KR20210074664A - Review method and server of system linkage for renewable energy - Google Patents

Abstract

The present invention provides a renewable energy system linkage review method, which comprises the steps of: obtaining latitude/longitude information for the power plant from information on the power generation project application; obtaining information on distributed power generation and transmission and substation facilities in the corresponding area; obtaining system linkage reference information; preparing a list including an evaluation according to the system linkage reference information as a list of transmission and substation facilities in a corresponding area which can be linked to the power plant according to the power generation project application; and providing the prepared list to the power generation project application or the local system manager.

Description

REVIEW METHOD AND SERVER OF SYSTEM LINKAGE FOR RENEWABLE ENERGY}

The present invention relates to a new and renewable energy grid linkage review method and server, and in particular, to present a renewable energy grid linkage optimization review method and system using location-based big data.

In general, the electricity market is largely composed of a power generation company that sells electricity through the electricity market, a sales company that purchases electricity, and consumers. In Korea, power generation and sales companies can trade electricity only through the electricity market, and the Korea Electric Power Corporation is in charge of transmission, distribution and sales that supply electricity to end consumers. In other words, the current electricity trading method is to purchase electricity produced by several power plants at a wholesale price at the Korea Power Exchange, and then sell it to the general consumer at the Korea Electric Power Corporation.

Power generation by various new and renewable energies is possible, small-scale power generation companies appear, and smart grid-type microgrids that converge information and communication technologies into the electricity trading system are introduced, making it possible for consumers to purchase electricity from multiple electricity sellers. It has become possible for consumers to choose their own electricity seller.

In particular, the inflow of new and renewable energy into the power system is rapidly increasing thanks to government policies and business promotion by local governments. As of 2019, about 12 GW of renewable energy is in commercial operation in Korea, and it is expected to reach about 70 GW by 2028. The number of power plants was approximately 80,000.

However, problems with such a rapid increase are emerging. The lack of power infrastructure, substations, and transmission and distribution lines for transporting the developed renewable energy to consumers is becoming a problem. There is simply a problem with the quantity, but there are many variables from the perspective of the power grid operator, who prioritizes stable supply due to the characteristics of renewable energy with severe fluctuations in power generation.

A new and renewable energy power plant will be completed in 2-3 years at the earliest. On the other hand, substations and transmission lines for accommodating them may take 5 to 10 years to construct at the earliest, and may take longer if social consensus and acceptance are considered.

Not only the time issue but also the cost issue should be considered. According to the power supply agreement, when certain requirements are met, KEPCO must construct transmission and distribution facilities so that the cost of new and renewable power plants is connected to the grid. In particular, after the 『Unlimited access system under 1MW』 was implemented, this problem is aggravating.

In other words, while new transmission and distribution facilities are needed to accommodate renewable power plants, substations and transmission and distribution facilities are typical infrastructure of the NIMBY phenomenon. A lot of time and budget are involved in large-scale civil works and electrical work itself, aside from social costs such as civil complaints. Therefore, rational and optimal site selection logic and principles are needed from the planning stage.

Currently, when a person who wants a new and renewable power generation business applies for a power generation project through the following procedure, they obtain a power generation business license after reviewing it. Based on the acquired power generation business license and development activity permit, KEPCO is required to apply for transmission and distribution electric facilities. is the structure Applications for use are processed again according to the procedure below, and commercial operation begins after the final contract is signed.

In other words, after reviewing in the power generation business license stage, the connection plan is reviewed once more in the reviewing stage of the access method in the use application stage. The problem is that these reviews are established separately for each power generation project, and in the above review, the status of nearby power facilities and the status of new and renewable energy connected to the neighborhood are reviewed together, but large-scale new and renewable energy is waiting as it is now. The current review method has limitations in establishing an optimal long-term view from an overall perspective as it is a common occurrence nationwide.

From another point of view, renewable power plants have a considerably greater range of output fluctuations compared to existing key power plants, which puts a significant burden on system reliability. Therefore, there is a limitation in determining the location of the optimal renewable energy linkage new substation by reviewing only regionally.

Republic of Korea Registration No. 10-1569144

An object of the present invention is to provide a new and renewable energy system linkage review method/server that can suggest an optimal system plan, such as determining the location of a new substation for optimal renewable energy linkage.

Renewable energy system linkage review method according to an aspect of the present invention, the steps of obtaining latitude / longitude information about the power plant from information about the power generation business application; obtaining information on distributed power generation and transmission and substation facilities in the corresponding area; obtaining system linkage reference information; preparing a list including an evaluation according to the grid linkage reference information as a list of transmission and substation facilities in a corresponding area that can be linked to a power plant according to a power generation project application; And it may include the step of providing the created list to the power generation project applicant or the local system manager.

Here, the linkage reference information, searching for a similar actual construction case to compare; And based on the searched construction case, the installation of a new substation may be obtained as a step of determining a more economical distance reference value.

Here, in the step of obtaining latitude/longitude information for the power plant, the location of the applied power plant on a map of the corresponding area is displayed on the screen when the online application for the power generation business application is received, and the displayed location can be confirmed from the applicant.

Here, the power generation/transmission/transmission facility information of the corresponding area obtained in the step of acquiring information on the distributed power generation and transmission/transmission facilities includes information about the distributed power generation and transmission/transmission facilities in the area obtained from the server of the relevant institution. It may have been rewritten and integrated based on latitude/longitude.

Renewable energy system linkage review method according to another aspect of the present invention, the steps of obtaining latitude / longitude information about the power plant from information about the power generation business application; obtaining information on distributed power generation and transmission and substation facilities in the corresponding area; obtaining system linkage reference information; determining an optimal facility according to the grid linkage reference information among transmission and transformation facilities in a corresponding area that can link a power plant according to a power generation project application; reflecting the linkage between the determined optimal facility and the power plant according to the power generation project application to information on distributed power generation and transmission and substation facilities in the corresponding area; And it may include the step of providing the reflected information on the distributed power generation and transmission and substation facilities in the corresponding area to the system manager of the corresponding area.

Here, in the step of reflecting the information on distributed power generation and transmission/transmission facilities in the region, the capacity center point is reflected as a point where many power generation sources gather and the total capacity is large, and proposals for distributed power generation and transmission/transmission facilities in the area material can be written.

Here, the capacity center point may be determined according to the following equation.

: i번째 신재생에너지 발전원의 경도,

: i번째 신재생에너지 발전원의 위도,

: i번째 신재생에너지 발전원의 발전력,

: 하나의 『연계적합 지역』에서의 중심 경도,

: 하나의 『연계적합 지역』에서의 중심 위도)(

: The hardness of the i-th renewable energy power source,

: Latitude of the i-th renewable energy source,

: The power of the i-th renewable energy power generation source,

: central longitude in one 『connection fit area』,

: The latitude of the center in one 『connection fit area』)

Here, the step of reflecting the information on the local distributed power generation and transmission and substation facilities includes: determining the location of a new substation in the local system using a capacity center point concept that reflects the locations of power plants for multiple power generation project applications; estimating the construction cost of the new substation at the location and the cost associated with each applied power plant; And it may include the step of evaluating the economic feasibility by reflecting the construction cost and associated costs.

Renewable energy system linkage review server according to another aspect of the present invention, a data receiving unit for performing pre-processing by receiving system linkage review target data such as power generation business application information of a new power plant business applicant; a data processing unit that processes the pre-processed data in a geocoding method, determines a grid linkage standard for a new power plant, and creates a grid linkage plan; and an analysis unit that analyzes the grid linkage method evaluated according to the grid linkage standard, and configures a screen necessary for the project applicant or a grid power manager in a corresponding area of the application.

Here, the data processing unit may include: a linkage criterion determining unit that analyzes existing construction cases to determine a system linkage standard; a linkage plan creation unit that prepares grid linkage plans for the power plant applied for according to the grid linkage standard; a geocoding unit for converting addresses of information received by the data receiving unit into latitude/longitude coordinates; and a capacity center point calculation unit for calculating a capacity center point of the power generation project application area.

If the new and renewable energy system linkage review method/server of the present invention according to the above-described configuration is implemented, there is an advantage in that it is possible to prepare a new and renewable energy system linkage plan suitable for the region.

The new and renewable energy system linkage review method/server of the present invention can derive the optimal location of the substation and transmission and distribution facilities for new and renewable energy, including all of the nation's new and renewable energy generation status, and by voltage, by power source, and by region Since it is possible to check the current status by , business office, and year at a glance, it has the advantage of being highly useful in system planning and power supply and demand planning.

1 is a flowchart illustrating a method for reviewing a renewable energy system linkage according to an embodiment of the present invention.
2 is a conceptual diagram illustrating a structure for applying an existing geocoding service.
3 is a table that also implements a function of outputting the remaining capacity of new and renewable energy to the current substation through the processed information.
Figure 4a is a conceptual diagram illustrating a data collection and combination structure.
Figure 4b is a screen of QGIS representing the combined data.
Figure 5a is a reporting screen for two methods for comparison of construction costs in the case of the use of the existing facilities and the new transmission and substation facility.
Figure 5b is a reporting screen showing the cost-effectiveness analysis and economic reversal distance calculation in the case of the use of existing facilities and new transmission and substation facilities.
Fig. 6 is a table showing an embodiment of the created system linkage plan list;
7 is a screen for guiding a promising linkage method through a triangle.
8 is a flowchart illustrating a method for reviewing a renewable energy system linkage according to another embodiment of the present invention.
Figure 9a is a conceptual diagram showing the concept of connecting a small substation to a new and renewable energy dense area.
9B is a conceptual diagram illustrating a connection concept of a connection facility to a system of a renewable energy power plant or a public transmission network.
10 is a screen in which a method for partitioning the position of a quadrant, calculation of a small group capacity center point, and an expression thereof are summarized in QGIS.
11 is a screen showing a case of selection of 125 suitable areas for connection and a representative review.
12 is a reporting screen including a table showing the status in which the establishment of a new substation for linkage is determined as an economic advantage among the 『connection suitable area』.
13 is a screen for reviewing in detail by dividing into small groups.
14 is an image simulating the national change trend and the present and future by region using a heat map.
15A and 15B are heat map images that have errors due to limitations in the original function of Qgis and improved heat map images by standardizing data.
16A and 16B are screens reflected in “TOMS (Transmission Operating System)” and QGIS by additionally utilizing data on digital conversion and/or power infrastructure to QGIS and API services.
Fig. 17a is an existing base unit analysis screen, and Fig. 17b is an actual location-based analysis screen.
18 is a block diagram illustrating a new and renewable energy system linkage review server capable of performing a renewable energy system linkage review method according to the spirit of the present invention.
19 is a block diagram representing the service/task that can be performed by the renewable energy system linkage review server of FIG. 18 in association.

In describing the present invention, terms such as first, second, etc. may be used to describe various components, but the components may not be limited by the terms. The terms are only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component.

When a component is referred to as being connected or connected to another component, it may be directly connected or connected to the other component, but it can be understood that other components may exist in between. .

The terms used herein are used only to describe specific embodiments, and are not intended to limit the present invention. The singular expression may include the plural expression unless the context clearly dictates otherwise.

In this specification, the terms include or include are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, and includes one or more other features or numbers, It may be understood that the existence or addition of steps, operations, components, parts or combinations thereof is not precluded in advance.

In addition, shapes and sizes of elements in the drawings may be exaggerated for clearer description.

1 shows a method for reviewing a renewable energy system linkage according to an embodiment of the present invention. The main purpose of the illustrated system is to respond to individual new and renewable energy power generation business applications and provide necessary information.

The illustrated new and renewable energy system linkage review method includes the steps of obtaining latitude/longitude information for the power plant requested from the information on the power generation project application (S1); Reading information on distributed power generation and transmission and distribution facilities in the region (S2); reading the association reference information (S3); Creating a list including an evaluation according to the linkage reference information as a list of transmission and substation facilities in a corresponding area that can be linked to a power plant according to a power generation project application (S4); And it includes a step (S5) of providing the created list to the power generation project applicant or the local system manager.

First, let's look at the principle and process of obtaining the latitude/longitude information of the applied power plant (S1). This process can be seen as a mass address translation technology using a kind of geocoding technology.

As information about the power plant application received in step S1, the power plant project application submitted by the power plant project applicant to the system management server in the relevant area (meaning the area managed by the grid management entity having jurisdiction over the power plant application site) this can be

In order to clearly check the location of the renewable energy distributed nationwide, location information on the total number of resources is required. For versatility, latitude and longitude, which are easily understood by ordinary people, were used.

Geocoding technology is a compound word of Geographic and Coding, and refers to a system that processes and automates data that contains geographic elements or is at least closely related to geographic elements. The part applied in the present invention is a technology for converting the street name address and lot number address, which are addresses written in Korean, into latitude and longitude coordinates. A number of algorithms and programs implementing geocoding technology have been implemented, so it can be applied (coding) in various ways.

1 is a conceptual diagram illustrating a structure for applying an existing geocoding service. In the illustrated configuration, the mass data extraction work that processed the established ArcGis-based data and the geocoding work using the Naver-API service were performed concurrently, but the code was coded with Python to utilize the service of the Naver-API. indicates.

For reference, in the Naver_API service, the Korean address entered by the user is parsed through the program (text is converted into a pattern of characters that can be recognized by the computer), and when the parsed character pattern is requested to the URL service of the web, the address is In the server's database, if the request form is correct, the server sends a reply to the user. The returned information is transmitted after being converted into a unique and complex data structure called JSON. The final result can be derived by selecting the necessary elements through the Python program for the converted data and saving the selected data as an Excel file. Meanwhile, reverse geocoding, which receives latitude and longitude information and outputs a Korean address, may also be extracted in the same way.

Depending on the implementation, accurate address information for latitude and longitude may be required when processing data for issuance of land use plan confirmation agencies and mass issuance of certified copies for later activities such as field visits and site security. At the time of application, even if it is somewhat inaccurate or refers to a specific place name, the function of Reverse Geocoding (latitude and longitude → lot number) is also imposed on the latitude and longitude converted through geocoding, so that it can be implemented to generate an address list that can be searched immediately.

According to the implementation, in the step (S1) of obtaining latitude/longitude information for the power plant, when the online application for the power generation business application is received, the location of the applied power plant is displayed on the screen of the corresponding area map, and the location displayed from the applicant is confirmed can receive In this case, the device performing the step S1 may be provided with an interface means for displaying and confirming the location of the power plant to the applicant.

Next, the principle and process of performing the local power generation/transmission and substation information acquisition step (S2) of combining the location information of the local existing transmission and substation facility and the renewable power plant will be described.

Coordinate information of new and renewable energy power plants across the country confirmed by geocoding technology and location information of existing transmission and substation facilities are combined and checked at the same time to confirm the optimal location of new and renewable energy linkage substations and transmission and distribution facilities do. The method of marking on the map information can be reflected in the existing TOMS operating in-house, but due to the short period of T/F and the problem of directly applying the idea stage, QGIS, which is open as an open source, can be used first. When considering the functions of data processing and processing based on location, the QGIS base capable of statistical analysis and data extraction (Excel version) rather than the TOMS limited to the current data reading function may be suitable for the system to be built in the future. In the case of transmission and substation facilities, the SHP file, which is vector information, can be used instead of using latitude and longitude coordinate information as a location for security reasons. 2 is a scene of the data collection method of the above-described process and QGIS expressing it.

The power generation/transmission/transmission facility information of the corresponding area obtained in step S2 may be used for calculating grid linkage reference information in step S3, or may be used for reporting data or configuration of a reporting screen in step S5 of providing the linkage plan list.

The power generation/transmission/transmission facility information of the corresponding area obtained in step S2 may be rewritten by integrating information on distributed power generation and transmission/transmission facilities in the area obtained from a server of a related organization based on latitude/longitude. According to implementation, the device performing the step S2 may perform the above-described rewriting.

Next, the principle and process of the system linkage reference information acquisition step (S3) will be described. The system linkage reference information acquisition step (S3) is performed by reading the system linkage reference information recorded as the final result of performing the following process in advance, or calculating the system linkage reference information information again at the time of requesting the system linkage can be performed with

The above grid linkage reference information can be determined by introducing economic analysis comparing actual construction cases and the concept of 『Renewable Energy Linkage Appropriate Area』.

If time and budget are sufficient, such a review method or linkage criteria may be unnecessary, but in reality, time/budget is usually tight. In order to accommodate new and renewable energy into the system with limited time and resources, the optimal location selection criteria ( That is, linkage reference information) is required. The method to minimize the construction cost and social resistance is to directly link to the existing power facility or to expand the new facility in connection with the existing power facility. A function of outputting the remaining capacity of new and renewable energy to the current substation through the processed information can also be implemented, an example of which is shown in FIG. 3 .

In determining the linkage reference information, it is necessary to compare it with the case of new construction around the existing transmission and substation facilities.

In the case of a new transmission and substation facility, extreme cases such as the case in which tens of billions to hundreds of billions of won in distribution line expansion costs were calculated or executed should be excluded. To this end, we compare the construction cost of the method of withdrawing a new substation for linking new and renewable energy from a nearby transmission line and the method of withdrawing from an existing substation to a distribution line. Of course, the detailed cost of the local distribution line is not dealt with in the present specification. A comparison diagram for the two methods for the above construction cost comparison is shown in FIG. 4 .

Analyzing the actual construction construction case at the time of completion of the present invention from the above point of view, it can be confirmed that the superiority of economic efficiency is changed from the time of exceeding 10 km as shown in FIG. 5 . That is, in the step of obtaining the link reference information of the simplest implementation (S3), the link standard with the existing transmission and distribution path is determined to be 10 km. In this case, if the length of the line construction section required to connect with the existing transmission and distribution route exceeds 10 km, the establishment of a new substation will be considered.

The link reference information of the 10km length of the track construction section is only the result of the present invention proposal, which was calculated considering the conservative cost of 30% underground and 70% processing, and due to the development of construction technology and fluctuations in material/labor costs, several years have passed. At this point, it can be implemented to determine the reference information again by comparing it with similar actual construction cases again.

km 초과 지점부터 기설변전소에서 공급하는 방안보다 기설 송전선로에서 분기하여 재생에너지 연계용 신설 변전소 건설후 연계하는 것이 더 경제적으로 산출되었다. 이 경우, 상기 연계 기준정보를 직선 거리로 결정한다면, 6.5km가 될 것이다. Considering that the actual distribution line is constructed in consideration of the site conditions such as roads, the case where the 10km line distance is the most detour corresponds to a straight-line distance exceeding 6.5km. In other words,

It was more economically calculated to branch from the existing transmission line and connect after the construction of a new substation for linking renewable energy rather than supplying from an existing substation from a point exceeding km. In this case, if the linkage reference information is determined as a straight-line distance, it will be 6.5 km.

If the above-mentioned contents are summarized as performing steps, the linkage reference information in step S3 may include: searching for the most similar actual construction case to be compared; And it can be seen that the new substation installation is created as a stage of determining a more economical distance reference value based on the searched construction cases.

Next, the principle and process of creating a list of the system linkage plan (S4) will be described.

The grid linkage plan list is a list of grid linkage plans for a new power plant in the specific power generation project application received in step S1. In addition, the results of the evaluation (economical, system stability) for each system linkage method can be listed together. In addition, the system linkage method determined to be optimal as a result of the evaluation may be displayed.

6 shows an embodiment of the prepared system linkage plan list. In the illustrated list, the three nearest substations were identified and listed for the linkage between the existing substations or transmission and distribution lines and the renewable energy power plant in the vicinity of the requested power plant area. For example, this operation can be implemented through macro programming of EXCEL, and the names of the three substations can be arranged in alphabetical order to eliminate duplication and for convenient management.

Next, the principle and process of providing the system linkage method list providing step (S5) will be described.

In the step S5, the grid linkage plan list created in the step S4 may be provided to the power generation project applicant or the local grid power manager in the form of data and/or a screen organized in various ways as follows.

For project applicants who do not have a choice of linkage methods, only the most suitable linkage method can be provided. However, in the case of a new substation installation, if the completion date of the connection due to the installation of the new substation is later than the project applicant's planned completion date of the construction of the power plant, the connection method according to the installation of the new substation and the connection method to the existing distribution route may be provided together.

On the other hand, the local system manager who can select one of the linkage plans included in the linkage plan list may organize and provide the entire linkage plan list and/or promising linkage plans. 7 is a screen for guiding a promising linkage method through a triangle.

The method of deriving specific results through triangulation is a geometrically meaningful approach as it is used in precise surveys such as triangulation. The illustrated screen shows an example of a triangular area in which the three nearest substations are designated as vertices. This triangular area was referred to as the 『Renewable and Renewable Energy Linkage Appropriate Area』 and the main list was listed so that practitioners could use it for review. The range was set in the sense that it is economically cheaper to take out the distribution line from the existing substation to places closer to the existing substation, except for the triangular area of 6.5km or less, which is the linkage standard according to the straight line distance. Three substations and more than 6.5km are AND conditions, meaning that they are located in an area exceeding 6.5km from all the three nearest substations. That is, it is located at a farther distance than the existing substation by drawing it out and connecting it to the distribution line, indicating that the new construction of a new substation for connection with renewable energy is economically advantageous.

In another implementation, a list with a total capacity of 20MW or more is extracted from the 『Renewable Energy Linkage Appropriate Area』 secured as above, and examples of various types of substations for new and renewable energy linkage suitable for this are presented as review data for other purposes, etc. It is also possible to provide a list that can be differentiated by listing with reference to the fact that the distribution of renewable energy is different by region.

8 shows a method for reviewing a renewable energy system linkage according to another embodiment of the present invention. The system shown is the main purpose of providing organized/analyzed information on new and renewable energy power generation business applications for a specific area.

The illustrated renewable energy system linkage review method includes: obtaining latitude/longitude information for a power plant from information on a power generation project application (S11); Reading information on distributed power generation and transmission and distribution facilities in the region (S12); reading link reference information (S13); Determining an optimal facility according to the linkage reference information among the transmission and distribution facilities in the region that can link the power plant according to the power generation project application (S14); reflecting the linkage between the determined optimal facility and the power plant according to the application for the power generation project to information on distributed power generation and transmission and substation facilities in the corresponding area (S15); and providing (S16) the reflected information on the distributed power generation and transmission/transmission facilities in the corresponding area to the system manager of the corresponding area.

Obtaining latitude/longitude information of the applied power plant (S11), the local power generation/transmission and substation information obtaining step (S12), the linkage reference information obtaining step (S13), and the grid linkage plan list creation step (S14) is similar to the case of Embodiment 1 described above, and overlapping descriptions will be omitted. However, in the case of Example 1, a list of linkage plans for a single application for a new power plant is prepared, whereas in this embodiment, a plurality of linkage plans for a plurality of requests for a new power plant received in the region for a predetermined period of time There is a difference in how the list is written.

The principle of performing the step (S15) of reflecting the local power generation/transmission/transmission facility information and the process will be described.

In the step (S15) of reflecting in the regional power generation/transmission/transmission facility information, a capacity center point and/or a small group capacity center point may be used to establish a transmission/distribution strategy in the corresponding area.

In this case, in the step of reflecting the information on distributed power generation and transmission/transmission facilities in the region, the capacity center point is reflected as a point where many power sources are gathered and the total capacity is large, and the information on distributed power generation and transmission/transmission facilities in the area is reflected. You can write proposal materials. The above proposal data can be reflected in the new substation construction plan in the area.

If it is confirmed that new and renewable energy is to be located in a specific area, the size of each unit capacity is different even when distributed, so the public distribution required to connect each new and renewable energy depending on the location where the new substation for connection will be located The cost of the equipment will vary. In the lowest unit of power generation, there is a part that the customer from the connection point of the main distribution network to the connection point bears. 9 is a diagram illustrating a connection concept such as a connection facility to a grid or a public transmission network.

When calculating the acceptance point of such new and renewable energy, it is necessary to consider this aspect and select a point where many power generation sources are gathered in a cost-effective manner and the total capacity is large. Therefore, as a concept similar to the “load center point” used when designing power facilities for power supply in areas where power demand is expected to increase, such as housing site development, the capacity center point according to Equation 1 below is presented.

: i번째 신재생에너지 발전원의 경도,

: i번째 신재생에너지 발전원의 위도,

: i번째 신재생에너지 발전원의 발전력,

: 하나의 『연계적합 지역』에서의 중심 경도,

: 하나의 『연계적합 지역』에서의 중심 위도이다.here,

: The hardness of the i-th renewable energy power source,

: Latitude of the i-th renewable energy source,

: The power of the i-th renewable energy power generation source,

: central longitude in one 『connection fit area』,

: It is the latitude of the center in one 『joint fit area』.

The above equation calculates the latitude and longitude of the capacity center point by using the individual power generation capacity and latitude and longitude coordinates of the new and renewable energy power generation source within the "connection suitable area".

That is, in the step of reflecting the information on distributed power generation and transmission and transformation facilities in the region, the capacity center point according to Equation 1 may be used.

If implemented from the point of view of economic evaluation of new substation construction, the step of reflecting the information on distributed power generation and transmission and substation facilities in the region is a regional system using a capacity center point concept that reflects the locations of power plants for multiple power generation project applications. determining a new substation location in estimating the construction cost of the new substation at the location and the cost associated with each applied power plant; And it may include the step of evaluating the economic feasibility by reflecting the construction cost and associated costs.

Meanwhile, a method of using not only the capacity center point but also a smaller group capacity center point will be described.

와

이다. 즉, 신재생에너지의 분포현특색에 따라 해당되는 사분면의 크기가 서로 다르게 된다. 실제적으로 하나의 『연계 적합지역』내에서도 특정 사분면에 많은 수와 큰 용량의 신재생이 집결된다면 『연계 적합지역』의 중심점 보다 소그룹 중심점에 연계용 신설 변전소를 건설하는 것이 더 합리적이다라는 일반적인 생각과 같은 결과를 낼 수 있다. Reflecting the characteristics of the power system extending radially, the construction cost of the distribution trunk system that will actually be required can be calculated by dividing it into four small groups even within one 『Connecting Appropriate Area』. The center of the 4 equal parts is

Wow

to be. That is, the size of the corresponding quadrant is different according to the distribution characteristics of the renewable energy. In fact, the general idea that it is more reasonable to build a new substation for connection at the center of a small group than at the center of a suitable area for connection if a large number and large capacity of renewable energy are gathered in a specific quadrant even within one suitable area for connection. can produce the same result.

Summarizing from the point of view of economic evaluation of new substation construction, the step of reflecting the information on distributed power generation and transmission and substation facilities in the region is a regional system using the capacity center point concept that reflects the locations of power plants for multiple power generation project applications. determining a new single substation location in estimating the construction cost of a new single substation at the location and the cost associated with each applied power plant; classifying a plurality of constructable areas based on the capacity center point, and calculating a small capacity center point for each divided area; calculating construction costs when installing a small-scale substation at each of the small-scale capacity center points and costs associated with each applied power plant; And it may include the step of evaluating the economic feasibility by reflecting the construction cost and associated costs.

The principle and process of performing the step (S16) of providing information on the distributed power generation and transmission and substation facilities in the corresponding region will be described. In this step S16, it is possible to provide the administrator with various types of reporting screens meeting various purposes.

As described above, the method of partitioning the position of the quadrant and the calculation and expression of the small group capacity center point can be organized as shown in FIG. 10, and the organized screen can be provided to the system manager of the corresponding area. Although the information shown in FIG. 10 is prepared in step S15, an output screen for this is for step S16.

11 is a screen showing an example of selection and representative review of 125 suitable areas for connection, and this screen may also be provided to a system manager in the corresponding area.

In the screen shown, a total of 125 『suitable areas for linkage』 were derived as a result of deriving through the same process as above based on the amount of new and renewable energy applications nationwide through T/F activities. It can be seen that a total of 31 places were judged to be advantageous. And 7 out of 31 sites were concentrated in a specific area within one 『Connected Appropriate Area』 and divided into small groups and reviewed. As a result, for 5 places, it is more economical to separate them into two within one 『Connected Appropriate Area』. It can be concluded that .

In addition, it is possible to grasp the economical advantage of substations exclusively for renewable energy according to the underground ratio of the distribution line construction period. 12 is a table showing the status in which the establishment of a new substation for connection among “connected suitable areas” is judged to be economically superior. The illustrated table is data that can be used when determining suitability while performing the new and renewable energy system linkage review method of the present invention, but may be provided to the system manager in the corresponding area according to implementation. For example, based on the above screen, the manager may select 31 sites suitable for 70% processing standards as the subject of review for the exclusive substation in consideration of economic feasibility and acceptability.

13 shows a screen for reviewing in detail by dividing into small groups. The example shown is that the model of the dedicated substation was included in the 7 sites reviewed as the standard type (type E and type F). In the screen shown, it can be seen that the new transmission line for connection to the existing system line for the new small substation and the new distribution line from the small substation to the small group capacity center point are being reviewed in a straight line distance.

According to the above screens, the information provided to the local system manager is a kind of quantitative status. Accordingly, it may still be difficult to recognize data on the overall trend. By devising these shortcomings, it is possible to use the heat map function in Qgis to provide data that can confirm the increase trend of renewable energy nationwide, the distribution map of each region, and the increase trend. However, since the heat map in Qgis shows only the relative size, there is a part of the image that seems to be slightly distorted according to the scale, so this proposal improves this and suggests a regional expression method based on the absolute value as an idea. For example, using the heat map shown in FIG. 14 , it is possible to express an image that simulates a nationwide change trend and the present and future of each region.

QGIS is a powerful geospatial information-based application. However, there are some limitations in the “Heat Map” function, which shows the current distribution density that is focused on specific factors. It was confirmed that some errors occurred in displaying elements that are widely spread in a narrow area. As an expression of a relative value according to the scale, a representative case is that a place with a low relative density is displayed as high depending on the operation method, or a single point is displayed for items with the same latitude and longitude. Such a case may cause errors in the overall data analysis.

In the implementation of the present invention, in order to solve the above problem, it is advantageous to use a method of dividing and expressing the power generation in units of 10 kW. For example, a 100MW fuel cell in Eumseong-gun, Chungcheongbuk-do can be expressed by dividing it into 10,000 10kW power sources. Expressions can be implemented through programming. Although approximately 80,000 data were increased to 670,000, the results of analyzing the status of each city, county, etc. together with the Excel data confirm that the error due to the limitation of the original function of Qgis is largely resolved. indicates.

In addition, the QGIS and API services applied in the present invention additionally utilize data on digital conversion and/or power infrastructure, and reflect it in “TOMS (transmission operation system)” as shown in FIG. 16, and link location-based renewable energy applicable to work.

In addition, when analyzing the increasing demand for new and renewable energy-linked substations, more practical analysis is possible, thereby increasing economic efficiency and effectiveness. For example, as shown in FIG. 17 , actual location-based analysis data may be provided.

18 shows a renewable energy system linkage review server capable of performing the renewable energy system linkage review method according to the spirit of the present invention.

19 is a block diagram expressing the service/task that can be performed by the renewable energy system linkage review server of FIG. 18 in association.

Depending on the implementation, the renewable energy grid linkage review server may also perform grid power management in the corresponding area, but considering that the grid power management servers in the current area are separately constructed, grid power as shown in FIG. 18 . It is easy to implement the system in a way that is separated from the management server and cooperates with it.

The illustrated new and renewable energy system linkage review server includes: a data receiving unit 110 for receiving system linkage review target data, such as power generation business application information of a new power plant business applicant, and performing pre-processing; a data processing unit 120 for processing the preprocessed data in a geocoding method, determining a grid linkage standard for a new power plant, and creating a grid linkage plan; and an analysis unit 140 that analyzes the grid linkage method evaluated according to the grid linkage standard, and configures a screen necessary for the project applicant or a grid power manager in the application area.

The data processing unit 120 includes a linkage criterion determining unit 124 for determining a system linkage standard by analyzing existing construction cases according to the spirit of the present invention; and a linkage plan creation unit 126 for creating grid linkage plans for an applied power plant according to the grid linkage standard. In addition, a geocoding unit 122 for converting the address of the information received by the data receiving unit 110 into latitude / longitude coordinates; and a capacity center point calculation unit 128 for calculating the capacity center point of the above-described region.

The data reception unit 110 may receive the renewable energy generation project application information from the terminal 300 or the local system management server 200 of the renewable energy generation project applicant. In addition, it is possible to receive information on distributed power generation and transmission/transmission facilities in a corresponding region from the regional system management server 200 . To this end, the local system management server 200 is illustrated as having the storage devices 220 to 260 for storing the above-described information, but depending on the implementation, all or part of the storage devices 220 to 260 . may be located on a server of another external organization.

As data pre-processing performed by the data receiving unit 110 , correction of erroneous address or facility information on an application form, standardization of address or equipment description on an application form, classification of a power plant or power generation project according to an application form, etc. may be performed.

The data receiving unit 110 may perform a part of step S1 described above.

The data processing unit 120 may perform data processing such as geocoding, QGIS coding, reverse geocoding, and capacity center point calculation according to the spirit of the present invention. The data processing unit may perform a part of step S1 and step S2 described above.

The association criterion determining unit 124 determines the system association criterion by performing the above-described step S3.

The linkage plan creation unit 126 creates a list of grid linkage plans according to the spirit of the present invention, evaluates each linkage plan on the list, and determines an optimal linkage plan for power plant application.

The analysis unit 140 is a kind of reporting unit, and the list of grid linkage plans, the optimal grid linkage plan for power plant application, and the information on distributed power generation and transmission and substation facilities in the region to which the optimal grid linkage plan is applied. A screen and/or data may be generated and provided to a power plant project applicant or a local grid power manager. The reporting screen and/or data may be provided to the local grid power manager through the manager interface unit 180 .

In the case of the implementation in which the renewable energy system linkage review server 100 provides review information directly to the terminal 300 of the renewable energy power generation project applicant, the applicant interface unit 170 for providing review information to the terminal of the applicant may further include.

As shown, the new and renewable energy system linkage review server 100 can configure a new and renewable energy system linkage system together with the external local system management server 200 and the power generation project applicant terminal 300 connected thereto. have.

Those skilled in the art to which the present invention pertains should understand that the present invention can be embodied in other specific forms without changing the technical spirit or essential characteristics thereof, so the embodiments described above are illustrative in all respects and not restrictive. only do The scope of the present invention is indicated by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention. .

100: lineage review server
110: data receiving unit
120: data processing unit
122: geocoding unit
124: linkage standard determining unit
126: Linkage plan preparation department
128: capacity center point calculation unit
140: analysis unit
200: local system management server

Claims (10)

obtaining latitude/longitude information for the power plant from the information on the power generation project application;
obtaining information on distributed power generation and transmission and substation facilities in the corresponding area;
obtaining system linkage reference information;
preparing a list including an evaluation according to the grid linkage reference information as a list of transmission and substation facilities in a corresponding area that can be linked to a power plant according to a power generation project application; and
Providing the above prepared list to the power generation project applicant or the local system manager
Renewable energy system linkage review method, including.
According to claim 1,
The linkage reference information is
retrieving similar real-world construction cases to compare; and
Based on the searched construction cases, the stage of determining the distance reference value for which the installation of a new substation is more economical
Renewable energy system linkage review method, characterized in that it is obtained as
According to claim 1,
In the step of obtaining latitude/longitude information for the power plant,
When receiving the online application for the power generation project, the location of the applied power plant is displayed on the map of the area on the screen, and the location of the applied power plant is confirmed by the applicant.
According to claim 1,
The power generation/transmission/transmission facility information of the region obtained in the step of obtaining information on the distributed power generation and transmission/transmission facilities is,
Renewable energy system linkage review method, characterized in that the information on distributed power generation and transmission and substation facilities in the area acquired from the server of the relevant institution is integrated and rewritten based on latitude/longitude.
obtaining latitude/longitude information for the power plant from the information on the power generation project application;
obtaining information on distributed power generation and transmission and substation facilities in the corresponding area;
obtaining system linkage reference information;
determining an optimal facility according to the grid linkage reference information among transmission and transformation facilities in a corresponding area that can link a power plant according to a power generation project application;
reflecting the linkage between the determined optimal facility and the power plant according to the power generation project application to information on distributed power generation and transmission and substation facilities in the corresponding area; and
Providing the reflected information on the distributed power generation and transmission and substation facilities in the corresponding area to the system manager of the corresponding area
Renewable energy system linkage review method, including.
6. The method of claim 5,
In the step of reflecting the information on distributed power generation and transmission and substation facilities in the region,
Renewable energy system linkage review method that reflects the capacity center point as a point where many power generation sources gather and the total capacity is large, and prepares proposal data for distributed power generation and transmission and transformation facilities in the area
7. The method of claim 6,
The capacity center point is a renewable energy system linkage review method determined according to the following equation.

(

: The hardness of the i-th renewable energy power source,

: Latitude of the i-th renewable energy source,

: The power of the i-th renewable energy power generation source,

: central longitude in one 『connection fit area』,

: The latitude of the center in one 『connection fit area』)
7. The method of claim 6,
The step of reflecting the information on distributed power generation and transmission and substation facilities in the region is,
determining a new substation location in the local grid using the capacity center point concept reflecting the locations of power plants for multiple power generation project applications;
estimating the construction cost of the new substation at the location and the cost associated with each applied power plant; and
Evaluating economic feasibility by reflecting the construction cost and related costs
How to review the linkage of new and renewable energy systems, including
a data receiving unit that receives data subject to grid-connected review, such as power generation project application information of a new power plant project applicant, and performs pre-processing;
a data processing unit that processes the pre-processed data in a geocoding method, determines a grid linkage standard for a new power plant, and creates a grid linkage plan; and
An analysis unit that analyzes the grid linkage method evaluated according to the grid linkage standard, and configures a screen necessary for the project applicant or a grid power manager in the applied area
Renewable energy system linkage review server that includes.
The method of claim 9, wherein the data processing unit,
a linkage standard determining unit that analyzes existing construction cases to determine a grid linkage standard;
a linkage plan creation unit that prepares grid linkage plans for the power plant applied for according to the grid linkage standard;
a geocoding unit for converting addresses of information received by the data receiving unit into latitude/longitude coordinates; and
Capacity center point calculation unit for calculating the capacity center point of the power generation project application area
Renewable energy system linkage review server that includes.

Images