CN211786064U - Multi-mode intelligent substation simulation system - Google Patents

Abstract

The utility model discloses a multi-mode intelligent substation simulation system, comprising: a traditional electric energy metering module, which uses a standard electronic electric energy meter to measure the electric energy of the current value and the voltage value output by the traditional current transformer and the traditional voltage transformer, and obtains electric energy Measurement standard value; semi-digital electric energy measurement module, using the current value and voltage value output by traditional current transformer and traditional voltage transformer to obtain the first electric energy measurement value; full digital electric energy measurement module, using electronic current transformer and electronic voltage The current value and voltage value output by the transformer are used to obtain the second electric energy measurement value; the energy meter information aggregation processing module uses the electric energy measurement standard value, the first electric energy measurement value and the second electric energy measurement value to calculate the semi-digital electric energy measurement value The measurement error of the module and the all-digital electric energy measurement module; the monitoring module monitors the process of determining the measurement error.

Description

A multi-mode intelligent substation simulation system

technical field

The utility model relates to the field of metering and calibration, and more particularly, to a multi-mode intelligent substation simulation system.

Background technique

At present, there are more than 7,000 smart stations in State Grid Corporation of China and China Southern Power Grid Corporation. The large-scale construction and operation of smart substations has greatly promoted a large number of applications of digital-related equipment. Compared with the traditional electromagnetic quantity equipment, the test equipment, test principle and test technology used by digital metering equipment are basically a new content. Although digital metering has been proposed for some time, different companies in the network province are in the field of digital metering professionals. In terms of accumulation and personnel accumulation, there are still serious differences. The installation, commissioning, operation and maintenance of digital metering equipment have put forward new requirements for relevant technical personnel, especially for the new grid personnel who have initially come into contact with smart substations in the field of digital metering. The knowledge and cognition related to the unit device are basically blank.

The difference between the intelligent substation and the traditional substation is reflected in the electronic transformer used and the secondary circuit part matched with the electronic transformer. Therefore, it is necessary to determine a multi-modal intelligent substation simulation system to conduct multi-modal energy metering research.

SUMMARY OF THE INVENTION

The utility model proposes a multi-mode intelligent substation simulation system to solve the problem of how to analyze the multi-mode electric energy measurement.

In order to solve the above problems, according to one aspect of the present utility model, a multi-mode intelligent substation simulation system is provided, the system includes:

The traditional electric energy metering module is connected with the electric energy meter information aggregation processing module, and is used for electric energy measurement on the current value and voltage value output by the traditional current transformer and the traditional voltage transformer by using the standard electronic electric energy meter to obtain the electric energy metering standard value ;

The semi-digital electric energy metering module is connected with the electric energy meter information aggregation processing module, and is used for combining and synchronizing the current value and voltage value output by the traditional current transformer and the traditional voltage transformer by using the analog merging unit to obtain the first intermediate data, and use a digital electric energy meter to perform electric energy measurement on the first intermediate data to obtain a first electric energy measurement value;

The all-digital electric energy metering module is connected to the electric energy meter information aggregation processing module, and is used for combining and synchronizing the current value and voltage value output by the electronic current transformer and the electronic voltage transformer by using the digital quantity merging unit, so as to obtain the first 2 intermediate data, and use a digital electric energy meter to perform electric energy measurement on the second intermediate data to obtain a second electric energy measurement value;

an electric energy meter information aggregation processing module, which is respectively connected with the traditional electric energy measurement module, the semi-digital electric energy measurement module and the full digital electric energy measurement module, and is used for utilizing the electric energy measurement standard value, the first electric energy measurement value and the second electric energy measurement value, Calculate the metering errors of the semi-digital power metering module and the full-digital power metering module.

Preferably, wherein the system further comprises:

The standard current booster is connected to the traditional current transformer and the electronic current transformer respectively, and is used to output the standard current value and transmit it to the traditional current transformer and the electronic current transformer respectively;

The standard booster is respectively connected with the traditional voltage transformer and the electronic voltage transformer, and is used for outputting the standard voltage value, which is respectively transmitted to the traditional voltage transformer and the electronic voltage transformer.

Preferably, wherein the system further comprises:

The merging unit information aggregation processing module is respectively connected with the analog quantity merging unit and the digital quantity merging unit, and is used to perform electric energy measurement according to the first intermediate data and the second intermediate data, so as to obtain the first electric energy measurement verification value and The second power check value.

Preferably, wherein the system further comprises:

The electronic transformer calibrator is connected to the electronic voltage transformer and the electronic current transformer, and is used to check the error of the electronic voltage transformer and the electronic current transformer;

The merging unit tester is connected with the analog merging unit and the digital merging unit, and is used to check the errors of the analog merging unit and the digital merging unit;

The digital electric energy meter calibrator is connected with the digital electric energy meter, and is used for calibrating the error of the digital electric energy meter.

Preferably, wherein the system further comprises:

Three-phase analog arbitrary wave transmitter, connected with the analog merging unit, used to simulate the secondary output of the traditional transformer, output the preset analog transformer fault waveform, and transmit it to the analog merging unit for fault detection Calculation of energy metering error under conditions;

The three-phase digital arbitrary wave transmitter is connected to the digital merging unit for simulating the secondary output of the electronic transformer, outputs the preset digital transformer fault waveform, and transmits it to the digital merging unit for Calculation of energy metering errors under fault conditions.

Preferably, the electric energy meter information aggregation processing module reads the electric energy metering standard value, the first electric energy metering value and the second electric energy metering value through the 485 protocol.

Preferably, the analog quantity merging unit and the digital quantity merging unit output the acquired intermediate data to the digital electric energy meter according to the IEC61850 protocol.

The utility model provides a multi-mode intelligent substation simulation system, comprising: a traditional electric energy metering module, which uses a standard electronic electric energy meter to measure the electric energy of the current value and the voltage value output by the traditional current transformer and the traditional voltage transformer, and obtains electric energy. Measurement standard value; semi-digital electric energy measurement module, using the current value and voltage value output by traditional current transformer and traditional voltage transformer to obtain the first electric energy measurement value; full digital electric energy measurement module, using electronic current transformer and electronic voltage The current value and voltage value output by the transformer are used to obtain the second electric energy measurement value; the energy meter information aggregation processing module uses the electric energy measurement standard value, the first electric energy measurement value and the second electric energy measurement value to calculate the semi-digital electric energy measurement value Metering errors of modules and fully digital energy metering modules. The multi-mode intelligent substation simulation system of the utility model includes a traditional metering circuit, a semi-digital metering circuit and a full-digital metering circuit, and can intuitively compare the common points of the three metering modes of the traditional metering circuit, the semi-digital metering circuit and the full-digital metering circuit. And the difference point, you can view the difference of electric energy measurement in three states in real time; the wiring of the three metering modes can be changed, which can facilitate the trainees to simulate the on-site environment in the laboratory, and target the related traditional transformers and electronic transformers. It can also use existing platform resources, combined with corresponding calibrators and testers, to simulate the scene online or offline in parallel or in series with the loop. The above-mentioned equipment is calibrated and tested in a real environment; it can solve the practical problems of cognition, installation, debugging, operation and maintenance of the relevant equipment of the smart substation for newcomers who have initially contacted the smart substation.

Description of drawings

Exemplary embodiments of the present invention can be more fully understood by referring to the following drawings:

1 is a schematic structural diagram of a multi-mode smart substation simulation system 100 according to an embodiment of the present invention;

2 is an example diagram of a multi-mode smart substation simulation system according to an embodiment of the present invention; and

FIG. 3 is a schematic diagram of three metering mode group lines according to an embodiment of the present invention.

Detailed ways

Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for the purpose of being thorough and complete. The present invention is disclosed and the scope of the present invention is fully conveyed to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the invention. In the drawings, the same elements/elements are given the same reference numerals.

Unless otherwise defined, terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is to be understood that terms defined in commonly used dictionaries should be construed as having meanings consistent with the context in the related art, and should not be construed as idealized or overly formal meanings.

FIG. 1 is a schematic structural diagram of a multi-mode smart substation simulation system 100 according to an embodiment of the present invention. As shown in Figure 1, the multi-mode intelligent substation simulation system of the present invention includes a traditional metering loop, a semi-digital metering loop and a full-digital metering loop, which can intuitively compare the traditional metering loop, the semi-digital metering loop and the full-digital metering loop. The common points and differences of the metering modes can be viewed in real time for the differences in electric energy metering in the three states; the wiring of the three metering modes can be changed, which can facilitate the trainees to simulate the on-site environment in the laboratory and target the traditional mutual inductance involved. It can also use the existing platform resources, combined with the corresponding calibrator and tester, and adopt the method of parallel and series connection with the loop. The above-mentioned equipment is calibrated and tested in an online or offline simulated on-site real environment; it can solve the practical problems of cognition, installation, commissioning, operation and maintenance of the relevant equipment of the smart substation for newcomers who have initially contacted the smart substation. The multi-mode intelligent substation simulation system 100 provided by the embodiment of the present invention includes: a traditional electric energy measurement module 101 , a semi-digital electric energy measurement module 102 , a full digital electric energy measurement module 103 and an electric energy meter information aggregation processing module 104 .

Preferably, the traditional electric energy metering module 101 is connected to the electric energy meter information aggregation processing module, and is used to measure the electric energy of the current value and the voltage value output by the traditional current transformer and the traditional voltage transformer by using a standard electronic electric energy meter, to obtain the standard value of electric energy metering.

Preferably, the semi-digital electric energy metering module 102 is connected to the electric energy meter information aggregation processing module, and is used for merging and synchronizing the current value and the voltage value output by the traditional current transformer and the traditional voltage transformer by using the analog quantity merging unit processing to obtain first intermediate data, and using a digital electric energy meter to perform electric energy measurement on the first intermediate data to obtain a first electric energy measurement value.

Preferably, the all-digital electric energy metering module 103 is connected to the electric energy meter information aggregation processing module, and is used to combine and combine the current value and voltage value output by the electronic current transformer and the electronic voltage transformer by using the digital quantity merging unit. Synchronous processing is performed to obtain second intermediate data, and a digital electric energy meter is used to perform electric energy measurement on the second intermediate data to obtain a second electric energy measurement value.

Preferably, wherein the system further comprises: a standard riser and a standard booster.

The standard current booster is respectively connected with the traditional current transformer and the electronic current transformer, and is used for outputting the standard current value, and is respectively transmitted to the traditional current transformer and the electronic current transformer;

The standard voltage booster is respectively connected with the traditional voltage transformer and the electronic voltage transformer, and is used for outputting the standard voltage value, which is respectively transmitted to the traditional voltage transformer and the electronic voltage transformer.

Preferably, the analog quantity merging unit and the digital quantity merging unit output the acquired intermediate data to the digital electric energy meter according to the IEC61850 protocol.

Preferably, the electric energy meter information aggregation processing module 104 is respectively connected with a traditional electric energy measurement module, a semi-digital electric energy measurement module and a full digital electric energy measurement module, and is used for using the electric energy measurement standard value, the first electric energy measurement value and the The second electric energy measurement value is used to calculate the measurement error of the semi-digital electric energy measurement module and the full digital electric energy measurement module.

Preferably, the electric energy meter information aggregation processing module reads the electric energy metering standard value, the first electric energy metering value and the second electric energy metering value through the 485 protocol.

In the embodiment of the present invention, the relative error calculation formula is used to calculate the measurement error of the semi-digital electric energy measurement module and the full digital electric energy measurement module.

Preferably, the system further comprises: a merging unit information aggregation processing module, which is connected to the analog quantity merging unit and the digital quantity merging unit respectively, and is used to measure the electric energy according to the first intermediate data and the second intermediate data, to obtain the first electric energy metering verification value and the second electric energy verification value.

Preferably, the system further comprises: an electronic transformer calibrator, a combined unit tester and a digital electric energy meter calibrator.

The electronic transformer calibrator is connected with the electronic voltage transformer and the electronic current transformer, and is used for calibrating the errors of the electronic voltage transformer and the electronic current transformer.

The merging unit tester is connected with the analog quantity merging unit and the digital quantity merging unit, and is used for checking the errors of the analog quantity merging unit and the digital quantity merging unit.

The digital electric energy meter calibrator is connected with the digital electric energy meter, and is used for verifying the error of the digital electric energy meter.

Preferably, the system further comprises: a three-phase analog arbitrary wave transmitter and a three-phase digital arbitrary wave transmitter.

The three-phase analog arbitrary wave transmitter is connected to the analog merging unit for simulating the secondary output of the traditional transformer, outputs a preset analog transformer fault waveform, and transmits it to the analog merging unit for A calculation of the energy metering error under fault conditions is performed.

The three-phase digital arbitrary wave transmitter is connected with the digital merging unit, used for simulating the secondary output of the electronic transformer, outputs the preset digital transformer fault waveform, and transmits it to the digital merging unit, to calculate the energy metering error under fault conditions.

FIG. 2 is an example diagram of a multi-mode smart substation simulation system according to an embodiment of the present invention. As shown in Figure 2, the multi-mode intelligent substation simulation system includes: booster, voltage regulator, current booster, standard PT, standard CT, protocol converter, switch, electronic transformer calibrator, and merging unit tester , digital energy meter calibrator, merging unit MU, protocol converter, three-phase analog arbitrary wave transmitter and three-phase digital arbitrary wave transmitter. The host computer software of the simulation system running on the PC controls the protocol converter through the serial port protocol. The protocol converter matches the three-phase voltage regulator and current booster at the back end, and outputs the three-phase voltage and current values set by the system. The traditional metering circuit, the semi-digital metering circuit and the full digital metering circuit simultaneously collect the voltage value and current value output by the system, and accumulate electric energy. The respective electric energy measurement errors under the three metering modes are used to comprehensively consider the electric energy calculation errors of the three metering modes under different voltage and current values. In addition, an electronic transformer calibrator can be used to simulate the error of the electronic transformer, the merge unit tester can be used to calibrate the merge unit error, and the digital electric energy meter calibrator can be used to calibrate the digital electric energy meter. Find the causes of errors between semi-digital metering loops, full-digital metering loops and traditional metering loops. In addition, the three-phase digital power source and three-phase analog power source are mainly used to simulate the secondary output of traditional transformers and electronic transformers. The three-phase digital power source and three-phase analog power source can output specific analog or digital transformers. The fault waveform is used to simulate the power error of the three metering modes under fault conditions, and to explore the anti-interference performance of the three metering modes.

FIG. 3 is a schematic diagram of three metering mode group lines according to an embodiment of the present invention. As shown in Figure 3, it includes: traditional metering circuit, semi-digital metering circuit and full digital metering circuit. Among them, the traditional metering circuit is composed of traditional transformers (CT, PT) and standard electronic energy meters; the semi-digital metering circuit is composed of traditional transformers (CT, PT), analog merging units and digital energy meters; the full digital metering circuit is composed of It consists of electronic transformers (ECT, EVT), digital merging unit and digital energy meter. The traditional metering loop is mainly used in the early construction of substations; the semi-digital metering mode is mainly used in the intelligent transformation of traditional substations; the full digital metering mode is mainly used in the newly built smart substations with voltage levels of 220kV and below.

In the embodiment of the present utility model, by adjusting the standard booster and the standard current booster to adjust the output voltage and current, the voltage loops of the three metering loops are connected in parallel, and the current loops are connected in series to ensure that the obtained source voltage and current are consistent . The standard electronic energy meter included in the traditional metering loop directly collects the secondary output of the traditional PT and CT, and accumulates the electric energy to obtain the standard value of electric energy measurement. The traditional voltage and current transformer in the semi-digital metering loop is output to the analog merging unit for the second time, and the analog merging unit outputs the intermediate data to the digital electric energy meter through the IEC61850 protocol. Energy metering value. The secondary outputs of the electronic voltage and current transformers in the fully digital metering circuit are directly sent to the digital input merging unit, and the digital merging unit outputs the second intermediate data to the digital energy meter through the IEC61850 protocol, and the digital energy meter analyzes and accumulates electric energy , and obtain the second electric energy metering value. The information aggregation processing module of the electric energy meter takes the accumulated electric energy of the traditional metering circuit as the benchmark, and evaluates the error of the accumulated electric energy in the semi-digital metering circuit and the all-digital metering circuit. Specifically, the electric energy meter information aggregation processing module reads the electric energy metering standard value, the first electric energy metering value and the second electric energy metering value through the 485 protocol, and uses the electric energy metering standard value, the first electric energy metering value and the second electric energy metering value The electric energy metering value is calculated, and the measurement error of the semi-digital electric energy metering module and the full-digital electric energy metering module is calculated, so as to realize the assessment of the error of the accumulated electric energy in the semi-digital metering circuit and the full-digital metering circuit. The energy meter information aggregation processing module reads the electric energy values under the three metering loops through the 485 protocol or other protocols, and calculates the electric energy errors of the three metering loops. In addition, the analog merging unit and the digital merging unit will also send messages to the merging unit aggregation processing module, and use the digital signal transmitted by this module to compare and verify the power calculated by the traditional metering loop to explore the power error in different working modes. ; And read the corresponding electric energy value through the integrated monitoring platform (monitoring module) at the back end to monitor the error calculation.

The present invention has been described with reference to a few embodiments. However, as is known to those skilled in the art, other embodiments than those disclosed above are equally within the scope of the present invention, as defined by the appended patent claims.

Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/the/the [means, component, etc.]" are open to interpretation as at least one instance of said means, component, etc., unless expressly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.

As will be appreciated by those skilled in the art, the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flows of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than limit them. Although the present utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: it is still possible to Modifications or equivalent replacements to the specific embodiments of the present invention, without departing from the spirit and scope of the present invention, should be included within the protection scope of the claims of the present invention.

Claims (7)

1. a multi-mode intelligent substation simulation system, is characterized in that, described system comprises: The traditional electric energy metering module is connected with the electric energy meter information aggregation processing module, and is used for electric energy measurement on the current value and voltage value output by the traditional current transformer and the traditional voltage transformer by using the standard electronic electric energy meter to obtain the electric energy metering standard value ; The semi-digital electric energy metering module is connected with the electric energy meter information aggregation processing module, and is used for combining and synchronizing the current value and voltage value output by the traditional current transformer and the traditional voltage transformer by using the analog merging unit to obtain the first intermediate data, and use a digital electric energy meter to perform electric energy measurement on the first intermediate data to obtain a first electric energy measurement value; The all-digital electric energy metering module is connected to the electric energy meter information aggregation processing module, and is used for combining and synchronizing the current value and voltage value output by the electronic current transformer and the electronic voltage transformer by using the digital quantity merging unit, so as to obtain the first 2 intermediate data, and use a digital electric energy meter to perform electric energy measurement on the second intermediate data to obtain a second electric energy measurement value; an electric energy meter information aggregation processing module, which is respectively connected with the traditional electric energy measurement module, the semi-digital electric energy measurement module and the full digital electric energy measurement module, and is used for utilizing the electric energy measurement standard value, the first electric energy measurement value and the second electric energy measurement value, Calculate the metering errors of the semi-digital power metering module and the full-digital power metering module. 2. The system of claim 1, wherein the system further comprises: The standard current booster is connected to the traditional current transformer and the electronic current transformer respectively, and is used to output the standard current value and transmit it to the traditional current transformer and the electronic current transformer respectively; The standard booster is respectively connected with the traditional voltage transformer and the electronic voltage transformer, and is used for outputting the standard voltage value, which is respectively transmitted to the traditional voltage transformer and the electronic voltage transformer. 3. The system of claim 1, wherein the system further comprises: The merging unit information aggregation processing module is respectively connected with the analog quantity merging unit and the digital quantity merging unit, and is used to perform electric energy measurement according to the first intermediate data and the second intermediate data, so as to obtain the first electric energy measurement verification value and The second power check value. 4. The system of claim 1, wherein the system further comprises: The electronic transformer calibrator is connected to the electronic voltage transformer and the electronic current transformer, and is used to check the error of the electronic voltage transformer and the electronic current transformer; The merging unit tester is connected with the analog merging unit and the digital merging unit, and is used to check the errors of the analog merging unit and the digital merging unit; The digital electric energy meter calibrator is connected with the digital electric energy meter, and is used for calibrating the error of the digital electric energy meter. 5. The system of claim 1, wherein the system further comprises: Three-phase analog arbitrary wave transmitter, connected with the analog merging unit, used to simulate the secondary output of the traditional transformer, output the preset analog transformer fault waveform, and transmit it to the analog merging unit for fault detection Calculation of energy metering error under conditions; The three-phase digital arbitrary wave transmitter is connected to the digital merging unit for simulating the secondary output of the electronic transformer, outputs the preset digital transformer fault waveform, and transmits it to the digital merging unit for Calculation of energy metering errors under fault conditions. 6 . The system according to claim 1 , wherein the electric energy meter information aggregation processing module reads the electric energy metering standard value, the first electric energy metering value and the second electric energy metering value through a 485 protocol. 7 . 7 . The system according to claim 1 , wherein the analog quantity merging unit and the digital quantity merging unit output the acquired intermediate data to the digital electric energy meter according to the IEC61850 protocol. 8 .

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