CN112180212A - Edge computing system, method and terminal with high-low voltage synchronous measurement and protection - Google Patents
Edge computing system, method and terminal with high-low voltage synchronous measurement and protection Download PDFInfo
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- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The invention relates to an edge computing system, a method and a terminal with high-low voltage synchronous measurement and protection. An edge computing system with high-low voltage synchronous measurement and protection comprises a high-voltage circuit breaker, a distribution transformer, an intelligent circuit breaker and an edge computing device; the edge computing device comprises a control module, a sampling module and a downlink communication device; the sampling module and the downlink communication device are respectively connected with the control module. High-voltage circuit breaker, distribution transformer, intelligent circuit breaker all integrate current and voltage transformer in inside, carry out synchronous sampling to 10kV side and 0.4kV side voltage, electric current, and the correlation degree is high between the high-low pressure sensing data, makes the fault judgement result more accurate. The edge calculation device calculates the power and electric quantity data of the high-voltage side according to the voltage and the current of the high-voltage side, and simultaneously calculates the power and the electric quantity data of the low-voltage side according to the voltage and the current of the low-voltage side, and calculates the line loss condition in the area in real time according to the power and the electric quantity of the high-voltage side and the low-voltage side.
Description
Technical Field
The invention relates to electronic equipment, in particular to an edge computing system, a method and a terminal with high-low voltage synchronous measurement and protection.
Background
The more platform district fault detection and line loss analysis product of using at present has generally been divided into the three-phase electric energy meter that is used for the low pressure measurement, the high-pressure meter of high pressure measurement, low-voltage circuit breaker of low pressure protective equipment, high-voltage protection's distribution automation terminal (DTU/FTU), differential protection's equipment such as transformer protection, though the product of this kind of scheme also can accomplish the fault detection and the line loss analysis of certain function, still has more problem when the field application: 1) various independent high-voltage and low-voltage protection and monitoring devices are installed, analog quantities such as voltage and current are connected into different devices, wiring is complex, implementation and maintenance difficulty is high, cost is high, and batch popularization is not facilitated; 2) the independent high-low pressure equipment occupies more volume and space, and is not beneficial to urban beauty and intensive land use; 3) the high-voltage measurement and the low-voltage measurement are monitored by independent equipment and are uploaded to a main station to calculate and analyze line loss, the requirements on the processing speed and resources of the main station are high, and the real-time performance is low; 4) the transformer area monitoring equipment generally has no protection function, and cannot monitor and control the internal fault of the transformer and the transformer area fault; 5) the distribution automation terminal has a high-voltage protection function, but can not be connected to low-voltage measurement, does not have internal fault detection and protection of a transformer, and does not have a high-voltage and low-voltage line loss real-time analysis function.
Patent document CN201920983673.1 discloses a power failure fault alarm device for power supply area based on edge calculation, which collects power failure information of household meters at the side of the power supply area through a merging unit, and classifies the power failure data according to a topological structure; then, a clock synchronization unit is controlled through a processing unit, the power failure time of all the electric meters is corrected by adopting a clock, and the consistency of timestamps uploaded by the low-voltage user meters is ensured; then, through a verification unit, after the reported data of the power failure event of the ammeter is received, a test calling instruction is issued; performing local edge calculation on the collected power supply area power failure events through an edge calculation unit; and finally, transmitting the power failure information to the master station through the GPRS transmission unit and then transmitting the power failure information to the robbers and the users. But still does not solve the above problems.
Therefore, the existing platform area fault control technology has defects and needs to be improved and enhanced.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide an edge computing system, method and terminal with high and low voltage synchronous measurement and protection, so as to solve the technical problems mentioned in the background art.
In order to achieve the purpose, the invention adopts the following technical scheme:
an edge computing system with high-low voltage synchronous measurement and protection comprises a high-voltage circuit breaker, a distribution transformer, an intelligent circuit breaker and an edge computing device; the high-voltage circuit breaker and the intelligent circuit breaker are respectively connected to the primary side and the secondary side of the distribution transformer;
the edge computing device comprises a control module, a sampling module and a downlink communication device; the sampling module and the downlink communication device are respectively connected with the control module;
the sampling module is respectively connected with the high-voltage circuit breaker, the distribution transformer and the intelligent circuit breaker and is used for acquiring line sensing data of the high-voltage circuit breaker, the distribution transformer and the intelligent circuit breaker and transmitting the line sensing data to the control module;
the downlink communication device is connected with the intelligent circuit breaker and used for data interaction between the control module and the intelligent circuit breaker;
and the control module is used for determining high-low voltage metering and line loss data of the system according to the data transmitted by the sampling module and driving the high-voltage circuit breaker or the intelligent circuit breaker to switch on and off.
Preferably, the edge computing system with high-low voltage synchronous measurement and protection comprises a control module, a control module and a control module, wherein the control module comprises a driving unit, a protection unit and a metering unit;
the metering unit is connected with the sampling module and used for synchronously acquiring measurement data and obtaining high-voltage metering, low-voltage metering, branch metering and real-time line loss;
the protection unit is used for acquiring high-low voltage protection current data, judging whether a system has a fault or not, and determining differential protection and high-voltage protection;
and the driving unit is used for driving the high-voltage circuit breaker and/or the intelligent circuit breaker to switch on and off according to the instruction of the protection unit.
Preferably, the edge computing system with high-low voltage synchronous measurement and protection function is provided with a first sensor group and a high-voltage driving interface; the high-voltage driving interface is connected with the driving unit; the first sensor group is connected with the sampling module.
Preferably, the edge computing system with high-low voltage synchronous measurement and protection, the distribution transformer has a second sensor group and a transformation driving interface; the variable voltage driving interface is connected with the driving unit; the second sensor group is connected with the sampling module and is arranged on the secondary side of the distribution transformer.
Preferably, the edge computing system with high-low voltage synchronous measurement and protection, the intelligent circuit breaker has a circuit breaking communication unit and a third sensor group; the broken circuit communication unit is connected with the downlink communication device; the third sensor group is connected with the sampling module.
Preferably, the edge computing system with high-low voltage synchronous measurement and protection comprises a high-voltage sampling unit, a low-voltage sampling unit and a circuit breaker sampling unit; the high-voltage sampling unit is connected with the high-voltage circuit breaker; the distribution transformer is connected with the low-voltage sampling unit; the intelligent circuit breaker is connected with the circuit breaker sampling unit.
Preferably, the edge computing system with high-low voltage synchronous measurement and protection, and the downstream communication device is a wired communication device and/or a wireless communication device.
Preferably, the edge computing system with high-low voltage synchronous measurement and protection further comprises a plurality of branch circuit breakers, wherein the branch circuit breakers are arranged in distribution lines under the jurisdiction of the intelligent circuit breakers according to a set topological structure and all perform data interaction with the intelligent circuit breakers.
An edge calculation method for measurement protection of the system, comprising the steps of:
s1, acquiring high-pressure and low-pressure sensing data in the system;
s2, obtaining high-voltage, low-voltage and branched metering data of the system according to the high-low and low-voltage sensing data to obtain the working state of the system;
and S3, protecting the system according to the system working state.
An edge computing power distribution terminal includes a body and an edge computing device in the system installed in the body; the body comprises a device panel and a device interface; the device panel is provided with a liquid crystal display screen, keys, an indicator light and a system maintenance interface which are all connected with the control module; and a high-low voltage synchronous sampling interface and a downlink communication interface are arranged on the device interface and are respectively connected with the sampling module and the downlink communication device according to corresponding functions.
Compared with the prior art, the edge computing system, the method and the terminal with high-low voltage synchronous measurement and protection provided by the invention have the following beneficial effects:
1) the edge computing system provided by the invention realizes synchronous acquisition of sensing data of the high-voltage circuit breaker, the distribution transformer and the intelligent circuit breaker through the edge computing device, directly and locally judges whether a node has a fault or not based on the sensing data, and drives the high-voltage circuit breaker and the intelligent circuit breaker to be switched on and off; protection can be realized without uploading a server or a master station, and the method is quick and convenient;
2) according to the edge computing system provided by the invention, the edge computing device integrates actual effect functions such as high-low voltage protection, high-low voltage metering, variable voltage differential protection and the like, and is locally realized by using the edge computing device, so that the convenience and the rapidness are realized;
3) according to the edge computing system provided by the invention, the high-voltage circuit breaker, the distribution transformer and the intelligent circuit breaker are organically unified through the edge computing device, the wiring is simple, and the maintenance difficulty is low;
4) the edge computing terminal provided by the invention adopts a small structural design, simplifies a plurality of field devices into one device, and reduces the occupied volume and space by 50%; meanwhile, the functions of a plurality of devices are organically integrated in a unified mode, voltage, current and the like are connected into the same device, field wiring is simple and convenient, implementation and maintenance difficulty is low, device cost is greatly reduced, and batch popularization is facilitated.
Drawings
FIG. 1 is a block diagram of an edge computing system with high and low voltage synchronous measurement and protection provided by the present invention;
FIG. 2 is a block diagram of a control module provided by the present invention;
FIG. 3 is a schematic diagram of one embodiment of an edge computing system provided by the present invention;
FIG. 4 is a schematic diagram of a panel of an edge computing terminal provided by the present invention;
FIG. 5 is a schematic diagram of an interface of an edge computing terminal provided by the present invention;
FIG. 6 is a flow chart of an edge calculation method provided by the present invention;
FIG. 7 is a real-time flowchart of the edge calculation method provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the present invention provides an edge computing system with high-low voltage synchronous measurement and protection, which includes a high-voltage circuit breaker 1, a distribution transformer 2, an intelligent circuit breaker 3 and an edge computing device 4; the high-voltage circuit breaker 1 and the intelligent circuit breaker 3 are respectively connected to the primary side and the secondary side of the distribution transformer 2; specifically, edge computing device 4 uses embedded mounting structure, convenient cooperation high voltage circuit breaker 1, distribution transformer 2 intelligent circuit breaker 3 installs together in the cubical switchboard of joining in marriage electrical room.
The edge calculation device 4 comprises a control module 42, a sampling module 41 and a downlink communication device 43; the sampling module 41 and the downlink communication device 43 are respectively connected with the control module 42;
the sampling module 41 is respectively connected with the high-voltage circuit breaker 1, the distribution transformer 2 and the intelligent circuit breaker 3, and is used for acquiring line sensing data of the high-voltage circuit breaker 1, the distribution transformer 2 and the intelligent circuit breaker 3 and transmitting the line sensing data to the control module 42;
the downlink communication device 43 is connected with the intelligent circuit breaker 3 and is used for the control module 42 to perform data interaction;
and the control module 42 is used for determining high-low voltage metering and line loss data of the system according to the data transmitted by the sampling module 41 and driving the high-voltage circuit breaker 1 or the intelligent circuit breaker 3 to switch on and off.
It should be noted that, in the present embodiment, the high-voltage circuit breaker 1, the distribution transformer 2, and the intelligent circuit breaker 3 are all connected to the edge computing device 4; the high-voltage circuit breaker 1 is configured to control on/off of a distribution line on a primary side (i.e., a high-voltage side in this embodiment) of the distribution transformer 2, and of course, in this embodiment, the high-voltage circuit breaker 1 further includes a current detection device (preferably, a current transformer), a voltage detection device (preferably, a voltage transformer) and a basic component for driving a switch to trip and close, which are included in a general high-voltage switch, and when the high-voltage circuit breaker is connected to the edge calculation device 4, the corresponding functional components are respectively connected to the sampling module 41, the control module 42 and the like in an adaptive manner, and can control on/off of the high-voltage circuit breaker according to a relevant instruction of the control module 42, so as to achieve on/off of the connected line, for example, an elastic operation mechanism in the high-voltage; the intelligent circuit breaker 3 is configured to control on/off of a distribution line on a secondary side (i.e., a low-voltage side in this embodiment) of the distribution transformer 2, and has functional components corresponding to the intelligent circuit breaker 3 commonly used in the art, where a specific connection manner is similar to that described above and is not described in detail, and of course, the number of the intelligent circuit breakers 3 is not limited, and is set according to a branch requirement, and is assembled according to a corresponding topological relationship, and is all in communication connection with the edge computing device 4; the distribution transformer 2 is used for voltage conversion, is a common transformer device in the field, is not specifically limited, and is provided with a line sensing data acquisition assembly at the secondary side for detecting the line voltage and current at the secondary side, and is certainly also connected with the sampling module 41, specifically consistent with the foregoing and not repeated. The control module 42 is connected with an upper computer, and the specific communication mode is not limited
Referring to fig. 6, the edge calculating device 4 is configured to control the high-voltage circuit breaker 1 and the intelligent circuit breaker 3 to implement the aforementioned functions, and meanwhile, the sampling module 41 is used to respectively obtain line sensing data (i.e. corresponding voltage/current detection data) of the high-voltage circuit breaker 1, the intelligent circuit breaker 3, and the distribution transformer 2, and meanwhile, the control module 42 is used to implement an edge calculating method for measurement protection, which includes the steps of:
s1, synchronously acquiring high-pressure and low-pressure sensing data in the system;
s2, obtaining high-voltage, low-voltage and branched metering data of the system according to the high-low and low-voltage sensing data to obtain the working state of the system; specifically, the working state includes a high-voltage line fault, a transformer area fault and the like, and the corresponding fault includes a line loss, a differential pressure abnormality and the like. It should be noted that, the determination method for determining whether the operating state has a fault is a common technical means in the field, and is not limited.
And S3, performing system protection according to the working state of the system, and uploading data to an upper computer. The edge computing device 4 is also in communication connection with an upper computer, and the upper computer is a terminal computer, a server and the like.
Specifically, the sampling modes of the edge calculating device 4 are divided into two types: one is to use the sampling module 41 to directly read the line sensing data detected by the detection components in the high-voltage circuit breaker 1, the distribution transformer 2 and the intelligent circuit breaker 3, so as to realize synchronous sensing sampling of high and low voltage lines, and the specific preferred technical scheme is that the sampling module 41 comprises a high-voltage sampling unit, a low-voltage sampling unit and a circuit breaker sampling unit, the three sampling units respectively perform synchronous data acquisition on the high-voltage circuit breaker 1, the distribution transformer 2 and the intelligent circuit breaker 3, and respectively realize data transmission through corresponding ADC sampling channels; the other is to use the downlink communication device 43 to read the line sensing data of the intelligent circuit breaker 3, so as to realize communication sampling. After the edge computing device 4 obtains the sensing data through the two manners, the working state of the system is determined, so that the protection of the whole system is realized, wherein the protection comprises high-voltage protection, differential protection and the like.
The invention provides an edge calculation system with high-low voltage synchronous measurement and protection, which is formed by using the edge calculation method of measurement and protection, using sensing sampling and communication sampling to obtain sensing data, and further realizing high-low voltage line loss synchronous analysis, high-low voltage differential protection and the like. High voltage circuit breaker 1, distribution transformer 2, intelligent circuit breaker 3 all at inside integrated current and voltage transformer, carry out synchronous sampling to 10kV side and 0.4kV side voltage, electric current, realize that the synchronization of sensing data acquires, and the degree of correlation is high between the high-low pressure sensing data, makes the fault judgement result more accurate. The edge calculating device 4 calculates the power and electric quantity data of the high voltage side according to the voltage and current of the high voltage side, and calculates the power and electric quantity data of the low voltage side according to the voltage and current of the low voltage side, and calculates the line loss condition in the area in real time according to the power and electric quantity of the high and low voltages. The edge calculating device 4 calculates whether a fault occurs in the area according to the current difference between the high-voltage side and the low-voltage side, and realizes the high-voltage and low-voltage differential protection function. And the edge computing device 4 uploads the line loss computing and fault positioning isolation results to the main station and operation and maintenance personnel.
Referring to fig. 2 and fig. 3, as a preferred scheme, in the present embodiment, the control module 42 includes a driving unit 421, a protection unit 422, and a metering unit 423;
the metering unit 423 is connected with the sampling module 41 and is used for synchronously acquiring measurement data and obtaining high-voltage metering, low-voltage metering, branch metering and real-time line loss; correspondingly, have high pressure measurement APP (application), low pressure measurement APP, branch measurement APP, through after sampling module 41 acquires high pressure sensing data, low pressure sensing data, use aforementioned each APP, realize the corresponding measurement function of measurement unit 423. The branch measurement is performed by using corresponding sensing data obtained by communication sampling between the downlink communication device 43 and the circuit breakers on all branch lines in the line under the jurisdiction of the distribution transformer 2. In particular, the above-mentioned methods for metering are the technical means commonly used in the art.
The protection unit 422 is used for synchronously acquiring high-voltage and low-voltage protection data, judging whether a system has a fault, and determining differential protection and high-voltage protection; specifically, protection unit 422 has high voltage protection APP, vary voltage differential protection APP, is in corresponding operating condition at corresponding measurement data, then opens corresponding protection APP, for example is in abnormal fault state when high voltage measurement data, then starts high voltage protection APP, and then passes through drive unit 421, control high voltage circuit breaker 1 separating brake realizes the protection of opening a circuit. Other protection functions are implemented similarly to the foregoing. In the above, the corresponding failure determination method is a commonly used technical means in the field, and the present invention is not limited.
And the driving unit 421 is used for driving the high-voltage circuit breaker 1 and/or the intelligent circuit breaker 3 to switch on and off according to the instruction of the protection unit 422.
Specifically, the bottom layer interface of the edge computing device is composed of an ADC high-low voltage synchronous sampling module 41, a communication sampling module 41, and a control interface. The high-level layer consists of a protection and measurement data storage, a metering data storage and a protection driving circuit. The application layer takes an MCU multitask platform as a core, and simultaneously realizes the applications of high-voltage protection APP, transformer differential protection APP, real-time line loss analysis and the like in one device.
As a preferable solution, in this embodiment, the high-voltage circuit breaker 1 has a first sensor group and a high-voltage driving interface; the high voltage driving interface is connected with the driving unit 421; the first sensor group is connected to the sampling module 41.
Preferably, in this embodiment, the distribution transformer 2 has a second sensor group and a transformation driving interface; the variable voltage driving interface is connected with the driving unit 421; the second sensor group is connected to the sampling module 41.
Preferably, in this embodiment, the intelligent circuit breaker 3 has a circuit breaking communication unit and a third sensor group; the disconnection communication unit is connected to the downlink communication device 43; the third sensor group is connected with the sampling module 41 and installed on the secondary side of the distribution transformer 2.
A 10kV high-voltage circuit breaker 1 is installed at a high-voltage part of a power distribution station area, and the first sensor group in the high-voltage circuit breaker 1 is integrated into a first current transformer CT1 and a first voltage transformer PT2 (specifically, if the high-voltage circuit breaker is a three-phase distribution line, the number of corresponding sensors is 3, and the specific number depends on requirements); the second sensor group on the secondary side of the distribution transformer 2 integrates a second current transformer CT2 and a second voltage transformer PT2 (the specific requirements are similar as the arrangement in the medium-high voltage circuit breaker 1); the intelligent circuit breaker 3 is a low-voltage main switch of a line under jurisdiction, and a third sensor group in the intelligent circuit breaker is integrated with a third current transformer CT3 and a third voltage transformer PT 3. Specifically, when the first/second/third sensor group is used for detecting the sensing data of the line, the reading of the detection value is adjusted according to the transformation ratio of the distribution transformer 2, for example, the primary side of the distribution transformer 2 is connected with a voltage of 10kV, the secondary side outputs a voltage of 0.4kV, the transformation ratio is 25, when the primary side inputs a high voltage of 1I, the secondary side theoretically outputs a low-voltage current of 25I, and the reading value needs to be balanced by setting, the reading values of the second/third current transformers on the secondary side are all reduced by 25 times, or the reading value of the first current transformer is increased by 25 times, and of course, in consideration of the internal consumption of the transformer, the corresponding change ratio is set according to specific situations. In the following examples, the above-described settings were used as a basis for implementation.
As a preferable scheme, in this embodiment, the sampling module 41 includes a high-voltage sampling unit, a low-voltage sampling unit, and a circuit breaker sampling unit; the high-voltage sampling unit is connected with the high-voltage circuit breaker 1, is provided with a high-voltage ADC conversion chip and is connected with the first sensor group; the distribution transformer 2 is connected with the low-voltage sampling unit, is provided with a low-voltage ADC conversion chip and is connected with the second sensor group; the intelligent circuit breaker 3 is connected with the circuit breaker sampling unit, is provided with a low-voltage ADC conversion chip and is connected with the third sensor group.
Specifically, first sensor group the second sensor group the third sensor group is the same sensing element, sensing element includes current sensor, voltage sensor, certainly, in concrete implementation, what use in the first sensor group is the current sensor and the voltage sensor who are suitable for high-voltage distribution lines, what second/third sensor group used is the circuit sensor and the voltage sensor who use low-voltage distribution lines.
Preferably, in this embodiment, the downlink communication device 43 is a wired communication device and/or a wireless communication device. The wired communication device is preferably an RS485 communication device and carrier communication.
Specifically, still have the synchronous measurement APP in control module 42 for according to the sampling mode of setting for, carry out the sampling of sensing data, specifically do high/low pressure ADC conversion chip in sampling module 41 by the synchronous measurement APP manages and controls, provides synchronous conversion clock to high/low pressure ADC conversion chip, realizes the synchronous sampling of 3 pieces of high/low pressure ADC conversion chip, and the sampling time error of driving 3 pieces of high/low pressure ADC conversion chip is 10 microseconds, and with this synchronous sensing data storage to protection and measured data memory area (control module 42 from taking the memory area).
The edge computing device 4 also performs communication sampling through the downlink communication device 43, and data of the intelligent low-voltage circuit breaker in the power distribution room are communicated through RS 485; the intelligent low-voltage circuit breakers or the branch circuit breakers with long distances among the branch boxes are communicated through carrier waves, the edge computing device 4 is used for carrying out clock synchronization on each intelligent low-voltage circuit breaker to achieve synchronization of voltage, current, power and other data of each branch device, each intelligent circuit breaker 3 stores minute data into an internal memory, the edge computing device 4 is used for collecting a whole-minute data curve of each circuit breaker through communication sampling, the data are stored into a metering data area, and metering and fault judgment are facilitated.
The high-voltage sensing data for performing high-voltage protection, high-voltage metering and transformer differential protection in the edge computing device 4 are from the same high-voltage transformer and sampling channel (in this embodiment, the high-voltage sensing data are respectively a first sensor group and a high-voltage sampling unit); the low-voltage sensing data for low-voltage protection, low-voltage metering and transformer differential protection in the edge computing device 4 is from the same low-voltage transformer and sampling channel (in this embodiment, the second sensor group and the low-voltage sampling unit are respectively used), and the high-voltage and low-voltage services and the functional data have the same source. The edge computing device 4 stores the voltage and current data in a common area, builds a digital model of the data (for example, builds a sensing data curve of each device, and builds the curve in a manner commonly used in the art), and transmits the digital model data to each service APP.
As a preferable scheme, in this embodiment, the system further includes a plurality of branch breakers, which are arranged in distribution lines under the jurisdiction of the intelligent breakers 3 according to a set topology structure, and all interact with the intelligent breakers 3. Specifically, data such as 2 to 5 low-voltage intelligent low-voltage circuit breaking voltage, current, power and the like of the power distribution cabinet or the branch box are uploaded to the edge computing device 4 through RS485 or carrier waves.
Specifically, referring to fig. 7, in the processing process, the edge computing device 4 uses the control module 42 to specifically execute each corresponding service APP, and includes the steps of:
the control module 42 acquires high-voltage synchronous sampling data (sensing data) and low-voltage synchronous sampling data through the sampling module 41, and establishes a digital model and stores the digital model; further, the following operations are realized:
high-voltage protection operation: a1, starting a high-voltage protection APP, and acquiring high-voltage side breaker current data from a protection and measurement data area (acquired by using a first current transformer CT1 in the first sensor group); a2, detecting an overcurrent event (namely the detection value of the first current transformer CT1 is larger than a set threshold) by the high-voltage protection APP, namely, judging that a two-phase or three-phase short circuit occurs at a high-voltage side, judging that a high-voltage short circuit fault occurs, and driving to execute a tripping instruction to trip off the high-voltage circuit breaker 1 to realize fault isolation; if there is no overcurrent event, a1 is executed;
synchronous metering operation: c1, starting synchronous measurement APP, and acquiring high-voltage current (acquired by the first current transformer CT 1) and high-voltage (acquired by the first voltage transformer PT1) of the high-voltage side of the transformer and corresponding power data from the protection and measurement data area; acquiring data such as node current (acquired through the third current transformer CT 3) and node voltage (acquired through the third voltage transformer PT 3) of the intelligent circuit breaker 3 and corresponding power; c2, carrying out measurement calculation through each measurement APP in the measurement unit 423 to obtain data such as voltage, current and power of each branch node and the high-voltage side; c3, judging whether the detection values of the first current transformer CT1 and the second current transformer CT2 are equal, if so, starting a real-time line loss APP, and executing a step c 4; if not, executing the step b 1; c4, acquiring a current difference between readings of the first current transformer CT1 and the third current transformer CT3 by the real-time line loss APP, judging whether the current difference exceeds a line loss threshold value, if so, generating line abnormal loss of the low-voltage line intelligent circuit breaker 3, sending a line abnormal alarm event, rapidly notifying operation and maintenance personnel to handle abnormality, and executing a step c 5; if not, go to step c 3; c5, calculating the electric quantity of the inlet wire end of the distribution transformer 2 by a high-voltage measurement APP, calculating the electric quantity of the sensing data obtained by the third transformer group by a low-voltage measurement APP, calculating the electric quantity of the sensing data of each branch circuit breaker obtained by communication sampling by a branch measurement APP, calculating the electric quantity of the inlet wire of the distribution transformer 2, the electric quantity of the third transformer group and the electric quantity of each branch by a real-time line loss APP, and analyzing the electric quantity loss of each node (the specific method for calculating the line loss is only a calculation method commonly used in the field); c6, judging that the electric quantity loss exceeds the electric quantity threshold value, and if so, giving an alarm to the outside; if not, c4 is executed;
differential protection operation: b1, starting a voltage transformation differential protection APP, and acquiring sensing data (obtained by detection of the first sensor group) on the high-voltage side of the transformer and sensing data (obtained by detection of the second sensor group) on the low-voltage side of the transformer from a protection and measurement data area to synchronize current data on the high-voltage side and the low-voltage side; b2, when the difference between the high-voltage current and the low-voltage current exceeds a set difference, the transformation differential protection APP judges that a fault occurs in the transformer, and the high-voltage circuit breaker 1 is tripped through the control interface, so that fault isolation of the transformer is realized; otherwise, step b1 is executed.
Referring to fig. 4 and 5, the present invention further provides an edge computing power distribution terminal, including a body and an edge computing device 4 installed in the system in the body; the body comprises a device panel and a device interface; a liquid crystal display screen, keys, an indicator light and a system maintenance interface are arranged on the panel of the device and are all connected with the control module 42; and a high-low voltage synchronous sampling interface and a downlink communication interface are arranged on the device interface and are respectively connected with the sampling module 41 and the downlink communication device 43 according to corresponding functions.
Specifically, the edge computing power distribution terminal adopts an embedded installation structure, namely, the corresponding edge computing systems inside are assembled in a module embedding mode and are conveniently installed in a switch cabinet of a power distribution room and a pole-mounted transformer control cabinet. Fig. 4 is a schematic diagram of an edge computing power distribution terminal panel, which is designed with maintenance interfaces such as liquid crystal, keys, indicator lights, USB, RS232, and the like, and also designed with control mode selection buttons for protection, switching, remote and local control, and the like. The hardware framework of body adopts the design of modularization picture peg, and length width is 166 millimeters, 189 millimeters, 151 millimeters respectively, and the size is small and exquisite, easy to assemble. Fig. 5 is a layout diagram of an edge-mounted computing power distribution terminal port, which includes a high-voltage and low-voltage synchronous sampling interface, a downlink communication interface, a GPS interface, a network interface, and an MCU platform board plug in the control module 42.
In specific implementation, the edge computing system is installed at a 10kV pole-mounted transformer or a 10kV power distribution room and other positions, and functions of transformer differential protection, transformer area line loss analysis, high-voltage and low-voltage overcurrent protection and the like are achieved by synchronously collecting high-voltage and low-voltage voltages and currents. The edge calculating device comprises an ADC high-low voltage synchronous sampling module 41, a communication sampling module, a control interface, high-voltage protection, differential protection, high-voltage measurement, low-voltage measurement, branch measurement, real-time line loss analysis, a monitoring master station and the like.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.
Claims (10)
1. An edge computing system with high-low voltage synchronous measurement and protection is characterized by comprising a high-voltage circuit breaker, a distribution transformer, an intelligent circuit breaker and an edge computing device; the high-voltage circuit breaker and the intelligent circuit breaker are respectively connected to the primary side and the secondary side of the distribution transformer;
the edge computing device comprises a control module, a sampling module and a downlink communication device; the sampling module and the downlink communication device are respectively connected with the control module;
the sampling module is respectively connected with the high-voltage circuit breaker, the distribution transformer and the intelligent circuit breaker and is used for acquiring and synchronously acquiring high-voltage and low-voltage line sensing data and transmitting the data to the control module;
the downlink communication device is connected with the intelligent circuit breaker and used for data interaction between the control module and the intelligent circuit breaker;
and the control module is used for determining high-low voltage metering and line loss data of the system according to the data transmitted by the sampling module and driving the high-voltage circuit breaker or the intelligent circuit breaker to switch on and off.
2. The edge computing system with high and low voltage synchronous measurement and protection as claimed in claim 1, wherein the control module comprises a driving unit, a protection unit, a metering unit;
the metering unit is connected with the sampling module and used for synchronously acquiring measurement data and obtaining high-voltage metering, low-voltage metering, branch metering and real-time line loss;
the protection unit is used for acquiring high-low voltage protection current data, judging whether a system has a fault or not, and determining differential protection and high-voltage protection;
and the driving unit is used for driving the high-voltage circuit breaker and/or the intelligent circuit breaker to switch on and off according to the instruction of the protection unit.
3. The edge computing system with high and low voltage synchronous measurement and protection of claim 2, wherein the high voltage circuit breaker has a first sensor group and a high voltage drive interface; the high-voltage driving interface is connected with the driving unit; the first sensor group is connected with the sampling module.
4. The edge computing system with high and low voltage synchronous measurement and protection of claim 2, wherein the distribution transformer has a second sensor bank and a transformer drive interface; the variable voltage driving interface is connected with the driving unit; the second sensor group is connected with the sampling module and is arranged on the secondary side of the distribution transformer.
5. The edge computing system with high and low voltage synchronous measurement and protection as claimed in claim 2, wherein the intelligent circuit breaker has a circuit breaking communication unit and a third sensor group; the broken circuit communication unit is connected with the downlink communication device; the third sensor group is connected with the sampling module.
6. The edge computing system with high-low voltage synchronous measurement and protection according to claim 1, wherein the sampling module comprises a high-voltage sampling unit, a low-voltage sampling unit and a circuit breaker sampling unit; the high-voltage sampling unit is connected with the high-voltage circuit breaker; the distribution transformer is connected with the low-voltage sampling unit; the intelligent circuit breaker is connected with the circuit breaker sampling unit.
7. The edge computing system with high and low voltage synchronous measurement and protection according to claim 1, wherein the downstream communication device is a wired communication device and/or a wireless communication device.
8. The edge computing system with high-low voltage synchronous measurement and protection according to claim 1, further comprising a plurality of branch breakers arranged in distribution lines under the jurisdiction of the intelligent breakers according to a set topology structure, and performing data interaction with the intelligent breakers.
9. An edge calculation method for measurement protection of a system according to any of claims 1-8, comprising the steps of:
s1, synchronously acquiring high-pressure and low-pressure sensing data in the system;
s2, obtaining high-voltage, low-voltage and branched metering data of the system according to the high-low and low-voltage sensing data to obtain the working state of the system;
and S3, protecting the system according to the system working state.
10. An edge computing power distribution terminal comprising a body and an edge computing device in the system of any one of claims 1-8 disposed in the body; the body comprises a device panel and a device interface; the device panel is provided with a liquid crystal display screen, keys, an indicator light and a system maintenance interface which are all connected with the control module; and a high-low voltage synchronous sampling interface and a downlink communication interface are arranged on the device interface and are respectively connected with the sampling module and the downlink communication device according to corresponding functions.
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| CN202011022794.3A CN112180212A (en) | 2020-09-25 | 2020-09-25 | Edge computing system, method and terminal with high-low voltage synchronous measurement and protection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113131725A (en) * | 2021-04-16 | 2021-07-16 | 安徽大学 | Intelligent power module based on silicon carbide and application |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113131725A (en) * | 2021-04-16 | 2021-07-16 | 安徽大学 | Intelligent power module based on silicon carbide and application |
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