CN-122000908-A - Multi-stage power supply recovery method for power distribution system containing reconfigurable soft switch to deal with network-physical cooperative threat

CN122000908ACN 122000908 ACN122000908 ACN 122000908ACN-122000908-A

Abstract

The invention discloses a multi-stage power supply recovery method for a power distribution system containing a reorganizable soft switch to deal with network-physical cooperative threat, which comprises the following steps of 1, establishing a network-physical cooperative threat model to analyze the influence characteristics of the network-physical cooperative threat model on the power distribution system; and 4, converting the multi-stage power supply recovery model of the power distribution system containing the reconfigurable soft switch under the network-physical cooperative threat into a mixed integer second order cone planning constraint and then solving to obtain a power distribution system operation scheme containing the reconfigurable soft switch action and the remote controllable switch. The invention can improve the flexible regulation and control capability and the load recovery level of the system under extreme conditions by coordinating the operation of the remote controllable switch and the reconfigurable soft switch.

Inventors

YANG XIAODONG
LOU WEI
ZHANG SHIHAN
MA JING
LI ZIHAO
YANG YUE
YANG ZHIQING
ZHAO SHUANG
LI HELONG
DING LIJIAN

Assignees

合肥工业大学

Dates

Publication Date: 20260508
Application Date: 20260211

Claims (6)

1. A multi-stage power restoration method for a power distribution system including a reconfigurable soft switch to address a network-physical co-threat, comprising the steps of: step 1, constructing constraint conditions of a multi-stage power supply recovery model of a power distribution system containing a reorganizable soft switch for coping with network-physical cooperative threat; Step 2, constructing an objective function of a multi-stage power supply recovery model of the power distribution system containing the reconfigurable soft switch for coping with network-physical cooperative threat ; And 3, converting a multi-stage power supply recovery model of the power distribution system containing the reconfigurable soft switch for coping with the network-physical cooperative threat into a mixed integer second order cone planning constraint and then solving to obtain an operation scheme of the power distribution system containing the R-SOP action and all switch actions of the reconfigurable soft switch.
2. The multi-stage power restoration method for a power distribution system with a reorganizable soft switch to cope with cyber-physical co-ordination threat of claim 1, wherein the step 1 includes the steps of: step 1.1, obtaining quantitative constraints of the network-physical cooperative threat from the formula (1) -formula (7): (1) (2) (3) (4) (5) (6) (7) In the formulas (1) to (7), Representative of Time node Is a load tampering amount of (a); Representing the magnitude of load tampering; Is the total number of time; representing a power transmission distribution factor matrix; representing tidal flow measurement attack vectors; representing a load measurement attack vector; representing a set of all nodes in the power distribution system; Is that Time node Active power consumed by the load; Representative of Time node 0-1 Integer variable corresponding to the load node of (a); Representative of Time node And node Branches between Corresponding 0-1 integer variable; The number of the set attacked resources is set; Representative of Time branch Transmission power tampering amount; Representative branch 0-1 Integer variable whether physically attacked; representing physical attack resources; Representative of Time branch 0-1 Integer variable whether connected; Step 1.2, obtaining constraint conditions of the recombined soft switch R-SOP from the formulas (8) - (17): (8) (9) (10) (11) (12) (13) (14) (15) (16) (17) In the formulas (8) to (17), 、 Respectively representing a node set communicated with the voltage source converter and a set of all tie switches; The number of the voltage source converters is the number; Represent the first The voltage source converters are arranged in Node for communicating with voltage source converter at moment Are connected; Representation of Node communicated with voltage source converter at moment The state of all the connected tie switches; Representation of Node communicated with voltage source converter at moment The state of all the connected tie switches; Representation of Node communicated with voltage source converter at moment The status of all the tie switches connected; Representative of Node communicated with voltage source converter at moment Maximum apparent power transmitted by all connected feeders; Is the first Capacity of the individual voltage source converters; 、、 respectively represent Time node Active power, reactive power and direct current side power transmitted by all connected voltage source converters; Representative of Time node Active losses on all voltage source converters connected; Is the loss coefficient; Representative of Time of day (time) A plurality of tie switch states; Representative of Node communicated with voltage source converter at moment Is a voltage of (2); Representative of Node communicated with voltage source converter at moment The port opening state of the recombination type intelligent soft switch R-SOP; a reference voltage for the power distribution system; M is a constant; Step 1.3, constructing a switching action constraint condition and a fault state transfer constraint condition of a degradation stage by the formula (18) -formula (20): (18) (19) (20) In the formulae (18) - (20), Representing the degradation stage Time node 0-1 Integer variable whether in a fault state; Representing the degradation stage Time node 0-1 Integer variable whether in a fault state; Representing the stage of degradation Time line 0-1 Variable whether connected; Step 1.4, constructing a switch action constraint condition and a fault state transfer constraint condition of a fault isolation stage by the formulas (21) - (24): (21) (22) (23) (24) In the formulae (21) - (24), Representing the fault isolation stage Time node 0-1 Integer variable whether in a fault state; Representing the fault isolation stage Time node 0-1 Integer variable whether in a fault state; Representing the fault isolation stage Time line 0-1 Variable whether connected; step 1.5, constructing a switching action constraint condition and a fault state transfer constraint condition of a power supply recovery stage by the following formulas (25) - (26): (25) (26) in the formulae (25) to (26), Representing the power restoration stage Time node 0-1 Integer variable whether in a fault state; Representing the power restoration stage Time node 0-1 Integer variable whether in a fault state; Representing the power restoration stage Time line 0-1 Variable whether connected; Representative line Whether to configure the 0-1 variable of the switch; Step 1.6, constructing a virtual power flow constraint condition of power distribution system reconstruction in a power supply recovery stage by the formula (27) -formula (30): (27) (28) (29) (30) in the formulae (27) - (30), Is that Time branch Is a virtual tide of (2); Is that Time node The power flow sent by the virtual power supply is treated; Is a node Is a virtual requirement of (1); the number of the nodes in the power distribution system is the number; Step 1.7, constructing a multi-stage power flow constraint condition of the power distribution system containing the reorganizable soft switch R-SOP for coping with network-physical cooperative threat according to the formula (31) -formula (41): (31) (32) (33) (34) (35) (36) (37) (38) (39) (40) (41) (42) (43) (44) in the formulae (31) to (44), And Respectively is Under the stage Time line Active and reactive power of the upper transmission; And Respectively the lines Resistance and reactance of (a); And Respectively is Under the stage Time node Active and reactive power injected; Is that Under the stage Time node Active load reduction amount of (a) Is that Under the stage Time node Is reduced by the reactive load; Is that Under the stage Time node Is used for the voltage of the (c) transformer, Is that Time line under stage A current transmitted on; 、 Respectively is Time node Photovoltaic active power generation Photovoltaic active power reduction under the stage; Is that Time node Photovoltaic reactive power output is generated; Is that Time node Reactive power consumed by the load; And Is that Under the stage Time node Active and reactive power injected at the R-SOP; Is that Under the stage Time node Active power injected by DG; and (3) with Is a circuit Maximum transmission active and reactive power of (a); and (3) with Maximum and minimum values of node voltage; An upper limit for branch current in the power distribution system; and (3) with Injecting maximum and minimum values of active power into DG; when c=1, then, The phase represents the degradation phase and when c=2, The phase represents a fault isolation phase and when c=3, The phase represents a power restoration phase.
3. The method for recovering power from a power distribution system with reconfigurable soft switch in accordance with claim 2, wherein said step 2 is to construct an objective function from the formula (45) -formula (46) : (45) (46) In the formulae (45) to (46), The moment of the switch action to perform fault isolation is represented; a time point for switching to resume power supply is indicated; indicating the moment when the maintenance personnel starts to operate; Representing the amount of load curtailed during the degradation phase; representing the load amount cut down in the isolation stage; representing the amount of load curtailed during the recovery phase.
4. The multi-stage power restoration method for a power distribution system with a reconfigurable soft switch against cyber-physical co-threat of claim 3, wherein said step 3 comprises the steps of Step 3.1. The method is to And Respectively replaced by two linear variables And And relaxing the formulas (31) -34 and (39) -40) by using a big-M method, thereby obtaining the linear constraint after conversion by using the formulas (47) -52): (47) (48) (49) (50) (51) (52) In the formulae (47) - (52), And Respectively are provided with Under the stage Time node Square of voltage at, Under the stage Time node To the node The middle branch Square of the current of (2); step 3.2 converting equation (50) to a second order cone constraint using equation (53): (53) in the formula (53), T represents a transpose; step 3.3 converting equation (12) to a rotation cone constraint using equation (54): (54)。
5. An electronic device comprising a memory and a processor, wherein the memory is configured to store a program that supports the processor to perform the power restoration method of any one of claims 1-4, the processor being configured to execute the program stored in the memory.
6. A computer readable storage medium having stored thereon a computer program, characterized in that the computer program when executed by a processor performs the steps of the power restoration method according to any of claims 1-4.

Description

Multi-stage power supply recovery method for power distribution system containing reconfigurable soft switch to deal with network-physical cooperative threat Technical Field The invention belongs to the field of operation optimization of power distribution systems, and particularly relates to a multi-stage power supply recovery method for a power distribution system with a reorganizable soft switch, which is used for coping with network-physical cooperative threat. Background In recent years, the electric power system faces increasingly frequent natural disasters and network attacks, so that large-scale outage events are frequent, and the safe and stable operation of the electric power system is seriously threatened. With the deep fusion of the information layer and the physical layer of the power distribution system, the more complex the attack mode is, the more the network-physical cooperative threat becomes the major threat to the operation of the power distribution system. Compared with single type of attack, the network-physical cooperative threat causes more serious impact on the power distribution system through the cooperative action of the network attack and the physical damage. After the power distribution system is attacked, faults on the lines of the power distribution system can spread along a closed line, and the power distribution system often presents the characteristic of stepwise evolution (degradation, isolation and recovery), so that the multi-stage recovery process of the power distribution system needs to be researched. In the research of the recovery strategy of the power system after being subjected to the network-physical cooperative threat, the power supply recovery stage in the whole recovery process of the power distribution system after the attack is usually focused, and the multi-stage recovery process research for the network-physical cooperative threat is not found, so that the unbalance of resource regulation and the reduction of the overall recovery efficiency are further caused. Disclosure of Invention The invention provides a multi-stage power supply restoration method for a power distribution system with a reconfigurable soft switch to cope with network-physical cooperative threat, aiming at realizing effective restoration under the network-physical cooperative threat by coordinating equipment such as the reconfigurable soft switch, the controllable switch and the like to resist the network-physical cooperative threat so as to improve the flexible regulation and control capability and the load restoration level of the system under extreme conditions. In order to achieve the aim of the invention, the invention adopts the following technical scheme: The invention relates to a multi-stage power supply recovery method for a power distribution system containing a reorganizable soft switch to deal with network-physical cooperative threat, which is characterized by comprising the following steps: step 1, constructing constraint conditions of a multi-stage power supply recovery model of a power distribution system containing a reorganizable soft switch for coping with network-physical cooperative threat; Step 2, constructing an objective function of a multi-stage power supply recovery model of the power distribution system containing the reconfigurable soft switch for coping with network-physical cooperative threat ; And 3, converting a multi-stage power supply recovery model of the power distribution system containing the reconfigurable soft switch for coping with the network-physical cooperative threat into a mixed integer second order cone planning constraint and then solving to obtain an operation scheme of the power distribution system containing the R-SOP action and all switch actions of the reconfigurable soft switch. The multi-stage power supply recovery method for the power distribution system containing the recombined soft switch for coping with the network-physical cooperative threat is also characterized in that the step 1 comprises the following steps: step 1.1, obtaining quantitative constraints of the network-physical cooperative threat from the formula (1) -formula (7): (1) (2) (3) (4) (5) (6) (7) In the formulas (1) to (7), Representative ofTime nodeIs a load tampering amount of (a); Representing the magnitude of load tampering; Is the total number of time; representing a power transmission distribution factor matrix; representing tidal flow measurement attack vectors; representing a load measurement attack vector; representing a set of all nodes in the power distribution system; Is that Time nodeActive power consumed by the load; Representative of Time node0-1 Integer variable corresponding to the load node of (a); Representative of Time nodeAnd nodeBranches betweenCorresponding 0-1 integer variable; The number of the set attacked resources is set; Representative of Time branchTransmission power tampering amount; Representative branch 0-1 Integer variabl