Simulation test system and method for safety and stability control device

Abstract

The invention relates to the technical field of power grid safety and stability control system testing, in particular to a safety and stability control device simulation testing system and method. The system comprises a test scheme design module used for generating a test scheme according to configuration and sending the test scheme to an automatic test control center; the automatic test control center is used for calling the tester interface module according to the test scheme and simultaneously driving each simulation test device; the simulation test equipment is used for sending a plurality of synchronously output analog quantities to the safety and stability control device connected with the simulation test equipment; the safety and stability control device is used for generating test data according to the analog quantity; test data is sent to the automatic test control center through the simulation test device and the tester interface module in sequence, and the automatic test control center generates a test report according to a test scheme and the summarized test data. According to the invention, test schemes of stability control systems of various scales are flexibly formulated, the test cost is reduced, the test efficiency is improved, and the workload of testers is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid safety and stability control system testing, and in particular to a safety and stability control device simulation testing system and method. Background Art

[0002] With the rapid development of the economy and the rapid development of new power technologies, the scale and complexity of power systems have increased dramatically, bringing unprecedented challenges to their safe and stable operation. In this context, it is particularly important to build and strengthen the second line of defense for the safe and stable operation of power systems. Among them, the performance and reliability of the safe and stable control system as a core component are directly related to the stability and efficiency of the entire power grid. The safe and stable control system must have the ability to process massive power grid operation information in real time, covering fast and reliable data exchange within the regional power grid, between regions, between system hosts and slaves, and with other automation systems, in order to cope with the complex and stable control requirements of modern power grids such as AC / DC hybrid and power electronics. However, in the key link of testing and debugging, there are currently multiple technical difficulties and challenges.

[0003] How to improve the application efficiency of safety and stability control devices through reliable and effective testing, verify control strategies and fault criteria with maximum coverage, and reduce defects and errors has become an urgent problem to be solved. At present, the problems faced in the testing and debugging process are that there are many types of safety and stability control devices, and secondary development accounts for a large proportion. On the other hand, the high complexity of the stability control system has brought challenges to the on-site debugging work, mainly manifested in: different manufacturers have different equipment models, geographical locations are scattered, the communication message format interface rates used are also different, and the control strategy of large-scale stability control systems is complex. In the testing and debugging process, it involves software control logic verification, the correctness and effectiveness of fault criteria, and the rationality of strategy table formulation. Especially in the commissioning and acceptance of large-scale regional stability control systems, high requirements are placed on the coordination and cooperation between personnel and stations.

[0004] Existing testing methods mainly rely on manual single-device testing, which is a single and inefficient method, and the detection equipment has limited functions, making it difficult to fully simulate scenarios such as multi-device coordination and complex faults that may be encountered in actual operation. In the system testing composed of multiple devices, there is a lack of automated and intelligent testing methods, resulting in long test cycles, high costs, and difficulty in ensuring the comprehensiveness and accuracy of test results. Specifically, the correctness of the software control logic, the effectiveness of the fault judgment criteria, and the rationality of the strategy table must be verified during the testing process. Especially in the commissioning and acceptance stage of large-scale regional stabilization and control systems, the requirements for personnel skills and coordination between stations are extremely high, which further increases the difficulty of testing and debugging. Summary of the invention

[0005] The purpose of the present invention is to provide a safety and stability control device simulation test system and method in order to solve at least one of the above technical problems. The test scheme design module of the present invention edits the control strategy table and generates the corresponding test scheme according to the characteristics of the safety and stability control device. The automatic test control center drives multiple simulation test devices through the tester interface module to output multiple simulation quantities according to the designed test scheme. The test data and test results are fed back to the automatic test control center through the tester interface module for test report generation, completing the automatic closed-loop test function of the entire system, greatly reducing the workload of testers, and providing a simplified and automated test method for the test of the safety and stability control device, overcoming the shortcomings of the existing safety and stability control device test method.

[0006] The present invention provides a safety and stability control device simulation test system, comprising:

[0007] The test plan design module is used to generate the test plan according to the configuration and send it to the automatic test control center;

[0008] The automatic test control center is used to call the tester interface module according to the test plan and drive each simulation test device at the same time;

[0009] The simulation test device is used to send multiple synchronously output analog quantities to the safety and stability control device connected thereto;

[0010] The safety and stability control device is used to generate test data according to the simulation quantity;

[0011] The test data is sent to the automatic test control center through the simulation test equipment and the tester interface module in sequence, and the automatic test control center generates a test report according to the test plan and the summarized test data.

[0012] Furthermore, the test scheme design module receives the editing of the functional test scheme, and the test scheme design module includes a parameter configuration menu and an electrical quantity setting menu.

[0013] Furthermore, the functional test scheme includes: control strategy table, low-frequency and low-voltage load reduction, high-frequency overvoltage cutting or disconnection, loss of step disconnection, and overload.

[0014] Further, the parameter configuration menu is used to configure the voltage and current signals of each simulation test device and associate each test device parameter;

[0015] The electrical quantity setting menu is used to set the test phase, voltage parameters, frequency parameters, and test parameters;

[0016] The test scheme design module automatically generates a test scheme according to the parameter configuration menu and the electrical quantity setting menu.

[0017] Furthermore, the tester interface module is connected to a plurality of simulation test devices via a switch.

[0018] Furthermore, the tester interface module is associated with each simulation test device one by one by configuring the IP address, each simulation test device is distinguished by a different IP address, and the connection status of each simulation test device is displayed on the device.

[0019] Furthermore, each test scheme includes multiple virtual logic testers, each logic tester has multiple logic channels, and the multiple logic channels can be arbitrarily combined into various component combinations required by the user. Each logic tester contains a set of three-phase voltage and three-phase current.

[0020] Furthermore, the output end of the simulation test equipment is connected to the analog input test interface of the safety and stability control device.

[0021] Furthermore, the simulation test equipment can simultaneously output a maximum of 48 ±5V analog quantities, 4 optocoupler isolation outputs, and 2 optocoupler isolation inputs.

[0022] The present invention also provides a safety and stability control device simulation test method, which is applied to any safety and stability control device simulation test system, and the method comprises:

[0023] Input the functional test plan and generate the test plan through the test plan design module;

[0024] Simultaneously drive each simulation test device according to the test scheme;

[0025] The simulation test device sends multiple synchronously output analog quantities to the safety and stability control device connected thereto;

[0026] The safety and stability control device generates test data according to the simulation quantity;

[0027] The test data is sent to the automatic test control center through the simulation test equipment and the tester interface module in sequence, and the automatic test control center generates a test report according to the test plan and the summarized test data.

[0028] The beneficial effects of the present invention are:

[0029] The present invention configures the parameters of associated test equipment through a test scheme design module, edits the control strategy table according to the characteristics of a safety and stability control device, and generates a corresponding test scheme; an automatic test control center drives multiple simulation test devices through a tester interface module to output multiple analog quantities according to the designed test scheme, and the test data and test results are fed back to the automatic test control center through the tester interface module for test report generation, thereby completing the automatic closed-loop test function of the entire system, greatly reducing the workload of testers, and providing a simplified and automated test method for testing safety and stability control devices.

[0030] The present invention can solve the problems of single testing means, insufficient detection equipment and drawbacks in the single device testing process during the safety and stability control device testing process, and provide a highly efficient and convenient automatic testing method for the safety and stability control device, thereby achieving the purpose of reducing personnel requirements, simplifying the work process and improving testing efficiency.

[0031] The present invention forms a star topology network through a tester interface module, a test scheme design module, an automatic test control center, a plurality of simulation test devices (up to 10) and a switch. The weak current AC signal output by the simulation test device is directly output to the analog input test interface of the stabilization control device through a flat cable. The automatic test control center manages multiple simulation test devices simultaneously through the tester interface module. This test method is suitable for testing stabilization control devices and debugging large-scale regional stabilization control systems. It can synchronously simulate various fault scenarios of up to 80 independent full-phase components and effectively verify the complex strategy logic functions of the stabilization control system.

[0032] The present invention can be applied to systems of various types and sizes, realizes comprehensive testing of safe and stable control systems, is suitable for on-site settings, has low testing costs, and has important practical significance in improving test efficiency and test coverage. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of the structure of a simulation test system for a safety and stability control device according to an embodiment of the present invention;

[0034] Figure 2 A flow chart of a simulation test method for a safety and stability control device according to an embodiment of the present invention;

[0035] Figure 3 This is a flow chart of a simulation test method for a safety and stability control device according to another embodiment of the present invention. DETAILED DESCRIPTION

[0036] The content of the present invention will now be discussed with reference to exemplary embodiments. It should be understood that the embodiments discussed are only to enable those skilled in the art to better understand and thus implement the content of the present invention, rather than implying any limitation on the scope of the present invention.

[0037] As used herein, the term “including” and variations thereof are to be interpreted as open-ended terms meaning “including, but not limited to.” The term “based on” is to be interpreted as “based, at least in part, on.” The terms “one embodiment” and “an embodiment” are to be interpreted as “at least one embodiment.”

[0038] Embodiment 1

[0039] Figure 1 FIG. 1 is a schematic diagram of the structure of a simulation test system for a safety and stability control device according to an embodiment of the present invention. Figure 1 As shown, according to one embodiment of the present invention, a safety and stability control device simulation test system includes:

[0040] The test plan design module is used to generate the test plan according to the configuration and send it to the automatic test control center;

[0041] Automatic test control center, used to call the tester interface module according to the test plan and drive various simulation test equipment at the same time;

[0042] A simulation test device, used for sending multiple synchronously output analog quantities to a safety and stability control device connected thereto;

[0043] A safety and stability control device for generating test data based on simulated quantities;

[0044] The test data is sent to the automatic test control center through the simulation test equipment and the tester interface module in turn. The automatic test control center generates a test report based on the test plan and the summarized test data.

[0045] In this embodiment, the simulation test system of the safety and stability control device includes: a test scheme design module, an automatic test control center, a simulation test device, a safety and stability control device, and a tester interface module. First, the test scheme design module edits a variety of functional test schemes according to user configuration or preset standards, and sends these test schemes to the automatic test control center. After receiving the test scheme, the automatic test control center calls the tester interface module to realize centralized control of multiple simulation test devices through the switch as a communication bridge, ensuring that all simulation test devices can synchronously output multiple analog signals. These analog signals accurately simulate the key parameters such as voltage and current in the actual power system, providing a solid foundation for subsequent tests. After receiving the instructions from the automatic test control center, the simulation test device responds quickly and sends the multiple synchronously output analog signals directly to the safety and stability control device connected to it. After receiving these analog signals, the safety and stability control device generates corresponding test data according to its built-in control logic and algorithm. Subsequently, the test data is transmitted back to the tester interface module through the simulation test device, and then further forwarded to the automatic test control center via the tester interface module. The automatic test control center comprehensively summarizes and analyzes the collected test data, combines it with the original test plan, and finally generates a detailed and accurate test report. This test report not only records the key data during the test process, but also includes the analysis and evaluation of the test results, providing an important reference for subsequent debugging and optimization.

[0046] A safety and stability control device simulation test system comprises a safety and stability control device, a simulation test device, a tester interface module, a test scheme design module and an automatic test control center. The safety and stability control device is connected to the corresponding simulation test device. The simulation test device communicates with the tester interface module via a switch. Both the test scheme design module and the tester interface module communicate data with the automatic test control center. The automatic test control center outputs a test report by executing the test scheme and processing the test data.

[0047] The present invention realizes full automation of the test of the safety and stability control device, improves the test efficiency and accuracy, and provides a reliable verification means for the stable control of the power system. The system of the present invention is suitable for the actual connection on site, has comprehensive coverage points, and has high system versatility.

[0048] According to an embodiment of the present invention, the test scheme design module receives the editing of the functional test scheme, and the test scheme design module includes a parameter configuration menu and an electrical quantity setting menu.

[0049] Preferably, the functional test scheme includes: control strategy table, low-frequency and low-voltage load reduction, high-frequency overvoltage cutting or disconnection, loss of step disconnection, and overload.

[0050] Preferably, the parameter configuration menu is used to configure the voltage and current signals of each simulation test device and associate each test device parameter;

[0051] The electrical quantity setting menu is used to set the test phase, voltage parameters, frequency parameters, and test parameters;

[0052] The test scheme design module automatically generates test schemes based on the parameter configuration menu and the electrical quantity setting menu.

[0053] In this embodiment, the test scheme design module integrates the parameter configuration menu and the electrical quantity setting menu, providing users with the ability to flexibly edit various functional test schemes. Through the parameter configuration menu, users can finely set the output channels and transformation ratios of voltage and current signals for each simulation test device, so as to adapt to the test requirements of stable control systems of different scales. At the same time, the electrical quantity setting menu allows users to define test phases, voltage parameters, frequency parameters and specific test parameters to ensure that the test scheme can accurately simulate the complex working conditions in the actual power system. In the process of test scheme design, users can easily complete the editing of various functional test schemes such as control strategy table, low-frequency and low-voltage load reduction, high-frequency overvoltage cutting or decoupling, out-of-step decoupling, overload, etc. through these two menus. Once the test scheme is determined, the automatic test control center will respond quickly, call the tester interface module and drive multiple simulation test devices simultaneously through the switch to achieve the synchronous output of multiple analog signals. These analog signals accurately simulate the changes in key electrical parameters in the power system, providing a real and reliable test environment for safe and stable control devices. During the test, the tester interface module is responsible for real-time capture of test data generated by the safety and stability control device, including but not limited to the machine shedding action value, low-frequency load shedding action value and action time, low-voltage load shedding action value and action time, over-frequency machine shedding action value and action time, over-voltage decoupling action value and action time, overload action value and action time and other key information. These data are then fed back to the automatic test control center for comprehensive summary and in-depth analysis. Finally, the automatic test control center automatically generates a detailed and accurate test report based on the test plan and the collected test data, providing a valuable reference for the commissioning and optimization of the power system stability control device.

[0054] The parameter configuration menu can flexibly configure the analog output channel of each simulation test device as voltage or current input and transformation ratio, and formulate test plans for various scales of stable control systems. The test plan design module completes the editing of functional test plans such as control strategy table, low-frequency and low-voltage load reduction, high-frequency overvoltage cutting or decoupling, loss of step decoupling, overload, etc. The automatic test control center calls the tester interface module while executing the test plan to drive multiple simulation test devices through the switch to achieve multiple analog quantity synchronous output. The tester interface module obtains the test data and feeds it back to the automatic test control center. The test data obtained by the tester interface module include the action value of cutting machine and load, the action value and action time of low-frequency load reduction, the action value and action time of low-voltage load reduction, the action value and action time of overfrequency cutting machine, the action value and action time of overvoltage decoupling, and the action value and action time of overload. The test plan design module completes the editing of functional test plans such as control strategy table, low-frequency and low-voltage load reduction, high-frequency overvoltage cutting or decoupling, loss of step decoupling, overload, etc.

[0055] The test scheme design module of the present invention realizes flexible editing and accurate simulation of various functional test schemes by integrating parameter configuration and electrical quantity setting menus, providing a comprehensive and realistic test environment for safety and stability control devices; by synchronously outputting multiple analog signals and capturing test data in real time, detailed test reports are automatically generated, effectively improving the debugging and optimization efficiency of power system stability control devices.

[0056] According to an implementation manner of the present invention, the tester interface module is connected to a plurality of simulation test devices via a switch.

[0057] In this embodiment, the tester interface module can drive 10 simulation test devices through the switch, and the communication between the two uses a Category 5e shielded twisted pair. The automatic test control center calls the tester interface module while executing the test plan to drive multiple simulation test devices through the switch to achieve multiple analog quantity synchronous outputs. The tester interface module obtains the test data and then feeds it back to the automatic test control center.

[0058] The tester interface module of the present invention efficiently connects and drives up to 10 simulation test devices through a switch, adopts Category 5e shielded twisted pair to ensure communication quality, realizes synchronous output of multiple analog quantities and real-time feedback of test data, and significantly improves the integration and test efficiency of the test system.

[0059] According to one embodiment of the present invention, the tester interface module is associated with each simulation test device one by one by configuring the IP address, each simulation test device is distinguished by a different IP address, and the connection status of each simulation test device is displayed on it.

[0060] In this implementation, the tester interface module is associated with each simulation test device one by one by configuring the IP address. Each simulation test device is distinguished by a different IP address. When the connection is normal, a green "√" will be marked and a prompt "This simulation test device is connected" will be displayed. When the connection is interrupted, a red "×" will be marked and a prompt "This simulation test device has been disconnected" will be displayed.

[0061] The tester interface module of the present invention corresponds to each simulation test device one by one by configuring a unique IP address, thereby ensuring that each device can be accurately identified and controlled; each simulation test device displays its connection status in real time, which is convenient for monitoring and maintenance.

[0062] According to one embodiment of the present invention, each test scheme includes multiple virtual logic testers, each logic tester has multiple logic channels, and the multiple logic channels can be arbitrarily combined into various component combinations required by the user. Each logic tester contains a set of three-phase voltage and three-phase current.

[0063] In this embodiment, the most basic test unit included in the test scheme is a virtual logic tester. Each logic tester has 6 logic channels. These logic channels can be arbitrarily combined into various component combinations required by the user. Each logic tester contains a set of three-phase voltage and three-phase current. Each simulation test device corresponds to 8 logic testers. In order to simulate the scenario where multiple components have the same fault at the same time, several (up to 8) simulation test devices can be associated with the same logic tester. When the automatic test control center executes this test scheme, several simulation test devices will have exactly the same analog output.

[0064] The test solution of the present invention supports flexible virtual logic tester configuration, each logic tester includes a plurality of freely combinable logic channels, and each channel provides a set of three-phase voltage and three-phase current to meet the diverse test requirements of users.

[0065] According to an implementation manner of the present invention, the output end of the simulation test equipment is connected to the analog input test interface of the safety and stability control device.

[0066] Preferably, the simulation test equipment can simultaneously output up to 48 channels of ±5V analog quantities, 4 channels of optocoupler isolation outputs, and 2 channels of optocoupler isolation inputs.

[0067] In this implementation, the simulation test equipment is directly output to the analog input test interface of the stabilization control device through a flat cable. The simulation test equipment can simultaneously output up to 48 ±5V analog quantities, 4 optocoupler isolation outputs, and 2 optocoupler isolation inputs. The switching quantity of the simulation test equipment requires an external 24V power supply, the common end of the optocoupler isolation output is connected to the +24V power supply, and the common end of the optocoupler isolation input is connected to the -24V power supply. The optocoupler isolation input is generally used to capture the output quantity of the safety and stability control device under test, and the optocoupler isolation output is generally used to provide the input quantity to the safety and stability control device under test.

[0068] The simulation test equipment of the present invention realizes efficient data interaction by directly connecting to the analog input interface of the stabilization control device, and its powerful output capability ensures the comprehensiveness and accuracy of the test; through the external 24V power supply and optocoupler isolation design, it not only ensures the flexibility of the test, but also enhances the electrical isolation and safety of the test, providing reliable technical support for the testing of safe and stable control devices.

[0069] The present invention provides a simulation test system and method for a safety and stability control device, including: a safety and stability control device, a simulation test device, a tester interface module, a test scheme design module and an automatic test control center; the simulation test device directly outputs to the analog input test interface of the stability control device through a flat cable; the simulation test device can simultaneously output a maximum of 48 ±5V analog quantities, 4 optocoupler isolation outputs, and 2 optocoupler isolation inputs; the switching quantity of the simulation test device requires an external 24V power supply, the optocoupler isolation output common end is connected to the +24V power supply, and the optocoupler isolation input common end is connected to the -24V power supply. The optocoupler isolation input is generally used to capture the output quantity of the safety and stability control device under test, and the optocoupler isolation output is generally used to provide the input quantity to the safety and stability control device under test; the tester interface module can drive 10 simulation test devices through a switch. The communication between the two uses a Category 5e shielded twisted pair cable.

[0070] The simulation test system for the safety and stability control device of the present invention realizes a fully automated simulation test of the safety and stability control device of the power system by integrating a test scheme design module, an automatic test control center, a simulation test device and a tester interface module. The system supports precise simulation and synchronous output of multiple channels and multiple parameters, can capture and analyze test data in real time, and automatically generate detailed test reports. The use of Category 5e shielded twisted pair and switch connection ensures the stability and efficiency of communication. The design of the simulation test equipment provides up to 48 ±5V analog outputs and optocoupler isolated input and output, enhancing the flexibility and safety of the test. On the whole, the system greatly improves the test efficiency, accuracy and versatility, and provides an efficient and reliable technical means for the debugging, optimization and verification of the stability control device of the power system.

[0071] Embodiment 2

[0072] Figure 2 This is a flow chart of a simulation test method for a safety and stability control device according to an embodiment of the present invention. Figure 2 As shown, according to an embodiment of the present invention, a safety and stability control device simulation test method is applied to any safety and stability control device simulation test system in Example 1, and the method includes the following steps:

[0073] Step S102: inputting a functional test plan through a test plan design module and generating a test plan;

[0074] Step S104: driving each simulation test device simultaneously according to the test plan;

[0075] Step S106: the simulation test device sends the multiple analog quantities output synchronously to the safety and stability control device connected thereto;

[0076] Step S108: the safety and stability control device generates test data according to the simulation value;

[0077] Step S110: the test data is sent to the automatic test control center through the simulation test equipment and the tester interface module in sequence, and the automatic test control center generates a test report according to the test plan and the summarized test data.

[0078] In this embodiment, a simulation test method for a safety and stability control device is applied to the simulation test system of the first embodiment. In step S102, the user uses the test scheme design module to input a detailed functional test scheme. The module can intelligently generate a structured test scheme based on the input content to provide clear guidance for subsequent tests. In step S104, the system synchronously drives all simulation test devices involved in the test according to the generated test scheme. This step ensures that all devices start working at the same time point, thereby simulating various complex scenarios that may be encountered in the actual operating environment, and improving the comprehensiveness and authenticity of the test. In step S106, each simulation test device synchronously outputs multiple analog signals according to the preset simulation conditions. These analog signals accurately reflect the operating status of the power grid or related systems and are directly sent to the safety and stability control device connected thereto. In step S108, after receiving these analog signals, the safety and stability control device quickly performs internal processing and generates corresponding test data based on its control logic. These data not only reflect the device's judgment on the current power grid state, but also reflect the execution effect of its control strategy. In step S110, the generated test data is transmitted to the automatic test control center through the simulation test equipment and the tester interface module. The center conducts a comprehensive analysis of the collected test data according to the preset test plan and generates a detailed test report based on it. This report not only includes an intuitive display of the test results, but also an in-depth analysis of the performance of the safety and stability control device, providing valuable data support for subsequent device optimization and improvement.

[0079] The simulation test method for the safety and stability control device of the present invention realizes a comprehensive evaluation of the performance of the safety and stability control device through a highly automated test process, precise analog output and comprehensive data analysis, and provides a solid technical support for ensuring the stable operation of the power system.

[0080] A safety and stability control device simulation test method is applied to an automatic test control center, and the method includes:

[0081] The test scheme design module completes the editing of control strategy tables, low-frequency and low-voltage load reduction, high-frequency overvoltage cutting or disconnection, loss of step disconnection, overload and other functional test schemes;

[0082] The automatic test control center calls the tester interface module while executing the test plan to drive multiple simulation test devices through the switch to achieve multiple analog quantity synchronous output;

[0083] The tester interface module obtains the test data and feeds it back to the automatic test control center for the generation of the test report.

[0084] Among them, the tester interface module is associated with each simulation test device one by one by configuring the IP address. Each simulation test device is distinguished by a different IP address. When the connection is normal, a green "√" is marked and a prompt "This simulation test device has been connected" is prompted. When the connection is interrupted, a red "×" is marked and a prompt "This simulation test device has been disconnected" is prompted. After completing the association of the IP address of the simulation test device, the analog output channel of each simulation test device can be flexibly configured as voltage or current and transformation ratio in the test scheme design module to formulate test schemes for stable control systems of various sizes. The most basic test unit included in the test scheme is a virtual logic tester. Each logic tester has 6 logic channels. These logic channels can be arbitrarily combined into various component combinations required by the user. Each logic tester contains a set of three-phase voltage and three-phase current. Each simulation test device corresponds to 8 logic testers. In order to simulate the scenario where multiple components have the same fault at the same time, several (up to 8) simulation test devices can be associated with the same logic tester. When the automatic test control center executes this test scheme, several simulation test devices will have exactly the same analog output.

[0085] In the test plan design module, the name of the logic tester can be changed to the name of the corresponding component through the parameter configuration menu, which is convenient for distinguishing the test devices when conducting multi-component tests, making the test plan of the large-scale stability control system clear at a glance. After the name of the logic tester is changed, you can choose to save it as a project file in the parameter configuration menu, so that you do not need to modify the name of the tester when you reopen it next time. The parameter configuration menu provides convenience for modifying current and voltage signals during testing. Just put the mouse in the corresponding parameter box to manually modify the variable, and press the Enter key to take effect immediately. At the same time, by right-clicking the mouse in these parameter boxes, you can easily select commonly used functions, such as equal voltage and current amplitude, default current and voltage phase, etc.

[0086] The parameter configuration menu allows you to associate each test device parameter by creating a new test device configuration, including:

[0087] Associate the IP address of the simulation test device to complete the configuration of the specified simulation test device;

[0088] Set channel parameters and determine the analog output channel type;

[0089] Modify the primary and secondary transformation ratios of the analog output channel;

[0090] The analog output channels are associated with the logic tester;

[0091] The associated analog channels are voltage and current parameters.

[0092] In the test plan design module, the electrical quantity menu can be used to set:

[0093] Test phase options include voltage phases Ua, Ub, Uc, Uab, Ubc, Uca, Uabc, and current phases Ia, Ib, Ic, Iab, Ibc, Ica, Iabc;

[0094] The starting value of voltage change, the final value of voltage change, the starting value of current change, the final value of current change, as well as the step length of voltage and current change, and the setting action time;

[0095] Frequency search start value, frequency search end value, frequency search step, slip, setting action time;

[0096] Whether to reset before the test, the reset time before the test, whether to reset before the fault, the reset time before the fault and the time margin for each step;

[0097] 4-way optocoupler isolation output reset status and fault status.

[0098] Through the setting of the above-mentioned electrical quantity menu, the tests of low-frequency load reduction function, low-voltage load reduction function, over-frequency machine cutting function, over-voltage decoupling function, overload strategy verification and other functions can be completed. The tester interface module obtains the test data after each function verification, including the machine cutting and load shedding action value, low-frequency load reduction action value and action time, low-voltage load reduction action value and action time, high-frequency machine cutting action value and action time, over-voltage decoupling action value and action time, overload action value and action time.

[0099] The safety and stability control device simulation test method proposed in the present invention realizes a comprehensive performance evaluation of the safety and stability control device in the power system through a highly automated process. The method first uses the test scheme design module to input and generate a detailed functional test scheme, and then synchronously drives multiple simulation test devices to accurately simulate the operation status of the power grid and output multiple key analog signals. These signals are received and processed by the safety and stability control device to generate test data reflecting its performance. The test data is transmitted back to the automatic test control center through the simulation test equipment and the tester interface module, and the center summarizes and analyzes the data, and finally generates a test report containing an in-depth analysis of the performance. This method significantly improves the test efficiency and accuracy through intelligent test scheme design, flexible parameter configuration, synchronous multi-analog output, and real-time data capture and analysis, providing strong technical support and reliable verification means for the stable operation of the power system.

[0100] Embodiment 3

[0101] According to one embodiment of the present invention, a safety and stability control device simulation test system includes: a safety and stability control device, a simulation test device, a tester interface module, a test scheme design module and an automatic test control center;

[0102] The simulation test equipment is directly output to the analog input test interface of the safety and stability control device through a flat cable. The tester interface module is associated with each simulation test device one by one by configuring the IP address. Each simulation test device is distinguished by a different IP address. The tester interface module can drive 10 simulation test devices through a switch, and the communication between the two uses a Category 5e shielded twisted pair. Both the test plan design module and the tester interface module communicate data with the automatic test control center, which completes the output of the test report by executing the test plan and processing the test data.

[0103] The safety and stability control device simulation test system implemented in the present invention realizes efficient and automated simulation testing of the safety and stability control device by integrating simulation test equipment, tester interface modules and automatic test control center, significantly improves test efficiency and accuracy, ensures extensive verification of control strategies and effective inspection of fault criteria, and thus enhances the safety and stability of the device in practical applications.

[0104] Embodiment 4

[0105] According to an implementation of the present invention, a test method of a safety and stability control device simulation test system according to the third embodiment is applied to an automatic test control center, and the method includes:

[0106] The test scheme design module completes the editing of control strategy tables, low-frequency and low-voltage load reduction, high-frequency overvoltage cutting or disconnection, loss of step disconnection, overload and other functional test schemes;

[0107] The automatic test control center calls the tester interface module while executing the test plan to drive multiple simulation test devices through the switch to achieve multiple analog quantity synchronous output;

[0108] The test data obtained by the tester interface module after each function verification include: machine shedding and load shedding action value, low-frequency load shedding action value and action time, low-voltage load shedding action value and action time, high-frequency machine shedding action value and action time, overvoltage disconnection action value and action time, overload action value and action time. After obtaining the test data, the tester interface module feeds back to the automatic test control center for the generation of test reports.

[0109] The present embodiment will be further described below in conjunction with the accompanying drawings.

[0110] like Figure 1As shown, a safety and stability control device simulation test system includes: a safety and stability control device, a simulation test device, a tester interface module, a test scheme design module and an automatic test control center, wherein the simulation test device directly outputs to the analog input test interface of the safety and stability control device through a flat cable, and the simulation test device can simultaneously output up to 48 ±5V analog quantities, 4 optocoupler isolation outputs, and 2 optocoupler isolation inputs. In the actual test process, the power supply module of the safety and stability control device provides a 24V power supply for external switch quantity, and the common end of the optocoupler isolation output can be connected to the +24V power supply, and the common end of the optocoupler isolation input can be connected to the -24V power supply. The optocoupler isolation input is generally used to capture the output quantity of the safety and stability control device under test, and the optocoupler isolation output is generally used to provide the input quantity to the safety and stability control device under test.

[0111] Generally, the tester interface module can drive 10 simulation test devices through a switch and output multiple analog quantities according to the designed test plan. The test data and test results are fed back to the automatic test control center through the tester interface module for test report generation, completing the automatic closed-loop test function of the entire system.

[0112] Figure 3 FIG. 1 is a flow chart of a simulation test method for a safety and stability control device according to an embodiment of the present invention. Figure 3 As shown, the specific steps of the method are as follows:

[0113] Step 1: The tester interface module is associated with each simulation test device one by one by configuring the IP address. Each simulation test device is distinguished by a different IP address. When the connection is normal, a green "√" will be marked and the prompt "This simulation test device has been connected" will be prompted. When the connection is interrupted, a red "×" will be marked and the prompt "This simulation test device has been disconnected" will be prompted.

[0114] Step 2. After completing the association of the IP address of the simulation test device, you can formulate test plans for various scales of stabilization and control systems in the test plan design module. The most basic test unit included in the designed test plan is a virtual logic tester. Each logic tester has 6 logic channels. These logic channels can be arbitrarily combined into various component combinations required by the user. Each logic tester contains a set of three-phase voltage and three-phase current. Each simulation test device corresponds to 8 logic testers. In order to simulate the scenario where multiple components have the same fault at the same time, several (up to 8) simulation test devices can be associated with the same logic tester. When the automatic test control center executes this test plan, several simulation test devices will have exactly the same analog output.

[0115] Step 3. The test plan formulated in the test plan design module can modify the name of the logic tester to the name of the corresponding component through the parameter configuration menu, which is convenient for distinguishing the test devices when conducting multi-component tests, making the test plan of the large-scale stability control system clear at a glance. After the name of the logic tester is changed, you can choose to save it as a project file in the parameter configuration menu, so that you do not need to modify the name of the tester when you reopen it next time. The parameter configuration menu provides convenience for modifying the current and voltage signals during testing. Just put the mouse in the corresponding parameter box to manually modify the variable, and press the Enter key to take effect immediately. At the same time, click the right button of the mouse in these parameter boxes to easily select commonly used functions, such as equal voltage and current amplitude, default current and voltage phase, etc.

[0116] Step 4: In the parameter configuration menu, you can create a new test device configuration to associate each test device parameter, including:

[0117] Associate the IP address of the simulation test device to complete the configuration of the specified simulation test device;

[0118] Set channel parameters and determine the analog output channel type. Each analog output channel can be flexibly configured as voltage or current, making it easy to develop test plans for stable control systems of various sizes.

[0119] Modify the primary and secondary transformation ratios of the analog output channel;

[0120] The analog output channels are associated with the logic tester;

[0121] The associated analog channels are voltage and current parameters.

[0122] Step 5. The test plan formulated in the test plan design module can be set through the electrical quantity menu to select the test phases, including: voltage phases Ua, Ub, Uc, Uab, Ubc, Uca, Uabc; current phases Ia, Ib, Ic, Iab, Ibc, Ica, Iabc.

[0123] Step 6. When verifying the low-voltage load reduction function and the overvoltage disconnection function, the voltage change start value, voltage change end value, voltage and current change step, and setting action time can be set in the electrical quantity menu; when verifying the overload strategy, the current change start value, current change end value, current change step, and setting action time can be set through the electrical quantity menu; when verifying the low-frequency load reduction function and the over-frequency cutting function, the frequency search start value, frequency search end value, frequency search step, slip and corresponding setting action time can be set through the electrical quantity menu.

[0124] Step 7. Set the reset-related test items and switch quantities in the test plan: whether to reset before the test, the reset time before the test, whether to reset before a fault, the reset time before a fault, and the time margin for each step, the reset status of the coupling isolation output, and the fault status.

[0125] Through the setting of the above electrical quantity menu, the test of low-frequency load reduction function, low-voltage load reduction function, over-frequency machine cutting function, over-voltage decoupling function, overload strategy verification and other functions can be completed. The tester interface module obtains the test data after each function verification, including the machine cutting and load shedding action value, low-frequency load reduction action value and action time, low-voltage load reduction action value and action time, high-frequency machine cutting action value and action time, over-voltage decoupling action value and action time, overload action value and action time. The acquired test data is fed back to the automatic test control center through the tester interface module. The automatic test control center associates the action value, action time, relative error, absolute error, and judges the test results, automatically fills in various types of data and judges the results, and finally generates a test report in the required format.

[0126] This embodiment analyzes the operating principle of the safety and stability control device, summarizes the testing methods of the power grid safety and stability control devices of various domestic manufacturers, makes full use of the existing technical support in the industry, and elaborates on the simulation test method of the safety and stability control device from the aspects of the overall framework of the simulation test system of the safety and stability control device, wiring method and test scheme design. It can be applied to the testing of single stability control devices and the debugging of large-scale regional stability control systems. It can simultaneously simulate various fault scenarios of up to 80 independent full-phase components, effectively verify the complex strategy logic functions of the stability control system, improve the testing efficiency, simplify the testing process, reduce the complexity of the test case design, and play an important role in ensuring product quality.

[0127] The simulation test system for the safety and stability control device of the present invention realizes efficient and automated testing of the safety and stability control device of the power grid by integrating the test scheme design, automatic test control center, tester interface module and multiple simulation test equipment. The system can synchronously output multiple analog quantities, accurately verify key functions such as low-frequency load reduction, high-frequency overvoltage cutting, out-of-step decoupling, overload, etc., and through intelligent test report generation, it improves the test efficiency, simplifies the test process, reduces the complexity of test design, and effectively ensures the quality and performance of the safety and stability control device of the power grid. In addition, the system is suitable for single device testing and large-scale regional stability control system debugging, and can simulate complex fault scenarios of up to 80 independent full-phase components, providing a comprehensive and efficient solution for the testing of power grid safety and stability control devices.

[0128] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

[0129] It should be understood that the size of the serial numbers of each step in the content of the invention and the embodiments of the present invention does not absolutely mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

Claims

1. A safety and stability control device simulation test system, characterized in that: include: The test plan design module is used to generate the test plan according to the configuration and send it to the automatic test control center; The automatic test control center is used to call the tester interface module according to the test plan and drive each simulation test device at the same time; The simulation test device is used to send multiple synchronously output analog quantities to the safety and stability control device connected thereto; The safety and stability control device is used to generate test data according to the simulation quantity; The test data is sent to the automatic test control center through the simulation test equipment and the tester interface module in sequence, and the automatic test control center generates a test report according to the test plan and the summarized test data.

2. The safety and stability control device simulation test system according to claim 1, characterized in that: The test scheme design module receives the editing of the functional test scheme, and the test scheme design module includes a parameter configuration menu and an electrical quantity setting menu.

3. The safety and stability control device simulation test system according to claim 2, characterized in that: The functional test scheme includes: control strategy table, low-frequency and low-voltage load reduction, high-frequency overvoltage cutting or disconnection, loss of step disconnection, and overload.

4. The safety and stability control device simulation test system according to claim 2, characterized in that: The parameter configuration menu is used to configure the voltage and current signals of each simulation test device and associate each test device parameter; The electrical quantity setting menu is used to set the test phase, voltage parameters, frequency parameters, and test parameters; The test scheme design module automatically generates a test scheme according to the parameter configuration menu and the electrical quantity setting menu.

5. The safety and stability control device simulation test system according to claim 1, characterized in that: The tester interface module is connected to a plurality of simulation test devices through a switch.

6. The safety and stability control device simulation test system according to claim 5, characterized in that: The tester interface module is associated with each simulation test device one by one by configuring the IP address, each simulation test device is distinguished by a different IP address, and its connection status is displayed on each simulation test device.

7. The safety and stability control device simulation test system according to claim 1, characterized in that: Each test plan includes multiple virtual logic testers, each logic tester has multiple logic channels, and multiple logic channels can be arbitrarily combined into various component combinations required by the user. Each logic tester contains a set of three-phase voltage and three-phase current.

8. The safety and stability control device simulation test system according to claim 1, characterized in that: The output end of the simulation test equipment is connected to the analog input test interface of the safety and stability control device.

9. The safety and stability control device simulation test system according to claim 8, characterized in that: The simulation test equipment can simultaneously output a maximum of 48 channels of ±5V analog quantities, 4 channels of optocoupler isolation outputs, and 2 channels of optocoupler isolation inputs.

10. A safety and stability control device simulation test method, applied to the safety and stability control device simulation test system according to any one of claims 1 to 9, characterized in that: The method comprises: Input the functional test plan and generate the test plan through the test plan design module; Simultaneously drive each simulation test device according to the test scheme; The simulation test device sends multiple synchronously output analog quantities to the safety and stability control device connected thereto; The safety and stability control device generates test data according to the simulation quantity; The test data is sent to the automatic test control center through the simulation test equipment and the tester interface module in sequence, and the automatic test control center generates a test report according to the test plan and the summarized test data.

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