工程机械制造厂供电系统设计(电气工程系)
该设计是关于工程机械制造厂供电系统及变电所的设计。设计的思路是依据国家规范要求以及该厂二类负荷对供电可靠性的要求, 制定设计方案及供电措施。在该设计中,依据给定的设计范围和基础资料,建立起适合自身生产和发展需要的供电系统。该企业的供电系统由一条35KV高压进线和一条10KV高压进线电源提供,为确保负荷供电的可靠性,在高压侧又设有“单母线分段制”的电源供电方式,另外在两个车间变电所的低压侧设有联络线,从而使整个供电系统更具有其可靠性和灵活性。为适应机械类企业,用电负荷变化大、自然功率因数低的特点,该设计中采用并联电容器的方法来补偿无功功率,以减少供电系统的电能损耗和电压损失,同时提高了供电电压的质量。设计中体现了安全、可靠、灵活、经济的原则。确定高压变配电所的位置、形式、数量及主变台数与容量等;确定二次继电保护方案,选用先进的自动保护装置;确定变电所防雷过压保护与接地保护方案;根据设计要求,绘制全厂供配电系统图、二次继电保护电路图及高压变配电所平、剖图等 Abstract: in the design, based on the scope and basis for the design of information, and set up a production and development suited to their own needs electricity system. The enterprise distribution system by a 35KV high voltage line and into the high pressure into a 10KV power line to provide, in order to ensure the reliability of electricity load in a high-pressure side and the "single-bus bar above system" power supply, another workshop in two adjacent low voltage transformer substation with the line of contact, so that the entire power supply system more reliability and flexibility. To meet the mechanical type enterprises, large electricity load change, natural features low power factor, the design of a parallel connection capacitor approach to compensation without merit power, the electricity supply system to reduce wear and voltage loss, while enhancing the quality of power supply voltage. Design reflects a safe, reliable, flexible and economic principles. Determine the location-change distribution, form, quantity and the change in the number and capacity of Taiwan;Identify two relay programmes choice advanced automatic protection devices;Identify substations mine Guoyabaohu and grounded protection programme;According to the design requirements for the distribution chart mapping the entire plant, and two relay circuit diagram-change distribution as fair, and post maps. |