CN215990322U

CN215990322U - Back-up power supply system of new energy box transformer substation

Info

Publication number: CN215990322U
Application number: CN202122051334.XU
Authority: CN
Inventors: 任涛; 朱怀英; 师重庆; 王鹏; 杨兆辉; 吴日卓; 刘冰; 吴基铭
Original assignee: Sdic Guangxi Wind Power Co ltd
Current assignee: Sdic Guangxi Wind Power Co ltd
Priority date: 2021-08-27
Filing date: 2021-08-27
Publication date: 2022-03-08
Anticipated expiration: 2031-08-27

Abstract

The application discloses new forms of energy case becomes back-up electrical power generating system, include the on-the-spot signal acquisition device who is connected with the signal acquisition object in the system, on-the-spot signal acquisition device still is connected with signal transmission device, signal transmission device still with management terminal be connected with on-the-spot signal transmission extremely management terminal, management terminal is used for handling the analysis on-the-spot signal shows the real-time status of signal acquisition object. Utilize above-mentioned new forms of energy case to become back-up power supply system, can realize the remote monitoring of case becomes back-up power supply, master case becomes back-up power supply information in real time, the problem can in time be discover, for preparing to maintain the spare parts and provide accurate data, can high-efficient fortune dimension, guarantee equipment safe operation, also can reduce fortune dimension cost.

Description

Back-up power supply system of new energy box transformer substation

Technical Field

The utility model belongs to the technical field of power equipment, and particularly relates to a new energy box transformer substation backup power supply system.

Background

The box-type transformer of the existing wind power plant adopts an oil-immersed three-phase double-winding self-cooled step-up transformer, a box transformer backup power supply adopts a unit wiring mode of changing one to one for backup, namely, one box transformer is a set of backup system, the backup power supply is configured for a protection measurement and control device to realize the remote control of the box transformer, and the reliability of the box transformer backup power supply directly influences the safe and stable operation and the economic benefit of the wind power plant.

However, in the prior art, the box transformer substations are relatively dispersed and are relatively far away, so that the operation condition of the backup power supply of the box transformer substation cannot be remotely and centrally monitored, and when equipment fails, the background monitoring of the box transformer substation cannot remotely alarm, so that the equipment has relatively great risk and hidden danger in operation.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides a new energy box transformer substation backup power supply system which can realize remote monitoring of a box transformer substation backup power supply, master information of the box transformer substation backup power supply in real time, find problems in time, provide accurate data for standby maintenance spare parts, realize high-efficiency operation and maintenance, ensure safe operation of equipment and reduce operation and maintenance cost.

The utility model provides a new energy box transformer substation backup power supply system which comprises a field signal acquisition device connected with a signal acquisition object in the system, wherein the field signal acquisition device is also connected with a signal transmission device, the signal transmission device is also connected with a management terminal so as to transmit a field signal to the management terminal, and the management terminal is used for processing and analyzing the field signal and displaying the real-time state of the signal acquisition object.

Preferably, in the above system, the system further includes a mobile terminal connected to the management terminal, and the mobile terminal is configured to receive and display a real-time state of the signal acquisition object.

Preferably, in the above new energy box substation backup power supply system, the signal transmission device is a wireless signal transmission device.

Preferably, in the above-mentioned new forms of energy case becomes back-up power supply system, on-the-spot signal pickup assembly is intelligent cloud box.

Preferably, in the above backup power system for the new energy box-to-substation, the signal acquisition object is a UPS and/or a generator and/or a water leakage sensor and/or a temperature and humidity sensor and/or a smoke sensor and/or an audible and visual alarm and/or an infrared alarm.

Preferably, in the above-mentioned new forms of energy case becomes back-up power supply system, signal transmission device still is connected with video acquisition device and/or entrance guard.

Preferably, in the above new energy box-type substation backup power supply system, a constant temperature cabinet for providing a constant operating temperature for the UPS and the storage battery in the system is further included.

Preferably, in the above new energy box-to-box backup power supply system, the UPS is a UPS having a charge equalization function.

Preferably, in the above new energy box transformer substation backup power supply system, the storage battery is a sealed lead-acid maintenance-free storage battery.

Preferably, in the above-mentioned new energy box transformer substation backup power supply system, the system is located in a service room.

According to the new energy box transformer substation backup power supply system, the field signal acquisition device connected with the signal acquisition object in the system is included, the field signal acquisition device is further connected with the signal transmission device, the signal transmission device is further connected with the management terminal to transmit the field signal to the management terminal, and the management terminal is used for processing and analyzing the field signal and displaying the real-time state of the signal acquisition object, so that the remote monitoring of the box transformer substation backup power supply can be realized, the information of the box transformer substation backup power supply can be mastered in real time, problems can be found in time, accurate data can be provided for spare parts to be maintained, the efficient operation and maintenance can be realized, the safe operation of equipment can be guaranteed, and the operation and maintenance cost can be reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic diagram of an embodiment of a backup power system for a new energy box transformer substation provided by the present invention;

fig. 2 is a schematic diagram of an embodiment of a backup power system of a new energy box transformer substation.

Detailed Description

The core of the utility model is to provide a new energy box transformer substation backup power supply system, which can realize remote monitoring of a box transformer substation backup power supply, master information of the box transformer substation backup power supply in real time, find problems in time, provide accurate data for preparing maintenance spare parts, realize high-efficiency operation and maintenance, ensure safe operation of equipment and reduce operation and maintenance cost.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 shows an embodiment of a new energy box transformer substation backup power supply system provided by the utility model, and fig. 1 is a schematic diagram of an embodiment of the new energy box transformer substation backup power supply system provided by the utility model, the system includes a field signal acquisition device 102 connected with a signal acquisition object 101 in the system, the field signal acquisition device 102 is further connected with a signal transmission device 103, the signal transmission device 103 is further connected with a management terminal 104 to transmit a field signal to the management terminal 104, and the management terminal 104 is used for processing and analyzing the field signal and displaying a real-time state of the signal acquisition object.

It should be noted that the signal acquisition object may be any device capable of acquiring signals in the system, and various information in the system can be displayed in a centralized manner by using the internet of things manner of the embodiment, the device which has faults in the system can be found in time in the management terminal, thereby facilitating the timely treatment, and the connection mode between the field signal acquisition device and the signal transmission device is not limited, and the specific form of the signal transmission device is not limited, preferably a wireless transmission device, this avoids cumbersome wiring arrangements, the management terminal described herein may be but is not limited to a computer, on which the field signal can be analyzed and processed and displayed to the monitor, when any device in the system is failed, the field signal can be processed in time, and it is no longer possible to know which device has failed only to the field as in the prior art.

The management terminal can be composed of a monitoring server and a system platform, can work off-line, has independent data processing and data storage capacity, is used for storing, processing, analyzing and outputting various transmitted information in real time, processing all alarm information, recording alarm events and being responsible for sending control commands to front-end equipment, realizes remote control on field equipment, is convenient for managers to know the working condition of a machine room anytime and anywhere, can directly view monitoring pictures consistent with the monitoring server, and can also realize remote control on the equipment under the condition of having corresponding authority, such as the on-off of an air conditioner and the like.

According to the embodiment of the new energy box transformer substation backup power supply system provided by the utility model, the system comprises the field signal acquisition device connected with the signal acquisition object in the system, the field signal acquisition device is also connected with the signal transmission device, the signal transmission device is also connected with the management terminal to transmit the field signal to the management terminal, and the management terminal is used for processing and analyzing the field signal and displaying the real-time state of the signal acquisition object, so that the remote monitoring of the box transformer substation backup power supply can be realized, the information of the box transformer substation backup power supply can be mastered in real time, problems can be found in time, accurate data can be provided for preparing a spare part for maintenance, the operation and maintenance can be carried out efficiently, the safe operation of equipment can be ensured, and the operation and maintenance cost can be reduced.

In an embodiment of the above new energy box transformer backup power supply system, referring to fig. 2, fig. 2 is a schematic diagram of an embodiment of the new energy box transformer backup power supply system, and the system may further include a mobile terminal 205 connected to the management terminal 204, and configured to receive and display a real-time status of a signal collection object, and the signal transmission device may preferably be a wireless signal transmission device. It should be noted here that fig. 2 illustrates that the mobile terminal 205 is connected to the signal transmission device 203, and in fact, the three may be connected in a wireless manner, and may communicate with each other in a wireless manner, so that the mobile terminal 205 may be used to perform more efficient operation, maintenance and management on the outdoor cabinet UPS and the internal storage battery of the box transformer substation, and implement remote monitoring on the basis of performing on-site monitoring, and implement centralized monitoring under different environments synchronously at the APP end of the mobile phone and the WEB end of the computer end.

Specifically, the management terminal and the mobile terminal may implement the following functions:

(1) real-time data display

The signal transmission device sends instructions for acquiring various data to each signal acquisition object in the central machine room or each remote monitoring station in real time, the instructions and transmission modes of different objects are different, and the acquired data are analyzed, calculated and effectively stored. And the management terminal analyzes and stores the returned data, and simultaneously records the state of the equipment and pushes the real-time message. And the WEB accesses the management terminal, reads data in a database on a human-computer interface, and displays the operation parameters, the operation state and the alarm parameters of each signal acquisition object in real time through various forms such as characters, graphs, tables, animations and the like through the human-computer interface.

(2) Real-time alarm function

The monitoring platform has a perfect event and alarm mechanism, can send out various alarm signals and generate event change notifications after the running state or the numerical value of the equipment is changed or the communication is abnormal, and the notifications are immediately displayed in a human-computer interface and can be inquired according to time periods.

(3) Historical data and reporting functions

The management terminal automatically stores all effective monitoring data in the database, an operator can inquire any time and any parameter historical data of any signal acquisition object in a webpage at any time, a historical curve graph is automatically generated, the inquiry result is displayed or printed in a list mode for analysis, and the system stores the historical data without time limit.

(4) Alarm management function

The method can be selected by various modes such as short message alarm, voice alarm, sound-light alarm, WEB popup window and mailbox, and a user can select a proper alarm mode according to the self condition.

(5) Device sharing functionality

The related data and alarm information of the signal acquisition object can be shared with other people according to the requirements of clients, specifically, a user of the two-dimensional code of the scanning device is identified as a super manager, has the authority of the sharing device for other people, and can delete the shared person; the shared users cannot share the device to other people; the shared users cannot exceed 9 individuals.

In another specific embodiment of the above new energy box transformer substation backup power supply system, the field signal acquisition device may preferably be a smart cloud box. The intelligent cloud box is collection and transmission equipment, and the intelligent cloud box that adopts has three kinds of series altogether, and compatible different equipment respectively, 4G version cloud box passes through the flow card and realizes network connection, and the cloud box has the function of not cutting off the power supply, under the circumstances that the cloud box power is lacked, still can continue a journey more than 3 hours. The client is continuously brought with device status information. The connectable equipment of the T1 type cloud box comprises a UPS, a precision air conditioner, a generator, an inverter, a HVDC, an electric meter and the like, can communicate through an RS232/RS485 port and access a network through 4G, and the connectable equipment of the T2 type cloud box comprises RS485 communication equipment which needs to be provided with a power supply, such as temperature, humidity, a battery and the like.

In the new energy box-to-substation backup power supply system, with reference to fig. 2, the signal acquisition object may be a UPS2011 and/or a generator 2012 and/or a water leakage sensor 2013 and/or a temperature and humidity sensor 2014 and/or a smoke sensor 2015 and/or an audible and visual alarm 2016 and/or an infrared alarm 2017, in addition, the signal transmission device may also be connected to a video acquisition device 2018 and/or a door access 2019, and of course, may also be another object, such as the precision air conditioner 206 in fig. 2.

Specifically, the working state and the operation parameters of the UPS can be monitored, the cell voltage, the cell internal resistance, the sampling temperature, the group voltage and the charging and discharging current parameters of the storage battery in the storage battery pack can be monitored, and interface alarm, short message alarm, voice alarm, mail alarm and acousto-optic alarm can be realized by utilizing a platform alarm mode. The UPS is an important part in a power loop of a machine room and plays an important role in pure energy supply and driving endurance during power failure, and the UPS mainly comprises a rectifier, an inverter, a battery and a bypass. The monitoring content for the UPS comprises the following contents:

1) parameter acquisition: the battery management system comprises an input voltage, an output voltage, a bypass voltage, an input frequency, a load amount, a battery voltage, a battery electric quantity, a battery working time and the like;

2) and (3) state acquisition: a normal mode, a shutdown mode, a bypass mode, a battery mode, and an offline mode;

3) and (3) historical statistics: power failure times statistics, overvoltage statistics, battery switching times statistics, bypass switching times statistics and overload times statistics;

4) and (4) fault recording: power down alarms, machine fault alarms, input over-voltage alarms, input low voltage alarms, battery over-voltage alarms and battery low voltage alarms.

The method comprises the steps of monitoring parameters of storage batteries in a machine room in real time, carrying out connection monitoring with each battery by additionally arranging storage battery detectors, enabling a plurality of storage battery detectors to access signals into an intelligent cloud box in a bus mode through RS485 intelligent interfaces and communication protocols, uploading data to a monitoring server through the cloud box, and monitoring the storage batteries through monitoring platform software. 1) Collecting parameters: voltage of a single battery, internal resistance of the battery, temperature of the battery, current of the battery and ambient temperature; 2) alarm setting: overpressure alarm, low pressure alarm, high temperature alarm, low temperature alarm, overpressure alarm release, low pressure alarm release, high temperature alarm release, low temperature alarm release. Specifically, the main functions of the battery monitoring module include: monitoring the voltage of each battery, the pole temperature of each battery, the internal resistance of each battery, the group voltage of a battery pack, the charge-discharge current, the ambient temperature and online thermal runaway monitoring; the battery temperature monitoring device has the functions of battery thermal runaway, monomer internal resistance, monomer voltage, battery temperature, pack voltage, charging and discharging current and automatic alarm when the ambient temperature exceeds the limit, the alarm threshold value can be set, equipment sends out alarm sound when alarm occurs, a red alarm lamp is on, a dry contact is closed, and the specific alarm content can be inquired through the equipment; the internal resistance of the battery is automatically and periodically measured, manual intervention is not needed, the standard internal resistance value of each battery can be automatically obtained for solidification, and the quality of the battery is judged by comparing the automatic internal resistance value in the transverse direction with the internal resistance value in the longitudinal direction; the system is provided with an LCD display screen and a set key, can inquire and display all monitoring data and part of historical data, can modify the operation parameters of the equipment, and has password protection when entering a modification menu; when the storage battery pack is discharged, the discharge curve and the discharged capacity can be automatically recorded and can be inquired on an LCD display screen; recording various events in the running process of the equipment, including equipment restart, alarm generation, automatic internal resistance test and the like, and inquiring on an LCD display screen; storing a certain amount of data, wherein the number of alarms is 100, the internal resistance is one year, the group voltage current is one month, and the discharge record is once per group; modifying the operation parameters directly on the equipment; the system is provided with an RS485 port, a network port and a USB port, supports MODBUS/RTU, MODBUS/TCP, SNMP and TCP/IP protocols, and is provided with two dry contacts, one of which is an equipment fault contact, and the other of which is a battery alarm contact; the battery monitoring module is provided with a filter circuit, so that ripples of 2 times, 4 times, 6 times and the like generated by the UPS can be blocked, and the normal work of the interference module is prevented; the test stand can bear the following anti-interference tests, and the product can normally work after the test: (ii) electrostatic discharge, harsh class 3, implementing standard GB/T17626.12; secondly, conducting disturbance induced by a radio frequency field, wherein the harsh level is 3, and the standard GB/T17626.6 is executed; thirdly, electrically fast transient pulse group oscillation waves, with a harsh grade of 3, execute the standard GB/T17626.4; fourthly, a power frequency magnetic field, a harsh grade of 3, and an execution standard GB/T17626.8; the TA module can monitor the voltage, the internal resistance and the temperature of a single battery and upload data to the convergence module through a communication port, the TA module does not have an alarm judging function, the TA module is powered by the battery, the maximum power of the 2V module is less than 0.15W, and the maximum power of the 12V module is less than 0.25W; it should be noted that 2V modules can only be used on batteries monitoring 2V, as can 12V, which would otherwise damage the module.

In the prior art, the capacity of a UPS adopted in a new energy box-to-backup power supply system is generally 2kVA/1.6kW, 6 lead-acid storage batteries with 12V and 65Ah are installed, the lead-acid storage batteries are completely input by the bypass commercial power of the UPS, when an inverter works in a bypass mode, an inverter full-bridge circuit of the UPS is used for charging the batteries, the charging mode has no strict battery management, the charging voltage can fluctuate along with the change of the grid voltage, the charging current is uncontrollable, the modulation performance of pulse width control on reverse inversion is poor, the storage battery charging mode adopts a floating charging mode, the service life of the storage battery is greatly influenced by the excessively low floating charging voltage value, the storage battery is in an unfilled state, the rated capacity of the storage battery is permanently fixed below a certain percentage, and the backup time of original equipment design cannot be realized. In order to solve the problem, in the new energy box-to-box backup power supply system provided by this embodiment, the UPS may preferably be a UPS having a charge equalization function, which may improve the operating environment of the UPS and the battery, and prolong the service life. Specifically, under the long-term floating charge operation of the storage battery, the partial storage batteries of one group of batteries may be passivated due to the long-term floating charge, the voltage consistency of the whole group of storage batteries is deteriorated due to the voltage drop of individual batteries, the service life of the whole group of storage batteries is shortened, the storage batteries can be uniformly charged and maintained for half a year by using the UPS with the uniform charging function, the activity of the storage battery is improved, the UPS has complete and independent parts of rectification, inversion, uniform floating charge, static bypass, control, display and the like, and a DSP control technology is adopted.

Further, in the above new energy box-to-box backup power supply system, the storage battery may preferably be a sealed lead-acid maintenance-free storage battery. Preferred parameters of such a battery are as follows: the standard battery voltage is 72V, the battery voltage is 12V, the number is 6, the standard charging power is larger than 720W, the full load is 4min, the UPS standard is provided with an RS232 interface, a TCP/IP, Modbus or SNMP protocol expansion card is supported, the network monitoring function is realized by a network monitoring card and monitoring software, the standard LED indicator lamp LCD liquid crystal monitoring panel is provided with a fan maintenance function, the over-temperature function, the reminding function and the like, the discharging time can reach more than 65 hours, the reliability of the box transformer backup power supply is effectively improved, the safety risk of on-site power-off operation of personnel is avoided, and the power transmission of recovery equipment is shortened.

The technical personnel in the field can know that the environment has obvious influence on the operation of the lead-acid storage battery, the environment of the installation position of some box transformers is severe, the duration time of high-temperature seasons is long, a box transformer backup power supply is installed in a low-voltage distribution room, the indoor temperature is as high as 65 ℃ in a high-load state, the requirements of the lead-acid storage battery on the use environment, particularly the use temperature range, are very strictly limited, the operating temperature of a UPS device is exceeded under the high-temperature environment of 65 ℃, the circuit board of the UPS device is easy to burn and damage, the fault rate is high, the normal rectification and inversion functions cannot be realized, the battery shell is easy to be out of control due to thermal runaway at high temperature, the bulge deformation or permanent capacity failure of the battery shell is caused, and the problems that the direct-current output voltage cannot reach the rated voltage of the UPS, the UPS cannot realize the alternating-current inversion 220V output, and the backup power supply cannot be provided for a measurement and control device exist, aiming at the problem, in the new energy box-type substation backup power supply system provided by the utility model, the installation position of the system is adjusted, the system provided by the embodiment is positioned in an overhaul room, and the system also can comprise a constant temperature cabinet for providing constant operation temperature for a UPS and a storage battery in the system. Concretely, outdoor integration constant temperature rack adopts AC220V to insert from the case to become the low-pressure chamber, and the rack is formed by the cotton equipment of panel beating frame +20mm thick PEF heat preservation, and is rain-proof, dustproof, anticorrosive, and the complete machine contains rack, 600W industrial air conditioner.

To sum up, utilize above-mentioned new forms of energy case to become backup power supply system, can improve the operational environment of case becomes backup power supply, extension storage battery, UPS life-span, change the UPS device and make UPS possess the float and all charge the mode, improve the battery availability, improve the reliability of case becomes backup power supply, realize UPS, storage battery monitoring, the on-the-spot signal that will gather is connected to server and system platform through intelligent cloud box with the 4G mode, realize through cell-phone APP that interface warning, SMS warning, audible-visual alarm, the audible-visual alarm, master case becomes backup power supply information in real time, provide powerful platform for the later stage realizes that the case becomes comprehensive monitoring simultaneously.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a new forms of energy case becomes back-up power supply system which characterized in that, includes the on-the-spot signal acquisition device who is connected with the signal acquisition object in the system, on-the-spot signal acquisition device still is connected with signal transmission device, signal transmission device still with management terminal be connected with on-the-spot signal transmission extremely management terminal, management terminal is used for handling the analysis on-the-spot signal shows the real-time status of signal acquisition object.

2. The system according to claim 1, further comprising a mobile terminal connected to the management terminal for receiving and displaying a real-time status of the signal acquisition object.

3. The system according to claim 1, wherein the signal transmission device is a wireless signal transmission device.

4. The new energy box transformer substation backup power supply system according to claim 1, wherein the field signal acquisition device is a smart cloud box.

5. The new energy box transformer substation backup power supply system according to claim 1, wherein the signal acquisition object is a UPS and/or a generator and/or a water leakage sensor and/or a temperature and humidity sensor and/or a smoke sensor and/or an audible and visual alarm and/or an infrared alarm.

6. The new energy box transformer substation backup power supply system according to claim 1, wherein the signal transmission device is further connected with a video acquisition device and/or an entrance guard.

7. The new energy box transformer backup power system according to any one of claims 1-6, further comprising a thermostatic cabinet for providing constant operating temperature for the UPS and the storage battery in the system.

8. The new energy box transformer substation backup power supply system according to claim 7, wherein the UPS is a UPS with a charge equalization function.

9. The new energy box transformer substation backup power supply system according to claim 7, wherein the battery is a sealed lead-acid maintenance-free battery.

10. The new energy box transformer substation backup power supply system according to claim 7, wherein the system is located in a service room.