KR19980019411A - Street lighting controller able to control power factor - Google Patents

Abstract

The present invention enables power saving control of the street lamp mechanism and collection of state data, power factor adjustment to enable bidirectional communication with the main controller of the remote street lamp control system, and to automatically compensate the power factor of the power line for driving the lamp of the lamp lamp. The present invention relates to a street light controller capable of compensating power line power factor of the street light fixture 100 based on the first transceiver unit 201 capable of bidirectional communication with the main controller 100 and the applied power factor control data. Outputting the power factor control data among the received control data based on the power factor adjustment unit 202 and the control data received from the main controller 100, and controlling the lighting / flashing of the street lamp, and outputting the power factor from the power factor adjustment unit 202. Microprocessor for controlling the transmission of the state and the street light state data received from the street lamp mechanism 300 to the main controller 100 203, a second transceiver 204 capable of bidirectional communication with the street lamp mechanism 300, and a power line connected to a plurality of the street lamp mechanisms by being turned on / off by lighting control of the microprocessor 203. Including a plurality of relay unit 205 to supply, it is possible to control the regular lamps, street lights of the street light, as well as the power saving control, and to reduce the power consumption, and to collect the state of the street lamp fixtures in the main controller, the cost of maintenance It is possible to reduce the power consumption and to automatically compensate and adjust the power factor of the power line to reduce the power loss and increase the effective utilization rate of the electric equipment.

Description

Street lighting controller able to control power factor

The present invention relates to a street lamp controller of a remote street lamp control system, and in particular, it is possible to control the power saving control and status data of the street lamp fixture, and bidirectional communication with the main controller of the remote street lamp control system using a wired or wireless communication means, The present invention relates to a street light controller capable of adjusting a power factor to automatically compensate a power factor of a power line for driving a lamp of a street lamp.

Looking at the development of street light system that illuminates the street, the first time, the local manager directly turns on / off the breaker, the street light controller detects the day and night illumination and lights up, and the street light controller is controlled by the program. It has been developed into a street light control system that can be remotely controlled by using one-way wired or wireless communication.

The configuration of the unidirectional communication street light control system generally controls the street light control system as shown in FIG. 1, and for this purpose, the main control unit 10 and the control signal of the main control unit 10 generated by including a control signal with an area code. If the included area code corresponds to a preset area code, a plurality of street light controllers 30 for controlling the assigned street light fixtures 50 and a unique number controlled by the street light controller 30 to illuminate the landscape are provided. It is composed of a plurality of street lamp mechanism 50 assigned to each.

Such a conventional street lamp control system can selectively control the lighting of the street lamp at a desired time from a long distance, which is the main controller 10 wirelessly transmits a control signal including the area code, and the street lamp controller ( 30 is performed by comparing whether the area code included in the control signal is the same as its area code and analyzing consecutive control data when the area code is the same and controlling the assigned street lamp mechanism 50.

However, although the street lamp controller of the conventional street lamp control system can control the street lamp mechanism remotely, it is not possible to remotely check the state of street lamps such as lamps, ballasts, and igniters of the street lamp mechanism, and also receives control signals from the main controller. Since the RF (Radio Frequency) receiving module is a crystal type, it is difficult to change the frequency band, so there is a problem that the crystal of the RF receiving module needs to be exchanged in order to use it as a street lamp controller in a different area. This had a problem of acting as a factor of the cost increase.

In addition, the power factor of the driving power line that occurs when there is a significant fluctuation in load, such as when using the energy-saving coil ballast and varying the power consumption from time to time, and when lighting the street lamp or security lamp in a distant manner. There have been problems such as an increase in power loss due to deterioration and a decrease in the effective utilization rate of electrical equipment.

Accordingly, a remote streetlight control system capable of bidirectional communication as shown in FIG. 2 has emerged, and a streetlight controller capable of adjusting power factor in the remote streetlight control system capable of bidirectional communication has been required.

In order to solve the above problems, the present invention can perform power-saving control and collection of state data of a street lamp at a remote location by two-way transmission and reception with a main controller of a remote street light control system using a wired or wireless communication means. An object of the present invention is to provide a street light controller capable of power factor correction to automatically compensate for a power factor drop in power lines caused by a variable load.

A street light controller capable of power factor correction according to the present invention is a street light controller that receives a control data transmitted from a main controller of a remote location and controls a plurality of assigned street lamp mechanisms, the first transceiver comprising two-way communication with the main controller; And a power factor adjusting unit for compensating and adjusting the power line power factor of the street lamp mechanism based on the applied power factor control data and outputting the power factor status, and controlling the lighting / flashing of the street lamp based on the control data received from the main controller. A microprocessor which outputs the power factor control data and transmits and controls the power factor state from the power factor adjusting unit and the street lamp state data received from the street lamp mechanism to the main controller, a second transmission / reception unit capable of bidirectional communication with the street lamp mechanism, On / off by lighting control and many Includes a plurality of relays to the street lamp mechanism supplying predetermined power is connected to the power lines will be characterized by a true.

In addition, the first transceiver is a RF (Radio Frequency) transceiver module capable of transmitting and receiving frequency band variable in a phase locked loop (PLL) method.

The first transceiver may further include a wired transmit / receive module.

The second transceiver may be a power line carrier communication module including a modulation and demodulation unit for modulating a signal to be transmitted into a power line communication signal and demodulating the received signal into a TTL level signal, and a line matching unit.

The microprocessor may further include a nonvolatile storage unit for storing and maintaining the control data for long-term street light control even in a non-powered state.

The apparatus may further include a monitoring unit configured to monitor a monitoring signal applied from the microprocessor at a predetermined period using an internal delay timer, and to initialize and automatically recover the microprocessor if the monitoring signal is not applied within the predetermined period.

In addition, in the case of using the energy-saving coil ballast for the street lamp, the microprocessor transmits the power saving signal to the street lamp through the second transceiver, if there is a power saving signal among the control data received from the first transceiver. The power saving control is further performed.

In addition, the power factor adjusting unit converts and outputs the current of the power line at a predetermined current ratio, a transformer for converting and outputting the voltage of the power line at a predetermined voltage ratio, and outputs a digital signal respectively. A / D converter that converts the output power to a power factor, calculates the difference between the current power factor and the target power factor based on the detected current and voltage signal and the applied power factor control data from the A / D converter. And a control unit for outputting a switching signal for selecting a gender capacitor array, and a predetermined number of capacitor banks, which are switched based on the switching signal of the control unit, so that the selected capacitor is connected in parallel to the streetlight mechanism of the power line to adjust the power factor of the power line. It characterized in that it comprises a capacitor array.

The apparatus may further include an integrated power unit for detecting the integrated power of the power line, further transmitting the integrated power state to the main controller.

The apparatus may further include a ground fault detection unit for detecting a ground fault of the power line, further transmitting the ground fault state to the main controller.

1 is a block diagram of a conventional exemplary unidirectional communication street light control system.

2 is a block diagram of a remote street light control system incorporating the present invention.

Figure 3 is a detailed block diagram of a streetlight controller capable of adjusting the power factor according to the present invention.

4 is a detailed block diagram of the power factor adjusting unit of FIG. 3.

Explanation of symbols for main parts of the drawings

100: main controller 200: street light controller

300: street light mechanism 201: first transceiver

202: power factor adjustment unit 202a: transformer unit

202b: current transformer 202c: A / D converter

202d: control unit 202e: capacitor arrangement unit

203: microprocessor 203a: nonvolatile storage

204: second transceiver 204a: variation demodulator

204b: line matching section 205: relay section

206: integrated power unit 207: monitoring unit

208: leakage detection unit 209: key input unit

210: display unit

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a detailed block diagram of a street light controller capable of adjusting the power factor according to the present invention. The first transceiver 201, the transformer 202a, the current transformer 202b, the A / D converter 202c, and the controller are shown in FIG. A power factor adjustment unit 202 including a 202d and a capacitor arrangement unit 202e, a microprocessor 203 including a nonvolatile storage unit 203a, a modulation / demodulation unit 204a, and a line matching unit 204b. The second transceiver 204, the relay unit 205 having a predetermined number of relays, the integrated power unit 206, the monitoring unit 207, the short circuit detecting unit 208, the key input unit 209 and the display unit 210 Include.

In this configuration, the first transceiver 201 is configured to enable bi-directional transmission and reception with the main controller 100 using an RF module that can easily transmit and receive frequency bands in a phase locked loop (PLL), or use a wired module. The controller 100 is configured to allow bi-directional transmission and reception with the main controller 100, modulates and transmits data from the microprocessor 203 to be described later, and demodulates the received data and outputs the demodulated data to the microprocessor 203.

In addition, the power factor adjusting unit 202 is a means for automatically compensating and adjusting the power factor of the power line to which the street lamp mechanism 300 is connected. As shown in FIG. 4, the power factor adjusting unit 202 is commonly referred to as a PT (Potential Transformer), and has a predetermined turns ratio (transformation ratio). Transformer 202a having a primary coil and a secondary coil having a ratio of an inverse ratio, and connecting the primary coil to both ends of the street lamp mechanism 300 connected to the power line 20, and detecting and outputting the transformed voltage induced in the secondary coil. And, commonly referred to as CT (Current Transformer), having a primary coil and a secondary coil having a predetermined winding ratio (inverse of the current ratio), connecting the power line to the primary coil, and detecting and outputting the current flow induced in the secondary coil. A / D converter 202c, which removes and amplifies noise components of the measured signals from current flow section 202b, current transformer 202b and transformer 202a, converts them into digital signals, and outputs them. D conversion The current power factor and target power factor based on the detected current and voltage signals from 202c and the power factor control data (eg, current ratio, transformer ratio, number of capacitor banks, and capacitor individual capacitance) applied from the microprocessor 203. A control unit 202d for outputting a switching signal for selecting a capacitive capacitor array corresponding to the difference by calculating a difference of?, And having a predetermined number of capacitor banks and switched based on a switching signal of the control unit 202d. The capacitor includes a capacitor array 202e connected in parallel to the street light fixture of the power line to adjust the power factor of the power line.

On the other hand, the microprocessor 203 controls the lighting / flashing of the street lamp based on the control data received from the main controller 100 through the first transceiver 201 and the power factor control data (for example, , Current ratio, transformer ratio, number of capacitor banks, and capacitor capacitors) are outputted to the control unit 202d of the power factor adjusting unit 202, and the power factor state from the control unit 202d and the lamp unit 300 described later are described. 2 transmits and controls the streetlight state data received through the transceiver unit 204 to the main controller 100 through the first transceiver unit 201.

In addition, the microprocessor 203 includes a nonvolatile storage unit 203a for storing the received control data, and the nonvolatile storage unit 203a is capable of storing and storing data stored without power. It is configured using Read Only Memory, NVSRAM (None Volatile Static Random Access Memory), or Flash Memory.

In addition, the microprocessor 203 transmits the power saving signal to the second transmission / reception unit when there is a power saving signal among the control data received by the first transmission / reception unit 201 when the power saving type coil ballast (not shown) is used for the street lamp mechanism 300. Transmission to the street lamp mechanism 300 through 204 performs the power saving control to the variable load of the energy-saving coil ballast.

Meanwhile, the second transceiver 204 is a means for bidirectional power line communication with the street lamp mechanism 300. The second transceiver 204 modulates a signal to be transmitted from the microprocessor 203 into a power line communication signal and demodulates the received signal into a signal having a TTL level. And a line demodulation section 204a and a line matching section 204b for line matching with the power line.

The relay unit 205 is turned on / off by the lighting control of the microprocessor 203 and selectively supplies a predetermined power source (single phase AC power source) to a power line to which a plurality of street lamp mechanisms 300 are connected.

In addition, the integrated power unit 206 detects the integrated power of the power line and outputs the integrated power to the microprocessor 203.

On the other hand, the watchdog 207 monitors a monitoring signal applied from the microprocessor 203 in a predetermined cycle with an internal delay timer (not shown), and initializes the microprocessor 203 if the monitoring signal is not applied within the predetermined cycle. To recover automatically.

Then, the ground fault detecting unit 208 detects a ground fault of the power line and outputs it to the microprocessor 203.

Meanwhile, the key input unit 209 sets an area code assigned to the street light controller 200, resets the power factor control data, or changes the street light state (for example, lamp, ballast, igniter state, short circuit state, power factor state, and integrated power state). And a predetermined key for confirming), and outputs a key signal corresponding to the key input of the administrator.

When the key signal for setting the area code or checking the street light condition is applied to the microprocessor 203, the display unit 210 controls the area code or power factor control data based on the control of the microprocessor 203. B Display the streetlight status.

Next, the operation of the power factor controller capable of adjusting the power factor according to the present invention having the above-described configuration will be described in detail.

First, the street light controller 200 receives various control data of the main controller 100 and analyzes and processes the received control data to perform a function required by the main controller 100.

Referring to the operation of the street light controller 200, the control unit receives various control data from the main control unit 100 through the first transceiver unit 201 and the power line to the individual street light fixture 300 as well as the constant light, the differential control of the street light. Power saving control data is transmitted through the second transmission / reception unit 204, which is a carrier communication means, so that power saving control that maintains the minimum illuminance that does not inconvenience traffic in the late-night time zone where there is little traffic of a person or a vehicle is possible. In addition, the streetlight state data detected by the luminaire state monitoring means (not shown) installed in each streetlight mechanism 300 is collected through the second transceiver 204 to provide a ballast, an ignitor, a lamp, and a short circuit for the streetlight. The state can be confirmed through the display unit 210 and can be transmitted to the main controller 100 of the remote place through the first transceiver unit 201, and due to the differential and constant light control and power saving control of the street light fixture 300 The power factor drop of the power line according to the load variation may be improved through the power factor controller 202.

First, a description will be given of the constant light, the flashing lights and the power saving control operation of the street light.

When the main controller 100 transmits the control lamp of the street lamp, the flashing lights and the power saving control data using the area code or the unique number as a header, the main controller 100 receives the control data through the first transceiver 201 and then receives the TTL. The data signal is demodulated at a level and output to the microprocessor 203.

Then, the microprocessor 203 compares whether the header of the received control data matches the set area code or unique number, and if so, analyzes the control data and stores the control data in the nonvolatile storage unit 203a. In this case, the nonvolatile storage unit 203a may store data on a constant light on / off time, a hard on / off time, a power saving on / off time, and the like.

Subsequently, the microprocessor 203 reads the current time from the real time clock (not shown), and always turns on / off the time of the street lamp, the sharp on / off time, and the power saving on / off of the street light stored in the nonvolatile storage unit 203a. Compare with the time data, if there is a match, perform the corresponding control function.

That is, when the current time coincides with the constant light on / off time of the street lamp, the microprocessor 203 drives all the relays of the relay unit 205 to control the constant light on / off and power lines to all the street lamp mechanisms 300. Apply a predetermined AC power through the.

In addition, when the current time coincides with the on / off time of the street lamp, the microprocessor 203 drives on some relays of the relay unit 205 to control the on / off of the street lamp, through the power line to some street lamp mechanism 300. Apply a predetermined AC power.

At this time, the constant light and the differential control state can be displayed through the display unit 210 so that it can be confirmed from the outside.

If the current time coincides with the power saving on / off time, the microprocessor 203 transmits power saving control data to the street lamp mechanism 300 through the second transceiver 204 to perform the power saving control function. In detail, the power saving control data output from the microprocessor 203 is modulated by the power demodulation unit 204a of the second transceiver 204 into a power line communication signal, and the modulated signal is transmitted to the power line via the line matching unit 204b. It is carried to each streetlight mechanism 300.

On the contrary, the transmitted signal is demodulated as an original signal from the line matching unit and the modulation / demodulation unit (not shown) of the street lamp apparatus 300 and applied to the controller. The controller switches the output stage of the energy-saving coil ballast to reduce the power consumption of the lamp. .

On the other hand, if the control data received from the main control unit 100 through the first transceiver 201 is a standard time correction signal, the microprocessor 203 is a time data (year / month / day / hour / minute of the real time clock) / Second) to the received standard time. Standard time correction is applied to all street light controllers 200 regardless of area code and unique number.

In addition, if the header of the received control signal coincides with the area code or the unique number, and the following data is parameter setting data for street light control, it is analyzed and stored in the nonvolatile storage unit 203a.

At this time, the stored latitude, longitude, standard longitude data for controlling the own street light when the communication with the main control device 100 is stored.

Next, the state data collection operation of the street lamp will be described.

First, upon request from the main control device 100 or the key input unit 209, the microprocessor 203 sends the state data collection request signal to the second transceiver unit 204 using the unique number of the street lamp mechanism 300 as a header. When output, the street lamp mechanism 300 analyzes the header of the received signal, and compares it with its own unique number and outputs the collected ballast coil, igniter, and lamp status to the second transceiver 204.

Then, the microprocessor 203 receiving the state data through the modulation / demodulation unit 204a of the second transceiver 204 transmits the state data to the main controller 100 through the first transceiver 201 or displays the display unit ( Display control through 210.

Next, an automatic power factor adjustment operation of the power line will be described.

First, the line voltage and the current flowing through the line through the current transformer 202b and the transformer 202a of the power factor adjusting unit 202 are converted into digital data signals through the A / D converter 202c, and then the control unit 202d. ) Is entered.

Then, the control unit 202d inputs from the A / D conversion unit 202c based on the power factor control data (for example, current ratio, transformer ratio, number of capacitor banks, and capacitor individual capacitance) applied from the microprocessor 203. The voltage, current, and reactive power are calculated based on the calculated voltage and current values, and the power factor is calculated based on the resultant data, and then the switching signal is transferred through the I / O port. , The capacitance value is adjusted so that the power factor is 98% or more by variably controlling the total capacitance value of the capacitor (eg, C1 to C8) selected by applying to SW1 to SW8, that is, connected to the street lamp mechanism 300 in parallel. The power factor is applied to the microprocessor 203.

Then, the power factor state is displayed on the display unit 210 or transmitted to the main controller 100 so that the administrator can conveniently check the power factor state.

In the above power factor adjustment, the power factor varies according to the increase or decrease of the inductive load due to the swelling, constant lighting, and power saving control of the street lamp mechanism 300, so that the line voltage and current are continuously measured to calculate the feedback and control the capacitance value. Control is possible.

In addition, the street lamp controller 200 of the present invention includes an integrated power unit 206 and a short circuit detecting unit 208 to display the integrated power state and the short circuit state through the display unit 210 or to transmit the remote control to the main controller 100. Confirmation management is possible.

In addition, in addition to remote control by the main controller 100, if remote control is not possible due to a communication failure, the control data (latitude, longitude, standard longitude data) previously stored in the nonvolatile storage unit 203a is used. Switching to the control mode can control the streetlight mechanism 300.

This function reads the streetlight control data transmission time interval data transmitted from the main controller 100 by the microprocessor 203 from the nonvolatile storage unit 203a. If the elapsed time is automatically switched to the self control mode, the self control mode is maintained until the control data is received from the main controller 100.

In addition, the street lamp controller 200 according to the present invention has an abnormality detection and automatic recovery function, the microprocessor 203 periodically outputs a monitoring signal to the monitoring unit 207 while executing each routine of the program. The monitoring unit 207 has a delay timer therein, and the delay timer is restarted every time a monitoring signal is output from the microprocessor 203, and the monitoring signal is not input from the microprocessor 203 within a set time. If the delay timer is set (abnormal state), the reset signal is output to the microprocessor 203.

Then, the microprocessor 203 is initialized by the reset signal of the monitoring unit 207 and automatically recovered from the abnormal state.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

As described above, the street lamp controller of the present invention can reduce power consumption since it is possible to control power savings as well as regular lamps and slit lamps of the street lamps, and can collect state data of individual street lamps from the main controller of a remote site. Reduce the cost of maintenance.

In addition, the power factor of the power line of the street lamp mechanism is automatically compensated and adjusted to reduce the power loss and increase the effective utilization rate of the electrical equipment.

Claims (10)

In the streetlight controller for receiving a control data transmitted from the remote control device 100 to control a plurality of assigned streetlight mechanism 300, A first transceiver 201 capable of bidirectional communication with the main controller 100; A power factor adjustment unit (202) for compensating and adjusting the power line power factor of the street lamp device (100) based on the applied power factor control data and outputting a power factor state; It controls the lighting / flashing of the street lamp based on the control data received from the main controller 100, and outputs the power factor control data among the received control data, and the power factor state from the power factor adjusting unit 202 and the street lamp mechanism ( A microprocessor (203) for transmitting and controlling the streetlight state data received from the main controller (100); A second transceiver 204 capable of bidirectional communication with the street lamp mechanism 300; A power factor controller capable of adjusting the power factor including a plurality of relay units (205) on / off by the lighting control of the microprocessor (203) to supply predetermined power to a power line to which the plurality of lamp units are connected. The streetlight controller of claim 1, wherein the first transceiver unit (201) is a radio frequency (RF) transceiver module capable of transmitting and receiving frequency bands in a phase locked loop (PLL) manner. The street light controller of claim 2, wherein the first transceiver unit 201 further includes a wired transceiver module. 2. The apparatus of claim 1, wherein the second transceiver 204 modulates a signal to be transmitted into a power line communication signal and modulates and demodulates the received signal into a TTL level signal and a line matcher 204b. Power factor adjustable streetlight controller, characterized in that the power line carrier communication module comprising. 5. The power factor according to any one of claims 1 to 4, wherein the microprocessor 203 further includes a nonvolatile storage unit 203a for storing and maintaining the control data for long-term street light control even in a non-powered state. Adjustable street light controller. The microprocessor 203 according to any one of claims 1 to 4, wherein a supervisory signal applied from the microprocessor 203 in a predetermined period is monitored by an internal delay timer, and if the supervisory signal is not applied within a predetermined period, the microprocessor 203 is initialized. The power factor adjustment street light controller, characterized in that it further comprises a monitoring unit 207 to automatically recover. The power saving signal of any one of claims 1 to 4, wherein the microprocessor (203) uses a power saving coil type ballast for the street lamp mechanism (300). And a power saving signal is transmitted to the street lamp mechanism 300 through the second transceiver 204 to perform power saving control by varying the load of the power saving coil type ballast. The power factor adjusting unit 202 of claim 1 or 4, wherein the power factor adjusting unit 202 converts the current of the power line to a predetermined current ratio and outputs the current, and a transformer for converting the voltage of the power line to a predetermined voltage ratio and outputs the current. 202a, an A / D converter 202c for converting the measured signals from the transformer 202a and the current transformer 202b into digital signals and outputting the digital signals, respectively, and from the A / D converter 202c. A control unit 202d for calculating a difference between a current power factor and a target power factor based on the detected current and voltage signals and the applied power factor control data, and outputting a switching signal for selecting a capacitive capacitor array corresponding to the difference; And a capacitor array having a predetermined number of capacitor banks and switched based on a switching signal of the controller 202d so that a selected capacitor is connected in parallel to the street lamp mechanism 300 of a power line to adjust the power factor of the power line. Power factor adjustment is available street lamp controller comprising a (202e). 5. The power factor adjustment according to any one of claims 1 to 4, further comprising an integrated power unit 206 for detecting an integrated power of a power line, further transmitting an integrated power state to the main controller 100. Street light controller available. The streetlight controller according to any one of claims 1 to 4, further comprising a ground fault detector 208 for detecting a ground fault of a power line, further transmitting a ground fault state to the main controller 100. .