KR20170078989A - Quality evaluation Method of standby Generator-EESS operating system - Google Patents

Abstract

When the EESS supplies power to the load when the power supplied from the system is cut off and the emergency power is supplied to the load by performing the power switching operation after the emergency generator is started, the quality of the voltage fluctuation and the load power is evaluated, An emergency generator-EESS linked operating system for determining safety and a method for evaluating its quality are disclosed.
A method of evaluating the quality of an emergency generator-EESS linked operating system includes the steps of: supplying power to the load when the power supplied from the system is shut off; Measuring power information from a power source of the EESS; Operating the emergency generator to produce an emergency power source; Measuring power information from an emergency power source of the emergency generator; Receiving power information of the EESS and the emergency generator and determining a power quality range of the data; When the power quality range satisfies the reference range, performing power supply switching operation to supply power to the load to the emergency generator; Informing the user if the power quality range does not meet the reference range; Measuring power information of a power source supplied to the load; Receiving power information of the load and determining a power quality range of the data; Shutting off the power supply of the EESS supplied to the load when the power quality range satisfies the reference range; And notifying the user if the power quality range does not satisfy the reference range.
According to the present invention, by monitoring the EESS and the emergency generator, it is possible to secure a reliable power quality of the system.
In addition, the monitoring data is provided to the user in the field, so that it is possible to prevent the occurrence of the abnormality or the accident of the facility.

Description

[0001] The present invention relates to an emergency generator-EESS-linked operating system,

[0001] The present invention relates to an operating system and a method for evaluating the quality of an emergency generator and an electric energy storage system (EESS) linked to each other. More particularly, An emergency generator-EESS linked operating system for evaluating the electrical stability of the system by evaluating the quality of the voltage fluctuation and the load power in the process of supplying the emergency power to the load by performing the power supply switching operation after operating the emergency generator, And a quality evaluation method.

In general, ESS (Energy Storage System) is a system that stores power and supplies it when it is needed, thereby improving power utilization efficiency.

When the electricity rate is low, it can be used at the peak time when the electricity rate is high after saving the electricity, which can bring innovation to the demand management.

Production-consumption "paradigm, which must be consumed at the same time as production, is replaced with a" production-storage-consumption "paradigm.

And, the ESS (Energy Storage System) is used to stably connect the power generated from renewable energy to the power system.

Renewable energy is electric energy generated by solar power or wind power generation, and it is disadvantageous that power production stability is poor.

However, new and renewable energy combined with ESS can stabilize renewable output such as solar and wind power, and increase efficiency of energy utilization. Therefore, major energy powerhouses concentrate on energy as core growth engine.

In addition, the ESS stores excess power generated by a battery using a LIB (Li-Ion Battery), and discharges the power when the power is insufficient to stabilize the power supply and demand.

In other words, the ESS improves the efficiency of power utilization by accumulating and storing new renewable energy that is gathered when power demand is low, and then using the power stored in the peak time period with high power demand.

An uninterruptible power supply system (UPS) converts a commercial AC power to a DC power through a rectifier, stores the converted DC power in a battery through a charger, or supplies AC power to the load through an inverter And supplies AC power to the load through the inverter when the commercial AC power source experiences an abnormal phenomenon such as power failure, instantaneous power failure, or voltage fluctuation.

Therefore, the uninterruptible power supply is widely used in power supplies requiring high stability and reliability such as communication systems, medical systems, broadcasting equipment, and electronic calculators.

However, when the power supplied from the system is cut off for a long time due to an unexpected power failure such as a lightning strike, the power supply through the battery is limited.

To this end, an uninterruptible power supply unit based on an emergency generator is installed. When an abnormality occurs in the power supplied from the system, the emergency generator is activated to supply emergency power to the load.

However, when the uninterruptible power supply unit is constructed by connecting the ESS and the emergency generator to supply the emergency power of the ESS and the emergency generator to the load by performing the power switching operation, synchronization of the ESS and the emergency generator power There is a problem that an overvoltage or a low voltage is generated in the load and an accident occurs in the power distribution system.

Korean Patent No. 1098505 (issued on December 26, 2011)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide an EESS and an emergency generator in which power fluctuation and load power quality during a power- The purpose of the evaluation is to determine the electrical safety of the system.

According to an aspect of the present invention, there is provided an emergency generator-

Emergency generator that supplies EESS power to the load when the power supplied from the grid is supplied to the load, generates emergency power by operating the emergency generator, cuts off the power of the EESS by performing the power switching operation, and supplies the emergency power to the load. As an EESS linked operating system,

And a measurement server electrically connected to the EESS, the emergency generator, and the load to measure power information.

The measurement server,

An EESS measuring unit for measuring power information from the power source of the EESS;

An emergency generator measuring unit for measuring power information from an emergency power source of the emergency generator;

A load measuring unit for measuring power information from a power source supplied to the load for detecting an abnormal state of the load;

An alarm unit for generating an alarm and a signal to the user;

A controller for controlling the EESS measuring unit, the emergency generator measuring unit, and the load measuring unit, receiving the measured power information, determining a power quality range of the data, and controlling the alarm unit to inform the user when the determination result is out of the reference range .

According to an aspect of the present invention, there is provided a method for evaluating the quality of an emergency generator-EESS-

Emergency generator that supplies EESS power to the load when the power supplied from the grid is supplied to the load, generates emergency power by operating the emergency generator, cuts off the power of the EESS by performing the power switching operation, and supplies the emergency power to the load. A method for evaluating the quality of an EESS linked operating system,

Supplying power to the load when the power supplied from the system is interrupted;

Controlling the EESS measuring unit to measure power information from the power source of the EESS;

Operating the emergency generator to produce an emergency power source;

The control unit controlling the emergency generator measurement unit to measure power information from an emergency power source of the emergency generator;

The control unit receiving power information from the EESS measurement unit and the emergency generator measurement unit and determining a power quality range of the data;

When the power quality range satisfies the reference range, performing power supply switching operation to supply power to the load to the emergency generator;

And if the power quality range does not satisfy the reference range, the control unit controls the alarm unit to inform the user.

The control unit controls the load measuring unit to measure power information from a power source supplied to the load.

The control unit receiving power information from the load measuring unit and determining a power quality range of the data;

Shutting off the power supply of the EESS supplied to the load when the power quality range satisfies the reference range;

And if the power quality range does not satisfy the reference range, the control unit controls the alarm unit to inform the user.

INDUSTRIAL APPLICABILITY As described above, the emergency generator-EESS linked operating system and its quality evaluation method according to the present invention,

By monitoring the EESS and the emergency generator, reliable power quality of the system can be ensured.

In addition, the monitoring data is provided to the user in the field, so that it is possible to prevent the occurrence of the abnormality or the accident of the facility.

1 is a block diagram illustrating an emergency generator-EESS coordinated operation system according to an embodiment of the present invention.
2 is a block diagram illustrating an example of an emergency generator-EESS coupled operation system according to an embodiment of the present invention.
3 is a flowchart sequentially illustrating a method for evaluating the quality of an emergency generator-EESS coupled operation system according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise. Also, the terms " part, "" ... "," module ", and the like described in the specification mean units for processing at least one function or operation, and may be implemented by hardware or software or a combination of hardware and software .

Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings.

Like reference symbols in the drawings denote like elements.

FIG. 1 is a block diagram showing an emergency generator-EESS coordinated operation system according to an embodiment of the present invention. FIG. 2 is a block diagram showing an example of an emergency generator-EESS coordinated operation system according to an embodiment of the present invention. to be.

1 to 2, the present invention includes an electrical energy storage system (EESS) 100, an emergency generator 200, a load 300, a system 400, and a measurement server 500 .

The system 400 is supplied with commercial power and supplies power to the load 300.

The electrical energy storage system 100 is electrically connected to the load 300. When an abnormality occurs in the power supplied from the system 400, the electrical energy storage system 100 is connected to the load 300, Supply power.

The emergency generator 200 generates and supplies an emergency power source to the load 300 when an abnormality occurs in the power source supplied from the system 400.

An EESS switch 110 is provided between the EESS 100 and the load 300 to selectively supply and cut off power supplied from the EESS 100 to the load 300.

A generator switch 210 is provided between the emergency generator 200 and the load 300 to selectively supply and shut off the power supplied from the emergency generator 200 to the load 300.

The measurement server 500 is electrically connected to the EESS 100, the emergency generator 200, and the load 300 to measure power information.

In addition, the measurement server 500,

An EESS measuring unit 510 for measuring power information from the power source of the EESS 100;

An emergency generator measurement unit 520 for measuring power supply information from the emergency power supply of the emergency generator 200;

A load measuring unit 530 for measuring power information from a power source supplied to the load 300 for detecting an abnormal state of the load 300;

An alarm unit 540 for generating an alarm and a signal to the user;

Controls the EESS measuring unit 510, the emergency generator measurement unit 520, and the load measuring unit 530, receives the measured power information and determines the power quality range of the data, and when the determination result is out of the reference range And a control unit 550 controlling the alarm unit 540 to inform the user.

Here, the power source information includes at least one of a voltage, a current, a frequency, and an active power.

However, the power supply information is not limited to this, and other power supply information may be included according to the needs of the user.

The power quality range includes a Sag (instantaneous voltage drop), a Swell (instantaneous voltage rise), a voltage THD (Total Harmonic Distortion), a flicker (flicker) And voltage synchronizing of the EESS 100.

Likewise, the power quality range is not limited to this, and other power quality ranges may be included according to the needs of the user.

A description will now be given of a method for evaluating the quality of an emergency generator-EESS linked operating system having such a configuration.

3 is a flowchart sequentially illustrating a method for evaluating the quality of an emergency generator-EESS coupled operation system according to an embodiment of the present invention.

As shown in FIG. 3, when the power supplied from the system 400 is shut off, the power of the EESS 100 is supplied to the load 300, the emergency generator 200 is operated to produce an emergency power source, EESS (100), and supplying the emergency power to the load, the method comprising the steps of:

(S10) of supplying power to the load (300) when the power supplied from the system (400) is shut off;

The control unit 550 controls the EESS measurement unit 510 to measure power information from the power source of the EESS 100 (S20);

(S30) the emergency generator (200) is activated to produce an emergency power source;

The control unit 550 controls the generator measurement unit 520 to measure power information from the emergency power source of the emergency generator 200 (S40);

The control unit 550 receives the power information from the EESS measuring unit 510 and the generator measuring unit 520 and determines a power quality range of the data (S50).

(S60) if the power quality range satisfies the reference range, performing power supply switching operation to supply the power of the emergency generator (200) to the load (300);

If the power quality range does not satisfy the reference range, the control unit 550 controls the alarm unit 540 to inform the user (S70).

The control unit 550 controls the load measuring unit 530 to measure power information from the power source supplied to the load 300 (S80).

The control unit 550 receives the power information from the load measuring unit 530 and determines a power quality range of the data (S90);

(S100) powering off the EESS 100 supplied to the load 300 when the power quality range satisfies the reference range;

If the power quality range does not satisfy the reference range, the control unit 550 controls the alarm unit 540 to inform the user of the alarm unit 540 (S110).

This will be described in detail as follows.

When the power supplied to the load 300 from the system 400 is cut off, the EESS 100 supplies power to the load 300.

The control unit 550 of the measurement server 500 controls the EESS measuring unit 510 to measure the power supply information of the power supplied from the EESS 100 to the load 300. [

Here, the power source information includes at least one of a voltage, a current, a frequency, and an active power.

However, the power supply information is not limited to this, and other items may be measured according to the needs of the user.

Then, the emergency generator 200 is operated to produce an emergency power source.

Here, the generator switch 210 is in an OFF state, and the power of the emergency generator 200 is not supplied to the load 300.

The control unit 550 controls the emergency generator measurement unit 520 to measure power information from the power source of the emergency generator 200.

Also, the controller 550 receives the power information measured by the EESS measurement unit 510 and the emergency generator measurement unit 520, and determines the power quality range.

Here, the power quality range includes a Sag (instantaneous voltage drop), a Swell (instantaneous voltage rise), a voltage THD (Total Harmonic Distortion), a flicker and a flicker, And voltage synchronizing of the EESS 100.

However, the power quality range is not limited thereto, and other power quality range items may be included according to the needs of the user.

If the result of the determination of the power quality range of the controller 550 does not satisfy the reference range, the controller 550 controls the alarm unit 540 to generate an alarm or a signal to inform the user.

In addition, the generator switch 210 maintains the OFF state, and the power source of the emergency generator 200 is not supplied to the load 300.

If the determination result of the power quality range of the controller 550 satisfies the reference range, the generator switch 210 is connected to supply the power of the emergency generator 200 to the load 300.

Also, the control unit 550 controls the load measuring unit 530 to measure the power supply information of the power supplied to the load 300.

The control unit 550 receives the power information from the load measuring unit 530 and determines the power quality range of the data to detect the abnormal state of the load 300. [

Here, the generator switch 210 and the EESS switch 110 are both connected, and the EESS 100 and the emergency generator 200 are connected in parallel to supply power to the load 300.

If the power quality range of the power supplied to the load 300 does not satisfy the reference range, the controller 550 controls the alarm unit 540 to generate an alarm or a signal to inform the user .

When the power quality range of the power supplied to the load 300 satisfies the reference range, the power of the EESS 100 supplied to the load 300 is turned off by turning off the EESS switch 110 Only the power source of the emergency generator 200 is supplied to the load 300. [

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And all changes to the scope that are deemed to be valid.

100: EESS 110: EESS switch
200: emergency generator 210: generator switch
300: load 400: system
500: Measurement server 510: EESS measurement part
520: generator measurement unit 530: load measurement unit
540: an alarm unit 550:

Claims (5)

Emergency generator that supplies EESS power to the load when the power supplied from the grid is supplied to the load, generates emergency power by operating the emergency generator, cuts off the power of the EESS by performing power switching operation, and supplies the emergency power to the load. As an EESS linked operating system,
A measurement server electrically connected to the EESS, the emergency generator and the load to measure power information,
The measurement server comprises:
An EESS measuring unit for measuring power information from the power source of the EESS;
A generator measuring unit for measuring power information from an emergency power source of the emergency generator;
A load measuring unit for measuring power information from a power source supplied to the load for detecting an abnormal state of the load;
An alarm unit for generating an alarm and a signal to the user;
A controller for controlling the EESS measuring unit, the generator measuring unit, and the load measuring unit, receiving the measured power information, determining a power quality range of the data, and controlling the alarm unit to inform the user when the determination result is out of the reference range; And an emergency generator-EESS linked operating system.
The method according to claim 1,
Wherein the power information includes at least one of a voltage, a current, a frequency, and an active power.
The method according to claim 1,
The power quality range includes the Sag (instantaneous voltage drop), the Swell (voltage surge), the voltage THD (Total Harmonic Distortion), the flicker (flicker), and the voltage synchronization of the EESS with the emergency generator And voltage synchronizing. ≪ RTI ID = 0.0 > [0002] < / RTI >
Emergency generator that supplies EESS power to the load when the power supplied from the grid is supplied to the load, generates emergency power by operating the emergency generator, cuts off the power of the EESS by performing power switching operation, and supplies the emergency power to the load. A method for evaluating the quality of an EESS linked operating system,
Supplying power to the load when the power supplied from the system is interrupted;
Controlling the EESS measuring unit to measure power information from the power source of the EESS;
Operating the emergency generator to produce an emergency power source;
The control unit controlling the generator measuring unit to measure power information from an emergency power source of the emergency generator;
Receiving power information from the EESS measurement unit and the generator measurement unit and determining a power quality range of the data;
When the power quality range satisfies the reference range, performing power supply switching operation to supply power to the load to the emergency generator;
And if the power quality range does not satisfy the reference range, the controller controls the alarm unit to inform the user of the quality of the electric power quality range.
5. The method of claim 4,
Controlling the load measuring unit to measure power information from a power source supplied to the load;
The control unit receiving power information from the load measuring unit and determining a power quality range of the data;
Shutting off the power supply of the EESS supplied to the load when the power quality range satisfies the reference range;
Further comprising: if the power quality range does not satisfy the reference range, controlling the alarm unit to inform the user of the alarm unit.

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