CN-122026376-A - Power grid voltage evaluation method and device based on elastic load

CN122026376ACN 122026376 ACN122026376 ACN 122026376ACN-122026376-A

Abstract

The application provides a power grid voltage evaluation method and device based on elastic load. The first corresponding relation between the historical power of the elastic load and the electricity utilization time can be generated according to the electricity utilization characteristic of the elastic load, the first corresponding relation is moved according to a preset time movement coefficient and a power adjustment coefficient, the second corresponding relation between the historical power of the elastic load and the electricity utilization time is obtained, and the power grid voltage is evaluated according to the second corresponding relation. The elastic load types considered include translatable load, transferable load, load S load reduction and load interruption, so that the accuracy of the power grid voltage evaluation result can be improved, and the accuracy of the power grid voltage evaluation result can also be improved.

Inventors

LI YAQIONG
WANG TONGXUN
ZHANG SHU

Assignees

中国电力科学研究院有限公司

Dates

Publication Date: 20260512
Application Date: 20251216

Claims (10)

1. A method for evaluating grid voltage based on elastic load, comprising: Generating a first corresponding relation between historical power and electricity utilization time of the elastic load according to electricity utilization characteristics of the elastic load; Moving the first corresponding relation according to a preset time movement coefficient and a power adjustment coefficient to obtain a second corresponding relation between the historical power of the elastic load and the power utilization time; evaluating the grid voltage according to the second corresponding relation; wherein the types of elastic loads include translatable loads, load shedding loads, and interruptible loads.
2. The method according to claim 1, wherein generating a first correspondence relationship between the historical power of the elastic load and the electricity consumption time according to the electricity consumption characteristics of the elastic load includes: judging the type of the elastic load according to the electricity utilization characteristic of the elastic load; Acquiring historical electricity utilization data of the translatable load, and generating a first corresponding relation between historical power and electricity utilization time of the translatable load according to the historical electricity utilization data of the translatable load; acquiring historical electricity utilization data of the transferable load, and generating a first corresponding relation between historical power of the transferable load and electricity utilization time according to the historical electricity utilization data of the transferable load; acquiring the load-reducible historical electricity consumption data, and generating a first corresponding relation between the load-reducible historical power and electricity consumption time according to the load-reducible historical electricity consumption data; and acquiring the historical electricity utilization data of the interruptible load, and generating a first corresponding relation between the historical power of the interruptible load and the electricity utilization time according to the historical electricity utilization data of the interruptible load.
3. The method according to claim 2, wherein the moving the first correspondence according to a preset time movement coefficient and a power adjustment coefficient to obtain a second correspondence between the historical power of the elastic load and the power consumption time includes: Moving a first corresponding relation between the historical power of the translatable load and the electricity utilization time according to a preset first time movement coefficient to obtain a second corresponding relation between the historical power of the translatable load and the electricity utilization time; Moving a first corresponding relation between the historical power of the transferable load and the electricity utilization time according to a preset first power adjustment coefficient to obtain a second corresponding relation between the historical power of the transferable load and the electricity utilization time; Moving the first corresponding relation between the historical power capable of reducing the load and the electricity utilization time according to a preset second time movement coefficient to obtain a second corresponding relation between the historical power capable of reducing the load and the electricity utilization time; and moving the first corresponding relation between the historical power of the interruptible load and the electricity utilization time according to a preset second power adjustment coefficient to obtain a second corresponding relation between the historical power of the interruptible load and the electricity utilization time.
4. The evaluation method according to claim 3, wherein the evaluating the grid voltage according to the second correspondence relationship includes: Constructing a topological structure of the power grid according to the first time movement coefficient, the second time movement coefficient, the first power adjustment coefficient, the second corresponding relation between the historical power of the translatable load and the power utilization time, the second corresponding relation between the historical power of the load which can be cut down and the power utilization time and the second corresponding relation between the historical power of the interruptible load and the power utilization time; and according to the second corresponding relation between the historical power of the translatable load and the electricity utilization time, the second corresponding relation between the historical power of the reducible load and the electricity utilization time and the second corresponding relation between the historical power of the interruptible load and the electricity utilization time, carrying out load flow calculation on the power grid by combining the topological structure of the power grid, and obtaining the voltages of all nodes in the power grid at different moments.
5. A resilient load based grid voltage assessment device, comprising: The generation module is used for generating a first corresponding relation between the historical power of the elastic load and the power utilization time according to the power utilization characteristic of the elastic load; the moving module is used for moving the first corresponding relation according to a preset time moving coefficient and a power adjusting coefficient to obtain a second corresponding relation between the historical power of the elastic load and the power utilization time; The evaluation module is used for evaluating the power grid voltage according to the second corresponding relation; wherein the types of elastic loads include translatable loads, load shedding loads, and interruptible loads.
6. The evaluation device according to claim 5, wherein the generating module is specifically configured to: judging the type of the elastic load according to the electricity utilization characteristic of the elastic load; Acquiring historical electricity utilization data of the translatable load, and generating a first corresponding relation between historical power and electricity utilization time of the translatable load according to the historical electricity utilization data of the translatable load; acquiring historical electricity utilization data of the transferable load, and generating a first corresponding relation between historical power of the transferable load and electricity utilization time according to the historical electricity utilization data of the transferable load; acquiring the load-reducible historical electricity consumption data, and generating a first corresponding relation between the load-reducible historical power and electricity consumption time according to the load-reducible historical electricity consumption data; and acquiring the historical electricity utilization data of the interruptible load, and generating a first corresponding relation between the historical power of the interruptible load and the electricity utilization time according to the historical electricity utilization data of the interruptible load.
7. The evaluation device according to claim 6, wherein the mobile module is specifically configured to: Moving a first corresponding relation between the historical power of the translatable load and the electricity utilization time according to a preset first time movement coefficient to obtain a second corresponding relation between the historical power of the translatable load and the electricity utilization time; Moving a first corresponding relation between the historical power of the transferable load and the electricity utilization time according to a preset first power adjustment coefficient to obtain a second corresponding relation between the historical power of the transferable load and the electricity utilization time; Moving the first corresponding relation between the historical power capable of reducing the load and the electricity utilization time according to a preset second time movement coefficient to obtain a second corresponding relation between the historical power capable of reducing the load and the electricity utilization time; and moving the first corresponding relation between the historical power of the interruptible load and the electricity utilization time according to a preset second power adjustment coefficient to obtain a second corresponding relation between the historical power of the interruptible load and the electricity utilization time.
8. The evaluation device according to claim 7, wherein the evaluation module is specifically configured to: Constructing a topological structure of the power grid according to the first time movement coefficient, the second time movement coefficient, the first power adjustment coefficient, the second corresponding relation between the historical power of the translatable load and the power utilization time, the second corresponding relation between the historical power of the load which can be cut down and the power utilization time and the second corresponding relation between the historical power of the interruptible load and the power utilization time; And according to the second corresponding relation between the historical power of the translatable load and the electricity utilization time, the second corresponding relation between the historical power of the reducible load and the electricity utilization time and the second corresponding relation between the historical power of the interruptible load and the electricity utilization time, carrying out load flow calculation on the power grid by combining the topological structure of the power grid, and obtaining the voltages of all nodes in the power grid at different moments.
9. A computer device, comprising: one or more processors; the processor is used for storing one or more programs; The evaluation method according to any one of claims 1 to 4, when said one or more programs are executed by said one or more processors.
10. A computer-readable storage medium, on which a computer program is stored, which computer program, when executed, implements the evaluation method according to any one of claims 1 to 4.

Description

Power grid voltage evaluation method and device based on elastic load Technical Field The application relates to the technical field of power systems, in particular to a power grid voltage evaluation method and device based on elastic load. Background Because of the demands of power grid peak regulation, voltage control and the like, power consumption behavior intervention can be performed on some power-adjustable power consumption loads, namely elastic loads, through means of electricity price optimization, additional excitation and the like so as to cooperate with power grid regulation. The elastic load is large in scale, has good regularity and high-level control automation, and therefore has great adjustable potential. The elastic load generally includes translatable load, transferable load, and the like. Translatable loads refer to loads that when powered up, power may vary as planned, but that require overall translation, powered up time spans multiple scheduling periods, such as general or special equipment manufacturing, data centers, and so forth. The transferable load is a load in which the total electricity consumption is kept unchanged when the demand is responded, but electricity is transferred according to information such as time-of-use electricity price, for example, agricultural and sideline food processing industry, an electric vehicle charging station, a 5G base station and the like. In the process of evaluating the power grid voltage in the related technology, a power curve of the elastic load is constructed according to the electricity utilization characteristic of the elastic load, and the power grid voltage is evaluated through the power curve. The accuracy and precision of the evaluation result are low because the type of elastic load generally considered is single. Disclosure of Invention In order to solve the problem of low accuracy and precision of an evaluation result in the prior art, the application provides a power grid voltage evaluation method and device based on elastic load. In a first aspect, the present application provides a method for evaluating a grid voltage based on elastic load, which may include: According to the electricity utilization characteristic of the elastic load, a first corresponding relation between the historical power of the elastic load and the electricity utilization time is generated. And moving the first corresponding relation according to a preset time movement coefficient and a power adjustment coefficient to obtain a second corresponding relation between the historical power of the elastic load and the power utilization time. And evaluating the grid voltage according to the second corresponding relation. The types of elastic loads include translatable loads, load shedding loads, and interruptible loads, among others. In some possible implementations, generating a first correspondence of historical power of the elastic load to a power usage time according to a power usage characteristic of the elastic load includes: and judging the type of the elastic load according to the electricity utilization characteristic of the elastic load. And acquiring historical electricity utilization data of the translatable load, and generating a first corresponding relation between the historical power of the translatable load and the electricity utilization time according to the historical electricity utilization data of the translatable load. And acquiring historical electricity data of the transferable load, and generating a first corresponding relation between the historical power of the transferable load and the electricity utilization time according to the historical electricity data of the transferable load. The method includes obtaining load-reducible historical electricity consumption data, and generating a first corresponding relation between load-reducible historical power and electricity consumption time according to the load-reducible historical electricity consumption data. And acquiring historical electricity utilization data of the interruptible load, and generating a first corresponding relation between the historical power of the interruptible load and the electricity utilization time according to the historical electricity utilization data of the interruptible load. In other possible implementations, the moving the first corresponding relation according to the preset time moving coefficient and the power adjusting coefficient to obtain a second corresponding relation between the historical power of the elastic load and the power utilization time includes: And moving the first corresponding relation between the historical power of the translatable load and the electricity utilization time according to a preset first time movement coefficient to obtain a second corresponding relation between the historical power of the translatable load and the electricity utilization time. And moving the first corresponding relation between the historical power o