CN115540939A - Intelligent monitoring system of flexible support of photovoltaic power plant - Google Patents
Intelligent monitoring system of flexible support of photovoltaic power plant Download PDFInfo
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- CN115540939A CN115540939A CN202211140508.2A CN202211140508A CN115540939A CN 115540939 A CN115540939 A CN 115540939A CN 202211140508 A CN202211140508 A CN 202211140508A CN 115540939 A CN115540939 A CN 115540939A
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- G—PHYSICS
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- G—PHYSICS
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- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
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Abstract
The invention discloses a monitoring system of a photovoltaic power station flexible support, which comprises: a stress sensor for sensing stress of the photovoltaic power plant flexible support; a displacement sensor for sensing displacement of the photovoltaic power plant flexible support; the inclination angle sensor is used for sensing the inclination angle of the photovoltaic power station flexible support; and the data acquisition and analysis module is used for acquiring and analyzing the signals sensed by the sensors. According to the technical scheme disclosed by the invention, the working personnel can monitor all parameters at the connecting part of the flexible support structure of the photovoltaic power station in real time, so that the potential safety hazard of the photovoltaic flexible support can be known in time, and unnecessary casualties and economic losses are avoided.
Description
Technical Field
The invention belongs to the technical field of new energy of photovoltaic power generation, and particularly relates to an intelligent monitoring system for a flexible support of a photovoltaic power station.
Background
The photovoltaic power station is installed in the field without barriers, at high places such as a roof or an ascending slope and the like, and the solar illumination is good. In these occasions, the places greatly affected by strong wind are the places, and typhoons and earthquakes are the biggest hidden dangers for damaging the photovoltaic square matrix. The wind pressure is in direct proportion to the square of the wind speed, and the typhoon with high speed can generate huge wind pressure. The wind pressure on the windward side is integrated along the surface, and the large-area flaky photovoltaic square matrix is subjected to overlarge wind pressure, so that the assembly frame, the fixed pressing plate and the bracket cannot resist. In addition, strong pulsating wind and the self-vibration periods of the structures are close to each other, so that resonance response is generated, and the whole set of mounting support is easy to collapse.
A flexible support of a photovoltaic power station adopts a large-span multi-span structure, a prestressed steel wire rope is stretched between fixed points at two ends of an end part section and a middle part section in the structure, an end part foundation and a middle part foundation are arranged at a proper position and the prestressed steel stranded wires are tensioned, and the fixed points adopt rigid structures and outer side inclined pulling steel stranded wires to provide supporting counter force. Although the flexible support system has the advantages of large span and flexible and adjustable span range, the height of the end part upright post and the middle upright post is high, the span is large, and the stress is complex, so that major personnel safety accidents and property loss can be caused once collapse occurs.
In view of this, in order to avoid major personnel incident and loss of property, in order to make the safe and economic operation of the photovoltaic power plant that adopts flexible support, how to monitor photovoltaic power plant flexible support of pertinence becomes the technical problem that this field needs to solve urgently.
Disclosure of Invention
In order to solve the technical problem, the invention provides a monitoring system of a photovoltaic power station flexible support, which comprises:
a stress sensor for sensing stress of the photovoltaic power plant flexible support;
a displacement sensor for sensing displacement of the photovoltaic power plant flexible support;
the inclination angle sensor is used for sensing the inclination angle of the photovoltaic power station flexible support;
and the data acquisition and analysis module is used for acquiring and analyzing the signals sensed by the sensors.
Preferably, the first and second liquid crystal materials are,
the monitoring system also comprises a communication module which is used for sending the signals sensed by the sensors to a control room or other receiving devices outside the control room.
Preferably, the first and second liquid crystal materials are,
and the data acquisition and analysis module is also used for analyzing signals sensed by the sensors and judging whether any signal exceeds a first threshold value of early warning.
Preferably, the first and second liquid crystal materials are,
and the data acquisition and analysis module is also used for analyzing the signals sensed by the sensors and judging whether any signal exceeds a second alarm threshold value.
Preferably, the first and second liquid crystal materials are,
the monitoring system further comprises an early warning prompt module, which is used for: when the data acquisition and analysis module judges that a certain signal exceeds a first early warning threshold value, early warning prompt information is sent to the working personnel through a host of the control room, or early warning prompt information is sent to the working personnel through other receiving devices outside the control room.
Preferably, the first and second liquid crystal materials are,
the monitoring system further comprises an alarm module for: when the data acquisition and analysis module judges that a certain signal exceeds a second threshold value of alarm, sound and light alarm information is sent to the working personnel through a host of the control room, or sound and light alarm information is sent to the working personnel through other receiving devices outside the control room.
Preferably, the first and second liquid crystal materials are,
the signals sensed by the various sensors include: the anti-pulling force and displacement signals of the anchor rod.
In a preferred embodiment of the method of the invention,
the signals sensed by the various sensors include: the base stress signal of the middle or end.
In a preferred embodiment of the method of the invention,
the signals sensed by the various sensors include: a structural angle signal of the flexible stent.
Preferably, the first and second liquid crystal materials are,
and the data acquisition and analysis module is also used for judging whether early warning prompt or audible and visual alarm is needed according to the historical monitoring data and the current sensing signals of all the sensors.
Compared with the prior art, the invention has the following advantages:
according to the technical scheme disclosed by the invention, the working personnel can monitor all parameters at the connecting part of the flexible support structure of the photovoltaic power station in real time, so that the potential safety hazard of the photovoltaic flexible support can be known in time, and unnecessary casualties and economic losses are avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the principles of the invention;
FIG. 1 is a schematic diagram of a monitoring system in one embodiment of the present invention;
FIGS. 2A, 3A, 4A, 5A are schematic illustrations of the planar arrangement of various sensors at different monitoring points in various embodiments of the present invention;
2B, 3B, 4B, 5B are schematic illustrations of elevational distributions of various sensors at respective monitoring points corresponding to FIGS. 2A, 3A, 4A, 5A;
FIGS. 6A and 6B are schematic top and isometric views of a pentagonal pyramid in one embodiment of the invention;
fig. 7 is a schematic diagram of the lateral arrangement of the intermediate support, which is exemplified by a 400mm PHC pipe string, according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to fig. 1 to 7 and the following embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict. The technical solution of the present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Unless otherwise indicated, the illustrated exemplary embodiments/examples are to be understood as providing exemplary features of various details of some ways in which the technical concepts of the present invention may be practiced. Therefore, unless otherwise specified, the features of the various embodiments/examples may be additionally combined, separated, interchanged, and/or rearranged without departing from the technical concept of the present invention.
Cross-hatching and/or shading, which may be used in the drawings, is often used to clarify the boundaries between adjacent components. As such, unless otherwise noted, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for a particular material, material property, size, proportion, commonality between the illustrated components and/or any other characteristic, attribute, property, etc., of a component. Further, in the drawings, the size and relative sizes of components may be exaggerated for clarity and/or descriptive purposes. While example embodiments may be practiced differently, the specific process sequence may be performed in a different order than the described steps. For example, two consecutively described processes may be performed substantially simultaneously or in an order reverse to the order described. In addition, like reference numerals denote like parts.
When an element is referred to as being "on" or "over," "connected to" or "coupled to" another element, it can be directly on, connected or coupled to the other element or intervening elements may be present. However, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element, there are no intervening elements present. For purposes of this disclosure, the term "connected" may refer to physically connected, electrically connected, and the like, with or without intervening components.
For descriptive purposes, the invention may use spatially relative terms such as "below," under, "" above, "" upper, "" over, "" higher, "and" side (e.g., as in "side walls") to describe one component's relationship to another (other) component as illustrated in the figures. Spatially relative terms are intended to encompass different orientations of the device in use, operation, and/or manufacture in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "under. Moreover, the devices may be otherwise positioned (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, when the terms "comprises" and/or "comprising" and variations thereof are used in this specification, the presence of stated features, integers, steps, operations, elements, components and/or groups thereof are stated but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof. It is also noted that, as used herein, the terms "substantially," "about," and other similar terms are used as approximate terms and not as degree terms, and as such, are used to interpret inherent deviations in measured values, calculated values, and/or provided values that would be recognized by one of ordinary skill in the art.
In one embodiment, the present invention discloses a monitoring system for a photovoltaic power plant flexible mount, comprising:
a stress sensor for sensing stress of the photovoltaic power plant flexible support;
a displacement sensor for sensing displacement of the photovoltaic power plant flexible support;
the inclination angle sensor is used for sensing the inclination angle of the photovoltaic power station flexible support;
and the data acquisition and analysis module is used for acquiring and analyzing the signals sensed by the sensors.
For the embodiment, the technical scheme disclosed by the embodiment enables the working personnel to monitor all parameters of the connection part of the photovoltaic power station flexible support structure in real time, so that the potential safety hazard of the photovoltaic flexible support can be known timely, and unnecessary casualties and economic losses are avoided.
In one embodiment of the present invention,
the monitoring system also comprises a communication module which is used for sending the signals sensed by the sensors to a control room or other receiving devices outside the control room.
In one embodiment of the present invention,
the communication module is for example: a wireless transmission terminal receiver.
In one embodiment of the present invention,
and the data acquisition and analysis module is also used for analyzing signals sensed by the sensors and judging whether any signal exceeds a first threshold value of early warning.
In one embodiment of the present invention,
and the data acquisition and analysis module is also used for analyzing the signals sensed by the sensors and judging whether any signal exceeds a second alarm threshold value.
In one embodiment of the present invention,
the monitoring system further comprises an early warning prompt module, which is used for: when the data acquisition and analysis module judges that a certain signal exceeds a first early warning threshold value, early warning prompt information is sent to the working personnel through a host of the control room, or early warning prompt information is sent to the working personnel through other receiving devices outside the control room.
In one embodiment of the present invention,
the monitoring system further comprises an alarm module for: when the data acquisition and analysis module judges that a certain signal exceeds a second threshold value for alarming, the host computer of the control room sends acousto-optic alarm information to the working personnel, or other receiving devices outside the control room send acousto-optic alarm information to the working personnel.
In one embodiment of the present invention,
the signals sensed by the various sensors include: the anti-pulling force and displacement signals of the anchor rod.
Preferably, the first and second liquid crystal materials are,
the signals sensed by the various sensors include: stress signals of the upper and lower layer cables.
In one embodiment of the present invention,
the signals sensed by the various sensors include: a structural angle signal of the flexible stent.
In one embodiment of the present invention,
and the data acquisition and analysis module is also used for judging whether early warning prompt or audible and visual alarm is needed according to the historical monitoring data and the current sensing signals of all the sensors.
In one embodiment of the method of manufacturing the optical fiber,
the data acquisition and analysis module can judge whether any signal exceeds a first early warning threshold value or a second early warning threshold value, convert the signal sensed by each sensor into a digital signal, process at least a part of the digital signal to obtain at least one new output, and judge whether the output exceeds a corresponding early warning threshold value or a corresponding alarm threshold value, so as to judge whether early warning prompt or acousto-optic alarm is needed.
In one embodiment of the present invention,
the monitoring system of the photovoltaic power station flexible support becomes an intelligent monitoring system due to the capacity of the data acquisition and analysis module, the intelligent monitoring system can comprise various high-precision displacement sensors, stress sensors, inclination angle sensors, a wireless transmission terminal signal receiver, the data acquisition and analysis module, a display host and an audible and visual alarm, and the display host can be used for early warning and prompting. It can be appreciated that the higher the accuracy of the sensor, the more advantageous it is for monitoring, but a trade-off between cost and accuracy may be considered when actually deploying.
In one embodiment, referring to fig. 1,
the anchor rod anti-pulling force, the upper and lower layer cable stress and the flexible support structure angle data are acquired through the displacement sensor, the stress sensor and the inclination angle sensor and are wirelessly transmitted to a terminal database for analysis, and the data acquisition and analysis module can be a Central Processing Unit (CPU), a general processor, a coprocessor, a Digital Signal Processor (DSP), an application-specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA), or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The data collection and analysis module may also be a combination that performs a computational function, such as a combination comprising one or more microprocessors, a combination of DSPs and microprocessors, or the like.
In fig. 1, the wireless transmission terminal receiver is used to perform the receiving function: and acquiring the uplift resistance of the anchor rod, the stress of the upper and lower layer cables and the angle data of the flexible support structure through each sensor. In another embodiment, deformation data of the upper and lower layer cables can be further acquired through corresponding sensors.
In an implementation manner, the data collecting and analyzing module is not only used for obtaining the data information, but also taking the determined data information as historical monitoring data; and comparing the extracted real-time monitoring data information with historical monitoring data in a database and further calibrating:
constructing mapping of data value intervals with different data attributes and an early warning threshold interval to form a comparison data information database;
setting a sampling time interval for acquiring the anti-pulling force of an anchor rod of the flexible support system, the stress and deformation of an upper layer cable and a lower layer cable and the real-time monitoring data of the angle of the flexible support structure;
when the data values of all the data attributes of the comparison data information database fall into the corresponding data value intervals in the database, judging whether the monitoring data sampled in the sampling time interval falls into an early warning threshold interval mapped with the data value interval; and if the judged result is no, the monitoring data is less than or equal to 80% of the total sampling monitoring data, and the flexible support system gives an alarm.
Illustratively, the alarm thresholds for the monitored data are as follows:
alarm threshold value of anchor rod withdrawal resistance: when the monitoring numerical value of the pulling force of the anchor rod exceeds 25% of the initial pulling force, the system automatically sends out early warning alarm, and when the monitoring numerical value of the pulling force of the anchor rod exceeds 50% of the initial pulling force, the system automatically sends out danger alarm;
the alarm thresholds of the stress and deformation of the upper and lower layers of cables comprise a threshold in the allowable strength of the cable material and a threshold in the vertical and horizontal deformation of the cables:
when the cable stress monitoring value exceeds 80 percent of the maximum allowable strength value of the cable material, for example 1056MPa, the system automatically gives an alarm, and when the maximum allowable strength value of the cable material reaches 100 percent, for example 1320MPa, the system automatically gives a danger alarm;
alarm threshold of upper and lower layer cable deformation: when the cable deformation value exceeds 1/60 of the span of the bracket, the system gives out early warning alarm, and when the cable deformation value exceeds 1/30 of the span of the bracket, the system gives out danger alarm;
flexible support structure angle alarm threshold: when the angle change value of the cable structure exceeds 3 degrees, the system sends out early warning alarm, and when the angle change value exceeds 5 degrees, the system sends out danger alarm.
The following embodiments are combined with the corresponding figures, and the plane arrangement of the monitoring points of various sensors is as follows:
referring to figures 2A, 2B, 5A and 5B,
at either end bracket, arranged are: the device comprises a ground anchor deformation and stress measuring point, a cable stress measuring point of an upper layer or a lower layer prestressed cable, and a cable dip angle measuring point.
Referring to figures 3A, 3B, 4A and 4B,
at the pentapyramid between any end stent and the nearest intermediate stent from that end stent, there is arranged: aiming at the amplitude and displacement measuring points of the prestressed cable on the upper layer or the lower layer, and the method comprises the following steps:
close to this end bracket, there is also arranged: and measuring points for the amplitude and displacement of the upper layer or the lower layer of prestressed cables.
The pentagon pyramid department between two arbitrary adjacent intermediate supports has arranged: aiming at the amplitude and displacement measuring points of the upper layer or the lower layer of the prestressed cable, and the method comprises the following steps:
close to one of them middle support, still arrange: the amplitude and displacement measuring points for the upper or lower prestressed cables and the position of the middle bracket are additionally provided with: the cable stress measuring point of the upper layer or the lower layer prestressed cable and the dip angle measuring point.
It should be noted that the upper and lower prestressed cables are located at upper and lower spatial positions and are connected by a pentagonal pyramid. The object of the amplitude and displacement measurement is the prestressed cable. In each of the diagrams shown in fig. 2A to 5B, the arrangement of the measuring points at the end part or the middle part can realize the sensing of the base stress of the middle part and the end part. Further, fig. 6A and 6B respectively illustrate a top view and an isometric view of a pentagonal pyramid; fig. 7 shows a schematic view of the transverse arrangement of the intermediate support.
In summary, the invention discloses an intelligent monitoring system for a flexible support of a photovoltaic power station, which is used for monitoring parameters such as displacement, stress, angle and the like of a joint in real time on a flexible support structure, converting a physical signal into an electric signal and then sending the electric signal to a background for monitoring through a wireless network, so that an operator or other workers can monitor the parameters of the joint of the flexible support structure of the photovoltaic power station in real time, thereby being convenient for knowing potential safety hazards of the flexible support of the photovoltaic power station in time and avoiding unnecessary casualties and economic losses. This is a good indication: the system is necessary for safe and economic operation of the photovoltaic power station by adopting the flexible support, and has practicability.
In the description of the present specification, reference to the description of "one embodiment/mode", "some embodiments/modes", "example", "specific example", or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the present application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/modes or examples and features of the various embodiments/modes or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
It will be appreciated by those skilled in the art that the above embodiments are only for clarity of illustration of the invention, and are not intended to limit the scope of the invention. Other variations or modifications will be apparent to persons skilled in the art in light of the above disclosure and which are within the scope of the invention.
Claims (10)
1. A monitoring system for a photovoltaic power plant flexible support, comprising:
a stress sensor for sensing stress of the photovoltaic power plant flexible support;
a displacement sensor for sensing displacement of the photovoltaic power plant flexible support;
the inclination angle sensor is used for sensing the inclination angle of the photovoltaic power station flexible support;
and the data acquisition and analysis module is used for acquiring and analyzing the signals sensed by the sensors.
2. A monitoring system according to claim 1, characterized in that, preferably,
the monitoring system also comprises a communication module which is used for sending the signals sensed by the sensors to a control room or other receiving devices outside the control room.
3. The monitoring system of claim 1,
and the data acquisition and analysis module is also used for analyzing signals sensed by the sensors and judging whether any signal exceeds a first threshold value of early warning.
4. The monitoring system of claim 3,
and the data acquisition and analysis module is also used for analyzing the signals sensed by the sensors and judging whether any signal exceeds a second threshold value for alarming.
5. The monitoring system of claim 3,
the monitoring system further comprises an early warning prompt module, which is used for: when the data acquisition and analysis module judges that a certain signal exceeds a first early warning threshold value, early warning prompt information is sent to the working personnel through a host of the control room, or early warning prompt information is sent to the working personnel through other receiving devices outside the control room.
6. The monitoring system of claim 1,
the monitoring system further comprises an alarm module for: when the data acquisition and analysis module judges that a certain signal exceeds a second threshold value of alarm, sound and light alarm information is sent to the working personnel through a host of the control room, or sound and light alarm information is sent to the working personnel through other receiving devices outside the control room.
7. The monitoring system of claim 2,
the signals sensed by the various sensors include: the anti-pulling force of the anchor rod and the displacement signal.
8. The monitoring system of claim 2,
the signals sensed by the various sensors include: the base stress signal of the middle or end.
9. The monitoring system of claim 2,
the signals sensed by the various sensors include: a structural angle signal of the flexible stent.
10. The monitoring system of claim 1,
and the data acquisition and analysis module is also used for judging whether early warning prompt or audible and visual alarm is needed according to the historical monitoring data and the current sensing signals of all the sensors.
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| 胡聂雷;: "基坑水平位移监测数据分析", 土工基础, no. 01, pages 118 - 120 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117439542A (en) * | 2023-10-23 | 2024-01-23 | 珠海华成电力设计院股份有限公司 | High-bearing large-span photovoltaic flexible support structure |
| CN117439542B (en) * | 2023-10-23 | 2024-04-16 | 珠海华成电力设计院股份有限公司 | High-bearing large-span photovoltaic flexible support structure |
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| CN115540939B (en) | 2024-01-30 |
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