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发电机组的防雷措施的要求是什么?

返回 2021.06.16 来源:http://www.huannengpower.com
当雷击电波传导至发电机上时,波的陡度直接威胁匝间绝缘,尤其是头几匝。波越陡,头几匝间所承受的电压越大,匝间绝缘越易受到破坏。雷电波的幅值大小则威胁发电机的主绝缘。雷电波的幅值越大,导线与铁心间的电压就越高,绝缘就越易被击穿。因此,必须对发电机采取防雷措施。
When the lightning wave is transmitted to the generator, the steepness of the wave directly threatens the turn to turn insulation, especially the first few turns. The steeper the wave is, the higher the voltage between the first few turns is, and the easier the turn to turn insulation is damaged. The magnitude of lightning wave threatens the main insulation of generator. The larger the amplitude of lightning wave, the higher the voltage between the wire and the core, and the easier the insulation is to be broken down. Therefore, lightning protection measures must be taken for generators.
对发电机来讲,防雷措施的要求是要把雷电波的幅值和陡度限制在容许的范围内,以消除对发电机的危害。
For the generator, the requirement of lightning protection measures is to limit the amplitude and steepness of lightning wave within the allowable range, so as to eliminate the harm to the generator.
燃气发电机组
对有架空直配线路的发电机的防雷措施当流过发电机母线上FGD系列阀型避雷器的电流不超过3KA时,发电机的耐雷水平为50KA,发电机的防雷保护接线及其设备的选择都按此条件考虑。
For the lightning protection measures of the generator with overhead direct distribution line, when the current flowing through the FGD series valve type arrester on the generator bus does not exceed 3KA, the lightning withstand level of the generator is 50kA, and the lightning protection wiring and equipment selection of the generator are considered according to this condition.
其防雷方式一般包括两部分:一部分是装设在母线上的阀型避雷器及吸收电容器,避雷器的作用是限制雷击波的幅值,吸收电容器的作用是限制波的陡度;另一部分是进线保护,它的作用是对进线上传来的较强雷电波先进行一次削弱。发电机的防雷方式很多,可根据发电机容量、雷电活动的强弱和对供电可靠性的要求确定。
The lightning protection method generally includes two parts: one is the valve type arrester installed on the bus and the absorption capacitor. The function of the arrester is to limit the amplitude of lightning wave, and the function of the absorption capacitor is to limit the steepness of the wave; The other part is the incoming line protection, whose function is to weaken the stronger lightning wave from the incoming line. There are many lightning protection methods for generators, which can be determined according to the generator capacity, the intensity of lightning activity and the requirements of power supply reliability.
不论采用哪一种保护方式,一般应将母线处的来波陡度限制在7.5KV/μs以下;发电机处的来波陡度限制在5KV/μs以下;流过母线上的冲击电流幅值限制在3KA以下。
No matter which protection method is adopted, the incoming wave steepness at the bus should be limited to 7.5kv/ μ S or less; The steepness of incoming wave at generator is limited to 5kV/ μ S or less; The amplitude of impulse current flowing through the bus is limited to 3KA.
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发电机组的防雷措施的要求是什么?

当雷击电波传导至发电机上时,波的陡度直接威胁匝间绝缘,尤其是头几匝。波越陡,头几匝间所承受的电压越大,匝间绝缘越易受到破坏。雷电波的幅值大小则威胁发电机的主绝缘。雷电波的幅值越大,导线与铁心间的电压就越高,绝缘就越易被击穿。因此,必须对发电机采取防雷措施。
When the lightning wave is transmitted to the generator, the steepness of the wave directly threatens the turn to turn insulation, especially the first few turns. The steeper the wave is, the higher the voltage between the first few turns is, and the easier the turn to turn insulation is damaged. The magnitude of lightning wave threatens the main insulation of generator. The larger the amplitude of lightning wave, the higher the voltage between the wire and the core, and the easier the insulation is to be broken down. Therefore, lightning protection measures must be taken for generators.
对发电机来讲,防雷措施的要求是要把雷电波的幅值和陡度限制在容许的范围内,以消除对发电机的危害。
For the generator, the requirement of lightning protection measures is to limit the amplitude and steepness of lightning wave within the allowable range, so as to eliminate the harm to the generator.
燃气发电机组
对有架空直配线路的发电机的防雷措施当流过发电机母线上FGD系列阀型避雷器的电流不超过3KA时,发电机的耐雷水平为50KA,发电机的防雷保护接线及其设备的选择都按此条件考虑。
For the lightning protection measures of the generator with overhead direct distribution line, when the current flowing through the FGD series valve type arrester on the generator bus does not exceed 3KA, the lightning withstand level of the generator is 50kA, and the lightning protection wiring and equipment selection of the generator are considered according to this condition.
其防雷方式一般包括两部分:一部分是装设在母线上的阀型避雷器及吸收电容器,避雷器的作用是限制雷击波的幅值,吸收电容器的作用是限制波的陡度;另一部分是进线保护,它的作用是对进线上传来的较强雷电波先进行一次削弱。发电机的防雷方式很多,可根据发电机容量、雷电活动的强弱和对供电可靠性的要求确定。
The lightning protection method generally includes two parts: one is the valve type arrester installed on the bus and the absorption capacitor. The function of the arrester is to limit the amplitude of lightning wave, and the function of the absorption capacitor is to limit the steepness of the wave; The other part is the incoming line protection, whose function is to weaken the stronger lightning wave from the incoming line. There are many lightning protection methods for generators, which can be determined according to the generator capacity, the intensity of lightning activity and the requirements of power supply reliability.
不论采用哪一种保护方式,一般应将母线处的来波陡度限制在7.5KV/μs以下;发电机处的来波陡度限制在5KV/μs以下;流过母线上的冲击电流幅值限制在3KA以下。
No matter which protection method is adopted, the incoming wave steepness at the bus should be limited to 7.5kv/ μ S or less; The steepness of incoming wave at generator is limited to 5kV/ μ S or less; The amplitude of impulse current flowing through the bus is limited to 3KA.