KR20180044718A - Method, apparatus and computer program for setting control curve of voltage-var and frequency-watt of smart distributed energy resource - Google Patents

Abstract

The present invention relates to a method for setting a voltage-reactive power and frequency-active power control curve of a smart distributed power source. A method for setting a voltage (V)-reactive power (Q) curve of a smart distributed power source comprises: a range setting step of setting a minimum value (V_(min)) and a maximum value (V_(max)) of a voltage, a minimum value (V_(DBmin)) and a maximum value (V_(DBmax)) of a dead band, and a maximum value (Q_(ave)) of reactive power which can be outputted; a voltage section dividing step of dividing a range from the voltage minimum value (V_(min)) to the voltage maximum value (V_(max)) into a predetermined number of voltage sections; a step of calculating a dV/dQ average value of each voltage section on the basis of a reactive power value and a voltage value of distributed power received from an integrated management system; and a step of setting a slope of a voltage-reactive power curve of each voltage section according to a calculated dV/dQ average value.

Description

METHOD, APPARATUS AND COMPUTER PROGRAM FOR SETTING CONTROL CURVE OF VOLTAGE-VAR AND FREQUENCY-WATT OF SMART DISTRIBUTED ENERGY RESOURCE}

The present invention relates to a method for setting a control curve of a smart distributed power supply in a power distribution system or a microgrid, and more particularly to a method of setting a control curve of a distributed power supply, And a method of setting a curve.

In order to effectively control each distributed power source in the distribution system or the micro grid, data such as voltage and current are collected, and voltage-reactive power and frequency-active power are indicated as control curves.

Conventionally, in order to set the control curve, the control variable directly controls the output command of the active power and the reactive power, not the inflection point of the curve. In this case, the voltage-reactive power or frequency- The parameter (inflexion point) of the active power curve could not be set. In addition, since each curve is represented by a single slope, it does not reflect the characteristics of the system that varies with each voltage section. Specifically, when the voltage-reactive power control curve is set, the voltage-reactive power sensitivity which varies depending on the system state and has a different value for each bus line of the system is not taken into consideration. In the case of setting the frequency / active power control curve, There is a problem in that inertia is not considered to be different.

SUMMARY OF THE INVENTION The present invention has been made to overcome the above problems, and it is an object of the present invention to improve voltage stability and reactive power efficiency in consideration of voltage-reactive power sensitivity (dV / dQ) and collected system information in the case of voltage- And,

In the case of setting the frequency-effective power control curve, the voltage of the smart distributed power supply improving the frequency stability and the effective power efficiency considering the economic loss due to the system inertia and the control of the distributed power generation, Power and frequency-effective power control curve.

The method of setting the voltage (V) - reactive power (Q) control curve of the smart distributed power source according to the first embodiment of the present invention,

Setting the voltage Min (V _min) and a maximum value (V _max), the voltage dead band Min (V _DBmin) and maximum value (V _DBmax), can be output reactive power maximum value (Q _avail) within the range allowed by the system defined ; Voltage region dividing step of dividing the voltage interval of the predetermined number of the range to the Min voltage (V _min) to the voltage maximum value (V _max); Calculating a dV / dQ average value of each voltage section based on a voltage value and a reactive power value of the distributed power source received from the integrated management system; And setting a slope of the voltage-reactive power curve of each of the voltage sections according to the calculated dV / dQ average value.

Here, the range setting step may include setting a period in which a voltage variation occurs at a predetermined frequency or more based on the nominal voltage value (1 pu) as a dead band of the voltage.

In the voltage division step, the widths of the voltage sections may be set differently based on the frequency of each voltage value received from the integrated management system.

The voltage (V) - reactive power (Q) control curve setting device of the smart distributed power source according to the first embodiment of the present invention,

(V _min ) and the maximum value (V _max ), the minimum dead band of the voltage (V _DBmin ) and the maximum value (V _DBmax ), and the maximum value of the reactive power that can be output (Q _avail ) A communication unit for receiving; The voltage Min (V _min) to the voltage maximum value the voltage value of the distributed power received from the integrated management system for dividing a voltage interval of a predetermined number of range of (V _max) (V) and the reactive power value (Q) A controller for calculating a dV / dQ average value of the voltage section and setting a curve slope of each voltage section based on the calculated dV / dQ average value; And a display unit for displaying the curve on the voltage-reactive power graph.

A method of setting a voltage (V) -learning power (Q) control curve of a smart distributed power source according to a second embodiment of the present invention,

(V _min ) and maximum value (V _max ) of the voltage, the minimum value of the dead band of the voltage (V _DBmin ) and the maximum value (V _DBmax ), the maximum value of the reactive power that can be output (Q _avail ) A range setting step of setting a maximum value (Q _{min, avail} ) of the reactive power when the output of the active power is the maximum, a minimum value and a maximum value of the slope of the curve; Receiving a dV / dQ value in real time from the integrated management system; And if the currently received dV / dQ is less than the previously received dV / dQ, it is set to be steeper than the previous voltage-reactive power curve slope within the range of the minimum to maximum value of the curve slope, DV / dQ < / RTI > may be less than the previous voltage-reactive power curve slope.

The voltage (V) - reactive power (Q) control curve setting device of the smart distributed power source according to the second embodiment of the present invention,

Integrated Management voltage allowed by the system defined by the system Min (V _min) and a maximum value (V _max), Min of the voltage dead band (V _DBmin) and maximum value (V _DBmax), the communication unit receiving the Min and the maximum value of the curve slope; DQ / dQ value from the integrated management system in real time, and if the currently received dV / dQ is less than the previously received dV / dQ, in the range of the minimum to maximum value of the curve slope, DV / dQ is greater than the previously received dV / dQ, and is set to be less than the previous voltage-reactive power curve slope; And a display unit for displaying the curve on the voltage-reactive power graph.

The method of setting the frequency (f) -actual power (W) control curve of the smart distributed power source according to the third embodiment of the present invention is as follows.

(F _min ) and the maximum value (f _max ) of the frequency, the minimum value of the dead band of the frequency (f _DBmin ) and the maximum value (f _DBmax ), the maximum value of the output power available (P _avail ), and A range setting step of setting a minimum value (P _min ) of an effective power satisfying a range in which a benefit due to frequency control becomes a loss due to a reduction in power generation amount; On the basis of the inertia of the system received from the integrated management system, the frequency dead band of the maximum value (f _DBmax) and outputs the maximum value of the available active power intersection point and the frequency of the (P _avail) dead band maximum value (f _DBmax) or more of an Setting a first fW curve connecting a specific point passing a minimum value (P _min ) of the active power in a range not exceeding the maximum value (f _max ) of the frequency; And setting a second fW curve at a position parallel to the first fW curve and spaced apart from the first fW curve by a dead band of the frequency.

Here, the step of setting the range may include a step of setting an interval in which the frequency variation occurs more than a predetermined frequency based on the nominal frequency value, as a dead band of the frequency.

Also, the step of setting the first fW curve may be such that when the inertia magnitude of the system becomes large, the specific point is brought close to the maximum value ( _fmax ) of the frequency, and when the inertia magnitude of the system becomes small, (F _DBmax ) of the frequency dead band.

The apparatus for setting the frequency (f) -actual power (W) control curve of the smart distributed power source according to the third embodiment of the present invention,

(F _min ) and maximum value (f _max ) of the frequency, the minimum value of the dead band of the frequency (f _DBmin ) and the maximum value (f _DBmax ), the maximum value of the available output power P _avail ); (P _min ) that satisfies a range in which a benefit due to frequency control is greater than a loss due to a reduction in power generation is set, and a maximum value (P _min ) of the frequency dead band is determined based on the inertia of the system received from the integrated management system f _DBmax) and displayed the intersection of the maximum value (P _avail) of the active power, and a maximum value (f _DBmax) or more of the frequency dead band Min of the effective power at the maximum value (f _max) less than or equal to the range of the frequency (P _min) And sets a second fW curve at a position parallel to the first fW curve and spaced apart from the first fW curve by a dead band of the frequency; And a display unit for displaying a hysteresis loop including the first fW curve and the second fW curve on the frequency-active power graph.

According to the voltage-reactive power and frequency-effective power control curve setting method of the smart distributed power source according to the present invention, it is possible to improve the voltage and frequency stability and to efficiently use reactive power and active power resources.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
FIG. 1 shows a procedure of a control curve setting method of a smart distributed power source according to a first embodiment of the present invention.
FIG. 2 is a graph showing an example of a control curve setting method of a smart distributed power source according to the first embodiment of the present invention.
3 is a table showing data collected and calculated from each bus in the integrated management system according to the present invention.
FIG. 4 shows a procedure of a control curve setting method of a smart distributed power source according to a second embodiment of the present invention.
5 is a graph showing an example of a control curve setting method of a smart distributed power source according to a second embodiment of the present invention.
FIG. 6 is a flowchart illustrating a method of setting a control curve of a smart distributed power source according to a third embodiment of the present invention.
7 is a graph illustrating an example of a control curve setting method of a smart distributed power source according to a third embodiment of the present invention.
FIG. 8 illustrates a control curve setting apparatus for a smart distributed power supply according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments will be described in detail below with reference to the accompanying drawings.

The following examples are provided to aid in a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, this is merely an example and the present invention is not limited thereto.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intention or custom of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification. The terms used in the detailed description are intended only to describe embodiments of the invention and should in no way be limiting. Unless specifically stated otherwise, the singular forms of the expressions include plural forms of meanings. In this description, the expressions "comprising" or "comprising" are intended to indicate certain features, numbers, steps, operations, elements, parts or combinations thereof, Should not be construed to preclude the presence or possibility of other features, numbers, steps, operations, elements, portions or combinations thereof.

It is also to be understood that the terms first, second, etc. may be used to describe various components, but the components are not limited by the terms, and the terms may be used to distinguish one component from another .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of a control curve setting method, a device and a computer program for a smart distributed power source according to the present invention will be described in detail with reference to the accompanying drawings.

Abbreviations used throughout this specification are set forth in Table 1 below.

V _min Minimum voltage value allowed by system regulations V _max Maximum voltage value allowed by system regulations V _DBmin Minimum dead band value of grid voltage V _DBmax Maximum dead band value of grid voltage Q _avail Maximum dead band value of grid voltage Q _{min, avail} Maximum output power value f _min Minimum frequency value allowed by the system regulations f _DBmin Minimum dead band value of the system frequency f _DBmax Maximum dead band value of the system frequency P _avail Maximum output power available P _min Active power value that can be generated by maximum decentralization of distributed power

A control curve setting method of a smart distributed power source according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. A first embodiment of the present invention relates to a method of setting a voltage (V) -reactivity (Q) curve of a smart distributed power source, and is a method of setting a curve for each section.

Referring to FIG. 1, a method of setting a control curve of a smart distributed power source according to a first embodiment of the present invention includes a range setting step S110, a voltage section dividing step S120, a dV / dQ average value calculating step S130, And a slope setting step (S140).

First, the control curve set in the Smart Distributed at S110 step device 100 Min (V of within the range of the voltage axis voltage Min (V _min), voltage maximum value (V _max), the voltage dead band from that permitted by the system defined _DBmin ), The maximum value of the dead band of the voltage (V _DBmax ), and the maximum value of the reactive power that can be output on the reactive power axis (Q _avail ). Here, the maximum value (Q _avail ) of the reactive power that can be output can be set based on the estimated active power output of the smart distributed power source and the inverter capacity. This step is a step of setting the boundary at which the voltage-reactive power curve is to be displayed.

2, the control curve of the smart distributed power source according to the first embodiment of the present invention is shown in a graph in which the voltage V is the x-axis and the reactive power Q is the y-axis . Voltage value can be shown in the range of in the range from the voltage Min (V _min) to the voltage maximum value (V _max), to the reactive power value is the maximum value can be output reactive power (Q _avail) of.

Furthermore, Min voltage (V _min) to the maximum value voltage has a maximum value (V _DBmax) of Min (V _DBmin) and the dead band of the dead band of the voltage within the range (V _max) may be set. The dead band of the voltage may be set to a specific period in which the variation of the voltage occurs over a predetermined frequency based on the nominal voltage value (1 pu) collected and calculated from the integrated management system (200).

In step S120, the range from the minimum voltage value to the maximum voltage value can be divided into a plurality of voltage sections. One straight line having a specific slope can be set in one voltage section.

Referring to FIG. 2, a method of dividing a voltage interval may be used to refer to a voltage distribution during a day of a bus connected to a distributed power source based on data received by the integrated management system 200, (The red dot in FIG. 2), the voltage control range section can be divided.

The number of divided voltage sections can be set differently according to the user's intention and purpose. If the control curve is to be shown in more detail, the number of voltage divisions to be divided can be increased, and if the control curve is to be represented only in a rough manner, the number of divided voltage divisions can be reduced.

In step S130, the voltage value and the reactive power value of the distributed power source are received from the integrated management system 200, and the dV / dQ average value of each voltage section can be calculated using the voltage value and the reactive power value.

Referring to FIG. 3, the integrated management system 200 mediates a plurality of busbars and a control curve setting apparatus 100 of a smart distributed power source according to the present invention. The grid data can be continuously collected and stored at predetermined time intervals from the bus line, and the power generation amount, load, voltage-reactive power sensitivity (dV / dQ) and the like can be calculated using the stored data for each time period. The dV / dQ can be calculated using a method of taking an inverse matrix in a Jacobian matrix or the like.

 The system data and the calculated values may be transmitted to the control curve setting apparatus 100 of the smart distributed power source. The systematic data may include information such as voltage, current, and systematic inertia for each bus of the system.

FIG. 3 shows an example of a daily curve determination method for collecting and calculating systematic data in units of 30 minutes. However, if there is sufficient data, it is also possible to set a time unit, a day of the week, a month, or a time unit between off- .

In step S140, the voltage-reactive power control curve can be set as shown in FIG. 2 by using the average value of dV / dQ calculated for each voltage section as the linear slope of the corresponding voltage section.

 The slope of the dV / dQ average value can be set relatively steeply in the voltage section where the dV / dQ average value is relatively large, and the slope can be set steeply in the voltage section in which the dV / dQ average value is relatively small.

The first embodiment of the present invention is a method that can be effectively used when the width of dV / dQ varies with voltage interval and time slot.

A control curve setting method of a smart distributed power source according to a second embodiment of the present invention will be described with reference to FIGS. 4 and 5. FIG. A second embodiment of the present invention relates to a method for setting a voltage (V) -reactivity (Q) curve of a smart distributed power source, and is a method for continuously updating the slope of a curve.

Referring to FIG. 4, a method of setting a control curve of a smart distributed power source according to a second embodiment of the present invention includes a range setting step S210, a dV / dQ value calculation step S220, dQ and the previously received dV / dQ (S230), and adjusting the curve slope (S242, S244) accordingly.

First, in step S210 the control curve set in the Smart Distributed device 100 Min (V ranging voltage voltage axis in the Min (V _min), voltage maximum value (V _max), the voltage of the dead band allowed by the system defined _DBmin ), The maximum value of the dead band of the voltage (V _DBmax ), the maximum value of the reactive power that can be output (Q _avail ), the maximum value of the reactive power (Q _{min, avail} ) when the output of the active power is the maximum, Can be set. This step is a step of setting the boundary at which the voltage-reactive power curve is to be displayed.

The maximum value (Q _{min, avail} ) of the reactive power when the output of the active power is the maximum can be set based on the data received from the integrated management system 200. In addition, the minimum value and the maximum value of the curve slope can be set to be equal to the minimum value and the maximum value of dV / dQ received from the integrated management system 200, respectively. In addition, the dead band and the maximum value Q _avail of the reactive power that can be output can be set in the same manner as the method described in step S110.

In step S220, the integrated management system 200 may receive the voltage-reactive power sensitivity (dV / dQ) value in real time and at predetermined time intervals. For the purposes of this embodiment, it is desirable that the time period be set as short as possible.

In step S230, the currently received dV / dQ and the previously received dV / dQ can be compared. Here, 'previously received dV / dQ' depends on the reception period of dV / dQ set in the previous step (S220). That is, if dV / dQ is received at 1 second intervals and the current time is 8:10:31 AM, 'Previously received dV / dQ' means the value received at 8:10:30 AM.

Referring to FIG. 5, if the red dot is the current operating point and dV / dQ received before dV / dQ is greater than the currently received dV / dQ in step S230, the slope of the voltage- (S242). If the dV / dQ received prior to the currently received dV / dQ is smaller, the slope of the voltage-reactive power curve of the corresponding section is set to a slope of the violet point more steeper than before (S244). The slope of the curve can be set within a range from the minimum value to the maximum value of the curve slope set in the preceding step S210.

The second embodiment of the present invention is a method that can be effectively used in the integrated management system 200 in which the voltage does not change significantly over time or the calculation speed is high.

A control curve setting method of a smart distributed power source according to a third embodiment of the present invention will be described with reference to FIGS. 6 and 7. FIG. A third embodiment of the present invention relates to a method of setting a frequency (f) - an effective power (W) curve of a smart distributed power source, wherein a curve of a renewable energy source such as solar or wind power, .

Referring to FIG. 6, a method of setting a control curve of a smart distributed power source according to a third embodiment of the present invention includes a range setting step S310, a first fW curve setting step S320, and a second fW curve and hysteresis loop setting step (S330).

First, the control curve set in the Smart Distributed at S310 step device 100 Min of the frequency (f) shaft frequency in the range allowed by the system rules (f _min) and maximum value (f _max), Min of the dead band frequency (P _avail ) of the available active power of the axis (f _DBmin ) and the maximum value (f _DBmax ), the active power (W) axis, and the minimum value of the effective power (P _min ) can be set. This step is to set the boundary to which the frequency-effective power curve is to be displayed. Min of the active power (P _min) is quantify the benefits due to the loss and the frequency sub-control due to the reduction of power generation amount, respectively, with a loss due to a reduction in the power generation amount can gambal does not exceed the gain from a frequency sub-control Means the lowest effective power value.

7, the control curve of the smart distributed power supply according to the third embodiment of the present invention can be shown in a graph where the frequency f is the x axis and the effective power W is the y axis have. Frequency value Min (P of the active power to within the range of up to Min (f _min) to the maximum value (f _max) of said frequency, real power value satisfies the range that is beneficial due to the frequency control loss than due to reduced generation _min to the maximum value of the available output power (P _avail ).

Also, the minimum dead band (f _DBmin ) of the dead band of the frequency and the dead band maximum value (f _DBmax ) of the frequency within the range from the minimum value (f _min ) to the maximum value (f _max ) of the frequency can be set. The dead band of the frequency may be set to a specific interval in which the frequency variation occurs more than a predetermined frequency based on the nominal frequency value collected and calculated by the integrated management system 200. [ In Korea, the nominal frequency value is 60 Hz.

In S320 step on the basis of the inertia of the system received from the integrated management system 200, and the intersection point (X point of Fig. 7) of the frequency dead band of the maximum value (f _DBmax) and the maximum value of the output potential of active power (P _avail) the frequency dead band of the maximum value (f _DBmax) not more than the 1 fW curve from the maximum value (f _max) less than or equal to the range of the frequency connecting the Min (P _min), the specific point (a point in FIG. 7) passing through the effective power Can be set.

The maximum and minimum inertia values of the system are set at the discretion of the system operator so that the system having the maximum inertia value is set to the maximum slope and the system having the minimum inertia value is set to the minimum slope. If the size increases there and close to the frequency maximum value (f _max) to said specific point (a point in FIG. 7), the inertial amount of the system becomes smaller, the maximum value of the particular point the frequency dead band (f _DBmax The slope of the first fW curve can be adjusted.

In step S330, a second f-W curve may be set in a position parallel to the first f-W curve and spaced apart from the first f-W curve by a dead band of the frequency.

Thereby, a hysteresis loop drawn by P _avail , a first fW curve, P _min and a second fW curve can be set, the hysteresis loop follows a blue curve when the frequency increases and follows a red curve when the frequency decreases .

FIG. 8 illustrates a control curve setting apparatus for a smart distributed power supply according to the present invention.

8, the smart curve power supply control curve setting apparatus 100 may include a communication unit 110, a control unit 120, and a display unit 130, Lt; / RTI > Also, if necessary, the method of the first to third embodiments of the present invention can be performed. Hereinafter, each embodiment will be described separately.

- a device according to the first embodiment of the present invention

The communication unit 110 is a voltage allowed by the system defined from the integrated management system 200 Min (V _min) and a maximum value (V _max), the voltage dead band Min (V _DBmin) and maximum value (V _DBmax), printable invalid And can receive the maximum value of power (Q _avail ).

The control part 120 is the voltage Min (V _min) to the voltage maximum value (V _max), the voltage value (V) and a reactive power, is divided by the voltage interval of a predetermined number from the scope of the distributed power received from the integrated management system The dV / dQ average value of the voltage section may be calculated based on the value Q to set the curve slope of each voltage section.

The display unit 130 may display the curve on the voltage-reactive power graph.

- a device according to the second embodiment of the present invention

The communication unit 110 voltage Min (V _min) and a maximum value (V _max) of the voltage dead band Min (V _DBmin) and maximum value (V _DBmax) allowed by the system defined from the integrated management system 200, the curve slope The minimum value and the maximum value can be received.

The control unit 120 calculates the dV / dQ value in real time based on the voltage value V and the reactive power value Q received from the integrated management system 200 and calculates the dV / dQ value in the range of the minimum to maximum value of the curve slope Reactive power curve slope when the dV / dQ decreases, and when the dV / dQ decreases, the curve slope can be set to be set more gently than the current voltage-reactive power curve slope.

The display unit 130 may display the curve on the voltage-reactive power graph.

- a device according to the third embodiment of the present invention

The communication unit 110 Min (f _DBmin) of Min (f _min) and maximum value (f _max), the frequency dead band of the frequency (f) shaft frequency in the range allowed by the system defined from the integrated management system 200 and The maximum value (f _DBmax ) of the active power (W), and the maximum value (P _avail ) of the available output power of the active power (W) axis.

The control unit 120 sets the minimum value of the effective power P _min that satisfies the range in which the profit due to the frequency control becomes greater than the loss due to the reduction in the power generation amount, and, based on the inertia of the system received from the integrated management system, (f _DBmax ) of the frequency dead band and a maximum value (f _max ) of the frequency, and an intersection of a maximum value (f _DBmax ) of the dead band and a maximum value (P _avail ) Sets a first fW curve connecting a specific point passing through the minimum value P _min and sets a second fW curve at a position parallel to the first fW curve and spaced apart from the first fW curve by a dead band of the frequency Can be set.

The display unit 130 may display a hysteresis loop including the first f-W curve and the second f-W curve on the frequency-active power graph.

Meanwhile, the embodiments of the present invention described above can be written in a program that can be executed in a computer, and the created program can be stored in a medium.

The medium may be a storage such as a magnetic storage medium (e.g., ROM, floppy disk, hard disk, etc.), an optical reading medium (e.g. CD ROM, DVD, etc.) and a carrier wave Media, but is not limited thereto.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments described in the present invention are not intended to limit the technical spirit of the present invention, but are intended to be illustrative and not restrictive. The scope of protection of the present invention should be construed by the following claims, and all technical ideas within the scope of equivalents thereof should be construed as being included in the scope of the present invention.

100: control curve setting device 110:
120: control unit 130: display unit
200: Integrated management system

Claims (11)

In a voltage (V) - reactive power (Q) curve setting method of a smart distributed power source,
Setting the voltage Min (V _min) and a maximum value (V _max), the voltage dead band Min (V _DBmin) and maximum value (V _DBmax), can be output reactive power maximum value (Q _avail) within the range allowed by the system defined ;
Voltage region dividing step of dividing the voltage interval of the predetermined number of the range to the Min voltage (V _min) to the voltage maximum value (V _max);
Calculating a dV / dQ average value of each voltage section based on a voltage value and a reactive power value of the distributed power source received from the integrated management system; And
And setting a slope of a voltage-reactive power curve of each of the voltage sections according to the calculated dV / dQ average value.
The method according to claim 1,
The range setting step may include:
And setting a dead band of a voltage where a voltage variation occurs more than a predetermined frequency based on a nominal voltage value (1 pu) as a dead band of the voltage.
The method according to claim 1,
The voltage division step may include:
Wherein a width of the voltage section is set differently based on the frequency of each voltage value received from the integrated management system.
(V _min ) and the maximum value (V _max ), the minimum dead band of the voltage (V _DBmin ) and the maximum value (V _DBmax ), and the maximum value of the reactive power that can be output (Q _avail ) A communication unit for receiving;
The voltage Min (V _min) to the voltage maximum value the voltage value of the distributed power received from the integrated management system for dividing a voltage interval of a predetermined number of range of (V _max) (V) and the reactive power value (Q) A controller for calculating a dV / dQ average value of the voltage section and setting a curve slope of each voltage section based on the calculated dV / dQ average value; And
And a display unit for displaying the curve on a voltage-reactive power graph.
In a voltage (V) - reactive power (Q) curve setting method of a smart distributed power source,
(V _min ) and maximum value (V _max ) of the voltage, the minimum value of the dead band of the voltage (V _DBmin ) and the maximum value (V _DBmax ), the maximum value of the reactive power that can be output (Q _avail ) A range setting step of setting a maximum value (Q _{min, avail} ) of the reactive power when the output of the active power is the maximum, a minimum value and a maximum value of the slope of the curve;
Receiving a dV / dQ value in real time from the integrated management system; And
If the currently received dV / dQ is less than the previously received dV / dQ, it is set to be steeper than the previous voltage-reactive power curve slope within the range of the minimum value and the maximum value of the curve slope, DV / dQ < / RTI > of the smart distributed power supply, setting the slope to be less than the previous voltage-reactive power curve slope.
Integrated Management voltage allowed by the system defined by the system Min (V _min) and a maximum value (V _max), Min of the voltage dead band (V _DBmin) and maximum value (V _DBmax), the communication unit receiving the Min and the maximum value of the curve slope;
DQ / dQ value from the integrated management system in real time, and if the currently received dV / dQ is less than the previously received dV / dQ, in the range of the minimum to maximum value of the curve slope, DV / dQ is greater than the previously received dV / dQ, and is set to be less than the previous voltage-reactive power curve slope; And
And a display unit for displaying the curve on a voltage-reactive power graph.
In the method of setting the frequency (f) - the active power (W) curve of the smart distributed power source,
(F _min ) and the maximum value (f _max ) of the frequency, the minimum value of the dead band of the frequency (f _DBmin ) and the maximum value (f _DBmax ), the maximum value of the output power available (P _avail ), and A range setting step of setting a minimum value (P _min ) of an effective power satisfying a range in which a benefit due to frequency control becomes a loss due to a reduction in power generation amount;
On the basis of the inertia of the system received from the integrated management system, the frequency dead band of the maximum value (f _DBmax) and outputs the maximum value of the available active power intersection point and the frequency of the (P _avail) dead band maximum value (f _DBmax) or more of an Setting a first fW curve connecting a specific point passing a minimum value (P _min ) of the active power in a range not exceeding the maximum value (f _max ) of the frequency; And
And setting a second fW curve at a position parallel to the first fW curve and spaced apart from the first fW curve by a dead band of the frequency.
8. The method of claim 7,
The range setting step may include:
And setting a dead band of a frequency where a frequency variation occurs more than a predetermined frequency based on a nominal frequency value.
8. The method of claim 7,
Wherein setting the first fW curve comprises:
Close-up if large inertial size of the grid there was proximity to the specific point to the maximum value (f _max) of the frequency, if the inertial amount of the system becomes smaller, the maximum value (f _DBmax) of the particular point the frequency dead band And a control curve setting unit for setting a control curve of the smart distributed power supply.
(F _min ) and maximum value (f _max ) of the frequency, the minimum value of the dead band of the frequency (f _DBmin ) and the maximum value (f _DBmax ), the maximum value of the available output power P _avail );
(P _min ) that satisfies a range in which a benefit due to frequency control is greater than a loss due to a reduction in power generation is set, and a maximum value (P _min ) of the frequency dead band is determined based on the inertia of the system received from the integrated management system f _DBmax) and displayed the intersection of the maximum value (P _avail) of the active power, and a maximum value (f _DBmax) or more of the frequency dead band Min of the effective power at the maximum value (f _max) less than or equal to the range of the frequency (P _min) And sets a second fW curve at a position parallel to the first fW curve and spaced apart from the first fW curve by a dead band of the frequency; And
And a display unit for displaying a hysteresis loop including the first fW curve and the second fW curve on the frequency-active power graph.
A computer program stored in a medium for executing a control curve setting method of a smart distributed power source according to any one of claims 1 to 3, 5, and 7 to 9 in combination with hardware.

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