JP6733201B2 - Voltage stabilization control device, control method of voltage stabilization control device, and program - Google Patents

Description

The present invention relates to a voltage stabilization control device, a control method for a voltage stabilization control device, and a program.

The voltage of the power system is settled at the equilibrium point due to various influences such as the output and voltage of the generator, the operating power factor, the power consumption and power factor of the load, the system configuration, and the operating condition of the phase adjusting equipment. Therefore, when there is a change in these factors or when there is some disturbance in the power system, the voltage of the power system changes. In this case, the ability of the voltage of the power system to settle at a new equilibrium point or a property related thereto is called voltage stability of the power system.

However, in recent years, the grid interconnection of distributed power sources such as wind power generation and solar power generation has increased, and uncertain and rapid output fluctuations are affecting the voltage stability of the power system.

Therefore, it is necessary to understand the degree of voltage drop or the possibility of voltage collapse when the load power demand increases or an accident occurs at the central power supply station or the local power supply station provided in the power system in advance. Various controls are performed to enhance voltage stability, such as preventive control.

Various techniques have been developed so far for analyzing and controlling the voltage stability of such a power system (see, for example, Patent Document 1 and Non-Patent Document 1).

JP, 2004-187390, A

Naoto Yurino and 3 others, "Approximation method of nearest saddle node branch point based on power flow multi-root-Proposal of new voltage stability monitoring and control method-", Theory of Electronics B, No. 119, Vol. 4, pp. 507-515, 1999

For example, in Patent Document 1, when the voltage of the power system changes, a PV curve that incorporates the response characteristics of the voltage regulator that operates to suppress the voltage change is obtained, and then a voltage stability index is obtained. , A technique for calculating the optimum power flow state is described.

However, the technique described in Patent Document 1 uses the active power margin and voltage stability index of each bus as an evaluation function to calculate a PV curve for each bus to obtain a load margin. Load margin is not taken into consideration.

In Non-Patent Document 1, the load increase vector from the operating point to the point closest to the operating point (closest tidal current limit point) in the PV curve to the power flow limiting point (point at which voltage collapse occurs) is calculated. However, there is disclosed a technique for stabilizing the voltage by controlling the voltage adjusting device so as to move the operating point in the opposite direction with respect to the load increase vector.

However, voltage regulators and power systems have restrictions such as output restrictions of active power, output restrictions of reactive power, and upper and lower limit restrictions of bus voltage. Sometimes it is not optimal to move.

For example, as shown in FIG. 7, even if it is attempted to move the operating point in the opposite direction (direction of the vector r) to the closest tidal current limit point, restrictions on the voltage regulator and the power system (range surrounded by a square in FIG. 7) In some cases, the operating point may be moved by a small amount compared to the expected moving amount.

Further, as shown in FIG. 8, if the operating point is moved in the direction opposite to the closest tidal current limit (direction of vector r), the load margin may be reduced and the voltage of the power system may be reduced.

The present invention has been made in view of such problems, and a voltage stabilization control device and a control method of the voltage stabilization control device capable of performing control so as to more reliably stabilize the voltage of the power system. And to provide a program.

One of the means for solving the above problems is a voltage stabilization control device that controls a voltage regulator provided in a power system, using system information indicating the configuration and electrical characteristics of the power system, Repetitively calculating the voltage of the power system while changing the active power and the reactive power of each load of the power system from the current values, and the active power of each load of the power system such that the voltage of the power system rises and the voltage stabilization vector r representing the variation of the reactive power, the voltage sensitivity vector e _r representing the variation of the active power and reactive power of each load when the falling slope is the maximum voltage of the electric power system, recently and a predetermined positive coefficient k as a load margin to contact tide limit point becomes a predetermined value lambda, with a voltage stabilization vector calculating unit for calculating by _r = -k · e r, the voltage regulator An output vector calculation unit that calculates active power and reactive power to be output to the voltage regulator as an output vector so that the difference with the voltage stabilization vector is minimized in a range satisfying the constraint condition during operation of An output vector output unit that outputs the output vector to the voltage regulator.

In addition, the problem disclosed by the present application and the solution to the problem will be clarified by the description of the mode for carrying out the invention, the description of the drawings, and the like.

According to the present invention, it becomes possible to perform control so as to more reliably stabilize the voltage of the power system.

It is a figure which shows the function structure of a voltage stabilization control apparatus. It is a figure which shows the hardware constitutions of a voltage stabilization control apparatus. It is a figure which shows the memory|storage device of a voltage stabilization control apparatus. It is a figure which shows an electric power system. It is a flowchart which shows the control method of a voltage stabilization control apparatus. It is a figure which shows a mode that the voltage of an electric power system is controlled. It is a figure which shows a mode that the voltage of an electric power system is controlled. It is a figure which shows a mode that the voltage of an electric power system is controlled.

At least the following matters will be made clear by the description in the present specification and the accompanying drawings.

== Power system ==
As shown in FIG. 4, the power system 1000 according to the present embodiment is configured to include a power generation facility 1100, a load facility 1200, a voltage adjustment device 1300, and a voltage stabilization control device 100.

The power generation facility 1100 is a power source that can extract and output power energy from a predetermined energy source, and is configured by, for example, a hydroelectric power generation facility, a nuclear power generation facility, a thermal power generation facility, a wind power generation facility, a solar power generation facility, or the like. It

The load device 1200 is an electric device such as a motor or lighting in a factory or a home that consumes the electric power supplied from the power generation facility 1100.

The voltage adjustment device 1300 is a device that can increase or decrease the voltage of the power system 1000 by outputting active power and reactive power to the power system 1000. By appropriately controlling the voltage adjusting device 1300, the voltage of the power system 1000 can be stabilized.

The voltage stabilization control device 100 calculates active power and reactive power that the voltage adjustment device 1300 should output in order to stabilize the voltage of the power system 1000, and commands an output vector having the active power and reactive power as elements. This is a device that outputs the value to the voltage adjusting device 1300.

Although not shown in FIG. 4, the power system 1000 includes a power transmission line T such as a power transmission line and a distribution line, a phase adjusting facility S that controls the phase of power, a power storage facility B, a transformer H, a switch K, and It is configured to have various equipment such as various measuring instruments M for measuring physical quantities such as voltage, current, frequency, and power factor of the power system 1000.

==Voltage stabilization controller==
As described above, the voltage stabilization control device 100 according to the present embodiment is an information processing device that calculates active power and reactive power to be output by the voltage adjustment device 1300 and outputs an output vector to the voltage adjustment device 1300.

The overall configuration of the voltage stabilization control device 100 according to the present embodiment is shown in FIGS. 1 and 2. FIG. 1 is a diagram for explaining the functional configuration of the voltage stabilization control device 100, and FIG. 2 is a diagram for explaining the hardware configuration of the voltage stabilization control device 100.

First, the hardware configuration of the voltage stabilization control device 100 will be described with reference to FIG. The voltage stabilization control device 100 according to the present embodiment includes a CPU (Central Processing Unit) 110, a memory 120, a communication device 130, a storage device 140, an input device 150, an output device 160, and a recording medium reading device 170. Is a computer that will be.

The CPU 110 controls the entire voltage stabilization control device 100, and reads the control program 600, which is stored in the storage device 140 and configured to perform various operations according to the present embodiment, into the memory 120. By executing, various functions as the voltage stabilization control device 100 are realized.

For example, although the details will be described later, the control program 600 is executed by the CPU 110, and the voltage stabilization vector calculation unit 102 and the output vector calculation are performed by cooperating with hardware devices such as the memory 120, the communication device 130, and the storage device 140. The unit 103 and the output vector output unit 104 are realized.

The memory 120 can be composed of, for example, a semiconductor memory device.

The communication device 130 is a network interface such as a network card. The communication device 130 receives data from another computer via a communication path 500 such as the Internet or a LAN (Local Area Network), and stores the received data in the storage device 140 or the memory 120. Further, the communication device 130 transmits the data stored in the storage device 140 or the memory 120 to another computer via the communication path 500.

For example, the voltage stabilization control device 100 is communicatively connected to the voltage adjustment device 1300 via a communication path 500 as shown in FIG. 4, and outputs command values of active power and reactive power to be output to the voltage adjustment device 1300. , And to the voltage regulator 1300 via the communication path 500.

In addition, the voltage stabilization control device 100 acquires measurement results of the voltage, current, frequency, power factor, etc. of the power system 1000 from various measuring instruments M provided in the power system 1000 via the communication path 500.

The input device 150 is a device such as a keyboard, a mouse, and a microphone, and is a device for receiving information input by an operator of the voltage stabilization control device 100. The output device 160 is a device such as an LCD (Liquid Crystal Display), a printer, and a speaker, and is a device for outputting information.

The storage device 140 can be configured by, for example, a hard disk device, a semiconductor storage device, or the like. The storage device 140 is a device that provides a storage area for storing various programs, data, tables, and the like. FIG. 3 shows a state in which the control program 600 and the data storage unit 700 are stored in the storage device 140.

The voltage stabilization control device 100 uses the recording medium reading device 170 to read the control program 600 from the recording medium (various optical disks, magnetic disks, semiconductor memories, etc.) 800 and store it in the storage device 140. Alternatively, the control program 600 may be acquired from another computer communicably connected via the communication device 130 and stored in the storage device 140.

The data storage unit 700 also stores system information, calculation formulas, constraint conditions, and the like used when the voltage stabilization control device 100 calculates the command values of the active power and the reactive power output to the voltage adjustment device 1300. ..

Although details of these will be described later, the grid information is information representing the configuration and electrical characteristics of the power grid 1000, and includes, for example, the length and impedance of the transmission line T, admittance, the position of the load facility 1200, active power, and reactive power. , Position of power generation equipment 1100, fuel cost coefficient (index such as yen/kWh), active power and reactive power, position of power storage equipment B, active power and reactive power, position and capacity of phase adjusting equipment S, node voltage Information such as the lower limit value and the tap ratio of the transformer H is included.

In addition, the calculation formula includes a first calculation formula for obtaining the closest power flow limit point, which is a power flow limit point (also referred to as a voltage stability limit point) when the voltage of the power system 1000 becomes unstable earliest, and voltage adjustment. A second calculation formula for calculating the output vector of the active power and the reactive power output from the device 1300 is included.

The constraint conditions include various constraint conditions at the time of operation permitted for the power generation facility 1100, the load facility 1200, and the voltage regulator 1300. For example, upper and lower limit values of voltage, upper and lower limit values of active power and reactive power, and maximum Contains information such as output.

Next, the functional configuration of the voltage stabilization control device 100 according to the present embodiment will be described with reference to FIG. 1. Before the specific description, it is used in the following description for ease of understanding. The various symbols used are listed together.

n ∈ natural number: number of load nodes (number of load facilities 1200)
m ∈ natural number: number of generator nodes (number of power generation facilities 1100)
s ∈ natural number: the number of nodes of the voltage regulator (the number of voltage regulators 1300)
N=(1,2,...,n): Load node set (set of load equipment 1200)
M=(1,2,...,m): Set of power generation nodes (set of power generation equipment 1100)
S=(1,2,...,s): Voltage regulator node set (set of voltage regulator 1300)
p _di ∈ one-dimensional real vector, ∀i ∈ N: active power vector of load node
q _di ∈ one-dimensional real vector, ∀i ∈ N: reactive power vector of load node
p _gi ∈ one-dimensional real vector, ∀i ∈ M: generator active power vector
q _gi ∈ one-dimensional real vector, ∀i ∈ M: generator reactive power vector
p _si ∈ one-dimensional real vector, ∀i ∈ S: active power component of the output vector (command value of active power output to the voltage regulator 1300)
q _si ∈ one-dimensional real vector, ∀i ∈ S: reactive power component of the output vector (command value of reactive power output to the voltage regulator 1300)
p _i ∈ one-dimensional real vector, ∀i ∈ (N∪M∪S): active power vector of the power flow equation
q _i ∈ one-dimensional real vector, ∀i ∈ (N∪M∪S): Reactive power vector of power flow equation
Cg ∈ (n+m)×m dimensional real matrix: generator node specification matrix
Cs ∈ (n+m)×m-dimensional real number matrix: device arrangement node designation matrix (when the voltage adjusting device 1300 is arranged in each load equipment 1200)
δ _i ∈ one-dimensional real vector, ∀i ∈ (N ∪M ∪S): voltage phase vector
v _i ∈ one-dimensional real vector, ∀i ∈ (N∪M∪S): voltage amplitude vector
d ∈ 2n-dimensional real matrix: load increase vector to the nearest tidal current limit point
r ∈ 2n-dimensional real matrix: voltage stabilization vector As shown in FIG. 1, the voltage stabilization control device 100 includes functional blocks of a voltage stabilization vector calculation unit 102, an output vector calculation unit 103, and an output vector output unit 104. Is configured.

The voltage stabilization vector calculation unit 102 executes the closest power flow limit point algorithm by executing the first calculation formula using the system information, and obtains the closest power flow limit point for the current operating point of the power system 1000. ..

That is, the voltage stabilization vector calculation unit 102 uses the system information stored in the data storage unit 700 to gradually increase the active power and reactive power of each load facility 1200 of the power system 1000 from the current value by a predetermined amount. The voltage of the power system 1000 is repeatedly calculated while changing, and the power flow limit point when the voltage of the power system 1000 becomes unstable is obtained. In particular, the voltage stabilization vector calculation unit 102 finds the closest tidal current limit point, which is the tidal current limit point when the voltage of the power system 1000 becomes unstable earliest.

Note that various methods such as a direct method and an indirect method have been developed as algorithms for obtaining the closest tidal current limit point, and for example, the method described in Non-Patent Document 1 can be used.

In addition, the voltage stabilization vector calculation unit 102 can also calculate the load increase vector and the voltage sensitivity vector when calculating the closest tidal current limit point.

The load increase vector here means a vector whose starting point is the current operating point and whose end point is the closest tidal current limit point, and the active power and reactive power at the operating point of each load device 1200 and the closest tidal current limit point. Is a vector whose elements are the difference between the active power and the reactive power in. The load increase vector is the vector indicated by d in FIG.

In addition, the voltage sensitivity vector is the maximum ratio of the amount of decrease in the voltage of the power system 1000 to the amount of change when the active power and the reactive power at the present time of each load facility 1200 of the power system 1000 are slightly changed. Is a vector whose elements are the amount of change of each load facility 1200. That is, in the present embodiment, the direction of the voltage sensitivity vector is the direction in which the falling gradient of the voltage of the power system 1000 is maximum. The voltage sensitivity vector is a vector indicated by e _r in FIG.

Specifically, the voltage sensitivity vector e _r represents the amount of change in the voltage amplitude with respect to the minute variation of the active power and the reactive power in each load facility 1200, and is represented by the equation (1). This voltage sensitivity vector e _r is used as a voltage stability index, and a small voltage sensitivity means that the voltage stability is small.

The voltage sensitivity vector e _r shown in Expression (1) is obtained by extracting the diagonal components of the matrices represented by Expressions (2) and (3).

That is, more accurately, the voltage in each load equipment 1200 changes under the influence of the change in the active power or the reactive power in the other load equipment 1200, and therefore the voltage sensitivity vector e _r is _expressed by the equation (2) and the equation ( The matrix is as shown in 3).

However, since the influence of changes in active power and reactive power in the other load equipment 1200 is smaller than the influence of changes in active power and reactive power in the own load equipment 1200, active power and reactive power in the other load equipment 1200 are small. The error is within the allowable range even if the influence of the change of is ignored.

For this reason, the voltage stabilization control device 100 according to the present embodiment obtains the voltage sensitivity vector e _r by the equation (1). With such an aspect, it is possible to reduce the calculation processing load of the voltage stabilization control device 100 and increase the processing speed. Accordingly, it becomes possible to perform the stabilization control of the voltage of the power system 1000 according to the present embodiment in real time (for example, in a short cycle of several minutes to 10 minutes).

The voltage stabilization vector calculation unit 102 also calculates the voltage stabilization vector. The voltage stabilization vector is a vector indicated by r in FIG. 6, and is a vector indicating the amount of change in active power and reactive power of each load facility 1200 such that the voltage of the power system 1000 rises.

Therefore, by moving the operating point in the power system 1000 in the direction indicated by the voltage stabilization vector r, the voltage of the power system 1000 rises, and the operating point can be moved away from the power flow limit point. It is possible to stabilize the voltage of the system 1000.

In addition, in the present embodiment, a predetermined coefficient is added to the above-mentioned amount of change in active power and reactive power when the ratio of the amount of increase in voltage of the power system 1000 to the amount of change in active power and reactive power of each load facility 1200 is maximum. The voltage stabilization vector r is obtained by multiplication. That is, the direction of the voltage stabilization vector is the direction in which the rising gradient of the voltage of the power system 1000 is maximum. Therefore, the voltage of the power system 1000 can be raised most efficiently by moving the operating point in the power system 1000 in the direction indicated by the voltage stabilization vector r.

The voltage stabilization vector calculation unit 102 uses the grid information stored in the data storage unit 700, and the power grid 1000 when the active power and reactive power of each load facility 1200 of the power grid 1000 has changed from the current values. The voltage stabilization vector r is calculated by calculating the change amount of the voltage.

However, as described above, the voltage stabilization vector calculation unit 102 obtains the voltage sensitivity vector e _r . The direction of the voltage sensitivity vector e _{r is} the direction in which the falling gradient of the voltage of the power system 1000 is maximum. Therefore, the voltage stabilization vector calculation unit 102 can also calculate a vector in the direction opposite to the voltage sensitivity vector e _r as the voltage stabilization vector r. According to such an aspect, the voltage stabilization vector calculation unit 102 easily calculates the voltage stabilization vector r in the direction in which the rising gradient of the voltage of the power system 1000 is maximized by using the voltage sensitivity vector e _r. It becomes possible to do.

From the above, the voltage stabilization vector r can be expressed by the equation (4) using the voltage sensitivity vector e _r .

r=−k· _er (k is a predetermined coefficient of a positive scalar value) (4)
In this way, the voltage stabilization vector calculation unit 102 calculates the voltage stabilization vector r by multiplying the voltage sensitivity vector _er by the negative coefficient (-k).

Here, the voltage stabilization vector calculation unit 102 according to the present embodiment determines the value of k so that the load margin up to the closest tidal current limit point becomes the predetermined value λ. That is, as shown in FIG. 6, when the operating point of the power system 1000 is moved to the position that is the end point of the voltage stabilization vector r, the load margin up to the closest power flow limit point becomes the predetermined value λ. To At this time, the voltage stabilization vector r, the voltage sensitivity vector e _r, and the load margin λ have a relationship as shown in Expression (5).

The value of k that satisfies the equation (5) can be easily obtained by a straight line search. With such a mode, it is possible to maintain the load margin up to the closest power flow limit point at the predetermined value λ, and it is possible to stabilize the voltage of the power system 1000.

The value of the load margin λ is stored in the data storage unit 700 in advance and can be determined, for example, based on the load margin up to the closest tidal current limit point during normal operation of the power system 1000.

Next, the output vector calculation unit 103 will be described.

The output vector calculation unit 103 calculates an output vector that is the active power and the reactive power to be output by the voltage regulator 1300. At this time, the output vector calculation unit 103 satisfies the constraint condition at the time of operation of each component of the power system 1000 such as the voltage adjustment device 1300, the power generation equipment 1100, the load equipment 1200, and the difference with the voltage stabilization vector r is minimum. The output vector is calculated so that

Specifically, the output vector calculation unit 103 performs the second calculation represented by the equations (6) and (7) within a range satisfying the constraint conditions represented by the following equations (8) to (12). The output vector that minimizes the value of the expression is calculated. The output vector is (p _s ,q _s ) ^T .

Expression (6) is for obtaining the minimum value of the sum of squares of the voltage stabilization vector r=(r _p ,r _q ) ^T and the output vector (p _s ,q _s ) ^T. The output vector (p _s ,q _s ) ^{T when} is minimum has the minimum difference from the voltage stabilization vector r.

Expression (8) is the upper and lower limits of the voltage of the voltage adjustment device 1300, the power generation facility 1100, and the load facility 1200 that configure the power system 1000. Expressions (9) to (11) are output limits of the power adjustment device 1300. Equation (12) is a power flow equation and is represented by an equality constraint.

The problems represented by these equations (6) to (12) are nonlinear programming problems, and can be solved by a nonlinear programming solver such as a sequential quadratic programming method, a generalized reduced gradient method, or an extended Lagrange method. ..

The output vector calculation unit 103 obtains the minimum value of the sum of squares of the voltage stabilization vector r=(r _p ,r _q ) ^T and the output vector (p _s ,q _s ) ^T by the equation (6). However, the meaning of the minimum value here is not limited to the literal minimum value, but may be a value close to the minimum value, for example, a case where the difference from the minimum value is a predetermined value or less.

The output vector output unit 104 outputs the output vector (p _s , q _s ) ^T calculated by the output vector calculation unit 103 to the voltage adjustment device 1300 as a command value.

Thereby, the voltage regulator 1300 outputs the active power and the reactive power designated by the output vector (p _s , q _s ) ^T to the power grid 1000.

In this way, by increasing the voltage of the power system 1000 while considering the restrictions in the power system 1000, it is possible to keep the new operating point away from the power flow limit point and stabilize the voltage of the power system 1000. Become.

Next, the flow of processing of the voltage stabilization control device 100 according to the present embodiment will be described with reference to the flowchart shown in FIG.

First, the voltage stabilization control device 100 uses the system information stored in the data storage unit 700 to gradually change the active power and reactive power of each load facility 1200 of the power system 1000 from the current value by a predetermined amount. However, the voltage of the power system 1000 is repeatedly calculated, and the closest tidal current limit point that is the tidal current limit point when the voltage of the power system 1000 becomes unstable earliest is obtained (S1000).

Subsequently, the voltage stabilization control device 100 calculates the voltage sensitivity vector e _r , the load increase vector d, and the load margin stored in the data storage unit 700, which are also calculated when the closest power flow limit point is obtained. Using λ and, a voltage stabilization vector r that satisfies the expression (5) is obtained (S1010).

Then, the voltage stabilization control device 100 solves the formulas (6) to (12) to obtain constraint conditions during operation of each component of the power system 1000 such as the voltage regulator 1300, the power generation facility 1100, and the load facility 1200. The output vector (p _s ,q _s ) ^T that is the active power and the reactive power to be output to the voltage regulator 1300 is calculated so that the difference from the voltage stabilization vector r is minimized while satisfying (S1020).

Then, the voltage stabilization controller 100 outputs the output vector (p _s , q _s ) ^T to the voltage regulator 1300 (S1030).

By operating the voltage stabilization control device 100 in such a procedure, a new operating point is efficiently moved away from the power flow limit point while considering the constraint in the power system 1000, and the voltage stability of the power system 1000 is improved. It is possible to

Although the voltage stabilization control device 100, the control method of the voltage stabilization control device 100, and the control program 600 according to the present embodiment have been described above, the voltage of the power system 1000 is more reliably stabilized in this manner. It becomes possible to control.

The above-described embodiment is for facilitating the understanding of the present invention and is not for limiting the interpretation of the present invention. The present invention can be modified and improved without departing from the spirit thereof, and the present invention includes equivalents thereof.

100 Voltage Stabilization Control Device 102 Voltage Stabilization Vector Calculation Unit 103 Output Vector Calculation Unit 104 Output Vector Output Unit 110 CPU
120 memory 130 communication device 140 storage device 150 input device 160 output device 170 recording medium reading device 500 communication path 600 control program 700 data storage unit 800 recording medium 1000 power system 1100 power generation facility 1200 load facility 1300 voltage adjusting device

Claims (3)

A voltage stabilization control device for controlling a voltage regulator provided in a power system,
Using system information indicating the configuration and electrical characteristics of the power system, the voltage of the power system is repeatedly calculated while changing the active power and the reactive power of each load of the power system from the current values, and the power system The voltage stabilization vector r representing the amount of change in active power and reactive power of each load of the power system such that the voltage of using the voltage sensitivity vector e _r representing the variation of power and reactive power, the load margin up to the nearest power flow limit point and a predetermined positive coefficient k such that a predetermined value lambda, the, r = -k · a voltage stabilizing vector calculating unit for calculating the e _r,
An output vector that calculates active power and reactive power to be output to the voltage regulator as output vectors so that the difference with the voltage stabilization vector is minimized in a range that satisfies the constraint condition during operation of the voltage regulator. A calculator
An output vector output unit that outputs the output vector to the voltage regulator,
A voltage stabilization control device comprising: A method for controlling a voltage stabilization control device for controlling a voltage regulator provided in a power system, comprising:
The voltage stabilization control device, by using the system information indicating the configuration and electrical characteristics of the power system, the voltage of the power system while changing the active power and reactive power of each load of the power system from the current value. Is repeatedly calculated, and a voltage stabilization vector r representing the amount of change in active power and reactive power of each load of the power system such that the voltage of the power system rises is defined as the maximum slope of the voltage drop of the power system. and wherein the voltage sensitivity vector e _r representing the variation of the active power and reactive power of each load when made, the load margin up to the nearest power flow limit point and a predetermined positive coefficient k such that a predetermined value lambda, the using, calculated by _r = -k · _e r,
The voltage stabilization control device outputs active power and reactive power to the voltage regulator so that the difference between the voltage regulator and the voltage regulator is minimized within a range that satisfies the constraint condition during operation of the voltage regulator. Is calculated as the output vector,
The voltage stabilization control device outputs the output vector to the voltage adjustment device,
A control method for a voltage stabilization control device, comprising: In the voltage stabilization control device that controls the voltage regulator provided in the power system,
Using system information indicating the configuration and electrical characteristics of the power system, the voltage of the power system is repeatedly calculated while changing the active power and the reactive power of each load of the power system from the current values, and the power system The voltage stabilization vector r representing the amount of change in active power and reactive power of each load of the power system such that the voltage of using the voltage sensitivity vector e _r representing the variation of power and reactive power, the load margin up to the nearest power flow limit point and a predetermined positive coefficient k such that a predetermined value lambda, the, r = -k · and procedures to be calculated by e _r,
In a range satisfying the constraint condition during operation of the voltage regulator, a procedure for calculating active power and reactive power to be output to the voltage regulator as output vectors so that the difference with the voltage stabilization vector is minimized, ,
A step of outputting the output vector to the voltage regulator,
A program to execute.

Images