CN107994576B - Method for selecting transfer path for private cloud platform verification - Google Patents

Method for selecting transfer path for private cloud platform verification Download PDF

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CN107994576B
CN107994576B CN201711465077.6A CN201711465077A CN107994576B CN 107994576 B CN107994576 B CN 107994576B CN 201711465077 A CN201711465077 A CN 201711465077A CN 107994576 B CN107994576 B CN 107994576B
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transfer
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private cloud
power
transfer path
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CN107994576A (en
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李淑芹
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Guangzhou Yizhi Information Technology Co.,Ltd.
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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
    • H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
    • H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
    • 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]
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/20—Information technology specific aspects, e.g. CAD, simulation, modelling, system security

Abstract

The invention relates to a method for selecting a transfer path for private cloud platform verification, which comprises the following steps: a. establishing a mathematical model; b. solving the mathematical model; c. selecting a transfer path meeting the conditions in a transfer path selection set according to the solving result to form a transfer path selection subset; d. selecting a switching path with the minimum switching operation time T in the switching path selection subset, and outputting the switching path; e. d, transmitting the transfer path output by the step d to a private cloud platform, and performing archive storage after the private cloud platform performs verification and encryption processing on the transfer path; f. and when a transfer demand exists, calling the transfer path from the private cloud platform, and carrying out electric power transfer after carrying out decryption processing. The private cloud platform is used for verifying and encrypting, so that the supply transfer scheme is safer and more stable.

Description

Method for selecting transfer path for private cloud platform verification
Technical Field
The invention relates to a method for selecting a transfer path for private cloud platform verification, in particular to a method for selecting a transfer path for private cloud platform verification, which can ensure the stability and safety of a system during the implementation of the transfer path and afterwards.
Background
The power output and load in the power system are in the process of real-time variation, and the power lines and equipment usually fail due to the influence of external environments, such as wind, rain, thunder, electricity, and self-life, so the power supply is a means commonly used in the power system to re-secure the power supply when power imbalance occurs so that the power reaches the balanced state again.
However, the existing transfer method does not consider the change of the power system before and after transfer, which causes short-time oscillation of the system after the transfer method is implemented, and seriously affects the normal, safe and stable operation of the system. At the same time, it is not considered that the delay period due to the transfer operation may cause further development of the system failure.
Disclosure of Invention
Therefore, in order to solve the above problems, the present invention provides a method for selecting a transfer path for private cloud platform verification, so that the state of the power system after power transfer is similar to the state before power transfer and the operation time is the shortest, thereby ensuring the safety and stability of the power system in the widest time scale.
In order to achieve the above purpose, the invention provides a method for selecting a transfer path for private cloud platform verification, which comprises the following steps:
a. establishing a mathematical model;
b. solving the mathematical model;
c. selecting a transfer path meeting the conditions in a transfer path selection set according to the solving result to form a transfer path selection subset;
d. selecting a switching path with the minimum switching operation time T in the switching path selection subset, and outputting the switching path;
e. d, transmitting the transfer path output by the step d to a private cloud platform, and performing archive storage after the private cloud platform performs verification and encryption processing on the transfer path;
f. and when a transfer demand exists, calling the transfer path from the private cloud platform, and carrying out electric power transfer after carrying out decryption processing.
The private cloud platform verification transfer path selection method comprises the following steps:
setting a switching path selection set S:
S={s1,s2,……，spp is the total number of alternative paths, siRepresents an alternative handover path;
establishing power system PV, PQ node parameter phasor and node voltage phasor:
PV, PQ node parameter phasor
Figure 716015DEST_PATH_IMAGE002
，
Wherein m is the number of PV nodes;
node voltage phasor
Figure DEST_PATH_IMAGE003
，
Wherein the content of the first and second substances,
Figure 7057DEST_PATH_IMAGE005
、
Figure DEST_PATH_IMAGE007
respectively a real part and an imaginary part of the voltage of the node i;
establishing an objective function:
Figure DEST_PATH_IMAGE009
，
wherein the content of the first and second substances,
Figure 396581DEST_PATH_IMAGE010
is the node voltage phasor of the power system at a stable operating point,
Figure DEST_PATH_IMAGE011
in the form of a region coefficient,
Figure DEST_PATH_IMAGE013
and the node voltage phasor region of the power system is corresponding to the stable region around the stable operation point.
The private cloud platform verification transfer path selection method comprises the following steps:
obtaining a real-time switch-over path selection set S0The power monitoring system determines the switching path selection set according to power output, load power, line connection condition, line capacity parameter and switch state, and when one of the power output, the load power, the line connection condition, the line capacity parameter and the switch state changes, the switching path selection set is recalculated to replace the original switching path selection set, so that the switching path selection set can track the specific condition of the power system in real time;
and solving the objective function through an intelligent algorithm to obtain a node voltage phasor region of the power system corresponding to a stable region around the current stable operation point.
The private cloud platform verification transfer path selection method comprises the following steps: selecting set S for the supply path0The power system power flow after power conversion and supply according to the conversion and supply path is simulated to obtain the node voltage phasor of the simulated power system, and whether the node voltage phasor of the simulated power system is in the node voltage phasor region of the power system corresponding to the stable region or not is judgedAnd if the condition is met, putting the transfer path into a transfer path subset.
The private cloud platform verification transfer path selection method comprises the following steps:
establishing a transfer operation time T-qTswitch+(q-1)Tloading，
Wherein q is the number of switches to be operated when power is supplied according to the supply path, TswitchTime consumed for operating 1 switch on average, TloadingThe buffer time is required to be vacated before the next switch is operated after 1 switch is operated.
The private cloud platform verification transfer path selection method comprises the following steps:
d, transmitting the transfer operation time and the number of the transfer operation switches in the step d to a private cloud platform, calling a stored power model in the cloud platform by the private cloud platform, carrying out first verification on the transfer operation time and the number of the transfer operation switches, increasing a certain amount of load after the verification meets the requirement, carrying out simulation verification again, and determining that the transfer operation time and the number of the transfer operation switches determined in the step d are stable transfer schemes if the verification still meets the requirement;
and numbering the transfer supply operation time and the number of the transfer supply operation switches after the detection is finished, and encrypting and storing.
The private cloud platform verification supply transfer path selection method is characterized in that the supply transfer requirement in the step f comprises the permanent fault of a certain line of the power system and the power loss of a certain generator.
The private cloud platform verification transfer path selection method includes that the load quantity increased by a certain amount includes a load quantity increased by 10%.
The private cloud platform verification transfer path selection method comprises the steps that the private cloud platform comprises a network firewall, the network firewall comprises a public firewall and a private firewall, the private firewall accesses data of the private cloud platform based on fingerprint information of a user, and the public firewall is used for a power manager in the previous level to check transfer scheme forming time and whether correct verification is conducted. According to the method, the relevant phasor, the objective function and the operation time are set, so that the operation of the transfer path does not have great influence on the power system, the system fault upgrading caused by the transfer operation is further avoided, and the safety and the stability of the power system are ensured in a widest time scale. The private cloud platform is used for verifying and encrypting, so that the supply transfer scheme is safer and more stable. Through multiple firewall, the security of private cloud platform formation switching scheme can be guaranteed, and security check can be conveniently carried out by higher-level power managers.
Drawings
Fig. 1 is a flowchart of a private cloud platform verified transfer path optimization method.
Detailed Description
Referring to fig. 1, the method for selecting a transfer path for private cloud platform verification includes the following steps:
a. establishing a mathematical model:
setting a switching path selection set S:
S={s1,s2,……，spp is the total number of alternative paths, siRepresents an alternative handover path;
establishing power system PV, PQ node parameter phasor and node voltage phasor:
PV, PQ node parameter phasor
Figure 106304DEST_PATH_IMAGE014
，
Wherein m is the number of PV nodes;
node voltage phasor
Figure 451835DEST_PATH_IMAGE015
，
Wherein the content of the first and second substances,
Figure 539877DEST_PATH_IMAGE016
、
Figure 72489DEST_PATH_IMAGE018
respectively a real part and an imaginary part of the voltage of the node i;
establishing an objective function:
Figure 536969DEST_PATH_IMAGE019
，
wherein the content of the first and second substances,
Figure 471427DEST_PATH_IMAGE021
is the node voltage phasor of the power system at a stable operating point,
Figure 481102DEST_PATH_IMAGE022
in the form of a region coefficient,
Figure DEST_PATH_IMAGE023
a node voltage phasor region of the power system corresponding to a stable region around the stable operation point;
b. solving a mathematical model:
obtaining a real-time switch-over path selection set S0The power monitoring system determines the switching path selection set according to power output, load power, line connection condition, line capacity parameter and switch state, and when one of the power output, the load power, the line connection condition, the line capacity parameter and the switch state changes, the switching path selection set is recalculated to replace the original switching path selection set, so that the switching path selection set can track the specific condition of the power system in real time;
solving an objective function through an intelligent algorithm to obtain a node voltage phasor region of the power system corresponding to a stable region around a current stable operation point;
c. selecting the transfer path meeting the conditions in the transfer path selection set according to the solving result to form a transfer path selection subset:
selecting set S for the supply path0Simulating the power system power flow after power supply according to each transfer path to obtain the node voltage of the simulated power systemMeasuring, judging whether the node voltage phasor of the simulation power system is in a power system node voltage phasor region corresponding to a stable region, if so, putting the switching path into a switching path subset；
d. Selecting a transfer path with the minimum transfer operation time T in the transfer path selection subset, and outputting the transfer path:
establishing a transfer operation time T-qTswitch+(q-1)Tloading，
Wherein q is the number of switches to be operated when power is supplied according to the supply path, TswitchTime consumed for operating 1 switch on average, TloadingThe buffer time is required to be vacated before the next switch is operated after 1 switch is operated;
e. d, transmitting the transfer path output by the step d to a private cloud platform, and performing archive storage after the private cloud platform performs verification and encryption processing on the transfer path;
d, transmitting the transfer operation time and the number of the transfer operation switches in the step d to a private cloud platform, calling a stored power model in the cloud platform by the private cloud platform, carrying out first verification on the transfer operation time and the number of the transfer operation switches, increasing a certain amount of load after the verification meets the requirement, carrying out simulation verification again, and determining that the transfer operation time and the number of the transfer operation switches determined in the step d are stable transfer schemes if the verification still meets the requirement;
and numbering the transfer supply operation time and the number of the transfer supply operation switches after the detection is finished, and encrypting and storing.
f. When a transfer demand exists, carrying out power transfer according to the output transfer path; the supply and demand requirements include permanent fault of a certain line of the power system and power loss of a certain generator.
According to the private cloud platform verification transfer path selection method, the increase of the certain load amount comprises the increase of 10% of the load amount.
The private cloud platform comprises a network firewall, the network firewall comprises a public firewall and a private firewall, the private firewall accesses data of the private cloud platform based on fingerprint information of a user, and the public firewall is used for a power manager in a previous level to check the forming time of a transfer scheme and whether correct verification is carried out.
It should be noted that the above-mentioned embodiments are provided for further detailed description of the present invention, and the present invention is not limited to the above-mentioned embodiments, and those skilled in the art can make various modifications and variations on the above-mentioned embodiments without departing from the scope of the present invention.

Claims (5)

1. A method for selecting a transfer path verified by a private cloud platform is characterized by comprising the following steps:
a. establishing a mathematical model;
b. solving the mathematical model;
c. selecting a transfer path meeting the conditions in a transfer path selection set according to the solving result to form a transfer path selection subset;
d. selecting a switching path with the minimum switching operation time T in the switching path selection subset, and outputting the switching path;
e. d, transmitting the transfer path output by the step d to a private cloud platform, and performing archive storage after the private cloud platform performs verification and encryption processing on the transfer path;
f. when a transfer demand exists, calling the transfer path from the private cloud platform, and carrying out decryption processing and then carrying out power transfer; the step a comprises the following steps:
setting a switching path selection set S:
S＝{s1,s2,……，spp is the total number of alternative paths, siRepresents an alternative handover path, i-1 … … p;
establishing power system PV, PQ node parameter phasor and node voltage phasor:
PV、Pq node parametric phasor
Figure FDA0002670564100000011
Wherein m is the number of PV nodes, and n is the number of nodes of the power system;
node voltage phasor x ═ V1real,…,Vnreal,V1imag,…Vnimag]T，
Wherein, Vireal、ViimagRespectively a real part and an imaginary part of the node voltage;
establishing an objective function:
Figure FDA0002670564100000012
wherein x is0The method comprises the following steps that (1) node voltage phasor of the power system at a stable operation point is obtained, beta is a region coefficient, and deltax is a node voltage phasor region of the power system corresponding to a stable region around the stable operation point;
the step d comprises the following steps:
establishing a transfer operation time T-qTswitch+(q-1)Tloading，
Wherein q is the number of switches to be operated when power is supplied according to the supply path, TswitchTime consumed for operating 1 switch on average, TloadingThe buffer time is required to be vacated before the next switch is operated after 1 switch is operated; the step b comprises the following steps:
obtaining a real-time switch-over path selection set S0The power monitoring system determines the switching path selection set according to power output, load power, line connection condition, line capacity parameter and switch state, and when one of the power output, the load power, the line connection condition, the line capacity parameter and the switch state changes, the switching path selection set is recalculated to replace the original switching path selection set, so that the switching path selection set can track the specific condition of the power system in real time;
solving objects by intelligent algorithmsObtaining a power system node voltage phasor region corresponding to a stable region around a current stable operation point through a function; the step c comprises the following steps: selecting set S for the supply path0The power system power flow after power transfer is carried out according to the transfer path is simulated to obtain the simulated power system node voltage phasor, whether the simulated power system node voltage phasor is in a power system node voltage phasor region corresponding to a stable region or not is judged, and if the conditions are met, the transfer path is put into a transfer path subset.
2. The private cloud platform verified transfer path selection method according to claim 1, wherein step e comprises:
d, transmitting the transfer operation time and the number of the transfer operation switches in the step d to a private cloud platform, calling a stored power model in the cloud platform by the private cloud platform, carrying out first verification on the transfer operation time and the number of the transfer operation switches, increasing a certain amount of load after the verification meets the requirement, carrying out simulation verification again, and determining that the transfer operation time and the number of the transfer operation switches determined in the step d are stable;
and numbering the transfer operation time and the number of the transfer operation switches after the verification is finished, and encrypting and storing.
3. The private cloud platform verified transfer path selection method according to claim 2, wherein the transfer demand in step f includes a permanent fault on a line of the power system and a power loss on a generator.
4. The private cloud platform verified transfer path selection method of claim 3, wherein the increasing the certain amount of load comprises increasing the 10% load amount.
5. The private cloud platform verified transfer path selection method according to claim 2, wherein the private cloud platform comprises a network firewall, the network firewall comprises a public firewall and a private firewall, the private firewall accesses data of the private cloud platform based on fingerprint information of a user, and the public firewall is used for a power manager at a previous level to check transfer scheme formation time and whether correct verification is performed.
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