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柴油发电机组的机组类型应该如何选择? How to choose the type of diesel generator set?

作者:admin 浏览量:142 来源:本站 时间:2024-08-28 09:51:43

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柴油发电机组在生活中有着非常重要的作用,但是大家在选择的时候还是不知道如何选择适合自己的类型,今天就为大家详细讲解下柴油发电机组的几种类型。
在选择柴油发电机机组时,考虑的因素主要有:机组的用途、机械与电气性能、负荷的容量与变化范围、机组的使用环境条件(包括海拔高度、气候条件、噪声)、自动化功能等。由于柴油发电机组可用于常用、备用和应急等3种情况,因此不同用途对柴油发电机组的要求就有所区别。
一、常用机组选择
常用柴油发电机组是指在无市电情况下使用柴油发电机组做为主用电源。使用时间长、机械损耗高、故障高。这种情况下建议最低配置应为国产一线品牌柴油机,也可以选择合资、进口品牌。
二、备用机组选择
备用柴油发电机组是指市电基本正常,只有偶尔停电时做临时发电使用。使用频率不高、使用时间短、机械损耗低、故障低。这种情况下没必要一味追求高端进口柴油机配置的机组,一般国产柴油机配置的机组就能完全满足使用。油耗、噪音、故障率、大修时间这些指标没必要考虑太多。
三、应急机组选择
应急柴油发电机组一般宜选用高速、增压、油耗低、同容量的柴油发电机组。高速增压柴油机单机容量较大,占据空间小;柴油机选用配电子或液压调速装置,调速性能较好;发电机宜选用配无刷励磁或相复励装置的同步电机,较可靠,故障率低,维护检修较方便。

与三相电动机匹配需注意的问题。柴油发电机组与三相电机容量选配时,必须考虑到负载的启动电流。同时需要注意额定功率和后备功率的关系,KVA和KW的关系。KVA是视在功率,KW是有效功率,他们之间的关系为1KVA=0.8KW。进口机组一般用KVA表示功率单位,而国内用电设备一般都用KW表示。所以核算功率时应把KVA打8折换算成KW。

Diesel generator sets play a very important role in daily life, but people still don't know how to choose the type that suits them. Today, we will explain in detail several types of diesel generator sets.

When choosing a diesel generator set, the main factors to consider include: the purpose of the set, mechanical and electrical performance, load capacity and variation range, environmental conditions for the use of the set (including altitude, climate conditions, noise), automation functions, etc. Due to the fact that diesel generator sets can be used in three situations: common, backup, and emergency, the requirements for diesel generator sets vary depending on their usage.

1、 Common Unit Selection

The commonly used diesel generator set refers to the use of a diesel generator set as the main power source in the absence of mains electricity. Long usage time, high mechanical wear and tear, and high failure rate. In this case, it is recommended that the minimum configuration should be a domestically produced first-line brand diesel engine, and joint venture or imported brands can also be chosen.

2、 Selection of standby units

A backup diesel generator set refers to a temporary power generation unit that operates normally with only occasional power outages. Low frequency of use, short usage time, low mechanical wear and tear, and low failure rate. In this case, there is no need to blindly pursue units with high-end imported diesel engine configurations. Generally, units with domestically produced diesel engine configurations can fully meet the needs of use. There is no need to consider too many indicators such as fuel consumption, noise, failure rate, and overhaul time.

3、 Emergency Unit Selection

Emergency diesel generator sets are generally recommended to use high-speed, turbocharged, low fuel consumption, and same capacity diesel generator sets. High speed turbocharged diesel engines have a larger single unit capacity and occupy less space; Diesel engines are equipped with electronic or hydraulic speed control devices, which have good speed control performance; Synchronous motors with brushless excitation or phase compound excitation devices should be selected for generators, which are more reliable, have a low failure rate, and are easier to maintain and repair.

Issues to be noted when matching with three-phase motors. When selecting the capacity of diesel generator sets and three-phase motors, the starting current of the load must be considered. Attention should also be paid to the relationship between rated power and backup power, as well as the relationship between KVA and KW. KVA is apparent power, KW is effective power, and their relationship is 1KVA=0.8KW. Imported power units are generally expressed in KVA, while domestic electrical equipment is generally expressed in KW. So when calculating power, KVA should be converted to KW at a 20% discount.


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