KR101470864B1 - Integration gateway for Power Conditioning System of renewable energy generator and bidirectional meter - Google Patents

Abstract

The present invention relates to an integrated gateway for PCS for a new renewable generation facility and a bi-directional meter, wherein an external system power is serially connected to a PCS for the operation of a new and renewable power generation facility so that the power of the external system power is supplied to the customer through the PCS 1. A gateway for transmitting power information data in a system, comprising: an external system power input terminal connected to the external system power; A power supply output terminal for outputting the external system power or the PCS power to the customer distribution panel; Selectively connecting the external system power input and the PCS or the power supply output stage to cause the external system power to flow into the consumer distribution board through the PCS or to power the external system power via the bypass path to the consumer distribution panel A bypass path setting unit for setting a power supply path for introducing the power supply path; And a bi-directional meter disposed at the power supply output terminal and installed in the customer, and a communication unit for receiving the power information data from the PCS and transmitting the power information data to the power management center. According to the present invention, Through the integrated gateway for PCS, it is possible to supply stable electric power to the customer even in case of PCS abnormality or external system power failure in supplying power from the PCS of the new and renewable generation facility placed in the customer to the customer and external system power.

Description

[0002] The present invention relates to an integrated gateway for a PCS for a renewable power generation facility and a bidirectional meter,

More particularly, the present invention relates to a gateway for data transmission of a bi-directional meter installed in a customer and is always supplied with power for 24 hours, For the PCS to supply external system power to the customer via the bypass path in case of PCS problem in the power system where the PCS for the PCS is connected in series with the external system power and supplies power to the customer .

In response to the recent low-carbon green growth policy trend, the development of new and renewable energy generation facilities is actively being promoted due to the increase in the need for renewable energy sources. As a result, consumers in general houses, large-scale apartment buildings, The ratio of supplying power by itself by building power generation facilities using energy sources is increasing.

Such renewable energy generation facilities include new and renewable generation devices such as wind power, tidal power, and solar power, energy storage system ESS (Energy Storage System) for storing generated power, and PCS (Power Conditioning System) With the recent growth of Smart Grid related technology, it is possible to consume the electricity produced by the renewable energy source at the customer while transmitting the extra production power through the external grid.

In the case of the presently constructed customer's renewable energy generation facility, a structure is shown in which the PCS is connected in series with the external system power and the power is supplied to the customer through the PCS. FIG. 1 shows that such external system power is connected to the PCS And a power supply system for supplying electric power to the home.

Although the power supply system of the home is described with reference to FIG. 1, it is one embodiment for illustrative convenience. The assumption in FIG. 1 can be replaced by various customers such as a large apartment complex, a building, and an industrial facility have.

The renewable power generation facility 40 is composed of a PCS 50, a solar photovoltaic device 41 and an energy storage device 43. The external grid power 30 is connected in series with the PCS 50, The electric power is supplied to each load 70 from the cigarette distribution panel 60.

This configuration is for selectively controlling the power supplied to the customer by the PCS 50 to effectively utilize the supply power from the external grid power 30 and the production power of the renewable power generation facility 40.

However, in the power supply system in which the external grid power 30 shown in FIG. 1 is connected in series with the PCS 50 to supply electric power to the customer, when a problem occurs in the PCS 50, And the power of the energy storage device 43 as well as the external system power 30 are not supplied to the customer, the power supply to the customer is completely blocked.

In addition, under the smart grid environment, a bi-directional meter 20 is installed to measure the amount of power such as power transmission and reception, and information such as power data and PCS operation status through the bi-directional meter 20 is transmitted to the power management center A gateway 10 is provided for transmitting these data to be transmitted.

However, in the customer, the user habitually removes the plug connected to the outlet to cut off the standby power for power saving. Due to such a habit, the plug of the gateway 10 is disconnected from the outlet and the bidirectional meter 20 Can not be transmitted to the power management center 90 and the operation information of the PCS 50 of the new and renewable power generation facility 40 can not be transmitted to the power management center 90. As a result, The smart grid system for improving energy efficiency is becoming unfavorable.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art as described above, and it is an object of the present invention to provide a system and method for supplying power to a customer from a PCS of a new- The main objective is to provide an integrated gateway that can supply stable power to the customers even in the event of an emergency.

In particular, when the PCS of a customer's renewable generation facility is connected in series with external system power, the power supply to the customer is interrupted when a problem occurs in the PCS due to the supply of renewable generation power and external system power to the customer .

In addition, the power of the gateway for transmitting the power information data of the bidirectional meter and the power information data of the PCS, which measure the power consumption due to the habit of removing the plug connected to the socket outlet for the user to cut off the standby power for power saving, So that the power information can not be transmitted to the power management center.

According to an aspect of the present invention, there is provided a power system in which external system power is serially connected to a PCS (Power Conditioning System) for operating a renewable power generation facility, and the external system power is supplied to a customer through the PCS A gateway for transmitting power information data, comprising: an external system power input terminal connected to the external system power; A power supply output terminal for outputting the external system power or the PCS power to the customer distribution panel; Selectively connecting the external system power input and the PCS or the power supply output stage to cause the external system power to flow into the consumer distribution board through the PCS or to power the external system power via the bypass path to the consumer distribution panel A bypass path setting unit for setting a power supply path for introducing the power supply path; And a bidirectional meter disposed at the power supply output terminal and installed in the customer, and a communication unit for receiving the power information data from the PCS and transmitting the power information data to the power management center.

Preferably, the bypass path setting unit includes: a system protection blocking module for selectively connecting the external system power input terminal and the input terminal of the PCS to connect the external system power to the PCS in series; A path switching module for interfacing with the system protection cut-off module and selectively connecting the external system power input terminal and the power supply output terminal according to the operation of the system protection cut-off module and directly introducing the external system power into the customer distribution panel; And a load protection cut-off module for selectively connecting the output terminal of the PCS and the power supply output terminal in accordance with the operation of the system protection cut-off module in cooperation with the system protection cut-off module, .

More preferably, the communication unit may be configured to always receive power from the power output to the consumer distribution panel through the power supply output terminal.

The bypass path setting unit may further include a control module for monitoring the operation status of the PCS to determine whether the failure has occurred and controlling the operation of the system protection blocking module, the path switching module, and the load protection blocking module .

Preferably, in the normal operation of the PCS, the control module may be configured such that the system protection cut-off module and the load protection cut-off module are turned on and the path switching module is turned off, Wherein the system protection shutdown module and the load protection shutoff module are turned off and the path switching module is turned on so that the external system power is switched to the power saving mode when the trouble occurs in the PCS, It can be directly introduced into the consumer distribution panel.

Further, the communication unit communicates with the bidirectional meter and the PCS through a power line communication method through a power supply path, and transmits the power information data transmitted from the bidirectional meter and the PCS to a power management center through wired or wireless communication. Lt; / RTI >

Preferably, the external system power input may include a surge protector for blocking surges flowing through the external power line.

Further, the integrated gateway for PCS may be provided in the PCS and integrated into the PCS.

According to the present invention, in supplying the power from the PCS of the new and renewable power generation facility placed in the customer and the external system power to the customer through the integrated gateway for PCS, even when the PCS abnormality or the power failure of the external system power, So that stable power can be supplied.

In particular, even if the PCS of the customer's renewable generation facility is connected in series with the external grid power and the external system power is supplied to the customer through the PCS, even if the PCS problem occurs, the bypass path through the PCS integration gateway It is possible to provide stable power supply without interruption of power supply to the customer by supplying external grid power to the customer.

In addition, since the habit of removing the plug connected to the outlet to reduce the power consumption of the user in the customer, the problem of the power source of the bidirectional meter for measuring the power consumption and the gateway for power information transmission of the PCS is cut off, By providing a gateway, the power operation efficiency of the Smart Grid can be further increased.

Figure 1 shows a schematic diagram of a power supply system in which external system power according to the prior art is connected in series with the PCS to supply power to the customer,
FIG. 2 is a schematic diagram of a power supply system equipped with an integrated gateway for PCS for a new-generation power plant and a bi-directional meter according to the present invention,
3 shows a schematic configuration diagram of an integrated gateway for PCS according to the present invention,
Figure 4 shows a power supply configuration diagram of a consumer according to the invention during normal operation of the PCS,
Figure 5 shows a power supply configuration diagram of a consumer according to the invention in the event of a PCS problem,
FIG. 6 shows a schematic configuration diagram of power information data transmission through an integrated gateway for PCS according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.

First, the terminology used in the present application is used only to describe a specific embodiment, and is not intended to limit the present invention, and the singular expressions may include plural expressions unless the context clearly indicates otherwise. Also, in this application, the terms "comprise", "having", and the like are intended to specify that there are stated features, integers, steps, operations, elements, parts or combinations thereof, But do not preclude the presence or addition of features, numbers, steps, operations, components, parts, or combinations thereof.

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 present invention establishes a power supply bypass path for supplying stable power to a customer from a power supply system in which external system power is serially connected with a PCS of a renewable generation facility and the power of a customer is supplied via PCS It is an integrated gateway for PCS that is always powered on 24 hours a day for the data transmission of the bidirectional meter installed in the customer.

FIG. 2 shows a schematic diagram of a power supply system including an integrated gateway for PCS for a new-generation power plant and a bi-directional meter according to the present invention.

In the embodiment of FIG. 2, a power supply system of a home to which an integrated gateway for PCS according to the present invention is applied will be described. However, the power supply system of the home is applied to one embodiment. And the integrated gateway for PCS according to the present invention can be applied to the power supply system of various customers.

Referring to FIG. 2, the household power supply system to which the integrated gateway for PCS 100 according to the present invention is applied will now be described. The external power supply 30 is connected in series to the PCS 50, The integrated gateway 100 for PCS according to the present invention is disposed between the external system power 30 and the PCS 50 and is connected to the input and output of the PCS 50, A more detailed description of the present invention will be described in more detail with reference to the following embodiments.

The integrated gateway 100 for PCS according to the present invention is disposed between the external system power 30 and the PCS 50 and is connected to the domestic distribution board 30 via the PCS 50 from the external system power 30, When a problem occurs in the PCS 50, a bypass path is formed and a power supply path for directly connecting the external system power 30 to the domestic distribution board 60 is established .

The integrated gateway for PCS 100 according to the present invention can be used as a PLC communication method using the power supply path formed with the bidirectional meter 20 and the PCS 50 and to provide the power information data of the bidirectional meter 20 and the power of the PCS 50 And transmits and receives the power information data to and from the power management center 90 by using various wireless communication networks such as a PLC, a public telephone network, a wired Internet network, a wired communication network, a mobile communication network, .

In addition, since the integrated gateway 100 for PCS according to the present invention receives power using the formed power supply path, stable power can be supplied at all times for 24 hours.

Hereinafter, the configuration and operation of the integrated gateway for PCS for the new and renewable power generation facilities and the bidirectional meter according to the present invention will be described in detail.

FIG. 3 shows a schematic configuration diagram of an integrated gateway for PCS according to the present invention.

The integrated gateway 100 for PCS according to the present invention includes an external system power input terminal 110, a power supply output terminal 170, a communication unit 150, and a bypass path setting unit 130.

The external system power input terminal 110 is supplied with external system power 30 and the power supply output stage 170 provides external system power 30 or the power of the PCS 50 to the power distribution board 60.

The communication unit 150 is disposed adjacent to the power supply output terminal 170 or disposed to be included in the power supply output terminal 170 to transmit and receive power information data to and from the bidirectional meter 20 and the PCS 50, And transmits and receives power information data to and from the power management center 90 by using the power management information.

The bypass path setting unit 130 forms a power supply path for connecting the external system power 30 and the PCS 50 in series and supplying electric power to the receptacle distribution panel 60 via the PCS 50, The system power 30 is directly connected to the receptacle distribution panel 60 to form a bypass power supply path.

The bypass path setting unit 130 may include a system protection blocking module 131, a load protection blocking module 133 and a path switching module 135. When the protection blocking module 133 is connected to the external The system protection cut-off module 131 connects the external system power 30 and the input terminal of the PCS 50 via the system power input terminal 110 and the output terminal of the PCS 50 and the power distribution board 60 To form a series connection between the external grid power 30 and the PCS 50 to form a power supply path through which the external grid power 30 is supplied to the receptacle distribution panel 60 via the PCS 50 do.

The bypass path setting unit 130 sets the bypass path setting unit 130 to directly switch the external system power 30 that is input through the external system power input terminal 110 to the customer distribution board 60 through the power supply output stage 170, Thereby forming a bypass power supply path.

In addition, the bypass path setting unit 130 monitors the operation state of the PCS 50 and controls the system protection blocking module 131, the load protection blocking module 133, and the path switching And a control module (not shown) for operating the module 135.

Further, the external system power input terminal 110 may include a surge protector 115 for blocking a surge flowing through the external power line. The surge protector 115 may include a PCS integrated gateway 100, Although the external system power input terminal 110 is shown as including the surge protector 115 in the embodiment shown in FIG. 3, the external system power 30 can be used to protect the PCS 50, Lt; RTI ID = 0.0 > of the < / RTI > power supply path.

An operation of the bypass path setting unit 130, which is a first characteristic configuration for forming a power supply path in the PCS integrated gateway 100 according to the present invention, will be described with reference to an embodiment.

Figure 4 shows a power supply configuration diagram of a consumer according to the invention in normal operation of the PCS.

The control module monitors the operation state of the PCS 50 and turns on the operations of the system protection blocking module 131 and the load protection blocking module 133 when it is determined that the PCS 50 is operating normally, The operation of the route switching module 155 is turned off.

4, a power supply path is formed along the path of the arrow through the bypass path setting unit 130 of the PCS integrated gateway 100. The power supply path is connected to the external system power input terminal 110 The external system power 30 is drawn into the input stage of the PCS 50 via the system protection cutoff module 131 and the power output through the PCS 50 is supplied to the load protection cutoff module 133 connected to the output stage of the PCS 50 And is introduced into the receptacle distribution panel 60 through the power supply output terminal 170. [

Since the external system power 30 according to the power supply path is sequentially supplied to the consumer distribution panel 60 through the system protection cut-off module 131, the PCS 50 and the load protection cut-off module 133, A series connection path is formed in which the grid power 30 is connected to the receptacle distribution panel 60 via the PCS 50 to form a power supply path capable of power control through the PCS 50 during normal operation of the PCS 50 .

Next, FIG. 5 shows a power supply configuration diagram of a customer according to the present invention when a PCS problem occurs.

If the control module monitors the operating state of the PCS 50 and determines that a problem has arisen in the operating state of the PCS 50, the operation of the system protection blocking module 131 and the load protection blocking module 133 is turned off ), And the operation of the path switching module 155 is turned ON.

5, a power supply path is formed through the bypass path setting unit 130 of the PCS integrated gateway 100 according to the path indicated by the arrow. The power supply path is connected to the external system power input terminal 110 The external grid power 30 is provided to the consumer distribution panel 60 via the power supply output stage 170 after being introduced into the path switching module 135.

The external system power 30 according to the power supply path is provided directly to the customer distribution panel 60 through the path switching module 135 so that the external system power 30 is substantially bypassed through the PCS 50 A power supply path provided to the customer through the path is formed.

According to the first characteristic configuration of the integrated gateway for PCS according to the present invention as described above, in supplying the power from the PCS of the new and renewable power generation facility disposed in the customer and the external system power to the customer, Especially, PCS of the customer's new and renewable power generation system is connected in series with external system power, and external system power is supplied to the customer through PCS. It is possible to provide stable power supply without interruption of power supply to the customers by supplying the external system power to the customer by using the bypass path.

The PCS integrated gateway according to the present invention has a second characteristic configuration in the method of transmitting the power information data. FIG. 6 shows a schematic configuration diagram of the power information data transmission through the PCS integrated gateway according to the present invention .

First, the communication unit 150 of the PCS integrated gateway 100 according to the present invention basically receives power through the power supply lines shown in the embodiments of FIGS. 4 and 5, Unlike the supply method, stable power supply is ensured 24 hours a day.

The communication unit 150 uses a PLC communication method with the bidirectional meter 20 and the PCS 50 and can select and use various wired and wireless communication methods depending on the situation with the power management center 90. For example, In the case where a power supply line is formed through the PCS 50 as shown in the embodiment, the bi-directional meter 20 and the PCS 50 can perform PLC communication via the communication path B shown in FIG. 6, When the bypass power supply line is formed as shown in the embodiment of FIG. 5, the bi-directional meter 20 performs the PLC communication through the A communication path and the PCS 50 performs the PLC communication through the C communication path.

Further, the communication unit 150 and the power management center 90 use a communication network 80 suitably selected according to various situations among various wireless communication networks such as a PLC, a public telephone network, a wired Internet network, various wired communication networks, a mobile communication network, So that power information data can be transmitted.

If the PCS integrated gateway 100 uses the PLC communication method between the bi-directional meter 20 and the PCS 50, a separate communication line such as RS485 or RS232 for power information data transmission becomes unnecessary, A biometric meter 20 for measuring the amount of power consumption due to the habit of removing a plug connected to an outlet in order to reduce power consumption by a user in a customer and a power source of a gateway for power information transmission of the PCS 50 are cut off The power management efficiency of the smart grid can be further increased by providing the integrated gateway 100 for the PCS to which power is constantly supplied.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments of the present invention are not intended to limit the scope of the present invention but to limit the scope of the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents thereof should be construed as being included in the scope of the present invention.

10: gateway, 20: bidirectional meter,
30: External grid power, 40: New and renewable power generation facilities,
41: solar photovoltaic device, 43: energy storage device,
50: PCS, 60: consumer distribution panel,
70: consumer load, 90: power management center,
100: Integrated gateway for PCS,
110: external power input terminal, 115: surge protector,
130: bypass path setting unit, 131: system protection shutoff module,
133: load protection blocking module, 135: path switching module,
150: communication unit, 170: power supply output stage.

Claims (8)

A gateway for transmitting power information data in a power system in which external system power is serially connected to a power conditioning system (PCS) for operation of a new and renewable power generation facility and the external system power is supplied to the customer through the PCS,
An external system power input connected to the external system power;
A power supply output terminal for outputting the external system power or the PCS power to the customer distribution panel;
Selectively connecting the external system power input and the PCS or the power supply output stage to cause the external system power to flow into the consumer distribution board through the PCS or to power the external system power via the bypass path to the consumer distribution panel A bypass path setting unit for setting a power supply path for introducing the power supply path; And
A bidirectional meter disposed at the power supply output terminal and installed in the customer, and a communication unit for receiving the power information data from the PCS and transmitting the power information data to the power management center. The method according to claim 1,
Wherein the bypass path setting unit
A system protection cutoff module for selectively connecting the external system power input terminal and the input terminal of the PCS to connect the external system power to the PCS in series;
A path switching module for interfacing with the system protection cut-off module and selectively connecting the external system power input terminal and the power supply output terminal according to the operation of the system protection cut-off module and directly introducing the external system power into the customer distribution panel; And
And a load protection cut-off module for selectively connecting the output terminal of the PCS and the power supply output terminal in accordance with the operation of the system protection cut-off module in cooperation with the system protection cut-off module to supply power from the PCS to the consumer distribution board Wherein the PCS integrated gateway comprises: The method according to claim 1,
Wherein,
Wherein the power is always supplied from the power output to the receptacle distribution panel through the power supply output terminal. 3. The method of claim 2,
Wherein the bypass path setting unit
Further comprising a control module for monitoring an operation state of the PCS to determine whether a failure has occurred, and controlling operations of the system protection blocking module, the path switching module, and the load protection blocking module according to the fault, . 5. The method of claim 4,
The control module includes:
During normal operation of the PCS, the system protection cut-off module and the load protection cut-off module are turned on and the path switching module is turned off so that the external system power is supplied to the consumer distribution panel via the PCS Lt; / RTI &
The system protection cut-off module and the load protection cut-off module are turned OFF and the path switching module is turned ON when a problem of the PCS occurs, and the external system power is directly introduced into the customer distribution panel Integrated gateway for PCS. The method of claim 3,
Wherein,
Communicates with the bi-directional meter and the PCS in a PLC (Power Line Communication) manner through a power supply path,
And the power information data transmitted from the bi-directional meter and the PCS is transmitted to the power management center through wired or wireless communication. The method according to claim 1,
Wherein the external system power input terminal comprises:
And a surge protector for blocking a surge flowing through the external power line. 8. The method according to any one of claims 1 to 7,
Wherein the PCS integrated gateway is provided in the PCS.

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