KR100928186B1 - Data connection arbitration device and communication system having same - Google Patents

Abstract

Provided are a data connection arbitration apparatus and a communication system having the same, which can easily perform mutual interface between a commercial real-time simulation system and a developed microgrid management system. The display device displays the main operation state. The communication interface sends and receives signals for monitoring and controlling the status of the microgrid management system and the component devices of the microgrid. The hard wire interface sends and receives operating states and control commands of the major elements of the microgrid that are simulated by the real-time simulator. The processor processes input / output control and monitoring information from the hard wire interface and implements and executes various communication protocols for driving the communication interface. The EPLD controls the communication interface, the hard wire interface, and the display device.

Description

Data link broker and communication system with the same {Data link broker and communication system with the same}

The present invention relates to a microgrid management system, and more particularly, to the development of a microgrid management system, which is a device used to manage and control a microgrid system including a plurality of distributed power supplies, loads, and power distribution facilities. An empirical test facility for use in the present invention relates to an apparatus for mediating data (communication and hardwire) connections between a real time simulation system of a microgrid and a microgrid management system and a communication system having the same.

The data connection arbitration device of the present invention is a microprocessor-based control device, a communication module for communication interface with a microgrid management system, an analog and digital input / output module for a hardwire interface with a real-time simulation system, and a display for status display. It is composed of modules, etc., and communicates with the microgrid management system user interface software to process and store multiple data.

1 is a view showing the configuration of a general microgrid management system. As shown in FIG. 1, the microgrid management system is a device used for managing and controlling a microgrid system including a plurality of distributed power supplies, loads, and power distribution facilities. The microgrid management system aims to optimally control the components (distributed power, load, distribution facilities, etc.) of the microgrid system to be managed so that the electrical and thermal energy networks can be operated with high reliability and high quality. For this purpose, the software is composed of modules such as Energy Management, Grid Protection, Demand Area Management and Estimation, and in hardware, it is composed of components that make up the microgrid. It consists of a communication device for information exchange and control commands, and a main computing unit on which operating algorithms are performed.

The microgrid management system consists of two parts, the control algorithm for optimal control of the microgrid and the hardware for executing it. The off-line simulation is used to develop the algorithm and to scale down the test, such as a pilot plant, to verify the hardware. Use equipment. Since these two development tests are conducted separately, the development period and cost are high. In some cases, a real-time simulation system is applied to simultaneously verify algorithms and systems, but in this case, a real-time simulation system does not support an appropriate communication interface with a microgrid management system. .

A first object of the present invention is to solve the conventional problems as described above, and a data connection arbitration apparatus for easily performing a mutual interface between a commercial real-time simulation system and the developed microgrid management system and the same It is to provide a communication system provided.

A second object of the present invention is to obtain the development and verification of a communication protocol for use in a microgrid management system using the same communication interface as the actual microgrid management system.

In order to achieve the above object, the data connection arbitration apparatus according to the present invention includes a display device for displaying a main operation state; A communication interface for transmitting and receiving signals for monitoring and controlling the state of the microgrid management system and the component devices of the microgrid; A hard wire interface for sending and receiving operating states and control commands of the major microgrid components simulated by the real-time simulation device; A processor which processes input / output control and monitoring information from the hard wire interface and implements and executes various communication protocols for driving the communication interface; And an EPLD for controlling the communication interface, the hard wire interface, and the display device.

According to another aspect of the present invention, a communication system includes a microgrid management system for managing and controlling a microgrid system including a plurality of distributed power supplies, loads, and power distribution facilities; A real time simulation apparatus for simulating a microgrid model in real time; And a data connection arbitration device for arbitrating data connection between the microgrid management system and the real-time simulation device.

First, the experimental system using the microgrid data connection mediation apparatus proposed in the present invention enables the computer-based real-time simulation apparatus and interface to be the same as the actual microgrid operation situation, the same effect as the actual microgrid pilot plant. It provides a way to drastically reduce the cost and time required to build and test equipment.

Second, it is easy to use the real-time simulation system so that any microgrid system can be simulated in real time under any steady state or transient operation conditions, and the same effect as the real operation situation can be reproduced with reliability in real time. It is a useful tool for identifying static and dynamic characteristics of microgrids and management systems and for reviewing problems that may arise during grid-connected operation.

Third, since the communication protocol of the microgrid management system can be arbitrarily changed and it is easy to configure or reproduce any communication situation, it is a main means of developing and verifying a communication protocol suitable for the microgrid system.

Fourth, since the experimental system proposed in the present invention uses a computer-based real-time simulator system, it is possible to secure the reliability of real-time simulation results through many existing results and to use various components arbitrarily by using a software-based model. It can be easily changed to improve the convenience of use.

Fifth, since the experimental system proposed in the present invention uses a real-time simulation system, it is easy to make the operating state of the microgrid, and since the actual system is not used, the operation cost and maintenance and maintenance cost can be reduced, and the system configuration can be easily developed. The characteristics of the evaluation system can be improved by reducing time and diversifying evaluation functions.

Sixth, the experimental system proposed in the present invention is easy to make any transient state of the power system, it is possible to effectively and safely evaluate the transient state characteristics of the microgrid and management system.

Seventh, the experimental system proposed in the present invention can be repeatedly tested by randomly setting the power generation conditions of the distributed power supply, making it easy to verify the operation reliability of the microgrid management system.

The present invention seeks to solve and improve the following major problems in the prior art.

First, off-line algorithm development mainly uses system analysis software, and off-line simulation by analysis software is basically based on system modeling. The modeling of the system is based on a number of assumptions that make it possible to formulate the static and dynamic characteristics of the actual system. Therefore, the development environment by the off-line simulation environment is accompanied by a lot of error fundamentally, there is a problem that there is some limitation in reproducing the situation that can occur in the actual system. Therefore, the algorithm developed in the off-line simulation environment must be implemented in the microgrid management system and applied to the scale-down test facility to correct errors, which has problems in terms of development time and cost.

Second, whether the algorithm developed in the off-line simulation environment and the matters that were not reviewed in the off-line development environment should be implemented in the microgrid management system and subjected to error correction (debugging) process. ) Is required. The microgrid system, which is the operation target of the microgrid management system, is a system in which various distributed power supplies, loads, and various power distribution devices are mixed. Therefore, in order to construct a pilot plant that can reflect the characteristics of a microgrid system, a power distribution system of a reduced form must be configured. Since the configured distribution system must be able to reflect the characteristics of various distributed power supplies and also include various distribution system components, the construction of such a pilot plant requires a lot of space and power equipment and protection equipment, which requires a lot of time and money. . In addition, since the system is configured using a real system, there are many constraints for safe operation due to the characteristics of the electric system, and in the case of a distributed power supply using renewable energy, it is impossible to set and repeatedly reproduce arbitrary operating conditions. In addition, due to physical limitations, it is not easy to change the configuration of the system and the actual energy must be used. There is also a constant cost of maintenance for a reliable system. Therefore, although the functional and performance test of the microgrid management system using the actual system requires a lot of cost, there is a problem that there are many constraints in evaluating arbitrary characteristics.

Third, there is a method using a real-time simulation system to solve the above two problems at the same time. However, in the case of commercial real-time simulation system, the hardware method provided as an interface for real-time reflection of the main variables of the internal simulation model during the real-time simulation is analog using ADC (Analog to Digital Converter) and DAC (Digital to Analog Converter). Provides only digital interface for interface and relay contact drive and input. Therefore, in order to develop a microgrid management system using a real-time simulation system, it is necessary to have a real-time simulation system and an interface device. However, in the case of the microgrid management system, since the interface with the real-time simulation system is not used in the actual microgrid system, this interface module becomes an additional element used only in the development of the entire system, which adds to the development cost of the system. In addition, the direct interface method has a problem in that a separate test is required to examine a problem that may be caused by communication because the characteristics of the system are different from the communication method used in the actual system.

Hereinafter, a data connection arbitration apparatus for a microgrid management system according to an embodiment of the present invention will be described in detail with reference to the accompanying example drawings. 2 is a diagram showing the configuration of a test system using a real-time simulation apparatus that can be applied to the present invention. FIG. 3 is a diagram showing a configuration of a communication system having a data connection arbitration apparatus according to an embodiment of the present invention.

A communication system having a data connection arbitration apparatus according to an embodiment of the present invention includes a microgrid management system 210, a real time simulation apparatus 220, and a data connection arbitration apparatus 300.

The microgrid management system (hereinafter, referred to as 'MMS') 210 manages and controls a microgrid system including a plurality of distributed power supplies, loads, and power distribution facilities.

MMS 210 includes an MMS core 212, a user interface 214, and a communication interface 216. The MMS core 212 performs control and monitoring algorithm operations for implementing the main functions of the MMS 210. The user interface 214 is a user manipulation device for monitoring and operating the microgrid, and corresponds to a screen or an input / output control panel such as a graphical user interface (GUI). The communication interface 216 serves as an interface for communicating with the component devices. The communication interface 216 is a communication module for transmitting and receiving signals for monitoring and controlling the status of the component devices of the microgrid. CAN, ModeBus, Ethernet, etc ...).

A real time digital simulator (hereinafter referred to as RTDS) 220 simulates a microgrid model in real time.

The RTDS 220 is a device that simulates a microgrid model in real time. The hard wire interface module 240 for interface with an external device in a real time simulation state, a real time simulation engine 260 for real time simulation, and a real time simulation It consists of a microgrid model 280 to be simulated. The real time simulation engine 240 is a device for simulating a model defined by a user in real time. The microgrid model 260 is an application target of the MMS 210.

The hardwire interface 280 is an input / output device for reflecting the operation state and control commands of the major microgrid components simulated by the RTDS 220 in a real-time simulation state, and the ADC 282 and the DAC 284 for analog input / output. ), And a DIO module 286 for digital input / output. The ADC 282 may reflect the analog output command (an effective power generation amount, load state, voltage and frequency control reference values, etc.) received from the MMS 210 in the real time simulation. The DAC 284 transmits the voltage, current, voltage of main bus, frequency, phase angle, etc., which are important information of the microgrid configuration module, to the outside in a real-time simulation state. Main information for controlling and monitoring the grid is output in analog form. The DIO module 286 is simulated in real time with the digital output command of the MMS (Open / Close of a switch, Run / Stop operation of an element device, etc.). Main function (Open / Close of main switch, Run / Stop state of element device, etc.) is transmitted to MMS 210.

The data connection arbitration apparatus 300 mediates the data connection between the microgrid management system 210 and the real time simulation apparatus 220. The data connection arbitrator 300 is an apparatus for emulating the communication functions of the microgrid component devices. The data connection arbitrator 300 is connected to the communication interface 310 with the MMS 210. 320 and EPLD 330. The operating status and control commands of the microgrid components are connected to the Real Time Digital Simulator (RTDS) 220 using the hardwired interface 340 and have a separate status display device 350 for displaying the status of the mediation device. .

The data connection arbiter 300 includes a display device 310, a communication interface 320, a hardwire interface 330, a processor 340, and an EPLD 350.

The display device 350 indicates a main operation state of the data connection arbitration device. The communication interface 320 is a communication module for exchanging signals for monitoring and controlling the state of the MMS 210 and the component devices of the microgrid. Various communication means (RS485, CAN, ModeBus, Ethernet, etc ... It is composed of

The hard wire interface 330 is an input / output device for transmitting and receiving operating states and control commands of the microgrid main components simulated by the RTDS 22.

The hardwired interface 330 is an analog to digital converter (ADC) 332 for analog input / output and a digital to analog converter (DAC) 334 ), Digital input and output (hereinafter referred to as 'DIO', 336) module for digital input and output.

The DAC 332 functions to transmit the analog output command received from the MMS 210, that is, the effective power generation amount, the load state, the voltage and the frequency control reference value, and the like to the real-time simulator 220. The ADC 334 reads an important state of the microgrid configuration module implemented in the RTDS 220, that is, voltages, currents, voltages of main buses, frequencies, phase angles, and the like, and transmits them to the MMS. The DIO module 336 transmits a digital output command (Open / Close of a switch, Run / Stop operation of an element device, etc.) received from the MMS 210 to the real-time simulation device 210 or simulated in the real-time simulation device. It reads the main state (Open / Close of main switch, Run / Stop state of element device, etc.) and delivers it to MMS 210.

The processor 340 processes input / output control and monitoring information from the hardwire interface 340 and implements and executes various communication protocols for driving the communication interface 310. The EPLD 350 controls the display device 310, the communication interface 320, and the hard wire interface 330.

In the present invention, the real-time simulation device 220 is a device for simulating in real time the microgrid system composed of various power distribution devices such as distributed power supply, load, line. The real-time simulation device is composed of software and hardware to simulate the target model configured in the simulation device in real time, and it is a system that can interface I / O with the internal device in simulation in real time. Therefore, any microgrid system to which the microgrid management system is to be applied is implemented in the real-time simulation device so that the microgrid management system to be developed can be tested in the same situation as the actual system.

The microgrid management system 210 monitors the results being simulated in the real-time simulation system using the communication interface using the communication interface in the same situation as the actual microgrid, and uses the collected information to communicate the appropriate control command using the communication. To reflect on the real-time simulation system.

The data connection arbitration apparatus 300 is connected to the micro management system 210 using a communication interface, and the communication method and protocol used at this time use the same as that actually applied. In addition, the real-time simulation device 220 obtains information used in real systems such as voltage, current, power, and circuit breaker contact information of the micro grid in real time, and provides appropriate information through communication according to the request of the micro management system. The output and control information created by the micro management system is processed through the communication in the same way as the real one, and then processed into the appropriate type of information that can be reflected in the real-time simulation and reflected in the real-time simulation through the hardwired interface.

Although the present invention has been described as a specific preferred embodiment, the present invention is not limited to the above-described embodiments, and the present invention is not limited to the above-described embodiments without departing from the gist of the present invention as claimed in the claims. Anyone with a variety of variations will be possible.

The data connection arbitration apparatus and communication system according to the present invention can be used in the field of microgrid management system.

1 is a view showing the configuration of a general microgrid management system.

2 is a view showing the configuration of a test system using a real-time simulation apparatus that can be applied to the present invention.

3 is a diagram illustrating a configuration of a communication system according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

210: microgrid management system 212: MMS core

214: MMS user interface 220: real-time simulator

240: real-time simulation engine 260: microgrid model

280,330: hard-wired interface 282,334: analog-to-digital converter

284,332: Digital to Analog Converters 286,336: Digital Input and Output Modules

300: data connection arbitration device 310: display device

320: communication interface 340: processor

350: EPLD

Claims (8)

A display device for displaying a main operation state; A communication interface for transmitting and receiving signals for monitoring and controlling the state of the microgrid management system and the component devices of the microgrid; A hard wire interface for sending and receiving operating states and control commands of the major microgrid components simulated by the real-time simulation device; A processor which processes input / output control and monitoring information from the hard wire interface and implements and executes various communication protocols for driving the communication interface; And And an EPLD for controlling the communication interface, the hard wire interface, and the display device. The method of claim 1, wherein the hard wire interface is A digital-to-analog converter for transmitting an analog output command including a reactive power generation amount, a load state, a voltage, and a frequency control reference value received from the microgrid management system to the real-time simulator; An analog / digital converter that reads the voltage, current, voltage, frequency, and phase angle of element devices, which are important states of the microgrid configuration module implemented in the real-time simulation device, and transmits them to the microgrid management system; Intermediate data connection including a digital input and output module for transmitting the digital output command received from the microgrid management system to the real-time simulation device or reading the main state simulated by the real-time simulation device and delivering the key state to the microgrid management system. Device. A microgrid management system for managing and controlling a microgrid system including a plurality of distributed power supplies, loads, and power distribution facilities; A real time simulation apparatus for simulating a microgrid model in real time; And And a data connection arbitration device that mediates a data connection between the microgrid management system and the real time simulation device. The system of claim 3, wherein the microgrid management system is A microgrid management system core for performing control and monitoring algorithm operations for implementing the main functions of the microgrid management system; A user interface functioning as a user manipulation device for monitoring and operating the microgrid; And And a communication interface for transmitting and receiving a signal for monitoring and controlling the state of the component devices of the microgrid. The apparatus of claim 3, wherein the real-time simulation apparatus The real time simulation engine for simulating a model defined by a user in real time; A microgrid model to which the microgrid management system is applied; And a hardwired interface for reflecting operating states and control commands of the simulated microgrid major components in a real-time simulated state. The method of claim 5, wherein the hardwire interface, An analog / digital converter configured to reflect an analog output command including a real power generation amount, a load state, a voltage, and a frequency control reference value received from the microgrid management system in a real-time simulation; It transmits the voltage, current, voltage of main bus, frequency, and phase angle of element equipment, which are important information of microgrid configuration module, to the outside in real time simulation state, and is important information for controlling and monitoring microgrid in the microgrid management system. Digital to analog converter for outputting the analog form; And And a digital input and output module for transmitting the digital output command of the microgrid management system and the main state simulated in real time to the microgrid management system. The apparatus of claim 3, wherein the data connection arbitration apparatus A display device for displaying a main operation state of the data connection arbitration device; A communication interface for exchanging signals for monitoring and controlling status of the microgrid management system and the component devices of the microgrid; A hard wire interface for sending and receiving operating states and control commands of the major microgrid components simulated by the real-time simulation device; A processor which processes input / output control and monitoring information from the hard wire interface and implements and executes various communication protocols for driving the communication interface; And And an EPLD for controlling the communication interface, the hard wire interface, and the display device. The method of claim 7, wherein the hard wire interface is A digital-to-analog converter for transmitting an analog output command including a reactive power generation amount, a load state, a voltage, and a frequency control reference value received from the microgrid management system to the real-time simulator; An analog / digital converter that reads the voltage, current, voltage, frequency, and phase angle of element devices, which are important states of the microgrid configuration module implemented in the real-time simulation device, and transmits them to the microgrid management system; And Communication system including a digital input and output module for transmitting the digital output command received from the microgrid management system to the real-time simulation device or read the main state simulated by the real-time simulation device to the microgrid management system. .

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