CN102290799B - Small-scale quick recovery method for power supply of power distribution network in open loop running - Google Patents
Small-scale quick recovery method for power supply of power distribution network in open loop running Download PDFInfo
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- CN102290799B CN102290799B CN201110229407.8A CN201110229407A CN102290799B CN 102290799 B CN102290799 B CN 102290799B CN 201110229407 A CN201110229407 A CN 201110229407A CN 102290799 B CN102290799 B CN 102290799B
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Abstract
The invention relates to a small-scale quick recovery method for power supply of a power distribution network in open loop running, comprising the following steps: starting a power supply recovery process; according to the real-time monitoring of the running of the power distribution network and the information interaction with other information systems, processing the acquired running information of the power distribution network and determining non-failure power-off areas required to recover the power supply; formulating a power supply recovery scheme in accordance with power supply recovery rules; executing the power supply recovery scheme and recovering the power supply of the non-failure power-off areas; judging whether the optimization and the adjustment of a running mode are required in accordance with certain rules/expert knowledge; if the running mode is not required to be adjusted, ending the power supply recovery process; if the running mode is required to be adjusted, executing the next step; carrying out optimization analysis and calculation and formulating an optimization and adjustment scheme of the running mode; and executing the optimization and adjustment scheme of the running mode and returning to judge whether a step of optimizing and adjusting the running mode is required.
Description
Technical field
The invention belongs to power system operation control technology field, specifically relate to a kind of on a small scale quick service restoration method of open loop operation power distribution network.
Background technology
Power distribution network, directly towards electric power enterprise terminal client, is directly served users, is bearing to electricity consumption client's function of supplying power.Power distribution network service restoration refers in a broad sense and utilizes modern advanced electronic technology, computer network and the communication technology, realizes the service restoration to the non-fault zone of power distribution network.Under the condition of different hardware equipment, the processing method of power distribution network service restoration mainly contains distributed intelligence method and centralized intelligence method.
Distributed intelligence pattern capital equipment is that FTU is in conjunction with the sectionalizer with coincidence function of circuit breaker or on-load switch formation.It refers to that on-the-spot FTU possesses the ability of automatic fault judgement isolation and service restoration, does not need communication and main station system to participate in.Mainly contain two kinds of voltage-time type (determining fault zone to the time that again occurs decompression according to transformer station outlet protection reclosing) and electric current attributes (cut-off fault current action frequency according to automatic circuit and determine fault zone).The remarkable advantage of these class methods is that cost is low, does not need communication and main website to participate in.But there is following shortcoming: 1. troubleshooting and service restoration speed are slow, system and user are impacted greatly; 2. after fault recovery network reconfiguration, need to change the setting parameter of automatic circuit, the complex network of many power supplys multiple-limb, its parameter mix proportion is more difficult; Abnormal voltage when 3. the coincidence locking of downstream, fault point sectionalizer will rely on detection failure is used as barring condition, and when failure condition is different, abnormal voltage feature also changes larger, so barring condition is more complicated.The method be suitable for grid structure fairly simple, be mainly " handing in hand " circuit of dual power supply, such as the power distribution network of rural area or city suburbs, and do not possess means of communication or communication condition imperfection, occasion that reliability requirement is not high.
The capital equipment of centralized intelligence pattern is on-load switch, the fault detector that has distant control function, the FTU that has communication function, communication channel and main station system.It is, by on-the-spot FTU, the fault message of detection is uploaded to main website by communication apparatus, by main website by the failure indication information that receives and the real-time topology information of power distribution network, according to certain algorithm, determine fault zone, assign operational order to relevant FTU tripping operation isolated fault.Then, main website calculates by service restoration decision-making, determines recovery scheme, and non-fault outage region is restored electricity, and completes load transfer, and this is also DMS processing mode.The feature of this method is that automatization level is high, is applicable to the power distribution network of labyrinth, and can consider actual load level and network constraint.Meanwhile, the method application intelligent software can one-time positioning and isolation, has avoided the repeatedly trial throw of switch, to reduce the loss of equipment.The shortcoming of this method is that investment is large, very high to the reliability of communication system and required communication rate.
Summary of the invention
The object of the invention is when the power distribution network of open loop operation exists small-scale non-fault outage region, provide a kind of open loop operation power distribution network small-scale service restoration method fast.
The object of the invention is to adopt following technical proposals to realize:
Open loop operation power distribution network is a service restoration method fast on a small scale, and its improvements are, described method comprises the steps:
(1) start service restoration flow process;
(2) by the Real-Time Monitoring to power distribution network operation, and with the information interaction of other information systems, process the power distribution network operation information obtaining, determine the non-fault dead electricity region that need to restore electricity;
(3) according to service restoration Rulemaking service restoration scheme;
(4) carry out described service restoration scheme, recover the power supply in described non-fault dead electricity region;
(5), according to certain rule/expertise, judging whether needs to optimize and adjust operation mode; If do not need adjust operation mode, service restoration flow process finishes; If need adjust operation mode, carry out step (6);
(6) be optimized analysis and calculation, formulate optimizing operating mode and adjustment scheme;
(7) carry out described optimizing operating mode and adjustment scheme, return to step (5).
A kind of preferred technical scheme provided by the invention is: described service restoration, refers to by status after distribution network failure with for the operation of power networks recovering state after avoiding accident to take electric grid operating to change and be called service restoration to the process of normal condition; Described service restoration rule, refers to for realizing the rule of service restoration, and this rule is based on certain power distribution network mode of connection, and has typicalness; Described non-fault dead electricity region, refers to that network or the equipment of region within the jurisdiction do not break down owing to taking Fault Isolation measure, can normal power supply the but region of dead electricity.
The provided by the invention second preferred technical scheme is: in described step (1), while meeting following condition, start service restoration flow process:
A, risk-aversion have judged whether that load need to restore electricity after controlling and finishing, if needed, start described service restoration control program;
After B, emergency control finish, judged whether that load need to restore electricity, if needed, started described service restoration control program;
C, manually change original operational mode and finish after, judged whether that load need to restore electricity, if needed, start described service restoration control program;
D, when starting service restoration instruction or system and be tested with the region that need to restore electricity according to operator, start described service restoration control program.
The provided by the invention the 3rd preferred technical scheme is: the power distribution network operation information in described step (2), refers to the switch folding condition information of distribution network, the voltage and current information of each Nodes of distribution network before and after service restoration; Described other information systems comprise data acquisition and supervisor control.
The provided by the invention the 4th preferred technical scheme is: described step (3) service restoration rule comprises based on distribution network wiring type divides the quick service restoration rule of the normal power supplies of realizing and based on distribution network wiring type, divide the quick service restoration rule containing distributed power source DG realizing, the quick service restoration rule of the described normal power supplies of divide realizing based on distribution network wiring type and comprise the service restoration rule of the radial mode of connection of single supply containing the quick service restoration rule of distributed power source DG, the service restoration rule of double loop parallel wires mode, single supply is from the service restoration rule of connection of ring power network mode, the hand in hand service restoration rule of the mode of connection of duplicate supply, the service restoration rule of the switching station mode of connection, N is for 1 rule of the service restoration for martingale mode, N power supply hand in hand the service restoration rule of the mode of connection and the service restoration of the latticed complicated mode of connection regular, described certain rule/expertise comprises that whether judge voltage and current out-of-limit.
The provided by the invention the 5th preferred technical scheme is: in described step (5), adopt following content to judge whether to need to optimize and adjust operation mode:
When turning power supply source institute bringing onto load and turn described in surpassing the load capacity of power supply source, or after described non-fault dead electricity region restores electricity, voltage deviation surpasses safety value, or in the time of need to carrying out project setting operation according to operator command, need to be optimized analysis to executed power supply plan.
The provided by the invention the 6th preferred technical scheme is: described risk-aversion is controlled, and refers to that power distribution network is when risk status, the prevention and control measure of taking; Described emergency control, refers to when power distribution network is in a state of emergency, the control measure of taking.
The provided by the invention the 7th preferred technical scheme is: the described service restoration rule containing distributed power source DG comprises:
If a distributed power source DG independent operating, but have automatic transfer equipment between distributed power source DG and local electrical network, first rely on described automatic transfer equipment, adopt islet operation pattern, enable distributed power source DG to described non-fault dead electricity block supply;
If b distributed power source DG and described distribution network system parallel running, but distributed power source DG is to described local electrical network no-output, according to the situation of exerting oneself in real time of distributed power source DG, when distributed power source DG takes up the load in described non-fault dead electricity region, enable distributed power source DG and adopt described islet operation pattern to described non-fault dead electricity block supply; Enter the step (4) of service restoration method; When exerting oneself in real time of distributed power source can not take up local load, keep the power failure state in described non-fault dead electricity region; Or
If c distributed power source DG and system parallel running and to described local electrical network output electric energy, enable distributed power source DG described non-fault dead electricity region farthest restored electricity.
The provided by the invention the 8th preferred technical scheme is: described local electrical network is for the partial electric grid of powering with respect to distributed power source, the power distribution network of being powered by normal power supplies being connected with this partial electric grid;
Described automatic transfer equipment, refers to the control appliance being arranged between distributed power source and local electrical network, by this equipment, can select partial electric grid to be powered by described normal power supplies, or is powered by described distributed power source DG;
Described islet operation pattern, refers to and departs from large electrical network, by the pattern of the independently-powered operation of described distributed power source DG;
Described parallel running, refers to described distributed power source DG is entered to local electrical network as a power supply parallel connection, together with normal power supplies to local load supplying.
Compared with prior art, the beneficial effect that the present invention reaches is:
The present invention considers the impact of the deficiencies in the prior art and distributed power source, provides a kind of open loop operation power distribution network on a small scale quick service restoration method.Than original technology, the present invention is on the basis of all kinds of operation informations of distribution network, and identification needs the non-fault dead electricity region of recovering, and according to the wiring type of place, non-fault dead electricity region feeder line, establishs and enforces corresponding service restoration method.Service restoration scheme has more specific aim, operates simplyr, has greatly saved the service restoration time used.After service restoration method is finished, the safe operation information of monitoring power distribution network, further optimizes and revises the operational mode of needs adjustment, has guaranteed the safe and reliable operation of power distribution network.
Accompanying drawing explanation
Fig. 1 is single supply radiation winding diagram;
Fig. 2 is double loop parallel wires figure;
Fig. 3 is that single supply is from connection of ring power network figure;
Fig. 4 is the duplicate supply winding diagram of handing in hand;
Fig. 5 is switching station winding diagram;
Fig. 6 is that N supplies 1 for martingale figure;
Fig. 7 is many power supplys winding diagrams of handing in hand;
Fig. 8 is latticed complicated winding diagram;
Fig. 9 is service restoration method overview flow chart provided by the invention;
Figure 10 is the service restoration flow chart containing distributed power source DG provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
The invention provides a kind of on a small scale quick service restoration method of open loop operation power distribution network, by distribution network according to the different demarcation of the mode of connection be the radial wiring of single supply, double loop parallel wires, single supply from connection of ring power network, duplicate supply hand in hand wiring, switching station wiring, N for 1 for wiring, N power supply hand in hand wiring and eight kinds of wiring types of latticed complicated wiring, every kind of service restoration rule that wiring type is corresponding different.N is≤5 positive integer.
The invention provides and adopt normal power supplies to carry out the service restoration rule of quick service restoration, and after normal power supplies service restoration finishes, while still there is non-fault outage region, contain the service restoration rule of distributed power source DG.
Described service restoration, refers to by status after electric network fault with for avoiding operation of power networks recovering state after certain accident takes some electric grid operatings to change to be called service restoration to the process of normal condition.
Described service restoration rule, refers to for realizing the rule of service restoration, and this rule is based on certain formulation mode (certain power distribution network mode of connection), and has typicalness.This method adopts based on power distribution network wiring type and divides the service restoration rule realizing, and comprises the service restoration rule of the radial mode of connection of single supply, the service restoration rule of double loop parallel wires mode, single supply are handed in hand the service restoration rule of the mode of connection, service restoration rule under the switching station mode of connection, N for 1 rule of the service restoration for the mode of connection, N power supply hand in hand the service restoration rule of the mode of connection and the service restoration rule of the latticed complicated mode of connection from service restoration rule, the duplicate supply of connection of ring power network mode.
Described non-fault dead electricity region, refers to that network or the equipment of region within the jurisdiction do not break down owing to taking Fault Isolation measure, can normal power supply the but region of dead electricity.
As shown in Figure 9, Fig. 9 is service restoration method overview flow chart provided by the invention, the present invention includes following steps:
(1) start service restoration flow process.
While meeting following condition, start service restoration flow process:
A, risk-aversion have judged whether that load need to restore electricity after controlling and finishing, if needed, start service restoration control program;
After B, emergency control finish, judged whether that load need to restore electricity, if needed, started service restoration control program;
C, manually change original operational mode and finish after, judged whether that load need to restore electricity, if needed, start service restoration control program;
D, when starting service restoration instruction or system and be tested with the region that need to restore electricity according to operator.
Described risk-aversion is controlled, and refers to that electrical network is when risk status, the prevention and control measure of taking.Risk status refers to after current operation of power networks conditioned disjunction current point in time under service conditions, a certain or the multinomial operating index of electrical network has exceeded maybe will exceed preset range, have larger possibility to cause operation of power networks target component to worsen, occur certain or multiple power grid accident; Though or risk do not appear in electrical network, there is foregone conclusion part, service conditions, the operation of power networks state of the control measure that need to employ prevention.As overload, low-voltage, local overheating, operating point approach stability limit and some other abnormal operating condition.
Described emergency control, refers to when electrical network is in a state of emergency, the control measure of taking.The state of emergency refers to that electrical network one place or many places have occurred or is continuing to occur certain or multiple power grid accident, not yet takes to protect control measure; Though or taked protection, control measure, but accident still continuing, operation of power networks is still at the state worsening, and caused or just caused that customer power supply interrupts, electric power facility damage, quality of power supply severe overweight (frequency out-of-limit, overvoltage, voltage dip/brownout, fluctuation shape aberration rate are high), electrical network unstability etc.; Though or electrical network do not break down, there is foregone conclusion part, service conditions, need to take the operation of power networks state of urgent protection, control measure.
(2) by the Real-Time Monitoring to power distribution network operation, and with the information interaction of other information systems (for example data acquisition and supervisor control), process the power distribution network operation information obtaining, determine the non-fault dead electricity region that need to restore electricity.
(3) according to service restoration Rulemaking service restoration scheme.
Adopt the service restoration rule of normal power supplies as follows:
1) service restoration of the radial mode of connection of single supply rule
If a non-fault dead electricity region is adjacent with power supply, the block switch that closes, recovers the power supply in non-fault dead electricity region.
If the non-fault dead electricity of b region is not adjacent with power supply, do not carry out service restoration.
The radial wiring of described single supply, refers to the feeder line that is only associated with a power supply, and this feeder line extends to load center by power supply point, does not possess load transfer ability, as shown in Figure 1.
2) service restoration of double loop parallel wires mode rule
Service restoration under service restoration under the parallel wires mode of double loop and the radial mode of connection of single supply adopts same rule to carry out service restoration.
Described double loop parallel wires, refers to that the trend of two feeder lines is parallel to each other, and is extended to the mode of connection of load center by power supply point simultaneously.According to client's situation, can obtain the power supply of two-way power supply simultaneously, also can get only the power supply of Dao Yi road power supply, as shown in Figure 2.
3) single supply is from the service restoration rule of connection of ring power network mode
If a non-fault dead electricity region is adjacent with power supply, the block switch that closes, recovers the power supply in non-fault dead electricity region.
If the feeder line of b non-fault dead electricity region and normal power supply is adjacent, the interconnection switch closing between the two, recovers the power supply in non-fault dead electricity region.
Described single supply, from connection of ring power network, refers to that two feedback line of being drawn by same bus form loop, and ring internal loading is powered by this two loop lines road simultaneously, if wherein break down in a loop line road, the power supply of all loads in ring can be born in another loop, as shown in Figure 3.
4) the duplicate supply service restoration rule of the mode of connection of handing in hand
If a non-fault dead electricity region is adjacent with power supply, the block switch that closes, recovers the power supply in non-fault dead electricity region.
If the feeder line of b non-fault dead electricity region and normal power supply is adjacent, compare the confession ability that the turns P of adjacent feeders
s2Zwith the required recovery load P in dead electricity region
lose.
Work as P
s2Z>=P
losetime, the interconnection switch of non-fault dead electricity region and other adjacent feeders that closes, recovers non-fault dead electricity block supply;
Work as P
s2Z< P
losetime, cut away apart from interconnection switch load P farthest
lose1, judgement P
s2Zwith (P
lose-P
lose1) size, until the turning for ability of adjacent feeders
the close interconnection switch of non-fault dead electricity region and other feeder lines, recovers the power supply in non-fault dead electricity region.
The wiring of handing in hand of described duplicate supply, refers to that two feedback line of being drawn by the different buses of different substation or same transformer station form loop by interconnection switch contact, under interconnection switch normal condition in off-state.If wherein break down in a loop line road, another loop can be by the power supply of all loads in closed interconnection switch burden ring, as shown in Figure 4.
5) service restoration of switching station mode of connection rule
If the non-fault dead electricity of a region is positioned at the inlet wire of switching station, the block switch of close switching station and another power supply, recovers switching station to power.
If the non-fault dead electricity of b region is positioned at the outlet of switching station, the radial wiring of outlet and single supply adopts same rule to carry out service restoration.
Described switching station wiring, refer to that twice of being drawn by the different buses of different substation or same transformer station and above feeder line are connected to switching station, circuit adopts N for a standby mode, switching station to be powered, and by switching station, draws many outlets to load power supply around, as shown in Figure 5.
6) N is for 1 rule of the service restoration for martingale mode
If a non-fault dead electricity region is adjacent with power supply, the block switch of close non-fault dead electricity region and power supply, recovers the power supply in non-fault dead electricity region.
If b non-fault dead electricity region is adjacent with extension wire, the block switch of close non-fault dead electricity region and extension wire, recovers the power supply in non-fault dead electricity region.
Described N for martingale, refers to that N bar circuit is linked to be looped network for 1, wherein has 1 circuit as public extension wire.Non-extension wire full-load run, if there is certain 1 working line to break down, can put extension wire into operation by circuit switching, as shown in Figure 6.
7) the N power supply service restoration rule of the mode of connection of handing in hand
If a non-fault dead electricity region is adjacent with power supply, the interconnection switch of close non-fault dead electricity region and power supply, recovers the power supply in non-fault dead electricity region.
If the non-fault dead electricity of b region is adjacent with N condition feeder line except power supply, judge N bar feeder line and interconnection switch place, non-fault dead electricity region voltage swing, turn confession capacity of water, when N=1, remember that this feeder line that is connected is S
2, when N is greater than 1, remember magnitude of voltage the highest/feeder line turning for ability maximum is S
2, voltage is time high/and turning for an ability time high feeder line is S
3, with S
2with voltage in power supply time high/turning for ability time high feeder line is S
4.
Compare feeder line S
2turn for ability P
s2Zwith the required recovery load P in non-fault dead electricity region
losesize.
Work as P
s2Z>=P
losetime, the feeder line S of power turn-on
2with the interconnection switch in non-fault dead electricity region, recover non-fault dead electricity block supply;
Work as P
s2Z< P
losetime, if there is S
4, S closes
2, S
4with the interconnection switch in non-fault dead electricity region, meanwhile, if non-fault dead electricity region can be divided into independently-powered district and two independently-powered districts respectively with S
2, S
4be connected, non-fault dead electricity divided into two respectively by S
2, S
4the independently-powered district of power supply (while having the multiple scheme that is divided into independently-powered district, selects load to approach decile, preferentially adopt S
2turn for the larger scheme of load)
Work as P
s2Z< P
losetime, if there is no S
4, and there is S
3if, non-fault dead electricity region can be divided into independently-powered district and two independently-powered districts respectively with S
2, S
3be connected, non-fault dead electricity divided into two respectively by S
2, S
4the independently-powered district of power supply (while having the multiple scheme that is divided into independently-powered district, selects load to approach decile, preferentially adopt S
2turn for the larger scheme of load), S closes
2, S
3interconnection switch with non-fault dead electricity region; If if non-fault dead electricity region can not be divided into two independently-powered districts respectively with S
2, S
3be connected, cut away apart from interconnection switch load P farthest
lose1, judgement P
s2Zwith P
lose-P
lose1size, until the turning for ability of adjacent feeders
the close interconnection switch of non-fault dead electricity region and other feeder lines, recovers the power supply in non-fault dead electricity region.
The wiring of handing in hand of described many power supplys, refers to many feeder lines by the different buses from different substation or same transformer station, establishes one or more interconnection switches between each feeder line, any feeder fault, closed interconnection switch, arrives adjacent feeders by load transfer, complete and turn confession, as shown in Figure 7.
8) service restoration of latticed complicated mode of connection rule
If a non-fault dead electricity region is adjacent with former power supply, the interconnection switch of close non-fault dead electricity region and power supply, recovers the power supply in non-fault dead electricity region.
If the non-fault dead electricity of b region is adjacent with the N condition feeder line except former power supply, judge the voltage swing at N bar feeder line and interconnection switch place, non-fault dead electricity region, when N=1, remember that the feeder line that is connected is S
2, when N is greater than 1, remember magnitude of voltage the highest/feeder line turning for ability maximum is S
2, voltage is time high/and turning for an ability time high feeder line is S
3, with S
2with voltage in power supply time high/turning for ability time high feeder line is S
4.
Compare S
2turn for ability P
s2Zwith the required recovery load P in non-fault dead electricity region
losesize.
Work as P
s2Z>=P
losetime, the feeder line S of power turn-on
2with the interconnection switch in non-fault dead electricity region, recover non-fault dead electricity block supply;
Work as P
s2Z< P
losetime, if there is S
4, S closes
2, S
4with the interconnection switch in non-fault dead electricity region, meanwhile, if non-fault dead electricity region can be divided into independently-powered district and two independently-powered districts respectively with S
2, S
4be connected, non-fault dead electricity divided into two respectively by S
2, S
4the independently-powered district of power supply (while having the multiple scheme that is divided into independently-powered district, selects load to approach decile, preferentially adopt S
2turn for the larger scheme of load)
Work as P
s2Z< P
losetime, if there is no S
4, and there is S
3if, non-fault dead electricity region can be divided into independently-powered district and two independently-powered districts respectively with S
2, S
3be connected, non-fault dead electricity divided into two respectively by S
2, S
4the independently-powered district of power supply (while having the multiple scheme that is divided into independently-powered district, selects load to approach decile, preferentially adopt S
2turn for the larger scheme of load), S closes
2, S
3interconnection switch with non-fault dead electricity region; If non-fault dead electricity region can not be divided into two independently-powered districts respectively with S
2, S
3be connected, cut away apart from interconnection switch load P farthest
lose1, judgement P
s2Zwith (P
lose-P
lose1) size, until the turning for ability of adjacent feeders
the close interconnection switch of non-fault dead electricity region and other feeder lines, recovers the power supply in non-fault dead electricity region.
Described latticed complicated wiring, refer to many feeder lines by the different buses from different substation or same transformer station, between every feeder line, establish a plurality of interconnection switches and other many feeder line interconnection, each feeder line is connected through interconnection switch, form grid one by one, make user obtain power supply from many feeder lines, as shown in Figure 8.
Adopt containing the service restoration rule of distributed power source DG as follows:
1) service restoration of the radial mode of connection of single supply rule
If A non-fault dead electricity region is adjacent with power supply, the block switch that closes, recovers the power supply in non-fault dead electricity region.
If the non-fault dead electricity of B region is not adjacent with power supply, judge whether non-fault dead electricity region contains distributed power source DG, contain DG and adopt the service restoration rule containing DG, otherwise cannot realize service restoration.
2) service restoration of double loop parallel wires mode rule
Service restoration under the parallel wires mode of double loop adopts same rule to carry out service restoration with the service restoration containing under the radial mode of connection of single supply of distributed power source DG.
3) single supply is from the service restoration rule of connection of ring power network mode
If A non-fault dead electricity region is adjacent with power supply, the block switch that closes, recovers the power supply in non-fault dead electricity region.
If B non-fault dead electricity region is adjacent with feeder line, the interconnection switch closing between the two, recovers the power supply in non-fault dead electricity region.
4) the duplicate supply service restoration rule of the mode of connection of handing in hand
If A non-fault dead electricity region is adjacent with power supply, the block switch that closes, recovers the power supply in non-fault dead electricity region.
If B non-fault dead electricity region is adjacent with feeder line, compare the confession ability that the turns P of adjacent feeders
s2Zwith the required recovery load P in non-fault dead electricity region
lose.
Work as P
s2Z>=P
losetime, the interconnection switch of non-fault dead electricity region and other adjacent feeders that closes, recovers non-fault dead electricity block supply;
Work as P
s2Z< P
losetime, cut away apart from interconnection switch load P farthest
lose1, judgement P
s2Zwith (P
lose-P
lose1) size, until the turning for ability of adjacent feeders
the close interconnection switch of non-fault dead electricity region and other feeder lines, recovers the power supply in non-fault dead electricity region.
C, for the non-fault outage region that can not turn confession, judge whether this region contains DG, contain the service restoration rule adopting containing DG, otherwise cannot realize the service restoration in this region.
5) service restoration of switching station mode of connection rule
If the non-fault dead electricity of A region is positioned at the inlet wire of switching station, the block switch of close switching station and another power supply, recovers switching station to power.
If the non-fault dead electricity of B region is positioned at the outlet of switching station, the radial wiring of outlet and single supply adopts same rule to carry out service restoration.
6) N is for 1 rule of the service restoration for martingale mode
If A non-fault dead electricity region is adjacent with power supply, the block switch of close non-fault dead electricity region and power supply, recovers the power supply in non-fault dead electricity region.
If B non-fault dead electricity region is adjacent with extension wire, the block switch of close non-fault dead electricity region and extension wire, recovers the power supply in non-fault dead electricity region.
7) the N power supply service restoration rule of the mode of connection of handing in hand
If A non-fault dead electricity region is adjacent with power supply, the interconnection switch of close non-fault dead electricity region and power supply, recovers the power supply in non-fault dead electricity region.
If B non-fault dead electricity region is adjacent with other feeder lines, compare the voltage swing at adjacent feeders and interconnection switch place, dead electricity region, the feeder line of getting the power supply that magnitude of voltage is the highest is S
2, the feeder line S of closed non-fault dead electricity region and power supply
2between interconnection switch, recover the power supply in non-fault dead electricity region.
8) service restoration of latticed complicated mode of connection rule
If A non-fault dead electricity region is adjacent with power supply, the interconnection switch of close non-fault dead electricity region and power supply, recovers the power supply in non-fault dead electricity region.
If B non-fault dead electricity region is adjacent with feeder line, judge the voltage swing at all the other N-1 bar feeder lines and interconnection switch place, dead electricity region, the feeder line of getting the power supply that magnitude of voltage is the highest is S
2, relatively it turns for ability P
s2Zwith the required recovery load P in non-fault dead electricity region
losesize.
Work as P
s2Z>=P
losetime, the feeder line S of power turn-on
2with the interconnection switch in non-fault dead electricity region, recover non-fault dead electricity block supply;
Work as P
s2Z< P
losetime, reject the feeder line S with power supply
2turned power supply source at non-fault dead electricity region block switch homonymy.If there is no other power supplys that can turn confession, cut away apart from interconnection switch load P farthest
lose1, judgement P
s2Zwith (P
lose-P
lose1) size, until the turning for ability of adjacent feeders
the close interconnection switch of non-fault dead electricity region and other feeder lines, recovers the power supply in non-fault dead electricity region.For the non-fault outage region that can not turn confession, judge whether this region contains DG, contain the service restoration rule adopting containing DG, otherwise cannot realize the service restoration in this region.
If other the block switch sides contact of C in non-fault dead electricity region has, can turn power supply source, other can turn the nearest block switch of power supply source to disconnect so non-fault dead electricity region distance, and closed non-fault dead electricity region and other can turn the interconnection switch of power supply source.The feeder line S of closed power supply of while
2with the interconnection switch in non-fault dead electricity region, recover the power supply in non-fault dead electricity region.
As shown in figure 10, the service restoration of distributed power source DG rule is as follows:
1) if distributed power source independent operating but has automatic transfer equipment between distributed power source and local electrical network.So first, rely on conversion equipment, adopt islet operation pattern, enable distributed power source to dead electricity block supply;
2) if distributed power source and system parallel running, but distributed power source is to local electrical network no-output.According to the service data of distribution network, check so the situation of exerting oneself in real time of distributed power source, when DG can take up the load in dead electricity region, enable distributed power source and adopt islet operation pattern to dead electricity block supply, enter the next step of service restoration flow process; When exerting oneself in real time of distributed power source can not take up local load, keep the power failure state in non-fault dead electricity region;
3) if distributed power source and system parallel running and to local electrical network output electric energy.Enabling so distributed power source farthest restores electricity to dead electricity region.
(4) carry out service restoration scheme, recover the power supply in non-fault dead electricity region.
(5) rule/expertises (whether out-of-limit such as electric current and voltage) that foundation is certain etc., judging whether needs to optimize and adjust operation mode.If do not need adjust operation mode, service restoration flow process finishes.If need adjust operation mode, carry out step (6).
Judge whether to need optimization and adjust operation mode to adopt rule as follows: when turning power supply source institute bringing onto load, to surpass its load capacity, or when voltage deviation surpasses safety value after non-fault dead electricity region restores electricity, need to be optimized analysis to executed power supply plan; Otherwise do not need adjust operation mode.
(6) be optimized analysis and calculation, formulate optimizing operating mode and adjustment scheme.
(7) carry out operational mode and adjust scheme, return to step (5).
Finally should be noted that: above embodiment is only in order to illustrate the application's technical scheme but not restriction to its protection range; although the application is had been described in detail with reference to above-described embodiment; those of ordinary skill in the field are to be understood that: those skilled in the art still can carry out all changes, revise or be equal to replacement to the embodiment of application after reading the application; these change, revise or be equal to replacement, within the claim scope that it all awaits the reply in its application.
Claims (8)
1. the on a small scale quick service restoration method of open loop operation power distribution network, is characterized in that, described method comprises the steps:
(1) start service restoration flow process;
(2) by the Real-Time Monitoring to power distribution network operation, and with the information interaction of other information systems, process the power distribution network operation information obtaining, determine the non-fault dead electricity region that need to restore electricity;
(3) according to service restoration Rulemaking service restoration scheme;
(4) carry out described service restoration scheme, recover the power supply in described non-fault dead electricity region;
(5), according to certain rule or expertise, judging whether needs to optimize and adjust operation mode; If do not need adjust operation mode, service restoration flow process finishes; If need adjust operation mode, carry out step (6);
(6) be optimized analysis and calculation, formulate optimizing operating mode and adjustment scheme;
(7) carry out described optimizing operating mode and adjustment scheme, return to step (5);
Described step (3) service restoration rule comprises based on distribution network wiring type divides the quick service restoration rule of the normal power supplies of realizing and based on distribution network wiring type, divides the quick service restoration rule containing distributed power source DG realizing, the quick service restoration rule of the described normal power supplies of divide realizing based on distribution network wiring type and comprise the service restoration rule of the radial mode of connection of single supply containing the quick service restoration rule of distributed power source DG, the service restoration rule of double loop parallel wires mode, single supply is from the service restoration rule of connection of ring power network mode, the hand in hand service restoration rule of the mode of connection of duplicate supply, the service restoration rule of the switching station mode of connection, N is for 1 rule of the service restoration for the mode of connection, N power supply hand in hand the service restoration rule of the mode of connection and the service restoration of the latticed complicated mode of connection regular, described certain rule or expertise comprise that whether judge voltage and current out-of-limit.
2. quick service restoration method as claimed in claim 1, is characterized in that, described service restoration refers to status after distribution network failure and is that the operation of power networks recovering state after avoiding accident to take electric grid operating to change is to the process of normal condition; Described service restoration rule, refers to for realizing the rule of service restoration, and this rule is based on certain power distribution network mode of connection, and has typicalness; Described non-fault dead electricity region, refers to that network or the equipment of region within the jurisdiction do not break down owing to taking Fault Isolation measure, can normal power supply the but region of dead electricity.
3. quick service restoration method as claimed in claim 1, is characterized in that, in described step (1), while meeting following condition, starts service restoration flow process:
A, risk-aversion have judged whether that load need to restore electricity after controlling and finishing, if needed, start described service restoration scheme;
After B, emergency control finish, judged whether that load need to restore electricity, if needed, started described service restoration scheme;
C, manually change original operational mode and finish after, judged whether that load need to restore electricity, if needed, start described service restoration scheme;
D, when starting service restoration instruction or system and be tested with the region that need to restore electricity according to operator, start described service restoration scheme.
4. quick service restoration method as claimed in claim 1, is characterized in that, the power distribution network operation information in described step (2) refers to the switch folding condition information of distribution network, the voltage and current information of each Nodes of distribution network before and after service restoration; Described other information systems comprise data acquisition and supervisor control.
5. quick service restoration method as claimed in claim 1, is characterized in that, adopts following content to judge whether to need to optimize and adjust operation mode in described step (5):
When turning power supply source institute bringing onto load and turn described in surpassing the load capacity of power supply source, or after described non-fault dead electricity region restores electricity, voltage deviation surpasses safety value, or in the time of need to carrying out project setting operation according to operator command, need to be optimized analysis to executed power supply plan.
6. quick service restoration method as claimed in claim 3, is characterized in that, described risk-aversion is controlled, and refers to that power distribution network is when risk status, the prevention and control measure of taking; Described emergency control, refers to when power distribution network is in a state of emergency, the control measure of taking.
7. quick service restoration method as claimed in claim 1, is characterized in that, the described quick service restoration rule containing distributed power source DG comprises:
If a distributed power source DG independent operating, but have automatic transfer equipment between distributed power source DG and local electrical network, first rely on described automatic transfer equipment, adopt islet operation pattern, enable distributed power source DG to described non-fault dead electricity block supply;
If b distributed power source DG and distribution network system parallel running, but distributed power source DG is to described local electrical network no-output, according to the situation of exerting oneself in real time of distributed power source DG, when distributed power source DG takes up the load in described non-fault dead electricity region, enable distributed power source DG and adopt described islet operation pattern to described non-fault dead electricity block supply; Enter the step (4) of service restoration method; When exerting oneself in real time of distributed power source can not take up local load, keep the power failure state in described non-fault dead electricity region; Or
If c distributed power source DG and system parallel running and to described local electrical network output electric energy, enable distributed power source DG described non-fault dead electricity region farthest restored electricity.
8. quick service restoration method as claimed in claim 7, is characterized in that, described local electrical network is for the partial electric grid of powering with respect to distributed power source, the power distribution network of being powered by normal power supplies being connected with this partial electric grid;
Described automatic transfer equipment, refers to the control appliance being arranged between distributed power source and local electrical network, by this equipment, can select partial electric grid to be powered by described normal power supplies, or is powered by described distributed power source DG;
Described islet operation pattern, refers to and departs from large electrical network, by the pattern of the independently-powered operation of described distributed power source DG; Described parallel running, refers to described distributed power source DG is entered to local electrical network as a power supply parallel connection, together with normal power supplies to local load supplying.
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| CN102868161B (en) * | 2012-10-23 | 2015-01-07 | 四川大学 | Optimization method of network variable structure with distributed type power supply distribution system |
| CN102882197B (en) * | 2012-10-30 | 2014-12-10 | 山东电力集团公司烟台供电公司 | DG (distributed generation)-containing power distribution network distributed protection and control method |
| CN102999784B (en) * | 2012-11-20 | 2016-08-24 | 广东电网公司 | Power grid heavy-load analyzes method and system |
| CN103236683A (en) * | 2013-04-25 | 2013-08-07 | 国家电网公司 | Grid fault accident management method |
| CN105429301B (en) * | 2015-12-17 | 2018-09-28 | 南京因泰莱电器股份有限公司 | A kind of Intelligent power distribution network self-healing control method based on modal analysis |
| CN105896494A (en) * | 2016-04-22 | 2016-08-24 | 国网天津市电力公司 | Complementary method for handling fault in power distribution network based on power guarantee mode |
| CN105896495A (en) * | 2016-04-22 | 2016-08-24 | 国网天津市电力公司 | Complementary method for handling fault in distribution network based on dual cable power supply |
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