KR101311349B1 - Grid-Connected Control and Monitoring System for Street Light - Google Patents

Abstract

The streetlight supervisory control system is installed in the streetlight to produce DC power through natural energy, a grid-connected inverter that converts the DC power produced by the power generator into AC power and transmits it to a commercial system. A plurality of streetlight controllers that turn on the streetlights using AC power supplied from a commercial system for a period of time, monitor individual streetlights and short circuits of the streetlights, and a distribution box connected to them to control the lighting of each streetlight according to the generated power. It includes a controller. The distribution box controller recognizes the dark weather or tracks the failure of the power generation function in consideration of the relationship between the individual generated electric power of the street lamp and the generated electric power of the adjacent street lamp, and effectively controls the lighting of the street lamp.
According to this, it is possible to supply power efficiently by using natural energy, to stably operate street lights without running out of electric power, to perform efficient maintenance and repair, and to monitor the amount of power produced by individual street lights. It can be used for control.

Description

Grid-Connected Control and Monitoring System for Street Light}

The present invention relates to a streetlight monitoring control system, and more particularly to a streetlight monitoring control system using solar light or wind power generation.

Initially, street lamps were operated by a local manager to manually turn on / off the circuit breaker, but as the automation was performed, the street lamps were developed to be turned on by a power source, that is, a commercial power source.

However, if the collective lighting method using a commercial power source is applied, a huge power loss occurs in order to perform the role of a street lamp that illuminates the street at night, and there is a problem that it is difficult to properly detect and cope with individual failures of the street lamp. .

On the other hand, the development of alternative energy technology using solar light or wind power, and the production of solar energy and wind energy increases, the technology that combines alternative energy to the street light has been introduced.

Conventional photovoltaic street light or wind power street light is a battery type, and converts solar and wind power received during the day into electrical energy and stores it in a battery, which is used at night.

However, in the case of the battery-type solar / wind power street light, the maintenance cost required for frequent failure and replacement of the battery is continuously required.

In addition, when the initial cost is increased due to the purchase of expensive batteries, and when the amount of power generation is insufficient, such as cloudy weather, there is a problem that the street lamp does not operate at night because the batteries are not sufficiently charged.

If a low capacity storage battery is used, the use of a high output lamp is impossible. In order to solve this problem, when a low-light three-wavelength lamp or a light emitting diode (LED) is used as an illumination source, there is a problem that the street light becomes dark due to the storage power limitation of the battery.

Korean Patent Registration No. 10-1025222

The present invention has been proposed in order to solve the problems of the prior art as described above, the object of which is to provide an efficient power supply using natural energy, street light monitoring control system that can stably operate the street light without a power gap To provide.

Another object of the present invention is to provide a streetlight monitoring and control system that can perform efficient maintenance by grasping the short-circuit of the streetlight, failure, abnormality of power generation function through a wireless communication network.

Still another object of the present invention is to provide a streetlight monitoring control system that can be utilized for point / light control by monitoring the amount of power produced by individual streetlights.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not to be construed as limiting the invention as defined by the appended art. It will be possible.

Street light monitoring control system according to the present invention is installed in the street light generator for generating DC power through photovoltaic power generation; A grid-connected inverter converting the DC power produced by the power generation device into AC power and transmitting the power to a commercial system; A streetlight controller for lighting the streetlight by using an AC power supplied from a commercial system during a night time, and monitoring an amount of power generated by the streetlight and a short circuit; And a distribution box controller connected to the plurality of street light controllers to control whether each street light is turned on in accordance with the amount of generated power.
The distribution box controller may selectively perform individual control, group control, and integrated control on the target street lights through a plurality of connected street light controllers.

The street light controller may determine a night time for lighting the street light based on a street lamp blinking schedule, a sunrise time, and a sunset time.

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The distribution box controller may determine that the individual generated electric power of the street light is below a threshold value, and determine that the weather is dark, and control the street light to be turned on using AC power supplied from a commercial system regardless of time.

The distribution box controller may track the failure of the power generation function through the difference between the amount of generated power of the street lamp and the amount of generated power of the adjacent street lamp adjacent to the street lamp.

The distribution box controller determines that the dark power is determined as dark weather when the amount of generated power of the street light is less than or equal to a threshold value and the difference between the generated power of the street light and the generated power of the adjacent street light adjacent to the street light is within a predetermined standard deviation. Regardless, the street lamp may be controlled to be turned on using AC power supplied from a commercial system.

The street light monitoring control system may further include a control server wirelessly connected to the distribution box controller to remotely control and monitor each street light. In this case, the distribution box controller connects to the control server through an access node of a wireless communication network, and the control server stores a basic information table matching the street light information and the manager information, and the amount of generated power for each street light provided by the distribution box controller. In addition, the operation status of each street light is individually monitored through monitoring information including power consumption, a short circuit, and whether lighting is turned on, and wirelessly transmits the monitoring result to a manager mobile phone of each street light using a wireless communication network.

The power generation device can produce a DC power source using photovoltaic energy and wind power.

According to the streetlight monitoring control system of the present invention, while providing an efficient power supply using natural energy, it is possible to stably operate the streetlight without a power gap.

In addition, it is possible to carry out efficient maintenance by grasping the short-circuit and failure of the street light and abnormality of the power generation function through the wireless communication network.

In addition, the amount of power produced by individual streetlights can be monitored and used to control the lighting.

1 is a view showing the configuration of a grid-associated street light monitoring control system according to an embodiment of the present invention.
2 is a view for explaining the operation of the street lamp controller and the distribution box controller connected to the street lamp of FIG.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the grid-based street light monitoring control system according to an embodiment of the present invention.

1 is a view showing the configuration of a grid-associated street light monitoring control system according to an embodiment of the present invention.

Referring to FIG. 1, a streetlight monitoring control system according to an exemplary embodiment may include a plurality of streetlights 100 installed at a site, a distribution box controller 200 connected thereto, an access node 310 of a wireless communication network, and a wireless internet gateway. Control center 400 for wirelessly connecting to the distribution box controller 200 through 320 to perform the remote monitoring and control of each street light (100).

According to one embodiment, the power obtained from the street lamp 100 using solar light and wind power is transmitted to the commercial system 500, the street lamp 100 from the commercial system 500 during the night time when the street lamp 100 is turned on Power is supplied in the direction to be used as a power source of the street lamp 100.

The distribution box controller 200 is connected to the plurality of street lamps 100 and controls the point / lighting of each street lamp 100 according to the amount of generated power.

In addition, the distribution box controller 200 is connected to the control server 410 through the access node 310, such as a base station in the wireless communication network and the wireless Internet gateway 320 to communicate with the control server 410 failure / monitoring / control information Send and receive

The distribution box controller 200 collects monitoring information including individual generation power, use power, leakage current, and lighting of the street lamps 100 from the plurality of connected street lamps 100 and transmits them to the control server 410. . Wireless communication with the control server 410 may not be limited by network installation by utilizing a pre-installed wireless communication network (eg, CDMA network, etc.).

In this case, the distribution box controller 200 may be a device that can be connected to various types of wireless communication networks. For example, the distribution box controller may support wireless communication using a Code-Division Multiple Access (CDMA) module, a Trunked Radio System (TRS), a Very High Frequency (VHF) modem, or the like to implement a connection with the control server 410.

In addition, the distribution box controller 200 receives the control command from the control server 410 in real time to control the street lamp 100 directly, or through the streetlight flashing schedule, sunrise time and sunset time received in advance from the control server 410 The street lamp 100 may be controlled by a predetermined time.

As the distribution box controller 200 connected to the plurality of street light controllers 140 collects and provides monitoring information on individual generated power, used power, and leakage of each street light 100 to the control server 410, the control server. 410 is wirelessly connected to the distribution box controller 200 through an access node 310 and a wireless internet gateway 320 of a wireless communication network (eg, a CDMA network, etc.) to remotely control and monitor each street lamp 100. Done.

The control center 400 is composed of a control server 410 and one or more control client terminal 420, it can generate a failure / monitoring information in the form of a text message, if necessary, can be wirelessly transmitted using a wireless communication such as CDMA. The control client terminal 420 is a device such as a personal computer (PC) capable of connecting to the control server 410 through a local area network (LAN).

The control server 410 in the control center 400 stores and stores a database of basic information tables matching the street light information and the manager information, and generates the amount of power generated by each street lamp provided by the distribution box controller 200, the amount of power used, a short circuit, and lighting. The monitoring state of each street light 100 through the monitoring information on whether to individually monitor, and wirelessly transmits the monitoring results to the manager mobile phone 330 of each street light 100 using wireless communication (eg, CDMA). .

In particular, when a power generation function failure or an event occurs in the street lamp 100, the control server 410 recognizes the related information through the monitoring information for each street lamp provided by the distribution box controller 200 (power generation amount, power consumption, leakage status, etc.). The information is wirelessly transmitted to the manager's mobile phone 330 in the form of a text message such as SMS (Short Message Service) or MMS (Multimedia Message Service).

The control server 410 constitutes a Graphic User Interface (GUI), and can easily check the amount of power generated by each street light, a short circuit, and a failure. In addition, through the control center 400 to check the status of each street light 100 in real time from the remote can quickly cope with a problem occurs, so that the maintenance and repair of the system is easy, and the reliability is high.

The access node 310 such as a base station communicates with the wireless Internet gateway 320 through wireless communication such as CDMA. The wireless internet gateway 320 transmits and receives a control signal to and from the control server 410 using wireless communication such as CDMA.

As such, one embodiment is connected to the grid using the solar and wind power generation, using power supplied from the commercial system 500 at night, and during the day to transmit the generated power back to the commercial system 500 to save energy It can achieve, and can increase the reliability of the street lamp (100).

In addition, an embodiment may simultaneously implement the power generation monitoring and streetlight control / monitoring functions of the individual streetlights 100 through the control center 400, and not only monitor the generated power of the entire streetlights 100, but also individual streetlights. By monitoring the amount of power generated by the power generation unit 100, the power generation state of each street light 100 may be individually and in real time.

2 is a view for explaining the operation of the street lamp controller and the distribution box controller connected to the street lamp of FIG.

In one embodiment, the distribution box controller 200 and the street lamp controller 140 are connected to each other by a power supply line for receiving AC power from the commercial system 500. When each street light controller 140 and the distribution box controller 200 performs a power line communication (PLC) communication using a power supply line, it is possible to reduce the additional communication cost is efficient.

As shown in FIG. 2, each street lamp 100 is provided with a power generation device 120 and a grid-connected inverter 130.

In addition, each street light 100 has a street light controller 140 individually, the distribution box controller 200 is connected to a plurality of street light controllers 140 provided for each street light 100 by PLC communication.

2 illustrates a case where two lamps 111 and 112 are provided in the street lamp 100, but the present invention is not limited thereto, and the number of lamps 110 may vary according to embodiments. to be.

The power generation device 120 is to produce DC power through natural energy, and mainly produces solar power and wind power using DC power during the daytime when the street light 100 is turned off. For example, the solar cell 122 and the wind generator 121 and the like.

In relation to the power generation device 120, in one embodiment, it is assumed that the case of producing a DC power by applying the solar power and wind power at the same time, the configuration of producing a DC power by using the wind power generation is May be omitted accordingly.

The DC power generated using solar light and wind power in the power generation device 120 of the street lamp 100 is converted into AC power through the grid-connected inverter 130 and then transmitted to the commercial system 500.

The grid-connected inverter 130 converts DC power produced by solar power and wind power in the power generation device 120 into AC power, and serves to transmit power toward the commercial system 500.

The street lamp controller 140 is for controlling the lighting and turning off of the connected street lamp 100. The lamp 110 of the street lamp 100 uses AC power supplied from the commercial system 500 toward the street lamp 100 during the night time. ) Lights up. At this time, the street lamp controller 140 may control the lighting and turning off of the lamps 111 and 112 through the relay switch units SW1 and SW2 connected to the lamps 111 and 112.

The above-described street lamp controller 140 may determine a night time for lighting the street lamp 100 by a street lamp blinking schedule, a sunrise time, and a sunset time.

Specifically, one embodiment is based on the streetlight flashing schedule, sunrise time and sunset time set in advance in the streetlight controller 140 or the control center 400, or set in real time in the remote control center 400, the night time The streetlight 100 may be controlled by the determined night time.

In addition, the street lamp controller 140 measures and monitors the amount of power generated, the amount of power used, and whether there is a short circuit of the connected street lamp 100, and notifies the distribution box controller 200 of the corresponding information through PLC communication.

To this end, as illustrated in FIG. 2, CT (Current Transformer) 151 and 152 for monitoring the generated power amount at each position of a wire connected to the power generation device 120 and the lamp 110 of the street lamp 100, the amount of power used Surveillance current transformers (153, 154) and ground fault detection zero phase current transformer (ZCT) 155 may be installed.

The street lamp controller 140 generates power of the street lamp 100 through CT power generation power monitoring CTs 151 and 152 for passing a signal transmitted from the power generation device 120 of the street lamp 100 to the grid-connected inverter 130. It measures the abnormality of the power generation function by using the measured amount of generated power.

At this time, the position of the CT (151, 152) for monitoring the amount of power generated by the photovoltaic and wind power generation may be the front end of the grid-connected inverter 130, as shown in FIG. It can also be the end of).

Similarly, the street light controller 140 uses streetlights through the power consumption monitoring CTs 153 and 154 for passing the signal transmitted from the commercial system 500 to the lamp 110 of the street lamp 100 and the short circuit detecting ZCT 155. The amount of power used and a short circuit are detected.

When two lamps 110 of the street lamp 100 are provided, two CTs 153 and 154 for monitoring the amount of power used are connected to the lamps 111 and 112. The ground fault detection ZCT 155 may detect a ground fault occurring in the two lamps 111 and 112. The street light controller 140 detects a short circuit of the two lamps 111 and 112 through the ground fault detection ZCT 155, and turns off all of the lamps 111 and 112 of the street light 100 when a short circuit is detected on either side. do.

Meanwhile, referring to FIG. 2, the operation of the distribution box controller 200 will be described.

As described above, each street light controller 140 measures the amount of generated power generated by the solar cell 122 and the wind generator 121 installed in the street light 100, the amount of power used and the leakage of the PLC by using a power supply line communication To the distribution box controller 200.

Therefore, the distribution box controller 200 may separately monitor the amount of power generated by the power generation device 120 and the short circuit of the power generation device 120 installed in each street light 100, and based on the amount of generated power of the street light 100, Lighting can be controlled.

In one embodiment, when the individual generated power amount of the street lamp 100 is below the threshold, the distribution box controller 200 determines that the dark weather (eg, cloudy, snow, rain, etc.), the commercial system 500 regardless of the current time By using the AC power supplied from the street light 100 is controlled to be turned on.

For example, when the weather is clouded and the amount of photovoltaic power generation is small, even in daytime time, the distribution box controller 200 may turn on the street lamp 100 to implement street light control through the weather and power generation power.

However, when only the amount of generated power of one street light 100 is a reference, it may be difficult to determine whether the weather is affected or whether the power generation function is broken.

Thus, by gathering information on the amount of power generated by the individual power generation and other street light (s) together, it is possible to track the failure of the power generation function through the difference between the power generation.

That is, in another embodiment, the distribution box controller 200 may consider the relationship between the weather, the amount of power generated by the individual street light 100, and the amount of power generated by the adjacent street light (s) adjacent to the street light 100. Lighting of 100) can be controlled.

For example, when the amount of individual generated power of the street light 100 is less than or equal to a threshold value and the difference between the amount of generated power of the corresponding street light 100 and the generated power of the adjacent street light (s) is within a standard deviation, the distribution box controller 200 Judging from the dark weather (for example, cloudy weather), the corresponding street lamp 100 is controlled to be lit using AC power supplied from the commercial system 500 regardless of time.

If the amount of individual generated power of the street light 100 is less than or equal to a threshold value, and the difference between the amount of generated power of the corresponding street light 100 and the amount of generated power of the adjacent street light (s) is out of a standard deviation, the corresponding street light 100 Will be judged as a malfunction of the power generation function.

The distribution box controller 200 may be controlled by a manager or wireless communication (for example, CDMA), and may control the street lamps 100 through this.

In detail, the distribution box controller 200 may selectively perform individual control, group control, and integrated control on the target street lights 100 through the plurality of connected street light controllers 140.

For example, in the case of integrated control, the distribution box controller 200 collectively controls all the streetlight controllers 140 to apply the same daytime and nighttime criteria, thereby simultaneously lighting and simultaneously turning off all the streetlights 100. At this time, all of the street lights 100 are turned on for the same night time to receive power from the commercial system 500.

Alternatively, the distribution box controller 200 may individually apply the criteria of the day time and the night time for each street light 100 through individual control.

Alternatively, the distribution box controller 200 may group the target street lamps 100 into several groups through group control to set day and night times differently for each group. In this case, the range of the day / night and the time to turn on and off each group, and the basis of the power supplied from the commercial system 500 may be determined by the street lamp flashing schedule, the sunrise time and the sunset time by region.

In the conventional system having a storage battery in a street lamp to use solar light, when the charging voltage supplied to the battery of the street lamp or the DC-DC converter is determined to be an undervoltage, the AC power supplied from the outside is switched.

However, as described above, such a battery system has a certain limit in the initial cost, maintenance cost, storage power generation capacity, storage capacity, etc. required for the battery installation.

In order to overcome this limitation, one embodiment is obtained by the power generation device 120 installed for photovoltaic and wind power generation during the day when the street lamp 100 is turned off, instead of supplying external power by measuring the excess and insufficient voltage. The electric power is transmitted to the outside, and during the night when the street lamp 100 is turned on, a relatively cheap late night power is supplied to the street lamp 100.

That is, in one embodiment, when the storage battery can not be charged with solar energy, instead of the conventional method using a commercial power source, the electrical energy generated by the power generation device 120 is supplied to the commercial power source, regardless of whether the battery is charged at night Implements a method of lighting the street lamp 100 by using a commercial power supplied from the outside.

According to this configuration, by using the characteristics of the street lamp 100 which is turned off during the daytime can be supplied to the power generated mainly during the daytime power to commercial power to save energy, relatively at night when the street lamp 100 should be turned on Cheap midnight power is available. Therefore, it is very efficient in terms of power operation.

The structure of the grid-connected streetlight monitoring control system according to the present invention is not limited to the above-described embodiment, and may be variously modified and implemented within the range permitted by the technical idea of the present invention.

100: street light, 110: lamp,
120: power generation unit, 130: grid-connected inverter,
140: street light controller, 200: distribution box controller,
310: access node, 320: wireless internet gateway,
330: mobile phone, 400: control center,
410: control server, 420: control client terminal,
500: commercial system

Claims (8)

A power generation device installed in the street lamp to produce DC power through solar power generation;
A grid-connected inverter converting the DC power produced by the power generation device into AC power and transmitting the power to a commercial system;
A streetlight controller for lighting the streetlight by using an AC power supplied from a commercial system during a night time, and monitoring an amount of power generated by the streetlight and a short circuit; And
It includes a distribution box controller connected to the plurality of street light controllers to control whether each street light is turned on in accordance with the amount of power generated,
The distribution box controller selectively performs individual control, group control, and integrated control on the target street lights through a plurality of connected street light controllers.
The method of claim 1, wherein the street light controller,
Street light monitoring control system, characterized in that for determining the night time for lighting the street light on the basis of the street lamp flashing schedule, sunrise time and sunset time.
delete According to claim 1, wherein the distribution box controller,
When the individual power generation amount of the street light is less than the threshold value, judging as a dark weather, street light monitoring control system, characterized in that to control the street light is turned on using the AC power supplied from a commercial system irrespective of time.
According to claim 1, wherein the distribution box controller,
A streetlight supervisory control system characterized by tracking the failure of a power generation function through a difference between the amount of generated power of a street light and the amount of generated power of an adjacent street light adjacent to the street light.
According to claim 1, wherein the distribution box controller,
When the amount of generated power of the street light is less than a threshold value and the difference between the amount of generated power of the street light and the generated power of the adjacent street light adjacent to the street light is within a certain standard deviation, it is determined that the weather is dark and determined from a commercial system regardless of time. Street light supervisory control system, characterized in that for controlling the lighting so that the street light using the supplied AC power.
The method of claim 1,
Further comprising a control server wirelessly connected to the distribution box controller to control and monitor each street lamp from a remote location,
The distribution box controller connects to the control server through an access node of a wireless communication network,
The control server stores the basic information table matching the street light information and the manager information, and the operation state of each street light through the monitoring information including the amount of power generated by each street lamp provided by the distribution box controller, the amount of power used, a short circuit and whether it is lit. And individually monitoring, and wirelessly transmitting the monitoring result to a manager mobile phone of each street light using a wireless communication network.
According to claim 1, The power generation device,
Street light supervisory control system characterized by producing DC power by using solar energy and wind energy.

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