CN111293785A - Transformer substation power monitoring system - Google Patents
Transformer substation power monitoring system Download PDFInfo
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- CN111293785A CN111293785A CN202010191089.XA CN202010191089A CN111293785A CN 111293785 A CN111293785 A CN 111293785A CN 202010191089 A CN202010191089 A CN 202010191089A CN 111293785 A CN111293785 A CN 111293785A
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- 238000001514 detection method Methods 0.000 claims abstract description 32
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- 238000007726 management method Methods 0.000 claims description 21
- 238000007619 statistical method Methods 0.000 claims description 13
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- 238000004458 analytical method Methods 0.000 claims description 6
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- 230000005540 biological transmission Effects 0.000 description 2
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- 238000013475 authorization Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
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Abstract
The invention discloses a substation power monitoring system, which relates to the technical field of power monitoring and aims to solve the technical problem that once a substation breaks down, a worker cannot know and take measures in time at the first time and large loss is often caused due to the fact that the substation is wide in distribution range; the central control module comprises a central database and a data processing unit; the monitoring submodule comprises a transformer substation monitoring module for collecting detection data of each transformer substation and a communication module which is in communication connection with the transformer substation monitoring module and transmits the detection data to the data processing unit; the transformer substation monitoring module comprises a circuit breaker monitoring module, a relay monitoring module, an outgoing line control module, a temperature detection module and an abnormity alarm module. The effects of conveniently mastering the electric power condition of each transformer substation in real time and timely responding are achieved.
Description
Technical Field
The invention relates to the technical field of power monitoring, in particular to a substation power monitoring system.
Background
The transformer substation refers to a place for converting voltage and current, receiving electric energy and distributing electric energy in an electric power system, and the working state of electric power facilities in the transformer substation is checked in a manual inspection mode at present.
A conventional chinese patent with an authorization publication number of CN103001134B discloses a transformer substation, which includes a box body accommodating low-voltage equipment and high-voltage equipment for low-voltage and high-voltage power transmission and control, respectively; the transformer substation also comprises a transformation device which is positioned outside the box body and is electrically connected with low-voltage equipment and high-voltage equipment through a low-voltage wiring terminal and a high-voltage wiring terminal respectively, the transformation device is used for high-voltage and low-voltage conversion between the low-voltage equipment and the high-voltage equipment, and the low-voltage wiring terminal is a three-phase four-wire L-shaped and is horizontally arranged; the high-voltage wiring terminal is positioned in the box body and is obliquely arranged relative to the bottom of the box body; the low-voltage equipment, the high-voltage equipment and the transformation equipment form a structure shaped like the Chinese character 'pin'. The transformer substation is arranged in a mode of being in a shape like a Chinese character 'pin', and the size of the transformer substation is reduced by the aid of the external equipment of the transformer equipment, so that the transformer substation is compact in structure, cost is reduced, arrangement and transportation are facilitated, and heat dissipation efficiency of the transformer equipment is improved.
The above prior art solutions have the following drawbacks: due to the fact that the distribution range of the transformer substation is wide, once the transformer substation breaks down, workers cannot know and take measures timely at the first time, large loss is often caused, and therefore improvement is needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a transformer substation power monitoring system which has the advantages of being convenient for mastering the power condition of each transformer substation in real time and responding in time.
The above object of the present invention is achieved by the following technical solutions:
a transformer substation power monitoring system comprises a central control module located in a central transformer substation and monitoring submodules located in all the transformer substations; the central control module comprises a central database for storing detection data and a data processing unit for processing the detection data; the monitoring submodule comprises a transformer substation monitoring module and a communication module, wherein the transformer substation monitoring module is used for collecting detection data of each transformer substation, and the communication module is in communication connection with the transformer substation monitoring module and transmits the detection data to the data processing unit; the transformer substation monitoring module comprises a circuit breaker monitoring module for detecting and controlling the working state of a circuit breaker in the transformer substation, a relay monitoring module for monitoring the working parameters of a relay protection device in the transformer substation, an outgoing line control module for switching on and off the lighting equipment, a temperature detection module for monitoring the temperature data of a transformer in the transformer substation and an abnormity alarm module.
By adopting the technical scheme, the circuit breaker monitoring module monitors all parameters in the switch cabinet and the transformer, the relay monitoring module monitors all switching values and signals in the switch cabinet, the temperature detection module detects the temperature of the transformer, and all parameters of the switch cabinet for controlling and detecting the transformer are detected by the transformer substation monitoring module and fed back to the central control module through the communication module, so that the central substation can detect the working state of each substation and send out instructions without going deep into each place; the instruction is sent to each transformer substation monitoring module through the communication module, so that remote control can be realized, stable operation of a transformer substation is guaranteed, and reliability of power transmission and transformation is guaranteed.
The invention is further configured to: the data processing unit comprises a threshold setting module for setting a threshold value of the transformer abnormity alarm module and an alarm recording module for recording alarm occurrence time.
By adopting the technical scheme, the threshold setting module is used for setting the alarm threshold value, so that the alarm accuracy can be conveniently adjusted, and the monitoring system can be suitable for monitoring scenes in different environments; meanwhile, the alarm recording module is convenient for recording the time, the duration and the processing mode of each alarm, is convenient for later-stage examination and reference, and is convenient for later-stage report generation.
The invention is further configured to: the data processing unit also comprises a statistical analysis module for displaying the historical trend of the working parameters of the relay protection device and a report generation module for generating a transformer substation time report.
By adopting the technical scheme, the statistical analysis module carries out statistical analysis on each analog quantity in the transformer substation, and the report generation module automatically generates the reported report, so that the statistical analysis result is reflected in the report, the working condition of the transformer substation can be conveniently mastered by the staff, and the working condition of the transformer substation can be conveniently reported by the staff through the report.
The invention is further configured to: the statistical analysis module comprises a storage module for calling and temporarily storing data of a central database, a drawing module for drawing a curve and an early warning module for early warning based on a line graph.
By adopting the technical scheme, the statistical analysis module calls the detected data through the storage module and draws a line graph through the drawing module, so that the working state change of the transformer substation can be conveniently and visually observed; meanwhile, the loss degree of components in the transformer substation can be given according to the line graph, so that early warning is facilitated.
The invention is further configured to: and a component loss degree calculation module is arranged in the early warning module and is used for calculating the loss degree of the components according to the time line graph.
By adopting the technical scheme, the component loss calculation module subtracts the service time from the rated service time according to the line graph of the service time of the component, and multiplies the service time by the corresponding weight when the component is in overvoltage, overcurrent and overload, so that the loss of the component is obtained, early warning is performed before the component is damaged, an operator is prompted to replace the component, and the delay use of a power supply line caused by sudden damage of the component is prevented.
The invention is further configured to: the central control module also comprises a central management unit, and the central management unit comprises a user authority management module for managing user authority, a printing module for printing report data, a system parameter setting module and an alarm auxiliary module.
By adopting the technical scheme, the central management unit in the central control module effectively sets each module of the system, thereby being convenient for improving the fluency and the safety of the whole system.
The invention is further configured to: the print module includes a timed print module for setting a print time period and an event driven module for setting a driven print event.
By adopting the technical scheme, the timing printing module in the printing module can automatically drive the printer to print the report according to the preset time, so that a worker can conveniently master the condition of each substation through the report; in addition, the event driving module can start the printer to print the report when the preset event occurs in the transformer substation, so that the integrity of the report is ensured.
The invention is further configured to: the system parameter setting module comprises a data updating period setting module, a data storage period setting module and a printing setting module for setting printing parameters.
By adopting the technical scheme, the data updating period setting module can be used for setting the period of data updating, so that the time length of data staying and displaying can be conveniently adjusted, and workers can conveniently master the time length; the data storage period setting module can set the period of data storage, so that expired data can be deleted in time conveniently, and enough storage space is reserved; the print setting module facilitates setting a time of print timing and an event that triggers the event driven module.
The invention is further configured to: the alarm assisting module comprises a reason analyzing module for providing possible reasons, a recommending module for recommending a solution and an alarm setting module for setting alarm priority.
By adopting the technical scheme, the alarm auxiliary module is convenient to set auxiliary items for alarming, and when the alarm occurs, the reason analysis module analyzes possible reasons and the suggestion module gives a suggestion for processing according to the prior processing mode; when a plurality of alarms occur, the alarm setting module is used for setting the alarm priority and giving an alarm to the part with the maximum danger in advance, so that the working stability of the transformer substation is further ensured.
The invention is further configured to: the user authority management module comprises an identity authentication module, a user and password management module based on identity authentication and an operation recording module for recording operation.
By adopting the technical scheme, the identity authentication module is used for authenticating the identity of the user accessing the central control module, and can set and manage the user and the password corresponding to the user through the identity authority of the administrator; in the process of user operation, the operation recording module records each step of operation of the user, thereby ensuring the safety of the system.
In conclusion, the beneficial effects of the invention are as follows:
the transformer substation monitoring module monitors parameters of the transformer substation and transmits the parameters to the central control module of the central transformer substation through the communication module for processing and controlling, so that workers of the central transformer substation can know and actively take measures to maintain at the first time when alarm occurs, and loss caused by time delay is reduced.
Drawings
FIG. 1 is a schematic diagram illustrating physical connection of a substation power monitoring system according to an embodiment;
FIG. 2 is a schematic diagram for showing a physical connection structure at a monitoring submodule in an embodiment;
FIG. 3 is a block diagram of a substation power monitoring system according to an embodiment;
FIG. 4 is a block diagram showing the structure of a central management unit according to an embodiment.
In the figure: 1. a central control module; 2. a monitoring submodule; 21. a communication module; 22. a transformer substation monitoring module; 221. a circuit breaker monitoring module; 222. a relay monitoring module; 223. an outgoing line control module; 224. a temperature detection module; 225. an anomaly alarm module; 3. a central database; 4. a data processing unit; 41. a threshold setting module; 42. an alarm recording module; 43. a statistical analysis module; 431. a storage module; 431. a drawing module; 433. an early warning module; 4331. a component loss calculation module; 44. a report generation module; 5. a central management unit; 51. a user authority management module; 511. an identity verification module; 512. a user and password management module; 513. an operation recording module; 52. a printing module; 521. a timing printing module; 522. an event-driven module; 53. a system parameter setting module; 531. a data update period setting module; 532. a data storage period setting module; 533. an operation recording module; 54. an alarm auxiliary module; 541. a cause analysis module; 542. a suggestion module; 543. and an alarm setting module.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example (b):
a transformer substation power monitoring system, refer to fig. 1, which comprises a central control module 1 located in a central transformer substation and monitoring submodules 2 located in each transformer substation; the central control module 1 comprises a central database 3 for storing detection data and a data processing unit 4 for processing the detection data, and the central database 3 is connected to the internet through a router, so that staff can conveniently access the internet from the cloud.
Referring to fig. 2 and 3, the monitoring submodule 2 includes a substation monitoring module 22 for collecting detection data of each substation and a communication module 21 communicatively connected to the substation monitoring module 22 to transmit the detection data to the data processing unit 4, the communication module 21 is an optical fiber switch, and the monitoring submodule 2 performs data interaction with the central control module 1 through the optical fiber switch.
Referring to fig. 1 and 2, a high-voltage switch cabinet, a low-voltage switch cabinet and a low-voltage compensation cabinet are installed in the transformer substation, and the high-voltage switch cabinet, the low-voltage switch cabinet and the low-voltage compensation cabinet are all connected with a transformer substation monitoring module 22 through a 485 bus, namely, a communication manager, the communication manager is connected with an industrial ethernet switch, and the industrial ethernet switch is connected with an optical transceiver. The communication manager detects parameters of the high-voltage switch cabinet, the low-voltage switch cabinet and the low-voltage compensation cabinet and uploads the detection data to the central database 3 through the industrial Ethernet switch.
Referring to fig. 3, the substation monitoring module 22 includes a breaker monitoring module 221 for detecting and controlling an operating state of a breaker in the substation, a relay monitoring module 222 for monitoring an operating parameter of a relay protection device in the substation, an outgoing line control module 223 for switching an outgoing line device, a temperature detection module 224 for monitoring temperature data of a transformer in the substation, and a transformer abnormality alarm module 225.
Referring to fig. 3, the circuit breaker monitoring module 221 detects the closing and opening states of each circuit breaker in the high-voltage switch cabinet, the low-voltage switch cabinet and the low-voltage compensation cabinet through the communication manager, and detects the operation time of the circuit breaker; the circuit breaker monitoring module 221 implements switching on and switching off of a circuit breaker in a remote control switch cabinet through a communication manager, and the relay monitoring module 222 is configured to store detection data obtained by detection in the central database 3 for calling.
Referring to fig. 3, the relay monitoring module 222 is configured to detect the current amount, the voltage amount, the frequency, the power factor, the electricity amount, the active power and the reactive power detected by the relay protection device through the communication manager, and upload the detected data to the central database 3 in time for storage.
Referring to fig. 3, the outgoing line control module 223 monitors the on-off state of the lighting device and the weak current device such as the cooling fan of the substation through the detection of the communication manager, and controls the low-voltage outgoing line cabinet to control the lighting device and the cooling fan through the detection of the communication manager, so that the normal operation of the transformer in the substation is ensured.
Referring to fig. 3, the temperature detection module 224 is a thermocouple mounted on the transformer, and the temperature detection module 224 is connected to the communication manager through a 485 bus to transmit the temperature data of the transformer to the central database 3 for storage for later use.
Referring to fig. 3, the abnormality alarm module 225 is disposed in the switch cabinet, and the abnormality alarm module 225 sends an alarm signal to the data processing unit 4 through the communication manager when analog quantities such as current, load, voltage, and temperature exceed threshold values, so as to prompt a worker of an accident position in time. The substation monitoring module 22 monitors the working state of the substation in real time, transmits the detection data to the central database 3 for storage, and sends an alarm when the detection data exceeds a threshold value to prompt an operator to respond in time.
Referring to fig. 3, the data processing unit 4 is an industrial computer, the data processing unit 4 includes a threshold setting module 41 for setting a threshold value of the transformer abnormality alarm module 225 and an alarm recording module 42 for recording an alarm occurrence time, and the threshold setting module 41 may receive an alarm threshold value input by an operator and transmit the alarm threshold value to the switch cabinet, so as to modify the alarm threshold value of the switch cabinet. The alarm recording module 42 is used for recording the operation of remote control, the time of each alarm and the duration of the alarm, and recording the handling mode of the alarm event.
Referring to fig. 3, the substation monitoring module 22 further includes a statistical analysis module 43 for displaying historical trends of operating parameters of the relay protection device and a report generation module 44 for generating a substation time report. The statistical analysis module 43 is configured to perform statistics on analog quantity data of voltage, current, load, power, and the like stored in the central database 3, and perform analysis based on the statistical data. The report generation module 44 generates reports according to the data recorded by the alarm recording module 42 and the detected data obtained by monitoring, so as to facilitate later-stage storage and reference.
Referring to fig. 3, the statistical analysis module 43 includes a storage module 431 calling the data of the central database 3 and temporarily storing the data, a drawing module 431 for drawing a curve, and an early warning module 433 performing early warning based on a line graph. The storage module 431 calls the historical detection data in the center module to the storage module 431, the drawing module 431 draws a line graph, and the early warning module 433 analyzes the line graph, so that the durability of the component is analyzed.
Referring to fig. 3, a component loss calculation module 4331 is disposed inside the early warning module 433, and the component loss calculation module 4331 is configured to calculate a loss degree of a component according to a time-line diagram. The component loss calculation module 4331 determines the loss of the component by subtracting the actual operation time from the safe operation time based on the safe operation time given by the component and multiplying the time proportion of the over-current, over-voltage and over-load operation by the corresponding weight, wherein the weight coefficient is determined according to the proportion of the over-voltage, over-current or over-load and the rated load. The early warning is made in advance before the components and parts are damaged, the alarm is given when the safe operation time is zero or negative, the operator is prompted to replace the parts in time, and the loss caused by sudden damage of the components and parts is reduced.
Referring to fig. 3 and 4, the central control module 1 further includes a central management unit 5, and the central management unit 5 includes a user authority management module 51 for managing user authority, a printing module 52 for printing report material, a system parameter setting module 53 and an alarm assisting module 54. The printing module 52 comprises a timed printing module 521 for setting a printing time period and an event driving module 522 for setting a driving printing event, and the timed printing module 521 can automatically print according to the time period input by a user; the event driving module 522 drives the printer to automatically print when a predetermined event occurs.
Referring to fig. 4, the system parameter setting module 53 includes a data update period setting module 531, a data storage period setting module 532, and a print setting module 533 which sets print parameters. The data update period setting module 531 is configured to set a period for updating data displayed on the display screen, so as to display the detected data in real time. The data storage period setting module 532 is used for setting a period for detecting data storage, and compressing and deleting useless data periodically to ensure sufficient storage space. The print setting module 533 is used to set the time when the timing print module 521 prints, and the object of printing, so that the print module 52 can input the print time and set the driving event.
Referring to fig. 4, the alarm assistance module 54 includes a reason analysis module 541 for providing possible reasons, a recommendation module 542 for recommending solutions, and an alarm setting module 543 for setting alarm priorities. The reason analysis module 541 automatically provides the reason for possible errors upon alarm for reference by maintenance personnel. The advisory module 542 presents solutions recommended by maintenance personnel based on the treatment modalities recorded by the alarm recording module 42. The alarm setting module 543 is used for setting the priority of alarm, so that alarm is given according to the priority when alarm is given at different positions at the same time.
Referring to fig. 4, the user authority management module 51 includes an authentication module 511, an authentication-based user and password management module 512, and an operation recording module 513 for recording operations. The identity verification module 511 is used to verify the identity of the user accessing the central database 3. The user and password management module 512 is used for managing user accounts and user passwords, so as to facilitate addition and modification. The operation recording module 513 is configured to record operations performed by the authenticated user on the entire system, so as to facilitate later verification.
The working principle is as follows:
in the working process of the transformer substation, the transformer substation monitoring module 22 can monitor various states of the transformer and the switch cabinet in real time and transmit detection data obtained by monitoring to the central control module 1 through the communication module 21 for data processing.
When the voltage, current, load or temperature of the transformer exceeds the preset value, the alarm signal of the switch cabinet is transmitted to the central control module 1 through the transformer substation monitoring module 22 and the alarm is given through the genetic alarm module. The staff of central control module 1 can in time learn and in time send out maintenance personal and in time overhaul, thereby maintenance personal salvagees according to the reference suggestion that suggestion module 542 given and has guaranteed the safe and stable operation of transformer substation.
When the monitoring system monitors the components and the transformer, the early warning module 433 analyzes the detection data acquired by the statistical analysis module 43, analyzes the durability of the components and the transformer by the component loss calculation module 4331, and sends out early warning before damage, so that the components and the transformer are timely replaced.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. The utility model provides a transformer substation's electric power monitored control system which characterized in that: the system comprises a central control module (1) positioned in a central substation and monitoring submodules (2) positioned in all substations; the central control module (1) comprises a central database (3) for storing detection data and a data processing unit (4) for processing the detection data; the monitoring submodule (2) comprises a transformer substation monitoring module (22) used for collecting detection data of each transformer substation and a communication module (21) which is in communication connection with the transformer substation monitoring module (22) and transmits the detection data to the data processing unit (4); the transformer substation monitoring module (22) comprises a breaker monitoring module (221) for detecting and controlling the working state of a breaker in the transformer substation, a relay monitoring module (222) for monitoring the working parameters of a relay protection device in the transformer substation, an outgoing line control module (223) for switching weak current equipment, a temperature detection module (224) for monitoring the temperature data of a transformer in the transformer substation and an abnormity alarm module (225).
2. The substation power monitoring system of claim 1, wherein: the data processing unit (4) comprises a threshold setting module (41) for setting a threshold value of the transformer abnormity alarm module (225) and an alarm recording module (42) for recording alarm occurrence time.
3. The substation power monitoring system of claim 1, wherein: the data processing unit (4) further comprises a statistical analysis module (43) for displaying historical trends of working parameters of the relay protection device and a report generation module (44) for generating a substation time report.
4. A substation power monitoring system according to claim 3, characterized in that: the statistical analysis module (43) comprises a storage module (431) for calling data of the central database (3) and temporarily storing the data, a drawing module (431) for drawing a curve and an early warning module (433) for early warning based on a line graph.
5. The substation power monitoring system of claim 4, wherein: the early warning module (433) is internally provided with a component loss degree calculation module (4331), and the component loss degree calculation module (4331) is used for calculating the loss degree of components according to a time line diagram.
6. The substation power monitoring system of claim 1, wherein: the central control module (1) further comprises a central management unit (5), and the central management unit (5) comprises a user authority management module (51) for managing user authority, a printing module (52) for printing report data, a system parameter setting module (53) and an alarm auxiliary module (54).
7. The substation power monitoring system of claim 6, wherein: the user authority management module (51) comprises an identity authentication module (511), an identity authentication-based user and password management module (512) and an operation recording module (513) for recording operations.
8. The substation power monitoring system of claim 6, wherein: the print module (52) includes a timed print module (521) for setting a print time period and an event driven module (522) for setting a driven print event.
9. The substation power monitoring system of claim 6, wherein: the system parameter setting module (53) includes a data update period setting module (531), a data storage period setting module (532), and a print setting module (533) that sets print parameters.
10. The substation power monitoring system of claim 6, wherein: the alarm assistance module (54) includes a reason analysis module (541) for providing possible reasons, a recommendation module (542) for recommending solutions, and an alarm setting module (543) for setting alarm priorities.
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| CN113157526A (en) * | 2021-04-25 | 2021-07-23 | 珠海市鸿瑞信息技术股份有限公司 | Log auditing system based on power monitoring system |
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| CN112365011A (en) * | 2020-11-09 | 2021-02-12 | 广州电力通信网络有限公司 | Relay support system for reliability of IDC operation and maintenance service |
| CN113157526A (en) * | 2021-04-25 | 2021-07-23 | 珠海市鸿瑞信息技术股份有限公司 | Log auditing system based on power monitoring system |
| CN113467428A (en) * | 2021-07-22 | 2021-10-01 | 浙江幸福航天科技有限公司 | Power station monitoring system |
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