CN109683036B - Power distribution system fault simulation method and system for data center - Google Patents

Power distribution system fault simulation method and system for data center Download PDF

Info

Publication number
CN109683036B
CN109683036B CN201811443142.XA CN201811443142A CN109683036B CN 109683036 B CN109683036 B CN 109683036B CN 201811443142 A CN201811443142 A CN 201811443142A CN 109683036 B CN109683036 B CN 109683036B
Authority
CN
China
Prior art keywords
node
nodes
fault
distribution system
current
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201811443142.XA
Other languages
Chinese (zh)
Other versions
CN109683036A (en
Inventor
康春建
刘鑫沛
陈苏
涂波
苗权
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Computer Network and Information Security Management Center
Original Assignee
National Computer Network and Information Security Management Center
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by National Computer Network and Information Security Management Center filed Critical National Computer Network and Information Security Management Center
Priority to CN201811443142.XA priority Critical patent/CN109683036B/en
Publication of CN109683036A publication Critical patent/CN109683036A/en
Application granted granted Critical
Publication of CN109683036B publication Critical patent/CN109683036B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F18/00—Pattern recognition
    • G06F18/20—Analysing
    • G06F18/24—Classification techniques

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Data Mining & Analysis (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Evolutionary Biology (AREA)
  • Evolutionary Computation (AREA)
  • Bioinformatics & Computational Biology (AREA)
  • General Engineering & Computer Science (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)

Abstract

The invention discloses a power distribution system fault simulation method and system for a data center, belongs to the technical field of power analysis, and can dynamically simulate a fault node in a power distribution system and simulate a stable working path of an output power distribution system. The method comprises the following steps: step S1, acquiring an initial working path of the power distribution system, then acquiring a fault node vr in the power distribution system in real time and updating the fault node vr into a fault node set Tr; step S2, calculating the sub-node sets Sm corresponding to the fault nodes vr in the fault node set Tr one by one based on a node search algorithm; step S3, checking each child node m in sequence; step S4, continuously monitoring whether a new fault node appears in the power distribution system; and step S5, calculating and checking whether the three-phase current passing through each node in the current working path in the power distribution system meets the use condition, and if all the nodes meet the use condition, defining the current working path of the power distribution system as a stable working path for output.

Description

Power distribution system fault simulation method and system for data center
Technical Field
The invention relates to the technical field of power analysis, in particular to a power distribution system fault simulation method and system for a data center.
Background
With the rapid development of technologies such as internet, cloud computing, artificial intelligence and the like, the infrastructure construction scale of the data center is larger and larger, and once a power failure fault occurs to the data center, the development of network services is greatly influenced, so that the data center has a self-evident requirement on the reliability of a power distribution system; the data center power distribution system is different from a power distribution system under a traditional application scene, automatic switching electrical equipment such as interconnection switches, ATS switches and STS switches are largely used for the power distribution system of the data center based on the consideration of redundancy and mutual backup, so that the power distribution system of the data center can have a nonlinear fault diffusion characteristic when a fault occurs, and the stable operation of the data center is further ensured.
On the other hand, the distribution system of the data center has the characteristic of nonlinear fault diffusion, so that when a single fault occurs, not only a single load power failure may be caused, but also overload tripping caused by load increase of adjacent circuit breakers may be caused, and then a cascading fault effect of the distribution system is caused, so that the occurrence of the fault is unpredictable and extremely difficult to predict and prevent by a power system person in advance.
Disclosure of Invention
The invention aims to provide a power distribution system fault simulation method and system for a data center, which can dynamically simulate a fault node in a power distribution system and simulate a stable working path of an output power distribution system.
In order to achieve the above object, an aspect of the present invention provides a method for fault simulation of a power distribution system for a data center, the power distribution system including nodes, UPS power supplies, and load devices, the method comprising:
step S1, acquiring an initial working path of the power distribution system, and then acquiring a fault node v in the power distribution system in real timerAnd updating the data into a failure node set Tr;
step S2, calculating each fault node v in the fault node set Tr one by one based on a node search algorithmrCorresponding set of child nodes SmThe set of child nodes SmComprises at least one child node m;
step S3, checking each child node m in sequence, synchronously updating the child node m to a failure node set Tr when a non-failure father node corresponding to the child node m does not exist, and switching the child node m to one of non-failure father nodes when the non-failure father node corresponding to the child node m exists;
step S4, continuously monitoring whether a new fault node appears in the power distribution system, and if so, determining the new fault node vrUpdating to the fault node set Tr, returning to the step S2, and if the fault node set Tr does not exist, executing the step S5;
and step S5, calculating and checking whether the three-phase current passing through each node in the current working path in the power distribution system meets the use condition, if not, adding the node into the fault node set Tr and returning to the step S2, and if all the nodes meet, defining the current working path of the power distribution system as a stable working path to be output.
Preferably, the step S5 includes:
step S51, identifying the working path of each load device from the current working path in the power distribution system, analyzing the load devices corresponding to each UPS power supply, and calculating the input current of each UPS power supply;
step S52, dividing each node in the current working path into a first type node and a second type node, wherein the first type node comprises a node between a UPS power supply and a power grid, and the second type node comprises a node between the UPS power supply and a load device;
step S53, according to the superposition theorem, the input current corresponding to the UPS power supply connected with each node in the first class of nodes is superposed to obtain the load capacity of the corresponding node; according to the superposition theorem, the working currents of the load devices communicated with the nodes in the second class of nodes are superposed to obtain the load capacity of the corresponding node;
and step S54, converting the three-phase current of each node according to the load of each node in the first class of nodes and the second class of nodes, judging whether the three-phase current in the node is smaller than the trip current setting value of the corresponding node, if the judgment result is true, indicating that the node meets the use condition, if the judgment result is false, indicating that the node does not meet the use condition, adding the node into the fault node set Tr, returning to the step S2, and outputting the current working path of the power distribution system as a stable working path until each node meets the use condition.
Preferably, in step S51, the method for calculating the input current of the UPS power supply includes:
is calculated by formula
Figure BDA0001885127090000031
Calculating the input current of the UPS u;
wherein the content of the first and second substances,
Figure BDA0001885127090000032
representing the input of the UPS source uCurrent value, LiRepresents the operating current, theta, of a load device i connected to the UPS source uiIs the power factor angle, theta, of the load device iuIs the power factor angle, η, of the UPS source uuN is the number of loads connected to the back end of the UPS u.
Specifically, the method for converting the three-phase current of each node according to the load of each node in the first class of nodes and the second class of nodes and judging whether each phase current in the node is smaller than the trip current setting value of the corresponding node comprises the following steps:
converting the load of the node j into a-phase working current corresponding to each node
Figure BDA0001885127090000033
b phase working current
Figure BDA0001885127090000034
c-phase working current
Figure BDA0001885127090000035
Determine in node j
Figure BDA0001885127090000036
Figure BDA0001885127090000037
Figure BDA0001885127090000038
Whether the three phases are simultaneously established or not is judged, and when the three phases are simultaneously established, the three-phase current of the node j is determined to be smaller than the trip current setting value of the corresponding node;
wherein, IαTrip current setting value, N, corresponding to node jεNumber of loads connected to the rear end of node j, θaThe power factor angle of the a-phase current corresponding to node j, thetabB-phase current power factor angle, θ, for node jcC-phase current corresponding to node jPower factor angle.
Illustratively, the node search algorithm is a node depth-first search algorithm or a node breadth-first search algorithm.
Compared with the prior art, the power distribution system fault simulation method for the data center has the following beneficial effects:
in the method for simulating the fault of the power distribution system for the data center, firstly, an initial working path of the power distribution system needs to be obtained, then, the working state of each node in the initial working path is monitored in real time, and when the normal working node is monitored to be changed into a fault node vrThen, automatically aiming at the fault node vrSwitching to form a stable current working path, and simultaneously, switching the failed node vrUpdating the fault nodes into a fault node set Tr, and calculating each fault node v in the fault node set Tr one by one based on a node search algorithmrCorresponding set of child nodes SmTo analyze the failed node vrThe method comprises the steps of carrying out calibration on father nodes corresponding to child nodes m respectively after influences on child nodes/load devices connected with the child nodes/load devices are influenced, automatically switching the child nodes m and the non-fault father nodes when the number of the father nodes corresponding to the child nodes m is more than 1 and the switchable non-fault father nodes exist in the father nodes, and when the number of the father nodes corresponding to the child nodes m is only 1, if the father nodes are in fault, the child nodes m are powered off, so that the child nodes m can be regarded as fault nodes to be added into a fault node set Tr, repeating the steps until no new fault nodes are added, indicating that a current working path is temporarily in a stable state, and in addition, after the fault nodes of a power distribution system are simulated, in order to ensure the stability of the simulated current working path in actual operation, also needing to calibrate the load performance of each node in the current working path, adding the selected nodes (regarded as fault nodes) which do not meet the use conditions of passing the three-phase current into a fault node set Tr, returning to the step S2 to continue to screen until all the nodes in the formed current working path have no fault and meet the use conditions of passing the three-phase current, and then, adding the nodes into the fault node set TrThe working path is defined as a stable working path output.
Therefore, the power distribution system fault simulation method for the data center provided by the invention adopts a node search algorithm to calculate each fault node v one by one based on the initial working path of the power distribution systemrCorresponding set of child nodes SmAnd a set S of child nodesmAnd (3) verifying a parent node corresponding to a child node m in the system, updating the child node m causing power failure to a fault node set Tr for recalculation, or switching the child node m not causing power failure with another non-fault parent node to finally form a current working path consisting of non-fault nodes, and then verifying the load performance of each node in the current working path to ensure that each node in the stable working path formed by simulation can meet the use condition of passing three-phase current and meet the reliability requirement of power distribution of a data center.
Another aspect of the present invention provides a power distribution system fault simulation system for a data center, which is applied to the public WIFI network connection method according to the above technical solution, and the system includes:
the device comprises a collecting unit, a calculating unit, a checking unit, a detecting unit and an output unit which are connected in sequence, wherein the output ends of the detecting unit and the output unit are respectively connected with the input end of the calculating unit;
the acquisition unit is used for acquiring an initial working path of the power distribution system and then acquiring a fault node v in the power distribution system in real timerAnd updating the data into a failure node set Tr;
the computing unit is configured to compute each of the faulty nodes v in the faulty node set Tr one by using a node search algorithmrCorresponding set of child nodes SmThe set of child nodes SmComprises at least one child node m;
the verification unit is used for sequentially verifying each child node m, synchronously updating the child nodes m to a fault node set Tr when the non-fault parent nodes corresponding to the child nodes m do not exist, and switching the child nodes m to one of the non-fault parent nodes when the non-fault parent nodes corresponding to the child nodes m exist;
the detection unit is used for continuously monitoring whether a new fault node appears in the power distribution system or not, and if the new fault node appears, the new fault node vrUpdating to a fault node set Tr and awakening the computing unit again, if the fault node set Tr does not exist, awakening the output unit;
and the output unit is used for calculating and verifying whether the three-phase current passing through each node in the current working path in the power distribution system meets the use condition, if not, adding the node into the fault node set Tr and awakening the calculation unit again, and if all the nodes meet, defining the current working path of the power distribution system as a stable working path for output.
Specifically, the output unit comprises an identification calculation module, a node classification module, a load calculation module and an analysis output module which are connected in sequence, wherein the input end of the identification calculation module is connected with the output end of the detection unit, and the output end of the analysis output module is also connected with the input end of the calculation unit;
the identification calculation module is used for identifying the working path of each load device from the current working path in the power distribution system, analyzing the load devices corresponding to each UPS power supply and calculating the input current of each UPS power supply;
the node classification module is used for dividing each node in the current working path into a first class node and a second class node, wherein the first class node comprises a node between a UPS power supply and a power grid, and the second class node comprises a node between the UPS power supply and a load device;
the load calculation module is used for superposing input currents corresponding to the UPS power supply connected with each node in the first class of nodes according to a superposition theorem to obtain the load capacity of the corresponding node; according to the superposition theorem, the working currents of the load devices communicated with the nodes in the second class of nodes are superposed to obtain the load capacity of the corresponding node;
the analysis output module is used for converting three-phase currents of all the nodes according to the load quantities of all the nodes in the first class of nodes and the second class of nodes, judging whether the three-phase currents in the nodes are all smaller than the trip current setting value of the corresponding node, if the judgment result is true, indicating that the node meets the use condition, if the judgment result is false, indicating that the node does not meet the use condition, adding the node into the fault node set Tr and awakening the computing unit again, and outputting the current working path of the power distribution system as a stable working path until all the nodes meet the use condition.
Compared with the prior art, the beneficial effects of the power distribution system fault simulation system for the data center provided by the invention are the same as the beneficial effects of the power distribution system fault simulation method for the data center provided by the technical scheme, and the details are not repeated herein.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic flow chart illustrating a method for simulating a fault of a power distribution system of a data center according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the node types in FIG. 1;
FIG. 3 is a schematic diagram of node state switching in FIG. 1;
fig. 4 is a block diagram of a power distribution system fault simulation system for a data center according to a second embodiment of the present invention.
Reference numerals:
1-an acquisition unit, 2-a calculation unit;
3-a checking unit and 4-a detecting unit;
5-output unit, 51-recognition calculation module;
52-node classification module, 53-load calculation module;
54-analysis output module.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1 or fig. 4, the present embodiment provides a method for simulating a fault of a power distribution system in a data center, where the power distribution system includes nodes, a UPS power source, and load devices, and the method includes:
step S1, acquiring an initial working path of the power distribution system, and then acquiring a fault node v in the power distribution system in real timerAnd updating the data into a failure node set Tr; step S2, calculating each fault node v in the fault node set Tr one by one based on the node search algorithmrCorresponding set of child nodes SmSet of child nodes SmComprises at least one sub-node m or load device; step S3, checking each child node m in sequence, synchronously updating the child node m to a failure node set Tr when a non-failure father node corresponding to the child node m does not exist, and switching the child node m to one non-failure father node when the non-failure father node corresponding to the child node m exists; step S4, continuously monitoring whether a new fault node appears in the power distribution system, and if so, determining the new fault node vrUpdating to the fault node set Tr, returning to the step S2, and if the fault node set Tr does not exist, executing the step S5; and step S5, calculating and checking whether the three-phase current passing through each node in the current working path in the power distribution system meets the use condition, if not, adding the node into the fault node set Tr and returning to the step S2, and if all the nodes meet, defining the current working path of the power distribution system as a stable working path to be output. The node search algorithm may adopt a node depth-first search algorithm (DFS algorithm) or a node breadth-first search algorithm (BFS algorithm).
In the method for simulating the fault of the power distribution system in the data center, firstly, the fault needs to be simulatedAcquiring an initial working path of a power distribution system, monitoring the working state of each node in the initial working path in real time, and changing a normal working node into a fault node v when monitoring that the normal working node is changed into a fault node vrThen, automatically aiming at the fault node vrSwitching to form a stable current working path, and simultaneously, switching the failed node vrUpdating the fault nodes into a fault node set Tr, and calculating each fault node v in the fault node set Tr one by one based on a node search algorithmrCorresponding set of child nodes SmTo analyze the failed node vrThe method comprises the steps of carrying out calibration on father nodes corresponding to child nodes m respectively after influences on child nodes/load devices connected with the child nodes/load devices are influenced, automatically switching the child nodes m and the non-fault father nodes when the number of the father nodes corresponding to the child nodes m is more than 1 and the switchable non-fault father nodes exist in the father nodes, and when the number of the father nodes corresponding to the child nodes m is only 1, if the father nodes are in fault, the child nodes m are powered off, so that the child nodes m can be regarded as fault nodes to be added into a fault node set Tr, repeating the steps until no new fault nodes are added, indicating that a current working path is temporarily in a stable state, and in addition, after the fault nodes of a power distribution system are simulated, in order to ensure the stability of the simulated current working path in actual operation, also needing to calibrate the load performance of each node in the current working path, and adding the screened nodes (regarded as fault nodes) which do not meet the use conditions of passing the three-phase current into a fault node set Tr, returning to the step S2 to continue screening until all the nodes in the formed current working path have no fault and meet the use conditions of passing the three-phase current, and defining the working path of the power distribution system at the moment as a stable working path to be output.
As can be seen, the power distribution system fault simulation method for the data center provided by this embodiment calculates each fault node v one by adopting a node search algorithm based on the initial working path of the power distribution systemrCorresponding set of child nodes SmAnd a set S of child nodesmThe parent node corresponding to the child node m in the system is checked, and the child node m causing the power failure is updated toAnd recalculating the fault node set Tr, or switching the child node m which cannot cause power failure with another non-fault parent node to finally form a current working path consisting of non-fault nodes, and then verifying the load performance of each node in the current working path to ensure that each node in the stable working path formed by simulation can meet the use condition of passing three-phase current and meet the reliability requirement of power distribution of a data center.
It is to be understood that the parent node and the child node in the above embodiments are named temporarily for convenience of describing the reference relationship between the connected nodes, and the nature of the nodes is still the nodes in the power distribution system. In addition, the working path refers to a path tree structure T formed by relative nodes in a power distribution system when load equipment runs, the initial working path refers to a path tree structure T preliminarily given by power workers according to the distribution of nodes of the power distribution system, the current working path refers to a new working path formed after the nodes in the initial working path are switched due to faults, and the stable working path refers to a group of working paths which can meet the power distribution stability requirement of the data center after the path tree structure T formed by the nodes of the power distribution system is subjected to simulation analysis.
Referring to fig. 2, the nodes in the power distribution system of the above embodiment include a single-power-input single-power-output type node τ1Node τ of the single power output type with multiple power inputs, e.g. circuit breaker2Single-power-input multi-power-output type node τ such as ATS and STS3Such as multiple loads connected to the output terminals of a circuit breaker; as shown in FIG. 3, if node a fails, when the child node b of node a is τ1Or τ3In the case of the type structure, the power loss of the sub-node b (including the sub-node or the load connected to the sub-node b) is caused, when the sub-node b of the node a is τ2In the case of the structure, the child node b can be automatically switched to the non-fault parent node c, and a new path is switched to ensure that the child node b can be powered, namely T in the graph1State switching to T2The state, after that, each node in the current path needs to be checked, if the load performance of the non-fault parent node c does not meet the use condition, the child node b will be separated from the parent node c, namely, the child node b is separated from the parent node c by T in the graph2State switching to T3State, at which time child node b will continue to lose power.
Specifically, step S5 in the above embodiment includes:
step S51, identifying the working path of each load device from the current working path in the power distribution system, analyzing the load devices corresponding to each UPS power supply, and calculating the input current of each UPS power supply; step S52, dividing each node in the current working path into a first class node and a second class node, wherein the first class node comprises a node between a UPS power supply and a power grid, and the second class node comprises a node between the UPS power supply and a load device; step S53, according to the superposition theorem, the input current corresponding to the UPS power supply connected with each node in the first class of nodes is superposed to obtain the load capacity of the corresponding node; according to the superposition theorem, the working currents of the load devices communicated with the nodes in the second class of nodes are superposed to obtain the load capacity of the corresponding node; and step S54, converting the three-phase current of each node according to the load of each node in the first class of nodes and the second class of nodes, judging whether the three-phase current in the node is smaller than the trip current setting value of the corresponding node, if the judgment result is true, indicating that the node meets the use condition, if the judgment result is false, indicating that the node does not meet the use condition, adding the node into the fault node set Tr, returning to the step S2, and outputting the current working path of the power distribution system as a stable working path until each node meets the use condition.
In specific implementation, the working paths corresponding to each load device in the power distribution system are firstly identified, the UPS power supply supplying power for each working path is analyzed, the input current of each UPS power supply is respectively calculated, classifying the nodes according to the positions of the nodes in the power distribution system, classifying the nodes between the UPS power supply and the power grid into a first class of nodes, classifying the nodes between the UPS power supply and the load equipment into a second class of nodes, then, according to the superposition theorem, the working currents of the load devices connected with the nodes in the second class of nodes are superposed to obtain the load capacity of the corresponding node, when the load capacity of each node in the second class of nodes is calculated, the UPS power supply can be directly regarded as load equipment, the input current corresponding to the UPS power supply connected with each node in the first class of nodes is superposed according to the superposition theorem, and the load capacity of each node is calculated; next, the load of each node in the first class node and the second class node needs to be converted into a corresponding three-phase current value, when the three-phase current value in the node is smaller than a trip current setting value, it indicates that the node can meet the load requirement, i.e., the node does not trip in actual operation, and when the three-phase current value in the node is not smaller than the trip current setting value, it indicates that the node cannot meet the load requirement in actual operation, i.e., the node trips in actual operation, in which the trip node needs to be regarded as a fault node, added into the fault node set Tr, and the step S2 is executed again to form a new working path, and the current working path is output as a stable working path until each node in the new working path can meet the load requirement.
According to the implementation process, the stable working path is finally formed through screening out the fault nodes in the power distribution system and verifying the load performance of each node, and because the screening out of the fault nodes and the verifying of the load performance of the nodes are simulated based on the actual operation load calculation of the load equipment, the obtained stable working path can meet the operation requirement of the actual working condition.
In addition, because the UPS power source is a nonlinear load, the method for calculating the input current of the UPS power source is different from the method for calculating the input current of the linear load, and the linear load usually calculates the input current by using the superposition theorem, while the input current of the nonlinear load needs to be calculated by using the following formula:
Figure BDA0001885127090000101
wherein the content of the first and second substances,
Figure BDA0001885127090000111
indicates the input current value, L, of the UPS power supply uiRepresents the operating current, theta, of a load device i connected to the UPS source uiIs the power factor angle, theta, of the load device iuIs the power factor of UPS power supply uAngle of rotation, ηuN is the number of loads connected to the back end of the UPS u. During the actual operation, thetai、θuAnd ηuAre known parameters and n represents the number of load devices connected to the UPS power source u.
Further, in step S54 of the foregoing embodiment, the method for converting the three-phase current of each node according to the load amount of each node in the first class of node and the second class of node, and determining whether each phase current in the node is smaller than the trip current setting value of the corresponding node includes:
converting the load of the node j into a-phase working current corresponding to each node
Figure BDA0001885127090000112
b phase working current
Figure BDA0001885127090000113
c-phase working current
Figure BDA0001885127090000114
Determine in node j
Figure BDA0001885127090000115
Figure BDA0001885127090000116
Figure BDA0001885127090000117
Whether the three phases are simultaneously established or not is judged, and when the three phases are simultaneously established, the three-phase current of the node j is determined to be smaller than the trip current setting value of the corresponding node;
wherein, IαTrip current setting value, N, corresponding to node jεNumber of loads connected to the rear end of node j, θaThe power factor angle of the a-phase current corresponding to node j, thetabB-phase current power factor angle, θ, for node jcThe c-phase current power factor angle corresponding to node j. In the actual operationIn the process, thetaa、θbAnd theta are known parameters. The conversion of the three-phase current value by the load amount of the node j is a calculation method well known to those skilled in the art, and therefore, this embodiment will not be described in detail.
Example two
Referring to fig. 1 and fig. 4, the present embodiment provides a power distribution system fault simulation system for a data center, including an acquisition unit 1, a calculation unit 2, a verification unit 3, a detection unit 4, and an output unit 5, which are connected in sequence, wherein output ends of the detection unit 4 and the output unit 5 are further connected to an input end of the calculation unit 2 respectively;
the acquisition unit 1 is used for acquiring an initial working path of the power distribution system and then acquiring a fault node v in the power distribution system in real timerAnd updating the data into a failure node set Tr;
a calculating unit 2 for calculating each fault node v in the fault node set Tr one by adopting a node searching algorithmrCorresponding set of child nodes SmSet of child nodes SmComprises at least one child node m;
the verification unit 3 is used for sequentially verifying each child node m, synchronously updating the child nodes m to a failure node set Tr when the non-failure parent nodes corresponding to the child nodes m do not exist, and switching the child nodes m to one of the non-failure parent nodes when the non-failure parent nodes corresponding to the child nodes m exist;
a detection unit 4, configured to continuously monitor whether a new fault node occurs in the power distribution system, and if so, determine a new fault node vrUpdating to a fault node set Tr and awakening the computing unit again, if the fault node set Tr does not exist, awakening the output unit;
and the output unit 5 is used for calculating and verifying whether the three-phase current passing through each node in the current working path in the power distribution system meets the use condition, if not, adding the node into the fault node set Tr and awakening the calculation unit again, and if all the nodes meet, defining the current working path of the power distribution system as a stable working path for output.
Specifically, the output unit comprises an identification calculation module 51, a node classification module 52, a load calculation module 53 and an analysis output module 54 which are connected in sequence, wherein the input end of the identification calculation module 51 is connected with the output end of the detection unit 4, and the output end of the analysis output module 54 is also connected with the input end of the calculation unit 2;
the identification calculation module 51 is configured to identify a working path of each load device from a current working path in the power distribution system, analyze the load device corresponding to each UPS power supply, and calculate an input current of each UPS power supply;
the node classification module 52 is configured to classify nodes in the current working path into a first class of nodes and a second class of nodes, where the first class of nodes includes nodes from the UPS power source to the power grid, and the second class of nodes includes nodes from the UPS power source to the load device;
the load calculation module 53 is configured to superimpose input currents corresponding to the UPS power supplies connected to the nodes in the first class of nodes according to a superposition theorem to obtain a load amount of the corresponding node; according to the superposition theorem, the working currents of the load devices communicated with the nodes in the second class of nodes are superposed to obtain the load capacity of the corresponding node;
the analysis output module 54 is configured to convert three-phase currents of each node according to a load amount of each node in the first class of nodes and the second class of nodes, determine whether the three-phase currents in the nodes are all smaller than a trip current setting value of the corresponding node, indicate that the node satisfies a use condition if the determination result is true, indicate that the node does not satisfy the use condition if the determination result is false, add the node to the fault node set Tr and re-wake up the calculation unit 2 at this time, and output the current working path of the power distribution system as a stable working path until each node satisfies the use condition.
Compared with the prior art, the beneficial effects of the power distribution system fault simulation system for the data center provided by the embodiment of the invention are the same as the beneficial effects of the power distribution system fault simulation method for the data center provided by the embodiment one, and other technical characteristics in the system are the same as those disclosed by the embodiment method, which are not repeated herein.
It will be understood by those skilled in the art that all or part of the steps in the method for implementing the invention may be implemented by hardware instructions related to a program, the program may be stored in a computer-readable storage medium, and when executed, the program includes the steps of the method of the embodiment, and the storage medium may be: ROM/RAM, magnetic disks, optical disks, memory cards, and the like.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (5)

1. A method of fault simulation for a power distribution system for a data center, the power distribution system including nodes, UPS power sources, and load devices, the method comprising:
step S1, acquiring an initial working path of the power distribution system, and then acquiring a fault node v in the power distribution system in real timerAnd updating the data into a failure node set Tr;
step S2, calculating each fault node v in the fault node set Tr one by one based on a node search algorithmrCorresponding set of child nodes SmThe set of child nodes SmComprises at least one child node m;
step S3, checking each child node m in sequence, synchronously updating the child node m to a failure node set Tr when a non-failure father node corresponding to the child node m does not exist, and switching the child node m to one of non-failure father nodes when the non-failure father node corresponding to the child node m exists;
step S4, continuously monitoring whether a new fault node appears in the power distribution system, and if so, determining the new fault node vrUpdating to the fault node set Tr, returning to the step S2, and if the fault node set Tr does not exist, executing the step S5;
step S5, calculating and checking whether the three-phase current passing through each node in the current working path in the power distribution system meets the use condition, if not, adding the node into the fault node set Tr and returning to the step S2, and if all the nodes meet, defining the current working path of the power distribution system as a stable working path to be output;
step S51, identifying the working path of each load device from the current working path in the power distribution system, analyzing the load devices corresponding to each UPS power supply, and calculating the input current of each UPS power supply;
step S52, dividing each node in the current working path into a first type node and a second type node, wherein the first type node comprises a node between a UPS power supply and a power grid, and the second type node comprises a node between the UPS power supply and a load device;
step S53, according to the superposition theorem, superposing the input current corresponding to the UPS power supply connected with each node in the first class of nodes to obtain the load amount corresponding to the node; according to the superposition theorem, the working current of the load equipment communicated with each node in the second class of nodes is superposed to obtain the load capacity corresponding to the node;
and step S54, converting the three-phase current of each node according to the load of each node in the first class of nodes and the second class of nodes, judging whether the three-phase current in the node is smaller than the trip current setting value of the corresponding node, if the judgment result is true, indicating that the node meets the use condition, if the judgment result is false, indicating that the node does not meet the use condition, adding the node into the fault node set Tr, returning to the step S2, and outputting the current working path of the power distribution system as a stable working path until each node meets the use condition.
2. The method of claim 1, wherein in step S51, the method for calculating the input current of the UPS power supply comprises:
is calculated by formula
Figure FDA0002902041560000021
Calculating the input current of the UPS u;
wherein the content of the first and second substances,
Figure FDA0002902041560000022
indicates the input current value, L, of the UPS power supply uiRepresents the operating current, theta, of a load device i connected to the UPS source uiIs the power factor angle, theta, of the load device iuIs the power factor angle, η, of the UPS source uuN is the number of loads connected to the back end of the UPS u.
3. The method according to claim 1, wherein in step S54, the method for converting the three-phase current of each node according to the load of each node in the first class of nodes and the second class of nodes and determining whether each phase current in the node is smaller than the trip current setting value of the corresponding node comprises:
converting the load of the node j into a-phase working current corresponding to each node
Figure FDA0002902041560000023
b phase working current
Figure FDA0002902041560000024
c-phase working current
Figure FDA0002902041560000025
Determine in node j
Figure FDA0002902041560000026
Figure FDA0002902041560000027
Figure FDA0002902041560000028
Whether or not to simultaneously hold and, when simultaneously held, recognizeThe three-phase current of the fixed node j is smaller than the trip current setting value of the corresponding node;
wherein, IαTrip current setting value, N, corresponding to node jεNumber of loads connected to the rear end of node j, θaThe power factor angle of the a-phase current corresponding to node j, thetabB-phase current power factor angle, θ, for node jcThe c-phase current power factor angle corresponding to node j.
4. The method of claim 1, wherein the node search algorithm is a node depth-first search algorithm or a node breadth-first search algorithm.
5. A power distribution system fault simulation system for a data center is characterized by comprising a collection unit, a calculation unit, a verification unit, a detection unit and an output unit which are sequentially connected, wherein the output ends of the detection unit and the output unit are respectively connected with the input end of the calculation unit;
the acquisition unit is used for acquiring an initial working path of the power distribution system and then acquiring a fault node v in the power distribution system in real timerAnd updating the data into a failure node set Tr;
the computing unit is configured to compute each of the faulty nodes v in the faulty node set Tr one by using a node search algorithmrCorresponding set of child nodes SmThe set of child nodes SmComprises at least one child node m;
the verification unit is used for sequentially verifying each child node m, synchronously updating the child nodes m to a fault node set Tr when the non-fault parent nodes corresponding to the child nodes m do not exist, and switching the child nodes m to one of the non-fault parent nodes when the non-fault parent nodes corresponding to the child nodes m exist;
the detection unit is used for continuously monitoring whether a new fault node appears in the power distribution system or not, and if the new fault node appears, the new fault node vrUpdating to a fault node set Tr and re-awakening the meterThe computing unit wakes up the output unit if the output unit does not appear;
the output unit is used for calculating and verifying whether three-phase current passing through each node in a current working path in the power distribution system meets use conditions, if not, the node is added into a fault node set Tr and the calculation unit is awakened again, and if all the nodes meet the conditions, the current working path of the power distribution system is defined as stable working path output;
the output unit comprises an identification calculation module, a node classification module, a load calculation module and an analysis output module which are sequentially connected, wherein the input end of the identification calculation module is connected with the output end of the detection unit, and the output end of the analysis output module is also connected with the input end of the calculation unit;
the identification calculation module is used for identifying the working path of each load device from the current working path in the power distribution system, analyzing the load devices corresponding to each UPS power supply and calculating the input current of each UPS power supply;
the node classification module is used for dividing each node in the current working path into a first class node and a second class node, wherein the first class node comprises a node between a UPS power supply and a power grid, and the second class node comprises a node between the UPS power supply and a load device;
the load calculation module is used for superposing input currents corresponding to the UPS power supply connected with each node in the first class of nodes according to a superposition theorem to obtain load quantities corresponding to the nodes; according to the superposition theorem, the working current of the load equipment communicated with each node in the second class of nodes is superposed to obtain the load capacity corresponding to the node;
the analysis output module is used for converting three-phase current of each node according to the load of each node in the first class of nodes and the second class of nodes, judging whether the three-phase current in the node is smaller than a trip current setting value of the corresponding node, if the judgment result is true, indicating that the node meets the use condition, if the judgment result is false, indicating that the node does not meet the use condition, adding the node into a fault node set Tr and awakening the computing unit again at the moment, and outputting the current working path of the power distribution system as a stable working path until each node meets the use condition.
CN201811443142.XA 2018-11-29 2018-11-29 Power distribution system fault simulation method and system for data center Active CN109683036B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811443142.XA CN109683036B (en) 2018-11-29 2018-11-29 Power distribution system fault simulation method and system for data center

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811443142.XA CN109683036B (en) 2018-11-29 2018-11-29 Power distribution system fault simulation method and system for data center

Publications (2)

Publication Number Publication Date
CN109683036A CN109683036A (en) 2019-04-26
CN109683036B true CN109683036B (en) 2021-06-29

Family

ID=66185005

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811443142.XA Active CN109683036B (en) 2018-11-29 2018-11-29 Power distribution system fault simulation method and system for data center

Country Status (1)

Country Link
CN (1) CN109683036B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113381874B (en) * 2020-03-10 2023-06-02 上海杰之能软件科技有限公司 Fault signal processing method, storage medium and terminal
CN111541251B (en) * 2020-04-28 2021-11-02 国家计算机网络与信息安全管理中心 Power distribution method and system for micro bus power supply system of data machine room

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103001216A (en) * 2012-03-28 2013-03-27 河海大学 Method for quickly restoring power supply of power distribution network containing distributed power source
CN104518488A (en) * 2014-12-30 2015-04-15 广西大学 Load point fault area type division method for reliability analysis on power distribution network
CN106374456A (en) * 2016-09-14 2017-02-01 国网天津市电力公司 Power supply recovery method of power distribution network comprising distributed power supplies after fault
CN108521123A (en) * 2018-04-26 2018-09-11 福建积微科技有限公司 A kind of visual more contact point distribution network failure section correlating methods

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130049239A (en) * 2011-09-29 2013-05-14 한국전력공사 Apparatus and method for controlling a load of power system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103001216A (en) * 2012-03-28 2013-03-27 河海大学 Method for quickly restoring power supply of power distribution network containing distributed power source
CN104518488A (en) * 2014-12-30 2015-04-15 广西大学 Load point fault area type division method for reliability analysis on power distribution network
CN106374456A (en) * 2016-09-14 2017-02-01 国网天津市电力公司 Power supply recovery method of power distribution network comprising distributed power supplies after fault
CN108521123A (en) * 2018-04-26 2018-09-11 福建积微科技有限公司 A kind of visual more contact point distribution network failure section correlating methods

Also Published As

Publication number Publication date
CN109683036A (en) 2019-04-26

Similar Documents

Publication Publication Date Title
Liu et al. Recognition and vulnerability analysis of key nodes in power grid based on complex network centrality
CN109557422B (en) Intelligent power distribution network short-circuit fault positioning method and system
CN110276532B (en) Power distribution network reliability calculation method based on research of load blocks
CN107220775B (en) Active power distribution network multi-view cooperative vulnerability assessment method considering information system effect
CN111308277B (en) Power distribution network complex fault positioning method based on D-PMU finite node information
CN109683036B (en) Power distribution system fault simulation method and system for data center
Fadul et al. A trust-management toolkit for smart-grid protection systems
CN104103019A (en) Operation risk assessment method and assessment system of power distribution network containing distributed power supply
CN109993665B (en) Online safety and stability assessment method, device and system for power system
CN104750878A (en) Mixed searching strategy-based topology fault diagnosis method
CN110556920A (en) Distribution automation monitoring method, system, terminal and storage medium
CN106548265A (en) A kind of Transmission Network Reliability appraisal procedure based on cascading failure accident chaining search
CN104158174A (en) Electric power system catastrophic accident risk assessment method
CN107134774B (en) Method and system for analyzing reliability of power distribution network with distributed power supply
Krishnan et al. Resilient cyber infrastructure for the minimum wind curtailment remedial control scheme
CN113220751A (en) Metering system and evaluation method for multi-source data state quantity
CN107301479B (en) Natural disaster risk-based multi-scene planning method for power transmission system
CN113987724A (en) Power grid risk identification method and system based on topology analysis
Piesciorovsky et al. Electrical substation grid testbed for DLT applications of electrical fault detection, power quality monitoring, DERs use cases and cyber-events
Correa-Henao et al. Representation of electric power systems by complex networks with applications to risk vulnerability assessment
CN111429043A (en) Voltage sag characteristic quantity random evaluation method based on scene construction
CN115940409A (en) Full-period fault diagnosis method and device for safety control system function test command
CN110797863A (en) Economic dispatching method considering safety constraints of N-1 and N-2 of power grid
CN115456109A (en) Power grid fault element identification method and system, computer equipment and storage medium
CN113177717A (en) Quick evaluation method for toughness of power transmission system based on influence increment sensitivity

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant