某新建发电厂接入系统及电气部分设计

某新建发电厂接入系统及电气部分设计

摘要

生产和消费的电力系统是由发电、变电、输电、配电组成，其目的是将一次能源通过生成设备转换成电能，经变电站和配电系统给负载。电能的使用影响着社会、经济、生活等部分，而在我国电源布局中发电装置容量是总装机容量的75%。电气主接线电力系统的重要组成。与变电站运转的可靠性、灵活性和经济密切相关。影响着电气装置的选取、配电装置配置、继电保护和节制方法拟定。

在这篇文章中, 电厂初步设计的一部分,主要包含电线的形式、选取,短路电流的计算和高压电气设备的选择和验证；并作了防雷与接地。电气主接线的设计,选择电气设备(电气设备可以合理利用,既能保证设备产能需求,确保电气设备合理利用资源)、整体结构紧密,实现简单的目标和有效的监测和控制,降低投资成本。在最后所有电气设施,主要的电线,电气设备保护装置,使全部设计方案可以实现安全、可靠、经济和环境保护的目的向用户供电。

认识国内外电厂电气系统的近况和发展优势,检查数据,联合电力系统方向的专业课程和其他的设计和研究结果,了解电气系统设计主要观点,并总结研究计划,创新本身。根据其差别,现有的发电厂电气设计经历,在其基础上,提出了新的设计理念。

关键字：变压器；发电厂；电力系统；一次设计；电气设备

A design of electric system

for electric power plant

ABSTRACT

By the power generation，substation，transmission，distribution and composition of energy consumption and other aspects of production and consumption systems.Its function is a natural energy through electricity generation power plant into electricity，and then by transmission and substation systems and power distribution system will be supplied to the load center.

By reasonable Electric main wiring design, a reasonable choice of electrical equipment (electrical equipment can achieve adequate and reasonable use, both to ensure that equipment capacity requirements and ensure full use of resources for electrical equipment), compact overall layout, to achieve simple and efficient monitoring and control the purpose of reducing the cost of investment. In the final of all electrical equipment, the main electrical wiring, electrical equipment protection devices to optimize the entire design to achieve safe, reliable, economical and environmentally friendly user supply purposes. Understand and grasp the characteristics of current situation and development prospects at home and abroad a power plant electrical system, access to information, combined with the direction of power system design professional courses and others, the research results have learned to master the process and methods once the electrical system design, and induction, innovation their own research programs. Depending on local conditions, the power plant has been built on the basis of drawing on the experience of electrical design, wiring of the main electrical power plants, electrical equipment flat layout, electrical equipment selection, lightning protection, grounding and other aspects of a series of design ideas.

Electrical wiring is the main power plant and substation electrical design of the first part，also constitute an important part of power system.Determine the

main connection of the whole power system and power plants，substations their reliability，flexibility and economy are closely related.And selection of electrical equipment，power distribution device configuration，relay protection and control methods developed have greater impact.Energy use has permeated society，economy，all areas of life，while in our power structure of the total installed capacity of thermal power equipment capacity of 75%.This article is equipped with 6 sets 50MW generator in a large thermal power plant part of the preliminary design was completed for the electrical main wiring design.Including the electrical wiring in the form of the main comparison of options；main transformer，start / standby transformer and voltage transformer factory with the capacity calculation，the number and type of choice sets；short-circuit current calculation and high-voltage electrical equipment selection and validation；and made a transformer protection.

Keywords: transformer；power plant；power system；protection；electrical equipment