Safety and stability control system applied to power system

Abstract

The invention relates to a safety and stability control system applied to a power system. Relates to the field of power system safety and stability control. The system comprises a data acquisition processing layer, a strategy logic standardization processing layer and a human-computer interface interaction layer. The data acquisition and processing layer acquires analog signal data and first digital signal data of a to-be-controlled device, converts the analog signal data into second digital signal data by adopting an analog-to-digital converter, and calibrates the first digital signal data and the second digital signal data based on a first digital signal processor to obtain calibrated data; the strategy logic standardization processing layer receives the calibrated data, and generates a control instruction and a control measure after re-calibrating the calibrated data based on a second digital signal processor; and the man-machine interface interaction layer receives the control instruction and the control measure, and controls the device to be controlled based on the control instruction and the control measure. By adopting the method, the control efficiency of the safety and stability control system on the to-be-controlled device can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of power system safety and stability control, and in particular to a safety and stability control system applied to a power system. Background Art

[0002] With the rapid development of UHV AC and DC power grids, the response characteristics of power grids are becoming more and more complex. A safe and stable control system has become the standard configuration for the safe operation of current UHV AC and DC power grids. Its reliable operation is crucial to ensuring the safety and stability of the power grid.

[0003] The existing control system's reliability assurance measures for UHV AC / DC power grids mainly rely on pre-factory testing and on-site joint debugging of the device, but are unable to promptly detect abnormal links and safety hazards in the actual operation of the device. These are mainly discovered and reported step by step by monitoring personnel, who then perform repairs on them by maintenance personnel, resulting in a long cycle for abnormal handling. Therefore, the existing safety and stability control system has the problem of low control efficiency for control devices. Summary of the invention

[0004] Based on this, it is necessary to provide a safe and stable control system applied to the power system to address the technical problem of low control efficiency of the control device under control of the above-mentioned safe and stable control system.

[0005] The present application provides a safe and stable control system applied to an electric power system, the system comprising a data acquisition processing layer, a strategy logic standardization processing layer and a human-machine interface interaction layer;

[0006] The data acquisition processing layer is used to acquire analog signal data and first digital signal data of the device to be controlled, convert the analog signal data into second digital signal data using an analog-to-digital converter, and then calibrate the first digital signal data and the second digital signal data based on a first digital signal processor to obtain calibrated data;

[0007] The strategy logic standardization processing layer is used to receive the calibrated data, and generate control instructions and control measures after recalibrating the calibrated data based on the second digital signal processor;

[0008] The human-machine interface interaction layer is used to receive the control instruction and the control measure, and complete the control of the device to be controlled based on the control instruction and the control measure;

[0009] In one embodiment, the data acquisition and processing layer also includes a conventional transformer, an electronic transformer and an intelligent input; the conventional transformer is used to collect the analog signal data; the intelligent input and the electronic transformer are used to collect the first digital signal data.

[0010] In one of the embodiments, the sampling frequency of the analog signal data is not less than 4000 Hz.

[0011] In one embodiment, the data acquisition processing layer also includes an output relay and a start relay; the first digital signal processor includes a first sub-digital signal processor and a second sub-digital signal processor; the output relay is connected to the first sub-digital signal processor and the second sub-digital signal processor, and the start relay is connected to the output relay, the first sub-digital signal processor and the positive power supply. When the first sub-digital signal processor detects a fault signal, the fault signal is input into the start relay to open the positive power supply of the output relay, and the second sub-digital signal processor performs protection logic calculations. When the result of the protection logic calculation meets the action condition, the output relay is driven to act.

[0012] In one embodiment, the strategy logic standardization processing layer also includes a data processing module, a remote communication module and a communication interface; the data processing module is connected to the communication interface and the remote communication module respectively, and the data processing module is used to receive the communication data of the remote communication module, and to receive the calibrated data of the data acquisition processing layer through the communication interface, and to process the communication data and the calibrated data to obtain the operating status of the device to be controlled.

[0013] In one of the embodiments, the human-machine interface interaction layer is also used for liquid crystal display, time synchronization printing, background monitoring and scheduling monitoring.

[0014] In one of the embodiments, the liquid crystal display is used to display the operating status of the device to be controlled, data of the data acquisition and processing layer, and strategy action information.

[0015] In one of the embodiments, the operating status of the device to be controlled also includes the operating status of a hardware board, and the operating status of the hardware board includes the temperature, operating voltage and abnormal information of the hardware board.

[0016] In one embodiment, the system uses a high temperature material communication bus to transmit multi-channel data, and uses Ethernet, fiber optic communication technology and a controller area network bus to transmit signals.

[0017] In one embodiment, the protocol corresponding to the calibrated data includes a first protocol corresponding to the analog signal data and a second protocol corresponding to the first digital signal data.

[0018] The above-mentioned safety and stability control system applied to the power system includes a data acquisition processing layer, a strategy logic standardization processing layer and a human-machine interface interaction layer; wherein the data acquisition processing layer is used to collect analog signal data and first digital signal data of the device to be controlled, and the analog signal data is converted into second digital signal data by an analog-to-digital converter, and then the first digital signal data and the second digital signal data are calibrated based on the first digital signal processor to obtain calibrated data; the strategy logic standardization processing layer is used to receive the calibrated data, and after recalibrating the calibrated data based on the second digital signal processor, a control instruction and control measures are generated; the human-machine interface interaction layer is used to receive the control instructions and control measures, and complete the control of the device to be controlled based on the control instructions and control measures. Through the collaborative work of the analog-to-digital converter and the first digital signal processor in the above process, the system can accurately convert the analog signal into a digital signal and calibrate it to ensure the accuracy and reliability of the data; the strategy logic standardization processing layer uses the second digital signal processor to recalibrate the calibrated data to effectively reduce errors; the system can quickly process and respond to real-time data, ensuring that adjustments can be made in time when abnormal conditions occur in the power system, thereby improving the control efficiency of the safety and stability control system on the device to be controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 is a schematic diagram of a safety and stability control system applied to a power system in one embodiment;

[0021] Figure 2 is a detailed schematic diagram of a safety and stability control system applied to a power system in another embodiment;

[0022] Figure 3 A schematic diagram of the connection relationship between a data processing module, a remote communication module and a communication interface in one embodiment;

[0023] Figure 4 A schematic diagram of the connection relationship between multiple acquisition devices and a main control device in one embodiment;

[0024] Figure 5 The figure is a schematic diagram of the steps for constructing a safety and stability control system applied to an electric power system in one embodiment. DETAILED DESCRIPTION

[0025] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0027] It can be understood that the terms "first", "second", etc. used in the present application can be used in this article to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element.

[0028] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. In addition, the "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if there is transmission of electrical signals or data between the connected objects.

[0029] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0030] like Figure 1 As shown, a safe and stable control system applied to a power system is provided, the system includes a data acquisition processing layer, a strategy logic standardization processing layer and a human-machine interface interaction layer;

[0031] The data acquisition processing layer is used to collect the analog signal data and the first digital signal data of the device to be controlled, and use the analog-to-digital converter to convert the analog signal data into the second digital signal data, and then calibrate the first digital signal data and the second digital signal data based on the first digital signal processor to obtain the calibrated data; the strategy logic standardization processing layer is used to receive the calibrated data, and after re-calibrating the calibrated data based on the second digital signal processor, generate control instructions and control measures; the human-machine interface interaction layer is used to receive control instructions and control measures, and complete the control of the device to be controlled based on the control instructions and control measures.

[0032] Among them, the output end of the second digital signal processor of the data acquisition processing layer is connected to the communication interface of the strategy logic standardization processing layer, and the output end of the third digital signal processor and the output end of the fourth digital signal processor of the strategy logic standardization processing layer are connected to the controller (CPU) of the human-computer interface interaction layer.

[0033] As an example, analog signal data may be a continuous signal generated by the device to be controlled, usually in the form of voltage or current, etc., which can reflect the operating status of the device to be controlled or changes in the external environment; the first digital signal data may be digital signal data that does not require conversion by an analog-to-digital converter; the second digital signal data is signal data obtained after preliminary digitization of analog signal data; an analog-to-digital converter is a device that converts analog signals into digital signals; calibrated data refers to data that eliminates measurement errors and deviations through comparison and adjustment during the data processing process; the second digital signal processing is used to re-calibrate the calibrated data to improve the accuracy of the data; control instructions may be specific commands that instruct the system on how to operate the device to be controlled; control measures may be a series of action plans taken by the system to deal with specific situations, such as adjusting the current, starting backup equipment, etc.

[0034] Furthermore, the system can be divided into a main control device layer and a data acquisition device layer, wherein the main control device layer includes a human-machine interface interaction layer and a strategy logic standardization processing layer, and the data acquisition device layer includes a data acquisition processing layer.

[0035] The above-mentioned safety and stability control system applied to the power system includes a data acquisition processing layer, a strategy logic standardization processing layer and a human-machine interface interaction layer; wherein the data acquisition processing layer is used to collect analog signal data and first digital signal data of the device to be controlled, and the analog signal data is converted into second digital signal data by an analog-to-digital converter, and then the first digital signal data and the second digital signal data are calibrated based on the first digital signal processor to obtain calibrated data; the strategy logic standardization processing layer is used to receive the calibrated data, and after recalibrating the calibrated data based on the second digital signal processor, a control instruction and control measures are generated; the human-machine interface interaction layer is used to receive the control instructions and control measures, and complete the control of the device to be controlled based on the control instructions and control measures. Through the collaborative work of the analog-to-digital converter and the first digital signal processor in the above process, the system can accurately convert the analog signal into a digital signal and calibrate it to ensure the accuracy and reliability of the data; the strategy logic standardization processing layer uses the second digital signal processor to recalibrate the calibrated data to effectively reduce errors; the system can quickly process and respond to real-time data, ensuring that adjustments can be made in time when abnormal conditions occur in the power system, thereby improving the control efficiency of the safety and stability control system on the device to be controlled.

[0036] In an exemplary embodiment, the data acquisition processing layer further includes a conventional transformer, an electronic transformer and an intelligent input; the conventional transformer is used to collect analog signal data; the intelligent input and the electronic transformer are used to collect first digital signal data.

[0037] Among them, conventional transformers, such as voltage transformers and current transformers, can be used to convert high voltage or high current into measurable small voltage or small current signals; analog signal data refers to the continuous signal generated by conventional transformers; electronic transformers use electronic technology for signal acquisition, which can provide higher accuracy, wide bandwidth and fast response time, and their output is digital signal data; intelligent input is a switching device that integrates multiple functions and has the capabilities of data acquisition, control and communication.

[0038] As an example, conventional transformers are used to collect analog signal data such as voltage and current of components such as lines, transformers or units required by the system; intelligent inputs and electronic transformers are used to collect first digital signal data such as circuit breaker position and tripping of relay protection devices, i.e. protection tripping information, and convert the above analog signal data into digital quantities, and transmit the data to the strategy logic processing layer together with the first digital signal data according to standardized protocols and interfaces.

[0039] In this embodiment, through the coordinated work of conventional transformers, electronic transformers, and intelligent input devices, accurate analog signal data and first digital signal data can be effectively collected, measurement errors can be reduced, and data reliability and accuracy can be improved.

[0040] In one embodiment, the sampling frequency of the analog signal data is not less than 4000 Hz.

[0041] By controlling the sampling frequency of analog signal data, it can be ensured that important information in the analog signal data can be effectively captured; the higher the sampling frequency, the better the signal quality; it can also ensure that a high accuracy is maintained during the digital signal conversion and processing process.

[0042] In one embodiment, Figure 2 As shown, the data acquisition processing layer also includes an export relay and a start relay; the first digital signal processor includes a first sub-digital signal processor and a second sub-digital signal processor; the export relay is connected to the first sub-digital signal processor and the second sub-digital signal processor, and the start relay is connected to the export relay, the first sub-digital signal processor and the positive power supply. When the first sub-digital signal processor detects a fault signal, the fault signal is input into the start relay to open the positive power supply of the export relay, and the second sub-digital signal processor performs protection logic calculations. When the result of the protection logic calculation meets the action condition, the export relay is driven to act.

[0043] Among them, the output relay is used to cut off the load power supply when a system fault occurs; the start relay is used to activate or disable the circuit under specific conditions; the fault signal can be a signal involving physical parameters such as current and temperature exceeding the set range; the positive power supply is the positive pole or positive voltage source of the power supply.

[0044] As an example, the first sub-digital signal processor is a starting digital signal processor, and the second sub-digital signal processor is a protection digital signal processor. The first sub-digital signal processor first processes the input signal and performs fault detection. When a fault signal is detected, the fault signal is transmitted to the starting relay, connecting the positive power supply so that the positive power supply supplies power to the output relay. Then the second sub-digital signal processor performs protection logic calculations and determines whether it is necessary to drive the output relay to act based on the detection results of the first sub-digital signal processor and the system's preset protection logic.

[0045] In this embodiment, a dual calibration mechanism of the protection digital signal processor and the startup digital signal processor and double redundant sampling are adopted to improve the reliability of information collection. By combining the functions of the output relay, the startup relay and the two sub-digital signal processors, it is ensured that in the event of a fault, timely detection, calculation and power supply can be cut off, providing an effective protection mechanism.

[0046] Further, in one embodiment, if Figure 3 As shown, the strategy logic standardization processing layer also includes a data processing module, a remote communication module and a communication interface; the data processing module is connected to the communication interface and the remote communication module respectively, and the data processing module is used to receive the communication data of the remote communication module, and to receive the calibrated data of the data acquisition processing layer through the communication interface, and to process the communication data and the calibrated data to obtain the operating status of the device to be controlled.

[0047] As an example, the strategy processing layer receives data collected by the local data acquisition processing layer and data input by the remote communication module, comprehensively analyzes and calculates analog signal data such as voltage, current, frequency and power, and combines the circuit breaker position information, protection tripping information and data input by the remote communication module to judge the operation and fault status of each component of the control device, and further generates control commands and measures through the strategy logic standardization processing layer, and exports them through the remote communication module or the information acquisition layer of this station. At the same time, the relevant strategy action information is transmitted to the human-machine interface interaction layer, where the export adopts independent startup and logic settings to ensure that the export is accurate and reliable.

[0048] Furthermore, the strategy logic standardization processing layer also classifies modules according to various basic control strategies, builds a stabilization control strategy module library, and based on the module database, selects relevant functions through configuration to implement a combined stabilization control strategy, and utilizes the redundancy check of the third sub-digital signal processor and the fourth sub-digital signal processor in the second digital signal processor to accurately generate relevant control commands and measures.

[0049] In this embodiment, the communication data is received from the remote communication module through the data processing module, and the calibrated data of the data acquisition processing layer is obtained through the communication interface, and the obtained data is integrated, so that data from different sources can be effectively collected and comprehensively analyzed to provide more comprehensive information; by processing the calibrated data, the system can monitor the operating status of the device to be controlled in real time and improve management efficiency.

[0050] In one embodiment, the human-machine interface interaction layer is also used for liquid crystal display, time synchronization printing, background monitoring, and scheduling monitoring.

[0051] Among them, the LCD screen can be used to display the system's operating status, parameter information and alarm prompts in real time; time printing is used for system time synchronization and data printing, which can provide time stamps, help track fault events corresponding to fault signals and subsequent data analysis; background monitoring is automated monitoring performed by the system, which can monitor the status and performance of the device to be controlled in real time; scheduling monitoring involves the management and scheduling of equipment, tasks or human resources.

[0052] In this embodiment, the human-machine interface interaction layer enables users to easily interact with the system through functions such as LCD display, time printing, background monitoring and scheduling monitoring, and efficiently manage and monitor the operating status of the devices to be controlled. This not only improves the intuitiveness of system operation, but also strengthens the tracking and management of key data, which helps to improve the safety and reliability of the overall system.

[0053] Furthermore, in one embodiment, the liquid crystal display is used to display the operating status of the device to be controlled, the data of the data acquisition and processing layer, and the strategy action information.

[0054] The operating status includes normal operation, fault, standby and other states; the strategic action information may include execution commands, state changes, fault handling measures, etc. The LCD not only displays the operating status of the device to be controlled at the human-machine interface interaction layer, but also provides real-time data and strategic action information at the data acquisition and processing layer, so that users can quickly obtain key information in a visual way, improve decision-making efficiency and operational safety, and thus achieve effective management and control of the device to be controlled.

[0055] In one embodiment, the operating status of the device to be controlled also includes the operating status of the hardware board, and the operating status of the hardware board includes the temperature, operating voltage and abnormal information of the hardware board.

[0056] Among them, the hardware board contains key electronic components; the operating status of the hardware board refers to its working condition, such as whether it is in operation, whether there is a fault or performance degradation, etc.; the temperature of the hardware board is too high or too low, which may cause hardware failure and affect the performance and life of the components; abnormal information refers to any abnormal status or error information that occurs during the operation of the hardware board, which may include error codes, fault alarms or other warning signals.

[0057] In this embodiment, by real-time monitoring of various indicators of the hardware board, including temperature, operating voltage and abnormal information parameters, the safety and stability of equipment operation can be effectively guaranteed, and maintenance or repair can be performed when a fault occurs.

[0058] Furthermore, in one embodiment, the system uses a high temperature material communication bus to transmit multi-channel data, and uses Ethernet, fiber optic communication technology, and a controller area network bus to transmit signals.

[0059] Among them, the High Temperature Material Communication Bus (HTM) communication bus can effectively ensure the stability and reliability of data; Ethernet has high-speed data transmission capabilities; fiber optic communication technology uses optical signals for data transmission, and compared with traditional cables, it has higher transmission speeds, longer transmission distances and stronger anti-interference capabilities; the Controller Area Network (CAN) bus allows multiple controllers and devices to communicate with each other efficiently through a bus system, which is suitable for real-time control and monitoring systems.

[0060] In this embodiment, by adopting a combination of high-temperature material communication bus, Ethernet, fiber optic communication technology and controller area network bus, stable, efficient and reliable data transmission can be achieved, ensuring that information transmission in complex environments is not interfered with, and optimizing the performance of the entire system.

[0061] In one embodiment, the protocol corresponding to the calibrated data includes a first protocol corresponding to the analog signal data and a second protocol corresponding to the first digital signal data.

[0062] Among them, analog signals are continuous and can represent infinite values. They are usually used to represent physical quantities, such as temperature, pressure, etc., and corresponding protocols are needed to sample, quantize and transmit these signals; correspondingly, digital signals represent information through discretization and are usually transmitted in binary form, and corresponding protocols are also needed to sample, quantize and transmit them; therefore, analog signal protocols focus on high fidelity and wide bandwidth, and need to accurately capture subtle changes, while digital signal protocols focus on high transmission rates and error correction mechanisms, and need to improve data transmission efficiency and reliability.

[0063] As an example, the first protocol may be the IEC61850 SMV (Sampled Measured Values) protocol, which is designed for real-time data transmission and meets the requirements for fast response and high precision; the second protocol may be the GOOSE (Generic Object Oriented Substation Event) protocol, which is used to transmit event information between devices in the power system, such as state changes, fault alarms, etc., and is suitable for scenarios that require fast response, such as protection control, automatic reclosing, etc.; however, the first protocol and the second protocol are not limited to the above protocols, and the content of the protocols may be set as required.

[0064] In this embodiment, by optimizing protocols for different signal categories, the efficiency and accuracy of data transmission are ensured; the transmission of digital signals is relatively less susceptible to noise, thereby improving the stability of the system; and different protocols can clearly distinguish signal types and their processing processes, making it easier to quickly locate and resolve faults when problems arise.

[0065] Furthermore, in one embodiment, Figure 4 As shown, the acquisition device (the device corresponding to the data acquisition device layer) 1 to the acquisition device n are used to accurately collect data and send it to the host command output. The main control device (the device corresponding to the main control device layer) is responsible for receiving and processing local and remote data and displaying the human-machine interface. The specific steps are as follows Figure 5 As shown, including:

[0066] Step S502, developing the internal communication architecture of the collection device.

[0067] Among them, the acquisition device uses HTM (High-Throughput Messaging) high-speed communication bus to realize the transmission of multi-channel large-capacity data between boards, and uses Ethernet, fiber optic communication technology, and CAN (Controller Area Network) bus technology to realize intelligent signal input or output.

[0068] Step S504, developing the sampling function, export function and data uploading function of the collection device.

[0069] Among them, the dual DSP (Digital Signal Processor) configuration realizes the protection and startup dual verification mechanism to ensure the accuracy of data collection; the export startup and action logic of the acquisition device are independently designed and implemented. The startup DSP is responsible for fault detection. When a fault is detected, the positive power supply of the export relay is opened. The protection DSP is responsible for the protection logic calculation to ensure that the export of the device is accurate and reliable; and the acquisition device uses the IEC61850 SMV protocol to send analog quantities and the GOOSE protocol to send switch quantities, and sends the relevant data to the main control device.

[0070] Step S506, developing the internal communication architecture of the main control device.

[0071] Similarly, the HTM high-speed communication bus is used inside the main control device to realize the transmission of multi-channel large-capacity data between boards, and Ethernet, fiber optic communication technology, and CAN bus technology are used to realize intelligent signal input or output.

[0072] Step S508, developing a data receiving and processing module of the main control device.

[0073] By integrating local collection and remote communication data, key information required for stable control strategies can be obtained.

[0074] Step S510, configuring the main control device software and the main control device human-computer interaction interface.

[0075] Among them, based on the standardized module database, relevant functions are selected through configuration to realize the combined stabilization control strategy, and the dual DSP redundant verification is used to accurately generate relevant control commands and measures, and the commands and measures are sent to the acquisition device or the remote device (the device corresponding to the remote communication module) export; the comprehensive operation status of the system is obtained, and the system operation status, acquisition analog quantity, system self-test information, input displacement information, strategy action information, etc. are displayed.

[0076] In the above embodiment, the HTM high-speed communication bus is used to realize the transmission of multi-channel large-capacity data between boards, and Ethernet, fiber optic communication technology, and CAN bus technology are used to realize intelligent signal input or output, thereby ensuring stable and reliable communication between levels; according to the functional division of each layer of the device, the overall architecture design of the system can be divided into two layers, among which the data information acquisition layer can be independently set up according to the standardization principle, and the interface and protocol of the data processing layer are standardized, thereby realizing the decoupling of the on-site acquisition device, and especially simplifying the configuration of the stabilization control device; the strategy logic processing layer and the human-computer interface interaction layer are combined into one layer to realize the strategy control and human-computer interaction of the stabilization control system.

[0077] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", "ideal embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0078] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0079] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A safe and stable control system applied to a power system, characterized in that: The system includes a data acquisition processing layer, a strategy logic standardization processing layer, and a human-computer interface interaction layer; The data acquisition processing layer is used to acquire analog signal data and first digital signal data of the device to be controlled, convert the analog signal data into second digital signal data using an analog-to-digital converter, and then calibrate the first digital signal data and the second digital signal data based on a first digital signal processor to obtain calibrated data; The strategy logic standardization processing layer is used to receive the calibrated data, and generate control instructions and control measures after recalibrating the calibrated data based on the second digital signal processor; The human-machine interface interaction layer is used to receive the control instructions and the control measures, and complete the control of the device to be controlled based on the control instructions and the control measures.

2. The system according to claim 1, characterized in that The data acquisition and processing layer also includes conventional mutual inductors, electronic mutual inductors and intelligent inputs; The conventional transformer is used to collect the analog signal data; the intelligent input and the electronic transformer are used to collect the first digital signal data.

3. The system according to claim 2, characterized in that The sampling frequency of the analog signal data is not less than 4000 Hz.

4. The system according to claim 1, characterized in that The data acquisition processing layer also includes an exit relay and a start relay; the first digital signal processor includes a first sub-digital signal processor and a second sub-digital signal processor; The output relay is connected to the first sub-digital signal processor and the second sub-digital signal processor, and the start relay is connected to the output relay, the first sub-digital signal processor and the positive power supply. When the first sub-digital signal processor detects a fault signal, the fault signal is input into the start relay to open the positive power supply of the output relay, and the second sub-digital signal processor performs protection logic calculation. When the result of the protection logic calculation meets the action condition, the output relay is driven to operate.

5. The system according to claim 1, characterized in that The policy logic standardization processing layer also includes a data processing module, a remote communication module and a communication interface; The data processing module is connected to the communication interface and the remote communication module respectively. The data processing module is used to receive the communication data of the remote communication module, and to receive the calibrated data of the data acquisition processing layer through the communication interface, and to process the communication data and the calibrated data to obtain the operating status of the device to be controlled.

6. The system according to claim 1, characterized in that The human-machine interface interaction layer is also used for liquid crystal display, time synchronization printing, background monitoring and scheduling monitoring.

7. The system according to claim 6, characterized in that The liquid crystal display is used to display the operating status of the device to be controlled, data from the data acquisition and processing layer, and strategic action information.

8. The system according to claim 7, characterized in that The operating status of the device to be controlled also includes the operating status of the hardware board, and the operating status of the hardware board includes the temperature, operating voltage and abnormal information of the hardware board.

9. The system according to claim 1, characterized in that The system adopts a high temperature material communication bus to transmit multi-channel data, and adopts Ethernet, optical fiber communication technology and controller area network bus to transmit signals.

10. The system according to claim 1, characterized in that The protocol corresponding to the calibrated data includes a first protocol corresponding to the analog signal data and a second protocol corresponding to the first digital signal data.

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