CN201639813U - An intelligent lighting control cabinet - Google Patents

Abstract

The utility model relates to an intelligent lighting control cabinet, which includes an auto-coupling control transformer plus a compensation transformer to realize voltage regulation and energy-saving operation. The intelligent lighting control cabinet adopts double doors and a stainless steel spray-painted cabinet body. The incoming line at the inner bottom is a three-phase four-wire system, the electrical control panel is inside the front door, and the intelligent lighting control module is inside the rear door; there are AC ammeter, AC voltmeter, indicator light and knob switch on the electrical control panel; the AC voltmeter displays The three-phase incoming line phase voltage and the AC voltmeter are used in conjunction with the "input voltmeter switching" and "output voltmeter switching" switches to display the input and output phase voltage values of the control cabinet respectively; the upper row of indicators are "A phase indication"","B-phaseindication","C-phaseindication", and the lower indicator lights are "intelligent operation", "bypass operation" and "energy-saving mode".

Description

An intelligent lighting control cabinet

technical field

The utility model relates to an intelligent lighting control cabinet, which belongs to the technical field of lighting control.

technical background

In recent years, with the rapid development of road lighting construction in my country, the energy consumption of street lamps has also increased significantly. Especially in recent years, energy prices have increased significantly, and power consumption has become a major burden for street lamp units. Therefore, in the case of growing road lighting facilities, it is absolutely necessary to strengthen the research and application of road lighting energy-saving technology, in order to slow down the rising trend of energy consumption, especially in the era when the world advocates green lighting, the energy saving of road lighting will inevitably become a trend .

At present, the lighting tools widely used in road lighting are gas discharge lamps. The power consumed by a gas discharge lamp is directly related to its input voltage. Take the high-pressure sodium lamp as an example, when the voltage is reduced by 10%, the current is reduced by 10%, the power is reduced by 25%, and the luminous flux is reduced by 30%.

In view of the fact that the design of road lighting is based on the need for normal illuminance, energy consumption should not be reduced by reducing illuminance. However, when the number of vehicles and pedestrians is greatly reduced in the second half of the night, the power supply voltage will increase due to the reduction in power load, so At this time, the purpose of energy saving is achieved by reducing the power supply voltage and appropriately reducing the luminous flux of the light source.

Contents of the invention

The purpose of this utility model is to provide an intelligent lighting control cabinet. The lighting control cabinet adopts double doors, uses a voltage transmitter to measure the voltage of each phase of the incoming line, and aims at the fluctuation range of the voltage and the corresponding control scheme stored in the PLC. A transformer with multiple taps is connected to the corresponding taps to achieve the purpose of changing the transformation ratio of the transformer, so that the output voltage is stabilized within the target range.

In order to achieve the above-mentioned purpose, the technical solution of the utility model is: the auto-coupling control transformer plus the compensating transformer can realize voltage regulation and energy-saving operation, and select different taps of the auto-coupling transformer according to the difference of the input voltage U _i To change the transformation ratio, the autotransformer can give the compensation transformer a corresponding primary voltage under the input voltage, so that the compensation transformer secondary can generate a voltage that can be changed in size and direction to achieve the purpose of voltage regulation. The intelligent lighting control cabinet adopts double doors, stainless steel spray-painted cabinet body, the bottom of the cabinet is a three-phase four-wire system; the electric control panel is inside the front door, and the intelligent lighting control module is inside the rear door; there is an AC ammeter on the electrical control panel, AC Voltmeter, indicator light and knob switch; among them, the AC voltmeter displays the phase voltage of the three-phase incoming line, and the AC voltmeter displays the input and output of the control cabinet through the cooperation with the "input voltmeter switching" and "output voltmeter switching" switches The voltage value of each phase; the upper indicator lights are "A phase indication", "B phase indication" and "C phase indication". The lower indicator lights are "intelligent operation", "bypass operation" and "energy saving mode".

The beneficial effect of the utility model is that when the system is in the intelligent operation mode or the light is turned on manually, the "intelligent operation" indicator light will be on; when the system is in the bypass operation mode, the "bypass operation" indicator light will be on; when the system When the energy-saving operating time is reached in the smart operation mode, the "energy-saving mode" indicator light will come on. The "input voltmeter switching" and "output voltmeter switching" switches are used to switch the input and output voltages of different phases indicated by the voltmeter; the "operating mode switching" switch is used to switch among three states: normal/exit/bypass , used to change whether the device is running in the smart running mode. The "Manual Lighting Control" switch is used to manually select the switching time of the lights in the smart operation mode.

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

Description of drawings

Fig. 1 is the utility model auto-coupling control transformer plus compensating transformer schematic diagram;

Fig. 2 is the wiring diagram of the electric circuit of the utility model.

Detailed ways

Referring to Fig. 1, this is a schematic diagram of the utility model auto-control transformer plus a compensating transformer.

As shown in the figure, the method of auto-transformer control transformer and compensating transformer can realize the function of voltage regulation and energy-saving operation.

According to the different input voltage U _i , different taps of the autotransformer are selected to change its transformation ratio, so that the autotransformer can give a corresponding primary voltage to the compensation transformer under the input voltage, so that the secondary of the compensation transformer can generate a size and direction The voltage can be changed to achieve the purpose of voltage regulation.

The compensation transformer of this scheme produces a complete sine wave compensation voltage with the same frequency and phase as or opposite to the input voltage, so the output voltage maintains the same sine wave without waveform distortion. When the tap of the control transformer is changed, there is no switching of the output voltage circuit, and a voltage amplitude based on the input voltage is always maintained, which meets the requirements of non-contact voltage regulation for the load.

The adjustable ratio of the compensation transformer increases the number of combinations of the ratios of the two transformers, which also makes it possible to reduce the number of taps of the control transformer. For the purpose of reducing the number of switches, the transformation ratio of the autotransformer is changed to 5 levels, and the transformation ratio of the compensation transformer is changed to 2 levels, and 8 kinds of transformation ratio combinations are formed according to the needs.

With reference to Fig. 2, this is the electric circuit connection diagram of the present utility model.

As shown in the figure, the control of the taps of the transformer and the switch control of each lamp circuit adopt the relay mode. Single-phase voltage transformers are used for voltage acquisition. If the visualization function of voltage is considered, single-phase voltmeters with voltage output functions are used, and the output voltage is 0-10V. In order to prevent the short-term peak voltage from causing frequent jitter of the tap relay, the sampling voltage glitch is removed by means of capacitor filtering.

When changing the transformation ratio combination of the transformer, it is necessary to change the two transformation ratios of the control transformer and the compensation transformer at the same time. In addition to controlling the sequence of the transformation ratio changes of the two places in the PLC program, the corresponding protection circuit is also designed in the peripheral circuit. To prevent the danger of the voltage being too high or too low caused by the instantaneous transformation ratio scheme leapfrogging. There is a hardware interlock relationship between the taps of each transformer to ensure that there is one and only one tap to input the external voltage to prevent the short circuit of the transformer.

The energy-saving mode of the system is divided into: soft energy-saving mode and hard energy-saving mode.

The soft energy-saving mode is: when the system reaches 22:00 in the intelligent lighting mode, it will automatically switch to the energy-saving lighting control mode. This mode takes the minimum voltage required for high-pressure mercury lamp lighting as the standard, and keeps the lighting supply voltage between 190V and 215V. Through this mode, the lighting fixture avoids the waste of electric energy caused by the high voltage at night, and achieves the purpose of energy saving through step-down power supply while ensuring the illumination requirements of the lighting fixture, and prolongs the service life of the lighting fixture.

The hard energy-saving mode is: when the system reaches 24:00 in the intelligent lighting mode, the system will turn off 1/3 of the lamps on each lighting group, and then turn off 1/3 of the lamps when it reaches 2:00. The number of lamps achieves the purpose of energy saving.

When the system is in the intelligent operation mode or the light is turned on manually, the "intelligent operation" indicator light will be on; when the system is in the bypass operation mode, the "bypass operation" indicator light will be on; When the time is running, the "Energy Saver Mode" light will come on. The "input voltmeter switching" and "output voltmeter switching" switches are used to switch the input and output voltages of different phases indicated by the voltmeter; the "operating mode switching" switch is used to switch among three states: normal/exit/bypass , used to change whether the device is running in the smart running mode. The "Manual Lighting Control" switch is used to manually select the switching time of the lights in the smart operation mode.

When the system uses the same transformer ratio, the response time from input voltage change to output voltage adjustment is 300ms, and the input voltage change between different transformer ratio schemes is set to a delay time of 3s to prevent the delay between the schemes. frequent switching.

According to the requirements of system flexibility, the system has a bypass control function, which can turn on the lights through the bypass switch at any time when needed.

The system input is a line voltage of 380V, a phase voltage of 220V, and a 50Hz power frequency AC power supply, using a three-phase four-wire system. The fluctuation range is between -5% and +25% of the rated voltage. The system output is four groups of 12 channels of 220V, 50Hz single-phase alternating current, and the accuracy is ±2%.

The operating temperature of the system is -10~60°C.

In order to achieve the purpose of changing the transformation ratio of the transformer, so that the output voltage is stabilized within the target range.

Claims (5)

1. An intelligent lighting control cabinet, comprising a control cabinet, which is provided with a voltage transmitter, characterized in that: the intelligent lighting control cabinet also includes an auto-coupling control transformer and a compensating transformer in the control cabinet; an auto-coupling transformer Different taps are used to change the transformation ratio: the control cabinet mentioned above adopts double doors and a stainless steel spray-painted cabinet body. The bottom of the cabinet is a three-phase four-wire system. Module; there are AC ammeter, AC voltmeter, indicator light and knob switch on the electrical control panel; the AC voltmeter is used in conjunction with the "input voltmeter switching" and "output voltmeter switching" switches to display the input and output phases of the control cabinet respectively. Voltage value; the upper row of indicator lights and the lower row of indicator lights are the operating modes respectively. 2. The intelligent lighting control cabinet according to claim 1, characterized in that: said upper row of indicator lights are respectively "A phase indication", "B phase indication" and "C phase indication". 3. The intelligent lighting control cabinet according to claim 1, characterized in that: said lower row of indicator lights are respectively "intelligent operation", "bypass operation" and "energy-saving mode". 4. The intelligent lighting control cabinet according to claim 1, characterized in that: the "input voltmeter switching" and "output voltmeter switching" switches are used to switch the voltmeter to indicate the input and output voltages of different phases . 5. The intelligent lighting control cabinet as claimed in claim 1, characterized in that: said "operating mode switching" has three status switching: normal/exit/bypass, which is used to change whether the equipment operates in the intelligent operating mode.

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