CN-121983953-A - Control method, controller and computer readable storage medium of distributed intelligent power grid

CN121983953ACN 121983953 ACN121983953 ACN 121983953ACN-121983953-A

Abstract

The invention belongs to the technical field of power system dispatching, and particularly relates to a control method, a controller and a computer readable storage medium of a distributed intelligent power grid. The method comprises the steps of judging whether power of a distributed intelligent power grid is lost or not in a future period, comparing unit discharging cost of an energy storage system with unit purchasing cost of the power grid at a certain time point when the power loss of the distributed intelligent power grid at the certain time point is judged, setting the planned charging and discharging power of the energy storage system at the time point to be equal to the sum of the planned charging and discharging power at the last time point and the planned missing power of the distributed intelligent power grid if the unit discharging cost of the energy storage system is lower than the unit purchasing cost of the power grid at the time point and the sum of the charging and discharging power at the last time point of the distributed intelligent power grid at the time point is lower than the maximum charging power of the energy storage system, and otherwise setting the electric power under the electric power grid to be equal to the power loss of the distributed intelligent power grid at the time point.

Inventors

NI CHUANKUN
ZHEN LIJING
ZHANG PENG
WANG XIA
HE HUANGYONG
YU YANG
WU BINGXIN
FU MEIPING
XU JUN
LI YAHUI
LIU ZHIWEN
MAO JIANRONG
SUN RUI
YANG TIANYE
YANG ZHENYU

Assignees

许昌许继软件技术有限公司

Dates

Publication Date: 20260505
Application Date: 20251219

Claims (10)

1. A control method of a distributed smart grid, comprising: when the reverse power of the distributed intelligent power grid is smaller than or equal to a set reverse power threshold, controlling the distributed intelligent power grid according to a preset distributed intelligent power grid work plan; The method for formulating the distributed intelligent power grid work plan comprises the steps of judging whether power of a distributed intelligent power grid is lost or not in a future period of time, comparing unit discharge cost of an energy storage system with unit purchase cost of the power grid at a certain time point when judging that the power of the distributed intelligent power grid is lost at the time point, setting the charging and discharging planned power of the energy storage system at the time point to be equal to the sum of the charging and discharging planned power at the last time point and the distributed intelligent power grid lost if the unit discharge cost of the energy storage system is lower than the unit purchase cost of the power grid at the time point and the sum of the charging and discharging power at the last time point of the distributed intelligent power grid is lower than the maximum charging power of the energy storage system, otherwise setting the electric power under the electric power grid to be equal to the missing power of the distributed intelligent power grid at the time point; the charging and discharging power of the energy storage system is positive value to represent charging power, and is negative value to represent discharging power.
2. The control method of a distributed smart grid according to claim 1, wherein when the inverse power of the distributed smart grid is greater than a set inverse power threshold, performing inverse power consumption control on each system in the distributed smart grid, the control method of inverse power consumption includes: when the state of charge of the energy storage system is in an economic operation interval of the state of charge, and the sum of the charging and discharging power and the inverse power of the energy storage system at the current moment is smaller than or equal to the maximum charging power of the energy storage system, the charging and discharging power of the energy storage system is controlled to be adjusted to the sum of the charging and discharging power and the inverse power of the energy storage system at the current moment.
3. The method for controlling a distributed smart grid according to claim 2, wherein the method for controlling reverse power consumption further comprises controlling the charge and discharge power of the energy storage system to be adjusted to the maximum charge power of the energy storage system when the state of charge of the energy storage system is in an economic operation interval of the state of charge and the sum of the charge and discharge power of the energy storage system and the reverse power is greater than the maximum charge power of the energy storage system at the present moment, and consuming the remaining reverse power by limiting the output power of the new energy power generation system, wherein the output power after limiting the new energy power generation system is as follows: ; In the formula, The output power after being limited by the new energy power generation system at the current moment t, Planning power for the new energy power generation system at the current time t, For the inverse power of the distributed smart grid at the current moment, For the maximum discharge power of the energy storage system, And the power is charged and discharged at the previous moment of the energy storage system.
4. The method of claim 2, further comprising consuming the reverse power of the distributed smart grid by limiting the output power of the new energy power generation system when the state of charge of the energy storage system is outside an economic operation interval of the state of charge.
5. The control method of a distributed smart grid according to claim 1, wherein the method for calculating the unit discharge cost of the energy storage system is as follows: ; wherein C st is the unit discharge cost of the energy storage system.
6. The method for controlling a distributed smart grid as set forth in claim 1, wherein the method for planning operation of the distributed smart grid further comprises, when determining that the power surplus of the distributed smart grid is at a certain point in time, dissipating the surplus power of the distributed smart grid by adjusting the planned charge and discharge power of the energy storage system.
7. The method for controlling a distributed smart grid according to claim 6, wherein the method for consuming surplus power of the distributed smart grid by adjusting the planned charge and discharge power of the energy storage system comprises: And if the sum of the surplus power of the distributed intelligent power grid at the current time point and the charging and discharging power of the energy storage system at the previous time point is smaller than or equal to the maximum charging power of the energy storage system, regulating the planned charging and discharging power of the energy storage system at the current time point to be equal to the sum of the surplus power of the distributed intelligent power grid at the current time point and the planned charging and discharging power of the energy storage system at the previous time point.
8. The method for controlling a distributed smart grid according to claim 7, wherein if the sum of surplus power of the distributed smart grid at the current time point and charging/discharging power of the energy storage system at the previous time point is greater than the maximum charging power of the energy storage system, setting the planned charging/discharging power of the energy storage system at the current time point to be equal to the maximum charging power, and setting the planned output power of the new energy power generation system at the current time point to be as follows: ; In the formula, The planned output power of the current time point i of the new energy power generation system is obtained; The output power prediction result of the current time point i of the new energy power generation system is obtained; for the surplus power and the shortage power of the current time point i of the distributed intelligent power grid, positive values represent surplus power, and negative values represent shortage power; Maximum discharge power of the energy storage system; For the previous time of the energy storage system the charge-discharge power of the dot.
9. A controller of a distributed smart grid, comprising a processor, wherein the processor, when executing a computer program, implements a method of controlling a distributed smart grid as claimed in any one of claims 1-8.
10. A computer-readable storage medium, characterized in that it has stored therein a computer program which, when executed, implements the control method of a distributed smart grid as claimed in any one of claims 1-8.

Description

Control method, controller and computer readable storage medium of distributed intelligent power grid Technical Field The invention belongs to the technical field of power system dispatching, and particularly relates to a control method, a controller and a computer readable storage medium of a distributed intelligent power grid. Background The distributed intelligent power grid has the advantages of realizing the local consumption of distributed new energy, enhancing the controllable and adjustable level of the distributed new energy, improving the autonomous capacity of the regional power grid and supporting the stable operation of the large power grid through the source network load storage integrated multi-element interaction mode, so that the distributed intelligent power grid is widely applied in the field of power system dispatching and is widely applied to typical scenes such as distributed new energy grid-connected consumption, power supply guarantee in remote areas, personalized energy consumption requirements in industrial and commercial parks and the like. The requirements of the current power system dispatching technical field on the distributed intelligent power grid are mainly self-digestion, and the control principle of reversely transmitting power to the power grid is avoided as much as possible. In order to adapt to the control principle, a series of technical means for preventing the distributed intelligent power grid from generating reverse power are proposed in the prior art. For example, the chinese patent application with application publication No. CN119726981a proposes an energy control method for an optical storage micro-grid, where an inverse power control amount threshold is set, the inverse power control amount threshold is compared with active power of the optical storage micro-grid, so as to control an inverter of the optical storage micro-grid, when the target power is smaller than the inverse power control amount threshold, the inverter of each system in the optical storage micro-grid is controlled to meet the technical scheme of power shortage, the scheme preferentially meets the power shortage from the interior of the optical storage micro-grid, and the priority of generating power by an energy storage system to meet the power shortage is generally higher, but the discharge of the energy storage system is also inherently higher in cost and is also higher than the real-time electricity price of the grid at some time, at the moment, the method of using the energy storage system discharge to make up for the power shortage is poor in economical efficiency, and meanwhile, the method is passive control, does not take an advanced active prevention measure for the volatility of a distributed new energy source, and cannot reasonably use the energy storage system. Disclosure of Invention The invention aims to provide a control method, a controller and a computer readable storage medium of a distributed intelligent power grid, which are used for solving the technical problems of higher power generation cost of an energy storage system and poor power shortage economy of the distributed intelligent power grid in the prior art. In order to solve the technical problems, the invention provides a control method of a distributed intelligent power grid, which comprises the following steps: when the reverse power of the distributed intelligent power grid is smaller than or equal to a set reverse power threshold, controlling the distributed intelligent power grid according to a preset distributed intelligent power grid work plan; The method for formulating the distributed intelligent power grid work plan comprises the steps of judging whether power of a distributed intelligent power grid is lost or not in a future period of time, comparing unit discharge cost of an energy storage system with unit purchase cost of the power grid at a certain time point when judging that the power of the distributed intelligent power grid is lost at the time point, setting the charging and discharging planned power of the energy storage system at the time point to be equal to the sum of the charging and discharging planned power at the last time point and the distributed intelligent power grid lost if the unit discharge cost of the energy storage system is lower than the unit purchase cost of the power grid at the time point and the sum of the charging and discharging power at the last time point of the distributed intelligent power grid is lower than the maximum charging power of the energy storage system, otherwise setting the electric power under the electric power grid to be equal to the missing power of the distributed intelligent power grid at the time point; the charging and discharging power of the energy storage system is positive value to represent charging power, and is negative value to represent discharging power. Further, when the reverse power of the distributed intelligent power grid is larger tha