请教：ABS船级社对1200KW的发电机组的要求

raymond_s@126.c · 发表于 2020-9-24 10:06

请教ABS船级社对1200KW的发电机组有什么额外保护要求吗？

江海直达 · 发表于 2020-9-24 19:52

我相信你说的，是差分保护。

raymond_s@126.c · 发表于 2020-9-25 07:18

江海直达发表于 2020-9-24 19:52
我相信你说的，是差分保护。

但我在ABS规范内没有找到明确要求说：1200KW的发电机要差动保护呀？是真没有要求，还是我没找到呀？别的船级社是有这个要求，我看到了。

wudi888_2000 · 发表于 2020-9-25 08:10

江海直达发表于 2020-9-24 19:52
我相信你说的，是差分保护。

电气大师在此，谁与争锋

江海直达 · 发表于 2020-9-25 08:59

raymond_s@126.c 发表于 2020-9-25 07:18
但我在ABS规范内没有找到明确要求说：1200KW的发电机要差动保护呀？是真没有要求，还是我没找到呀？别的 ...

这个要求应该藏在ABS规范，电气分册里，仔细找。
各个船级社要求一样。要求的根源出处在于国际电工委员会船舶装备的标准。

zdbzhang · 发表于 2020-9-25 09:10

SVR Part4, 4-8-2/9.11

9.11 Protection of Generators
9.11.1 Overload Protection
Generators are to be protected by circuit breakers providing long-time delay overcurrent protection not exceeding 15% above either the full-load rating of continuous-rated machines or the overload rating of special-rated machines. Alternatively, generators of less than 25 kW not arranged for parallel operation may be protected by fuses.
9.11.2 Short-circuit Protection (2016)
Generators are to be protected for short circuit by circuit breakers provided with short-time delay trips. For coordination with feeder circuit breakers, the short-time delay trips are to be set at the lowest values of current and time which will coordinate with the trip settings of feeder circuit breakers. The current setting of the short time delay trip is to be less than the steady state short-circuit current of the generator.
Where two or more AC generators are arranged for parallel operation, each generator’s circuit breaker is, in addition, to be provided with instantaneous trip set in excess of the maximum short-circuit contribution of the individual generator.
Alternative suitable protection, such as generator differential protection, which will trip the generator circuit breaker in the event of a fault in the generator or in the supply cable between the generator and its circuit breaker, would also be acceptable.
For generators of less than 200 kW driven by diesel engines or gas turbines which operate independently of the electrical system, consideration may be given to omission of the short-time delay trips if instantaneous trips and long-time overcurrent protection (see 4-8-2/9.11.1) are provided. When the short time delay trips are omitted, the thermal withstand capacity of the generator is to be greater than the steady state short-circuit current of the generator, until activation of the tripping system.
9.11.3 Thermal Damage Protection
Generator circuit breakers at the main and emergency switchboard are to have tripping characteristics and to be set such that they will open before the generator sustains thermal damages due to the fault current. See 4-8-2/9.7.
9.11.4 Reverse Power Protection (2006)
A reverse power protection device is to be provided for each generator arranged for parallel operation. The setting of the protective devices is to be in the range 2% to 6% of the rated power for turbines and in the range 8% to 15% of the rated power for diesel engines.
A setting of less than 8% of the rated power of diesel engines may be allowed with a suitable time delay recommended by the diesel engine manufacturer.
9.11.5 Prime Mover Shutdown
The shutting down of the prime mover is to cause the tripping of the generator circuit breaker.
9.11.6 Undervoltage Protection
Generators arranged for parallel operation are to be provided with means to prevent the generator circuit breaker from closing if the generator is not generating, and to open the same when the generator voltage collapses.
In the case of an undervoltage release provided for this purpose, the operation is to be instantaneous when preventing closure of the breaker, but is to be delayed for discrimination purposes when tripping a breaker.

Billy-TheTrave · 发表于 2020-9-27 08:51

楼主，先说结论，ABS目前版本的规范，IACS-UR-E标准对发电机差动保护没有要求。
目前的情况是除了ABS以外的船级社对于超过1200KW/1500KVA或者中压发电机，都有差动保护要求。
如果谁跟你说ABS有着要求，麻烦他把这几年的ABS规范截屏拿出来看看。