KR102590447B1 - Solar generating appratus adapted for active control against reverse power and consistency gegerating efficiency via controlling each of ac circuit by distributed power convertor optimized for bipv - Google Patents

Abstract

According to an embodiment of the present invention, a solar power generation device capable of maintaining power generation operation efficiency and active control of reverse power through control for each AC circuit by applying a distributed power converter optimized for BIPV is provided.
In the case of a solar power generation device integrated into a conventional building, since multiple solar cell modules are connected in parallel, the DC power capacity without zero point increases, causing problems with poor contact of bare threads, acceleration of heat generation, and arc generation.
However, in the present invention, by collecting AC power where the zero point of multiple solar cell modules exists, stability can be ensured even during large-capacity expansion.
Additionally, in the case of solar power generation devices integrated into conventional buildings, there was a problem of system instability factors such as blackout occurring when reverse power was generated.
However, in the present invention, the number of inverters stopped can be minimized by sequentially opening and closing the AC side in proportion to the generated reverse power.

Description

Solar power generation device capable of maintaining generation operation efficiency and active control of reverse power through control of each AC circuit by applying a distributed power converter optimized for BIPV OF AC CIRCUIT BY DISTRIBUTED POWER CONVERTOR OPTIMIZED FOR BIPV}

The present invention relates to a solar power generation device capable of maintaining power generation operation efficiency and active control of reverse power through control for each AC circuit by applying a distributed power converter optimized for BIPV.

More specifically, in the case of a solar power generation device applied to a building, if the amount of power generated is greater than the amount of power consumed, reverse power, which causes power to flow back into the grid, is generated, and if reverse power is generated from multiple solar power generation devices connected to the grid, It not only harms the stability of the system and makes the system unstable, causing phenomena such as blackout, but also has adverse effects on the system such as harmonics, voltage rise, and frequency fluctuation.

Accordingly, the present invention increases the operation rate of the solar power generation device by sequentially opening and closing the AC side of a plurality of distributed power converters installed in accordance with the generated reverse power to stop or operate it again when reverse power occurs, thereby increasing the operation rate of the solar power generation device. It is related to a solar power generation device capable of maintaining power generation operation efficiency and active control of reverse power through control of each AC circuit by applying a distributed power converter optimized for BIPV, which lowers maintenance costs.

In addition, in the case of a solar power generation device integrated into a building, since multiple solar cell modules are connected in parallel, the DC power capacity without zero point increases, causing problems with poor contact of bare threads, acceleration of heat generation, and arc generation.

The present invention is intended to solve this technical problem, by collecting AC power with zero points of multiple solar cell modules, and applying a distributed power converter optimized for BIPV that ensures stability even during large-capacity expansion, so that each AC circuit can be converted to power. It is related to a solar power generation device that can actively control reverse power and maintain power generation operation efficiency through control.

BIPV (Building Integrated Photovoltaic) refers to a solar power generation device integrated into a building. When solar power modules are shaded, the efficiency of the strings connected in series decreases.

In addition, in BIPV, it is very difficult to replace a failed solar cell module, and the color or metal border of the solar cell module discolors over time, so even if you replace it with a new solar cell module, the existing product and the new replacement product are different. Color differences cause negative problems in the aesthetics of the building.

To solve this problem, the solar power module and its devices applied to BIPV had no choice but to be designed with one series string as low as possible. In addition, maximum efficiency could be achieved only by applying one inverter with MPPT to one string.

Furthermore, the existing BIPV had many problems with the DC system, such as failure to connect in the event of an arc or fire.

Referring to FIG. 1 for a more detailed description, in the case of the prior art, solar cell module groups forming a series string are connected at the front end of the inverter. In other words, an increase in capacity occurred in the DC power stage, and the DC strategy with the combined capacity was supplied to the inverter.

Since the DC power capacity is increased by wiring small-capacity solar cell modules in parallel, the probability of arc occurrence increases due to poor contact of the screw and accelerated deterioration of the heat-generating area.

This is because DC power, unlike AC power, does not have a zero point. When an arc occurs, it does not extinguish itself, making it difficult to extinguish a fire.

In addition, parts that open, close, or block DC power are very expensive and come in a variety of types, making it difficult to apply them in the right place.

In addition, in the case of solar power generation devices applied to buildings, if the amount of power generated is greater than the amount of power consumed, reverse power is generated, which causes power to flow back into the system. If reverse power is generated from multiple solar power generation devices connected to the system, the stability of the system is compromised. It not only causes damage and instability in the system, causing phenomena such as blackout, but also has negative effects on the system such as harmonics, voltage rise, and frequency fluctuation.

Therefore, in order to eliminate this problem, power supply companies are required to block reverse power flowing from the system using reverse power relays to prevent reverse power from occurring in the system.

In the case of conventional technology, the inflow of reverse power is prevented by turning off the power to the solar power generation device when reverse power occurs. In this case, the entire power plant stops operating, resulting in power generation loss.

The technical problem that the present invention aims to solve is to provide a solar power generation device capable of maintaining power generation operation efficiency and active control of reverse power through control for each AC circuit by applying a distributed power converter optimized for BIPV with improved stability. there is.

The technical problem that the present invention aims to solve is a distributed type optimized for BIPV that minimizes the number of inverters generated when reverse power is generated by sequentially opening, closing, or stopping in proportion to the reverse power generated in the AC terminal when reverse power is generated. The purpose is to provide a solar power generation device capable of maintaining power generation operation efficiency and active control of reverse power through control for each AC circuit by applying a power converter.

Another technical problem that the present invention aims to solve is to provide a solar power generation device capable of maintaining power generation operation efficiency and active control of reverse power through control for each AC circuit by applying a distributed power converter optimized for BIPV capable of large capacity expansion. It is there.

Another technical problem that the present invention aims to solve is to apply a distributed power converter optimized for BIPV, which minimizes arc generation and facilitates fire suppression by wiring AC power with a zero point, and reverse power through control for each AC circuit. The goal is to provide a solar power generation device capable of active control and maintaining power generation operation efficiency.

Another technical problem that the present invention aims to solve is to apply a distributed power converter optimized for BIPV, which can quickly determine the presence or absence of a failure by measuring leakage, voltage and current in real time for each inverter, and reverse power conversion through control for each AC circuit. The goal is to provide a solar power generation device capable of active power control and maintaining power generation operation efficiency.

The technical problems to be solved by the present invention are not limited to those described above.

According to an embodiment of the present invention, a solar power generation device capable of maintaining power generation operation efficiency and active control of reverse power through control for each AC circuit by applying a distributed power converter optimized for BIPV according to an embodiment of the present invention is capable of maintaining DC power exceeding a predefined minimum capacity. A first solar cell module group in which at least one solar cell module is connected in series, outputting: a first inverter converting DC power output from the first solar cell module group into AC power; a second solar cell module group in which at least one solar cell module is connected in series and is parallel to the first solar cell module group, outputting DC power equal to or higher than a predefined minimum capacity; a second inverter converting DC power output from the second solar cell module group into AC power; It includes a leakage current control module and a control unit that detects leakage current of the AC power, and the output AC power from the first inverter and the output AC power from the second inverter are collected at a rear end of the leakage current control module, and the control unit Compares the amount of power generated by the solar cell module with the amount of power consumed, and when reverse power occurs where the amount of power generated is greater than the amount of power consumed, the operation of at least one of the first and second inverters is stopped. You can do it.

In one embodiment, the leakage current control module includes: a zero-phase current transformer that detects leakage of output AC power from the first and second inverters, and an amplifier that amplifies the signal of the zero-phase current transformer; An abnormality detection sensor module consisting of at least one sensor selected from a flame detection sensor, a temperature sensor, and an arc detection sensor; It may further include a control unit that blocks the AC power when an abnormality occurs based on the abnormality detection sensor module and amplifier.

According to one embodiment, the AC power passes through a relay before being supplied to the KEPCO system, and the control unit can control the relay when the abnormality occurs.

According to one embodiment, a PCB in which the relay and the abnormality detection sensor module are integrated may be provided for each output terminal of the inverter.

According to one embodiment, the control unit may determine whether leakage current occurs from a signal from the amplifier based on a predefined minimum capacity of the first solar cell module group and the second solar cell module group.

According to one embodiment, the power harvested from the first and second solar cell module groups may be converted into AC power with a zero point and then collected.

According to an embodiment of the present invention, a solar power generation device capable of maintaining power generation operation efficiency and active control of reverse power through control for each AC circuit by applying a distributed power converter optimized for BIPV according to an embodiment of the present invention is capable of maintaining DC power exceeding a predefined minimum capacity. A first solar cell module group in which at least one solar cell module is connected in series, outputting: a first inverter converting DC power output from the first solar cell module group into AC power; a second solar cell module group in which at least one solar cell module is connected in series and is parallel to the first solar cell module group, outputting DC power equal to or higher than a predefined minimum capacity; a second inverter converting DC power output from the second solar cell module group into AC power; and a leakage current control module that detects a leakage current of the AC power, and the output AC power from the first inverter and the output AC power from the second inverter can be collected at a rear end of the leakage current control module. In addition, by comparing the amount of power generated by the solar cell module with the amount of power consumed, when the amount of reverse power generated is greater than the amount of power consumed, the operation of at least one of the first and second inverters may be stopped. You can.

An inverter may be provided in response to the output terminal of each solar power module group. That is, an inverter may be provided for each solar power module group. Afterwards, the AC power output from the inverter can be collected. Accordingly, AC power with a zero point is collected, so rapid response can be possible in the event of an arc or fire.

In addition, according to one embodiment, when reverse power occurs, the AC side of a plurality of distributed power converters installed is sequentially opened and closed in proportion to the generated reverse power to stop or operate again, thereby increasing the operation rate of the solar power generation device. , this can lower maintenance costs. That is, according to one embodiment, the technical purpose of increasing power generation efficiency through the application of a distributed power supply device and minimizing the number of inverters stopped when reverse power is generated by controlling the operating quantity of the distributed power converter can be achieved. .In addition, according to one example, a leakage current control module is provided at the output terminal of the inverter, the leakage current is detected, and the relay is turned off when the leakage current is detected, thereby ensuring stability even if the capacity of the AC system increases.

Additionally, by providing multiple sensors to detect abnormalities at the inverter output stage, early response to abnormal situations may be possible.

Furthermore, since a leakage current control module in a PCB module can be easily introduced when adding a solar cell module group, expansion can be easily achieved.

Figure 1 is a diagram illustrating a solar power generation device capable of maintaining power generation operation efficiency and active control of reverse power through control for each AC circuit by applying a distributed power converter optimized for BIPV according to the prior art.
Figure 2 is a diagram illustrating a solar power generation device capable of maintaining power generation operation efficiency and active control of reverse power through control for each AC circuit by applying a distributed power converter optimized for BIPV according to an embodiment of the present invention.
Figure 3 shows in detail the leakage current control module of a solar power generation device capable of maintaining power generation operation efficiency and active control of reverse power through control for each AC circuit by applying a distributed power converter optimized for BIPV according to an embodiment of the present invention. This is a drawing for explanation.
Figure 4 is another diagram illustrating a solar power generation device capable of maintaining power generation operation efficiency and active control of reverse power through control for each AC circuit by applying a distributed power converter optimized for BIPV according to an embodiment of the present invention. .
Figure 5 is another diagram illustrating a solar power generation device capable of maintaining power generation operation efficiency and active control of reverse power through control for each AC circuit by applying a distributed power converter optimized for BIPV according to an embodiment of the present invention. am.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. However, the technical idea of the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed content will be thorough and complete and so that the spirit of the invention can be sufficiently conveyed to those skilled in the art.

In this specification, when an element is referred to as being on another element, it means that it may be formed directly on the other element or that a third element may be interposed between them. Additionally, in the drawings, the thicknesses of films and regions are exaggerated for effective explanation of technical content.

Additionally, in various embodiments of the present specification, terms such as first, second, and third are used to describe various components, but these components should not be limited by these terms. These terms are merely used to distinguish one component from another. Accordingly, what is referred to as a first component in one embodiment may be referred to as a second component in another embodiment. Each embodiment described and illustrated herein also includes its complementary embodiment. Additionally, in this specification, 'and/or' is used to mean including at least one of the components listed before and after.

In the specification, singular expressions include plural expressions unless the context clearly dictates otherwise. In addition, terms such as "include" or "have" are intended to designate the presence of features, numbers, steps, components, or a combination thereof described in the specification, but are not intended to indicate the presence of one or more other features, numbers, steps, or components. It should not be understood as excluding the possibility of the presence or addition of elements or combinations thereof. Additionally, in this specification, “connection” is used to mean both indirectly connecting and directly connecting a plurality of components.

Additionally, in the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

The present invention was created to solve the problems of the prior art, and an inverter can be connected to one circuit by dividing the DC side capacity into minimum units (for example, 700w, 1kw, 3kw).

At this time, as a way to increase capacity, capacity is increased by connecting in parallel in the AC system where a zero point exists.

As a result, it is possible to reduce current capacity accumulation and arc progression, or simply increase capacity and ensure stability by using AC power components available in various product groups.

Hereinafter, with reference to FIGS. 2 to 5, a solar power generation device capable of maintaining power generation operation efficiency and active control of reverse power through control for each AC circuit by applying a distributed power converter optimized for BIPV according to an embodiment of the present invention. will be explained in detail.

Figure 2 is a diagram illustrating a solar power generation device capable of maintaining power generation operation efficiency and active control of reverse power through control for each AC circuit by applying a distributed power converter optimized for BIPV according to an embodiment of the present invention.

A solar power generation device capable of maintaining power generation operation efficiency and active control of reverse power through control for each AC circuit by applying a distributed power converter optimized for BIPV according to an embodiment of the present invention consists of at least one solar cell module. It may include at least one of a solar cell module group (110a, 110b, 110c), a fuse (120a, 120b, 120c), a switch (130a, 130b, 130c), and an inverter (140a, 140b, 140c).

Additionally, according to one example, it may further include a solar cell module control unit (not shown) connected in parallel with the solar cell module. In addition, it may further include a connection board (not shown), and the connection board may include a fuse (120a, 120b, 120c), a switch (130a, 130b, 130c), and an inverter (140a, 140b, 140c).

When the solar power generation device is integrated and installed in a building, it may include a solar cell module group 110a, 110b, and 110c in which at least one solar cell module 110 is electrically connected in series. According to one example, the solar power generation device may be composed of one solar cell module group, or may be composed of two or more solar cell module groups. The number of solar cell module groups can be determined depending on the amount of current to be harvested.

According to one example, when solar cell modules are formed in series, the - terminals of the solar cell modules are connected to each other and are commonly grounded, and the + terminals are connected to each other and can be jointly connected with a binder.

Accordingly, solar cell modules may be configured in series with the + end connected to the - end of a neighboring solar cell module. By serially connecting solar cell modules, the required level of voltage can be obtained.

The solar cell module is a photovoltaic energy conversion system that converts light energy emitted from the sun into electrical energy.

The solar cell module may be a single crystalline silicon solar cell, a polycrystalline silicon solar cell, an amorphous silicon solar cell, an inorganic thin film solar cell, an organic solar cell, a dye-sensitized solar cell, an organic/inorganic perovskite solar cell, a quantum dot solar cell, etc. . The technical idea of the present invention is not limited to specific materials of solar cell modules.

It may further include a connection board (not shown), and the connection board may include a fuse (120a, 120b, 120c), a switch (130a, 130b, 130c), and an inverter (140a, 140b, 140c).

The inverter 140 may be provided in series at the solar cell module stages 110a, 110b, and 110c, respectively. That is, the inverter 140a is connected to the solar cell module stage 110a, the inverter 140b is connected to the solar cell module stage 110b, and the inverter (140b) is connected to the solar cell module stage 110c. 140c) can be connected.

The inverter 140 can convert DC power into AC power. AC power output from the inverter 140 may be supplied to a load, for example, the KEPCO system.

According to the prior art, a plurality of series solar cell module groups are given, and the plurality of series solar cell module groups are connected in a DC system without a zero point. Therefore, there was a problem that it was difficult to extinguish if an arc or fire occurred.

However, in one embodiment, a plurality of series solar cell module groups are provided, and an inverter may be provided for each string of series solar cell modules to convert DC power generated from the plurality of series solar cell module groups into AC. This allows wiring in the AC system with a zero point, making early suppression of arcs or fires possible.

Additionally, according to one example, stable operation can be achieved while maximizing the operation rate even when reverse power is generated.

In this document, reverse power may refer to a phenomenon in which power flows backwards into the system when the amount of power generated by a solar cell module is greater than the amount of power consumed in a solar power generation device applied to a building.

Typically, when reverse power occurs, it not only harms the stability of the system and makes the system unstable, causing phenomena such as blackout, but also has negative effects on the system such as harmonics, voltage rise, and frequency fluctuation.

Therefore, in order to eliminate this problem, power supply companies are usually required to block reverse power flowing from the system using reverse power relays to prevent reverse power from occurring in the system.

Accordingly, according to the prior art, when reverse power occurs, the inflow of reverse power is prevented by turning off the power to the solar power generation device. In this case, the entire power plant stops operating, resulting in power generation loss.

Accordingly, according to an embodiment of the present invention, when reverse power occurs, the AC side of a plurality of distributed power converters installed is sequentially opened and closed in proportion to the generated reverse power to stop or operate again, thereby increasing the operation rate of the solar power generation device. This can increase maintenance costs and lower maintenance costs.

To this end, the control unit (described later) can detect whether reverse power has occurred and, if reverse power has occurred, sequentially open and close at least one inverter to stop or restart the inverter. That is, the control unit can control the switches 130a, 130b, and 130c to stop the operation of at least one of the inverters 140a, 140b, and 140c when reverse power is generated.

Accordingly, according to one embodiment, the technical purpose of increasing power generation efficiency through the application of a distributed power supply device and minimizing the number of inverters stopped when reverse power is generated by controlling the operating quantity of the distributed power converter can be achieved. .

Figure 3 shows in detail the leakage current control module of a solar power generation device capable of maintaining power generation operation efficiency and active control of reverse power through control for each AC circuit by applying a distributed power converter optimized for BIPV according to an embodiment of the present invention. This is a drawing for explanation.

The leakage current control module 150 may be provided at the output terminal of the inverter 140. The leakage current controller 150 is for early detection and response to leakage current in the system, and includes a control unit 152, a power supply (!53), a flame detection sensor 154, an arc detection sensor 156, and a temperature sensor. (158), a display (e.g., LCD; 160), a communication circuit 162, an address 164, an image current transformer (!72), an amplifier 174, and a relay 176. there is.

According to one example, a control unit 152, a power supply (!53), a flame detection sensor 154, an arc detection sensor 156, a temperature sensor 158, a display (e.g., LCD; 160), and a communication circuit. (162), address 164, video current transformer (!72), amplifier 174, and relay 176 can be formed as an integrated PCB. In this case, an inverter is provided in series at the output terminal of the solar cell module group, and a PCB is provided at the output terminal of the inverter. Therefore, even if additional solar cell modules are introduced, the system can be easily reinforced by adding a PCB. When modularized with a PCB, there is an advantage that it can be easily applied to expansion of larger capacity.

The control unit 152 can control the overall leakage current control module 150. The control unit 152 can receive the necessary power from the power supply 153. The power supply device 153 is connected to the output terminal of the inverter (!40) and can provide AC power to the control unit (!52).

The leakage current control module 150 may have various abnormal situation detection sensors. Abnormal situations can be fire, arc, heat generation, etc.

For reference, the nominal operating temperature of a typical fire detector is set to operate at 80℃~120℃, the ignition temperature of wood/paper, etc. starts at 300℃~500℃, and the ignition temperature of PVC, etc. starts at 455℃. It begins to ignite, and the ignition temperature of butane gas ignites at 405℃, but in a fire in an enclosed space, surrounding materials ignite simultaneously and a flame is generated, so the temperature quickly rises to over 1,000℃, causing enormous damage. . Therefore, the flame detection sensor 154 can detect not only flames but also fires at the above temperature.

The arc detection sensor 156 can detect whether an arc occurs.

The temperature sensor 158 has a detection temperature around the internal terminal of 80°C to 100°C, considering that the maximum operating temperature of a solar power generation device is 125°C, or the nominal operating temperature of a flame detection sensor is 80°C to 120°C. If ℃ is measured more than twice a day, it can be judged as a sign of a fire.

The relay 176 may be a type of relay capable of measuring, blocking, and controlling leakage current in order to expand the capacity of the AC system.

The LCD 160 can output information about the status of the leakage current control module 150 and can be configured as a touch panel to receive a manager's control signal.

The communication circuit 162 may transmit a signal from the leakage current control module 150 to the outside or receive a signal from the outside. According to one example, the communication circuit !62 may provide status information to enable external monitoring.

The phase current transformer 172 may be provided at the output terminal of the inverter 140. The zero-phase current transformer 172 is a current transformer installed to detect zero-phase current and converts three-phase current into primary current, and can also be called a zero-phase shunt.

The signal from the image current transformer 172 is provided to the amplifier 172, and the amplifier 172 amplifies it and provides it to the control unit 152.

The control unit 152 may determine the presence or absence of leakage current based on the signal from the amplifier 174. Specifically, the control unit 152 may have a lookup table for determining whether to determine abnormal leakage current or normal leakage current.

Additionally, the control unit 152 may determine whether an abnormal situation exists based on signals from the flame detection sensor 154, arc detection sensor 156, and temperature sensor 158. Specifically, the control unit 152 may have a lookup table for determining whether to determine an abnormal situation or a normal situation.

The control unit 152 may turn off the relay 176 when abnormal leakage current occurs. Additionally, the control unit 152 can turn off the relay 176 even when abnormal signals are obtained from the flame detection sensor 154, the arc detection sensor 156, and the temperature sensor 158.

According to an example of the present invention, each solar cell module group (110a, 1110b, 110c...110n) may have a minimum DC power generation capacity. For example, the minimum DC power generation capacity may be 700w, 1kw, 3kw). That is, the first solar cell module group 110a has a DC capacity of 700w, the second solar cell module group 110b has a DC capacity of 1kw, and the third solar cell module group 110c has a DC capacity of 3kw. You can have it.

The control unit 152 may manage the allowable leakage current value to correspond to the DC capacity of each solar cell module group 110a, 1110b, 110c...110n. That is, the first solar cell module group 110a has a DC capacity of 700w, the second solar cell module group 110b has a DC capacity of 1kw, and the third solar cell module group 110c has a DC capacity of 3kw. In the case where , the control unit 152 can manage the lookup table so that the allowable leakage current value is proportional to each DC capacity.

Additionally, according to one example, maximum power point tracking (MPPT) control for each string may be possible.

The MPPT control technique that can be applied in solar and power generation fields is a direct control technique that finds the maximum power transfer point by varying the load control input of the inverter circuit by inputting temperature or solar radiation, which are parameters that change the maximum power operating point (MPOP). there is.

Additionally, there is a Perturb and Observe technique that periodically increases and decreases the output voltage of the solar cell module and compares the previous output power with the current output power to find the maximum power operating point.

In addition, it can be varied into an Incremental Conductance technique that tracks the maximum power operating point by comparing the conductance of the solar cell module output and the incremental conductance, a Hysterisis-band variation control technique, etc.

The control unit 152 may set a stable range for the MPPT for each string considering the DC capacity of the solar cell module group. That is, the first solar cell module group 110a has a DC capacity of 700w, the second solar cell module group 110b has a DC capacity of 1kw, and the third solar cell module group 110c has a DC capacity of 3kw. In the case of , the control unit 152 can manage the lookup table so that the maximum output safety range is proportional to each DC capacity.

Figure 4 is another diagram illustrating a solar power generation device capable of maintaining power generation operation efficiency and active control of reverse power through control for each AC circuit by applying a distributed power converter optimized for BIPV according to an embodiment of the present invention. .

Referring to FIG. 4, each leakage current control module (150a, 150b, 150c, ...150n) may be provided at the AC output terminal of each inverter (140a, 140b, 140c, ...140n).

As previously explained, the leakage current control modules (150a, 150b, 150c,...150n) can be provided as a PCB and can be easily installed at the inverter output terminal.

Each leakage current control module (150a, 150b, 150c,...150n) can be connected to R (run), S (start), T (common), and N (neutral) lines for control.

Figure 5 is another diagram illustrating a solar power generation device capable of maintaining power generation operation efficiency and active control of reverse power through control for each AC circuit by applying a distributed power converter optimized for BIPV according to an embodiment of the present invention. am.

Referring to FIG. 5, an inverter 140 and a leakage current control module 150 may be provided at the output terminal of the solar cell module 110, respectively. As described above, the output terminal of the leakage current control module 150 uses R (run), S (start), and T (common) for control. , can be connected to the N (neutral) line.

Although not shown, a sub earth leakage circuit breaker and an arc circuit breaker may be additionally provided. The sub-earth leakage circuit breaker may be provided in series at the output terminal of the solar cell module, and the output terminals of the sub-earth leakage circuit breaker may be collected and connected to the arc circuit breaker.

Additionally, in this application example, an intelligent fire monitoring sensor may be introduced as an example of a fire sensor.

Also, in this application example, a fire extinguishing stick may be provided to quickly extinguish the fire.

In the example described with reference to FIG. 5 , the leakage current control module 150 described above has been omitted, but of course, these configurations can be implemented together in the application example described with reference to FIG. 4 .

According to the solar power generation device described above, which is capable of maintaining power generation operation efficiency and active control of reverse power through control for each AC circuit by applying a distributed power converter optimized for BIPV according to an embodiment of the present invention described above, each solar power generation device An inverter may be provided in response to the output terminal of the module group. That is, an inverter may be provided for each solar power module group. Afterwards, the AC power output from the inverter can be collected. Accordingly, AC power with a zero point is collected, so rapid response can be possible in the event of an arc or fire.

In addition, according to one example, a leakage current control module is provided at the output terminal of the inverter, detects leakage current, and turns off the relay when the leakage current is detected, thereby ensuring stability even if the capacity of the AC system increases.

Additionally, by providing multiple sensors to detect abnormalities at the inverter output stage, early response to abnormal situations may be possible.

Furthermore, since a leakage current control module in a PCB module can be easily introduced when adding a solar cell module group, expansion can be easily achieved.

Above, the present invention has been described in detail using preferred embodiments, but the scope of the present invention is not limited to the specific embodiments and should be interpreted in accordance with the appended claims. Additionally, those skilled in the art should understand that many modifications and variations are possible without departing from the scope of the present invention.

110: Solar cell module group
110a: First solar cell module group
110b: Second solar cell module group
110c: Third solar cell module group
120: Fuzzy
130: switch
140: inverter
150: Leakage current control module
152: Control unit
153: Power supply
154: Flame detection sensor
156: Arc detection sensor
158: temperature sensor
160: LCD
162: Communication circuit
164: Address
172: Zero point current transformer
174: amplifier
176: relay

Claims (6)

a first solar cell module group in which at least one solar cell module is connected in series and outputs DC power equal to or higher than a predefined minimum capacity;
a first inverter converting DC power output from the first solar cell module group into AC power;
A second solar cell in which at least one solar cell module is connected in series and parallel to the first solar cell module group, outputting DC power equal to or higher than a predefined minimum capacity but outputting DC power different from that of the first solar cell module group. Battery module group;
a second inverter converting DC power output from the second solar cell module group into AC power; and
It includes a leakage current control module and a control unit that detects leakage current of the AC power,
The AC power passes through the relay of the leakage current control module before being supplied to the KEPCO system, and the control unit controls the relay when an abnormality occurs,
At the rear end of the leakage current control module, the output AC power from the first inverter and the output AC power from the second inverter are collected,
The control unit compares the amount of power generated by the solar cell module with the amount of power consumed, and when reverse power occurs where the amount of power generated is greater than the amount of power consumed, the control unit operates at least one of the first and second inverters. A solar power generation device capable of maintaining power generation operation efficiency and active control of reverse power through control of each AC circuit by applying a distributed power converter optimized for BIPV.
According to claim 1,
The leakage current control module includes: a zero-phase current transformer that detects leakage of output AC power from the first and second inverters, and an amplifier that amplifies the signal of the zero-phase current transformer; and
It includes an abnormality detection sensor module consisting of at least one sensor selected from a flame detection sensor, a temperature sensor, and an arc detection sensor,
The control unit applies a distributed power converter optimized for BIPV, which blocks the AC power when an abnormality occurs based on the abnormality detection sensor module and amplifier, and maintains power generation operation efficiency and active control of reverse power through control for each AC circuit. A solar power generation device capable of According to claim 1,
A predefined minimum capacity of the first solar cell module group and the second solar cell module group is 700W,
The second solar cell module group applies a distributed power converter optimized for BIPV, including outputting higher DC power than the first solar cell module group, to achieve reverse power active control and power generation through control for each AC circuit. A solar power generation device that can maintain operating efficiency. According to clause 2,
The relay applies a distributed power converter optimized for BIPV, in which a PCB with an integrated abnormality detection sensor module is provided for each output terminal of the inverter, enabling active control of reverse power and maintenance of power generation operation efficiency through control for each AC circuit. Optical power generation device. According to clause 3,
The control unit,
Based on the capacities of the first solar cell module group and the second solar cell module group, a distributed power converter optimized for BIPV is applied to check whether leakage current occurs from a signal from an amplifier, and through control for each AC circuit. A solar power generation device capable of active control of reverse power and maintaining power generation operation efficiency. According to claim 1,
The power harvested from the first and second solar cell module groups is converted into AC power with a zero point, and then collected, and reverse power is activated through control for each AC circuit by applying a distributed power converter optimized for BIPV. A solar power generation device that can be controlled and maintain power generation operation efficiency.