Power distribution Internet of Things laboratory suitable for testing low-voltage intelligent equipment

Abstract

The invention belongs to the technical field of power system automation and Internet of Things, and relates to a power distribution Internet of Things laboratory suitable for testing low-voltage intelligent equipment. The system comprises a micro-grid simulation system, a load simulation system, a test area and an operation table. One side of the micro-grid simulation system is connected with the load simulation system through a DC bus. The micro-grid simulation system is connected to the load simulation system through an alternating current bus, and a plurality of low-voltage intelligent devices in the test area are connected in series to the alternating current bus; the micro-grid simulation system is also connected with the operation table through a communication wire harness; the operation platform is connected with the plurality of low-voltage intelligent devices and the load simulation system through communication wire harnesses. Through a strict test process, stable operation of the equipment on site is ensured, the reliability of the equipment is improved, the service life of the equipment is prolonged, and precious test data and experience are provided for subsequent standard normalization and protocol normalization of low-voltage transformer area intelligent equipment in the whole province.

Description

Technical Field

[0001] The present invention belongs to the technical field of power system automation and Internet of Things, in particular to the testing process, technical standards and performance testing of low-voltage smart devices, and specifically relates to a power distribution Internet of Things laboratory suitable for testing low-voltage smart devices. Background Art

[0002] At present, the testing process and technical standards of low-voltage smart devices are still imperfect, which may lead to compatibility, stability and performance problems in the actual application of the devices. Existing testing methods mostly rely on manual operation and lack a systematic and automated testing platform. Existing testing methods cannot fully cover all functions and performance indicators of smart devices, and the testing efficiency is low. In addition, the accuracy of the test results is difficult to guarantee, and it cannot meet the application needs of large-scale intelligent devices. For example, due to the lack of unified technical standards, low-voltage smart devices from different manufacturers may have differences in interfaces, protocols, etc., leading to compatibility problems between devices. Existing testing methods can often only test specific devices and cannot be applied to all devices. In addition, existing testing methods mostly rely on manual operation. Testers need to manually set up the test environment, execute test cases, record test results, etc., which is not only time-consuming and labor-intensive, but also prone to human errors. And the existing testing methods may not fully cover all possible usage scenarios and boundary conditions, resulting in some potential problems that cannot be discovered. For example, the performance of the device in extreme environments and the stability of long-term operation.

[0003] Therefore, in order to overcome the above-mentioned technical problems, whether it is possible to provide a distribution Internet of Things laboratory that improves the testing process of low-voltage smart devices, standardizes technology, performance and communication standards, establishes unified technical standards, and increases the testing coverage is a technical problem that needs to be urgently solved in the present invention. Summary of the invention

[0004] In view of this, the present invention proposes a power distribution Internet of Things laboratory suitable for testing low-voltage smart devices.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: A power distribution IoT laboratory suitable for testing low-voltage smart devices, including a microgrid simulation system, a load simulation system, a test area, and an operating table: One side of the microgrid simulation system is connected to the load simulation system through a DC bus to simulate actual load conditions; the microgrid simulation system is also connected to the load simulation system through an AC bus, and multiple low-voltage smart devices in the test area are connected in series to the AC bus to simulate actual grid conditions, ensuring that the low-voltage smart devices are tested in a close-to-real grid environment; the microgrid simulation system is also connected to the operating console through a communication harness to ensure that the operator can monitor and control the operating status of the microgrid simulation system in real time; The operating console is also connected to multiple low-voltage intelligent devices and the load simulation system through communication harnesses, and is used to receive real-time data from the low-voltage intelligent devices and the load simulation system, configure test parameters, and send control instructions to the low-voltage intelligent devices and the load simulation system.

[0006] Furthermore, the microgrid simulation system includes a power grid simulator, a programmable DC power supply, a relay protection tester and a high-precision meter; the relay protection tester and the high-precision meter are connected in series on the AC bus, and the high-precision meter and the relay protection tester are also connected to the operating table through communication harnesses respectively.

[0007] Furthermore, the plurality of low-voltage intelligent devices include serial port devices and CAN bus devices; the serial port devices include intelligent capacitors and multi-function instruments; the CAN bus devices include intelligent circuit breakers, station room equipment and edge agent terminals; and the plurality of low-voltage intelligent devices are also respectively connected to the operating console via communication harnesses.

[0008] Furthermore, the load simulation system includes a photovoltaic inverter and an electronic load, the electronic load and the photovoltaic inverter are connected in series to the AC bus; the programmable DC power supply is connected to the photovoltaic inverter through the DC bus; and the electronic load is connected to the operating table through a communication harness.

[0009] Furthermore, a protocol converter is also arranged in series on the AC bus, and the protocol converter is simultaneously connected to the photovoltaic inverter.

[0010] Furthermore, the operating console includes two PCs, a switch, a serial port server, a CAN bus server and a PLC module; the two PCs, the serial port server, the CAN bus server and the PLC module are all connected to the switch; the serial port device in the low-voltage intelligent device is connected to the serial port server through a communication harness, and the CAN bus device in the low-voltage intelligent device is connected to the CAN bus server through a communication harness.

[0011] Furthermore, the serial port server converts the data of the serial port device into network data for connecting the serial port device and transmitting the data to the PC through the switch; The CAN bus server converts the data of the CAN bus device into network data for connecting the CAN bus device and transmitting the data to the PC through the switch; The switch is used to connect the operating console with the relay protection tester, the plurality of low-voltage intelligent devices and the electronic load to realize data exchange and transmission; The two PCs are used as terminal devices for data processing and control, and are used to configure test plans, select test items, and monitor the test process, and are responsible for test data analysis, test control, and test report generation; The PLC module is connected to the switch, and is used to control the output parameters of the microgrid simulation system and the load simulation system through a preset program to ensure that they work according to a predetermined test plan.

[0012] The beneficial effects of the present invention are: This application uses a rigorous testing process to ensure the stable operation of the equipment on site, improve the reliability and service life of the equipment, and provide valuable test data and experience for the subsequent standardization and protocol normalization of intelligent equipment in low-voltage substations across the province.

[0013] In addition, this application highly restores the real low-voltage area operating environment. The power distribution Internet of Things laboratory simulates the physical characteristics of the actual area in a semi-realistic way, and can generate multiple areas, multiple branches, multiple levels of complex topology grid structures and multiple operating conditions with one click. This highly restored real low-voltage area operating environment makes the test results closer to actual application conditions.

[0014] The laboratory can flexibly construct typical distribution network scenarios and support the access of various new intelligent devices and sensing devices. This flexibility enables the laboratory to adapt to different types of testing needs, thereby improving testing efficiency and accuracy.

[0015] The power distribution IoT laboratory can not only simulate the real low-voltage distribution area environment, but also has the flexibility and customizability of the laboratory testing platform. This means that different test plans can be customized according to specific test requirements, thereby improving the pertinence and effectiveness of the test.

[0016] By testing in the power distribution IoT laboratory, we can find out the deficiencies in the design and performance of low-voltage smart devices, thereby promoting the improvement and optimization of the equipment. This continuous improvement will help to improve the overall level of low-voltage smart devices and promote the healthy development of the low-voltage smart device market. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is an overall schematic diagram of the present invention.

[0019] The attached figure shows: 1: programmable DC power supply, 2: power grid simulator, 3: high-precision meter, 4: relay protection tester, 5: operation table, 6: low-voltage intelligent device, 7: protocol converter, 8: photovoltaic inverter, 9: electronic load. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0022] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​described in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation.

[0023] Therefore, other examples of the exemplary embodiments may have different values.It should be noted that similar reference numerals and letters denote similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0024] Example like Figure 1 As shown, a power distribution Internet of Things laboratory suitable for testing low-voltage smart devices includes a microgrid simulation system, a load simulation system, a test area and an operating table 5.

[0025] One side of the microgrid simulation system is connected to the load simulation system through a DC bus to simulate actual load conditions. The microgrid simulation system is also connected to the load simulation system through an AC bus, and multiple low-voltage smart devices 6 in the test area are connected in series to the AC bus to simulate actual grid conditions, ensuring that the low-voltage smart devices 6 are tested in a near-real grid environment. The microgrid simulation system is also connected to the operating console 5 through a communication harness to ensure that the operator can monitor and control the operating status of the microgrid simulation system in real time.

[0026] The operating console 5 is also connected to multiple low-voltage intelligent devices 6 and the load simulation system through communication harnesses, and is used to receive real-time data from the low-voltage intelligent devices 6 and the load simulation system, configure test parameters, and send control instructions to the low-voltage intelligent devices 6 and the load simulation system.

[0027] As a further improvement of the present invention, the microgrid simulation system includes a power grid simulator 2, a programmable DC power supply 1, a relay protection tester 4 and a high-precision meter 3. The relay protection tester 4 and the high-precision meter 3 are connected in series to the AC bus, and the high-precision meter 3 and the relay protection tester 4 are also connected to the operating console 5 through a communication harness. The power grid simulator 2 is configured with AC output voltage, current and frequency to simulate various normal or abnormal power supply conditions, such as missing items, harmonics, interruptions, temporary drops, jumps, etc. The programmable DC power supply 1 is configured with output voltage and current to simulate the output of power grid energy storage equipment or solar photovoltaic panels. The relay protection tester 4 is configured with a voltage source and a current source to simulate power grid signals and perform equipment performance tests. The high-precision meter 3 is used to measure the output steady-state voltage and current of the power grid simulator 2 to form a closed-loop test.

[0028] The test area includes a test workbench with multiple general workstations, each of which provides multiple communication interfaces and signal input and output interfaces. A low-voltage intelligent device 6 is provided at each workstation. As a further improvement of the present invention, the multiple low-voltage intelligent devices 6 include serial port devices and CAN bus devices. The serial port devices include intelligent capacitors and multi-function instruments. The CAN bus devices include intelligent circuit breakers, station room equipment and edge proxy terminals. The multiple low-voltage intelligent devices 6 are also connected to the operating table 5 through communication harnesses.

[0029] The load simulation system includes an electricity load and a power generation load. The electricity load is realized by a programmable AC / DC electronic load 9, and the power generation load is simulated by a photovoltaic inverter 8. As a further improvement of the present invention, the load simulation system includes a photovoltaic inverter 8 and an electronic load 9, and the electronic load 9 and the photovoltaic inverter 8 are connected in series to the AC bus; the programmable DC power supply 1 is connected to the photovoltaic inverter 8 through a DC bus; and the electronic load 9 is connected to the operating console 5 through a communication harness. The programmable electronic load 9 configures load modes and parameters to simulate different electricity usage scenarios. The photovoltaic inverter 8 configures input and output parameters to simulate photovoltaic equipment in a low-voltage power grid.

[0030] As a further improvement of the present invention, a protocol converter 7 is further provided in series on the AC bus, and the protocol converter 7 is connected to the photovoltaic inverter 8 at the same time.

[0031] As a further improvement of the present invention, the operating console 5 serves as the control center of the present application, which includes two PCs, a switch, a serial port server, a CAN bus server and a PLC module; the two PCs, the serial port server, the CAN bus server and the PLC module are all connected to the switch; the serial port device in the low-voltage intelligent device 6 is connected to the serial port server through a communication harness, and the CAN bus device in the low-voltage intelligent device 6 is connected to the CAN bus server through a communication harness.

[0032] The serial port server converts the data of the serial port device into network data for connecting the serial port device and transmitting the data to the PC through the switch; The CAN bus server converts the data of the CAN bus device into network data for connecting the CAN bus device and transmitting the data to the PC through the switch; The switch is used to connect the operating console 5 with the relay protection tester 4, the plurality of low-voltage intelligent devices 6 and the electronic load 9 to achieve data exchange and transmission; The two PCs are used as terminal devices for data processing and control, and are used to configure test plans, select test items, and monitor the test process, and are responsible for test data analysis, test control, and test report generation; The PLC module is connected to the switch, and is used to control the output parameters of the microgrid simulation system and the load simulation system through a preset program to ensure that they work according to a predetermined test plan.

[0033] In the present application, the functions of the console 5 include: configuring the test plan and selecting the test items through the PC; starting the test, monitoring the test process, receiving and analyzing the test data; generating the test report and printing the test results.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some of the technical features therein with equivalents; it is obvious for those skilled in the art to combine multiple technical solutions of the present invention. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power distribution Internet of Things laboratory suitable for testing low-voltage smart devices, characterized in that: Including microgrid simulation system, load simulation system, test area and operation table: One side of the microgrid simulation system is connected to the load simulation system through a DC bus to simulate actual load conditions; the microgrid simulation system is also connected to the load simulation system through an AC bus, and multiple low-voltage smart devices in the test area are connected in series to the AC bus to simulate actual grid conditions, ensuring that the low-voltage smart devices are tested in a close-to-real grid environment; the microgrid simulation system is also connected to the operating console through a communication harness to ensure that the operator can monitor and control the operating status of the microgrid simulation system in real time; The operating console is also connected to multiple low-voltage intelligent devices and the load simulation system through communication harnesses, and is used to receive real-time data from the low-voltage intelligent devices and the load simulation system, configure test parameters, and send control instructions to the low-voltage intelligent devices and the load simulation system.

2. A power distribution Internet of Things laboratory suitable for testing low-voltage smart devices according to claim 1, characterized in that: The microgrid simulation system includes a power grid simulator, a programmable DC power supply, a relay protection tester and a high-precision meter; the relay protection tester and the high-precision meter are connected in series on the AC bus, and the high-precision meter and the relay protection tester are also connected to the operating table through communication harnesses.

3. A power distribution Internet of Things laboratory suitable for testing low-voltage smart devices according to claim 2, characterized in that: The multiple low-voltage intelligent devices include serial port devices and CAN bus devices; the serial port devices include intelligent capacitors and multi-function instruments; the CAN bus devices include intelligent circuit breakers, station room equipment and edge agent terminals; the multiple low-voltage intelligent devices are also connected to the operating console through communication harnesses.

4. A power distribution Internet of Things laboratory suitable for testing low-voltage smart devices according to claim 3, characterized in that: The load simulation system includes a photovoltaic inverter and an electronic load, wherein the electronic load and the photovoltaic inverter are connected in series to the AC bus; the programmable DC power supply is connected to the photovoltaic inverter via the DC bus; and the electronic load is connected to the operating table via a communication harness.

5. A power distribution Internet of Things laboratory suitable for testing low-voltage smart devices according to claim 4, characterized in that: A protocol converter is also arranged in series on the AC bus, and the protocol converter is simultaneously connected to the photovoltaic inverter.

6. A power distribution Internet of Things laboratory suitable for testing low-voltage smart devices according to claim 5, characterized in that: The operating console includes two PCs, a switch, a serial port server, a CAN bus server and a PLC module; the two PCs, the serial port server, the CAN bus server and the PLC module are all connected to the switch; the serial port device in the low-voltage intelligent device is connected to the serial port server through a communication harness, and the CAN bus device in the low-voltage intelligent device is connected to the CAN bus server through a communication harness.

7. A power distribution Internet of Things laboratory suitable for testing low-voltage smart devices according to claim 6, characterized in that: The serial port server converts the data of the serial port device into network data for connecting the serial port device and transmitting the data to the PC through the switch; The CAN bus server converts the data of the CAN bus device into network data for connecting the CAN bus device and transmitting the data to the PC through the switch; The switch is used to connect the operating console with the relay protection tester, the plurality of low-voltage intelligent devices and the electronic load to realize data exchange and transmission; The two PCs are used as terminal devices for data processing and control, and are used to configure test plans, select test items, and monitor the test process, and are responsible for test data analysis, test control, and test report generation; The PLC module is connected to the switch, and is used to control the output parameters of the microgrid simulation system and the load simulation system through a preset program to ensure that they work according to a predetermined test plan.

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