CN108830420B - Grounding variable capacity optimization calculation method - Google Patents

Grounding variable capacity optimization calculation method Download PDF

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Publication number
CN108830420B
CN108830420B CN201810636484.7A CN201810636484A CN108830420B CN 108830420 B CN108830420 B CN 108830420B CN 201810636484 A CN201810636484 A CN 201810636484A CN 108830420 B CN108830420 B CN 108830420B
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Prior art keywords
grounding
transformer
station
variable capacity
capacity
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CN108830420A (en
Inventor
胡振兴
杨韬
丁唯
彭勇
杨毅伟
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Southwest Electric Power Design Institute Co Ltd of China Power Engineering Consulting Group
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Southwest Electric Power Design Institute Co Ltd of China Power Engineering Consulting Group
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q10/00—Administration; Management
    • G06Q10/04—Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
    • G06Q50/06—Electricity, gas or water supply

Abstract

The invention discloses a grounding variable capacity optimization calculation method, which comprises the steps of combining a station transformer with grounding transformer and fully utilizing the overload capacity of the station transformer; and optimizing a capacity calculation formula or method of the grounding transformer. The invention can reduce the grounding variable capacitance and has good optimization effect compared with the traditional technical method.

Description

Grounding variable capacity optimization calculation method
Technical Field
The invention relates to a grounding variable capacity optimization calculation method.
Background
According to the specifications of DL/T5222-:
Figure GDA0001724290960000011
wherein:
[1]SN-a Z-type variable capacity;
[2]UN-the collector system nominal line voltage;
[3]IR-specifying a ground resistance current;
[4] 10.5-dry-to-10 s overload factor, according to IEEE-C62.92.3 standard;
[5]SZ-a station varactor when combined with a station varactor.
The grounding variable capacity is calculated for the current of the common grounding resistor without considering the station variable capacity according to the principle as shown in the table 1:
table 1: grounded varactor (kVA)
Figure GDA0001724290960000012
When calculated according to the principle, the grounding variable capacity investment is large.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a grounding variable capacity optimization calculation method.
The purpose of the invention is realized by the following technical scheme: a grounding variable capacity optimization calculation method is characterized in that a station transformer and a grounding transformer are combined, and overload capacity of the station transformer is fully utilized; the calculation formula of the capacity of the grounding transformer at this time is as follows:
Figure GDA0001724290960000013
wherein: sN-a Z-type variable capacity;
UN-the collector system nominal line voltage;
i-specified ground resistance current;
10.5-dry-to-10 s overload factor, according to IEEE-C62.92.3 standard;
SZ-a station varactor when combined with a station varactor.
The invention has the beneficial effects that: the station transformer and the grounding transformer are combined, the overload capacity of the station transformer is fully utilized, the grounding variable capacity is reduced, and the optimization effect is good.
Detailed Description
The technical solutions of the present invention are described in further detail below, but the scope of the present invention is not limited to the following.
The station transformer and the grounding transformer are combined, and the overload capacity of the station transformer is fully utilized. The calculation formula of the capacity of the grounding transformer at this time is as follows:
Figure GDA0001724290960000021
wherein: sz-station varactors.
For example, when the station varactor is 400kVA, the ratio of the grounded varactor to the ratio of the varactor at different specified resistance currents of 35kV is shown in table 2:
table 2: 35kV System ground Capacity contrast (kVA)
Figure GDA0001724290960000022
As can be seen from the comparison, by adopting the optimization calculation mode, the grounding variable capacity can be reduced by at least one level, and the optimization effect is better.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, it should be noted that any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (1)

1. A method for optimizing and calculating grounding variable capacity is characterized by comprising the following steps: the station transformer and the grounding transformer are combined, and the overload capacity of the station transformer is fully utilized; the capacity calculation formula of the grounding transformer is as follows:
Figure FDA0001700928770000011
wherein: sN-a Z-type variable capacity;
UN-the collector system nominal line voltage;
i-specified ground resistance current;
10.5-dry-to-10 s overload factor, according to IEEE-C62.92.3 standard;
SZ-a station varactor when combined with a station varactor.
CN201810636484.7A 2018-06-20 2018-06-20 Grounding variable capacity optimization calculation method Active CN108830420B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201810636484.7A CN108830420B (en) 2018-06-20 2018-06-20 Grounding variable capacity optimization calculation method

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CN108830420B true CN108830420B (en) 2021-07-27

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203826939U (en) * 2014-05-05 2014-09-10 中国电力工程顾问集团西北电力设计院 Electricity utilization system applied to high-voltage plant of large and medium-sized thermal power plant

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203826939U (en) * 2014-05-05 2014-09-10 中国电力工程顾问集团西北电力设计院 Electricity utilization system applied to high-voltage plant of large and medium-sized thermal power plant

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
10kV小电阻接地系统站用变配置方案研究;王楠 等;《电力勘测设计》;20141031(第5期);全文 *
接地变的参数确定和保护计算;许凯;《机电工程技术》;20110715;第40卷(第07期);全文 *

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