CN112332402A - Dual-power measurement and control device - Google Patents
Dual-power measurement and control device Download PDFInfo
- Publication number
- CN112332402A CN112332402A CN202010986323.8A CN202010986323A CN112332402A CN 112332402 A CN112332402 A CN 112332402A CN 202010986323 A CN202010986323 A CN 202010986323A CN 112332402 A CN112332402 A CN 112332402A
- Authority
- CN
- China
- Prior art keywords
- unit
- control
- instruction
- power supply
- power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005259 measurement Methods 0.000 title claims abstract description 38
- 230000009977 dual effect Effects 0.000 claims abstract description 20
- 238000012545 processing Methods 0.000 claims abstract description 10
- 230000011664 signaling Effects 0.000 claims description 35
- 230000003993 interaction Effects 0.000 claims description 19
- 238000004891 communication Methods 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 4
- 230000004044 response Effects 0.000 claims description 4
- 238000013461 design Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
-
- 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
- H02J13/00006—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 characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—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 characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The application belongs to distribution equipment design field, in particular to dual supply measurement and control device includes: the analog quantity acquisition unit is used for acquiring preset data in the two power supplies; the CPU control unit is used for receiving the preset data transmitted by the analog quantity acquisition unit, performing preset processing and generating a preset control instruction, wherein the preset control instruction comprises the steps of judging the state of a fuse according to three-phase voltage signals before and after the fuse in each path of power supply and generating a corresponding instruction; the control driving unit is used for carrying out movement control on a corresponding object according to a preset control instruction transmitted by the CPU control unit, wherein the movement control comprises the step of carrying out opening control on a corresponding power circuit breaker according to an opening instruction; and the reliable power supply unit is used for supplying power for the CPU control unit and the control driving unit. The dual-power measurement and control device can meet flexible configuration of various criterion judging conditions, and multi-channel analog quantity side acquisition is added to judge fuse faults, so that reliability of equipment in operation is guaranteed.
Description
Technical Field
The application belongs to the field of power distribution equipment design, and particularly relates to a dual-power measurement and control device.
Background
At present, a two-way (dual-power supply) power supply mode is mostly adopted in a power distribution station room, one way of power supply is used as a main power supply line, the other way of power supply is used as a standby power supply to be used as a backup, and when a main power supply fails or a load is overlarge, the standby power supply is put into use to ensure the normal operation of the load; and in the other power supply mode, each power supply is respectively provided with different loads, and when any one power supply fails, the power supply of the loads can be ensured to be used through the interconnection switch.
For the control of the power supply mode, a PLC is mostly adopted as a core unit, and the local control is carried out by processing switch logic; however, such a control method has at least the following disadvantages:
1) the AC voltage data sampling channel generally only takes one point, the sampling mode can not judge faults like fuse-fusing, and the faults can not be judged by mistake;
2) when the current controller is used in station room power distribution, the automatic control capability of the device is very limited if overload occurs, and reasonable and effective load reduction cannot be carried out;
3) the remote control function is not provided, the local data cannot be communicated with the DTU and other equipment, and remote signaling and remote control information of the dual-power-supply controller is uploaded to the master station in real time;
4) the power quality analysis function of a voltage main incoming line is not provided;
5) the condition judgment and fault pre-judgment of parallel operation (loop closing) of the transformer are not provided.
Disclosure of Invention
In order to solve at least one of the above technical problems, the present application provides a dual power measurement and control device.
The application discloses dual supply measurement and control device for in the dual-circuit power supply mode carry out switching control to two way powers, include:
the analog quantity acquisition unit is used for acquiring preset data in two paths of power supplies, wherein the preset data comprises three-phase voltage signals before and after a fuse in each path of power supply and three-phase current signals of each path of power supply;
the CPU control unit is used for receiving the preset data transmitted by the analog quantity acquisition unit and carrying out preset processing on the preset data to generate a preset control instruction, wherein the CPU control unit judges whether the fuse is in a burnt state or an incoming line power-off state according to three-phase voltage signals in front of and behind the fuse in each circuit of power supply, generates an alarm instruction when the fuse is in the burnt state, and generates an automatic branch incoming line switch control instruction when the fuse is in the incoming line power-off state;
the control driving unit is used for carrying out preset control on a corresponding object according to a preset control instruction transmitted by the CPU control unit, wherein the control driving unit can carry out switching-off control on a corresponding power circuit breaker according to the automatic switching-off line switch control instruction;
and the reliable power supply unit is used as a working power supply for the CPU control unit and the control drive unit and as an operation power supply for opening control.
According to at least one embodiment of the present application, the predetermined data collected by the analog quantity collecting unit further includes analog voltage signals and analog current signals of two power supplies, wherein
The analog quantity acquisition unit can also convert analog voltage and analog current signals into digital signals through a real-time voltage and current transformer acquisition circuit;
the CPU control unit is also used for judging whether the corresponding power supply is overloaded or undervoltage according to the digital voltage signal and the digital current signal transmitted by the analog quantity acquisition unit, generating an automatic branch switch control instruction when the corresponding power supply is overloaded, and generating an alarm instruction when the corresponding power supply is undervoltage.
According to at least one embodiment of the present application, the CPU control unit includes:
the power and electric energy quality calculation module is used for calculating the real-time voltage, current and electric energy quality of the corresponding main incoming line power supply according to the digital voltage signal and the digital current signal; the CPU control unit is also used for comparing the real-time voltage, the current and the power quality with preset voltage, current and power quality, judging whether the real-time voltage, the current and the power quality are in fault, and generating an alarm and locking instruction if the real-time voltage, the current and the power quality are in fault;
and the load shedding judgment module is used for comparing the real-time current with a preset current so as to judge whether the corresponding power supply is overloaded or not and generate an automatic branch line switch control instruction when the power supply is overloaded.
According to at least one embodiment of the present application, the CPU control unit further includes:
the image information generation module is used for generating corresponding image signals from the received data, the internal preset data, the processing result of the corresponding data and the control instruction; wherein
The dual power supply measurement and control device further comprises:
and the human-computer interaction unit is used for carrying out corresponding display according to the image signal transmitted by the CPU control unit.
According to at least one embodiment of the present application, the CPU control unit further includes:
the external instruction response module is used for receiving and responding to an external control instruction to carry out corresponding operation;
the man-machine interaction unit is also used for generating a corresponding external control instruction according to external input and transmitting the external control instruction to the CPU control unit, wherein
The external control instruction at least comprises an adjusting instruction for adjusting the preset values of voltage, current and power quality.
According to at least one embodiment of the present application, the CPU control unit further includes:
the transformer parallel operation parameter calculation module is used for calculating a plurality of parameters related to parallel operation in the corresponding power supply according to the analog voltage signal and the analog current signal acquired by the analog quantity acquisition unit;
the parallel operation condition judgment module is used for judging whether the plurality of parameters meet the corresponding parallel operation conditions;
the parallel operation judgment result generation module is used for generating a prompt instruction capable of parallel operation when all parameters meet the conditions and sending the prompt instruction to the man-machine interaction unit; if one parameter does not meet the condition, generating a prompt instruction incapable of parallel operation, and sending the prompt instruction to the man-machine interaction unit;
and the parallel operation condition selection module is used for controlling the parallel operation condition judgment module to start or close the operation of judging any parameter according to an external control instruction transmitted by the man-machine interaction unit, and the priority of the parallel operation condition selection module is greater than that of the parallel operation condition judgment module.
According to at least one embodiment of the present application, the dual power measurement and control device further comprises:
the switch remote signaling acquisition unit is connected with the CPU control unit, and the CPU control unit can realize remote signaling acquisition through the switch remote signaling acquisition unit and respond to the acquired remote signaling instruction to perform corresponding operation;
the communication unit is connected with the CPU control unit and is used for communicating with external equipment, uploading real-time data to the outside and receiving a remote control command; wherein
The reliable power supply unit is also used for supplying power for the switch remote signaling acquisition unit and the communication unit.
According to at least one embodiment of the application, a photoelectric isolation circuit is arranged in the switch remote signaling acquisition unit, all remote signaling is connected with a passive auxiliary contact of the switch, and all remote signaling adopts a common end.
According to at least one embodiment of the present application, the reliable power supply unit provides a 3.3V dc active circuit for the CPU control unit, a 220V ac active circuit for the control drive unit, a 24V dc active circuit for the switch remote signaling acquisition unit, and a 5V dc active circuit for the communication unit.
According to at least one embodiment of the application, the control driving unit comprises an opening relay and a CPU command conversion circuit, when the control driving unit receives a command, a weak current signal is converted into a 220V strong current signal through the CPU command conversion circuit, and the strong current signal is output to a corresponding external compensation switch or a corresponding circuit breaker through the opening relay.
The application has at least the following beneficial technical effects:
the dual-power measurement and control device can meet flexible configuration of various criterion judging conditions, and multi-channel analog quantity side acquisition is added to judge fuse faults, so that reliability of equipment in operation is guaranteed.
Drawings
FIG. 1 is a topological diagram of a dual power measurement and control device according to the present application;
FIG. 2 is a circuit diagram of a reliable power supply unit in the dual power supply measurement and control device of the present application;
FIG. 3 is a circuit diagram of an analog quantity acquisition circuit in the dual power measurement and control device of the present application;
fig. 4 is a circuit diagram of an optoelectronic isolation circuit in the switch remote signaling acquisition unit of the present application.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are a subset of the embodiments in the present application and not all embodiments in the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
In order to solve at least one problem in the prior art, the application provides a comprehensive dual-power measurement and control device, flexible configuration of various criterion judging conditions is met, and multiple paths of analog quantity side acquisition are added for judging faults such as fuse faults and the like; various communication functions are added, so that the device has the capabilities of remote control, remote signaling and remote measurement; the power quality analysis function is added to the software; the flexible configuration function of the parallel operation condition of the transformer is added, the reliability of the equipment in operation is ensured, and the artificial misoperation is prevented, so that the overall improvement of the intelligent level of the equipment is ensured.
The dual-power measurement and control device of the present application is further described in detail with reference to fig. 1 to 4.
The application discloses dual supply measurement and control device for in the dual supply mode switch control to two way power, as shown in fig. 1, it can include CPU the control unit, analog acquisition unit, control drive unit, reliable electrical unit, switch remote signaling acquisition unit, communication unit and reliable electrical unit.
Specifically, the analog quantity acquisition unit is used for acquiring preset data in the two power supplies, and the preset data can be set appropriately according to needs, and for example, the preset data can include voltage signals, current signals and the like; in order to judge whether the fuse is burnt or not, the preset data at least comprises three-phase voltage signals before and after the fuse in each power supply, and simultaneously can also comprise three-phase current signals of each power supply.
The CPU control unit is used for receiving the preset data transmitted by the analog quantity acquisition unit and carrying out preset processing on the preset data so as to generate a preset control instruction, and the CPU control unit supplies power through the reliable power supply unit; in the embodiment, the CPU control unit can judge whether the voltage signal accords with data according to the three-phase voltage signals before and after the fuse in each circuit of power supply, and judge whether the fuse is burnt out when the voltage signal does not accord with the preset data; specifically, when the voltages before and after the fuse are not equal, the fuse is burnt, and at the moment, the CPU control unit generates an alarm instruction (signal); when the voltages of the front and the rear of the fuse are equal, the incoming line is considered to be in a power-off state (namely, the incoming line is in the power-off state), and at the moment, the CPU control unit generates an automatic branch incoming line switch control instruction (also called a brake opening instruction). It should be noted that, in the conventional judgment of fuse burnout, it is necessary to rely on voltage sampling judgment of a hardware circuit, PT sampling needs to be increased or decreased by comparing voltages U1 and U11 of upper and lower ports of a fuse, and when the upper port of the fuse has no pressure, the fuse is considered to be damaged. In the dual-power measurement and control device, in the operation of the system, under normal conditions, U1 is equal to U11 is equal to 220V, and when U1 is equal to 220V and U11 is equal to 0V, it is determined that the fuse is burnt out, and an alarm instruction is generated; and when the voltage before and after the fuse is equal to zero, the U1 is 0V, and the U11 is 0V, the incoming line is considered to be power-off, and an automatic branch line switch control command is generated.
The control driving unit can be used for carrying out movement control on a corresponding object according to a preset control instruction transmitted by the CPU control unit, and the control driving unit also supplies power through the reliable power supply unit which is also used as an operation power supply for opening control; in this embodiment, the control drive unit can carry out the opening control to corresponding power circuit breaker according to the opening instruction. In conclusion, the multi-channel analog quantity side acquisition is added to judge the fuse fault, the fuse burnout is judged to give an alarm, or the switching-off control is carried out through the control driving unit when the fuse is in the condition of line incoming and power loss, so that the reliability of the equipment in the operation is ensured.
In this embodiment, the control driving unit preferably includes an open relay and a CPU command conversion circuit, and when the control driving unit receives a command, the CPU command conversion circuit converts the weak current signal into a 220V strong current signal, and the weak current signal is output to the corresponding external compensation switch or circuit breaker by the open relay.
Furthermore, the preset data acquired by the analog quantity acquisition unit can also comprise analog voltage signals and analog current signals of two paths of power supplies; at this time, the analog quantity acquisition unit is also configured to convert the analog voltage and current signals into digital signals (through AD calculation) through the real-time voltage and current transformer acquisition circuit; the configuration enables the analog quantity acquisition unit to realize the work of calculating the quality of the local analysis electric energy in place, thereby reducing the working pressure of a CPU.
CPU control unit through I2The communication with the analog quantity acquisition unit is realized in a C bus mode, so that real-time data of voltage, current and electric energy quality are provided for the whole system; as shown in fig. 3, in the analog quantity acquisition circuit, 3 currents of 6 voltages are respectively acquired at one incoming line, 3 currents of 6 voltages are acquired at the two incoming lines, and 3 currents are acquired by the bus coupler cabinet.
Aiming at the digital voltage signal and the digital current signal transmitted by the analog quantity acquisition unit, the CPU control unit can judge whether the corresponding power supply is overloaded or undervoltage, generates an automatic branch switch control instruction when the corresponding power supply is overloaded, and generates an alarm instruction when the corresponding power supply is undervoltage, so that intelligent load shedding operation is realized, and the safety of the transformer is ensured.
Specifically, for the load shedding judgment, the CPU control unit of the present application may further include a power and power quality calculation module and a load shedding judgment module.
The power and electric energy quality calculation module is used for calculating real-time voltage, current and electric energy quality of the corresponding main incoming line power supply according to the digital voltage signal and the digital current signal; at the moment, the CPU control unit is also used for comparing the real-time voltage, current and power quality with preset voltage, current and power quality, judging whether the real-time voltage, current and power quality are in fault, and if the real-time voltage, current and power quality are in fault, generating an alarm and locking instruction; the load shedding judgment module is used for comparing the real-time current with the preset current so as to judge whether the corresponding power supply is overloaded or not and generate an automatic branch line switch control instruction when the power supply is overloaded.
Further, in the dual-power measurement and control device of the application, the CPU control unit may further include an image information generation module; the image information generation module is used for generating corresponding image signals from the received data, the internal preset data, the processing result of the corresponding data and the control instruction; the received data comprise voltage, current and the like, the internal preset data comprise undervoltage fixed values, deloading fixed values and the like, the processing result of the corresponding data comprises a result of judging whether the fuse is burnt out or not, whether the power supply is overloaded or undervoltage or not and an alarm instruction, and the control instruction comprises an external input parameter, an external control instruction and the like.
Correspondingly, the dual-power measurement and control device can also comprise a human-computer interaction unit; the man-machine interaction unit may include, for example, a display screen (including a liquid crystal display screen), and an operation key, and the liquid crystal screen may implement setting of a fixed value of the control unit, retrieving of real-time data, querying of historical events, and the like.
Further, in the dual-power measurement and control device, the CPU control unit can also comprise an external instruction response module; the external instruction response module is used for receiving and responding to an external control instruction to carry out corresponding operation; at the moment, the man-machine interaction unit is also used for generating a corresponding external control instruction according to external input and transmitting the external control instruction to the CPU control unit; the external control instruction at least comprises an adjusting instruction for adjusting the preset voltage, current and electric energy quality values, namely, the condition for judging whether the power supply is overloaded or undervoltage can be adjusted manually through (an operation key of) the human-computer interaction unit according to the requirement.
In addition, when the dual-power system operates, the transformers need to be operated in parallel (closed loop) at the low-voltage side for ensuring the maintenance of the transformers without power outage, and at the moment, in order to ensure the life safety and equipment safety of operators, the dual-power measurement and control device of the application is added with a self-detection and judgment function of the parallel operation condition of the transformers, and when the quality of two paths of power supplies does not meet the parallel condition, the measurement and control device locks a switching-on function of a switch, so that the parallel operation of the transformers is forbidden to ensure the safety of the; meanwhile, in order to ensure the reasonable application of the function and the flexible use under specific conditions, the conditional starting and stopping functions of forbidding the parallel operation (loop closing) of the transformers are specially arranged.
Specifically, in the dual power measurement and control device of the present application, the CPU control unit may further include a transformer parallel operation (also called transformer loop closing) parameter calculation module, a parallel operation condition judgment module, a parallel operation judgment result generation module, and a parallel operation condition selection module.
The transformer parallel operation parameter calculation module is used for calculating a plurality of parameters related to parallel operation in the corresponding power supply according to the analog voltage signal and the analog current signal acquired by the analog quantity acquisition unit; the parameters related to the parallel operation may be appropriately selected according to specific needs, and in this embodiment, the parameters may include a phase value, a voltage value, a current value, and a load value.
The parallel operation condition judgment module is used for judging whether the plurality of parameters meet the corresponding parallel operation conditions; the phase value comprises phase judgment and phase lack judgment, the voltage value comprises non-voltage judgment and over-voltage and under-voltage judgment, the current value comprises over-current judgment, and the load value comprises overload judgment.
The parallel operation judgment result generation module is used for generating a prompt instruction capable of parallel operation when all parameters meet the conditions and sending the prompt instruction to the man-machine interaction unit for displaying; if one parameter does not meet the condition, generating a prompt instruction incapable of parallel operation, and sending the prompt instruction to the human-computer interaction unit for displaying; at this time, the operator can manually judge whether to perform the parallel operation of the transformers by taking the display result as a guide. Correspondingly, in an embodiment, an operator may input an external operation instruction for parallel operation of the transformer to the CPU control unit through the human-computer interaction unit, and the CPU control unit transmits the corresponding operation instruction to the control driving unit to perform corresponding parallel operation of the transformer after processing the operation instruction, which is not described in detail herein.
The parallel operation condition selection module is used for controlling the parallel operation condition judgment module to start or close the operation of judging any parameter according to an external control instruction transmitted by the man-machine interaction unit, and the priority of the parallel operation condition selection module is greater than that of the parallel operation condition judgment module. That is, under certain environmental conditions, an operator can manually turn on or off a certain condition of the parallel operation (loop closing) of the transformer even if the parameter under the condition is not satisfied in the last judgment.
Further, the dual-power measurement and control device of the application can further comprise a switch remote signaling acquisition unit and a communication unit.
The switch remote signaling acquisition unit is connected with the CPU control unit, and the CPU control unit can realize remote signaling acquisition through the switch remote signaling acquisition unit and respond to the acquired remote signaling instruction to perform corresponding operation; specifically, the switch remote signaling acquisition unit is internally provided with a photoelectric isolation circuit, all remote signaling is connected with a passive auxiliary contact of the switch, all remote signaling adopts a common end, and when the remote signaling auxiliary contact of the switch is displaced, the CPU control unit realizes remote signaling acquisition by scanning remote signaling I/O.
The communication unit is connected with the CPU control unit and is used for communicating with external equipment, uploading real-time data to the outside and receiving remote control commands; specifically, the communication unit comprises a serial port communication circuit RS-485/232 and an Ethernet communication circuit, and is used for communicating with external equipment (such as a DTU), uploading real-time data to the outside and receiving remote control commands, so as to realize the three-remote function of the master station; in addition, dual supply measurement and control device itself can also possess the SMS alarming function, provides the convenient mode of remote monitoring switch for the operation personnel.
Furthermore, the reliable power supply unit is also used for supplying power for the switch remote signaling acquisition unit and the communication unit; moreover, the reliable power supply unit can provide uninterrupted reliable direct current working power supply and alternating current control power supply for different objects, and the device can reliably work under the condition that any incoming line has the power supply; specifically, the reliable power supply unit can provide a 3.3V direct current active circuit for the CPU control unit, can provide a 220V alternating current active circuit for the control drive unit, can provide a 24V direct current active circuit for the switch remote signaling acquisition unit, and can provide a 5V direct current active circuit for the communication unit.
Further, in another embodiment of dual supply measurement and control device of this application, for the maloperation does not appear when guaranteeing the device trouble, the trouble shutting logic that the device could be relieved to manual position has still been increased and decreased, just can relieve the shutting with the device in manual state promptly, when relieving the shutting in non-manual position, can indicate the operation suggestion of "please make the hand (hold) to the manual position unblock again" on the human-computer interaction unit to can prevent that fortune dimension personnel from unblock this controlling means under automatic mode, the automatic deciliter switch appears danger, effectual fortune dimension personnel's maloperation action of avoiding.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a dual supply measurement and control device for switch control is carried out two way power to in double-circuit power supply mode, its characterized in that includes:
the analog quantity acquisition unit is used for acquiring preset data in two paths of power supplies, wherein the preset data comprises three-phase voltage signals before and after a fuse in each path of power supply and three-phase current signals of each path of power supply;
the CPU control unit is used for receiving the preset data transmitted by the analog quantity acquisition unit and carrying out preset processing on the preset data to generate a preset control instruction, wherein the CPU control unit judges whether the fuse is in a burnt state or an incoming line power-off state according to three-phase voltage signals in front of and behind the fuse in each circuit of power supply, generates an alarm instruction when the fuse is in the burnt state, and generates an automatic branch incoming line switch control instruction when the fuse is in the incoming line power-off state;
the control driving unit is used for carrying out preset control on a corresponding object according to a preset control instruction transmitted by the CPU control unit, wherein the control driving unit can carry out switching-off control on a corresponding power circuit breaker according to the automatic switching-off line switch control instruction;
and the reliable power supply unit is used as a working power supply for the CPU control unit and the control drive unit and as an operation power supply for opening control.
2. The dual-power measurement and control device of claim 1, wherein the predetermined data collected by the analog quantity collecting unit further comprises analog voltage signals and analog current signals of two power sources, wherein
The analog quantity acquisition unit can also convert analog voltage and analog current signals into digital signals through a real-time voltage and current transformer acquisition circuit;
the CPU control unit is also used for judging whether the corresponding power supply is overloaded or undervoltage according to the digital voltage signal and the digital current signal transmitted by the analog quantity acquisition unit, generating an automatic branch switch control instruction when the corresponding power supply is overloaded, and generating an alarm instruction when the corresponding power supply is undervoltage.
3. The dual supply measurement and control device of claim 2, wherein the CPU control unit comprises:
the power and electric energy quality calculation module is used for calculating the real-time voltage, current and electric energy quality of the corresponding main incoming line power supply according to the digital voltage signal and the digital current signal; the CPU control unit is also used for comparing the real-time voltage, the current and the power quality with preset voltage, current and power quality, judging whether the real-time voltage, the current and the power quality are in fault, and generating an alarm and locking instruction if the real-time voltage, the current and the power quality are in fault;
and the load shedding judgment module is used for comparing the real-time current with a preset current so as to judge whether the corresponding power supply is overloaded or not and generate an automatic branch line switch control instruction when the power supply is overloaded.
4. The dual supply measurement and control device of claim 3, wherein the CPU control unit further comprises:
the image information generation module is used for generating corresponding image signals from the received data, the internal preset data, the processing result of the corresponding data and the control instruction; wherein
The dual power supply measurement and control device further comprises:
and the human-computer interaction unit is used for carrying out corresponding display according to the image signal transmitted by the CPU control unit.
5. The dual supply measurement and control device of claim 4, wherein the CPU control unit further comprises:
the external instruction response module is used for receiving and responding to an external control instruction to carry out corresponding operation;
the man-machine interaction unit is also used for generating a corresponding external control instruction according to external input and transmitting the external control instruction to the CPU control unit, wherein
The external control instruction at least comprises an adjusting instruction for adjusting the preset values of voltage, current and power quality.
6. The dual supply measurement and control device of claim 5, wherein the CPU control unit further comprises:
the transformer parallel operation parameter calculation module is used for calculating a plurality of parameters related to parallel operation in the corresponding power supply according to the analog voltage signal and the analog current signal acquired by the analog quantity acquisition unit;
the parallel operation condition judgment module is used for judging whether the plurality of parameters meet the corresponding parallel operation conditions;
the parallel operation judgment result generation module is used for generating a prompt instruction capable of parallel operation when all parameters meet the conditions and sending the prompt instruction to the man-machine interaction unit; if one parameter does not meet the condition, generating a prompt instruction incapable of parallel operation, and sending the prompt instruction to the man-machine interaction unit;
and the parallel operation condition selection module is used for controlling the parallel operation condition judgment module to start or close the operation of judging any parameter according to an external control instruction transmitted by the man-machine interaction unit, and the priority of the parallel operation condition selection module is greater than that of the parallel operation condition judgment module.
7. The dual supply measurement and control device of claim 1, further comprising:
the switch remote signaling acquisition unit is connected with the CPU control unit, and the CPU control unit can realize remote signaling acquisition through the switch remote signaling acquisition unit and respond to the acquired remote signaling instruction to perform corresponding operation;
the communication unit is connected with the CPU control unit and is used for communicating with external equipment, uploading real-time data to the outside and receiving a remote control command; wherein
The reliable power supply unit is also used for supplying power for the switch remote signaling acquisition unit and the communication unit.
8. The dual-power measurement and control device of claim 7, wherein the switch remote signaling collection unit is provided with a photoelectric isolation circuit, all remote signaling is connected to a passive auxiliary contact of the switch, and all remote signaling uses a common terminal.
9. The dual-power measurement and control device of claim 7, wherein the reliable power supply unit provides a 3.3V DC active circuit for the CPU control unit, a 220V AC active circuit for the control drive unit, a 24V DC active circuit for the switch remote signaling acquisition unit, and a 5V DC active circuit for the communication unit.
10. The dual-power measurement and control device of claim 1, wherein the control driving unit comprises an open relay and a CPU command conversion circuit, and when the control driving unit receives a command, the CPU command conversion circuit converts a weak current signal into a 220V strong current signal, and the strong current signal is output to a corresponding external supplementary switch or circuit breaker by the open relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010986323.8A CN112332402A (en) | 2020-09-18 | 2020-09-18 | Dual-power measurement and control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010986323.8A CN112332402A (en) | 2020-09-18 | 2020-09-18 | Dual-power measurement and control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112332402A true CN112332402A (en) | 2021-02-05 |
Family
ID=74303139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010986323.8A Pending CN112332402A (en) | 2020-09-18 | 2020-09-18 | Dual-power measurement and control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112332402A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113485194A (en) * | 2021-07-20 | 2021-10-08 | 北京四方继保工程技术有限公司 | Remote signaling acquisition circuit for power distribution device and control method |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2265018Y (en) * | 1996-01-24 | 1997-10-15 | 柳州市鱼峰区建英五金丝钉厂 | Phase interruption protector for three-phase motor |
| FI20040973A0 (en) * | 2004-07-12 | 2004-07-12 | Kone Corp | Power supply as energy saver for elevator system and reserve power supply |
| CN201174621Y (en) * | 2008-03-28 | 2008-12-31 | 宁波天安（集团）股份有限公司 | Automatic switching control apparatus of double power supply |
| CN201191712Y (en) * | 2008-04-14 | 2009-02-04 | 深圳市深泰明科技有限公司 | Low voltage AC cabinet for touching integrated intelligent transforming plant |
| CN101369739A (en) * | 2008-09-28 | 2009-02-18 | 上海宝钢化工有限公司 | Spare power automatic switching device and method for three-segment bus two-segment switch |
| CN102664465A (en) * | 2012-05-21 | 2012-09-12 | 浙江正泰电器股份有限公司 | Breaker controller with dual-power-source switching function, switching system and switching method |
| CN203025297U (en) * | 2012-12-26 | 2013-06-26 | 北京思源清能电气电子有限公司 | Return contact-free fuse blow detection circuit |
| CN104319890A (en) * | 2014-10-31 | 2015-01-28 | 国家电网公司 | Intelligent low-voltage load automatic transfer control device and control method thereof |
| CN109119964A (en) * | 2018-10-29 | 2019-01-01 | 国网辽宁省电力有限公司沈阳供电公司 | Prevent the intelligent controller of switch trip coil burnout |
| CN109830958A (en) * | 2019-03-27 | 2019-05-31 | 国网北京市电力公司 | Dual power supply measure and control device and load access management system |
| CN209896694U (en) * | 2019-02-27 | 2020-01-03 | 镇江达舟船舶制造有限公司 | Shipborne low-voltage shore power box |
-
2020
- 2020-09-18 CN CN202010986323.8A patent/CN112332402A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2265018Y (en) * | 1996-01-24 | 1997-10-15 | 柳州市鱼峰区建英五金丝钉厂 | Phase interruption protector for three-phase motor |
| FI20040973A0 (en) * | 2004-07-12 | 2004-07-12 | Kone Corp | Power supply as energy saver for elevator system and reserve power supply |
| CN201174621Y (en) * | 2008-03-28 | 2008-12-31 | 宁波天安（集团）股份有限公司 | Automatic switching control apparatus of double power supply |
| CN201191712Y (en) * | 2008-04-14 | 2009-02-04 | 深圳市深泰明科技有限公司 | Low voltage AC cabinet for touching integrated intelligent transforming plant |
| CN101369739A (en) * | 2008-09-28 | 2009-02-18 | 上海宝钢化工有限公司 | Spare power automatic switching device and method for three-segment bus two-segment switch |
| CN102664465A (en) * | 2012-05-21 | 2012-09-12 | 浙江正泰电器股份有限公司 | Breaker controller with dual-power-source switching function, switching system and switching method |
| CN203025297U (en) * | 2012-12-26 | 2013-06-26 | 北京思源清能电气电子有限公司 | Return contact-free fuse blow detection circuit |
| CN104319890A (en) * | 2014-10-31 | 2015-01-28 | 国家电网公司 | Intelligent low-voltage load automatic transfer control device and control method thereof |
| CN109119964A (en) * | 2018-10-29 | 2019-01-01 | 国网辽宁省电力有限公司沈阳供电公司 | Prevent the intelligent controller of switch trip coil burnout |
| CN209896694U (en) * | 2019-02-27 | 2020-01-03 | 镇江达舟船舶制造有限公司 | Shipborne low-voltage shore power box |
| CN109830958A (en) * | 2019-03-27 | 2019-05-31 | 国网北京市电力公司 | Dual power supply measure and control device and load access management system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113485194A (en) * | 2021-07-20 | 2021-10-08 | 北京四方继保工程技术有限公司 | Remote signaling acquisition circuit for power distribution device and control method |
| CN113485194B (en) * | 2021-07-20 | 2022-09-30 | 北京四方继保工程技术有限公司 | Remote signaling acquisition circuit for power distribution device and control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202059185U (en) | Micro grid on-grid and off-grid control apparatus | |
| CN102664465B (en) | Breaker controller with dual-power-source switching function, switching system and switching method | |
| CN108565974B (en) | Self-powered remote failure protection method and system based on protection device | |
| CN104917289A (en) | Automatic switching method for emergency power supply and two-way working power supplies of diesel generator | |
| CN112072775B (en) | Single spare power automatic switching system adaptive to 10kV bus operation mode | |
| CN110932395B (en) | Communication system of low-voltage intelligent spare power automatic switching | |
| CN201360178Y (en) | Intelligent controller of low-voltage distribution system | |
| CN112332402A (en) | Dual-power measurement and control device | |
| CN110138076B (en) | Two-incoming-line one-bus-connection automatic switching control system and method | |
| CN201156680Y (en) | Automatic throw-in equipment of adaptive standby power supply | |
| CN202696279U (en) | Circuit breaker controller with dual-power changeover function and dual-power switching system | |
| CN203071647U (en) | Low-voltage switch cabinet automatic input and recovery device | |
| CN112467721A (en) | Three-power-supply power supply system control device | |
| CN211930338U (en) | Remote intelligent monitoring system for power supply control power supply | |
| CN210111610U (en) | Automatic voltage regulating device for three-phase distribution line | |
| An et al. | Development of a smart low voltage circuit breaker with integrated protection and control functions based on wireless communications | |
| CN114123497A (en) | Intelligent bus-tie monitoring device of low-voltage direct-current power supply system for station and control method | |
| CN212323734U (en) | Manual and automatic integrated switching device and voltage switching control mode switching circuit for railway traction substation | |
| CN210123892U (en) | Low-voltage interconnection switch box | |
| CN217983231U (en) | Cloud distribution intelligent circuit breaker | |
| CN213517962U (en) | Low-voltage wire transfer interconnection system of power plant | |
| CN217010435U (en) | Direct current monitoring device and transformer substation monitoring system | |
| CN220087006U (en) | Railway digital main transformer backup power automatic switching system | |
| CN112271719A (en) | Generator controller | |
| CN111917104B (en) | Circuit for preventing misoperation of bus voltage parallel circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210205 |