This invention determines the type of the external access clock source and obtains the values ​​0, 1, and 2, which are used as the time quality bits of the fault acquisition and protection processing module 4.

[0067] The specific process of the clock priority decision algorithm includes: the fault acquisition and protection processing module 4 sets the time q value and sends clock information to the multi-protocol dynamic adaptation communication management module 9. When the time q value is 2, it indicates that the external hardware is synchronized; when the time q value is 1, it indicates that the network is synchronized.

[0068] When the time q value is 0, it indicates that the clock source is invalid. At this time, the clock source uses the RTC clock source built into the fault acquisition and protection processing module 4 for time synchronization. The multi-protocol dynamic adaptation communication management module 9 can collect the time q value of the fault acquisition and protection processing module 4 and perform a clock phase CRC check every 50ms to ensure the reliability of time message transmission.

[0069] If the value of q is 0, the time of the multi-protocol dynamic adaptation communication management module 9 is synchronized to the fault acquisition and protection processing module 4; if the value of q is 1, the time of the multi-protocol dynamic adaptation communication management module 9 is used as the standard, and the time is synchronized to the fault acquisition and protection processing module 4 at regular intervals; if the value of q is 2, the fault acquisition and protection processing module 4 synchronizes its time with the multi-protocol dynamic adaptation communication management module 9.

[0070] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An integrated relay protection and communication management system for new energy power plants, characterized in that, include: Power management module, signal acquisition module, execution module, fault acquisition and protection processing module, and communication management module; The power management module is connected to the fault acquisition and protection processing module and the communication management module; the signal acquisition module is connected to the fault acquisition and protection processing module; the execution module is connected to the fault acquisition and protection processing module; the fault acquisition and protection processing module is connected to the communication management module; the signal acquisition module, the execution module, and the fault acquisition and protection processing module are all connected to external devices; and the communication management module is connected to the host computer and the slave computer. The power management module is used to convert AC input into multiple isolated DC outputs via AC / DC conversion circuitry; The signal acquisition module is used to acquire analog signals from external devices and to acquire status signals from external devices by setting multiple digital inputs; the analog signals include: voltage signals, current signals, temperature signals, and AI signals; The fault acquisition and protection processing module is used to perform protection logic operations based on analog signals and status signals, generate protection action signals when external devices fail, and also to receive user commands. The execution module is used to send control signals to external devices based on protection action signals or user instructions. The external devices then adjust their actions according to the control signals to ensure safe operation. The communication management module is used for communication with the host computer and for collecting data from the slave computer.

2. The integrated relay protection and communication management system for new energy power plants according to claim 1, characterized in that, Also includes: The hardware resource sharing module is connected to the power management module, signal acquisition module, execution module, fault acquisition and protection processing module, and communication management module, respectively, and adopts a dual DSP structure.

3. The integrated relay protection and communication management system for new energy power plants according to claim 2, characterized in that, The hardware resource sharing module includes a peripheral resource sharing unit, a memory resource sharing unit, and a power management sharing unit, which are respectively connected to the DSP. The power management shared unit is used to monitor the voltage status of the DSP through the power monitoring circuit.

4. The integrated relay protection and communication management system for new energy power plants according to claim 1, characterized in that, The power management module employs a redundant power supply design.

5. The integrated relay protection and communication management system for new energy power plants according to claim 1, characterized in that, The signal acquisition module includes a synchronous sampling unit, a digital filtering unit, and a protection algorithm unit connected in sequence. The synchronous sampling unit is used to acquire analog signals and status signals; The digital filtering unit is used to filter analog signals and status signals to obtain filtered analog signals and filtered status signals. The protection algorithm unit is used to perform signal conversion based on the filtered analog signal and the filtered status signal according to the protection logic operation to obtain the protection analog signal and the protection status signal.

6. The integrated relay protection and communication management system for new energy power plants according to claim 1, characterized in that, Also includes: The operation and maintenance management module, connected to the fault acquisition and protection processing module and the communication management module, provides a graphical display interface in both Chinese and English and a web-based online management platform.

7. The integrated relay protection and communication management system for new energy power plants according to claim 6, characterized in that, The communication management module is also used to receive query commands from the operation and maintenance management module and to collect data from the lower-level machine according to the query commands.

8. The integrated relay protection and communication management system for new energy power plants according to claim 1, characterized in that, The fault acquisition and protection processing module and the communication management module are integrated to perform hardware arbitration and priority mechanisms.

9. The integrated relay protection and communication management system for new energy power plants according to claim 8, characterized in that, Also includes: The communication resource dynamic allocation unit is located inside the integrated fault acquisition and protection processing module and communication management module. It is used to monitor the data communication load of each priority. When the high-priority data communication load exceeds the preset threshold, the compressed free communication bandwidth is obtained by compressing the low-priority data and then allocated to the high-priority data communication.

10. The integrated relay protection and communication management system for new energy power plants according to claim 1, characterized in that, The fault acquisition and protection processing module and the communication management module use a clock priority decision algorithm for time synchronization; A clock priority decision algorithm, comprising: S1 clock determination steps: Use the fault acquisition and protection processing module as the master clock source and the communication management module as the slave clock source; S2 time setting steps: Receive the external synchronization clock signal through the master clock source, set the time q value, and send clock information to the slave clock source according to the external synchronization clock signal; S3 time determination steps: Determine the time based on the time q value: when the time q value is 2, it indicates that the external hardware is in time; when the time q value is 1, it indicates that the network is in time; when the time q value is 0, it indicates that the master clock source is invalid. S4 module time synchronization steps: Synchronize the master clock source and slave clock source according to the time q value: When the time q value is 2, the master clock source synchronizes the time to the slave clock source; when the time q value is 1, the slave clock source is timed and then synchronized to the master clock source; when the time q value is 0, the slave clock source synchronizes the time to the master clock source.

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