CN114152383A - Capacitor expansion monitoring system and monitoring method - Google Patents
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- CN114152383A CN114152383A CN202111448059.3A CN202111448059A CN114152383A CN 114152383 A CN114152383 A CN 114152383A CN 202111448059 A CN202111448059 A CN 202111448059A CN 114152383 A CN114152383 A CN 114152383A
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- 239000003990 capacitor Substances 0.000 title claims abstract description 241
- 238000012544 monitoring process Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000008447 perception Effects 0.000 claims abstract description 15
- 230000007613 environmental effect Effects 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 6
- 230000008961 swelling Effects 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 description 10
- 238000007689 inspection Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000001965 increasing effect Effects 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 230000004931 aggregating effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
- G01L11/002—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by thermal means, e.g. hypsometer
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Abstract
The invention discloses a capacitor expansion monitoring system and a monitoring method, wherein the system comprises: a plurality of pressure sensors, at least one pressure sensor being associated with each capacitor unit; each pressure sensor is correspondingly connected with one data concentrator; the data concentrator is used for detecting the ambient temperature of the environment and collecting surface pressure data of the pressure sensor connected with the data concentrator; the data concentrator also transmits the event data to the server through the gateway; the server is used for sending the data packet of the data concentrator serving as the event publisher to the data concentrator serving as the event subscriber through the gateway according to the cooperative perception relationship among the data concentrators; the data concentrator, which is an event subscriber, determines from the data in the data packet the risk level of swelling of the capacitor cells that it monitors. The expansion monitoring efficiency of the capacitor is improved, and the stable and safe operation of a power grid system is ensured.
Description
Technical Field
The embodiment of the invention relates to the technical field of capacitor expansion detection, in particular to a capacitor expansion monitoring system and a monitoring method.
Background
With the development of science and technology, inductive loads in power grids are increasing. Therefore, in order to reduce the reactive loss of the inductive load to the power supply, the parallel capacitor devices with corresponding indexes are used in the power grid for reactive compensation.
The parallel capacitor device is composed of a plurality of capacitor units, when a certain capacitor unit is damaged or even damaged due to a series of reasons such as environmental temperature, overload of load and the like, the capacitor bulge expansion can not be found and solved in time, and the capacitor unit is a very dangerous hidden danger for a power grid system and is very likely to cause the instability of power grid work or even major safety accidents. And when the above-mentioned situation occurs in a certain capacitor unit, the rest capacitor units in the same parallel capacitor device also have the risk of the same situation. The same risk may occur with a peripheral parallel capacitor arrangement. Aiming at the problems, at present, no short-term and efficient collaborative sensing parallel capacitor expansion detection method is available, and the current workload of periodic inspection by personnel is increased only by a manual inspection mode, so that the efficiency of capacitor bulge expansion monitoring is reduced, and the stable and safe operation of a power grid system is influenced.
Disclosure of Invention
The embodiment of the invention provides a capacitor expansion monitoring system and a monitoring method, which are used for reducing the workload of periodic inspection by personnel, reducing the false detection rate, shortening the emergency response period and greatly improving the stable and safe operation of a power grid system.
In a first aspect, an embodiment of the present invention provides a capacitor expansion monitoring system, including:
a plurality of pressure sensors disposed on a surface of the capacitor cells in the parallel capacitor device; wherein the parallel capacitor device comprises a plurality of capacitor units connected in parallel, and each capacitor unit is at least provided with one pressure sensor; the pressure sensor is used for detecting surface pressure data of the capacitor unit;
each pressure sensor is correspondingly connected with one data concentrator; the data concentrator is used for detecting the ambient temperature of the environment and collecting surface pressure data of the pressure sensor connected with the data concentrator;
a gateway and a server, said gateway and said server and said data concentrator being connected,
the data concentrator is further operable to transmit the ambient temperature and the surface pressure data to the server via the gateway;
the server is used for forming a data packet by the surface pressure data and the ambient temperature sent by the same data concentrator; and according to the cooperative perception relationship among the data concentrators, sending the data packet of the data concentrator serving as the event publisher to the data concentrator serving as the event subscriber through the gateway, so that the data concentrator serving as the event subscriber determines the expansion risk level of the capacitor unit monitored by the data concentrator according to the data in the data packet.
Optionally, each data concentrator collects surface pressure data of a capacitor unit, where the capacitor unit includes a plurality of surfaces, and each surface is provided with at least one pressure sensor.
Optionally, each data concentrator collects surface pressure data of a plurality of capacitor units, each capacitor unit comprises a plurality of surfaces, and each surface is provided with at least one pressure sensor; the data concentrator is located in the same parallel capacitor device corresponding to the collected capacitor units.
Optionally, the number of the parallel capacitor devices is multiple, and the capacitor units correspondingly collected by the two data concentrators having the cooperative sensing relationship are respectively located in the two parallel capacitor devices and/or in the same parallel capacitor device;
each data concentrator comprises at least one data concentrator which is in cooperative perception relationship with the data concentrator; the distance between the data concentrators in the cooperative sensing relationship is less than or equal to 1000 meters.
Optionally, the capacitor expansion monitoring system further comprises:
a plurality of temperature sensors, the pressure sensors being disposed on surfaces of the capacitor units, each capacitor unit being provided with at least one temperature sensor; the temperature sensor is used for detecting surface temperature data of the capacitor unit;
the data concentrator is also used for collecting surface temperature data sent by a temperature sensor connected with the data concentrator, and sending the surface temperature data to the server through the gateway so as to send the surface temperature data to the data concentrator serving as an event subscriber.
Optionally, the number of the gateways is at least two, and each gateway is in communication connection with at least one data concentrator.
Optionally, the server includes:
the event receiving unit is used for receiving the data sent by the data concentrator and analyzing and verifying the correctness of the received data;
the event filtering unit is used for filtering out data which are interested by the event subscriber according to the collaborative perception relationship among the data concentrators;
the event distribution unit is used for forming the filtered data into a data packet and distributing the data packet to a data concentrator serving as an event subscriber through the gateway;
and the event management unit is used for storing and managing the cooperative perception relationship among the data concentrators.
In a second aspect, an embodiment of the present invention provides a capacitor expansion monitoring method, including:
the pressure sensor detects surface pressure data of the capacitor unit; the number of the pressure sensors is multiple, and the pressure sensors are arranged on the surface of the capacitor unit in the parallel capacitor device; wherein the parallel capacitor device comprises a plurality of capacitor units connected in parallel, and each capacitor unit is at least provided with one pressure sensor;
the data concentrator detects the ambient temperature of the environment and collects surface pressure data of the pressure sensor connected with the data concentrator; the number of the data concentrators is at least two, and each pressure sensor is correspondingly connected with one data concentrator;
the data concentrator sends the ambient temperature and the surface pressure data to the server through a gateway; the gateway is connected with the server and the data concentrator;
the server forms a data packet by the surface pressure data and the ambient temperature sent by the same data concentrator; according to the cooperative perception relationship among the data concentrators, a data packet of the data concentrator serving as an event publisher is sent to the data concentrator serving as an event subscriber through the gateway;
the data concentrator, which is an event subscriber, determines the inflation risk level of the capacitor unit that it monitors from the data in the data packet.
Optionally, the data concentrator as an event subscriber determines the expansion risk level of the self-monitored capacitor unit according to the data in the data packet and by combining the self-detected ambient temperature data and the collected surface pressure data, and includes:
the data concentrator serving as an event subscriber judges whether the environmental temperature in the data packet exceeds a preset temperature and judges whether the surface pressure data exceeds preset pressure data;
if both items exceed the two items, determining that the expansion risk level of the capacitor unit collected by the data concentrator as the event subscriber is high risk;
if one item is exceeded, determining the expansion risk level of the capacitor unit collected by the data concentrator as the event subscriber as the medium risk;
and if the expansion risk level of the capacitor unit collected by the data concentrator as the event subscriber is not exceeded, determining the expansion risk level of the capacitor unit as a low risk.
Optionally, after determining that at least one item exceeds, further comprising:
the data concentrator serving as an event subscriber collects the ambient temperature of the data concentrator and surface pressure data of a pressure sensor connected with the data concentrator, and whether a bulge expansion event occurs in a corresponding capacitor unit is determined according to the ambient temperature and the surface pressure data.
The embodiment of the invention provides a capacitor expansion monitoring system and a monitoring method, wherein the capacitor expansion monitoring system comprises: a plurality of pressure sensors disposed on a surface of the capacitor cells in the parallel capacitor device; the parallel capacitor device comprises a plurality of capacitor units connected in parallel, and each capacitor unit is at least provided with one pressure sensor; the pressure sensor is used for detecting surface pressure data of the capacitor unit; each pressure sensor is correspondingly connected with one data concentrator; the data concentrator is used for detecting the ambient temperature of the environment and collecting surface pressure data of the pressure sensor connected with the data concentrator; the gateway is connected with the server and the data concentrator, and the data concentrator is used for sending the ambient temperature and the surface pressure data to the server through the gateway; the server is used for forming a data packet by the surface pressure data and the ambient temperature sent by the same data concentrator; and according to the cooperative perception relationship among the data concentrators, sending the data packet of the data concentrator serving as the event publisher to the data concentrator serving as the event subscriber through the gateway, so that the data concentrator serving as the event subscriber determines the expansion risk level of the capacitor unit monitored by the data concentrator according to the data in the data packet. The technical scheme provided by the invention is based on a mode of short-term cooperative sensing of the expansion risk of the parallel capacitor, and performs cooperative sensing detection on the parallel capacitor device in the power grid so as to reduce the workload of periodic inspection by personnel at present, reduce the false detection rate and shorten the emergency response period, thereby greatly improving the stable and safe operation of the power grid system. In addition, the related workers can analyze the influence of the temperature of the environment where the related workers are located on the capacitor unit through the obtained data so as to optimize the installation environment of the parallel capacitor at a later time.
Drawings
FIG. 1 is a block diagram of a capacitor expansion monitoring system according to an embodiment of the present invention;
FIG. 2 is a diagram illustrating a short-term cooperative sensing process of a capacitor expansion monitoring system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a short-lived cooperative sensing model according to an embodiment of the present invention;
fig. 4 is a flowchart of a method for monitoring expansion of a capacitor according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
An embodiment of the present invention provides a capacitor expansion monitoring system, fig. 1 is a block diagram of a structure of the capacitor expansion monitoring system provided in the embodiment of the present invention, and referring to fig. 1, the capacitor expansion monitoring system includes:
a plurality of pressure sensors 10, the pressure sensors 10 being disposed on surfaces of capacitor cells in the parallel capacitor device; the parallel capacitor device comprises a plurality of capacitor units connected in parallel, and each capacitor unit is at least provided with one pressure sensor 10; the pressure sensor 10 is used for detecting surface pressure data of the capacitor unit;
at least two data concentrators 20, wherein each pressure sensor 10 is correspondingly connected with one data concentrator 20; the data concentrator 20 is used for detecting the ambient temperature of the environment and collecting the surface pressure data of the pressure sensor 10 connected with the data concentrator;
the gateway 30 and the server 40, the gateway 30 and the server 40 and the data concentrator 20 are connected, and the data concentrator 20 is further used for transmitting the ambient temperature and the surface pressure data to the server 40 through the gateway 30;
the server 40 is used for forming a data packet by the surface pressure data and the ambient temperature sent by the same data concentrator 20; and according to the cooperative sensing relationship among the data concentrators 20, sending the data packet of the data concentrator 20 as the event publisher to the data concentrator 20 as the event subscriber through the gateway 30, so that the data concentrator 20 as the event subscriber determines the expansion risk level of the capacitor unit monitored by the data concentrator 20 according to the data in the data packet.
Specifically, in order to reduce the reactive loss of the inductive load to the power supply, a large number of parallel capacitor devices with corresponding indexes are used in the power grid for reactive compensation. A parallel capacitor arrangement is understood to be a capacitor bank formed by a plurality of capacitor units connected in parallel. The capacitor expansion monitoring system for monitoring the capacitor unit is composed of a server 40, a gateway 30, at least two data concentrators 20 and a plurality of capacitor unit detection probes. The capacitor unit detection probe is used for detecting and acquiring pressure data generated by bulge expansion of the capacitor unit, and can be a pressure sensor 10, and each capacitor unit is at least provided with one pressure sensor 10. Each pressure sensor 10 is connected to a data concentrator 20, and the data concentrator 20 is used for detecting the ambient temperature of the environment and collecting the surface pressure data of the pressure sensor 10 connected thereto.
Wherein the data concentrator 20 detects the ambient temperature by means of a temperature sensor arranged thereon. The data concentrator 20 is wired to the pressure sensor 10, and the data concentrator 20 is located in the vicinity of the pressure sensor 10 connected thereto, and the pressure sensor 10 is disposed on the surface of the capacitor unit, so that the ambient temperature detected by the data concentrator 20 through the temperature sensor disposed thereon may be the ambient temperature at which the capacitor unit is located. The ambient temperature has a certain influence on the performance of the capacitor unit, and when the ambient temperature exceeds a certain temperature, the expansion and bulging events of the capacitor unit can be caused. The influence of the temperature of the environment on the capacitor unit can be analyzed by the obtained data for optimizing the installation environment of the parallel capacitor at a later stage.
The gateway 30 serves as a network proxy for aggregating, translating and returning the event data from the data concentrator 20, and the data transceiving load of the data concentrator 20 can be greatly reduced by increasing the gateway 30. The server 40 is used to aggregate, process, count and forward event data from the gateway 30. The server 40 is used for forming a data packet by the surface pressure data and the ambient temperature sent by the same data concentrator 20; and according to the cooperative sensing relationship among the data concentrators 20, sending the data packet of the data concentrator 20 as the event publisher to the data concentrator 20 as the event subscriber through the gateway 30, so that the data concentrator 20 as the event subscriber determines the expansion risk level of the capacitor unit monitored by the data concentrator 20 according to the data in the data packet.
The event data here can be understood as data, such as surface pressure data (bulge data), ambient temperature data, etc., which the data concentrator 20, which is the event publisher, sends to the server 40. After the swelling of the parallel capacitor units, the rest capacitor units in the same parallel capacitor device also have the risk of the same condition, and the risk of the same condition may also occur in the peripheral parallel capacitor devices, so the cooperative sensing relationship between the data concentrators 20 can be determined according to the relationship between the capacitor units respectively and correspondingly collected by the data concentrators 20. For example, the data concentrators 20 responsible for collecting pressure data on the surfaces of parallel capacitor units in the same parallel capacitor arrangement may be configured to have a cooperative sensing relationship; the data concentrators 20 responsible for collecting surface pressure data for parallel capacitor units in closely located parallel capacitor arrangements may be configured to have a cooperative sensing relationship.
For example, fig. 2 is a diagram of a short-term cooperative sensing process of a capacitor expansion monitoring system according to an embodiment of the present invention, and referring to fig. 2, a data concentrator a and a data concentrator B have a cooperative sensing relationship, for example, the data concentrator a serves as an event publisher, the data concentrator B serves as an event subscriber, and the data concentrator a sends ambient temperature and surface pressure data to the server 40 through the gateway 30. The server 40 forms a data packet by the surface pressure data and the ambient temperature sent by the same data concentrator 20; and transmits the data packet of the data concentrator a as an event publisher to the data concentrator B as an event subscriber through the gateway 30 according to the cooperative sensing relationship between the data concentrators 20. The data concentrator B, which is the subscriber to the event, determines from the data in the data packet the risk level of swelling of the capacitor cells that it monitors itself.
The capacitor expansion monitoring system provided by the embodiment of the invention is provided with at least two data concentrators, wherein the data concentrators are used for detecting the environmental temperature of the environment and collecting the surface pressure data of the pressure sensor connected with the data concentrators; sending the environmental temperature and surface pressure data to a server through a gateway; the server can send the data packet of the data concentrator serving as the event publisher to the data concentrator serving as the event subscriber through the gateway according to the cooperative perception relationship among the data concentrators, so that the data concentrator serving as the event subscriber determines the expansion risk level of the capacitor unit monitored by the data concentrator according to the data in the data packet. All the data concentrators are communicated through the gateway and the server, and the relation among the data concentrators is established based on a short-term cooperative sensing mode, so that the value of expansion data of the capacitor unit can be fully utilized, the false detection rate of manual inspection is reduced, the emergency response period is shortened, and the relationship compactness of expansion of the capacitor unit is improved.
Optionally, the server 40 includes:
the event receiving unit is used for receiving the data sent by the data concentrator 20 and analyzing and verifying the correctness of the received data;
an event filtering unit, configured to filter, according to the collaborative awareness relationship among the data concentrators 20, data that is interested by an event subscriber;
an event distribution unit, configured to form a data packet with the filtered data, and distribute the data packet to the data concentrator 20 as an event subscriber through the gateway 30;
an event management unit for storing and managing the coordination awareness relationship between the data concentrators 20.
Specifically, the server 40 fuses the short-term cooperative sensing model to cooperatively detect the bulge expansion of the parallel capacitor device. Fig. 3 is a schematic diagram of a short-lived collaborative awareness model according to an embodiment of the present invention, and referring to fig. 3 in conjunction with fig. 1, the short-lived collaborative awareness model is composed of an event tuple space 44, an event receiver 41, an event filter 42, an event distributor 43, an event subscriber 32, and an event publisher 31. The event tuple space 44 is used to organize and manage the work of the event publisher 31 and the event subscriber 32 in cooperation with the event receiver 41, the event filter 42, and the event distributor 42. The event receiver 41 is used for analytically verifying the correctness of the received data. The event filter 42 is used to check if there are event subscribers interested in the event. The event distributor 43 is used to distribute events to all event subscribers 32 interested in this event. Wherein the event tuple space 44, the event receiver 41, the event filter 42 and the event distributor 43 are disposed in the server 40, respectively corresponding to the event management unit, the event receiving unit, the event filtering unit and the event distributing unit. One data concentrator 20 is both an event publisher 31 and an event subscriber 32; when the event publisher 31 is used, the ambient temperature and the bulge expansion data (surface pressure data) of a plurality of surfaces of the capacitor unit are collected periodically and packed for publication; or as an event subscriber 32, may subscribe to ambient temperature and bump inflation data events of their interest, such as other concentrator events within the same parallel capacitor device or one or more concentrator events in other parallel capacitor devices within a 1 km range. The data concentrator 20, which is a subscriber to the event, receives an event of interest, and can analyze the data to derive its own risk level and trigger different actions.
Illustratively, the data concentrator 20, which is an event subscriber, determines whether the ambient temperature in the data packet exceeds a preset temperature, and determines whether the surface pressure data exceeds preset pressure data; if both items exceed the two, determining that the expansion risk level of the capacitor unit corresponding to the data concentrator 20 as the event subscriber is a high risk; if one exceeds the above threshold, determining that the expansion risk level of the capacitor unit corresponding to the data concentrator 20 as the event subscriber is an intermediate risk; if none of the data concentrator units exceeds the predetermined threshold, the expansion risk level of the capacitor unit corresponding to the data concentrator 20 as the event subscriber is determined to be low. When at least one item exceeds, the data concentrator 20, as an event subscriber, collects the ambient temperature of itself and surface pressure data of the pressure sensor 10 connected thereto, and determines whether a bulge event occurs in the corresponding capacitor unit according to the ambient temperature and the surface pressure data. The value of the expansion data of the capacitor unit is fully utilized, the false detection rate of manual routing inspection is reduced, the emergency response period is shortened, and the relation compactness of the expansion of the capacitor unit is improved.
Optionally, each data concentrator 20 collects surface pressure data of a capacitor unit, the capacitor unit includes a plurality of surfaces, and each surface is provided with at least one pressure sensor 10.
Specifically, the capacitor unit includes a plurality of surfaces. Each surface can be provided with a pressure sensor 10, so that pressure data of each surface of the capacitor unit can be collected, and the omnibearing monitoring of the capacitor unit is realized. Multiple pressure sensors 10 may be provided on each surface to improve the accuracy of the monitoring of the expansion of the capacitor unit. Each data concentrator 20 collects the surface pressure data of one capacitor unit correspondingly, that is, all the pressure sensors 10 arranged on each surface of the same capacitor unit are connected with the same data concentrator 20; the pressure sensor 10 to which each data concentrator 20 is connected is arranged on a corresponding one of the capacitor units. For example, the data concentrator 20 may connect 16 pressure sensors 10, with 16 pressure sensors 10 disposed on a surface of one of the capacitor units, the capacitor unit including 4 surfaces, and each of the surfaces may be provided with 4 pressure sensors 10. The data concentrators 20 have a one-to-one correspondence relationship with the capacitor units, so that the two data concentrators 20 having a cooperative sensing relationship have a cooperative sensing relationship with the two capacitor units corresponding to each other, and the data transceiving relationship can be simplified. When one capacitor unit is expanded and bulges, if the expansion risk of another capacitor unit in the same parallel capacitor device is judged, the server 40 only needs to transmit the data packet to the data concentrator 20 corresponding to the other capacitor unit.
Optionally, each data concentrator 20 collects surface pressure data of a plurality of capacitor units, each capacitor unit comprising a plurality of surfaces, each surface being provided with at least one pressure sensor 10; the data concentrator 20 is located in the same parallel capacitor arrangement for a plurality of collected capacitor cells.
Specifically, each data concentrator 20 may collect surface pressure data for a plurality of capacitor cells, i.e., the data concentrator 20 is in a one-to-many relationship with the capacitor cells. The data concentrator 20 is located in the same parallel capacitor arrangement for a plurality of collected capacitor cells. The relationship of data concentrator 20 to the parallel capacitor arrangement may be such that one data concentrator 20 collects surface pressure data for each capacitor cell in a parallel capacitor arrangement, while one parallel capacitor arrangement collects data from one data concentrator 20. It is also possible to collect the surface pressure data of a part of the capacitor cells in one parallel capacitor device for one data concentrator 20, and in this case, a plurality of data concentrators 20 may collect data for one parallel capacitor device. In the embodiment of the present invention, the data concentrator 20 and the plurality of capacitor units are in a one-to-many relationship, so that the number of the data concentrators 20 can be reduced, and the cost of the device can be reduced.
Note that, there is a one-to-one correspondence relationship between the data concentrator 20 and the capacitor unit, and there is a one-to-many relationship between the data concentrator 20 and the capacitor unit. The capacitor units correspondingly collected by the two data concentrators 20 with the cooperative sensing relationship may be respectively located in two parallel capacitor devices, or may be located in the same parallel capacitor device; each of the data concentrators 20 includes at least one data concentrator 20 in cooperative sensing relationship therewith; the distance between the data concentrators 20 in a cooperative perceptual relationship with each other is less than or equal to 1000 meters. When the number of data concentrators 20 is large, the number of gateways 30 may be large, and each gateway 30 may be communicatively connected to a plurality of data concentrators 20.
Optionally, the capacitor expansion monitoring system further comprises:
a plurality of temperature sensors, the pressure sensor 10 being disposed on the surface of the capacitor unit, each capacitor unit being provided with at least one temperature sensor; the temperature sensor is used for detecting surface temperature data of the capacitor unit;
the data concentrator 20 is also configured to collect surface temperature data sent by the temperature sensor connected thereto and send the surface temperature data to the server 40 via the gateway 30, so as to send the surface temperature data to the data concentrator 20 as an event subscriber.
Specifically, the ambient temperature has a certain correlation with the temperature of the capacitor unit. The ambient temperature has a certain influence on the performance of the capacitor unit, and when the ambient temperature exceeds a certain temperature, the expansion and bulging events of the capacitor unit can be caused. After the expansion bulge event occurs in the capacitor unit, the temperature of the capacitor may rise, and the temperature of the capacitor may rise, which may cause the ambient temperature to rise, and then the rest capacitor units in the same parallel capacitor device may have the same risk or the peripheral parallel capacitor device may also have the same risk. Therefore, the risk level of expansion can be judged by combining the surface temperature data of the capacitor unit, and the accuracy of risk level analysis is further improved.
An embodiment of the present invention further provides a capacitor expansion monitoring method, which is implemented by the capacitor expansion monitoring system according to any of the above embodiments, fig. 4 is a flowchart of the capacitor expansion monitoring method according to the embodiment of the present invention, and with reference to fig. 4, the capacitor expansion monitoring method includes:
s110, detecting surface pressure data of the capacitor unit by a pressure sensor; the number of the pressure sensors is multiple, and the pressure sensors are arranged on the surface of the capacitor unit in the parallel capacitor device; the parallel capacitor device comprises a plurality of capacitor units connected in parallel, and each capacitor unit is at least provided with a pressure sensor.
S120, detecting the environmental temperature of the environment by the data concentrator and collecting surface pressure data of the pressure sensor connected with the data concentrator; the number of the data concentrators is at least two, and each pressure sensor is correspondingly connected with one data concentrator.
S130, the data concentrator sends the environmental temperature and the surface pressure data to a server through a gateway; the gateway is connected with the server and the data concentrator.
S140, the server forms a data packet by the surface pressure data and the environmental temperature sent by the same data concentrator; and according to the cooperative perception relationship among the data concentrators, sending the data packet of the data concentrator serving as the event publisher to the data concentrator serving as the event subscriber through the gateway.
And S150, the data concentrator which is an event subscriber determines the expansion risk level of the capacitor unit monitored by the data concentrator according to the data in the data packet.
According to the capacitor expansion monitoring method provided by the embodiment of the invention, the environmental temperature of the environment is detected through at least two data concentrators, and the surface pressure data of a pressure sensor connected with the data concentrators is collected; sending the environmental temperature and surface pressure data to a server through a gateway; the server can send the data packet of the data concentrator serving as the event publisher to the data concentrator serving as the event subscriber through the gateway according to the cooperative perception relationship among the data concentrators, so that the data concentrator serving as the event subscriber determines the expansion risk level of the capacitor unit monitored by the data concentrator according to the data in the data packet. All the data concentrators can communicate and are connected through a short-acting type cooperative sensing method. The value of the expansion data of the capacitor unit is fully utilized, the false detection rate of manual routing inspection is reduced, the emergency response period is shortened, and the relation compactness of the expansion of the capacitor unit is improved.
Optionally, the data concentrator as an event subscriber determines the expansion risk level of the self-monitored capacitor unit according to the data in the data packet and by combining the self-detected ambient temperature data and the collected surface pressure data, and includes:
judging whether the environmental temperature in the data packet exceeds a preset temperature or not, and judging whether the surface pressure data exceeds preset pressure data or not;
if both items exceed the two items, determining that the expansion risk level of the capacitor unit collected by the data concentrator as the event subscriber is high risk;
if one item is exceeded, determining the expansion risk level of the capacitor unit collected by the data concentrator as the event subscriber as the medium risk;
and if the expansion risk level of the capacitor unit collected by the data concentrator as the event subscriber is not exceeded, determining the expansion risk level of the capacitor unit as a low risk.
Optionally, after determining that at least one item exceeds, further comprising:
the data concentrator, as an event subscriber, collects the ambient temperature of the data concentrator itself and collects surface pressure data of the pressure sensors connected thereto, and determines whether a bulge event occurs in the corresponding capacitor unit according to the ambient temperature and the surface pressure data.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A capacitor expansion monitoring system, comprising:
a plurality of pressure sensors disposed on a surface of the capacitor cells in the parallel capacitor device; wherein the parallel capacitor device comprises a plurality of capacitor units connected in parallel, and each capacitor unit is at least provided with one pressure sensor; the pressure sensor is used for detecting surface pressure data of the capacitor unit;
each pressure sensor is correspondingly connected with one data concentrator; the data concentrator is used for detecting the ambient temperature of the environment and collecting surface pressure data of the pressure sensor connected with the data concentrator;
a gateway and a server, the gateway and the server and the data concentrator connected, the data concentrator further for sending the ambient temperature and the surface pressure data to the server through the gateway;
the server is used for forming a data packet by the surface pressure data and the ambient temperature sent by the same data concentrator; and according to the cooperative perception relationship among the data concentrators, sending the data packet of the data concentrator serving as the event publisher to the data concentrator serving as the event subscriber through the gateway, so that the data concentrator serving as the event subscriber determines the expansion risk level of the capacitor unit monitored by the data concentrator according to the data in the data packet.
2. The capacitor expansion monitoring system of claim 1, wherein each data concentrator collects surface pressure data for a capacitor unit, the capacitor unit comprising a plurality of surfaces, each surface having at least one pressure sensor disposed thereon.
3. The capacitor expansion monitoring system of claim 1, wherein each of said data concentrators collects surface pressure data for a plurality of capacitor units, said capacitor units comprising a plurality of surfaces, each surface having at least one pressure sensor disposed thereon; the data concentrator is located in the same parallel capacitor device corresponding to the collected capacitor units.
4. Capacitor expansion monitoring system according to claim 2 or 3,
the number of the parallel capacitor devices is multiple, and the capacitor units correspondingly collected by the two data concentrators with the cooperative sensing relation are respectively positioned in the two parallel capacitor devices and/or in the same parallel capacitor device;
each data concentrator comprises at least one data concentrator which is in cooperative perception relationship with the data concentrator; the distance between the data concentrators in the cooperative sensing relationship is less than or equal to 1000 meters.
5. The capacitor expansion monitoring system of claim 1, further comprising:
a plurality of temperature sensors, the pressure sensors being disposed on surfaces of the capacitor units, each capacitor unit being provided with at least one temperature sensor; the temperature sensor is used for detecting surface temperature data of the capacitor unit;
the data concentrator is also used for collecting surface temperature data sent by a temperature sensor connected with the data concentrator, and sending the surface temperature data to the server through the gateway so as to send the surface temperature data to the data concentrator serving as an event subscriber.
6. The capacitor expansion monitoring system of claim 1, wherein the number of gateways is at least two, each gateway communicatively coupled to at least one of the data concentrators.
7. The capacitor expansion monitoring system of claim 1, wherein the server comprises:
the event receiving unit is used for receiving the data sent by the data concentrator and analyzing and verifying the correctness of the received data;
the event filtering unit is used for filtering out data which are interested by the event subscriber according to the collaborative perception relationship among the data concentrators;
the event distribution unit is used for forming the filtered data into a data packet and distributing the data packet to a data concentrator serving as an event subscriber through the gateway;
and the event management unit is used for storing and managing the cooperative perception relationship among the data concentrators.
8. A method of monitoring capacitor expansion, comprising:
the pressure sensor detects surface pressure data of the capacitor unit; the number of the pressure sensors is multiple, and the pressure sensors are arranged on the surface of the capacitor unit in the parallel capacitor device; wherein the parallel capacitor device comprises a plurality of capacitor units connected in parallel, and each capacitor unit is at least provided with one pressure sensor;
the data concentrator detects the ambient temperature of the environment and collects surface pressure data of the pressure sensor connected with the data concentrator; the number of the data concentrators is at least two, and each pressure sensor is correspondingly connected with one data concentrator;
the data concentrator sends the ambient temperature and the surface pressure data to the server through a gateway; the gateway is connected with the server and the data concentrator;
the server forms a data packet by the surface pressure data and the ambient temperature sent by the same data concentrator; according to the cooperative perception relationship among the data concentrators, a data packet of the data concentrator serving as an event publisher is sent to the data concentrator serving as an event subscriber through the gateway;
the data concentrator, which is an event subscriber, determines the inflation risk level of the capacitor unit that it monitors from the data in the data packet.
9. The capacitor expansion monitoring method according to claim 8, wherein the data concentrator as an event subscriber determines an expansion risk level of the self-monitored capacitor unit according to the data in the data packet and combining the self-detected ambient temperature data and the collected surface pressure data, and comprises:
the data concentrator serving as an event subscriber judges whether the environmental temperature in the data packet exceeds a preset temperature and judges whether the surface pressure data exceeds preset pressure data;
if both items exceed the two items, determining that the expansion risk level of the capacitor unit collected by the data concentrator as the event subscriber is high risk;
if one item is exceeded, determining the expansion risk level of the capacitor unit collected by the data concentrator as the event subscriber as the medium risk;
and if the expansion risk level of the capacitor unit collected by the data concentrator as the event subscriber is not exceeded, determining the expansion risk level of the capacitor unit as a low risk.
10. The method for capacitor expansion monitoring of claim 9, wherein determining at least one overshoot further comprises:
the data concentrator serving as an event subscriber collects the ambient temperature of the data concentrator and surface pressure data of a pressure sensor connected with the data concentrator, and whether a bulge expansion event occurs in a corresponding capacitor unit is determined according to the ambient temperature and the surface pressure data.
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