KR20140014763A - Integrated supply apparatus for energy and fresh water used microgrid - Google Patents

Abstract

The present invention relates to an energy and fresh-integrated supply device using a micro-grid. The device can stably manage the independent driving of the micro-grid and the output intermittence of energy outputted from a new regeneration energy source and integrally manage fresh water facilities producing fresh water through heat energy supplied from the micro-grid so that efficient and stable supply balance can be done. The device also performs the optimal driving of the device by monitoring management and control states of the whole system through integration management. [Reference numerals] (10) Micro-grid system; (20) Fresh water system; (30) Communication network; (40) Obtaining server; (50) Integrated management server; (60) Database; (70) Weather observation; (80) Web server

Description

INTEGRATED SUPPLY APPARATUS FOR ENERGY AND FRESH WATER USED MICROGRID}

The present invention relates to an integrated energy and fresh water supply device using a micro grid, and more particularly, to the thermal intermittent of the energy output from the renewable energy source and the thermal energy supplied from the micro grid while stably managing the independent operation of the micro grid. The present invention relates to an integrated energy and freshwater supply system using microgrids to provide a stable supply and demand balance by integrally managing freshwater facilities that produce freshwater.

There are many places in the world where there are no remote areas, wallpapers or islands that do not provide electricity, heat, and fresh water, which are the basis of human life, and there are many efforts to spread infrastructure in these areas. There is an economic problem to secure power plants, transmission lines and repair facilities, which is not easily secured.

Fortunately, many advanced countries are currently working on developing high-efficiency power and renewable energy technologies to reduce the use of fossil fuels, the main culprit of global warming, and are distributing them to underdeveloped areas as part of pilot projects.

In most cases where it is difficult to supply fuel due to cost or regional location, it is desirable to reduce the proportion of distributed power sources using fuel and to supply renewable energy, a distributed power source using natural power. Because energy production is sensitive to weather conditions and stable supply is difficult, microgrid technology has been spotlighted to bundle various renewable energy sources and energy storage devices such as batteries for stable and efficient operation.

A microgrid is a facility that is composed of a plurality of distributed power and clusters of loads, has an operating system that can automatically control it, and supplies electricity and heat energy.

In addition, in the past, in order to secure freshwater, groundwater was developed or supplied from other regions. However, the development of desalination facilities of various capacities has been underway to supply freshwater using seawater and sewage.

Related prior art is Korea Patent Publication No. 2011-0015306 (2011.02.15.) "Seawater desalination system using solar energy and hydropower generation".

As such, new technologies for supplying energy and fresh water to underdeveloped areas have been developed. However, since energy and water are distributed in separate systems, there are disadvantages in terms of cost and operational efficiency.

Therefore, there is a need to optimally operate the microgrid system that produces energy and a freshwater facility that consumes energy to produce water.

First, there is a need to integrate the operating system of the microgrid system with the operating system of the desalination plant.

Second, the electric power storage device (battery, supercap, etc.) that stores the electric energy produced in the microgrid system, the heat storage tank that stores the heat energy, and the fresh water tank that stores the water produced by the desalination equipment are output according to the state of each. There is a need to adjust so that supply and demand is always balanced.

Third, due to fluctuations in the amount of generation of renewable energy sources and fluctuations in energy demand according to weather conditions and seasons, new renewable energy generation forecasting and energy demand forecasting functions are required for stable energy supply and demand.

The present invention has been created to improve the above problems, fresh water producing fresh water through the thermal energy supplied from the micro grid while stably managing the output intermittent of the energy output from the renewable energy source and the independent operation of the micro grid. The purpose is to provide an integrated supply of energy and fresh water using microgrids to manage the facilities in an integrated manner so that a stable supply and demand balance can be achieved.

Energy and fresh water integrated supply device using a micro grid according to an aspect of the present invention is a micro grid system for supplying electrical energy and thermal energy generated through a plurality of distributed energy generation unit; Freshwater system that receives the thermal energy from the micro grid system and converts the seawater into freshwater to supply freshwater; An acquisition server for acquiring the states of the microgrid system and the freshwater system; And an integrated operation server that receives the operating states of the microgrid system and the desalination system through an acquisition server, and controls the amount of generation of electric energy, heat energy and fresh water generated according to the supply and demand.

The present invention is characterized in that it further comprises a database for storing the operating status and the amount of production obtained from the integrated operation server and the performance information and cost information of the microgrid system and fresh water system.

In the present invention, the integrated operation server is characterized in that the reserve rate is determined by predicting the amount of power generated in the plurality of distributed energy generation unit according to the weather information input from the meteorological observation unit.

The present invention is characterized in that it further comprises a web server for providing an operating state of the integrated operation server via the Internet.

In the present invention, the plurality of distributed energy generation units include a solar power generation unit, a wind power generation unit, a cogeneration unit, and an auxiliary boiler.

In the present invention, the microgrid system includes an energy storage unit for storing the generated electrical energy; A heat storage tank for storing thermal energy; And a refrigerator for generating cold heat by receiving electrical energy or thermal energy.

Desalination system in the present invention is characterized in that it further comprises a desalination tank for storing the fresh water generated in the desalination equipment.

In the present invention, the microgrid system is characterized in that it further comprises a commercial power system.

The present invention provides an efficient and stable supply and demand balance by integrated management of freshwater facilities that produce fresh water through thermal energy supplied from microgrids while stably managing the intermittent output of energy output from renewable energy sources and independent operation of microgrids. Can be done.

In addition, the present invention can monitor the operation and control state of the entire system through the integrated operation can perform the optimal operation of the device.

In addition, the present invention is to produce energy through the microgrid to maintain a stable supply and demand by building in various sizes and configurations according to the environment and energy demand of the target area.

1 is a block diagram showing an integrated energy and fresh water supply apparatus using a micro grid according to an embodiment of the present invention.
Figure 2 is a block diagram showing in detail the configuration of the microgrid system and desalination system according to an embodiment of the present invention.
3 is a flow chart for explaining the operation of the integrated energy and fresh water supply apparatus using a micro grid according to an embodiment of the present invention.
Figure 4 is a block diagram showing an integrated energy and fresh water supply apparatus using a micro grid according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the integrated energy and fresh water supply apparatus using a microgrid according to the present invention. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is a block diagram showing an integrated energy and fresh water supply apparatus using a micro grid according to an embodiment of the present invention, Figure 2 shows a configuration of a micro grid system and a fresh water system according to an embodiment of the present invention in detail It is a block diagram.

1 to 2, the integrated energy and fresh water supply device using a micro grid according to an embodiment of the present invention includes a micro grid system, fresh water system, acquisition server and integrated operation server.

The microgrid system shown in FIG. 2 is an independent microgrid system that supplies electrical energy and thermal energy generated through a plurality of distributed energy generating units.

In this case, the plurality of distributed energy generation units include a solar power generation unit 11, a wind power generation unit 12, a cogeneration unit 13, and an auxiliary boiler 14.

The solar power generation unit 11 and the wind power generation unit 12 produce electric power in wind and solar radiation as a renewable energy source.

In addition to photovoltaic power generation and wind power generation, renewable energy sources such as solar, bioenergy, and geothermal power may be used as renewable energy sources.

The cogeneration unit 13 drives a generator (not shown) through fossil fuel, has an engine generator and a turbine generator, and has a waste heat recovery boiler (not shown) to simultaneously supply power and heat energy.

The auxiliary boiler 14 is a type of fossil fuel input and a type of electricity input and outputs hot water (steam).

In addition, the microgrid system 10 may further include an energy storage unit 15, a heat storage tank 16 and a refrigerator 17.

Energy storage unit 15 may be composed of a battery (not shown) or a supercapacitor (not shown), and can store the supplied electrical energy, the solar power generation unit 11 for supplying electricity through charge and discharge, It is used to optimally control the supply-demand balance between the output of the wind power generation unit 12 and the cogeneration unit 13 and the power demand.

The heat storage tank 16 is used to optimally control the supply and demand balance between the heat and demand of the heat recovery boiler and the auxiliary boiler 14 of the cogeneration unit 13 by storing heat energy.

The refrigerator 17 has a type for inputting electricity and a type for inputting heat, and in the case of an electric input, electricity output from the solar power generation unit 11, the wind power generation unit 12, and the cogeneration unit 13. To receive the input, the input of the heat receives the hot water (steam) generated by the cogeneration unit 13 and the auxiliary boiler 14 receives the cold heat (cold water).

The desalination system 20 receives thermal energy from the microgrid system 10 by the desalination facility 21 to convert seawater into freshwater and supply freshwater.

That is, hot water (steam) is input from the cogeneration unit 13 and the auxiliary boiler 14 of the microgrid system 10 and outputs fresh water.

The fresh water system 20 is used to optimally control the supply-demand balance between fresh water supplied from the fresh water facility 21 and fresh water demand by storing the fresh water supplied through the fresh water tank 22.

As such, the power demand is in charge of the photovoltaic power generation unit 11, the wind power generation unit 12, and the cogeneration unit 13, which are new and renewable energy sources, and the heat demand is the waste heat recovery boiler and the auxiliary boiler of the cogeneration unit 13. (14), and the cold and hot demand of the solar power generation unit 11, the wind power generation unit 12 and the cogeneration unit 13 using the power of the cogeneration unit 13 and the auxiliary boiler 14 Using the heat through the freezer (17), fresh water demand is in charge of the fresh water system (20).

The acquisition server 40 acquires the state of the microgrid system 10 and the fresh water system 20 in real time via a communication network.

The integrated operation server 50 receives the operation state of the micro grid system 10 and the desalination system 20 through the acquisition server 40 to adjust the amount of electrical energy, heat energy and fresh water generated according to the supply and demand.

In this case, the integrated operation server 50 may determine the reserve rate by predicting the amount of power generated by the plurality of distributed energy generation units according to the weather information input from the meteorological observation unit 70.

Real-time meteorological observation data may be acquired through the meteorological observation unit 70, and a probability function may be applied through cumulative data to predict generation amounts of the solar power generation unit 11 and the wind power generation unit 12, which are renewable energy sources.

Based on the predicted power generation amount, the proper charging amount of the energy storage unit 15 and the reserve ratio of the cogeneration unit 13, the auxiliary boiler 14, the heat storage tank 16, and the refrigerator 17 are determined to secure a stable energy supply and demand balance. can do.

In addition, the database 60 may store not only the operation state and the amount of production obtained from the integrated operation server 50, the performance information and the cost information of the microgrid system 10 and the freshwater system 20, as well as the past history.

And, it may further include a web server 80 for providing an operating state of the integrated operation server 50 over the Internet.

The micro grid system 10 and the fresh water system 20 is provided with a network gateway (not shown) for converting a protocol to exchange the unified information when communicating with the integrated operation server 50 through the communication network 30 In order to perform control commands from the integrated operation server 50 and exchange information, a lower control unit (not shown) such as a power conditioning system (PCS) or a programmable logic controller (PLC) is provided according to the type of device.

The lower control unit such as PCS is provided in the solar power generation unit 11, the wind power generation unit 12, and the energy storage unit 15 to determine whether to perform the command and control amount of the integrated operation server 50.

The lower control unit is also configured between the heat storage tank 16 and the fresh water tank 22, and the lower control unit for the heat storage tank acquires the quantity and the water temperature in real time through a sensor to determine whether to perform the command of the integrated operation server 50, and to determine the appropriate quantity and the water temperature. The quantity and water temperature of the heat storage tank 16 are controlled based on the limit value of.

In addition, the lower control unit for the freshwater tank obtains the freshwater in real time through the sensor to determine whether to perform the command of the integrated operation server 50, and controls the freshwater based on the limit value of the appropriate freshwater.

The operation of the integrated energy and fresh water supply device using the micro grid will be described with reference to a flowchart for explaining the operation of the integrated energy and fresh water supply device using the micro grid according to an embodiment of the present invention.

First, the integrated control server 50 loads device performance information and cost information for power generation of the microgrid system 10 and the desalination system 20 from the database 60 (S10).

Then, the storage state of the energy storage unit 15, the heat storage tank 16 and the fresh water tank 22 measured through the acquisition server 40 is received (S20).

In addition, the power supply, heat, cold and fresh water supply amount and the power, heat, cold and fresh water demand amount in the micro grid system 10 and the fresh water system 20 is acquired through the acquisition server 40 (S30).

The operation state of the microgrid system 10 and the freshwater system 20 is determined by performing an optimization operation based on the acquired information and performance information and cost information, which are fixed information of the device (S40).

At this time, the optimization calculation is performed to minimize the cost (variation cost), so that the operation (fuel) cost of the microgrid system 10 and the freshwater system 20 is minimized, and the power supply balance, heat supply balance, and fresh water supply balance are satisfied. Determine the operating condition.

Figure 4 is a block diagram showing an integrated energy and fresh water supply apparatus using a micro grid according to another embodiment of the present invention.

The microgrid system shown in FIG. 4 is a grid-connected microgrid system 10 that is connected to a commercial power system and receives power from the power system 18 according to the situation of the microgrid system 10, or the microgrid system 10. ) Can transmit power.

That is, in the event of an accident of the power system 18, the microgrid system 10 may be operated by itself, and on the contrary, when the power output of the microgrid system 10 is insufficient, power reception is possible from the power system 18. .

Therefore, in the case of a grid-connected microgrid system, an optimization operation is performed by reflecting a market purchase price and a power sale price of the commercial power system 18 when determining an operation state.

That is, the amount of power reception or the amount of power transmission is optimally selected according to the difference in power rates in the power system 18 and the microgrid system 10.

In this way, when the grid-connected microgrid system is applied, the optimization calculation is to maximize profit, and the power supply is provided by {power selling cost + freshwater selling cost}-{power purchasing cost + microgrid system and operation (fuel) cost of freshwater system}. Operation conditions are determined by calculating the balance, heat supply and demand balance, and fresh water supply and balance constraints to be satisfied.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Accordingly, the technical scope of the present invention should be defined by the following claims.

10 microgrid system 11 solar power generation unit
12: wind power generation unit 13: cogeneration unit
14: auxiliary boiler 15: energy storage unit
16: heat storage tank 17: freezer
18: Power system 20: Desalination system
21: desalination plant 22: desalination tank
30: communication network 40: acquisition server
50: integrated operation server 60: database
70: meteorological observation unit 80: web server

Claims (8)

A microgrid system for supplying electrical energy and thermal energy generated through a plurality of distributed energy generation units;
A freshwater system receiving the thermal energy from the microgrid system and converting seawater into freshwater to supply the freshwater;
An acquisition server for acquiring a state of the microgrid system and the freshwater system; And
And an integrated operation server configured to receive the operating states of the microgrid system and the desalination system through the acquisition server, and to control the amount of generation of the electric energy, the heat energy, and the freshwater generated according to the supply and demand. Integrated energy and fresh water supply system using grid.
The energy using the microgrid according to claim 1, further comprising a database for storing the operation state and the amount of production obtained from the integrated operation server, the performance information and the cost information of the microgrid system and the desalination system. Freshwater Integrated Supply.
The energy and fresh water using the microgrid according to claim 1, wherein the integrated operation server determines a reserve rate by predicting the amount of power generated by the plurality of distributed energy generation units according to the weather information input from the meteorological observation unit. Integrated feeder.
[Claim 2] The integrated energy and freshwater supply device using the microgrid according to claim 1, further comprising a web server for providing an operation state of the integrated operation server through the Internet.
According to claim 1, wherein the plurality of distributed energy generation unit solar power generation unit, wind power generation unit, cogeneration unit and auxiliary boiler, energy and fresh water integrated supply apparatus using a microgrid.
The system of claim 1, wherein the microgrid system is
An energy storage unit for storing the generated electrical energy;
A heat storage tank for storing the thermal energy; And
Energy and freshwater integrated supply device using a micro-grid further comprises a refrigerator for receiving the electrical energy or the thermal energy to generate cold heat.
According to claim 1, The desalination system is an integrated supply of energy and fresh water using a micro grid, characterized in that it further comprises a fresh water tank for storing the fresh water generated in the fresh water facility.
2. The integrated energy and freshwater supply system using a microgrid according to claim 1, wherein the microgrid system further comprises a commercial power system.

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