Interchangeability power consumption on-load test system of distributed power supply access unit

Abstract

The invention discloses an interchangeability power consumption on-load test system for a distributed power supply access unit, which comprises a tested object, a main control system and a detection unit, and is characterized in that a tested distributed power supply access unit body is connected with a standard virtual communication module and a power supply on-load test tool; the power supply module is used for providing a detected power supply signal, a control interface signal and a communication data interaction message; the power supply on-load test tool is connected with the load switching unit and the ripple detection unit to provide a detected power supply signal; the tested communication module is connected with the standard virtual distributed power supply access unit body and the power consumption test unit to provide a tested power supply signal, a control interface signal and a communication data interaction message; and the main control system is connected with the detection unit and is responsible for initiation of the detection process of the tested distributed power supply access unit body and the tested communication module, flow control, data interaction and output of a test result.

Description

Technical Field

[0001] The present invention relates to the technical field of interchangeable power consumption load testing of power collection terminals, and more specifically, to an interchangeable power consumption load testing system of a distributed power supply access unit. Background Art

[0002] The distributed power access unit is a device that monitors low-voltage distributed photovoltaic inverters and circuit breakers. It has functions such as communication protocol conversion, data collection, power quality monitoring, and remote / local control. It can collect, manage, forward or execute control commands for electric energy meter data. The distributed power access unit adopts a modular hardware design scheme. The terminal body and communication module are designed and developed as independent individuals, and need to be tested for network access separately. Due to the large number of manufacturers, there are great differences in the accuracy, completeness and communication protocol execution of the grid company standards, resulting in the inability to accurately adapt the distributed power access unit body and the communication module. It is difficult to adapt to the interchange requirements of the power access unit body and the communication module between different manufacturers, which brings great difficulties to the on-site operation and maintenance work. In order to build a more efficient power collection terminal management system, higher requirements are put forward for the compatibility and consistency between the distributed power access unit body and the communication module. It is urgent to realize the interchangeability and load capacity detection of the distributed power access unit body, and the interchangeability and module power consumption detection of the communication module. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides an interchangeable power consumption load testing system for a distributed power supply access unit.

[0004] According to one aspect of the present invention, there is provided an interchangeable power consumption load test system for a distributed power access unit, comprising: a tested object, a main control system and a detection unit, wherein the tested object comprises a tested distributed power access unit body and a tested communication module, and the detection unit comprises a standard virtual communication module, a power load test fixture, a load switching unit, a ripple detection unit, a standard virtual distributed power access unit body and a power consumption test unit, wherein

[0005] The distributed power supply access unit under test is connected to the standard virtual communication module and the power supply load test fixture to provide the tested power supply signal, control interface signal and communication data interaction message;

[0006] The power supply load test fixture is connected to the load switching unit and the ripple detection unit to provide the power supply signal to be tested;

[0007] The communication module under test is connected to the standard virtual distributed power access unit body and the power consumption test unit to provide the tested power supply signal, control interface signal and communication data interaction message;

[0008] The main control system is connected to the detection unit and is responsible for initiating the detection process of the distributed power access unit under test and the communication module under test, process control, data interaction and output of test results.

[0009] Optionally, the standard virtual communication module is used to detect whether the hardware interface level of the distributed power access unit under test meets the specification requirements, and at the same time provide a physical data transmission channel for data communication between the distributed power access unit under test and the main control system, and the detection results are finally output to the main control system.

[0010] Optionally, the power supply load test fixture is used to extract the power supply signal of the distributed power supply access unit under test and provide the tested power supply signal to the load switching unit and the ripple detection unit.

[0011] Optionally, the load switching unit is used to test the 12V output power load capacity of the distributed power access unit under test. The load switching unit is used to provide 125mA constant load detection capability and instantaneous load detection capability with a maximum peak current of 250mA and a duration of no more than 20ms. The detection results of the load switching unit are finally output to the main control system.

[0012] Optionally, the ripple detection unit is used to detect the ripple size of the 12V output power supply of the distributed power access unit under test. The ripple detection unit has a fast Fourier transform algorithm, a 20MHz bandwidth limiting function and a real-time sampling rate of 1GSa / s. The detection result is finally output to the main control system.

[0013] Optionally, the main control system obtains the hardware interface detection and communication protocol detection of the distributed power access unit under test by connecting to the standard virtual communication module; connects to the load switching unit to switch different load types, and detects the load capacity of the power interface of the distributed power access unit under test; connects to the ripple test unit to detect the ripple size of the power supply of the distributed power access unit under test; connects to the standard virtual distributed power access unit body to detect the hardware interface detection and communication protocol detection of the communication module under test; connects to the power consumption test unit to detect the power consumption of the communication module under test.

[0014] Optionally, the standard virtual distributed power supply access unit body provides a stable AC and DC working power supply for the communication module under test, and detects whether the hardware interface level of the communication module under test meets the specification requirements. At the same time, it provides a physical data transmission channel for data communication between the communication module under test and the main control system, and the test results are finally output to the main control system.

[0015] Optionally, the power consumption test unit is used to detect the power consumption of the communication module under test. The power consumption test unit adopts a digital fast Fourier algorithm. The detection content includes the AC power consumption, DC power consumption, static power consumption and dynamic power consumption of the communication module under test, and outputs the test results to the main control system.

[0016] Therefore, the present invention has the following beneficial effects:

[0017] (1) The present invention detects the hardware interface level of the distributed power access unit, the power load capacity, the power ripple size, and the communication data message, thereby realizing a comprehensive and quantitative detection of various performance indicators of the distributed power access unit. This provides a powerful detection basis for the consistency of distributed power access units produced by different manufacturers.

[0018] (2) The present invention realizes comprehensive and quantitative detection of various performance indicators of the tested module by detecting the hardware interface level, power consumption and communication data message of the communication module, providing a strong detection basis for the consistency of communication modules produced by different manufacturers.

[0019] (3) By independently testing the distributed power access unit body and the communication module, a closed-loop feedback test result is formed, which provides a powerful detection method for the compatibility test between the distributed power access unit body and the communication module. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] A more complete understanding of exemplary embodiments of the present invention may be obtained by referring to the following drawings:

[0021] Figure 1 It is a structural schematic diagram of an interchangeable power consumption load testing system of a distributed power supply access unit provided by an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0022] Below, the exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments of the present invention, and it should be understood that the present invention is not limited to the exemplary embodiments described here.

[0023] It should be noted that the relative arrangement of components and steps, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0024] Those skilled in the art can understand that the terms "first" and "second" in the embodiments of the present invention are only used to distinguish different steps, devices or modules, etc., and neither represent any specific technical meaning nor indicate the necessary logical order between them.

[0025] It should also be understood that, in the embodiments of the present invention, “plurality” may refer to two or more than two, and “at least one” may refer to one, two or more than two.

[0026] It should also be understood that any component, data or structure mentioned in the embodiments of the present invention can generally be understood as one or more, unless explicitly limited or otherwise indicated in the context.

[0027] In addition, the term "and / or" in the present invention is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects before and after are in an "or" relationship.

[0028] It should also be understood that the description of the various embodiments of the present invention focuses on the differences between the various embodiments, and the same or similar aspects thereof can be referenced to each other, and for the sake of brevity, they will not be described one by one.

[0029] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0030] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0031] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0032] It should be noted that like reference numerals and letters refer to 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.

[0033] Embodiments of the present invention can be applied to electronic devices such as terminal devices, computer systems, servers, etc., which can operate with many other general or special computing system environments or configurations. Examples of well-known terminal devices, computing systems, environments and / or configurations suitable for use with electronic devices such as terminal devices, computer systems, servers, etc. include, but are not limited to: personal computer systems, server computer systems, thin clients, thick clients, handheld or laptop devices, microprocessor-based systems, set-top boxes, programmable consumer electronics, network personal computers, small computer systems, large computer systems, and distributed cloud computing technology environments including any of the above systems, etc.

[0034] Electronic devices such as terminal devices, computer systems, servers, etc. can be described in the general context of computer system executable instructions (such as program modules) executed by computer systems. Generally, program modules can include routines, programs, object programs, components, logic, data structures, etc., which perform specific tasks or implement specific abstract data types. Computer systems / servers can be implemented in a distributed cloud computing environment, where tasks are performed by remote processing devices linked through a communication network. In a distributed cloud computing environment, program modules can be located on local or remote computing system storage media including storage devices.

[0035] Exemplary Methods

[0036] Figure 1 It is a structural schematic diagram of an interchangeable power consumption load testing system of a distributed power supply access unit provided by an exemplary embodiment of the present invention. Figure 1 As shown, the interchangeable power consumption load test system of the distributed power access unit includes: a tested object, a main control system S6 and a detection unit, wherein the tested object includes a tested distributed power access unit body S1 and a tested communication module S7, and the detection unit includes a standard virtual communication module S2, a power load test fixture S3, a load switching unit S4, a ripple detection unit S5, a standard virtual distributed power access unit body S8 and a power consumption test unit S9, wherein

[0037] The distributed power supply access unit body S1 under test is connected to the standard virtual communication module S2 and the power supply load test fixture S3, and is used to provide the tested power supply signal, control interface signal and communication data interaction message;

[0038] The power supply load test fixture S3 is connected to the load switching unit S4 and the ripple detection unit S5 to provide the power supply signal to be tested;

[0039] The communication module S7 under test is connected to the standard virtual distributed power access unit body S8 and the power consumption test unit S9 to provide the tested power supply signal, control interface signal and communication data interaction message;

[0040] The main control system S6 is connected to the detection unit and is responsible for initiating the detection process of the tested distributed power access unit body S1 and the tested communication module S7, process control, data interaction and output of test results.

[0041] Specifically, the present invention designs a method and device for testing the interchangeability of power consumption on load of a distributed power access unit, realizes a method for detecting the interchangeability of power consumption on load of a distributed power access unit body and a communication module, supports standardized detection of a distributed power access unit body and a communication module, meets the network access detection requirements of the State Grid Corporation, realizes compatibility testing between a distributed power access unit body and a communication module, and meets the interchangeability requirements between them.

[0042] In order to realize the compatibility and consistency detection between the distributed power access unit body and the communication module, it is necessary to carry out corresponding targeted standardized tests. In the communication process of the distributed power access unit, the hardware interface level matching between the distributed power access unit body and the communication module, the terminal body load capacity, the module power loss, the communication protocol analysis and the power ripple, etc., often determine the degree of compatibility matching between the distributed power access unit body and the communication module. In order to be able to detect the associated test items more accurately and quantify the relevant test indicators, it is necessary to construct a detection device that can realize independent testing of the distributed power access unit body and the communication module respectively. It can meet the requirements of standardized and full-performance testing of distributed power access unit bodies and communication modules produced by different manufacturers, improve the efficiency of terminal access detection of State Grid Corporation, and detect unqualified distributed power access unit bodies and communication modules in advance, and reduce the failure rate of on-site commissioning.

[0043] In order to meet the requirements of hardware interface level matching between the distributed power access unit body and the communication module, terminal body load capacity, module power loss, communication protocol analysis, and power ripple, the present invention provides an interchangeable power consumption load test system for a distributed power access unit.

[0044] To achieve the above-mentioned purpose and other related purposes, the technical method provided by the present invention is a distributed power supply access unit interchangeability power consumption load test system, comprising:

[0045] S1. The main body of the distributed power access unit under test

[0046] The distributed power access unit body S1 under test is connected to the standard virtual communication module S2 and the power load test fixture S3 as the unit under test, and is used to provide the tested power supply signal, control interface signal and communication data interaction message. It belongs to the object under test.

[0047] S2. Standard virtual communication module

[0048] The standard virtual communication module S2 is a standard virtual module formulated in accordance with the State Grid standard. It is used to connect the distributed power access unit body S1 under test, detect whether the hardware interface level of the distributed power access unit body S1 under test meets the specification requirements, and provide a physical data transmission channel for data communication between the distributed power access unit body S1 under test and the main control system S6, and the test results are finally output to the S6 main control system.

[0049] The hardware interface level detection uses a high-speed AD sampling module to read in real time and determine whether the level is within the specification requirements. The physical channel of data transmission uses a conductive cable with a shielding function to provide a strong guarantee for the anti-interference of the data.

[0050] S3. Power supply load test tooling

[0051] The design of the power supply load test fixture S3 meets the communication module size and interface defined by the State Grid. It is used to extract the power supply signal of the distributed power supply access unit body S1 under test and provide the tested power supply signal for the subsequent load switching unit S4 and the ripple detection unit S5.

[0052] The test fixture is designed with easy-plug mode, and the power wire is made of high-temperature resistant and thick wire. The connector is composed of high-current, low-impedance terminal blocks. It can greatly reduce the impact of the device itself on the accuracy of power parameter measurement.

[0053] S4. Load switching unit

[0054] The load switching unit S4 is used to test the 12V output power load capacity of the distributed power access unit S1 under test. The power signal is extracted by the power load test fixture S3 and output to the load switching unit S4. The load switching unit S4 can provide 125mA constant load detection capability and instantaneous load detection capability with a maximum peak current of 250mA and a duration of no more than 20ms. The basic current rise rate of the load switching unit S4 can reach 2.5A / us, and the test results are finally output to the S6 main control system.

[0055] The constant load mode can be implemented by using a high-precision, fixed-resistance resistor of more than 2W. The transient load mode can be implemented by an electronic load, which sets different current values ​​according to the specification requirements and outputs them in the form of current pulses to achieve parameter adjustment for transient changes in current values.

[0056] S5. Ripple detection unit

[0057] The ripple detection unit S5 is used to detect the ripple size of the 12V output power supply of the distributed power access unit S1 under test. The power supply signal is extracted by the power supply load test fixture S3 and output to the ripple detection unit S5. The ripple detection unit S5 has the functions of fast Fourier transform algorithm, 20MHz bandwidth limitation function and 1GSa / s real-time sampling rate. The detection results are finally output to the S6 main control system.

[0058] The ripple detection unit can be implemented by a portable programmable oscilloscope to measure and read the amplitude of the measured signal in real time.

[0059] S6. Main control system

[0060] The main control system S6 is the main component of the interchangeable power consumption load test method and device of the distributed power access unit, and is responsible for the initiation of the detection process, process control, data interaction and output of the test results. By connecting the standard virtual communication module S2, the hardware interface detection and communication protocol detection of the distributed power access unit body S1 under test are obtained. Connecting the load switching unit S4 can switch different load types to detect the load capacity of the power interface of the distributed power access unit body S1 under test. Connecting the ripple test unit S5 is used to detect the ripple size of the power supply of the distributed power access unit body S1 under test. Connecting the standard virtual distributed power access unit body S8 is used to detect the hardware interface detection and communication protocol detection of the communication module S7 under test. Connecting the power consumption test unit S9 is used to detect the power consumption of the communication module S7 under test.

[0061] The main control system can be implemented by a computer hardware system and test software; the computer hardware system provides a hardware operating platform and a hardware interface; the test software realizes a method for testing the interchangeability of power consumption and load of a distributed power supply access unit and controls each hardware module inside the device, reads test data, determines the test structure, and gives a test conclusion.

[0062] S7. Communication module under test

[0063] The communication module S7 under test is used as a unit under test, connected to the standard virtual distributed power access unit S8 and the power consumption test unit S9, and is used to provide a power supply signal under test, a control interface signal and a communication data interaction message. It belongs to the object under test.

[0064] S8. Standard virtual distributed power access unit

[0065] The standard virtual distributed power access unit body S8 is a standard virtual distributed power access unit body formulated according to the State Grid standard, which is used to connect the communication module S7 under test and provide a stable AC and DC working power supply for the communication module S7 under test. It detects whether the hardware interface level of the communication module S7 under test meets the specification requirements, and provides a physical data transmission channel for the data communication between the communication module S7 under test and the main control system S6, and the test results are finally output to the main control system S6.

[0066] The hardware interface level detection uses a high-speed AD sampling module for real-time high-speed reading to determine whether its level is within the specification requirements. The physical channel for data transmission uses a conductive cable with a shielding function to provide a strong guarantee for the anti-interference of the data. The DC power supply of the tested communication module S7 can be provided by a linear power supply, and the AC power supply is provided by a purified power supply output. The output of the AC and DC power supply can be controlled by the internal relay of the S1 standard virtual distributed power supply access unit body to cut in and out.

[0067] S9. Power consumption test unit

[0068] The power consumption test unit S9 is used to detect the power consumption of the communication module S7 under test. It uses a digital fast Fourier algorithm to detect the AC power consumption, DC power consumption, static power consumption and dynamic power consumption of the communication module S7 under test. The test results are output to the main control system S6.

[0069] The AC power consumption detection part of the power consumption detection unit S9 can be measured by an AC power meter and output the test results; the DC power consumption detection part can be realized by a high-speed voltage detection circuit and a high-speed current detection circuit. The real-time DC power consumption test data can be calculated by Ohm's law P=U*I, and the test structure can be output to the main control system S6 in real time.

[0070] Therefore, the present invention has the following beneficial effects:

[0071] (1) The present invention detects the hardware interface level of the distributed power access unit, the power load capacity, the power ripple size, and the communication data message, thereby realizing a comprehensive and quantitative detection of various performance indicators of the distributed power access unit. This provides a powerful detection basis for the consistency of distributed power access units produced by different manufacturers.

[0072] (2) The present invention realizes comprehensive and quantitative detection of various performance indicators of the tested module by detecting the hardware interface level, power consumption and communication data message of the communication module, providing a strong detection basis for the consistency of communication modules produced by different manufacturers.

[0073] (3) By independently testing the distributed power access unit body and the communication module, a closed-loop feedback test result is formed, which provides a powerful detection method for the compatibility test between the distributed power access unit body and the communication module.

[0074] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present invention to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A distributed power supply access unit interchangeability power consumption load test system, characterized in that: include: A tested object, a main control system (S6) and a detection unit, wherein the tested object includes a tested distributed power access unit body (S1) and a tested communication module (S7), and the detection unit includes a standard virtual communication module (S2), a power supply load test fixture (S3), a load switching unit (S4), a ripple detection unit (S5), a standard virtual distributed power access unit body (S8) and a power consumption test unit (S9), wherein The distributed power access unit body (S1) under test is connected to a standard virtual communication module (S2) and a power load test fixture (S3) to provide a tested power supply signal, a control interface signal and a communication data interaction message; The power supply load test fixture (S3) is connected to the load switching unit (S4) and the ripple detection unit (S5) to provide the tested power supply signal; The communication module under test (S7) is connected to the standard virtual distributed power access unit body (S8) and the power consumption test unit (S9) to provide a power supply signal under test, a control interface signal and a communication data interaction message; The main control system (S6) is connected to the detection unit and is responsible for initiating the detection process, process control, data interaction and output of the test results of the distributed power access unit body (S1) and the communication module (S7) under test.

2. The system according to claim 1, characterized in that The standard virtual communication module (S2) is used to detect whether the hardware interface level of the distributed power access unit body (S1) under test meets the specification requirements, and at the same time provides a physical data transmission channel for data communication between the distributed power access unit body (S1) under test and the main control system (S6), and the detection result is finally output to the main control system (S6).

3. The system according to claim 1, characterized in that The power supply load test fixture (S3) is used to extract the power supply signal of the distributed power supply access unit body (S1) under test and provide it to the load switching unit (S4) and the ripple detection unit to provide the tested power supply signal (S5).

4. The system according to claim 1, characterized in that The load switching unit (S4) is used to test the 12V output power load capacity of the distributed power access unit body (S1) under test. The load switching unit (S4) is used to provide 125mA constant load detection capability and instantaneous load detection capability with a maximum peak current of 250mA and a duration of no more than 20ms. The detection result of the load switching unit (S4) is finally output to the main control system (S6).

5. The system according to claim 1, characterized in that The ripple detection unit (S5) is used to detect the ripple size of the 12V output power supply of the distributed power access unit body (S1) under test. The ripple detection unit (S5) has a fast Fourier transform algorithm, a 20MHz bandwidth limiting function and a real-time sampling rate of 1GSa / s. The detection result is finally output to the main control system (S6).

6. The system according to claim 1, characterized in that The main control system (S6) obtains the hardware interface detection and communication protocol detection of the distributed power access unit body (S1) under test by connecting to the standard virtual communication module (S2); connects to the load switching unit (S4) to switch different load types and detect the load capacity of the power interface of the distributed power access unit body (S1) under test; connects to the ripple test unit (S5) to detect the ripple size of the power supply of the distributed power access unit body (S1) under test; connects to the standard virtual distributed power access unit body (S8) to detect the hardware interface detection and communication protocol detection of the communication module (S7) under test; connects to the power consumption test unit (S9) to detect the power consumption size of the communication module (S7) under test.

7. The system according to claim 1, characterized in that The standard virtual distributed power access unit body (S8) provides a stable AC and DC working power supply for the communication module under test (S7), and detects whether the hardware interface level of the communication module under test (S7) meets the specification requirements, and at the same time provides a physical data transmission channel for data communication between the communication module under test (S7) and the main control system (S6), and the detection result is finally output to the main control system (S6).

8. The system according to claim 1, characterized in that The power consumption test unit (S9) is used to detect the power consumption of the communication module (S7) under test. The power consumption test unit (S9) adopts a digital fast Fourier algorithm inside. The detection content includes the AC power consumption, DC power consumption, static power consumption and dynamic power consumption of the communication module (S7) under test, and outputs the test results to the main control system (S6).

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