KR20220167420A - Method for Transformer Integrated Operating and Active System thereof - Google Patents

Abstract

A method for integrally operating a transformer using a system (1) for integrally operating an active transformer according to the present invention can manage data on the amount of changes in accordance with the amount of renewable power generation and the amount of transformer load changes to minimize loss from integral operation of a transformer by performing optimal integral transformer control (S100-S401) for determining individual transformer operation or integral transformer operation capable of minimizing loss of the transformer to output electricity based on the amount of transformer load reduction in power system data including the amount of power generation from a renewable energy power source (40-2) while a plurality of transformers (50a, 50b, 50c, 50d) connected to a power transmission line (200) and a distribution network (300) of a substation (100) are operated and in particular, can optimally calculate an integral operation period for the transformer in an optimal direction in accordance with the load amount to realize economical system operation by combining resistance loss and no-load loss of the transformer based on data on the amount of changes.

Description

Active transformer integrated operating system and method thereof {Method for Transformer Integrated Operating and Active System thereof}

The present invention relates to integrated operation of transformers, and more particularly, to a system and method for integrated operation of active transformers capable of optimally calculating the integrated operation period of transformers according to the amount of renewable generation and the amount of load reflected therein.

Globally, research on nuclear and coal phase-out and application to actual systems are actively underway, and new and renewable power sources such as solar and wind power are expanding. Renewable power sources are being linked exponentially.

In particular, when new and renewable energy sources are connected to the distribution network and generate power, they can have the same effect as reducing the load in terms of 154kV transmission lines and transformers.

Therefore, in the substation, the unnecessary loss of the transformer is reduced by performing the integrated operation of the transformer in line with the increase in renewable power through the renewable energy generation source.

This is because, unlike conventional energy sources such as thermal power, hydroelectric power, and nuclear power generators, the load of transformers in substations is directly affected by new and renewable energy sources, which cannot adjust the output as much as desired, and whose output fluctuates greatly due to new and renewable sources. because there is no choice but to

For example, the transformer integrated operation integrates and operates a plurality of transformers with a low load during a light load period when the load is light, and through this, annual cost savings of 25,000 MWh or about 2 billion won are being made.

Domestic registered patent KR 10-1658705 B

However, the transformer integrated operation method is operated as a light load response transformer integrated operation method limited to a light load period, so that it is below a certain level of the net load of the distribution line due to new and renewable energy sources such as photovoltaic power generation facilities, which are rapidly increasing recently. It is currently facing a limitation that it cannot cope with the increase in the reduction time.

In particular, considering that the increase in net load reduction time is further increased in the trend of continuously increasing the number of renewable energy generation sources connected to the distribution network, it is possible to operate the power system more stably by reducing unnecessary losses of the transformer, that is, It is required to overcome the limitations of the existing light load response type transformer integrated operation method.

Therefore, in view of the above points, the present invention manages the data of the amount of change according to the amount of new and renewable power generation and the amount of load change together with the existing energy generation source, thereby minimizing the loss of integrated operation of the transformer, so that the power system can be operated economically and rationally, In particular, the purpose is to provide an active transformer integrated operation system and method that can achieve economical system operation by combining the resistance loss and no-load loss of the transformer based on the amount of change data, thereby optimizing the calculation of the integrated operation period in the optimal direction tailored to the load amount of the transformer. there is.

The transformer integrated operation method of the present invention for achieving the above object is based on the transformer load reduction amount of the power system data including the generation amount of the renewable energy source by the integrated operation optimal control device during operation of a plurality of transformers It is characterized by including optimal control of integrated operation of transformers, which determines and outputs transformer individual operation or integrated operation of transformers capable of minimizing transformer loss.

As a preferred embodiment, the power system data is calculated by real-time summing of the generation amount of the renewable energy generation source with the generation amount of the existing energy generation source capable of adjusting the output amount of the power generation source, and the real-time sum is the transformer load reduction amount.

As a preferred embodiment, the generation amount of the renewable energy generation source is the predicted generation amount or the predicted load amount of the renewable energy generator.

As a preferred embodiment, the existing energy generation source is any one of thermal power generation, hydroelectric power generation and nuclear power generation, and the renewable energy generation source is solar power generation or wind power generation.

As a preferred embodiment, the step of optimal transformer integrated operation control calculates the transformer load reduction amount from the input power system data, and individual operation losses predicted by using a plurality of the transformers as individual operation transformers and integrated operation transformers The step of calculating each of the predicted combined operation losses, the step of checking current operation information in each of a plurality of the transformers, and the step of confirming the number of individual operation transformers as a plurality with the current operation information, in each of the plurality of individual operation transformers Determining whether the sum of the summed transformer loads is less than the maximum load of the transformers of the individual operation transformers, whether the combined operation loss is smaller than the sum of the individual operation losses when the individual operation transformers are converted into the integrated operation transformers. A step of determining, and a step of outputting the transformer individual operation or the integrated transformer operation as a result of the determination are performed.

As a preferred embodiment, the prediction of the individual operating loss and the integrated operating loss is made by calculation based on the amount of reduction in the load of the transformer, the individual operating loss is applied to one transformer, and the integrated operating loss is a combination of two transformers. applies to

As a preferred embodiment, if the individual operation transformer is not identified with the current operation information, it is determined whether the integrated operation loss is smaller than the sum of the individual operation losses when the integrated operation transformer is switched to the individual operation transformer. transition to a stage in which

As a preferred embodiment, the transformer individual operation is applied when the sum of the transformer loads is greater than the transformer maximum load, and the transformer individual operation is applied when the combined operation loss is greater than the sum of the individual operation losses.

As a preferred embodiment, the output of the integrated operation optimum control device is transmitted to a power control system, and the power control system controls each of the plurality of transformers by individual operation of the transformers or integrated operation of the transformers, and the substation in which the transformers are installed. It is a SCADA or EMS that monitors the transmission line and distribution network of

In addition, the active transformer integrated operation system of the present invention for achieving the above object is installed in a substation and transmits power from a transmission line supplying power from an existing energy generation source capable of adjusting the output of a generation source and power from a renewable energy generation source. Transformers 1, 2, 3, and 4 composed of a plurality of transformers each connected to a power supply network; Based on the transformer load reduction amount of the power system data including the generation amount of the renewable energy generation source during the operation of each of the first, second, third, and fourth transformers, individual transformer operation or combined operation of transformers capable of minimizing transformer loss is determined and output An integrated operation optimum control device that manages the amount of load supplied to the transmission line and the distribution network, and converts the operating state of the transformer to the transformer individual operation or the transformer integrated operation with the output of the integrated operation optimum control device. It is characterized in that a power control system is included.

As a preferred embodiment, the integrated operation optimum control device obtains the input unit for receiving the operating information of each of the first, second, third, and fourth transformers together with the power system data, and obtains the transformer load reduction amount from the power system data, and individually The operation loss and the integrated operation loss are calculated respectively, and the transformer individual operation and the transformer integrated operation are calculated by comparing the sum of the transformer loads for the individual operation transformers with the transformer maximum load, and the integrated operation loss is the sum of the individual operation losses It consists of an arithmetic unit that calculates the transformer individual operation and the integrated transformer operation, and a determination unit that determines and outputs a selection result of the transformer individual operation and the integrated transformer operation.

In a preferred embodiment, the input unit inputs the predicted generation amount or the predicted load amount of the generation amount of the renewable energy generation source as the power system data, and to confirm the individual operation of the transformer or the combined operation of the transformer, the first, The operation information of each of the 2, 3, and 4 transformers is input.

As a preferred embodiment, the power system data is input to the integrated operation optimum control device through a power data collection device.

As a preferred embodiment, the integrated operation of the transformers is operated by a combination of two of the first, second, third, and fourth transformers.

The active transformer integrated operation method using the active transformer integrated operation system of the present invention implements the following actions and effects.

First, integrated operation of multiple transformers can be optimized and operated with a combination of resistive loss and no-load loss. The transformer load can be reduced.

Second, economic damage of unnecessary loss accompanied by difficulties in real-time control suitable for site conditions that must occur in the integrated operation plan of adjacent transformers in a long-term unit, such as during a light load period when the transformer load is small, does not occur.

Third, data is stored and managed by monitoring the load amount for a certain period (seasonal, monthly, etc.) for new and renewable energy sources with different operating conditions from thermal power, hydroelectric power, and nuclear power generators to enable stable load supply with minimum loss. Integrated operation of multiple transformers is possible.

Fourth, the integrated operation of a plurality of transformers can prevent aging of transformer facilities by responding to the variable transformer load according to a certain period due to renewable energy generation sources, and at the same time reduce transformer losses and operate economically.

Fifth, all the disadvantages of the existing vertical and centralized integrated operation method of transformers, which are unable to manage numerous new and renewable power sources connected to the distribution network, where it is impossible to predict at what time and how much power will be generated, are all resolved. , In particular, unnecessary no-load loss can be reduced through the integrated operation of transformers at light loads due to new and renewable power generation and reduced power consumption, thereby reducing the amount of power and cost to be purchased.

1 is a flow chart of an active transformer integrated operation method according to the present invention, Figure 2 is a configuration diagram of an active transformer integrated operation system according to the present invention, Figure 3 is a transformer loss characteristic diagram for each load amount according to the present invention, Figure 4 is an example of transformer individual operation and transformer integrated operation of an active substation according to the present invention, and FIG. 5 is a transformer loss characteristic diagram for each load through integrated operation of active transformers according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying exemplary drawings, and since these embodiments can be implemented in various different forms by those skilled in the art as an example, the description herein It is not limited to the embodiment of

Referring to FIGS. 1 and 2, the transformer integrated operation method is a renewable energy generation source through the integrated operation optimal control device 10 of a plurality of transformers operated (see FIG. 4) through the transformer integrated operation optimal control (S200 to S401). Based on the power system data (S100) including the generation amount of (40-2), it is determined whether transformer individual operation or integrated transformer operation minimizes transformer loss.

To this end, the transformer integrated operation optimum control (S200 to S401) is based on the power system data (S100), the integrated operation optimum control device 10 confirms the suitable operation method of the transformer 50 (S200), and then the transformer The possibility of integrated operation considering the current operating state is determined (S300 to S302), and based on the decision, the transformer operation is determined as integrated transformer operation (S400) or transformer individual operation (S401).

Therefore, the integrated operation method of the transformer is an operation that can provide stable load supply with minimum loss by managing load amount data for a certain period (eg, seasonally, monthly, etc.) by controlling the influence of renewable energy sources that are connected to the distribution network and reduce the load of the transformer. It is characterized by an active transformer integrated operation method that can secure an optimization plan and achieves economic feasibility with reduced transformer loss while preventing deterioration of transformer facilities through this optimal operation plan.

Meanwhile, referring to FIG. 2, the active transformer integrated operation system 1 is composed of an integrated operation optimum control device 10, a power data collection device 20, and a power control system 30, thereby providing an energy generator 40 and between the transformers 50.

Specifically, the integrated operation optimum control device 10 determines the load of the transformer 50 exerted by the existing energy power generation source 40-1 and the new renewable energy power source 40-2 of the energy power generation source 40 for each predetermined period. It performs data storage and management by monitoring (eg, seasonally, monthly, etc.), analyzes and determines the optimal operation plan to enable stable load supply with minimum loss, and provides it to the transformer operator.

To this end, the integrated driving optimum control device 10 is composed of an input unit 11, a calculation unit 13, and a determination unit 15.

For example, the input unit 11 receives power system real-time data, predicted generation amount and predicted load amount of a renewable generator, and in particular, acquires current transformer operating state information of the transformer 50 . In this case, the power system real-time data includes the power of the existing energy generation source 40-1 and the renewable energy generation source 40-2 constituting the energy generation source 40, and the new and renewable generators are It means the energy generation source 40-2.

In particular, the input unit 11 includes a power generation map (not shown) of the renewable generator provided by the power data collection device 20 or the power control system 30 or rescued by itself of the input unit 11, The power generation map of the new and renewable generator is based on the predicted power generation amount extracted as a power-time diagram tailored to the characteristics of each type (eg, solar and / or wind power) of the renewable energy power source 40-2 of the energy power source 40. It is applied to confirm or calculate the predicted generation amount and the predicted load amount of the renewable generator by using the load reduction of the transformer 50 as the predicted load amount.

For example, the calculation unit 13 calculates the loss during individual operation and the loss during integrated operation of transformers in operation based on the amount of load, and for this purpose, calculation of transformer individual operation loss calculation formula (e.g., Equation 1) and transformer integrated operation loss calculation Equation (eg, Equation 2), transformer operation mode switching comparison formula (eg, Equation 3), and operation mode transformer loss comparison formula (eg, Equation 4) are respectively applied, and an arithmetic processing process is performed.

For example, the determination unit 15 outputs an optimal transformer operation plan for minimizing loss as a result of the calculation, and based on the output result, the optimal integrated operation plan determined in units of a certain period is determined by transformer individual operation or combined operation. make it possible

Specifically, the power data collection device 20 is configured with a network between the existing energy generation source 40-1 and the new and renewable energy generation source 40-2 of the energy generation source 40, so that the existing energy generation source 40-1 ) and the power system real-time data for the renewable energy power generation source 40-2 are collected and provided to the input unit 11 of the integrated operation optimum control device 10, especially for the renewable energy power source 40-2. By analyzing the existing periodic stored data for the current time, possible power generation and load prediction data are provided to the input unit 11 of the integrated operation optimum control device 10. In this case, the power data collection device 20 may be an Energy Management System (EMS) or Supervisory Control and Data Acquisition (SCADA).

Specifically, the power control system 30 is a data storage device and monitoring control device that receives output data generated by the determination unit 15 of the integrated operation optimum control device 10, and the transmission line 200 connected to the substation 100. ) and the distribution network 300 (see FIG. 4), the transformer 50 is controlled and operated in an individual operation or integrated operation method. In this case, the power control system 30 may be SCADA (Supervisory Control and Data Acquisition) or EMS (Energy Management System).

Specifically, the energy generation source 40 includes an existing energy generation source 40-1 to which thermal/hydro/nuclear power generators, etc. are applied, and a renewable energy generation source 40-2 to which solar/wind power generation is applied. . In this case, the renewable energy generation source 40-2 is composed of a plurality of first, second, and third renewable energy generation sources 40-2a, 40-2b, and 40-2c (see FIG. 4), respectively. It is connected with this transformer (50).

Specifically, the transformer 50 generates losses due to the characteristics of the transformer, and these losses include iron loss and no-load loss of mechanical loss that occur fixed regardless of the load amount, and infinite loss of copper loss and drift load loss that change according to the increase or decrease of the load amount. Separated.

In the loss characteristics of the transformer 50 of FIG. 3, it can be seen that the no-load loss shows a constant value regardless of the load amount, while the load loss increases in proportion to the square of the load amount as the load amount increases.

Therefore, for the operation of the transformer 50, the optimal transformer integrated operation method obtained through the combination of resistance loss and no-load loss can be applied in consideration of iron loss and copper loss, which are significantly larger than other losses, in determining the optimal operation plan. .

Hereinafter, the integrated operation method of the transformer will be described in detail with reference to FIGS. 2 and 4 and 5 . In this case, the control subject takes the integrated operation optimum control device 10 as the main and the power control system 20 or the power data collection device 30 as a sub, and the control target is the first, second, and third substations of the substation 100 , 4 transformers (50a, 50b, 50c, 50d) respectively.

Referring to FIG. 1 , the integrated operation optimum control device 10 performs the power system data collection or confirmation step of S100.

As shown in FIG. 2, the integrated operation optimum control device 10 transmits power system real-time data or new and renewable generators of the existing energy generation source 40-1 and the new and renewable energy generation source 40-2 through the input unit 11. The power system data step of S100 is performed by receiving the predicted generation amount and the predicted load amount of , which is performed by constructing a network of SCADA or EMS constituting the power data collection device 20.

Therefore, the real-time data of the power system is the amount of power generated by the renewable energy source 40-2 added in real time to the amount of power generated by the existing energy power source 40-1 based on thermal power, hydropower, and nuclear power that can adjust the output of the power source. It means the amount of transformer load reduction.

In particular, the power system data (S100) may reflect transformer load information based on real-time data of the current power system or based on predicted values of load and renewable energy generation, which means that the input value is the user's purpose indicates that selection is possible.

Furthermore, the integrated operation optimum control device 10 obtains current transformer operating state information of the transformer 50 through the input unit 11 and recognizes the operation method of the currently operating transformer 50 through this.

Subsequently, the integrated operation optimum control device 10 performs the transformer loss calculation step for each driving method in S200 through the calculation unit 13 receiving information from the input unit 11 as shown in FIG. 2 .

In particular, the calculation unit 13 applies the transformer individual operating loss calculation formula (eg, Equation 1) and the transformer integrated operation loss calculation formula (eg, Equation 2) to the transformer loss calculation (S200) for each operation plan, Calculate the application result.

For example, Equation 1 of the transformer individual operation loss calculation equation is applied to the first transformer 50a or the second transformer 50b as shown in FIG. 4, and thus is performed for one transformer.

Equation 1:

where is the loss of transformer A [MW], is the load of transformer A [MW], is the capacity of transformer A [MVA], is the power factor of transformer A, is the load loss of transformer A [MW], and is the no-load of transformer A is the loss [MW]. In this case, the A transformer is the first transformer 50a or the second transformer 50b.

From this, the results of individual operation losses for the first transformer 50a or the second transformer 50b are calculated.

On the other hand, Equation 2 of the transformer integrated operating loss calculation formula is applied to two transformers such as a combination of the third transformer 50c and the fourth transformer 50d as shown in FIG. 4 .

That is, Equation 2 below represents, for example, the case where two transformers A and B are individually operated, and both exist, and the case where A and B are integrated into transformer A is referred to as A'.

Equation 2:

Here, is the total loss of transformer A during integrated operation [MW], is the load of transformer A during integrated operation [MW], is the load that combines the loads of A and B transformers, and is calculated as the power factor of transformer A during integrated operation. In this case, the A and B transformers are the third transformer 50c and the fourth transformer 50d.

From this, the result of integrated operation loss for the combination of the third transformer 50c and the fourth transformer 50d is calculated.

Therefore, the transformer loss calculation for each driving plan (S200) is based on the transformer load reduction amount calculated as an input of power system data, and the individual operation loss predicted by using the plurality of transformers 50 as individual operation transformers and the integrated operation transformer Thus, the predicted combined operation loss can be calculated respectively.

Meanwhile, the integrated operation optimum control device 10 performs the current transformer individual operation confirmation step of S300, which is performed by checking the current transformer operation state information of the input unit 11 in the calculation unit 13 as shown in FIG.

Referring to FIG. 4, the substation 100 is a transformer connected to a 154 kV transmission line 200 connecting the existing energy generation source 40-1 and a distribution network 300 connecting the renewable energy generation source 40-2. (50) is installed. In this case, the substation 100 is an example configured by using the first, second, third, and fourth transformers 50a, 50b, 50c, and 50d as four banks.

Therefore, each of the first, second, third, and fourth transformers 50a, 50b, 50c, and 50d supplies the power supplied from the transmission line 200 to the load, and when supplying these loads, the distribution network 300 The power generation of the renewable generator connected to the net load is obtained.

From this, in the current transformer individual operation check (S300), operation methods for each of the first, second, third, and fourth transformers 50a, 50b, 50c, and 50d are identified.

As a result, the integrated operation optimal control device 10 enters the transformer integrated operation possibility determination step of S301 in the case of transformer individual operation, while switching to the integrated operation loss reduction determination step of S302 in the case of integrated operation rather than transformer individual operation. do.

In this way, the current transformer individual operation confirmation (S300) checks the current operation information in each of the plurality of first, second, third, and fourth transformers (50a, 50b, 50c, and 50d), and uses the current operation information to determine the number of individually operated transformers. This plurality can be identified.

In particular, in the current transformer individual operation confirmation (S300), if the individual operation transformer is not confirmed with the current operation information, it is determined whether the combined operation loss is smaller than the sum of the individual operation losses when the integrated operation transformer is converted to the individual operation transformer. It can be directly switched to the step (S302).

Subsequently, the integrated operation optimum control device 10 performs the step of calculating whether integrated operation of transformers is possible in step S301 and the step of determining loss reduction in integrated operation in S302 through the calculation unit 13 receiving information from the input unit 11 as shown in FIG. carry out

In particular, the calculation unit 13 is a transformer operation mode switching comparison formula (e.g., Equation 3) for calculating whether integrated operation of transformers is possible (S301), and a transformer loss comparison formula between operation modes (for determining integrated operation loss reduction (S302)) Yes, Equation 4) is applied, and the application result is calculated.

For example, Equation 3 of the transformer operation mode switching comparison equation is as follows.

Equation 3:

Here, is the load of transformer A, is the load of transformer B, and is the sum of the loads of transformers A and B. In this case, the A and B transformers are the third transformer 50c and the fourth transformer 50d.

From these determination results, the integrated operation optimal control device 10 enters the integrated operation loss reduction determination step of S302 when integrated operation is possible and performs loss reduction comparison according to operation, whereas if integrated operation is not possible, S401 It is converted to the individual operation output stage.

For example, Equation 4 of the transformer loss comparison equation between the operation modes is as follows.

Equation 4:

Here, is the loss of transformer A during individual operation, is the loss of transformer B during individual operation, and is the loss of transformer A during integrated operation. In this case, the A and B transformers are the third transformer 50c and the fourth transformer 50d.

Based on the determination result, the integrated operation optimum controller 10 determines whether the combined operation loss due to the combination of the third transformer 50c and the fourth transformer 50d is smaller or larger than the sum of the individual operation losses.

In this way, the calculation of whether the integrated operation of the transformers is possible (S301) and the determination of the integrated operation loss reduction (S302) may determine whether the sum of the transformer loads summed from each of the plurality of individual operation transformers is less than the maximum load of the transformers of the individual operation transformers. When converting an individual operation transformer into an integrated operation transformer, it can be determined whether the combined operation loss is smaller than the sum of the individual operation losses.

Finally, in the determination unit 15 that receives the result of the operation unit 13, the integrated operation optimum control device 10 calculates the combined operation loss due to the combination of the third transformer 50c and the fourth transformer 50d in individual operation. If it is smaller than the sum of the losses, it enters the integrated operation output stage of S400, whereas if the integrated operation loss is greater than the sum of the individual operation losses, it is converted to the individual operation output stage of S401.

Referring to FIG. 2 , the power control system 20 is a transformer according to the integrated operation output (S400) or the individual operation output (S401), which is the output data generated by the determination unit 15 of the integrated operation optimum control device 10. The operation method is output to the third transformer 50c and the fourth transformer 50d.

Referring to FIG. 5, the power control system 30 stores the resultant value of transformer individual operation and integrated transformer operation of the integrated operation optimum control device 10 and actually applies the optimal operation method to obtain the result of the transformer 5. It is a loss comparison chart during integrated operation according to the load.

As shown, the no-load loss among the transformer losses having no-load loss and load loss as the largest loss factors from the loss comparison diagram during integrated operation according to the load amount shows a constant value regardless of the load amount, while the load loss shows a constant value with increasing load amount. It can be seen that it increases in proportion to the square of the load.

However, in the case where two transformers (ie, transformers 1 and 2 (50a, 50v)) are individually operated and in the case of integrated operation (ie, transformers 3 and 4 (50c, 50d)), a certain level of In the case of individual operation according to the load, the point where the loss is reduced occurs.

Therefore, by applying the active transformer integration operation method, the no-load loss of a small load amount that exists in both the 3rd and 4th transformers 50c and 50d of the two units exists only in one unit during the integrated operation, but the no-load loss is proportional to the square of the load amount. Experimentally proves that the loss is reduced when the load is small.

From this, it is proved that the transformer loss minimization operation can be performed in the substation 100 by applying the operation plan for each period of time to the loss comparison chart during the integrated operation according to the load amount.

As described above, the transformer integrated operation method using the active transformer integrated operation system 1 according to the present embodiment includes a plurality of transformers 50a connected to the transmission line 200 and the distribution network 300 of the substation 100, respectively. , 50b, 50c, 50d), based on the amount of transformer load reduction of the power system data including the amount of power generation of the renewable energy source (40-2) during operation, by determining individual transformer operation or combined operation of transformers that can minimize transformer loss Optimum control of output transformer integrated operation (S100 to S401) is performed, thereby minimizing transformer integrated operation loss by managing change amount data according to renewable generation amount and transformer load change amount. By doing so, the calculation of the integrated operation period is optimized in the optimal direction according to the load amount of the transformer, and economical system operation can be achieved.

1: Active transformer integrated driving system
10: integrated operation optimum control device 11: input unit
13: calculation unit 15: determination unit
20: power control system 30: power data collection device
40: energy generation source 40-1: existing energy generation source
40-2: Renewable Energy Power Source
40-2a, 40-2b, 40-2c: 1st, 2nd, 3rd renewable energy generation source
50: Transformers 50a, 50b, 50c, 50d: 1st, 2nd, 3rd, 4th transformers
100: substation 200: transmission line
300: distribution network

Claims (18)

During operation of multiple transformers
Based on the amount of transformer load reduction in the power system data including the amount of power generation from renewable energy sources, the integrated operation optimal control device determines and outputs transformer individual operation or integrated transformer operation that can minimize transformer loss.
An active transformer integrated operation method comprising optimal control of integrated transformer operation.
The method according to claim 1, wherein the power system data
The amount of power generated by the new renewable energy source is calculated in real time with the amount of power generated by the existing energy source that can adjust the output of the power source,
The real-time summation is an active transformer integrated operation method, characterized in that the transformer load reduction amount.
The method according to claim 2, wherein the power generation amount of the renewable energy source is the predicted power generation amount or the predicted load amount of the renewable energy generator.
The method according to claim 2, wherein the existing energy power generation source is any one of thermal power generation, hydroelectric power generation, and nuclear power generation,
The renewable energy generation source is an active transformer integrated operation method, characterized in that solar power or wind power.
The method according to claim 1, wherein the step of optimizing integrated operation of the transformer is
Calculating the transformer load reduction amount from the inputted power system data, and calculating individual operating loss predicted by using a plurality of the transformers as individual operating transformers and integrated operating loss predicted by using integrated operating transformers, respectively;
Checking current operation information in each of the plurality of transformers, and confirming that the number of individual operation transformers is plural based on the current operation information;
Determining whether the sum of the transformer loads summed in each of the plurality of individual operation transformers is less than the maximum transformer load of the individual operation transformers;
Determining whether the integrated operation loss is smaller than the sum of the individual operation losses when the individual operation transformer is converted into the integrated operation transformer; and
Outputting the transformer individual operation or the integrated transformer operation as a result of the determination
Active transformer integrated operation method, characterized in that carried out as.
The method according to claim 5, wherein the estimation of the individual operation loss and the integrated operation loss is performed by calculation based on the amount of reduction in the transformer load.
The method according to claim 5, wherein the individual operation loss is applied to one transformer,
The integrated operation loss is an active transformer integrated operation method, characterized in that applied to a combination of two transformers.
The method according to claim 5, if the individual operation transformer is not confirmed with the current operation information,
When the integrated operation transformer is converted into the individual operation transformer, the step of determining whether the integrated operation loss is smaller than the sum of the individual operation losses.
The method of claim 5, wherein the transformer individual operation is applied when the sum of the transformer loads is greater than the maximum load of the transformers.
The method of claim 5 , wherein the integrated operation loss of the transformer is applied at a value greater than the sum of the individual operation losses.
The method according to claim 1, wherein the output of the integrated driving optimum control device is transmitted to a power control system,
The active transformer integrated operation method, characterized in that the power control system controls each of the plurality of transformers by the transformer individual operation or the transformer integrated operation.
12. The method of claim 11, wherein the power control system
An active transformer integrated operation method, characterized in that SCADA (Supervisory Control and Data Acquisition) or EMS (Energy Management System) monitoring the transmission line and distribution network of the substation in which the transformer is installed.
A plurality of transformers 1, 2, 3, and 4 installed in a substation and connected to a transmission line supplying power from an existing energy generation source capable of adjusting the output of a generation source and a distribution network supplying power from a renewable energy generation source, respectively. ;
During the operation of each of the first, second, third, and fourth transformers, based on the amount of transformer load reduction in the power system data including the generation amount of the renewable energy source, individual transformer operation or combined operation of transformers capable of minimizing transformer loss is determined and output An integrated operation optimal control device that provides
It manages the amount of load supplied to the transmission line and the distribution network, and converts the operation state of the first, second, third, and fourth transformers to the transformer individual operation or the integrated transformer operation with the output of the integrated operation optimum control device. power control system
An active transformer integrated driving system, characterized in that it is included.
The method according to claim 13, wherein the integrated driving optimum control device
An input unit for receiving operation information of each of the first, second, third, and fourth transformers together with the power system data;
The transformer load reduction amount is obtained from the power system data, individual operation loss and combined operation loss are calculated, respectively, and the sum of transformer loads for individual operation transformers is compared with the transformer maximum load to calculate the transformer individual operation and the integrated transformer operation And a calculation unit for calculating the transformer individual operation and the integrated transformer operation by comparing the integrated operation loss with the sum of the individual operation losses, and
Determination unit for determining and outputting the selection result of the individual operation of the transformer and the integrated operation of the transformer
Active transformer integrated driving system, characterized in that consisting of.
The integrated active transformer operating system according to claim 14 , wherein the predicted power generation amount or the predicted load amount for the amount of power generation of the renewable energy source is input as the power system data to the input unit.
15. The active transformer integrated operation system according to claim 14, wherein operation information of each of the first, second, third, and fourth transformers is input to the input unit to check the individual operation of the transformers or the combined operation of the transformers.
14. The active transformer integrated operation system according to claim 13, wherein the power system data is input to the integrated operation optimum control unit through a power data collection device.
The active transformer integrated operation system according to claim 13, wherein the integrated operation of the transformers is operated by a combination of two transformers among the first, second, third, and fourth transformers.

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