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Selection method of power supply operation mode for relay protection setting calculation

A technology for setting calculation and operation mode, applied to emergency protection circuit devices, electrical components, etc., can solve problems such as large amount of calculation, long time and hardware resources, consumption, etc., to achieve accurate calculation results and improve efficiency

Active Publication Date: 2018-08-14
ZHEJIANG UNIV
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AI Technical Summary

Problems solved by technology

[0003] Traditional auto-tuning software usually arranges and combines all possible operation modes when considering the selection of power supply operation modes, so that the calculation results are more accurate, but the calculation amount is huge, and it needs to consume more time and hardware resources.
On the other hand, this kind of automatic calculation based on enumeration often only has calculation results and lacks intermediate processes and steps of reasoning nature. The correctness and rationality of the calculation results are often questioned by users, which affects the practicability of automatic calculation.

Method used

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  • Selection method of power supply operation mode for relay protection setting calculation
  • Selection method of power supply operation mode for relay protection setting calculation
  • Selection method of power supply operation mode for relay protection setting calculation

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with accompanying drawing.

[0016] The present invention comprises the following steps:

[0017] Step 1. Calculate the power contribution coefficient of each power supply to the protection branch; specifically: i represents the node number where the power supply is located, C R(i) Indicates the power contribution coefficient of the power supply numbered i to the protection branch, p represents the head node number of the protection branch, q represents the end node number of the protection branch, Z ip Denotes the mutual impedance between nodes i and p, Z iq Denotes the mutual impedance between nodes i and q, Z Gi Indicates the equivalent impedance of the power supply numbered i, and N represents the total number of power supplies;

[0018] Step 2. Calculate the directivity of each power supply; specifically: if -90°≤∠C R(i) R(i) ≥90° or R(i) means C R(i) the phase angle;

[0019] Step 3. Calc...

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Abstract

The invention relates to a power supply operation mode selection method for relay protection setting calculation with power contribution coefficients being taken into consideration so as to solve the problem that an existing power supply operation mode selection method is low in calculating efficiency or not high in calculating precision. The method is characterized by calculating a power contribution coefficient of each power supply for a protection branch, and calculating directivity of each power supply; then, calculating a power contribution coefficient of each power supply for an auxiliary increasing branch, and modifying the directivity of each power supply; and finally, determining operation mode of each power supply when carrying out setting calculation on an auxiliary increasing coefficient and a branch coefficient according to the directivity of each power supply. The method improves efficiency of setting calculation and can provide an intermediate calculating result.

Description

technical field [0001] The invention belongs to the technical field of electric power systems, and in particular relates to a method for selecting a power supply operation mode considering a power supply contribution coefficient for relay protection setting calculation. Background technique [0002] The selection of power supply operation mode is an important content in the calculation of relay protection setting. The setting staff needs to make a reasonable selection of the size and mode of each power supply in the network, so as to calculate the maximum / minimum boost coefficient and branch coefficient and other key parameters. With the interconnection of power grids and the increase of new energy and distributed power generation, the topological structure of the power grid is becoming more and more complex, and the operation modes are more diverse, which makes it more difficult to choose the operation mode in the calculation of relay protection setting. How to choose the o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/26
CPCH02H7/26
Inventor 王慧芳陈梦骁何奔腾
Owner ZHEJIANG UNIV
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