Power transmission system submodule bypass switch operation detection device

Abstract

The present invention is a power transmission system submodule bypass switch operation detection device. By using indicator lamps (18) to display operational states of bypass switches (28) on submodules (10, 10'), the operational states of the bypass switches (28) may be accurately displayed, and light emitted from the indicator lamps (18) or light radiators (30) may be displayed by being transferred to a specific location by using reflective plates (33). According to such configuration, a worker may more easily check the states of the submodules (10, 10').

Description

Submodule bypass switch operation detection device of a power transmission system

[0001] The present invention relates to a bypass switch operation detection device of a sub-module used in a power transmission system.

[0002] A High Voltage Direct Current (HVDC) transmission system converts AC power generated at power plants into DC for transmission, then reconverts it to AC at receiving points for power supply. Compared to AC transmission systems, HVDC systems exhibit lower losses, offer greater transmission efficiency, improve stability through grid separation, and suffer less inductive interference, making them advantageous for long-distance power transmission.

[0003] In this type of ultra-high-voltage direct current transmission system, multiple submodules are installed in a frame that can reach several meters in height and is composed of multiple layers. For example, a single frame may have at least two layers, and multiple submodules are installed in rows on each layer.

[0004] There's also the Flexible Alternative Current Transmission (FACT) system, which utilizes power semiconductors in transmission systems. FACT systems utilize control technology utilizing power semiconductor switching elements in AC transmission lines to increase system flexibility, thereby addressing the shortcomings of AC systems and improving their characteristics. FACT systems utilize submodules similar to those used in ultra-high-voltage DC transmission systems.

[0005] As described above, the submodules used in the transmission system are installed across multiple floors, and multiple submodules are installed in rows on each floor.

[0006] Due to this structure, it is extremely difficult and time-consuming for operators to check the operating status of each submodule. Specifically, if a submodule fails, the control board sends a bypass switch operation signal, which cuts off power to the submodule. Consequently, the submodule is bypassed and unusable, making it difficult for operators to accurately determine its status without direct inspection.

[0007] In addition, the structure for detecting whether the existing bypass switch is operating is mechanical, and the status display position of the indicator is often not accurate, so the worker often has to re-examine it directly using a multimeter. The indicator is mechanically connected to the bypass switch and displays the status in conjunction with the on / off status of the bypass switch, and this is cumbersome because the worker has to go to the relevant submodule and check the indicator directly.

[0008] In addition, in order to take measures such as repairing a broken submodule, a worker must search for the submodule. However, in cases where a large number of submodules are lined up on each floor, it is necessary to be able to check the location of the broken submodule in advance without having to search for each submodule one by one to see if it is broken.

[0009] Prior art technologies that have the above problems include Korean Patent No. 10-2387824, Korean Patent Publication No. 10-2019-0080621, and Korean Patent Publication No. 10-2022-0049859.

[0010] The present invention is intended to solve various problems according to the above-mentioned conventional technology, and the purpose of the present invention is to enable accurate confirmation of whether a bypass switch used in a sub-module is operating.

[0011] The purpose of the present invention is to enable indication of whether a bypass switch is operating even in a faulty submodule.

[0012] The purpose of the present invention is to enable remote confirmation of the operation of a bypass switch used in a submodule.

[0013] The purpose of the present invention is to enable the operation of a bypass switch used in a sub-module to be checked remotely by group.

[0014] According to a feature of the present invention for achieving the above-described object of the present invention, the present invention may include a power transmission system in which a plurality of sub-modules are provided in a plurality of layers formed in a frame, a battery for storing power provided from outside the sub-module, a battery switch capable of controlling the supply of power to the battery in conjunction with the operation of a bypass switch of the sub-module, and a light source turned on by the power of the battery.

[0015] A cooling water pipe is provided to release heat generated in the above sub-module, and a generator for generating electricity stored in the battery is installed in the cooling water pipe, and can be operated by the flow of cooling water flowing in the cooling water pipe.

[0016] Power provided external to the above sub-module may be provided by wind or solar power.

[0017] The above light source may be an LED indicator light.

[0018] The above light source may be a light irradiator capable of irradiating light to a predetermined distance.

[0019] The direction of the light irradiated from the above light irradiator can be controlled to set the position where the light is irradiated.

[0020] The irradiation position of the light emitted from the above light irradiator can be controlled by a reflector.

[0021] The above reflector is installed on the front of the sub-module, and the reflective surface of the reflector can be inclined at a predetermined angle toward the light irradiator.

[0022] Light whose direction is controlled by the above reflector can be irradiated to a display area on the frame or the ground on which the frame is installed.

[0023] The sub-module bypass switch operation detection device of the transmission system according to the present invention may have at least one or more of the following effects.

[0024] In the present invention, the on / off status of a bypass switch is indicated using light. Therefore, an operator can accurately check the on / off status of the bypass switch without errors due to mechanical operation.

[0025] In addition, the present invention is particularly designed to display the operating status of a sub-module bypass switch used in a power transmission system even when the sub-module is malfunctioning and power is not supplied. That is, power is generated by utilizing the flow of cooling water used to cool the heat generated in a group of multiple sub-modules, and is supplied to the sub-modules, so that the operating status of the sub-module bypass switch can be displayed at all times. Therefore, the status of the sub-module can be accurately displayed at all times.

[0026] In the present invention, the operating signal of the bypass switch in the submodule is irradiated with light from a light generator, allowing the operator to view the signal remotely. Therefore, the operator can check the status of the submodule without actually having to travel to the location of the submodule.

[0027] In the present invention, light emitted from a light generator providing an operating signal for a bypass switch is reflected by a reflector to a specific location, allowing the light to be viewed from a remote location. In particular, by adjusting the installation state of the reflector, the bypass switch operating signals of multiple submodule groups can be confirmed in a single location. For example, the operating signals of the bypass switches provided from multiple submodules on a specific floor can be gathered and confirmed in a single location using a reflector.

[0028] FIG. 1 is a perspective view showing a part of a power transmission system to which a preferred embodiment of a sub-module bypass switch operation detection device according to the present invention is applied.

[0029] Figure 2 is a front view showing the front of a sub-module to which the configuration of an embodiment of the present invention is applied.

[0030] Figure 3 is a configuration diagram showing the configuration of a bypass switch operation detection device of an embodiment of the present invention.

[0031] Figure 4 is a circuit diagram showing the circuit configuration of an embodiment of the present invention.

[0032] Figure 5 is a perspective view showing a part of a transmission system to which another embodiment of the present invention is applied.

[0033] Figure 6 is a schematic diagram showing the configuration of the embodiment illustrated in Figure 5.

[0034] Fig. 7 is a side view showing the relationship between reflectors on different layers in the embodiment illustrated in Fig. 5.

[0035] Figure 8 is an explanatory diagram showing the operation of the embodiment illustrated in Figure 5.

[0036] Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. When designating components in each drawing, it should be noted that, where possible, identical components will be given the same reference numerals, even if they appear in different drawings. Furthermore, when describing embodiments of the present invention, if a detailed description of a related known structure or function is deemed to hinder understanding of the embodiments of the present invention, such detailed description will be omitted.

[0037] Additionally, terms such as first, second, A, B, (a), (b), etc. may be used to describe components of embodiments of the present invention. These terms are only intended to distinguish the components from other components, and the nature, order, or sequence of the components are not limited by the terms. When it is described that a component is "connected," "coupled," or "connected" to another component, it should be understood that the component may be directly connected or connected to the other component, but another component may also be "connected," "coupled," or "connected" between each component.

[0038] Referring to the drawings, the configuration of the sub-module bypass switch operation detection device of the transmission system of the embodiment of the present invention is described.

[0039] The embodiments illustrated in FIGS. 1 to 4 will be described, and the configuration of a frame (1) on which a sub-module (10) is installed will be described. For example, in an ultra-high voltage direct current transmission system, as illustrated in FIG. 1, a plurality of sub-modules (10) are installed in a frame (1) having a height of several meters and consisting of a plurality of layers.

[0040] The above frame (1) can be made of, for example, columns (3) and partition plates (5). That is, a plurality of columns (3) are installed vertically, and the partition plates (5) are supported on the columns (3) to form each layer. The sub-modules (10) are installed in rows on the partition plates (5).

[0041] The above sub-module (10) is composed of a power supply unit (12) and a capacitor unit (14), and various power semiconductors and various control boards are installed in the power supply unit (12). A connection electrode (17) may be provided on the front surface (16) of the sub-module (10). The connection electrode (17) is used for electrical connection between adjacent sub-modules (10). An indicator light (18) may be provided on one side of the front surface (16). The indicator light (18) may be located on a surface other than the front surface (16) of the sub-module (10). The indicator light (18) indicates the operating status of the bypass switch (28) to be described below. For example, the indicator light (18) may indicate the operating status of the bypass switch (28) by turning it on or off. Alternatively, the on / off status of the bypass switch (28) may be indicated by changing the color of the indicator light (18). An LED may be used as the indicator light (18).

[0042] A portion of the control board (19) may be exposed on one side of the front (16) of the sub-module (10). The control board (19) can check the operating status of the sub-module (10) and provide an operating signal to the bypass switch (28).

[0043] The above frame (1) has a cooling water pipe (20). The cooling water pipe (20) can serve to supply and recover cooling water to and from the sub-modules (10). For this purpose, the cooling water pipes (20) can be provided on each layer of the frame (1). They can all be connected. The cooling water delivered from a cooling water tank (not shown) can be provided to each sub-module (10) to exchange heat, receive heat, and then pass through a heat exchanger for radiating heat to the outside, and then flow back into the cooling water tank.

[0044] Branch pipes (22) branch from the above cooling water pipe (20). The branch pipes (22) are configured to supply and recover cooling water to and from the sub-modules (10), respectively. That is, there are two branch pipes (22) in one sub-module (10), so that cooling water circulates and exits through the cooling water pipes inside the sub-module (10).

[0045] Meanwhile, the cooling water pipe (20) has a generator (24) for generating electricity. The generator (24) rotates by the cooling water flowing inside the cooling water pipe (20). Power is generated by the rotation of the generator (24). The electricity generated by the generator (24) is stored in a battery (26). The electricity stored in the battery (26) can be used to drive the indicator light (18). The electricity stored in the battery (26) can also be used to operate the control board (19).

[0046] The electricity stored in the above battery (26) can be transferred to the indicator light (18) by turning on the battery switch (28'). That is, the electricity of the battery (26) can be transferred to the indicator light (18) by turning on the battery switch (28') according to the operation of the bypass switch (28). That is, by providing a fault signal from the control board (19), the bypass switch (28) and the battery switch (28') can be turned on, causing the indicator light (18) to turn on.

[0047] When the indicator light (18) is turned on in this way, it is exposed to the front (16) of the sub-module (10) and can be seen by the operator from the outside. Accordingly, the operator can confirm that the bypass switch (28) of the sub-module (10) is turned on.

[0048] FIG. 4 illustrates a circuit diagram of an embodiment of the present invention. As can be seen here, the power generated from the generator turbine (24) is stored in the battery (26), and the power provided from the battery (26) can turn the indicator lamp (18) on and off by turning the battery switch (28') on and off. The on and off of the indicator lamp (18) is linked to the on and off operation of the bypass switch (28). In FIG. 4, unexplained reference numeral 25 is a diode that ensures that only the voltage in a constant direction transmitted from the generator turbine (24) is supplied to the battery (26). Unexplained reference numeral 25' in the drawing is a Zener diode that regulates the upper limit of the voltage supplied from the generator turbine (24). Instead of the battery (26), various types of energy storage devices such as capacitors may be used.

[0049] Next, FIGS. 5 and 6 illustrate another embodiment of the present invention. This embodiment will be described primarily with respect to a configuration different from that of the embodiment described above.

[0050] In the sub-module (10') of the present embodiment, a light irradiator (30) can be used instead of the indicator light (18). The light irradiator (30) can irradiate light (B). That is, the light irradiator (30) is used to irradiate light (B) to a more distant location. The light irradiator (30) irradiating light (B) means that the bypass switch (28) is turned on. That is, a fault signal of the sub-module (10') from the control board (19) is provided to the bypass switch (28) and the battery switch (28'), so that the bypass switch (28) and the battery switch (28') are turned on, and power of the battery (26) is supplied to the light irradiator (30).

[0051] When the power of the battery (26) is supplied, the light irradiator (30) can irradiate light (B). In order to control the direction in which the light (B) of the light irradiator (30) is transmitted, there is a reflector (33). The reflector (33) may be located on one side of the front surface (16) of the sub-module (10'). The reflector (33) can control the direction in which the light (B) is irradiated depending on the state in which it is installed in the sub-module (10'). For example, the path of the light (B) that is reflected and transmitted can be controlled by controlling the angle formed between the reflector (33) and the front surface (16).

[0052] In this embodiment, one reflector (33) is installed in one sub-module (10'). However, more than one reflector (33) may be installed in one sub-module (10') to set the direction in which light (B) is irradiated differently.

[0053] In the illustrated embodiment, the reflector (33) is installed at an angle toward the ground on the front surface (16) of the sub-module (10') so that the reflector (33) can transmit light (B) toward the ground. That is, it is connected to the front surface (16) from above with respect to the light irradiator (30) by a hinge (33'), and the reflective surface of the reflector (33) faces the light irradiator (30) on the front surface (16). At this time, the angle between the reflective surface and the front surface (16) is made to be a predetermined acute angle.

[0054] Meanwhile, the light (B) irradiated from the light irradiator (30) and reflected by the reflector (33) is irradiated to the ground in this embodiment. That is, the light is irradiated to the display area (35) on the ground. In the display area (35), a mark can be placed at the position where the light (B) from each sub-module (10') reaches, so as to recognize the corresponding sub-module (10'). Therefore, the operator can check which sub-module (10') the light (B) was irradiated to by checking the display area (35) on the ground in front of the corresponding frame (1).

[0055] In Fig. 7, it is illustrated that the reflectors (33) of the sub-modules (10') on each floor of the frame (1) are at different angles so that they are transmitted without interference to the display area (35) on the ground. For example, the installation angles of the reflectors (33) of the sub-modules (10') on the first floor, the installation angles of the sub-modules (10') on the second floor, and the installation angles of the sub-modules (10') on the third floor are all different, and it can be seen that the angles gradually increase from the first floor to the third floor.

[0056] However, if multiple reflectors (33) are appropriately arranged in one sub-module (10'), the direction in which light (B) is transmitted may be other than the ground direction. For example, light (B) may be irradiated to a display area (35) formed in a partition plate (5) or column (3) corresponding to a specific layer of the frame (1).

[0057] Hereinafter, the operation of the sub-module bypass switch operation detection device of the power transmission system according to the present invention having the configuration described above will be described in detail.

[0058] In the sub-module (10, 10'), power is not supplied when the bypass switch (28) is turned on to bypass the sub-module (10, 10'). However, in the present invention, the power generator (24) in the cooling water pipe (20) operates according to the flow of cooling water and generates power, and the power is stored in the battery (26).

[0059] For reference, the cooling water of the cooling water pipe (20) is used to discharge heat generated in the sub-module (10, 10') to the outside. Therefore, the cooling water always flows in the cooling water pipe (20) under pressure by a pump (not shown). Then, it enters and exits each sub-module (10, 10') through a branch pipe (22). A separate cooling water flow path is created inside the sub-module (10, 10'), so that the cooling water receives heat while flowing without leaking within the sub-module (10, 10') and then exits again through the cooling water pipe (20).

[0060] Therefore, the cooling water is always flowing within the cooling water pipe (20), and the generator (24) within the cooling water pipe (20) can generate electricity by rotating due to the flow of the cooling water.

[0061] The power stored in the battery (26) can be supplied to the indicator light (18) or the light irradiator (30) through the battery switch (28') depending on the on-operation of the bypass switch (28). In this way, when the indicator light (18) or the light irradiator (30) operates, the operator can easily check which sub-module (10, 10') is bypassed.

[0062] That is, if the indicator light (18) is on, the worker can accurately check the corresponding sub-module (10) to determine whether there is a malfunction. In addition, if the light (B) irradiated from the light irradiator (30) is irradiated to the display area (35), the worker can easily check which sub-module (10') on which floor is bypassed from the location of the display area (35), i.e., from a remote location.

[0063] This state is illustrated in Fig. 8. Referring to Fig. 8, it shows a state in which two sub-modules (10') are bypassed. That is, light (B) is irradiated from the second sub-module (10') from the right on the first floor and the first sub-module (10') from the left on the third floor, and is irradiated to the corresponding location of the display area. In this way, the worker can easily identify the bypassed sub-module (10') by simply checking the display area (35) from the ground.

[0064] And, as explained above, depending on the configuration of the reflector (33) of the sub-module (10'), the display area (35) can be positioned in various locations. For example, a separate display area (35) can be positioned for each layer of the frame (1). Accordingly, it can be made possible for the operator to check the bypassed sub-module (10') at a desired location.

[0065] Although all components constituting the embodiments of the present invention have been described above as being combined or operating in combination, the present invention is not necessarily limited to these embodiments. That is, within the scope of the purpose of the present invention, all components may be selectively combined and operated one or more times. In addition, terms such as "include," "comprise," or "have" described above, unless specifically stated to the contrary, mean that the corresponding component may be inherent, and therefore should be interpreted as including other components rather than excluding other components. All terms, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the art to which the present invention pertains, unless otherwise defined. Commonly used terms, such as terms defined in a dictionary, should be interpreted as being consistent with the contextual meaning of the related technology, and shall not be interpreted in an ideal or excessively formal sense, unless explicitly defined in the present invention.

[0066] The above description is merely an illustrative illustration of the technical idea of ​​the present invention, and those skilled in the art will appreciate that various modifications and variations can be made without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate, rather than limit, the technical idea of ​​the present invention, and the scope of the technical idea of ​​the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of the rights of the present invention.

[0067] In the illustrated embodiment, electricity generated by a generator (24) in a cooling water pipe (20) is stored in the battery (26), but for example, electricity obtained from wind or solar power can also be stored in the battery (26) and used.

Claims

1. In a transmission system in which multiple sub-modules are provided in multiple layers formed in a frame, A battery that stores power provided from outside the above submodule, A battery switch that can control the power supply of the battery by linking with the operation of the bypass switch of the above sub-module, A sub-module bypass switch operation detection device of a power transmission system including a light source powered by the above battery.

2. In the first paragraph, a sub-module bypass switch operation detection device of a power transmission system, wherein a cooling water pipe for dissipating heat generated in the sub-module is provided, and a generator for generating electricity stored in the battery is installed in the cooling water pipe, and the sub-module bypass switch operation detection device is operated by the flow of cooling water flowing in the cooling water pipe.

3. In the first paragraph, the power provided from outside the sub-module is a sub-module bypass switch operation detection device of a power transmission system provided by wind power or solar power.

4. A sub-module bypass switch operation detection device of a power transmission system, wherein the light source is an indicator light made of an LED according to any one of claims 1 to 3.

5. A sub-module bypass switch operation detection device of a power transmission system, wherein the light source is a light irradiator capable of irradiating light to a predetermined distance, in any one of paragraphs 1 to 3.

6. A sub-module bypass switch operation detection device of a power transmission system that sets a position where light is irradiated by controlling the direction of light irradiated from the light irradiator in the fifth paragraph.

7. In paragraph 6, a sub-module bypass switch operation detection device of a power transmission system that controls the irradiation position of light from the light irradiator with a reflector.

8. In the 7th paragraph, the reflector is installed on the front of the sub-module, and the reflective surface of the reflector is inclined at a predetermined angle toward the light irradiator. A sub-module bypass switch operation detection device of a power transmission system.

9. In the 8th paragraph, the light whose direction is controlled from the reflector is irradiated to the display area on the frame or the ground on which the frame is installed. A sub-module bypass switch operation detection device of a power transmission system.

Images