KR102310876B1 - Energy conversion contol device between electric power system and district heating system using reserve information of electric power system - Google Patents

Abstract

An apparatus for controlling energy conversion between a power system and a group energy system according to the present invention includes a power system information receiving unit for receiving power system information from a power system, and energy exchange between the power system and the collective energy system based on the power system information It includes an energy conversion control unit to control. Through this, the present invention provides the effect of minimizing the frequency change of the power system due to the constraints of the power system and the variable power supply, solving the problem of imbalance in power supply and demand of the power system, and securing the reserve power of the power system.

Description

Energy conversion control device of electric power system and collective energy system using reserve energy information of electric power system

The present invention relates to an apparatus for controlling energy conversion of an electric power system and a collective energy system using reserve energy information of the electric power system.

The power system must keep the grid frequency constant and minimize the imbalance between power supply and demand so that power can be supplied stably. In addition, the power system must properly secure the necessary reserve power for the power system, and it is necessary to constantly and continuously operate the power system in consideration of the constraints of the power system such as transient stability and voltage stability. Generators connected to such a power system have constraints such as the generator's increase/deceleration speed, minimum start time and stop time.

The existing power system has a difficulty in distributing the output to the generators in the order of generation cost in order to satisfy the constraints of the generator. In addition, in the existing power system, in order to stably operate the power system by satisfying the constraints of the power system or to secure the necessary reserve power for the system, it is necessary to reduce the output of generators with low generation cost while driving generators with high generation cost. There are difficulties.

And, in recent years, the proportion of new and renewable energy sources has been steadily increasing worldwide due to the depletion of fossil fuels and energy shortages. However, variable power sources such as renewable energy sources are composed of energy sources whose output is determined according to climate and weather, making it difficult to control the output of power sources, resulting in an imbalance in power supply and demand due to instantaneous output fluctuations. do.

In addition, the power generation characteristics of the variable power supply are different from those of the conventional generator, which causes a reduction in the inertial energy and response resources of the system. Since this variable power source is not synchronized with the power system and lowers the inertia of the system when it replaces the existing power source and is put into the system, the frequency change due to the power supply and demand imbalance in the system is larger.

Due to the characteristics of the power system, the problems caused by the output variability of the variable power supply will appear larger, and therefore, measures for the stability of power supply and demand in the future power system are urgently needed.

Matters described in this background section are prepared to enhance understanding of the background of the invention, and may include matters that are not already known to those of ordinary skill in the art to which this technology belongs.

The present invention minimizes the frequency change of the power system due to the constraints of the power system and the variable power source, solves the problem of imbalance in power supply and demand in the power system, and can secure the reserve power required for the power system and the collective energy system An energy conversion control device and an energy conversion control method are proposed.

An apparatus for controlling energy conversion of a power system and a group energy system according to an embodiment of the present invention includes a power system information receiver for receiving power system information from a power system, and to consume power of the power system based on the power system information and an energy conversion control unit for controlling the exchange of energy between the power system and the collective energy system.

The energy conversion control unit controls the amount of energy exchange between the power system and the collective energy system based on the ramp rate characteristics of the generator, or controls the power consumption of the power consuming means disposed in the collective energy system It may include a power generation efficiency control unit.

The power generation efficiency control unit adjusts the heat production amount of the cogeneration generator disposed in the collective energy system or the power consuming means disposed in the collective energy system, or by providing the heat generated by the power consuming means to the cogeneration generator. It can be controlled to improve the power generation efficiency of the generator.

The power generation efficiency control unit may control the generator linked to the power system to produce heat using the power produced in the power system, or the power consuming means linked to the power system to produce heat and supply it to the generator.

The energy conversion control unit, a frequency comparison unit for comparing the system frequency or frequency change rate of the power system with a frequency set value, and based on the comparison result, determining the amount of power consumed from the power system to the collective energy system It may include a power consumption control unit.

The energy conversion control unit, a frequency comparison unit for comparing the system frequency or frequency change rate of the power system with a frequency set value, and based on the comparison result, determining the amount of power supplied from the collective energy system to the power system It may include a power supply control unit.

The energy conversion control unit, when the frequency change rate of the power system is greater than the set value and the grid frequency rapidly increases, increases the power consumption in the collective energy system, and the grid frequency is sharply reduced due to generator dropout or large-scale load surge , It can be controlled to reduce the power consumption in the collective energy system or to increase the power supply from the collective energy system to the power system.

The power supply and demand prediction unit may further include a power supply and demand prediction unit for predicting the power supply and demand imbalance of the power system by analyzing the power supply and demand information of the power system.

The power supply and demand imbalance of the power system is the power supply of the power system by at least one of dropout of a generator linked to the power system, a sudden change in the power demand of the power system, or a sudden change in the output fluctuation of the variable power connected to the power system The deviation between and power demand may exceed the power supply and demand setpoint.

The energy conversion control unit, when the power supply of the power system is greater than the power demand, to convert the power that is over-produced or expected to be over-produced in the power system through the power consuming means disposed in the collective energy system to thermal energy It may include a power supply and demand control unit to control.

The energy conversion control unit, when the power supply in the power system is less than the power demand or the power demand increase rate in the power system is greater than the set value, the power produced by the generator disposed in the collective energy system is the power system It may include a power supply and demand control unit that controls to supply to the power supply or controls to reduce the power consumption of the power consuming means.

It may further include a collective energy system information receiver for collecting collective energy system information including at least one of heat supply and demand information of the collective energy system, usable capacity of the heat storage tank, heat demand prediction information, heat production information, and heat consumption information.

The energy conversion control unit may include a heat conversion control unit for controlling the amount of heat production in the collective energy system or the amount of heat storage in the collective energy system by considering the collective energy system information and the power system information in a complex manner.

The energy conversion control unit, in consideration of the economic feasibility of the power system and the economic feasibility of the collective energy system, the power consumption supplied from the power system to the collective energy system or the amount of power supplied from the collective energy system to the power system It may include an economics control unit to control.

An apparatus for controlling energy conversion of a power system and a group energy system according to an embodiment of the present invention includes a power system information receiving unit for receiving power system information, and a change in the power system information due to an output change of a variable power connected to the power system and an energy conversion control unit for controlling the amount of power consumption or power supply between the power system and the collective energy system based on the analyzed result.

The change in the power system information may include a change in at least one of net load information, response amount information, and new renewable output information.

The net load information may include a net load amount of the power system obtained by subtracting the output amount of the variable power connected to the power system from the total load amount of the power system.

The energy conversion control unit controls the amount of power consumed by the collective energy system by comparing a net load according to an output change of the variable power source with a net load set value, and the net load is less than a net load set value. It may include a net load control unit that controls to increase the power consumption.

The response amount information is, in response to the response amount or the output fluctuation of the variable power that the generators linked to the power system can additionally generate in order to respond to the output fluctuations of the variable power connected to the power system, the generators can additionally generate power. It may include a response speed.

The energy conversion control unit controls the amount of power consumption or power supply between the power system and the collective energy system by using the response amount or the response speed according to the output fluctuation of the variable power supply, but to respond to the output fluctuation of the variable power supply When the response amount is smaller than the amount of power additionally required for the power system or it is difficult to respond to the output fluctuation of the variable power supply because the response speed is slow, the power produced by the collective energy system is supplied to the power system or the power consumption means It may include a response amount control unit for controlling to reduce the power consumption.

The energy conversion control unit controls the power consumption or the power supply amount based on the output change of the renewable energy source to prevent the frequency fluctuation of the electric power system due to the output change of the renewable energy source linked to the electric power system It may include a new renewable output change control unit.

An apparatus for controlling energy conversion of a power system and a group energy system according to an embodiment of the present invention includes a power system information receiving unit for receiving reserve power information of the power system, and the power system and group based on the reserve power information of the power system It includes an energy conversion control unit for controlling the amount of power consumption or power supply between the energy systems.

The energy conversion control unit, a reserve power comparison unit for comparing the amount of reserve power of the electric power system with a reserve power set value, and based on the comparison result, by adjusting the output of the power consumption means disposed in the collective energy system of the electric power system It may include a reserve force control unit that controls to secure the reserve force.

The reserve power control unit, when the amount of reserve power of the power system is less than the reserve power set value, may control to adjust the output of the cogeneration generator disposed in the collective energy system.

The reserve power control unit, when the amount of reserve power of the power system is less than the reserve power set value, may control to increase the power consumption of the power consuming means disposed in the collective energy system.

The reserve force information may include at least one of a frequency tracking reserve force, a frequency adjustment reserve force, a net dynamic reserve force, and a reserve force of a driving state.

An apparatus for controlling energy conversion between a power system and a collective energy system according to an embodiment of the present invention includes a power system information receiving unit for receiving output information of a base generator linked to a power system, and a power consuming means disposed in the collective energy system. It controls to consume a part of the power generated by the base generator, and includes an energy conversion control unit for controlling the power consumption of the power consuming means based on the grid frequency of the power system.

The base generator may include a generator in which there is no speed adjustment ratio indicating a change in the output of the generator according to a change in the frequency of the power system, or the speed adjustment ratio is less than a set value.

The base generator may include a generator whose frequency following operation cannot be performed in the power system or whose frequency response speed is less than a set value.

The energy conversion control unit may include a base generator output allocator for allocating a part of the power output from the base generator to the power consuming means.

The energy conversion control unit, a frequency comparison unit for comparing the grid frequency of the power system with a frequency set value, and a portion of the power generated by the base generator to respond to the change in the grid frequency, based on the frequency comparison result It may include a base generator frequency response control unit for controlling the power consumption of the power consumption means.

The method for controlling energy conversion between a power system and a group energy system of the present invention comprises the steps of receiving power system information or power system analysis information, between the power system and the collective energy system based on the power system information or the power system analysis information. Determining the amount of energy exchange, and controlling the amount of power supplied from the group energy system to the power system based on the amount of energy exchange, or controlling the amount of power consumption supplied from the power system to the group energy system includes

The power system information or the power system analysis information includes, ramp rate characteristic information of a generator linked to the power system, frequency information of the power system, power supply and demand information of the power system, net load information by variable power source , At least one of response amount information by the variable power source, output change information of a renewable energy source linked to the power system, reserve power information of the power system, or output information of a base generator linked to the power system can do.

The controlling of the power supply amount or power consumption may include adjusting the heat production amount of the heat production means disposed in the collective energy system based on the lamp rate characteristic information of the generator.

The controlling of the amount of power supply or power consumption includes comparing the grid frequency or frequency change rate of the power system with a frequency set value, and when the grid frequency or frequency change rate is greater than the frequency set value, consumption in the collective energy system It may include the steps of determining the power consumption, and controlling the heat production of the collective energy system by using the power consumption.

The step of controlling the amount of power supply or power consumption includes comparing the grid frequency or frequency change rate of the power system with a frequency set value, determining the amount of power generation of the cogeneration generator or the heat production amount of the cogeneration generator disposed in the collective energy system and when the grid frequency is less than the frequency set value or the frequency change rate is greater than the frequency set value, controlling part or all of the power generation amount of the cogeneration generator to be supplied to the power system.

The controlling of the power supply amount or power consumption may include estimating the power supply/demand imbalance of the power system based on the power supply/demand information of the power system, and the power supply of the power system is higher than the power demand due to the power supply/demand imbalance. In a large case, it may include controlling to convert the excess or expected to be produced in the electric power system to thermal energy through the power consuming means disposed in the collective energy system.

The controlling of the power supply amount or power consumption may include estimating the power supply/demand imbalance of the power system based on the power supply/demand information of the power system, and the power supply of the power system is higher than the power demand due to the power supply/demand imbalance. If it is small, it may include the step of controlling to supply the power produced by the generator disposed in the collective energy system to the power system.

comparing the net load amount of the power system by subtracting the output amount of the variable power connected to the power system from the total load amount of the power system with a net load set value, and when the net load is less than the net load set value, the group It may further include the step of controlling to increase the amount of power consumption in the energy system.

Calculating a response amount or response speed of generators that can additionally generate power by generators connected to the power system in order to respond to a change in the output of the variable power source connected to the power system, and the response amount is the output change of the variable power supply When it is difficult to respond to the output fluctuation of the variable power supply because it is less than the amount of additional power required for the power system in order to respond to the can

Receiving collective energy system information, analyzing the collective energy system information, and controlling the amount of heat production or heat conversion in the collective energy system using the power system information and the collective energy system information may include

Acquiring output variation information of a renewable energy source linked to the power system, and adjusting the heat conversion amount of the collective energy system according to the output variation of the renewable energy source linked to the power system can do.

analyzing 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 increasing the output of the cogeneration generator disposed in the collective energy system to supply it to the electric power system, or the collective energy The method may further include controlling the output of the power consuming means disposed in the system to secure the reserve power of the power system.

Acquiring the output information of the base generator linked to the power system, and controlling the power consuming means disposed in the collective energy system to consume some of the output of the base generator, in response to a change in the system frequency of the power system It may further include the step of controlling to consume the power of the power system.

Further comprising the step of adjusting the power supply amount or the power consumption by comprehensively considering the economic feasibility of the power system and the economic feasibility of the collective energy system, the economic feasibility of the electric power system or the economic feasibility of the collective energy system is the power generation unit price for each generator can be calculated taking into account

According to the present invention, by analyzing the power system information and the collective energy system information, and controlling the consumption amount of power produced in the power system through the power consumption means arranged in the collective energy system, the system frequency of the power system is maintained within a predetermined range. , it provides an environment in which the frequency of the power system can be stably maintained.

In addition, the present invention controls the generator to generate heat and use it for power generation using excess power generated in the power system or excess power expected to be overproduced in the power system based on the ramp rate characteristic information of the generator. Alternatively, by controlling to adjust the heat production amount of the heat production means, the power generation efficiency and ramp rate characteristics of the generators are improved, and an environment capable of preventing a sudden change in the system frequency of the power system due to the output fluctuation of the variable power supply is provided.

In addition, the present invention provides an environment in which generators can produce power according to the demand curve of the power load even when the output of the variable power supply is sharply decreased or the power load is rapidly increased by improving the power generation efficiency and ramp rate characteristics of the generators.

In addition, the present invention compares the grid frequency of the power system with a frequency set value, and controls the amount of power supplied from the power system to the collective energy system based on the comparison result, or controls the amount of power supplied from the collective energy system to the power system By doing so, it provides an environment capable of maintaining the power supply and demand of the power system and stably maintaining the frequency of the power system.

In addition, the present invention predicts the imbalance of power supply and demand 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 rate of increase in power demand in the power system By controlling the amount of power consumption and power supply between the power system and the collective energy system compared to those of the power system, the problem of imbalance in power supply and demand in the power system is solved, and through this, an environment that can prevent deterioration of the stability of the power system is provided.

In addition, the present invention controls the power consumption and power supply between the power system and the group energy system by considering the information of the power system and the power system analysis information and the collective energy system information and the collective energy system analysis information in a complex, so that the frequency of the power system It provides an environment in which changes can be minimized and the problem of power supply and demand imbalance can be resolved.

In addition, the present invention provides an environment in which the overall energy cost of the country can be reduced by adjusting the power consumption and power supply between the power system and the collective energy system by comprehensively considering the economic feasibility of the power system and the collective energy system.

In addition, the present invention controls the power consumption and power supply between the power system and 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 where the frequency of the power system can be stably maintained.

In addition, the present invention controls the power consumption and power supply between the power system and the collective energy system based on the response amount information of the power system in order to cope with the output fluctuations of the variable power source linked to the power system. It solves the problem of imbalance of power supply and demand in the system and provides an environment in which the frequency of the power system can be stably maintained.

In addition, the present invention by controlling the amount of power consumption in the collective energy system or the amount of power supplied to the power system based on the output fluctuation of the renewable energy source linked to the power system, the power by the instantaneous output change of the renewable energy source It provides an environment in which the frequency change of the power system can be minimized and the frequency of the power system can be stably maintained by preventing the frequency change of the power system.

In addition, the present invention controls the power consumption 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 as provided to the power system. provide an environment

In addition, the present invention secures the reserve power of the power system by adjusting the output of the power consuming means disposed in the collective energy system or supplying the power produced in the collective energy system to the power system based on the reserve power information of the power system, and , it provides an environment that can stably maintain the power supply and demand of the power system.

In addition, the present invention provides a frequency tracking operation in the power system by controlling the power consumption of the power consuming means based on the power system information when the power consuming means disposed in the collective energy system consumes a part of the power generated by the base generator. It provides an environment that can solve the frequency instability of the power system by enabling the output control of a generator that cannot operate or has 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 power consuming means disposed in the collective energy system, so it controls the power supply and demand of the power system, and Unlike a generator, it provides an environment that can continuously provide the necessary reserve power to the power system.

1 is a diagram schematically illustrating an energy conversion control system of a power system and a collective energy system according to an embodiment of the present invention.
2 is a diagram schematically illustrating the configuration of a power system and a collective energy system according to an embodiment of the present invention.
3 is a block diagram showing a schematic configuration of an apparatus for controlling energy conversion of a power system and a collective energy system according to an embodiment of the present invention.
4 is a block diagram showing a schematic configuration of an apparatus for controlling energy conversion of a power system and a collective energy system according to another embodiment of the present invention.
5 is a block diagram showing a schematic configuration of an apparatus for controlling energy conversion of a power system and a collective energy system according to another embodiment of the present invention.
6 is a block diagram showing a schematic configuration of an apparatus for controlling energy conversion of a power system and a collective energy system according to another embodiment of the present invention.
7 is a flowchart schematically illustrating a process in which the energy conversion control device controls the power supply amount and the power consumption amount between the power system and the collective energy system according to the first embodiment of the present invention.
8 is a flowchart schematically illustrating a process of converting energy between a power system and a collective energy system and controlling power consumption in the collective energy system on the basis of ramp rate characteristic information of a generator according to a second embodiment of the present invention.
9 is a flowchart schematically illustrating a process of controlling energy conversion between a power system and a group energy system using a system frequency of the power system according to a third embodiment of the present invention.
10 is a flowchart schematically illustrating a process of controlling energy conversion between a power system and a group energy system using power supply and demand information of the power system according to a fourth embodiment of the present invention.
11 is a flowchart schematically illustrating a process of controlling energy conversion between the power system and the collective energy system by analyzing the economic feasibility of the electric power system and the collective energy system according to the fifth embodiment of the present invention.
12 is a flowchart schematically illustrating a process of controlling energy conversion between a power system and a collective energy system using net load information of the power system according to a sixth embodiment of the present invention.
13 is a graph showing a typical daily power demand curve in the power system.
14 is a graph illustrating a change in a net load amount due to an increase in output of a variable power supply.
15 is a flowchart schematically illustrating a process of controlling energy conversion between a power system and a collective energy system using response amount information of the power system according to a seventh embodiment of the present invention.
16 is a flowchart schematically illustrating a process of controlling energy conversion between a power system and a group energy system using reserve power information of the power system according to an eighth embodiment of the present invention.
17 is a flowchart schematically illustrating a process of controlling the energy conversion between the power system and the collective energy system so that a part of the electric power generated by the base generator responds to the change in the system frequency according to the ninth embodiment of the present invention.
18 is a graph illustrating an example of determining the priority and output distribution of generators in the order of generation cost.
19 is a graph illustrating an example of determining the priority and output distribution of generators by reflecting the constraints of the generators.
20 is a graph showing an example of determining the priority and output distribution of generators to secure the minimum reserve power.
21 is a graph illustrating an example of determining the priority and output distribution of generators by reflecting the constraints of the power system.
22 is a graph illustrating the priority and output distribution of generators when the energy conversion between the power system and the collective energy system is controlled according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. However, the present invention may be embodied in several different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

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

Here, the power system includes physically interconnected electrical facilities, ie, power generation facilities, transmission and distribution facilities, distribution facilities, and other auxiliary facilities, in order to supply electricity produced by the power plant to electricity users.

In addition, the collective energy system provides a plurality of energy (for example, heat and electricity) produced in energy production facilities such as combined heat and power plants, heat-only boilers, heat storage and resource recovery facilities to multiple users in residential/commercial or industrial complexes. including the supply 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.

At this time, the energy conversion control device of the present invention is disposed in each system of the power system and the collective energy system, or is disposed between the electric power system and the collective energy system to control the energy conversion between both systems, but the scope of the present invention is limited It is not limited by this arrangement structure.

Now, an apparatus for controlling energy conversion of a power system and a collective energy system and a method for controlling energy conversion according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 22 .

1 is a diagram schematically illustrating an energy conversion control system of a power system and a collective energy system according to an embodiment of the present invention, and FIG. 2 is a diagram briefly illustrating the configuration of a power system and a collective energy system according to an embodiment of the present invention 3 is a block diagram showing a schematic configuration of an apparatus for controlling energy conversion of a power system and a collective energy system according to an embodiment of the present invention. At this time, the apparatus 100 for controlling the energy conversion of the power system and the collective energy system shows only a schematic configuration necessary for description according to an embodiment of the present invention, but is not limited to this configuration.

1 to 3, the energy conversion control device 100 according to an embodiment of the present invention is based on the power system information or the collective energy system information between the power system 10 and the collective energy system 20. Determines the amount of energy exchange and controls the amount of energy exchange between both systems.

Here, the amount of energy exchange includes the amount of power consumed from the power system 10 to the collective energy system 20 and the amount of power supplied from the collective energy system 20 to the power system 10 . And, the power consumption includes the amount of power produced by the power system 10 supplied to and consumed by the collective energy system 20, and the amount of power supplied includes the amount of power produced by the collective energy system 20 supplied to the power system 10. do.

And, the energy conversion control apparatus 100 of the power system and the group energy system according to an embodiment of the present invention includes the power system information receiving unit 102, the collective energy system information receiving unit 104, and the energy conversion control unit 106. include

The power system information receiving unit 102 receives power system information or power system analysis information from the power system 10 or generates power system analysis information by analyzing the power system information. In this case, the power system 10 may include a base generator 12 , a frequency responsive generator 14 , a variable power source 16 , and a load 18 . The base generator 12 includes a generator whose frequency following operation cannot be performed or the frequency response speed is less than a set value in the power system 10 . And, the frequency responsive generator 14 includes a generator that performs a frequency following operation in the power system 10 and has a frequency responsive speed greater than or equal to a set value. In addition, the variable power source 16 includes a power source whose power generation is determined by an external factor or whose power production is increased or decreased.

And, the power system information and the power system analysis information are the ramp rate characteristic information of the generators 12 and 14 linked to the power system 10, frequency information of the power system 10, the power system 10 of electricity supply and demand information. In addition, power system information and power system analysis information includes net load information by the variable power source 16, response amount information by the variable power source 16, new renewable output change information linked to the power system 10, power system ( 10) includes information on the amount of reserve power, and output information of the base generator 12 linked to the power system 10 . Here, the ramp rate characteristic information is a change in generator output per minute, and includes an evaporation rate of a generator, a desensitization rate of a generator, or a speed adjustment rate of a generator.

For example, the power system information receiving unit 102 receives the frequency information of the power system 10 or the power supply and demand information of the power system 10 from the power system 10, and analyzes the received information to the energy conversion control unit ( 106) is provided.

The collective energy system information receiving unit 104 collects the collective energy system information or analyzes the collective energy system information to generate the collective energy system analysis information. Here, the collective energy system information and the collective energy system analysis information include ramp rate characteristic information of the cogeneration generator 28 disposed in the collective energy system 20, heat supply and demand information of the collective energy system 20, and availability of the heat storage tank. It includes capacity, heat demand prediction information, current heat production information, current heat consumption information, and power supply and demand information of the collective energy system (20).

At this time, the collective energy system 20 includes a heat production means 22 , a heat storage means 24 , a heat exchange means 26 , and a cogeneration generator 28 . In addition, the power consumption means of the collective energy system 20 according to an embodiment of the present invention includes a heat production means 22 , a heat storage means 24 , and a heat exchange means 26 . For example, the heat generating means 22 may include a boiler or electric heater, the heat storage means 24 may include a heat storage tank, and the like, and the heat exchange means 26 may include a heat pump, etc. The configuration is not limited thereto. In addition, the power generation means of the collective energy system 20 may include a cogeneration generator (28).

In addition, the heat supply and demand information includes heat production information of the heat production means 22 , heat storage information of the heat storage means 24 , heat exchange information of the heat exchange means 26 , and electricity production and heat production information of the cogeneration generator 28 , etc. includes In addition, the heat supply and demand information provides heat energy produced or stored in the heat production means 22, heat storage means 24, heat exchange means 26, and cogeneration generator 28 to a number of users in residential, commercial or industrial complexes. It may include heat transport information and the like.

The energy conversion control unit 106 converts energy between the power system 10 and the collective energy system 20 to consume the excess power generated in the power system 10 or the surplus power expected to be produced in excess in the power system 10 . and energy exchange. The energy conversion control unit 106 controls the amount of energy exchange between the electric power system 10 and the collective energy system 20 based on the electric power system information and the collective energy system information, or a group based on the electric power system information and the collective energy system information. Controls the amount of energy conversion in the energy system (20).

Here, the amount of energy conversion in the collective energy system 20 is the power of the collective energy system 20 by receiving excess power that is produced in excess of the electric power system 10 or the surplus power expected to be produced in excess in the electric power system 10 . Includes the amount of power consumed by the consuming means. And, the surplus power includes an amount of power obtained by subtracting the total load from the total amount of power generated when the total amount of power generated by the power system 10 is expected to exceed the total load of the power system 10 . In addition, the surplus power includes power that destabilizes the power system 10 due to variations in the output of the variable power source or constraint conditions of the power system 10 .

The energy conversion control unit 106 is based on the lamp rate characteristic information of the generators linked to the power system 10 or the ramp rate characteristic information of the cogeneration generator 28 linked to the collective energy system 20 and the power system 10 and Controls the amount of energy exchange between the collective energy system (20).

In addition, the energy conversion control unit 106 controls the power consumption of the power consuming means disposed in the collective energy system 20 based on the ramp rate characteristic information of the generators, thereby improving the ramp rate of the generators, or of the power system. The system frequency can be maintained within a predetermined range.

For example, the energy conversion control unit 106 controls the power consumption of the heat production means 22 of the collective energy system 20 based on the ramp rate characteristic information of the cogeneration generator 28, It is possible to improve the ramp rate characteristics.

In addition, the energy conversion control unit 106 may control the heat produced by the heat generating means 22 to be supplied to the cogeneration generator 28 to improve the ramp rate of the cogeneration generator 28 . And, the energy conversion control unit 106 by adjusting the heat output of the cogeneration generator 28 using the power produced in excess in the power system 10 or the surplus power expected to be produced in excess in the power system 10, the cogeneration generator It is also possible to improve the ramp rate characteristic of (28).

In addition, the energy conversion control unit 106 uses the frequency information of the power system 10 to convert the energy exchange amount between the power system 10 and the collective energy system 20 or the energy in the collective energy system 20 . control the amount Here, the frequency information includes a real-time system frequency, a predicted system frequency, a frequency change rate, or a frequency sensitivity. The frequency change rate or frequency sensitivity includes the change rate or degree of change of the system frequency with time. And, the frequency change rate may have a positive value (+) or a negative value (-). For example, a case in which the frequency change rate is positive includes a case in which the system frequency rapidly increases. And, when the frequency change rate is a negative number, it includes a case where the system frequency is sharply decreased.

Then, the energy conversion control unit 106 compares the system frequency of the power system 10 with a frequency set value. The energy conversion control unit 106 is supplied from the power system 10 to the collective energy system 20 to stably maintain the power supply and demand of the power system 10 or to maintain the system frequency of the power system 10 within a predetermined range. Controls the amount of power consumed, and controls the amount of power supplied from the collective energy system 20 to the power system 10 .

In addition, the energy conversion control unit 106 uses the power supply and demand information of the power system 10 to the amount of energy exchanged between the power system 10 and the collective energy system 20 or from the collective energy system 20 . Controls the amount of energy conversion.

Then, the energy conversion control unit 106 analyzes 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 a generator linked to the power system 10 , a sudden change in power demand of the power system 10 , or the output of the variable power source 16 linked to the power system 10 . This includes a 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 a sudden change or the like.

And, the energy conversion control unit 106 considers the heat supply and demand information of the collective energy system 20, the frequency information or the electricity supply and demand information of the power system 10 in a complex manner, the amount of heat production in the collective energy system 20 or the collective energy system The amount of heat storage in (20) is controlled.

In addition, the energy conversion control unit 106 comprehensively considers the economic feasibility of the power system 10 and the collective energy system 20 , and the power consumption and power supply amount between the power system 10 and the collective energy system 20 . to control

And, the energy conversion control unit 106 according to an embodiment of the present invention, the power generation efficiency control unit 108, the frequency comparison unit 110, the power consumption control unit 112, the power supply amount control unit 114, the power supply and demand prediction unit ( 116 ), the power supply and demand control unit 118 , the thermal conversion control unit 120 , and the economical efficiency control unit 122 .

The generation efficiency control unit 108 controls the amount of energy exchange between the power system 10 and the collective energy system 20 to improve the generation efficiency of the generator and the ramp rate characteristics of the generator, or the collective energy system ( 20), the power consumption in the collective energy system 20 is controlled based on the ramp rate characteristic information of the generator.

The power generation efficiency control unit 108 is based on the ramp rate characteristic information of the generator linked to the power system 10 or the ramp rate characteristic information of the generator linked to the collective energy system 20, the power system 10 and the collective energy system 20 ) to control the amount of energy exchange between them, or to control the amount of power consumption in the collective energy system 20 based on the ramp rate characteristic information of the generator linked to the collective energy system 20 .

For example, the power generation efficiency control unit 108 compares the ramp rate of the generator linked to the power system 10 with a ramp rate set value. And, when the ramp rate of the generator is smaller than the ramp rate set value, the power generation efficiency control unit 108 directly generates additional heat by the generator, and controls the generated heat to be used for power generation. In addition, the power generation efficiency control unit 108 controls to adjust the heat production amount of the heat production means 22 of the collective energy system 20, thereby improving the power generation efficiency of the generator, and controlling to increase the ramp rate of the generator can do.

For example, the power generation efficiency control unit 108 controls the steam generator to additionally produce heat. In addition, the power generation efficiency control unit 108 supplies the heat produced by the power consuming means linked to the power system 10 or the collective energy system 20 to the preheating line or the water supply line of the power plant to increase the temperature of the steam. , it is possible to improve the power generation efficiency and ramp rate of the steam generator.

In addition, the power generation efficiency control unit 108 controls the power generation amount of the cogeneration generator 28 or the heat production amount of the cogeneration generator 28 disposed in the collective energy system 20 based on the ramp rate characteristic information of the cogeneration generator 28. . Then, the power generation efficiency control unit 108 adjusts the power consumption of the heat generating means 22 based on the ramp rate characteristic information of the cogeneration generator 28, or the heat production amount of the cogeneration generator 28 based on the ramp rate characteristic information. Alternatively, by controlling the power generation amount to be adjusted, the power generation efficiency and ramp rate of the cogeneration generator 28 may be improved.

For example, the power generation efficiency control unit 108 compares the ramp rate of the cogeneration generator 28 with a ramp rate set value, and when the ramp rate of the cogeneration generator 28 is smaller than the ramp rate set value, the cogeneration generator 28 Additional heating is produced and controlled to be used for power generation. In addition, the power generation efficiency control unit 108 controls to provide the heat produced by the heat production means 22 disposed in the collective energy system 20 to the cogeneration generator 28, so that the power generation efficiency of the cogeneration generator 28 and the lamp rate can be improved.

As such, the present invention controls to improve the generation efficiency and ramp rate of generators using excess or surplus power of the power system, thereby preventing a sudden change in the system frequency of the power system due to the output fluctuation of the variable power supply. provide an environment

In addition, the present invention improves the power generation efficiency and ramp rate of generators, so that even when the output of the variable power supply is sharply reduced or the power load is rapidly increased, the generators produce power according to the demand curve of the power load and supply it to the power system. to provide.

The frequency comparison unit 110 compares the system frequency or frequency change rate of the power system 10 with a frequency set value, and determines the amount of energy exchange and energy conversion between the power system 10 and the collective energy system 20 . .

The power consumption control unit 112 is based on the comparison result in the frequency comparator 110, the power system to stably maintain the power supply and demand of the power system 10 and to maintain the frequency of the power system 10 within a predetermined range. From (10), the amount of power consumed to be supplied to the collective energy system (20) is determined.

The power consumption control unit 112 controls to increase the power consumption in the collective energy system 20 when the frequency change rate is greater than the set value and the system frequency rapidly increases. In addition, in the case of an emergency in which the system frequency is sharply decreased due to a generator dropout or a large-scale load surge, the power consumption control unit 112 may control to reduce the power consumption in the collective energy system 20 .

The power supply control unit 114, based on the comparison result in the frequency comparator 110, stably maintains the power supply and demand of the power system 10 and collects energy to maintain the frequency of the power system 10 within a predetermined range. The amount of power supplied from the system 20 to the power system 10 is determined.

The power supply control unit 114 controls to reduce the amount of power supplied from the collective energy system 20 to the power system 10 when the system frequency is rapidly increased because the frequency change rate is greater than the set value. In addition, in the case of an emergency in which the system frequency is sharply reduced due to generator dropout or large-scale load surge, the power supply control unit 114 can control to increase the power supply from the collective energy system 20 to the power system 10 . 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 becomes smaller than the set value and the system frequency decreases sharply, the power supply control unit 114 transmits some or all of the amount of power generated by the cogeneration generator of the collective energy system 20 to the power system ( 10) can be controlled to supply.

The power supply and demand prediction unit 116 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 . If the deviation between the power supply and power demand of the power system 10 due to the dropout of the generator, a sudden change in power demand, or a sudden change in the output change of a variable power source, the deviation between the power supply and demand exceeds the power supply set value, or It is possible to predict in advance the situation in which the system frequency changes rapidly.

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 118 is configured to use the power system ( 10) controls to convert the excess power produced in excess into thermal energy.

In addition, when the power supply in the power system 10 is less than the power demand or the power demand increase rate in the power system 10 is greater than the set value due to the power supply and demand imbalance of the power system 10, the power supply and demand control unit 118 ) can be controlled to supply the power produced by the cogeneration generator 28 disposed in the collective energy system 20 to the power system 10 . Here, the rate of increase in power demand includes a rate of change at which the load 15 or power demand of the power system 10 increases.

In addition, the heat conversion control unit 120 considers the heat supply and demand information, power system information, and power system analysis information of the collective energy system 20 in a complex manner, and calculates the amount of heat produced by the heat production means 22 of the collective energy system 20 . or control the amount of heat stored by the heat storage means 24 .

The economical efficiency control unit 122 determines the power consumption supplied from the power system 10 to the collective energy system 20 by comprehensively considering the economic feasibility of the electric power system 10 and the collective energy system 20, or The amount of power supplied from the system 20 to the power system 10 is determined. For example, the economic feasibility control unit 122 compares and analyzes the economic feasibility of the power system 10 and the collective energy system 20, and through this, determines the amount of power consumption or power supply in the direction of reducing energy costs throughout the country. can

4 is a block diagram showing a schematic configuration of an apparatus for controlling energy conversion of a power system and a collective energy system according to another embodiment of the present invention. At this time, the apparatus 100 for controlling the energy conversion of the power system and the collective energy system shows only a schematic configuration necessary for description according to an embodiment of the present invention, but is not limited to this configuration.

Referring to FIG. 4 , the energy conversion control apparatus 100 according to another embodiment of the present invention analyzes the output change of the variable power source 16 from the power system information, and based on the analyzed result, the power system 10 and Controls the amount of power consumption or power supply between the collective energy system (20). Here, the variable power source 16 includes a power source whose power generation is determined by external factors such as weather conditions or whose power production is increased or decreased.

In other words, the energy conversion control device 100 according to another embodiment of the present invention analyzes the change in power system information due to the output change of the variable power source 16 linked to the power system 10, and analyzes the result of the analysis. Controls the amount of power consumption or power supply between the power system 10 and the collective energy system 20 on the basis. Here, the change in the power system information includes a change in at least one of net load information, response amount information, and new regeneration output information.

The energy conversion control unit 106 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 energy conversion control unit 106 compares at least one of the net load amount information, the response amount information, or the output information of the renewable energy source with a set value between the power system 10 and the collective energy system 20 . Controls power consumption and power supply.

The energy conversion control unit 106 includes a net load comparison unit 124, a net load amount control unit 126, a response amount comparison unit 128, a response amount control unit 130, and a new renewable output change according to another embodiment of the present invention. A control unit 132 may be further included.

The net load comparison unit 124 calculates the net load amount of the power system 10 according to the output change of the variable power source 16 linked to the power system 10 , and predicts the change in the net load amount. The net load comparison unit 124 compares the calculated net load amount or the predicted net load amount with a net load amount set value. Here, the net load 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 net load amount control unit 126 controls the amount of power consumed by the collective energy system 20 receiving power from the electric power system 10 based on the comparison result of the net load amount comparison unit 124 .

For example, when the net load amount is less than the net load amount set value, the net load amount control unit 126 may control to increase the amount of power consumed by the collective energy system 20 . In addition, when the net load amount exceeds the net load amount set value, the net load amount control unit 126 may control to supply the electric power produced in the collective energy system 20 to the electric power system (10).

The response amount comparison unit 128 calculates the response amount of the power system 10 using the power system information, and predicts a change in the response amount. Here, the response amount information is a response amount value that can be additionally generated by generators linked to the power system in order to respond to output fluctuations of a variable power source (eg, a renewable energy source) linked to the power system 10 or the Includes a response rate at which the generator can additionally generate power in response to fluctuations in the output of the variable power source.

And, the response amount comparison unit 128 calculates the response amount of the power system 10 according to the output change of the variable power source 16 linked to the power system 10, and predicts the change in the response amount. In addition, the response amount comparator 128 calculates the amount of power additionally required in the power system 10 in order to respond to the output fluctuation of the variable power source 16 .

And, the response amount comparison unit 128 compares the calculated response amount or the predicted response amount with the amount of power additionally required for the power system 10 to respond to the output fluctuation of the variable power source 16 . In addition, the response amount comparison unit 128 may analyze the response speed that the generators can additionally generate in response to the output change of the variable power source 16 from the power system information, and compare the analyzed response speed with a set value.

The response amount control unit 130 controls the amount of power consumption or power supply between the power system 10 and the collective energy system 20 based on the comparison result of the response amount comparison unit 128 . For example, when the response amount is smaller than the amount of power additionally required for the power system 10 in order to respond to the output fluctuation of the renewable energy source, the response amount control unit 130 controls the power produced by the collective energy system 20 Control to supply to the power system (10).

In addition, when the difference between the response amount and the required generation amount is large, the response amount control unit 130 may control to increase the amount of power supplied from the collective energy system 20 to the power system 10 . And, when the response speed of the generators is slow and it is difficult to respond to the output fluctuation of the variable power source 16, the response amount control unit 130 controls to supply the power produced in the collective energy system 20 to the power system 10. can In this case, the response amount control unit 130 may control to reduce the power consumption of the power consuming means.

The renewable output change control unit 132 analyzes the output amount of the renewable energy source linked to the power system 10 and the output change of the renewable energy source. Here, the renewable energy source includes a wind power generator, a solar power generator, a geothermal generator, a fuel cell, bioenergy, and marine energy.

And, the new renewable output change control unit 132 prevents the frequency fluctuation of the power system 10 due to the output change of the renewable energy source linked to the power system 10, or the power supply and demand imbalance in the power system 10 Controls the amount of power consumption or power supply between the power system 10 and the collective energy system 20 to prevent it.

For example, the renewable output change control unit 132 controls the amount of power consumption or heat conversion in the collective energy system 20 based on the output fluctuation of the renewable energy source. In addition, the renewable output variation control unit 132 may control to supply the power produced by the cogeneration generator 28 of the collective energy system 20 to the power system 10 based on the output fluctuation of the renewable energy source. .

Therefore, the energy conversion control device 100 of the present invention is based on the output variation of the new and renewable energy source linked to the power system 10 , the power consumption amount in the collective energy system 20 or the power to the power system 10 . By controlling the consumption amount, it is possible to minimize the frequency change of the power system 10 due to the instantaneous output change of the renewable energy source.

In addition, the energy conversion control device 100 of the present invention by controlling the power consumption in the collective energy system 20 based on the output fluctuation of the renewable energy source, as a result, the output of the renewable energy source is flattened to the power system It provides the same effect as provided in (10).

5 is a block diagram showing a schematic configuration of an apparatus for controlling energy conversion of a power system and a collective energy system according to another embodiment of the present invention. At this time, the apparatus 100 for controlling the energy conversion of the power system and the collective energy system shows only a schematic configuration necessary for description according to an embodiment of the present invention, but is not limited to this configuration.

Referring to FIG. 5 , the apparatus 100 for controlling energy conversion according to another embodiment of the present invention analyzes information on the amount of reserve power and changes in the amount of reserve power of the power system 10 from the information on the power system. And, the energy conversion control device 100 controls the amount of power consumption or power supply between the power system 10 and the collective energy system 20 based on the change of the reserve power amount information and the reserve power amount of the power system 10 . Here, the reserve power information includes a frequency tracking reserve force, a frequency adjustment reserve force, a net dynamic reserve force, or a reserve force of a driving state, and the like.

The frequency tracking reserve power or frequency adjustment reserve power includes a reserve that the generators disposed in the power system 10 can increase or decrease the amount of power generation for a set time (eg, 1 second). In addition, the frequency-following reserve power includes a reserve that can automatically respond in an instant according to an automatic generation control or a frequency-following operation of a generator connected to the power system. And, the frequency adjustment reserve power includes a reserve force for responding to minute changes in demand and adjusting the system frequency.

And, the net dynamic reserve power responds instantaneously (for example, 10 seconds) to an instantaneous (for example, 10 seconds) and increases the output in preparation for a sudden decrease in frequency due to an accident such as a momentary load change or an accident such as a generator dropout. AGC) or the generator's output surplus that can automatically respond according to the governor's frequency adjustment (Governor Free) operation.

And, the reserve power of the operating state includes the reserve power that can be produced by all generators outputting an output in the power system (10).

And, the energy conversion control unit 106 compares the amount of reserve power of the electric power system 10 with the reserve force set value, and based on the comparison result, stably maintains the electric power supply and demand of the electric power system 10 or the electric power system 10 ) to control the power consumption and power supply between the power system 10 and the collective energy system 20 to maintain the frequency within a predetermined range.

For example, the energy conversion control unit 106 increases the output of the cogeneration generator 28 disposed in the group energy system 20, or the group when the amount of reserve power of the power system 10 is smaller than the set value of the reserve power. Control to increase the power consumption of the power consuming means disposed in the energy system (20).

The energy conversion control unit 106 may further include a reserve force analysis unit 134 , a reserve force comparison unit 126 , and a reserve force control unit 138 according to another embodiment of the present invention.

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

And, the reserve force comparison unit 126 compares the reserve force amount of the power system 10 with a reserve force set value.

The reserve power control unit 138 controls to secure the amount of reserve power of the power system 10 by adjusting the output of the power consuming means disposed in the collective energy system (20).

For example, when the reserve power of the power system 10 is less than the reserve power set value, the reserve power control unit 138 controls the cogeneration generator 28 disposed in the collective energy system 20 to increase the output. In addition, the reserve power control unit 138 controls to increase the amount of power consumption and heat production of the heat production means 22 disposed in the collective energy system 20 when the amount of reserve power of the power system 10 is smaller than the reserve power set value. can do.

6 is a block diagram showing a schematic configuration of an apparatus for controlling energy conversion of a power system and a collective energy system according to another embodiment of the present invention. At this time, the apparatus 100 for controlling the energy conversion of the power system and the collective energy system shows only a schematic configuration necessary for description according to an embodiment of the present invention, but is not limited to this configuration.

Referring to FIG. 6 , the energy conversion control apparatus 100 according to another embodiment of the present invention analyzes the output information of the base generator 12 linked to the power system 10 and produces it in the base generator 12 . A part of the obtained power is allocated to the power consuming means arranged in the collective energy system (20). And, the energy conversion control device 100 controls the power consumption of the power consuming means so that a part of the power generated 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 having no speed adjustment ratio (DROOP) indicating a change in the output of the generator according to a change in the frequency of the power system or the speed adjustment ratio is less than a set value. In addition, the base generator includes a generator (eg, a nuclear power generator) or a generator having a frequency response speed less than a set value (eg, a coal generator) that cannot perform frequency tracking operation in the power system.

Then, the energy conversion control unit 106 compares the grid frequency of the power system 10 with a frequency set value, and based on the comparison result, a portion of the power generated by the base generator 12 responds to the change in the grid frequency. Controls the power consumption and power supply between the power system 10 and the collective energy system (20).

The energy conversion control unit 106 may further include a power system information analysis unit 140 , a base generator output allocation unit 142 , and a base generator frequency response control unit 144 according to another embodiment of the present invention.

The power system information analysis unit 140 receives the power system information from the power system information receiver 102 and analyzes the power system information. The power system information analysis unit 140 receives frequency information of the power system 10 and power supply and demand information of the power system so that a part of the power produced by the base generator 12 responds to a change in the system frequency of the power system 10 . Analyze.

The base generator output allocator 142 receives the output information of the base generator 12 linked to the power system 10 , and uses a portion of the power produced by the base generator 12 to consume the power of the collective energy system 20 . assigned to the means.

The base generator frequency response control unit 144 controls the power consumption of the power consumption means based on the frequency comparison result so that a part of the power generated by the base generator 12 responds to the change in the system frequency.

For example, when the system frequency of the power system 10 is greater than the frequency set value, the base generator frequency response control unit 144 increases the use of the power allocated to the heat generating unit 22, the heat generating means 22 ) to increase heat production. And, when the system frequency of the power system 10 is less than the frequency set value, the base generator frequency response control unit 144 reduces the use of the power allocated to the heat generating unit 22, the heat generating means 22 can reduce heat production.

Through this, the energy conversion control device 100 of the present invention enables the output control of generators that cannot perform frequency tracking operation in the power system or generators having a low frequency response speed, thereby generating a power system using an existing base generator or variable power source. It provides an environment that can solve the frequency instability of

7 is a flowchart schematically illustrating a process in which the energy conversion control device controls the power supply amount and power consumption amount between the power system and the collective energy system according to the first embodiment of the present invention. At this time, the following flowchart will be described using the same reference numerals in connection with the configurations of FIGS. 1 to 6 .

Referring to FIG. 7 , the apparatus 100 for controlling energy conversion between the power system and the collective energy system according to the first embodiment of the present invention provides power system information from an energy management system (EMS) of the power system 10 . , and analyzes the received power system information (S102, S104).

At this time, the power system information and power system analysis information include ramp rate characteristic information of the generator linked to the power system, frequency information of the power system, power supply and demand information of the power system, and net load information by the variable power source 16 , including response amount information by the variable power source 16, new renewable output change information linked to the power system, reserve power information of the power system, or output information of the base generator linked to the power system.

And, the energy conversion control device 100 receives the collective energy system information from the energy management system (Energy Management System, EMS) of the collective energy system 20, and analyzes the received collective energy system information (S106, S108) .

At this time, the collective energy system information and the collective energy system analysis information include ramp rate characteristic information of the generator linked to the collective energy system 20, heat supply and demand information of the collective energy system 20, usable capacity of the heat storage tank, and heat demand It includes prediction information, current heat production information, current heat consumption information, and power supply and demand information of the collective energy system 20 .

In addition, the energy conversion control device 100 considers the power system information and the collective energy system information based on the power system information and the collective energy system information in a complex manner, and the energy conversion amount of the electric power system 10 and the collective energy system 20 . is determined (S110). Here, the amount of energy exchange includes the amount of power consumed from the power system 10 to the collective energy system 20 and the amount of power supplied from the collective energy system 20 to the power system 10 .

Then, the energy conversion control device 100 controls the power supply and power consumption of the power system 10 and the collective energy system 20 based on the determined amount of energy conversion (S112). At this time, the amount of power supply includes the amount of power for supplying the power produced in the collective energy system 20 to the power system 10 . And, the power consumption includes the amount of power produced by the power system 10 is supplied to the collective energy system 20 and consumed in the collective energy system 20 .

8 is a flowchart schematically illustrating a process of converting energy between a power system and a collective energy system and controlling power consumption in the collective energy system based on ramp rate characteristic information of a generator according to a second embodiment of the present invention. At this time, the following flowchart will be described using the same reference numerals in connection with the configurations of FIGS. 1 to 6 .

Referring to FIG. 8 , the apparatus 100 for controlling energy conversion of a power system and a group energy system according to a second embodiment of the present invention receives ramp rate characteristic information of a generator, and the received ramp rate characteristic information Analyze (S202, S204). Here, the ramp rate characteristic information of the generator includes the ramp rate characteristic information of the generators 12 and 14 linked to the power system 10 and the ramp rate characteristic information of the cogeneration generator 28 disposed in the collective energy system 20 . include And, the ramp rate characteristic information is a change in generator output per minute, and includes an evaporation rate of a generator, a desensitization rate of a generator, or a speed adjustment rate of a generator.

Then, the energy conversion control apparatus 100 compares the ramp rate of the generator with the ramp rate set value (S206). The ramp rate of the generator linked to the power system 10 may be compared with the ramp rate set value, or the ramp rate of the cogeneration generator 28 may be compared with the ramp rate set value.

The energy conversion control device 100 controls to adjust the power consumption and heat production of the heat generating means 22 based on the comparison result (S208). For example, the energy conversion control device 100 reduces the heat production amount of the heat production means 22 when the ramp rate of the generator connected to the power system 10 is low or the ramp rate of the cogeneration generator 28 is low. By doing so, it provides an effect of reducing the overall load of the power system 10, and as a result, provides an effect such that the ramp rate of the generator connected to the power system 10 or the ramp rate of the cogeneration generator 28 is increased.

In addition, when the ramp rate of the cogeneration generator 28 is low, the energy conversion control device 100 controls to provide the heat produced by the heat generating means 22 to the cogeneration generator 28, thereby providing the cogeneration generator 28 ) can improve the power generation efficiency and increase the ramp rate of the cogeneration generator (28).

In addition, the energy conversion control apparatus 100 may adjust the heat production amount of the generator based on the comparison result (S210). For example, when the ramp rate of the generator linked to the power system 10 is low, the energy conversion control device 100 controls the generator to directly additionally produce heat and use the generated heat for power generation, thereby generating power through the power system. It is possible to improve the power generation efficiency of the generator linked to (10) and improve the ramp rate characteristics of the generator.

In addition, when the ramp rate of the cogeneration generator 28 is small, the energy conversion control device 100 controls the cogeneration generator 28 to additionally produce heat and use the additionally produced heat for power generation, thereby generating a cogeneration generator ( 28), the power generation efficiency and ramp rate characteristics can be improved (S212).

At this time, the energy conversion control device 100 of the present invention controls the power supply and power consumption of the power system 10 and the collective energy system 20 by considering the power system information and the collective energy system information in a complex manner, The heat production amount of the heat production means 22 or the cogeneration generator 28 may be adjusted based on the ramp rate information of the generators.

As described above, the present invention controls the generator to generate heat and use it for power production using the power generated in excess in the power system or the surplus power expected to be produced in excess 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 means to be adjusted, the power generation efficiency and ramp rate characteristics of the generators are improved, and an environment capable of preventing a sudden change in the system frequency of the power system due to the output fluctuation of the variable power supply is provided.

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 supply is sharply reduced or the power load is rapidly increased, the generators generate power along the demand curve (eg, duck curve) of the power load. It provides an environment for production.

9 is a flowchart schematically illustrating a process of controlling energy conversion between a power system and a group energy system using a system frequency of the power system according to a third embodiment of the present invention. At this time, the following flowchart will be described using the same reference numerals in connection with the configurations of FIGS. 1 to 6 .

Referring to FIG. 9 , the apparatus 100 for controlling energy conversion between a power system and a collective energy system according to a third embodiment of the present invention receives power system information and analyzes the received power system information (S302, S304). . In this case, the energy conversion control apparatus 100 may analyze frequency information of the power system and predict a system frequency change due to a change in the output of the variable power supply. Here, the frequency information includes a real-time system frequency, a predicted system frequency, a frequency change rate, frequency sensitivity, and the like. And, the frequency change rate may have a positive value (+) or a negative value (-). For example, a case in which the frequency change rate is positive includes a case in which the system frequency rapidly increases. And, when the frequency change rate is a negative number, it includes a case where the system frequency is sharply decreased.

Then, the energy conversion control device 100 monitors the system frequency of the power system 10, and compares the system frequency of the power system 10 with a frequency set value (S306). Of course, the energy conversion control device 100 compares the system frequency prediction value, the frequency change rate or the frequency sensitivity with the frequency set value, and based on the comparison result at this time, the power consumption between the power system 10 and the group energy system 20 and You can control the power supply.

And, when the system frequency of the power system 10 is greater than the first frequency set value, the energy conversion control device 100 is configured to maintain the system frequency of the power system 10 within a predetermined range in the power system 10. It is decided to supply the generated power to the collective energy system 20 (S308, S310).

In addition, the energy conversion control device 100 calculates the power consumption based on the difference between the system frequency and the first frequency set value, and controls the calculated power consumption to be supplied from the power system 10 to the collective energy system 20 . do (S312). In this case, the energy conversion control device 100 may control the amount of power consumption in the collective energy system 20 by using the difference between the system frequency and the first frequency set value. For example, when the difference between the grid frequency and the first frequency set value increases, the power consumption in the collective energy system 20 may be controlled to increase.

And, the energy conversion control device 100 compares the grid frequency of the power system 10 with a second frequency set value smaller than the first frequency set value. And, when the system frequency is smaller than the second frequency set value, the energy conversion control device 100 transmits the power produced in the collective energy system 20 to the power system so that the system frequency of the power system 10 is stabilized within a predetermined range ( 10) decides to supply (S314, S316).

Then, the energy conversion control device 100 calculates the power supply amount based on the difference between the system frequency and the second frequency set value, and controls the power supply amount to be supplied from the collective energy system 20 to the power system 10 . (S318).

That is, the energy conversion control apparatus and energy conversion control method of the power system and the collective energy system according to an embodiment of the present invention is a power consuming means arranged in the collective energy system 20 based on the frequency information of the power system 10 control the operation of In addition, the energy conversion control apparatus and energy conversion control method of the power system and the collective energy system according to an embodiment of the present invention is the power consumption means of the collective energy system 20, the consumption amount of power produced in the power system (10) By adjusting and maintaining the system frequency of the power system 10 within a predetermined range, an environment in which the frequency of the power system 10 can be stably maintained is provided.

In addition, the energy conversion control apparatus 100 may control to increase the amount of power consumption in the collective energy system 20 when the system frequency rapidly increases because the frequency change rate is greater than the set value. And, in the case of an emergency in which the system frequency is sharply reduced due to generator dropout or large-scale load surge, the energy conversion control device 100 may control to reduce the power consumption in the collective energy system 20 . Here, the frequency change rate may have a positive value (+) or a negative value (-). For example, a case in which the frequency change rate is positive includes a case in which the system frequency rapidly increases. And, when the frequency change rate is a negative number, it includes a case where the system frequency is sharply decreased.

Similarly, the energy conversion control device 100 is to reduce the amount of power supply from the collective energy system 20 to the power system 10 when the frequency change rate is greater than the set value and the system frequency of the power system 10 rapidly increases. can be controlled In addition, in the case of an emergency in which the system frequency is sharply decreased due to generator dropout or large-scale load surge, the energy conversion control device 100 controls to increase the amount of power supplied from the collective energy system 20 to the power system 10 . may be

In other words, when the grid frequency increases due to an increase in the amount of power generation in the electric power system 10 , the electric power consumption of the collective energy system 20 may be increased to lower the grid frequency of the electric power system 10 . In addition, when the power generation amount of the power system 10 is reduced and the system frequency is reduced, the power consumption of the collective energy system 20 is reduced, or the power produced in the collective energy system 20 is transferred to the power system 10 . It provides an environment in which the system frequency of the power system 10 can be increased.

10 is a flowchart schematically illustrating a process of controlling energy conversion between a power system and a collective energy system using power supply and demand information of the power system according to a fourth embodiment of the present invention. At this time, the following flowchart will be described using the same reference numerals in connection with the configurations of FIGS. 1 to 6 .

Referring to FIG. 10 , the apparatus 100 for controlling energy conversion between a power system and a collective energy system according to a fourth embodiment of the present invention receives power system information and analyzes the received power system information (S402, S404) .

At this time, the energy conversion control apparatus 100 may analyze the power supply and demand information of the power system 10 and predict the power supply/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 a generator linked to the power system 10 , a sudden change in power demand of the power system 10 , or the output of the variable power source 16 linked to the power system 10 . This includes a 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 a 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 energy conversion control device 100 is expected to be overproduced or overproduced in the power system 10 . Control to supply the surplus power to the collective energy system 20 (S408, S410).

For example, the power consuming means disposed in the collective energy system 20 is excessively produced in the power system 10 or excess in the power system 10 so as to stably maintain the power supply and demand of the power system 10 . The surplus power expected to be produced is supplied and converted into thermal energy (S412).

In addition, when the power supply in the power system 10 is smaller than the power demand due to the power supply and demand imbalance of the power system 10, the energy conversion control device 100 converts the power produced in the collective energy system 20 to the power system ( 10) to control the supply to (S414).

For example, the energy conversion control device 100 additionally produces power from the cogeneration generator 28 of the collective energy system 20 so as to stably maintain the power supply and demand of the power system 10, and the generated power is supplied to the power system 10 (S416).

11 is a flowchart schematically illustrating a process of controlling energy conversion between the power system and the collective energy system by analyzing the economic feasibility of the electric power system and the collective energy system according to the fifth embodiment of the present invention. At this time, the following flowchart will be described using the same reference numerals in connection with the configurations of FIGS. 1 to 6 .

Referring to FIG. 11 , the apparatus 100 for controlling energy conversion between a power system and a collective energy system according to a fifth embodiment of the present invention receives power system information, and analyzes the economic feasibility of the power system using the received power system information (S502, S504).

Then, the energy conversion control device 100 receives the collective energy system information, and analyzes the economic feasibility of the collective energy system 20 using the collective energy system information (S506, S508). At this time, the economic feasibility of the electric power system and the economic feasibility of the collective energy system are calculated in consideration of the unit cost of power generation and the unit cost of heat conversion by generators arranged in each system.

And, the energy conversion control device 100 compares the economic feasibility of the electric power system and the collective energy system, and based on the comparison result, the power consumption and the collective energy system supplied from the electric power system 10 to the collective energy system 20 Controls the amount of power supplied to the power system 10 from (20) (S510, S512).

For example, in the energy conversion control device 100 of the present invention, the stability of the power system 10 and the collective energy system 20 is a constraint, and the stability of the power system 10 and the collective energy system 20 is When it is satisfied, energy conversion between both systems can be controlled in consideration of the economic feasibility of the power system 10 and the economic feasibility of the collective energy system 20 .

At this time, the energy conversion control apparatus 100 of the present invention controls the amount of power consumption or the amount of power supplied in a direction to reduce energy costs as a whole country. For example, in the energy conversion control device 100 , the unit cost of power generation of the power system 10 is higher than the unit cost of generation of the collective energy system 20 , so that the economic efficiency of the power system 10 is smaller than that of the collective energy system 20 . In this case, it is possible to increase the amount of power produced in the collective energy system 20 , and control to supply the power produced in the collective energy system 20 to the power system 10 .

In addition, when the unit cost of power generation of the power system 10 is lower than the unit cost of generation of the collective energy system 20 , the economic efficiency of the power system 10 is greater than that of the collective energy system 20 , the power in the power system 10 . It can be controlled to increase production. Of course, when the stability of the power system 10 is required due to an increase in the amount of power produced in the power system 10, the energy conversion control device 100 of the present invention converts the power produced in the power system 10 to the collective energy system. It can also be controlled to supply to (20).

12 is a flowchart schematically illustrating a process of controlling energy conversion between a power system and a collective energy system using net load information of the power system according to a sixth embodiment of the present invention. At this time, the following flowchart will be described using the same reference numerals in connection with the configurations of FIGS. 1 to 6 .

Referring to FIG. 12 , an apparatus 100 for controlling energy conversion between a power system and a collective energy system according to a sixth embodiment of the present invention receives power system information, and the power system 10 due to the variable power source 16 The output fluctuation is monitored (S602, S604). Here, the variable power source 16 includes a power source whose power generation is determined by external factors such as weather conditions or whose power production is increased or decreased.

Then, the energy conversion control device 100 calculates the net load amount of the power system 10, and predicts a change in the net load amount (S606). Here, the net load 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 energy conversion control device 100 compares the net load with the set value of the net load to control the power consumption and power supply between the power system 10 and the collective energy system 20 (S608).

For example, when the net load is smaller than the set value of the net load, the power generated in excess by the power system 10 or the surplus power expected to be overproduced in the power system 10 is supplied to the collective energy system 20. Control. And, the energy conversion control device 100 controls the amount of power consumed in the collective energy system 20 to solve the imbalance of power supply and demand of the power system 10 or to stabilize the system frequency of the power system 10 (S610, S612).

In addition, when the net load is greater than the set value of the net load, the power generated in the collective energy system 20 is controlled to be supplied to the electric power system 10 . In addition, the energy conversion control device 100 controls the amount of power supplied to the power system 10 so as to solve the imbalance between power supply and demand of the power system 10 or to stabilize the system frequency of the power system 10 (S614, S616). ).

13 is a graph showing a typical daily power demand curve in the power system, and FIG. 14 is a graph showing a change in net load due to an increase in output of a variable power supply.

13 and 14 , when the output variability of the variable power supply 16 increases, the net load is formed in the form of a duck curve. In particular, when the proportion of variable power sources (eg, new and renewable energy sources) connected to the power system 10 is increased, the power load sharply decreases after sunrise and the power load rapidly increases after sunset. It is expected that the curve will change in a pattern different from the existing electricity demand curve. In addition, when the duck-curve phenomenon intensifies, it is expected that the error in the electric power demand forecast increases and the pharmaceutical cost increases.

For example, a wind power generator, which is a renewable energy source, has an output greatly influenced by wind speed, and an output of a solar power generator is influenced by the amount of insolation of a solar module. In addition, the output of renewable energy sources such as wind power and solar power is increased during the daytime, so that the net load of the power system 10 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 power supply and demand of the power system 10, and the power system 10 There is a problem that the frequency becomes unstable.

Therefore, the energy conversion control device 100 of the present invention compares the net load with a set value to control the power consumption and power supply between the power system 10 and the collective energy system 20, thereby affecting the variable power source 16 It provides an environment in which the power supply and demand imbalance caused by this can be solved and the grid frequency of the power system 10 can be stably maintained.

15 is a flowchart schematically illustrating a process of controlling energy conversion between a power system and a group energy system using response amount information of the power system according to a seventh embodiment of the present invention. At this time, the following flowchart will be described using the same reference numerals in connection with the configurations of FIGS. 1 to 6 .

Referring to FIG. 15 , an apparatus 100 for controlling energy conversion between a power system and a group energy system according to a seventh embodiment of the present invention receives power system information, and the power system 10 due to the variable power source 16 The output fluctuation is monitored (S702, S704).

And, the energy conversion control device 100 is a response amount or response speed of the power system 10 that the generators of the power system 10 must generate according to the output change of the variable power source 16 linked to the power system 10 . is calculated (S706).

Here, the response amount includes the amount of power that the generators linked to the power system 10 can additionally generate in order to respond to output fluctuations of the variable power source (eg, renewable energy source) linked to the power system 10 . do. And, the response speed includes a generation speed at which the generators linked to the power system 10 can additionally generate power in response to an output change of the variable power source 16 linked to the power system 10. At this time, this response amount And the response speed may include information about the ramp rate (Ramp Rate) characteristic of the generator.

Then, the energy conversion control device 100 calculates the amount of power additionally required in the power system 10 to respond to the output fluctuation of the variable power source 16 , and compares the response amount with the amount of power generation required for the power system 10 . (S708).

For example, when the response amount is smaller than the amount of power generation required for the power system 10, the power produced by the cogeneration generator 28 of the collective energy system 20 is controlled to be supplied to the power system 10 (S710, S712). At this time, the energy conversion control device 100 compares the response speed with a set value, and when it is difficult to respond to the output change of the variable power source 16 because the response speed of the generators is slow, the power produced by the collective energy system 20 may be controlled to be supplied to the power system 10 . In addition, the energy conversion control device 100 controls the heat production amount of the heat production means 22 or the cogeneration generator 28 based on the response amount information of the cogeneration generator 28 disposed in the collective energy system 20, or It is also possible to control the amount of power generation of the cogeneration generator (28).

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

However, generators linked to the power system 10 have a difficulty in increasing or decreasing power production according to a sudden change in output of the variable power source 16 as described above. Therefore, a change in the output of the variable 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, when the energy conversion control device 100 of the present invention is smaller than the amount of power additionally required for the power system 10 in order to respond to the output fluctuation of the variable power source 16, the collective energy system 20 in the power system By controlling the supply of power to (10), the power supply/demand imbalance of the power system 10 is solved, and an environment in which the system frequency of the power system 10 can be stably maintained is provided.

16 is a flowchart schematically illustrating a process of controlling energy conversion between a power system and a collective energy system using reserve power information of the power system according to an eighth embodiment of the present invention. At this time, the following flowchart will be described using the same reference numerals in connection with the configurations of FIGS. 1 to 6 .

Referring to FIG. 16 , the apparatus 100 for controlling energy conversion between a power system and a group energy system according to an eighth embodiment of the present invention receives power system information and analyzes the received power system information (S802, S804) .

Then, the energy conversion control apparatus 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 reserve power includes a frequency tracking reserve force, a frequency adjustment reserve force, a net dynamic reserve force, or a reserve force in a driving state.

And, the energy conversion control device 100 compares the amount of reserve power of the electric power system 10 with a reserve force set value, and based on the comparison result, stably maintains the electric power supply and demand of the electric power system 10 or the electric power system ( The amount of energy conversion between the power system 10 and the collective energy system 20 is controlled to maintain the frequency of 10) within a predetermined range (S808).

For example, the energy conversion control device 100 controls the cogeneration generator 28 disposed in the collective energy system 20 to increase the output when the amount of reserve power of the power system 10 is smaller than the reserve power set value. (S810). And, the energy conversion control device 100 of the present invention increases the amount of power supplied to the power system 10, thereby providing an environment in which the reserve power of the power system 10 can be secured.

In addition, the energy conversion control device 100 controls to increase the amount of power consumption of the power consuming means disposed in the collective energy system 20 when the amount of reserve power of the power system 10 is smaller than the set value of the reserve power (S812) ).

For example, the energy conversion control device 100 of the present invention increases the power consumption of the power consuming means disposed in the collective energy system 20, thereby increasing the power generation amount of the generators responsive to the system frequency of the power system 10 It causes, thereby providing the effect of increasing the amount of reserve power of the power system (10).

In addition, when the energy conversion control apparatus 100 of the present invention is expected to be insufficient in the power system 10, the power consumption of the power consuming means disposed in the collective energy system 20 is increased. Then, when it is necessary to increase the reserve power of the power system 10, the power consumption of the power consuming means disposed in the collective energy system 20 is reduced or the power consumption operation is stopped. In addition, the energy conversion control apparatus 100 of the present invention may reduce the power supply from the power system 10 to the collective energy system 20 .

Through this, the present invention secures the reserve power of the power system 10 as much as the amount of power consumption of the power consuming means is reduced, or reduces the power supply from the power system 10 to the collective energy system 20 in the power system (10) provides the effect of securing the reserve power.

17 is a flowchart schematically illustrating a process of controlling energy conversion between a power system and a group energy system so that a part of the electric power generated by the base generator responds to a change in the system frequency according to the ninth embodiment of the present invention. At this time, the following flowchart will be described using the same reference numerals in connection with the configurations of FIGS. 1 to 6 .

Referring to FIG. 17 , the apparatus 100 for controlling energy conversion between the power system and the collective energy system according to the ninth embodiment of the present invention analyzes the output information of the base generator 12 linked to the power system 10, A part of the power generated by the base generator 12 is allocated to the power consuming means disposed in the collective energy system 20 (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 follow the frequency operation may include a nuclear power generator, but the protection scope of the present invention is not limited thereto. In addition, the 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.

Then, the energy conversion control device 100 analyzes the change in the grid frequency of the power system 10, compares the grid frequency with a frequency set value, and a part of the power produced by the base generator 12 is of the power system 10. Control to respond to the system frequency change (S906, S908).

For example, when the grid frequency of the power system 10 is greater than the frequency set value, the energy conversion control device 100 controls to increase the use of the power allocated to the power consumption means of the collective energy system 20 . (S910). Through this, the present invention provides an effect such that a part of the power generated by the base generator 12 responds to a change in the system frequency of the power system 10 to perform a frequency-following operation (S912).

However, when the grid frequency of the power system 10 is less than the frequency set value, the control is performed to reduce the use of the power allocated to the power consumption means of the collective energy system 20 (S914). Through this, the energy conversion control device 100 may control a part of the power generated by the base generator 12 to respond to a change in the system frequency of the power system 10 to perform a frequency tracking operation (S916).

For example, the domestic power system has the characteristic 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 frequency tracking is high, which is unfavorable in terms of maintaining frequency stability. However, in the present invention, the power consuming means disposed in the collective energy system 20 responds to a change in the system frequency of the power system 10 and consumes a portion of the power produced by the nuclear power generator, so that the nuclear power generator performs frequency tracking operation. provides the same effect.

In other words, when the energy conversion control device 100 of the present invention consumes a portion of the power generated by the base generator 12 by the power consuming means disposed in the collective energy system 20, the frequency of the power system 10 By controlling the power consumption of the power consuming means disposed in the collective energy system 20 based on the information, it is possible to control the output of a generator with a low frequency response speed or failing to perform a frequency tracking operation in the power system 10 An environment capable of resolving frequency instability of the system 10 is provided.

That is, the energy conversion control device 100 of the present invention solves the problem that the frequency of the power system 10 becomes unstable due to a nuclear power plant that cannot perform frequency tracking operation in the power system 10 or a coal generator with a low frequency response speed. It provides an environment in which

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

The generator (a) has the lowest power generation cost of generators connected to the power system, and the power generation cost increases as it goes to the generator (h). Conventionally, generators are prioritized in the order of generation with the lowest generation cost (a<b<c<d<e<f<g<h), and distribute the output.

Referring to FIG. 18 , in the case of operating the power system by prioritizing generators in the order of generation cost, generators a, b, c, d with low power generation cost are operated at maximum output throughout the day, and each time zone Only the generators (e, f, g, h) in the portion in contact with the demand curve (x) can be controlled to increase/decrease the generator output along the demand curve (x). That is, FIG. 18 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) of the dawn time as in FIG. 18 . For example, the generator (e) at this time may be a coal generator.

19 is a graph illustrating an example of determining the priority and output distribution of generators by reflecting the constraints of the generators.

Referring to FIG. 19 , 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 that the generator (f) must be turned on and the generator (e) must be turned off at dawn. In addition, when there is a constraint that the generator (e) cannot quickly turn on/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. 19 .

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

Referring to Figure 20, the existing power system must operate the generator (i), which is more expensive than the generator (h), in order to secure the minimum reserve power. In addition, in the prior art, in order to secure the reserve power of the power system, the generation amount of the generators (d, e, f, g) is constantly decoupled (d1, e1, f1, g1), and the generators (f, g, There is a difficulty in operating by evaporating (f2,g2,h2,i2) the amount of power generated by h,i).

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

Referring to FIG. 21 , in the conventional power system, the priority and output distribution of generators should be modified in consideration of constraints of the power system such as line overload, transient stability, or voltage stability.

Therefore, in the prior art, in order to solve the above constraints and stably operate the power system, the generator (k), which has the most expensive power generation unit price, is operated. And, in the existing power system, the generation amount of the generators (d, e, f, g, h) is constantly decoupled (d1, e1, f1, g1, h1), and the generators (f, g, h,i,k) must be evaporated (f2,g2,h2,i2,k2) to operate. That is, the existing power system has difficulties in operating 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 examining FIGS. 18 to 21, the existing power system satisfies the constraint of the generator and the constraint of the power system, and in order to secure the minimum reserve power of the power system, preferentially select generators with high power generation unit cost Since the ranking must be modified and operated, there is a difficulty in increasing energy costs as a whole in the country.

22 is a graph illustrating the priority and output distribution of generators when the energy conversion between the power system and the collective energy system is controlled according to an embodiment of the present invention.

Referring to FIG. 22 , the energy conversion control apparatus and energy conversion control method according to the embodiment of the present invention control the surplus power of the power system 10 to be constantly consumed through the power consumption means of the collective energy system 20 . , provides the effect of increasing the existing demand curve (x) to the same as the demand curve (y) of the present invention.

For example, the energy conversion control apparatus and the energy conversion control method according to an embodiment of the present invention control the heat production means 22 of the collective energy system 20 to constantly consume the power of the power system 10, or By controlling to supply insufficient power to the power system 10 with the power produced by the cogeneration generator 28, the power supply and demand imbalance of the power system 10 can be eliminated, and the system frequency of the power system 10 can be stably maintained. environment can be provided.

In other words, the present invention provides an environment capable of distributing the output in the order of generators having the lowest unit cost of generation, while satisfying the constraints of the generator and the constraints of the power system, and securing the minimum reserve power of the power system. And, 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 the energy cost as a whole in the country.

In addition, due to the expansion of a 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 generators, adjusts the load of the power system through the power consumption means of the collective energy system and the cogeneration generator, 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 of the stability of the power system.

In this way, the energy conversion control apparatus and energy conversion control method of the power system and the collective energy system according to an embodiment of the present invention analyze the power system information and the collective energy system information, and the power consumption means arranged in the collective energy system It provides an environment in which the frequency of the power system can be stably maintained by controlling the consumption of power produced by the power system and maintaining the system frequency of the power system within a predetermined range.

In addition, the present invention controls the generator to generate heat and use it for power generation using excess power generated in the power system or excess power expected to be overproduced in the power system based on the ramp rate characteristic information of the generator. Or, by controlling to adjust the heat production amount of the heat production means, to improve the generation efficiency and ramp rate characteristics of the generators, and provides an environment that can prevent a sudden change in the system frequency of the power system due to the output fluctuation of the variable power supply.

In addition, the present invention provides an environment in which generators can produce power according to the demand curve of the power load even when the output of the variable power supply is sharply decreased or the power load is rapidly increased by improving the power generation efficiency and ramp rate characteristics of the generators.

In addition, the present invention compares the grid frequency of the power system with the frequency set value, and controls the amount of power supplied from the power system to the collective energy system based on the comparison result, or controls the amount of power supplied from the collective energy system to the power system By doing so, it provides an environment capable of maintaining the power supply and demand of the power system and stably maintaining the frequency of the power system.

In addition, the present invention predicts the imbalance of power supply and demand 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 rate of increase in power demand in the power system By controlling the amount of power consumption and power supply between the power system and the collective energy system compared to those of the power system, the problem of imbalance in power supply and demand in the power system is solved, and through this, an environment that can prevent deterioration of the stability of the power system is provided.

In addition, the present invention controls the power consumption and power supply between the power system and the group energy system by considering the information of the power system and the power system analysis information and the collective energy system information and the collective energy system analysis information in a complex, so that the frequency of the power system It provides an environment in which changes can be minimized and the problem of power supply and demand imbalance can be resolved.

In addition, the present invention provides an environment in which the overall energy cost of the country can be reduced by adjusting the power consumption and power supply between the power system and the collective energy system by comprehensively considering the economic feasibility of the power system and the collective energy system.

In addition, the present invention controls the power consumption and power supply between the power system and 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 where the frequency of the power system can be stably maintained.

In addition, the present invention controls the power consumption and power supply between the power system and the collective energy system based on the response amount information of the power system in order to cope with the output fluctuations of the variable power source linked to the power system. It solves the problem of imbalance of power supply and demand in the system and provides an environment in which the frequency of the power system can be stably maintained.

In addition, the present invention by controlling the amount of power consumption in the collective energy system or the amount of power supplied to the power system based on the output fluctuation of the renewable energy source linked to the power system, the power by the instantaneous output change of the renewable energy source It provides an environment in which the frequency change of the power system can be minimized and the frequency of the power system can be stably maintained by preventing the frequency change of the power system.

In addition, the present invention controls the power consumption 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 as provided to the power system. provide an environment

In addition, the present invention secures the reserve power of the power system by adjusting the output of the power consuming means disposed in the collective energy system or supplying the power produced in the collective energy system to the power system based on the reserve power information of the power system, and , it provides an environment that can stably maintain the power supply and demand of the power system.

In addition, the present invention provides a frequency tracking operation in the power system by controlling the power consumption of the power consuming means based on the power system information when the power consuming means disposed in the collective energy system consumes a part of the power generated by the base generator. It provides an environment that can solve the frequency instability of the power system by enabling the output control of a generator that cannot operate or has 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 power consuming means disposed in the collective energy system, so it controls the power supply and demand of the power system, and Unlike a generator, it provides an environment that can continuously provide the necessary reserve power to the power system.

The embodiment of the present invention described above is not implemented only through the apparatus and method, but may be implemented through a program for realizing a function corresponding to the configuration of the embodiment of the present invention or a recording medium in which the program is recorded. Such a recording medium may 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 improved forms of the present invention are also provided by those skilled in the art using the basic concept of the present invention as defined in the following claims. is within the scope of the right.

Claims (5)

A power system information receiving unit for receiving reserve power information of the power system, and
Control the exchange of energy between the power system and the collective energy system to consume the power of the power system based on the reserve power information of the power system, but excessively produced power or power in the power system that destabilizes the power system An energy conversion control unit for controlling the amount of power consumption between the power system and the group energy system so that the power expected to be produced in excess in the system is consumed by the power consuming means of the collective energy system,
The energy conversion control unit,
a reserve power comparison unit that compares the reserve force amount of the power system with a reserve force set value;
Based on the comparison result, control to secure the reserve power of the power system by adjusting the output of the power consuming means disposed in the group energy system, and if the reserve power of the power system is less than the reserve power set value, the group A reserve power control unit that controls to increase the power consumption of the power consuming means disposed in the energy system, and
Control the amount of power consumption or power supply between the power system and the collective energy system using the response amount or response speed according to the change in the output of the variable power source, but more When the response amount is small or it is difficult to respond to the output fluctuation of the variable power supply because the response speed is low, the power system reserve information including a response amount control unit for controlling to reduce the power consumption amount of the power consuming means Energy conversion control device for power system and collective energy system. delete In claim 1,
The reserve force control unit,
When the amount of reserve power of the power system is smaller than the reserve power set value, the energy conversion control device of the power system and the group energy system using the reserve power information of the power system to control to adjust the output of the cogeneration generator disposed in the collective energy system. delete In claim 1,
The reserve capacity information is
An apparatus for controlling energy conversion of an electric power system and a group energy system using the reserve power information of the electric power system including at least one of a frequency tracking reserve force, a frequency adjustment reserve force, a net dynamic reserve force, or a reserve force in an operating state.

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