KR102210605B1 - District heating system control method for frequency control of electric power system - Google Patents

Abstract

The collective energy system control method for power system frequency control according to the present invention includes the steps of detecting power system information of the power system, and controlling the amount of heat produced by the heat generating device disposed in the collective energy system based on the power system information. And controlling the heat produced by the heat production device to be supplied to a load of the collective energy system or a combined heat and power generator. Through this, the present invention provides an effect of minimizing the frequency change of the power system due to the constraint conditions of the power system and the variable power supply, solving the power supply and demand imbalance problem of the power system, and securing the reserve power of the power system.

Description

Collective energy system control method for power system frequency control {DISTRICT HEATING SYSTEM CONTROL METHOD FOR FREQUENCY CONTROL OF ELECTRIC POWER SYSTEM}

The present invention relates to a collective energy system control method for power system frequency control.

The power system must keep the grid frequency constant and minimize the power supply and demand imbalance so that power can be stably supplied. In addition, the power system must properly secure the reserve power required for the power system, and it is necessary to operate the power system at all times and continuously stably in consideration of the constraints of the power system such as transient stability and voltage stability. Generators connected to these power systems have constraints such as increase/deceleration speed, minimum starting time and stopping time of the generator.

The existing power system has a difficulty in distributing output to generators in the order of generation cost in order to meet the constraints of the generator. In addition, in order to stably operate the power system by satisfying the constraints of the power system or to secure the reserve power required for the system, the existing power system must drive generators with high power generation costs while reducing the output of generators with low power generation costs. There are difficulties.

And, recently, the proportion of renewable energy sources has been steadily increasing worldwide due to the depletion of fossil fuels and energy shortages. However, since variable power sources such as renewable energy sources are composed of energy sources whose output of the generator is determined according to climate and weather, it is difficult to control the output of the power generation sources, and an imbalance in power supply and demand is caused by the momentary output fluctuations. do.

In addition, the power generation characteristic of the variable power source is different from that of the conventional generator, causing the system's inertial energy and response resources to be reduced. Since such a volatile power source is not synchronized with the power system, it replaces the existing power generation source and reduces the inertia of the system when it is put into the system. Therefore, the frequency change due to the power supply and demand imbalance appears even more in the system.

Due to the characteristics of the power system, the problem caused by the fluctuation in the output of the volatile power supply will appear even greater, and therefore, a measure for the stability of power supply and demand in the future power system is urgently needed.

The matters described in this background are prepared to enhance an understanding of the background of the invention, and may include matters not known in the prior art to those of ordinary skill in the field to which this technology belongs.

The present invention is a group for power system frequency control that can minimize the frequency change of the power system due to the constraints of the power system and variable power, solve the power supply and demand imbalance problem of the power system, and secure the reserve power required for the power system I would like to propose an energy system control method.

The collective energy system control method for power system frequency control of the present invention includes the steps of detecting power system information of the power system, controlling the amount of heat produced by the heat generating device disposed in the collective energy system based on the power system information, And controlling the heat produced by the heat production device to be supplied to a load of the collective energy system or a combined heat and power generator.

The power system information includes information on a ramp rate characteristic of a generator, frequency information of the power system, power supply and demand information of the power system, information on a net load by a variable power source, information on a response amount by the variable power source, the It may include at least one of output fluctuation information of a renewable energy source connected to the power system, information on a reserve amount of the power system, or output information of a generator connected to the power system.

It may further include controlling to provide the heat produced by the heat generating device to the combined heat and power generator so as to improve the power generation efficiency or ramp rate characteristic of the combined heat and power generator disposed in the collective energy system.

It may further include storing the heat produced by the heat production device in a heat storage device, and supplying the heat stored in the heat storage device to a load of the collective energy system.

It may further include supplying the heat stored in the heat storage device to a cogeneration generator disposed in the collective energy system.

Converting, by a heat conversion device disposed in the collective energy system, low-temperature water into hot water by using power over-produced in the power system or surplus power expected to be over-produced in the power system based on the power system information, And it may further include the step of supplying the high-temperature water to the load of the collective energy system.

It may further include the step of supplying the high-temperature water converted by the heat conversion device to the cogeneration generator disposed in the collective energy system.

Sensing the system frequency of the power system, when the system frequency of the power system increases, increasing the heat production amount of the heat production device, and when the system frequency decreases, the heat production amount of the heat production device It may further include controlling to reduce or stop the heat production of the heat production device.

Sensing the power supply and demand information of the power system, if the power supply of the power system is greater than the power demand, increasing the heat production amount of the heat generating device, and the power supply from the power system is less than the power demand When the increase rate of power demand in the power system is greater than the set value, the step of controlling to reduce the heat production amount of the heat generating device or stop the heat production may be further included.

Receiving the command signal of the power system or the command signal of the collective energy system, the step of controlling the heat production amount of the heat generating device by the command signal of the power system or the command signal of the collective energy system. have.

Detecting a fluctuation in the output of the volatile power source linked to the power system, and comparing the net load amount due to the fluctuation in the output of the volatile power source with the net load amount set value, and adjusting the heat production amount of the heat generating device based on the comparison result It may further include a step.

Detecting fluctuations in the output of the volatile power source linked to the power system, and adjusting the amount of heat produced by the heat generating device based on the response amount or response speed of the generators connected to the power system to respond to the fluctuation in the output of the volatile power source It may further include the step of.

Detecting a fluctuation in the output of a renewable energy source linked to the power system, predicting a fluctuation in the grid frequency of the power system according to the fluctuation in the output of the renewable energy source, and the heat so that the grid frequency maintains a predetermined range. It may further comprise the step of adjusting the heat production amount of the production device.

Receiving the reserve power amount information of the power system, and comparing the reserve power amount of the power system with a reserve power set value, and controlling the operation of the heat generating means to secure the reserve power amount of the power system. I can.

Acquiring output information of the generator linked to the power system, allocating a part of the power generated by the generator to the heat generating device, and the amount of heat produced by the heat generating device in response to changes in the power system information It may further include the step of controlling.

The generator connected to the power system may include a generator that cannot perform a frequency following operation in the power system or a frequency response speed is less than a set value.

It may further include the step of supplying the power generated by the cogeneration generator arranged in the collective energy system to the power system based on the power system information or the collective energy system information.

According to the present invention, the energy conversion device disposed in the collective energy system constantly consumes the power of the power system based on the power system information, so that the output of the generators connected to the power system can be distributed in the order of generation cost, and the power system It secures the reserve power of the power system and provides an environment to stably maintain the system frequency of the power system.

In addition, the present invention constantly consumes the power of the power system through the energy conversion device, and adjusts the power consumption amount of the energy conversion device based on the frequency information and power supply and demand information of the power system. And provide an environment that can minimize changes in the grid frequency of the power system.

In addition, the present invention is to improve the power generation efficiency and ramp rate characteristics of the cogeneration generator by controlling the heat energy produced by the energy conversion device to be supplied to the cogeneration generator, and to prevent a sudden change in the system frequency of the power system due to fluctuations in the output of variable power. Provide an environment that can be used.

In addition, the present invention improves the power generation efficiency and ramp rate characteristics of the generators, thereby providing an environment in which the generators can produce power according to the demand curve of the power load even when the output of the variable power source decreases or the power load increases rapidly.

In addition, the present invention is capable of stably maintaining the power supply and demand of the power system and stably maintaining the frequency of the power system by controlling the power consumption of the energy conversion device arranged in the collective energy system based on the system frequency of the power system. Provide the environment.

In addition, the present invention predicts the power supply and demand imbalance of the power system by analyzing the power supply and demand information of the power system, and compares the power supply and power demand of the power system based on the prediction result, or sets the increase rate of power demand in the power system. By controlling the power consumption of the energy conversion device arranged in the collective energy system compared to, it solves the problem of unbalanced power supply and demand in the power system, thereby providing an environment that can prevent the deterioration of the stability of the power system.

In addition, the present invention minimizes the frequency change of the power system and solves the power supply and demand imbalance problem by controlling the power consumption of the energy conversion device disposed in the collective energy system by considering the information of the power system and the collective energy system information in combination. Provide an environment that can be used.

In addition, the present invention comprehensively considers the economics of the power system and the collective energy system based on the instruction signal of the power system and the collective energy system, and adjusts the power consumption of the energy conversion device disposed in the collective energy system. In addition, it provides an environment that can reduce energy costs across the country.

In addition, the present invention controls the power consumption of the energy conversion device disposed in the collective energy system based on the net load information of the power system due to the change in the output of the variable power connected to the power system. It solves the imbalance problem and provides an environment in which the frequency of the power system can be stably maintained.

In addition, the present invention controls the power consumption amount of the energy conversion device disposed in the collective energy system based on information on the amount of response of the power system due to fluctuations in the output of the volatile power source linked to the power system. It solves the problem of power supply and demand imbalance and provides an environment to stably maintain the frequency of the power system.

In addition, the present invention controls the power consumption of the energy conversion device arranged in the collective energy system based on the output fluctuation of the renewable energy source linked to the power system, It minimizes the frequency change and prevents the frequency change of the power system, thereby providing an environment in which the frequency of the power system can be stably maintained.

In addition, the present invention controls the power consumption of the energy conversion device disposed in the collective energy system based on the output fluctuation of the renewable energy source, as a result, the output of the renewable energy source is flattened to provide the same effect to the power system. It provides an environment that can provide

In addition, the present invention can secure the reserve power of the power system and stably maintain the power supply and demand of the power system by adjusting the power consumption of the energy conversion device disposed in the collective energy system based on the reserve power amount information of the power system. Provide an environment that is there.

In addition, the present invention, when the energy conversion device disposed in the collective energy system consumes part of the power produced by the base generator, by controlling the power consumption of the energy conversion device disposed in the collective energy system based on the power system information, It provides an environment in which frequency instability of the power system can be eliminated by enabling the output control of a generator that cannot perform a frequency following operation in the power system or a low frequency response speed.

In addition, the present invention contributes to the power system in the form of increasing or decreasing the load of the power system by controlling the power consumption of the energy conversion device disposed in the collective energy system, thus controlling the power supply and demand of the power system, and Unlike a generator, it provides an environment that can continuously provide the reserve power required for the power system.

1 is a diagram schematically showing a collective energy system for controlling a power system frequency according to an embodiment of the present invention.
2 is a schematic diagram illustrating a heat transport line of a heat production device and a heat transport line of a heat storage device according to an embodiment of the present invention.
3 is a diagram schematically illustrating a heat transport line of a heat exchange device and a heat transport line of a heat storage device according to another embodiment of the present invention.
4 is a block diagram showing a schematic configuration of a control device according to an embodiment of the present invention.
5 is a diagram illustrating an example in which a control device receives power from a power system and controls the operation of a collective energy system according to an embodiment of the present invention.
6 is a flowchart briefly showing a process of controlling the operation of the collective energy system according to the first embodiment of the present invention.
7 is a flowchart schematically illustrating a process of controlling the operation of a collective energy system using information on a ramp rate characteristic of a generator according to a second embodiment of the present invention.
8 is a flowchart briefly showing a process of controlling the operation of the collective energy system using the grid frequency of the power system according to the third embodiment of the present invention.
9 is a flowchart schematically illustrating a process of controlling the operation of the collective energy system using power supply and demand information of the power system according to the fourth embodiment of the present invention.
10 is a flowchart schematically showing a process of controlling the operation of the collective energy system based on the indication signals of the power system and the collective energy system according to the fifth embodiment of the present invention.
11 is a flowchart schematically illustrating a process of controlling the operation of the collective energy system using information on the net load of the power system according to the sixth embodiment of the present invention.
12 is a graph showing a general daily power demand curve in the power system.
13 is a graph showing a change in net load due to an increase in output of a variable power supply.
14 is a flowchart schematically illustrating a process of controlling the operation of the collective energy system using information on the amount of response of the power system according to the seventh embodiment of the present invention.
15 is a flowchart briefly illustrating a process of controlling the operation of the collective energy system using information on the reserve power of the power system according to the eighth embodiment of the present invention.
16 is a flowchart briefly showing a process of controlling the operation of the collective energy system so that a part of the power produced by the base generator according to the ninth embodiment of the present invention responds to a change in the system frequency.
17 is a graph showing an example of determining the priority and output distribution of generators in the order of generation cost.
18 is a graph showing an example of determining the priority and output distribution of generators by reflecting the constraints of the generator.
19 is a graph showing an example of determining the priority and output distribution of generators to secure the minimum reserve power.
20 is a graph showing an example of determining the priority and output distribution of generators by reflecting the constraints of the power system.
21 is a graph showing the priority and output distribution of generators when controlling the heat production of the collective energy system according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement the embodiments of the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are assigned to similar parts throughout the specification.

Throughout the specification, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components unless otherwise stated. In addition, terms such as "... unit", "... group", and "module" described in the specification mean units that process at least one function or operation, which can be implemented by hardware or software or a combination of hardware and software. have.

Here, the power system includes electrical facilities that are physically interconnected to supply electricity generated by the power plant to electric users, that is, power generation facilities, transmission and distribution facilities, distribution facilities, and other auxiliary facilities.

In addition, the collective energy system provides multiple energies (eg, heat and electricity) produced in energy production facilities such as cogeneration plants, heat-only boilers, heat storage and resource recovery facilities to multiple users in residential, commercial or industrial complexes. It includes the supplying system. For example, the collective energy system includes at least one of a heat system, a cogeneration system, a heat production system, a heat storage system, a heat exchange system, a heat supply system, a district heating system, or a district cooling system.

Now, a collective energy system and a collective energy system control method for controlling a power system frequency according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 21.

1 is a diagram schematically showing a collective energy system for controlling a power system frequency according to an embodiment of the present invention. At this time, the collective energy system 100 for power system frequency control only shows a schematic configuration necessary for explanation according to an embodiment of the present invention, but is not limited to this configuration.

1, the collective energy system 100 for power system frequency control according to an embodiment of the present invention is based on the power system information or collective energy system information, the power between the power system 10 and the collective energy system. Control consumption and power supply. Here, the power consumption is an amount of power supplied from the power system 10 to the collective energy system, and includes the amount of power produced by the power system 10 that is supplied to and consumed by the collective energy system. In addition, the power supply amount is the amount of power supplied from the collective energy system to the power system 10, and includes the amount of power produced by the collective energy system supplied to the power system 10.

The power system 10 may include a base generator 12, a frequency responsive generator 14, a variable power supply 16, and a power system load 18. The base generator 12 includes a generator that cannot perform a frequency following operation in the power system 10 or has a frequency response speed less than a set value.

Further, the frequency responsive generator 14 includes a generator having a frequency responsiveness speed greater than or equal to a set value while performing a frequency following operation in the power system 10. In addition, the variable power supply 16 includes a power source whose power generation is determined by an external factor or whose amount of power is increased or decreased.

In addition, the collective energy system 100 for controlling the frequency of the power system according to an embodiment of the present invention includes a heat production device 102, a heat storage device 104, a heat exchange device 106, a cogeneration generator 108, And it includes a control device (110).

Here, the heat production device 102, the heat storage device 104, and the heat exchange device 106 are energy conversion devices that convert electrical energy into heat energy and supply it to the collective energy system. For example, the heat production device 102 includes a boiler or an electric heater, the heat storage device 104 includes a heat storage tank, and the like, and the heat exchange device 106 may include a heat pump, etc. The configuration of is not limited thereto.

The heat production device 102 may produce heat energy from electric energy, and may supply the generated heat energy to the load 20 of the collective energy system or to the combined heat and power generator 108.

The heat storage device 104 temporarily stores thermal energy generated by the heat production device 102. Then, the heat storage device 104 supplies the stored heat energy to the load 20 of the collective energy system or to the cogeneration generator 108.

The heat exchanger 106 converts low-temperature water into high-temperature water based on the power system information, and supplies the converted high-temperature water to the load 20 of the collective energy system. In addition, the heat exchange device 106 may supply the high-temperature water to the combined heat and power generator 108.

The cogeneration generator 108 produces electric energy or thermal energy, and supplies the produced electric energy to the load 18 of the power system or to the load 20 of the collective energy system.

The control device 110 includes a heat production device 102, a heat storage device 104, a heat exchange device 106, and a cogeneration generator 108 disposed in the collective energy system based on the information on the power system and the collective energy system. Control the operation of In addition, the control device 110 controls the power generated by the cogeneration generator 108 to be supplied to the power system 10.

The control device 110 controls to provide the heat produced by the heat production device 102 to the cogeneration generator 108 so as to improve the power generation efficiency or ramp rate characteristics of the cogeneration generator 108.

In addition, the control device 110 may control to provide the heat stored in the heat storage device 104 to the cogeneration generator 108 so as to improve power generation efficiency or ramp rate characteristics of the cogeneration generator 108.

2 is a schematic diagram illustrating a heat transport line of a heat production device and a heat transport line of a heat storage device according to an embodiment of the present invention.

Referring to Figure 2, the collective energy system 100 is a first heat transport line 102a supplying the heat energy produced by the heat production device 102 to the cogeneration generator 108, the heat production device 102 A second heat transport line 102b that supplies heat energy to the load 20 of the collective energy system, and a first heat storage line 102c that supplies heat energy produced by the heat production device 102 to the heat storage device 104 ).

In addition, the collective energy system 100 includes a third heat transport line 104a supplying the heat energy stored in the heat storage device 104 to the cogeneration generator 108, and the heat energy stored in the heat storage device 104 in the collective energy system. And a fourth heat transport line 104b that supplies the load 20 of the.

That is, the control device 110 controls to provide the thermal energy produced by the heat production device 102 to the cogeneration generator 108 through the first heat transport line 102a based on the power system information and the collective energy system information. , It provides an environment in which the power generation efficiency or ramp rate characteristics of the cogeneration generator 108 can be improved.

In addition, the control device 110 controls to provide the thermal energy stored in the heat storage device 104 to the cogeneration generator 108 through the third heat transport line 104a based on the power system information and the collective energy system information, It provides an environment in which the power generation efficiency or ramp rate characteristics of the cogeneration generator 108 can be improved.

3 is a diagram schematically illustrating a heat transport line of a heat exchange device and a heat transport line of a heat storage device according to another embodiment of the present invention.

Referring to FIG. 3, the collective energy system 100 includes a fifth heat transport line 106a supplying the high-temperature water converted by the heat exchange device 106 to the cogeneration generator 108, and the high-temperature water in the collective energy system. And a sixth heat transport line 106b supplying the load 20 of the unit, and a second heat storage line 106c supplying the hot water to the heat storage device 104.

That is, the control device 110 controls to provide the high-temperature water converted in the heat exchange device 106 to the cogeneration generator 108 through the fifth heat transport line 106a based on the power system information and the collective energy system information. By doing so, it provides an environment in which the power generation efficiency or ramp rate characteristics of the combined heat and power generator 108 can be improved.

4 is a block diagram showing a schematic configuration of a control device according to an embodiment of the present invention, and FIG. 5 is a block diagram showing the operation of the collective energy system by receiving power from the power system according to an embodiment of the present invention. It is a figure showing an example of controlling. At this time, the control device 110 only shows a schematic configuration necessary for description according to an embodiment of the present invention, but is not limited to this configuration.

Referring to FIGS. 4 and 5, the control device 110 supplies power generated from the power system to an energy conversion device disposed in the collective energy system, and controls the energy conversion device to constantly consume the supplied power. In addition, the control device 110 analyzes power system information and collective energy system information, and controls the power consumption amount of the energy conversion device to be adjusted based on the analysis result.

The control device 110 includes a power system information receiving unit 112, a collective energy system information receiving unit 114, and a control unit 116 according to an embodiment of the present invention.

The power system information receiving unit 112 receives power system information or power system analysis information from the power system 10 or analyzes the power system information to generate power system analysis information.

And, the power system information and the power system analysis information is ramp rate characteristic information of the generators 12 and 14 connected to the power system 10, frequency information of the power system 10, and the power system 10 Includes information on power supply and demand. In addition, the power system information and power system analysis information include net load information by the variable power source 16, information on the amount of response by the variable power source 16, information on the variation of new and renewable outputs linked to the power system 10, and the power system ( 10), and information on the output of the base generator 12 linked to the power system 10, and the like. Here, the ramp rate characteristic information is a fluctuation of the generator output per minute, and includes the evaporation rate of the generator, the deceleration rate of the generator, or the speed adjustment rate of the generator.

For example, the power system information receiving unit 112 receives frequency information of the power system 10 or power supply and demand information of the power system 10 from the power system 10, analyzes the received information, and the control unit 116 To provide.

The collective energy system information receiving unit 114 generates collective energy system analysis information by collecting collective energy system information or analyzing collective energy system information. Here, the collective energy system information and the collective energy system analysis information include information on the characteristics of the ramp rate of the cogeneration generator 108 arranged in the collective energy system, information on the heat supply and demand of the collective energy system, the usable capacity of the heat storage tank, and information on predicting heat demand. , Current heat production information, current heat consumption information, and electricity supply and demand information of the collective energy system.

In addition, the heat supply and demand information includes heat production information of the heat production device 102, heat storage information of the heat storage device 104, heat exchange information of the heat exchange device 106, and electricity production and heat production information of the cogeneration generator 108 And the like. In addition, heat supply and demand information is supplied to a number of users in residential, commercial or industrial complexes with heat energy produced or stored in the heat production device 102, the heat storage device 104, the heat exchange device 106, and the cogeneration generator 108. It may include information such as heat transport.

The control unit 116 is based on the power system information of the power system 10 and the collective energy system information of the collective energy system, a heat production device 102, a heat storage device 104, a heat exchange device 106, and a combined heat and power generator. Control the operation of 108. For example, the control unit 116 controls to adjust the amount of heat produced by the heat producing device 102 or the amount of power consumption of the heat producing device 102 based on the power system information.

In addition, the control unit 116 receives an instruction signal of the power system or an instruction signal of the collective energy system. Here, the indication signal of the power system or the indication signal of the collective energy system includes a signal generated by considering the stability and economy of the power system 10 and the collective energy system.

And, the indication signal of the power system or the indication signal of the collective energy system includes the power system 10 and the collective energy system, and prioritizes stability, and the stability of the power system 10 and the stability of the collective energy system are satisfied. In some cases, it includes signals generated by taking into account the economics of each line. At this time, the economic feasibility of the power system and the collective energy system may be calculated in consideration of the power generation cost and heat conversion cost of each generator disposed in each system.

In addition, the control unit 116 is based on the command signal of the power system 10 or the command signal of the collective energy system, which comprehensively considers the stability and economy of the power system 10 and the collective energy system. The operation of the storage device 104 and the heat exchange device 106 can be controlled.

In addition, the control unit 116 detects the command signal of the power system operator, the command signal of the collective energy system operator, and the system frequency of the power system, and calculates a control signal based on the detected signal. Further, the control unit 116 controls the operation of the heat production device 102, the heat storage device 104, and the heat exchange device 106 based on the control signal.

In addition, the control unit 116 is based on the Ramp Rate characteristic information of the cogeneration generator 108 linked to the collective energy system, the heat production device 102, the heat storage device 104, and the heat exchange device 106 ) Can be controlled. The control unit 116 controls the operation of the heat production device 102, the heat storage device 104, and the heat exchange device 106 based on the ramp rate characteristic information of the cogeneration generator 108, so that the cogeneration generator 108 The power generation efficiency and ramp rate of can be improved.

For example, the control unit 116 controls the heat generation device 102, the heat storage device 104, and the heat energy of the heat exchange device 106 to be supplied to the cogeneration unit 108 to generate power generation of the cogeneration unit 108 Efficiency and ramp rate characteristics can be improved.

In addition, the control unit 116 controls the amount of heat produced by the cogeneration generator 108 by using the excess power produced by the power system 10 or the surplus power expected to be over produced by the power system, thereby generating power generation of the cogeneration generator 108 It can also improve efficiency and ramp rate. Here, the surplus power includes an amount of power obtained by subtracting the total load amount from the total amount of power generation when it is expected that the total amount of power generated by the power system 10 exceeds the total load amount of the power system 10. Further, the surplus power includes power that makes the power system 10 unstable due to variations in the output of the variable power supply or constraints on the power system 10.

In addition, the control unit 116 controls the amount of heat produced by the heat generating device 102 using the frequency information of the power system 10. Here, the frequency information includes real-time system frequency, system frequency predicted value, frequency change rate, or frequency sensitivity. In addition, the frequency change rate or frequency sensitivity includes the rate of change or degree of change of the system frequency according to the change of time. In addition, the frequency change rate may have a positive value (+) or a negative value (-). For example, when the frequency change rate is positive, it includes the case where the system frequency increases rapidly. And, when the frequency change rate is negative, it includes a case where the system frequency decreases rapidly.

Then, the control unit 116 compares the system frequency of the power system 10 with a frequency set value. The control unit 116 adjusts the amount of power consumption supplied from the power system 10 to the collective energy system to stably maintain the power supply and demand of the power system 10 or to keep the system frequency of the power system 10 within a predetermined range. To control the operation of the heat production device 102, the heat storage device 104, and the heat exchange device 106.

For example, when the system frequency of the power system 10 increases, the control unit 116 increases the power consumption of the heat production device 102, the heat storage device 104, and the heat exchange device 106, Through this, the system frequency can be lowered within the set value. Conversely, when the system frequency of the power system 10 decreases, the control unit 116 reduces the power consumption of the heat production device 102, the heat storage device 104, and the heat exchange device 106 to reduce the power system. The system frequency of (10) can be increased.

In addition, the control unit 116 controls the amount of heat produced by the heat generating device 102 by using the power supply and demand information of the power system 10. At this time, the controller 116 may analyze the power supply and demand information of the power system 10 to predict the power supply and demand imbalance of the power system 10.

Here, the power supply and demand imbalance of the power system 10 is the dropout of the generator connected to the power system 10, the sudden change in power demand of the power system 10, or the output of the volatile power supply 16 connected to the power system 10 It can be caused by fluctuations and sudden changes. In addition, the power supply and demand imbalance includes a case where the deviation between the power supply of the power system 10 and the power demand exceeds the power supply and demand set value.

In addition, the control unit 116 combines the heat supply and demand information of the collective energy system, the frequency information of the power system 10, or the power supply and demand information, and the heat production device 102, the heat storage device 104, and the heat exchange device ( 106) can also be controlled.

In addition, the control unit 116 controls the operation of the heat production device 102 by comprehensively considering the economic feasibility of the power system 10 and the collective energy system. For example, the control unit 116 compares and analyzes the economic feasibility of the power system 10 and the collective energy system, and through this, the heat production device 102 and the heat storage device 104 ), and the operation of the heat exchange device 106 can be controlled.

In addition, the control unit 116 is based on the output fluctuation information of the variable power supply linked to the power system 10 and the reserve capacity information of the power system, the heat production device 102, the heat storage device 104, the heat exchange device ( 106), and control the operation of the cogeneration generator 108.

In addition, the control unit 116 is a power generation efficiency control unit 118, a frequency control unit 120, a power supply and demand control unit 122, an instruction signal control unit 124, and a variable power output variation control unit 126 according to an embodiment of the present invention. , A net load control unit 128, a response amount control unit 130, a renewable output variation control unit 132, a reserve power control unit 134, and a generator frequency response control unit 136.

The power generation efficiency control unit 118 operates the heat production device 102, the heat storage device 104, and the heat exchange device 106 to improve power generation efficiency and ramp rate characteristics of the cogeneration generator 108. And control heat transport. The power generation efficiency control unit 118 controls the power generation amount of the cogeneration generator 108 or the heat production amount of the cogeneration generator 108 based on the ramp rate characteristic information of the cogeneration generator 108.

For example, the power generation efficiency control unit 118 compares the ramp rate of the cogeneration generator 108 with a set ramp rate value. In addition, when the ramp rate of the cogeneration generator 108 is less than the set ramp rate, the power generation efficiency control unit 118 controls the cogeneration generator 108 to directly additionally produce heat and use the generated heat for power generation. In addition, the power generation efficiency control unit 118 controls to supply the heat produced by the heat production device 102 to the cogeneration generator 108, thereby improving the power generation efficiency and the ramp rate of the cogeneration generator 108.

In addition, the power generation efficiency control unit 118 controls to be supplied to the cogeneration generator 108 through a heat transport line produced by the energy conversion device, thereby improving the power generation efficiency and ramp rate of the cogeneration unit 108.

As described above, the present invention controls the power system to improve the power generation efficiency and ramp rate of the generators by using the excess power produced by the power system or the surplus power expected to be over produced by the power system. It provides an environment that can prevent sudden changes in the system frequency.

In addition, the present invention provides an environment in which generators can generate power according to the demand curve of the power load even when the output of the variable power source sharply decreases or the power load increases rapidly by improving the power generation efficiency and ramp rate of the generators.

The frequency control unit 120 detects the grid frequency of the power system 10, and operates the heat production device 102, the heat storage device 104, and the heat exchange device 106 based on the change state of the grid frequency. Control.

For example, when the system frequency of the power system 10 increases, the frequency controller 120 may reduce the amount of power produced in the collective energy system or increase the amount of power consumption in the collective energy system. In addition, when the system frequency of the power system 10 decreases, the frequency control unit 120 may increase the amount of power produced in the collective energy system or reduce the amount of power consumption in the collective energy system.

In addition, the frequency control unit 120 compares the system frequency of the power system 10 with a frequency set value. The frequency control unit 120 may compare the real-time system frequency with a frequency set value, or may compare the system frequency predicted at a specific time with a frequency set value. In addition, the frequency control unit 120 may compare the frequency sensitivity or the frequency change rate with a set value.

And, based on the frequency comparison result, the frequency control unit 120 stably maintains the power supply and demand of the power system 10 and maintains the frequency of the power system 10 within a predetermined range. It controls the operation of the storage device 104 and the heat exchange device 106.

For example, when the system frequency is greater than the frequency set value, the frequency controller 120 controls to increase the amount of heat production or power consumption of the heat production device 102. In addition, the frequency control unit 120 may control to reduce the amount of heat production or power consumption of the heat production device 102 when the system frequency is less than the frequency set value.

Further, the frequency control unit 120 stably maintains the power supply and demand of the power system 10 and maintains the frequency of the power system 10 within a predetermined range based on the comparison result of the frequency change rate. Control the operation of

For example, the frequency control unit 120 controls to increase the amount of heat produced by the heat production device 102 when the frequency sensitivity or the frequency change rate is greater than a set value and the system frequency increases rapidly. In addition, when the system frequency decreases sharply due to a generator dropout or a large-scale load increase, the frequency control unit 120 reduces the heat production amount of the heat production device 102 or stops the operation of the heat production device 102. Can be controlled.

For example, the frequency change rate of the power system may have a negative value. And, when the frequency change rate having a negative value becomes smaller than the set value and the system frequency decreases sharply, the frequency control unit 120 reduces the heat production amount of the heat production device 102 or operates the heat production device 102 Can be controlled to stop.

The power supply and demand control unit 122 analyzes the power supply and demand information of the power system 10 from the power system information, and predicts the power supply and demand imbalance of the power system 10. The power supply and demand control unit 122 detects in advance the case in which the deviation between the power supply and the power demand of the power system 10 exceeds the power supply and demand set value due to the dropout of a generator, a sudden change in power demand, or a sudden change in the output fluctuation of volatile power. It is predictable.

In addition, the power supply and demand control unit 122 stably maintains the power supply and demand of the power system 10 and maintains the frequency of the power system 10 within a predetermined range based on the power supply and demand prediction information. , Control the operation of the heat storage device 104, and the heat exchange device 106.

For example, when the power supply of the power system 10 is greater than the power demand due to the power supply and demand imbalance of the power system 10, the power supply and demand control unit 122 may use the heat generating device 102 disposed in the collective energy system. Through the power system 10 is controlled to convert excess power to be over-produced or expected to be over-produced into thermal energy.

In addition, when the power supply from the power system 10 is less than the power demand due to the power supply and demand imbalance of the power system 10 or the power demand increase rate in the power system 10 is greater than the set value, the power supply and demand control unit 122 ) Can be controlled to reduce the heat production amount of the heat production device 102 or stop heat production. Here, the power demand increase rate includes the load 15 of the power system 10 or a change rate at which the power demand increases.

The instruction signal control unit 124 is heated to stably maintain the power supply and demand of the power system 10 and keep the frequency of the power system 10 within a predetermined range based on the instruction signal of the power system and the instruction signal of the collective energy system. It controls the operation of the production device 102, the heat storage device 104, and the heat exchange device 106. For example, the instruction signal control unit 124 may control the heat production unit 102 to control the amount of heat produced or power consumption by the instruction signal of the power system or the instruction signal of the collective energy system.

The variable power output fluctuation control unit 126 includes a heat generating device 102, a heat storage device 104, a heat exchange device 106, and a cogeneration generator 108 based on the fluctuation information of output fluctuations connected to the power system. Control the operation of

The variable power output variation control unit 126 analyzes the output variation of the variable power source 16 from the power system information, and controls the operation of the heat generating device 102 disposed in the collective energy system based on the analyzed result. Here, the variable power supply 16 includes a power source whose power generation is determined or fluctuates according to an external factor such as a weather condition.

In other words, the variable power output variation control unit 126 analyzes the change in power system information due to the output variation of the variable power supply 16 linked to the power system 10, and arranges it in the collective energy system based on the analyzed result. Controls the amount of heat production or power consumption of the generated heat production device 102. Here, the change in the power system information includes a change in at least one of net load information, response amount information, or new and renewable output information.

Then, the variable power output variation control unit 126 analyzes changes in net load information, response amount information, and output information of a renewable energy source of the power system 10 from the power system information. In addition, the variable power output fluctuation control unit 126 compares at least one of net load information, response amount information, or output information of the renewable energy source with a set value to provide the heat production device 102 and the heat storage device 104. ), the heat exchange device 106, and the cogeneration generator 108.

The net load amount control unit 128 calculates the net load amount of the power system 10 according to the change in the output of the variable power supply 16 linked to the power system 10 and predicts the change in the net load amount. Here, the net load amount information includes a value obtained by subtracting an output amount of a variable power source (eg, a renewable energy source) linked to the power system 10 from the total load amount of the power system 10.

In addition, the net load amount control unit 128 compares the calculated net load amount or the predicted net load amount with a net load amount set value. Further, the net load amount control unit 128 controls the operation of the heat production device 102 and the heat production amount based on the comparison result of the net load amount.

For example, when the net load amount is less than the net load amount set value, the net load amount control unit 128 may control to increase the heat production amount of the heat production device 102. In addition, when the net load amount exceeds the net load amount set value, the net load control unit 128 controls to reduce the heat production amount of the heat production device 102 or stops the heat production operation of the heat production device 102 Can be controlled to do.

The response amount control unit 130 calculates the response amount of the power system 10 by using the power system information, and predicts a change in the response amount. Here, the response amount information is the response amount value that the generators connected to the power system can additionally generate in order to respond to the fluctuations in the output of the variable power source (for example, a renewable energy source) connected to the power system 10 Includes the response speed at which the generator can generate additional power in response to fluctuations in the output of the variable power supply.

Then, the response amount control unit 130 calculates the response amount of the power system 10 according to the change in the output of the variable power supply 16 linked to the power system 10, and predicts the change in the response amount. In addition, the response amount control unit 130 calculates the amount of generation additionally required from the power system 10 in order to respond to the fluctuation in the output of the variable power supply 16.

In addition, the response amount control unit 130 compares the calculated response amount or the predicted response amount with the amount of generation additionally required to the power system 10 in order to respond to the fluctuation in the output of the variable power supply 16. In addition, the response amount control unit 130 may analyze the response speed at which the generators can additionally generate power in response to the fluctuation in the output of the variable power supply 16 from the power system information, and compare the analyzed response speed with a set value.

The response amount control unit 130 controls the operation of the heat production device 102 disposed in the collective energy system based on the comparison result of the response amount. For example, when the amount of response is smaller than the amount of power additionally required in the power system 10 in order to respond to fluctuations in the output of a renewable energy source, control to reduce the amount of heat produced by the heat generating device 102 or generate heat The device 102 is controlled to stop producing heat.

In addition, when the response speed of the generators is slow and it is difficult to cope with the fluctuation in the output of the variable power supply 16, the response amount control unit 130 controls to reduce the heat production amount of the heat production device 102, or the heat production device 102 ) Can be controlled to stop heat production.

The renewable output variation control unit 132 analyzes the output amount of the renewable energy source connected to the power system 10 and the output variation of the new renewable energy source. Here, the renewable energy sources include wind power generators, solar power generators, geothermal power generators, fuel cells, bio energy, and marine energy.

In addition, the renewable output fluctuation control unit 132 prevents the frequency fluctuation of the power system 10 due to fluctuations in the output of the renewable energy source linked to the power system 10 or prevents the power supply and demand imbalance in the power system 10. Control the operation of the heat production device 102 disposed in the collective energy system to prevent.

In addition, the renewable output fluctuation control unit 132 controls the heat production amount and power consumption amount of the heat production device 102 based on the fluctuation in the output of the renewable energy source. For example, the renewable output fluctuation control unit 132 controls to increase the heat production amount of the heat production device 102 when the output of the renewable energy source increases, and when the output of the renewable energy source decreases In the heat production device 102 can be controlled to reduce the amount of heat produced.

Therefore, the collective energy system 100 of the present invention increases or decreases the amount of heat produced by the heat production device 102 disposed in the collective energy system based on the output fluctuation of the renewable energy source connected to the power system 10. By controlling so that it is possible to minimize the frequency change of the power system 10 due to the instantaneous output fluctuation of the renewable energy source.

That is, the collective energy system 100 of the present invention controls the amount of power consumption in the collective energy system based on the fluctuation in the output of the renewable energy source, and as a result, the output of the new and renewable energy source is flattened to the power system 10. Provides the same effect as provided.

The reserve power control unit 134 analyzes the change of reserve power amount information and reserve power amount of the power system 10 from the power system information. Then, the reserve power control unit 134 controls the operation of the heat production device 102 disposed in the collective energy system based on the reserve power amount information and the change in the reserve power amount of the power system 10. Here, the reserve power amount information includes a frequency following reserve power, a frequency adjustment reserve power, a pure reserve power, or a reserve power in a driving state.

The frequency tracking reserve power or the frequency adjustment reserve power includes a reserve power capable of increasing or decreasing the amount of power generated by the generators disposed in the power system 10 for a set time (eg, 1 second). In addition, the frequency tracking reserve power includes a reserve power capable of automatically responding instantaneously according to the automatic generation control or frequency following operation of a generator linked to the power system. In addition, the frequency adjustment reserve power includes reserve power for response to small demand changes and system frequency adjustment.

In addition, the pure power reserve is a reserve power capable of automatic power generation by increasing the output and responding to an instantaneous (for example, 10 seconds) in preparation for a sudden frequency drop due to an accident such as an instantaneous load change or a generator dropout. AGC) or the output margin of the generator that can be automatically operated according to the governor free operation of the governor.

In addition, the reserve power in the operating state includes the reserve power that can be generated by all generators outputting from the power system 10.

The reserve power control unit 134 analyzes the change of reserve power amount information and reserve power amount of the power system 10 from the power system information. The reserve power control unit 134 may predict a change in the reserve power amount of the power system 10 based on past data and an output change of the current variable power.

Then, the reserve power control unit 134 compares the amount of reserve power of the power system 10 with a set reserve power value.

In addition, the reserve power control unit 134 adjusts the heat production amount of the heat production device 102 disposed in the collective energy system to secure the reserve power amount of the power system 10.

For example, when the reserve power amount of the power system 10 is less than the reserve power setting value, the reserve power control unit 134 increases the heat production amount of the heat production device 102 or decreases the power consumption amount of the heat production device 102. Control to increase.

In addition, the reserve power control unit 134 turns on/off the operation of the heat production device 102 or controls the power consumption of the heat production device 102 based on the reserve power amount information.

Accordingly, the collective energy system 100 of the present invention increases the power consumption of the heat generating device 102 disposed in the collective energy system, thereby causing an increase in the amount of power generation of the generators responsive to the system frequency of the power system 10, This provides the effect of increasing the amount of reserve power of the power system 10.

The generator frequency responsive control unit 136 analyzes the output information of the base generator 12 linked to the power system 10, and a part of the electric power produced by the base generator 12 is a heat generating device disposed in the collective energy system ( 102). Further, the generator frequency responsive control unit 136 controls the operation of the heat production device 102 so that a part of the power produced by the base generator 12 responds to the change in the system frequency of the power system 10.

Here, the base generator includes a generator in which there is no speed adjustment ratio (DROOP) representing a change in the output of the generator according to the frequency change of the power system or the speed adjustment ratio is less than a set value. In addition, the base generator includes a generator that cannot perform a frequency following operation in the power system (for example, a nuclear power generator) or a generator whose frequency response speed is less than a set value (for example, a coal generator).

The generator frequency response control unit 136 receives power system information from the power system information receiving unit 112 and analyzes the power system information. The generator frequency responsive control unit 136 analyzes the frequency information of the power system 10 and the power supply and demand information of the power system so that part of the power produced by the base generator 12 responds to the change in the system frequency of the power system 10. do.

And, the generator frequency responsive control unit 136 receives the output information of the base generator 12 linked to the power system 10, and generates heat arranged in the collective energy system part of the power produced by the base generator 12 Assign to device 102.

Further, the generator frequency responsive control unit 136 controls the power consumption of the heat production device 102 based on the frequency comparison result so that a part of the power produced by the base generator 12 responds to the change in the system frequency.

For example, the generator frequency responsive control unit 136, when the system frequency of the power system 10 is increased, to increase the use of the power allocated to the heat production device 102, the heat production amount of the heat production device 102 Increase And, the generator frequency responsive control unit 136, when the system frequency of the power system 10 decreases, to reduce the use of the power allocated to the heat production device 102, to reduce the amount of heat produced by the heat production device 102 I can make it.

Further, the generator frequency responsive control unit 136 turns on/off the operation of the heat production device 102 or turns off the operation of the heat production device 102 so that the output of the base generator 12 responds to the change in the system frequency of the power system. Control power consumption.

Through this, the collective energy system 100 of the present invention enables the output control of generators that cannot perform a frequency following operation in the power system or generators with a low frequency response speed, thereby enabling the power system to be controlled by a conventional base generator or a variable power source. It provides an environment that can eliminate frequency instability.

6 is a flowchart briefly showing a process of controlling the operation of the collective energy system according to the first embodiment of the present invention. In this case, the following flowchart will be described using the same reference numerals in connection with the configurations of FIGS. 1 to 5.

6, the collective energy system 100 for power system frequency control according to the first embodiment of the present invention receives power system information from an energy management system (EMS) of the power system 10 And, the received power system information is analyzed (S102, S104).

At this time, the power system information and power system analysis information include information on the characteristics of the ramp rate of the generator connected to the power system, information on the frequency of the power system, information on the power supply and demand of the power system, and information on the net load by the variable power supply 16. , Response amount information by the variable power supply 16, new and renewable output fluctuation information linked to the power system, reserve capacity information of the power system, or output information of a base generator linked to the power system.

Then, the collective energy system 100 receives collective energy system information from an energy management system (EMS) of the collective energy system, and analyzes the received collective energy system information (S106, S108).

Here, the collective energy system information and the collective energy system analysis information include information on the characteristics of the ramp rate of the generator linked to the collective energy system, information on the heat supply and demand of the collective energy system, the usable capacity of the heat storage tank, the heat demand prediction information, and the current heat. It includes production information, current heat consumption information, and electricity supply and demand information of the collective energy system.

And, the collective energy system 100 is a heat production device 102, a heat storage device 104, a heat exchange device 106, arranged in the collective energy system by considering the power system information and the collective energy system information in combination, And controlling the operation of the cogeneration generator 108 (S110).

For example, the collective energy system 100 of the present invention includes frequency information of the power system, power supply and demand information of the power system, net load information by the variable power supply 16, response amount information by the variable power supply 16, power It is possible to control the heat production amount of the heat production device 102 to be adjusted by comparing information on a new and renewable output fluctuation linked to the system, information on a reserve capacity of the power system, and the like with a set value.

In addition, the collective energy system 100 supplies the heat energy of the heat production device 102, the heat storage device 104, and the heat exchange device 106 to the load 20 of the collective energy system, or the combined heat and power generator 108 It is supplied to (S112). At this time, the collective energy system 100 may supply power generated by the cogeneration generator 108 to the power system 10.

As described above, the collective energy system 100 of the present invention analyzes the power system information and the collective energy system information, and the heat production device 102, the heat storage device 104, and the heat exchange device ( 106), by controlling the power produced in the power system to be constantly consumed, it provides an environment in which the power supply and demand of the power system can be maintained and the frequency of the power system can be stably maintained.

7 is a flowchart schematically illustrating a process of controlling the operation of a collective energy system using information on a ramp rate characteristic of a generator according to a second embodiment of the present invention. In this case, the following flowchart will be described using the same reference numerals in connection with the configurations of FIGS. 1 to 5.

Referring to FIG. 7, the collective energy system 100 for power system frequency control according to the second embodiment of the present invention receives ramp rate characteristic information of a generator, and analyzes the received ramp rate characteristic information. Do (S202, S204). Here, the ramp rate characteristic information of the generator includes ramp rate characteristic information of the cogeneration generator 108 disposed in the collective energy system. In addition, the ramp rate characteristic information is a variation of the generator output per minute, and includes the evaporation rate of the generator, the deceleration rate of the generator, or the rate adjustment rate of the generator.

Then, the collective energy system 100 compares the ramp rate of the combined heat and power generator with the set ramp rate (S206).

The collective energy system 100 controls the operation and heat transport of the heat production device 102, the heat storage device 104, and the heat exchange device 106 based on the comparison result (S208). For example, when the ramp rate of the combined heat and power generator 108 is less than the ramp rate set value, the collective energy system 100 may be configured with the heat generating device 102, the heat storage device 104, and the heat exchange device 106. By controlling the heat to be provided to the cogeneration generator 108, the power generation efficiency and the ramp rate of the cogeneration generator 108 can be improved.

In addition, the collective energy system 100 may adjust the amount of heat produced by the combined heat and power generator 108 based on the comparison result (S210). For example, the collective energy system 100 controls to increase the amount of heat produced by the combined heat and power generator 108 when the ramp rate of the combined heat and power generator 108 is less than the set value of the ramp rate, thereby generating power generation of the combined heat and power generator 108 Efficiency and ramp rate characteristics can be improved (S212).

At this time, the collective energy system 100 of the present invention controls the amount of power supply and power consumption of the power system 10 and the collective energy system by considering the power system information and the collective energy system information in combination, while controlling the ramp rate information of the generator. The amount of heat produced by the heat production device 102 or the cogeneration generator 108 may be adjusted as a basis.

For example, the collective energy system 100 of the present invention controls the operation of the heat production device 102, the heat storage device 104, and the heat exchange device 106 using frequency information or power supply and demand information of the power system. When doing so, by controlling to supply the heat energy of the heat production device 102, the heat storage device 104, and the heat exchange device 106 to the cogeneration generator 108 based on the ramp rate information of the cogeneration generator 108 , It is also possible to improve the power generation efficiency and ramp rate characteristics of the cogeneration generator 108.

As described above, the present invention controls the cogeneration generator to additionally produce heat and use it for power generation by using excess power of the power system or surplus power expected to be over-produced in the power system based on the ramp rate characteristic information of the generator. Or, by controlling the heat production amount of the heat production device to be adjusted, the power generation efficiency and ramp rate characteristics of the combined heat and power generator are improved, and the system frequency of the power system can be prevented from sudden change due to fluctuations in the output of variable power. .

In addition, the present invention improves the power generation efficiency and ramp rate characteristics of the generators, so that even when the output of the variable power source sharply decreases or the power load increases, the generators generate power according to the demand curve of the power load (eg, duck curve). Provide an environment that can be produced.

8 is a flowchart briefly showing a process of controlling the operation of the collective energy system using the grid frequency of the power system according to the third embodiment of the present invention. In this case, the following flowchart will be described using the same reference numerals in connection with the configurations of FIGS. 1 to 5.

Referring to FIG. 8, the collective energy system 100 for power system frequency control according to a third embodiment of the present invention receives power system information and analyzes the received power system information (S302, S304). At this time, the collective energy system 100 may analyze frequency information of the power system and predict a change in system frequency due to a change in the output of the variable power supply 16. Here, the frequency information includes real-time system frequency, system frequency predicted value, frequency change rate, frequency sensitivity, and the like. In addition, the frequency change rate may have a positive value (+) or a negative value (-). For example, when the frequency change rate is positive, it includes the case where the system frequency increases rapidly. And, when the frequency change rate is negative, it includes a case where the system frequency decreases rapidly.

Then, the collective energy system 100 monitors the grid frequency of the power system 10 and compares the real-time grid frequency of the power system 10 with a frequency set value (S306). Of course, the collective energy system 100 compares the system frequency predicted value, the frequency change rate, or the frequency sensitivity with the frequency set value, and based on the comparison result at this time, the heat production device 102, the heat storage device 104, and the heat exchange It is also possible to control the operation and heat transport of the device 106.

In addition, when the system frequency of the power system 10 increases and is greater than the first frequency set value, the collective energy system 100 increases the amount of heat produced by the heat generating device 102 or the heat exchange device 106 It is possible to increase the amount of heat conversion (S308, S310). That is, when the system frequency increases, the collective energy system 100 consumes the excess power produced in the power system 10 in the collective energy system, and through this, the system frequency of the power system 10 can be maintained within a predetermined range. have.

In addition, the collective energy system 100 calculates the power consumption of the heat production device 102 based on the difference between the grid frequency and the first frequency set value, and consumes the calculated power consumption of the heat production device 102. It is possible to control the amount of heat produced (S312). At this time, the collective energy system 100 may control the amount of power consumption in the collective energy system by using the difference between the system frequency and the first frequency set value. For example, the collective energy system 100 may be controlled to increase the amount of heat produced in the collective energy system in proportion to the difference between the system frequency and the first frequency set value.

Then, the collective energy system 100 compares the system frequency of the power system 10 with a second frequency set value smaller than the first frequency set value (S314). And, when the system frequency decreases and is smaller than the second frequency set value, the collective energy system 100 reduces the amount of heat produced by the heat production device 102 or reduces the amount of heat conversion of the heat exchange device 106. Can be (S316). That is, the collective energy system 100 may reduce the amount of power consumption in the collective energy system when the system frequency decreases, thereby stabilizing the system frequency of the power system 10 within a predetermined range.

And, the collective energy system 100 calculates the power consumption of the heat production device 102 based on the difference between the system frequency and the second frequency set value, and the heat production amount of the heat production device 102 to consume the power consumption. Can be controlled (S318).

Accordingly, the collective energy system and the collective energy system control method of the present invention control the operation of the heat generating device 102 and the heat exchange device 106 disposed in the collective energy system based on the frequency information of the power system 10. , Provides an environment in which the system frequency of the power system 10 can be stably maintained.

In addition, the collective energy system and the collective energy system control method of the present invention can be controlled to increase the amount of power consumption in the collective energy system when the frequency change rate is greater than the set value and the system frequency increases rapidly. And, in the case of an emergency in which the system frequency sharply decreases due to a generator dropout or a large-scale load surge, the collective energy system 100 may be controlled to reduce the power consumption of the heat generating device 102 and the heat exchange device 106. have.

For example, the frequency change rate of the power system may have a negative value. And, when the frequency change rate having a negative value is smaller than the set value and the system frequency is rapidly decreased, the collective energy system of the present invention reduces the power consumption of the heat production device 102 and the heat exchange device 106, or It is possible to control to stop the operation of the heat production device 102 and the heat exchange device 106.

In other words, when the amount of power generated in the power system 10 increases and the system frequency increases, the power consumption of the collective energy system may be increased, thereby lowering the system frequency of the power system 10. In addition, when the power generation amount of the power system 10 decreases and the system frequency decreases, the power consumption of the collective energy system is reduced to provide an environment in which the system frequency of the power system 10 can be increased.

9 is a flowchart schematically illustrating a process of controlling the operation of the collective energy system using power supply and demand information of the power system according to the fourth embodiment of the present invention. In this case, the following flowchart will be described using the same reference numerals in connection with the configurations of FIGS. 1 to 5.

9, the collective energy system 100 for power system frequency control according to the fourth embodiment of the present invention receives power system information and analyzes the received power system information (S402, S404).

At this time, the collective energy system 100 may analyze the power supply and demand information of the power system 10 and predict the power supply and demand imbalance of the power system 10 based on this (S406). Here, the power supply and demand imbalance of the power system 10 is the dropout of the generator connected to the power system 10, the sudden change in power demand of the power system 10, or the output of the volatile power supply 16 connected to the power system 10 It includes a case where the deviation between the power supply of the power system 10 and the power demand exceeds the set value of power supply and demand due to sudden change or the like.

And, when the power supply of the power system 10 is greater than the power demand due to the power supply and demand imbalance of the power system 10, the collective energy system 100 is expected to be over-produced or over-produced in the power system 10. It is determined to receive surplus power (S408, S410).

In addition, the collective energy system 100 allows the heat generating device 102 or the heat exchange device 106 disposed in the collective energy system to stably maintain the power supply and demand of the power system 10 to consume the surplus power. Control (S412).

In addition, when the power supply from the power system 10 is less than the power demand due to the unbalanced power supply and demand of the power system 10, the collective energy system 100 controls to reduce the amount of power consumed by the collective energy system (S414 ).

For example, the collective energy system 100 may reduce the amount of heat produced by the heat generating device 102 or reduce the amount of heat conversion of the heat exchange device 106 so that the power supply and demand of the power system 10 can be stably maintained. And, if necessary, control to stop the operation of the heat production device 102 and the heat exchange device 106 (S416).

At this time, the collective energy system 100 may control the operation of the heat generating device 102 and the heat exchange device 106 by using the rate of increase in power demand in the power system. For example, when the rate of increase in power demand in the power system is greater than a set value, the collective energy system 100 may control the heat production device 102 to reduce the heat production amount or stop the heat production.

Therefore, the present invention predicts the power supply and demand imbalance of the power system by analyzing the power supply and demand information of the power system, and the operation of the heat generating device 102 and the heat exchange device 106 disposed in the collective energy system based on the prediction result. By controlling the power system, the problem of unbalanced power supply and demand is solved, thereby providing an environment in which the stability of the power system can be prevented from deteriorating.

10 is a flowchart schematically showing a process of controlling the operation of the collective energy system based on the indication signals of the power system and the collective energy system according to the fifth embodiment of the present invention. In this case, the following flowchart will be described using the same reference numerals in connection with the configurations of FIGS. 1 to 5.

Referring to FIG. 10, the collective energy system 100 for power system frequency control according to the fifth embodiment of the present invention receives a power system instruction signal or a collective energy system instruction signal (S502, S504).

Here, the indication signal of the power system or the indication signal of the collective energy system includes a signal generated by considering the stability and economy of the power system 10 and the collective energy system.

Then, the collective energy system 100 analyzes the signal received from the outside and controls the operation of the heat production device 102, the heat storage device 104, and the heat exchange device 106 (S506, S508).

In addition, the collective energy system 100 regulates the amount of heat produced by the heat generating device 102 to stably maintain the power supply and demand of the power system 10 and maintain the frequency of the power system 10 within a predetermined range, or It is possible to control to adjust the heat exchange amount of the exchange device 106 (S510).

At this time, the instruction signal of the power system or the instruction signal of the collective energy system is determined as a constraint on the stability of the power system 10 and the collective energy system. In addition, the command signal of the power system or the command signal of the collective energy system is determined in consideration of the economics of the power system 10 and the economics of the collective energy system when the stability of the power system 10 and the collective energy system is satisfied.

Accordingly, the collective energy system 100 of the present invention can control the power consumption of the heat production device 102 and the heat exchange device 106 in a direction that reduces energy cost as a whole country based on an external indication signal. For example, when the power system 10 has a lower cost of power generation than that of the collective energy system, so that the economics of the power system 10 are greater than that of the collective energy system, the heat generating device 102 and the heat exchange device 106 ) To increase the power consumption.

11 is a flowchart schematically illustrating a process of controlling the operation of the collective energy system using information on the net load of the power system according to the sixth embodiment of the present invention. In this case, the following flowchart will be described using the same reference numerals in connection with the configurations of FIGS. 1 to 5.

Referring to FIG. 11, the collective energy system 100 for power system frequency control according to the sixth embodiment of the present invention receives power system information, and output fluctuations of the power system 10 due to the volatile power supply 16 Is monitored (S602, S604). Here, the variable power supply 16 includes a power source whose power generation is determined or fluctuates according to an external factor such as a weather condition.

Then, the collective energy system 100 calculates the net load of the power system 10 and predicts a change in the net load (S606). Here, the net load amount information includes a value obtained by subtracting an output amount of a variable power source (eg, a renewable energy source) linked to the power system 10 from the total load amount of the power system 10.

Then, the collective energy system 100 controls the operation of the heat production device 102 and the heat exchange device 106 by comparing the net load amount with the net load amount set value (S608).

For example, when the net load is less than the set value of the net load, the excess power of the power system 10 or surplus power expected to be over-produced in the power system 10 is converted into the heat generating device 102 or heat exchange. Control to supply to the device 106. In addition, the collective energy system 100 increases the amount of heat produced by the heat production device 102 so that the power supply and demand imbalance of the power system 10 due to the variable power supply 16 is resolved or the system frequency of the power system 10 is stabilized. Control to be performed (S610, S612).

In addition, when the net load amount is greater than the net load amount set value, the heat production amount of the heat production device 102 or the heat conversion amount of the heat exchange device 106 is controlled to decrease, and if necessary, the heat production device 102 and heat Control is performed to stop the operation of the switching device 106 (S614, S616).

12 is a graph showing a general daily power demand curve in the power system, and FIG. 13 is a graph showing a change in net load due to an increase in output of a variable power supply.

12 and 13, when the output variability of the variable power supply 16 increases, the net load is formed in a form of a duck curve. In particular, when the proportion of variable power sources (for example, renewable energy sources) connected to the power system 10 increases, the power load sharply decreases after sunrise and the power load increases sharply after sunset. It is expected that the curve will change to a pattern different from the existing power demand curve. In addition, if the duck-curve phenomenon intensifies, it is expected that the error in power demand prediction increases and the constraint cost increases.

For example, the output of a wind power generator, which is a renewable energy source, is largely influenced by wind speed, and the output of a solar power generator is influenced by the amount of insolation of a solar module. In addition, the output of new and renewable energy sources such as wind and solar power is increased during the day, and as a result, the net load of the power system 10 obtained by subtracting the output of the renewable energy source from the total load of the power system 10 is large. Is reduced.

In particular, when the renewable energy source is connected to the power system 10 during the daytime of the season when the output variability of the renewable energy source is large, it causes an imbalance in the power supply and demand of the power system 10, and the power system 10 There is a problem that the frequency of is unstable.

Therefore, the collective energy system 100 of the present invention compares the net load with a set value to control the heat production amount and power consumption of the heat generating device 102 disposed in the collective energy system, and thus, due to the influence of the variable power supply 16 It provides an environment in which the power supply and demand imbalance problem can be solved and the system frequency of the power system 10 can be stably maintained.

14 is a flowchart schematically illustrating a process of controlling the operation of the collective energy system using information on the amount of response of the power system according to the seventh embodiment of the present invention. In this case, the following flowchart will be described using the same reference numerals in connection with the configurations of FIGS. 1 to 5.

Referring to FIG. 14, the collective energy system 100 for power system frequency control according to the seventh embodiment of the present invention receives power system information, and output variation of the power system 10 due to the volatile power supply 16 Is monitored (S702, S704).

In addition, the collective energy system 100 determines the response amount or response speed of the power system 10 that the generators of the power system 10 must generate according to the change in the output of the variable power supply 16 linked to the power system 10. Calculate (S706).

Here, the amount of response includes the amount of generation that the generators connected to the power system 10 can generate additionally in order to respond to the fluctuations in the output of the variable power source (for example, a renewable energy source) connected to the power system 10. do. In addition, the response speed includes a power generation speed at which the generators connected to the power system 10 can generate additional power in response to fluctuations in the output of the variable power supply 16 linked to the power system 10. In this case, the response amount and response rate may include information on characteristics of a ramp rate of the generator.

In addition, the collective energy system 100 calculates the amount of generation additionally required from the power system 10 in order to respond to the fluctuation in the output of the variable power supply 16, and compares the amount of response and the amount of generation required for the power system 10 ( S708).

For example, when the amount of response is smaller than the amount of power required for the power system 10, the amount of heat produced by the heat generating device 102 is reduced, or the amount of heat conversion of the heat exchange device 106 is reduced. (S710, S712). At this time, the collective energy system 100 compares the response speed with a set value, and when it is difficult to cope with the fluctuation of the output of the variable power supply 16 due to the slow response speed of the generators, the heat production of the heat production device 102 is reduced. Or, it may be controlled to reduce the amount of heat conversion of the heat exchange device 106.

For example, the output of renewable energy sources such as wind power and solar power is greatly increased in the morning hours, and thus, the amount of response that the generators of the power system 10 must generate power is sharply reduced. Conversely, in the evening, the output of the renewable energy source is greatly reduced, and as a result, the amount of response that the generators of the power system 10 must generate power increases rapidly.

However, the generators connected to the power system 10 have difficulty in increasing power production or reducing power production according to the sudden change in output of the volatile power supply 16 as described above. Accordingly, a change in the output of the volatile power source 16 such as a renewable energy source causes an imbalance in power supply and demand of the power system 10, and causes a problem that the system frequency of the power system 10 becomes unstable.

However, in the collective energy system 100 of the present invention, when the amount of responsiveness is smaller than the amount of generation additionally required for the power system 10 in order to respond to the fluctuation in the output of the variable power supply 16, the heat generating device disposed in the collective energy system ( By controlling the power consumption of 102) and the power consumption of the heat exchanger 106 to be adjusted, the power supply and demand imbalance problem of the power system 10 can be solved, and the system frequency of the power system 10 can be stably maintained. Provide the environment.

15 is a flowchart briefly illustrating a process of controlling the operation of the collective energy system using information on the reserve power of the power system according to the eighth embodiment of the present invention. In this case, the following flowchart will be described using the same reference numerals in connection with the configurations of FIGS. 1 to 5.

Referring to FIG. 15, the collective energy system 100 for power system frequency control according to an eighth embodiment of the present invention receives power system information and analyzes the received power system information (S802, S804).

Then, the collective energy system 100 monitors the change of the reserve power amount information and the reserve power amount of the power system 10 from the power system information (S806). Here, the amount of reserve power includes a frequency following reserve force, a frequency adjustment reserve force, a pure reserve force, or a reserve force in a driving state.

In addition, the collective energy system 100 compares the amount of reserve power of the power system 10 with a set value of reserve power, and based on the comparison result, stably maintains the power supply and demand of the power system 10 or The amount of power consumption in the collective energy system is controlled to keep the frequency within a predetermined range (S808).

For example, the collective energy system 100 increases the output of the combined heat and power generator 108 when the reserve power of the power system 10 is less than the set reserve power, and converts the power produced from the cogeneration generator 108 into the power system. Control to supply to (10) (S810).

In addition, the collective energy system 100 increases the amount of heat produced by the heat production device 102 disposed in the collective energy system, when the reserve power of the power system 10 is less than the set reserve power, or the heat exchange device ( 106) is controlled to increase the amount of heat conversion (S812).

That is, the collective energy system 100 of the present invention determines the power consumption of the heat generating device 102 disposed in the collective energy system or the power consumption of the heat exchange device 106 when the reserve power of the power system 10 is insufficient. By increasing, it causes an increase in the amount of power generation of the generators responsive to the system frequency of the power system 10, thereby providing an effect of increasing the amount of reserve power of the power system 10.

In addition, when the collective energy system 100 of the present invention is expected to have insufficient reserve power in the power system 10, the power consumption of the heat generating device 102 disposed in the collective energy system or the power consumption of the heat exchange device 106 Increase Then, when it is necessary to increase the reserve power of the power system 10, the power consumption of the heat generating device 102 disposed in the collective energy system or the power consumption of the heat exchange device 106 is reduced, or power consumption Stop the operation.

Through this, the collective energy system 100 of the present invention provides the effect of securing the reserve power of the power system 10 by reducing the power consumption of the heat generating device 102 or the heat exchange device 106. .

In addition, the collective energy system 100 of the present invention, when it is necessary to increase the reserve power of the power system 10, by reducing the power supply from the power system 10 to the collective energy system, the power system 10 By reducing the power supply to the collective energy system 20, it provides the effect of securing the reserve power of the power system 10.

16 is a flowchart schematically illustrating a process of controlling the operation of the collective energy system so that a part of the power produced by the base generator according to the ninth embodiment of the present invention responds to a change in the system frequency. In this case, the following flowchart will be described using the same reference numerals in connection with the configurations of FIGS. 1 to 5.

Referring to FIG. 16, the collective energy system 100 for power system frequency control according to the ninth embodiment of the present invention analyzes the output information of the base generator 12 connected to the power system 10, and the base generator A part of the electric power produced in (12) is allocated to the heat generating device 102 or the heat exchange device 106, which is a power consuming means (S902, S904).

Here, the base generator 12 includes a generator that cannot perform a frequency following operation in the power system or a generator whose frequency response speed is less than a set value. In this case, the generator that cannot perform the frequency following operation may include a nuclear power generator, but the protection scope of the present invention is not limited thereto. In addition, a generator having a frequency response speed less than a set value may include a coal generator, but the protection scope of the present invention is not limited thereto.

In addition, the collective energy system 100 analyzes the change in the grid frequency of the power system 10, compares the grid frequency with the frequency set value, and a part of the power produced by the base generator 12 is Control is made to respond to changes in system frequency (S906, S908).

For example, when the system frequency of the power system 10 increases and is greater than the frequency set value, the collective energy system 100 is the power allocated to the heat production device 102 or the heat exchange device 106 of the collective energy system. Control to increase the use of (S910). Through this, the present invention provides the same effect as performing a frequency following operation in response to a change in the system frequency of the power system 10 in response to part of the power produced by the base generator 12 (S912).

However, when the system frequency of the power system 10 decreases and is smaller than the frequency set value, control is performed to reduce the use of power allocated to the heat generating device 102 or the heat exchange device 106 of the collective energy system ( S914). Through this, the collective energy system 100 may control a part of the power produced by the base generator 12 to perform a frequency following operation in response to a change in the system frequency of the power system 10 (S916).

For example, the domestic power system has the characteristics of an electric island because it is difficult to connect the grid with other countries, and the proportion of nuclear power generators that do not operate according to frequency is high, which is disadvantageous in terms of maintaining frequency stability. However, in the present invention, the heat generating device 102 disposed in the collective energy system consumes part of the power produced by the nuclear power generator in response to the change in the system frequency of the power system 10, so that the nuclear power generator performs a frequency following operation. It provides the same effect.

In other words, when the collective energy system 100 of the present invention consumes part of the power produced by the base generator 12, the heat generating device 102 or the heat exchange device 106 disposed in the collective energy system By controlling the power consumption of the heat generating device 102 or the power consumption of the heat exchange device 106 based on the frequency information of the system 10, the power system 10 cannot perform a frequency following operation or the frequency response speed is increased. It provides an environment in which frequency instability of the power system 10 can be eliminated by enabling low power control of the generator.

That is, the collective energy system 100 of the present invention solves the problem that the frequency of the power system 10 is unstable due to a nuclear power generator that cannot perform a frequency following operation in the power system 10 or a coal power generator with a low frequency response speed. Provide an environment that can be used.

17 is a graph showing an example of determining the priority and output distribution of generators in the order of generation cost.

The power generation cost of the generators connected to the power system is the lowest at the generator (a), and the higher the power generation cost goes to the generator (h). Previously, the generators were prioritized in the order of generators with the lowest generation cost (a<b<c<d<e<f<g<h), and the generators were placed in order to meet the demand curve (x) for each time period. Distribute the output.

Referring to FIG. 16, in the case of operating the power system by setting the priority of generators in the order of power generation cost, generators (a, b, c, d) with low power generation costs are operated at maximum output throughout the day, and for each time period. Only the generators (e, f, g, h) in contact with the demand curve (x) can be controlled to increase or decrease the generator output along the demand curve (x). That is, FIG. 17 is an ideal power generation plan for operating the power system 10 at the lowest cost.

However, the generator (e) has a difficulty in not increasing or decreasing the amount of power generation along the demand curve (x) in the early morning hours as shown in FIG. 17. For example, the generator e at this time may be a coal generator.

18 is a graph showing an example of determining the priority and output distribution of generators by reflecting the constraints of the generator.

Referring to FIG. 18, the generator (f) may increase or decrease the amount of power generation along a demand curve (x) that the generator (e) cannot meet. The generator (f) at this time may be a gas generator.

That is, in the existing power system, there is a constraint to turn on the generator (f) and turn off the generator (e) at dawn. In addition, when there is a limitation in that the generator e is not able to quickly turn on and off the output of the generator, there is a difficulty in controlling to properly maintain the minimum amount of power generation.

Therefore, the existing power system must adjust the priority and output distribution of the generators by reflecting the constraints of the generator as shown in FIG. 18.

19 is a graph showing an example of determining the priority and output distribution of generators to secure a minimum reserve power.

Referring to FIG. 19, in order to secure a minimum reserve power, the existing power system must operate a generator (i) having a power generation cost higher than that of the generator (h). In addition, conventionally, in order to secure the reserve power of the power system, the power generation amount of the generators (d, e, f, g) is constantly decelerated (d1, e1, f1, g1), and the generators (f, g, There is a difficulty in operating by evaporating the generation amount of h,i) (f2,g2,h2,i2).

20 is a graph showing an example of determining the priority and output distribution of generators by reflecting the constraints of the power system.

Referring to FIG. 20, in the existing power system, priority and output distribution of generators should be modified in consideration of the constraints of the power system such as line overload, transient stability, or voltage stability.

Therefore, conventionally, in order to solve the above constraints and stably operate the power system, the generator (k) having the highest power generation cost is operated. In addition, the existing power system constantly degenerates (d1,e1,f1,g1,h1) the amount of power generated by the generators (d,e,f,g,h), and the generators (f,g, The generation of h,i,k) must be evaporated (f2,g2,h2,i2,k2). That is, in the existing power system, it is difficult to operate by modifying the priority and output distribution of generators in consideration of the constraints of the power system in order to secure the stability of the power system.

As a result of comparing and reviewing FIGS. 17 to 20 in this way, the existing power system satisfies the constraints of the generator and the constraints of the power system, and in order to secure the minimum reserve power of the power system, it is preferred to generators with high power generation costs. Since the ranking must be revised and operated, there is a difficulty in increasing energy costs across the country.

21 is a graph showing the priority and output distribution of generators when controlling the heat production of the collective energy system according to an embodiment of the present invention.

Referring to FIG. 21, the collective energy system and the collective energy system control method according to an embodiment of the present invention include a power system 10 through a heat generating device 102 or a heat exchange device 106, which is an energy conversion means of the collective energy system. By controlling the excess power of) to be constantly consumed, it provides an effect of increasing the existing demand curve (x) like the demand curve (y) of the present invention.

For example, in the collective energy system and the collective energy system control method according to an embodiment of the present invention, the heat generating device 102 or the heat exchange device 106 of the collective energy system constantly consumes power of the power system 10 By controlling so that it is possible to solve the power supply and demand imbalance of the power system 10, it is possible to provide an environment in which the system frequency of the power system 10 can be stably maintained.

In other words, the present invention provides an environment in which power is distributed in the order of generators with low power generation costs, while satisfying the constraints of the generator and the constraints of the power system, and securing the minimum reserve power of the power system. In addition, through this, the present invention provides an environment in which the economy of the power system and the collective energy system can be secured by minimizing energy costs throughout the country.

In addition, due to the expansion of the charging load such as an electric vehicle, the power demand of the power system may increase, thereby increasing the uncertainty of the power demand. However, the present invention improves the ramp rate of the generators, adjusts the load of the power system through the energy conversion device and the cogeneration generator of the collective energy system, or secures the reserve power necessary for the power system, thereby increasing the uncertainty of power demand due to the expansion of electric vehicles It provides an environment that can solve the problem and prevent deterioration in the stability of the power system.

As described above, in the collective energy system and the collective energy system control method for power system frequency control according to an embodiment of the present invention, the energy conversion device disposed in the collective energy system constantly adjusts the power of the power system based on the power system information. By consuming, it is possible to distribute the output of the generators connected to the power system in order of generation cost, secure the reserve power of the power system, and provide an environment in which the system frequency of the power system can be stably maintained.

In addition, the present invention constantly consumes the power of the power system through the energy conversion device, and adjusts the power consumption amount of the energy conversion device based on the frequency information and power supply and demand information of the power system. And provide an environment that can minimize changes in the grid frequency of the power system.

In addition, the present invention is to improve the power generation efficiency and ramp rate characteristics of the cogeneration generator by controlling the heat energy produced by the energy conversion device to be supplied to the cogeneration generator, and to prevent a sudden change in the system frequency of the power system due to fluctuations in the output of variable power. Provide an environment that can be used.

In addition, the present invention improves the power generation efficiency and ramp rate characteristics of the generators, thereby providing an environment in which the generators can produce power according to the demand curve of the power load even when the output of the variable power source decreases or the power load increases rapidly.

In addition, the present invention is capable of stably maintaining the power supply and demand of the power system and stably maintaining the frequency of the power system by controlling the power consumption of the energy conversion device arranged in the collective energy system based on the system frequency of the power system. Provide the environment.

In addition, the present invention predicts the power supply and demand imbalance of the power system by analyzing the power supply and demand information of the power system, and compares the power supply and power demand of the power system based on the prediction result, or sets the increase rate of power demand in the power system. By controlling the power consumption of the energy conversion device arranged in the collective energy system compared to, it solves the problem of unbalanced power supply and demand in the power system, thereby providing an environment that can prevent the deterioration of the stability of the power system.

In addition, the present invention minimizes the frequency change of the power system and solves the power supply and demand imbalance problem by controlling the power consumption of the energy conversion device disposed in the collective energy system by considering the information of the power system and the collective energy system information in combination. Provide an environment that can be used.

In addition, the present invention comprehensively considers the economics of the power system and the collective energy system based on the instruction signal of the power system and the collective energy system, and adjusts the power consumption of the energy conversion device disposed in the collective energy system. In addition, it provides an environment that can reduce energy costs across the country.

In addition, the present invention controls the power consumption of the energy conversion device disposed in the collective energy system based on the net load information of the power system due to the change in the output of the variable power connected to the power system. It solves the imbalance problem and provides an environment in which the frequency of the power system can be stably maintained.

In addition, the present invention controls the power consumption amount of the energy conversion device disposed in the collective energy system based on information on the amount of response of the power system due to fluctuations in the output of the volatile power source linked to the power system. It solves the problem of power supply and demand imbalance and provides an environment to stably maintain the frequency of the power system.

In addition, the present invention controls the power consumption of the energy conversion device arranged in the collective energy system based on the output fluctuation of the renewable energy source linked to the power system, It minimizes the frequency change and prevents the frequency change of the power system, thereby providing an environment in which the frequency of the power system can be stably maintained.

In addition, the present invention controls the power consumption of the energy conversion device disposed in the collective energy system based on the output fluctuation of the renewable energy source, as a result, the output of the renewable energy source is flattened to provide the same effect to the power system. It provides an environment that can provide

In addition, the present invention can secure the reserve power of the power system and stably maintain the power supply and demand of the power system by adjusting the power consumption of the energy conversion device disposed in the collective energy system based on the reserve power amount information of the power system. Provide an environment that is there.

In addition, the present invention, when the energy conversion device disposed in the collective energy system consumes part of the power produced by the base generator, by controlling the power consumption of the energy conversion device disposed in the collective energy system based on the power system information, It provides an environment in which frequency instability of the power system can be eliminated by enabling the output control of a generator that cannot perform a frequency following operation in the power system or a low frequency response speed.

In addition, the present invention contributes to the power system in the form of increasing or decreasing the load of the power system by controlling the power consumption of the energy conversion device disposed in the collective energy system, thus controlling the power supply and demand of the power system, and Unlike a generator, it provides an environment that can continuously provide the reserve power required for the power system.

The embodiments of the present invention described above are not implemented only through an apparatus and a method, but may be implemented through a program that realizes a function corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded. Such a recording medium can be executed not only in the server but also in the user terminal.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

Claims (17)

Detecting power system information of the power system,
Based on the information on the power system, it is expected that the power that is over-produced in the power system or over-produced in the power system, which destabilizes the power system due to output fluctuations of the variable power connected to the power system or constraints of the power system Analyzing the expected power,
Controlling the amount of heat produced by a heat generating device disposed in the collective energy system so as to consume excess power produced by the power system or power expected to be over produced by the power system,
Detecting a fluctuation in the output of the volatile power source linked to the power system,
Adjusting the heat production amount of the heat generating device based on the response amount and the response speed of the generators connected to the power system to respond to the fluctuation in the output of the volatile power source,
Receiving information on the reserve capacity of the power system,
Compares the amount of reserve power of the power system with a set value of reserve power, and controls the operation of the heat generating device to secure the amount of reserve power of the power system, but if the amount of reserve power of the power system is less than the set value of reserve power, the heat production device Increasing the amount of heat produced or increasing the amount of power consumption of the heat generating device, and
Controlling to supply heat produced by the heat production device to a load of the collective energy system or a combined heat and power generator,
The power system information,
Ramp rate characteristic information of the generator, frequency information of the power system, power supply and demand information of the power system, net load information by the variable power source, information about the amount of response by the variable power source, and the signal linked to the power system A collective energy system control method for power system frequency control, comprising: output fluctuation information of a renewable energy source, information on a reserve power amount of the power system, and output information of a generator connected to the power system. delete In claim 1,
Controlling to provide heat generated by the heat generating device to the combined heat and power generator so as to improve the power generation efficiency or ramp rate characteristics of the combined heat and power generator disposed in the collective energy system.
Collective energy system control method for power system frequency control further comprising a. In claim 1,
Storing the heat produced by the heat production device in a heat storage device, and
Supplying heat stored in the heat storage device to a load of the collective energy system
Collective energy system control method for power system frequency control further comprising a. In claim 4,
Supplying heat stored in the heat storage device to a combined heat and power generator disposed in the collective energy system
Collective energy system control method for power system frequency control further comprising a. In claim 1,
Converting, by a heat conversion device disposed in the collective energy system, low-temperature water into hot water by using power over-produced in the power system or surplus power expected to be over-produced in the power system based on the power system information, And
Supplying the hot water to the load of the collective energy system
Collective energy system control method for power system frequency control further comprising a. In paragraph 6,
Supplying the hot water converted by the heat conversion device to a cogeneration generator disposed in the collective energy system
Collective energy system control method for power system frequency control further comprising a. In claim 1,
Detecting the system frequency of the power system,
When the grid frequency of the power system increases, increasing the amount of heat produced by the heat generating device, and
When the system frequency decreases, controlling to reduce the heat production amount of the heat production device or stop the heat production of the heat production device
Collective energy system control method for power system frequency control further comprising a. In claim 1,
Detecting power supply and demand information of the power system,
When the power supply of the power system is greater than the power demand, increasing the amount of heat produced by the heat generating device, and
When the power supply from the power system is less than the power demand or the increase rate of the power demand from the power system is greater than a set value, controlling to reduce the heat production amount of the heat generating device or stop the heat production
Collective energy system control method for power system frequency control further comprising a. In claim 1,
Receiving an indication signal of the power system or an indication signal of the collective energy system,
Controlling the amount of heat produced by the heat generating device by the command signal of the power system or the command signal of the collective energy system
Collective energy system control method for power system frequency control further comprising a. In claim 1,
Detecting a fluctuation in the output of the fluctuating power source linked to the power system, and
Comparing the net load amount due to the fluctuation of the output of the volatile power source with the net load amount set value, and adjusting the heat production amount of the heat generating device based on the comparison result
Collective energy system control method for power system frequency control further comprising a. delete In claim 1,
Detecting a fluctuation in the output of a renewable energy source linked to the power system,
Predicting a grid frequency fluctuation of the power system according to the fluctuation of the output of the renewable energy source, and
Adjusting the heat production amount of the heat production device so that the system frequency maintains a predetermined range
Collective energy system control method for power system frequency control further comprising a. delete In claim 1,
Acquiring output information of a generator linked to the power system,
Allocating a portion of the power produced by the generator to the heat generating device, and
Controlling the amount of heat produced by the heat generating device in response to the change in the power system information
Collective energy system control method for power system frequency control further comprising a. In paragraph 15,
The generator connected to the power system,
Generators that cannot perform frequency following operation in the power system or whose frequency response speed is less than the set value
Collective energy system control method for power system frequency control comprising a. In claim 1,
Supplying power produced by a cogeneration generator disposed in the collective energy system to the power system based on power system information or collective energy system information
Collective energy system control method for power system frequency control further comprising a.

Images