KR20210086541A - Cogeneration system remotely controlled by the complex grid EMS platform - Google Patents

Abstract

Disclosed is a combined heat and power system remotely controlled by a combined grid EMS platform, wherein it is possible to remotely control cooling or heating by supplying electricity generated by a cogeneration unit using gas as a fuel source and efficiently managing waste heat generated in the cogeneration unit. The combined heat and power system remotely controlled by such a combined grid EMS platform comprises: a cogeneration system (100) including a cogeneration unit (110), a power receiving facility unit (120), a waste heat supply unit (130), an absorption chiller (170), and a waste heat recovery unit (140); an air conditioning control unit (200) which is installed to be connected to the output terminal of the waste heat supply unit (130) of the cogeneration system (100), cooling or heating the temperature of water to a preset temperature range from the waste heat supply unit (130) to the absorption chiller (170) or the energy facility (190) according to a user's setting or control; and a microgrid energy management system (EMS) platform (300) that periodically collects the power of the power generation system and the storage system or the temperature of the cooling and heating medium according to the user's setting or control, storing and analyzing the temperature results of the collected power or cold and thermal media, and performing integrated control and management of the supply amount and temperature of power, cooling, and heat medium according to an analysis result.

Description

Cogeneration system remotely controlled by the complex grid EMS platform

The present invention relates to a combined heat and power generation system remotely controlled by a combined grid EMS platform, and more particularly, to a combined heat and power generation heating and cooling system that can provide all-season heating (hot water supply), cooling, and power supply with one facility using the same fuel. It relates to a cogeneration system remotely controlled by a combined grid EMS platform that can remotely control the system.

Conventionally, electric energy is supplied from power companies in apartment complexes, office buildings, and small factory complexes that consume a large amount of electrical energy and thermal energy. However, there are many cooling heat loss and transmission loss due to power generation, and thermal energy for heating or cooling is not Thermal efficiency is remarkably low due to irregular and intermittent supply of thermal energy using its own boiler or refrigerant air conditioner.

Cogeneration, which supplies thermal and electrical energy at the same time by solving the above problems, reduces the burden of large-scale power plant construction compared to general generators, which have a lot of transmission loss due to transmission from a remote location, and directly supplies electricity from energy demanding areas such as electricity It is a high-efficiency energy technology that has low transmission loss and can respond immediately to energy demand, and is useful by recovering waste heat (heat) that is inevitably generated in the process of generating electricity from a generator and receiving fuel. In this way, since the cogeneration system is a comprehensive energy system that simultaneously produces power and heat, which are secondary energy, from one primary energy source, it saves energy such as electricity and fuel by 30-40% compared to the conventional power generation method. As it has the advantage of being environmentally friendly and energy-saving as a result, the demand for multi-unit houses such as apartments, office buildings, and small and medium-sized industrial complexes is increasing explosively. Among them, gas and cogeneration power generation using gas such as LNG as fuel It is eco-friendly, and it converts the peak demand for electricity in summer into gas demand, so seasonal demand can be managed. Cogeneration using a gas turbine engine has the advantage of being able to operate continuously for 24 hours.

For example, in the Republic of Korea Utility Model Publication No. 20-0369438 (November 25, 2004), electricity generated from a cogeneration facility using gas as a fuel source is supplied, and at the same time, a medium hot water absorption type with a heat storage function is supplied to the cogeneration device. The combined heat and power heating and cooling system is described as a single facility that uses the same fuel by installing a refrigerator to perform cooling by waste heat of the cogeneration facility, which can provide all-season heating (hot water supply), cooling, and power supply.

In addition, in Korean Patent Laid-Open Publication No. 10-2006-0065873 (June 14, 2006), an engine, a generator, a waste heat recovery device, and a heat dissipation device are made up of one unit, which is compact, simple in structure and control, and works A cogeneration system with improved performance is described.

However, such a conventional combined heat and power cooling system and cogeneration system is one or more power generation systems including a combined heat and power system (CHP), a photovoltaic system (PV), an energy storage system (ESS), and a fuel cell (FC). And there was a problem in that it is not easy to efficiently operate, maintain, and control under the storage system environment.

In order to solve this problem, the Republic of Korea Patent Publication No. 10-1927759 (December 05, 2018) describes the optimal solar energy generation system by using modeling, scheduling, and various prediction techniques of solar energy power generation sources and loads. The optimal control system and control method of the solar power generation system are described so that it can perform the control function of the solar power generation system and realize an economical and stable power supply system by centrally controlling and operating it.

In addition, the Republic of Korea Patent Registration No. 10-1944067 (January 24, 2019) collects demand, production, and environmental information of the thermal + electrical composite MicroGrid (hereinafter referred to as composite MG), and reorganizes and By proceeding with the analysis, a thermoelectric composite grid EMS platform is described to support the effective operation of the composite MG overall perspective.

The conventional thermoelectric composite grid EMS platform and the optimal control system of the solar energy generation system have a complicated internal structure and implement the individual requirements of the applicant, so there is a limit in general use.

Republic of Korea Registered Utility Model Publication No. 20-0369438 (November 25, 2004) Republic of Korea Patent Publication No. 10-2006-0065873 (June 14, 2006) Republic of Korea Patent Publication No. 10-1927759 (December 05, 2018) Republic of Korea Patent Registration No. 10-1944067 (January 24, 2019)

The present invention has been devised to solve the above problems, and it is a complex that enables remote control of cooling or heating by supplying electricity generated in a cogeneration unit using gas as a fuel source and efficiently managing waste heat generated in the cogeneration unit. It is intended to provide a cogeneration system remotely controlled by a grid EMS platform.

The combined heat and power generation system remotely controlled by such a complex grid EMS platform includes an engine unit 112 that generates heat while generating a driving force using gas fuel supplied from the outside, and the driving force of the engine unit 112. a cogeneration unit 110 having an electric generator 114 for generating electricity by using; After receiving electricity output from the electric generator 114 of the cogeneration unit 110 and converting it to a preset voltage, it is supplied to at least one energy facility 190, or the amount of electricity supplied from the electric generator 114 a power receiving facility unit 120 for receiving high-voltage electricity from a preset power company when it is determined to be insufficient, converting it, and then supplying it to at least one or more energy facilities 190; a waste heat supply unit 130 for supplying hot water heat-exchanged with heat generated in the engine unit 112 to at least one energy facility 190 through a circulation pipe unit 150; an absorption chiller 170 for supplying the cooling water heat-exchanged with the hot water supplied from the waste heat supply unit 130 to at least one energy facility 190; a combined heat and power system 100 including a waste heat recovery unit 140 that recovers heat circulated in the absorption chiller 170 through the circulating water pipe unit 150;

It is installed to be connected to the output terminal of the waste heat supply unit 130 of the cogeneration system 100, and from the waste heat supply unit 130 to the absorption chiller 170 or the energy facility 190 according to a user's setting or control. a cooling/heating control unit 200 for cooling or heating the temperature of the water to a preset temperature range and supplying it;

One or more power generation systems and storage systems including the combined heat and power system (CHP), photovoltaic system (PV), energy storage system (ESS), fuel cell (FC), and cooling, heat and / and electricity consumption It is connected to communicate with at least one or more energy facilities, and periodically collects the power of the power generation system and the storage system or the temperature of the cooling and heating medium according to the user's setting or control, and It is characterized in that it includes a microgrid EMS (Energy Management System) platform 300 for storing and analyzing the temperature result, and integrally controlling and managing the supply amount and temperature of the power, cooling, and heat medium according to the analysis result. .

According to the cogeneration system remotely controlled by the combined grid EMS platform according to the present invention, electricity generated in the cogeneration unit using gas as a fuel source is supplied, and at the same time, waste heat generated in the cogeneration unit is efficiently managed to provide cooling or Heating can be performed, allowing remote control of seasonal heating (hot water supply), cooling, and power supply without having to have a separate boiler in one cogeneration facility that uses the same fuel. Economical cooling and heating functions can be implemented.

1 is a block diagram of a cogeneration system remotely controlled by a combined grid EMS platform according to the present invention.
Figure 2 is a block diagram of the cogeneration system of the cogeneration system remotely controlled by the combined grid EMS platform according to the present invention.
3 is a plan view of the cooling and heating control unit of the cogeneration system of the cogeneration system remotely controlled by the combined grid EMS platform according to the present invention.
Figure 4 is a block diagram of the control unit of the cogeneration system remotely controlled by the combined grid EMS platform according to the present invention.
5 is a view for explaining the thermoelectric module of the cogeneration system remotely controlled by the combined grid EMS platform according to the present invention.
Figure 6 is a view for explaining the energy convergence management operation between the cogeneration system-ESS-specific energy facility remotely controlled by the combined grid EMS platform according to the present invention.

Detailed description of the configuration of the present invention for achieving the above-mentioned object is as follows, and detailed description of known components that may unnecessarily obscure the gist of the present invention will be omitted, and the same components in the drawings will be the same. A code is given, and a new code is assigned only to a new component for explanation.

1 is a block diagram of a cogeneration system remotely controlled by a combined grid EMS platform according to the present invention.

1, the EMS platform 300 is equipped with sensors, measurement equipment, analysis SW, etc. for each complex energy source such as power, cooling (heat), combined heat and power (CHP), solar power, ESS, and hydrogen/electric vehicle complex charging station. , remote monitoring, control and management are executed in real time in connection with the communication network, and in a preferred embodiment of the present invention, the configuration and operation between the combined heat and power system (CHP) 200 and the EMS platform 300 will be mainly described. .

2 is a block diagram of the cogeneration system of the cogeneration system remotely controlled by the combined grid EMS platform according to the present invention.

2, the cogeneration system remotely controlled by the combined grid EMS platform according to the present invention, as shown in FIGS. 1 and 2, the cogeneration system 100 and the cooling and heating control unit 200 ) and a microgrid EMS (Energy Management System) platform 300 .

Here, the cogeneration system 100 includes an engine unit 112 that generates heat while generating driving force using gas fuel supplied from the outside, and an electric generator that generates electricity using the driving force of the engine unit 112 . Cogeneration unit 110 having a (114) and; After receiving electricity generated from the electric generator 114 of the cogeneration unit 110 and converting it to a preset voltage, it is supplied to at least one energy facility 190, or the amount of electricity supplied from the electric generator 114 is preset. a power reception facility unit 120 for receiving high-voltage electricity from a preset power company and supplying it to at least one or more energy facilities 190 after conversion when it is determined that the amount of demand is insufficient; a waste heat supply unit 130 for supplying hot water heat exchanged with heat generated in the engine unit 112 to at least one energy facility 190 through the circulation pipe unit 150; an absorption chiller 170 for supplying the cooling water heat-exchanged with the hot water supplied from the waste heat supply unit 130 to at least one energy facility 190; a cooling tower 160 installed so as to be connected in parallel between the input and output terminals of the absorption chiller 170 to vaporize the water discharged from the absorption chiller 170 to lower the temperature of the water; A heat storage tank 180 that is connected to the rear end of the waste heat supply unit 130, stores heat contained in the water supplied from the waste heat supply unit 130, and supplies heat to at least one or more energy facilities according to a user's setting or control; ; It is composed of a waste heat recovery unit 140 that recovers heat circulated in the absorption chiller 170 through the circulating water pipe unit 150 .

Here, the engine unit 112 may be selectively used among a gas engine, a gas turbine engine, a fuel cell, and a micro gas turbine engine according to a power generation method and capacity.

In addition, the circulation pipe unit 150 includes a pipe 152 for supplying or recovering water according to a user's setting or control, one or more control valves 154 for selectively opening or closing a pipe path of water, and water It consists of one or more circulation pumps 156 installed on the pipe 152 to forcibly circulate the.

In addition, the cooling and heating control unit 200 is installed to be connected to the output terminal of the waste heat supply unit 130 of the cogeneration system 100, and the absorption chiller ( 170) or the energy facility 190, the temperature of the water is cooled or heated to a preset temperature range and supplied.

As shown in FIGS. 3 and 4, the cooling and heating control unit 200 has a supply port and an outlet port for supplying or discharging water to one side, and a housing body 210 having an installation space therein. ), which is installed on one side of the housing body 210, and selects power on/off, cooling mode, and heating mode according to the user's setting or control, and a control unit 220 for adjusting the cooling or heating temperature; , a thermoelectric module 230 installed inside the housing body 210 and performing heat or heat absorbing operation on the working surface according to the operation of the manipulation unit 220, and absorbing or generating heat on the reaction surface. And, the thermoelectric module 230 is installed so as to be in contact with the working surface (S1) and the reaction surface (S3) of the thermoelectric module 230, respectively, the working side that emits heat and cool air generated according to the heat generation or heat absorption operation of the thermoelectric module 230 to the outside A heat dissipation element 240 having a heat dissipation plate 240a and a reaction side heat dissipation plate 240b, installed inside the housing body 210, and the thermoelectric module 230 according to an operation command through the operation unit 220 A control unit 250 selectively controlling the operation of the control unit 250, an electric heating element 260 for heating the reaction side heat sink 240b of the heat dissipation element 240 under the control of the control unit 250, and the thermoelectric module Installed inside the heat exchanger 270 and the heat exchanger 270 for continuously performing heat exchange of the supply water through the heat sink 240a on the working side of the heat dissipation element 240 installed so as to be in contact with the working surface of the 230 . to the submersible pump P for forcibly sucking water supplied from the output end of the waste heat supply unit 130 into the inside of the heat exchanger 270 and to the thermoelectric module 230 under the control of the control unit 250 . The power supply 280 for supplying DC power or power for heating the electric heating element 260, and the temperature of the air above and below the thermoelectric module 230 and the ambient temperature of the housing 210 to the temperature sensing unit 290, which is periodically measured and transmitted to the control unit 250, respectively. is composed

Here, the thermoelectric module 230 is also expressed as a Peltier element, a thermoelectric conversion element, a semiconductor element, a Peltier element, a temperature module, and a TEC, and is a semiconductor element that allows free cooling, heating and temperature control by direct current, and a thermoelectric module By passing a direct current to (230), (1) a temperature difference is generated on both sides of the device, and (2) heat is absorbed from the low temperature side and heat is generated from the high temperature side, pushing heat from the low temperature side to the high temperature side of the thermoelectric module. That is, it acts as a heat pump, and (3) changing the direction of the pumped heat simply by changing the polarity of the current and changing the size of the current can change the size of the amount of heat pumped.

In addition, the electric heating element 260 may be selected from an electric resistance heating element, a PCT heating element, a coil heater, an input heater, a cartridge heater, a casting heater, a sheath heater, a halogen heater, an infrared heater, a fin heater, a ceramic band heater, a flange heater, etc. All heating elements using electricity are applicable.

In addition, the temperature sensing unit 290 includes a first temperature sensing sensor 291 installed on the working side heat sink 240a of the heat dissipation element 240 installed so as to be in contact with the working surface of the thermoelectric module 230, and the thermoelectric module ( The second temperature sensor 293 installed on the reaction-side heat sink 240b of the heat dissipation element 240 installed to face the reaction surface S3 of the 230, and the third temperature installed on one side of the housing body 210 Consists of a detection sensor (295).

On the other hand, the control unit 250, as shown in Fig. 4, the first to third temperature sensing sensors (291,293,295) to convert the temperature value sensed in analog signal form into a digital signal A / D converter 251 (251) And, a forward/reverse switching circuit 252 for converting the direction of the direct current applied to the thermoelectric module 230 under the control of the controller 250, and the first to third temperature sensors according to the control of the controller 250 ( 291,293,295) to control the direction of the output current of the forward/reverse switching circuit 252 to correspond to the detected temperature value, or to heat the electric heating element 260. Microprocessor 253 for controlling the operation of the power supply unit 280. is composed of

Here, when the ambient temperature of the housing 210 is zero, the microprocessor 253 of the control unit 250 controls the temperature of the reaction surface S3 of the thermoelectric module 230 to smoothly absorb heat. It is controlled to be relatively lower than the temperature by about 2-3°C, and when the ambient temperature of the housing 210 is below zero, the ambient temperature of the housing is ignored and dew condensation or condensation of water vapor on the reaction surface S3 of the thermoelectric module 230 does not occur. It is desirable to control the temperature deviation so that it does not occur.

In addition, the power supply unit 280 may use a battery provided in the housing 210 or may use a separate external power supply device.

In addition, the microgrid EMS (Energy Management System) platform 300 is one or more power generation systems including a combined heat and power system (CHP), a photovoltaic system (PV), an energy storage system (ESS), a fuel cell (FC) and The storage system is communicatively connected with at least one energy facility 190 that consumes cooling, heat and/or electricity, and the power of the power generation system and the storage system or the temperature of the cooling and heating medium according to the user's setting or control. is periodically collected, and the temperature results of the collected power or cooling and heating medium are stored and analyzed, and according to the analysis results, the supply amount and temperature of the power, cooling, and heating medium are integrated and managed.

Such a microgrid EMS platform 300, as shown in FIG. 6, a system management unit 310 that manages and operates the microgrid EMS platform 300 as a whole; An application application unit 320 for generating various predictions, statistical analysis, and scheduling including supply and load power amount prediction using data collected and stored through a plurality of independent management systems (PMS) for each function; Monitoring the central integrated control and management status performed in the microgrid EMS platform 200 through data communication executed between the microgrid EMS platform 300 and the integrated operation center (TOC), or to the operator or consumer to the microgrid EMS platform ( 300) a web service providing unit 330 for providing web services for centralized integrated control and management; Central integrated control and management generated within the microgrid EMS platform 300, including load measurement information of energy facilities, energy generation and storage information, and Internet of Things (IoT) collection information collected through multiple power management systems (PMS) It is composed of a database unit 340 for recording information as well as converting it into big data through data mining.

In a preferred embodiment of the present invention, the energy convergence and complex management operation operation between the microgrid EMS platform 300 and the energy storage system (ESS) and specific energy facilities 190 such as factories or various buildings will be mainly described.

The system management unit 310 of the microgrid EMS platform 300 is connected to communicate with a specific energy facility 190 and one or more specific energy storage systems (ESS), and convergence power control executed by the application application unit 320 . Whether the electricity generated in the cogeneration system 100 is directly supplied to the specific energy facility 190 through the algorithm, the operation of the cogeneration system 100 is stopped, and the electricity stored in the specific energy storage system (ESS) is specified. It is possible to control whether to supply to the energy facility 190 .

The convergence power control algorithm executed in the application application unit 320 checks the power usage of consumers (eg, factories) in 15-minute units at KEPCO according to the setting of a specific energy facility 190 and sets the highest power usage as a basic It operates in one of the basic rate saving mode and the total rate saving mode in consideration of the charging method calculated by the rate, and a detailed description of the operation will be described later.

Hereinafter, the operation of the cogeneration system remotely controlled by the combined grid EMS platform according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

(1) Electricity supply

First, most of the electric energy is produced through the electric generator 114 of the cogeneration unit 110 using city gas supplied from a specific gas company as a fuel source (80 to 90%), and the shortage is through commercial distribution lines. The power reception facility 120 receives power from a specific power company (10 to 20%), and the heating heat and hot water supply heat according to heating recover waste heat generated from the engine unit 112 of the cogeneration unit 110 and perform cooling, Heat exchange is supplied through the heating control unit 200, and cooling heat according to cooling can be supplied by exchanging heat with water supplied from the cogeneration unit 110 using the absorption chiller 170, so that the energy facility 900 is supplied with electricity. In addition to supply, it is possible to meet the energy demand according to the simultaneous implementation of heating and cooling, or the load according to the season and the demand source.

To this end, the system management unit 310 of the microgrid EMS platform 300 periodically communicates with the power receiving facility 120, and periodically from the power receiving facility 120, various predictions, including wattage prediction, and usage analysis results Since it is transmitted to the web service providing unit 330, the system management unit 310 of the microgrid EMS platform 300 determines that the amount of electricity produced through the electric generator 114 of the cogeneration unit 110 is insufficient, commercial Scheduling can be controlled to supply power from a specific power company that is supplied to the power receiving facility 120 through a distribution line.

(2) Heating or hot water supply

The engine unit 112 of the cogeneration system 100 of the present invention generates shaft power by using city gas as a fuel source, and the waste heat supply unit 130 generates high-temperature and high-pressure combustion gas (waste heat or exhaust heat) generated during the power generation process. ) to heat water to about 70 to 90° C. and supply it through a preset circulation path along the pipe 125 of the circulating water pipe unit 150. As shown in FIG. 2, it branches through the control valve. It is possible to supply hot water to the energy facilities 190 such as bath facilities or to supply hot water required for heating.

At this time, the cooling/heating control unit 200 heats the water temperature to a preset temperature range from the waste heat supply unit 130 to the absorption chiller 170 or the energy facility 190 according to the user's setting or control. It can be supplied, which is described in detail as follows.

The microprocessor 253 of the control unit 250 controls the forward/reverse switching circuit 252 to determine the direction of the current entering the thermoelectric module 230 from the power supply 280. The working surface S1 of the thermoelectric module 230 is the upper side. A direct current of a preset direction (+ or - direction) is applied to the thermoelectric module 230 to be directed in the direction.

In this case, the controller 250 may adjust the intensity of the preset heating mode by adjusting the intensity of the voltage and current applied to the thermoelectric module 230 to correspond to the intensity of the heating mode operated by the manager.

Accordingly, the working surface S1 of the thermoelectric module 230 emits heat while the reaction surface S3 of the thermoelectric module 230 absorbs heat. Water that has undergone heat exchange passing in the transverse direction through the upper heat sink 240a of the heat dissipation element 240 installed on the working surface S1 may be heated and discharged.

On the other hand, when the microprocessor 253 of the control unit 250 executes heating, the first temperature sensor 291 installed on the upper heat sink 240a surrounding the working surface S1 of the thermoelectric module 230 and the thermoelectric The temperature sensing value detected by the second temperature sensor 293 installed on the lower heat sink 240b surrounding the reaction surface S3 of the module 230 or the lower heat sink surrounding the reaction surface S3 of the thermoelectric module 230 ( 240b) each periodically receives the temperature sensing values of the second temperature sensing sensor 293 and the third temperature sensing sensor 295 installed on the outer surface of the housing 210, so that the difference between the two temperature values is a preset temperature range If it does not exceed, it is determined that the heat absorption function of the lower heat sink 240b of the heat dissipation element 240 is in a normal state and the electric heating element 260 is not operated, but the difference between the two temperature values exceeds the preset temperature range. In this case, it is determined that the heat absorbing function of the lower heat sink 240b of the heat dissipation element 240 is not normal, such as a situation in which condensation occurs or water vapor is condensed, and the electric heating element 260 is controlled to operate.

That is, the control unit 250 controls the temperature of the lower heat sink 240b of the heat dissipation element 135 of the working surface S1 of the thermoelectric module 230 to smoothly absorb heat when the outside temperature is zero. The lower heat sink of the heat dissipation element 240 mounted on the reaction surface (S1) side of the thermoelectric module 230, ignoring the outside temperature when the outside temperature is below zero, and controlling it to be relatively lower than the outside temperature by about 2 to 3 ° C. It is preferable to operate to control the temperature so that condensation or condensation of water vapor does not occur in 240b).

(3) Air conditioning supply

The engine unit 112 of the cogeneration system 100 of the present invention generates shaft power by using city gas as a fuel source, and the waste heat supply unit 130 generates high-temperature and high-pressure combustion gas (waste heat or exhaust heat) generated during the power generation process. ) to heat water to about 70 to 90° C. and supply it through a preset circulation path along the pipe 125 of the circulating water piping unit 150. As shown in FIG. 2, hot water over a certain temperature is supplied. Water required for cooling through heat exchange in the absorption chiller 170 may be supplied to the energy facility 190 such as an air conditioner.

At this time, the water discharged from the waste heat supply unit 130 may be directly supplied to the absorption chiller 170 along the pipe 125 of the circulating water pipe unit 150, and if necessary, the cooling and heating control unit 200. It can be supplied to the energy facility 190 immediately after heat exchange in the .

Specifically, the microprocessor 253 of the controller 250 controls the forward/reverse switching circuit 252 to change the direction of the current entering the thermoelectric module 230 from the power supply 280 by the reaction of the thermoelectric module 230 . A direct current in a preset direction (+ or - direction) is applied to the thermoelectric module 230 so that the surface S1 faces upward.

In this case, the controller 250 may adjust the intensity of the preset heating mode by adjusting the intensity of the voltage and current applied to the thermoelectric module 230 to correspond to the intensity of the cooling operation operated by the manager.

Accordingly, the reaction surface S3 of the thermoelectric module 230 radiates heat while the action surface S1 of the thermoelectric module 230 absorbs heat. The heat exchanged water installed on the working surface S1 can be cooled.

On the other hand, in a preferred embodiment of the present invention, when the system management unit 310 of the microgrid EMS platform 300 is connected to communicate with a specific energy facility 190 and one or more specific energy storage systems (ESS), the application application unit Whether to directly supply electricity generated in the cogeneration system 100 to a specific energy facility 190 through the convergence power control algorithm executed in 320, stop the operation of the cogeneration system 100, and store specific energy It is possible to control whether electricity stored in the system ESS is supplied to a specific energy facility 190 .

The convergence power control algorithm executed in the application application unit 320 checks the power usage of consumers (eg, factories) in 15-minute units at KEPCO according to the setting of a specific energy facility 190 and sets the highest power usage as a basic It operates in one of the basic rate saving mode and the total rate saving mode in consideration of the charging method calculated by the rate, and a detailed description of the operation will be described later.

First, when the basic rate reduction mode is set according to the request of the specific energy facility 190, the system management unit 310 performs real-time communication with the corresponding cogeneration system 100 for each preset unit time period (10 second units). The electricity usage data is sampled and stored in the database unit 340, the intermediate cumulative average value for each preset control time interval (1 minute) is calculated and stored in the database unit 340, and the accumulated average value for each 15-minute interval is calculated and stored in the database stored in unit 340 .

In this case, the system management unit 310 performs a preset control while comparing the intermediate cumulative average value calculated in advance while communicating with the corresponding energy storage system (ESS) in real time with the maximum demand power set by the operator of the corresponding energy facility 190 with each other. It is controlled to discharge the electric energy stored in the corresponding energy storage system (ESS) to the corresponding energy facility 190 in units of a time period (1 minute).

However, the system management unit 310 may not output the control signal to the corresponding energy storage system (ESS) for each preset control time interval, and may output the control signal in consideration of various situations.

For example, if the current accumulated average value within the 15-minute period has a relatively greater value than the maximum output power value of the voltage converter provided in the corresponding energy storage system (ESS) is greater than the preset maximum demand power value, the system management unit 310 is The control signal may not be output to the corresponding energy storage system (ESS) even in the corresponding cycle.

In addition, if the system management unit 310 determines that there is a possibility that reverse power is generated due to the energy storage system (ESS) supplying electrical energy to the corresponding energy facility 190, output the electrical energy so as not to exceed a preset reverse power limit value. This can be readjusted.

On the other hand, when the used power of the energy facility 190 exceeds the preset demand power despite the control operation described above, the system management unit 310 controls ON/OFF with a server provided in the corresponding energy facility 190 . pass the command

In order to execute this, the system management unit 310 performs real-time communication with the cogeneration system 100 in order to manage the accumulated usage in units of 15 minutes through the application application unit 320, and a preset unit time period (10 second units) The electricity usage data is sampled for each and stored in the database unit 340 , and an intermediate accumulated average value for each preset control time period (1 minute) is calculated and stored in the database unit 340 .

Next, the system management unit 310 determines the ON/OFF control mode based on the calculated usage for 1 minute, in the OFF mode, the preset target usage + OFF section value is greater than the previous maximum demand or the usage for the previous minute is preset. On the other hand, the ON mode operates when the preset target usage-ON section value is relatively smaller than the previous maximum demand value, whereas it operates when it becomes larger than the slope coefficient value.

For example, in the ON/OFF mode, the operation may be controlled according to a preset driving priority of the device (eg, air conditioner>lighting>blower>refrigerator>compressor>emergency generator, etc.).

On the other hand, when operating in the total rate saving mode according to the setting or request of the specific energy facility 190 , a specific date or day of the week and the operation time must be set in the corresponding energy facility 190 .

The system management unit 310 can selectively perform the operation of discharging the electrical energy stored in the corresponding energy facility 190 or charging the external electrical energy of the corresponding energy storage system (ESS) according to the operating conditions of the total charge saving mode set in this way. have.

In such a total rate reduction mode, the energy facility 190 shows power consumption that is not suitable for applying the basic rate reduction mode described above, or is used according to a schedule set according to the schedule of the corresponding energy facility 190 . You can use it when you want to.

For example, by charging the energy storage system (ESS) during a light load period when the electricity rate is low, and discharging the energy storage system (ESS) during a medium load or maximum load period when the electricity rate is relatively high, the corresponding energy facility ( 190) to save electricity bills.

According to the preferred embodiment of the present invention described above, by performing gas and cogeneration power generation using gas as a fuel source, peak electricity demand in summer can be converted into gas demand, so seasonal demand management is possible. , It is characterized in that it is implemented in a complex manner by linking the cooling operation centered on the heating control unit, the concomitant saving-type hot water supply, and the waste heat recovery type heating in the spring and winter seasons.

The embodiments of the present invention disclosed in the above-described specification and drawings are merely presented as specific examples to aid understanding, and are not intended to limit the scope of the present invention. It will be apparent to those of ordinary skill in the art to which the present invention pertains that other modifications based on the technical spirit of the present invention can be implemented in addition to the embodiments disclosed herein.

100: cogeneration system 112: engine unit
114: electric generator 110: cogeneration unit
120: power receiving equipment 130: waste heat supply unit
140: waste heat recovery unit 150: circulating water piping unit
152: water pipe 154: control valve
154: circulation pump 160: cooling tower
170: absorption chiller 180: heat storage tank
190: energy equipment
200: cooling, heating control unit 210: housing
220: control unit 230: thermoelectric module
240: heat dissipation element 250: control unit
260: electric heating element 270: heat exchanger
280: power supply 290: temperature sensing unit
300: EMS (Energy Management System) platform
310: system management unit 320: application application unit
330: web service providing unit 340: database unit

Claims (5)

A cogeneration unit including an engine unit 112 that generates heat while generating driving force using gas fuel supplied from the outside, and an electric generator 114 that generates electricity using the driving force of the engine unit 112 . (110) and; After receiving electricity generated from the electric generator 114 of the cogeneration unit 110 and converting it to a preset voltage, it is supplied to at least one or more energy facilities 190, or the amount of electricity supplied from the electric generator 114 a power reception facility unit 120 for receiving high-voltage electricity from a preset power company and supplying it to at least one energy facility 190 after it is converted when it is determined that the amount of demand is insufficient compared to the preset predicted demand; a waste heat supply unit 130 for supplying hot water heat-exchanged with heat generated in the engine unit 112 to at least one energy facility 190 through a circulation pipe unit 150; an absorption chiller 170 for supplying the cooling water heat-exchanged with the hot water supplied from the waste heat supply unit 130 to at least one energy facility 190; a combined heat and power system 100 including a waste heat recovery unit 140 that recovers heat circulated in the absorption chiller 170 through the circulating water pipe unit 150;
It is installed to be connected to the output terminal of the waste heat supply unit 130 of the cogeneration system 100, and from the waste heat supply unit 130 to the absorption chiller 170 or the energy facility 190 according to a user's setting or control. a cooling/heating control unit 200 for cooling or heating the temperature of the water to a preset temperature range and supplying it;
One or more power generation systems and storage systems including the combined heat and power system (CHP), photovoltaic system (PV), energy storage system (ESS), fuel cell (FC), and cooling, heat and / and electricity consumption It is connected to communicate with at least one or more energy facilities, and periodically collects the power of the power generation system and the storage system or the temperature of the cooling and heating medium according to the user's setting or control, and A microgrid EMS (Energy Management System) platform 300 for storing and analyzing the temperature result, and integrally controlling and managing the supply amount and temperature of the power, cooling, and heat medium according to the analysis result, characterized in that it comprises a platform 300 A cogeneration system remotely controlled by a combined grid EMS platform.
The method of claim 1,
The cogeneration system 100,
a cooling tower 160 installed to be connected in parallel between the input terminal and the output terminal of the absorption chiller 170 to vaporize the water discharged from the absorption chiller 170 to lower the temperature of the water;
A heat storage tank 180 connected to the rear end of the waste heat supply unit 130 to store heat contained in the water supplied from the waste heat supply unit 130 and supply heat to at least one energy facility according to a user's setting or control. ) Remotely controlled cogeneration system by the combined grid EMS platform, characterized in that it further comprises.
According to claim 1,
The cooling and heating control unit 200,
a housing body 210 having a supply port and an outlet port for supplying or discharging water to one side and having an installation space therein;
an operation unit 220 installed on one side of the housing body 210 and configured to select a power on/off, a cooling mode, a heating mode, and adjust a cooling or heating temperature according to a user's setting or control;
A thermoelectric module 230 installed inside the housing body 210 and performing heat generation or heat absorbing operation on the working surface according to the operation of the operation unit 220 and performing heat absorbing or heat generating operation on the reaction surface; ;
A working-side heat sink that is installed to face the working surface (S1) and the reaction surface (S3) of the thermoelectric module 230, respectively, and discharges heat and cool air generated according to the heat generation or heat absorption operation of the thermoelectric module 230 to the outside. a heat dissipation element 240 having (240a) and a reaction-side heat dissipation plate (240b);
a control unit 250 installed inside the housing body 210 and selectively controlling the operation of the thermoelectric module 230 according to an operation command through the operation unit 220;
an electric heating element 260 for heating the reaction-side heat sink 240b of the heat dissipation element 240 under the control of the control unit 250;
a heat exchanger 270 for continuously exchanging heat with the supplied water through the working-side heat sink 240a of the heat dissipation element 240 installed to face the working surface of the thermoelectric module 230;
a submersible pump (P) installed inside the heat exchanger (270) and forcibly sucking water supplied from an output end of the waste heat supply unit (130) into the inside of the heat exchanger (270);
a power supply unit 280 for supplying DC power to the thermoelectric module 230 or for heating the electric heating element 260 under the control of the control unit 250;
The first temperature sensor 291 installed on the working side heat sink 240a of the heat dissipation element 240 installed so as to be in contact with the working surface of the thermoelectric module 230, and the reaction surface S3 of the thermoelectric module 230 A second temperature sensor 293 installed on the reaction side heat sink 240b of the heat dissipation element 240 installed to be interviewed, and a third temperature sensor 295 installed on one side of the housing body 210. Temperature sensing A cogeneration system remotely controlled by a combined grid EMS platform, comprising a unit (290).
4. The method of claim 3,
The control unit 250,
an A/D converter 251 for converting the temperature value sensed in analog signal form into a digital signal by the first to third temperature sensors (291,293,295);
a forward/reverse switching circuit 252 for converting the direction of the current applied to the thermoelectric module 230;
Control the direction of the output current of the forward/reverse switching circuit 252 according to the temperature values detected by the first to third temperature sensors 291,293,295 according to the temperature value set in the operation unit 220, or the electric heating element ( Controlling the power supply 290 to heat 260, or controlling the operation of the submersible pump (P) Remotely controlled by a composite grid EMS platform, characterized in that it comprises a microprocessor (253) combined heat and power system.
The method of claim 1,
The microgrid EMS platform 300,
a system management unit 310 that manages and operates the microgrid EMS platform 300 as a whole;
It consists of an application application unit 320 for generating various predictions, statistical analysis, and scheduling including supply and load power amount prediction using data collected and stored through a plurality of independent power management systems (PMS) for each function;
The system management unit 310 of the microgrid EMS platform 300 is connected to communicate with a specific energy facility 190 and one or more specific energy storage systems (ESS), and is a convergence system executed in the application application unit 320 . Whether electricity generated in the cogeneration system 100 is directly supplied to a specific energy facility 190 through a power control algorithm, the operation of the cogeneration system 100 is stopped, and power is stored in a specific energy storage system (ESS) A cogeneration system remotely controlled by a combined grid EMS platform, characterized in that it controls whether to supply electricity to the specific energy facility (190).

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