CN114449374A - High-density distributed power supply communication method, device and medium - Google Patents

High-density distributed power supply communication method, device and medium Download PDF

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CN114449374A
CN114449374A CN202210087231.5A CN202210087231A CN114449374A CN 114449374 A CN114449374 A CN 114449374A CN 202210087231 A CN202210087231 A CN 202210087231A CN 114449374 A CN114449374 A CN 114449374A
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power supply
state information
neighbor
latest
trigger
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CN114449374B (en
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魏文力
缪宁杰
陈铁义
方芹
徐丹露
王澍
田梁玉
吴敏彦
郑卓凡
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Innovation And Entrepreneurship Center Of State Grid Zhejiang Electric Power Co ltd
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Innovation And Entrepreneurship Center Of State Grid Zhejiang Electric Power Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40006—Architecture of a communication node
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2209/00—Arrangements in telecontrol or telemetry systems
    • H04Q2209/30—Arrangements in telecontrol or telemetry systems using a wired architecture
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2209/00—Arrangements in telecontrol or telemetry systems
    • H04Q2209/80—Arrangements in the sub-station, i.e. sensing device
    • H04Q2209/82—Arrangements in the sub-station, i.e. sensing device where the sensing device takes the initiative of sending data

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Abstract

The application discloses a high-density distributed power supply communication method, which comprises the steps of collecting local latest state information at the current control moment, local last trigger moment state information and neighbor power supply latest state information of a neighbor power supply, judging whether the current control moment meets a trigger condition or not by calculating the difference value between the local latest state information and the last trigger moment state information and the unbalance amount between the last trigger moment state information and the neighbor power supply latest state information, and if the current control moment meets the trigger condition, sending the local latest state information to the neighbor power supply. In addition, the application also provides a device and a medium, which correspond to the high-density distributed power supply communication method and have the same effects.

Description

High-density distributed power supply communication method, device and medium
Technical Field
The present disclosure relates to the field of power grid communications, and in particular, to a method, an apparatus, and a medium for high-density distributed power communication.
Background
With the gradual exhaustion of earth resources and the concern of people on environmental problems, the application of renewable energy is more and more emphasized by countries in the world, and the large-scale access of a distributed power supply to a power distribution network becomes a current development trend. However, considering that the output of new energy such as photovoltaic energy, wind power and the like has randomness and volatility, the access of the high-density distributed power supply brings challenges to the safe and stable operation of the power distribution network. How to maintain stable and high-reliability power supply of system voltage frequency, realize flexible and efficient multisource coordination control, and then improve renewable energy consumption ability is the focus of novel distribution network attention of high-density distributed power source access. Droop control strategies have gained wide attention because they allow automatic distribution of load power among micro-sources without the need for dominating distributed power supplies and inter-tie connections. However, since droop control is proportional differential control, steady state deviation of voltage is caused, and the effect of reactive power distribution is not ideal, cooperative control needs to be adopted to assist voltage recovery and reactive power sharing, and distributed control based on a consistency theory is an effective way for achieving system cooperation. In practical engineering implementations, communication between neighboring distributed power sources is typically performed in a discrete form over a sparse network. Conventional distributed communications are triggered on a time basis, i.e., information transmission is performed at regular intervals.
Information transmission is performed at regular intervals, and when the local state quantity at the adjacent communication time does not change greatly, the current state is still transmitted each time.
Therefore, how to solve the problem of communication resource waste caused by time triggering is an urgent technical problem to be solved by those in the art.
Disclosure of Invention
The application aims to provide a high-density distributed power supply communication method, device and medium.
In order to solve the above technical problem, the present application provides a high-density distributed power communication method, including:
acquiring local latest state information of a current power supply at a current control moment, state information of a last trigger moment of the current power supply and latest state information of a neighbor power supply of the neighbor power supply;
determining a difference value between the local latest state information and the last trigger time state information, and determining an unbalance amount between the last trigger time state information and the neighbor power supply latest state information;
judging whether a triggering condition is met or not according to the difference and the unbalance;
And if so, sending the local latest state information to the neighbor power supply, and recording the current control moment as a trigger moment.
Preferably, in the high-density distributed power supply communication method, the local latest state information is a local latest voltage observation value;
correspondingly, the last trigger time state information is a last trigger time voltage observation value, and the latest neighbor power supply state information is a latest neighbor power supply voltage observation value.
Preferably, in the high-density distributed power supply communication method, the determining an amount of unbalance between the last trigger time state information and the latest neighbor power supply state information includes:
determining the sequence number of the last trigger moment according to a first formula;
acquiring the last trigger time voltage observed value corresponding to the serial number;
determining the unbalance amount of the last trigger time voltage observation value and the latest neighbor power supply voltage observation value according to a second formula;
wherein the first formula is:
Figure BDA0003488402010000021
i represents the current power supply, k represents the sequence number of the current control moment, m represents a variable, and m (k) represents the sequence number of the last trigger moment of the current power supply;
Figure BDA0003488402010000022
Representing the trigger time of the current power supply;
the second formula is:
Figure BDA0003488402010000023
j denotes the neighbor power supply, NiRepresenting the number of said neighbour power supplies, a, representing said current power supplyijRepresents a communication weight between the current power source and the neighbor power source, V represents a voltage,
Figure BDA0003488402010000024
represents the last trigger time of the current power supply,
Figure BDA0003488402010000025
the last trigger time voltage observation representing the last trigger time of the current power supply,
Figure BDA0003488402010000026
the neighbor power supply most recent voltage observation, u, representing a last trigger time of the neighbor power supplyVi(k) Representing the last trigger time voltage observation value and the latest voltage observation value of the neighbor power supplyThe unbalance of the measured values.
Preferably, in the high-density distributed power supply communication method, the determining whether a trigger condition is satisfied according to the difference and the unbalance amount includes:
the preset trigger parameters are obtained, and the trigger parameters are obtained,
judging whether a triggering condition is met or not according to a third formula by combining the preset triggering parameter, the difference value and the unbalance amount;
wherein the third formula is: | eVi(k)|≥ε|uVi(k)|，
ε is the preset trigger parameter, eVi(k) The difference between the local most recent voltage observation and the last trigger time voltage observation.
Preferably, in the high-density distributed power supply communication method, the local latest state information is a local latest reactive state quantity;
correspondingly, the last trigger moment state information is the last trigger moment reactive state quantity, and the latest neighbor power supply state information is the latest neighbor power supply reactive state quantity.
Preferably, in the high-density distributed power supply communication method, the determining an amount of unbalance between the last trigger time state information and the latest neighbor power supply state information includes:
determining the sequence number of the last trigger moment according to a fourth formula;
acquiring the reactive state quantity at the last triggering moment corresponding to the serial number;
determining the unbalance amount between the reactive state quantity at the last trigger moment and the latest reactive state quantity of the neighbor power supply according to a fifth formula;
wherein the fourth formula is:
Figure BDA0003488402010000031
i represents the current power supply, k represents the serial number of the current control time, m represents a variable, and m (k) representsA sequence number of the last trigger time of the current power supply;
Figure BDA0003488402010000032
representing the trigger time of the current power supply;
the fifth formula is:
Figure BDA0003488402010000033
j denotes the neighbor power supply, NiNumber of the neighbor power sources, a, representing the current power source ijRepresenting a communication weight between the current power source and the neighbor power source, n representing a reactive power droop coefficient,
Figure BDA0003488402010000034
represents the last trigger time of the current power supply,
Figure BDA0003488402010000035
representing the last trigger moment reactive state quantity of the current power supply,
Figure BDA0003488402010000041
representing the latest reactive state quantity, u, of the neighbor power supplyQi(k) And the unbalance amount representing the reactive state quantity at the last trigger moment and the latest reactive state quantity of the neighbor power supply.
Preferably, in the high-density distributed power supply communication method, the determining whether a trigger condition is satisfied according to the difference and the unbalance amount includes:
the preset trigger parameters are obtained and the trigger parameters are set,
judging whether a triggering condition is met or not according to a sixth formula by combining the preset triggering parameter, the difference value and the unbalance amount;
wherein the sixth formula is: | eQi(k)|≥ε|uQi(k)|，
ε is the preset trigger parameter, eQi(k)The difference between the local latest reactive state quantity and the reactive state quantity at the last triggering moment is obtained.
In order to solve the above technical problem, the present application also provides a high-density distributed power supply communication device, including:
the acquisition module is used for acquiring the local latest state information of the current power supply at the current control moment, the state information of the last trigger moment of the current power supply and the latest state information of the neighbor power supply;
The determining module is used for determining the difference value between the local latest state information and the last triggering time state information and determining the unbalance amount between the last triggering time state information and the neighbor power supply latest state information;
the judging module is used for judging whether the triggering condition is met or not according to the difference and the unbalance; if yes, triggering a sending module;
and the sending module is used for sending the local latest state information to the neighbor power supply and recording the current control moment as a trigger moment.
In order to solve the above technical problem, the present application also provides a high-density distributed power supply communication device, including:
a memory for storing a computer program;
a processor for implementing the steps of the high density distributed power communication method when executing the computer program.
In order to solve the above technical problem, the present application further provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the high-density distributed power communication method.
The high-density distributed power supply communication method includes the steps of collecting local latest state information of a current control moment, local last trigger moment state information and neighbor power supply latest state information of neighbor power supplies, judging whether the current control moment meets a trigger condition or not by calculating a difference value between the local latest state information and the last trigger moment state information and an unbalance amount between the last trigger moment state information and the neighbor power supply latest state information, and if the current control moment meets the trigger condition, sending the local latest state information to the neighbor power supplies.
In addition, the application also provides a device and a medium, which correspond to the high-density distributed power supply communication method and have the same effects.
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In order to more clearly illustrate the embodiments of the present application, the drawings needed for the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained by those skilled in the art without inventive effort.
Fig. 1 is a flowchart of a high-density distributed power communication method according to an embodiment of the present application;
fig. 2 is a schematic view of an implementation scenario of a high-density distributed power communication method according to an embodiment of the present disclosure;
fig. 3 is a structural diagram of a high-density distributed power supply communication device according to an embodiment of the present application;
fig. 4 is a structural diagram of another high-density distributed power communication apparatus according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the present application.
The core of the application is to provide a high-density distributed power supply communication method, device and medium for solving the problem of communication resource waste caused by time triggering.
In order that those skilled in the art will better understand the disclosure, the following detailed description is given with reference to the accompanying drawings.
Fig. 1 is a flowchart of a high-density distributed power supply communication method according to an embodiment of the present disclosure, and as shown in fig. 1, the high-density distributed power supply communication method includes:
s11: acquiring local latest state information of a current power supply at the current control moment, state information of a last trigger moment of the current power supply and latest state information of a neighbor power supply of the neighbor power supply;
s12: determining the difference value between the local latest state information and the state information at the last triggering moment, and determining the unbalance amount between the state information at the last triggering moment and the latest state information of the neighbor power supply;
s13: judging whether the triggering condition is met or not according to the difference and the unbalance;
s14: if yes, sending the local latest state information to the neighbor power supply, and recording the current control time as the trigger time.
It should be noted that, the current control time refers to that the current power supply acquires state information according to a preset time interval, and each time of acquiring the state information is recorded as the control time. The neighbor power supplies mentioned in this embodiment refer to power supplies adjacent to the current power supply, the number of the neighbor power supplies is not limited in this embodiment, and may be one or multiple, the neighbor power supplies mutually transmit state information to realize information transmission between the power supplies, and a power distribution network high-density distributed power supply cooperative control strategy is established based on the received information data.
In this embodiment, whether the communication operation is required is determined by judging whether the local state information at the current control time meets the trigger condition according to the difference and the unbalance amount, and whether the communication operation is required is judged by judging whether the change state of the current power supply at the current control time according to the trigger condition. Therefore, not every control timing is a trigger timing. The embodiment does not specifically limit the trigger condition, and the trigger condition may be designed according to actual situations.
The local latest state information mentioned in this embodiment refers to the state information of the current power supply at the current control time, and this embodiment does not limit what type of data the state information specifically refers to, and may be designed according to actual needs. In addition, the last trigger time status information mentioned in this embodiment means that the status information of the current power supply reaches the trigger condition, and the trigger time closest to the current control time is denoted as a last trigger time, the local status information sent to the neighboring power supply at the last trigger time is the last trigger time status information, and the last trigger time does not necessarily correspond to the last control time. The latest state information of the neighbor power supply mentioned in this embodiment means that after the neighbor power supply reaches the trigger condition, the trigger time closest to the current control time sends the state information of the neighbor power supply to the current power supply as the latest state information of the neighbor power supply.
Fig. 2 is a schematic view of an implementation scenario of the high-density distributed power communication method provided in this embodiment, fig. 2 is only an implementation scenario scheme provided in this embodiment, and the implementation scenario of the high-density distributed power communication method provided in this embodiment is not limited to this scenario. As shown in fig. 2, 5 distributed power sources DG1, DG2, DG3, DG4 and DG5 are included, DG1, DG2 and DG3 are connected to voltage bus V through respective impedances R1, L1, R2, L2, R3 and L3b1DG4 and DG5 are connected to the voltage bus V via respective impedances R4, L5 and R5, L5b2Voltage bus Vb1And voltage bus Vb2The power source is connected with an inductor L through a resistor R, and is connected with an upper power grid W1 through a transformer T1 and a breaker S1, if a power source DG1 is taken as a current power source, a neighbor power source of a power source DG1 is DG2, and if the power source DG2 is taken as the current power source, neighbor power sources of a power source DG2 are DG1 and DG 3.
Specifically, when the current power supply reaches a preset control time, collecting local latest state information, state information of the current power supply at the last trigger time and latest state information of a neighbor power supply of the neighbor power supply, determining a difference value between the local latest state information and the state information of the previous trigger time and an unbalance amount between the state information of the previous trigger time and the latest state information of the neighbor power supply, judging whether a trigger condition is met according to the difference value and the unbalance amount, if the trigger condition is met, sending the local latest state information to the neighbor power supply, recording the current control time as the trigger time, if the trigger condition is not met, not sending the local state information to the neighbor power supply, and at the moment, keeping the state information obtained at the last trigger time by the neighbor power supply.
By the high-density distributed power supply communication method, whether the state information reaches the trigger condition or not is judged, information transmission is carried out only when the trigger condition is met, and the problem of resource waste caused by information transmission when the local state quantity does not change greatly at the adjacent control moment is solved.
According to the foregoing embodiments, this embodiment provides a preferred solution, where the local latest state information is a local latest voltage observed value;
correspondingly, the last trigger time state information is a last trigger time voltage observation value, and the latest neighbor power supply state information is a latest neighbor power supply voltage observation value.
The quality of the voltage is one of the most concerned indexes of the operation of the power distribution network, and the embodiment does not limit the specific mode for obtaining the voltage observation value and is designed according to the actual condition. Correspondingly, the last trigger time state information is the voltage observed value of the current power supply at the last trigger time and is recorded as the last trigger time voltage observed value, and the latest state information of the neighbor power supply is the latest voltage observed value of the neighbor power supply, which is the voltage observed value of the neighbor power supply closest to the current control time, in the voltage observed values sent to the current power supply at the trigger time. The number of the neighbor power supplies is not limited in the embodiment, and the neighbor power supplies can be designed according to actual needs.
Preferably, when the local latest state information is the local latest voltage observation value, determining an amount of unbalance between the state information at the last trigger time and the latest state information of the neighbor power supply includes:
determining the sequence number of the last trigger moment according to a first formula;
acquiring a last trigger moment voltage observed value corresponding to the serial number;
determining the unbalance amount of the last trigger time voltage observed value and the latest neighbor power supply voltage observed value according to a second formula;
wherein the first formula is:
Figure BDA0003488402010000081
i represents the current power supply, k represents the serial number of the current control moment, m represents a variable, and m (k) represents the serial number of the last trigger moment of the current power supply;
Figure BDA0003488402010000082
indicating the trigger moment of the current power supply;
the second formula is:
Figure BDA0003488402010000083
j denotes a neighbor power supply, NiRepresenting the number of neighbour power supplies, a, representing the current power supplyijRepresents the communication weight between the current power supply and the neighboring power supply, V represents the voltage,
Figure BDA0003488402010000084
indicating the last trigger time of the current power supply,
Figure BDA0003488402010000085
a last trigger time voltage observation representing a last trigger time of a current power supply,
Figure BDA0003488402010000086
representing the last voltage observation, u, of the neighbor power supply at the time of its last triggerVi(k) Is shown onAnd the unbalance amount of the voltage observed value at the trigger moment and the latest voltage observed value of the neighbor power supply.
In this embodiment, i represents a current power supply, k represents a serial number of a current control time, k is a positive integer greater than 0, a control time is reached every preset time, a value of k is incremented by one, and when state information of the control time meets a trigger condition, the current control time is recorded as the trigger time. m (k) represents the sequence number of the last trigger time of the current power supply;
Figure BDA0003488402010000087
representing the instant of triggering of the current power supply, the first formula being such that
Figure BDA0003488402010000088
M takes the value of m when the maximum value of k is less than, and m (k) is equal to the maximum value. Obtaining a sequence number m (k) of the last trigger moment nearest to the current control moment k through a first formula, and obtaining the last trigger moment of the current power supply through the sequence number m (k)
Figure BDA0003488402010000089
Determining last trigger time voltage observations
Figure BDA00034884020100000810
Similarly, the latest voltage observation value of the neighbor power supply is
Figure BDA00034884020100000811
And determining the voltage observed value at the last trigger moment according to a second formula
Figure BDA00034884020100000812
Observed value of latest voltage of neighbor power supply
Figure BDA00034884020100000813
Amount of unbalance u ofVi(k)。
In addition, whether the trigger condition is met or not is judged according to the difference value between the local latest voltage observation value and the voltage observation value at the last trigger time and the unbalance amount between the voltage observation value at the last trigger time and the latest voltage observation value of the neighbor power supply, the embodiment provides an optimal scheme, whether the trigger condition is met or not is judged according to the difference value and the unbalance amount, and the method includes the following steps:
The preset trigger parameters are obtained and the trigger parameters are set,
judging whether the triggering condition is met or not according to a third formula by combining preset triggering parameters, the difference values and the unbalance amount;
wherein the third formula is: | eVi(k)|≥ε|uVi(k)|，
Epsilon is a predetermined trigger parameter, eVi(k) And the difference value of the local latest voltage observed value and the voltage observed value at the last trigger moment is obtained.
The preset trigger parameter epsilon mentioned in this embodiment is a parameter preset according to actual design requirements, and this embodiment is not limited to a specific numerical value of the preset trigger parameter epsilon, and may be set according to actual conditions. Specifically, when the preset trigger parameter, the difference value and the unbalance amount satisfy a third formula, the current power supply sends the local latest voltage observation value to the neighbor power supply, the current control record is taken as the trigger time, and if the preset trigger parameter, the difference value and the unbalance amount do not satisfy the third formula, the voltage observation value obtained by the neighbor power supply still keeps the voltage observation value at the previous trigger time.
By the high-density distributed power supply communication method, whether the voltage observed value reaches the trigger condition or not is judged, and the transmission of the voltage observed value information is only carried out when the trigger condition is met, so that the problem of resource waste caused by the fact that information transmission is still carried out when the local voltage observed value does not change greatly at the adjacent control moment is solved.
According to the above embodiments, this embodiment provides a preferable scheme, where the local latest state information is a local latest reactive state quantity;
correspondingly, the state information at the last trigger moment is the reactive state quantity at the last trigger moment, and the latest state information of the neighbor power supply is the latest reactive state quantity of the neighbor power supply.
The reactive state quantity is one of indexes of reasonable reactive compensation capacity of the power distribution network, reasonable reactive compensation capacity configuration and effective voltage reactive control measures can guarantee the voltage quality of the high-voltage power distribution network, improve the safety and stability of power grid operation, reduce the electric energy loss of the power grid, improve the transmission capacity of equipment and fully exert the economic benefits of the operation of the high-voltage power distribution network. The embodiment does not limit the specific way of obtaining the reactive state quantity, and the method is designed according to the actual situation. Correspondingly, the last trigger time state information is the reactive state quantity of the current power supply at the last trigger time and is recorded as the last trigger time reactive state quantity, and the latest state information of the neighbor power supply is the reactive state quantity which is closest to the current control time and is in the reactive state quantities sent to the current power supply by the neighbor power supply at the trigger time and is recorded as the latest reactive state quantity of the neighbor power supply. The number of the neighbor power supplies is not limited in the embodiment, and the neighbor power supplies can be designed according to actual needs.
Preferably, when the local latest status information is the local latest reactive status quantity, determining an amount of unbalance between the status information at the last trigger time and the latest status information of the neighboring power supply includes:
determining the sequence number of the last trigger moment according to a fourth formula;
acquiring the reactive state quantity at the last trigger moment corresponding to the sequence number;
determining the unbalance amount between the reactive state quantity at the last trigger moment and the latest reactive state quantity of the neighbor power supply according to a fifth formula;
wherein the fourth formula is:
Figure BDA0003488402010000101
i represents the current power supply, k represents the serial number of the current control moment, m represents a variable, and m (k) represents the serial number of the last trigger moment of the current power supply;
Figure BDA0003488402010000102
indicating the trigger moment of the current power supply;
the fifth formula is:
Figure BDA0003488402010000103
j denotes a neighbor power supply, NiNumber of neighbor power sources, a, representing the current power sourceijRepresenting the communication weight between the current power supply and the neighbor power supply, n representing the reactive power droop coefficient,
Figure BDA0003488402010000104
indicating the last trigger time of the current power supply,
Figure BDA0003488402010000105
representing the last trigger instant reactive state quantity of the current power supply,
Figure BDA0003488402010000106
representing the latest reactive state quantity, u, of the neighbor power supplyQi(k) And the unbalance amount of the reactive state quantity at the last trigger moment and the latest reactive state quantity of the neighbor power supply is represented.
In this embodiment, i represents a current power supply, k represents a serial number of a current control time, k is a positive integer greater than 0, a control time is reached every preset time, a value of k is incremented by one, and when state information of the control time meets a trigger condition, the current control time is recorded as the trigger time. m (k) represents the sequence number of the last trigger time of the current power supply;
Figure BDA0003488402010000107
representing the instant of triggering of the current power supply, a fourth formula is such that
Figure BDA0003488402010000108
M takes the value of m when the maximum value of k is less than, and m (k) is equal to the maximum value. Obtaining a sequence number m (k) of a last trigger moment nearest to the current control moment k through a fourth formula, and obtaining the last trigger moment of the current power supply through the sequence number m (k)
Figure BDA0003488402010000109
Determining last triggerInstantaneous reactive state quantity
Figure BDA00034884020100001010
Similarly, the latest reactive state quantity of the neighbor power supply is
Figure BDA00034884020100001011
Then determining the reactive state quantity at the last triggering moment according to a fifth formula
Figure BDA00034884020100001012
The latest reactive state quantity of the neighbor power supply
Figure BDA00034884020100001013
Amount of unbalance u ofQi(k)。
In addition, judging whether the triggering condition is met according to the difference between the local latest reactive state quantity and the reactive state quantity at the last triggering moment and the unbalance between the reactive state quantity at the last triggering moment and the latest reactive state quantity of the neighbor power supply, the embodiment provides an optimal scheme, and judging whether the triggering condition is met according to the difference and the unbalance, including:
The preset trigger parameters are obtained, and the trigger parameters are obtained,
judging whether the triggering condition is met or not according to a preset triggering parameter, the difference value and the unbalance combined with a sixth formula;
wherein the sixth formula is: | eQi(k)|≥ε|uQi(k)|，
Epsilon is a predetermined trigger parameter, eQi(k) And the difference value of the local latest reactive state quantity and the reactive state quantity at the last triggering moment is obtained.
The preset trigger parameter epsilon mentioned in this embodiment is a parameter preset according to actual design requirements, and this embodiment is not limited to a specific numerical value of the preset trigger parameter epsilon, and may be set according to actual conditions. Specifically, when the preset trigger parameter, the difference value and the unbalance amount satisfy the third formula, the current power supply sends the local latest reactive state quantity to the neighbor power supply, the current control record is the trigger time, and if the preset trigger parameter, the difference value and the unbalance amount do not satisfy the third formula, the reactive state quantity obtained by the neighbor power supply still keeps the reactive state quantity at the previous trigger time.
By the high-density distributed power supply communication method, whether the reactive state quantity reaches the trigger condition or not is judged, the transmission of the reactive state quantity information is carried out only when the trigger condition is met, and the problem of resource waste caused by information transmission when the local reactive state quantity does not change greatly at the adjacent control moment is solved.
According to the embodiment, the current power supply establishes a new distributed cooperative control input by combining a seventh formula, an eighth formula and a ninth formula based on the latest voltage observed value and the latest reactive state quantity of the currently obtained neighbor power supply:
wherein the seventh formula is: vi(k)＝Vn-niQi(k)+ui(k)；
The eighth formula is:
Figure 1
the ninth formula is:
Figure 2
wherein, TiIndicating a preset time interval, V, of the current power supply iiRepresenting the output voltage, k, of the distributed power supply i1Representing the integral coefficient, k, of the reactive equipartition controller2Representing the integral coefficient, k, of the voltage recovery controller3Representing the voltage observer integration coefficient.
In the above embodiments, the high-density distributed power communication method is described in detail, and the present application also provides embodiments corresponding to the high-density distributed power communication apparatus. It should be noted that the present application describes the embodiments of the apparatus portion from two perspectives, one from the perspective of the function module and the other from the perspective of the hardware.
Fig. 3 is a structural diagram of a high-density distributed power supply communication apparatus according to an embodiment of the present application, and as shown in fig. 3, the high-density distributed power supply communication apparatus includes:
the acquisition module 31 is configured to acquire local latest state information of the current power supply at the current control time, state information of a last trigger time of the current power supply, and latest state information of a neighbor power supply of the neighbor power supply;
The determining module 32 is configured to determine a difference between the local latest status information and the status information at the previous trigger time, and determine an amount of imbalance between the status information at the previous trigger time and the latest status information of the neighboring power source;
the judging module 33 is configured to judge whether the trigger condition is met according to the difference and the unbalance; if yes, triggering the sending module 34;
and the sending module 34 is configured to send the local latest state information to the neighboring power supply, and record the current control time as the trigger time.
Specifically, when the current power supply reaches the preset control time, the collecting module 31 collects the local latest state information of the current power supply at the current control time, the last trigger time state information of the current power supply, and the latest state information of the neighboring power supply; the determining module 32 determines the difference between the local latest status information and the status information at the previous triggering time, and determines the unbalance between the status information at the previous triggering time and the latest status information of the neighboring power supplies; the judging module 33 judges whether the triggering condition is met according to the difference and the unbalance; if yes, the trigger sending module 34 sends the local latest state information to the neighboring power supply, and records the current control time as the trigger time. And if the trigger condition is not met, not sending local state information to the neighbor power supply, and keeping the state information acquired at the last trigger moment by the neighbor power supply.
Through the high-density distributed power supply communication device provided by the application, whether the state information reaches the trigger condition or not is judged, information transmission is only carried out when the trigger condition is met, and the problem of resource waste caused by information transmission still when the local state quantity at the adjacent control moment is not changed greatly is solved.
Since the embodiments of the apparatus portion and the method portion correspond to each other, please refer to the description of the embodiments of the method portion for the embodiments of the apparatus portion, which is not repeated here.
Fig. 4 is a structural diagram of another high-density distributed power supply communication apparatus according to an embodiment of the present application, and as shown in fig. 4, the high-density distributed power supply communication apparatus includes: a memory 40 for storing a computer program;
and a processor 41, configured to implement the steps of the high-density distributed power communication method according to the above-mentioned embodiment when executing the computer program.
The high-density distributed power communication apparatus provided by the embodiment may include, but is not limited to, a smart phone, a tablet computer, a notebook computer, or a desktop computer.
Processor 41 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and so forth. The Processor 41 may be implemented in hardware using at least one of a Digital Signal Processor (DSP), a Field-Programmable Gate Array (FPGA), and a Programmable Logic Array (PLA). The processor 41 may also include a main processor and a coprocessor, where the main processor is a processor for Processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 41 may be integrated with a Graphics Processing Unit (GPU) which is responsible for rendering and drawing the content required to be displayed on the display screen. In some embodiments, processor 41 may also include an Artificial Intelligence (AI) processor for processing computational operations related to machine learning.
Memory 40 may include one or more computer-readable storage media, which may be non-transitory. Memory 40 may also include high speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In this embodiment, the memory 40 is at least used for storing the computer program 401, wherein after being loaded and executed by the processor 41, the computer program can implement the relevant steps of the high-density distributed power communication method disclosed in any one of the foregoing embodiments. In addition, the resources stored in the memory 40 may also include an operating system 402, data 403, and the like, and the storage manner may be a transient storage or a permanent storage. Operating system 402 may include Windows, Unix, Linux, and the like, among others. The data 403 may include, but is not limited to, data involved in implementing a high density distributed power communications method, and the like.
In some embodiments, the high-density distributed power communication apparatus may further include a display 42, an input/output interface 43, a communication interface 44, a power supply 45, and a communication bus 46.
Those skilled in the art will appreciate that the configuration shown in fig. 4 does not constitute a limitation of a high density distributed power communications apparatus and may include more or fewer components than those shown.
The high-density distributed power supply communication device provided by the embodiment of the application comprises a memory and a processor, wherein when the processor executes a program stored in the memory, the processor can realize the following method: the high-density distributed power supply communication method judges whether the state information reaches the trigger condition or not, and only transmits the information when the trigger condition is met, so that the problem of resource waste caused by still transmitting the information when the local state quantity at the adjacent control moment is not changed greatly is solved.
Finally, the application also provides a corresponding embodiment of the computer readable storage medium. The computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps as described in the above-mentioned high density distributed power supply communication method embodiments.
It is to be understood that if the method in the above embodiments is implemented in the form of software functional units and sold or used as a stand-alone product, it can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium and executes all or part of the steps of the methods described in the embodiments of the present application, or all or part of the technical solutions. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The present embodiment provides a computer-readable storage medium having stored thereon a computer program that, when executed by a processor, implements a method of: the high-density distributed power supply communication method judges whether the state information reaches the trigger condition or not, and only transmits the information when the trigger condition is met, so that the problem of resource waste caused by still transmitting the information when the local state quantity at the adjacent control moment is not changed greatly is solved.
The high density distributed power communications methods, apparatus, and media provided herein have been described in detail above. The embodiments are described in a progressive mode in the specification, the emphasis of each embodiment is on the difference from the other embodiments, and the same and similar parts among the embodiments can be referred to each other. The device disclosed in the embodiment corresponds to the method disclosed in the embodiment, so that the description is simple, and the relevant points can be referred to the description of the method part. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
It should also be noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.

Claims (10)

1. A method for high density distributed power communications, comprising:
acquiring local latest state information of a current power supply at a current control moment, state information of a last trigger moment of the current power supply and latest state information of a neighbor power supply of the neighbor power supply;
Determining a difference value between the local latest state information and the last trigger time state information, and determining an unbalance amount between the last trigger time state information and the neighbor power supply latest state information;
judging whether a trigger condition is met or not according to the difference value and the unbalance amount;
and if so, sending the local latest state information to the neighbor power supply, and recording the current control time as a trigger time.
2. The high-density distributed power supply communication method according to claim 1, wherein the local latest state information is a local latest voltage observation value;
correspondingly, the last trigger time state information is a last trigger time voltage observation value, and the latest neighbor power supply state information is a latest neighbor power supply voltage observation value.
3. The method according to claim 2, wherein the determining the amount of imbalance between the last trigger time status information and the latest neighbor power status information comprises:
determining the sequence number of the last trigger moment according to a first formula;
acquiring the last trigger time voltage observed value corresponding to the serial number;
Determining the unbalance amount between the last trigger moment voltage observation value and the latest neighbor power supply voltage observation value according to a second formula;
wherein the first formula is:
Figure FDA0003488400000000011
i represents the current power supply, k represents the sequence number of the current control moment, m represents a variable, and m (k) represents the sequence number of the last trigger moment of the current power supply;
Figure FDA0003488400000000012
representing the trigger time of the current power supply;
the second formula is:
Figure FDA0003488400000000013
j denotes the neighbor power supply, NiRepresenting the number of said neighbour power supplies, a, representing said current power supplyijRepresents a communication weight between the current power source and the neighbor power source, V represents a voltage,
Figure FDA0003488400000000014
represents the last trigger time of the current power supply,
Figure FDA0003488400000000015
the last trigger time voltage observation representing the last trigger time of the current power supply,
Figure FDA0003488400000000016
the neighbor representing a last trigger time of the neighbor power supplyObserved value of the latest voltage of the power supply, uVi(k) The amount of imbalance representing the last trigger time voltage observation and the neighbor power supply most recent voltage observation.
4. The high-density distributed power communication method according to claim 3, wherein the determining whether a trigger condition is satisfied according to the difference and the unbalance amount comprises:
The preset trigger parameters are obtained and the trigger parameters are set,
judging whether a trigger condition is met or not according to a third formula combining the preset trigger parameter, the difference value and the unbalance amount;
wherein the third formula is: | eVi(k)|≥ε|uVi(k)|，
ε is the preset trigger parameter, eVi(k) The difference between the local most recent voltage observation and the last trigger time voltage observation.
5. The high-density distributed power communication method according to claim 1, wherein the local latest state information is a local latest reactive state quantity;
correspondingly, the last trigger time state information is the last trigger time reactive state quantity, and the latest neighbor power state information is the latest neighbor power reactive state quantity.
6. The method according to claim 5, wherein the determining the amount of imbalance between the last trigger time status information and the latest neighbor power status information comprises:
determining the sequence number of the last trigger moment according to a fourth formula;
acquiring the reactive state quantity at the last triggering moment corresponding to the serial number;
determining the unbalance amount between the reactive state quantity at the last trigger moment and the latest reactive state quantity of the neighbor power supply according to a fifth formula;
Wherein the fourth formula is:
Figure FDA0003488400000000021
i represents the current power supply, k represents the serial number of the current control moment, m represents a variable, and m (k) represents the serial number of the last trigger moment of the current power supply;
Figure FDA0003488400000000022
representing the trigger time of the current power supply;
the fifth formula is:
Figure FDA0003488400000000023
j denotes the neighbor power supply, NiNumber of the neighbor power sources representing the current power source, aijRepresenting a communication weight between the current power source and the neighbor power source, n representing a reactive power droop coefficient,
Figure FDA0003488400000000031
represents the last trigger time of the current power supply,
Figure FDA0003488400000000032
representing the last trigger time reactive state quantity of the current power supply,
Figure FDA0003488400000000033
representing the latest reactive state quantity, u, of the neighbor power supplyQi(k) And the unbalance amount representing the reactive state quantity at the last trigger moment and the latest reactive state quantity of the neighbor power supply.
7. The method according to claim 6, wherein the determining whether a trigger condition is satisfied according to the difference and the unbalance amount comprises:
the preset trigger parameters are obtained, and the trigger parameters are obtained,
judging whether a triggering condition is met or not according to a sixth formula by combining the preset triggering parameter, the difference value and the unbalance amount;
Wherein the sixth formula is: | eQi(k)|≥ε|uQi(k)|，
ε is the preset trigger parameter, eQi(k) The difference between the local latest reactive state quantity and the reactive state quantity at the last triggering moment is obtained.
8. A high-density distributed power communication apparatus, comprising:
the acquisition module is used for acquiring the local latest state information of the current power supply at the current control moment, the state information of the last trigger moment of the current power supply and the latest state information of the neighbor power supply;
the determining module is used for determining the difference value between the local latest state information and the last triggering time state information and determining the unbalance amount between the last triggering time state information and the neighbor power supply latest state information;
the judging module is used for judging whether the triggering condition is met or not according to the difference and the unbalance; if yes, triggering a sending module;
and the sending module is used for sending the local latest state information to the neighbor power supply and recording the current control moment as a trigger moment.
9. A high-density distributed power communication apparatus, comprising:
a memory for storing a computer program;
A processor for implementing the steps of the high density distributed power communication method of any one of claims 1 to 7 when executing said computer program.
10. A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the high-density distributed power communication method according to any one of claims 1 to 7.
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