CN108270286B - Low-voltage power distribution system and control method - Google Patents
Low-voltage power distribution system and control method Download PDFInfo
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- CN108270286B CN108270286B CN201611263229.XA CN201611263229A CN108270286B CN 108270286 B CN108270286 B CN 108270286B CN 201611263229 A CN201611263229 A CN 201611263229A CN 108270286 B CN108270286 B CN 108270286B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
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Abstract
The invention provides a low-voltage power distribution system and a control method. The control method of the low-voltage power distribution system comprises the following steps: when the digital power distribution terminal of the low-voltage power distribution loop is in a remote control mode, receiving remote information sent by an upper computer through a data acquisition device; acquiring a control instruction or a parameter for control from the remote information; and controlling the circuit breaker connected with the digital power distribution terminal according to the control instruction or the parameters for controlling. The method can realize remote control of the circuit breaker.
Description
Technical Field
The invention relates to the field of low-voltage power distribution, in particular to a low-voltage power distribution system and a control method.
Background
With the development of modern technology, high-rise buildings are more and more, and electric equipment of various enterprises is more and more complex, so that higher requirements are put forward on the operation safety, reliability and intelligent management of a power distribution system, particularly a low-voltage power distribution system.
The circuit breaker is used as one of important electrical elements in a low-voltage distribution system, is used for switching on and off circuit current, and can reliably and rapidly cut off the circuit when faults such as overload, short circuit, grounding and the like occur, so that an electrical distribution network and industrial equipment are protected from being damaged.
At present, a circuit breaker in the low-voltage power distribution industry usually adopts a manual opening and closing mode, and when a power distribution cabinet in a long-distance or even a mountain area needs to be opened or closed, the manual opening and closing mode cannot meet timely opening and closing operation, and operation safety of operators cannot be guaranteed.
Disclosure of Invention
The embodiment of the invention provides a low-voltage power distribution system and a control method, which are used for solving the problem of inconvenient control of a circuit breaker.
To achieve the above object, an embodiment of the present invention provides a control method of a low voltage power distribution system, including: when the digital power distribution terminal of the low-voltage power distribution loop is in a remote control mode, receiving remote information sent by an upper computer through a data acquisition device; acquiring a control instruction or a parameter for control from the remote information; and controlling the circuit breaker connected with the digital power distribution terminal according to the control instruction or the parameters for controlling.
Further, before the remote information sent by the upper computer is received by the data collector, the method further comprises the following steps: and the upper computer judges whether the low-voltage distribution circuit is faulty according to the electrical information of the low-voltage distribution circuit, if the low-voltage distribution circuit is determined to be faulty, a prompt message for confirming whether the upper computer generates a control instruction is generated, and the control instruction in the remote information is generated in response to the confirmation operation of the prompt message.
Further, the control instruction in the remote information is generated by the upper computer according to the opening instruction or the closing instruction received by the man-machine interaction interface of the upper computer.
Further, parameters for control in the remote information are generated by the upper computer according to the received switching-off time period; according to the parameter for controlling, control the circuit breaker that links to each other with digital distribution terminal, include: determining whether the current time is within a brake-off time period; if the current time is within the opening time period and the connected breaker is not opened, sending an opening electric signal to the electric operating mechanism to open the breaker.
Further, the method further comprises the following steps: when a digital power distribution terminal of a low-voltage power distribution loop is in a local control mode, detecting electric data of the low-voltage power distribution loop where the digital power distribution terminal is located; determining whether the low-voltage distribution circuit fails according to the electrical data of the low-voltage distribution circuit; if the low-voltage distribution loop fails, a brake-separating electric signal is sent to the electric operating mechanism, so that the electric operating mechanism drives the connected breaker to separate the brake.
Further, if the low-voltage distribution loop fails, a brake-separating electric signal is sent to the electric operating mechanism, so that the electric operating mechanism drives the connected circuit breaker to separate the brake, and the method further comprises the following steps: and sending the information of the low-voltage distribution loop faults to an upper computer through a data acquisition device.
Further, the method further comprises the following steps: when the digital power distribution terminal of the low-voltage power distribution loop is in a local control mode, the digital power distribution terminal receives a control instruction input through a touch screen or parameters for control; the control instruction comprises a brake opening instruction or a brake closing instruction, and the parameters for controlling comprise a brake opening time period; and sending a brake opening electric signal or a brake closing electric signal to the connected electric operating mechanism according to the control instruction or the parameter to control the brake opening or the brake closing of the circuit breaker.
According to another aspect of the present invention, there is provided a low voltage power distribution system including an upper computer, a data collector, a digital power distribution terminal provided in a low voltage power distribution circuit, and a circuit breaker connected to the digital power distribution terminal through an electric operating mechanism; the digital power distribution terminal is connected with the upper computer through the data acquisition device and receives remote information which is remotely transmitted by the upper computer through the data acquisition device, and when a control instruction in the remote information or a parameter for control indicates to perform opening operation or closing operation, the digital power distribution terminal transmits an opening electric signal or a closing electric signal to the electric operating mechanism so that the electric operating mechanism drives the circuit breaker to open or close.
Further, the digital power distribution terminal comprises a central processing unit and a communication element; the central processing unit is connected with the communication element, receives remote information remotely sent by the upper computer through the data acquisition unit through the communication element, and sends an opening electric signal or a closing electric signal to the electric operating mechanism when a control instruction in the remote information or a parameter for control indicates to perform opening operation or closing operation, so that the electric operating mechanism drives the breaker to open or close; the digital power distribution terminal further includes: the detection element is connected with the central processing unit, detects the electrical data of the low-voltage distribution circuit and sends the electrical data to the central processing unit; the central processing unit is also used for sending the electric data to the data acquisition unit through the communication element and sending the electric data to the upper computer through the data acquisition unit.
Further, the digital power distribution terminal further comprises a touch screen, the touch screen is connected with the central processing unit, information sent by the central processing unit is received and displayed, and/or a control instruction input through the touch screen or a parameter for control is sent to the central processing unit, wherein the control instruction comprises a switching-off instruction or a switching-on instruction, and the parameter for control comprises a switching-off time period.
According to the control method of the low-voltage power distribution system, the digital power distribution terminal of the low-voltage power distribution circuit has a remote control mode, the digital power distribution terminal can receive remote information sent by the upper computer and control the connected circuit breakers to be on-off according to the remote information, so that the circuit breakers of the low-voltage power distribution circuit can be remotely controlled, and the problem that the circuit breakers of the low-voltage power distribution circuit are inconvenient to control is solved.
Drawings
Fig. 1 is a flowchart showing steps of a control method of a low voltage power distribution system according to a first embodiment of the present invention;
fig. 2 is a flowchart showing steps of a control method of a low-voltage power distribution system according to a second embodiment of the present invention;
fig. 3 is a flowchart showing steps of a control method of a low voltage power distribution system according to a third embodiment of the present invention;
fig. 4 is a flowchart showing steps of a control method of a low voltage power distribution system according to a fourth embodiment of the present invention;
fig. 5 is a flowchart showing steps of a control method of a low voltage power distribution system according to a fifth embodiment of the present invention;
fig. 6 is a block diagram showing a low-voltage distribution system according to a sixth embodiment of the present invention;
fig. 7 shows a block diagram of a digital power distribution terminal in the low-voltage power distribution system shown in the sixth embodiment;
fig. 8 shows a data transmission flow chart of the low-voltage power distribution system shown in the sixth embodiment.
Detailed Description
The following description of embodiments of the present invention will be made in further detail with reference to the drawings (like numerals designate like elements throughout the several views) and examples. The following examples are illustrative of embodiments of the invention and are not intended to limit the scope of the embodiments of the invention.
It will be appreciated by those of skill in the art that the terms "first," "second," etc. in embodiments of the present invention are used merely to distinguish between different steps, devices or modules, etc., and do not represent any particular technical meaning nor necessarily logical order between them.
The low-voltage distribution system in the embodiment of the invention comprises an upper computer, a data acquisition device, a low-voltage distribution loop and the like, wherein the low-voltage distribution loop is provided with a digital distribution terminal, an electric operating mechanism connected with the digital distribution terminal, a circuit breaker and the like. The upper computer is used for data collection, processing, analysis and the like. The data collector is used for carrying out data interaction and transmission, and is used for collecting electrical data, fault information and the like sent by the digital power distribution terminal of the low-voltage power distribution loop, transmitting the electrical data, the fault information and the like to the upper computer, or receiving remote information and the like transmitted by the upper computer, and transmitting the remote information to the digital power distribution terminal. The digital power distribution terminal is used for detecting the electrical data of the connected low-voltage power distribution circuit and controlling elements in the low-voltage power distribution circuit, such as switching on or switching off of a circuit breaker. The electrically operated mechanism is an electromechanical structure that can be moved under the control of a digital distribution terminal to open or close a circuit breaker that is connected.
For a low voltage power distribution system, it may include one or more low voltage power distribution circuits, each of which may be configured with a digital power distribution terminal. The digital power distribution terminal is connected with the data acquisition device, and the data acquisition device acquires the data of the digital power distribution terminal connected with the digital power distribution terminal according to preset conditions (such as preset time intervals). One or more data collectors are connected with an upper computer, and transmit information to or receive information from the upper computer according to preset conditions (such as preset time intervals or receiving preset types of information).
Example 1
Referring to fig. 1, a flowchart illustrating steps of a control method of a low voltage power distribution system according to a first embodiment of the present invention may specifically include the following steps:
step S120: when the digital power distribution terminal of the low-voltage power distribution loop is in a remote control mode, the digital power distribution terminal receives remote information sent by the upper computer through the data acquisition device.
Through setting up digital distribution terminal on low voltage distribution return circuit, collect the electrical data of low voltage distribution return circuit to control low voltage distribution return circuit. The digital power distribution terminal has a remote control mode, and supports remote control of the upper computer, so that the control is more convenient. The digital power distribution terminal performs data interaction with the upper computer through the data acquisition device, and the data acquisition device is used for receiving remote information sent by the upper computer.
Step S140: the digital power distribution terminal acquires control instructions or parameters for control from the remote information.
After the digital power distribution terminal receives the remote information, the remote information is processed, and a control instruction (such as a brake opening instruction, a brake closing instruction and the like) or a parameter (such as time, current or voltage and the like which are input by a user on an upper computer and used for controlling) is obtained from the remote information.
The control instruction or the parameter for controlling the remote information can be generated by the upper computer according to the instruction or the parameter input by the user, or can be generated by the upper computer according to the state of the low-voltage distribution circuit after analyzing the electric data of the low-voltage distribution circuit.
Step S160: and the digital power distribution terminal controls the circuit breaker connected with the digital power distribution terminal according to the control instruction or the parameters for controlling.
After the digital power distribution terminal acquires the control instruction or the parameter for control, the digital power distribution terminal controls the corresponding circuit breaker according to the control instruction or the parameter. For example, the control command is to trip one or more circuit breakers, the digital distribution terminal opens the corresponding one or more circuit breakers connected thereto.
According to the control method of the low-voltage power distribution system, remote data interaction is carried out through the upper computer, the data acquisition device and the digital power distribution terminal, when the digital power distribution terminal is in a remote mode, the upper computer can remotely control the circuit breaker through the digital power distribution terminal, and on the premise that the circuit breaker can be controlled remotely, the control convenience is improved, the common circuit breaker with the opening and closing functions is used, and the cost of the low-voltage power distribution system can be reduced.
The method of the upper computer for generating the remote information can be various, for example, after the upper computer analyzes the received electrical data of the low-voltage power distribution circuit, the upper computer generates the remote information with different control instructions or parameters for control; and secondly, the upper computer receives an instruction input by a user or parameters input by the user through a human-computer interaction interface, and generates remote information according to the instruction or parameters input by the user. The following will further explain the above-described modes by way of example two through example four.
Example two
Referring to fig. 2, a flow chart of steps of a control method of a low voltage power distribution system according to a second embodiment of the present invention is shown.
In this embodiment, a first mode of generating remote information by a host computer is taken as an example, and a control method of a low-voltage power distribution system will be described. The control method of the low-voltage power distribution system of the embodiment comprises the following steps:
step S220: and the digital power distribution terminal sends the electric data of the low-voltage power distribution loop to the upper computer through the data acquisition device.
The digital power distribution terminal may detect and collect electrical data (e.g., voltage values, phase current values, and residual current values, temperature values, etc.) of the low voltage power distribution loop. The digital power distribution terminal transmits the electric data to the upper computer through the data acquisition device, and the upper computer can judge whether the low-voltage power distribution circuit works normally or not according to the electric data, and whether the low-voltage power distribution circuit has faults or not. If the upper computer judges that the low-voltage power distribution system fails, a prompt message for confirming whether the upper computer generates a control instruction or not is generated, the prompt message is transmitted to the digital power distribution terminal, and the digital power distribution terminal displays the prompt message and is selected by a user. If the user selects to confirm that the control instruction is generated by the upper computer, the upper computer generates the control instruction in the remote information according to the electrical information of the low-voltage power distribution circuit. If a brake-separating instruction is sent to the digital power distribution terminal, the circuit breaker corresponding to the low-voltage power distribution circuit with the fault is indicated to be separated for protection and the like. If the user selects to reject the control command generated by the upper computer, the digital power distribution terminal can control the digital power distribution terminal by itself, and the command for controlling the circuit breaker is generated according to the faults and fault types of the low-voltage power distribution circuit sent by the upper computer.
And if the upper computer judges that the low-voltage power distribution system has no fault, the upper computer does not act.
The protection functions of the upper computer through the digital power distribution terminal include, but are not limited to: overload long-time delay protection, short-circuit short-time delay protection, short-circuit instantaneous protection, voltage and current unbalance protection, overvoltage and undervoltage protection, open-phase protection, phase sequence protection, frequency protection, ground fault protection, neutral line protection, residual current protection and the like.
Step S240: the digital power distribution terminal receives remote information sent by the upper computer through the data acquisition device.
The digital power distribution terminal receives remote information generated after the upper computer analyzes the electrical data of the low-voltage power distribution loop through the data acquisition device. The method is that the upper computer sends the remote information to the data collector, and the data collector transmits the remote information to the corresponding digital power distribution terminal.
Step S260: the digital power distribution terminal acquires control instructions from the remote information.
The digital power distribution terminal processes the remote information and obtains control instructions, such as a brake-separating instruction, from the remote information.
Step S280: and controlling the circuit breaker connected with the digital power distribution terminal according to the control instruction.
And the digital power distribution terminal controls the corresponding circuit breaker to perform corresponding operation according to the control instruction. If the control command is a brake-separating command, the breaker is controlled to perform brake separation. Specifically, the digital power distribution terminal is connected with the circuit breaker through an electric operating mechanism, and the circuit breaker is driven to be opened or closed through the electric operating mechanism.
The control method of the low-voltage distribution system adopting the mode analyzes the electrical data of the low-voltage distribution loop through the upper computer, and when the low-voltage distribution equipment fails, the circuit breaker of the low-voltage distribution equipment can be remotely controlled to perform operations such as opening, and the like, so that the remote control can be realized, the low-voltage distribution loop can be timely protected, and the safety and convenience of the low-voltage distribution system are improved.
Example III
Referring to fig. 3, a flow chart of steps of a control method of a low voltage power distribution system according to a third embodiment of the present invention is shown.
In this embodiment, a control method of a low-voltage power distribution system will be described by taking a mode of generating remote information according to an input control command as an example in a second mode of generating remote information by a host computer. The control method of the low-voltage power distribution system of the embodiment comprises the following steps:
step S320: the user inputs instructions through a man-machine interaction interface provided by the upper computer, and the upper computer generates remote information according to the input instructions.
The upper computer can be provided with a display screen and an input loop, the display screen is used for displaying a man-machine interaction interface, and the input loop is used for inputting instructions, such as a switching-off instruction or a switching-on instruction, through the man-machine interaction interface provided by the upper computer. And the upper computer generates a control instruction in the remote information according to the opening instruction or the closing instruction received by the man-machine interaction interface of the upper computer.
This is often the case when a user or monitoring person needs to temporarily deactivate or resume operation of one or more low voltage power distribution circuits. At this time, a user or a monitoring person inputs an instruction to the upper computer through the man-machine interaction interface, the upper computer generates remote information according to the instruction, the remote information is transmitted to the digital power distribution terminal through the data collector, and the digital power distribution terminal performs processing from step S340 to step S380 after receiving the remote information, so that the corresponding breaker is opened or closed.
Step S340: the digital power distribution terminal receives remote information sent by the upper computer through the data acquisition device.
Step S360: the digital power distribution terminal acquires control instructions from the remote information.
Step S380: and controlling the circuit breaker connected with the digital power distribution terminal through the connected electric operating mechanism according to the control instruction.
Since steps S340 to S380 are identical to steps S240 to S280 in the second embodiment, the working process thereof is not described herein.
The remote control device is characterized in that a control command is received by an upper computer on an original low-voltage distribution system, remote information is generated according to the control command, the remote information is transmitted to a digital distribution terminal (with functions of collecting data such as current and voltage, analyzing and judging, through a CAN bus communication function, a protection device action function of a controllable distribution line and the like) through a data collector, the remote information sent by the upper computer is read by the digital distribution terminal, an electric operating mechanism (one of the protection devices of the distribution line) is started to control the on-off of a circuit breaker, and the remote control function of the upper computer on the circuit breaker is completed. When the staff operates:
and an operator sends out an instruction at the upper computer, the upper computer transmits the instruction to the data acquisition unit through a network cable, and the data acquisition unit transmits the instruction to the digital power distribution terminal through a data transmission bus such as a 485 bus. The digital power distribution terminal drives the electric operating mechanism to control the closing or opening of the circuit breaker, and the remote control circuit opening or closing operation is completed. Through the mode, a user can remotely control the low-voltage power distribution circuit, so that the control is more convenient, and the personal safety of staff can be effectively protected by controlling the low-voltage power distribution circuit in a dangerous or severe environment. Meanwhile, remote operation of the low-voltage power distribution cabinet can be completed through remote control switching-on and switching-off, the problems of instant control and safe operation are solved, and operation of operators is facilitated.
Example IV
Referring to fig. 4, a flow chart of steps of a control method of a low voltage power distribution system according to a fourth embodiment of the present invention is shown.
In this embodiment, a method of controlling a low-voltage power distribution system will be described by taking as an example a method of generating remote information based on input parameters in a second method of generating remote information by a host computer. The control method of the low-voltage power distribution system of the embodiment comprises the following steps:
step S400: the user inputs parameters for control through a man-machine interaction interface provided by the upper computer, and the upper computer generates remote information according to the input parameters.
When the user inputs through the upper computer, besides directly inputting explicit instructions such as opening or closing, some parameters may be input, so that the low-voltage distribution circuit operates according to the set parameters, for example, the user inputs a time period for opening the breaker, and the time period for opening the breaker is indicated. When the upper computer receives the parameters, remote information is generated according to the parameters.
Step S420: when the digital power distribution terminal of the low-voltage power distribution system is in a remote control mode, the remote information sent by the upper computer is received through the data acquisition device.
The remote information is used for controlling the remote information, and parameters used for controlling are generated by the upper computer according to the received switching-off time period. Specifically, the user or other staff can input corresponding parameters, such as the time period for opening the gate, to the upper computer by using an interface, an input loop and a man-machine interaction interface provided by the upper computer. And after the upper computer receives the parameters, generating parameters for control according to the parameters, and transmitting the parameters to the digital power distribution terminal. In this case, the remote information includes parameters for control.
Step S440: parameters for control are obtained from the remote information.
The digital power distribution terminal processes the remote information and obtains parameters for control from the remote information. For example, the opening time period is obtained therefrom.
Step S460: and determining whether the current time is within the opening time period.
After the parameters for control are obtained, the digital power distribution terminal firstly judges whether the parameters are met or not when the digital power distribution terminal performs breaker control according to the parameters. Taking the received parameters as a switching-off time period, the indication 8:00 pm-6: 00am is an example of the opening time period. After the digital power distribution terminal acquires the parameter, the digital power distribution terminal acquires the current time first, and then determines whether the current time is 8:00 pm-6: during this period of 00am (of course, in other embodiments, the opening period may be a plurality of separated periods), if the period is within this period, step S480a is performed; if not, step S480b is performed.
Step S480a: if the connected breaker is not opened, an opening electric signal is sent to the electric operating mechanism to open the breaker.
If the current time is within the opening time period and the connected breaker is not opened, the digital power distribution terminal sends an opening electric signal to the electric operating mechanism so that the electric operating mechanism drives the breaker to open. If the current time is within the opening time period, but the connected breaker is opened, the digital power distribution terminal can not act.
Step S480b: if the current time is not in the opening time period, the operation is not performed.
If the current time is not in the opening time period, the opening is not needed, and the breaker is in a closing state by default, so that the digital power distribution terminal does not need to act, and the closing state of the breaker is maintained.
In the process, in order to improve the intelligence and the reliability, when the condition that the breaker is not in a switching-off time period and is in a switching-on state is required, the state of the target breaker is acquired, namely, whether the target breaker is in the switching-off state or the switching-on state currently is determined, if the target breaker is in the switching-off state and is not generated due to a fault, the current state of the breaker is not required, and the digital power distribution terminal can send a switching-on electric signal to enable the electric operating mechanism to drive the target breaker to switch on.
In this embodiment, in the existing low-voltage power distribution system, an upper computer or an integrated display device with a control function is added for control, and the electric operating mechanism is driven to control the opening and closing of the circuit breaker through the transparent transmission of the data collector and the analysis and judgment of the digital power distribution terminal (with the functions of collecting data such as current and voltage, analyzing and judging, communicating through a CAN bus, controlling the action function of a protection device of a power distribution line, and the like). Control of the operation/stop of the power consumption circuit required at a specific time is completed.
When the staff operates:
an operator sets a time period required to work or stop on an upper computer or a display screen (an integrated machine with control and display functions), then the time period is transmitted to a digital power distribution terminal through a data acquisition unit, the digital power distribution terminal compares and judges the preset time period with real-time, and when the time reaches a demarcation point of the preset time period, the digital power distribution terminal drives an electric operating mechanism to operate, controls the opening and closing of a circuit breaker, and realizes timing automatic operation or operation of stopping certain power utilization loops.
By the mode, a user can control the low-voltage power distribution circuit in a time-sharing manner, so that the control is more convenient, and the low-voltage power distribution circuit can be started or stopped automatically according to intervals or fixed time, so that labor cost is saved, and the working environment of three shifts is improved; but also effectively solves the problem of waste caused by uninterrupted work of the power utilization loop due to forgetting of people and the like.
Example five
Referring to fig. 5, a flowchart illustrating steps of a control method of a low voltage power distribution system according to a fifth embodiment of the present invention specifically includes the following steps:
in step S520, when the digital power distribution terminal of the low voltage power distribution loop is in the local control mode, the digital power distribution terminal detects the electrical data of the low voltage power distribution loop where the digital power distribution terminal is located.
The digital power distribution terminal has a local control mode in addition to a remote control mode. The local control mode is that the digital power distribution terminal collects the electrical data of the low-voltage power distribution circuit, analyzes the electrical data, and controls the low-voltage power distribution circuit according to the electrical data, and the control process does not need remote data interaction.
And step S540, the digital power distribution terminal judges whether the low-voltage power distribution circuit fails according to the electrical data of the low-voltage power distribution circuit.
When the digital power distribution terminal is in a local control mode, analyzing the detected and collected electrical data (such as voltage value, current value of each phase, residual current value, temperature value and the like) of the low-voltage power distribution circuit, and judging whether the low-voltage power distribution circuit works normally or not according to the electrical data, and whether the low-voltage power distribution circuit has faults or not.
If the low-voltage distribution loop is judged to have overload, short circuit, unbalanced voltage and current, overvoltage, undervoltage, phase failure and the like. If the low-voltage power distribution circuit has a fault, step S560 is executed, and if the low-voltage power distribution circuit has no fault, step S520 is returned to continue to execute, and detection and analysis are continued.
Step S560: if the low-voltage power distribution circuit has faults, the digital power distribution terminal sends a brake-separating electric signal to the electric operating mechanism, so that the electric operating mechanism drives the connected breaker to separate the brake.
If the digital power distribution terminal judges that the low-voltage power distribution circuit fails, the digital power distribution terminal sends a brake-separating electric signal to the electric driving mechanism to enable the electric operating mechanism to move, so that a breaker corresponding to the low-voltage power distribution circuit with the failure is separated, and protection is carried out.
Step S580: and the digital power distribution terminal sends the fault information of the low-voltage power distribution equipment to the upper computer through the data acquisition device.
After the digital power distribution terminal judges the fault of the low-voltage power distribution loop and switches off the breaker, the digital power distribution terminal transmits fault information to the upper computer through the data acquisition device so as to store for subsequent inquiry and the like.
According to the digital power distribution terminal of the control method of the low-voltage power distribution system, the low-voltage power distribution circuit is controlled locally in real time by analyzing the electrical data of the low-voltage power distribution circuit, so that the control of the low-voltage power distribution circuit is more timely and effective, and the power distribution safety is more effectively ensured.
When the digital power distribution terminal is in a local control mode, the low-voltage power distribution loop can be controlled in a mode of manually inputting instructions, for example, the digital power distribution terminal receives control instructions or parameters for controlling which are input through a touch screen arranged on the digital power distribution terminal and sends opening electric signals or closing electric signals to an electric operating mechanism connected with the digital power distribution terminal according to the control instructions or the parameters so as to enable the circuit breaker to be opened or closed.
Protection functions that may be performed by a digital power distribution terminal include, but are not limited to: overload long-time delay protection, short-circuit short-time delay protection, short-circuit instantaneous protection, voltage and current unbalance protection, overvoltage and undervoltage protection, open-phase protection, phase sequence protection, frequency protection, ground fault protection, neutral line protection, residual current protection and the like.
These control commands may be open or close commands. The parameters to be controlled may be a switching-off period, and the process of controlling according to the switching-off period in the local control mode is consistent with the control process in the remote control mode, which is not described herein.
Example six
Referring to fig. 6, a block diagram of a low voltage power distribution system according to a sixth embodiment of the present invention is shown.
The low-voltage power distribution system of the present embodiment includes: the upper computer 650, the data collector 630, the digital power distribution terminal 620 provided in the low voltage power distribution circuit, and the circuit breaker 610 connected to the digital power distribution terminal 620 through the electric operating mechanism 640.
The digital power distribution terminal 620 is connected with the upper computer 650 through the data collector 630, and receives remote information remotely sent by the upper computer 650 through the data collector 630, when a control instruction in the remote information or a parameter for control indicates to perform a switching-off operation or a switching-on operation, the digital power distribution terminal 620 sends a switching-off electric signal or a switching-on electric signal to the electric operating mechanism 640, so that the electric operating mechanism 640 drives the circuit breaker 610 to switch off or switch on.
The structure of the digital power distribution terminal 620 in this embodiment is shown in fig. 7. In fig. 7, digital power distribution terminal 620 includes a central processor 6201, a communication element 6202, and a detection element 6203.
The central processor 6201 is connected with the communication element 6202, receives remote information remotely sent by the upper computer 650 through the data collector 630 through the communication element 6202, and sends an opening electric signal or a closing electric signal to the electric operating mechanism 640 when a control instruction in the remote information or a parameter for control indicates to perform opening operation or closing operation, so that the electric operating mechanism 640 drives the circuit breaker 610 to open or close;
the detection element 6203 is connected to the central processor 6201, and detects electrical data of the low-voltage distribution circuit and transmits the detected electrical data to the central processor 6201.
The central processor 6201 is further configured to send the electrical data to the data collector 630 through the communication element 6202, and to send the electrical data to the host computer through the data collector.
The digital power distribution terminal 620 further includes a touch screen 6204, where the touch screen 6204 is connected to the central processor 6201, receives and displays information sent by the central processor 6201, and/or sends a control instruction or a parameter for controlling, which is input through the touch screen 6204, to the central processor 6201, where the control instruction includes a switching-off instruction or a switching-on instruction, and the parameter for controlling includes a switching-off period.
Referring to fig. 8, fig. 8 shows a schematic diagram of a data flow when the digital power distribution terminal 620 of the present embodiment is in a local control mode and a remote control mode.
When the digital power distribution terminal 620 is in the local control mode, the digital power distribution terminal 620 receives parameters or instructions input by a user through the touch screen 6204 while monitoring electrical data of a low-voltage power distribution circuit where the digital power distribution terminal 620 is located, and in addition, the digital power distribution terminal 620 displays some information through the touch screen 6204. When the digital power distribution terminal 620 receives the control command or parameter input by the user or after analyzing the electrical data, it determines that the circuit breaker 610 needs to be opened or closed, the digital power distribution terminal 620 sends a command to the electric operating mechanism 640, so that the electric operating mechanism 640 controls the circuit breaker 610 to be opened or closed.
If the digital power distribution terminal 620 analyzes that the low voltage power distribution circuit has a fault according to the electrical data and controls the circuit breaker 610 to be opened or closed, the digital power distribution terminal 620 may transmit the fault information to the upper computer 650 through the data collector 630.
When the digital power distribution terminal 620 is in the remote control mode, the digital power distribution terminal 620 monitors the electrical data of the low-voltage power distribution circuit where the digital power distribution terminal 620 is located, and can send the electrical data to the upper computer 650 through the data collector 630, after the upper computer 650 analyzes, a command can be generated and sent to the digital power distribution terminal 620 through the data collector 630, and the digital power distribution terminal 620 controls the electric operating mechanism 640 according to the command, so that the electric operating mechanism drives the circuit breaker 610 to perform switching-off or switching-on.
It will be understood by those skilled in the art that, in the foregoing method of the embodiment of the present invention, the sequence number of each step does not mean that the execution sequence of each step should be determined by the function and internal logic of each step, and should not limit the implementation process of the embodiment of the present invention.
It should be noted that, according to implementation requirements, each component/step described in the embodiments of the present invention may be split into more components/steps, or two or more components/steps or part of operations of the components/steps may be combined into new components/steps, so as to achieve the objects of the embodiments of the present invention.
The above-described methods according to embodiments of the present invention may be implemented in hardware, firmware, or as software or computer code storable in a recording medium such as a CD ROM, RAM, floppy disk, hard disk, or magneto-optical disk, or as computer code originally stored in a remote recording medium or a non-transitory machine-readable medium and to be stored in a local recording medium downloaded through a network, so that the methods described herein may be stored on such software processes on a recording medium using a general purpose computer, special purpose processor, or programmable or special purpose hardware such as an ASIC or FPGA. It is understood that a computer, processor, microprocessor controller, or programmable hardware includes a memory component (e.g., RAM, ROM, flash memory, etc.) that can store or receive software or computer code that, when accessed and executed by the computer, processor, or hardware, implements the low voltage power distribution system control methods described herein. Further, when the general purpose computer accesses code for implementing the low voltage power distribution system control shown herein, execution of the code converts the general purpose computer into a special purpose computer for executing the low voltage power distribution system control shown herein.
Those of ordinary skill in the art will appreciate that the elements and method steps of the examples described in connection with the embodiments disclosed herein can be implemented as electronic hardware, or as a combination of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the embodiments of the present invention.
The above embodiments are only for illustrating the embodiments of the present invention, but not for limiting the embodiments of the present invention, and various changes and modifications may be made by one skilled in the relevant art without departing from the spirit and scope of the embodiments of the present invention, so that all equivalent technical solutions also fall within the scope of the embodiments of the present invention, and the scope of the embodiments of the present invention should be defined by the claims.
Claims (5)
1. A method of controlling a low voltage power distribution system, comprising:
when the digital power distribution terminal of the low-voltage power distribution loop is in a remote control mode, receiving remote information sent by an upper computer through a data acquisition device;
acquiring a control instruction or a parameter for control from the remote information; the control instruction in the remote information is generated by the upper computer according to a switching-off instruction or a switching-on instruction received by a man-machine interaction interface of the upper computer; the parameters for control in the remote information are generated by the upper computer according to the received switching-off time period; according to the control instruction or the parameters for controlling, controlling a breaker connected with the digital power distribution terminal; the controlled circuit breaker comprises a common circuit breaker with opening and closing functions;
the control instruction or the parameter for controlling the remote information is generated by the upper computer according to the instruction or the parameter input by the user, or is generated according to the state of the low-voltage power distribution circuit after the upper computer analyzes the electric data of the low-voltage power distribution circuit;
before the remote information sent by the upper computer is received by the data collector, the method further comprises the following steps:
the data acquisition device is used for transmitting the electrical data of the low-voltage power distribution circuit to the upper computer, and the upper computer judges whether the low-voltage power distribution circuit fails or not according to the electrical information of the low-voltage power distribution equipment; if the low-voltage power distribution loop is determined to have a fault, generating a prompt message for confirming whether the control instruction is generated by the upper computer, and responding to the confirmation operation of the prompt message to generate the control instruction in the remote information;
if the user selects to confirm that the control instruction is generated by the upper computer, the upper computer generates the control instruction in the remote information according to the electrical information of the low-voltage distribution circuit, sends a brake-separating instruction to the digital distribution terminal, and indicates that a breaker corresponding to the low-voltage distribution circuit with a fault is separated for protection;
if the user selects to reject the control command generated by the upper computer, the digital power distribution terminal autonomously controls the circuit breaker, and generates a command for controlling the circuit breaker according to the fault and the fault type of the low-voltage power distribution circuit sent by the upper computer;
and
When a digital power distribution terminal of a low-voltage power distribution loop is in a local control mode, detecting electric data of the low-voltage power distribution loop where the digital power distribution terminal is located;
determining whether the low-voltage distribution circuit fails according to the electrical data of the low-voltage distribution circuit;
if the low-voltage distribution circuit fails, a brake-separating electric signal is sent to the electric operating mechanism, so that the electric operating mechanism drives the connected breaker to separate brake;
when a digital power distribution terminal of a low-voltage power distribution loop is in a local control mode, the digital power distribution terminal receives a control instruction input through a touch screen or parameters for control; the control instruction comprises a brake opening instruction or a brake closing instruction, and the parameters for controlling comprise a brake opening time period; and sending a brake opening electric signal or a brake closing electric signal to a connected electric operating mechanism according to the control instruction or the parameter to control the breaker to open or close.
2. The method of claim 1, wherein the step of determining the position of the substrate comprises,
and controlling the circuit breaker connected with the digital power distribution terminal according to the parameters for controlling, comprising:
determining whether the current time is within the opening time period;
and if the current time is within the opening time period and the connected breaker is not opened, sending an opening electric signal to an electric operating mechanism to open the breaker.
3. The method of claim 2, wherein if the low voltage distribution circuit fails, sending a trip electrical signal to the electric operator to cause the electric operator to drive the associated circuit breaker to trip, the method further comprising:
and sending the information of the low-voltage distribution loop faults to an upper computer through a data acquisition device.
4. The low-voltage power distribution system is characterized by comprising an upper computer, a data acquisition device, a digital power distribution terminal arranged in a low-voltage power distribution loop and a circuit breaker connected with the digital power distribution terminal through an electric operating mechanism; the controlled circuit breaker comprises a common circuit breaker with a switching-off and switching-on function; wherein,
the digital power distribution terminal is connected with the upper computer through the data acquisition device and receives remote information which is remotely transmitted by the upper computer through the data acquisition device, and a control instruction in the remote information is generated by the upper computer according to a switching-off instruction or a switching-on instruction which is received by a man-machine interaction interface of the upper computer; the parameters for control in the remote information are generated by the upper computer according to the received switching-off time period;
when a control instruction or a parameter for control in the remote information indicates to perform opening operation or closing operation, the digital power distribution terminal sends an opening electric signal or a closing electric signal to the electric operating mechanism so that the electric operating mechanism drives the circuit breaker to open or close;
when the digital power distribution terminal of the low-voltage power distribution loop is in a local control mode, detecting electric data of the low-voltage power distribution loop where the digital power distribution terminal is located; determining whether the low-voltage distribution circuit fails according to the electrical data of the low-voltage distribution circuit; if the low-voltage distribution circuit fails, a brake-separating electric signal is sent to the electric operating mechanism, so that the electric operating mechanism drives the connected breaker to separate brake;
the digital power distribution terminal further comprises a touch screen, the touch screen is connected with the central processing unit, information sent by the central processing unit is received and displayed, and/or a control instruction input through the touch screen or a parameter for control is sent to the central processing unit, wherein the control instruction comprises a switching-off instruction or a switching-on instruction, and the parameter for control comprises a switching-off time period;
the control instruction or the parameter for controlling the remote information is generated by the upper computer according to the instruction or the parameter input by the user, or is generated according to the state of the low-voltage power distribution circuit after the upper computer analyzes the electric data of the low-voltage power distribution circuit;
before the remote information sent by the upper computer is received by the data collector, the method used by the system further comprises the following steps: the data acquisition device is used for transmitting the electrical data of the low-voltage power distribution circuit to the upper computer, and the upper computer judges whether the low-voltage power distribution circuit fails or not according to the electrical information of the low-voltage power distribution equipment; if the low-voltage power distribution loop is determined to have a fault, generating a prompt message for confirming whether the control instruction is generated by the upper computer, and responding to the confirmation operation of the prompt message to generate the control instruction in the remote information;
if the user selects to confirm that the control instruction is generated by the upper computer, the upper computer generates the control instruction in the remote information according to the electrical information of the low-voltage distribution circuit, sends a brake-separating instruction to the digital distribution terminal, and indicates that a breaker corresponding to the low-voltage distribution circuit with a fault is separated for protection;
if the user selects to reject the control command generated by the upper computer, the digital power distribution terminal autonomously controls the circuit breaker, and generates a command for controlling the circuit breaker according to the fault and the fault type of the low-voltage power distribution circuit sent by the upper computer.
5. The low voltage power distribution system of claim 4, wherein the digital power distribution terminal comprises a central processor, a communication element;
the central processing unit is connected with the communication element, receives remote information remotely sent by the upper computer through the data acquisition unit through the communication element, and sends an opening electric signal or a closing electric signal to the electric operating mechanism when a control instruction or a parameter for control in the remote information indicates opening operation or closing operation, so that the electric operating mechanism drives the circuit breaker to open or close;
the digital power distribution terminal further includes: the detection element is connected with the central processing unit, detects the electrical data of the low-voltage distribution circuit and sends the electrical data to the central processing unit; the central processing unit is also used for sending the electrical data to the data acquisition unit through the communication element and sending the electrical data to the upper computer through the data acquisition unit.
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| CN109193938A (en) * | 2018-09-28 | 2019-01-11 | 施耐德万高（天津）电气设备有限公司 | A kind of power transfer device control system and control method |
| CN109256778A (en) * | 2018-11-15 | 2019-01-22 | 广东电网有限责任公司韶关供电局 | Power quality treatment method and terminal |
| CN109995142A (en) * | 2019-04-23 | 2019-07-09 | 四川华宇电力有限公司 | It is remotely controlled switching off/on device, system and method |
| CN109995029B (en) * | 2019-04-26 | 2021-02-05 | 武汉汉镇既济电力设备有限公司 | Circuit control method based on circuit breaker |
| CN110011269B (en) * | 2019-04-26 | 2021-05-07 | 武汉汉镇既济电力设备有限公司 | Circuit breaker |
| CN110165785A (en) * | 2019-05-30 | 2019-08-23 | 天津市中力神盾电子科技有限公司 | Power distribution terminal loop name management method and system |
| CN110416969A (en) * | 2019-07-04 | 2019-11-05 | 天津市中力神盾电子科技有限公司 | Method and system for controlling composite switch of distribution box |
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