CN103884950B - The current leakage detection system of a kind of energy-accumulating power station and electrical leakage detecting method - Google Patents
The current leakage detection system of a kind of energy-accumulating power station and electrical leakage detecting method Download PDFInfo
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- CN103884950B CN103884950B CN201210560762.8A CN201210560762A CN103884950B CN 103884950 B CN103884950 B CN 103884950B CN 201210560762 A CN201210560762 A CN 201210560762A CN 103884950 B CN103884950 B CN 103884950B
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Abstract
The invention discloses electrical leakage detecting method and the current leakage detection system of a kind of energy-accumulating power station.This detection method comprises the following steps: arrange state detection module, by the chopper on the loop of power circuit of state detection module detection energy-accumulating power station or the state that is opened or closed of catalyst the processing module feeding back to energy-accumulating power station；Breaker control module is set, disconnects at least one chopper on loop of power circuit for the instruction according to processing module；Wherein, processing module is gathered before breaker control module performs instruction by high pressure detection module and performs the negative pole voltage-to-ground of battery pile and the situation of change of positive pole voltage-to-ground of energy-accumulating power station after instruction, and judge whether energy-accumulating power station produces electric leakage according to the situation of change of negative pole voltage-to-ground and positive pole voltage-to-ground, by the way, the present invention can detect whether energy-accumulating power station exists electric leakage exactly, thus prevents erroneous judgement.
Description
Technical field
The present invention relates to energy-accumulating power station technical field, particularly relate to the electric leakage inspection of a kind of energy-accumulating power station
Examining system and electrical leakage detecting method.
Background technology
Refer to the schematic diagram of current leakage detection system that Fig. 1, Fig. 1 are the energy-accumulating power stations of prior art,
As it is shown in figure 1, the current leakage detection system 10 of prior art include battery pile 11, chopper 12,
Power converter (power converter system, PCS) 13, high pressure detection module 14 and
Processing module 15.Wherein, high pressure detection module 14 detect battery pile 11 positive pole voltage-to-ground and
Negative pole voltage-to-ground, processing module 15 judges that the positive pole that high pressure detection module 14 detects is the most electric
Whether pressure is equal to negative pole voltage-to-ground, and when the result judged is no, processing module 15 judges storage
Can there is electric leakage in power station, when the result judged is as being, processing module 15 judges that energy-accumulating power station is not
There is electric leakage.
But, the detection of the current leakage detection system 10 of prior art has some limitations, its
Do not account for the distribution of other impedances on whole loop of power circuit.Such as, when the chopper in Fig. 1
After 12 disconnect, the 100K resistance 16 of PCS 13 side of loop of power circuit will make battery pile 11
Positive pole voltage-to-ground and negative pole voltage-to-ground unequal, now, processing module 15 passes through high pressure
Detection module 14 detects that positive pole voltage-to-ground and negative pole voltage-to-ground are unequal, will be judged as
There is electric leakage in energy-accumulating power station, thus causes erroneous judgement.
Furthermore, when positive pole and the negative pole of battery pile 11 all access identical impedance, such as, have impedance
When 2 identical people contact positive pole and negative pole, the positive pole voltage-to-ground of battery pile 11 and negative pole are over the ground
Voltage still remains equal, and herein, processing module 15 can be judged as that energy-accumulating power station does not exist electric leakage,
Thus cause erroneous judgement.
Summary of the invention
The technical problem that present invention mainly solves is to provide the current leakage detection system of a kind of energy-accumulating power station
And electrical leakage detecting method, it is possible to whether detection energy-accumulating power station exists electric leakage exactly, thus prevents by mistake
Sentence.
For solving above-mentioned technical problem, the technical scheme that the present invention uses is: provide one storage
The electrical leakage detecting method in energy power station, this detection method comprises the following steps: arrange state detection module,
Disconnected by the chopper on the loop of power circuit of state detection module detection energy-accumulating power station or catalyst
Open or closure state feed back to the processing module of energy-accumulating power station；Breaker control module is set, uses
At least one chopper on loop of power circuit is disconnected in the instruction according to processing module；Wherein, process
After module is gathered before breaker control module performs instruction by high pressure detection module and is performed instruction
The negative pole voltage-to-ground of the battery pile of energy-accumulating power station and the situation of change of positive pole voltage-to-ground, and according to
The situation of change of negative pole voltage-to-ground and positive pole voltage-to-ground judges whether energy-accumulating power station exists electric leakage.
Wherein, when state detection module detects at least one disconnection of catalyst or chopper,
Processing module sends instruction, controls breaking of the PCS side in breaker control module disconnection loop of power circuit
Road device；High pressure detection module gathers now negative pole voltage-to-ground and positive pole voltage-to-ground；When negative pole pair
Ground voltage and positive pole voltage-to-ground are equal, and when being the half of voltage between negative pole and positive pole, process
Module judges the most to there is not electric leakage.
Wherein, when state detection module detects that catalyst and chopper all close, and high pressure inspection
It is the most electric that survey module collects negative pole voltage-to-ground and positive pole before breaker control module performs to instruct
Press by unequal change to equal time, processing module sends instruction, controls breaker control module and first breaks
Open the chopper of PCS side in loop of power circuit, then disconnect the chopper of negative side.
Wherein, when state detection module detects that catalyst and chopper all close, and high pressure inspection
It is the most electric that survey module collects negative pole voltage-to-ground and positive pole before breaker control module performs to instruct
Press by unequal change to equal time, processing module sends instruction, controls breaker control module and first breaks
Open the PCS side in loop of power circuit the chopper being connected with negative electricity and the chopper of side of the positive electrode,
Disconnect the chopper of negative side again.
Wherein, when state detection module detects that catalyst and chopper all close, and high pressure inspection
It is the most electric that survey module collects negative pole voltage-to-ground and positive pole before breaker control module performs to instruct
Press by unequal change to equal time, processing module sends instruction, controls breaker control module and first breaks
Open the PCS side in the chopper of negative side and loop of power circuit the chopper being connected with positive electrical,
Disconnect the chopper of side of the positive electrode again.
Wherein, when state detection module detects that catalyst and chopper all close, and high pressure inspection
It is the most electric that survey module collects negative pole voltage-to-ground and positive pole before breaker control module performs to instruct
Press by unequal change to equal time, processing module sends instruction, controls breaker control module and first breaks
Open the chopper of PCS side, then disconnect the chopper of side of the positive electrode.
Wherein, negative pole voltage-to-ground and positive pole pair when high pressure detection module gathers twice cut-off breaker
Ground voltage；When first time cut-off breaker, negative pole voltage-to-ground and positive pole voltage-to-ground are unequal,
When second time cut-off breaker, when negative pole voltage-to-ground and positive pole voltage-to-ground are equal, process mould
Block judges now to there is electric leakage.
For solving above-mentioned technical problem, another technical solution used in the present invention is: provide one
The current leakage detection system of energy-accumulating power station, this current leakage detection system includes battery pile, catalyst, open circuit
Device, testing circuit and PCS, testing circuit include high pressure detection module, state detection module,
Breaker control module and processing module, wherein: state detection module is used for detecting energy-accumulating power station
Loop of power circuit on chopper or the state that is opened or closed of catalyst feed back to processing module；
Breaker control module disconnects at least one on loop of power circuit for the instruction according to processing module
Chopper；Wherein, high pressure detection module gathers and refers to execution before breaker control module performs instruction
The negative pole voltage-to-ground of battery pile and the situation of change of positive pole voltage-to-ground after order, processing module according to
The situation of change of negative pole voltage-to-ground and positive pole voltage-to-ground judges whether energy-accumulating power station exists electric leakage.
Wherein, when state detection module detects at least one disconnection of catalyst or chopper,
Processing module sends instruction, controls breaker control module and disconnects the chopper of PCS side；High pressure is examined
Survey module and gather now negative pole voltage-to-ground and positive pole voltage-to-ground；When negative pole voltage-to-ground and positive pole
Voltage-to-ground is equal, and when being the half of voltage between negative pole and positive pole, processing module judges now
There is not electric leakage.
Wherein, when state detection module is not detected by catalyst and chopper disconnection, and high pressure inspection
It is the most electric that survey module collects negative pole voltage-to-ground and positive pole before breaker control module performs to instruct
Press by unequal change to equal time, processing module sends instruction, controls breaker control module and first breaks
Open the chopper of PCS side, then disconnect the chopper of negative side；High pressure detection module gathers twice and breaks
Negative pole voltage-to-ground and positive pole voltage-to-ground during circuit breaker；When first time cut-off breaker, negative
Pole voltage-to-ground and positive pole voltage-to-ground are unequal, and when second time cut-off breaker, pole is the most electric
Pressure and positive pole voltage-to-ground are equal, and processor module judges now to there is electric leakage.
The invention has the beneficial effects as follows: be different from the situation of prior art, the present invention is provided with state
Detection module and breaker control module, wherein, the power of state detection module detection energy-accumulating power station
Chopper on loop or the state that is opened or closed of catalyst also feed back to the process of energy-accumulating power station
Module, breaker control module disconnects at least one on loop of power circuit according to the instruction of processing module
Chopper, processing module by high pressure detection module gather breaker control module perform instruction before and
Perform the negative pole voltage-to-ground of battery pile and the change of positive pole voltage-to-ground of energy-accumulating power station after instruction
Situation, and judge that energy-accumulating power station is according to the situation of change of negative pole voltage-to-ground and positive pole voltage-to-ground
No existence leaks electricity.The present invention is by battery pile negative before detection cut-off breaker and after cut-off breaker
The situation of change of pole voltage-to-ground and positive pole voltage-to-ground judges whether energy-accumulating power station exists electric leakage,
Can detect whether energy-accumulating power station exists electric leakage exactly, thus prevent erroneous judgement.
Accompanying drawing explanation
Fig. 1 is the principle schematic of the current leakage detection system of prior art energy-accumulating power station；
Fig. 2 is the principle schematic of the current leakage detection system of the energy-accumulating power station of first embodiment of the invention；
Fig. 3 is the flow chart of the electrical leakage detecting method of the energy-accumulating power station of second embodiment of the invention；
Fig. 4 is the flow chart of the electrical leakage detecting method of the energy-accumulating power station of third embodiment of the invention；
Fig. 5 is the flow chart of the electrical leakage detecting method of the energy-accumulating power station of fourth embodiment of the invention；
Fig. 6 is the flow chart of the electrical leakage detecting method of the energy-accumulating power station of fifth embodiment of the invention；
Fig. 7 is the flow chart of the electrical leakage detecting method of the energy-accumulating power station of sixth embodiment of the invention.
Detailed description of the invention
Refer to the current leakage detection system that Fig. 2, Fig. 2 are the energy-accumulating power stations of first embodiment of the invention
Principle schematic.As in figure 2 it is shown, the current leakage detection system 20 of the present invention include battery pile 21,
Chopper 22, catalyst 23, testing circuit 24 and power converter (PCS) 25.
Wherein, battery pile 21 includes positive pole 211 and negative pole 212.Chopper 22 is multiple, its
It is separately positioned on positive pole 211 side, negative pole 212 side and PCS 25 side.Such as shown in Fig. 1
Chopper 221 and 222 electrically connects with positive pole 211 successively, and chopper 221 is arranged on positive pole
211 sides, chopper 222 is arranged on PCS 25 side；Chopper 223 and 224 successively with negative pole
212 electrically connect, and chopper 223 is arranged on negative pole 212 side, and chopper 224 is arranged on PCS
25 sides.At least one, catalyst 23, it is preferably provided between positive pole 211 and PCS 25,
As the catalyst 231 of Fig. 1 is arranged on positive pole 211 side, catalyst 232 is arranged on PCS 25 side.
Testing circuit 24 includes high pressure detection module 241 and 242, state detection module 243, chopper
Control module 244 and processing module 245.
In the present embodiment, state detection module 243 is for detecting the loop of power circuit 26 of energy-accumulating power station
On chopper 22 or the state that is opened or closed of catalyst 23 feed back to processing module 245.
Breaker control module 244 disconnects loop of power circuit 260 for the instruction according to processing module 245
At least one chopper 22.Wherein, high pressure detection module 241 gathers breaker control module
The situation of change of negative pole 212 voltage-to-ground after instructing with execution before 244 execution instructions, high pressure detects
After module 242 gathers before breaker control module 244 performs instruction and performs instruction, positive pole 211 is right
The situation of change of ground voltage.Processing module 245 is right according to negative pole 212 voltage-to-ground and positive pole 211
The situation of change of ground voltage judges whether energy-accumulating power station exists electric leakage.
Wherein, the present embodiment is the equilibrium-like by the electric bridge 27 arranged on detection loop of power circuit 26
State detects whether energy-accumulating power station exists electric leakage.Specifically, electric bridge 27 is by four resistance phases
Deng resistance 271,272,273 and 274 composition, wherein, resistance 271 is arranged on negative pole 212
Side, resistance 272 is arranged on positive pole 211 side.High pressure detection module 241 gathers resistance 271 two ends
Voltage, to obtain negative pole 212 voltage-to-ground, high pressure detection module 242 gathers resistance 272 liang
The voltage of end, to obtain positive pole 211 voltage-to-ground.Add deduct when detection loop of power circuit 26 increases
During few impedance, electric bridge 27 can be caused uneven, now negative pole 212 voltage-to-ground is not equal to positive pole
211 voltage-to-grounds；When detection loop of power circuit 26 does not increases and reduces impedance, at electric bridge 27
When poised state, now negative pole 212 voltage-to-ground is equal to positive pole 211 voltage-to-ground, and is just
The half of voltage between pole 211 and negative pole 212.
In the present embodiment, when negative pole 212 voltage-to-ground that high pressure detection module 241 collects
When positive pole 211 voltage-to-ground that high pressure detection module 242 collects, processor 245 sends finger
Order, controlled state detection module 243 detects the chopper 22 on the loop of power circuit 26 of energy-accumulating power station
Or catalyst 23 be opened or closed state.If state detection module 243 detects catalyst
22 or chopper 23 at least one disconnect, such as when the catalyst 232 in the present embodiment disconnects,
Testing result is fed back to processing module 245 by state detection module 243.
Processing module 245 sends instruction, controls breaker control module 244 cut-off breaker 222
With 224.
High pressure detection module 241 gathers now negative pole 212 voltage-to-ground, high pressure detection module again
242 gather now positive pole 211 voltage-to-ground again.
When now, negative pole 212 voltage-to-ground and positive pole 211 voltage-to-ground are equal, and are negative pole 212
With between positive pole 211 during the half of voltage, processing module 245 judges not exist electric leakage.When
When negative pole 212 voltage-to-ground is still not equal to positive pole 211 voltage-to-ground, processing module 245 judges
Now there is electric leakage.
In the present embodiment, negative pole 212 voltage-to-ground collected when high pressure detection module 241 and height
Pressure positive pole 211 voltage-to-ground that collects of detection module 242 by unequal change to equal time, process
Device 245 sends instruction, and controlled state detection module 243 detects the loop of power circuit 26 of energy-accumulating power station
On chopper 22 or catalyst 23 be opened or closed state.If now state detection module
243 detect that catalyst 23 and chopper 22 all close.Then processing module 245 judges now have
It is probably two identical objects of impedance successively to contact on loop of power circuit 26, such as same impedance
First and second liang of people contact negative pole 212 respectively to the circuit between PCS 25 and positive pole 211 to PCS
Circuit between 25.Therefore, processing module 245 sends instruction, controls breaker control module
244 by certain tactful cut-off breaker 22.Specific strategy has the most several:
The first: first cut-off breaker 222 and 224, then cut-off breaker 223；
The second: first cut-off breaker 221 and 224, then cut-off breaker 223；
The third: first cut-off breaker 222 and 223, then cut-off breaker 221；
4th kind: first cut-off breaker 222 and 224, then cut-off breaker 221.
Wherein, the first strategy allows for the circuit between first people's contact breaker 223 and 224,
Circuit between second people's contact breaker 222 and PCS 25.The second and the third strategy are to examine
Consider the circuit between first people's contact breaker 223 and 224, second people's contact breaker 221 and 222
Between circuit.4th kind of strategy allows between first people's contact breaker 224 and PCS 25
Circuit, the circuit between second people's contact breaker 221 and 222.
In the first strategy, cut-off breaker 222 and 224 for the first time, it is therefore an objective to second people is got rid of
Outside loop of power circuit 26, high pressure detection module 241 gathers now negative pole 212 voltage-to-ground, high
Pressure detection module 242 gathers now positive pole voltage-to-ground.Cut-off breaker 223 for the second time, purpose
Being that first people is rejected to outside loop of power circuit 26, high pressure detection module 241 gathers now negative pole 212
Voltage-to-ground, high pressure detection module 242 gathers now positive pole 211 voltage-to-ground.
In the first strategy, during if off chopper 222 and 224, negative pole 212 is the most electric
Pressure and positive pole 211 voltage-to-ground are unequal；During cut-off breaker 223, negative pole 212 voltage-to-ground
Equal with positive pole 211 voltage-to-ground, then processing module 244 judges that now energy-accumulating power station exists electric leakage.
On the contrary, during if off chopper 222 and 224, negative pole 212 voltage-to-ground and positive pole 211 are right
Ground voltage is equal, and during cut-off breaker 223, negative pole 212 voltage-to-ground and positive pole 211 are the most electric
Press unequal, then processing module 244 judges that now energy-accumulating power station does not exist electric leakage.
In the present embodiment, second, third and the 4th in strategy judgement principle all with the first plan
Judgement principle slightly is identical, i.e. for the first time during cut-off breaker 22, it is therefore an objective to a wherein people row
Remove out in loop of power circuit 26, for the second time during cut-off breaker 22, it is therefore an objective to another people is excluded
In loop of power circuit 26.Wherein, the judgment principle after twice cut-off breaker 22 is the most identical, at this
Repeat no more.
Refer to the electrical leakage detecting method that Fig. 3, Fig. 3 are the energy-accumulating power stations of second embodiment of the invention
Flow chart.As it is shown on figure 3, the electrical leakage detecting method of the present invention comprises the following steps:
Step S31: collect negative pole voltage-to-ground and positive pole voltage-to-ground is unequal；
Step S32: state detection module detection chopper or catalyst be opened or closed state；
In step s 32, when chopper being detected and catalyst all closes, return to step S32,
Continue detection chopper or catalyst be opened or closed state, when chopper or catalyst being detected
One of them disconnect time, jump to step S33.
Step S33: processing module sends instruction, controls breaker control module and disconnects loop of power circuit
In the chopper of PCS side；
In step S33, i.e. disconnect the chopper 222 and 224 shown in Fig. 2, it is therefore an objective to PCS
The resistance of side excludes outside loop of power circuit, to prevent the Resistance Influence testing result of PCS side.
Step S34: gather negative pole voltage-to-ground and positive pole voltage-to-ground；
In step S34, now negative pole voltage-to-ground and positive pole voltage-to-ground have eliminated PCS side
The impact of resistance.
Step S35: judge that whether negative pole voltage-to-ground is equal to positive pole voltage-to-ground；
In step s 35, when the result judged is as being, jump to step S36, when judge
When result is no, jump to step S37.
Step S36: processing module judges to there is not electric leakage；
In step S36, processing module jumps to step S32 after judging to there is not electric leakage, continues
Detection chopper or catalyst be opened or closed state.
Step S37: processing module judges to there is electric leakage；
In step S36, after processing module judges to there is electric leakage, disconnect the confession of battery pile further
Electricity, then overhauls.
Refer to the electrical leakage detecting method that Fig. 4, Fig. 4 are the energy-accumulating power stations of third embodiment of the invention
Flow chart.As shown in Figure 4, the electrical leakage detecting method of the present invention comprises the following steps:
Step S40: collect negative pole voltage-to-ground and positive pole voltage-to-ground by equal change to unequal；
Step S41: state detection module detection chopper or catalyst be opened or closed state；
In step S41, when one of them disconnection of chopper or catalyst being detected, return
To step S41, that continues detection chopper or catalyst is opened or closed state；Disconnected when detecting
When road device and catalyst all close, then processing module judges that to be now likely to be two impedances identical
Such as first and second liang people of object successively contact is on loop of power circuit, and such as first and second liang people contact respectively at figure
Negative pole 212 shown in 2 arrives the circuit between PCS 25 and positive pole 211 arrives between PCS 25
Circuit.In view of above-mentioned judgement, processing module must send out instruction and detects, and therefore, jumps to
Step S42.
Step S42: processing module sends instruction, controls breaker control module and disconnects loop of power circuit
In the chopper of PCS side；
In step S42, allow for first people contact chopper 223 and 224 as shown in Figure 2
Between circuit, the circuit between second people contact chopper 222 and PCS 25 as shown in Figure 2.
The chopper disconnecting the PCS side in loop of power circuit i.e. disconnects chopper 222 He as shown in Figure 2
224, it is therefore an objective to second people is rejected to outside loop of power circuit 26.
Step S43: gather negative pole voltage-to-ground and positive pole voltage-to-ground；
Step S44: judge that whether negative pole voltage-to-ground is equal to positive pole voltage-to-ground；
In step S44, when the result judged is as being, jump to step S45, when judge
When result is no, jump to step S46.
Step S45: processing module judges to there is not electric leakage；
In step S45, when determining energy-accumulating power station and there is not electric leakage, jump to step S41,
Continue detection chopper or catalyst be opened or closed state.
Step S46: processing module sends instruction, controls breaker control module and disconnects negative side
Chopper；
In step S46, breaker control module disconnects the chopper of negative side and i.e. disconnects Fig. 2 institute
The chopper 223 shown, it is therefore an objective to first people is rejected to outside loop of power circuit 26.
Step S47: gather negative pole voltage-to-ground and positive pole voltage-to-ground；
Step S48: judge that whether negative pole voltage-to-ground is equal to positive pole voltage-to-ground；
In step S48, when the result judged is no, jump to step S45, when judge
When result is for being, jump to step S49
Step S49: processing module judges to there is electric leakage；
In step S49, after processing module judges that energy-accumulating power station exists electric leakage, disconnect electricity further
The power supply of Chi Dui, then overhauls.
Refer to the electrical leakage detecting method that Fig. 5, Fig. 5 are the energy-accumulating power stations of fourth embodiment of the invention
Flow chart.As it is shown in figure 5, the electrical leakage detecting method of the present invention comprises the following steps:
Step S50: collect negative pole voltage-to-ground and positive pole voltage-to-ground by equal change to unequal；
Step S51: state detection module detection chopper or catalyst be opened or closed state；
In step s 51, when one of them disconnection of chopper or catalyst being detected, return
To step S51, that continues detection chopper or catalyst is opened or closed state；Disconnected when detecting
When road device and catalyst all close, then processing module judges that to be now likely to be two impedances identical
Such as first and second liang people of object successively contact is on loop of power circuit, and such as first and second liang people contact respectively at figure
Negative pole 212 shown in 2 arrives the circuit between PCS 25 and positive pole 211 arrives between PCS 25
Circuit.In view of above-mentioned judgement, processing module must send out instruction and detects, and therefore, jumps to
Step S52.
Step S52: processing module sends instruction, controls breaker control module and disconnects loop of power circuit
In PCS side and the chopper being connected with negative electricity and the chopper of side of the positive electrode；
In step S52, allow for first people contact chopper 223 and 224 as shown in Figure 2
Between circuit, the circuit between second people contact chopper 221 and 222 as shown in Figure 2.Disconnected
Open the PCS side in loop of power circuit the chopper being connected with negative electricity and the chopper of side of the positive electrode
I.e. disconnect chopper 221 and 224 as shown in Figure 2, it is therefore an objective to second people is rejected to loop of power circuit
Outside 26.
Step S53: gather negative pole voltage-to-ground and positive pole voltage-to-ground；
Step S54: judge that whether negative pole voltage-to-ground is equal to positive pole voltage-to-ground；
In step S54, when the result judged is as being, jump to step S55, when judge
When result is no, jump to step S56.
Step S55: processing module judges to there is not electric leakage；
In step S55, when determining energy-accumulating power station and there is not electric leakage, jump to step S51,
Continue detection chopper or catalyst be opened or closed state.
Step S56: processing module sends instruction, controls breaker control module and disconnects negative side
Chopper；
In step S56, breaker control module disconnects the chopper of negative side and i.e. disconnects Fig. 2 institute
The chopper 223 shown, it is therefore an objective to first people is rejected to outside loop of power circuit 26.
Step S57: gather negative pole voltage-to-ground and positive pole voltage-to-ground；
Step S58: judge that whether negative pole voltage-to-ground is equal to positive pole voltage-to-ground；
In step S58, when the result judged is no, jump to step S55, when judge
When result is for being, jump to step S59
Step S59: processing module judges to there is electric leakage；
In step S59, after processing module judges that energy-accumulating power station exists electric leakage, disconnect electricity further
The power supply of Chi Dui, then overhauls.
Refer to the electrical leakage detecting method that Fig. 6, Fig. 6 are the energy-accumulating power stations of fifth embodiment of the invention
Flow chart.As shown in Figure 6, the electrical leakage detecting method of the present invention comprises the following steps:
Step S60: collect negative pole voltage-to-ground and positive pole voltage-to-ground by equal change to unequal；
Step S61: state detection module detection chopper or catalyst be opened or closed state；
In step S61, when one of them disconnection of chopper or catalyst being detected, return
To step S61, that continues detection chopper or catalyst is opened or closed state, disconnected when detecting
When road device and catalyst all close, then processing module judges that to be now likely to be two impedances identical
Such as first and second liang people of object successively contact is on loop of power circuit, and such as first and second liang people contact respectively at figure
Negative pole 212 shown in 2 arrives the circuit between PCS 25 and positive pole 211 arrives between PCS 25
Circuit.In view of above-mentioned judgement, processing module must send out instruction and detects, and therefore, jumps to
Step S62.
Step S62: processing module sends instruction, controls breaker control module and disconnects negative side
PCS side in chopper and loop of power circuit the chopper being connected with positive electrical；
In step S62, allow for first people contact chopper 223 and 224 as shown in Figure 2
Between circuit, the circuit between second people contact chopper 221 and 222 as shown in Figure 2.Disconnected
Open the PCS side in the chopper of negative side and loop of power circuit the chopper being connected with positive electrical
I.e. disconnect chopper 222 and 223 as shown in Figure 2, it is therefore an objective to first people is rejected to loop of power circuit
Outside 26.
Step S63: gather negative pole voltage-to-ground and positive pole voltage-to-ground；
Step S64: judge that whether negative pole voltage-to-ground is equal to positive pole voltage-to-ground；
In step S64, when the result judged is as being, jump to step S65, when judge
When result is no, jump to step S66.
Step S65: processing module judges to there is not electric leakage；
In step S65, when determining energy-accumulating power station and there is not electric leakage, jump to step S61,
Continue detection chopper or catalyst be opened or closed state.
Step S66: processing module sends instruction, controls breaker control module and disconnects side of the positive electrode
Chopper;
In step S66, breaker control module disconnects the chopper of side of the positive electrode and i.e. disconnects Fig. 2 institute
The chopper 221 shown, it is therefore an objective to second people is rejected to outside loop of power circuit 26.
Step S67: gather negative pole voltage-to-ground and positive pole voltage-to-ground；
Step S68: judge that whether negative pole voltage-to-ground is equal to positive pole voltage-to-ground；
In step S68, when the result judged is no, jump to step S65, when judge
When result is for being, jump to step S69
Step S69: processing module judges to there is electric leakage；
In step S69, after processing module judges that energy-accumulating power station exists electric leakage, disconnect electricity further
The power supply of Chi Dui, then overhauls.
Refer to the electrical leakage detecting method that Fig. 7, Fig. 7 are the energy-accumulating power stations of sixth embodiment of the invention
Flow chart.As it is shown in fig. 7, the electrical leakage detecting method of the present invention comprises the following steps:
Step S70: collect negative pole voltage-to-ground and positive pole voltage-to-ground by equal change to unequal；
Step S71: state detection module detection chopper or catalyst be opened or closed state；
In step S71, when one of them disconnection of chopper or catalyst being detected, return
To step S71, that continues detection chopper or catalyst is opened or closed state, disconnected when detecting
When road device and catalyst all close, then processing module judges that to be now likely to be two impedances identical
Such as first and second liang people of object successively contact is on loop of power circuit, and such as first and second liang people contact respectively at figure
Negative pole 212 shown in 2 arrives the circuit between PCS 25 and positive pole 211 arrives between PCS 25
Circuit.In view of above-mentioned judgement, processing module must send out instruction and detects, and therefore, jumps to
Step S72.
Step S72: processing module sends instruction, controls breaker control module and disconnects PCS side
Chopper；
In step S72, allow for first people contact chopper 224 and PCS as shown in Figure 2
Circuit between 25, the circuit between second people contact chopper 221 and 222 as shown in Figure 2.
The chopper disconnecting PCS side i.e. disconnects chopper 222 and 224 as shown in Figure 2, it is therefore an objective to
First people is rejected to outside loop of power circuit 26.
Step S73: gather negative pole voltage-to-ground and positive pole voltage-to-ground；
Step S74: judge that whether negative pole voltage-to-ground is equal to positive pole voltage-to-ground；
In step S74, when the result judged is as being, jump to step S75, when judge
When result is no, jump to step S76.
Step S75: processing module judges to there is not electric leakage；
In step S75, when determining energy-accumulating power station and there is not electric leakage, jump to step S71,
Continue detection chopper or catalyst be opened or closed state.
Step S76: processing module sends instruction, controls breaker control module and disconnects side of the positive electrode
Chopper；
In step S76, breaker control module disconnects the chopper of side of the positive electrode and i.e. disconnects Fig. 2 institute
The chopper 221 shown, it is therefore an objective to second people is rejected to outside loop of power circuit 26.
Step S77: gather negative pole voltage-to-ground and positive pole voltage-to-ground；
Step S78: judge that whether negative pole voltage-to-ground is equal to positive pole voltage-to-ground；
In step S78, when the result judged is no, jump to step S75, when judge
When result is for being, jump to step S79
Step S79: processing module judges to there is electric leakage；
In step S79, after processing module judges that energy-accumulating power station exists electric leakage, disconnect electricity further
The power supply of Chi Dui, then overhauls.
In sum, on the present invention loop of power circuit by state detection module detection energy-accumulating power station
Chopper or the state that is opened or closed of catalyst also feed back to the processing module of energy-accumulating power station, process
Module sends instruction according to the situation that state detection module detects, controls breaker control module and breaks
Opening at least one chopper on loop of power circuit, processing module is adopted by high pressure detection module further
The negative pole of the battery pile of energy-accumulating power station after instructing with execution before collecting the execution instruction of breaker control module
Voltage-to-ground and the situation of change of positive pole voltage-to-ground, and according to negative pole voltage-to-ground and positive pole over the ground
The situation of change of voltage judges whether energy-accumulating power station exists electric leakage.The present invention disconnects open circuit by detection
The negative pole voltage-to-ground of battery pile and the change feelings of positive pole voltage-to-ground before device and after cut-off breaker
Condition judges whether energy-accumulating power station exists electric leakage, it is possible to whether detection energy-accumulating power station exists leakage exactly
Electricity, thus prevent erroneous judgement.
The foregoing is only embodiments of the present invention, not thereby limit the scope of the claims of the present invention,
Every equivalent structure utilizing description of the invention and accompanying drawing content to be made or equivalence flow process conversion, or
Directly or indirectly being used in other relevant technical fields, the patent being the most in like manner included in the present invention is protected
In the range of protecting.
Claims (10)
1. the electrical leakage detecting method of an energy-accumulating power station, it is characterised in that described detection method includes
Following steps:
State detection module is set, is detected the merit of described energy-accumulating power station by described state detection module
The state that is opened or closed of the chopper on rate loop also feeds back to the process mould of described energy-accumulating power station
Block；
Breaker control module is set, disconnects described power for the instruction according to described processing module
The described chopper of at least one on loop；
Wherein, described processing module gathers described breaker control mould respectively by high pressure detection module
Block perform before described instruction and perform described instruction after the negative pole pair of battery pile of described energy-accumulating power station
Ground voltage and the most equal situation of positive pole voltage-to-ground, and judge described energy storage according to described situation
Whether power station exists electric leakage, and wherein, described instruction is that described processing module is when described state-detection mould
Block sends when at least one disconnection of described chopper being detected.
Electrical leakage detecting method the most according to claim 1, it is characterised in that described chopper
For multiple, it is separately positioned on side of the positive electrode, negative side and PCS side；
Wherein, described chopper includes first, second, third and the 4th chopper, and first breaks
Road device and the second chopper are connected with positive electrical successively, and the first chopper is arranged on side of the positive electrode,
Second chopper is arranged on PCS side, and the 3rd chopper and the 4th chopper are electrically connected with negative pole successively
Connecing, and the 3rd chopper is arranged on negative side, the 4th chopper is arranged on PCS side；
When described state detection module detects at least one disconnection of described chopper, described place
Reason module sends instruction, controls described breaker control module and disconnects the PCS in described loop of power circuit
The chopper of side；
Described high pressure detection module gathers the most described negative pole voltage-to-ground and described positive pole is the most electric
Pressure；
When described negative pole voltage-to-ground and described positive pole voltage-to-ground are equal, and for described negative pole and institute
When stating the half of voltage between positive pole, described processing module judges the most to there is not electric leakage.
Electrical leakage detecting method the most according to claim 1, it is characterised in that described chopper
For multiple, it is separately positioned on side of the positive electrode, negative side and PCS side；
Wherein, described chopper includes first, second, third and the 4th chopper, and first breaks
Road device and the second chopper are connected with positive electrical successively, and the first chopper is arranged on side of the positive electrode,
Second chopper is arranged on PCS side, and the 3rd chopper and the 4th chopper are electrically connected with negative pole successively
Connecing, and the 3rd chopper is arranged on negative side, the 4th chopper is arranged on PCS side；
When described state detection module detects that described chopper all closes, and the detection of described high pressure
Module collect described breaker control module perform before described instruction described negative pole voltage-to-ground and
Described positive pole voltage-to-ground by unequal change to equal time, described processing module sends instruction, control
Described breaker control module first disconnects the chopper of the PCS side in described loop of power circuit, then disconnects
The chopper of described negative side.
Electrical leakage detecting method the most according to claim 1, it is characterised in that described chopper
For multiple, it is separately positioned on side of the positive electrode, negative side and PCS side；
Wherein, described chopper includes first, second, third and the 4th chopper, and first breaks
Road device and the second chopper are connected with positive electrical successively, and the first chopper is arranged on side of the positive electrode,
Second chopper is arranged on PCS side, and the 3rd chopper and the 4th chopper are electrically connected with negative pole successively
Connecing, and the 3rd chopper is arranged on negative side, the 4th chopper is arranged on PCS side；
When described state detection module detects that described chopper all closes, and the detection of described high pressure
Module collect described breaker control module perform before described instruction described negative pole voltage-to-ground and
Described positive pole voltage-to-ground by unequal change to equal time, described processing module sends instruction, control
Described breaker control module first disconnect the PCS side in described loop of power circuit and with described negative electricity
The chopper connected and the chopper of described side of the positive electrode, then disconnect the chopper of described negative side.
Electrical leakage detecting method the most according to claim 1, it is characterised in that described chopper
For multiple, it is separately positioned on side of the positive electrode, negative side and PCS side；
Wherein, described chopper includes first, second, third and the 4th chopper, and first breaks
Road device and the second chopper are connected with positive electrical successively, and the first chopper is arranged on side of the positive electrode,
Second chopper is arranged on PCS side, and the 3rd chopper and the 4th chopper are electrically connected with negative pole successively
Connecing, and the 3rd chopper is arranged on negative side, the 4th chopper is arranged on PCS side；
When described state detection module detects that described chopper all closes, and the detection of described high pressure
Module collect described breaker control module perform before described instruction described negative pole voltage-to-ground and
Described positive pole voltage-to-ground by unequal change to equal time, described processing module sends instruction, control
Described breaker control module first disconnects in chopper and the described loop of power circuit of described negative side
PCS side and the chopper that is connected with described positive electrical, then disconnect the chopper of described side of the positive electrode.
Electrical leakage detecting method the most according to claim 1, it is characterised in that described chopper
For multiple, it is separately positioned on side of the positive electrode, negative side and PCS side；
Wherein, described chopper includes first, second, third and the 4th chopper, and first breaks
Road device and the second chopper are connected with positive electrical successively, and the first chopper is arranged on side of the positive electrode,
Second chopper is arranged on PCS side, and the 3rd chopper and the 4th chopper are electrically connected with negative pole successively
Connecing, and the 3rd chopper is arranged on negative side, the 4th chopper is arranged on PCS side；
When described state detection module detects that described chopper all closes, and the detection of described high pressure
Module collect described breaker control module perform before described instruction described negative pole voltage-to-ground and
Described positive pole voltage-to-ground by unequal change to equal time, described processing module sends instruction, control
Described breaker control module first disconnects the chopper of described PCS side, then disconnects described side of the positive electrode
Chopper.
7. according to the electrical leakage detecting method described in any one of claim 3,4,5 or 6, its feature
It is,
Described high pressure detection module gathers described negative pole voltage-to-ground during the described chopper of twice disconnection
With described positive pole voltage-to-ground；
When disconnecting described chopper for the first time, described negative pole voltage-to-ground and described positive pole are the most electric
Press unequal, when second time disconnects described chopper, described negative pole voltage-to-ground and described positive pole
When voltage-to-ground is equal, described processing module judges now to there is electric leakage.
8. a current leakage detection system for energy-accumulating power station, described current leakage detection system include battery pile,
Catalyst, chopper, testing circuit and PCS, it is characterised in that described battery pile just includes
Pole and negative pole, described chopper is multiple, and it is separately positioned on side of the positive electrode, negative side and PCS
Side；
Wherein, described chopper includes first, second, third and the 4th chopper, and first breaks
Road device and the second chopper are connected with positive electrical successively, and the first chopper is arranged on side of the positive electrode,
Second chopper is arranged on PCS side, and the 3rd chopper and the 4th chopper are electrically connected with negative pole successively
Connecing, and the 3rd chopper is arranged on negative side, the 4th chopper is arranged on PCS side；
Described catalyst is at least one, and it is arranged between positive pole and PCS；
Described testing circuit includes high pressure detection module, state detection module, breaker control module
And processing module, wherein:
Described state detection module is described disconnected for detect on the loop of power circuit of described energy-accumulating power station
Road device or the state that is opened or closed of described catalyst also feed back to described processing module；
Described breaker control module disconnects described power for the instruction according to described processing module
The described chopper of at least one on loop；
Wherein, described high pressure detection module gathers described breaker control module respectively and performs described finger
Before order and perform the negative pole voltage-to-ground of described battery pile after described instruction and positive pole voltage-to-ground is
No equal situation, according to described situation, described processing module judges whether described energy-accumulating power station exists
Electric leakage.
Current leakage detection system the most according to claim 8, it is characterised in that when described state
When detection module detects at least one disconnection of described catalyst or described chopper, described process
Module sends instruction, controls described breaker control module and disconnects the chopper of described PCS side；
Described high pressure detection module gathers the most described negative pole voltage-to-ground and described positive pole is the most electric
Pressure；
When described negative pole voltage-to-ground and described positive pole voltage-to-ground are equal, and for described negative pole and institute
When stating the half of voltage between positive pole, described processing module judges the most to there is not electric leakage.
Current leakage detection system the most according to claim 8, it is characterised in that when described shape
State detection module detects that described catalyst and described chopper all close, and the detection of described high pressure
Module collect described breaker control module perform before described instruction described negative pole voltage-to-ground and
Described positive pole voltage-to-ground by unequal change to equal time, described processing module sends instruction, control
Described breaker control module first disconnects the chopper of described PCS side, then disconnects described negative side
Chopper；
Described high pressure detection module gathers described negative pole voltage-to-ground during the described chopper of twice disconnection
With described positive pole voltage-to-ground；
When disconnecting described chopper for the first time, described negative pole voltage-to-ground and described positive pole are the most electric
Press unequal, when second time disconnects described chopper, described negative pole voltage-to-ground and described positive pole
Voltage-to-ground is equal, and described processing module judges now to there is electric leakage.
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| CN201210560762.8A CN103884950B (en) | 2012-12-20 | 2012-12-20 | The current leakage detection system of a kind of energy-accumulating power station and electrical leakage detecting method |
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| CN201210560762.8A CN103884950B (en) | 2012-12-20 | 2012-12-20 | The current leakage detection system of a kind of energy-accumulating power station and electrical leakage detecting method |
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| CN105510759B (en) * | 2015-11-30 | 2019-05-28 | 华为技术有限公司 | Electric leak detecting device and its detection method |
| CN112858894A (en) * | 2019-11-28 | 2021-05-28 | 北京宝沃汽车股份有限公司 | Detection method and detection device for working state of contactor, storage medium and vehicle |
| CN113552495B (en) * | 2021-07-27 | 2022-11-22 | 石家庄通合电子科技股份有限公司 | Online detection method and device for leakage of storage battery of power supply system |
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| JP3734236B2 (en) * | 1997-12-10 | 2006-01-11 | サンデン株式会社 | Electric vehicle air conditioner power supply input circuit |
| JP2002252986A (en) * | 2001-02-26 | 2002-09-06 | Canon Inc | Inverter, power supply system and method for reducing leakage current in power supply system |
| CN101199094B (en) * | 2006-04-11 | 2011-01-05 | 三菱电机株式会社 | Electric power storage system |
| JP4785627B2 (en) * | 2006-06-08 | 2011-10-05 | 三洋電機株式会社 | Electric vehicle leakage detection circuit and electric vehicle leakage detection method |
| CN200956048Y (en) * | 2006-09-20 | 2007-10-03 | 上海益而益电器制造有限公司 | Leakage detecting aircuit |
| CN201174578Y (en) * | 2007-09-03 | 2008-12-31 | 钟汝祥 | Energy storage circuit break self-cutting leakage protection switch |
| CN201797296U (en) * | 2010-08-13 | 2011-04-13 | 颜福随 | Multifunctional intelligent earth leakage circuit breaker |
| TW201237432A (en) * | 2011-03-10 | 2012-09-16 | Eneraiser Technology Co Ltd | Insulation failure detection circuit in the course of DC power supply |
| JP2012208067A (en) * | 2011-03-30 | 2012-10-25 | Keihin Corp | Battery voltage detection device |
| CN203117337U (en) * | 2012-12-20 | 2013-08-07 | 东莞钜威新能源有限公司 | Electric leakage detection system of energy storage power station |
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