CN-122026360-A - Adjustable resource control method capable of achieving power fluctuation suppression and three-phase dynamic balance

CN122026360ACN 122026360 ACN122026360 ACN 122026360ACN-122026360-A

Abstract

The invention relates to an adjustable resource control method taking power fluctuation suppression and three-phase dynamic balance into consideration, which comprises the steps of collecting total load power of a user, load/power of an adjustable resource and three-phase power, calculating fluctuation residual errors, splitting the fluctuation residual errors to obtain fusion components, determining sources of each fusion component, calculating fluctuation stabilizing control adjustment quantity of the sources of each fusion component according to a three-phase average distribution principle to obtain fluctuation stabilizing control adjustment quantity of the adjustable resource, generating three-phase balance adjustment quantity based on the fluctuation stabilizing control adjustment quantity of an electric automobile V2G unit and the three-phase power, calculating total control adjustment quantity of the electric automobile V2G unit based on the fluctuation stabilizing control adjustment quantity of the electric automobile V2G unit and the three-phase balance adjustment quantity, and controlling the adjustable resource by adopting the fluctuation stabilizing control adjustment quantity and the total control adjustment quantity respectively. The invention can simultaneously give consideration to power fluctuation suppression and three-phase dynamic balance in the power distribution area.

Inventors

KONG LINGDA
YAO ZHIGUO
ZHOU KEHUI
LV QI
WANG PENG
QIN SIJUN
ZHANG ZHIMING
TANG HAIGUO
ZHANG MINGYU
PAN LIQIANG
ZHU JIRAN
ZHOU QIANFAN

Assignees

国网上海能源互联网研究院有限公司
国网湖南省电力有限公司电力科学研究院
国网湖南省电力有限公司
国家电网有限公司

Dates

Publication Date: 20260512
Application Date: 20260209

Claims (17)

1. An adjustable resource control method taking power fluctuation suppression and three-phase dynamic balance into consideration is characterized by comprising the following steps: Collecting user total load power, actual photovoltaic output, electric vehicle load, total charge and discharge power of an energy storage system and three-phase power on a distribution transformer substation bus; Calculating fluctuation residual errors according to the total load power of the user, the actual photovoltaic output, the electric vehicle load and the total charge and discharge power of the energy storage system, splitting the fluctuation residual errors to obtain fusion components, and determining the source of each fusion component; Calculating fluctuation stabilizing control adjustment quantity of the source of each fusion component according to a principle of three-phase average distribution to obtain fluctuation stabilizing control adjustment quantity of a V2G unit of the electric automobile, fluctuation stabilizing control adjustment quantity of a photovoltaic inverter and fluctuation stabilizing control adjustment quantity of an energy storage unit; Generating a three-phase balance adjustment amount based on the electric vehicle V2G unit surge stabilization control adjustment amount and the three-phase power; calculating the total control adjustment amount of the V2G unit of the electric automobile based on the fluctuation stabilizing control adjustment amount of the V2G unit of the electric automobile and the three-phase balance adjustment amount; And the total control adjustment quantity, the fluctuation stabilizing control adjustment quantity and the fluctuation stabilizing control adjustment quantity of the photovoltaic inverter and the energy storage unit of the electric automobile V2G unit are adopted to respectively control the electric automobile V2G unit, the photovoltaic inverter and the energy storage unit.
2. The method for controlling an adjustable resource which takes into account both power fluctuation suppression and three-phase dynamic balance according to claim 1, wherein the calculating fluctuation residual according to the total load power of the user, the actual output of the photovoltaic, the load of the electric automobile and the total charge and discharge power of the energy storage system, and splitting the fluctuation residual to obtain fusion components, and determining the source of each fusion component specifically comprises: Calculating the net load of a distribution area according to the total load power of the user, the actual photovoltaic output, the electric vehicle load and the total charge and discharge power of an energy storage system, and subtracting the target net power from the net load to obtain a fluctuation residual error; performing signal decomposition on the fluctuation residual error by adopting ICEEMDAN algorithm to obtain a group of first modal components; performing signal decomposition on the fluctuation residual error by adopting a VMD decomposition algorithm to obtain a group of second modal components; fusing the first modal component and the second modal component through an attention fusion gating mechanism to obtain a group of fused modal components; And calculating the similarity index of the actual output of each fusion modal component with the photovoltaic, the electric vehicle load and the total charge and discharge power of the energy storage system, and determining the source of each fusion modal component according to the similarity index.
3. The method for controlling an adjustable resource which combines power fluctuation suppression and three-phase dynamic balance according to claim 2, wherein the similarity index is calculated by the following method: , wherein, To fuse modal components And adjustable resources Is used for the similarity index of (a), , The representation of a photovoltaic cell is made, An electric vehicle is shown as a vehicle body, Representing an energy storage system, To fuse modal components And adjustable resources The pearson correlation coefficient between them, To fuse modal components And adjustable resources The dynamic time warping distance between them, Is a normalized constant of the pearson correlation coefficient, Is a normalized constant of the dynamic time warping distance, Is a weight coefficient.
4. The method for controlling an adjustable resource taking power fluctuation suppression and three-phase dynamic balance into consideration according to claim 1, wherein the method is characterized in that a three-phase average distribution principle is adopted, and fluctuation stabilizing control adjustment amounts of sources of the three-phase average distribution principle are calculated for each fusion component to obtain the fluctuation stabilizing control adjustment amounts of the V2G unit, the fluctuation stabilizing control adjustment amounts of the photovoltaic inverter and the fluctuation stabilizing control adjustment amounts of the energy storage unit of the electric automobile, and specifically comprises the following steps: calculating the total power required to be regulated for each fusion component, and equally distributing the total power to three phases to obtain the regulated power required to be born by each phase; And calculating the fluctuation stabilizing control regulating quantity of the V2G unit, the fluctuation stabilizing control regulating quantity of the photovoltaic inverter and the fluctuation stabilizing control regulating quantity of the energy storage unit of the electric automobile according to the regulating power required to be born by each phase and the adjustable capacity of the adjustable resource.
5. The method for controlling an adjustable resource, which combines power fluctuation suppression and three-phase dynamic balance according to claim 4, wherein the calculating the fluctuation stabilizing control adjustment amount of the V2G unit, the fluctuation stabilizing control adjustment amount of the photovoltaic inverter and the fluctuation stabilizing control adjustment amount of the energy storage unit of the electric vehicle according to the adjustment power to be borne by each phase and the adjustable capacity of the adjustable resource specifically comprises: When the tunable resource is photovoltaic, if Phase needs to bear regulation power greater than zero, and photovoltaic inverter pair The stabilizing control adjustment quantity of the phase is as follows: If (1) Phase needs to bear regulated power less than zero, photovoltaic inverter pair The stabilizing control adjustment quantity of the phase is as follows: Wherein, the method comprises the steps of, Is a photovoltaic inverter pair The stabilization of the phase controls the adjustment amount, Is that The regulated power that is needed to be borne by the phase, For the adjustable capacity of the photovoltaic inverter, Is that A set of all phase-tunable photovoltaic inverters; When the adjustable resource is an electric car, if The required adjustment power is larger than zero, and the V2G unit pair of the electric automobile The stabilizing control adjustment quantity of the phase is as follows: If (1) The required adjustment power is smaller than zero, and the V2G unit pair of the electric automobile The stabilizing control adjustment quantity of the phase is as follows: Wherein, the method comprises the steps of, Is an electric automobile V2G unit pair The stabilization of the phase controls the adjustment amount, Is the adjustable capacity of the V2G unit of the electric automobile, Is that A set of all adjustable electric vehicle V2G units; When the adjustable resource is an energy storage system, if The required adjustment power is greater than zero, and the energy storage unit pair The stabilizing control adjustment quantity of the phase is as follows: If (1) The required adjustment power is smaller than zero, and the energy storage unit pair The stabilizing control adjustment quantity of the phase is as follows: Wherein, the method comprises the steps of, As a pair of energy storage units The stabilization of the phase controls the adjustment amount, For the adjustable capacity of the energy storage unit, Is that And a set of all adjustable energy storage units.
6. The method for controlling an adjustable resource that combines power fluctuation suppression and three-phase dynamic balance according to claim 1, wherein the generating a three-phase balance adjustment amount based on the electric vehicle V2G unit fluctuation stabilization control adjustment amount and the three-phase power specifically includes: calculating the deviation of each phase of power and the three-phase average power according to the three-phase power, and identifying heavy load phases and light load phases according to the deviation; determining power to be transferred by taking the smaller absolute value of deviation between the heavy load phase and the light load phase as a reference; Calculating residual adjustable capacity of the electric vehicle V2G unit in the heavy load phase and the electric vehicle V2G unit in the light load phase according to the fluctuation stabilizing control adjustment quantity of the electric vehicle V2G unit; And obtaining the three-phase balance adjustment quantity according to the residual adjustable capacity.
7. The method for controlling an adjustable resource for balancing power fluctuation suppression and three-phase dynamic balance according to claim 6, wherein the three-phase balance adjustment amount is obtained according to the remaining adjustable capacity, specifically: for the heavy load phase, the adjustment amount of the electric automobile V2G unit is as follows: ; for the light load phase, the adjustment amount of the V2G unit of the electric automobile is as follows: ; For the third phase, the adjustment amount of the V2G unit of the electric automobile is zero; Wherein, the Is the regulating variable of the V2G unit of the electric automobile, In order for the power to be transferred, The remaining capacity available for discharge for the electric vehicle V2G unit, The remaining capacity available for charging for the electric vehicle V2G unit, For the collection of all the adjustable electric automobile V2G units on the heavy load phase, Is a set of all adjustable electric automobile V2G units on the light load phase.
8. The method for controlling an adjustable resource that combines power fluctuation suppression and three-phase dynamic balance according to claim 1, wherein the calculating the total control adjustment of the V2G unit of the electric vehicle based on the electric V2G unit fluctuation stabilization control adjustment and the three-phase dynamic balance adjustment specifically comprises: extracting fusion components to be stabilized of the electric automobile, calculating standard deviation, and carrying out linear normalization on the obtained standard deviation to obtain normalized standard deviation ; Calculating the deviation of each phase power and the three-phase average power according to the three-phase power, calculating the unbalanced degree of the deviation, and carrying out linear normalization on the obtained unbalanced degree to obtain normalized unbalanced degree ; By using Calculating the weight of the adjustment quantity, wherein, In order to adjust the weight of the quantity, Adjusting weight discount coefficients for balancing; And carrying out weighted summation on the fluctuation stabilizing control regulating quantity of the V2G unit of the electric automobile and the three-phase balance regulating quantity by adopting the regulating quantity weight to obtain the total control regulating quantity of the V2G unit of the electric automobile.
9. An adjustable resource control device which combines power fluctuation suppression and three-phase dynamic balance, comprising: the acquisition module is used for acquiring the total load power of a user, the actual output of a photovoltaic, the load of an electric automobile, the total charge and discharge power of an energy storage system and the three-phase power on a distribution transformer substation bus; The fusion component calculation and determination module is used for calculating fluctuation residual errors according to the total load power of the user, the actual photovoltaic output, the electric vehicle load and the total charge-discharge power of the energy storage system, splitting the fluctuation residual errors to obtain fusion components, and determining the source of each fusion component; The fluctuation stabilizing control regulating quantity calculating module is used for calculating fluctuation stabilizing control regulating quantity of a source of each fusion component by adopting a principle of three-phase average distribution to obtain the fluctuation stabilizing control regulating quantity of the V2G unit of the electric automobile, the fluctuation stabilizing control regulating quantity of the photovoltaic inverter and the fluctuation stabilizing control regulating quantity of the energy storage unit; The three-phase balance adjustment quantity generation module is used for generating a three-phase balance adjustment quantity based on the electric automobile V2G unit fluctuation stabilizing control adjustment quantity and the three-phase power; the electric automobile V2G unit total control adjustment amount calculation module is used for calculating the electric automobile V2G unit total control adjustment amount based on the electric automobile V2G unit fluctuation stabilizing control adjustment amount and the three-phase balance adjustment amount; The control module is used for controlling the electric automobile V2G unit, the photovoltaic inverter and the energy storage unit respectively by adopting the total control adjustment quantity of the electric automobile V2G unit, the fluctuation stabilizing control adjustment quantity of the photovoltaic inverter and the fluctuation stabilizing control adjustment quantity of the energy storage unit.
10. The apparatus for controlling an adjustable resource that combines power fluctuation suppression and three-phase dynamic balance according to claim 9, wherein the fusion component calculation determination module comprises: The fluctuation residual calculation unit is used for calculating the net load of the distribution transformer area according to the total load power of the user, the actual photovoltaic output, the electric vehicle load and the total charge-discharge power of the energy storage system, and subtracting the target net power from the net load to obtain a fluctuation residual; the first decomposition unit is used for carrying out signal decomposition on the fluctuation residual error by adopting ICEEMDAN algorithm to obtain a group of first modal components; the second decomposition unit is used for carrying out signal decomposition on the fluctuation residual error by adopting a VMD decomposition algorithm to obtain a group of second modal components; The fusion unit is used for fusing the first modal component and the second modal component through an attention fusion gating mechanism to obtain a group of fusion modal components; The source determining unit is used for calculating the similarity index of the actual output of the photovoltaic power, the electric vehicle load and the total charge and discharge power of the energy storage system for each fusion modal component, and determining the source of each fusion modal component according to the similarity index.
11. The apparatus for controlling an adjustable resource that combines power fluctuation suppression and three-phase dynamic balance according to claim 10, wherein the source determining unit employs Calculating a similarity index, wherein, To fuse modal components And adjustable resources Is used for the similarity index of (a), , The representation of a photovoltaic cell is made, An electric vehicle is shown as a vehicle body, Representing an energy storage system, To fuse modal components And adjustable resources The pearson correlation coefficient between them, To fuse modal components And adjustable resources The dynamic time warping distance between them, Is a normalized constant of the pearson correlation coefficient, Is a normalized constant of the dynamic time warping distance, Is a weight coefficient.
12. The apparatus for controlling an adjustable resource that combines power fluctuation suppression and three-phase dynamic balance according to claim 9, wherein the fluctuation stabilizing control adjustment amount calculation module includes: The single-phase adjusting power calculation unit is used for calculating the total power required to be adjusted for each fusion component, and evenly distributing the total power to three phases to obtain the adjusting power required to be born by each phase; And the stabilizing control regulating quantity calculating unit is used for calculating the fluctuation stabilizing control regulating quantity of the V2G unit of the electric automobile, the fluctuation stabilizing control regulating quantity of the photovoltaic inverter and the fluctuation stabilizing control regulating quantity of the energy storage unit according to the regulating power required to be born by each phase and the adjustable capacity of the adjustable resource.
13. The adjustable resource control device that combines power fluctuation suppression and three-phase dynamic balance according to claim 12, wherein the stabilization control adjustment amount calculation unit includes: a first computing subunit for, when the tunable resource is photovoltaic, if Phase needs to bear regulation power greater than zero, and photovoltaic inverter pair The stabilizing control adjustment quantity of the phase is as follows: If (1) Phase needs to bear regulated power less than zero, photovoltaic inverter pair The stabilizing control adjustment quantity of the phase is as follows: Wherein, the method comprises the steps of, Is a photovoltaic inverter pair The stabilization of the phase controls the adjustment amount, Is that The regulated power that is needed to be borne by the phase, For the adjustable capacity of the photovoltaic inverter, Is that A set of all phase-tunable photovoltaic inverters; A second computing subunit for, if the adjustable resource is an electric vehicle The required adjustment power is larger than zero, and the V2G unit pair of the electric automobile The stabilizing control adjustment quantity of the phase is as follows: If (1) The required adjustment power is smaller than zero, and the V2G unit pair of the electric automobile The stabilizing control adjustment quantity of the phase is as follows: Wherein, the method comprises the steps of, Is an electric automobile V2G unit pair The stabilization of the phase controls the adjustment amount, Is the adjustable capacity of the V2G unit of the electric automobile, Is that A set of all adjustable electric vehicle V2G units; A third calculation subunit, configured to, when the adjustable resource is an energy storage system, if The required adjustment power is greater than zero, and the energy storage unit pair The stabilizing control adjustment quantity of the phase is as follows: If (1) The required adjustment power is smaller than zero, and the energy storage unit pair The stabilizing control adjustment quantity of the phase is as follows: Wherein, the method comprises the steps of, As a pair of energy storage units The stabilization of the phase controls the adjustment amount, For the adjustable capacity of the energy storage unit, Is that And a set of all adjustable energy storage units.
14. The apparatus for controlling an adjustable resource that combines power fluctuation suppression and three-phase dynamic balance according to claim 9, wherein the three-phase balance adjustment amount generation module includes: the identification unit is used for calculating the deviation between each phase of power and the three-phase average power according to the three-phase power and identifying heavy load phases and light load phases according to the deviation; the power to be transferred determining unit is used for determining the power to be transferred by taking the absolute value of the deviation between the heavy load phase and the light load phase as a reference; The residual adjustable capacity calculation unit is used for calculating residual adjustable capacity of the electric vehicle V2G unit in the heavy load phase and the electric vehicle V2G unit in the light load phase according to the fluctuation stabilizing control adjustment quantity of the electric vehicle V2G unit; And the three-phase balance adjustment amount calculation unit is used for obtaining the three-phase balance adjustment amount according to the residual adjustable capacity.
15. The apparatus according to claim 14, wherein the three-phase balance adjustment amount calculation unit includes: a heavy load phase calculation unit for adopting, for the heavy load phase Calculating the adjustment quantity of the V2G unit of the electric automobile; A light load phase calculation unit, configured to use, for the light load phase, a light load phase calculation unit that uses Calculating the adjustment quantity of the V2G unit of the electric automobile; A third phase calculation unit, configured to set, for a third phase, an adjustment amount of the electric vehicle V2G unit to zero; Wherein, the Is the regulating variable of the V2G unit of the electric automobile, In order for the power to be transferred, The remaining capacity available for discharge for the electric vehicle V2G unit, The remaining capacity available for charging for the electric vehicle V2G unit, For the collection of all the adjustable electric automobile V2G units on the heavy load phase, Is a set of all adjustable electric automobile V2G units on the light load phase.
16. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor, when executing the computer program, realizes the steps of the adjustable resource control method according to any one of claims 1-8, which combines power ripple suppression with three-phase dynamic balancing.
17. A computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor realizes the steps of the adjustable resource control method of any one of claims 1-8, wherein power ripple suppression and three-phase dynamic balancing are compatible.

Description

Adjustable resource control method capable of achieving power fluctuation suppression and three-phase dynamic balance Technical Field The invention relates to the technical field of intelligent power distribution networks, in particular to an adjustable resource control method taking power fluctuation suppression and three-phase dynamic balance into consideration. Background The problem of three-phase imbalance in distribution areas has traditionally resulted from the random distribution of user single-phase loads and the asymmetric operation of three-phase motors and the like. With distributed energy access, the area payload volatility is exacerbated. Particularly, large-scale electric automobiles are popular as large-scale single-phase loads, disordered charging behaviors are easy to overlap in time and space, serious three-phase unbalance is caused, and problems of exceeding neutral line current, reducing transformer output, increasing line loss, deteriorating voltage quality and the like are caused. The maturation of Vehicle-to-Grid (V2G) technology provides a new idea for solving the above problems. However, the existing regulation and control strategies based on the V2G have limitations, the regulation and control targets are single, only peak clipping and valley filling are concerned, and the power optimization and the three-phase balance cannot be integrated and cooperatively optimized. Therefore, a new method is needed that can accurately analyze the power demand and fully utilize the V2G capability to perform phase power complementation, so as to realize stable operation and three-phase balance endogenous cooperation of the power distribution area. Disclosure of Invention The invention aims to solve the technical problem of providing an adjustable resource control method which can simultaneously give consideration to power fluctuation suppression and three-phase dynamic balance to the power distribution area. The technical scheme adopted by the invention for solving the technical problems is to provide an adjustable resource control method which takes power fluctuation suppression and three-phase dynamic balance into consideration, and the method comprises the following steps: Collecting user total load power, actual photovoltaic output, electric vehicle load, total charge and discharge power of an energy storage system and three-phase power on a distribution transformer substation bus; Calculating fluctuation residual errors according to the total load power of the user, the actual photovoltaic output, the electric vehicle load and the total charge and discharge power of the energy storage system, splitting the fluctuation residual errors to obtain fusion components, and determining the source of each fusion component; Calculating fluctuation stabilizing control adjustment quantity of the source of each fusion component according to a principle of three-phase average distribution to obtain fluctuation stabilizing control adjustment quantity of a V2G unit of the electric automobile, fluctuation stabilizing control adjustment quantity of a photovoltaic inverter and fluctuation stabilizing control adjustment quantity of an energy storage unit; Generating a three-phase balance adjustment amount based on the electric vehicle V2G unit surge stabilization control adjustment amount and the three-phase power; calculating the total control adjustment amount of the V2G unit of the electric automobile based on the fluctuation stabilizing control adjustment amount of the V2G unit of the electric automobile and the three-phase balance adjustment amount; And the total control adjustment quantity, the fluctuation stabilizing control adjustment quantity and the fluctuation stabilizing control adjustment quantity of the photovoltaic inverter and the energy storage unit of the electric automobile V2G unit are adopted to respectively control the electric automobile V2G unit, the photovoltaic inverter and the energy storage unit. Calculating fluctuation residual errors according to the total load power of the user, the actual photovoltaic output, the electric vehicle load and the total charge and discharge power of the energy storage system, splitting the fluctuation residual errors to obtain fusion components, and determining the source of each fusion component, wherein the method specifically comprises the following steps: Calculating the net load of a distribution area according to the total load power of the user, the actual photovoltaic output, the electric vehicle load and the total charge and discharge power of an energy storage system, and subtracting the target net power from the net load to obtain a fluctuation residual error; performing signal decomposition on the fluctuation residual error by adopting ICEEMDAN algorithm to obtain a group of first modal components; performing signal decomposition on the fluctuation residual error by adopting a VMD decomposition algorithm to obtain a group of second modal c