KR20090054256A - Coordination control system and method of upfc and switched shunt capacitor/reactor - Google Patents

Abstract

The present invention is to provide a cooperative control system and method of the UPFC and ancestor equipment, in the power system provided with the UPFC and the ancestor equipment, using the dielectric algorithm to adjust the input amount of the UPFC or the ancestor equipment of the power system By including a cooperative control system to determine, by using the genetic algorithm, which is a representative nonlinear optimization technique, it is possible to optimally determine the control value of the UPFC and the input amount of the ancestor equipment.

UPFC, ancestor equipment, cooperative control, oilfield algorithm, power system

Description

Coordination control system and method of UPFC and switched shunt capacitor / reactor

The present invention provides a technique for determining an optimal control value to enable cooperative control for ancestor facilities such as a unified power flow controller (UPFC), a condenser, and a reactor for supplying reactive power and voltage in a power system. In particular, the present invention relates to a cooperative control system and method for UPFC and ancestor equipment, which are suitable for optimally determining the control value of the UPFC and the input amount of ancestor equipment using a genetic algorithm, which is a representative nonlinear optimization technique.

In general, electric power systems are electrical connections that span a large area, including power plants, substations, and transmission lines. In the power system, reactive power is controlled to maintain a proper range of voltage. Generally, ancestor facilities such as power capacitors and reactors are widely used, but recently, cooperative control between ancestor equipment and UPFC is required due to the introduction of UPFC. have.

The UPFC (Unified Power Flow Controller) is a direct and parallel FACTS (Flexible AC Transmission System) device that can simultaneously control three variables: system voltage, active and reactive power. The UPFC is composed of inverters, which are the field of power electronics, and transformers connected to the grid. The inverters used in the UPFC are voltage type, and their output can be understood as a voltage source close to the sine wave.

In addition, phase modifying equipment refers to an electromechanical apparatus for regulating reactive power, and is a rotary equipment installed to reduce power loss. Such ancestor equipment is composed of a condenser, a reactor, and the like. In addition, the ancestor equipment is mechanically no-load operation to reduce the loss by adjusting the excitation (excitation) to adjust the reactive power, such as voltage adjustment or power factor improvement.

However, even in the case where there is only a conventional ancestor equipment, it is difficult to determine the optimal input amount.

In this situation, it is difficult to determine the input amount of the ancestor equipment and the control value of the UPFC in consideration of the cooperative control of the UPFC and the ancestor equipment for controlling the voltage and reactive power of the power system.

In addition, there are many optimization techniques in the application of the optimization method, but in order to apply the power system with strong nonlinearity, the linear optimization method should be applied by applying the linear optimization method or the nonlinear optimization method. In the linearization process, the linear optimization method is easily obtained. There is a problem that it is difficult to accurately consider the actual system situation, and in the case of the nonlinear optimization technique, there is a problem that the process of modeling and obtaining an optimal solution is complicated.

Accordingly, the present invention has been proposed to solve the above-mentioned general problems, and an object of the present invention is to use UPFC control values for controlling voltage and reactive power of a power system using a genetic algorithm that is a simple modeling and robust optimization technique. The present invention provides a cooperative control system and method for UPFC and ancestor equipment that can optimally determine the input amount of the ancestor equipment.

Another object of the present invention is to provide a mathematical modeling and gene, chromosome construction techniques required for the application of genetic algorithm.

1 is a block diagram of a cooperative control system of an UPFC and an ancestor facility according to an embodiment of the present invention.

As shown here, in the power system 200 having the UPFC 210 and the ancestor facility 220, the UPFC 210 or the ancestor facility 220 of the power system 200 using a dielectric algorithm. The cooperative control system 100 to determine the input amount of the;

FIG. 2 is a detailed block diagram of the cooperative control system in FIG. 1.

As shown therein, the cooperative control system 100 configures the chromosome 300 by the control value of the UPFC 210 and the input amount of the ancestor facility 220, and the control value of the UPFC 210. And a solution group initialization unit 110 for initializing the solution group of the genetic algorithm for determining the input amount of the ancestor facility 220; A suitability calculator 120 for evaluating the suitability of the solution to the solution group initialized by the solution group initialization unit 110 by obtaining voltage distribution and line loss of each bus line; The tide calculation unit 120 receives the UPFC control value of the search group and the input amount of the ancestor equipment as the algae calculation value and performs the algae calculation to transmit the voltage distribution result to the fitness calculation unit 120. Execution unit 130; An end condition determination unit 140 which receives the result of the bird calculation performing unit 130 and determines whether a preset end condition is satisfied; A copy unit 150 for copying the chromosome 300 if it is determined that the end condition determination unit 140 does not terminate; And crosses and mutants 160 crossing and mutating the chromosome 300 replicated in the replication unit 150 and transferring the result to the fitness calculation unit 120.

The solution group initialization unit 110, when initializing the solution group, the active power control value UP, the reactive power control value UQ, the voltage control value UV, and the ancestor facility 220 of the UPFC 210. ) Is randomly searched for the chromosome 300 having a gene of the ancestor facility input amount (Si) of the mother vessel installed, and generating as many as the number of populations.

The solution group initialization unit 110 sets an objective function by the following equation,

]는 조상설비 설치 모선들의 투입량과 UPFC 제어 값을 나타내는 벡터이며,

는 i 번째 모선의 조상설비의 투입량[Mvar]이고,

는 UPFC에 의해서 제어되는 유효전력량[MW]이며,

는 UPFC에 의해서 제어되는 무효전력량[Mvar]이고,

는 UPFC에 의해서 제어되는 전압[PU]을 나타내며,

는 UPFC의 유효전력 제어값, 무효전력 제어값, 전압 제어값, 조상설비 투입량으로 구성된 벡터 X에 대한 j 번째 모선의 전압 위반 정도를 나타내고,

는 UPFC 제어와 조상설비 투입에 따른 계통 유효 전력 손실[MW]을 나타내며,Where X = [

] Is a vector representing the input amount of ancestor installation bus and UPFC control value,

Is the input quantity [Mvar] of the ancestor facilities of the i th bus

Is the effective power amount [MW] controlled by UPFC,

Is the reactive power amount [Mvar] controlled by UPFC,

Represents the voltage [PU] controlled by the UPFC,

Represents the degree of voltage violation of the j-th bus for the vector X which consists of the active power control value, reactive power control value, voltage control value, and ancestor equipment input of the UPFC,

Represents the system effective power loss [MW] due to UPFC control and ancestor installation.

Constraints to satisfy the objective function equation is as follows,

는 j 번째 모선 전압 [PU],

과

는 모선의 목표전압범위의 상하한치 [PU],

와

는 모선의 전압허용범위의 상하한치 [PU],

는 모선전압 위반에 따른 페널티 상수를 나타내는 것을 특징으로 한다.In the constraint expression

Is the j th bus voltage [PU],

and

Is the upper and lower limit of the target voltage range of the bus [PU],

Wow

Is the upper and lower limit of the voltage allowable range of the bus [PU],

Is characterized in that the penalty constant due to the bus voltage violation.

The fitness calculation unit 120 evaluates a fitness function by the following equation,

는 가중치를 나타내며,

는 임의의 상수를 나타내는 것을 특징으로 한다.here

Represents the weight,

Is characterized in that it represents an arbitrary constant.

The termination condition determiner 140 determines the termination condition based on a predetermined number of repetitions.

The termination condition determination unit 140 determines that the termination is performed when the value of the best fit is not changed among the goodness of fit calculated by the fitness calculator 120.

3 is a flowchart illustrating a cooperative control method of an UPFC and an ancestor facility according to an embodiment of the present invention.

As shown in the figure, the chromosome 300 is configured by the control value of the UPFC 210 and the input amount of the ancestor facility 220, and the control value of the UPFC 210 and the input amount of the ancestor facility 220 are determined. A first step (ST1) of initializing a solution group of the genetic algorithm for the first; A second step (ST2) of evaluating the suitability of the solution to the solution group initialized in the first step by obtaining the voltage distribution and the line loss of each bus after the first step; A third step (ST3) of performing the algae calculation using the UPFC control value of the search group and the input amount of the ancestor equipment as the algae calculation value through the second step and performing the second step again according to the voltage distribution result; Wow; A fourth step (ST4) for judging whether a predetermined termination condition is satisfied after the second step; A fifth step (ST5) of replicating the chromosome (300) if it is determined that the process does not end in the fourth step; And a sixth step (ST6) returning to the second step after crossing and mutating the chromosome 300 replicated in the fifth step.

The first step ST1 may include an active power control value UP, a reactive power control value UQ, a voltage control value UV, and the ancestor facility 220 of the UPFC 210 when initializing a solution group. It is characterized in that it is carried out, including randomly search for the chromosome 300 having a gene of the ancestor facility input (Si) of the mother vessel is installed as the number of population.

In the first step ST1, an objective function equation is set by the following equation,

]는 조상설비 설치 모선들의 투입량과 UPFC 제어 값을 나타내는 벡터이며,

는 i 번째 모선의 조상설비의 투입량[Mvar]이고,

는 UPFC에 의해서 제어되는 유효전력량[MW]이며,

는 UPFC에 의해서 제어되는 무효전력량[Mvar]이고,

는 UPFC에 의해서 제어되는 전압[PU]을 나타내며,

는 UPFC의 유효전력 제어값, 무효전력 제어값, 전압 제어값, 조상설비 투입량으로 구성된 벡터 X에 대한 j 번째 모선의 전압 위반 정도를 나타내고,

는 UPFC 제어와 조상설비 투입에 따른 계통 유효 전력 손실[MW]을 나타내며,Where X = [

] Is a vector representing the input amount of ancestor installation bus and UPFC control value,

Is the input quantity [Mvar] of the ancestor facilities of the i th bus

Is the effective power amount [MW] controlled by UPFC,

Is the reactive power amount [Mvar] controlled by UPFC,

Represents the voltage [PU] controlled by the UPFC,

Represents the degree of voltage violation of the j-th bus for the vector X which consists of the active power control value, reactive power control value, voltage control value, and ancestor equipment input of the UPFC,

Represents the system effective power loss [MW] due to UPFC control and ancestor installation.

Constraints to satisfy the objective function equation is as follows,

는 j 번째 모선 전압 [PU],

과

는 모선의 목표전압범위의 상하한치 [PU],

와

는 모선의 전압허용범위의 상하한치 [PU],

는 모선전압 위반에 따른 페널티 상수를 나타내는 것을 특징으로 한다.In the constraint expression

Is the j th bus voltage [PU],

and

Is the upper and lower limit of the target voltage range of the bus [PU],

Wow

Is the upper and lower limit of the voltage allowable range of the bus [PU],

Is characterized in that the penalty constant due to the bus voltage violation.

In the second step ST2, a fitness function is evaluated by the following equation,

는 가중치를 나타내며,

는 임의의 상수를 나타내는 것을 특징으로 한다.here

Represents the weight,

Is characterized in that it represents an arbitrary constant.

In the fourth step ST4, the termination condition is determined by a predetermined number of repetitions.

The fourth step ST4 may be determined to end when the value of the best fit is not changed among the goodness of fits calculated in the second step.

The cooperative control system and method of the UPFC and the ancestor facilities according to the present invention have the effect of determining the optimum control value considering both the UPFC and the ancestor facilities for voltage and reactive power control using the dielectric algorithm.

In addition, if the present invention is used in actual field, efficient voltage and reactive power management is possible, and power loss can be minimized, and thus, there is an advantage in that efficient management and reduction of electric energy can be achieved.

The preferred embodiment of the cooperative control system and method of the UPFC and the ancestor equipment according to the present invention configured as described above will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed descriptions of well-known functions or configurations will be omitted if it is determined that the detailed description of the present invention may unnecessarily obscure the subject matter of the present invention. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to intention or precedent of a user or an operator, and thus, the meaning of each term should be interpreted based on the contents throughout the present specification. will be.

First, the present invention is to optimally determine the control value of the UPFC and the input amount of the ancestor equipment by using the genetic algorithm which is a representative nonlinear optimization technique.

1 is a block diagram of a cooperative control system of an UPFC and an ancestor facility according to an embodiment of the present invention.

Therefore, the cooperative control system 100 determines the input value of the UPFC 210 control value and the ancestor facility 220 of the power system 200 by using the genetic algorithm.

In addition, the power system 200 is controlled by the cooperative control system 100, and is provided with a UPFC 210 and the ancestor facility 220.

Genetic Algorithm is based on Darwin's theory of evolution in biology, and has been proposed as a way of solving problems using computers. This genetic algorithm is applied as an algorithm to solve the problem by applying Darwin and Mendel's law. It is a method of probabilistically searching for solutions by mimicking the evolutionary process of the organism (natural selection, genetic law). Genetic algorithms were first introduced in 1975 by Holland. In his thesis "Adaptation in Natural and Artifitial Systems", he attempted to design artificial systems by abstracting the evolution of living things. Since then, the theory of genetic algorithm and applied research using it have been actively conducted.

FIG. 2 is a detailed block diagram of the cooperative control system in FIG. 1.

So, the cooperative control system 100 is a sea group initializing unit 110, goodness-of-fit calculation unit 120, bird calculation performing unit 130, termination condition determination unit 140, replication unit 150, cross and mutation unit ( 160) can be configured to include.

The solution group initialization unit 110 configures the chromosome 300 by the control value of the UPFC 210 and the input amount of the ancestor facility 220, and determines the control value of the UPFC 210 and the input amount of the ancestor facility 220. Initialize the population of genetic algorithms for At this time, the sea group initialization unit 110 is provided with an active power control value UP, a reactive power control value UQ, a voltage control value UV, and an ancestor facility 220 when the solution group is initialized. Randomly search for chromosome 300, the gene of the ancestor facility input (Si) of the mother ship is generated as the number of population.

In addition, the fitness calculator 120 calculates the voltage distribution of each bus and the loss of the line, and evaluates the fitness of the solution for the solution group initialized by the solution group initialization unit 110.

In addition, the algae calculation unit 130 receives the input of the UPFC control value and the ancestor equipment of the search group through the fitness calculation unit 120 as the algae calculation value to perform the algae calculation to the fitness calculation unit 120 Pass the distribution result.

In addition, the termination condition determination unit 140 receives the result of the bird calculation performing unit 130 and determines whether the predetermined termination condition is satisfied.

In addition, if the copy unit 150 determines that the end condition determination unit 140 does not terminate, the copy chromosome 300 is copied.

In addition, the hybridization and mutation unit 160 crosses and mutates the chromosome 300 replicated in the replication unit 150 and transfers the result to the fitness calculation unit 120.

3 is a flowchart illustrating a cooperative control method of an UPFC and an ancestor facility according to an embodiment of the present invention.

Thus, the chromosome 300 is formed by the control value of the UPFC 210 and the input amount of the ancestor facility 220, and the solution group of the genetic algorithm for determining the control value of the UPFC 210 and the input amount of the ancestor facility 220 is determined. Initialize (ST1).

In addition, the voltage distribution of each bus and the loss of the line are calculated to evaluate the suitability of the solution for the solution group initialized in the first step (ST2).

At this time, the algae calculation is performed by using the UPFC control value of the search solution group and the input amount of the ancestor equipment as the algae calculation value, and the fitness evaluation is performed again based on the voltage distribution result (ST3).

Further, it is determined whether or not the preset termination condition is satisfied (ST4).

Therefore, if it is determined that it does not end, the chromosome 300 is replicated (ST5), the cloned chromosome 300 is crossed and mutated, and then fitness evaluation is performed again (ST6).

When explaining the present invention in more detail as follows.

First, Figure 4 is a block diagram of a chromosome for the application of the genetic algorithm in the present invention, Figure 5 is a graph showing a convergence example of the fitness according to the number of generations in the present invention.

The cooperative control method of the UPFC and the ancestor equipment using the genetic algorithm of the present invention is to obtain the optimal solution of the input amount of the UPFC and the ancestor equipment as shown in FIG. 3 by utilizing the genetic algorithm as an optimization technique using the following objective function and constraint equation. The objective function equation is shown in Equation 1 below.

]는 조상설비 설치 모선들의 투입량과 UPFC 제어 값을 나타내는 벡터이며, 여기서

는 i 번째 모선의 조상설비의 투입량[Mvar]이고,

는 UPFC에 의해서 제어되는 유효전력량[MW]이며,

는 UPFC에 의해서 제어되는 무효전력량[Mvar]이고,

는 UPFC에 의해서 제어되는 전압[PU]을 나타낸다.In Equation 1, X = [

] Is a vector representing the input amount of ancestor installation bus and UPFC control value,

Is the input quantity [Mvar] of the ancestor facilities of the i th bus

Is the effective power amount [MW] controlled by UPFC,

Is the reactive power amount [Mvar] controlled by UPFC,

Denotes the voltage [PU] controlled by the UPFC.

는 UPFC의 유효전력 제어값, 무효전력 제어값, 전압 제어값, 조상설비 투입량으로 구성된 벡터 X에 대한 j 번째 모선의 전압 위반 정도를 나타내고,

는 UPFC 제어와 조상설비 투입에 따른 계통 유효 전력 손실[MW]을 나타낸다.Also

Represents the degree of voltage violation of the j-th bus for the vector X which consists of the active power control value, reactive power control value, voltage control value, and ancestor equipment input of the UPFC,

Shows the system effective power loss [MW] following UPFC control and ancestor input.

The objective function of Equation 1 is configured in such a way that the voltage violation of each bus line under the control of the UPFC 210 and the ancestor facility 220 is minimized and the line loss for this condition is minimized.

Constraints for satisfying the objective function equation are as shown in Equation 2 to Equation 9 below.

는 j 번째 모선 전압 [PU],

과

는 모선의 목표전압범위의 상하한치 [PU],

와

는 모선의 전압허용범위의 상하한치 [PU],

는 모선전압 위반에 따른 페널티 상수를 나타낸다.In this constraint

Is the j th bus voltage [PU],

and

Is the upper and lower limit of the target voltage range of the bus [PU],

Wow

Is the upper and lower limit of the voltage allowable range of the bus [PU],

Denotes the penalty constant for the bus voltage violation.

Equation 2 indicates that the input amount of the ancestor facility 220 should be possible within the facility capacity range. The actual input amount has a discontinuous value according to the number of bank inputs in units of banks of the ancestor equipment 220.

Equations 3 to 5 illustrate a constraint that the control of the UPFC 210 should be within a controllable range.

)를 부가하였다.In addition, according to the bus voltage magnitude, the bus voltage of the system was defined as a penalty value as shown in Equations 6 to 9 to induce distribution of the bus voltage within the target voltage range. That is, a penalty is linearly added to the bus voltage magnitude within the bus voltage tolerance range of Equation 7, Equation 9 is expressed by any large penalty constant for the bus voltage magnitude within the bus voltage violation range.

) Was added.

On the basis of the objective function of Equation 1 and the constraints of Equation 2 to Equation 9, the optimization of the genetic algorithm is to first initialize the solution group, which is the active power control value (UP) and reactive power control of the UPFC. A chromosome 300 having a gene (UQ), a voltage control value (UV), and an ancestor input amount (Si) of a mother vessel provided with an ancestor facility is randomly searched for and generated as many as the number of populations.

In addition, the UPFC control value of the search solution group and the input amount of the ancestor equipment are inputted as the algae calculation value, and the algae calculation is performed. The voltage distribution and the line loss of each bus line are calculated and the following fitness function is obtained for each possible solution. The fit of the solution is evaluated by the following equation (10).

는 가중치를 나타내며,

는 임의의 상수를 나타낸다.here

Represents the weight,

Represents any constant.

When this process is performed, it checks whether the end is satisfied, and when it is satisfied, the operation is terminated. If it is not satisfied, it repeats, crosses, and mutates the process, and then repeats the process of calculating algae and goodness of fit.

The termination condition may be specified a certain number of times, and may be set in various ways such as terminating when the value of the best fit of the goodness of fit is not changed. In order to reduce the computational speed of the genetic algorithm, it is also an efficient way to terminate the number of generations. In this case, since this converges to an approximate optimal solution within 10 times as shown in Fig. 5, it is effective to use this termination condition in practical applications. Judging.

As such, the present invention uses the genetic algorithm, which is a representative nonlinear optimization technique, to optimally determine the control value of UPFC and the input amount of ancestor equipment.

Although the present invention has been described in more detail with reference to the examples, the present invention is not necessarily limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

1 is a block diagram of a cooperative control system of an UPFC and an ancestor facility according to an embodiment of the present invention.

FIG. 2 is a detailed block diagram of the cooperative control system in FIG. 1.

3 is a flowchart illustrating a cooperative control method of an UPFC and an ancestor facility according to an embodiment of the present invention.

Figure 4 is a block diagram of a chromosome for the application of genetic algorithm in the present invention.

5 is a graph showing an example of convergence of the goodness of fit according to the number of generations in the present invention.

Explanation of symbols on the main parts of the drawings

100: cooperative control system

110: sea group initialization unit

120: fitness calculation unit

130: bird calculation unit

140: end condition determination unit

150: replica unit

160: mating and mutation

200: power system

210: UPFC

220: ancestor equipment

300: chromosome

Claims (13)

In the power system equipped with UPFC and ancestor equipment, A cooperative control system for determining an input amount of the UPFC or the ancestor equipment of the power system using a genetic algorithm; The cooperative control system of the UPFC and ancestor equipment, characterized in that configured to include. The method according to claim 1, The cooperative control system, A solution group initialization unit for constructing a chromosome by the control value of the UPFC and the input amount of the ancestor equipment, and initializing a solution group of the genetic algorithm for determining the control value of the UPFC and the input amount of the ancestor equipment; A fitness calculation unit for evaluating the suitability of the solution to the solution group initialized by the solution group initialization unit by obtaining the voltage distribution of each bus line and the loss of the line; A tidal current calculation unit that receives the UPFC control value of the search group and the input amount of the ancestor facility through the fitness calculation unit as a tidal current calculation value and performs a tidal current calculation to deliver a voltage distribution result to the fitness calculation unit; An end condition determination unit which receives the result of the algal calculation execution unit and determines whether a preset end condition is satisfied; A replication unit for replicating the chromosome if it is determined that the termination condition determination unit does not terminate; A hybridization and mutation unit for crossing and mutating the chromosome replicated in the replication unit and transferring the result to the fitness calculation unit; Cooperative control system of the UPFC and ancestors, characterized in that configured to include. The method according to claim 2, The solution group initialization unit, When the solution group is initialized, the gene includes the active power control value UP, the reactive power control value UQ, the voltage control value UV, and the ancestor equipment input amount Si of the mother vessel in which the ancestor equipment is installed. A cooperative control system for UPFC and ancestors, comprising randomly searching for chromosomes and generating as many populations as possible. The method according to claim 2, The solution group initialization unit, Set the objective function by the following equation,

Where X = [

] Is a vector representing the input amount of ancestor installation bus and UPFC control value,

Is the input quantity [Mvar] of the ancestor facilities of the i th bus

Is the effective power amount [MW] controlled by UPFC,

Is the reactive power amount [Mvar] controlled by UPFC,

Represents the voltage [PU] controlled by the UPFC,

Represents the degree of voltage violation of the j-th bus for the vector X which consists of the active power control value, reactive power control value, voltage control value, and ancestor equipment input of the UPFC,

Represents the system effective power loss [MW] due to UPFC control and ancestor installation. Constraints to satisfy the objective function equation is as follows,

In the constraint expression

Is the j th bus voltage [PU],

and

Is the upper and lower limit of the target voltage range of the bus [PU],

Wow

Is the upper and lower limit of the voltage allowable range of the bus [PU],

The cooperative control system of the UPFC and the ancestor equipment, characterized in that the penalty constant according to the bus voltage violation. The method according to claim 2, The fitness calculation unit, The fitness is evaluated by the following equation,

here

Represents the weight,

Is a cooperative control system of UPFC and ancestor equipment, characterized in that it represents an arbitrary constant. The method according to any one of claims 2 to 5, The termination condition determination unit, A cooperative control system for UPFC and ancestor equipment, characterized in that the termination condition is determined by a predetermined predetermined number of repetitions. The method according to any one of claims 2 to 5, The termination condition determination unit, The coordination control system of the UPFC and the ancestor equipment, characterized in that the determination is terminated when the value of the best fit is not changed from the goodness of fit calculated by the fitness calculation unit. A first step of constructing a chromosome by the control value of the UPFC and the input amount of the ancestor equipment, and initializing a solution group of the genetic algorithm for determining the control value of the UPFC and the input amount of the ancestor equipment; A second step of evaluating the suitability of the solution to the solution group initialized in the first step by obtaining the voltage distribution and the line loss of each bus after the first step; A third step of performing the algae calculation using the UPFC control value of the search group and the input amount of the ancestor equipment as the algae calculation value through the second step so that the second step is re-run based on the voltage distribution result; A fourth step of determining whether a predetermined termination condition is satisfied after the second step; A fifth step of duplicating the chromosome if it is determined not to end in the fourth step; A sixth step of crossing and mutating the chromosome replicated in the fifth step and returning to the second step; The cooperative control method of the UPFC and the ancestor equipment, characterized in that performed. The method according to claim 8, The first step is, When the solution group is initialized, the gene includes the active power control value UP, the reactive power control value UQ, the voltage control value UV, and the ancestor equipment input amount Si of the mother vessel in which the ancestor equipment is installed. A method of cooperative control of UPFC and ancestors, comprising randomly searching for chromosomes and generating as many populations as possible. The method according to claim 8, The first step is, Set the objective function by the following equation,

Where X = [

] Is a vector representing the input amount of the ancestor installation bus and UPFC control value.

Is the input quantity [Mvar] of the ancestor facilities of the i th bus Is the effective power amount [MW] controlled by UPFC,

Is the reactive power amount [Mvar] controlled by UPFC,

Represents the voltage [PU] controlled by the UPFC,

Represents the degree of voltage violation of the j-th bus for the vector X which consists of the active power control value, reactive power control value, voltage control value, and ancestor equipment input of the UPFC,

Represents the system effective power loss [MW] due to UPFC control and ancestor installation. Constraints to satisfy the objective function equation is as follows,

In the constraint expression

Is the j th bus voltage [PU],

and

Is the upper and lower limit of the target voltage range of the bus [PU],

Wow

Is the upper and lower limit of the voltage allowable range of the bus [PU],

The cooperative control method of the UPFC and the ancestor equipment, characterized in that the penalty constant according to the bus voltage violation. The method according to claim 8, The second step, The fitness is evaluated by the following equation,

here

Represents the weight,

Is a cooperative control method of the UPFC and the ancestor equipment, characterized in that it represents an arbitrary constant. The method according to any one of claims 8 to 11, The fourth step, A cooperative control method for UPFC and ancestor equipment, characterized in that the termination condition is determined by a predetermined predetermined number of repetitions. The method according to any one of claims 8 to 11, The fourth step, The cooperative control method of the UPFC and the ancestor equipment, characterized in that the determination is to end if the value of the best fit of the fitness calculated in the second step does not change.

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