Relay protection analog simulation system

Abstract

The invention discloses a relay protection analog simulation system, which belongs to the technical field of relay simulation and comprises a relay simulation terminal module, the relay simulation terminal module is in signal connection with a hardware technical parameter adjusting module, and the hardware technical parameter adjusting module is in signal connection with a core function module. According to the invention, by simulating faults with different severity degrees, the action performance of the relay protection device under extreme conditions can be comprehensively verified, it is ensured that the protection device can accurately and rapidly respond to the faults in actual operation, expansion of the faults of the power system is prevented, and safe and stable operation of the power system is ensured; meanwhile, various data in the simulation process can be collected and recorded in real time through the data analysis and recording module, deep analysis and processing are carried out, then the data provide precious basis for fault analysis and protection device optimization, and a user is helped to further improve the reliability and safety of a relay protection system.

Description

Technical Field

[0001] The present invention belongs to the technical field of relay simulation, in particular to a relay protection simulation system. Background Art

[0002] With the continuous development and increasing complexity of power systems, relay protection, as a crucial measure to ensure safe and stable operation, faces increasing demands for performance and reliability. Traditional relay protection device testing methods often rely on on-site testing of actual power systems, which has numerous limitations. For example, field testing is affected by a variety of factors, such as environmental conditions and equipment operating status, making it difficult to provide a stable and repeatable testing environment. Furthermore, field testing consumes significant manpower, material resources, and time, and carries certain safety risks.

[0003] However, existing relay protection simulation systems still have some deficiencies in functionality and performance. For example, some systems cannot accurately simulate the complex topology and fault characteristics of power systems; some systems have limitations in data collection and analysis, making it difficult to provide comprehensive and in-depth test results; and some systems lack flexibility and scalability, failing to meet users' diverse testing needs. Furthermore, some systems cannot meet the basic practical skills training needs of relay protection production personnel and improve the core business capabilities of relay protection operation and maintenance teams. Summary of the Invention

[0004] The purpose of the present invention is to provide a relay protection simulation system to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a relay protection simulation system, comprising a relay simulation terminal module, wherein the relay simulation terminal module is signal-connected to a hardware technical parameter adjustment module, and the hardware technical parameter adjustment module is signal-connected to a core function module, and the core function module is signal-connected to an auxiliary support recording module, wherein the hardware technical parameter adjustment module can ensure simulation accuracy and adapt to different protection devices;

[0006] As a further preferred embodiment of this technical solution: the relay simulation process is as follows:

[0007] S1: Use the hardware technical parameter adjustment module to set the system's technical parameters according to requirements, including accuracy, sampling frequency, and analog output range;

[0008] S2: Simulates various power system topologies, including different voltage levels, transmission lines, transformers, generators and other components, providing a realistic operating environment for relay protection devices;

[0009] S3: Simulate various types and severity of faults;

[0010] S4: Perform functional testing, performance evaluation and setting value verification on various relay protection devices;

[0011] S5: Real-time collection and recording of various data during the simulation process, and analysis and processing;

[0012] S6: Intuitively display the operating status of the power system, fault location, and protection device operation status through a graphical interface;

[0013] As a further preferred embodiment of the present technical solution: the parameters adjusted by the hardware technical parameter adjustment module include: current and voltage accuracy, sampling frequency, analog output range, switch input and output settings, fault simulation capability settings, and communication interface settings. At the same time, the current and voltage measurement accuracy is generally required to reach 0.1%-0.5% to accurately simulate the electrical quantities in the power system, and the sampling frequency is generally several kilohertz to tens of kilohertz. The output range of the analog quantity: the voltage output range is generally 0-100V or higher, the current output range is 0-5A or 0-1A, the switch input and output settings can provide a sufficient number of switch input and output channels, not less than 8 channels, for simulating the status of circuit breakers, disconnectors, etc. The fault transition resistance of the fault simulation capability setting can be in the range of 0-1000Ω, and the communication interfaces include: RS-232, RS-485, and Ethernet;

[0014] As a further preferred embodiment of the present technical solution: the core functional modules include: a power system topology simulation unit, a fault simulation and testing unit, a protection device testing unit, and a training and teaching unit;

[0015] As a further preferred embodiment of the present technical solution: the power system topology structure of the power system topology simulation unit in the core functional module includes: single power source radial type, dual power source ring network type, multi-power source ring network type, tree structure, and hybrid structure, so that users can flexibly configure the system topology structure according to actual needs, including adding or deleting components such as generators, transformers, and transmission lines;

[0016] As a further preferred embodiment of the present technical solution: the fault simulation and test unit in the core functional module is divided into three-phase short circuit, two-phase short circuit, single-phase grounding, faults of power stations, transmission lines, and substations, among which three-phase short circuit, two-phase short circuit, and single-phase grounding short circuit are short circuit faults, and faults of power stations, transmission lines, and substations are open circuit faults. At the same time, the fault simulation and test unit can also simulate other types of faults such as overvoltage, undervoltage, overfrequency, and underfrequency;

[0017] As a further preferred embodiment of the present technical solution: the test range of the protection device test unit in the core functional module is divided into: overcurrent protection test, differential protection test, distance protection test, grounding protection test, and reaction sensitivity test, and the overcurrent protection test can verify the action characteristics of the protection device under overcurrent conditions, the differential protection test can verify the action characteristics of the protection device under internal and external faults of the transformer or busbar, the distance protection test can verify the action characteristics of the protection device under short-circuit faults at different distances, and the grounding protection test can verify the action characteristics of the grounding protection device under various grounding fault conditions, ensuring that it can act reliably and quickly, thereby protecting the safety of equipment and personnel;

[0018] As a further preferred embodiment of the present technical solution: the auxiliary support recording module includes: a data analysis and recording module, a visualization display module, and the data analysis and recording module can collect and record various data in the simulation process in real time, such as voltage, current, protection device action time, etc., and analyze and process them to provide a basis for fault analysis and protection device optimization. Secondly, the visualization display module can intuitively display information such as the operating status of the power system, fault location, protection device action status, etc. through a graphical interface, which is convenient for users to observe and analyze.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the present invention, by simulating various power system topologies and fault types, a real and comprehensive testing environment is provided for relay protection devices, which greatly shortens the test cycle of the device in the actual power system, reduces the testing cost, and improves the accuracy and reliability of the test. Secondly, it can perform functional testing, performance evaluation and setting value verification on various types of relay protection devices, helping users to quickly identify the performance bottlenecks and optimization directions of the device, thereby improving the overall performance of the device.

[0021] 2. In the present invention, by simulating faults of different severity, the operating performance of the relay protection device under extreme conditions can be fully verified, which helps to ensure that the protection device can respond to faults accurately and quickly in actual operation, prevent the expansion of power system faults, and ensure the safe and stable operation of the power system. At the same time, through the data analysis and recording module, various data in the simulation process can be collected and recorded in real time, and in-depth analysis and processing can be carried out. Secondly, these data provide a valuable basis for fault analysis and protection device optimization, which helps users further improve the reliability and safety of the relay protection system.

[0022] 3. In the present invention, by providing a flexible and customizable power system topology simulation unit and a fault simulation and testing unit, it can support users to conduct simulation tests of various complex scenarios according to actual needs, which helps to promote the continuous innovation and development of relay protection technology and meet the growing complexity and diversity needs of the power system. At the same time, through the training and teaching unit, it can have training and teaching functions, which can help users deeply understand the principles and technical details of relay protection and improve the user's professional skills. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a flow chart of the relay protection simulation system of the present invention;

[0024] Figure 2 This is an operation flow chart of the relay protection simulation system of the present invention. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example

[0027] See also Figure 1 - Figure 2 As shown, the present invention provides a technical solution: a relay protection simulation system, comprising a relay simulation terminal module, wherein the relay simulation terminal module is signal-connected to a hardware technical parameter adjustment module, and the hardware technical parameter adjustment module is signal-connected to a core function module, and the core function module is signal-connected to an auxiliary support recording module;

[0028] In this embodiment, the relay simulation process is specifically as follows:

[0029] S1: Use the hardware technical parameter adjustment module to set the system's technical parameters according to requirements, including accuracy, sampling frequency, and analog output range;

[0030] S2: Simulates various power system topologies, including different voltage levels, transmission lines, transformers, generators and other components, providing a realistic operating environment for relay protection devices;

[0031] S3: Simulate various types and severity of faults;

[0032] S4: Perform functional testing, performance evaluation and setting value verification on various relay protection devices;

[0033] S5: Real-time collection and recording of various data during the simulation process, and analysis and processing;

[0034] S6: Intuitively display the operating status of the power system, fault location, and protection device operation status through a graphical interface;

[0035] In this embodiment, specifically, the parameters adjusted by the hardware technical parameter adjustment module include: current and voltage accuracy, sampling frequency, analog output range, switch input and output settings, fault simulation capability settings, communication interface settings, and the analog output voltage range table is as follows:

[0036]

[0037] In this embodiment, specifically: the core functional modules include: a power system topology simulation unit, a fault simulation and testing unit, a protection device testing unit, and a training and teaching unit. The training and teaching unit simulates actual scenarios to enable trainees to become familiar with the operating procedures of relay protection devices, including parameter setting and fault handling.

[0038] In this embodiment, specifically: the power system topology structure of the power system topology simulation unit in the core functional module includes: single power radial type, dual power ring network type, multi-power ring network type, tree structure, and hybrid structure. Secondly, the single power radial type topology structure only requires one main transmission line, the construction cost is relatively low, the structure is simple, and it is easy to design and maintain. The dual power ring network type topology structure has a relatively complex structure and requires more complex protection devices and control strategies, which is not convenient for maintenance. The multi-power ring network type topology structure consists of multiple power points and ring lines, and requires more complex protection devices for protection. Then, the single power radial type, dual power ring network type, multi-power ring network type, tree structure, and hybrid structure have higher requirements on the quality and capacity of the protection device in turn, so that the power system topology structure of the power system topology simulation unit can be changed, and the function and efficiency of the protection device can be tested from simple to difficult;

[0039] In this embodiment, specifically: the fault simulation of the fault simulation and testing unit in the core functional module is divided into: three-phase short circuit, two-phase short circuit, single-phase ground fault, power station, transmission line, and substation faults. Secondly, the fault simulation and testing unit can set the specific location of the fault, such as a certain position on the transmission line or a certain side of the transformer. At the same time, the size of the fault transition resistance can be set in the range of 0-1000Ω and the duration of the fault can be set, thereby enabling the relay protection device to be tested in various aspects;

[0040] In this embodiment, specifically, the test scope of the protection device test unit in the core function module is divided into: overcurrent protection test, differential protection test, distance protection test, ground protection test, and reaction sensitivity test, and the test scope is summarized in the following table:

[0041]

[0042]

[0043] In this embodiment, specifically: the auxiliary support recording module includes: a data analysis and recording module, a visualization display module, and the data analysis and recording module can record electrical quantities such as voltage, current, power, frequency, etc., and at the same time save switch position changes and protection device action events. Secondly, it supports CSV, Excel, and SQL databases, and is compatible with COMTRADE's data storage format. The visualization display module can display the power grid structure and equipment status of the relay simulation system in real time, and animate the protection action path of the protection device.

[0044] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. The relay protection simulation system includes a relay simulation terminal module, which is characterized by: The relay simulation terminal module signal is connected to the hardware technical parameter adjustment module, and the hardware technical parameter adjustment module signal is connected to the core function module, while the core function module signal is connected to the auxiliary support recording module.

2. The relay protection simulation system according to claim 1, characterized in that: The relay simulation process is as follows: S1: Use the hardware technical parameter adjustment module to set the system's technical parameters according to requirements, including accuracy, sampling frequency, and analog output range; S2: Simulates various power system topologies, including different voltage levels, transmission lines, transformers, generators and other components, providing a realistic operating environment for relay protection devices; S3: Simulate various types and severity of faults; S4: Perform functional testing, performance evaluation and setting value verification on various relay protection devices; S5: Real-time collection and recording of various data during the simulation process, and analysis and processing; S6: The operating status of the power system, fault location, and protection device operation status are intuitively displayed through a graphical interface.

3. The relay protection simulation system according to claim 2, characterized in that: The parameters adjusted by the hardware technical parameter adjustment module include: current and voltage accuracy, sampling frequency, analog output range, switch input and output settings, fault simulation capability settings, and communication interface settings.

4. The relay protection simulation system according to claim 3, characterized in that: The core functional modules include: power system topology simulation unit, fault simulation and testing unit, protection device testing unit, and training and teaching unit.

5. The relay protection simulation system according to claim 4, characterized in that: The power system topology structure of the power system topology simulation unit in the core functional module includes: single power supply radial type, dual power supply ring network type, multi-power supply ring network type, tree structure, and hybrid structure.

6. The relay protection simulation system according to claim 5, characterized in that: The fault simulation in the core functional module and the fault simulation of the test unit are divided into: three-phase short circuit, two-phase short circuit, single-phase grounding, and faults of power stations, transmission lines, and substations.

7. The relay protection simulation system according to claim 6, characterized in that: The test scope of the protection device test unit in the core function module is divided into: overcurrent protection test, differential protection test, distance protection test, grounding protection test, and response sensitivity test.

8. The relay protection simulation system according to claim 7, characterized in that: The auxiliary support recording module includes: a data analysis and recording module and a visual display module.

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