CN112798970B - Remote nuclear capacity system of storage battery of transformer substation - Google Patents
Remote nuclear capacity system of storage battery of transformer substation Download PDFInfo
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- CN112798970B CN112798970B CN202011616374.8A CN202011616374A CN112798970B CN 112798970 B CN112798970 B CN 112798970B CN 202011616374 A CN202011616374 A CN 202011616374A CN 112798970 B CN112798970 B CN 112798970B
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- 238000003860 storage Methods 0.000 title claims abstract description 75
- 238000012545 processing Methods 0.000 claims abstract description 80
- 238000004891 communication Methods 0.000 claims abstract description 33
- 238000012544 monitoring process Methods 0.000 claims abstract description 30
- 230000003993 interaction Effects 0.000 claims abstract description 29
- 230000002159 abnormal effect Effects 0.000 claims abstract description 14
- 238000012360 testing method Methods 0.000 claims abstract description 11
- 238000012806 monitoring device Methods 0.000 claims abstract description 5
- 238000007599 discharging Methods 0.000 claims description 37
- 230000007246 mechanism Effects 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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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
- H02J13/00001—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 characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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Abstract
The invention relates to a remote nuclear capacity system of a substation storage battery, which comprises a remote monitoring device and a station device which are in communication connection, wherein the station device comprises a communication and man-machine interaction device, a data processing and control device, a data acquisition device and an execution device which are in signal connection; the remote monitoring equipment, the communication equipment and the man-machine interaction equipment are provided with medium encryption functions; the communication and man-machine interaction equipment is used for carrying out data interaction with the remote monitoring equipment and providing man-machine interaction; the data processing and controlling device is used for data processing and sending out control signals, and when the logic relation of the control signals is abnormal, the data processing and controlling device uploads an interlocking prompt; the data acquisition equipment is used for acquiring the data signals of the execution equipment and uploading the data signals to the data processing and control equipment; the execution device is used for receiving the control signal and executing the kernel-capacity test, and when the logic relation of the control signal is abnormal, the execution device refuses to operate. The invention has higher safety and can smoothly and safely implement the remote core capacity.
Description
Technical Field
The invention relates to the technical field of automatic control, in particular to the technical field of storage battery maintenance, and particularly relates to a remote capacity checking system for a storage battery of a transformer substation.
Background
Nuclear capacity discharge is the most effective means for detecting the power supply capacity of the storage battery so far, and the remote nuclear capacity detection technology of the storage battery of the transformer substation is developed for solving the problems of heavy task, large workload, high labor intensity and incapability of guaranteeing the working quality of the on-site nuclear capacity operation.
The current remote automatic charging and discharging technology mainly comprises an off-line type, an on-line type and an integrated type, wherein the off-line type thoroughly separates a storage battery from a direct current bus for discharging through electric control switches, and the scheme can realize the real 100% full nuclear capacity. In 220kV transformer substations and important 110kV transformer substations, a station direct current system generally adopts a configuration of two storages and two chargers (two sets of storage batteries are matched with two sets of chargers). Under the configuration, the implementation of the offline automatic charging and discharging technology is easier to realize, and the modification cost is lower. The main technical difficulty of the scheme is that in the nuclear capacity discharge test process, the reliability of the operation of the electric control switch is ensured under the unattended condition, and accidents such as short circuit, voltage loss and the like of a direct current system are avoided.
The current remote capacity checking technology of the storage battery generally aims to solve the problem of heavy work during manual capacity checking, and further, when no person is on duty, the safety problem is faced, the single-channel protection type design is mostly adopted, the criterion is simple, namely whether the system state is normal after operation, whether the current state is normal or not and whether the next operation can be executed is judged by judging whether the system voltage and current are out of limit or not and whether the switch state is consistent with the expected state or not, and a strategy of stopping discharging is adopted when faults occur. The scheme has low reliability, the processing mode is too simple, and the system safety cannot be ensured in fact.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a remote nuclear capacity system of a storage battery of a transformer substation, which has higher safety and can smoothly and safely implement the remote nuclear capacity.
The technical scheme for solving the technical problems is as follows:
The remote nuclear capacity system of the storage battery of the transformer substation comprises a remote monitoring device and a station device which are in communication connection, wherein the station device comprises a communication and man-machine interaction device, a data processing and control device, a data acquisition device and an execution device which are in signal connection; the remote monitoring equipment, the communication and man-machine interaction equipment are respectively provided with a medium encryption function;
The communication and man-machine interaction equipment is in signal connection with the remote monitoring equipment and is used for carrying out data interaction with the remote monitoring equipment and providing man-machine interaction;
The data processing and controlling device is in signal connection with the communication and man-machine interaction device and is used for data processing and sending out control signals, and when the logic relation of the control signals is abnormal, the data processing and controlling device uploads an interlocking prompt;
the data acquisition equipment is respectively in signal connection with the data processing and control equipment and the execution equipment, and is used for acquiring the data signals of the execution equipment and uploading the data signals to the data processing and control equipment;
the execution device is in signal connection with the data processing and control device and is used for receiving a control signal and executing a kernel-volume test, and when the logic relation of the control signal is abnormal, the execution device refuses to operate.
On the basis of the technical scheme, the invention can be improved as follows.
Further, the execution device comprises a plurality of electric control switches, and the data processing and control device sends out control signals to control the switching of the plurality of electric control switches, so that the two groups of direct current buses are connected, the tested storage battery is separated from the direct current buses, the discharging load is started and stopped to finish discharging, the charger is connected with the storage battery to finish charging, the storage battery is connected with the direct current buses, and the two groups of direct current buses are disconnected in sequence.
Further, the electric control switch comprises an electric control switch ZK1, an electric control switch ZK11, an electric control switch ZK12, an electric control switch ZK13, an electric control switch ZK14, an electric control switch ZK21, an electric control switch ZK22, an electric control switch ZK23 and an electric control switch ZK24, two groups of direct current buses are connected through the electric control switch ZK1, two groups of direct current buses are respectively connected with a first charging machine and a second charging machine through the electric control switch ZK11 and the electric control switch ZK21, two groups of direct current buses are respectively connected with a first storage battery and a second storage battery through the electric control switch ZK12 and the electric control switch ZK22, the first charging machine is connected with the first storage battery through the electric control switch ZK13, the second charging machine is connected with the second storage battery through the electric control switch ZK23, and the first storage battery and the second storage battery are respectively connected with the electric control switch ZK24 through the electric control switch ZK 14.
Further, the electric control switch further comprises an electric control switch ZK2 and an electric control switch JK1, wherein the electric control switch ZK2 is arranged at the current input end of the discharging load, and the current output end of the discharging load is connected with a power grid through the electric control switch JK 1.
Further, the logic relationship between the switching-on control output A of the electronic control switch ZK11, the state B of the electronic control switch ZK13 and the input C at the switching-on control end of the electronic control switch ZK11 by the data processing and control equipment is thatThe logic relation between the switching-on control output A of the data processing and control equipment to the electric control switch ZK13, the state B of the electric control switch ZK11 and the input C of the electric control switch ZK13 at the final switching-on control end is/>
Further, the logic relationship between the switching-on control output A of the electronic control switch ZK21, the state B of the electronic control switch ZK23 and the input C at the switching-on control end of the electronic control switch ZK21 by the data processing and control equipment is thatThe logic relation between the switching-on control output A of the electric control switch ZK23, the state B of the electric control switch ZK21 and the input C of the electric control switch ZK23 at the final switching-on control end by the data processing and control equipment is/>
Further, the logic relationship between the data processing and control device and the opening control output A of the electric control switch ZK12, the state B of the electric control switch ZK22 and the input C at the opening control end of the electric control switch ZK12 is C=A.B; the logic relationship between the data processing and control device and the opening control output A of the electric control switch ZK22, the state B of the electric control switch ZK12 and the input C at the opening control end of the electric control switch ZK22 is C=A.B.
Further, the logic relationship between the data processing and control device and the opening control output A of the electric control switch ZK11, the state B of the electric control switch ZK21 and the input C at the opening control end of the electric control switch ZK11 is C=A.B; the logic relationship between the data processing and control device and the opening control output A of the electric control switch ZK21, the state B of the electric control switch ZK11 and the input C of the opening control end of the electric control switch ZK21 is C=A.B.
Further, the data processing and controlling device has a logic relationship of C=A.B to the opening control output A of the electric control switch ZK11, the state of the electric control switch ZK1 is B, and finally the input C at the opening control end of the electric control switch ZK 11; the data processing and control equipment has a logic relation of C=A.B to the opening control output A of the electric control switch ZK12, the state of the electric control switch ZK1 is B and finally the input C at the opening control end of the electric control switch ZK 12; the data processing and control equipment has a logic relation of C=A.B to the opening control output A of the electric control switch ZK21, the state of the electric control switch ZK1 is B and finally the input C at the opening control end of the electric control switch ZK 21; the logic relationship between the data processing and control device and the opening control output A of the electric control switch ZK22, the state of the electric control switch ZK1 is B and finally the input C at the opening control end of the electric control switch ZK22 is C=A.B.
Further, the logic relationship between the data processing and control device and the opening control output A of the electric control switch ZK14, the state B of the electric control switch ZK24 and the input C at the opening control end of the electric control switch ZK14 is thatThe logic relationship between the data processing and control equipment and the opening control output A of the electric control switch ZK24, the state B of the electric control switch ZK14 and the input C at the opening control end of the electric control switch ZK24 is/>
The beneficial effects of the invention are as follows: 1. the system is safe: the network of the remote nuclear capacity device is encrypted by a security medium, all operators are identified and recorded, meanwhile, the manual intervention of inbound maintenance is supported, and the security of equipment is ensured;
2. Interlocking mechanism: interlocking hardware and software, and giving multi-layer protection to the system; and especially, the hardware is interlocked, so that the system fault when the software fails is effectively avoided. When complex faults are encountered, manual intervention is needed to support remote operation, and at the moment, the interlocking of hardware and software can protect the system faults of the equipment caused by misoperation;
3. Exit mechanism: when the remote nuclear capacity device performs nuclear capacity discharge, no matter the discharge is ended and the discharge is abnormal, the remote nuclear capacity device automatically exits and is charged and restored, and the safety of the direct current system is ensured. The system is powered down, the connection with the discharging device is automatically disconnected, the site is maintained, and the fault is prevented from expanding to the greatest extent.
Drawings
FIG. 1 is a schematic diagram of the structure of a remote nuclear capacity system of a storage battery;
FIG. 2 is a block diagram of the DC system of the present invention;
FIG. 3 is a schematic diagram of the system components according to an embodiment of the present invention.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
The remote nuclear capacity system of the storage battery of the transformer substation shown in fig. 1 comprises a remote monitoring device and a station device which are in communication connection, wherein the station device comprises a communication and man-machine interaction device, a data processing and control device, a data acquisition device and an execution device which are in signal connection with each other; the remote monitoring equipment, the communication and man-machine interaction equipment are respectively provided with a medium encryption function;
The communication and man-machine interaction equipment is in signal connection with the remote monitoring equipment and is used for carrying out data interaction with the remote monitoring equipment and providing man-machine interaction;
The data processing and controlling device is in signal connection with the communication and man-machine interaction device and is used for data processing and sending out control signals, and when the logic relation of the control signals is abnormal, the data processing and controlling device uploads an interlocking prompt;
the data acquisition equipment is respectively in signal connection with the data processing and control equipment and the execution equipment, and is used for acquiring the data signals of the execution equipment and uploading the data signals to the data processing and control equipment;
the execution device is in signal connection with the data processing and control device and is used for receiving a control signal and executing a kernel-volume test, and when the logic relation of the control signal is abnormal, the execution device refuses to operate.
As shown in fig. 1, the remote core-container system is divided into a remote device and a station device, wherein the remote device comprises a remote monitoring platform, and is generally arranged in an area, and the remote core-container system has the main functions of monitoring all direct current systems in the area through an ethernet, checking the working condition of the station device, and initiating and terminating remote core-container commands.
The station equipment comprises communication equipment, man-machine interaction equipment, data processing and control equipment, data acquisition equipment and execution equipment. The communication and man-machine interaction equipment receives and displays the data of the data processing and control equipment, receives the command of the remote equipment and sends the command to the data processing and control equipment. The data processing and control equipment receives the system real-time data uploaded by the data acquisition equipment, alarms and uploads the system real-time data after processing, performs a kernel-volume test when receiving the kernel-volume command of the communication and man-machine interaction equipment, and controls the execution equipment to complete the kernel-volume test according to the current state. The data acquisition equipment is responsible for acquiring and uploading the real-time information of the system. The execution equipment is generally referred to as electric control switches, and each electric control switch receives a control signal and then performs on-off conversion, so as to control the discharge of the storage battery to the discharge load and perform a nuclear capacity test.
In this embodiment, the executing device includes a plurality of electronic control switches, and the data processing and controlling device sends a control signal to control the switching of the plurality of electronic control switches, so as to sequentially realize the connection of two groups of direct current buses, the disconnection of the tested storage battery from the direct current buses, the start and stop of the discharging load to finish discharging, the connection of the charger to the storage battery to finish charging, the connection of the storage battery to the direct current buses, and the disconnection of the two groups of direct current buses.
The remote equipment has a security authentication medium encryption function, can operate the station equipment only after passing the security authentication medium authentication, and only allows to check the data of the station equipment when no security authentication medium exists or the security authentication medium is not passed; the communication and man-machine interaction equipment has a security authentication medium encryption function, can operate the communication and man-machine interaction equipment only after passing the authentication of the security authentication medium, and only allows the data of the station equipment to be checked when the security authentication medium is not available or the security authentication medium is not passed; all operations require personnel checks and records in a database.
As shown in fig. 3, the remote monitoring device in this embodiment is a monitoring platform host, which is installed in a management center; station-end monitoring host and other station-end equipment are installed in the transformer substation. And the monitoring platform host computer is networked with a plurality of station monitoring hosts through the Ethernet to form a storage battery monitoring platform. The communication and man-machine interaction equipment is integrated to the station monitoring host, the data processing and control equipment corresponds to the centralized processor of the embodiment, the data acquisition equipment comprises a comprehensive acquisition device and a storage battery acquisition device, the discharge load of the embodiment is a discharge inverter, and the output end of the discharge inverter is connected to a power grid.
The station monitoring host comprises an LCD (liquid crystal display) and an ARM host, and the ARM host is communicated with the centralized processor through RS 232. The centralized processor uses STM32F103VET6 with Cortex-M3 kernel as main control chip, with one path of RS232 and station monitoring host computer communication, one path of RS485 and comprehensive collector and accumulator collector communication, one path of RS485 and discharge inverter communication, with multiple output contact and input contact, monitoring each electric control switch.
The comprehensive collector collects the load current of the charger of the two sections of direct current buses, the bus voltage and the input alternating voltage of the charger and uploads the load current, the bus voltage and the input alternating voltage of the charger through RS 485. The storage battery collector collects the voltage and the current of the storage battery pack end, and the voltage, the temperature and the internal resistance of each battery and uploads the voltage, the temperature and the internal resistance of each battery through RS 485.
In this embodiment, as shown in fig. 2, two sections of direct current buses, a charger and a storage battery are original equipment of a transformer substation. The electric control switch comprises an electric control switch ZK1, an electric control switch ZK11, an electric control switch ZK12, an electric control switch ZK13, an electric control switch ZK14, an electric control switch ZK21, an electric control switch ZK22, an electric control switch ZK23 and an electric control switch ZK24, two groups of direct current buses are connected through the electric control switch ZK1, two groups of direct current buses are respectively connected with a first charging machine and a second charging machine through the electric control switch ZK11 and the electric control switch ZK21, two groups of direct current buses are respectively connected with a first storage battery and a second storage battery through the electric control switch ZK12 and the electric control switch ZK22, the first charging machine is connected with the first storage battery through the electric control switch ZK13, the second charging machine is connected with the second storage battery through the electric control switch ZK23, and the first storage battery and the second storage battery are respectively connected with a discharging load through the electric control switch ZK14 and the electric control switch ZK 24. The electric control switch further comprises an electric control switch ZK2 and an electric control switch JK1, wherein the electric control switch ZK2 is arranged at the current input end of the discharging load, and the current output end of the discharging load is connected with a power grid through the electric control switch JK 1. The electric control switches ZK11, ZK12, ZK13, ZK14, ZK1, ZK21, ZK22, ZK23 and ZK24 are air switches with electric operating mechanisms and are provided with a plurality of auxiliary contacts, the switching-on and switching-off are respectively controlled, and the switching state is maintained when the power is lost. When a short-circuit signal of short time is input at two ends of the control input of the electric operating mechanism in the electric control switch, the electric operating mechanism executes corresponding closing and opening operation so as to realize closing and opening of the corresponding electric control switch. The electric control switch ZK2 is a direct current contactor, the electric control switch JK1 is an alternating current contactor, and the switch is automatically disconnected when power is off. The discharging inverter converts direct current of the storage battery into alternating current through DC/AC in the discharging process and feeds the alternating current back to the power grid.
In order to reduce the volume of equipment, facilitate centralized management and enhance safety, a station monitoring host, a centralized processor, a comprehensive collector and an electric control switch, a discharge inverter is arranged in a direct current screen cabinet. The storage battery collectors are arranged beside the storage battery groups, and each group of storage batteries is provided with one storage battery collector.
The control authority and the modification parameters of the monitoring platform host are required to be authenticated by inserting the dongle, and then face recognition is carried out to open the authority, and all operations of all devices are recorded in a database and can be checked.
The control authority of the station monitoring host, the modification parameters and the like are required to be authenticated by inserting the dongle, and then the authority is opened.
In this embodiment, the switching-on control output contact of the electric control switch ZK13 of the centralized processor is connected in series with the normally closed auxiliary contact of the electric control switch ZK11, and then is connected with the switching-on control input contact of the electric control switch ZK 13. The logic relationship between the switching-on control output A of the data processing and control equipment to the electric control switch ZK11, the state B of the electric control switch ZK13 and the input C of the electric control switch ZK11 at the end is thatThe logic relationship between the switching-on control output A of the data processing and control equipment to the electric control switch ZK13, the state B of the electric control switch ZK11 and the input C of the electric control switch ZK13 at the final switching-on control end is that
In this embodiment, the switching-on control output contact of the electric control switch ZK23 of the centralized processor is connected in series with the normally closed auxiliary contact of the electric control switch ZK21, and then is connected with the switching-on control input contact of the electric control switch ZK 23. The logic relationship between the switching-on control output A of the data processing and control equipment to the electric control switch ZK21, the state B of the electric control switch ZK23 and the input C of the electric control switch ZK21 at the final switching-on control end is thatThe logic relation between the switching-on control output A of the electric control switch ZK23, the state B of the electric control switch ZK21 and the input C of the electric control switch ZK23 at the final switching-on control end by the data processing and control equipment is/>
In this embodiment, the opening output contact of the electric control switch ZK12, the normally open auxiliary contact of the electric control switch ZK22, and the normally open auxiliary contact of the electric control switch ZK1 of the centralized processor are connected in series and then connected with the opening control input contact of the electric control switch ZK 12. The logic relation between the data processing and control equipment and the opening control output A of the electric control switch ZK12, the state B of the electric control switch ZK22 and the input C of the final opening control end of the electric control switch ZK12 is C=A.B; the logic relationship between the data processing and control device and the opening control output A of the electric control switch ZK22, the state B of the electric control switch ZK12 and the input C at the opening control end of the electric control switch ZK22 is C=A.B.
In this embodiment, the opening output contact of the electric control switch ZK11, the normally open auxiliary contact of the electric control switch ZK21, and the normally open auxiliary contact of the electric control switch ZK1 of the centralized processor are connected in series and then connected with the opening control input contact of the electric control switch ZK 11. The switching-on output contact of the electric control switch ZK11 of the centralized processor is connected with the input contact of switching-on control of the electric control switch ZK11 after being connected with the normally closed auxiliary contact of the electric control switch ZK13 in series. The logic relation between the data processing and control equipment and the opening control output A of the electric control switch ZK11, the state B of the electric control switch ZK21 and the input C of the final opening control end of the electric control switch ZK11 is C=A.B; the logic relationship between the data processing and control device and the opening control output A of the electric control switch ZK21, the state B of the electric control switch ZK11 and the input C of the opening control end of the electric control switch ZK21 is C=A.B.
In this embodiment, the output contact of the opening control of the electric control switch ZK1 of the centralized processor is connected with the input contact of the opening control of the electric control switch ZK1 after being connected in series with the normally open auxiliary contact of the electric control switch ZK11, the normally open auxiliary contact of the electric control switch ZK12, the normally open auxiliary contact of the electric control switch ZK21 and the normally open auxiliary contact of the electric control switch ZK 22. The ZK21 opening output contact of the centralized processor, the normally open auxiliary contact of the electric control switch ZK11 and the normally open auxiliary contact of the electric control switch ZK1 are connected in series and then connected with the opening control input contact of the electric control switch ZK 21. The switching-on output contact of the electric control switch ZK21 of the centralized processor is connected with the input contact of switching-on control of the electric control switch ZK21 after being connected with the normally closed auxiliary contact of the electric control switch ZK23 in series. The control switch ZK22 of the centralized processor is connected with the input contact of the switching control of the control switch ZK22 after the switching output contact, the normally open auxiliary contact of the control switch ZK12 and the normally open auxiliary contact of the control switch ZK1 are connected in series.
The data processing and control equipment has a logic relation of C=A.B to the opening control output A of the electric control switch ZK11, the state of the electric control switch ZK1 is B and finally the input C at the opening control end of the electric control switch ZK 11; the data processing and control equipment has a logic relation of C=A.B to the opening control output A of the electric control switch ZK12, the state of the electric control switch ZK1 is B and finally the input C at the opening control end of the electric control switch ZK 12; the data processing and control equipment has a logic relation of C=A.B to the opening control output A of the electric control switch ZK21, the state of the electric control switch ZK1 is B and finally the input C at the opening control end of the electric control switch ZK 21; the logic relationship between the data processing and control device and the opening control output A of the electric control switch ZK22, the state of the electric control switch ZK1 is B and finally the input C at the opening control end of the electric control switch ZK22 is C=A.B.
In the embodiment, a ZK14 closing control output contact of the centralized processor is connected with a normally closed auxiliary contact of the ZK24 in series and then connected with an input contact of closing control of the electric control switch ZK 14; the switching-on control output contact of the electric control switch ZK24 of the centralized processor is connected with the normally closed auxiliary contact of the electric control switch ZK14 in series and then is connected with the switching-on control input contact of the electric control switch ZK 24. The logic relationship between the data processing and control equipment and the opening control output A of the electric control switch ZK14, the state B of the electric control switch ZK24 and the input C at the opening control end of the electric control switch ZK14 is thatThe logic relationship between the data processing and control equipment and the opening control output A of the electric control switch ZK24, the state B of the electric control switch ZK14 and the input C at the opening control end of the electric control switch ZK24 is/>
In the embodiment, when performing nuclear discharge, the remote nuclear device takes a group of batteries on the bus 1 in fig. 2 as an example, and the specific flow is as follows: and the electric control switch ZK1 (namely a bus-bar switch) is switched on, so that the two sections of direct current buses are operated in parallel. Then, the electric control switch ZK11 is switched off, the direct current bus is disconnected from the charger, the electric control switch ZK12 is switched off, the direct current bus is disconnected from the storage battery, the electric control switch ZK14 is switched on, the electric control switch JK1 is switched on, the electric control switch ZK2 is switched on, the discharging load is connected to the storage battery, and the discharging load is started (the discharging inverter is switched on). When a certain state of the storage battery reaches a set value, including battery pack voltage, single battery voltage, discharge capacity, discharge time and the like, stopping the discharge load (closing the discharge inverter), opening the electric control switch ZK14, the electric control switch JK1 and the electric control switch ZK2, disconnecting the storage battery and the discharge load, and ending the discharge. After the discharging is finished, the storage battery is in a power shortage state, and the storage battery should be charged and restored to a normal working state. And switching on the electric control switch ZK13, connecting the first charger to the storage battery, and automatically completing charging by the first charger according to the sequence of uniform charging and floating charging. And after the charging is judged to be finished according to the charging voltage and the charging current, the electric control switch ZK13 is switched off, the electric control switch ZK12 is switched on, the electric control switch ZK11 is switched on, the electric control switch ZK1 is switched off, the storage battery and the first charger are connected to the buses, the two buses are disconnected, the whole system is restored to a normal working state, and the whole nuclear capacity test is finished.
When the remote nuclear capacity device of the embodiment performs nuclear capacity discharge, if an alternating current power failure abnormality occurs in the discharge process, the electric control switch JK1 is automatically switched off, the discharge load stops discharging, and the current capacity of the storage battery is ensured. If abnormal communication occurs between the station monitoring host and the monitoring platform host, the station monitoring host issues a discharge stopping instruction, and the centralized processor stops discharging according to the flow and then transfers to charging, and restores the system. The station end monitoring host computer and the centralized processor are abnormal in communication, the centralized processor automatically stops discharging according to the flow and then transfers to charging, for example, maintenance personnel arrives at the station for maintenance, and all the electric control switches can be switched to a manual mode for maintenance. After the communication is recovered to be normal, after the communication is verified by a safety medium of the monitoring platform host, a manual remote control electric control switch is selected, and the recovery of the site is completed.
The logic limitations of the present embodiment are through hardware and software double interlocking, which is concurrent with the discharge flow; when the condition of interlocking work is caused, the switch control is invalid, and the data processing and control equipment uploads an interlocking prompt and refuses to operate; the logic limitation only works when the controller is electrically controlled, and the switch is directly manually operated at the station end, and the logic is not limited.
When the data processing and control equipment is powered off or forced to restart, the electric control switch ZK2 and the electric control switch JK1 are automatically disconnected, so that the discharging load can automatically stop working; particularly, the discharging load is an electronic load, the control circuit of the discharging load supplies power for alternating current, and the discharging load stops working when the alternating current is powered off; therefore, the three-stage protection mechanism can ensure that the storage battery can timely return to standby power to work when the alternating current fails in the discharging process, and can also ensure that the storage battery is overdischarged caused by errors of a system after the storage battery is recovered from the fault.
The remote nuclear capacity device of the embodiment simulates a mode of manually carrying out nuclear capacity test to carry out remote nuclear capacity test, and automatically shifts to charge after discharging is completed, and then enters into operation after charging is completed.
If the remote nuclear capacity device is abnormal in the discharging process, the next operation is carried out according to a corresponding processing method, and the alarm is given, and if the faults such as abnormal communication of the far end and the near end, alternating current power failure and the like occur, the remote nuclear capacity device completes automatic control until the storage battery is finally put into a bus to normally work and run. If the abnormality such as the failure of the switch control occurs, the remote nuclear capacity device keeps the current situation after stopping discharging, and alarms until the operation and maintenance personnel finishes the recovery operation, and the alarm is stopped after the storage battery is normally put into operation.
This embodiment has the following advantages:
1. the system is safe: the network of the remote nuclear capacity device is encrypted by a security medium, all operators are identified and recorded, meanwhile, the manual intervention of inbound maintenance is supported, and the safety of equipment is ensured.
2. Interlocking mechanism: interlocking hardware and software, and giving multi-layer protection to the system; and especially, the hardware is interlocked, so that the system fault when the software fails is effectively avoided. When complex faults are encountered, manual intervention is needed to support remote operation, and at the moment, the interlocking of hardware and software can protect the system faults of the equipment caused by misoperation.
3. Exit mechanism: when the remote nuclear capacity device performs nuclear capacity discharge, no matter the discharge is ended and the discharge is abnormal, the remote nuclear capacity device automatically exits and is charged and restored, and the safety of the direct current system is ensured. The system is powered down, the connection with the discharging device is automatically disconnected, the site is maintained, and the fault is prevented from expanding to the greatest extent.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (8)
1. The remote nuclear capacity system of the storage battery of the transformer substation is characterized by comprising a remote monitoring device and a station device which are in communication connection, wherein the station device comprises a communication and man-machine interaction device, a data processing and control device, a data acquisition device and an execution device which are in signal connection; the remote monitoring equipment, the communication and man-machine interaction equipment are respectively provided with a medium encryption function;
The communication and man-machine interaction equipment is in signal connection with the remote monitoring equipment and is used for carrying out data interaction with the remote monitoring equipment and providing man-machine interaction;
The data processing and controlling device is in signal connection with the communication and man-machine interaction device and is used for data processing and sending out control signals, and when the logic relation of the control signals is abnormal, the data processing and controlling device uploads an interlocking prompt;
the data acquisition equipment is respectively in signal connection with the data processing and control equipment and the execution equipment, and is used for acquiring the data signals of the execution equipment and uploading the data signals to the data processing and control equipment;
The execution device is in signal connection with the data processing and control device and is used for receiving a control signal and executing a kernel-volume test, and when the logic relation of the control signal is abnormal, the execution device refuses to operate;
The execution equipment comprises a plurality of electric control switches, the data processing and control equipment sends out control signals to control the switching of the plurality of electric control switches, so that two groups of direct current buses are connected, a tested storage battery is separated from the direct current buses, a discharging load is started and stopped to finish discharging, a charger is connected with the storage battery to finish charging, the storage battery is connected with the direct current buses, and the two groups of direct current buses are disconnected in sequence;
The electric control switch comprises an electric control switch ZK1, an electric control switch ZK11, an electric control switch ZK12, an electric control switch ZK13, an electric control switch ZK14, an electric control switch ZK21, an electric control switch ZK22, an electric control switch ZK23 and an electric control switch ZK24, two groups of direct current buses are connected through the electric control switch ZK1, two groups of direct current buses are respectively connected with a first charging machine and a second charging machine through the electric control switch ZK11 and the electric control switch ZK21, two groups of direct current buses are respectively connected with a first storage battery and a second storage battery through the electric control switch ZK12 and the electric control switch ZK22, the first charging machine is connected with the first storage battery through the electric control switch ZK13, the second charging machine is connected with the second storage battery through the electric control switch ZK23, and the first storage battery and the second storage battery are respectively connected with a discharging load through the electric control switch ZK14 and the electric control switch ZK 24.
2. The remote nuclear capacity system of a storage battery of a transformer substation according to claim 1, wherein the electric control switch further comprises an electric control switch ZK2 and an electric control switch JK1, the electric control switch ZK2 is arranged at a current input end of the discharging load, and a current output end of the discharging load is connected with a power grid through the electric control switch JK 1.
3. The remote nuclear capacity system of a storage battery of a transformer substation according to claim 1, wherein the logic relationship between the switching-on control output a of the data processing and control device to the electronically controlled switch ZK11, the state B of the electronically controlled switch ZK13 and the input C at the switching-on control end of the electronically controlled switch ZK11 is that; The logic relation between the switching-on control output A of the data processing and control equipment to the electric control switch ZK13, the state B of the electric control switch ZK11 and the input C of the electric control switch ZK13 at the final switching-on control end is/>。
4. The remote nuclear capacity system of a storage battery of a transformer substation according to claim 1, wherein the logic relationship between the switching-on control output a of the data processing and control device to the electronically controlled switch ZK21, the state B of the electronically controlled switch ZK23 and the input C at the switching-on control end of the electronically controlled switch ZK21 is that; The logic relation between the switching-on control output A of the electric control switch ZK23, the state B of the electric control switch ZK21 and the input C of the electric control switch ZK23 at the final switching-on control end by the data processing and control equipment is/>。
5. The remote nuclear capacity system of a storage battery of a transformer substation according to claim 1, wherein the logic relationship between the data processing and control device and the opening control output a of the electric control switch ZK12, the state B of the electric control switch ZK22 and the input C at the opening control end of the electric control switch ZK12 is c=a·b; the logic relationship between the data processing and control device and the opening control output A of the electric control switch ZK22, the state B of the electric control switch ZK12 and the input C at the opening control end of the electric control switch ZK22 is C=A.B.
6. The remote nuclear capacity system of a storage battery of a transformer substation according to claim 1, wherein the logic relationship between the data processing and control device and the opening control output a of the electric control switch ZK11, the state B of the electric control switch ZK21 and the input C at the opening control end of the electric control switch ZK11 is c=a·b; the logic relationship between the data processing and control device and the opening control output A of the electric control switch ZK21, the state B of the electric control switch ZK11 and the input C of the opening control end of the electric control switch ZK21 is C=A.B.
7. The remote nuclear capacity system of a storage battery of a transformer substation according to claim 1, wherein the logic relationship among the data processing and control device on the opening control output a of the electric control switch ZK11, the state of the electric control switch ZK1 being B, and finally the input C at the opening control end of the electric control switch ZK11 is c=a·b; the data processing and control equipment has a logic relation of C=A.B to the opening control output A of the electric control switch ZK12, the state of the electric control switch ZK1 is B and finally the input C at the opening control end of the electric control switch ZK 12; the data processing and control equipment has a logic relation of C=A.B to the opening control output A of the electric control switch ZK21, the state of the electric control switch ZK1 is B and finally the input C at the opening control end of the electric control switch ZK 21; the logic relationship between the data processing and control device and the opening control output A of the electric control switch ZK22, the state of the electric control switch ZK1 is B and finally the input C at the opening control end of the electric control switch ZK22 is C=A.B.
8. The remote nuclear capacity system of a storage battery of a transformer substation according to claim 1, wherein the logic relationship between the data processing and control device and the opening control output a of the electric control switch ZK14, the state B of the electric control switch ZK24 and the input C at the opening control end of the electric control switch ZK14 is that; The logic relationship between the data processing and control equipment and the opening control output A of the electric control switch ZK24, the state B of the electric control switch ZK14 and the input C at the opening control end of the electric control switch ZK24 is/>。
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