KR20150101804A - MPPT control for switching system of super capacitor with variable voltage - Google Patents

MPPT control for switching system of super capacitor with variable voltage Download PDF

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KR20150101804A
KR20150101804A KR1020140023539A KR20140023539A KR20150101804A KR 20150101804 A KR20150101804 A KR 20150101804A KR 1020140023539 A KR1020140023539 A KR 1020140023539A KR 20140023539 A KR20140023539 A KR 20140023539A KR 20150101804 A KR20150101804 A KR 20150101804A
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South Korea
Prior art keywords
voltage
output terminal
supercapacitor
relay switch
variable
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KR1020140023539A
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Korean (ko)
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KR101589556B1 (en
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유영실
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주식회사 씨윈피에스
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/20—Wind motors characterised by the driven apparatus
    • F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/66—Regulating electric power
    • G05F1/67—Regulating electric power to the maximum power available from a generator, e.g. from solar cell
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/04—Control effected upon non-electric prime mover and dependent upon electric output value of the generator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Abstract

The present invention delays a sudden variable input voltage outputted from a generator according to a wind speed by a series of relay switches connected in series and simultaneously outputs a desired voltage from a plurality of super capacitors connected in series, The present invention relates to a switching system for variable input voltage-compatible supercapacitors for controlling an MPPITTY to be transmitted to a vehicle, Rectifying means (206) connected to an output terminal of the generator (204) to generate a variable DC input voltage; A central processing unit (CPU) 208 connected to an output terminal of the rectifying unit 206 for checking a variable DC input voltage variably output from the rectifying unit 206 according to a predetermined program; At least one of the relay switches connected to the output terminal of the rectifying unit 206 and connected in series to the variable DC input voltage, which is electrically connected to one end of the see-through oil 208, ON); And a super capacitor is connected to an output terminal of the relay switch. When at least one of the relay switches is turned on, at least one of the supercapacitors is charged to generate a discharge voltage Stabilization means 212 and the like.

Figure P1020140023539

Description

BACKGROUND OF THE INVENTION [0001] The present invention relates to a switching system for a super-capacitor,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an MPPT (Maximum Power Point Tracking) control of a wind power generation system, and more particularly, to a method and apparatus for delaying a sudden variable input voltage output from a generator by a relay switch The present invention relates to a switching system for a variable input voltage-compatible supercapacitor for outputting a desired voltage from a plurality of super-capacitors connected in series and for outputting a constant voltage to an amplifier.

Recently, wind power generation is attracting attention as an environmentally friendly alternative energy source in preparation for depletion of fossil energy. Germany, the Netherlands, and Denmark have been doing much research on wind power generation since the 1970s in Western European countries. As a result, several MW wind power generation systems have been commercialized recently. Domestic research and development of wind power generation system is being actively carried out in many domestic research institutes. In addition, a large-scale domestic and overseas system has been installed in many regions such as Jeju Island through government-supported regional energy projects. The possibility is being examined.

In recent years, interest in small wind power generation systems of less than 10 kW has been increasing in Korea, and various types of applications such as wind street lamps and solar hybrid wind power generators are being developed. Korean Patent Laid-Open No. 10-2009-0086859 discloses a wind power generation system.

Large-scale wind power generation systems are designed to have a lifetime of about 20 years after installation, but the use life of small wind power generation systems is generally set to 5 to 10 years.

Accordingly, as the aging of the small wind turbine progresses, if the maximum power follow-up algorithm is applied using the initial torque reference curve, the maximum power point A can not be followed as shown in FIG.

Therefore, if the maximum power point is followed based on the parameters set at the initial stage without considering the aging due to the increase of the use time of the generator, the performance of the wind power generator is deteriorated.

In order to solve the above-mentioned problems, the application was filed with the Korean Intellectual Property Office by Application No. 10-2011-0134475, entitled "Wind Power Generation System and Control Method", dated December 14, 2011, A DC-DC converter that is connected to an output terminal of the generator to generate a DC voltage, a DC-DC converter that reduces or increases the rectified voltage according to a used capacity, And an MPPT control module controlling the PWM duty ratio of the DC-DC converter so as to follow a maximum power point tracking (Maximum Power Point Tracking), wherein the MPPT control module includes: When the amount of electric power for the rotational speed of the blade according to the actually measured wind speed is different from the electric power for the rotational speed of the blade according to the actual measured wind speed, Up table including a function of the torque with respect to the reference rotation speed of the blade according to the wind speed based on the power amount with respect to the rotation speed of the blades according to the wind speed and controlling the maximum power point to follow the corrected look- Power generation system. "

However, in the above-described conventional wind power generation system and control method thereof, since the abrupt variable input voltage outputted from the generator according to the wind speed must be corrected in the look-up table and follow the maximum power point by using the modified lookup table, There is a problem that it is not properly done.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to overcome the above problems, and it is an object of the present invention to provide a method and apparatus for delaying a sudden variable input voltage output from a generator to a relay switch connected in series, The present invention also provides a system for switching a variable-voltage-input supercapacitor for controlling a plurality of capacitors connected in series at a desired voltage level and for outputting a constant voltage to the amplifier.

However, the object of the present invention is not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a switching system for a variable input voltage supporting super capacitor,

A generator 204 for converting the electric energy into electric energy;

Rectifying means (206) connected to an output terminal of the generator (204) to generate a variable DC input voltage;

A central processing unit (CPU) 208 connected to an output terminal of the rectifying unit 206 for checking a variable DC input voltage variably output from the rectifying unit 206 according to a predetermined program;

At least one of the relay switches connected to the output terminal of the rectifying unit 206 and connected in series to the variable DC input voltage, which is electrically connected to one end of the see-through oil 208, ON);

And a super capacitor is connected to an output terminal of the relay switch. When at least one of the relay switches is turned on, at least one of the supercapacitors is charged to generate a discharge voltage Stabilization means 212;

The voltage stabilizing means 212 is connected to an output terminal of the voltage stabilizing means, and receives DC voltage discharged from the supercapacitor of the voltage stabilizing means. The DC voltage is applied to the DC voltage, and the DC voltage is transmitted to the inverter 216. MPPT (Maximum Power Point Tracking)

As described above, according to the present invention, the switching system for variable input voltage-responsive supercapacitor for controlling the MPPT is configured to delay the abrupt variable input voltage outputted from the generator according to the wind speed to a relay switch connected in series, And the output voltage is constantly sent to the MPI. Thus, the efficiency of the MPI is increased.

Particularly, since the present invention uses a supercapacitor, the installation cost of the system is small.

1 is a graph showing a maximum power point tracking characteristic applied to a power amount with respect to a rotational speed of a blade in accordance with a change in wind speed according to the aging of a wind power generator,
FIG. 2 is a schematic view showing a switching system for a variable input voltage-compatible supercapacitor for MPPIT control according to the present invention;
Fig. 3 is a detailed view of the rectifying means, the relay means and the voltage stabilizing means of Fig. 1. Fig.

Hereinafter, a preferred embodiment of a switching system for a variable input voltage-compatible supercapacitor for controlling MPI according to the present invention will be described.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

FIG. 2 is a schematic view of a switching system for a variable input voltage-compatible super capacitor according to an embodiment of the present invention. FIG. 3 is a detailed view of the rectifying means, the relay means and the voltage stabilizing means of FIG.

2 through 3, the switching system 200 for a variable input voltage-compatible supercapacitor according to the present invention includes:

A braid (202);

A generator 204 installed at the rear end of the braid 202 to convert the kinetic energy of the braid (i.e., wind energy) into electric energy;

Rectifying means 206 connected to an output terminal of the generator 204 to generate a DC voltage (also referred to as "variable DC input voltage");

A central processing unit (CPU) 208 connected to an output terminal of the rectifying unit 206 for checking a variable DC input voltage variably output from the rectifying unit 206 according to a predetermined program;

A first relay switch RY1 or a second relay switch RY2 connected in series according to a variable DC input voltage that is connected to the output terminal of the rectifying unit 206 and electrically connected to one end of the sight oil 208, Relay means 210 for turning on the relay switch RY2 or the third relay switch RY3 or ... or the N-th relay switch RYN;

.., SCN connected in series and the output terminal of the first relay switch (RY1) is connected to the first super-capacitor (SC1, SC2, The Nth supercapacitor SCN is connected to the output terminal of the capacitor SC1 and the second relay switch RY2 to the output terminal of the second supercapacitor SC2 to the Nth relay switch RYN,

When the first relay switch RY1 or the second relay switch RY2 or the third relay switch RY3 or ... or the N relay switch RYN is turned on, the first supercapacitor SC1 A voltage stabilizing means 212 for charging the first supercapacitor SC2 or charging the second supercapacitor SC2 or charging the Nth supercapacitor SCN to cause discharge;

A DC voltage discharged from the first supercapacitor SC1 of the voltage stabilizing means or a DC voltage discharged from the second supercapacitor SC2 or the N th super capacitor SC2 connected to the output terminal of the voltage stabilizing means 212, And a maximum power point tracking (MPPT) 214 for receiving a DC voltage discharged from the capacitor SCN and for tracking the applied DC voltage and for transmitting the DC voltage to the inverter 216 connected to the subsequent stage.

Here, the super capacitor (also referred to as a "superconductor") enhances the performance of a capacitor (capacitor), particularly the performance of a capacitance. The super capacitor is a component used for the purpose of a battery, a capacitor Has the same function as the rechargeable battery electrically. Collecting electric power and discharging it according to need is a basic purpose, and it is one of the necessary parts in order to operate an electronic circuit stably. It operates stably even after a long period of time in a repeated charge / discharge environment. It is usually used to supply small power when AC power is supplied from a power source and the power is disconnected. It is usually installed inside the device and is used for safety devices that temporarily supply power to the setting memory or operate in case of power failure.

The supercapacitor usually has a high capacity of 2.7V.

Meanwhile, the generator 204 may be a three-phase synchronous generator, and the rectifying unit 206 may use a three-phase bridge diode.

Hereinafter, the operation of the switching system of the variable input voltage-compatible supercapacitor for controlling the MPPITT configured as described above will be described as an example.

First, the braid 202 is operated by wind, and sends the obtained wind energy to the generator 204 connected to the rear end.

The generator 204 converts the wind energy into electricity of 270 V, for example, and sends it to the rectifying means 206 composed of a three-phase bridge diode connected to the output terminal of the generator 204.

The rectifying unit 206 generates rectified DC 270V, and then rectified DC 270V is connected to the first, second, third, ..., N-th relays To the relay means 210 comprising switches RY1, RY2, RY3, ..., RYN.

When DC 270V rectified from the rectifying unit 206 is applied, the sight oil 208 is checked for DC 270V by a predetermined program, and the first, second, third, ..., ..., N-th relay switches RY1, RY2, RY3, ..., RYN.

The relay unit 210 is connected to the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth relay switch RY1 , RY2, RY3, RY4, RY5, RY6, RY7, RY8, RY9, RY10) are turned ON.

The first, second, third, fourth, fifth, sixth, seventh, eighth, ninth and tenth relay switches RY1, RY2, RY3, RY4, RY5, RY6, RY7, RY8, RY9 Second, third, fourth, fifth, sixth, seventh, eighth, ninth and tenth relay switches RY1, RY2, RY3, RY4, The first supercapacitor SC1 of 2.7 V, the second supercapacitor SC2 of 2.7 V, the second supercapacitor SC2 of 2.7 V, and the second supercapacitor SC2 of the voltage stabilizer 212 connected to the resistors RY5, RY6, RY7, RY8, RY9, A third supercapacitor SC3, a 2.7V fourth supercapacitor SC4, a 2.7V fifth supercapacitor SC5, a 2.7V sixth supercapacitor SC6, a 2.7V seventh supercapacitor SC7, A 2.7V eighth supercapacitor SC8, a 2.7V 9th supercapacitor SC9 and a 2.7V tenth supercapacitor SC10 are charged (2.7V per one * 10 supercapacitors = 270V).

The voltage stabilization unit 212 discharges the DC voltage of 270V and sends the discharged DC voltage of 270V to MPPT (Maximum Power Point Tracking).

The Maximum Power Point Tracking (MPPT) 214 tracks the DC voltage of 270 V and sends the DC voltage to the inverter 216 connected to the rear end.

The foregoing description of the invention is merely exemplary of the invention and is used for the purpose of illustration only and is not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

200: Variable Input Voltage Supercapacitor Switching System for MPPTI Control
202: braid
204: generator
206: rectifying means
208: CPU (Central Processing Unit)
210: Relay means
212: voltage stabilization means
216: Inverter
214: Maximum Power Point Tracking (MPPT)

Claims (2)

A generator 204 for converting the electric energy into electric energy;
Rectifying means (206) connected to an output terminal of the generator (204) to generate a variable DC input voltage;
A central processing unit (CPU) 208 connected to an output terminal of the rectifying unit 206 for checking a variable DC input voltage variably output from the rectifying unit 206 according to a predetermined program;
At least one of the relay switches connected to the output terminal of the rectifying unit 206 and connected in series to the variable DC input voltage, which is electrically connected to one end of the see-through oil 208, ON);
And a super capacitor is connected to an output terminal of the relay switch. When at least one of the relay switches is turned on, at least one of the supercapacitors is charged to generate a discharge voltage Stabilization means 212;
The voltage stabilizing means 212 is connected to an output terminal of the voltage stabilizing means, and receives DC voltage discharged from the supercapacitor of the voltage stabilizing means. The DC voltage is supplied to the inverter 216, And a maximum power point tracking (MPPT) unit 214 for controlling the switching of the variable-voltage-compatible supercapacitor.
A braid (202);
A generator 204 installed at a rear end of the braid 202 to convert wind energy of the braid into electric energy;
Rectifying means (206) connected to an output terminal of the generator (204) to generate a variable DC input voltage;
A central processing unit (CPU) 208 connected to an output terminal of the rectifying unit 206 for checking a variable DC input voltage variably output from the rectifying unit 206 according to a predetermined program;
A first relay switch RY1 or a second relay switch RY2 connected in series according to a variable DC input voltage that is connected to the output terminal of the rectifying unit 206 and electrically connected to one end of the sight oil 208, Relay means 210 for turning on the relay switch RY2 or the third relay switch RY3 or ... or the N-th relay switch RYN;
.., SCN connected in series and the output terminal of the first relay switch (RY1) is connected to the first super-capacitor (SC1, SC2, The Nth supercapacitor SCN is connected to the output terminal of the capacitor SC1 and the second relay switch RY2 to the output terminal of the second supercapacitor SC2 to the Nth relay switch RYN,
When the first relay switch RY1 or the second relay switch RY2 or the third relay switch RY3 or ... or the N relay switch RYN is turned on, the first supercapacitor SC1 A voltage stabilizing means 212 for charging the first supercapacitor SC2 or charging the second supercapacitor SC2 or charging the Nth supercapacitor SCN to cause discharge;
A DC voltage discharged from the first supercapacitor SC1 of the voltage stabilizing means or a DC voltage discharged from the second supercapacitor SC2 or the N th super capacitor SC2 connected to the output terminal of the voltage stabilizing means 212, (MPPT) 214 for receiving a DC voltage discharged from the capacitor (SCN) and tracking it with the applied DC voltage and sending the DC voltage to the inverter (216) connected to the subsequent stage A switching system for a variable input voltage-compatible supercapacitor for an MPPTI control.








KR1020140023539A 2014-02-27 2014-02-27 MPPT control for switching system of super capacitor with variable voltage KR101589556B1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100993224B1 (en) * 2010-06-29 2010-11-09 주식회사 미지에너텍 Charging equipment of hybrid generating system
KR20120004202A (en) * 2010-07-06 2012-01-12 삼성중공업 주식회사 Standby power supply system for wind turbine system
EP2477299A2 (en) * 2010-12-21 2012-07-18 General Electric Company Power Conversion Control With Energy Storage
KR20130022920A (en) * 2011-08-26 2013-03-07 대우조선해양 주식회사 Method for low voltage ride through of wind power generator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100993224B1 (en) * 2010-06-29 2010-11-09 주식회사 미지에너텍 Charging equipment of hybrid generating system
KR20120004202A (en) * 2010-07-06 2012-01-12 삼성중공업 주식회사 Standby power supply system for wind turbine system
EP2477299A2 (en) * 2010-12-21 2012-07-18 General Electric Company Power Conversion Control With Energy Storage
KR20130022920A (en) * 2011-08-26 2013-03-07 대우조선해양 주식회사 Method for low voltage ride through of wind power generator

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