CN207067356U - A kind of storage batteries of transformer substation core capacitance device with desulfuration repair function - Google Patents
A kind of storage batteries of transformer substation core capacitance device with desulfuration repair function Download PDFInfo
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Abstract
The utility model devises a kind of storage batteries of transformer substation core capacitance device with desulfuration repair function, it can not only realize that battery holds from kinetonucleus, and the charge and discharge process for holding experiment using core realizes individual desulfuration mobilizing function, single battery is made to be in optimum state, solves the problems, such as vulcanization, it is ensured that battery effectively uses capacity.
Description
Technical field
The technical field of battery is the utility model is related to, more particularly, to a kind of change with desulfuration repair function
Power station battery core capacitance device.
Background technology
Batteries are the important components of transformer station direct current system, when Substation Station is with AC system decompression, entirely
Stand secondary device such as relay protection, failure wave-recording etc. will be powered by batteries, therefore battery is the last of straight-flow system
One of defence line.Transformer station generally uses analysing valve control type lead-acid accumulator battery at present, life-span of each battery cell in batteries, capacity and
Runnability is always that transformer station pays close attention to object, is the restriction short slab in substation accident processing, is deposited in permanent operation
In problems with:
1st, single battery can not ensure that each monomer parameter is consistent when dispatching from the factory, therefore monomer difference determines each electric power storage
Pond monomer exist during series operation discharge and recharge is unbalanced, partial monosomy charge less electricity, partial monosomy long-time overdischarge etc.
It problem, will cause to generate a kind of hard and conductive bad lead sulfate coarse grain on accumulator plate, increase accumulator internal resistance, drop
Low capacity, this phenomenon are exactly that battery forms " vulcanization ".
2nd, Substation Station battery or communication battery be by some single batteries series connection in groups, by based on
The DC charging motor of HF switch directly carries out charge and discharge control to whole group battery, and passes through battery condition on-line computing model
The parameters such as terminal voltage, temperature to every group storage battery are measured and monitored, but lack the repair function to storage battery vulcanization,
Storage battery vulcanization problem cannot be solved effectively always.
3rd, batteries are chronically at floating charge electricity condition as important straight-flow system equipment, all battery cells, only
Carry out core to battery according to administrative provisions and hold experiment, core holds experiment and often lays particular emphasis on test-based examination battery group capacity, discharges
With charging process to battery desulfuration limitation.
4th, storage battery vulcanization phenomenon will reduce the contact area of active material and electrolyte on accumulator plus-minus polar plate, for a long time
Crystal grain will be constantly thickened, accumulator capacity will be greatly reduced, and the case that battery is scrapped in advance by vulcanization problem in present situation is cured
Add and increase.
The content of the invention
Under the existing discharge and recharge method of operation for controlling whole group battery with whole group of power supply enterprise, battery is in floating charging
When will inevitably have this phenomenon(The working time of the battery more than 99% of power supply enterprise is in floating charge state):
Most of monomer is in floating charge state, and some monomer is in overcharging state, and some monomer is in charge less state.And this phenomenon
Also it can inevitably cause the battery capacity of batteries to reduce, reduce service lifetime of accumulator, result even in core and hold examination
Test unqualified(Actual capacity<It is unqualified to be judged as that core holds during 80%* rated capacities, now needs to change battery).
For single battery, this certainly will cause sulfation.
Research of the sphere of learning to vulcanizing problem is less, is primarily due to storage battery vulcanization problem and is difficult to guantification description,
The problem of because of individual difference, the resistance characteristic of battery has differences in itself, and the internal resistance in the chemical reaction process of discharge and recharge
Also the moment changes, and state of cure (vulcanization) is difficult to by measuring accumulator internal resistance precisely to determine.
On the other hand, vulcanization problem is the O&M accumulation problem of a chronicity, relevant with battery past service condition, no
Certainty factor cause to lack at present it is effective, targetedly solve method.
The desulfuration method of battery mainly has following several at this stage:It is hydrotherapy, large current charge method, chemical method respectively
And impulse method.
Hydrotherapy is exactly to dilute electrolyte in battery, to improve the solubility of sulfuric acid leading crystal in the electrolytic solution.The party
Method pair can water-feeding structure battery it is largely effective, but transformer station mostly use valve control maintenance-free type lead-acid accumulator,
This method is infeasible, is unfavorable for keeping the security feature of accumulator without maintenance closing.
Large current charge method is exactly to being in micro- gassing state by battery using large current charge, being rushed using bubbing
The sulfuric acid leading crystal of brush polar board surface, this method bubbing easily together washes away the active material on pole plate, therefore only fits
For slight sulfation, while the control of large current charge requires high, and one has and battery will be caused seriously to overcharge accidentally, no
Beneficial to battery stable operation.
Chemical method is close with hydrotherapy principle, and difference is to replace former electrolyte, and special using specific chemical solvent
Door dissolving vulcanization crystal, desulfuration positive effect, but process is complicated as hydrotherapy, is not suitable for what current transformer station used
Battery types.
Impulse method is the desulfuration method that larger installations use in the market, by electric pulse caused by instantaneous pressure to crystalline substance
Body carries out discharge breakdown, and vulcanization crystal is electrolysed with this.This method is simple to operate, positive effect, but pulse is generally stationarity
Pulse, do not adjusted accordingly according to storage battery vulcanization degree, control error equally easily causes gassing problem.In addition, mesh
Preceding market device still carries out pulse charge to unitary battery group, and it is still limited that individual vulcanization solves effect.
In addition, it is that unitary battery group is carried out that core, which holds experiment, therefore cell batteries are gone with sulfur functional lack of targeted,
Storage battery vulcanization difference problem cannot be solved really, core hold during charging process still cause individual overcharge of a battery or
Charge less electricity.
In order to solve the above technical problems, the technical solution adopted in the utility model is:
A kind of storage batteries of transformer substation core capacitance device with desulfuration repair function, including:Sampling and polling module, controllable put
Electric module, desulfuration activation execution module, control decision module, state handover module, human-computer interaction module;
Sampling and polling module include:Pressure measuring instrument, current measuring instrument, TEMP instrument, current measuring instrument are serially connected with
Anode output end, pressure measuring instrument simultaneously connect battery both ends, and TEMP instrument is arranged on battery cell case, thus can travel through and obtain
Batteries power supply state, battery pack terminal voltage, each single battery terminal voltage, battery fill discharge current, battery temperature
Degree;
Controlled discharge module adjusts the electric discharge electricity that discharge module respectively performs monomer according to the output order of control decision module
Resistance, carries out target controlled discharge to the single batteries of batteries, and execution result back is to control decision module;It is controllable to put
Electric module performs monomer composition by multiple electric discharges, and each electric discharge performs the list that monomer is connected to battery reference numeral by wiring
Body, the desulfuration charging with desulfuration activation execution module perform monomer road output altogether;
Desulfuration activates execution module according to the output order of control decision module, flexibly realizes and fills and two kinds of pulse charge
Mode, pulse amplitude and width are adjusted in pulse charge and discharge process, sulphur removal is exported to the target single battery of batteries
Pulse, and execution result back is to control decision module;Desulfuration activates execution module and performs monomer composition by the charging of multiple desulfurations,
Each desulfuration charging performs the monomer that monomer is connected to battery reference numeral by wiring, the execution list with controlled discharge module
Ti Gong roads export;
State handover module includes:The dc circuit breaker of controllable type, installed in batteries totality connection jaws, according to control
The state switching of batteries is realized in decision-making module order, and feedback information is to control decision module after being finished;
Decision Control module receives sampling and polling module, state handover module, human-computer interaction module, controllable discharge and recharge mould
The input feedback of block and desulfuration activation execution module, the control command responded is exported to sampling and inspection mould by decision making algorithm
Block, state handover module, human-computer interaction module, controllable charge-discharge modules and desulfuration activation execution module;
Human-computer interaction module realizes that user starts to the parameter setting of apparatus function and control by human-computer interaction module, connects
The telemetry intelligence (TELINT) of Decision Control module output is received, battery condition amount is shown and realizes abnormality alarming function.
Preferably, a kind of storage batteries of transformer substation core capacitance device with desulfuration repair function also includes:Power supply is supplied
Module, communication interface, selftest module.
Preferably, the human-computer interaction module also includes:Screen, sound equipment, button, light.
Compared with prior art, beneficial effect is:
1st, difference desulfuration repair function is realized, solves the problems, such as that storage battery vulcanization degree differs;
2nd, the accumulator capacity after desulfuration, the true energy storage capacity of effective detection battery are calculated.
A kind of battery core holds method, comprises the following steps:
S1, start, be transferred to step S2;
S2, battery condition is detected, is transferred to step S3;
S3, check whether batteries state is normal, and normal condition is transferred to step S4, and abnormal state is transferred to step S7;
S4, it is determined whether enter reparation core and hold state, be transferred to step S5 into core appearance state is repaired, do not enter and repair core appearance
State is transferred to step S9;
S5, repair core and hold, show that core holds result, it is not abnormal to be transferred to step S6 if abnormal be transferred to step S7;
S6, batteries state switching control, is transferred to step S9;
S7, alarm output, it is transferred to step S8;
S8, overhaul plan, it is transferred to step S10;
S9, it is determined whether extractor, exit and be transferred to S10, do not exit and retract S2;
S10, terminate.
Wherein, step S5 reparation core holds, and show that core holds result and comprised the following steps:
Step 1:Battery whole group constant-current discharge forms target battery group T1 to end condition 1 according to final discharging voltage;
Step 2:Battery whole group constant-current charge forms target battery group T2 to end condition 2 according to voltage increase rate;
Step 3:It is determined that vulcanization target battery combination of monomers T3, the desulfuration that self-loopa adjustment is performed for T3 activates charging;
Step 4:Battery whole group constant-voltage charge is to end condition 3;
Step 5:Step 1 is performed, records discharge capacity 1;
Step 6:Step 2 and 4 is performed, then performs step 1, records discharge capacity 2;
Step 7:High-volume whether capacity meets minimum standard, signal feedback to accounting analysis twice.
Further, batteries constant-current discharge uses following methods in step 1:Discharge rate is carried out to target batteries
Whole group constant-current discharge, discharge time is recorded, reached when detection has monomer voltage decline under preset termination voltage or whole group voltage
Stop constant-current discharge when dropping to overall preset termination voltage, record the voltage after discharge time and the electric discharge of each single battery
Value, while record the discharge electricity amount Q1 of whole group batteries.
Further, batteries constant-current discharge uses following methods in step 2:Target batteries are filled with carrying out constant current
Electricity, each battery cell voltage will raise, and stop constant-voltage charge when monomer voltage be present and reach, and record duration of charge, meter
This time any battery voltage changing rate is V in charging process.
Further, the desulfuration activation charging for self-loopa adjustment being performed for T3 uses following methods:To target battery monomer
Export the direct impulse charging in continuous k cycle, dutycycle Tz, charge capacity Qc, subject monomers are exported afterwards reverse
Voltage discharges monomer, discharge electricity amount Qd, control discharge time to make QdEqual to the discharge electricity amount Q of whole group batteries1, entirely
Process is that a desulfuration activates charge and discharge process;Circulation performs desulfuration activation charge and discharge process, record kth time subject monomers voltage
For Uki, wherein i ∈ T3, work as UkiLess than U(k-1)iWhen, represent that desulfuration activation is effective, according to UkiWith U(k-1)iPhase difference adjustment increase
Direct impulse amplitude, reduce pulse duty factor, until front and rear voltage phase difference twice meets after circulation performs desulfuration activation discharge and recharge
Minimum sets requirement or the highest cycle-index for reaching setting, desulfuration activation charging process stop.
Compared with prior art, beneficial effect is:
1st, the confirmation method of target curable monomer, battery of effectively pinpointing the problems are proposed;
2nd, the intelligent control method of desulfuration reparation is proposed, is incorporated during battery core appearance.
Brief description of the drawings
Fig. 1 is the utility model core capacitance device scheme of installation.
Fig. 2 is the utility model core capacitance device workflow diagram.
Fig. 3 is that the utility model battery repairs core appearance step sketch.
Description of reference numerals:
1-#1 batteries;11—#1 DC;12-dc circuit breaker K1;13-#1 temperature, voltage, sensor signal
Line;2-#2 batteries;21—#2 DC;22-dc circuit breaker K2;23-#2 temperature, voltage, sensor signal lines;3—
Electric discharge performs monomer;31-control of discharge;The charging of 4-desulfuration performs monomer;41-desulfuration charge control;5-Decision Control mould
Block;6-human-computer interaction module;7-charger.
Embodiment
Accompanying drawing being given for example only property explanation, it is impossible to be interpreted as the limitation to this patent;It is attached in order to more preferably illustrate the present embodiment
Scheme some parts to have omission, zoom in or out, do not represent the size of actual product;To those skilled in the art,
Some known features and its explanation may be omitted and will be understood by accompanying drawing.Being given for example only property of position relationship described in accompanying drawing
Explanation, it is impossible to be interpreted as the limitation to this patent.
As shown in figure 1, the utility model devises a kind of storage batteries of transformer substation core capacitance device with desulfuration repair function
And method, it can not only realize that battery holds from kinetonucleus, and hold the charge and discharge process tested using core and realize individual desulfuration
Mobilizing function, make single battery be in optimum state, solve the problems, such as vulcanization, it is ensured that battery effectively uses capacity.
As shown in figure 1, a kind of storage batteries of transformer substation core capacitance device with desulfuration repair function, including:Sampling and inspection
Module, controlled discharge module, desulfuration activation execution module, control decision module, state handover module, human-computer interaction module, with
And other necessary device provisioning modules.
Sampling and polling module:Sampling and polling module are by pressure measuring instrument, current measuring instrument, TEMP instrument and corresponding
Railway superstructures, current measuring instrument is serially connected with anode output end, and pressure measuring instrument simultaneously connects battery both ends, TEMP instrument peace
Mounted in battery cell case, the power supply state for obtaining batteries, battery pack terminal voltage, each single battery end electricity thus can be traveled through
Pressure, battery fill discharge current, battery temperature etc..
Controlled discharge module:According to the output order of control decision module, adjustment discharge module respectively performs the electric discharge of monomer
Resistance, carries out target controlled discharge to the single batteries of #1 or #2 group storage battery groups, and execution result back is to control decision
Module.Controlled discharge module performs monomer 3 by multiple electric discharges and formed, and each electric discharge performs monomer 3 and is connected to electric power storage by wiring
The monomer of pond reference numeral, the execution monomer road output altogether with desulfuration activation execution module.
Desulfuration activates execution module:According to the output order of control decision module, flexibly realize and fill and pulse charge two
Kind mode, adjusts pulse amplitude and width, to the target battery list of #1 or #2 group storage battery groups in pulse charge and discharge process
Body exports sulphur removal pulse, and execution result back is to control decision module.The power supply of desulfuration activation execution module is derived from direct current system
Unite original charger 7, export to be charged by multiple desulfurations and perform monomer 4 and form, each desulfuration charging performs monomer 4 and passes through wiring
The monomer of battery reference numeral is connected to, the execution monomer road output altogether with controlled discharge module.
State handover module:Mainly it is made up of dc circuit breaker K1, K2 of controllable type, installed in batteries totality wiring
Mouthful, the state for realizing batteries according to control decision module command switches, disconnection and battery when holding desulfuration state into core
Dc circuit breaker corresponding to group, completion core recovers to close when entering on-line operation and monitor state after holding desulfuration and batteries
Corresponding dc circuit breaker, feedback information is to control decision module after being finished.
Decision Control module:Receive sampling and polling module, state handover module, human-computer interaction module, controllable discharge and recharge
The input feedback of module and desulfuration activation execution module, the control command responded is exported to other modules by decision making algorithm, it is main
Realize following two big functions:
1)On-line monitoring.Non-core holds the operation conditions for the period realizing full-time quarter each monomer of on-line monitoring battery, battery
Monomer voltage is too low or too high, temperature anomaly when send instruction control human-computer interaction module alarm, and remind corresponding excessive value, it is real
The now normal function of current battery electric energy management;
2)Core, which holds, to be repaired.Batteries are changed into core by artificial or regular Starting mode state of a control handover module to hold
Reparation state, the cell reaction result held according to core in charge and discharge process determine that desulfuration repairs target battery, perform decision making algorithm
Controlled discharge module and desulfuration is gradually controlled to activate execution module to perform to battery desulfuration reparation, and after finally giving reparation
Batteries available capacity.
Human-computer interaction module:Realize that user starts to the parameter setting of apparatus function and control by human-computer interaction module,
The telemetry intelligence (TELINT) of Decision Control module output is received, battery condition amount is effectively shown and realizes abnormality alarming function.Main bag
Include screen, sound equipment, button, light etc..
Other necessary device provisioning modules:Including power supply supply, communication interface, selftest module etc..
Storage batteries of transformer substation core capacitance device is efficiently mounted in two group storage batteries(Big multi-Substation is supplied using double batteries
Electricity, hold repair function as needed setting to start core by manual command without if).
Sampling by device and each monomer voltage of polling module real-time collecting batteries, temperature shape during normal operation
State, and when judging whether voltage or temperature value exceed preset value by Decision Control module, sent out when abnormal by human-computer interaction module
Go out warning information.
Repair function is held according to manual command and preset time starting storage battery core, workflow diagram is shown in Fig. 2.
S1, start, be transferred to step S2;
S2, battery condition is detected, is transferred to step S3;
S3, check whether batteries state is normal, and normal condition is transferred to step S4, and abnormal state is transferred to step S9;
S4, it is determined whether enter reparation core and hold state, be transferred to step S5 into core appearance state is repaired, do not enter and repair core appearance
State is transferred to step S11;
S5, batteries state switching control;
S6, perform electric discharge-charging process of desulfuration reparation;
S7, check whether core appearance result is abnormal, is transferred to step S9 extremely, it is not abnormal to be transferred to step S8;
S8, batteries state switching control;
S9, alarm output;
S10, overhaul plan;
S11, it is determined whether extractor, exit and be transferred to S12, do not exit being transferred to S2;
S12, terminate.
Core holds restorative procedure step and refers to Fig. 3, is described in detail below:
(1)Detect target batteries(Such as #1 batteries)Each free state amount is normal(Voltage and temperature), detection is really
It is normal to be scheduled on another each free state amount of group storage battery group of fortune, detects the dc circuit breaker K1 determined in state of a control handover module
In closed position, dc circuit breaker K1 is disconnected, target batteries is completed and departs from running status, is changed into core and holds reparation state.
(2)I is carried out to target batteries10The whole group constant-current discharge of discharge rate, discharge time is recorded, when detection has list
Bulk voltage, which declines, reaches preset termination voltage Ud1Or whole group voltage drops to Ud1* stop constant-current discharge during N, record discharge time
t1yAnd the magnitude of voltage after each single battery electric discharge, i.e., it is respectively U that magnitude of voltage is completed in the electric discharge of N number of battery cell1i,i=1、
2nd, 3 ..., N, reference numeral is 1,2,3 ... N single battery respectively, while records the discharge electricity amount Q of whole group batteries1。
When there is monomer battery voltage fall off rate to meet too fast decision condition, determine that the cell batteries repair target electricity for desulfuration
Pond, voltage can obtain all desulfurations reparation target battery group T1 after carrying out evaluation calculating after discharging all monomers.
(3)To target batteries with I10Constant-current charge is carried out, each battery cell voltage will raise, when monomer voltage being present
Reach UhWhen stop constant-voltage charge, record duration of charge t2, the magnitude of voltage of N number of battery cell is respectively after stopping charging
U2i, i=1,2,3 ..., N, it is V to count any battery voltage changing rate in this charging process, then has V2i=U2i-U1i/t2,i=1,
2 ..., N, when the too fast decision condition of the rate of pressure rise that monomer voltage be present, determine that the cell batteries repair target for desulfuration
Battery, voltage can obtain all sulphur reparation target battery group T2 after carrying out evaluation measuring and calculating after discharging all monomers.
(4)Target battery group T1 and T2 are repaired to desulfuration and take common collection, desulfuration is obtained and repairs target battery group T3, to battery pack
Cell in T3 performs desulfuration activation charging, and method is first to the forward direction in target battery monomer output continuous k cycle
Pulse charge, dutycycle Tz, charge capacity Qc, backward voltage is exported to subject monomers afterwards monomer is discharged, electric discharge electricity
Measure as Qd, control discharge time to make QdEqual to Ql, whole process is that a desulfuration activates charge and discharge process.Circulation performs desulfuration and lived
Change charge and discharge process, record kth time subject monomers voltage is Uki, wherein i ∈ T3, work as UkiLess than U(k-1)iWhen, represent that desulfuration is lived
Change effectively, according to UkiWith U(k-1)iPhase difference adjustment increase direct impulse amplitude, reduces pulse duty factor, until circulation execution is gone
Front and rear voltage phase difference twice meets minimum sets requirement or reaches the highest cycle-index of setting after sulphur activation discharge and recharge, and desulfuration is lived
Change charging process to stop.
(5)It is U to carry out voltage swing to all cellshConstant-voltage charge, until all monomer voltages are more than or equal to
Preset termination voltage Ud2When, stop constant-voltage charge, complete the electric discharge-charging process once with desulfuration repair function.
(6)To second of I of whole group batteries10The whole group constant-current discharge of discharge rate, when detection has monomer voltage decline
Reach preset termination voltage Ud1Or whole group voltage drops to Ud1* stop electric discharge during N, record the discharge electricity amount of whole group batteries
Q2, it is effective discharge capacity of the target batteries after desulfuration repair process, and each monomer battery voltage is recorded, to whole group
Batteries perform step 3 to 5 successively, then whole group batteries are carried out with third time constant-current discharge and records whole process and is put
Power consumption Q3, take min(Q2、Q3)For the measurement capacity of core capacitance device, Decision Control module sends alarm during less than preset requirement value
Signal is to human-computer interaction module.
(7)Recover the working condition of target batteries, monitoring determines the voltage of each cell of target batteries, temperature
After degree meets the requirements, dc circuit breaker K1 is closed, target batteries is completed and departs from core appearance reparation state, be changed into operation shape
State.
Obviously, above-described embodiment of the present utility model is only intended to clearly illustrate the utility model example, and
It is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, in described above
On the basis of can also make other changes in different forms.There is no need and unable to give all embodiments
It is exhaustive.All made within spirit of the present utility model and principle all any modification, equivalent and improvement etc., should be included in
Within the protection domain of the utility model claims.
Claims (3)
1. a kind of storage batteries of transformer substation core capacitance device, including:Sampling and polling module, controlled discharge module, desulfuration activation execution
Module, control decision module, state handover module, human-computer interaction module;
Sampling and polling module include:Pressure measuring instrument, current measuring instrument, TEMP instrument, current measuring instrument are serially connected with battery
Cathode output end, pressure measuring instrument simultaneously connect battery both ends, and TEMP instrument is arranged on battery cell case, thus can travel through and be stored
The power supply state of battery pack, battery pack terminal voltage, each single battery terminal voltage, battery charging/discharging electric current, battery temperature;
Controlled discharge module respectively performs the discharge resistance of monomer according to the output order of control decision module, adjustment discharge module,
Carry out target controlled discharge to the single batteries of batteries, and execution result back is to control decision module;Controlled discharge
Module performs monomer composition by multiple electric discharges, and each electric discharge performs the list that monomer is connected to battery reference numeral by wiring
Body, the desulfuration charging with desulfuration activation execution module perform monomer road output altogether;
Desulfuration activates output order of the execution module according to control decision module, flexibly realizes and fills and two kinds of sides of pulse charge
Formula, pulse amplitude and width are adjusted in pulse charge and discharge process, sulphur removal arteries and veins is exported to the target single battery of batteries
Punching, and execution result back is to control decision module;Desulfuration activates execution module and performs monomer composition by the charging of multiple desulfurations, often
Individual desulfuration charging performs the monomer that monomer is connected to battery reference numeral by wiring, the execution monomer with controlled discharge module
Road output altogether;
State handover module includes:The dc circuit breaker of controllable type, installed in batteries totality connection jaws, according to control decision
Module command realizes the state switching of batteries, and feedback information is to control decision module after being finished;
Decision Control module receive sampling and polling module, state handover module, human-computer interaction module, controllable charge-discharge modules and
Desulfuration activates the input feedback of execution module, and the control command responded is exported to sampling and polling module, shape by decision making algorithm
State handover module, human-computer interaction module, controllable charge-discharge modules and desulfuration activation execution module;
Human-computer interaction module realizes that user starts to the parameter setting of apparatus function and control by human-computer interaction module, and reception is determined
The telemetry intelligence (TELINT) of plan control module output, show battery condition amount and realize abnormality alarming function.
2. storage batteries of transformer substation core capacitance device according to claim 1, it is characterised in that:Also include:Power supply module,
Communication interface, selftest module.
3. storage batteries of transformer substation core capacitance device according to claim 1, it is characterised in that:The human-computer interaction module also wraps
Include:Screen, sound equipment, button, light.
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CP02 | Change in the address of a patent holder | ||
CP02 | Change in the address of a patent holder |
Address after: 516001 Huizhou Avenue, Huicheng District, Huizhou, Guangdong Province, No. 19 Patentee after: HUIZHOU POWER SUPPLY BUREAU, GUANGDONG POWER GRID CO., LTD. Address before: 516001 Huizhou Avenue, Huicheng District, Guangzhou, Guangdong Province, No. 19 Patentee before: HUIZHOU POWER SUPPLY BUREAU, GUANGDONG POWER GRID CO., LTD. |