CN102904228A - Protection method and protection device of power distribution network - Google Patents
Protection method and protection device of power distribution network Download PDFInfo
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- CN102904228A CN102904228A CN2012103946389A CN201210394638A CN102904228A CN 102904228 A CN102904228 A CN 102904228A CN 2012103946389 A CN2012103946389 A CN 2012103946389A CN 201210394638 A CN201210394638 A CN 201210394638A CN 102904228 A CN102904228 A CN 102904228A
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Abstract
The invention relates to a protection method and a protection device of a power distribution network. The method comprises the following step of: arranging the protection devices used for carrying out logic control on opening and closing states on the breaker switch, linked switch and recloser of the power distribution network with phase voltages (UA, UB and UC) and phase currents (IA, IB and IC), wherein the logic control comprises voltage loss opening protection, hemi-voltage reclosing protection, current protection type voltage reclosing, latch-up separating protection, reclosing detection failure current protection, transient voltage latch-up protection, bilateral voltage latch-up closing protection, ring closing input withdrawing and hemi-voltage closing; and each protection device comprises a mutual inductor, a signal amplification circuit, a signal conditioning circuit (filtering circuit), an A/D (Analog/Digital) conversion module, an optical coupler, a communication module and a CPU (Central Processing Unit). By virtue of a plurality of creative protection logics and the corresponding protection devices, rapid fault region isolation and non-fault region power supply recovery for the power distribution network can be realized.
Description
Technical field
The present invention relates to the power distribution network technical field of relay protection, be specifically related to a kind of guard method and protective device of power distribution network.
Background technology
Intelligent grid has become the inexorable trend of power network development, and each state is all greatly developing intelligent grid.Along with the high speed development of social economy with science and technology, society has proposed more and more higher standard and requirement to the electric power supply of high-quality and high reliability.State Grid Corporation of China clearly proposes to build and has " informationization, automation, interactive intelligent grid ", State Grid Corporation of China requires this: power supply enterprise's power supply reliability index that should reach from now on, general urban area is 99.96%, make the annual interruption duration of each household be not more than 3.5 hours, the important city center should reach 99.99%, make the annual interruption duration of each household be not more than 0.876 hour, namely 53 minutes.What therefore present intelligent grid mainly solved is how piece speed realizes the line fault isolation and recovers the problem of non-fault zone power supply.The utilization of tradition electric network protection is installed in the fault detector on the distribution line, by electric power overhaul people finder fault section, and utilizes the artificial isolated fault section of on-pole switch equipment, recovers the power supply of normal reach.The interruption duration of this mode is long, and it is slow to restore electricity.Patent of the present invention provides a kind of distribution protection method and protective device, by cooperatively interacting between them, realizes the on the spot automatism isolation of fault and restores electricity; the method can realize fast recovery of power supply; automatization level is higher, need not communication and just can realize controlling function, and cost is lower.
Summary of the invention
The invention provides and a kind ofly be applicable to contain two with guard method and the protective device of the looped network pattern power distribution network of power source and single power supply, restore electricity to realize its quick fault section isolation and non-fault zone.
The guard method of described power distribution network comprises
Has phase voltage U
A, U
B, U
CWith phase current I
A, I
B, I
CKiller switch, interconnection switch and the automatic circuit of power distribution network on the protective device that folding condition is carried out logic control is set;
Described logic control comprises
1) decompression separating brake protection
If, U
2Be respectively the no-voltage threshold value and without the electric threshold value of stream, work as U with I
A＜U
2, U
B＜U
2, U
C＜U
2, I
A＜I, I
B＜I, I
CDuring＜I, be in automatic brake separating behind the killer switch time-delay T0 of "on" position, T0 is less than described distribution network master station reclosure time;
2) side is come the ballast closing protective
A. the voltage protection type comes ballast to close a floodgate
Manual brake separating is not possessed to press the decompression separating brake of automatic closing, be in minute T3 of position in the time, if killer switch one side phase voltage U at killer switch
A〉=U
1, U
B〉=U
1, U
C〉=U
1And killer switch opposite side phase voltage＜U
2,＜U
2,＜U
2, or killer switch one side phase voltage U
A＜U
2, U
B＜U
2, U
C＜U
2And killer switch opposite side phase voltage 〉=U
1, 〉=U
1, 〉=U
1, automatic closing behind the killer switch time-delay T1, U1 is for there being the pressure threshold value;
B. the current protection type comes ballast to close a floodgate
Manual brake separating is not possessed to press the current protection separating brake of automatic closing, be in minute T3 of position in the time, if killer switch one side phase voltage U at killer switch
A〉=U
1, U
B〉=U
1, U
C〉=U
1And killer switch opposite side phase voltage＜U
2,＜U
2,＜U
2, or killer switch one side phase voltage U
A＜U
2, U
B＜U
2, U
C＜U
2And killer switch opposite side phase voltage
〉=U
1, 〉=U
1, 〉=U
1, automatic closing behind the killer switch time-delay T2, T1＞T2;
3) locking separating brake protection
Killer switch is in minute T3 of position in the time, if come in setting-up time T4, not detect after the pressing lock current failure, locking separating brake function then, locking involution behind the time-delay T5, reclosure time＞T4＞three section current protection time-delay maximum duration, T5 is a minute level time-delay;
4) detection failure current protection behind the reclosing
The T6 that killer switch closes a floodgate detects fault current in the time, the operation of locking automatic closing, and T6＜T2, unlocking condition are the closing by hand release;
5) press off the lock protection wink
Behind the decompression separating brake, killer switch is decompression after the T7 of separating brake detects transient voltage in the time, and then circuit breaker lock closes a floodgate, and namely wink presses off lock, and the reclosure time of T7 〉=transformer station's outlet switch, unlocking condition are the closing by hand release;
6) both sides press off sealed lock protection
Killer switch two ends phase voltage satisfies: U
A〉=U
1Or U
B〉=U
1Or U
C〉=U
1Simultaneously 〉=U
1Or
〉=U
1Or 〉=U
1The time, carry out locking automatically and the closing by hand operation, but when cyclization drops into permission and satisfies the cyclization service conditions, carry out closing operation;
7) cyclization input throwing surrender is protected
Killer switch two ends phase voltage satisfies: U
A〉=U
1, U
B〉=U
1, U
C〉=U
1Simultaneously 〉=U
1, 〉=U
1, 〉=U
1And the corresponding phase voltage in both sides is poor during less than 0-30%Un, allows manual Loop Closing Operation, and Un is the magnitude of voltage of the less end in circuit breaker two ends;
8) a side decompression closing protective
Interconnection switch is in gate-dividing state, two ends phase voltage U
A〉=U
1, U
B〉=U
1, U
C〉=U
1Simultaneously 〉=U
1, 〉=U
1, 〉=U
1And there is the pressure condition duration at two ends greater than T8, and the switch time-delay T9 time closes a floodgate;
The inventive method is characterised in that; the protected mode of described power distribution network is set to main line protected mode, branch line protected mode and interconnection switch protected mode; the described logic control of described main line protected mode for the main line switch is correlated with; the described logic control of described branch line protected mode for a wiretap is correlated with, the described logic control of described interconnection switch protected mode for interconnection switch is correlated with.
The inventive method is characterised in that:
The protection logic that described main line protected mode adopts comprises the protection of decompression separating brake, presses off the lock protection wink, the protection of locking separating brake, voltage protection type come ballast to close a floodgate, the current protection type comes ballast combined floodgates, three sections current protections (specified time), accelerate detection failure current protection and PT burn out detection behind jumping protection, the reclosing.
The protection logic that described branch line protected mode adopts comprises the protection of decompression separating brake, presses off the lock protection wink, the protection of locking separating brake, voltage protection type come ballast to close a floodgate, the current protection type comes ballast combined floodgates, three sections current protections (specified time), accelerate detection failure current protection and PT burn out detection behind jumping protection, the reclosing.
The protection logic that described interconnection switch protected mode adopts comprises that both sides press off the protection of lock automatic closing, cyclization and drop into that surrender is protected, a side decompression is hauled oneself willingly into protection and press off the lock protection wink.
The inventive method relates to a corresponding protective device.
Protective device of the present invention comprises:
Be used for gathering killer switch two ends phase voltage U
A, U
B, U
CAnd, and phase current I
A, I
B, I
CThe instrument transformer of signal;
Be used for the signal collected amplifying signal amplifying circuit that carries out of instrument transformer;
Be used for signal is carried out the signal conditioning circuit (filter circuit) that the signal of amplifying circuit output carries out denoising;
Be used for the analog quantity of signal conditioning circuit (filter circuit) is converted to the A/D modular converter of digital quantity;
Be used for the optocoupler that switch amount inputs or outputs
The communication module that is used for remote monitoring
With being used for A/D modular converter, optocoupler and communication module output signal are carried out the CPU that optocoupler or communication module were processed and result was delivered to data.
Protective device of the present invention is characterised in that, described CPU comprises the MCU digital signal processor, embed killer switch, interconnection switch and automatic circuit folding condition are carried out the DSP digital signal processor of logic control program and connect the dual port RAM of described MCU and DSP.
Protective device of the present invention is characterised in that, comprising:
Be used for gathering killer switch two ends phase voltage U
A, U
B, U
CAnd, and phase current I
A, I
B, I
CThe instrument transformer of signal;
Be used for the signal collected amplifying signal amplifying circuit that carries out of instrument transformer;
Be used for signal is carried out the signal conditioning circuit (filter circuit) that the signal of amplifying circuit output carries out denoising;
Be used for the analog quantity of signal conditioning circuit (filter circuit) is converted to the A/D modular converter of digital quantity;
Be used for the optocoupler that switch amount inputs or outputs
The communication module that is used for remote monitoring
With being used for A/D modular converter, optocoupler and communication module output signal are carried out the CPU that optocoupler or communication module were processed and result was delivered to data.
Protective device of the present invention is characterised in that, described CPU comprises the MCU digital signal processor, embed killer switch, interconnection switch and automatic circuit folding condition are carried out the dsp processor chip of logic control program and connect the dual port RAM of described MCU digital signal processor and DSP digital signal processor.
Protective device of the present invention is characterised in that described logic control comprises:
1) decompression separating brake protection
If, U
2Be respectively the no-voltage threshold value and without the electric threshold value of stream, work as U with I
A＜U
2, U
B＜U
2, U
C＜U
2, I
A＜I, I
B＜I, I
CDuring＜I, be in automatic brake separating behind the killer switch time-delay T0 of "on" position, T0 is less than described distribution network master station reclosure time;
2) side is come the ballast closing protective
A. the voltage protection type comes ballast to close a floodgate
Manual brake separating is not possessed to press the decompression separating brake of automatic closing, be in minute T3 of position in the time, if killer switch one side phase voltage U at killer switch
A〉=U
1, U
B〉=U
1, U
C〉=U
1And killer switch opposite side phase voltage＜U
2,＜U
2,＜U
2, or killer switch one side phase voltage U
A＜U
2, U
B＜U
2, U
C＜U
2And killer switch opposite side phase voltage 〉=U
1, 〉=U
1, 〉=U
1, automatic closing behind the killer switch time-delay T1, U1 is for there being the pressure threshold value;
B. the current protection type comes ballast to close a floodgate
Manual brake separating is not possessed to press the current protection separating brake of automatic closing, be in minute T3 of position in the time, if killer switch one side phase voltage U at killer switch
A〉=U
1, U
B〉=U
1, U
C〉=U
1And killer switch opposite side phase voltage＜U
2,＜U
2,＜U
2, or killer switch one side phase voltage U
A＜U
2, U
B＜U
2, U
C＜U
2And killer switch opposite side phase voltage
〉=U
1, 〉=U
1, 〉=U
1, automatic closing behind the killer switch time-delay T2, T1＞T2;
3) locking separating brake protection
Killer switch is in minute T3 of position in the time, if come in setting-up time T4, not detect after the pressing lock current failure, locking separating brake function then, locking involution behind the time-delay T5, reclosure time＞T4＞three section current protection time-delay maximum duration, T5 is a minute level time-delay;
4) detection failure current protection behind the reclosing
The T6 that killer switch closes a floodgate detects fault current in the time, the operation of locking automatic closing, and T6＜T2, unlocking condition are the closing by hand release;
5) press off the lock protection wink
Behind the decompression separating brake, killer switch is decompression after the T7 of separating brake detects transient voltage in the time, and then circuit breaker lock closes a floodgate, and namely wink presses off lock, and the reclosure time of T7 〉=transformer station's outlet switch, unlocking condition are the closing by hand release;
6) both sides press off sealed lock protection
Killer switch two ends phase voltage satisfies: U
A〉=U
1Or U
B〉=U
1Or U
C〉=U
1Simultaneously 〉=U
1Or 〉=U
1Or 〉=U
1The time, carry out locking automatically and the closing by hand operation, but when cyclization drops into permission and satisfies the cyclization service conditions, carry out closing operation;
7) cyclization input throwing surrender is protected
Killer switch two ends phase voltage satisfies: U
A〉=U
1, U
B〉=U
1, U
C〉=U
1Simultaneously 〉=U
1, 〉=U
1, 〉=U
1And the corresponding phase voltage in both sides is poor during less than 0-30%Un, allows manual Loop Closing Operation, and Un is the magnitude of voltage of the less end in circuit breaker two ends;
8) a side decompression closing protective
Interconnection switch is in gate-dividing state, two ends phase voltage U
A〉=U
1, U
B〉=U
1, U
C〉=U
1Simultaneously 〉=U
1,
〉=U
1,
〉=U
1And there is the pressure condition duration at two ends greater than T8, and the switch time-delay T9 time closes a floodgate;
Protective device of the present invention is characterised in that; the protected mode of described power distribution network is set to main line protected mode, branch line protected mode and interconnection switch protected mode; the described logic control of described main line protected mode for the main line switch is correlated with; the described logic control of described branch line protected mode for a wiretap is correlated with, the described logic control of described interconnection switch protected mode for interconnection switch is correlated with.
Protective device of the present invention is characterised in that:
The protection logic that described main line protected mode adopts comprises the protection of decompression separating brake, presses off the lock protection wink, the protection of locking separating brake, voltage protection type come ballast to close a floodgate, the current protection type comes ballast combined floodgates, three sections current protections (specified time), accelerate detection failure current protection and PT burn out detection behind jumping protection, the reclosing.
The protection logic that described branch line protected mode adopts comprises the protection of decompression separating brake, presses off the lock protection wink, the protection of locking separating brake, voltage protection type come ballast to close a floodgate, the current protection type comes ballast combined floodgates, three sections current protections (specified time), accelerate detection failure current protection and PT burn out detection behind jumping protection, the reclosing.
The protection logic that described interconnection switch protected mode adopts comprises that both sides press off the protection of lock automatic closing, cyclization and drop into that surrender is protected, a side decompression is hauled oneself willingly into protection and press off the lock protection wink.
The inventive method is by some creative protection logics; and carry out applied in any combination according to the characteristics of main line, branch line and interconnection switch in the power distribution network; improved the efficient that fault zone detection, location, isolation and non-fault zone restore electricity; realize that its fast unit detection, fault location, fault section isolation and non-fault zone restore electricity; the method need not communication just can realize controlling function; cost is low; but automaticity is high, reliable, stable, the safety of logical too much grid company experiment operation proof protective device of the present invention.
Description of drawings
The structural representation of Fig. 1 protective device of the present invention.
Fig. 2 is the schematic diagram of signal amplification circuit and signal conditioning circuit (filter circuit).
Fig. 3 is the switching value input circuit schematic diagram.
Fig. 4 left side figure is the switching value output circuit schematic diagram.
Fig. 4 the right figure is looped network pattern power distribution network that the present invention is applied to dual power supply switch running status figure when being in normal operation.
Fig. 5 the present invention is applied to switch running status figure behind its main line fault section isolation of looped network pattern power distribution network of dual power supply.
Fig. 6 the present invention is applied to its main line fault section isolation of looped network pattern power distribution network of dual power supply and the non-fault zone switch running status figure that restores electricity.
Fig. 7 is that looped network pattern power distribution network that the present invention is applied to dual power supply carries out the switch running status figure that decompression is hauled oneself willingly into defencive function.
Fig. 8 is that the present invention is applied to switch running status figure after its fault of branch line zone isolation of looped network pattern power distribution network of dual power supply.
Fig. 9 is that the present invention is applied to its fault of branch line zone isolation of looped network pattern power distribution network of dual power supply and the non-fault zone switch running status figure that restores electricity.
Embodiment
Fig. 1 is a specific embodiment of protective device of the present invention, and this protective device mainly is comprised of instrument transformer, signal amplification circuit, signal conditioning circuit (filter circuit), A/D modular converter, optocoupler, communication module and CPU.Wherein, instrument transformer, signal amplification circuit, signal conditioning circuit (filter circuit), A/D modular converter consist of signal acquisition module; CPU is then mainly by DSP digital signal processor, MCU digital signal processor be connected the dual port RAM that this two chip communicates connection and form, and the MCU processor chips comprise clock chip and LED reports to the police and the human-computer interaction module that is comprised of liquid crystal display screen and button etc.DSP in the present embodiment and MCU digital signal processor adopt respectively TMS320F2835 and STC12LE5A60S2, and the A/D modular converter adopts ADS8364; Liquid crystal display screen adopts Organic Light Emitting Diode OLED, so that it normally uses under the adverse circumstances such as-40 ℃.
Instrument transformer gathers the voltage U at circuit breaker two ends
A, U
B, U
CAnd, and electric current I
A, I
B, I
CSignal carries out respectively 8 road voltages and 8 road current acquisitions, the 4 tunnel for detection of, the 4 tunnel for the protection of.The voltage, the current signal that obtain from instrument transformer carry out signal amplification (adopting precision amplifier OP07) by signal amplification circuit as shown in Figure 2, and amplifying signal inputted signal conditioning circuit (filter circuit shown in Figure 3, adopt two-way amplifier AD706IA) this amplifying signal is carried out denoising, the analog signal of its output is converted to digital signal through the A/D modular converter and is transported to DSP digital signal processor corresponding data mouth through data port.Have the optocoupler of 8 way switch amounts input with circuit-breaker switching on-off state, isolation knife position, the switching signals such as earthed switch are delivered to DSP digital signal processor corresponding data mouth.Its switching value input circuit as shown in Figure 3, switching value input provides the signal of 12V by B1212S-2W, R1 is current-limiting resistance, R2 forms filter circuit with C1 and eliminates the spike interference.D1 is voltage-stabiliser tube TVS, can protect optocoupler to prevent from disturbing high voltage signal to cause breakdown to destroy to it.Adopt light-coupled isolation between switching value input and device internal circuit, effectively isolated the infringement that interference signal may cause device.The operator can arrange protected mode by the human-computer interaction module of liquid crystal display screen and button; the MCU digital signal processor is processed interactive signal and is carried out the data transmission by dual port RAM and DSP digital signal processor in good time; the operator also can carry out long-range setting and control by communication module; the DSP digital signal processor carries out data according to the control logic of the protection distribution network that embeds to be processed, and by switching value corresponding to optocoupler output related switch is controlled.Switching value output circuit is selected the ST2-DC12V relay of PANASONIC as shown in Figure 4, and drive circuit is controlled by large electric current Darlington transistor ULN2003A, can control the pass of No. 7 relays and close.
Fig. 5 is a pair of electric source modes power distribution network, all is provided with protective device as shown in Figure 2 on automatic circuit CH1, CH2 wherein, CH3, CH4, CH6 and the interconnection switch CH5.Outlet switch CB1, CB2 are in "on" position under normal circumstances, automatic circuit CH1, CH2, CH3, CH4, the CH6 switch of serving as theme, and CH5 is interconnection switch, is in gate-dividing state.
Such as Fig. 5, when the permanent short fault occurs in the A point, outlet switch CB1, the tripping operation of automatic circuit CH3 current protection, automatic circuit CH1, CH4 is the T0=2s tripping operation after starting decompression separating brake protection logical time delay 2S, U2=0, I=0, behind the 2s, outlet switch CB1 carries out reclosing, behind the CH1 time-delay 10S, be that T1=10s carries out the voltage protection type and comes ballast to close a floodgate, and in the 5s, namely T4=5s does not detect fault current behind combined floodgate, starts locking separating brake defencive function (automatic unlocking after the open hour), be T2=8s behind the 8s, CH3 carries out the current protection type and comes ballast to close a floodgate, because still there is CB1 in fault current, CH3 is current protection tripping operation and locking CH3 combined floodgate (closing by hand release) again, at the CH3 reclosing in the process of separating brake again, CH4 is in gate-dividing state and detects in short-term moment residual voltage, and CH4 starts and presses off lock defencive function (closing by hand release) wink, and B point permanent fault is isolated; Behind the 2s, outlet switch CB1 is reclosing again, and CB1, CH1, CH2 circuit recover normal power supply, such as Fig. 6; If the side decompression at interconnection switch CH5 is hauled oneself willingly in the guard time, fault successfully is excluded, and manually controls CH3 and CH4 and closes a floodgate, and then all circuits recover normal power supply; Haul oneself willingly into the protection delay time if arrive the side decompression of interconnection switch CH5; fault also is not eliminated; CH3 and CH4 still are in and wink press off lock status; CH5 starts a decompression and hauls oneself willingly into defencive function; carry out feed motion, recover CH4 to the power supply of CH5 circuit, the permanent fault faulty line is isolated; all non-fault line restores electricity, such as Fig. 7.
Such as Fig. 8, when permanent fault occurs in the B point, outlet switch CB1, the tripping operation of automatic circuit CH2 current protection, automatic circuit CH1, CH3, CH4 are the T0=2s tripping operation after starting decompression separating brake protection logical time delay 2S, U2=0, I=0.Behind the 2s; outlet switch CB1 carries out reclosing; behind the CH2 time-delay 8S; be that T2=8s carries out the current protection type and comes ballast to close a floodgate, because still there is outlet switch CB1 in fault current, again current protection tripping operation of automatic circuit CH2; in 5s; be that T4=5s automatic circuit CH2 again detects current failure and starts detection failure current protecting function locking CH2 closing function behind the reclosing, fault section isolation is such as Fig. 9.Behind the 2s, outlet switch CB1 carries out reclosing, and loyal power supply is recovered in non-fault zone, and power system restoration normally moves.
Claims (10)
1. the guard method of power distribution network comprises
Has phase voltage U
A, U
B, U
CWith phase current I
A, I
B, I
CKiller switch, interconnection switch and the automatic circuit of power distribution network on the protective device that folding condition is carried out logic control is set;
Described logic control comprises
The protection of decompression separating brake
If, U
2Be respectively the no-voltage threshold value and without the electric threshold value of stream, work as U with I
A＜U
2, U
B＜U
2, U
C＜U
2, I
A＜I, I
B＜I, I
CDuring＜I, be in automatic brake separating behind the killer switch time-delay T0 of "on" position, T0 is less than described distribution network master station reclosure time;
2) side is come the ballast closing protective
A. the voltage protection type comes ballast to close a floodgate
Manual brake separating is not possessed to press the decompression separating brake of automatic closing, be in minute T3 of position in the time, if killer switch one side phase voltage U at killer switch
A〉=U
1, U
B〉=U
1, U
C〉=U
1And killer switch opposite side phase voltage＜U
2,＜U
2,＜U
2, or killer switch one side phase voltage U
A＜U
2, U
B＜U
2, U
C＜U
2And killer switch opposite side phase voltage 〉=U
1, 〉=U
1, 〉=U
1, automatic closing behind the killer switch time-delay T1, U1 is for there being the pressure threshold value;
B. the current protection type comes ballast to close a floodgate
Manual brake separating is not possessed to press the current protection separating brake of automatic closing, be in minute T3 of position in the time, if killer switch one side phase voltage U at killer switch
A〉=U
1, U
B〉=U
1, U
C〉=U
1And killer switch opposite side phase voltage＜U
2,＜U
2,＜U
2, or killer switch one side phase voltage U
A＜U
2, U
B＜U
2, U
C＜U
2And killer switch opposite side phase voltage 〉=U
1, 〉=U
1, 〉=U
1, automatic closing behind the killer switch time-delay T2, T1＞T2;
The protection of locking separating brake
Killer switch is in minute T3 of position in the time, if come in setting-up time T4, not detect after the pressing lock current failure, locking separating brake function then, locking involution behind the time-delay T5, reclosure time＞T4＞three section current protection time-delay maximum duration, T5 is a minute level time-delay;
4) detection failure current protection behind the reclosing
The T6 that killer switch closes a floodgate detects fault current in the time, the operation of locking automatic closing, and T6＜T2, unlocking condition are the closing by hand release;
5) press off the lock protection wink
Behind the decompression separating brake, killer switch is decompression after the T7 of separating brake detects transient voltage in the time, and then circuit breaker lock closes a floodgate, and namely wink presses off lock, and the reclosure time of T7 〉=transformer station's outlet switch, unlocking condition are the closing by hand release;
6) both sides press off sealed lock protection
Killer switch two ends phase voltage satisfies: U
A〉=U
1Or U
B〉=U
1Or U
C〉=U
1Simultaneously
〉=U
1Or 〉=U
1Or 〉=U
1The time, carry out locking automatically and the closing by hand operation, but when cyclization drops into permission and satisfies the cyclization service conditions, carry out closing operation;
7) cyclization input throwing surrender is protected
Killer switch two ends phase voltage satisfies: U
A〉=U
1, U
B〉=U
1, U
C〉=U
1Simultaneously 〉=U
1, 〉=U
1, 〉=U
1And the corresponding phase voltage in both sides is poor to be the less magnitudes of voltage in circuit breaker two ends less than 0-30%Un(Un) time, allow manual Loop Closing Operation;
8) a side decompression closing protective
Interconnection switch is in gate-dividing state, two ends phase voltage U
A〉=U
1, U
B〉=U
1, U
C〉=U
1Simultaneously 〉=U
1, 〉=U
1,
〉=U
1And there is the pressure condition duration at two ends greater than T8, and the switch time-delay T9 time closes a floodgate.
2. the guard method of power distribution network according to claim 1; the protected mode that it is characterized in that described power distribution network is set to main line protected mode, branch line protected mode and interconnection switch protected mode; the described logic control of described main line protected mode for the main line switch is correlated with; the described logic control of described branch line protected mode for a wiretap is correlated with, the described logic control of described interconnection switch protected mode for interconnection switch is correlated with.
3. the guard method of power distribution network according to claim 2 is characterized in that
The protection logic that described main line protected mode adopts comprises the protection of decompression separating brake, presses off the lock protection wink, the protection of locking separating brake, voltage protection type come ballast to close a floodgate, the current protection type comes ballast combined floodgates, three sections current protections (specified time), accelerate detection failure current protection and PT burn out detection behind jumping protection, the reclosing;
The protection logic that described branch line protected mode adopts comprises the protection of decompression separating brake, presses off the lock protection wink, the protection of locking separating brake, voltage protection type come ballast to close a floodgate, the current protection type comes ballast combined floodgates, three sections current protections (specified time), accelerate detection failure current protection and PT burn out detection behind jumping protection, the reclosing;
The protection logic that described interconnection switch protected mode adopts comprises that both sides press off the protection of lock automatic closing, cyclization and drop into that surrender is protected, a side decompression is hauled oneself willingly into protection and press off the lock protection wink.
4. the guard method of power distribution network according to claim 1 is characterized in that described protective device, comprising:
Be used for gathering killer switch two ends phase voltage U
A, U
B, U
CAnd, and phase current I
A, I
B, I
CThe instrument transformer of signal;
Be used for the signal collected amplifying signal amplifying circuit that carries out of instrument transformer;
Be used for signal is carried out the signal conditioning circuit (filter circuit) that the signal of amplifying circuit output carries out denoising;
Be used for the analog quantity of signal conditioning circuit (filter circuit) is converted to the A/D modular converter of digital quantity;
Be used for the optocoupler that switch amount inputs or outputs
The communication module that is used for remote monitoring
With being used for A/D modular converter, optocoupler and communication module output signal are carried out the CPU that optocoupler or communication module were processed and result was delivered to data.
5. protective device according to claim 4 is characterized in that described CPU comprises the MCU digital signal processor, embeds killer switch, interconnection switch and automatic circuit folding condition are carried out the DSP digital signal processor of logic control program and connect the dual port RAM of described MCU and DSP.
6. such as the protective device of the guard method of each described power distribution network of claim 1-5, comprising:
Be used for gathering killer switch two ends phase voltage U
A, U
B, U
CAnd, and phase current I
A, I
B, I
CThe instrument transformer of signal;
Be used for the signal collected amplifying signal amplifying circuit that carries out of instrument transformer;
Be used for signal is carried out the signal conditioning circuit (filter circuit) that the signal of amplifying circuit output carries out denoising;
Be used for the analog quantity of signal conditioning circuit (filter circuit) is converted to the A/D modular converter of digital quantity;
Be used for the optocoupler that switch amount inputs or outputs
The communication module that is used for remote monitoring
With being used for A/D modular converter, optocoupler and communication module output signal are carried out the CPU that optocoupler or communication module were processed and result was delivered to data.
7. protective device according to claim 6 is characterized in that described CPU comprises the MCU digital signal processor, embeds killer switch, interconnection switch and automatic circuit folding condition are carried out the DSP digital signal processor of logic control program and connect the dual port RAM of described MCU and DSP.
8. protective device according to claim 7 is characterized in that described logic control comprises:
1) decompression separating brake protection
If, U
2Be respectively the no-voltage threshold value and without the electric threshold value of stream, work as U with I
A＜U
2, U
B＜U
2, U
C＜U
2, I
A＜I, I
B＜I, I
CDuring＜I, be in automatic brake separating behind the killer switch time-delay T0 of "on" position, T0 is less than described distribution network master station reclosure time;
2) side is come the ballast closing protective
A. the voltage protection type comes ballast to close a floodgate
Manual brake separating is not possessed to press the decompression separating brake of automatic closing, be in minute T3 of position in the time, if killer switch one side phase voltage U at killer switch
A〉=U
1, U
B〉=U
1, U
C〉=U
1And killer switch opposite side phase voltage
＜U
2,＜U
2,＜U
2, or killer switch one side phase voltage U
A＜U
2, U
B＜U
2, U
C＜U
2And killer switch opposite side phase voltage 〉=U
1, 〉=U
1,
〉=U
1, automatic closing behind the killer switch time-delay T1, U1 is for there being the pressure threshold value;
B. the current protection type comes ballast to close a floodgate
Manual brake separating is not possessed to press the current protection separating brake of automatic closing, be in minute T3 of position in the time, if killer switch one side phase voltage U at killer switch
A〉=U
1, U
B〉=U
1, U
C〉=U
1And killer switch opposite side phase voltage＜U
2,＜U
2,＜U
2, or killer switch one side phase voltage U
A＜U
2, U
B＜U
2, U
C＜U
2And killer switch opposite side phase voltage 〉=U
1, 〉=U
1, 〉=U
1, automatic closing behind the killer switch time-delay T2, T1＞T2;
The protection of locking separating brake
Killer switch is in minute T3 of position in the time, if come in setting-up time T4, not detect after the pressing lock current failure, locking separating brake function then, locking involution behind the time-delay T5, reclosure time＞T4＞three section current protection time-delay maximum duration, T5 is a minute level time-delay;
4) detection failure current protection behind the reclosing
The T6 that killer switch closes a floodgate detects fault current in the time, the operation of locking automatic closing, and T6＜T2, unlocking condition are the closing by hand release;
5) press off the lock protection wink
Behind the decompression separating brake, killer switch is decompression after the T7 of separating brake detects transient voltage in the time, and then circuit breaker lock closes a floodgate, and namely wink presses off lock, and the reclosure time of T7 〉=transformer station's outlet switch, unlocking condition are the closing by hand release;
6) both sides press off sealed lock protection
Killer switch two ends phase voltage satisfies: U
A〉=U
1Or U
B〉=U
1Or U
C〉=U
1Simultaneously 〉=U
1Or 〉=U
1Or 〉=U
1The time, carry out locking automatically and the closing by hand operation, but when cyclization drops into permission and satisfies the cyclization service conditions, carry out closing operation;
7) cyclization input throwing surrender is protected
Killer switch two ends phase voltage satisfies: U
A〉=U
1, U
B〉=U
1, U
C〉=U
1Simultaneously 〉=U
1, 〉=U
1, 〉=U
1And the corresponding phase voltage in both sides is poor during less than 0-30%Un, allows manual Loop Closing Operation, and Un is the magnitude of voltage of the less end in circuit breaker two ends;
8) a side decompression closing protective
Interconnection switch is in gate-dividing state, two ends phase voltage U
A〉=U
1, U
B〉=U
1, U
C〉=U
1Simultaneously 〉=U
1,
〉=U
1, 〉=U
1And there is the pressure condition duration at two ends greater than T8, and the switch time-delay T9 time closes a floodgate.
9. the protective device of power distribution network according to claim 8; the protected mode that it is characterized in that described power distribution network is set to main line protected mode, branch line protected mode and interconnection switch protected mode; the described logic control of described main line protected mode for the main line switch is correlated with; the described logic control of described branch line protected mode for a wiretap is correlated with, the described logic control of described interconnection switch protected mode for interconnection switch is correlated with.
10. the protective device of power distribution network according to claim 9 is characterized in that
The protection logic that described main line protected mode adopts comprises the protection of decompression separating brake, presses off the lock protection wink, the protection of locking separating brake, voltage protection type come ballast to close a floodgate, the current protection type comes ballast combined floodgates, three sections current protections (specified time), accelerate detection failure current protection and PT burn out detection behind jumping protection, the reclosing;
The protection logic that described branch line protected mode adopts comprises the protection of decompression separating brake, presses off the lock protection wink, the protection of locking separating brake, voltage protection type come ballast to close a floodgate, the current protection type comes ballast combined floodgates, three sections current protections (specified time), accelerate detection failure current protection and PT burn out detection behind jumping protection, the reclosing;
The protection logic that described interconnection switch protected mode adopts comprises that both sides press off the protection of lock automatic closing, cyclization and drop into that surrender is protected, a side decompression is hauled oneself willingly into protection and press off the lock protection wink.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210394638.9A CN102904228B (en) | 2012-10-17 | 2012-10-17 | A kind of guard method of power distribution network and protective device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210394638.9A CN102904228B (en) | 2012-10-17 | 2012-10-17 | A kind of guard method of power distribution network and protective device |
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| Publication Number | Publication Date |
|---|---|
| CN102904228A true CN102904228A (en) | 2013-01-30 |
| CN102904228B CN102904228B (en) | 2016-02-24 |
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| CN201210394638.9A Expired - Fee Related CN102904228B (en) | 2012-10-17 | 2012-10-17 | A kind of guard method of power distribution network and protective device |
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|---|---|---|---|---|
| CN105024361A (en) * | 2015-04-16 | 2015-11-04 | 扬州科宇电力有限公司 | On-site feeder automatic protection method and application thereof |
| CN106340860A (en) * | 2016-10-13 | 2017-01-18 | 安徽翔龙电气有限公司 | Method for determining feedback protection control of distribution network automatic terminal on the basis of current signals |
| CN106370977A (en) * | 2016-08-23 | 2017-02-01 | 成都翼高九天科技有限公司 | Unmanned aerial vehicle ground station based power distribution network breakdown detection method |
| CN107026431A (en) * | 2017-03-13 | 2017-08-08 | 全球能源互联网研究院 | The fault detection method and device of region AC/DC interconnected system |
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| CN110988532A (en) * | 2019-11-29 | 2020-04-10 | 广西电网有限责任公司电力科学研究院 | Protection logic test system of distribution automation terminal |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6002260A (en) * | 1997-09-23 | 1999-12-14 | Pacific Gas & Electric Company | Fault sensor suitable for use in heterogenous power distribution systems |
| CN102332710A (en) * | 2011-09-04 | 2012-01-25 | 金昌平 | High-performance voltage timelike distribution automation terminal |
| CN202145565U (en) * | 2011-07-29 | 2012-02-15 | 成都智达电力自动控制有限公司 | Modular system structure used in distribution network terminal |
| CN102593798A (en) * | 2012-02-21 | 2012-07-18 | 南京因泰莱配电自动化设备有限公司 | Comprehensive relay protection method applied to intelligent switch |
-
2012
- 2012-10-17 CN CN201210394638.9A patent/CN102904228B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6002260A (en) * | 1997-09-23 | 1999-12-14 | Pacific Gas & Electric Company | Fault sensor suitable for use in heterogenous power distribution systems |
| CN202145565U (en) * | 2011-07-29 | 2012-02-15 | 成都智达电力自动控制有限公司 | Modular system structure used in distribution network terminal |
| CN102332710A (en) * | 2011-09-04 | 2012-01-25 | 金昌平 | High-performance voltage timelike distribution automation terminal |
| CN102593798A (en) * | 2012-02-21 | 2012-07-18 | 南京因泰莱配电自动化设备有限公司 | Comprehensive relay protection method applied to intelligent switch |
Non-Patent Citations (1)
| Title |
|---|
| 张丽晶: "《电压型馈线自动化的研究及其应用》", 《中国优秀硕士学位论文全文数据库》 * |
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| CN106340860A (en) * | 2016-10-13 | 2017-01-18 | 安徽翔龙电气有限公司 | Method for determining feedback protection control of distribution network automatic terminal on the basis of current signals |
| CN107026431B (en) * | 2017-03-13 | 2019-01-08 | 全球能源互联网研究院有限公司 | The fault detection method and device of region AC/DC interconnected system |
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| CN110148930B (en) * | 2019-06-21 | 2021-02-26 | 石家庄科林电气股份有限公司 | Method for fault location and automatic topology identification in power distribution network |
| CN110401177A (en) * | 2019-06-26 | 2019-11-01 | 长安大学 | A kind of 10KV line protective devices and its application method |
| CN110635460B (en) * | 2019-10-17 | 2022-04-08 | 许继集团有限公司 | On-site feeder automation device, section switch and interconnection switch |
| CN110635460A (en) * | 2019-10-17 | 2019-12-31 | 许继集团有限公司 | On-site feeder automation device, section switch and interconnection switch |
| CN110988532A (en) * | 2019-11-29 | 2020-04-10 | 广西电网有限责任公司电力科学研究院 | Protection logic test system of distribution automation terminal |
| CN116593762A (en) * | 2023-07-17 | 2023-08-15 | 烟台东方威思顿电气有限公司 | In-situ feeder automatic instantaneous voltage detection method |
| CN116593762B (en) * | 2023-07-17 | 2023-09-08 | 烟台东方威思顿电气有限公司 | In-situ feeder automatic instantaneous voltage detection method |
| CN117439033A (en) * | 2023-12-19 | 2024-01-23 | 成都天合一成科技服务有限公司 | System for preventing loop closing misoperation based on real-time data of transformer substation |
| CN117439033B (en) * | 2023-12-19 | 2024-05-14 | 成都天合一成科技服务有限公司 | System for preventing loop closing misoperation based on real-time data of transformer substation |
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