CN217133339U - Multifunctional test power supply based on ZigBee Internet of things technology - Google Patents
Multifunctional test power supply based on ZigBee Internet of things technology Download PDFInfo
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- CN217133339U CN217133339U CN202220806380.8U CN202220806380U CN217133339U CN 217133339 U CN217133339 U CN 217133339U CN 202220806380 U CN202220806380 U CN 202220806380U CN 217133339 U CN217133339 U CN 217133339U
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Abstract
本实用新型提供了一种基于ZigBee物联网技术的多功能试验电源，包括信息处理中心和手持器，其中信息处理中心设置有微型直流系统试验单元，通过控制微型直流系统试验单元可以向新投入的设备提供所需的试验电源。与此同时，信息处理中心还可通过手持器获取的接地数据判断接地故障信息，从而可以在新设备投运前测试的过程中同时对设备的二次回路绝缘状态进行检测，解决了现有变电站调试试验电源和便携式直流试验电源都是无绝缘监控的电源，新投入设备二次机构安装接线导致接地或者交流串入直流，作业过程导致接地故障，调试过程没能有效监控，给电力系统厂站运行直流系统下的保护、断路器带来巨大安全隐患的问题。
The utility model provides a multifunctional test power supply based on the ZigBee Internet of Things technology, including an information processing center and a hand-held device, wherein the information processing center is provided with a micro-DC system test unit, and the micro-DC system test unit can be controlled by The equipment provides the required test power supply. At the same time, the information processing center can also judge the ground fault information through the grounding data obtained by the hand-held device, so that the insulation state of the secondary circuit of the equipment can be detected at the same time during the test before the new equipment is put into operation, which solves the problem of the existing substation. The commissioning test power supply and the portable DC test power supply are both power sources without insulation monitoring. The installation and wiring of the secondary mechanism of the newly invested equipment leads to grounding or the AC is connected to the DC. The operation process causes a grounding fault. The protection and circuit breakers under the operation of the DC system bring huge security risks.
Description
Technical Field
The utility model belongs to the technical field of power electronics, concretely relates to multi-functional test power based on zigBee internet of things.
Background
The DC system is used in hydraulic power plant, thermal power plant, various transformer substations and other users using DC equipment, and is used as power supply equipment for providing DC power supply for signal equipment, protection, automatic equipment, emergency lighting, emergency power supply and breaker opening and closing operation. In order to ensure safe and reliable operation of primary equipment, a direct current system for a transformer substation is designed into an ungrounded system, only one artificial grounding point is allowed in normal operation, and the regulation clearly requires that the direct current system for the transformer substation has one grounding point. When the transformer substation is technically improved or expanded, newly-delivered direct current load equipment needs to be debugged, and a fault may occur in the debugging process, so that a debugging test power supply or a portable direct current test power supply of a common transformer substation is used as a power supply of the newly-delivered direct current load equipment. The transformer substation debugging test power supply and the portable direct current test power supply are both power supplies without insulation monitoring, the newly-input equipment secondary mechanism mounting wiring leads to grounding or alternating current is connected in series with direct current, the operation process leads to grounding failure, and the debugging process cannot be effectively monitored; the newly-thrown equipment has normal functions but the loop with insulation fault is connected into the running direct current system to run, so that huge potential safety hazards are brought to the protection and the circuit breaker under the running direct current system of the power system station.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model discloses aim at solving current transformer substation's debugging test power and portable direct current test power and all be the power of no insulation control, newly drop into equipment fixing connection and lead to ground connection or action process to lead to ground fault debugging process to not effectively monitor, bring the problem of huge potential safety hazard for the protection under the operation direct current system.
In order to solve the technical problem, the utility model provides a following technical scheme:
the utility model provides a multi-functional test power based on zigBee internet of things, include: an information processing center and a handset;
the information processing center is connected with the handset through a wireless network;
the information processing center is provided with a miniature direct current system test unit, and the miniature direct current system test unit provides required test power supply for newly-input equipment under the control of the information processing center.
Further, the information processing center further includes: a coordinator;
and the information processing center establishes wireless network connection with the handheld device through the coordinator, and the wireless network connection is a ZigBee-based wireless sensor network.
Further, the information processing center further includes: a central processing unit;
the central processing unit is respectively connected with the miniature direct current system test unit and the coordinator.
Further, the information processing center further includes: the device comprises a display, a serial port communication module, an external memory and a clock circuit;
the display, the serial port communication module, the clock circuit and the external memory are all connected with the central processing unit.
Further, the handset specifically comprises: the device comprises an antenna circuit, a processing chip and a current detection circuit;
the antenna circuit and the current detection circuit are respectively connected with the processing chip;
the antenna circuit is connected with the information processing center through a ZigBee wireless sensing network.
Further, the handset further comprises: the voice prompt circuit, the display module and the storage battery are arranged;
the voice prompt circuit, the display module and the storage battery are respectively connected with the processing chip.
To sum up, the utility model provides a many functional test power based on zigBee internet of things, including information processing center and handheld ware, wherein information processing center is provided with miniature direct current system test unit, can provide required experimental power to the equipment that newly drops into through controlling miniature direct current system test unit. Meanwhile, the information processing center can also judge the grounding fault information through the grounding data acquired by the handheld device, so that the insulation state of a secondary circuit of the equipment can be detected simultaneously in the process of testing before the new equipment is put into operation, and the problems that the existing transformer substation debugging test power supply and the portable direct current test power supply are power supplies without insulation monitoring, the installation wiring of a secondary mechanism of the newly-input equipment leads to grounding or alternating current to be connected in series with direct current, the operation process leads to grounding fault, the debugging process cannot be effectively monitored, and huge potential safety hazards are brought to the protection and the circuit breaker under the direct current system of the power system station operation are solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic block diagram of a multifunctional test power supply based on the ZigBee internet of things technology provided by an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an information processing center according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a testing unit of a micro dc system according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a handset according to an embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention are clearly and completely described with reference to the drawings in the embodiments of the present invention, and obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The DC system is used in hydraulic power plant, thermal power plant, various transformer substations and other users using DC equipment, and is used as power supply equipment for providing DC power supply for signal equipment, protection, automatic equipment, emergency lighting, emergency power supply and breaker opening and closing operation. In order to ensure safe and reliable operation of primary equipment, a direct current system for a transformer substation is designed into an ungrounded system, only one artificial grounding point is allowed in normal operation, and the regulation clearly requires that the direct current system for the transformer substation has one grounding point. When the transformer substation is technically improved or expanded, newly-delivered direct current load equipment needs to be debugged, and a fault may occur in the debugging process, so that a debugging test power supply or a portable direct current test power supply of a common transformer substation is used as a power supply of the newly-delivered direct current load equipment. The transformer substation debugging test power supply and the portable direct current test power supply are both power supplies without insulation monitoring, the newly-input equipment secondary mechanism mounting wiring leads to grounding or alternating current is connected in series with direct current, the operation process leads to grounding failure, and the debugging process cannot be effectively monitored; the newly-thrown equipment has normal functions but the loop with insulation fault is connected into the running direct current system to run, so that huge potential safety hazards are brought to the protection and the circuit breaker under the running direct current system of the power system station.
According to market research data, the equipment in the market has the problem of too single function, for example, a direct current test power supply only serves to provide a standard direct current source, an AC/DC electric energy module is mainly adopted to convert alternating current into direct current, and the technology is mature; in the aspect of insulation monitoring, the method is applied to direct-current online insulation monitoring, and the monitoring principle of combining a balance bridge and an unbalanced bridge is adopted generally, so that only branch line selection alarm can be performed; the insulation searching aspect mainly uses a direct current grounding searching instrument, the instrument currently uses a signal method principle, and the equipment is only used for searching a specific grounding fault point. Then, according to one current industry situation, similar devices exist today with very obvious short panels.
The equipment for testing the new direct current equipment before commissioning is mainly a direct current test power supply, but an operator cannot judge whether the insulation state of a secondary circuit of the equipment is normal or not in real time, so that great potential safety hazards exist. In order to solve the problem that the secondary circuit of new equipment is normally insulated before commissioning, an online insulation monitoring device and an earth fault finder are required to be configured. Therefore, the equipment cost is directly increased, and in addition, in the test process, because 3 pieces of equipment are involved, the wiring is more, and the efficiency is influenced.
Based on this, the utility model provides a many function test power based on zigBee internet of things.
It is right below the utility model discloses a detailed introduction that is gone on to the embodiment of a multi-functional test power based on zigBee internet of things.
Referring to fig. 1, the present embodiment provides a multifunctional test power supply based on a ZigBee internet of things technology, including: an information processing centre and a handset.
In this embodiment, the handset is used to obtain the ground data of the secondary loop.
It should be noted that, as shown in fig. 4, the hardware portion of the handset is a processing chip (e.g. CC2530) as a core processor, and mainly includes two portions, namely an antenna circuit and a current detection circuit.
The antenna circuit is used for establishing ZigBee wireless sensing network connection with the information processing center so as to transmit grounding data detected by the handset. The antenna circuit can be realized by adopting a power amplification chip, and can realize wireless transmission at a distance of 400 m.
The current detection circuit is used for detecting the grounding data of the secondary loop. The method is mainly realized through a pincerlike mutual inductor, and the detected grounding data comprises signal current waveforms and grounding resistance obtained through corresponding calculation.
The processing chip is used for converting the grounding data into digital signals and transmitting the digital signals to the information processing center through the antenna circuit. Specifically, a CC2530 chip can be selected, 8 paths of high-resolution analog-to-digital converters are arranged in the chip, and a small number of sampling circuits are matched to realize signal acquisition and conversion.
Besides, the hand-held device is also provided with a voice prompt circuit, a display module and a storage battery.
The voice prompt circuit is used for sending grounding information according to the grounding data; the display module is used for displaying signal current waveforms and grounding resistance values; the battery is used to provide an internal power supply for the handset.
In practical use, the handset searches from a ground fault branch to a load end, during the searching, a signal current waveform is detected and a ground resistance is calculated, the signal current waveform is transmitted to a multifunctional test power supply host (namely an information processing center) in real time, the positive electrode/negative electrode of the handset is grounded through voice prompt, and when the handset crosses a specific ground fault point, the handset cannot detect the signal current waveform and voice prompt is carried out on no ground. At this time, a specific grounding fault point can be found in the process from grounding to non-grounding.
In this embodiment, a ZigBee wireless sensor network connection is established between the information processing center and the handset, and is used to determine a fault point according to the grounding data.
It should be noted that, in order to implement the test of the new commissioning device and perform the insulation detection on the secondary circuit, the information processing center needs to work in cooperation with the handset. Since the handset needs to move to find out a fault point, in order to realize information interaction between the information processing center and the handset, the embodiment adopts a wireless connection mode based on the ZigBee internet of things technology.
In this embodiment, the information processing center is provided with a micro dc system test unit, and the micro dc system test unit provides a required test power supply to the newly-input device under the control of the information processing center.
As shown in fig. 2, the information processing center is provided with a coordinator. The information processing center is connected with the handheld device through a ZigBee wireless sensing network established between the coordinator and the handheld device. The information processing center establishes ZigBee wireless sensing network connection with the handset through the coordinator in two modes. One is that the coordinator and the handset directly establish ZigBee wireless sensing network connection, which is suitable for being used when the distance between the handset and the information processing center is close; and secondly, the coordinator establishes ZigBee wireless sensing network connection with the handset through the router, and is suitable for being used when the distance between the handset and the information processing center is long.
Further, the information processing center also comprises a central processing unit.
The central processing unit is respectively connected with the micro direct current system test unit and the coordinator, and is used for controlling the micro direct current system test unit to output a set voltage and acquiring grounding data through the coordinator and judging a fault point according to the grounding data. The central processing is used as a core unit of data processing, is mainly born by STM32F103ZET6 with high cost performance, has the working frequency of 72MHz, has a portable real-time operating system and a universal file system module, and can easily perform various kinds of data processing. The system realizes the functions of data processing and displaying, information storage, instruction sending and receiving and the like. Each network has one and only one coordinator node, and is mainly used for realizing information exchange between the coordinator and the central processor.
In addition, the information processing center includes: the device comprises a display, a serial port communication module, an external memory and a clock circuit.
The display is used for carrying out human-computer interaction, and the setting voltage that needs to be output is obtained and sent to central processing unit according to operating personnel's instruction to the setting voltage that needs to be output, so that the miniature direct current system test unit of setting voltage control that central processing unit exported according to needs exports. The display adopts a graphic support system, combines the functions of touch screen operation, color display and the like, and enables the display and the operation to be more humanized.
The serial port communication module is used for realizing wired communication connection between the central processing unit and the coordinator. The data mutual transmission between the central processing unit and the ZigBee coordinator is completed by mainly adopting a power supply conversion chip designed by an RS232 standard serial port, so that the wired communication between the multifunctional test power supply and the wireless sensing network is realized.
The clock circuit is used for providing real-time for the central processing unit. The part adopts a low-power consumption clock chip to provide real-time for the system, thereby achieving the purpose of synchronously recording the ground fault data and the current time.
The external memory is used for storing the ground fault data and the generation time of the fault data, and the ground fault data and the corresponding time are generated by the data and the real-time obtained when the central processing unit judges the fault point according to the ground fault data. The central processing unit realizes the local backup of the working information of each unit by mounting an external memory, and a worker can look up the working state of the relevant node through the backup so as to carry out targeted maintenance.
It is worth noting that the miniature direct current system test unit is mainly used for simulating a direct current system and also plays a role of a test power supply of new commissioning equipment. Which may employ existing schemes. As shown in fig. 3, the working principle of the miniature dc system test unit is that 220V ac input is rectified by a switching power supply module and controlled by a central processing unit, and then the rectified ac voltage is output on a KM1 bus, and 110V or 220V dc voltage can be output for providing test power for new commissioning equipment, 1I-section balance bridge resistor and 1I-section switching bridge resistor are configured on a KM1 bus, and 1 II-section balance bridge resistor is configured on a KM2 bus. The I section balance bridge resistor, the I section switching bridge resistor and the II section balance bridge resistor are matched to realize insulation monitoring, resistance calculation, grounding search and looped network search.
The embodiment provides a multi-functional test power supply based on zigBee internet of things, including information processing center and handheld ware, wherein information processing center is provided with miniature direct current system test unit, can provide required test power supply to the equipment of newly-investing through controlling miniature direct current system test unit. Meanwhile, the information processing center can also judge the grounding fault information through the grounding data acquired by the handset, so that the insulation state of the secondary circuit of the equipment can be detected simultaneously in the process of testing before the new equipment is put into operation.
The multifunctional test power supply provided by the embodiment has a function of searching for a ground fault, and the function is realized by matching a multifunctional test power supply host (namely, an information processing center) with a router and a handheld device. The communication mechanism is that the coordinator is communicated with the router, the router is communicated with the handset, when the ground fault is searched for in a long distance, the router is matched, the router serves as a ZigBee wireless network transmission intermediate node and transmits data collected by the handset back to the host, otherwise, the router is not needed in a short distance. In addition to their communication capabilities, each has different features, where the coordinator is responsible for starting and establishing the entire wireless sensor network, the router is responsible for intermediate transfer points for data sent on the handset, and the handset is responsible for secondary loop ground state detection and lookup. When the coordinator receives the instruction sent by the central processing unit through the serial port, the coordinator transmits the instruction to the handheld device through 0 or 1 router and executes the instruction. Meanwhile, the handheld device transmits the working information to the coordinator to reach the central processing unit, and the central processing unit performs data processing, algorithm analysis and calculation, displays data information and realizes information interaction.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (6)
1. The utility model provides a multi-functional test power based on zigBee internet of things, its characterized in that includes: an information processing center and a handset;
the information processing center is connected with the handset through a wireless network;
the information processing center is provided with a micro direct current system test unit, and the micro direct current system test unit provides required test power supply for newly-thrown equipment under the control of the information processing center.
2. The multifunctional test power supply based on the ZigBee Internet of things technology of claim 1, wherein the information processing center further comprises: a coordinator;
the information processing center establishes wireless network connection with the handheld device through the coordinator, and the wireless network connection is a ZigBee-based wireless sensor network.
3. The multifunctional test power supply based on the ZigBee Internet of things technology as claimed in claim 2, wherein the information processing center further comprises: a central processing unit;
the central processing unit is respectively connected with the miniature direct current system test unit and the coordinator.
4. The multifunctional test power supply based on the ZigBee Internet of things technology of claim 3, wherein the information processing center further comprises: the device comprises a display, a serial port communication module, an external memory and a clock circuit;
the display, the serial port communication module, the clock circuit and the external memory are all connected with the central processing unit.
5. The multifunctional test power supply based on the ZigBee Internet of things technology of claim 1, wherein the handset specifically comprises: the device comprises an antenna circuit, a processing chip and a current detection circuit;
the antenna circuit and the current detection circuit are respectively connected with the processing chip;
the antenna circuit is connected with the information processing center through a ZigBee wireless sensing network.
6. The multifunctional test power supply based on the ZigBee Internet of things technology as claimed in claim 5, wherein the handset further comprises: the voice prompt circuit, the display module and the storage battery are arranged;
the voice prompt circuit, the display module and the storage battery are respectively connected with the processing chip.
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| CN202220806380.8U CN217133339U (en) | 2022-04-08 | 2022-04-08 | Multifunctional test power supply based on ZigBee Internet of things technology |
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| CN202220806380.8U CN217133339U (en) | 2022-04-08 | 2022-04-08 | Multifunctional test power supply based on ZigBee Internet of things technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114720827A (en) * | 2022-04-08 | 2022-07-08 | 广东电网有限责任公司 | Multifunctional test power supply based on ZigBee Internet of things technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114720827A (en) * | 2022-04-08 | 2022-07-08 | 广东电网有限责任公司 | Multifunctional test power supply based on ZigBee Internet of things technology |
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