KR20140036429A - Dynamic voltage dip/sag controller capable of controling on/off of bypass scr - Google Patents

Dynamic voltage dip/sag controller capable of controling on/off of bypass scr

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Publication number
KR20140036429A
KR20140036429A KR1020120102059A KR20120102059A KR20140036429A KR 20140036429 A KR20140036429 A KR 20140036429A KR 1020120102059 A KR1020120102059 A KR 1020120102059A KR 20120102059 A KR20120102059 A KR 20120102059A KR 20140036429 A KR20140036429 A KR 20140036429A
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KR
South Korea
Prior art keywords
switch
bypass thyristor
bypass
thyristor
inverter
Prior art date
Application number
KR1020120102059A
Other languages
Korean (ko)
Inventor
박태준
김태원
Original Assignee
재단법인 포항산업과학연구원
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 재단법인 포항산업과학연구원 filed Critical 재단법인 포항산업과학연구원
Priority to KR1020120102059A priority Critical patent/KR20140036429A/en
Publication of KR20140036429A publication Critical patent/KR20140036429A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
    • H01L27/0203—Particular design considerations for integrated circuits
    • H01L27/0248—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection
    • H01L27/0251—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection for MOS devices
    • H01L27/0259—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection for MOS devices using bipolar transistors as protective elements
    • H01L27/0262—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection for MOS devices using bipolar transistors as protective elements including a PNP transistor and a NPN transistor, wherein each of said transistors has its base coupled to the collector of the other transistor, e.g. silicon controlled rectifier [SCR] devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G9/00—Installations of electric cables or lines in or on the ground or water
    • H02G9/06—Installations of electric cables or lines in or on the ground or water in underground tubes or conduits; Tubes or conduits therefor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Stand-By Power Supply Arrangements (AREA)
  • Inverter Devices (AREA)

Abstract

The present invention relates to an instantaneous power failure compensator capable of on / off control of a bypass thyristor. The instantaneous power failure compensator of the present invention is provided by a current flowing from a bypass thyristor or a bypass thyristor that bypasses current. A low frequency transformer for voltage step-down, an inverter for switching output of a voltage-dropped current in the low frequency transformer, and a supercapacitor charged with charge by the current output from the inverter, the inverter being connected in series with each other A first switch-second switch, and a third switch-fourth switch, each of which is connected to a low-frequency transformer, and whose ends are connected in parallel to each other and connected to both ends of the supercapacitor, respectively. The second switch and the third switch to turn off the operation of the bypass thyristor in the flowing state. By turning on the switch of the switch, a forward bias is applied to the bypass thyristor, the current flowing in the reverse direction across the bypass thyristor is turned down and turned off, thereby operating the semiconductor switching element used in the inverter. Controlling the switching operation of the circuit eliminates the need for a separate bypass thyristor cancellation.

Description

Dynamic Voltage Dip / Sag Controller capable of control on / off of bypass SCR}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an instantaneous power interruption compensation device, and more particularly, to compensate for an instantaneous power failure of a system or an instantaneous low voltage such as Dip or Sag, and to use a bypass operation when the system is normal. Controlled Rectifier: The instantaneous power failure compensation device that can turn off the silicon controlled rectifier, thyristor) without a separate erase circuit.

The instantaneous power outage compensator is a voltage compensator for compensating voltage dip (Voltage Dip / Sag) of the control power supply such as instantaneous power outage or dip or sag of the system.

Here, Sag refers to a voltage drop phenomenon that occurs instantaneously when the power equipment is in operation, and mainly means a short time within 8 [msec] to several seconds. An instantaneous voltage dip state does not mean an instantaneous interruption of the voltage.

Sag is the instantaneous voltage drop due to ground faults and short circuits in power supply lines caused by weather such as lightning, rain, wind, snow and other causes of wildlife such as animals and plants. It is artificial, such as a drop in input voltage due to momentary overload of adjacent machinery.

This voltage drop not only affects the operation of ultra-fine processing equipment such as production equipment and semiconductor production equipment, which requires precision, but also causes significant damage such as deterioration of quality and delay in delivery due to reduced production. The instantaneous power failure compensation device is a voltage compensation device that can minimize the damage to customers due to sag by preventing the reduction of production and the deterioration of quality by safely protecting the operation of the production equipment from the influence of Sag.

The instantaneous power failure compensation device compensates for the AC input abnormality by operating an inverter in a short time within 2ms (Typical 1.2ms) when an instantaneous power failure or sag of AC input occurs. It should be prevented from affecting.

1 is a view showing an example of a conventional instantaneous power failure compensation device for voltage compensation according to the instantaneous voltage drop phenomenon.

As shown, the conventional instantaneous power outage compensator includes a bypass thyristor (Bypass SCR) 10, a low frequency transformer 20, an inverter 30, and a supercapacitor 40. Consists of

Since the voltage loss of the supercapacitor 40 is generally low, the momentary power compensation device having such a configuration is stepped down by the low frequency transformer 20 to charge the supercapacitor 40 through the inverter 30.

The instantaneous power failure compensator shuts down the bypass thyristor 10 when a system abnormality (instantaneous power failure, low voltage) occurs during normal operation, and operates the energy stored in the supercapacitor 40 through the inverter 30 in the inverter mode. It works on the principle of discharging.

Here, the bypass thyristor 10 has a disadvantage in that the conduction of the device is easy due to the inherent characteristics of the device, but the erase of the device is not easy.

That is, the bypass thyristor 10 has a principle that the device is turned off when a voltage is applied in the reverse direction. Therefore, conventional net power compensation compensation requires a separate commutation circuit.

As described above, since the conventional instantaneous power compensation compensation politics does not turn off once the bypass thyristor 10 is turned on, it is separately required to take a method of forcibly turning off the external circuit. Requires a current circuit.

An object of the present invention for solving the above problems, there is no separate erase circuit to switch to the off mode from the operation state of the bypass thyristor (Bypass SCR) when a system abnormality (instantaneous power interruption, low voltage) occurs during normal operation It is to provide a momentary power compensation compensation that can turn off the device arbitrarily.

Instantaneous power failure compensation tunable to the on / off control of the bypass thyristors according to an embodiment of the present invention for achieving the above object,

A bypass thyristor (Bypass SCR (Silicon Controlled Rectifier)) for bypassing current;

A low frequency transformer for lowering voltage by current flowing from the bypass thyristor;

An inverter for switching and outputting a voltage-dropped current in a low frequency transformer; And

It is configured to include; and a supercapacitor (Super Capacitor) is charged by the current output from the inverter

The inverter is connected to each other in series, the connection portion is connected to the low-frequency transformer, the end is connected to each other in parallel, the first switch-second switch and the third switch connected to both ends of the supercapacitor, respectively It is comprised with the 4th switch.

In the present exemplary embodiment, the first switch-second switch and the third switch-fourth switch are semiconductor switching elements, and each includes a metal oxide semiconductor-field effect transistor (MOS-FET).

In the present embodiment, the instantaneous power interruption compensation device is configured to turn off the operation of the bypass thyristor in a state in which a forward current flows through the bypass thyristor.

By turning on the switches of the first switch and the fourth switch to supply voltage to the bypass thyristor, a reverse bias is applied to the bypass thyristor so that a current flowing in the forward direction across the bypass thyristor Down and turn off.

The instantaneous power failure compensating device in the present embodiment, in order to turn off the operation of the bypass thyristor in a state in which a reverse current flows through the bypass thyristor,

By turning on the switches of the second switch and the third switch, a forward bias is applied to the bypass thyristors so that the current flowing in the reverse direction across the bypass thyristors is turned down and turned off. .

According to the present invention, the instantaneous power failure compensation device can completely turn off the switching operation of the bypass thyristor (Bypass SCR) by the operation of the semiconductor switching element used in the inverter, thereby eliminating the bypass bypass thyristor (Bypass SCR). The advantage is that no circuit is required.

In addition, according to the present invention, by configuring the instantaneous power failure compensation device having an inverter consisting of a semiconductor switching element instead of a circuit for the separate bypass thyristors (Bypass SCR), the manufacturing cost of the product can be lowered and the circuit components are reduced The high-capacity inverter switch replaces the bypass thyristor (Bypass SCR) to increase the reliability of the product.

1 is a view showing an example of a conventional instantaneous power failure compensation device for voltage compensation according to the instantaneous voltage drop phenomenon.
2 is a circuit diagram illustrating an instantaneous power failure compensator capable of controlling on / off of a bypass thyristor according to an exemplary embodiment of the present invention.
3 is a diagram illustrating an example of a switching operation of the inverter 300 for turning off the operation of the bypass thyristor (Bypass SCR) in a state in which a forward current flows in a normal operation according to the first embodiment of the present invention.
4 is an example of switching operation of the inverter for turning off the operation of the bypass thyristor (Bypass SCR) in a situation in which a reverse current flows due to a system abnormality (instantaneous power failure or low voltage) during normal operation according to a second embodiment of the present invention. Figure is a diagram.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is to be noted that the same elements among the drawings are denoted by the same reference numerals whenever possible. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

The present invention is to bypass the operation when the system is normal in the momentary power compensation device for compensating voltage dip (Voltage Dip / Sag) of the control power supply such as instantaneous power failure or Dip or Sag of the system The present invention proposes a method for turning off the bypass thyristor (Bypass SCR) used in a voltage drop without a separate erase device circuit.

That is, the present invention proposes a method of arbitrarily turning off the element of the bypass thyristor (Bypass SCR) without a separate erase circuit.

2 is a circuit diagram illustrating an instantaneous power failure compensator capable of controlling on / off of a bypass thyristor according to an exemplary embodiment of the present invention.

As illustrated, the instantaneous power failure compensator capable of on / off control of the bypass thyristor includes a bypass thyristor (Bypass SCR) 100, a low frequency transformer 200, an inverter 300, And a supercapacitor 400.

The inverter 300 includes a semiconductor switching device including a first switch 310, a second switch 320, a third switch 330, and a fourth switch 340. The first switch 310, the second switch 320, the third switch 330, and the fourth switch 340 are each composed of a metal oxide semiconductor-field effect transistor (MOS-FET). The first switch 310 and the third switch 330, and the second switch 320 and the fourth switch 340 are connected in series with each other, respectively, the first switch 310-the third switch 330 The second switch 320 and the fourth switch 340 are connected in parallel to each other. The connection line of the first switch 310 and the third switch 330 is connected to the current input terminal of the low frequency transformer 200, and the connection line of the second switch 320 and the fourth switch 340 is the low frequency transformer 200. Connected to the current output stage

In addition, both ends of the first switch 310, the third switch 330, the second switch 320, and the fourth switch 340 connected in parallel are connected to both ends of the supercapacitor 400, respectively.

Since the voltage loss of the supercapacitor 400 is generally low, the momentary power compensation device having such a configuration is stepped down by the low frequency transformer 200 to charge the supercapacitor 400 through the inverter 300.

3 is a diagram illustrating an example of a switching operation of the inverter 300 to turn off the operation of the bypass thyristor (Bypass SCR) 100 in a state in which a forward current flows in a normal operation according to the first embodiment of the present invention. to be.

In order to turn off the operation of the bypass thyristor (Bypass SCR) 100 while the forward current flows as the operation of the momentary power compensation device is in a normal state, the first switch 310 of the inverter 300 and The switch of the fourth switch 340 is turned on to supply voltage.

Accordingly, the reverse bias is applied to the bypass thyristor (Bypass SCR) 100 while the forward current is flowing, so that the current flowing in the forward direction across the bypass thyristor (Bypass SCR) 100 drops to zero. And turn off.

4 is a diagram illustrating an inverter for turning off the operation of the bypass thyristor (Bypass SCR) 100 in a situation in which a reverse current flows due to a system abnormality (instantaneous power failure or low voltage) during normal operation according to a second embodiment of the present invention. 300 is a diagram illustrating an example of a switching operation.

When the operation of the momentary power compensation device is in a normal state, a system abnormality (instantaneous power failure, low voltage) occurs, and the reverse bypass current discharged from the supercapacitor 400 flows to the bypass thyristor (Bypass SCR) 100.

At this time, when the bypass thyristor (Bypass SCR) 100 is to be turned off by the operation of the bypass thyristor (Bypass SCR) 100 at the time when the reverse bypass current flows, the second switch 320 of the inverter 300. ) And the switch of the third switch 330 is turned on.

Accordingly, a forward bias is applied to the bypass thyristor (Bypass SCR) 100 while the reverse current is flowing, so that the current flowing in the reverse direction across the bypass thyristor (Bypass SCR) 100 falls to zero. And turn off.

As such, the instantaneous power failure compensator may completely turn off the switching operation of the bypass thyristor (Bypass SCR) 100 by the operations of the semiconductor switching elements 310, 320, 330, and 340 used in the inverter 300, thereby providing a separate bypass thyristor. There is no need for a circuit for erasing the (bypass SCR) 100.

In addition, by configuring the instantaneous power failure compensation device having an inverter 300 composed of semiconductor switching elements instead of a circuit for eliminating a separate bypass thyristor (Bypass SCR) 100, the manufacturing cost of the product can be lowered and the circuit components This reduced, high-capacity inverter switch replaces the bypass thyristors (Bypass SCR) to increase product reliability.

In the foregoing, certain preferred embodiments of the present invention have been shown and described. However, the present invention is not limited to the above-described embodiments, and any person having ordinary skill in the art to which the present invention pertains may make various modifications and equivalents without departing from the gist of the present invention attached to the claims. Other implementations may be possible. Accordingly, the true scope of the present invention should be determined only by the appended claims.

Claims (4)

In the momentary power compensation device,
A bypass thyristor (Bypass SCR (Silicon Controlled Rectifier)) for bypassing current;
A low frequency transformer for lowering voltage by current flowing from the bypass thyristor;
An inverter for switching and outputting a voltage-dropped current in a low frequency transformer; And
It is configured to include; and a supercapacitor (Super Capacitor) is charged by the current output from the inverter
The inverter is connected to each other in series, the connection portion is connected to the low-frequency transformer, the end is connected to each other in parallel, the first switch-second switch and the third switch connected to both ends of the supercapacitor, respectively -A momentary power outage compensator capable of controlling on / off of the bypass thyristor, characterized by comprising a fourth switch.
The method of claim 1,
The first switch-second switch and the third switch-fourth switch are semiconductor switching elements, and each of the bypass thyristor is configured by a metal oxide semiconductor-field effect transistor (MOS-FET). Power failure compensation device with on / off control.
The method of claim 1,
In order to turn off the operation of the bypass thyristor in a state in which a forward current is flowing in the bypass thyristor,
Supplying a voltage to the bypass thyristor by turning on the switches of the first switch and the fourth switch,
Reverse bias is applied to the bypass thyristor, the current flowing in the forward both ends of the bypass thyristor is a momentary power compensation device capable of on / off control of the bypass thyristor characterized in that the turn off (turn off) .
The method of claim 1,
To turn off the operation of the bypass thyristor in a state in which a reverse current is flowing in the bypass thyristor,
By turning on the switch of the second switch and the third switch,
A forward bias is applied to the bypass thyristor, the current flowing in opposite directions across the bypass thyristor is turned down (turn off), characterized in that the momentary power compensation device capable of on / off control of the bypass thyristor .
KR1020120102059A 2012-09-14 2012-09-14 Dynamic voltage dip/sag controller capable of controling on/off of bypass scr KR20140036429A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2562221A (en) * 2017-05-08 2018-11-14 Eaton Power Quality Oy Method for forcing the commutating of a bypass scr of a ups system and ups system
CN109103891A (en) * 2018-10-30 2018-12-28 广州供电局有限公司 Voltage dip governing system and voltage dip compensating control method, device
CN109193559A (en) * 2018-10-30 2019-01-11 广州供电局有限公司 Power supply fast switching system, method for handover control and device
CN111562494A (en) * 2020-06-05 2020-08-21 全球能源互联网研究院有限公司 Test circuit and method for testing on-off characteristics of converter valve
CN116667518A (en) * 2023-07-24 2023-08-29 山东华天电气有限公司 Direct-current voltage sag management circuit and control method thereof

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2562221A (en) * 2017-05-08 2018-11-14 Eaton Power Quality Oy Method for forcing the commutating of a bypass scr of a ups system and ups system
CN109103891A (en) * 2018-10-30 2018-12-28 广州供电局有限公司 Voltage dip governing system and voltage dip compensating control method, device
CN109193559A (en) * 2018-10-30 2019-01-11 广州供电局有限公司 Power supply fast switching system, method for handover control and device
CN111562494A (en) * 2020-06-05 2020-08-21 全球能源互联网研究院有限公司 Test circuit and method for testing on-off characteristics of converter valve
CN111562494B (en) * 2020-06-05 2022-04-05 全球能源互联网研究院有限公司 Test circuit and method for testing on-off characteristics of converter valve
CN116667518A (en) * 2023-07-24 2023-08-29 山东华天电气有限公司 Direct-current voltage sag management circuit and control method thereof
CN116667518B (en) * 2023-07-24 2023-10-27 山东华天电气有限公司 Direct-current voltage sag management circuit and control method thereof

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