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燃气发电机组的优点及逆功率保护介绍

来源:https://www.huannengpower.cn/ 文章作者:济柴环能 发布时间:2022-07-04
一、发电质量好
1、 Good power generation quality
由于发电机工作时只有旋转运动,电调反应速度快,工作特别平稳,发电机输出电压和频率的精度高,波动小,在突加空减50%和75%负载时,机组集腋成裘驼行非常稳定。优于柴油发电机组的电气性能指标。
Because the generator only rotates when it works, the electric regulation reaction speed is fast, and the work is particularly stable. The accuracy of the generator output voltage and frequency is high, and the fluctuation is small. When the sudden air load is reduced by 50% and 75%, the unit is very stable. Better than the electrical performance index of diesel generator set.
二、启动性能好,启动成功率高
2、 Good startup performance and high startup success rate
从冷态启动成功后到满负载的时间仅为30秒钟,而规定柴油发电机启动成功后3分钟带负载。燃气轮发电机组可以任何环境温度和气候下保证启动的成功率。
The time from successful cold start to full load is only 30 seconds, while the international regulations stipulate that the diesel generator will be loaded 3 minutes after successful start. The gas turbine generator set can ensure the success rate of startup under any ambient temperature and climate.
三、噪声低振动小
3、 Low noise and vibration
由于燃汽轮机处于高速旋转状态,它的振动非常小,而且低频噪声优于柴油发电机组。
Because the gas turbine is in the state of high-speed rotation, its vibration is very small, and the low-frequency noise is better than that of diesel generator set.
四、采用的可燃性气体是清洁、廉价的能源
4、 The combustible gas used is clean and cheap energy
诸如:瓦斯气,秸秆气,沼气等,以它们为燃料的发电机组不仅运行可靠,成本低,而且能变废为宝,不会产生污染。
Such as gas, straw gas, biogas, etc. the generator set fueled by them not only operates reliably and has low cost, but also can turn waste into treasure without pollution.
发电机逆功率保护,用于保护汽轮机。当主汽门误关闭或机炉保护动作关闭主汽门而发电机出口开关未跳闸时,发电机变成电动机运行状态,此时发电机从系统吸收有功和无功,这种工况对发电机并无影响但由于鼓风损失,气轮机尾部叶片有可能过热,损坏尾部叶片而造成汽轮机事故。因此大机组不允许在这种工况下长时间运行,只允许运行几分钟。
The generator reverse power protection is used to protect the turbine. When the main throttle valve is closed by mistake or the turbine boiler protection action closes the main throttle valve and the generator outlet switch does not trip, the generator becomes the motor running state. At this time, the generator absorbs active and reactive power from the system. This working condition has no impact on the generator, but due to the loss of blast, the tail blades of the gas turbine may overheat and damage the tail blades, resulting in turbine accidents. Therefore, large units are not allowed to operate for a long time under this condition, only for a few minutes.
我国自行设计的发电机,以往不装设逆功率保护,但采取以下措施:
In the past, generators designed by our country were not equipped with reverse power protection, but the following measures were taken:
(1)采用联锁方法。当主汽门关闭后,用主汽门辅助接点,经延时切除发电机。上述方法虽然可行,但有不足之处,因为都不能正确地反映主汽门关闭情况。为了及时发现逆功率的异常工况,欧洲一些国家在发电机上配置有逆功率保护。逆功率保护其核心元件是逆功率继电器。逆功率继电器和功率方向继电器相似,只是在功率方向相反时动作,及时发出信号或延时动作切机。
(1) Adopt interlocking method. When the main throttle valve is closed, use the auxiliary contact of the main throttle valve to cut off the generator after time delay. Although the above methods are feasible, they have shortcomings, because they can not correctly reflect the closure of the main throttle valve. In order to find the abnormal working conditions of reverse power in time, some European countries have configured reverse power protection on generators. The core component of reverse power protection is reverse power relay. The reverse power relay is similar to the power direction relay, but it acts when the power direction is opposite, sending a signal in time or delaying the action to cut off the machine.
(2)主汽门关闭后,在控制室内发信号,如主汽门误关闭,检查之后可迅速恢复供汽,使机组正常运行,如几分钟恢复不了,可由值班员断开发电机出口开关。
(2) After the main throttle valve is closed, send a signal in the control room. If the main throttle valve is closed by mistake, the steam supply can be quickly restored after inspection to make the unit operate normally. If it cannot be restored in a few minutes, the operator on duty can turn off the outlet switch of the generator.
以上就是为大家介绍的有燃气发电机组配件的详细的介绍,希望对您有所帮助.如果您有什么疑问的话,欢迎联系我们.我们将以专业的态度,为您提供服务.https://www.huannengpower.cn
The above is a detailed introduction to the accessories of gas generator set. I hope it will help you If you have any questions, please contact us We will provide you with professional service https://www.huannengpower.cn

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