CN102904331B - Wide area self-adaptation spare power automatic switching method based on synchronous phasor measurement - Google Patents

Wide area self-adaptation spare power automatic switching method based on synchronous phasor measurement Download PDF

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CN102904331B
CN102904331B CN201210359469.5A CN201210359469A CN102904331B CN 102904331 B CN102904331 B CN 102904331B CN 201210359469 A CN201210359469 A CN 201210359469A CN 102904331 B CN102904331 B CN 102904331B
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China
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bus
restored
power supply
area
electricity
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CN201210359469.5A
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Chinese (zh)
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CN102904331A (en
Inventor
高昌培
王宇恩
戴宇
林虎
白加林
时伯年
秦红霞
王学博
石景海
张志强
姚斌
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贵州电网公司电力调度控制中心
北京四方继保自动化股份有限公司
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Abstract

The invention discloses a wide area self-adaptation spare power automatic switching method based on synchronous phasor measurement. By means of topology analysis, an association relationship between buses and lines is determined, a mode of operation of the lines and the buses is recognized, an initial operation state is recorded, faulty area, normal power supply area and area to be restored are determined, whether small power sources in a regional power grid are required to be immediately removed or not is determined, if the small power sources in the regional power grid are not required to be immediately removed, a spare power automatic switching power source is subjected to a quasi-synchronization grid connection, otherwise, all small power circuit switches in the area to be restored are tripped off, all non-fault working power source switches in a power-loss area are tripped off, and power restoration process is completed through circularly searching for power supply buses to be restored and closed corresponding line switches. According to the wide area self-adaptation spare power automatic switching method based on the synchronous phasor measurement, a centralized decision-making coordination mode which is specific to the integrated power grid is utilized so that a novel spare power automatic switching method has the advantages that the wide area is achieved, the method is capable of being self-adaptive to operation mode and the small power sources access to the power grid.

Description

A kind of wide area self adaptation spare power automatic switching method based on synchronous phasor measurement
Technical field
The invention belongs to power system automatic field, relate more specifically to a kind of wide area self adaptation spare power automatic switching method based on synchronous phasor measurement.
Background technology
Along with socioeconomic development, electrical network scale expanding day, electric network composition becomes increasingly complex, and user is also more and more higher to the q&r of power supply.In modern power network, for meeting economy, the reliability service of electrical network, power network wiring is generally taked closed loop design, open loop operation, especially 110kV electrical network design all the more so.Therefore, configuration automatic throw-in equipment of emergency power supply (abbreviation prepared auto restart) widely adopts as improving the effective means of power supply reliability.For example, at least two electric power incoming lines of Yi Zuo 110kV transformer station configuration, are powered to whole transformer station by an electric power incoming line while normally moving, the switch of an other electric power incoming line in open position as stand-by heat.When working power dead electricity, backup auto-activating device tripping working power immediately switch, the Backup Power Switch of closing, restores electricity rapidly, thereby improves the reliability of power supply.
The information of conventional prepared auto restart based on the spot, the transformer station stand-by power supply automatic Input of solution in open loop point, existence cannot adapt to the problem that power system operating mode changes, such as, under single supply serial electric power thus supplied, may cause dead electricity region to restore electricity in time.Meanwhile, due to the limitation of information, prepared auto restart control strategy cannot be realized the cooperation of the prepared auto restart between different plant stands on the spot.Therefore need to take a kind ofly for coordination mode electrical network integral body, centralized decision-making, realize novel spare power automatic switching method wide scope, that can be adaptive to operational mode.
In addition, conventional prepared auto restart only judges whether the circuit of Switching power supply conventionally according to the voltage of main line, and in electrical network actual moving process, much 110kV transformer station is connected to the small power supply that capacity does not wait.After inlet wire tripping, cause the lonely network operation of 110kV and following electrical network, there is the weak support of voltage, frequency.Like this, for the system that has small power supply access, will make bus criterion with no pressure lose efficacy, cause backup auto-activating device tripping.In addition,, due to the existence of small power supply, in-put of spare power supply may produce " small power supply and large electrical network non-Switching Synchronization " and impact.Therefore, common practice is that small power supply is taked to the mode of excising immediately at present, as long as exist small power supply to excise, thereby must cause bus loss of pressure at least in short-term.
And in fact, at online small power supply with load on the spot in the situation that in a basic balance, when there is working power fault trip, if frequency dimension is held in normal range (NR) (such as 49.5 ~ 50.5Hz), when busbar voltage maintains acceptable scope (such as more than 90%), show that lonely net system can stable operation, now can take to examine simultaneous interconnecting mode and make lonely net system grid-connected.Correspondingly, need a kind ofly can to adapt to small power supply operational mode, can complete the inspection novel spare power automatic switching method of the same period.
In recent years; synchronized phasor measurement technology has been obtained and has been developed rapidly; it gathers the real time execution parameter (comprising amplitude, phase place, frequency, frequency change rate, active power, reactive power etc.) of the Wide Area Power by high-precise synchronization; the multidate information of the electrical network overall situation is provided; not only in electrical network wide area monitoring field, obtain extensive use, and also start to promote gradually at electrical network wide area protection and control field.Controlling center is by accepting the synchronous phasor measurement result of substation with 10ms or 20ms interval, according to system status and failure condition, carry out decision-making and issue control command to substation, can realize the functions such as line tripping (using amplitude and phase information to determine fault), DCgenerator motor field auxiliary adjustment or direct current power assisted modulation (using phase place or frequency information feedback tracking system vibration situation).
Summary of the invention
For overcoming the above-mentioned problems in the prior art; the present invention further expands the effect of synchronous phasor measurement and high speed communication on the basis of wide area protection platform; by centralized decision-making mode, realize the wide area self adaptation spare power automatic switching method based on synchronous phasor measurement.After working power disappears for some reason, wide area prepared auto restart can start rapidly, identify " dead electricity bus (dead electricity region) ", formulates prepared auto restart control strategy, sends control sequence order, disconnects working power, drops into stand-by power supply, improves the reliability of power supply.Simultaneously for the electrical network that contains small power supply, before prepared auto restart action, consider small power supply impact, when can supporting, small power supply under local load condition, gives full play to small power supply power supply function, avoid power failure, need to excise small power supply and take corresponding measure by judging whether, to guarantee power network safety operation after automatic closing success.
The present invention by the following technical solutions.
A wide area self adaptation spare power automatic switching method based on synchronous phasor measurement, is characterized in that, said method comprising the steps of:
(1) regional power grid is carried out to Analysis of Topological Structure, the incidence matrices of generatrix and circuit, matrix element is that 1 this bus of expression is connected with this circuit, matrix element is 0 and represents that this bus is not connected with this circuit;
(2) identification circuit and bus running manner record switch initial condition; If busbar voltage is greater than definite value and is judged as and puts into operation, otherwise for stopping transport; According to line switching state, judge whether circuit puts into operation, if circuit two end switch be closure circuit for putting into operation, otherwise think in shut down condition;
(3) after transformer station's working power fault trip, in conjunction with the topological structure of electrical network, identification fault zone, normal power supply region and territory, area to be restored;
(4) in the electrical network of judging area, whether there is small power supply, if there is small power supply to go to step (5); If go to step (8) without small power supply, territory, area to be restored is dead electricity region;
(5) according to following method, judge whether to excise immediately small power supply, if do not need, excise immediately small power supply and go to step (6), if desired excise immediately small power supply and go to step (7);
5.1 working power fault trips occur after the first predetermined instant T1, initial power vacancy size delta P> definite value Dpset in territory, area to be restored, or in the territory, area to be restored constantly recording at this T1, frequency change rate df/dt is greater than definite value DFDTset, need to excise immediately small power supply, go to step (7), otherwise enter 5.2;
After 5.2 tripping operation faults occur, the second predetermined instant T2 to the is in three predetermined instant T3 times, if actual measurement voltage deviation Δ V is greater than definite value Dvset, or frequency deviation f is greater than definite value DFset, needs to excise immediately small power supply, goes to step (7), otherwise enters 5.3;
After 5.3 tripping operation faults occur, the 3rd predetermined instant T3 to the is in four predetermined instant T4 times, if actual measurement voltage deviation Δ V is greater than definite value DVset or practical frequency deviation is greater than definite value DFset, need to understand excision small power supply, go to step (7), otherwise enter step (6);
(6) utilize phase place, frequency and the frequency change rate information of the switch both sides in territory, contact area to be restored that synchronous phasor measurement obtains and normal power supply region to carry out accurate simultaneous interconnecting, then go to step (10);
(7) whole small power supply line switchings in territory, tripping area to be restored, territory, area to be restored becomes dead electricity region;
(8) whole non-fail operation mains switches in tripping dead electricity region;
(9) by circulation searching bus to be restored electricity, closed pair, answer line switching, complete the process of restoring electricity;
(10) wide area prepared auto restart control procedure finishes.
Beneficial effect of the present invention: the invention discloses a kind of wide area self adaptation spare power automatic switching method based on synchronous phasor measurement, the conventional prepared auto restart overcoming based on information is on the spot not enough, realize the prepared auto restart of the coordination of wide scope and control, the power supply of quick-recovery to load soon.For small power supply, can supply in the situation of local load simultaneously, be different from conventional prepared auto restart and still excise in this case the way of small power supply, adopt inspection simultaneous interconnecting mode, thereby guarantee the uninterrupted power supply to load, avoid user to cause damage.
Accompanying drawing explanation
Fig. 1 is wide area self adaptation spare power automatic switching method flow chart of the present invention.
Fig. 2 is the small power supply processing logic schematic diagram based on synchronous phasor measurement.
Fig. 3 is certain regional power grid structural representation.
Fig. 4 is wide area protection plateform system structure chart.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
Wide area self adaptation prepared auto restart logic based on synchronous phasor measurement is as Fig. 1, and its Small Power processing logic is as Fig. 2.Below in conjunction with regional power grid shown in Fig. 3, be that example describes.
Before fault, SD station and ZQ station provide supply access as main for circuit by L1, corresponding CB0, CB1, CB2, CB3, CB4, CB5 are all in co-bit, L3 provides stand-by channel as extension wire, and corresponding CB6 is in co-bit, CB7 in a minute position, and while normally moving, M1, M2, M3, M4 are all charged.L1 is because fault tripping, corresponding tripping CB0, CB1, and M1, M2, the equal dead electricity of M3 when without small power supply, and conventional prepared auto restart possibly cannot move and the CB7 that need to manually close could restore electricity to M3.
The wide area protection platform that this regional power grid is equipped with is as Fig. 4, and this platform is comprised of 1 main website and some substations, between main website and substation, by 2M designated lane, is connected.The input that comprises analog quantity, intake etc. is processed in the substation that is wherein arranged on each transformer station by synchronous phasor measurement unit, by controlling performance element, carry out trip signal, by communication interface and main website, communicates.Main website accepts the synchronous phasor measurement result of substation by communication interface, by Control Server, carry out centralized decision-making, by communication interface, by control command, gives substation.
Each link specific design step of the inventive method is as follows:
Step 1, topological analysis are determined bus and circuit incidence relation.
For supply access being provided to the non-fault bus in power failure state, first regional power grid is carried out to Analysis of Topological Structure, the incidence matrices of generatrix and circuit, matrix element is that 1 this bus of expression is connected with this circuit, matrix element is 0 and represents that this bus is not connected with this circuit.Bar coupler (abbreviation mother) is processed as circuit.
In the present embodiment, according to topological analysis, can be as the incidence matrices of Down Highway and circuit:
Switch initial condition is identified and recorded to step 2, circuit and bus running manner.
Electrical network normally moves under unfaulty conditions, is greater than definite value and is judged as and puts into operation, and record bus put into operation state (1 represents to put into operation, and 0 represents to stop transport) and Reflector (0 expression fault-free, 1 indicates fault) according to busbar voltage.According to line switching state, (1 is co-bit, 0 is a minute position) judge whether circuit puts into operation, circuit two end switch are 1 circuit for putting into operation, and record circuit puts into operation, and (1 represents to put into operation state, 0 represents to stop transport) and Reflector (0 represents fault-free, and 1 indicates fault).Mother processing mode is with circuit processing mode, according to bus connection switch state, (1 is co-bit, 0 is a minute position) judge whether mother puts into operation, bus connection switch state is that 1 mother is for putting into operation, and record mother and put into operation that (1 represents to put into operation state, 0 represents to stop transport) and Reflector (0 represents fault-free, and 1 indicates fault).
In the present embodiment, bus M1, M2, M3, the M4 state of putting into operation are 1, and Reflector is 0; Circuit L1, the L2 state of putting into operation are 1, and Reflector is 0; Circuit L3 puts into operation and is masked as 0, and Reflector is 0; The mother CB2 state of putting into operation is 1, and Reflector is 0.
Step 3, fault detect and fault zone, normal power supply region and the judgement of territory, area to be restored.
Only consider single plant stand bus and the associated circuitry difference that whether breaks down with conventional prepared auto restart, wide area prepared auto restart should be considered working power fault in the regional extent of controlling.
After working power fault trip, in conjunction with network topology analysis, identification fault zone, normal power supply region and territory, area to be restored.
3.1 based on wide area protection platform, uses trip protection signal identification fault bus or faulty line;
In the present embodiment, circuit L1 breaks down, and according to protection actuating signal, failure judgement position is L1.
3.2 determine that fault zone is fault bus and associated circuit (during busbar fault) or faulty line itself (during line fault) thereof, upgrade the Reflector (becoming 1 from 0) of element in fault zone;
In the present embodiment, fault zone is L1, and this line fault sign becomes 1 from 0.
3.3 determine the part of normal power supply region for still keeping being connected with major network;
In the present embodiment, normal power supply region is except L1, M1, CB2, M2, L2, M3, outer other regions of L3.
3.4 combined circuit switch motion situations, determine that territory, area to be restored is for isolated island network from original normal power supply network, upgrade the bus state (becoming 0 from 1) that puts into operation.
In the present embodiment, territory, area to be restored is by M1, CB2, and M2, L2, M3, M1 is upgraded in the region that L3 forms simultaneously, M2, the state that puts into operation of M3 becomes 0 from 1.
In step 4, judging area electrical network, whether there is small power supply, if there is small power supply to go to step five; If go to step eight without small power supply, territory, area to be restored is dead electricity region in such cases.
In the present embodiment, M1, small power supply is all accessed at the SD station at M2 place and the ZQ station at M3 place, and therefore going to step five carries out small power supply analyzing and processing.
Step 5, carry out the small power supply analyzing and processing based on synchronous phasor measurement, judge whether to excise immediately small power supply, if do not need, excise immediately small power supply and go to step six, if desired excise immediately small power supply and go to step seven.As shown in Figure 2, concrete steps are as follows for small power supply analyzing and processing logic based on synchronous phasor measurement:
After 5.1 tripping operation faults occur, T1 constantly, according to frequency change rate df/dt size in the territory, area to be restored that in territory, area to be restored, initial power vacancy size delta P and T1 record constantly, if Δ P> definite value DPset or df/dt are greater than definite value DFDTset, show that power shortage is excessive, can not meet lonely network operation requirement, need connection fast to cut small power supply, go to step seven, otherwise go to step 5.2; T1 is preferably 0.1s, and DPset is preferably 10%, DFDTset and is preferably 1Hz/s.
In the present embodiment, according to the size of frequency change rate df/dt in power shortage size delta P and 0.1s, in conjunction with the two in the relation of not considering in change in voltage situation,
ΔP = 2 H * df dt / f 0
Wherein H is equivalent unit inertia, f 0for electrical network rated frequency (50Hz).Get the equivalent inertia canonical parameter of regional power grid 2.5s, when df/dt=1Hz/s, have Δ P=2*2.5*1/50=10%.
If frequency change rate is greater than 1Hz/s, show that power shortage is excessive, need take fast to control, connection is cut small power supply.
After 5.2 tripping operation faults occur T2 constantly to T3 constantly in, voltage course enters stable state, according to power shortage size delta P and actual measurement voltage deviation Δ V, estimate the frequency deviation f entering after stable state, if being greater than definite value DVset or estimating frequency departure, actual measurement voltage deviation is greater than definite value DFset, go to step seven, otherwise go to step 5.3.
T2 is preferably 1s, and T3 is preferably 10s, and DVset is preferably 5%, DFset and is preferably 0.5Hz.
In the present embodiment, in 1s ~ 10s, according to power shortage size delta P and actual measurement voltage deviation Δ V, estimate the frequency deviation f entering after stable state, by the corresponding relation of power shortage and voltage deviation and frequency departure
ΔP=k fΔf+k vΔV
K wherein ffor LOAD FREQUENCY regulates effect coefficient, k vfor load voltage regulates effect coefficient.Have
Δf=(ΔP-k vΔV)/k f
As Δ P=10%, Δ V=4%, k f=2, k v=2, there is Δ f=1%, estimate frequency and will be stable at 49.5Hz position, in system operation tolerance interval, go to step 5.3.
After 5.3 tripping operation faults occur T3 constantly in to T4 constantly in, voltage course and frequency process all enter stable state, if actual measurement voltage deviation is greater than definite value DVset or practical frequency deviation is greater than definite value DFset, go to step seven, otherwise go to step six.T4 is preferably 15s.
In the present embodiment, whether 10s ~ 15s phase III frequency, voltage all enter stable state, by real-time the detection frequency of occurrences or voltage out-of-limit, determine whether to need connection to cut, if desired connection is cut and is gone to step seven, otherwise within 15 seconds, go to step six after (system enters stable state), takes to examine simultaneous interconnecting mode.
Step 6, utilize phase place, frequency and the frequency change rate information of the switch both sides that synchronous phasor measurement obtains to examine simultaneous interconnecting, go to step ten.
Because current small power supply goes out lonely net and major network may exist certain frequency difference, therefore adopt to catch accurate synchronizing mode and close a floodgate, difference frequency is grid-connected.
Phase difference, difference on the frequency, frequency change rate variance and the combined floodgate leading time when the preceding switch both sides (being territory, area to be restored side and normal power supply area side) that according to synchronous phasor measurement, provide, calculate this and constantly send out the order of closing a floodgate to angular error corresponding to the actual closing moment of switch
Wherein: Δ δ 1212for working as preceding switch both sides phase difference; Δ f 12=f 1-f 2for working as preceding switch both sides difference on the frequency; for working as preceding switch both sides frequency change rate variance; Tpred is leading time (considering that device exit relay moves the required time of breaker closing); Subscript 1 and 2 represents respectively territory, area to be restored side and normal power supply area side.As the angular error δ calculating errbe less than definite value DeltaError and carry out the order of closing a floodgate.DeltaError is preferably 0.1 °.
In the present embodiment, M1, M2, M3 form lonely network operation, and phase difference, difference on the frequency, the frequency change rate variance of the A phase voltage by sense switch CB7 both sides (having represented respectively normal power supply area side and territory, area to be restored side), as the δ calculating errin the time of <0.1 °, by the control sub-station that is positioned at LB station, send the order of closing a floodgate.
Whole small power supply line switchings in step 7, territory, tripping area to be restored.
Whole small power supply line switchings in territory, tripping area to be restored, now territory, area to be restored becomes dead electricity region owing to losing small power supply to the support of voltage and frequency.
In the present embodiment, when small power supply is not enough to support voltage and frequency, by being positioned at the control sub-station at SD station and being positioned at the whole tripping small power supply of the control sub-station switch that ZQ stands, the territory, area to be restored that M1, M2, M3 form becomes dead electricity region.
Whole non-fail operation mains switches in step 8, tripping dead electricity region, the record circuit state variation (becoming 0 from 1) that puts into operation.
Whole non-fail operation mains switches in tripping dead electricity region, for next step circulation drops into bus and circuit provides basis.
In the present embodiment, by the control sub-station tripping CB2 and the CB3 that are positioned at SD station, by the control sub-station tripping CB4 and the CB6 that are positioned at ZQ station.The state variation that puts into operation that simultaneously records L2 and CB2 becomes 0 from 1.
Step 9, by circulation searching bus to be restored electricity, close corresponding line switch, complete the process of restoring electricity.Concrete steps are as follows:
9.1 be 0 according to the bus state of putting into operation in dead electricity region, generate bus queue to be restored electricity;
9.2 check whether bus queue to be restored electricity is empty, if not sky is selected bus queue head of the queue bus to be restored electricity, is bus current to be restored electricity, and turns 9.3; Go to step ten if it is empty;
9.3 judgement bus associated circuitry current to be restored electricity is to side bus put into operation state and associated circuitry Reflector, if to the side bus state of putting into operation be 1 and associated circuitry Reflector be 0, turn 9.4; If to the side bus state of putting into operation be 0 or associated circuitry Reflector be 1, turn 9.5;
The 9.4 bus associated circuitry switches current to be restored electricity that close, upgrade the state that puts into operation (becoming 1 from 0) of bus current to be restored electricity, and turn 9.1;
9.5 delete bus current to be restored electricity from queue, and selecting next bus in queue is new bus current to be restored electricity, and judge that whether queue is empty, turns 9.1, if it is empty if not sky turns 9.3;
In the present embodiment, first generating queue to be recovered is M1->M2->M3.
This queue non-NULL, selecting M1 is bus current to be restored electricity.M1 is 1 to the side bus M0 state of putting into operation, but associated circuitry L1 Reflector is 1, does not meet recovery condition; M1 is 0 to the side bus M2 state of putting into operation, and does not meet recovery condition.Therefore from queue, delete M1, queue becomes M2->M3.
Selecting M2 is bus current to be restored electricity.M2 is 0 to the side bus M1 state of putting into operation, and does not meet recovery condition; M2 is 0 to the side bus M3 state of putting into operation, and does not meet recovery condition.Therefore from queue, delete M2, queue becomes M3.
Selecting M3 is bus current to be restored electricity.M3 is 0 to the side bus M2 state of putting into operation, and does not meet recovery condition; M3 is 1 to the side bus M4 state of putting into operation, and associated circuitry L3 Reflector is 0, meets recovery condition.Therefore close CB6 and CB7, modification M3 puts into operation and is masked as 1, deletes M3 from queue, and queue is empty.
Regenerating queue to be recovered is M1->M2.
This queue non-NULL, selecting M1 is bus current to be restored electricity.M1 is 1 to the side bus M0 state of putting into operation, but associated circuitry L1 Reflector is 1, does not meet recovery condition; M1 is 0 to the side bus M2 state of putting into operation, and does not meet recovery condition.Therefore from queue, delete M1, queue becomes M2.
Selecting M2 is bus current to be restored electricity.M2 is 0 to the side bus M1 state of putting into operation, and does not meet recovery condition; M2 is 1 to the side bus M3 state of putting into operation, and associated circuitry L2 Reflector is 0, meets recovery condition.Therefore close CB3 and CB4, modification M2 puts into operation and is masked as 1, deletes M2 from queue, and queue is empty.
Regenerating queue to be recovered is M1.
This queue non-NULL, selecting M1 is bus current to be restored electricity.M1 is 1 to the side bus M0 state of putting into operation, but associated circuitry L1 Reflector is 1, does not meet recovery condition; M1 is 1 to the side bus M2 state of putting into operation, and associated mother CB2 Reflector is 0, meets recovery condition.Therefore close CB2, modification M1 puts into operation and is masked as 1, deletes M1 from queue, and queue is empty.
Regenerate queue to be recovered for empty.Go to step ten, finish whole control procedure.
Step 10, wide area prepared auto restart control procedure finish.
The present patent application people has done detailed explanation and description in conjunction with Figure of description to embodiments of the invention; but those skilled in the art should understand that; above embodiment is only the preferred embodiments of the invention; detailed explanation is just in order to help reader to understand better spirit of the present invention; and be not limiting the scope of the invention; on the contrary, within any any improvement of doing based on invention spirit of the present invention or modification all should drop on protection scope of the present invention.

Claims (5)

1. the wide area self adaptation spare power automatic switching method based on synchronous phasor measurement, is characterized in that, said method comprising the steps of:
(1) regional power grid is carried out to Analysis of Topological Structure, the incidence matrices of generatrix and circuit, matrix element is that 1 this bus of expression is connected with this circuit, matrix element is 0 and represents that this bus is not connected with this circuit;
(2) identification circuit and bus running manner record switch initial condition; If busbar voltage is greater than definite value and is judged as and puts into operation, otherwise for stopping transport; According to line switching state, judge whether circuit puts into operation, if circuit two end switch be closure circuit for putting into operation, otherwise think in shut down condition;
(3) after transformer station's working power fault trip, in conjunction with the topological structure of electrical network, identification fault zone, normal power supply region and territory, area to be restored;
(4) in the electrical network of judging area, whether there is small power supply, if there is small power supply to go to step (5); If go to step (8) without small power supply, territory, area to be restored is dead electricity region;
(5) according to following method, judge whether to excise immediately small power supply, if do not need, excise immediately small power supply and go to step (6), if desired excise immediately small power supply and go to step (7);
5.1 working power fault trips occur after the first predetermined instant T1, initial power vacancy size △ P> definite value DPset in territory, area to be restored, or in the territory, area to be restored constantly recording at this T1, frequency change rate df/dt is greater than definite value DFDTset, need to excise immediately small power supply, go to step (7), otherwise enter 5.2;
After 5.2 tripping operation faults occur, the second predetermined instant T2 to the is in three predetermined instant T3 times, if actual measurement voltage deviation △ V is greater than definite value DVset, or estimates frequency departure △ f and be greater than definite value DFset, need to excise immediately small power supply, go to step (7), otherwise enter 5.3;
5.3 the 3rd predetermined instant T3 to the is in four predetermined instant T4 times after tripping operation fault occurs, if actual measurement voltage deviation △ V is greater than definite value DVset or practical frequency deviation is greater than definite value DFset, need to excise immediately small power supply, go to step (7), otherwise enter step (6);
(6) utilize phase place, frequency and the frequency change rate information of the switch both sides in territory, contact area to be restored that synchronous phasor measurement obtains and normal power supply region to carry out accurate simultaneous interconnecting, then go to step (10);
(7) whole small power supply line switchings in territory, tripping area to be restored, territory, area to be restored becomes dead electricity region;
(8) whole non-fail operation mains switches in tripping dead electricity region;
(9) by circulation searching bus to be restored electricity, closed pair, answer line switching, complete the process of restoring electricity;
(10) wide area prepared auto restart control procedure finishes.
2. the wide area self adaptation spare power automatic switching method based on synchronous phasor measurement according to claim 1, is characterized in that:
In step (5), wherein estimate frequency departure △ f and calculated by following formula:
△f=(△P-k v△V)/k f
In formula, △ P is the second predetermined instant T2 to the three predetermined instant T3 time internal power vacancy sizes, and △ V is actual measurement voltage deviation, k ffor LOAD FREQUENCY regulates effect coefficient, k vfor load voltage regulates effect coefficient.
3. the wide area self adaptation spare power automatic switching method based on synchronous phasor measurement according to claim 2, is characterized in that:
Preferred k f=2, k v=2.
4. the wide area self adaptation spare power automatic switching method based on synchronous phasor measurement according to claim 1, is characterized in that: in step (9), specifically adopt the following methods engineering that restores electricity:
9.1 line up bus queue to be restored electricity by bus in dead electricity region;
9.2 check whether bus queue to be restored electricity is empty, if not sky is selected bus queue head of the queue bus to be restored electricity, is bus current to be restored electricity, and turns 9.3; Go to step if it is empty (10);
9.3 judgement bus associated circuitry current to be restored electricity, to side bus put into operation state and associated circuitry Reflector, if bus associated circuitry current to be recovered puts into operation to side bus and associated circuitry fault-free, turns 9.4; If bus associated circuitry offside Generatrix cease current to be recovered or associated circuitry are malfunction, turn 9.5;
The 9.4 bus associated circuitry switches current to be restored electricity that close, upgrade the state that puts into operation of bus current to be restored electricity, and turn 9.1;
9.5 delete bus current to be restored electricity from described bus queue, and selecting next bus in described bus queue is up-to-date bus current to be restored electricity, and judge that whether queue is empty, goes to step 9.1, if it is empty if not sky turns 9.3.
5. the wide area self adaptation spare power automatic switching method based on synchronous phasor measurement according to claim 1, is characterized in that: in described step (5), T1 is preferably 0.1s, and DPset is preferably 10%, DFDTset and is preferably 1Hz/s;
T2 is preferably 1s, and T3 is preferably 10s, and T4 is preferably 15s, and DVset is preferably 5%, DFset and is preferably 0.5Hz.
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Publication number Priority date Publication date Assignee Title
CN103427484B (en) * 2013-09-02 2016-04-20 国家电网公司 A kind of centralized area power grid prepared auto restart control method
CN103607038B (en) * 2013-11-25 2015-06-24 广东电网公司电力调度控制中心 Method for implementing serial power supplying of multistage spare power automatic switching devices in power grid
CN104092288B (en) * 2014-07-25 2016-06-15 云南电网公司 The spare power automatic switching method of intelligent substation and device
CN104300680B (en) * 2014-10-13 2016-04-13 华中科技大学 Towards protection intelligent centre system and the cold and hot standby mode system of selection thereof of transformer station
CN106469941A (en) * 2016-11-17 2017-03-01 贵州电网有限责任公司贵阳供电局 It is applied to the wide area spare power automatic switching system intelligent control method of small power station's rich region
CN106771848B (en) * 2016-11-22 2019-01-29 华中科技大学 A kind of electric network failure diagnosis method based on the fusion of topological primitive information
CN107612021B (en) * 2017-08-30 2020-04-10 云南电网有限责任公司临沧供电局 Regional spare power automatic switching control method suitable for large number of small power supplies to access local power grid

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2253933C1 (en) * 2003-09-01 2005-06-10 Джус Илья Николаевич Method for controlling uninterruptible power system switch
CN101951016A (en) * 2010-04-22 2011-01-19 广东电网公司 Wide area information-based automatic standby power supply switching adaptive modeling and controlling method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2253933C1 (en) * 2003-09-01 2005-06-10 Джус Илья Николаевич Method for controlling uninterruptible power system switch
CN101951016A (en) * 2010-04-22 2011-01-19 广东电网公司 Wide area information-based automatic standby power supply switching adaptive modeling and controlling method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
《地区电网广域备自投控制系统研制》;余涛等;《电力自动化设备》;20110331;第31卷(第3期);第121-125页 *
余涛等.《地区电网广域备自投控制系统研制》.《电力自动化设备》.2011,第31卷(第3期),第121-125页.

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