CN112285453B - Low-voltage user load identification test system and test method thereof - Google Patents

Abstract

The invention belongs to the technical field of electric power equipment, in particular to a low-voltage user load identification testing system and a testing method thereof, including a low-voltage power grid, a low-voltage circuit breaker is installed in the main circuit of a three-phase power supply of the low-voltage power grid, and the three-phase power supply Multiple electronic loads are connected in parallel at the secondary outlet of the circuit breaker, and an access tool is installed on the path between the low-voltage circuit breaker and each electronic load, and each access tool is provided with an interface for connecting with external test equipment connection, each of the electronic loads realizes data communication with a test workstation respectively, and is used to configure the size of the electronic load.

Description

A low-voltage user load identification test system and its test method

technical field

The invention belongs to the technical field of electric equipment, in particular to a low-voltage user load identification test system and a test method thereof.

Background technique

A large number of public literatures are researching user load identification algorithms, and some companies have developed user load identification equipment and systems, which mainly realize load identification through the transient characteristics or steady-state characteristics of the load or a combination of the two. The verification of the recognition algorithm or recognition system in the public literature basically uses some physical loads for actual operation and verification, but there are countless loads in practical applications, and the representativeness of the physical load in the laboratory is too small, so it is difficult to verify the algorithm or system. The effectiveness of the comprehensive verification.

Contents of the invention

The purpose of the present invention is to make up for the deficiencies of the prior art, and provide a low-voltage user load identification test system and a test method thereof that are flexible in configuration, strong in expandability, and effectively collect electrical data.

The technical scheme that the present invention takes is:

A low-voltage user load identification test system, including a low-voltage power grid, is characterized in that a low-voltage circuit breaker is installed in the main circuit of the three-phase power supply of the low-voltage power grid, and a plurality of electronic circuits are connected in parallel at the secondary outlet of the three-phase power supply. load, an access tool is installed on the road between the low-voltage circuit breaker and each electronic load, each of the access tools is provided with an interface for connecting with external test equipment, and each of the electronic loads is connected to the A test workstation implements data intercommunication and is used to configure the size of the electronic load.

Further, each electronic load stores up to 500 load characteristic curves, and dynamically adjusts the size of the load according to the load curve list, and the load curve list is issued by the test workstation.

Further, each load characteristic curve is marked by a unique load characteristic curve ID, and each load characteristic curve includes "load curve data time length" and "load curve data".

Further, the connection tool is connected to the 3-phase current of the corresponding line through the 50/5 CT, and directly introduces the voltage signal of the corresponding line.

Further, the test workstation stores load characteristic curves and built-in running test software, which has the function of editing and executing test schemes.

Further, the electronic load communicates with the Ethernet switch, and realizes data intercommunication with the test workstation through the Ethernet switch.

Applying a test method for a low-voltage user load identification test system,

Including the following steps:

Step 1: The operator inputs commands to the test workstation through the host computer;

Step 2: The test workstation formulates a test plan according to the command;

Step 3: During the test, the test software sends the "load characteristic curve arrangement list" corresponding to the ID to the corresponding electronic load through the message;

Step 4: The electronic load is started according to the start time required by the message, and the load size is changed according to the "load curve data" corresponding to the "load characteristic curve ID1" in turn, and cycled according to the number of times until all the curves in the message are executed.

Moreover, the test solution in step 2 consists of one or more test cases.

Moreover, the test case includes each electronic load "load characteristic curve arrangement list", the format is: electronic load ID, start time, "load characteristic curve identification ID1", times, "load characteristic curve identification ID2", times, "load Characteristic curve identification ID3", number of times..."load characteristic curve identification IDn-1", times, "load characteristic curve identification IDn".

Advantage and positive effect of the present invention are:

In the present invention, the test system is powered by a three-phase low-voltage grid, and supplies power to a series of electronic loads through a low-voltage circuit breaker. On the low-voltage circuit breaker and each electronic load branch, the access tooling of the measuring equipment is installed to facilitate the access of the instrument/meter to be tested. The electronic load is connected to the test workstation through the Ethernet switch.

In the present invention, a low-voltage circuit breaker is used to isolate the test environment from the low-voltage power grid, and overcurrent protection is configured. If a fault such as a short circuit occurs in the test environment, the low-voltage circuit breaker will automatically trip to isolate the influence of the test environment on the power grid.

In the present invention, the number of electronic loads and corresponding branches can be flexibly configured according to needs, wherein the electronic load can store internally and dynamically adjust the load size in the form of a load curve list, and the load curve list can be used by the test workstation before testing in the form of a message Issued. The electronic load is started according to the start time required by the message, and the load size is changed according to the "load curve data" corresponding to the "load characteristic curve ID1" in turn, and the cycle is repeated according to the number of times until all the curves in the message are executed.

In the present invention, the access tool accesses the 3-phase current of the corresponding line through the 50/5 CT, and directly introduces the voltage signal of the corresponding line to realize the access of the full current and voltage signal of the corresponding line. The instrument/instrument to be tested is connected to the measurement and control equipment and connected to the tooling, which can realize the collection of electrical data of the corresponding line, and then obtain the instantaneous characteristics or steady-state characteristics of the electrical data of the corresponding line, providing a data basis for load identification.

In the present invention, a large number of load characteristic curves are stored on the testing workstation, and testing software is run, and has the functions of editing and executing test schemes. According to the test needs, a test plan consisting of one or more test cases is established, and during the test, the "load characteristic curve arrangement list" corresponding to the ID is sent to the corresponding electronic load through the test software in a message.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the schematic diagram of measuring equipment access frock in the present invention;

Fig. 3 is a flow chart of applying the testing system and testing method.

detailed description

Below in conjunction with the examples, the present invention is further described, the following examples are illustrative, not limiting, and the protection scope of the present invention cannot be limited by the following examples.

A low-voltage user load identification test system includes a low-voltage power grid. The innovation of the present invention is that a low-voltage circuit breaker 3 is installed in the main circuit of the three-phase power supply of the low-voltage power grid, and the secondary outlet of the three-phase power supply is connected in parallel. A plurality of electronic loads 1, an access tool 2 is installed on the road between the low-voltage circuit breaker and each electronic load, and each of the access tools is provided with an interface for connecting to an external test device. The electronic loads communicate with a test workstation 4 for data communication, and are used to configure the size of the electronic loads.

In this embodiment, each electronic load stores up to 500 load characteristic curves, and dynamically adjusts the size of the load according to the load curve list, and the load curve list is issued by the test workstation.

In this embodiment, each load characteristic curve is marked by a unique load characteristic curve ID, and each load characteristic curve includes "load curve data time length" and "load curve data".

In this embodiment, the access tool is connected to the 3-phase current of the corresponding line through the 50/5 CT, and directly introduces the voltage signal of the corresponding line.

In this embodiment, the test workstation stores load characteristic curves and built-in running test software, and the test software has the function of editing and executing test schemes.

In this embodiment, the electronic load communicates with the Ethernet switch 5, and realizes data communication with the test workstation via the Ethernet switch.

Working process of the present invention is:

When the present invention is used, a test method of a low-voltage user load identification test system is applied, including preparation steps and test steps.

The preparatory steps described are as follows:

Step 1: Select the appropriate number of branches and electronic loads according to the load identification algorithm that needs to be tested or verified;

Step 2: Construct the corresponding branch circuit and electronic load according to the structure of the test system;

Step 3: Connect the instrument to be tested with the electronic load and the low-voltage circuit breaker respectively;

In this step, when the instrument to be tested is connected, the shorting piece must be pulled out in the event of a power failure, the current access terminal is connected to the current input terminal of the instrument, and the voltage access section terminal is connected to the voltage input terminal of the instrument.

Step 4: After the above preparatory steps are completed, conduct a running test to check whether there are faults such as short circuits. If there is no corresponding fault, you can proceed to the subsequent test steps.

The test steps are as follows:

Step 1: The operator inputs commands to the test workstation through the host computer.

Step 2: The test workstation formulates a test plan according to the command;

The test scheme in step 2 consists of one or more test cases.

Step 3: During the test, the test software sends the "load characteristic curve arrangement list" corresponding to the ID to the corresponding electronic load through the message.

Step 4: The electronic load is started according to the start time required by the message, and the load size is changed according to the "load curve data" corresponding to the "load characteristic curve ID1" in turn, and cycled according to the number of times until all the curves in the message are executed.

The test case includes each electronic load "load characteristic curve arrangement list", the format is: electronic load ID, start time, "load characteristic curve identification ID1", times, "load characteristic curve identification ID2", times, "load characteristic curve Identification ID3", number of times..."load characteristic curve identification IDn-1", times, "load characteristic curve identification IDn".

In the present invention, the test system is powered by a three-phase low-voltage grid, and supplies power to a series of electronic loads through a low-voltage circuit breaker. On the low-voltage circuit breaker and each electronic load branch, the access tooling of the measuring equipment is installed to facilitate the access of the instrument/meter to be tested. The electronic load is connected to the test workstation through the Ethernet switch.

In the present invention, a low-voltage circuit breaker is used to isolate the test environment from the low-voltage power grid, and overcurrent protection is configured. If a fault such as a short circuit occurs in the test environment, the low-voltage circuit breaker will automatically trip to isolate the influence of the test environment on the power grid.

In the present invention, the number of electronic loads and corresponding branches can be flexibly configured according to needs, wherein the electronic load can store internally and dynamically adjust the load size in the form of a load curve list, and the load curve list can be used by the test workstation before testing in the form of a message Issued. The electronic load is started according to the start time required by the message, and the load size is changed according to the "load curve data" corresponding to the "load characteristic curve ID1" in turn, and the cycle is repeated according to the number of times until all the curves in the message are executed.

In the present invention, the access tool accesses the 3-phase current of the corresponding line through the 50/5 CT, and directly introduces the voltage signal of the corresponding line to realize the access of the full current and voltage signal of the corresponding line. The instrument/instrument to be tested is connected to the measurement and control equipment and connected to the tooling, which can realize the collection of electrical data of the corresponding line, and then obtain the instantaneous characteristics or steady-state characteristics of the electrical data of the corresponding line, providing a data basis for load identification.

In the present invention, a large number of load characteristic curves are stored on the testing workstation, and testing software is run, and has the functions of editing and executing test schemes. According to the test needs, a test plan consisting of one or more test cases is established, and during the test, the "load characteristic curve arrangement list" corresponding to the ID is sent to the corresponding electronic load through the test software in a message.

Claims (8)

1. A test method of a low-voltage user load identification test system, comprising a low-voltage power grid, characterized in that: a low-voltage circuit breaker is installed in the main circuit of the three-phase power supply of the low-voltage power grid, and the secondary outlet port of the three-phase power supply Multiple electronic loads are connected in parallel, and an access tool is installed on the road between the low-voltage circuit breaker and each electronic load, and each access tool is provided with an interface for connecting with external test equipment. The electronic loads are respectively connected with a test workstation to realize data intercommunication, which is used to configure the size of the electronic loads; Its testing method comprises the following steps: Step 1: The operator inputs commands to the test workstation through the host computer; Step 2: The test workstation formulates a test plan according to the command; Step 3: During the test, the test software sends the "load characteristic curve arrangement list" corresponding to the ID to the corresponding electronic load through the message; Step 4: The electronic load is started according to the start time required by the message, and the load size is changed according to the "load curve data" corresponding to the "load characteristic curve ID1" in turn, and cycled according to the number of times until all the curves in the message are executed. 2. the test method of a kind of low-voltage user load identification test system according to claim 1, it is characterized in that: all store up to 500 load characteristic curves in each described electronic load, and dynamically according to the mode of load curve list Adjust the load size, and the load curve list is issued by the test workstation. 3. the test method of a kind of low-voltage user load identification testing system according to claim 2, it is characterized in that: each load characteristic curve is all marked by unique load characteristic curve identification ID, and each load characteristic curve all includes " load Curve Data Time Length" and "Load Curve Data". 4. The test method of a low-voltage user load identification test system according to claim 1, wherein the access tool is connected to the 3-phase current of the corresponding line through a 50/5 CT, and directly introduced into the corresponding line voltage signal. 5. the test method of a kind of low-voltage user load recognition test system according to claim 1, it is characterized in that: the load characteristic curve is stored in the described test workstation, and built-in operation test software, this test software has test scheme editor and function of executive capacity. 6. The test method of a low-voltage user load identification test system according to claim 1 or 5, characterized in that: the electronic load is connected to the Ethernet switch, and realizes data communication with the test workstation via the Ethernet switch . 7. The test method of a low-voltage user load identification test system according to claim 1, characterized in that: the test plan in the step 2 consists of one or more test cases. 8. The test method of a low-voltage user load identification test system according to claim 7, wherein the test case includes each electronic load "load characteristic curve arrangement list", and the format is: electronic load ID, start time , "load characteristic curve identification ID1", times, "load characteristic curve identification ID2", times, "load characteristic curve identification ID3", times... "load characteristic curve identification IDn-1", times, "load characteristic curve identification IDn" .

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