KR20180041782A - Effective distribution network operation method using grid acceptance information - Google Patents

Abstract

The present invention relates to a method for effectively operating consumers and a distribution system using distribution acceptability information, which allows consumers to make an efficient operation plan of distributed resources and allows a system operator to apply the plan to improve a system operation plan by exchanging information on a probability of system acceptability of the distributed resources at a specific time in the future between the system operator and the consumers. According to a desirable embodiment of the present invention, the method for effectively operating consumers and a distribution system using distribution acceptability information comprises: a step where a specific consumer associated with a distribution system transmits system acceptability information at a specific time in the future to a system operator; a step where the system operator modifies a load of the relevant system by adding load information of the distribution system and interprets the state of the system at the specific future time; a step where the system operator replies the system acceptability at the specific future time with an acceptability probability to the specific consumer; and a step where the specific consumer makes an operation plan of distributed power based on the system acceptability information transmitted from the system operator, and the operation plan is transmitted to the system operator in order to improve a system operation plan.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to an electric power distribution system,

More particularly, the present invention relates to a distributed power source or an energy management system such as a renewable power source, a generator, an energy storage device, an electric vehicle, and a demand management resource. In order to enable the efficient operation of the distributed power or energy management system at the customer side by exchanging the grid acceptance information at a certain point in the future between the customer and the system owner, And the efficient operation of the customer and the distribution system.

As well known, in order to prepare for the depletion of fossil fuels while avoiding adverse effects on the environment such as climate warming caused by the use of fossil fuels, recently, it has been proposed to use renewable resources such as solar / solar heat, wind power, hydropower, There is a tendency to gradually expand the facilities that generate (power) electricity using energy.

In the case of small-scale power generating facilities based on such renewable energy, since it is located near the power demand site, not only the demand for construction of centralized power source transmission and distribution facilities is avoided, power loss during transmission and distribution is reduced, Since the construction period is relatively short, it is possible to respond effectively to changing electric power demand.

The power generation facilities based on the new and renewable energy are a small power supply network (so-called 'Micro-Grid') for efficiently supplying power to loads as a distributed power source, away from the simple self- It is necessary to integrate the existing power supply network into the existing power supply network.

"Distributed power supply system" disclosed in Patent Registration No. 10-0501884 (registered on Jul. 07, 2005) discloses a distributed power supply system as a centralized power supply and a distributed power supply system including, for example, And power is supplied to the load on the distributed power source side.

According to the "distributed power supply system" according to the above patent, even when an accident occurs in the commercial power supply system, it is possible to stably supply high quality electric power to the load on the distributed power supply side and to operate the distributed power supply system in conjunction with the commercial power supply system Enabling the supply of valid / reactive power to the load at the same time as the commercial power system.

On the other hand, the existing distribution infrastructure inherently limits the accommodation of the distributed power source. When a plurality of distributed power sources are connected to the power distribution system, a control scheme corresponding to the connected capacity is required.

In other words, the continuous diffusion of distributed resources and energy management system to the consumers that become energy prosumer causes the difficulties of integrated forecasting and management in the grid management side, Which will be difficult to operate.

Particularly, it is difficult to control the prediction and the output because the output of the distributed resource such as the sunlight or the wind is determined according to the meteorological phenomenon. It is relatively easy to control the output of the energy storage device or the distributed generator, And the amount of output must be determined.

In general, it is assumed that, in view of the cus- tomer of the distributed resources, the autonomous operation of their own resources with the input of the electricity price or the predicted market price is assumed in order to secure the greatest economical efficiency. In this case, Based on the load forecast, the development plan of the distributed resource or the operation plan of the energy storage device is established.

However, in the case of an increase in distributed resources, the decision to operate independently of individual consumers will increase the likelihood of instability of the system, thus requiring a means of management or control thereof.

 In addition, when the operation information of the entire distributed resources is interlocked with the system operation system, it is possible to predict the problems that can occur in the operational decision stage of the customer, so that the optimal control through the avoidance of the problem is possible. In this case, a plan linked to the system operation system is needed.

In order to construct such a system, a system that can operate interoperably between a power system operating system and a customer having distributed resources is required, so that an infrastructure construction cost is excessively generated and excessive computing power is required.

According to Patent Publication No. 10-2015-0028436 (published on March 16, 2015), it is necessary to determine the capacity of the distributed power source in the distribution system and to determine the maximum connectable capacity of the bank and the distribution line specified in the technical standard Quot; distributed power supply capable capacity determining device and method "that automatically compares the capacity of a distributed power source that can be connected in the current state.

According to the apparatus and method for calculating a distributed power source capable capacity, it is possible to calculate the capacity of the newly distributed distributed power source, the capacity of the connected distributed power source, Since it is possible to reduce the number of iterative calculations and reduce the amount of calculations by providing a proportional relation between the voltage and the upper limit value before the new distributed power source is connected and by using the method of reassigning the capacity of the newly installed distributed power source, It is possible to effectively calculate the capacity that can be connected to the power supply.

However, when the output is determined based on the grid operating system as in the above-described distributed power supply link capacity determining apparatus and method, the possibility of reflecting the characteristics of individual consumers becomes more likely.

In particular, the situation of the system is constantly changing without being fixed. In order to maintain stable operation even from the perspective of the system operator, it is necessary to predict changes in the customer load including distributed resources. It is necessary to predict and operate an operational plan, but there is a lack of a system that can efficiently make information unique between the two.

Generally, the system operator holds the power usage pattern information and location information of the load (consumer), and the customer does not receive the system information but holds his load information and history pattern information. Therefore, You will have accurate information.

Therefore, a system operator can forecast a demand from an average point of view and establish a system operation plan based on the prediction result. However, if the customers operate in an unexpected direction inevitably / accidentally, a system operation problem may arise .

In order to overcome such a problem, it is necessary to combine the operation between the system operator and the customer in a tightly coupled manner and to coordinate the mutual operation plan. However, when the number of individuals participating increases, the complexity increases exponentially, Iteration 'may require a lot of effort and resources.

In particular, the system operator provides information on the grid acceptability of distributed resources linked to the customer at a certain point in the future for an individual customer so that the individual customer can efficiently manage his / It is necessary to make a plan to make it possible to establish it.

The present invention has been made in view of the circumstances of the prior art described above, and it is possible to establish an efficient operation plan of distributed resources at the customer side by exchanging system acceptance probability information of distributed resources at a certain future time point between the system operator and the customer The purpose of this study is to provide a system and method for the efficient operation of the customer and the distribution system.

In order to achieve the above object, an effective method of operating a customer and a distribution system using distributive water-solubility information according to a preferred embodiment of the present invention is characterized in that, between a system operator of a distribution system and a plurality of customers, The method comprising: a first step of delivering grid acceptance information to a grid operator at a particular point in time from a specific one of the receivers to a grid operator; A second step of adding the load information of the power distribution system based on the systematic water availability information transmitted from the system to the load of the system and interpreting the state of the system at the future specific time, The system operator returns the grid acceptance information for the specific point in time Becomes a fourth step of establishing an operating plan for the distributed power supply based on the aqueous system information from the system operator in the third stage, certain of the suyongga.

 According to the present invention, the pharmacodynamic information transmitted from the specific customer includes an acceptance probability and an electricity price / electricity price for a load / generation amount of a customer corresponding to a specific date and time in the future.

According to the present invention, the response to the grid-accepting information request provided to the specific customer from the system operator includes an acceptance range for the load / development of the corresponding customer, an acceptable probability for each range, .

Optionally, the distributed power plan of operation in the fourth step further comprises providing the grid operator with a further updated grid operation plan.

Advantageously, the first to fourth steps comprise a control to be repeated non-periodically or periodically.

According to the present invention, there is provided a system and method for operating a distribution system, the system comprising: a distribution server for distributing receivable information to a distribution center; And the system operator returns the acceptable probability of the load / generation amount of the customer to the corresponding customer, so that the customer can establish the operation plan efficiently for the resource at a certain point in the future at the customer side, The operator of the system can also receive the operational plan of the customer and utilize it to improve the system operation plan.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a functional block diagram of an apparatus for implementing an efficient operation method of a customer and a distribution system using distribution water solubility information according to a preferred embodiment of the present invention; FIG.
FIG. 2 is a flow chart for explaining an effective operation method of a customer and a distribution system using distribution water solubility information according to a preferred embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a functional block diagram of an apparatus for implementing an efficient operation method of a customer and a distribution system using distribution water-solubility information according to a preferred embodiment of the present invention.

Here, the block diagram shown in FIG. 1 is referred to merely for explaining an effective operation method of the customer and the distribution system using the distribution water-soluble information according to the present invention, and accordingly, It is not limited.

10, 10a to 10n denote receivers 10a to 10n connected to the same power network ps as the customer 10, and 10a to 10n, And the second to Nth cantilevers as other consumers referred to in the description of the system-acceptability information exchange to the second to Nth customers.

 Typically, the customer 10 includes a customer control unit 12 responsible for overall operation / control of the distributed power unit 14 based on an operational plan that includes the load / generation amount of the corresponding customer 10 .

According to the present invention, the consumer control unit 12 requests the grid operator side, which will be described later, to request the grid acceptance information for the distributed power unit 14 at a certain point in the future, and, based on the result of the response to the request, And to establish an operation plan related to the power generation of the distributed power unit 14.

Here, in the power system, there is a limitation in providing power corresponding to the load of a specific customer 10 or accepting the power generated in the customer 10, so that the system acceptability The information means that the corresponding consumer 10 can be accommodated in the distribution system if it produces or consumes a certain amount of electric power, for example, at a specific time of a specific date, for the purpose of establishing a consumption or production plan.

According to the present invention, the distributed power supply unit 14 is provided with a power generation device that generates electricity using a renewable energy source such as sunlight, wind power, or biofuel, an inverter that converts power produced by the power generation device, And an energy storage device for storing the produced electric power.

The analyzer 16 for analyzing the power consumption by the power supply load (not shown) or analyzing the power generation state of the distributed power supply 14 is included in the customer 10 and the power And a data memory 18 in which data such as a usage pattern, an electricity bill, and an operation plan of the distributed power unit 14 are stored.

1, 20 is connected via a data communication line 22 to all of the customers 10, 10a to 10n associated with the power network ps to calculate the load / generation amount of the customers 10, 10a to 10n It represents the system operator responsible for the overall operation and control of the corresponding distribution system as a basis.

In accordance with the present invention, the system operator 20 is able to control the overall control of the corresponding distribution system and the corresponding receiver (s) in response to a grid acceptance information request at a particular future time point, An operator control unit 24 for providing a response to the grid acceptance information at a specific point in time in the future, and an overall control unit 24 for controlling the overall operation of the system including the load and the generation amount of the customer 10, 10a to 10n included in the corresponding distribution system. A system analysis section 26 which is responsible for actual analysis of the operational state (i.e., analysis of the load / generation amount and fluctuation state of the customers 10, 10a to 10n) Data on the electricity rates and / or electricity prices to be applied to the customers 10, 10a to 10n, the operational plan data by the load to be transmitted and the power generation amount, the system acceptability at a certain point in time of the specific customer 10 tube And a data storage unit 28 in which stored load / generation amount information and the like are stored.

An effective operation method of the customer using the distribution water-solubility information and the distribution system according to the preferred embodiment of the present invention will be described with reference to the flow chart shown in FIG.

Generally, the system operator 20 capable of communicating data CS1 to CSn via the data communication line 22 with respect to the customer 10, 10a to 10n is connected to each customer 10, 10a, ---, 10n can be roughly predicted as to the future time of the entire load, while it is possible to accept consumption / producible power for efficient operation of the distributed resource unit 14 from the viewpoint of the customer who does not have the whole information of the corresponding system It is advantageous to receive confirmation from the opening manager 20. [

Therefore, the consumer control unit 12 on the side of the customer 10 can calculate the operating plan in consideration of the power usage pattern of the corresponding customer 10 stored in the data memory 18, the electricity price and / (Step 50).

Based on the operation plan, the customer control unit 12 of the customer 10 communicates the load of the corresponding customer 10 at a certain point in the future with the load of the distributed power supply unit 14 via the data communication line 22, (Step 52) to receive an acceptance probability in the system for the generation amount and what compensation / penalty and charge are applied to receive the reply.

On the other hand, the system operator 60 estimates the overall load and generation amount of the entire customers 10, 10a to 10n connected to the power network ps or the load and power generation amount delivered from the respective customers 10, 10a- And stores the total load and power generation amount in the data storage unit 24 (step 60).

In this state, when the grid acceptability information at a specific future time point is requested from the specific customer 10, the operator control unit 24 adds the load information of the customer 10 at step 62, Thereby modifying the overall load of the system (step 64).

Then, on the side of the system operator 20, based on the predicted result of the load of the other customers 10a to 10n or the power generation amount or the load / generation amount delivered from each of the customers 10a to 10n under the control of the operator control unit 24 And calculates the state of the bird and voltage of the system and interprets the system information in consideration of the location information of the customer 10 requesting the system acceptability information (step 66).

Based on the analysis result, the operator control unit 24 analyzes the grid acceptance probability (%) at a specific point in time of the distributed power of the specific customer 10 (step 68).

Here, the system water solubility is expressed by expressing a range of the load of the customer 10 in which the system is acceptable, an acceptable probability with respect to the load of the customer 10, and the like, ) Obtains the acceptable range for the load / development of the customer 10 and the acceptable probability for each range in consideration of the prediction information (prediction information of the entire system) of the other customers 10a to 10n from the systematic point of view And the range of the time when it becomes.

The analysis result of the system acceptability is transmitted from the operator control unit 24 to the acceptance control unit 12 of the corresponding customer 10 through the data communication line 22, The grid acceptance probability for the load and the distributed power of the corresponding customer 10, and the compensation / penalty for the electricity fee / electricity price and the case of exceeding the grid acceptability range.

If the acceptance controller 12 of the customer 10 receives a response to the pharmacodynamic acceptance information at step 54, the acceptance controller 12 determines whether the acceptance of the pharmacokinetic information based on the pharmacodynamic acceptability information provided at the operator 20 side After determining the operability of the system acceptance (step 56), the operational plan is finalized (step 58).

According to the present invention, the operation plan of the customer 10 determined and established in step 58 is transmitted to the system operator 20 via the data communication line 22 under the control of the customer control unit 12, It is possible to re-establish the operation plan with the improved and improved information on the system operator 20 side.

In this case, the system analysis unit 16 of the system operator 20 analyzes the load / power generation amount of the customer 20 and provides the analysis result to the operator control unit 24, 70, and analyzes the fluctuation of the load / power generation amount in preparation for the operation plan based on the grid acceptance information for the future specific time of the corresponding customer 20 stored in the data storage unit 28 to calculate a compensation or penalty .

Preferably, according to the present invention, the above-described process can be repeatedly performed periodically or non-periodically, so that interlinked planning operation can be performed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

For example, in the above example, when the operator 10 requests the grid acceptance information at a future time, the operator 20 estimates the load or the generation amount of the entire customer 20, 20a-20n at the future time, (20, 20a, ---, 20n) at the future point on the operator 20 side, on the contrary, by providing the system acceptability information to the future point of time And may be able to establish an operational plan for future time points in the corresponding customer.

It should be noted that the process of transmitting the system operation plan for the specific time of the future defined and established in the customer 10 described in the step 70 to the system operator 20 is not necessarily included, You can.

According to the efficient operation method of the customer and the distribution system using the distribution water-soluble information according to the present invention, the uncertainty of the production plan (or operation plan) is raised in the customer, the customer is inquired to the system operator to receive the information, And the system operator can stochastically (probability) information (for example, a certain range of information can be displayed as a percentage of the inquiry of the customer through the existing information predicted in advance) The system operator can be estimated with information from the previous year), which will help the customer. Through the information from the system operators, the customer can reduce the risk due to the wrong operation plan by establishing the operational plan (for example, changing the own plan) by judging the system acceptability when establishing the operational plan.

10, 10a to 10n: consumer, 12:
14: Distributed power section, 16: Analysis section,
18: data memory, 20: system operator,
22: data communication line, 24: operator control section,
26: system analysis section, 28: data storage section.

Claims (5)

A method for effectively operating a customer and a distribution system using distribution information, which manages the operation of load / generation of each customer between a grid operator of a distribution grid and a plurality of consumers connected to a distributed grid,
A first step of delivering grid acceptance information to a grid operator at a specific point in time at a specific one of the users;
A second step of adding load information of the power distribution system based on the systematic water availability information transmitted from the specific customer so as to modify a load of the system and interpreting the state of the system at a future specific point in time,
A third step in which the system operator returns the pharmacodynamic acceptance information for the specific time point to the specific customer based on the result of the analysis,
And a fourth step of establishing an operating plan of the distributed power supply based on the grid acceptability information from the grid operator in the specific customer. The system according to claim 1, wherein the pharmacodynamic information transmitted from the specific customer includes an acceptance probability and an electricity price / electricity price for a load / generation amount of a customer corresponding to a specific date and time in the future An effective operation method of customer and distribution system using distribution information. The system of claim 1, wherein the response from the grid operator to the grid-specific information request provided to the particular customer includes an acceptance range for the load / development of the corresponding customer, an acceptable probability for each range, And a method for effectively operating a customer and a distribution system using distribution information. The method of claim 1, wherein the distributed power plan in the fourth step is further provided to the grid operator. The method according to claim 1, wherein the first to fourth steps are performed acyclic or periodically repeatedly.

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