KR20190045530A - System for analyzing voltage current, Method thereof, Computer readable storage medium having the method - Google Patents

Abstract

The present invention relates to a technique for analyzing voltage and current and, more specifically, to a system and a method for analyzing voltage and current, which enables a protection device to only accurately perform protection by dividing functions and performs a clouding service by storing a voltage/current signal by each substation. The system for analyzing voltage and current includes the multiple substations, multiple intelligent sensors, multiple merging units, and multiple cloud servers.

Description

TECHNICAL FIELD The present invention relates to a voltage-current analysis system, a method thereof, and a computer-readable storage medium storing the method.

The present invention relates to a voltage / current analysis technique, and more particularly, to a voltage / current analysis system and a method for implementing a clouding service by storing a voltage / current signal for each substation, Lt; / RTI >

The way to monitor and confirm all the events in the substation is to protect the signal of CT (Current Transformer), VT (Voltage Transformer), which is installed in a limited position, with copper wire, Intelligent Electric Device (IED) Protection relay), and then each connected device can calculate the algorithm after signal processing.

In addition, there is a method of monitoring the voltage / current signal through a separate process to the upper operating system (HMI) or monitoring it, or by installing a dedicated device (Fault Recorder, power quality IED, etc.) separately. In other words, it can acquire voltage / current from the protection relay (or IED) of the existing substation, process it by signal processing, use the corresponding signal as protection, store the event, transmit it to the upper operating system, A single device performs a number of functions.

In this case, when an event occurs in the substation, the user selects the protective relay (IED) which has not been operated or not, and collects the voltage / current input signal of the device and the waveform of the fault recorder, (SIGRA, Real Time Digital Simulator (RTDS), etc.), and the user confirms the event sequence directly.

In addition, although the performance of the device has been improved, the performance of the device has been increased due to the application of communication functions such as IEC (International Electrotechnical Commission) 61850, and the performance of the CPU There was an ironic problem with trade-offs.

In this case, the signals of CT and VT are moved by the copper cable, and signal processing is performed for each device, and the same signal is transmitted. In addition, there is a disadvantage in that the corresponding device can not be notified of a signal not coming to each device.

In addition, there was a disadvantage that the user had to collect the recorded signals at various points for analyzing the event and analyze them using another program. In addition, there was a disadvantage that the fault waveform had to be stored in a certain server and the user could see the waveform only when the user connected to the fault waveform.

In addition, in order to construct a separate device for signal monitoring, there was a cost burden such as the cost of installing a copper cable, the cost of constructing and manufacturing an additional device, and a need for a manpower for equipment.

Also, there is a problem of a blind spot which can miss all the signals at a time because the user has to select the event signal to analyze for the analysis. In addition, there is a problem that it is necessary to have a high-cost waveform analysis program to perform analysis.

In the past, a single server was used to gather all of the information. To do so, a server that collects and analyzes signals with only one purpose (for example, a fault waveform Collection server).

1. Korean Registered Patent No. 10-1659113 (Registered on 2016.09.13) 2. Korean Patent No. 10-1762534 (Registered on July 27, 2017)

It is an object of the present invention to provide a voltage and current analysis system and method capable of restoring the reliability of a device by reducing the capacity and process burden of existing facilities.

It is another object of the present invention to provide a voltage and current analysis system and method that can immediately apply physical clouding security applied in the field of communication.

It is another object of the present invention to provide a voltage and current analysis system and method for securing an application that can be utilized variously in the future of a digital substation.

It is another object of the present invention to provide a voltage and current analysis system and method which can be expected to have a cost saving effect compared with the conventional system.

The present invention provides a voltage / current analysis system capable of recovering the reliability of a device by reducing the capacity and process burden of existing facilities to achieve the above-described problems.

The voltage / current analysis system includes:

Multiple substations;

A plurality of intelligent sensors for sensing the plurality of substations to generate voltage / current information;

A plurality of merging units for monitoring voltage and current information generated from the plurality of intelligent sensors to determine an abnormal phenomenon and generate sample values as a result of the determination; And

(GOOSE) information indicating events including monitoring, protection, control, and operation of the plurality of substations, and storing the sample values, and using the go-on information and sample values, And a plurality of cloud servers for generating a cloud service for each substation.

The plurality of intelligent sensors may be OCT (Optical Current Transformer) and OVT (Optical Current Transformer) instrumentation transformers.

The merging unit may further include: a signal merging module for receiving and merging the voltage and current information from the plurality of intelligent sensors; A determination module for comparing the voltage and current information with a preset reference value to determine an abnormal phenomenon; And a sample value generation module for converting voltage current information corresponding to an abnormal phenomenon to sample values as a result of the determination.

The voltage / current analysis system may further include a communicator for transmitting the sample values to the cloud server through a process bus network.

Here, the abnormal phenomenon may be characterized by an SV (Sampled Value) abnormal phenomenon based on IEC (International Electrotechnical Commission) 61850-9-2.

In addition, the goose information may be stored in the cloud server through the station bus network at the time when the abnormal phenomenon is determined.

Also, the cloud service may be provided to a user having authority.

Also, the cloud service may display the voltage current acquired by the intelligent sensor at a selected point connected to the single wire in a graph.

In addition, the graph may be arranged to be based on time progression.

Also, the sample values may be time-synchronized signals.

Also, the plurality of cloud servers may provide different cloud services for the plurality of substations.

On the other hand, another embodiment of the present invention provides a method of controlling a power module comprising the steps of: (a) sensing a plurality of substations by a plurality of intelligent sensors to generate voltage / current information; (b) a plurality of merging units monitor the voltage and current information generated from the plurality of intelligent sensors, determine anomalous phenomenon, and generate sample values as a result of the determination; And (c) a plurality of cloud servers storing GOOSE (Generic Object Oriented Substation Event) information indicative of events including monitoring, protection, control and operation of the plurality of substations and the sample values, And generating a cloud service for each of the plurality of substations by using the sampled values.

On the other hand, another embodiment of the present invention can provide a computer-readable storage medium storing the program code for executing the voltage / current analysis method described above.

According to the present invention, protection devices can be protected only by function sharing, and voltage / current signal storage can be accurately performed in a cloud server based on IEC (International Electrotechnical Commission) 61850, that is, Data acquisition and analysis are performed independently by IEC 61850-based cloud servers, enabling reliable operational capability.

Another advantage of the present invention is that security is always considered when configuring all systems. However, when a new technology-based system is used, a security method suitable for the system is configured and made, but input / output signals and information are used for digital substations , And the method applied and applied to the network is based on the cloud server / service currently utilized by Naver, Daum, and Google, so that the physical security method utilized in these communications can be used immediately.

As another effect of the present invention, a digital substation which will soon be a digital substation of a process bus level in which voltage / current acquisition is directly performed in the field on the spot and is transmitted, so a photoelectric transducer (OCT / OVT) It is a necessary primary device for moving to future digital substation and it can be implemented / utilized by applying this photoelectric transformer to digital substation.

Further, another effect of the present invention is limited to voltage / current analysis and monitoring, but since the contents can be utilized in various fields, it can be said that it is a form of application which can be utilized positively in future digital substation.

In addition, as another effect of the present invention, the performance of the existing device is reduced only as an essential element, and the communication-based device such as IEC 61850 is installed, thereby securing the performance of the existing device, Cost savings are possible, and the cloud service / storage technology is a popular technology, so it is expected that the cost substitution effect will be higher over time.

1 is a block diagram of a voltage / current analysis system according to an embodiment of the present invention.
2 is a conceptual diagram illustrating operations of the cloud server 130 and the user 210 shown in FIG.
3 is a detailed block diagram of the cloud server 130 shown in FIG.
4 is a flowchart illustrating a process of analyzing a voltage current according to an embodiment of the present invention to provide analysis data.
5 is a conceptual diagram illustrating a relationship between a plurality of cloud servers and a plurality of users according to an embodiment of the present invention.
6 is a detailed block diagram of the merging unit 11 shown in Fig.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for similar elements in describing each drawing. The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. The term " and / or " includes any combination of a plurality of related listed items or any of a plurality of related listed items.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be construed as ideal or overly formal in meaning unless explicitly defined in the present application Should not.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout.

1 is a block diagram of a voltage / current analysis system 100 according to an embodiment of the present invention. 1, the voltage / current analysis system 100 includes first to n-th substations 10-1 to 10-n, intelligent sensors 13, 14 and 15 arranged in first to n-th substations, A merging unit 11 for merging the sensing signals from the intelligent sensors to determine an abnormal phenomenon, and a cloud server 130 for receiving and storing signals from the merging unit.

The first to nth substations 10-1 to 10-n are digital substations that monitor, control, measure, and protect the substation power facilities in order to enhance the remote operation of the power distribution network, A substation automation system is constructed. It is based on IEC 61850, away from the existing hard-wired system.

The intelligent sensors 13, 14 and 15 may be instrumental transformers such as OCT (Optical Current Transformer) or OVT (Optical Current Transformer), relays, discharge sensors, thermal image sensors, have. The instrument transformer is an electric device that converts the primary electricity quantity of high voltage and large current into the secondary voltage and current suitable for the connecting device such as the measuring instrument, the power meter or the protection relay. The optical transformer (Optical Current Transformer (OCT) , An optical voltage transformer (OVT), a combined voltage and current transformer for a meter, and the like. Of course, the intelligent sensors 13, 14 and 15 may also include closed circuit television (CCTV), on-load tap changer (OLTC), and the like.

Since the instrumental transformer has a very important position in operating the power system such as power metering, line protection, power usage management, and control, it has sufficient insulation strength against the abnormal voltage of the line, And to fully perform its role.

A plurality of intelligent sensors (13, 14, 15) are disposed in a single substation.

The merging unit 11 monitors the voltage and current information generated from the plurality of intelligent sensors to determine anomalous phenomenon, generates sample values as a result of the determination, and transmits the sampled values to the cloud server 130 through the process bus network 110. [ Lt; / RTI >

To this end, the merging unit 11 receives and merges the signals from the intelligent sensors 13, 14, 15 dispersed at the required locations of the substations 10-1 to 10-n, Algorithm, the IEC 61850-9-2 sample value (Sampled Value), and the process bus network 110.

The process bus network 110 processes large amounts of data in real time and high speed, and is Ethernet based and complicated in topology. That is, measurement information (current, voltage, etc.) measured by the intelligent sensors 13, 14, 15 and state information are transmitted to the cloud server 130 side. Of course, it also transmits commands sent from the cloud server 130 to the intelligent sensors 13, 14 and 15.

The station bus network 120 is a network connecting upper devices (substation operating computers, circuit breakers, protective relays, etc.) for controlling the first to nth substations 10-1 to 10-n. Accordingly, the station bus network 120 processes data at a low speed, and is a new high-availability Seamless Redundancy & Parallel Redundancy Protocol (HSR & PRP) technology based on Ethernet and has a simple topology. Therefore, the operation of the breaker and the trip signal of the protection relay are spread to the station bus network 120 with GOOSE (Generic Object Oriented Substation Event) information at the station bus level.

The GoS information represents an event including monitoring, protection, control and operation of the first to n < th > substations 10-1 to 10-n.

The cloud server 130 stores GOOSE (Generic Object Oriented Substation Event) information and the sample values, and generates first to nth substations 10-1 to 10-n using the go- Create a cloud service for each.

The database 131 stores data for providing cloud services, and stores user information, user rights, and the like. Of course, the database 131 may be configured as a database server separately from the cloud server 130.

2 is a conceptual diagram illustrating operations of the cloud server 130 and the user 210 shown in FIG. 2, the cloud server 130 stores GOOSE (Generic Object Oriented Substation Event) information and sample values, and uses the GOOS information and / or sample values to generate a voltage current graph 231, Generates a state / trip signal 233, and generates other sensor signals 234. These are stored in a database 131 in a database. Accordingly, the user 210 can access the cloud server 130 with authority and utilize various application software functions 220 provided by the cloud server 130. The application software functions 220 include a substation line diagram 221, a waveform analysis software 223, a report output function 225, and other analysis software 227.

3 is a detailed block diagram of the cloud server 130 shown in FIG. Referring to FIG. 3, the cloud server 130 includes a signal processing module 310 for processing Generic Object Oriented Substation Event (GOOSE) information and / or sample values in a specific data format, a processed GOOSE An analysis module 320 for analyzing object information and / or sample values to generate analytic data such as a voltage / current graph, and the like to the user 210 at the request of the authorized user 210 And a providing module 330 for providing the information.

4 is a flowchart illustrating a process of analyzing a voltage current according to an embodiment of the present invention to provide analysis data. Referring to FIG. 4, the intelligent sensors 13, 14, and 15 sense the substations 10-1 to 10-n to generate voltage and current information (step S410).

Thereafter, the merging unit 11 monitors the voltage and current information generated from the intelligent sensors 13, 14, and 15 to determine abnormal phenomenon, generates sample values as a result of the determination, and transmits the sampled values to the cloud server 130 130 stores it in the database 131 (step S411). At this time, the sample values are time synchronized signals. The time synchronization may be performed using a clock included in the merging unit 11 itself or may be time information received from the cloud server 130.

At the same time, the cloud server 130 receives and stores the data through the station bus network at the time when an abnormal phenomenon is determined (steps S420 and S421).

After that, the cloud server 130 analyzes the Generic Object Oriented Substation Event (GOOSE) information and / or sample values and generates analysis data such as a voltage / current graph (steps S430 and S440). Of course, all of the voltage currents shown in the graph are time synchronized and are displayed in time-based order for the user selected signal.

Then, the cloud server 130 provides the corresponding information to the user 210 according to the request of the authorized user 210 (step S450).

5 is a conceptual diagram illustrating a relationship between a plurality of cloud servers and a plurality of users according to an embodiment of the present invention. Referring to FIG. 5, the multi-purpose cloud servers 510, 520, 530 and 540 are provided for each substation,

And installing the analysis SW necessary for each substation, it is possible to provide a different cloud service for each of the cloud servers 510, 520, 530, and 540. For example, the first substation 510 may include a failure waveform analysis + partial discharge analysis SW, and the second substation 520 may include a failure analysis SW only. In addition, since there is a server for each substation, users can see reliable signals accurately obtained from the field, and there is a related analysis SW on the server, so that the program can be utilized lightly in the form of a cloud service.

Therefore, the partial discharge signal for each substation can be stored, analyzed, and monitored, and can be provided as analysis data. It can also store, analyze and monitor transformer thermal image by substation and provide it as analysis data.

6 is a detailed block diagram of the merging unit 11 shown in Fig. 6, the merging unit 11 includes a signal merging module 610 for receiving and merging voltage and current information from the intelligent sensors 13, 14 and 15, comparing the voltage and current information with predetermined reference values A sample value generation module 630 for converting the voltage current information corresponding to the abnormal phenomenon into sample values as a result of determination, and transmitting the sample values to the cloud server through the process bus network A communication unit 640, and the like.

The term " module " or the like in the description refers to a unit for processing at least one function or operation, which may be implemented by hardware, software, or a combination of hardware and software.

(DSP), a programmable logic device (PLD), a field programmable gate array (FPGA), a processor, a controller, a microprocessor, and the like, which are designed to perform the above- , Other electronic units, or a combination thereof. In software implementation, it may be implemented as a module that performs the above-described functions. The software may be stored in a memory unit and executed by a processor. The memory unit or processor may employ various means well known to those skilled in the art.

The voltage / current analysis method according to the present invention can be implemented in the form of a program command that can be executed through various computer means and recorded in a computer readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination.

The program code (command) recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like.

The medium may be a transmission medium such as an optical or metal line, a wave guide, or the like, including a carrier wave for transmitting a signal designating a program command, a data structure, or the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

10-1 to 10-n: First to nth substations
11: merging unit
13, 14, 15:
100: Voltage and current analysis system
110: Process bus network
120: station bus network
130: Cloud server
131: Database

Claims (20)

Multiple substations;
A plurality of intelligent sensors for sensing the plurality of substations to generate voltage / current information;
A plurality of merging units for monitoring voltage and current information generated from the plurality of intelligent sensors to determine an abnormal phenomenon and generate sample values as a result of the determination; And
(GOOSE) information indicating events including monitoring, protection, control and operation of the plurality of substations, and storing the sample values, and using the go-on information and sample values, A plurality of cloud servers for generating a cloud service for each substation;
Wherein the voltage-current analysis system comprises:
The method according to claim 1,
Wherein the plurality of intelligent sensors are OCT (Optical Current Transformer) and OVT (Optical Current Transformer) instrumental transformers.
The method according to claim 1,
The merging unit includes:
A signal merging module for receiving and merging the voltage and current information from the plurality of intelligent sensors;
A determination module for comparing the voltage and current information with a preset reference value to determine an abnormal phenomenon; And
And a sample value generation module for converting voltage current information corresponding to an abnormal phenomenon into sample values as a result of the determination.
The method of claim 3,
And transmitting the sample values to the cloud server via a process bus network.
The method according to claim 1,
Wherein the abnormal phenomenon is a Sampled Value (SV) abnormal phenomenon based on IEC (International Electrotechnical Commission) 61850-9-2.
The method according to claim 1,
And the goose information is stored in the cloud server through the station bus network when the abnormal phenomenon is determined. The method according to claim 1,
Wherein the cloud service is provided to a user with authority.
The method according to claim 1,
Wherein the cloud service displays a voltage current obtained by the corresponding intelligent sensor at a selected point in a graph in connection with a single wire in the screen.
9. The method of claim 8,
Wherein the graph is arranged in a time progress basis.
The method according to claim 1,
Wherein the sample values are time synchronized signals.
The method according to claim 1,
Wherein the plurality of cloud servers provide different cloud services for the plurality of substations.
(a) generating a voltage / current information by sensing a plurality of substations by a plurality of intelligent sensors;
(b) a plurality of merging units monitor the voltage and current information generated from the plurality of intelligent sensors, determine anomalous phenomenon, and generate sample values as a result of the determination; And
(c) a plurality of cloud servers storing GOOSE (Generic Object Oriented Substation Event) information indicating an event including monitoring, protection, control and operation of the plurality of substations, and storing the sample values, Generating a cloud service for each of the plurality of substations using sample values;
Wherein the voltage-current analysis method comprises the steps of:
13. The method of claim 12,
Wherein the plurality of intelligent sensors are OCT (Optical Current Transformer) and OVT (Optical Current Transformer) instrumental transformers.
13. The method of claim 12,
Wherein the abnormal phenomenon is a Sampled Value (SV) abnormal phenomenon based on IEC (International Electrotechnical Commission) 61850-9-2.
13. The method of claim 12,
Wherein the goose information is stored in the cloud server through a station bus network when the abnormal phenomenon is determined.
13. The method of claim 12,
Wherein the cloud service is provided to a user with authority.
13. The method of claim 12,
Wherein the cloud service displays a graph of the voltage current acquired by the intelligent sensor at a selected point connected to the single wire in the screen.
13. The method of claim 12,
Wherein the sample values are time synchronized signals.
13. The method of claim 12,
Wherein the plurality of cloud servers provide different cloud services for the plurality of substations.
A computer-readable storage medium storing a program code for executing the voltage / current analysis method according to any one of claims 12 to 19.

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