CN112285453B - Low-voltage user load identification test system and test method thereof - Google Patents
Low-voltage user load identification test system and test method thereof Download PDFInfo
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- CN112285453B CN112285453B CN202010950969.0A CN202010950969A CN112285453B CN 112285453 B CN112285453 B CN 112285453B CN 202010950969 A CN202010950969 A CN 202010950969A CN 112285453 B CN112285453 B CN 112285453B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/36—Preventing errors by testing or debugging software
- G06F11/3668—Software testing
- G06F11/3672—Test management
- G06F11/3684—Test management for test design, e.g. generating new test cases
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/36—Preventing errors by testing or debugging software
- G06F11/3668—Software testing
- G06F11/3672—Test management
- G06F11/3688—Test management for test execution, e.g. scheduling of test suites
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/70—Load identification
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- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
The invention belongs to the technical field of power equipment, in particular to a low-voltage user load identification test system and a test method thereof.
Description
Technical Field
The invention belongs to the technical field of power equipment, and particularly relates to a low-voltage user load identification test system and a test method thereof.
Background
There are a lot of published documents in research on user load identification algorithms, and some enterprises have developed user load identification devices and systems to mainly identify loads through transient characteristics or steady-state characteristics of the loads or a combination of the transient characteristics and the steady-state characteristics of the loads. The verification of the identification algorithm or the identification system in the disclosure is basically performed after some physical loads are actually operated, but the number of loads in actual application is not enough, the representativeness of the physical load in a laboratory is too narrow, and the comprehensive verification of the effectiveness of the algorithm or the system is difficult.
Disclosure of Invention
The invention aims to make up the defects of the prior art and provides a low-voltage user load identification test system and a test method thereof, which are flexible in configuration, strong in expansibility and capable of effectively acquiring electrical data.
The technical scheme adopted by the invention is as follows:
the utility model provides a low pressure user load discernment test system, includes the low voltage electric wire netting, its characterized in that: the low-voltage power grid is characterized in that a low-voltage circuit breaker is installed in a main path of a three-phase power supply of the low-voltage power grid, a plurality of electronic loads are connected to a secondary outlet end of the three-phase power supply in parallel, an access tool is installed on the low-voltage circuit breaker and each electronic load, each access tool is provided with an interface used for being connected with external testing equipment, and each electronic load is communicated with a testing work station in a data mode and used for configuring the size of the electronic load.
Furthermore, at most 500 load characteristic curves are stored in each electronic load, and the load size is dynamically adjusted in a load curve list mode, wherein the load curve list is issued by a test workstation.
Further, each load characteristic curve is marked by a unique load characteristic curve identification ID, and each load characteristic curve comprises load curve data time length and load curve data.
Furthermore, the access tool accesses the 3-phase current of the corresponding line through a 50/5 CT and directly introduces the voltage signal of the corresponding line.
Furthermore, a load characteristic curve is stored in the test workstation, and test software is built in the test workstation and has the functions of test scheme editing and execution capacity.
Furthermore, the electronic load is communicated with the Ethernet switch, and data intercommunication is realized between the electronic load and the test workstation through the Ethernet switch.
A test method of a low-voltage user load identification test system is applied,
the method comprises the following steps:
step 1: an operator inputs a command to the test workstation through the upper computer;
and 2, step: the test workstation formulates a test scheme according to the command;
and 3, step 3: during testing, the testing software issues a load characteristic curve arrangement list corresponding to the ID to the corresponding electronic load through a message;
and 4, step 4: the electronic load is started according to the starting time required by the message, the load size is changed according to the load curve data corresponding to the load characteristic curve identifier ID1 in sequence, and the cycle is repeated according to times until all the curves in the message are executed.
Moreover, the test case in step 2 is composed of one or more test cases.
Moreover, the test case includes a load characteristic curve layout list of each electronic load, and the format is as follows: electronic load ID, start time, "load characteristic curve identification ID1", frequency, "load characteristic curve identification ID2", frequency, "load characteristic curve identification ID3", frequency …, "load characteristic curve identification IDn-1", frequency, "load characteristic curve identification IDn".
The invention has the advantages and positive effects that:
in the invention, the test system is powered by a three-phase low-voltage power grid, and a series of electronic loads are powered by a low-voltage circuit breaker. On the low-voltage circuit breaker and each electronic load branch, an access tool of the measuring equipment is installed, and the access of the instrument/instrument to be measured is facilitated. The electronic loads are networked with the test workstation via an ethernet switch.
In the invention, the low-voltage circuit breaker is adopted to isolate the test environment from the low-voltage power grid, overcurrent protection is configured, and if the test environment has faults such as short circuit and the like, the low-voltage circuit breaker automatically trips to isolate the influence of the test environment on the power grid.
In the invention, the electronic load and the number of corresponding branches can be flexibly configured according to requirements, wherein the electronic load can be internally stored and can dynamically adjust the load size in a load curve list mode, and the load curve list can be issued by a test workstation before the test is in a message mode. The electronic load is started according to the starting time required by the message, the load size is changed according to the load curve data corresponding to the load characteristic curve identifier ID1 in sequence, and the cycle is repeated according to times until all the curves in the message are executed.
In the 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, thereby realizing the access of the full current and the voltage signal of the corresponding line. The instrument/meter to be tested is connected with the measurement and control equipment connecting tool, so that the electric data of the corresponding line can be collected, the instantaneous characteristic or the steady-state characteristic of the electric data of the corresponding line can be further obtained, and a data base is provided for load identification.
In the invention, a large number of load characteristic curves are stored in the test workstation, test software is operated, and the test workstation has the functions of editing and executing a test scheme. And establishing a test scheme consisting of one or more test cases according to test requirements, and issuing a load characteristic curve arrangement list corresponding to the ID to the corresponding electronic load through test software in a message mode during testing.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a schematic diagram of a measuring device access tool in the invention;
FIG. 3 is a flow chart of an application of the test system and test method.
Detailed Description
The present invention is further illustrated by the following examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
The invention discloses a low-voltage user load identification test system, which comprises a low-voltage power grid, and is characterized in that a low-voltage circuit breaker 3 is installed in a main path of a three-phase power supply of the low-voltage power grid, a plurality of electronic loads 1 are connected in parallel at a secondary outlet end of the three-phase power supply, an access tool 2 is installed on the low-voltage circuit breaker and each electronic load, each access tool is provided with an interface for connecting with external test equipment, and each electronic load is communicated with a test workstation 4 for configuring the size of the electronic load.
In this embodiment, at most 500 load characteristic curves are stored in each electronic load, and the load size is dynamically adjusted in a load curve list manner, where the load curve list is issued by a test workstation.
In this embodiment, each load characteristic curve is identified by a unique load characteristic curve identifier ID, and each load characteristic curve includes "load curve data time length" and "load curve data".
In this embodiment, the access tool accesses the 3-phase current of the corresponding line through a 50/5 CT, and directly introduces the voltage signal of the corresponding line.
In this embodiment, a load characteristic curve is stored in the test workstation, and a running test software is built in the test workstation, and the test software has a function of testing the editing and execution capabilities of the scheme.
In this embodiment, the electronic load is connected to the ethernet switch 5, and the ethernet switch and the test workstation implement data communication.
The working process of the invention is as follows:
when the invention is used, namely a test method of a low-voltage user load identification test system is applied, comprising a preparation step and a test step.
The preparation steps are as follows:
step 1: selecting an appropriate number of branches and electronic loads according to a load identification algorithm to be tested or verified;
and 2, step: constructing corresponding branches and electronic loads according to the structure of the test system;
and step 3: respectively connecting an instrument to be tested with an electronic load and a low-voltage circuit breaker;
in this step, when the instrument to be tested is connected, the short contact piece must be pulled out under the condition of power failure, the current access terminal is connected to the current input end of the instrument, and the voltage access section terminal is connected to the voltage input end of the instrument.
And 4, step 4: and after the preparation step is finished, carrying out operation test to check whether faults such as short circuit exist, and carrying out subsequent test steps if corresponding faults do not exist.
The test procedure is as follows:
step 1: and an operator inputs a command to the test workstation through the upper computer.
Step 2: the test workstation formulates a test scheme according to the command;
the test case in the step 2 consists of one or more test cases.
And step 3: during testing, the testing software issues the load characteristic curve arrangement list corresponding to the ID to the corresponding electronic load through a message.
And 4, step 4: the electronic load is started according to the starting time required by the message, the load size is changed according to the load curve data corresponding to the load characteristic curve identifier ID1 in sequence, and the cycle is repeated according to times until all the curves in the message are executed.
The test case comprises a load characteristic curve layout list of each electronic load, and the format is as follows: electronic load ID, start time, "load characteristic curve identification ID1", frequency, "load characteristic curve identification ID2", frequency, "load characteristic curve identification ID3", frequency …, "load characteristic curve identification IDn-1", frequency, "load characteristic curve identification IDn".
In the invention, the test system is powered by a three-phase low-voltage power grid, and a series of electronic loads are powered by a low-voltage circuit breaker. On the low-voltage circuit breaker and each electronic load branch, an access tool of the measuring equipment is installed, and the access of the instrument/instrument to be measured is facilitated. The electronic loads are networked with the test workstation via an ethernet switch.
In the invention, the low-voltage circuit breaker is adopted to isolate the test environment from the low-voltage power grid, overcurrent protection is configured, and if the test environment has faults such as short circuit and the like, the low-voltage circuit breaker automatically trips to isolate the influence of the test environment on the power grid.
In the invention, the electronic load and the number of corresponding branches can be flexibly configured according to requirements, wherein the electronic load can be internally stored and can dynamically adjust the load size in a load curve list mode, and the load curve list can be issued by a test workstation before the test is in a message mode. The electronic load is started according to the starting time required by the message, the load size is changed according to the load curve data corresponding to the load characteristic curve identifier ID1 in sequence, and the cycle is repeated for a plurality of times until all the curves in the message are executed.
In the 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, thereby realizing the access of the full current and the voltage signal of the corresponding line. The equipment/instrument to be tested is connected with the measurement and control equipment access tool, so that the electrical data of the corresponding line can be collected, the instantaneous characteristic or the steady-state characteristic of the electrical data of the corresponding line can be further obtained, and a data basis is provided for load identification.
In the invention, a large number of load characteristic curves are stored in the test workstation, test software is operated, and the test workstation has the functions of editing and executing a test scheme. According to the test requirement, a test scheme composed of one or more test cases is established, and during testing, a load characteristic curve arrangement list corresponding to the ID is issued to the corresponding electronic load through test software in a message mode.
Claims (8)
1. A test method of a low-voltage user load identification test system comprises a low-voltage power grid, and is characterized in that: the method comprises the following steps that a low-voltage circuit breaker is installed in a main path of a three-phase power supply of a low-voltage power grid, a plurality of electronic loads are connected to a secondary outlet end of the three-phase power supply in parallel, an access tool is installed on the low-voltage circuit breaker and each electronic load, each access tool is provided with an interface for being connected with external testing equipment, and each electronic load is communicated with a testing work station in a data mode and used for configuring the size of the electronic load;
the test method comprises the following steps:
step 1: an operator inputs a command to the test workstation through the upper computer;
step 2: the test workstation formulates a test scheme according to the command;
and step 3: during testing, the testing software issues a load characteristic curve arrangement list corresponding to the ID to the corresponding electronic load through a message;
and 4, step 4: the electronic load is started according to the starting time required by the message, the load size is changed according to the load curve data corresponding to the load characteristic curve identifier ID1 in sequence, and the cycle is repeated according to times until all the curves in the message are executed.
2. The method of claim 1, wherein the method comprises the following steps: at most 500 load characteristic curves are stored in each electronic load, the load size is dynamically adjusted in a load curve list mode, and the load curve list is issued by a test workstation.
3. The method for testing a low voltage user load recognition test system according to claim 2, wherein: each load characteristic curve is identified by a unique load characteristic curve identification ID, and each load characteristic curve includes "load curve data time length" and "load curve data".
4. The method of claim 1, wherein the method comprises the following steps: the access tool is accessed to the 3-phase current of the corresponding line through the 50/5 CT and directly introduces the voltage signal of the corresponding line.
5. The method for testing a low voltage user load recognition test system according to claim 1, wherein: the test workstation stores a load characteristic curve and is internally provided with running test software which has the functions of test scheme editing and execution capacity.
6. The method for testing a low voltage user load recognition test system according to claim 1 or 5, wherein: the electronic load is communicated with the Ethernet switch and is communicated with the test workstation through the Ethernet switch.
7. The method of claim 1, wherein the method comprises the following steps: the test case in the step 2 consists of one or more test cases.
8. The method of claim 7, wherein the testing method comprises the following steps: the test case comprises a load characteristic curve layout list of each electronic load, and the format is as follows: electronic load ID, start time, "load characteristic curve identification ID1", frequency, "load characteristic curve identification ID2", frequency, "load characteristic curve identification ID3", frequency …, "load characteristic curve identification IDn-1", frequency, "load characteristic curve identification IDn".
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| CN202010950969.0A CN112285453B (en) | 2020-09-11 | 2020-09-11 | Low-voltage user load identification test system and test method thereof |
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| CN202010950969.0A CN112285453B (en) | 2020-09-11 | 2020-09-11 | Low-voltage user load identification test system and test method thereof |
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| CN112285453B true CN112285453B (en) | 2022-12-09 |
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| US9442999B2 (en) * | 2013-06-07 | 2016-09-13 | Eaton Corporation | Method and system employing graphical electric load categorization to identify one of a plurality of different electric load types |
| CN203629484U (en) * | 2013-10-24 | 2014-06-04 | 江阴齿轮箱制造有限公司 | Adjustable axial load loading detection apparatus |
| KR102399201B1 (en) * | 2016-10-28 | 2022-05-17 | 인테레솔, 엘엘씨 | Controls and Methods of AC Power Sources to Identify Loads |
| CN108008253A (en) * | 2017-12-11 | 2018-05-08 | 艾乐德电子（南京）有限公司 | Simulating grid and online load testing system and device and its anti-isolated island test method |
| CN207946506U (en) * | 2018-01-15 | 2018-10-09 | 中山市博测达电子科技有限公司 | A kind of module for testing electronic load |
| CN108594041B (en) * | 2018-04-23 | 2020-06-16 | 中国计量大学 | Detection platform for non-invasive household power load monitoring device |
| CN111487554A (en) * | 2020-03-17 | 2020-08-04 | 北京交通大学 | Automatic testing system and method for direct current-to-direct current power supply module |
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