CN213027526U - Different source alternating current on-line cutting device - Google Patents
Different source alternating current on-line cutting device Download PDFInfo
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- CN213027526U CN213027526U CN202021440605.XU CN202021440605U CN213027526U CN 213027526 U CN213027526 U CN 213027526U CN 202021440605 U CN202021440605 U CN 202021440605U CN 213027526 U CN213027526 U CN 213027526U
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- 238000005520 cutting process Methods 0.000 title description 67
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- 238000012544 monitoring process Methods 0.000 claims description 42
- 238000001514 detection method Methods 0.000 claims description 32
- 238000009826 distribution Methods 0.000 claims description 30
- 238000005070 sampling Methods 0.000 claims description 13
- 238000012545 processing Methods 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 18
- 238000010079 rubber tapping Methods 0.000 description 11
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Abstract
本实用新型实施例涉及供电设备割接技术领域，公开了一种不同源交流电在线割接装置，包括柜体、割接电路、设置于柜体上并分别与割接电路连接的显示屏、合闸按钮、分闸按钮、第一四相输入端子、第二四相输入端子及第一四相输出端子；第一四相输入端子接收第一交流电源设备的第一输入信息；第二四相输入端子接收第二交流电源设备的第二输入信息；第一四相输出端子与用电设备连接；割接电路设置于柜体内，根据第一输入信息及第二输入信息使第二交流电源设备与第一交流电源设备同步，并在合闸按钮被触发时控制第二四相输入端子与第一四相输出端子导通，实现第一交流电源设备与第二交流电源设备割接。本实用新型实现了交流电源不间断割接的有益效果。
The embodiment of the utility model relates to the technical field of power supply equipment cutover, and discloses an on-line cutover device for alternating current from different sources, which includes a cabinet body, a cutover circuit, a display screen arranged on the cabinet body and connected to the cutover circuit respectively, and a closed circuit. The gate button, the opening button, the first four-phase input terminal, the second four-phase input terminal and the first four-phase output terminal; the first four-phase input terminal receives the first input information of the first AC power supply device; the second four-phase input terminal The input terminal receives the second input information of the second AC power supply equipment; the first four-phase output terminal is connected to the electrical equipment; the cutover circuit is arranged in the cabinet, and the second AC power supply equipment is made according to the first input information and the second input information. It is synchronized with the first AC power supply equipment, and controls the second four-phase input terminal to conduct conduction with the first four-phase output terminal when the closing button is triggered, so as to realize the cutover of the first AC power supply equipment and the second AC power supply equipment. The utility model realizes the beneficial effect of uninterrupted cutover of the AC power supply.
Description
Technical Field
The embodiment of the utility model provides a relate to power supply unit cuts over technical field, concretely relates to different source alternating currents cut over device on line.
Background
At present, a large number of alternating current electric equipment are installed in a data center and a telecommunication operator machine room, 7 × 24 hours of uninterrupted power supply is required, a large number of uninterrupted power supply equipment are installed at the upstream of the equipment, and uninterrupted on-line cutting is required when the uninterrupted power supply equipment is replaced and the load of alternating current power distribution equipment is transferred. The sine alternating current has three elements of amplitude, angular frequency and initial phase angle, and the three elements of the power supply before and after the cutting are consistent with each other, so that the cutting difficulty is high and the risk is high.
The technical premise of the alternating current uninterruptible power cut-over technology is that the cut-over is performed in the same source mode, namely, the power supply equipment before and after the cut-over is the same power supply, all UPS equipment needs to be set in a bypass power supply mode, but a large data center and a core building are provided with multiple paths of commercial power input, and multiple transformers are configured. A large number of cutting scenes cannot guarantee the same power supply, a small number of cutting scenes can achieve the same power supply, however, uninterrupted power supply equipment is set to be in a bypass mode during cutting, backup protection of a storage battery is lost, and once the mains supply is interrupted in the cutting process, downtime of electric equipment is directly caused. In a cutting-over scene under different source conditions, cutting-over must be carried out in a power-off mode at present, service equipment needs planned power failure, and the production and maintenance requirements of a current large-scale data center and a core building cannot be met. Therefore, an alternating current online cutting device with wide adaptability and high safety level is urgently needed.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, the embodiment of the utility model provides a different source alternating currents cut over device on line for the technical problem who does not support the alternating current source to cut over that exists among the solution prior art.
According to the embodiment of the utility model, the utility model provides a different source alternating current cut-over device on line is provided, the device includes the cabinet body, is used for showing the display screen of the state of cutting over, combined floodgate button, separating brake button, first four-phase input terminal, second four-phase input terminal, first four-phase output terminal and cuts over the circuit;
the display screen, the closing button, the opening button, the first four-phase input terminal, the second four-phase input terminal and the first four-phase output terminal are all arranged on the cabinet body and are respectively and electrically connected with the cutting circuit;
the first four-phase input terminal is connected with first alternating current power supply equipment which supplies power to the electric equipment through the power distribution cabinet through a first incoming cable and is used for receiving first input information of the first alternating current power supply equipment;
the second four-phase input terminal is connected with second alternating-current power supply equipment through a second incoming cable and used for receiving second input information of the second alternating-current power supply equipment;
the first four-phase output terminal is connected with the electric equipment through an outgoing cable and a power distribution cabinet;
the cutting circuit is arranged in the cabinet body and used for receiving the first input information and the second input information sent by the first four-phase input terminal and the second four-phase input terminal, enabling the second alternating-current power supply equipment to be synchronous with the first alternating-current power supply equipment according to the first input information and the second input information, and controlling the conduction of the second four-phase input terminal and the first four-phase output terminal when the closing button is triggered so as to realize the cutting of the first alternating-current power supply equipment and the second alternating-current power supply equipment.
In an alternative form, the severing circuit includes:
an input detection unit for detecting first input information of a first alternating-current power supply device and second input information of a second alternating-current power supply device;
the monitoring unit is used for sending a synchronous control signal to the load synchronization unit when the second alternating current power supply equipment is asynchronous with the first alternating current power supply equipment; the second alternating current power supply equipment is used for receiving a switching-on trigger signal and sending a switching-on command to the output control unit when the second alternating current power supply equipment is determined to be synchronous with the first alternating current power supply equipment;
the load synchronization unit is used for receiving the synchronization control signal of the monitoring unit, and processing second input information of the second alternating-current power supply equipment according to the synchronization control signal and first input information of the first alternating-current power supply equipment to obtain first output information of the second alternating-current power supply equipment which is synchronous with the first alternating-current power supply equipment;
and the output control unit is used for receiving the switching-on command sent by the monitoring unit and controlling the on-line cutting device of the alternating current of different sources to be conducted with the electric equipment so as to enable the second alternating current power supply equipment to supply power to the electric equipment by the first output information.
In an optional manner, the cutover circuit further includes:
and the output detection unit is used for detecting first output information and first input information which are output after the load synchronization unit carries out synchronous processing, and determining whether the second alternating current power supply equipment and the first alternating current power supply equipment are synchronous or not according to the first output information and the first input information.
In an optional manner, the cutover circuit further includes:
the sampling tracking unit is used for detecting first input information of the first alternating current power supply device before the monitoring unit controls the on-line tapping device of the alternating current of different sources to be conducted with electric equipment, and sending the first input information to the monitoring unit; and the monitoring unit is also used for detecting whether the first alternating current power supply equipment and the second alternating current power supply equipment are synchronous or not after the monitoring unit controls the on-line cutting device of the alternating current of different sources to be conducted with the electric equipment.
In an optional manner, the output control unit includes an ac contactor and a closing switch, and the closing switch is connected to the closing button and the monitoring unit, respectively;
when the closing button is triggered, the closing switch is closed to generate a closing trigger signal, the monitoring unit receives the closing trigger signal and sends a closing command to the output control unit when the first alternating current power supply device and the second alternating current power supply device are determined to be synchronous; and after receiving a closing command, the output control unit controls the AC contactor to be closed, so that the second AC power supply device supplies power to the electric equipment by using the first output information.
In an optional mode, the cutting circuit comprises a first four-phase input switch, a second four-phase input switch and a first four-phase output breaker;
the display screen the combined floodgate button the separating brake button first four-phase input terminal the second four-phase input terminal reaches first four-phase output terminal all sets up on the cabinet body, and respectively with cut and connect the circuit electricity and connect, further include:
the first four-phase input terminal is connected with the first four-phase input switch of the cutting circuit, the second four-phase input terminal is connected with the second four-phase input switch, and the first four-phase output terminal is connected with the first four-phase output breaker of the cutting circuit.
In an alternative form, the monitoring unit includes:
the synchronous circuit control unit is used for receiving first input information of the first alternating current power supply equipment and second input information of the second alternating current power supply equipment, and controlling the load synchronization unit to synchronize the second alternating current power supply equipment according to the first alternating current power supply equipment when the first input information and the second input information are determined to be asynchronous;
and the sampling signal receiving unit is used for receiving the first input information of the first alternating current power supply equipment sent by the sampling tracking unit.
In an optional mode, the monitoring unit is a PIC16F73 single chip microcomputer;
the PIC16F73 singlechip comprises an A/D conversion pin, a clock circuit, a first capture function pin and a second capture function pin.
In an optional manner, the apparatus further comprises: the emergency shutdown button and the loudspeaker are arranged on the cabinet body, and the heat dissipation grooves are arranged on two sides of the cabinet body;
the emergency stop button is connected with an emergency stop switch of the cut-over circuit, and the emergency stop switch is connected with the first four-phase input terminal.
In an optional mode, the device further comprises an alarm indicator light and a normal operation indicator light, and the cutting circuit further comprises an alarm unit connected with the output detection unit;
the alarm indicator lamp is connected with the alarm unit;
the output detection unit sends alarm information to the alarm unit when detecting that the first alternating current power supply equipment and the second alternating current power supply equipment are asynchronous;
and the alarm unit receives the alarm information and controls the alarm indicator lamp to give an alarm prompt.
The embodiment of the utility model provides a through setting up at the cutover device to set up power output synchronizing circuit in this cutover device, carry out voltage, frequency, harmonic content and phase adjustment to second alternating current power supply equipment, so that second alternating current power supply equipment exports with first alternating current power supply equipment synchronous parallelly connected back, has realized not cutting off the power supply on line.
Further, the embodiment of the utility model provides a need not to set up uninterrupted power source equipment into the bypass mode, cut over even the commercial power input trouble still can keep uninterrupted power supply among the in-process, cut over risk greatly reduced.
Further, the embodiment of the utility model provides a protection circuit real-time supervision cuts two way mains voltage of activestandby, frequency, phase sequence, harmonic, synchronous reference signal of in-process activestandby, reports an emergency and asks for help or increased vigilance to unusual, has further improved the security of cutting the in-process.
The foregoing is only an overview of the embodiments of the present invention, and in order to make the technical means of the embodiments of the present invention more clearly understood, the embodiments of the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features and advantages of the embodiments of the present invention more obvious and understandable, the following detailed description of the embodiments of the present invention is given.
Drawings
The drawings are only for purposes of illustrating embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic diagram illustrating an external structure of an on-line ac tapping device with different power supplies according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of an on-line ac tapping device with different power supplies according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a cutting process of the on-line cutting device for alternating current with different power sources according to an embodiment of the present invention;
fig. 4 shows a schematic diagram of a cutting process of an on-line cutting device for alternating current with different power sources according to another embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein.
Please refer to fig. 1 and fig. 2. Fig. 1 shows an external structure diagram of an on-line ac cutover device 100 according to an embodiment of the present invention. The different-source alternating current online cutting device has the following functions: in the case of uninterruptible power supply, the first ac power supply apparatus 300 that supplies power to the electric device 500 is replaced with the second ac power supply apparatus 200, so that the second ac power supply apparatus 200 supplies power to the electric device 500 using a power supply synchronized with the first ac power supply apparatus 300.
In the embodiment of the present invention, the different power sources ac on-line cutting device 100 includes an external structure portion and a circuit structure portion. Referring to fig. 1, the external structure of the device 100 includes a cabinet 1, a display screen 4 for displaying a cutting state, a closing button 5, an opening button 6, a first four-phase input terminal (not shown), a second four-phase input terminal 3, a first four-phase output terminal 12, and a cutting circuit (not shown). The on-line ac cutover device 100 further includes a first incoming cable (not shown) having an end connected to the first four-phase input terminal, a second incoming cable 2 having an end connected to the second four-phase input terminal 3, and an outgoing cable 13 having an end connected to the first four-phase output terminal 12. The first incoming cable and the second incoming cable 2 both include ac a/B/C/N four-phase incoming cables for obtaining four-phase inputs of the first ac power supply apparatus 300 and the second ac power supply apparatus 200, and the outgoing cable 13 includes an a/B/C/N four-phase outgoing cable. Accordingly, the first four-phase input terminal and the second four-phase input terminal 3 each include an a/B/C/N four-phase input terminal, and the first four-phase output terminal 12 includes an a/B/C/N four-phase output terminal.
Referring to fig. 1 and 2, the display screen 4, the closing button 5, the opening button 6, the first four-phase input terminal, the second four-phase input terminal 3, and the first four-phase output terminal 12 are disposed on the cabinet 1 and electrically connected to the cutting circuit, respectively. Specifically, the first four-phase input terminal is connected to a first four-phase input switch of the cut-over circuit, the second four-phase input terminal 3 is connected to a second four-phase input switch of the cut-over circuit, and the first four-phase output terminal 12 is connected to a first four-phase output breaker of the cut-over circuit. The closing button 5 is connected with a closing switch of the cutting circuit, and the opening button 6 is connected with an opening switch of the cutting circuit.
The first four-phase input terminal is connected to the first switch output terminal of the first ac power supply apparatus 300 through the first incoming cable, the first ac power supply apparatus 300 includes a first output breaker connected to the first switch output terminal, and the first four-phase input terminal is configured to receive first input information of the first ac power supply apparatus 300. The first ac power supply device 300 is a main power supply for supplying power to the electric devices through the power distribution cabinet.
The second four-phase input terminal 3 is connected to a second switch output terminal of the second ac power supply apparatus 200 through the second incoming cable 2, and the second ac power supply apparatus 200 includes a second output breaker connected to the second switch output terminal, and is configured to receive second input information of the second ac power supply apparatus 200. The second ac power supply apparatus 200 is a backup power supply for supplying power to the electric device through the power distribution cabinet when the first ac power supply apparatus 300 needs to be replaced. The first four-phase output terminal 12 is connected with the electric equipment through an outgoing cable 13 and a power distribution cabinet.
The cutting circuit is arranged in the cabinet body 1 and is configured to receive first input information and second input information sent by the first four-phase input terminal and the second four-phase input terminal 3, synchronize the second ac power supply apparatus 200 with the first ac power supply apparatus 300 according to the first input information and the second input information, and control conduction of the second four-phase input terminal 3 and the first four-phase output terminal 12 when the closing button 5 is triggered, so as to realize cutting of the first ac power supply apparatus and the second ac power supply apparatus.
Referring to fig. 2, the structure of the cutting circuit will be described in detail. Fig. 2 shows a block diagram of a cutting circuit of an embodiment of the on-line cutting device 100 for different ac sources according to the present invention. Referring to fig. 1 and fig. 2, in an embodiment of the present invention, an internal circuit structure of an online ac cutover device for different power supplies includes:
the input detection unit 110 is configured to detect first input information of a first ac power supply device 300 and second input information of a second ac power supply device 200, where the first ac power supply device 300 and the second ac power supply device 200 are both ac power supplies.
The second output breaker of the first ac power supply apparatus 300 is connected to the first four-phase input switch of the cut-over circuit through the second switch output terminal, the first incoming cable, and the first four-phase input terminal. When the second output breaker and the first four-phase input switch are both closed, the circuit where the first four-phase input terminal is located is turned on, and the input detection unit 100 detects an input from the first four-phase input terminal, thereby acquiring first input information of the first ac power supply apparatus 200.
The third output breaker of the second ac power supply apparatus 200 is connected to the second four-phase input switch of the cut-over circuit through the third switch output terminal, the second incoming cable 2, and the second four-phase input terminal 3, after the third output breaker and the first input switch are closed, the circuit of the second four-phase input terminal 3 is turned on, and the input detection unit 100 detects the input from the second four-phase input terminal 3, thereby acquiring the second input information of the second ac power supply apparatus 200. In this embodiment, the second ac power supply 200 is also used as an input power supply of the different-source ac online cutting device 100 to supply power to the different-source ac online cutting device 100.
The first input information and the second input information comprise input voltage, input frequency, input phase sequence, input harmonic content and other information.
The embodiment of the present invention does not limit the specific circuit of the input detection unit 110, for example, in a specific implementation manner, the input detection unit 110 can detect the first ac power device 300 and the second ac power device 200 by two circuits, and each circuit can be connected by the zero crossing point detection circuit, the phase-locked loop circuit, the counter logic circuit, and the phase detection circuit, so as to realize the detection of the first input signal of the first ac power device 300 and the second input signal of the second ac power device 200. The input voltage, the input frequency, the input phase sequence and the input harmonic content of the first input signal and the second input signal are respectively detected. For another example, a resistor, a diode connected in parallel with the resistor, an opto-coupler module connected with the resistor and the diode, and a comparator may be respectively provided on four incoming lines of the four-phase current connected to the first ac power supply apparatus 300, so as to detect the phase sequence, the phase, and the voltage zero-crossing point of the first ac power supply apparatus 300. Four incoming lines of four-phase current connected with the second alternating current power supply device 200 are respectively provided with a resistor, a diode connected in parallel with the resistor, an optocoupler module connected with the resistor and the diode, and a comparator, so as to detect the zero crossing point of the phase sequence, the phase and the voltage of the second alternating current power supply device 200.
In an embodiment of the present invention, the input detection unit 110 may include a voltage sampling circuit, a frequency and phase detection circuit. The voltage sampling circuit is formed by connecting a transformer coil and a rectifier diode, and the voltages of the first ac power supply apparatus 300 and the second ac power supply apparatus 200 are detected. The frequency and phase detection circuit is realized by an amplifier and a triode. The first input information and the second input information are subjected to zero-crossing comparison through corresponding amplifiers respectively to generate square wave signals, so that frequency and phase information in the first input information and the second input information are obtained.
For another example, in an embodiment of the present invention, the input detection unit 110 is configured to connect the first ac power supply device 300 and the second ac power supply device 200 in parallel, so as to obtain the circulating current components of the first ac power supply device 300 and the second ac power supply device 200, respectively, and when there is a phase difference between the output voltages of the first ac power supply device 300 and the second ac power supply device 200, an active circulating current component is generated; when there is a difference in magnitude between the output voltages of the first ac power supply apparatus 300 and the second ac power supply apparatus 200, a reactive circulating current component is generated. The input detection unit 110 includes a current sampling circuit, a current sharing relay, and a transformer isolation circuit.
The embodiment of the utility model provides an in, cut and connect the circuit still includes warning unit (not shown in the figure), sets up the three threshold value grade of mains phase voltage in the warning unit, is 220V, 230V, 240V three grade respectively to be provided with voltage fluctuation upper and lower limit threshold value and report to the police, the power is reverse to report to the police, and harmonic content upper limit threshold value is reported to the police.
The alarm unit is respectively connected with the input detection unit 110, the display screen 4 and the alarm indicator lamp 9. Specifically, the alarm unit receives the first input information and the second input information detected by the input detection unit 110, performs alarm analysis on the first ac power supply device 300 and the second ac power supply device 200, respectively, obtains the voltage level, and displays the voltage level on the display screen 4, and at the same time, analyzes whether the voltage level exceeds the voltage fluctuation upper and lower line threshold, whether the input frequency fluctuation upper and lower limit percentage threshold is exceeded, whether the power supply is reversed, and whether the harmonic content exceeds the harmonic content upper and lower line threshold, and if so, performs alarm prompt through the alarm indicator lamp 9, and displays the current first input information and the current second output information on the display screen 4.
The monitoring unit 120 is configured to receive first input information of the first ac power supply device 300 and second input information of the second ac power supply device 200, determine whether the first ac power supply device 300 and the second ac power supply device 200 are synchronous according to the first input information and the second input information, and send a synchronization control signal to the load synchronization unit 130 when the second ac power supply device is asynchronous with the first ac power supply device 300. And is further configured to receive a closing trigger action, and send a closing signal to the output control unit 160 when it is determined that the second ac power supply apparatus 200 is synchronized with the first ac power supply apparatus 300. The monitoring unit 120 is connected to the input detection unit 110 and the load synchronization unit 130, respectively. Specifically, the monitoring unit receives the first input information of the first ac power supply apparatus 300 and the second input information of the second ac power supply apparatus 200 transmitted by the input detection unit 110, and calculates a voltage amplitude difference and a voltage phase difference between the first input information and the second input information, thereby determining whether the first ac power supply apparatus 300 and the second ac power supply apparatus 200 are synchronized. When it is judged that the first alternating current power supply apparatus 300 and the second alternating current power supply apparatus 200 are not synchronized, the monitoring unit 120 controls the load synchronization unit 130 to perform synchronization processing. In the embodiment of the present invention, the monitoring unit 120 includes a synchronous circuit controller, and the synchronous circuit controller receives the first input information of the first ac power supply device 300 and the second input information of the second ac power supply device 200, and determines that the first input information and the second input information are asynchronous, and then control the load synchronization unit 130 according to the first ac power supply device 300 synchronizes the second ac power supply device 200. The embodiment of the utility model provides a do not restrict the specific circuit of monitoring unit 120, can realize through singlechip or DSP treater. For example, in one embodiment, the single chip microcomputer MCU may be implemented by a PIC16F73 single chip microcomputer. Specifically, the PIC16F73 single chip microcomputer includes an a/D conversion pin, a clock circuit, a first capture function pin and a second capture function pin. The PIC16F73 single chip microcomputer receives the voltage information in the first input information and the second input information detected by the input detection unit 110 through the a/D conversion pin, converts the voltage information into a digital signal, and calculates to obtain a voltage amplitude difference. The first capture function pin and the second capture function pin inside the single chip respectively receive the frequency and phase information in the first input information and the second input information detected by the input detection unit 110, measure the cycle time of the first input information and the second input information, and generate an interrupt at a zero-crossing point jump signal. Thereby calculating the frequency difference and the phase difference in the first input information and the second input information. And sending a synchronization signal to the load synchronization unit 130 for synchronization through a synchronization control signal output end of the PIC16F73 singlechip.
A load synchronization unit 130, configured to receive the synchronization control signal of the monitoring unit 120, and process second input information of the second ac power supply apparatus 200 according to the synchronization control signal and the first input information of the first ac power supply apparatus 300 to obtain first output information of the second ac power supply apparatus 200 that is synchronized with the first ac power supply apparatus 300; the first output information comprises output voltage, output frequency, output phase sequence and output harmonic content. The embodiment of the present invention does not limit the specific circuit of the load synchronization unit 130, for example, in a specific implementation, the synchronization can be realized by an intelligent static switch circuit. For another example, in a specific embodiment, the load synchronization unit 130 may also be implemented by a load synchronization controller. After the load synchronization unit 130 completes synchronization of the second ac power supply apparatus 200 with respect to the first ac power supply apparatus 300, the obtained first output information of the second ac power supply apparatus 200 is sent to the monitoring unit 120. And transmits the synchronized first output information to the voltage stabilizing and phase-locked loop circuit of the second ac power supply apparatus 200. The voltage stabilization and phase-locked loop circuit of the second ac power supply apparatus 200 adjusts the output of the second ac power supply apparatus 200 according to the first output information, thereby synchronizing the output of the second ac power supply apparatus 200 with the output of the first ac power supply apparatus 300, that is, causing the second ac power supply apparatus 200 to output the first output information in accordance with the first input information.
The present invention does not limit the specific circuit structure of the load synchronization unit 130. In one possible embodiment, the load synchronization unit 130 and the monitoring unit 120 may use a chip, such as a PIC16F73 single chip, to send the synchronization signal to the second ac power supply apparatus 200 for phase-locked synchronization.
As another example, in one possible implementation, the monitoring unit 120 and the load synchronization unit 130 may be implemented by a genlock control circuit, which includes an AD-MC401 phase-locked loop chip. After the input detection unit 110 detects the first input information and the second input information, the first input information and the second input information are filtered by the filter circuit of the input detection unit 110, and then the first input information and the second input information are converted into digital signals by the zero-crossing comparison circuit, so that corresponding first square wave signals and second square wave signals are obtained. An ETU unit in the AD-MC401 respectively sets generation interruption aiming at a first square wave signal and a second square wave signal and then continues to capture new events, the ETU generates interruption when a rising edge is effective, and a register is adopted to determine whether the first square wave signal is interrupted or the second square wave signal is interrupted, so that the voltage, the frequency, the duty ratio and the phase difference of the first input signal and the second input signal are calculated. Thereby controlling the output of the second ac power supply 300 by the phase-locked loop circuit to achieve synchronization with the first ac power supply 200.
And an output control unit 160, configured to control the different-source ac online cutting device 100 to be conducted with an electrical device 500, so that the second ac power supply device 200 supplies power to the electrical device 500 according to the first output information.
The output control unit 160 includes an ac contactor and a closing switch. The utility model discloses different source alternating current cut-over device 100 still includes operating button 180 on line, and this operating button 180 includes closing button 5, separating brake button 6, emergency stop button 7. The closing button 5 is connected to a closing switch, and the closing switch is connected to the monitoring unit 120. In the embodiment of the present invention, the monitoring unit 120 is further connected to the display screen 4. Wherein, in case of emergency, the control unit 120 can control the different source alternating current on-line cutting device 100 to stop working by pressing the emergency stop button 7.
The monitoring unit 120 obtains first output information sent by the load synchronization unit 130; and at the same time, when it is determined that the second ac power supply apparatus 200 is synchronized with the first ac power supply apparatus 300 with the first input information, the synchronization state is displayed on the display screen 4. The operator presses the closing button 5 through the synchronized state of the display screen. When the closing button 5 is triggered, the closing switch is closed to generate a closing trigger signal, the monitoring unit 120 receives the closing trigger signal, determines whether the first ac power supply device 300 and the second ac power supply device 200 are synchronized, and sends a closing command to the output control unit 160 when it is determined that the second ac power supply device 200 and the first ac power supply device 300 are synchronized. After the output control unit 160 receives the closing command, the ac contactor is controlled to close, and the circuit between the second ac power supply device 200 and the power distributor 400 is turned on, so that the second ac power supply device 200 supplies power to the electric device 500 according to the first output information.
Wherein, the utility model discloses different source alternating current cut-over device 100 on line still includes sampling tracking unit 150 and is used for controlling at monitoring unit 120 different source alternating current cut-over device on line switches on with consumer before, detects first input information of first alternating current power supply equipment 300, and will first input information sends for monitoring unit 120. In the embodiment of the present invention, the monitoring unit 120 further includes a sampling signal receiving unit for receiving the first input information of the first ac power supply device 300 sent by the sampling tracking unit 150.
In the embodiment of the present invention, the different power sources ac online cutting device 100 further includes a protection unit 170. The sampling tracking unit 150 is further configured to detect whether the first ac power supply device 300 and the second ac power supply device 200 are synchronous after the monitoring unit 120 controls the on-line ac tapping device 100 for different power supplies to be switched on with the electric equipment 500. And if the synchronization is not achieved, sending a signal to the protection unit 170, so that the protection unit 170 performs circuit protection.
In the embodiment of the present invention, the different power sources ac online cutting device 100 further includes an output detection unit 140. The output detection unit 140 is configured to detect the first ac power device 300 and the second ac power device 200 after the load synchronization unit 130 performs synchronization processing, and determine whether the first ac power device 300 and the second ac power device 200 are synchronized, that is, detect whether the first output information and the first input information are synchronized. If not, a signal is sent to the protection unit 170, and simultaneously, an alarm message is sent to the alarm unit, so that the alarm unit controls the alarm indicator lamp 9 to give an alarm prompt.
Wherein, in the embodiment of the utility model provides an in, different alternating currents cut over device 100 on line still including setting up emergency stop button 7, speaker 8, warning indicator lamp 9, normal operating indicator lamp 10, carrying handle 14 on the cabinet body and setting up in the radiating groove 11 of the left and right sides face of the cabinet body 1. Wherein, the embodiment of the utility model provides a do not inject the concrete structure of the cabinet body 1, for example, the embodiment of the utility model provides an in the cabinet body 1 can be in the square structure, cuboid structure arbitrary one. Wherein, the emergency stop button 7 is connected with an emergency stop switch of the cut-over circuit, and the emergency stop switch is connected with the second four-phase input terminal 3 and is used for controlling the device 100 to be disconnected when an emergency occurs.
Referring to fig. 3 to 4, fig. 3 to 4 are schematic diagrams illustrating a process of performing cutting on the first ac power device 300 and the second ac power device 200 by the on-line ac cutting apparatus for different power sources according to the embodiment of the present invention. The specific operation is described below. The different-source alternating-current on-line cutting device achieves the effect that the first alternating-current power supply equipment 300 is replaced by the second alternating-current power supply equipment 200 to supply power to the electric equipment 500 under the condition of no power failure. Before the cutting, the first ac power device 300 is connected to the electrical equipment 500 through the power distribution cabinet 400, so that the first ac power device 300 supplies power to the electrical equipment 500. The utility model discloses different source alternating currents cut over device 100 on line, as the device of detection and control in the process of cutting over, connect first alternating current power supply equipment 300, second alternating current power supply equipment 200 and power distribution cabinet 400 on the one hand, on the one hand through the device as the intermediary, realized not cutting over with cutting off the power supply, finally make second alternating current power supply equipment 200 replace first alternating current power supply equipment 300, come to supply power for consumer 500 through power distribution cabinet 400. Here, the first ac power supply apparatus 300 and the second ac power supply apparatus 200 each have a battery function, and may be UPS apparatuses, for example.
Because the output capacity of a power supply or a parallel system is large, the output of the power supply needs to be redistributed to supply power to electric equipment, such as a computer host, an air conditioner, a terminal, lighting, a security system and the like. Therefore, a power distribution cabinet is connected between the power source and the electric equipment. Each power supply therefore has its own independent switching input in the power distribution cabinet, through which the power supply is connected to the consumer. A plurality of switch input ends can be correspondingly arranged between the power supply and the electric equipment. In the embodiment of the present invention, the power distribution cabinet 400 at least includes the first switch input terminal 15 and the second switch input terminal 17. The first switch input terminal 15 and the second switch input terminal 17 can both be connected to a power supply to supply power to the same electric device 500.
The utility model discloses first alternating current power supply equipment 300 and second alternating current power supply equipment 200 also all have a plurality of switch output terminals, and every switch output terminal all is connected with the output circuit breaker who corresponds and connects. Specifically, a first switch output terminal (not shown in the figure) of the first ac power supply apparatus 300 is connected to a first output breaker of the first ac power supply apparatus 300, and a third switch output terminal 16 of the first ac power supply apparatus 300 is connected to a third output breaker of the first ac power supply apparatus 300; the second switch output terminal 14 of the second ac power supply apparatus 200 is connected to the second output breaker of the second ac power supply apparatus 200, and the fourth switch output terminal 19 of the second ac power supply apparatus 200 is connected to the fourth output breaker of the second ac power supply apparatus 200; the first switch input terminal 15 is connected to a first input switch of the power distribution cabinet 400, and the second switch input terminal 17 is connected to a second input switch of the power distribution cabinet 400. Controlling the closing and opening of the second switch output terminal 14 by controlling the closing and opening of the second output breaker; controlling the closing and opening of the third switch output terminal 16 by controlling the closing and opening of the third output breaker; controlling the closing and opening of the fourth switch output terminal 19 by controlling the closing and opening of the fourth output breaker; controlling the closing and opening of the first switch input terminal 15 by controlling the closing and opening of the first input switch; the closing and opening of the second switch input terminal 17 is controlled by controlling the closing and opening of the second input switch.
The working process of the device is as follows:
first, the second four-phase input terminal 3 of the different-source alternating-current on-line tapping device 100 is connected to the second switch output terminal 14 of the second alternating-current power supply apparatus 200, and the first four-phase output terminal 3 of the different-source alternating-current on-line tapping device 100 is connected to the first input terminal 15 of the power distribution cabinet 400. Specifically, one end of the second incoming cable 2 is connected to the second switch output terminal 14 of the second ac power supply apparatus 200, and the other end is connected to the second four-phase input terminal 3 of the different ac power on-line tapping device 100. The different alternating current is connected to the first four-phase output terminal 12 of the line tapping device 100 and the first input terminal 15 of the power distribution cabinet 400 through the outgoing cable 13.
Then, the second output breaker connected to the second switch output terminal 14 is closed to power the different ac power source online cutting device 100, and the first input switch of the first switch input terminal 15 is closed to conduct the different ac power source online cutting device 100, the power distribution cabinet 400 and the electric equipment 500.
In this embodiment, the second ac power supply device 200 is also used as an input power supply of the ac online cutting device 100 with different sources to supply power to the ac online cutting device 100 with different sources. When the second output breaker in the second switch output terminal 14 is closed, the energizing of the different source alternating current line disconnect device 100 is initiated.
At this time, the different ac sources are conducted between the on-line tapping device 100 and the second ac power equipment 200, and the different ac sources are conducted between the on-line tapping device 100, the power distribution cabinet 400 and the electric equipment 500. However, at this time, the first ac power supply apparatus 300 and the second ac power supply apparatus 200 are not synchronized, and thus the second ac power supply apparatus 200 and the power distribution cabinet 400 are not yet conducted.
Then, the different-source ac online cut-over apparatus 100 determines whether the first ac power supply device 300 and the second ac power supply device 200 are synchronized; if the current information is not synchronous, processing second input information of the second alternating current power supply device 200 according to first input information of the first alternating current power supply device 300 to obtain first output information of the second alternating current power supply device 200 synchronous with the first alternating current power supply device 300, wherein a third switch output terminal 16 of the first alternating current power supply device 300 is connected with a second switch input terminal 17 of the power distribution cabinet 400 through a direct connection cable 18 to supply power to the electric devices through the power distribution cabinet 400.
The process of performing the synchronous processing on the ac online cutting device 100 with different power supplies is implemented by matching the units of the ac online cutting device 100 with each other, and the specific process is the same as that in the above embodiment, and is not described herein again.
The first ac power supply device 300 is connected to the first end of the direct connection cable 18 through the third output breaker of the third switch output terminal 16, and is connected to the second switch input terminal 17 of the power distribution cabinet 400 through the second end of the direct connection cable 18, so as to supply power to the electric device 500.
When the different-source alternating-current online cutting device 100 determines that the second alternating-current power supply equipment 300 is synchronous with the first alternating-current power supply equipment 200, the different-source alternating-current online cutting device 100 is controlled to be conducted with the electric equipment 500, so that the second alternating-current power supply equipment 200 is conducted with the electric equipment 500 through the different-source alternating-current online cutting device 100, and the first alternating-current power supply equipment 300 and the second alternating-current power supply equipment 200 simultaneously supply power to the electric equipment through the power distribution cabinet.
The conduction between the different source alternating current online cutting device 100 and the power distribution cabinet 400 is controlled by the output control unit of the different source alternating current online cutting device 100. The output control unit comprises an alternating current contactor and a closing switch. The closing switch is used for generating a closing trigger signal after receiving the closing trigger. When determining that the second ac power supply device 300 is synchronized with the first ac power supply device 200, the monitoring unit presses a closing button, the closing switch is closed, and after the monitoring unit 120 of the different-source ac online tapping device 100 determines that the first ac power supply device 200 is completely synchronized, the monitoring unit sends a closing command, the output control unit receives the closing command, and the ac contactor is closed, so that the second ac power supply device 200 supplies power to the electric device 500 by using the first output information. As shown in fig. 4, at this time, the first ac power supply apparatus 300 and the second ac power supply apparatus 200 simultaneously supply power to the electric devices through the power distribution cabinet.
Then, the third switch output terminal 16 of the first ac power supply apparatus 300 and the second switch input terminal 17 of the power distribution cabinet 400 are disconnected, and the end of the direct connection cable 18 connected to the first ac power supply apparatus 300 is cut to the fourth switch output terminal 19 of the second ac power supply apparatus 200.
Wherein the third switch output terminal 16 comprises a third output breaker, the second switch input terminal 17 comprises a second input switch, and the fourth switch output terminal 19 comprises a fourth output breaker.
Finally, the fourth switch output terminal 19 of the second ac power supply apparatus 200 and the second switch input terminal 17 of the power distribution cabinet 400 are closed, so that the second ac power supply apparatus 200 supplies power to the electric device 500 through the direct-connected cable 18 and the power distribution cabinet 400.
As shown in fig. 4, at this time, the second ac power supply device 200 supplies power to the electric device 500 through the different ac power sources respectively at the on-line cutting device 100 and the direct-connected cable 18. And disconnecting the second switch output terminal 14, the second four-phase input terminal 3, the first four-phase output terminal 12 and the first switch input terminal 15, and removing the connected incoming cable 3 and outgoing cable 13, so that the second alternating current power supply device 200 only supplies power to the electric equipment 500 through the direct-connection cable 18, and the cutting is completed.
The embodiment of the utility model provides a through set up power output synchronous circuit in cutting and connecing the device, carry out voltage, frequency, harmonic content and phase adjustment to stand-by power supply to make stand-by power supply and main output after connecting in parallel in step, realized not cutting and connecing with the outage on line.
Further, the embodiment of the utility model provides a need not to set up uninterrupted power source equipment into the bypass mode, cut over even the commercial power input trouble still can keep uninterrupted power supply among the in-process, cut over risk greatly reduced.
Further, the embodiment of the utility model provides a protection circuit real-time supervision cuts two way mains voltage of activestandby, frequency, phase sequence, harmonic, synchronous reference signal of in-process activestandby, reports an emergency and asks for help or increased vigilance to unusual, has further improved the security of cutting the in-process.
The algorithms or displays presented herein are not inherently related to any particular computer, virtual system, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such a system will be apparent from the description above. Furthermore, embodiments of the present invention are not directed to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any descriptions of specific languages are provided above to disclose the best modes of the invention.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the embodiments of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: rather, the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Moreover, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names. The steps in the above embodiments should not be construed as limiting the order of execution unless specified otherwise.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021440605.XU CN213027526U (en) | 2020-07-20 | 2020-07-20 | Different source alternating current on-line cutting device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021440605.XU CN213027526U (en) | 2020-07-20 | 2020-07-20 | Different source alternating current on-line cutting device |
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