Power utilization design optimizing method for substation

An optimization method and a technology for substation power consumption, which are applied in the field of substations and can solve problems such as misconnection of the knife switch used for unwinding

Inactive Publication Date: 2013-12-18
洛阳恒光特种变压器有限公司
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AI Technical Summary

Problems solved by technology

[0006] (2) When the two substation transformers of 220 kV substation do not meet the conditions for parallel operation, the parallel operation of the station transformers should be strictly restricted, and the ring network power supply mode of the ring-breaking knife switch may appear to be mis-closed, resulting in two substations

Method used

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Embodiment Construction

[0015] 1. The rated capacity of the transformer can be fully utilized

[0016] D, ynll wiring transformer can make full use of the rated capacity of the transformer. For Y, yn12 transformers, when the three-phase load of the transformer is unbalanced, the neutral wire flowing through the secondary side is 3Io. The zero-sequence magnetic flux generated by the zero-sequence current passes through the oil tank and iron parts to form Hysteresis and eddy current loss make the transformer heat up. Moreover, the transformer operating regulations clearly stipulate that the neutral line current shall not be greater than 25% of the rated current of the secondary side.

[0017] For D, ynll wiring transformers, since the zero-sequence current can flow in both the primary side and the secondary side, the zero-sequence magnetic flux can cancel each other out, which can avoid the above-mentioned heating situation, and the transformer can run at full capacity in a single phase (33.3%...

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Abstract

A power utilization design optimizing method for a substation aims to modify wiring of substation transformers, power supply manners of substation power utilization load, device type selection, and the like. Wiring options of substation transformers, power supply manners of substation power utilization load, substation transformer selection and low-voltage apparatus selection are modified. Substation electric system design is quite important in electric design of the substation, substation electric system design must execute technological and economical policies of China and actively and carefully uses new technology and equipment which pass operation tests and technical evaluation so as to allow the design to accord to the principles of safety, reliability, advancing technology, economy, practicality, and consistency with national circumstances.

Description

technical field [0001] The invention relates to a substation, especially the optimization of the power consumption design of a 220KV substation. Background technique [0002] In the electrical design of the substation, the design of the station power system is a very important part. Station power design must implement the country's technical and economic policies, actively and prudently adopt new technologies and equipment that have passed the test of operation and technical appraisal, so that the design conforms to the principles of safety, reliability, advanced technology, economical applicability, and national conditions. [0003] The station transformers of 220 kV substations in the power system basically adopt Y, yn12 wiring. However, in the current "Technical Regulations on Power Design of Thermal Power Plants", it is stipulated that the low-voltage factory transformer should be connected with D, yn11. The industry standard JB 2426-92 "Technical Parameters and Requir...

Claims

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Application Information

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IPC IPC(8): H02B5/00H02B7/00
Inventor 孙民
Owner 洛阳恒光特种变压器有限公司
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