CN102904331A - 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 PDFInfo
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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
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 the user is also more and more higher to the q﹠r of power supply.In modern power network, be economy, the reliability service that satisfies 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 the effective means that improves power supply reliability.For example, at least two electric power incoming lines of a 110kV transformer station configuration are powered to whole transformer station by an electric power incoming line when normally moving, and the switch of an other electric power incoming line is in open position as stand-by heat.When the working power dead electricity, immediately tripping working power of backup auto-activating device switch, the Backup Power Switch of closing restores electricity rapidly, thereby improves power supply reliability.
Conventional prepared auto restart is based on the spot information, solution is in the automatic Input of transformer station's stand-by power supply of open loop point, existence can't adapt to the problem that power system operating mode changes, such as, may cause the dead electricity zone in time to restore electricity under the single supply serial electric power thus supplied.Simultaneously, because the limitation of information, the prepared auto restart control strategy can't be realized the cooperation of the prepared auto restart between the different factories station 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 usually according to the voltage of main line, and in the electrical network actual moving process, a lot of 110kV transformer stations are connected to the small power supply that capacity does not wait.After the inlet wire tripping, cause the lonely network operation of 110kV and following electrical network, the weak support of voltage, frequency appears.Like this, for the system that the small power supply access is arranged, will so that bus with no pressure criterion lost efficacy, cause the backup auto-activating device tripping.In addition, because 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 the mode of excising immediately at present, as long as exist small power supply namely to excise, thereby must cause bus loss of pressure at least in short-term.
And in fact, in the situation that online small power supply and load on the spot in a basic balance, when the working power fault trip occurs when, if frequency dimension is held in the normal range (NR) (such as 49.5 ~ 50.5Hz), when busbar voltage maintains acceptable scope (such as more than 90%), show that then lonely net system can stable operation, can take to examine the simultaneous interconnecting mode this moment is incorporated into the power networks lonely net system.Correspondingly, then need a kind ofly can to adapt to the small power supply operational mode, can finish 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 obtain extensive use in electrical network wide area monitoring field, and also begin 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, make a strategic decision and issue control command to the substation according to system status and failure condition, 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 and 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 the centralized decision-making mode, realize the wide area self adaptation spare power automatic switching method based on synchronous phasor measurement.After working power disappeared for some reason, the wide area prepared auto restart can start rapidly, identify " dead electricity bus (dead electricity zone) ", formulates the prepared auto restart control strategy, sends the control sequence order, disconnects working power, drops into stand-by power supply, improves power supply reliability.Simultaneously for the electrical network that contains small power supply, before the prepared auto restart action, consider the small power supply impact, when can supporting, small power supply gives full play to the small power supply power supply function under the local load condition, avoid power failure, need excision small power supply and take corresponding measure by judging whether, to guarantee power network safety operation after the automatic closing success.
The present invention by the following technical solutions.
A kind of 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 Analysis of Topological Structure, the incidence matrices of generatrix and circuit, matrix element are that 1 this bus of expression links to each other with this circuit, and matrix element is that 0 this bus of expression does not link to each other with this circuit;
(2) identification circuit and bus running manner and record the switch initial condition; If busbar voltage then is judged as greater than definite value and puts into operation, otherwise for stopping transport; Judge according to the line switching state whether circuit puts into operation, if circuit two end switch be closure then circuit otherwise think and be in shut down condition for putting into operation;
(3) behind transformer station's working power fault trip, in conjunction with the topological structure of electrical network, identification fault zone, normal power supply zone and territory, area to be restored;
(4) whether there is small power supply in the judging area electrical network, if there is small power supply then to turn step (5); If then turn step (8) without small power supply, the territory, area to be restored is the dead electricity zone;
(5) judge whether to excise immediately small power supply according to following method, then do not turn step (6) if do not need to excise immediately small power supply, then turn step (7) if need to excise immediately small power supply;
After 5.1 the first predetermined instant T1 occurs in the working power fault trip, initial power vacancy size delta P in the territory, area to be restored〉definite value Dpset, perhaps in the territory, area to be restored that this T1 records constantly frequency change rate df/dt greater than definite value DFDTset, then need to excise immediately small power supply, turn step (7), otherwise enter 5.2;
After 5.2 the tripping operation fault occurs in the three predetermined instant T3 times of the second predetermined instant T2 to the, if actual measurement voltage deviation Δ V greater than definite value Dvset, or frequency deviation f then needs to excise immediately small power supply greater than definite value DFset, turns step (7), otherwise enters 5.3;
5.3 the tripping operation fault occured in the rear four predetermined instant T4 times of the 3rd predetermined instant T3 to the, if actual measurement voltage deviation Δ V greater than definite value DVset or practical frequency deviation greater than definite value DFset, then need to understand excision small power supply, turn 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 zone to carry out accurate simultaneous interconnecting, then turn step (10);
(7) whole small power supply line switchings in the territory, tripping area to be restored, the territory, area to be restored becomes the dead electricity zone;
(8) whole non-fail operation mains switches in the tripping dead electricity zone;
(9) answer line switching by circulation searching bus to be restored electricity, closed pair, finish 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, overcome based on the conventional prepared auto restart of information on the spot not enough, realize the prepared auto restart control of the coordination of wide scope, quick-recovery is to the power supply of load soon.Can supply in the situation of local load for small power supply simultaneously, be different from the way that conventional prepared auto restart still excises small power supply in this case, adopt inspection simultaneous interconnecting mode, thereby guarantee the uninterrupted power supply of load is avoided the user is caused damage.
Description of drawings
Fig. 1 is wide area self adaptation spare power automatic switching method flow chart of the present invention.
Fig. 2 is based on the small power supply processing logic schematic diagram of synchronous phasor measurement.
Fig. 3 is certain regional power grid structural representation.
Fig. 4 is wide area protection plateform system structure chart.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
Based on wide area self adaptation prepared auto restart logic such as Fig. 1 of synchronous phasor measurement, its Small Power processing logic such as Fig. 2.Be that example describes below in conjunction with regional power grid shown in Figure 3.
SD station and ZQ station provide supply access by L1 as the main supply circuit before the fault, corresponding CB0, CB1, CB2, CB3, CB4, CB5 all are in co-bit, L3 provides stand-by channel as extension wire, and corresponding CB6 is in co-bit, CB7 is in a minute position, and M1, M2, M3, M4 are all charged when normally moving.L1 is because the 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 can't move and the CB7 that need to manually close could restore electricity to M3.
Wide area protection platform such as Fig. 4 that this regional power grid is equipped with, this platform is comprised of 1 main website and some substations, links to each other by the 2M designated lane between main website and the substation.The input that comprises analog quantity, intake etc. is processed in the substation that wherein is installed in each transformer station by synchronous phasor measurement unit, carry out trip signal by the control performance element, communicates by communication interface and main website.Main website accepts the synchronous phasor measurement result of substation by communication interface, carry out centralized decision-making by Control Server, gives the substation by communication interface with control command.
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 for the non-fault bus that is in power failure state, at first regional power grid is carried out Analysis of Topological Structure, the incidence matrices of generatrix and circuit, matrix element are that 1 this bus of expression links to each other with this circuit, and matrix element is that 0 this bus of expression does not link to each other with this circuit.Bar coupler (abbreviation mother) is processed as circuit.
In the present embodiment, according to topological analysis, can be such as the incidence matrices of Down Highway and circuit:
Step 2, circuit and bus running manner identification and record switch initial condition.
Electrical network normally moves under the unfaulty conditions, and then be judged as greater than definite value according to busbar voltage and put into operation, and record bus put into operation state (1 expression puts into operation, and 0 expression is stopped transport) and Reflector (0 expression fault-free, 1 represents to have fault).(1 is co-bit according to the line switching state, 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 expression is stopped transport) and Reflector (0 expression fault-free, 1 expression has fault).The mother processing mode is with the circuit processing mode, (1 is co-bit according to the bus connection switch state, 0 is a minute position) judge whether mother puts into operation, the bus connection switch state is that 1 mother is for putting into operation, and the record mother puts into operation, and (1 expression puts into operation state, 0 expression is stopped transport) and Reflector (0 expression fault-free, 1 expression has 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 zone and territory, area to be restored are judged.
Only to consider whether single factory station bus and associated circuitry break down different with conventional prepared auto restart, and the wide area prepared auto restart should be considered the working power fault in the regional extent of control.
Behind the working power fault trip, in conjunction with the network topology analysis, identification fault zone, normal power supply zone and territory, area to be restored.
3.1 based on the wide area protection platform, use trip protection signal identification fault bus or faulty line;
In the present embodiment, circuit L1 breaks down, and according to the protection actuating signal, the failure judgement position is L1.
3.2 determine that the fault zone is fault bus and associated circuit (during busbar fault) or faulty line itself (during line fault) thereof, upgrade the Reflector (becoming 1 by 0) of element in the fault zone;
In the present embodiment, the fault zone is L1, and this line fault sign becomes 1 by 0.
3.3 determine the part of normal power supply zone for still keeping linking to each other with major network;
In the present embodiment, the normal power supply zone is for removing L1, M1, CB2, M2, L2, M3, outer other zones of L3.
3.4 combined circuit switch motion situation determines that the territory, area to be restored is isolated island network from original normal power supply network, upgrades the bus state (becoming 0 by 1) that puts into operation.
In the present embodiment, the territory, area to be restored is by M1, CB2, and M2, L2, M3, M1 is upgraded in the zone that L3 consists of simultaneously, M2, the state that puts into operation of M3 becomes 0 by 1.
Whether there is small power supply in step 4, the judging area electrical network, if there is small power supply then to turn step 5; If then turn step 8 without small power supply, the territory, area to be restored is the dead electricity zone 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 turning step 5 carries out the 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, then do not turn step 6 if do not need to excise immediately small power supply, then turn step 7 if need to excise immediately small power supply.Based on the small power supply analyzing and processing logic of synchronous phasor measurement as shown in Figure 2, concrete steps are as follows:
5.1 T1 constantly after the tripping operation fault occured, frequency change rate df/dt size in the territory, area to be restored that constantly records according to initial power vacancy size delta P and T1 in the territory, area to be restored, if Δ P〉definite value DPset or df/dt be greater than definite value DFDTset, show that then power shortage is excessive, can not satisfy lonely network operation requirement, need to join fast to cut small power supply, turn step 7, otherwise turn 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 the 0.1s, in conjunction with the two in the relation of not considering in the change in voltage situation,
Wherein H is equivalent unit inertia, f
0Be electrical network rated frequency (50Hz).Get the equivalent inertia canonical parameter of regional power grid 2.5s, Δ P=2*2.5*1/50=10% is then arranged when df/dt=1Hz/s.
If frequency change rate, shows then that power shortage is excessive greater than 1Hz/s, need take fast control, connection is cut small power supply.
After 5.2 the tripping operation fault occurs 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 that enters after the stable state, if the actual measurement voltage deviation is greater than definite value DVset or estimate frequency departure greater than definite value DFset, turn step 7, otherwise turn 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, according to power shortage size delta P and actual measurement voltage deviation Δ V, estimate the frequency deviation f that enters after the stable state, by the corresponding relation of power shortage and voltage deviation and frequency departure in 1s ~ 10s
ΔP=k
fΔf+k
vΔV
K wherein
fFor LOAD FREQUENCY is regulated effect coefficient, k
vFor load voltage is regulated effect coefficient.Then have
Δf=(ΔP-k
vΔV)/k
f
As Δ P=10%, Δ V=4%, k
f=2, k
v=2, Δ f=1% is then arranged, namely estimate frequency and will be stable at the 49.5Hz position, be in system's operation tolerance interval, turn step 5.3.
After 5.3 the tripping operation fault occurs T3 constantly in to T4 constantly in, voltage course and frequency process all enter stable state, if the actual measurement voltage deviation greater than definite value DVset or practical frequency deviation greater than definite value DFset, turn step 7, otherwise turn step 6.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, need to determine whether connection to cut, then turn step 7 if need connection to cut, take to examine the simultaneous interconnecting mode otherwise turned step 6 in 15 seconds after (system enters stable state).
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, turn step 10.
Because current small power supply goes out lonely net and may there be certain frequency difference in major network, therefore adopt to catch accurate synchronizing mode combined floodgate, namely difference frequency is incorporated into the power networks.
According to phase difference, difference on the frequency, frequency change rate variance and the combined floodgate leading time when preceding switch both sides (being territory, area to be restored side and normal power supply area side) that synchronous phasor measurement provides, 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
12=δ
1-δ
2For 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 the 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 that calculates
ErrThen carry out the order of closing a floodgate less than definite value DeltaError.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) are as the δ that calculates
ErrThen send the order of closing a floodgate by the control sub-station that is positioned at the LB station in the time of＜0.1 °.
Whole small power supply line switchings in step 7, the territory, tripping area to be restored.
Whole small power supply line switchings in the territory, tripping area to be restored, this moment, the territory, area to be restored became the dead electricity zone owing to losing the support of small power supply to voltage and frequency.
In the present embodiment, by the control sub-station that is positioned at the SD station and the whole tripping small power supply of the control sub-station switch that is positioned at the ZQ station, the territory, area to be restored that M1, M2, M3 form becomes the dead electricity zone when small power supply is not enough to support voltage and frequency.
Whole non-fail operation mains switches in step 8, the tripping dead electricity zone, the record circuit state variation (becoming 0 by 1) that puts into operation.
Whole non-fail operation mains switches in the tripping dead electricity zone are for next step circulation drops into bus and circuit provides the basis.
In the present embodiment, by the control sub-station tripping CB2 and the CB3 that are positioned at the SD station, by the control sub-station tripping CB4 and the CB6 that are positioned at the ZQ station.The state variation that puts into operation that records simultaneously L2 and CB2 becomes 0 by 1.
Step 9, by circulation searching bus to be restored electricity, close the corresponding line switch, finish the process of restoring electricity.Concrete steps are as follows:
9.1 be 0 according to the bus state of putting into operation in the dead electricity zone, generate bus formation to be restored electricity;
9.2 whether be empty, be bus current to be restored electricity if not sky is then selected bus formation head of the queue bus to be restored electricity if checking bus formation to be restored electricity, turn 9.3; If sky then turns step 10;
9.3 judge bus associated circuitry current to be restored electricity to side bus put into operation state and associated circuitry Reflector, if to the side bus state of putting into operation be 1 and the associated circuitry Reflector be 0, then turn 9.4; If to the side bus state of putting into operation be 0 or the associated circuitry Reflector be 1, then turn 9.5;
The bus associated circuitry switch current to be restored electricity 9.4 close, the state that puts into operation (becoming 1 by 0) of renewal bus current to be restored electricity turns 9.1;
9.5 deletion bus current to be restored electricity from formation, next bus is new bus current to be restored electricity in the selection formation, judges whether formation is empty, if sky then turns 9.1, if not sky then turns 9.3;
In the present embodiment, at first generating formation to be recovered is M1-〉M2-〉M3.
This formation 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 satisfy the recovery condition; M1 is 0 to the side bus M2 state of putting into operation, and does not satisfy the recovery condition.Therefore delete M1 from formation, formation 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 satisfy the recovery condition; M2 is 0 to the side bus M3 state of putting into operation, and does not satisfy the recovery condition.Therefore delete M2 from formation, formation 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 satisfy the recovery condition; M3 is 1 to the side bus M4 state of putting into operation, and associated circuitry L3 Reflector is 0, satisfies the recovery condition.Therefore close CB6 and CB7, modification M3 puts into operation and is masked as 1, deletes M3 from formation, and formation is empty.
Regenerating formation to be recovered is M1-〉M2.
This formation 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 satisfy the recovery condition; M1 is 0 to the side bus M2 state of putting into operation, and does not satisfy the recovery condition.Therefore delete M1 from formation, formation 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 satisfy the recovery condition; M2 is 1 to the side bus M3 state of putting into operation, and associated circuitry L2 Reflector is 0, satisfies the recovery condition.Therefore close CB3 and CB4, modification M2 puts into operation and is masked as 1, deletes M2 from formation, and formation is empty.
Regenerating formation to be recovered is M1.
This formation 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 satisfy the recovery condition; M1 is 1 to the side bus M2 state of putting into operation, and related mother CB2 Reflector is 0, satisfies the recovery condition.Therefore close CB2, modification M1 puts into operation and is masked as 1, deletes M1 from formation, and formation is empty.
Regenerate formation to be recovered for empty.Turn step 10, 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 only is the preferred embodiments of the invention; detailed explanation is just in order to help the reader to understand better spirit of the present invention; and be not limiting the scope of the invention; on the contrary, any any improvement or modification of doing based on invention spirit of the present invention all should drop within 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 Analysis of Topological Structure, the incidence matrices of generatrix and circuit, matrix element are that 1 this bus of expression links to each other with this circuit, and matrix element is that 0 this bus of expression does not link to each other with this circuit;
(2) identification circuit and bus running manner and record the switch initial condition; If busbar voltage then is judged as greater than definite value and puts into operation, otherwise for stopping transport; Judge according to the line switching state whether circuit puts into operation, if circuit two end switch be closure then circuit otherwise think and be in shut down condition for putting into operation;
(3) behind transformer station's working power fault trip, in conjunction with the topological structure of electrical network, identification fault zone, normal power supply zone and territory, area to be restored;
(4) whether there is small power supply in the judging area electrical network, if there is small power supply then to turn step (5); If then turn step (8) without small power supply, the territory, area to be restored is the dead electricity zone;
(5) judge whether to excise immediately small power supply according to following method, then do not turn step (6) if do not need to excise immediately small power supply, then turn step (7) if need to excise immediately small power supply;
After 5.1 the first predetermined instant T1 occurs in the working power fault trip, initial power vacancy size delta P in the territory, area to be restored〉definite value Dpset, perhaps in the territory, area to be restored that this T1 records constantly frequency change rate df/dt greater than definite value DFDTset, then need to excise immediately small power supply, turn step (7), otherwise enter 5.2;
5.2 the tripping operation fault occured in the rear three predetermined instant T3 times of the second predetermined instant T2 to the, if survey voltage deviation Δ V greater than definite value Dvset, or estimate frequency deviation f greater than definite value DFset, then need to excise immediately small power supply, turn step (7), otherwise enter 5.3;
5.3 the tripping operation fault occured in the rear four predetermined instant T4 times of the 3rd predetermined instant T3 to the, if actual measurement voltage deviation Δ V greater than definite value DVset or practical frequency deviation greater than definite value DFset, then need to understand excision small power supply, turn 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 zone to carry out accurate simultaneous interconnecting, then turn step (10);
(7) whole small power supply line switchings in the territory, tripping area to be restored, the territory, area to be restored becomes the dead electricity zone;
(8) whole non-fail operation mains switches in the tripping dead electricity zone;
(9) answer line switching by circulation searching bus to be restored electricity, closed pair, finish 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), the described frequency deviation f that wherein estimates is calculated by following formula:
Δf=(ΔP-k
vΔV)/k
f
In the formula, Δ P is the second predetermined instant T2 to the three predetermined instant T3 time internal power vacancy size delta P and actual measurement voltage deviation Δ V, k
fFor LOAD FREQUENCY is regulated effect coefficient, k
vFor load voltage is regulated 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 bus in the dead electricity zone is lined up bus formation to be restored electricity;
9.2 whether be empty, be bus current to be restored electricity if not sky is then selected bus formation head of the queue bus to be restored electricity if checking bus formation to be restored electricity, turn 9.3; If sky then turns step (10);
9.3 judge that 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 the associated circuitry fault-free, then turns 9.4; If bus associated circuitry offside Generatrix cease current to be recovered or associated circuitry are malfunction, then turn 9.5;
The bus associated circuitry switch current to be restored electricity 9.4 close, the state that puts into operation of renewal bus current to be restored electricity turns 9.1;
9.5 deletion bus current to be restored electricity selects that next bus is up-to-date bus current to be restored electricity in the described bus formation from described bus formation, judges whether formation is sky, if sky then turns step 9.1, if not sky then turns 9.3.
5. the wide area self adaptation spare power automatic switching method based on synchronous phasor measurement according to claim 1, it 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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| CN103427484A (en) * | 2013-09-02 | 2013-12-04 | 国家电网公司 | Centralized control method of regional power grid spare power automatic switching devices |
| CN103607038A (en) * | 2013-11-25 | 2014-02-26 | 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 |
| CN104092288A (en) * | 2014-07-25 | 2014-10-08 | 云南电网公司 | Spare power automatic switching method and device for intelligent substation |
| CN104300680A (en) * | 2014-10-13 | 2015-01-21 | 华中科技大学 | Protecting intelligent central system orienting transformer substations and cold and hot standby mode selection method thereof |
| 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 |
| CN106771848A (en) * | 2016-11-22 | 2017-05-31 | 华中科技大学 | A kind of electric network failure diagnosis method based on the fusion of topological primitive information |
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| CN114069610A (en) * | 2021-10-21 | 2022-02-18 | 国网山东省电力公司潍坊市寒亭区供电公司 | Power system scheduling control management method and system |
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| CN103427484A (en) * | 2013-09-02 | 2013-12-04 | 国家电网公司 | Centralized control method of regional power grid spare power automatic switching devices |
| 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 |
| CN103607038A (en) * | 2013-11-25 | 2014-02-26 | 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 |
| CN104092288A (en) * | 2014-07-25 | 2014-10-08 | 云南电网公司 | Spare power automatic switching method and device for intelligent substation |
| CN104300680A (en) * | 2014-10-13 | 2015-01-21 | 华中科技大学 | Protecting intelligent central system orienting transformer substations and cold and hot standby mode selection method thereof |
| 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 |
| CN106771848A (en) * | 2016-11-22 | 2017-05-31 | 华中科技大学 | A kind of electric network failure diagnosis method based on the fusion of topological primitive information |
| CN107612021A (en) * | 2017-08-30 | 2018-01-19 | 云南电网有限责任公司临沧供电局 | A kind of region prepared auto restart control method suitable for a large amount of small power supplies access local power network |
| 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 |
| CN114069610A (en) * | 2021-10-21 | 2022-02-18 | 国网山东省电力公司潍坊市寒亭区供电公司 | Power system scheduling control management method and system |
| CN114069610B (en) * | 2021-10-21 | 2023-09-22 | 国网山东省电力公司潍坊市寒亭区供电公司 | Power system dispatching control management method and system |
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