CN107919678A - The service restoration method and system of alternating current-direct current mixing power distribution network - Google Patents
The service restoration method and system of alternating current-direct current mixing power distribution network Download PDFInfo
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- CN107919678A CN107919678A CN201711094580.5A CN201711094580A CN107919678A CN 107919678 A CN107919678 A CN 107919678A CN 201711094580 A CN201711094580 A CN 201711094580A CN 107919678 A CN107919678 A CN 107919678A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Abstract
The invention discloses a kind of service restoration method and system of alternating current-direct current mixing power distribution network.The present invention includes step：1) prestore all kinds of parameters of alternating current-direct current mixing power distribution network, establishes power grid initial primary topology in distribution network system, and operationally record network load situation in real time；2) fault message, locking dead electricity region are collected；3) service restoration optimization problem model is established；4) use original dual interior point solution procedure 3) described in service restoration optimization problem model；5) service restoration result and control decision amount result are exported.The present invention for the alternating current-direct current mixing power distribution network containing flexible DC power transmission provide it is a kind of be easily achieved, the service restoration method of high efficient and reliable, it uses widely used this optimization problem of original dual interior point solution service restoration, by the alternating current-direct current mixing power distribution network of applicable various structures after easy amendment operation, while obtain the vector controlled parameter of corresponding voltage source transverter.
Description
Technical field
It is particularly a kind of to be mixed for the alternating current-direct current containing flexible DC power transmission the present invention relates to Operation of Electric Systems control field
Close the service restoration method based on primal-dual interior method of power distribution network.
Technical background
Compared to traditional AC distribution net, can preferably be connect using the alternating current-direct current mixing power distribution network of flexible direct current device
Receive distributed generation resource and DC load, it is limited with the high contradiction of load density to alleviate urban distribution network website corridor, while in load
Center provides dynamic reactive and supports, improves system safety and stability level and reduces loss.Alternating current-direct current mixing power distribution network is power distribution network
An important development trend, can effectively lift the power quality, reliability and operational efficiency of city electric distribution system.
The alternating current-direct current mixing power distribution network of flexible direct current device is used to provide new possibility for service restoration.AC system electricity
When pressure collapse or stoppage in transit, the startup of flexible direct current power transmission system moment refers to its voltage, becomes the spare power generation of no rotary inertia
Machine, the important load into paralysis power grid are powered, and dynamic compensates ac bus reactive power, stablizes ac bus voltage, if
Capacity allows that even active power and reactive power Emergency Assistance can be provided to failure system, improves system power-angle stability.
At present, the research to flexible direct current and practice both at home and abroad focuses primarily upon high voltage, the power transmission engineering of large capacity is answered
With；And the research to the alternating current-direct current mixing power distribution network using flexible direct current device is still in the exploratory stage.As operation control and
The extension of scheduling strategy, the service restoration of alternating current-direct current mixing power distribution network by with research afterwards and engineering practice deeply gradually by
To attention, and provided theoretical reference.
The content of the invention
The technical problems to be solved by the invention are to overcome the problems of the above-mentioned prior art, to be defeated containing flexible direct current
Electricity alternating current-direct current mixing power distribution network offer it is a kind of be easily achieved, the service restoration method of high efficient and reliable, it uses widely used
This optimization problem of primal-dual interior method solution service restoration, passes through applicable various structures after easy amendment operation
Alternating current-direct current mixing power distribution network, while obtain the vector controlled parameter of corresponding voltage source transverter.
For this reason, the present invention adopts the following technical scheme that：The service restoration method of alternating current-direct current mixing power distribution network, it includes step
Suddenly：
1) prestore all kinds of parameters of alternating current-direct current mixing power distribution network, and power grid initial primary topology is established in distribution network system,
And network load situation is operationally recorded in real time；
2) fault message, locking dead electricity region are collected；
3) service restoration optimization problem model is established；
4) use primal-dual interior method solution procedure 3) described in service restoration optimization problem model；
5) service restoration result and control decision amount result are exported.
Primal-dual interior method is a kind of efficient algorithm for solving optimization problem.This method from Initial Internal Points, along
Most fast descent direction, optimal solution is directly moved towards from feasible zone inside.Convergence speed of the algorithm is fast, strong robustness, to Initial value choice
It is insensitive, and substantial amounts of constraints is adapted to, and obtain more accurate optimization result.It in the case where iterations is less according to
It is old to reduce accumulated error, precision is improved, reduces the amount of storage on computer.Therefore, primal-dual interior method is a kind of energy
The algorithm of enough complicated optimum problems effectively solved in alternating current-direct current series-parallel connection distribution system.
As the supplement of above-mentioned technical proposal, step 1) includes step：
11) initialize, typing distribution network data, and establish corresponding database, database includes track data storehouse, load
Database and nodal community storehouse；
12) to exchange side power grid, read step 11) described in data, establish initial topology knot by improving adjacency matrix
Structure；
13) real-time update, collects the load value of power distribution network.
As the supplement of above-mentioned technical proposal, the particular content of step 11) is：
To alternating current-direct current mixing Modeling of Distribution Network, for each node serial number and the permitted scope of voltage magnitude is limited, will be connected
The electric parameter of each bar circuit of each node passes through computer incoming line database.
As the supplement of above-mentioned technical proposal, the particular content of step 12) is：
Read step 11) described in data, power grid initial primary topology is integrated into improvement adjacency matrix, the improvement adjoining
The element of matrix is specific as follows：
Wherein, vj、vkRepresent node；I is circuit (vj,vk) call number in track data storehouse；E (V) represents that node connects
The set of edge fit, circuit (vj,vk) represent connecting node vjAnd vkCircuit；
The improvement adjacency matrix has a symmetry, the circuit of connection two members corresponding in adjacency matrix is improved
Plain A [vj][vk] and A [vk][vj] it is i；And the corresponding two elements A [v of circuit disconnectedj][vk] and A [vk][vj] be-
i；Element there is no circuit is 0；When electric network composition changes, some switch is such as disconnected, it is necessary to two of adjacency matrix will be improved
Corresponding element A [vj][vk] and A [vk][vj] by original on the occasion of being set to negative value；Equally, such as close some switch, then need by
Improve two corresponding element A [v in adjacency matrixj][vk] and A [vk][vj] by negative value be set on the occasion of；
The connection situation of exchange side power grid is obtained by improving adjacency matrix, the improvement is promptly corrected after switching manipulation
Adjacency matrix, to update the topological structure of power grid.
As the supplement of above-mentioned technical proposal, step 2) includes step：
21) since the possibility of the grid collapses of exchange side is far above DC side, acquiescence failure occurs to match somebody with somebody in exchange
Power grid；After breaking down, the position where failure generation section is read in；
22) according to step 21) the data obtained, pass through traversal step 12) obtained by improvement adjacency matrix determine dead electricity region.
As the supplement of above-mentioned technical proposal, step 3) includes step：
31) optimized variable of service restoration optimization problem model is determined；
32) the dead electricity region according to obtained by step 22), the recovery total amount of dead electricity load in the region is maximized as excellent
Change object function；
33) every constraint equation of AC distribution net is established；
34) constraint equation is established to DC distribution net；
35) constraint equation is established to VSC transverter nodes.
As the supplement of above-mentioned technical proposal, in step 32), optimization object function is：
Wherein, NsRepresent the node set in dead electricity region；ciRepresent the recovery coefficient c of i dead electricity nodesi,i∈Ns, ci
∈[0,1]；Pi LoadRepresent the load of i dead electricity nodes；
As the supplement of above-mentioned technical proposal, in step 4), the solution of service restoration optimization problem model uses MATLAB
Kit MATPOWER in MIPS solvers,
During solution, it is desirable to provide optimization object function, the initial value x0 of optimized variable x, all kinds of constraint equations and these
Constraint equation is to the gradient function of optimized variable x and the Hessian matrix of LagrangianL(matrix function form).
As the supplement of above-mentioned technical proposal, in step 5),
Service restoration result includes total amount of recoveryWith the recovery coefficient c of each dead electricity nodei,i∈Ns, Ns
Represent the set of node in dead electricity region, ci∈[0,1]；Pi LoadRepresent the load of i dead electricity nodes；Control decision amount includes VSC
The injection active power and reactive power of transverter node and power supply node, and the voltage magnitude and phase of VSC transverter nodes
Angle.
It is a further object of the present invention to provide a kind of service restoration system of alternating current-direct current mixing power distribution network, it includes：
Power grid initial primary topology establishes unit：Prestore all kinds of parameters of alternating current-direct current mixing power distribution network, in distribution network system
In establish power grid initial primary topology, and operationally record network load situation in real time；
Fault information collection unit：Collect fault message, locking dead electricity region；
Optimization problem model foundation unit：Establish service restoration optimization problem model；
Model solution unit：Service restoration optimization problem model is solved using primal-dual interior method；
Output unit：Export service restoration result and control decision amount result.
The invention has the advantages that：
1) service restoration of alternating current-direct current mixing power distribution network is solved the problems, such as using primal-dual interior method, and uses MIPS works
Tool bag facilitates the solution of optimization problem model.
2) function of embedded ADiGator kits institute band in being formed in the problem of primal-dual interior method, without artificial
Derive the differential equation, manpower and time required for enormously simplify optimization problem model solution.
3) since this method is simple and clear, strong robustness, it is allow by simple modifications, with straight suitable for different friendships
Stream mixing power distribution network, has strong applicability.
4) present invention provides the control parameter of system while optimization problem is solved, and facilitates user and is scheduled behaviour
Make.
Embodiment
With reference to embodiment, the invention will be further described.
Embodiment 1
The present embodiment provides a kind of service restoration method of alternating current-direct current mixing power distribution network, it comprises the following steps：
1) prestore all kinds of parameters of alternating current-direct current mixing power distribution network, establishes power grid initial primary topology in systems, and transporting
Network load situation is recorded during row in real time.
11) initialize, typing distribution network data, and establish corresponding database, bag plug wire circuit-switched data storehouse, load database
With nodal community storehouse；
It is each node serial number (and limiting the permitted scope of voltage magnitude) to alternating current-direct current mixing Modeling of Distribution Network, by even
The electric parameter (including line impedance, maximum allowable trend etc.) of each bar circuit of each node is connect by computer incoming line
Database.
12) to exchange side power grid, read step 11) described in data, establish initial topology knot by improving adjacency matrix
Structure.
Read step 11) described in data, power grid initial primary topology is integrated into improvement adjacency matrix, the improvement adjoining
The element of matrix is specific as follows：
Wherein, i is circuit (vj,vk) (represent connecting node vjAnd vkCircuit) call number in track data storehouse
(i.e. circuit (vj,vk) be located at i-th row in track data storehouse)；The figure that power grid represents belongs to non-directed graph, the improvement adjacency matrix
With symmetry, the circuit of connection two element (v corresponding in adjacency matrix is improvedjRow, vkElements A [the v of rowj]
[vk] and vkRow, vjElements A [the v of rowk][vj]) it is i；And (such as the switch disconnected, switch also uses line to the circuit disconnected
The form on road preserves) corresponding two elements are-i；Element there is no circuit is 0；When electric network composition change, certain is such as disconnected
A switch is, it is necessary to the two corresponding element A [v that will improve adjacency matrixj][vk] and A [vk][vj] by original negative on the occasion of being set to
Value；If equally closing some switch, need by two corresponding elements in matrix by negative value be set on the occasion of.
The connection situation of exchange side power grid can be obtained by improving adjacency matrix, can also be promptly after switching manipulation
The matrix is corrected to update the topological structure of network.
13) real-time update, the load value of collection power distribution network.
2) fault message, locking dead electricity region are collected.
Since the possibility of the grid collapses of exchange side is far above DC side, failure is given tacit consent in the present invention and occurs handing over
Flow power distribution network；
21) after breaking down, the position where failure generation section is read in；
22) according to step 21) the data obtained, pass through traversal step 12) obtained by improvement adjacency matrix determine dead electricity region.
3) service restoration optimization problem model x is established.
31) variable of optimization problem is determined
By the recovery coefficient of each node of alternating current-direct current mixing power distribution network, voltage magnitude, voltage phase angle, active injection amount and nothing
Work(injection rate variable as an optimization：
X=[c1,c2,...,cn,V1,V2,...,Vn,θ1,θ2,...,θn,P1,...,Pn,Q1,...,Qn]T；
Wherein ciThe recovery coefficient of expression i nodes, and ifci=1, otherwise ci∈[0,1].Wherein NsRepresent
The node set in dead electricity region obtained by step 22)；θiRepresent the voltage phase angle of i-node；ViRepresent node voltage amplitude, be
Ensure that voltage stabilization need to reliably meet Vi∈ [0.95,1.05] (is specifically shown in explanation in step 33))；PiAnd QiRespectively in No. i section
The active power and reactive power value of point injection, except VSC transverters node and power supply node (in this case for AC network
The node that substation is connected) outside, the P of remaining nodeiAnd QiIt is 0.
32) the dead electricity region according to obtained by step 22), the recovery total amount of dead electricity load in the region is maximized as excellent
Change object function：
Wherein, NsRepresent the node set in dead electricity region；ciRepresent the recovery coefficient of i dead electricity nodes, there is ci∈[0,
1]；Pi LoadRepresent the load of i dead electricity nodes.
33) every constraint equation of AC distribution net is established
The constraint equation of exchange side power distribution network includes equality constraint：Trend equality constraint, and inequality constraints：System is pacified
Full scleronomic constraint (current capacity constrains and voltage constraint)；It specifically can be written as following form：
Equality constraint：
Inequality constraints：
0.95=Vi min≤Vi≤Vi max=1.05
Wherein, ΩiRepresent the node set being connected with node i；Gii,BiiRepresent the self-admittance system in bus admittance matrix
Number, Gij,BijRepresent the transadmittance coefficient in bus admittance matrix；ViAnd VjThe voltage amplitude at node i and node j is represented respectively
Value；Represent the maximum current that the branch of node i and node j compositions is allowed to flow through；θijRepresent between node i and node j
Phase angle difference；PiAnd PjRepresent respectively active at node i and node j；And Qi LoadThe active of load consumption is represented respectively
With it is idle.
34) constraint equation is established to DC distribution net：
BbusΘ+PLoad-Pg=0, it is the trend constraint of DC network；
WhereinMatrix Cf,CtConstituted mode it is as follows：If branch i by
Node j and node k are connected and composed, then Cf[i, j] and Ct[j, k] is 1；b1,...,blFor the series reactance of each bar direct current branch
Derivative, i.e. susceptance；Θ represents voltage phase angle vector；PLoadRepresent the active power of load consumption；PgRepresent having for generator output
Work(power.
35) constraint equation is established to VSC transverter nodes：
Transverter node needs the inequality constraints for meeting its capacity limit, and in order to during service restoration to therefore
The AC network for hindering side provides enough voltage supports introduced control constraints：
Wherein, Si VSCRepresent the maximum capacity of transverter；Pi VSCAnd Qi VSCThe node i from transverter to place is represented respectively
The active power and reactive power (can be on the occasion of or negative value) of injection；WithThe transverter section of failure side is represented respectively
The voltage magnitude and phase angle of point；VrefFor reference voltage, 1.0 are typically set to, for providing voltage support for failure side；θrefFor ginseng
Phase angle is examined, is typically set to 0.
4) use primal-dual interior method solution procedure 3) described in service restoration optimization problem：
The solution of the optimization problem is using the MIPS solvers in the kit MATPOWER of MATLAB, it is desirable to provide target
Function (step 32) is described), the initial value x0 of optimized variable x, all kinds of constraint function (steps 31), 33) -35) it is described), and
These constraint functions are to the gradient function of optimized variable x and the Hessian matrix of LagrangianL(matrix function form).
The expression of LagrangianL is as follows：
L (x, λ, μ, σ)=σ f (x)+λTg(x)+μTh(x)
Wherein, f (x) is the optimization object function described in step 32), and σ is its multiplying factor；G (x) for step 33)-
35) the equality constraints functions set that all Nonlinear Equality Constraineds in are formed, can be written as g (x)=0；Corresponding λ is equation
Constrain multiplier；H (x) is by step 33) -35) in the inequality constraints function set that forms of all nonlinear complementary problems,
It is written as h (x)≤0；Corresponding μ is equality constraint multiplier；λ, μ, σ can be obtained after solving the optimization problem by MIPS solvers
Occurrence.
As it can be seen that for an alternating current-direct current mixing distribution network system for containing certain number of nodes, it is each according to manual calculations
The gradient function of class constraint function and the Hessian matrix of Lagrangian, can make it that process is very cumbersome, needs consumption is big
Measure manpower；Therefore ADiGator is used, an automatic differential kit based on MATLAB realizes that the automatic of the differential calculates：
41) new uncertain variables λ and μ are established, differentiation function λ is treated so as to establishTG (x) and μTh(x)。
42) two described in step 41) are obtained respectively by the adigatorGenHesFile of ADiGator kits to treat
The Hessian matrix of differentiation functionWith
43) the optimization aim letter described in step 32) is obtained by the adigatorGenJacFile of ADiGator kits
Several single order partial derivativesIt is null matrix to be apparent from its second order partial derivative, without calculating.
44) gained matrix function, the Hessian matrix of the LagrangianL of calculation optimization problem according to step 42) and 43)
Specifically, which is：
45) the initial value x0 of optimized variable x is determined：
X0=[c1,0,...,cn,0,V1,0,...,Vn,0,θ1,0,...,θn,0,P1,0,...,Pn,0,Q1,0,...,Qn,0]T, can
To be further written as
X0=[C0, V0, Θ 0, P0, Q0], wherein
The 1 of V0 is voltage perunit value；Corresponding element is 0 in addition to transverter node and power supply node in P0, Q0；Θ
0 represents the set of phase difference of voltage；PgAnd QgThe active and idle of generator injection is represented respectively.
46) step 33) -35 is arranged) Linear Constraint, establish coefficient matrices A and determine coefficient l and u so that linear restriction
It can be expressed as l≤Ax≤u.
47) by step 41) -46) obtained by each class function, equation etc. be supplied to MIPS to solve.
5) result is exported：Result containing service restoration exports and the output of control decision amount result；
Service restoration result includes total amount of recoveryWith the recovery coefficient c of each dead electricity nodei,i∈Ns；
Control decision amount includes the injection active power and reactive power of VSC transverters node and power supply node, and VSC transverter sections
The voltage magnitude and phase angle of point；
The output result can provide the reference of service restoration optimum results to the user, while help user to realize that power distribution network exists
Rational management under service restoration situation.
Embodiment 2
The present embodiment provides a kind of service restoration system of alternating current-direct current mixing power distribution network, it includes：
Power grid initial primary topology establishes unit：Prestore all kinds of parameters of alternating current-direct current mixing power distribution network, in distribution network system
In establish power grid initial primary topology, and operationally record network load situation in real time；
Fault information collection unit：Collect fault message, locking dead electricity region；
Optimization problem model foundation unit：Establish service restoration optimization problem model；
Model solution unit：Service restoration optimization problem model is solved using primal-dual interior method；
Output unit：Export service restoration result and control decision amount result.
The basic principles, main features and the advantages of the invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (10)
1. the service restoration method of alternating current-direct current mixing power distribution network, it is characterised in that including step：
1) prestore all kinds of parameters of alternating current-direct current mixing power distribution network, establishes power grid initial primary topology in distribution network system, and
Network load situation is recorded during operation in real time；
2) fault message, locking dead electricity region are collected；
3) service restoration optimization problem model is established；
4) use primal-dual interior method solution procedure 3) described in service restoration optimization problem model；
5) service restoration result and control decision amount result are exported.
2. the service restoration method of alternating current-direct current mixing power distribution network according to claim 1, it is characterised in that step 1) includes
Step：
11) initialize, typing distribution network data, and establish corresponding database, database includes track data storehouse, load data
Storehouse and nodal community storehouse；
12) to exchange side power grid, read step 11) described in data, establish initial primary topology by improving adjacency matrix；
13) real-time update, collects the load value of power distribution network.
3. the service restoration method of alternating current-direct current mixing power distribution network according to claim 2, it is characterised in that step 11)
Particular content is：
To alternating current-direct current mixing Modeling of Distribution Network, for each node serial number and the permitted scope of voltage magnitude is limited, each section will be connected
The electric parameter of each bar circuit of point passes through computer incoming line database.
4. the service restoration method of alternating current-direct current mixing power distribution network according to claim 2, it is characterised in that step 12)
Particular content is：
Read step 11) described in data, power grid initial primary topology is integrated into improvement adjacency matrix, the improvement adjacency matrix
Element it is specific as follows：
Wherein, vj、vkRepresent node；I is circuit (vj,vk) call number in track data storehouse；E (V) represents node connection side
Set；Circuit (vj,vk) represent connecting node vjAnd vkCircuit；
The improvement adjacency matrix has a symmetry, the circuit of connection two elements As corresponding in adjacency matrix is improved
[vj][vk] and A [vk][vj] it is i；And the corresponding two elements A [v of circuit disconnectedj][vk] and A [vk][vj] it is-i；No
Element there are circuit is 0；When electric network composition change, some switch is such as disconnected, it is necessary to which two correspondences of adjacency matrix will be improved
Elements A [vj][vk] and A [vk][vj] by original on the occasion of being set to negative value；Equally, some switch is such as closed, then needs to improve
Two corresponding element A [v in adjacency matrixj][vk] and A [vk][vj] by negative value be set on the occasion of；
The connection situation of exchange side power grid is obtained by improving adjacency matrix, improvement adjoining is promptly corrected after switching manipulation
Matrix, to update the topological structure of power grid.
5. the service restoration method of alternating current-direct current mixing power distribution network according to claim 2, it is characterised in that step 2) includes
Step：
21) since the possibility of the grid collapses of exchange side is far above DC side, acquiescence failure occurs in AC distribution net；
After breaking down, the position where failure generation section is read in；
22) according to step 21) the data obtained, pass through traversal step 12) obtained by improvement adjacency matrix determine dead electricity region.
6. the service restoration method of alternating current-direct current mixing power distribution network according to claim 5, it is characterised in that step 3) includes
Step：
31) optimized variable of service restoration optimization problem model is determined；
32) the dead electricity region according to obtained by step 22), mesh as an optimization is maximized by the recovery total amount of dead electricity load in the region
Scalar functions；
33) every constraint equation of AC distribution net is established；
34) constraint equation is established to DC distribution net；
35) constraint equation is established to VSC transverter nodes.
7. the service restoration method of alternating current-direct current mixing power distribution network according to claim 6, it is characterised in that in step 32),
Optimization object function is：
Wherein, NsRepresent the node set in dead electricity region；ciRepresent the recovery coefficient c of i dead electricity nodesi,i∈Ns, ci∈[0,
1]；Pi LoadRepresent the load of i dead electricity nodes.
8. the service restoration method of alternating current-direct current mixing power distribution network according to claim 6, it is characterised in that in step 4),
The solution of service restoration optimization problem model uses the MIPS solvers in the kit MATPOWER of MATLAB,
During solution, it is desirable to provide optimization object function, the initial value x0 of optimized variable x, all kinds of constraint equations and these constraints
Equation is to the gradient function of optimized variable x and the Hessian matrix of LagrangianL
9. according to the service restoration method of claim 1-8 any one of them alternating current-direct current mixing power distribution networks, it is characterised in that step
It is rapid 5) in,
Service restoration result includes total amount of recoveryWith the recovery coefficient c of each dead electricity nodei,i∈Ns, NsRepresent
Set of node in dead electricity region, ci∈[0,1]；Pi LoadRepresent the load of i dead electricity nodes；Control decision amount includes the VSC changes of current
The injection active power and reactive power of device node and power supply node, and the voltage magnitude and phase angle of VSC transverter nodes.
10. the service restoration system of alternating current-direct current mixing power distribution network, it is characterised in that including：
Power grid initial primary topology establishes unit：Prestore all kinds of parameters of alternating current-direct current mixing power distribution network, is built in distribution network system
Vertical power grid initial primary topology, and network load situation is operationally recorded in real time；
Fault information collection unit：Collect fault message, locking dead electricity region；
Optimization problem model foundation unit：Establish service restoration optimization problem model；
Model solution unit：Service restoration optimization problem model is solved using primal-dual interior method；
Output unit：Export service restoration result and control decision amount result.
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| CN113010988A (en) * | 2021-04-13 | 2021-06-22 | 中国农业大学 | Post-disaster optimization recovery method and system for AC/DC hybrid power distribution network |
| CN113162026A (en) * | 2021-03-16 | 2021-07-23 | 中国农业大学 | VSC-based AC/DC hybrid power distribution network fault recovery method and system |
| CN114156847A (en) * | 2021-12-08 | 2022-03-08 | 国网辽宁省电力有限公司朝阳供电公司 | Power distribution network ground fault hybrid optimization decision processing method |
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