KR20160118685A - Valve controller and valve module for hvdc system - Google Patents

Abstract

A valve controller according to the embodiment of the present invention includes a communication part which communicates with each of a plurality of value modules, and a control part which generates a test signal for testing a connection state between each of the valve modules and the valve controller, controls the transmission of the generated test signal to each of the valve modules, receives response signals corresponding to the transmitted test signal from each of the value modules, and determines the connection state of the valve controller and each of the valve modules based on the received response signals. So, a communication connection state between the valve modules and the valve controller can be efficiently tested.

Description

[0001] Valve controller and valve module for HVDC system [0002]

The present invention relates to a power conversion apparatus and control method thereof for an HVDC system, and more particularly, to a power conversion apparatus and a control method therefor of an HVDC system capable of checking a communication connection state between a plurality of valve modules of a HVDC system and a valve controller .

HIGH VOLTAGE DIRECT CURRENT (HVDC) refers to a transmission system in which a transmission station transforms AC power generated by a power plant into DC power and supplies power by re-converting it from AC to AC.

The HVDC system is applied to submarine cable transmission, large-capacity long-distance transmission, and linkage between AC systems.

This HVDC system can be used for different frequency grid connection and asynchronism connection, and is used for long-distance power transmission and the like.

Transducers included in the HVDC system convert AC power to DC power. In other words, it is very dangerous to transmit AC power using a submarine cable. Therefore, the power station converts the AC power into DC power and transmits it to the power plant.

On the other hand, the HVDC system includes a plurality of valve modules to convert AC power to DC power.

Such a valve module is composed of a power semiconductor, and a power semiconductor includes a thyristor or an insulated gate bipolar transistor (IGBT).

 Since multiple valve modules are used to convert AC power to DC power in a HVDC system, efficient control of multiple valve modules is of utmost importance in power conversion operations.

On the other hand, a plurality of valve modules operate through the control of the valve controller of the HVDC system, and the valve controller and the valve module are generally connected to the optical cable, which is a communication cable for communication.

Therefore, it is necessary to check whether the optical cable connected between the valve controller and the plurality of valve modules is properly connected during the initial operation of the HVDC system.

In this optical cable connection inspection process, the operator must individually check the port number of the optical output port, the optical cable number, and the valve module number, which are communication ports of the valve controller.

Accordingly, there is a problem that it is not easy for the operator to find the faulty connection state because of the limit of the inspection method of inspecting through the visual inspection of the optical fiber cable connection inspection, and it is a very difficult work for the operator.

In addition, hundreds to thousands of valve modules of the HVDC system are included in the HVDC system depending on the configuration of the HVDC system, so it is a very large task for the operator to individually check the connection status of a large number of valve modules. Therefore, there is also a problem that it takes a lot of time to conduct a connection inspection process for an optical fiber cable inspection.

Accordingly, there is a need for a method that can efficiently and conveniently check the connection state for communication between a plurality of valve modules and a valve controller in an HVDC system.

An object of the present invention is to provide a power conversion apparatus and control method for an HVDC system that can effectively check the communication connection state between a plurality of valve modules included in a power conversion apparatus of an HVDC system and a valve controller.

A valve controller according to an embodiment of the present invention includes: a communication unit for communicating with each of a plurality of valve modules; And a controller for generating a test signal for testing a connection state between each of the plurality of valve modules and the valve controller and transmitting the generated test signal to each of the plurality of valve modules, And a controller for receiving a response signal from each of the plurality of valve modules and determining a connection state between each of the plurality of valve modules and the valve controller based on each of the plurality of received response signals.

The communication unit may include a plurality of communication ports to which a communication cable for communicating with each of the plurality of valve modules is connected. The control unit may include a port number of each of a plurality of communication ports connected to each of the plurality of valve modules, And a control signal for causing each of the plurality of valve modules to perform a test operation.

The control unit may determine whether the unique number of each of the plurality of valve modules among the valve module information included in each of the received plurality of response signals corresponds to the port number of each of the plurality of communication ports, It is possible to determine that each of the plurality of valve modules and the valve controller are normally connected if each unique number corresponds to the port number of each of the plurality of communication ports.

The controller may determine whether a result of the test operation of each of the plurality of valve modules included in each of the plurality of received response signals corresponds to a control signal for a test operation included in the test signal, If the result of the test operation of each of the valve modules corresponds to the control signal for the test operation included in the test signal, it can be determined that each of the plurality of valve modules and the valve controller are normally connected.

The controller may further include a display unit for displaying information on a connection state of each of the plurality of valve modules determined and the valve controller.

A valve module according to an embodiment of the present invention includes a switching unit for performing a switching operation corresponding to a control signal; And a controller for receiving a test signal from the valve controller to test a connection state between the valve controller and the valve module, generating a response signal corresponding to the received test signal, and transmitting the generated response signal to the valve controller And a valve control unit.

In addition, the valve control unit may control the switching unit to perform an operation corresponding to a control signal included in the test signal to perform a test operation.

The valve control unit may generate a response signal including at least one of the unique numbers of the valve modules as a result of the test operation.

The valve module may include at least one of a thyristor and an insulated gate bipolar transistor (IGBT).

According to various embodiments of the present invention, it is possible to easily check the communication connection state of the valve controller and the valve modules included in the power conversion apparatus of the HVDC system.

In addition, the present invention can check the communication connection state between a plurality of valve modules and the valve controller at a time, thereby shortening the time required for the communication connection state inspection and the connection state inspection process.

1 is a diagram for explaining a configuration of a high voltage direct current transmission (HVDC transmission) system according to an embodiment of the present invention.
2 is a diagram for explaining a configuration of a mono polar high voltage DC transmission system according to an embodiment of the present invention.
3 is a diagram for explaining a configuration of a high-voltage DC transmission system of a bipolar system according to an embodiment of the present invention.
4 is a view for explaining connection of a transformer and a three-phase valve bridge according to an embodiment of the present invention.
5 is a configuration block diagram of a power conversion apparatus according to an embodiment of the present invention.
6 is a block diagram of a valve module according to an embodiment of the present invention.
7 is a first exemplary view showing a communication cable connection of each configuration of a power conversion apparatus according to an embodiment of the present invention.
8 is a second exemplary view showing a communication cable connection of each configuration of the power conversion apparatus according to an embodiment of the present invention.
9 is a ladder diagram for explaining an operation method of the power conversion apparatus according to an embodiment of the present invention.
10 is an exemplary diagram illustrating a determined connection status indication according to an embodiment of the present invention.

Hereinafter, embodiments related to the present invention will be described in detail with reference to the drawings. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

In the following description of the present invention, a 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. The following terms are defined in consideration of the functions in the embodiments of the present invention, which may vary depending on the intention of the user, the intention or the custom of the operator. Therefore, the definition should be based on the contents throughout this specification.

Combinations of the steps of each block and flowchart in the accompanying drawings may be performed by computer program instructions. These computer program instructions may be embedded in a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus so that the instructions, which may be executed by a processor of a computer or other programmable data processing apparatus, Thereby creating means for performing the functions described in the step. These computer program instructions may also be stored in a computer usable or computer readable memory capable of directing a computer or other programmable data processing apparatus to implement the functionality in a particular manner so that the computer usable or computer readable memory It is also possible to produce manufacturing items that contain instruction means that perform the functions described in each block or flowchart illustration in each step of the drawings. Computer program instructions may also be stored on a computer or other programmable data processing equipment so that a series of operating steps may be performed on a computer or other programmable data processing equipment to create a computer- It is also possible for the instructions to perform the processing equipment to provide steps for executing the functions described in each block and flowchart of the drawings.

Also, each block or each step may represent a module, segment, or portion of code that includes one or more executable instructions for executing the specified logical function (s). It should also be noted that in some alternative embodiments, the functions mentioned in the blocks or steps may occur out of order. For example, two blocks or steps shown in succession may in fact be performed substantially concurrently, or the blocks or steps may sometimes be performed in reverse order according to the corresponding function.

FIG. 1 shows a high voltage direct current transmission (HVDC transmission) system according to an embodiment of the present invention.

1, the HVDC system 100 according to the embodiment of the present invention includes a power generation part 101, a power transmission side AC part 110, a power transmission side part 103, a DC transmission part 140, A demand side transformation part 105, a demand side AC part 170, a demand part 180, and a control part 190. The transmission-side transformer part 103 includes a transmission-side transformer part 120 and a transmission-side AC-DC converter part 130. The demand side transformation part 105 includes the demand side DC-AC converter part 150 and the demand side transformer part 160.

The power generation part 101 generates three-phase AC power. The power generation part 101 may include a plurality of power plants.

The transmission side AC part 110 transfers the three-phase AC power generated by the power generation part 101 to the DC substation including the transmission side transformer part 120 and the transmission side AC-DC converter part 130.

The transmission side transformer part 120 isolates the transmission side AC part 110 from the transmission side AC-DC converter part 130 and the DC transmission part 140.

The transmission AC-DC converter part 130 converts the three-phase AC power corresponding to the output of the transmission side transformer part 120 into DC power.

The DC transmission part 140 transmits the DC power of the transmission side to the demand side.

The demand side DC-AC converter part 150 converts the DC power delivered by the DC transmission part 140 into three-phase AC power.

The demand side transformer part (160) isolates the demand side AC part (170) from the demand side DC - AC converter part (150) and the DC transmission part (140).

The demand side AC part 170 provides the demand part 180 with the three-phase AC power corresponding to the output of the demand side transformer part 160.

The control part 190 includes a power generation part 101, a power transmission side AC part 110, a power transmission side power part 103, a DC transmission part 140, a demand side transformation part 105, a demand side AC part 170, The demand part 180, the control part 190, the transmission side AC-DC converter part 130, and the demand side DC-AC converter part 150. [ Particularly, the control part 190 can control the timing of the turn-on and turn-off of the plurality of valves in the transmission side AC-DC converter part 130 and the demand side DC-AC converter part 150. At this time, the valve may correspond to a thyristor or an insulated gate bipolar transistor (IGBT).

In addition, the control part 190 may include a valve controller 250 that controls the above-described plurality of valves.

2 shows a mono polar high voltage DC transmission system according to an embodiment of the present invention.

In particular, Figure 2 shows a system for transmitting a single pole DC power. In the following description, it is assumed that a single pole is a positive pole, but the present invention is not limited thereto.

The power transmission side AC part 110 includes an AC transmission line 111 and an AC filter 113.

The AC transmission line 111 transfers the three-phase AC power generated by the power generation part 101 to the power transmission side transformation part 103.

The AC filter 113 removes the remaining frequency components other than the frequency component used by the transmission part 103 from the transmitted three-phase AC power.

The transmission side transformer part 120 includes one or more transformers 121 for the positive polarity. The transmission AC-DC converter part 130 for the positive pole includes an AC-to-bipolar DC converter 131 for generating bipolar DC power, which is connected to one or more transformers 121 And corresponding one or more three-phase valve bridges 131a.

When one three-phase valve bridge 131a is used, the ac-to-bipolar DC converter 131 can generate bipolar DC power having six pulses using alternating current power. At this time, the primary coil and the secondary coil of the one transformer 121 may have a Y-Y-shaped connection and may have a Y-delta (?) -Shaped connection.

When two three-phase valve bridges 131a are used, the ac-to-bipolar DC converter 131 can generate bipolar DC power having twelve pulses using alternating current power. At this time, the primary coil and the secondary coil of one of the two transformers 121 may have a YY-shaped connection, and the primary coil and the secondary coil of the other transformer 121 may have a Y- It may have a connection.

When three three-phase valve bridges 131a are used, the ac-to-bipolar DC converter 131 can generate bipolar DC power having 18 pulses using alternating current power. The greater the number of positive pole DC power pulses, the lower the price of the filter.

The DC transmission part 140 includes a transmission side anode direct current filter 141, a cathode direct current transmission line 143, and a demand side anode direct current filter 145.

The transmission-side anode direct current filter 141 includes an inductor L 1 and a capacitor C 1 and DC-filters the anode direct current power output from the AC-anode DC converter 131.

The bipolar DC transmission line 143 has one DC line for transmission of the bipolar DC power, and the bipolar DC transmission line 143 can be used as a return path of current. One or more switches may be placed on this DC line.

The demand side anode direct current filter 145 includes an inductor L2 and a capacitor C2 and DC filters the anode direct current power transmitted through the anode direct current transmission line 143. [

The demand side dc-ac converter part 150 includes a bipolar dc-ac converter 151 and the bipolar dc-ac converter 151 includes one or more three-phase valve bridges 151a.

The demand side transformer part 160 includes one or more transformers 161 each corresponding to one or more three-phase valve bridges 151a for the anode.

When one three-phase valve bridge 151a is used, the bipolar DC-to-AC converter 151 can generate AC power having six pulses using bipolar DC power. At this time, the primary coil and the secondary coil of the transformer 161 may have a Y-Y connection or a Y-delta connection.

When two three-phase valve bridges 151a are used, the bipolar DC-to-AC converter 151 can generate AC power having 12 pulses using bipolar DC power. At this time, the primary coil and the secondary coil of one of the two transformers 161 may have a YY-shaped connection, and the primary coil and the secondary coil of the other transformer 161 may have a Y- It may have a connection.

When three three-phase valve bridges 151a are used, the bipolar DC-to-AC converter 151 can generate AC power having 18 pulses using bipolar DC power. The greater the number of pulses of AC power, the lower the price of the filter.

The demand side AC part 170 includes an AC filter 171 and an AC transmission line 173.

The AC filter 171 removes the remaining frequency components other than the frequency component (for example, 60 Hz) used by the demand part 180 from the AC power generated by the demand side transmission part 105.

The AC transmission line 173 delivers the filtered AC power to the demand part 180.

3 shows a bipolar high voltage DC transmission system according to an embodiment of the present invention.

In particular, Figure 3 shows a system for transmitting two pole DC power. In the following description, it is assumed that the two poles are a positive pole and a negative pole, but the present invention is not limited thereto.

The power transmission side AC part 110 includes an AC transmission line 111 and an AC filter 113.

The AC transmission line 111 transfers the three-phase AC power generated by the power generation part 101 to the power transmission side transformation part 103.

The AC filter 113 removes the remaining frequency components other than the frequency component used by the transmission part 103 from the transmitted three-phase AC power.

The transmission side transformer part 120 includes at least one transformer 121 for the anode and at least one transformer 122 for the cathode. The transmission AC-DC converter part 130 includes an AC-positive DC converter 131 for generating positive DC power and an AC-negative DC converter 132 for generating negative DC power. An AC-to-DC converter 131 includes one or more three-phase valve bridges 131a each corresponding to one or more transformers 121 for an anode and the ac-to-cathode DC converter 132 corresponds to one or more transformers 122 for a cathode, respectively One or more three-phase valve bridges 132a.

When one three-phase valve bridge 131a is used for the anode, the ac-to-bipolar DC converter 131 can generate bipolar DC power having six pulses using alternating current power. At this time, the primary coil and the secondary coil of the one transformer 121 may have a Y-Y-shaped connection and may have a Y-delta (?) -Shaped connection.

When two three-phase valve bridges 131a are used for the positive pole, the ac-to-bipolar DC converter 131 can generate bipolar DC power with twelve pulses using alternating current power. At this time, the primary coil and the secondary coil of one of the two transformers 121 may have a YY-shaped connection, and the primary coil and the secondary coil of the other transformer 121 may have a Y- It may have a connection.

When three three-phase valve bridges 131a are used for the anode, the ac-to-bipolar DC converter 131 can generate bipolar DC power having 18 pulses using alternating current power. The greater the number of positive pole DC power pulses, the lower the price of the filter.

If one three-phase valve bridge 132a is used for the cathode, the ac-to-cathode DC converter 132 can produce negative DC power with six pulses. At this time, the primary coil and the secondary coil of the one transformer 122 may have a Y-Y-shaped connection and may have a Y-delta (?) -Shaped connection.

When two three-phase valve bridges 132a are used for the cathode, the AC-to-negative DC converter 132 is capable of generating negative DC power having twelve pulses. At this time, the primary coil and the secondary coil of one of the two transformers 122 may have a YY-shaped connection, and the primary coil and the secondary coil of the other transformer 122 may have a Y- It may have a connection.

When three three-phase valve bridges 132a are used for the cathode, the AC-to-negative DC converter 132 can generate negative DC power with eighteen pulses. The greater the number of negative DC power pulses, the lower the price of the filter.

The DC transmission part 140 includes a transmission side anode direct current filter 141, a transmission side cathode direct current filter 142, a cathode direct current transmission line 143, a cathode direct current transmission line 144, a demand side anode direct current filter 145, And a demand side cathode direct current filter 146.

The transmission-side anode direct current filter 141 includes an inductor L 1 and a capacitor C 1 and DC-filters the anode direct current power output from the AC-anode DC converter 131.

The power supply side cathode direct current filter 142 includes an inductor L3 and a capacitor C3 and DC-filters the cathode direct current power output from the AC-negative DC converter 132. [

The bipolar DC transmission line 143 has one DC line for transmission of the bipolar DC power, and the bipolar DC transmission line 143 can be used as a return path of current. One or more switches may be placed on this DC line.

The cathode DC transmission line 144 has one DC line for transmission of the cathode DC power, and the earth can be used as the return path of the electric current. One or more switches may be placed on this DC line.

The demand side anode direct current filter 145 includes an inductor L2 and a capacitor C2 and DC filters the anode direct current power transmitted through the anode direct current transmission line 143. [

The demand side cathode direct current filter 146 includes an inductor L 4 and a capacitor C 4 and DC-filters the cathode direct current power transmitted through the cathode direct current transmission line 144.

AC converter 151 includes a positive DC-to-AC converter 151 and a negative DC-to-AC converter 152 and the bipolar DC-to-AC converter 151 includes one or more three-phase valve bridge 151a, , And cathode DC-to-AC converter 152 includes one or more three-phase valve bridges 152a.

The demand side transformer part 160 includes one or more transformers 161 each corresponding to one or more three-phase valve bridges 151a for the anode and one or more transformers 161 corresponding to one or more three-phase valve bridges 152a And one or more transformers 162.

When one three-phase valve bridge 151a is used for the anode, the anode DC-to-AC converter 151 can generate AC power having six pulses using the anode DC power. At this time, the primary coil and the secondary coil of the transformer 161 may have a Y-Y connection or a Y-delta connection.

When two three-phase valve bridges 151a are used for the anode, the anode DC-to-AC converter 151 can generate AC power having 12 pulses using the anode DC power. At this time, the primary coil and the secondary coil of one of the two transformers 161 may have a YY-shaped connection, and the primary coil and the secondary coil of the other transformer 161 may have a Y- It may have a connection.

When three three-phase valve bridges 151a are used for the positive pole, the positive pole dc-to-AC converter 151 can generate ac power having eighteen pulses using positive pole dc power. The greater the number of pulses of AC power, the lower the price of the filter.

When one three-phase valve bridge 152a is used for the cathode, the cathode DC-to-AC converter 152 can generate AC power having six pulses using cathode DC power. At this time, the primary coil and the secondary coil of the one transformer 162 may have a Y-Y connection or a Y-delta connection.

When two three-phase valve bridges 152a are used for the cathode, the cathode DC-to-AC converter 152 can generate AC power having 12 pulses using cathode DC power. At this time, the primary coil and the secondary coil of one of the two transformers 162 may have a YY-shaped connection, and the primary coil and the secondary coil of the other transformer 162 may have Y- It may have a connection.

When three three-phase valve bridges 152a are used for the cathode, the cathode DC-to-AC converter 152 can generate AC power with eighteen pulses using cathode DC power. The greater the number of pulses of AC power, the lower the price of the filter.

The demand side AC part 170 includes an AC filter 171 and an AC transmission line 173.

The AC filter 171 removes the remaining frequency components other than the frequency component (for example, 60 Hz) used by the demand part 180 from the AC power generated by the demand side transmission part 105.

The AC transmission line 173 delivers the filtered AC power to the demand part 180.

4 shows a connection of a transformer and a three-phase valve bridge according to an embodiment of the present invention.

Particularly, Fig. 4 shows the connection of two transformers 121 for the anode and two three-phase valve bridges 131a for the anode. The connection of two transformers 122 for a negative electrode and two three-phase valve bridges 132a for a negative electrode, connection of two transformers 161 for an anode and two three-phase valve bridges 151a for an anode, Two transformers 162 for the negative pole and two three-phase valve bridges 152a for the negative pole, one transformer 121 for the positive pole and one three-phase valve bridge 131a for the positive pole, And the connection of one transformer 161 for one pole and one three-phase valve bridge 151a for the positive pole can be easily derived from the embodiment of Fig. 4, and therefore the illustration and description thereof are omitted.

4, a transformer 121 having a YY-shaped wiring is referred to as an upper transformer, a transformer 121 having a Y-shaped wiring is referred to as a lower transformer, a three-phase valve bridge 131a connected to an upper transformer is referred to as an upper three- The three-phase valve bridge 131a connected to the valve bridge and the lower transformer is referred to as a lower three-phase valve bridge.

The upper three-phase valve bridge and the lower three-phase valve bridge have a first output OUT1 and a second output OUT2, which are two output terminals for outputting DC power.

The upper three-phase valve bridge includes six valves D1-D6, and the lower three-phase valve bridge includes six valves D7-D12.

The valve D1 has a cathode connected to the first output OUT1 and an anode connected to the first terminal of the secondary coil of the upper transformer.

The valve D2 has a cathode connected to the anode of the valve D5 and an anode connected to the anode of the valve D6.

The valve D3 has a cathode connected to the first output OUT1 and an anode connected to the second terminal of the secondary coil of the upper transformer.

The valve D4 has a cathode connected to the anode of the valve D1 and an anode connected to the anode of the valve D6.

The valve D5 has a cathode connected to the first output OUT1 and an anode connected to the third terminal of the secondary coil of the upper transformer.

The valve D6 has a cathode connected to the anode of the valve D3.

The valve D7 has a cathode connected to the anode of the valve D6 and an anode connected to the first terminal of the secondary coil of the lower transformer.

The valve D8 has a cathode connected to the anode of the valve D11 and an anode connected to the second output OUT2.

The valve D9 has a cathode connected to the anode of the valve D6 and an anode connected to the second terminal of the secondary coil of the lower transformer.

The valve D10 has a cathode connected to the anode of the valve D7 and an anode connected to the second output OUT2.

The valve D11 has a cathode connected to the anode of the valve D6 and an anode connected to the third terminal of the secondary coil of the lower transformer.

The valve D12 has a cathode connected to the anode of the valve D9 and an anode connected to the second output OUT2.

On the other hand, at least one of the transmission side AC-DC converter part 130 and the demand side DC-AC converter part 150 may include the power conversion device 200.

 The power conversion apparatus 200 can convert DC power into AC power using a plurality of valve modules 210. [

In addition, the power conversion apparatus 200 can convert AC power into DC power using a plurality of valve modules 210.

The configuration of the power inverter 200 will be described with reference to FIG.

5 is a block diagram of the configuration of the power conversion apparatus 200. As shown in FIG.

The power conversion apparatus 200 includes a valve module 210, a relay 230, and a valve controller 250.

The valve module 210 receives the AC power and converts it into DC power.

Also, the valve module 210 may receive DC power and convert it into AC power.

The valve module 210 may include a valve sensor unit 211, a valve control unit 213, and a switching unit 217.

The valve sensor unit 211 may measure at least one of the current and the voltage of the valve module 210.

The valve control unit 213 can control the overall operation of the valve module 210.

The valve control unit 213 receives a control signal from at least one of the valve controller 250 and the repeater 230 and can control the operation of the valve module 210 based on the received control signal.

Specifically, the valve control unit 213 can control the current and voltage measurement operation of the valve sensor unit 211, the switching operation of the switching unit 217, and the like.

The valve control unit 213 may transmit at least one of the current and the voltage of the valve module 210 measured by the valve sensor unit 211 to one or more of the repeater 230 and the valve controller 250.

Also, the valve control unit 213 may perform a test operation based on the test signal transmitted from the valve controller 250. For example, the valve control section 213 can control the switching operation of the switching section 217 in a test operation corresponding to the transmitted test signal.

The valve control unit 213 may generate a response signal including valve module information for the valve module based on the test signal transmitted from the valve controller 250. [

Where the valve module information may refer to information about the valve module 210. For example, the valve module information may include the unique number of the valve module 210 and may include result information for a test operation according to a test signal.

The valve control unit 213 may transmit a response signal including the generated valve module information to the valve controller 250. [

The switching unit 217 can switch the current input / output to / from the valve module 210.

The switching unit 217 may include at least one switch, and may perform a switching operation in accordance with a control signal of the valve control unit 213.

Meanwhile, the switching unit 217 may include a power semiconductor.

Here, the power semiconductor means a semiconductor device for a power device, and can be optimized for power conversion and control. The power semiconductor is also referred to as a valve device.

Accordingly, the switch included in the switching unit 217 may include a power semiconductor, and may be formed of an insulated gate bipolar transistor (IGBT), a gate turn-off thyristor (GTO), or an integrated gate commutated thyristor (IGCT) .

Referring to FIG. 6, the configuration of the valve module 210 will be described in detail.

Fig. 6 is an exemplary view of the configuration of the valve module 210. Fig.

6, the valve module 210 may include a valve sensor unit 211, a valve control unit 213, a switching unit 217, a reactor unit 218, and a capacitor unit 219.

The valve sensor unit 211 may measure at least one of the current and the voltage of the valve module 210.

Also, the valve sensor unit 211 can sense the physical condition of the valve module 210 as well.

For example, the valve sensor unit 211 can sense at least one of the physical cracks and temperature of the valve module 210.

The valve control unit 213 can control the overall operation of the valve module 210.

The valve control unit 213 receives a control signal from at least one of the valve controller 250 and the repeater 230 and can control the overall operation of the valve module 210 based on the received control signal.

In addition, the valve control unit 213 may transmit the valve state signal to at least one of the valve controller 250 and the repeater 230.

Here, the valve state signal may be a signal including at least one of the current measured by the valve sensor unit 211, the voltage, the sensed physical crack, and the temperature.

The switching unit 217 can convert AC power into DC power based on the control signal of the valve control unit 213. [

Further, the switching unit 217 can convert the DC power into the AC power based on the control signal of the valve control unit 213. [

The switch included in the switching unit 217 may include a power semiconductor.

The reactor unit 218 may filter the increase of the reactance in accordance with the amount of current change occurring during the turn-on and turn-off operations of the switching unit 217.

The capacitor unit 219 can filter the overvoltage generated during the turn-on and turn-off operations of the switching unit 217.

See FIG. 5 again.

The repeater 230 can receive the control signal transmitted by the valve controller 250 and transmit it to the valve module 210.

For example, the repeater 230 may receive a control signal for the control operation of the valve module 210 from the valve controller 250 connected to the repeater 230.

And the repeater 230 may transmit the received control signal to the plurality of valve modules 210 connected to the repeater 230.

The repeater 230 may include a relay sensor unit 231, a relay control unit 233, and a relay communication unit 235.

The relay sensor unit 231 can sense the physical state of the repeater 230.

For example, the relay sensor unit 231 can sense one or more of the physical cracks and temperatures of the repeater 230.

The relay control unit 233 can control the overall operation of the relay 230. [

For example, the relay control unit 233 can control the operation of transmitting the control signal received by the relay 230 to the valve module 210. [

The relay control unit 233 may transmit a control signal to each of the plurality of valve modules 210 connected to the repeater 230.

For example, the relay control unit 233 can transmit control signals corresponding to each of the plurality of valve modules 210 based on the control signal received from the valve controller 250.

The relay communication unit 235 can exchange data with the valve module 210, the other relay 230, and the valve controller 250.

For example, the relay communication unit 235 can transmit and receive data to and from the communication unit 255 included in the valve controller 250.

The relay communication unit 235 may transmit and receive data between the relay 230 including the relay communication unit 235 and another relay 230. [

The relay communication unit 235 can transmit and receive data to and from the valve control unit 213 included in the valve module 210.

The valve controller 250 is capable of controlling the overall operation of the power inverter 200.

The valve controller 250 may be VBE (Valve Base Electronics).

The valve controller 250 may include a sensor unit 251, a control unit 253, and a communication unit 255.

The sensor unit 251 may measure at least one of the current and voltage of the AC parts 110 and 170 and the DC transmission part 140 associated with the valve controller 250.

The control unit 253 can control the overall operation of the power conversion apparatus 200.

Specifically, the controller 253 receives the entire command value from the control part 190, which is an upper controller, and controls the overall operation of the power inverter 200 based on the received total command value.

Here, the total command value may mean a control signal for the control part 190 to control the power conversion device 200. [

The control unit 253 can generate a control signal based on the total command value received from the control part 190. [

For example, the control unit 253 controls the power converter 200 (200) based on at least one of the reference effective power, the reference reactive power, the reference current, and the reference voltage, which are command values received from the control part 190 through the communication unit 255 May be controlled.

Further, the control unit 253 can directly calculate the entire control value.

Here, the total control value may be a target value for the voltage, current, and frequency magnitude of the output AC power of the power inverter 200.

For example, the control unit 253 calculates the total control value based on at least one of the current, the voltage of the AC parts 110 and 170 and the current and voltage of the DC transmission part 140 associated with the power conversion apparatus 200 Can be calculated.

The controller 253 may generate a test signal for testing the communication state of the valve module 210 communicatively coupled to the valve controller 250.

The test signal may include a control signal to cause the valve module 210 communicatively coupled to the valve controller 250 to perform a test operation.

The test signal may include a port number of a communication port (not shown) included in the communication unit 255. [

The control unit 253 receives the response signal corresponding to the transmitted test signal and can determine the connection state between the valve controller 250 and the valve module 210 based on the received response signal.

In addition, the controller 253 can display the determined connection status on the display device 300. [

Accordingly, the display device 300 can display information on the connection state of each of the plurality of valve modules 210 communicably connected to the valve controller 250.

Here, the display device 300 can display various information. The display device 300 may also be included in the valve controller 250. Accordingly, the display device 300 may be included in the valve controller 250 in the form of a display module.

The communication unit 255 can exchange data with at least one of the relay communication unit 235 included in the repeater 230, the valve control unit 213 of the valve module 210, and the control unit 190.

The communication unit 255 may include one or more communication ports (not shown), and the communication port may be connected to the valve module 210 or the repeater 230 via a communication cable. For example, one communication port (not shown) may be connected to one valve module 210. Thus, the communication unit 255 may include a plurality of communication ports, and each of the plurality of communication ports may be connected to a communication cable connected to each of the plurality of valve modules 210.

The communication unit 255 can transmit data to at least one of the relay communication unit 235, the valve control unit 213, and the control unit 190 based on the signal received from the control unit 253.

The communication unit 255 may transmit the data received from one or more of the relay communication unit 235, the valve control unit 213, and the control unit 190 to the control unit 253.

The communication cable connection of each configuration of the power inverter 200 will be described with reference to Figs. 7 to 8. Fig.

Figs. 7 to 8 are conceptual diagrams showing connection of communication cables of each configuration of the power inverter 200. Fig.

Referring to FIG. 7, the valve controller 250 may be directly connected to each of the plurality of valve modules 210.

Specifically, each of a plurality of communication ports (not shown) included in the valve controller 250 may be connected to each of the plurality of valve modules 210 through a communication cable.

Accordingly, the valve controller 250 can directly transmit the control signal for each of the plurality of valve modules 210 to each of the plurality of valve modules 210. [

In addition, the valve controller 250 can directly receive the valve state signals transmitted by each of the plurality of valve modules 210.

Meanwhile, the valve controller 250 and the valve module 210 may be connected by one or more communication cables or by a plurality of communication cables.

For example, the valve controller 250 and the valve module 210 may be connected by a control communication cable carrying a control signal and a status communication cable carrying a valve status signal.

In addition, the valve controller 250 may be coupled to each of the plurality of valve modules 210 via one or more relays 230.

Referring to FIG. 8, the valve controller 250 may be connected to a plurality of relays 230.

Specifically, each of the plurality of communication ports (not shown) included in the valve controller 250 may be connected to each of the plurality of repeaters 230 through a communication cable.

Each of the plurality of repeaters 230 may be connected to each of the plurality of valve modules 210.

Accordingly, the valve controller 250 can directly transmit a control signal for each of the plurality of valve modules 210 to each of the plurality of relays 230.

In addition, the valve controller 250 can directly receive the valve state signals transmitted by each of the plurality of repeaters 230.

Each of the plurality of repeaters 230 may be connected to each of the plurality of valve modules 210.

Accordingly, each of the plurality of repeaters 230 can directly transmit the received control signal to each of the plurality of valve modules 210.

Each of the plurality of valve modules 210 may receive a control signal from the repeater 230.

Meanwhile, the valve controller 250, the repeater 230, the repeater 230, and the valve module 210 may be connected by one or more communication cables.

Also, the repeater 230 may be directly connected to the other repeater 230.

9, an operation method of the power conversion apparatus 200 according to the present invention will be described.

9 is a ladder diagram for explaining a method of operating the power conversion apparatus 200 according to an embodiment of the present invention.

Referring to FIG. 9, the controller 253 of the valve controller 250 checks the connection state of the communication unit 255 (S110).

The control unit 253 can confirm whether the communication unit 255 is connected to the valve module 210 or the relay 230. [

Specifically, the control unit 253 can confirm whether the communication unit 255 is connected to the at least one valve module 210.

The control unit 253 can confirm that one or more communication ports (not shown) are connected to the communication unit 255 through the communication cable to the valve module 210 or the repeater 230. Where one communication port can be connected to one valve module 210 via one or more communication cables.

The controller 253 of the valve controller 250 generates a test signal for checking the connection state between the valve controller 250 and the valve module 210 at step S130.

The control unit 253 may generate a test signal including a control signal for causing the valve module 210 to perform a test operation. Also, the control unit 253 may generate port information for the port number of the communication port by including the port information in the test signal.

Here, the port number may be a unique number of each of a plurality of communication ports to which a communication cable for communicating with each of the plurality of valve modules 210 is connected.

The control unit 253 may generate test signals for each of the plurality of communication ports.

The control unit 253 of the valve controller 250 transmits the generated test signal to the valve module 210 through the communication unit 255 (S150).

The control unit 253 can transmit the generated test signals to each of the one or more valve modules 210 through the communication unit 255. [

The control unit 253 may transmit the generated test signal to each of the one or more valve modules 210 via the repeater 230. [

The valve control unit 213 of the valve module 210 receives the transmitted test signal and performs a test operation based on the transmitted test signal (S170).

For example, the valve control section 213 can control the switching operation of the switching section 217 in a test operation corresponding to the transmitted test signal.

Accordingly, the switching unit 217 can perform a switching operation corresponding to the test signal.

The valve control unit 213 of the valve module 210 generates a response signal based on the performed test operation result and the valve module information (S190).

For example, the valve control section 213 can generate a response signal based on the operation result of the switching operation of the switching section 217 and the valve module information.

Where the valve module information may refer to information about the valve module 210.

For example, the valve module information may include a unique number indicative of unique information of the valve module 210.

The valve control unit 213 of the valve module 210 transmits the generated response signal to the valve controller 250 (S210).

The valve control unit 213 can transmit the generated response signal to the communication unit 255 of the valve controller 250. [

The valve control unit 213 may transmit the generated response signal to the communication unit 255 of the valve controller 250 through the relay 230. [

The control unit 253 of the valve controller 250 determines the connection state between the valve controller 250 and the valve module 210 based on the transmitted response signal (S230).

The control unit 253 can receive the response signal transmitted through the communication unit 255. [

The control unit 253 can determine the connection state between the valve controller 250 and the valve module 210 based on the transmitted response signal and receives a response signal from each of the plurality of valve modules 210, The controller 210 may determine the connection state between the valve controller 250 and the valve controller 250.

For example, the control unit 253 can determine the connection state between the valve controller 250 and the valve module 210 based on the test operation result included in the received response signal and the valve module information.

In one embodiment, the control unit 253 can determine whether the unique number of the valve module included in the received response signal corresponds to the port number of the communication port to which the test signal is transmitted.

Accordingly, if the port number of the communication port corresponds to the unique number of the valve module, the control unit 253 can determine that the valve module 210 having transmitted the response signal and the valve controller 250 are normally connected.

In another embodiment, the control unit 253 can determine whether the test operation result included in the received response signal corresponds to the transmitted test signal.

Accordingly, when the test operation result included in the received response signal corresponds to the transmitted test signal, the controller 253 can determine that the valve module 210 that transmitted the response signal and the valve controller 250 are normally connected .

In another embodiment, the control unit 253 determines whether the unique number of the valve module included in the received response signal corresponds to the port number of the communication port to which the test signal is transmitted. If the result of the test operation included in the received response signal is It is possible to judge whether or not it corresponds to the transmitted test signal.

Accordingly, the control unit 253 determines that the unique number of the valve module included in the received response signal corresponds to the port number of the communication port to which the test signal is transmitted, and transmits the test signal included in the received response signal to the test signal It can be determined that the valve module 210 having transmitted the response signal and the valve controller 250 are normally connected.

On the other hand, for each response signal received from each of the plurality of valve modules 210 connected to each of the plurality of communication ports, the control unit 253 sets the connection states of the plurality of valve modules 210 and the valve controller 250, respectively It can be judged.

The description of the above-described connection state determination is not intended to limit the present invention. Accordingly, it is possible to determine the connection state between the valve controller 250 and the valve module 210 through various methods according to the selection of the user or the designer.

The controller 253 of the valve controller 250 displays information on the determined connection state on the display device 300 (S250).

The control unit 253 may display information on the determined connection state between the valve module 210 and the valve controller 250 on the display device 300. [

Will be described with reference to FIG.

10 is an exemplary diagram illustrating a determined connection status indication according to an embodiment of the present invention.

Referring to FIG. 10, the valve controller 250 may display information on the determined connection state through the display device 300.

The information on the determined connection state may include at least one of whether or not the valve module 210 is connected to the communication port of the corresponding valve controller 250 and whether or not the test operation corresponding to the transmitted test signal of the valve module 210 is performed . ≪ / RTI >

For example, the controller 253 of the valve controller 250 may control the display device 300 to display information on the determined connection state.

On the other hand, the display device 300 may be included in the valve controller 250. For example, the display device 300 may be included in the valve controller 250 in the form of a display module.

The control unit 253 may display information on the determined connection states of the plurality of valve modules 210 on the display device 300, respectively.

Accordingly, the controller 253 can display information on the determined connection state for each of the plurality of valve modules 210 on one screen of the display device 300.

According to an embodiment of the present invention, the above-described method can be implemented as a code readable by a processor on a medium on which a program is recorded. Examples of the medium that can be read by the processor include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, etc., and may be implemented in the form of a carrier wave (e.g., transmission over the Internet) .

The embodiments described above are not limited to the configurations and methods described above, but the embodiments may be configured by selectively combining all or a part of the embodiments so that various modifications can be made.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the present invention.

Claims (9)

A valve controller for controlling a plurality of valve modules,
A communication unit for communicating with each of the plurality of valve modules; And
A controller for generating a test signal for testing a connection state between each of the plurality of valve modules and the valve controller and controlling the transfer of the generated test signal to each of the plurality of valve modules, And a controller for receiving a signal from each of the plurality of valve modules and determining a connection state between each of the plurality of valve modules and the valve controller based on each of the plurality of received response signals
Valve controller. The method according to claim 1,
The communication unit
And a plurality of communication ports to which a communication cable for communicating with each of the plurality of valve modules is connected,
The control unit
Generating a test signal including at least one of a port number of each of a plurality of communication ports connected to each of the plurality of valve modules, and a control signal for causing each of the plurality of valve modules to perform a test operation
Valve controller. 3. The method of claim 2,
The control unit
Determining whether the unique number of each of the plurality of valve modules among the valve module information included in each of the received plurality of response signals corresponds to the port number of each of the plurality of communication ports,
When the unique number of each of the plurality of valve modules corresponds to the port number of each of the plurality of communication ports, it is determined that each of the plurality of valve modules and the valve controller are normally connected
Valve controller. 3. The method of claim 2,
The control unit
Determining whether a result of the test operation of each of the plurality of valve modules included in each of the received plurality of response signals corresponds to a control signal for a test operation included in the test signal,
If the result of the test operation of each of the plurality of valve modules corresponds to the control signal for the test operation included in the test signal, it is determined that each of the plurality of valve modules and the valve controller are normally connected
Valve controller. The method according to claim 1,
Further comprising a display unit for displaying information on a connection state of each of the plurality of valve modules and the valve controller,
Valve controller. 1. A valve module operated on the basis of a control signal transmitted from a valve controller,
A switching unit for performing a switching operation corresponding to the control signal; And
A valve for receiving a test signal for testing the connection between the valve controller and the valve module from the valve controller, generating a response signal corresponding to the received test signal, and transmitting the response signal to the valve controller Comprising a control section
Valve module. The method according to claim 6,
The valve control unit
And controls the switching unit to perform an operation corresponding to a control signal included in the test signal to perform a test operation
Valve module. 8. The method of claim 7,
The valve control unit
As a result of the test operation, generating a response signal comprising at least one of the unique numbers of the valve modules
Valve module. The method according to claim 6,
The valve module
A thyristor, and an insulated gate bipolar transistor (IGBT).
Valve module.

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