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Evaluation method of main network source-network-load coordination based on line load rate characteristics

A line load and load coordination technology, applied in the direction of circuit devices, AC network circuits, electrical components, etc., can solve the problem of inconvenient identification of the main network

Active Publication Date: 2022-05-31
竺炜
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this indicator is the overall security indicator of the main network after all, and it is inconvenient to identify the problems of the main network, such as overloaded lines, uncoordinated lines and their timing difference characteristics, etc., and these are the key information for the operation and planning of the main network

Method used

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  • Evaluation method of main network source-network-load coordination based on line load rate characteristics
  • Evaluation method of main network source-network-load coordination based on line load rate characteristics
  • Evaluation method of main network source-network-load coordination based on line load rate characteristics

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Embodiment Construction

[0019]

[0022] T

[0024]

[0028] Singular value decomposition can be regarded as matrix principal component analysis, which is widely used in statistics. This data analysis method can be

[0029] In the main network, the load rate timing characteristics of each line are not completely the same. Similar to Fourier transform, by singular value

[0030]

[0032] T

[0036] 2.2 The dominant dynamic sequence of the load rate and the dominant dynamic balance index

[0037] The singular value decomposition is actually the transformation of the basis. the matrix T

[0038] Since σ

[0040]

[0043]

[0044] by u

[0045]

[0051] Similar to safety and stability, a very small number of heavy-load lines, or uncoordinated lines with "peculiar" load rate timing changes,

[0058] Suppose the node active load curve and total load curve of a typical Japanese-Chinese IEEE39 system are shown in Figure 1. Each unit

[0060] T

[0061] That is, the active load rate of the main network line is a...

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Abstract

Source-network-load coordination refers to the dynamic balance capability of system power. From the perspective of main network security, the key is the dynamic balance of the active load rate of each line under continuous power flow. The present invention's "main network source-network-load coordination evaluation method based on line load rate characteristics", based on the singular value decomposition of the line load rate time series matrix, analyzes and finds that the dominant array contains the key information of the dominant dynamic balance, while the secondary array Contains the load rate timing characteristics of uncoordinated lines. Therefore, according to the singular values ​​and left singular vectors of the dominant array, the overall coordination index of source-network-load is constructed, and a heavy-duty line identification method is proposed; according to the left and right singular vectors of the main secondary array, the main non- Recognition method of coordinating line and timing difference characteristics. Aiming at the high-dimensional random main network power flow distribution, the present invention proposes a practical method for evaluating source-network-load coordination using big data from the overall and local perspectives, which can provide key information for the safe operation and planning of large power grids.

Description

Evaluation method of main network source-net-load coordination based on line load rate characteristics technical field [0001] Large power grid operation and planning Background technique [0002] In the main network of 220Kv and above, each load is constantly changing, and the randomness of the power supply side is also caused by intermittent new energy. The large-scale access of the source will increase, and the large-scale random transfer of the power flow will lead to a large amount of calculation and difficulty in the security and stability verification. The way of doing things is difficult to formulate. Therefore, the concept of source-network-load coordination is proposed, that is, the three are economical and efficient through various forms of interaction. And safely improve the power dynamic balance capability of the power system, and maximize the utilization of energy resources. the core elements and The difficulty is to maintain a reasonable distribution of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/10Y02E40/30
Inventor 竺炜
Owner 竺炜