CN110045313A - Three-phase energy-storage system ammeter current transformer connecting detection method - Google Patents
Three-phase energy-storage system ammeter current transformer connecting detection method Download PDFInfo
- Publication number
- CN110045313A CN110045313A CN201910205915.9A CN201910205915A CN110045313A CN 110045313 A CN110045313 A CN 110045313A CN 201910205915 A CN201910205915 A CN 201910205915A CN 110045313 A CN110045313 A CN 110045313A
- Authority
- CN
- China
- Prior art keywords
- power
- ammeter
- phase
- changing value
- setting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention relates to it is a kind of applied in three-phase energy-storage system with detect ammeter therein connection whether wrong three-phase energy-storage system ammeter current transformer connecting detection method, its overall thought is can be under the premise of software sends particular meter detection instruction, execute the charge and discharge movement of multiple certain power, and after charge-discharge electric power is stablized, judge whether the charge-discharge electric power of movement and direction and the setting of ammeter changed power is with uniformity, so that it is determined that whether ammeter connection is wrong.The present invention can rapidly and accurately judge the connection of each phase ammeter, work normally bring interference to energy-storage system consequently facilitating solving ammeter current transformer and not connecting correctly, the self-checking function of energy-storage system may be implemented.
Description
Technical field
The invention belongs to the application fields that ammeter uses to relate to especially for the ammeter being arranged in three-phase energy-storage system
And it is a kind of to the ammeter connection whether the wrong method detected.
Background technique
It is well known that ammeter is an indispensable part, by connecing in the electricity at end of registering one's residence in energy-storage system now
Table, energy-storage system can perceive the electricity consumption situation entirely registered one's residence, to realize the spontaneous of system power by this electricity consumption value
It is personal, realize the maximum utilizationization of energy-storage system.Likewise, ammeter is even more to play key effect in counterflow-preventing field, for
Many does not allow the national safety of grid-connected power, is realized by being controlled the grid-connected power that ammeter detects.
For the ammeter of external current transformer (CT), because current transformer (CT) need to be only stuck in the AC at former end of registering one's residence by it
Line does not need to destroy former AC wiring, and is widely used, and correct wiring is as shown in Figure 1.But it sends out in practical applications
It is existing, three-phase four-wire system is used in the practical application of three-phase energy-storage system, in addition three current transformers (CT) of three-phase kilowatt-hour meter connect
Mouthful, ammeter misconnection is extremely likely to occur, the case where reversal connection.Wiring rules are not being known about, there may be 192 kinds of wiring under random case
Mode, wherein only a kind of is correct wiring, the case where misconnection, which will lead to whole system, to be worked normally as desired.
For the generation for avoiding such mistake, once according to the characteristic of system, to be necessarily smaller than energy storage inverse for the electrical power of selling of power grid
Become the output power of device, therefore calculate the difference that energy storage inverter output power and ammeter sell electricity, if negative value it may be considered that
Ammeter reversal connection.But this scheme can only be judged to load in larger situation, actual electric network buys the situation of electricity, and the program is only
Suitable for single photovoltaic energy storage inverter system, for possessing more inverters or carrying out AC coupling, DC coupling to inverter
Energy storage modernization system, the judgment method is entirely ineffective.
To sum up, the prior art has the following deficiencies:
Firstly, existing technical solution is primarily related to monophase system field, and three-phase system compares monophase system, because it is multiple
Polygamy, there are the probability of ammeter CT misconnection to be much higher than monophase system.
Secondly, the prior art has one-sidedness in the application of single photovoltaic energy storage inverter system, institute can not be judged
There is the case where ammeter reversal connection, and is unable to satisfy the demand of more inverter systems and energy storage modernization system.
Summary of the invention
The object of the present invention is to provide a kind of ammeters suitable for three-phase energy-storage system, accurately whether can detect wiring
Wrong three-phase energy-storage system ammeter current transformer connecting detection method.
In order to achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of three-phase energy-storage system ammeter current transformer connecting detection method is applied in three-phase energy-storage system to detect wherein
Ammeter connection it is whether wrong, it is characterised in that: the three-phase energy-storage system ammeter current transformer connecting detection method are as follows:
Dividing M times makes the three-phase energy-storage system discharge according to the different discharge powers of setting, then a point n times store up the three-phase
Energy system charges according to the different charge powers of setting, and M, N are the positive integer greater than 4；
In each charged/discharged, changing value and the change of the general power that this charged/discharged front and back ammeter detects are judged
Whether discharge power/charge power the changing value and change direction for changing direction and setting are with uniformity,
If the change direction for the general power that this time ammeter detects before and after charged/discharged and discharge power/charging of setting
Power changes in the opposite direction, and the changing value for the general power that this time ammeter detects before and after charged/discharged is put with fixed
Electrical power/charge power changing value is with uniformity, then count is incremented for ammeter reversal connection, and ammeter just connects counting and resets；
If the change direction for the general power that this time ammeter detects before and after charged/discharged and discharge power/charging of setting
The change direction of power is identical, and the changing value for the general power that this time ammeter detects before and after charged/discharged is put with fixed
Electrical power/charge power changing value is with uniformity, then ammeter is just connecing that count is incremented；
If the change direction for the general power that this time ammeter detects before and after charged/discharged and discharge power/charging of setting
Power change in the opposite direction or it is identical, and the changing value for the general power that this time described ammeter detects before and after charged/discharged with
Discharge power/charge power changing value of setting does not have consistency, then further judges that each phase current mutual inductor is detected
One third and variation side to discharge power/charge power changing value of the changing value and change direction and setting of phase power
To whether with uniformity；
If discharge power/charge power variation of the change direction of phase power and setting detected by a phase current mutual inductor
Direction is identical, and discharge power/charge power of the changing value of phase power and setting detected by the phase current mutual inductor
The one third of changing value is with uniformity, then the phase ammeter is just connecing that count is incremented, and phase ammeter reversal connection, which counts, to reset；
If discharge power/charge power variation of the change direction of phase power and setting detected by a phase current mutual inductor
It is contrary, and discharge power/charge power of the changing value of phase power and setting detected by the phase current mutual inductor
The one third of changing value is with uniformity, then count is incremented for phase ammeter reversal connection, which just connects counting and reset；
If a phase ammeter, which just connects counting, is greater than preset number J, J is the positive integer greater than 2, then marks the connection shape of the phase ammeter
State is correct connection, if phase ammeter reversal connection, which counts, is greater than preset number J, it is anti-for marking the connection status of the phase ammeter
It connects；
During charged/discharged, if ammeter, which just connects, counts Continuous accumulation to K, K is the positive integer greater than 2, then by the ammeter
Connection status be judged as correct connection；
After completing each electric discharge, charging, if ammeter reversal connection, which counts, meets or exceeds L, L=(M+N) * 60%, then by the ammeter
Connection status be judged as reversal connection；If ammeter reversal connection, which counts, is not up to L, by the phase or polyphase meter of unmarked connection status
Connection status be judged as correct connection.
Preferably, general power change threshold is preset, if the variation for the general power that the ammeter detects before and after charged/discharged
The range that the absolute value of value and the sum of discharge power/charge power changing value of setting is limited in the general power change threshold
It is interior, then the change direction for the general power that this time ammeter detects before and after charged/discharged and discharge power/charging function of setting
Rate changes in the opposite direction, and the changing value for the general power that this time ammeter detects before and after charged/discharged and fixed electric discharge
Power/charge power changing value is with uniformity；If the changing value for the general power that the ammeter detects before and after charged/discharged
The range limited with the absolute value of the difference of discharge power/charge power changing value of setting in the general power change threshold
It is interior, then the change direction for the general power that this time ammeter detects before and after charged/discharged and discharge power/charging function of setting
The change direction of rate is identical, and the changing value for the general power that this time ammeter detects before and after charged/discharged and fixed electric discharge
Power/charge power changing value is with uniformity.
Preferably, the general power change threshold is set as the 10% of discharge power/charge power changing value of setting.
Preferably, preset phase changed power threshold value, if the changing value of power detected by a phase current mutual inductor with set
What the absolute value of the difference of the one third of fixed discharge power/charge power changing value was limited in the phase changed power threshold value
In range, then discharge power/charge power change of the change direction of power detected by the phase current mutual inductor and setting
It is identical to change direction, and discharge power/charge power of the changing value of power detected by the phase current mutual inductor and setting
The one third of changing value is with uniformity；If the changing value of power detected by a phase current mutual inductor and the electric discharge of setting
The absolute value of the sum of power/charge power one third of changing value in the range of the phase changed power threshold value limits,
Then discharge power/charge power change direction phase of the change direction of power detected by the phase current mutual inductor and setting
Instead, and the changing value of power detected by the phase current mutual inductor and discharge power/charge power changing value of setting
One third is with uniformity.
Preferably, the phase changed power threshold value is set as the 4% of discharge power/charge power changing value of setting.
Preferably, in the three-phase energy storage system discharges, the discharge power to discharge every time is according to preset discharge rate ladder
Degree is gradually incremented by；In three-phase energy-storage system charging, the charge power to charge every time is according to preset charge power gradient
Gradually it is incremented by.
Preferably, it be 5, J value be 3, K value is 3 that M value, which is 5, N value,.
Preferably, the three-phase energy-storage system starts charged/discharged and by one section of delay and when stable discharging/charging,
General power/phase power that the ammeter detects is read again.
Preferably, the delay is 10s.
Due to the above technical solutions, the present invention has the following advantages over the prior art: the present invention can be quick
Accurately judge the connection of each phase ammeter, is not connected to energy-storage system correctly just consequently facilitating solving ammeter current transformer
Often work bring interference, may be implemented the self-checking function of energy-storage system.
Detailed description of the invention
Attached drawing 1 is ammeter correct wiring schematic diagram.
Attached drawing 2 is the flow chart of three-phase energy-storage system ammeter current transformer connecting detection method of the invention.
Specific embodiment
The invention will be further described for embodiment shown in reference to the accompanying drawing.
Embodiment one: a kind of to be stored up applied in three-phase energy-storage system with detecting the whether wrong three-phase of ammeter connection therein
Energy system meter current transformer connecting detection method, overall thought can send particular meter detection instruction in software
Under the premise of, the charge and discharge movement of multiple certain power is executed, and after charge-discharge electric power is stablized, judge the dynamic of ammeter changed power
Whether the charge-discharge electric power of work and direction and setting is with uniformity, so that it is determined that whether ammeter connection is wrong.
The three-phase energy-storage system ammeter current transformer connecting detection method specifically:
So that three-phase energy-storage system is discharged according to the different discharge powers of setting point M time, then a point n times make three-phase energy-storage system by
It charges according to the different charge powers of setting.M, N is the positive integer greater than 4.In three-phase energy storage system discharges, put every time
The discharge power of electricity is gradually incremented by according to preset discharge rate gradient；In the charging of three-phase energy-storage system, the charging charged every time
Power is gradually incremented by according to preset charge power gradient.
Following judgment step is then executed in each charged/discharged:
In each charged/discharged, changing value and the variation side of the general power that this charged/discharged front and back ammeter detects are judged
To whether with uniformity with the discharge power/charge power changing value and change direction of setting.Change direction has consistent
The change direction and discharge power/charge power change direction phase of setting for the general power that the meaning of property is detected in ammeter
Together, that is, when the discharge power set/charge power incremented/decremented, the general power that ammeter detects also incremented/decremented.Changing value
Consistent meaning is the changing value for the general power that ammeter detects and discharge power/charge power variation of setting
It is worth close to identical.
If the change direction for the general power that this time ammeter detects before and after charged/discharged and discharge power/charging of setting
Power changes in the opposite direction, and the changing value and fixed electric discharge function for the general power that this time ammeter detects before and after charged/discharged
Rate/charge power changing value is with uniformity, then shows that ammeter is reversely connected, and count is incremented for ammeter reversal connection at this time, and ammeter is just connecing counting
It resets.
Specifically judge the method for consistency are as follows: default general power change threshold, usual general power change threshold setting
It is the 10% of discharge power/charge power changing value of setting.
If the changing value for the general power that ammeter detects before and after charged/discharged and discharge power/charge power of setting
In the range of general power change threshold limits, then this time ammeter detects the absolute value of the sum of changing value before and after charged/discharged
The change direction of general power and discharge power/charge power of setting change in the opposite direction, and this time before and after charged/discharged
The changing value for the general power that ammeter detects and fixed discharge power/charge power changing value are with uniformity.
If the change direction for the general power that this time ammeter detects before and after charged/discharged and discharge power/charging of setting
The change direction of power is identical, and the changing value and fixed electric discharge function for the general power that this time ammeter detects before and after charged/discharged
Rate/charge power changing value is with uniformity, then shows that ammeter just connects, and ammeter is just connecing that count is incremented at this time.
Specifically judge the method for consistency are as follows: if the changing value for the general power that ammeter detects before and after charged/discharged and
The absolute value of the difference of discharge power/charge power changing value of setting general power change threshold limit in the range of, then this
The change direction for the general power that ammeter detects before and after secondary charged/discharged and discharge power/charge power variation side of setting
To identical, and the changing value and fixed discharge power/charge power for the general power that this time ammeter detects before and after charged/discharged
Changing value is with uniformity.
If the change direction for the general power that this time ammeter detects before and after charged/discharged and discharge power/charging of setting
Power change in the opposite direction or identical, and the changing value for the general power that this time ammeter detects before and after charged/discharged and setting
Discharge power/charge power changing value do not have consistency, then further judge phase detected by each phase current mutual inductor
The one third and change direction of discharge power/charge power changing value of the changing value and change direction and setting of power be
It is no with uniformity.
If discharge power/charge power of the change direction of phase power and setting detected by a phase current mutual inductor
Change direction is identical, and the discharge power of the changing value of phase power and setting detected by the phase current mutual inductor/charging function
The one third of the changing value of rate is with uniformity, then shows that the phase ammeter just connects, and the phase ammeter is just connecing that count is incremented at this time, should
The reversal connection of phase ammeter, which counts, to reset.
Specifically judge the method for consistency are as follows: default phase changed power threshold value, usual phase changed power threshold value are set as
The 4% of discharge power/charge power changing value of setting.
If the changing value of power detected by a phase current mutual inductor and discharge power/charge power variation of setting
The absolute value of the difference of the one third of value is in the range of phase changed power threshold value limits, then detected by the phase current mutual inductor
Power change direction it is identical as discharge power/charge power change direction of setting, and the phase current mutual inductor is examined
The one third of discharge power/charge power changing value of the changing value and setting of the power measured is with uniformity.
If discharge power/charge power of the change direction of phase power and setting detected by a phase current mutual inductor
It changes in the opposite direction, and the discharge power of the changing value of phase power and setting detected by the phase current mutual inductor/charging function
The one third of the changing value of rate is with uniformity, then shows that the phase ammeter is reversely connected, and count is incremented for phase ammeter reversal connection at this time, should
Phase ammeter just connects counting and resets.
Specifically judge the method for consistency are as follows: if the changing value of power detected by a phase current mutual inductor and setting
The sum of discharge power/charge power one third of changing value the range that is limited in phase changed power threshold value of absolute value
It is interior, then discharge power/charge power variation side of the change direction of power detected by the phase current mutual inductor and setting
To on the contrary, and the changing value of power detected by the phase current mutual inductor and discharge power/charge power variation of setting
The one third of value is with uniformity.
After the judgment step of the above phase ammeter, is just connecing counting/reversal connection according to each phase ammeter is corresponding and counting to get
Judging result, specifically: if a phase ammeter just connects counting and is greater than preset number J, J is the positive integer greater than 2, then marks the phase
The connection status of ammeter is correct connection, if phase ammeter reversal connection counting is greater than preset number J, marks the company of the phase ammeter
State is connect as reversal connection.If a phase ammeter is just connecing counting and reversal connection counts and is not up to preset number J, this is mutually unmarked company
Connect a phase of state.
During charged/discharged, if ammeter, which just connects, counts Continuous accumulation to K, K is the positive integer greater than 2, then by ammeter
Connection status be judged as correct connection.
And after completing each electric discharge, charging, it, then will be electric if ammeter reversal connection, which counts, meets or exceeds L, L=(M+N) * 60%
The connection status of table is judged as reversal connection.If ammeter reversal connection, which counts, is not up to L, by a phase or the multiphase electricity of unmarked connection status
The connection status of table is judged as incorrect connection.
In above scheme, three-phase energy-storage system starts charged/discharged and by one section of delay and when stable discharging/charging,
General power/phase power that ammeter detects is read again.
In above scheme, it is contemplated that the variable quantity of ammeter is also related to the generated energy of PV panel, therefore cannot be with single
Judging result judgement ammeter just connects or is reversely connected situation, therefore devises K, L.Only continuous K judgement ammeter is positive the feelings connect
Condition, or the case where there are the L above ammeter is reversely connected in judging at M+N times, judges the case where ammeter is is reversely connected.In the case of other,
Prompt checks route there are other abnormal (perhaps CT is correctly to be buckled on AC route for ammeter damage) families of entertaining guests or examines again
Survey ammeter CT.
It is 5, J value be 3, K value is 3, L=6, three-phase storage that based on above scheme and wherein M value, which is 5, N value,
The detailed process of energy system meter current transformer connecting detection method is as shown in Fig. 2 comprising following steps:
Step 1: since ammeter is only run in alternating current under normal circumstances, ammeter enters grid-connect mode, then executes step 2.
Step 2: judging whether the communication of ammeter is normal, if normal, thens follow the steps 3: it is logical then to return to ammeter if abnormal,
Abnormal results are interrogated, prompt to check whether ammeter or connection are normal, then return.
Step 3: judging whether the CT detection flag bit of ammeter is set, if so, connecting detection state/stream should be entered
Journey executes step 4: if otherwise returning.
Step 4: the CT connection status flag bit of ammeter is reset, three-phase energy-storage system charge-discharge electric power zero (initial
Current power is set as 0W), m=0 is enabled, n=0, m are the counting of discharge counter, and n is the counting of charging counter, are then executed
Step 5:
Step 5: whether true judging m < 5, if so, thening follow the steps 6, then follow the steps 7 if not.
Step 6: first reading each phase current mutual inductor inspection of general power Pmeter_m and ammeter that current ammeter detects
The power P meterX, X=1,2 of the phase measured, 3, then carry out three-phase energy-storage system according to set this time discharge power
Electric discharge, and the discharge power that three-phase energy-storage system next time is arranged is (m+1) * 500W, i.e., in the present embodiment, preset discharge rate
Gradient is 500W, i.e., the changing value Δ Pac=500W for the discharge power that electric discharge front and back is set every time, then m++, and executes step
9。
Step 7: whether true n < 5 is judged, if so, 8 are thened follow the steps, if it is not, thening follow the steps 27.
Step 8: first reading each phase current mutual inductor inspection of general power Pmeter_n and ammeter that current ammeter detects
The power P meterX, X=1,2 of the phase measured, 3, then carry out three-phase energy-storage system according to set this time charge power
Charging, and the charge power that three-phase energy-storage system next time is arranged is (n+1) * 500W, i.e., in the present embodiment, preset charge rate
Gradient is 500W, i.e., the changing value Δ Pac=500W for the charge power that charging front and back is set every time, then n++, and executes step
9。
Step 9: waiting delay 10s to stable discharging/charging.
Step 10: when reading general power P ' the meter_m(electric discharge that current ammeter detects) when/P ' meter_n(charging),
The changing value Δ Pmeter=P ' meter_m-Pmeter_m for the general power that this time electric discharge front and back ammeter detects is calculated, or this time
The changing value Δ Pmeter=P ' meter_n-Pmeter_n for the general power that charging front and back ammeter detects.Default general power variation
Threshold value is 50W, then judges the changing value Δ Pmeter for the general power that charged/discharged front and back ammeter detects and the electric discharge function of setting
The absolute value of the sum of rate/charge power changing value Δ Pac, if in the range of general power change threshold 50W is limited, that is, sentence
Whether disconnected -50≤Δ Pmeter+ Δ Pac≤50 are true, if so, 11 are thened follow the steps, if it is not, thening follow the steps 12.
Step 11: count is incremented for the ammeter reversal connection that ammeter reversal connection counter is recorded, and ammeter is just connecing the electricity that counter is recorded
Table just connects counting and resets, then return step 5.
Step 12: judging the changing value Δ Pmeter of general power and putting for setting that charged/discharged front and back ammeter detects
The absolute value of the difference of electrical power/charge power changing value Δ Pac, if in the range of general power change threshold 50W is limited,
That is whether judgement -50≤Δ Pmeter- Δ Pac≤50 are true, if so, 13 are thened follow the steps, if it is not, thening follow the steps 16.
Step 13: ammeter is just connecing the ammeter that counter is recorded and is just connecing that count is incremented, then executes step 14.
Step 14: judge ammeter just connect count > 3 it is whether true, if so, 15 are thened follow the steps, if it is not, then return step
5。
Step 15: the connection status of ammeter being judged as correct connection, is correct by ammeter CT connection status mark position
Then connection executes step 30.
Step 16: enabling X=1, then execute step 17.
Step 17: reading the power P ' meterX that current X phase current mutual inductor detects, calculate this charged/discharged
Changing value Δ PmeterX=P ' meterX-PmeterX of power detected by the phase current mutual inductor of front and back.Default phase power
Change threshold is 20W, then judges the changing value Δ of power detected by the phase current mutual inductor of charged/discharged front and back
The absolute value of the difference of the one third Δ Pac/3 of PmeterX and discharge power/charge power changing value of setting, if
In the range of phase changed power threshold value 20W is limited, i.e. whether judgement -20≤Δ PmeterX- Δ Pac/3≤20 are true, if so,
18 are thened follow the steps, if it is not, thening follow the steps 21.
Step 18:X phase ammeter, which just connects, to be counted the X phase ammeter of record and is just connecing that count is incremented, and X phase ammeter is reversely connected counter records
X phase ammeter reversal connection count reset, then execute step 19.
Step 19: judge X phase ammeter just connect count > 3 it is whether true, if so, 20 are thened follow the steps, if it is not, then executing step
Rapid 25.
Step 20: the connection status of label X phase ammeter is correct connection, i.e., by the CT connection status flag bit of X phase ammeter
It is set to correct connection, then executes step 25.
Step 21: judging the changing value Δ PmeterX of power detected by the phase current mutual inductor of charged/discharged front and back
With the absolute value of the sum of the one third Δ Pac/3 of discharge power/charge power changing value of setting, if become in phase power
In the range of changing threshold value 20W restriction, i.e. whether judgement -20≤Δ PmeterX+ Δ Pac/3≤20 are true, if so, executing step
Rapid 22.
Count is incremented for the X phase ammeter reversal connection of step 22:X phase ammeter reversal connection counting record, and X phase ammeter just connects counter records
X phase ammeter just connect counting reset, then execute step 23.
Step 23: judging whether X phase ammeter reversal connection counting > 3 is true, if so, 24 are thened follow the steps, if it is not, then executing step
Rapid 25.
Step 24: the connection status of label X phase ammeter is reversal connection, i.e., is by the CT connection status mark position of X phase ammeter
Then reversal connection executes step 25.
Then step 25:X+1 executes step 26.
Step 26: judge whether X > 3 is true, if so, return step 5, if it is not, then return step 17.
Step 27: judging whether ammeter reversal connection counting > 6 is true, if so, 28 are thened follow the steps, if it is not, thening follow the steps
29。
Step 28: the connection status of ammeter being judged as reversal connection, is reversal connection by ammeter CT connection status mark position, then
Execute step 30.
Step 29:CT detection time-out, a phase of unmarked connection status or the connection status of polyphase meter are judged as not just
Corresponding CT connection status mark position is incorrect connection, then executes step 30 by really connection.
Step 30: the CT of clear ammeter detects flag bit, and clear ammeter is just connecing counter and ammeter reversal connection counter, then returning
It returns.
This programme carries out self-test to ammeter function according to the demand of inspection, can fast and accurately position the connection feelings of each phase ammeter
Condition, the good orientation problem of assisting user, debugging, thus solve ammeter CT do not connect correctly it is normal to energy-storage system
The bring that works interference.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (9)
1. a kind of three-phase energy-storage system ammeter current transformer connecting detection method, applied in three-phase energy-storage system to detect it
In ammeter connection it is whether wrong, it is characterised in that: the three-phase energy-storage system ammeter current transformer connecting detection method are as follows:
Dividing M times makes the three-phase energy-storage system discharge according to the different discharge powers of setting, then a point n times store up the three-phase
Energy system charges according to the different charge powers of setting, and M, N are the positive integer greater than 4；
In each charged/discharged, changing value and the change of the general power that this charged/discharged front and back ammeter detects are judged
Whether discharge power/charge power the changing value and change direction for changing direction and setting are with uniformity,
If the change direction for the general power that this time ammeter detects before and after charged/discharged and discharge power/charging of setting
Power changes in the opposite direction, and the changing value for the general power that this time ammeter detects before and after charged/discharged is put with fixed
Electrical power/charge power changing value is with uniformity, then count is incremented for ammeter reversal connection, and ammeter just connects counting and resets；
If the change direction for the general power that this time ammeter detects before and after charged/discharged and discharge power/charging of setting
The change direction of power is identical, and the changing value for the general power that this time ammeter detects before and after charged/discharged is put with fixed
Electrical power/charge power changing value is with uniformity, then ammeter is just connecing that count is incremented；
If the change direction for the general power that this time ammeter detects before and after charged/discharged and discharge power/charging of setting
Power change in the opposite direction or it is identical, and the changing value for the general power that this time described ammeter detects before and after charged/discharged with
Discharge power/charge power changing value of setting does not have consistency, then further judges that each phase current mutual inductor is detected
One third and variation side to discharge power/charge power changing value of the changing value and change direction and setting of phase power
To whether with uniformity；
If discharge power/charge power variation of the change direction of phase power and setting detected by a phase current mutual inductor
Direction is identical, and discharge power/charge power of the changing value of phase power and setting detected by the phase current mutual inductor
The one third of changing value is with uniformity, then the phase ammeter is just connecing that count is incremented, and phase ammeter reversal connection, which counts, to reset；
If discharge power/charge power variation of the change direction of phase power and setting detected by a phase current mutual inductor
It is contrary, and discharge power/charge power of the changing value of phase power and setting detected by the phase current mutual inductor
The one third of changing value is with uniformity, then count is incremented for phase ammeter reversal connection, which just connects counting and reset；
If a phase ammeter, which just connects counting, is greater than preset number J, J is the positive integer greater than 2, then marks the connection shape of the phase ammeter
State is correct connection, if phase ammeter reversal connection, which counts, is greater than preset number J, it is anti-for marking the connection status of the phase ammeter
It connects；
During charged/discharged, if ammeter, which just connects, counts Continuous accumulation to K, K is the positive integer greater than 2, then by the ammeter
Connection status be judged as correct connection；
After completing each electric discharge, charging, if ammeter reversal connection, which counts, meets or exceeds L, L=(M+N) * 60%, then by the ammeter
Connection status be judged as reversal connection；If ammeter reversal connection, which counts, is not up to L, by the phase or polyphase meter of unmarked connection status
Connection status be judged as correct connection.
2. three-phase energy-storage system ammeter current transformer connecting detection method according to claim 1, it is characterised in that: pre-
If general power change threshold, if the electric discharge function of the changing value for the general power that the ammeter detects before and after charged/discharged and setting
The absolute value of the sum of rate/charge power changing value then this time discharges/fills in the range of the general power change threshold limits
The change direction and discharge power/charge power change direction phase of setting for the general power that the electric front and back ammeter detects
Instead, and this time the changing value and fixed discharge power/charge power for the general power that the ammeter detects before and after charged/discharged
Changing value is with uniformity；If the changing value for the general power that the ammeter detects before and after charged/discharged and the electric discharge function of setting
The absolute value of the difference of rate/charge power changing value is then this time discharged/is filled in the range of the general power change threshold limits
The change direction and discharge power/charge power change direction phase of setting for the general power that the electric front and back ammeter detects
Together, and this time the changing value and fixed discharge power/charge power for the general power that the ammeter detects before and after charged/discharged
Changing value is with uniformity.
3. three-phase energy-storage system ammeter current transformer connecting detection method according to claim 2, it is characterised in that: institute
State general power change threshold is set as discharge power/charge power changing value of setting 10%.
4. three-phase energy-storage system ammeter current transformer connecting detection method according to claim 1, it is characterised in that: pre-
If phase changed power threshold value, if discharge power/charging of the changing value of power detected by a phase current mutual inductor and setting
The absolute value of the difference of the one third of the changing value of power is in the range of the phase changed power threshold value limits, then the phase current
The change direction of power detected by mutual inductor is identical as discharge power/charge power change direction of setting, and the phase
The one third of discharge power/charge power changing value of the changing value and setting of power detected by current transformer has
There is consistency；If the changing value of power detected by a phase current mutual inductor and discharge power/charge power change of setting
The absolute value of the sum of the one third of change value is in the range of the phase changed power threshold value limits, then the phase current mutual inductor institute
The change direction of the power detected and discharge power/charge power of setting change in the opposite direction, and the phase current mutual inductance
The one third of discharge power/charge power changing value of the changing value and setting of power detected by device has consistent
Property.
5. three-phase energy-storage system ammeter current transformer connecting detection method according to claim 4, it is characterised in that: institute
State phase changed power threshold value is set as discharge power/charge power changing value of setting 4%.
6. three-phase energy-storage system ammeter current transformer connecting detection method according to claim 1, it is characterised in that:
When the three-phase energy storage system discharges, the discharge power to discharge every time is gradually incremented by according to preset discharge rate gradient；Described
When three-phase energy-storage system charges, the charge power to charge every time is gradually incremented by according to preset charge power gradient.
7. three-phase energy-storage system ammeter current transformer connecting detection method according to claim 1, it is characterised in that: M
It is 5, J value be 3, K value is 3 that value, which is 5, N value,.
8. three-phase energy-storage system ammeter current transformer connecting detection method according to claim 1, it is characterised in that: institute
It states three-phase energy-storage system and starts charged/discharged and by one section of delay and when stable discharging/charging, then read the ammeter detection
The general power arrived/phase power.
9. three-phase energy-storage system ammeter current transformer connecting detection method according to claim 8, it is characterised in that: institute
Stating delay is 10s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910205915.9A CN110045313B (en) | 2019-03-19 | 2019-03-19 | Three-phase energy storage system ammeter current transformer connection detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910205915.9A CN110045313B (en) | 2019-03-19 | 2019-03-19 | Three-phase energy storage system ammeter current transformer connection detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110045313A true CN110045313A (en) | 2019-07-23 |
| CN110045313B CN110045313B (en) | 2021-08-24 |
Family
ID=67274819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910205915.9A Active CN110045313B (en) | 2019-03-19 | 2019-03-19 | Three-phase energy storage system ammeter current transformer connection detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110045313B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110749771A (en) * | 2019-10-15 | 2020-02-04 | 宁波吉利汽车研究开发有限公司 | Current acquisition system, current acquisition device and electric automobile |
| CN112180313A (en) * | 2020-09-02 | 2021-01-05 | 深圳市首航新能源股份有限公司 | Automatic correction method and control device for current transformer and energy storage equipment |
| CN114200347A (en) * | 2021-11-30 | 2022-03-18 | 杭州煦达新能源科技有限公司 | Method for detecting abnormal connection of cell voltage sampling lines in energy storage system |
| CN115598581A (en) * | 2022-11-28 | 2023-01-13 | 江苏阿诗特能源科技有限公司（Cn） | Current transformer fault detection method, equipment and medium of energy storage system |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2081539U (en) * | 1990-10-26 | 1991-07-24 | 郑五星 | Automatic numeral type electric metering on-line detecting instrument |
| JP2012005193A (en) * | 2010-06-15 | 2012-01-05 | Fuji Electric Fa Components & Systems Co Ltd | Leakage cutoff unit and leakage detector |
| CN103163409A (en) * | 2011-12-19 | 2013-06-19 | 上海安科瑞电气股份有限公司 | Method and device used for correcting inverse current wiring of field electric instrument |
| CN104181435A (en) * | 2014-07-24 | 2014-12-03 | 苏州太谷电力股份有限公司 | Wiring error correcting method and device for three-phase four-wire energy-efficiency terminal |
| CN106569170A (en) * | 2016-11-09 | 2017-04-19 | 国网山东省电力公司临朐县供电公司 | Metering device secondary circuit detector and detection method thereof |
| CN107966630A (en) * | 2017-11-10 | 2018-04-27 | 江苏固德威电源科技股份有限公司 | Ammeter current transformer connecting detection method applied to energy-storage system |
| CN108009131A (en) * | 2017-11-30 | 2018-05-08 | 重庆电力高等专科学校 | User power utilization data exception analysis method based on power information collection |
| CN108445438A (en) * | 2018-03-23 | 2018-08-24 | 国网河北省电力有限公司电力科学研究院 | The detection method and device of false wiring of electric energy metering equipment |
| CN108462193A (en) * | 2018-02-08 | 2018-08-28 | 福州大学 | A kind of electric network coordination control method containing photovoltaic generation Yu electric vehicle charge and discharge |
| CN108646089A (en) * | 2018-06-14 | 2018-10-12 | 广东电网有限责任公司 | Electricity consumption computational methods, device and electronic equipment |
-
2019
- 2019-03-19 CN CN201910205915.9A patent/CN110045313B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2081539U (en) * | 1990-10-26 | 1991-07-24 | 郑五星 | Automatic numeral type electric metering on-line detecting instrument |
| JP2012005193A (en) * | 2010-06-15 | 2012-01-05 | Fuji Electric Fa Components & Systems Co Ltd | Leakage cutoff unit and leakage detector |
| CN103163409A (en) * | 2011-12-19 | 2013-06-19 | 上海安科瑞电气股份有限公司 | Method and device used for correcting inverse current wiring of field electric instrument |
| CN104181435A (en) * | 2014-07-24 | 2014-12-03 | 苏州太谷电力股份有限公司 | Wiring error correcting method and device for three-phase four-wire energy-efficiency terminal |
| CN106569170A (en) * | 2016-11-09 | 2017-04-19 | 国网山东省电力公司临朐县供电公司 | Metering device secondary circuit detector and detection method thereof |
| CN107966630A (en) * | 2017-11-10 | 2018-04-27 | 江苏固德威电源科技股份有限公司 | Ammeter current transformer connecting detection method applied to energy-storage system |
| CN108009131A (en) * | 2017-11-30 | 2018-05-08 | 重庆电力高等专科学校 | User power utilization data exception analysis method based on power information collection |
| CN108462193A (en) * | 2018-02-08 | 2018-08-28 | 福州大学 | A kind of electric network coordination control method containing photovoltaic generation Yu electric vehicle charge and discharge |
| CN108445438A (en) * | 2018-03-23 | 2018-08-24 | 国网河北省电力有限公司电力科学研究院 | The detection method and device of false wiring of electric energy metering equipment |
| CN108646089A (en) * | 2018-06-14 | 2018-10-12 | 广东电网有限责任公司 | Electricity consumption computational methods, device and electronic equipment |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110749771A (en) * | 2019-10-15 | 2020-02-04 | 宁波吉利汽车研究开发有限公司 | Current acquisition system, current acquisition device and electric automobile |
| CN112180313A (en) * | 2020-09-02 | 2021-01-05 | 深圳市首航新能源股份有限公司 | Automatic correction method and control device for current transformer and energy storage equipment |
| CN112180313B (en) * | 2020-09-02 | 2023-11-10 | 深圳市首航新能源股份有限公司 | Automatic correction method, control device and energy storage equipment for current transformer |
| CN114200347A (en) * | 2021-11-30 | 2022-03-18 | 杭州煦达新能源科技有限公司 | Method for detecting abnormal connection of cell voltage sampling lines in energy storage system |
| CN115598581A (en) * | 2022-11-28 | 2023-01-13 | 江苏阿诗特能源科技有限公司（Cn） | Current transformer fault detection method, equipment and medium of energy storage system |
| CN115598581B (en) * | 2022-11-28 | 2023-03-07 | 江苏阿诗特能源科技有限公司 | Current transformer fault detection method, equipment and medium of energy storage system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110045313B (en) | 2021-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110045313A (en) | Three-phase energy-storage system ammeter current transformer connecting detection method | |
| Chatzakis et al. | Designing a new generalized battery management system | |
| CN103390254B (en) | A kind of low-voltage platform area line loss Integrated Assessment On The Level method | |
| CN105158699A (en) | Battery health state detection method and apparatus | |
| CN108432083A (en) | Method, system and equipment for balancing individual electrical energy storage unit | |
| CN102067408A (en) | Power control system for distributing power to power demanding facilities | |
| CN105449806B (en) | The charging system of electric vehicle | |
| CN106451592A (en) | Battery charging and discharging control method, battery charging and discharging control device and electric car | |
| CN107966630B (en) | Ammeter current transformer connection detection method applied to energy storage system | |
| CN103217651A (en) | Method and system for estimating charge state of storage battery | |
| CN208369205U (en) | Busbar voltage detection and protective module, Switching Power Supply control unit and switching power circuit | |
| CN104764975A (en) | Earth leakage detection device | |
| CN109507630A (en) | Wiring judgment method and system | |
| CN112462318A (en) | Ammeter wiring detection method, distributed power generation system and power generation source | |
| CN105119510A (en) | Hybrid cascade multi-level transverter capacitance-voltage balance method and system | |
| CN107820467A (en) | A kind of Vehicular charger and on-board charging system | |
| CN106033894B (en) | Method for judging stability of extra-high voltage direct current multi-drop point power grid | |
| CN109116227A (en) | A kind of the main relay detection circuit and detection method of battery management system | |
| CN108599210A (en) | A kind of echelon battery energy storage system and method for household photovoltaic power grid | |
| CN107196379A (en) | A kind of portable energy-storing power supply and its rental method | |
| CN104993466B (en) | Cascading fault fast dynamic simulation method applicable to alternating current-direct current power grid | |
| CN2916642Y (en) | AC line voltage measuring system for switch-type fly-back power supply | |
| CN108107313A (en) | The method that unloaded situation judges connection box of electric energy meter correctness | |
| CN103913665B (en) | Method and apparatus for detecting short circuit | |
| CN209296878U (en) | A kind of main relay detection circuit of battery management system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 215000 No. 90, Zijin Road, high tech Zone, Suzhou, Jiangsu Patentee after: Goodway Technology Co.,Ltd. Patentee after: Goodway Power Technology (Guangde) Co., Ltd Address before: 215163 No.189 Kunlunshan Road, high tech Zone, Suzhou City, Jiangsu Province Patentee before: JIANGSU GOODWE POWER SUPPLY TECHNOLOGY Co.,Ltd. Patentee before: Goodway Power Technology (Guangde) Co., Ltd |