眾所周知，主要是為了滿足大負(fù)荷或不間斷供電要求、保證瓦斯發(fā)電機(jī)組供電的可靠性、提高供電質(zhì)量、增加運(yùn)行的靈活性，做到經(jīng)濟(jì)運(yùn)行，那么在此類情況下往往需要啟動(dòng)兩臺(tái)或多臺(tái)機(jī)組同時(shí)對負(fù)載進(jìn)行供電。那么兩臺(tái)或多臺(tái)發(fā)電機(jī)組并聯(lián)運(yùn)行操作是怎么回事呢？

As we all know, it is mainly to meet the requirements of large load or uninterrupted power supply, ensure the reliability of power supply of gas generating units, improve the quality of power supply, increase the flexibility of operation, and achieve economic operation. In such cases, it is often necessary to start two or more units to supply power to the load at the same time. So what about the parallel operation of two or more generator sets?

瓦斯發(fā)電機(jī)組并聯(lián)運(yùn)行原理

Parallel operation principle of gas generator set

通俗、廣義的理解即就是兩臺(tái)或兩臺(tái)以上的發(fā)電機(jī)組在相位、電壓、頻率一致的情況下，通過自動(dòng)同步系統(tǒng)（多為同步表）來實(shí)現(xiàn)的并聯(lián)合閘的動(dòng)作，通過功率分配器來分配機(jī)組間的負(fù)荷承擔(dān)，通過末端負(fù)載需求量來確定投入需并聯(lián)開機(jī)臺(tái)數(shù)，直至完成發(fā)電任務(wù)解列空載運(yùn)行，通過上述一系列動(dòng)作繼而實(shí)現(xiàn)并聯(lián)運(yùn)行的全過程。

In a popular and broad sense, it means that two or more generator units realize the action of combined switch through automatic synchronization system (mostly synchronization meter) under the condition of consistent phase, voltage and frequency, distribute the load between units through power distributor, and determine the number of parallel start-up units required for input through terminal load demand until the power generation task is completed and the no-load operation is disconnected, Through the above series of actions, the whole process of parallel operation is realized.

瓦斯發(fā)電機(jī)組并聯(lián)運(yùn)行條件

Parallel operation conditions of gas generator set

1、應(yīng)確保待并機(jī)組的機(jī)況要求非常良好，好是全新設(shè)備在出廠前由具有生產(chǎn)、調(diào)試并聯(lián)系統(tǒng)資質(zhì)或的廠家定制好，這種如果屬于運(yùn)行已久或者臨時(shí)購買的機(jī)組尤其需要注意：

1. It shall be ensured that the conditions of the units to be combined are very good. The good thing is that the brand-new equipment is customized by the manufacturer with the qualification or patent for production and commissioning of parallel system before leaving the factory. In particular, if the unit has been in operation for a long time or is temporarily purchased, attention shall be paid to:

單臺(tái)機(jī)組運(yùn)行時(shí)能確保電壓、頻率、等重要指標(biāo)在空載運(yùn)行或負(fù)荷下運(yùn)行均正常。

During the operation of a single unit, it can ensure that the voltage, frequency and other important indicators operate normally under no-load operation or load.

好是同種品牌、同種功率、同種調(diào)速方式、調(diào)壓方式為自動(dòng)調(diào)壓式；特別需要強(qiáng)調(diào)的是盡可能的將功率要同等或成比例累加。

The good thing is that the same brand, the same power, the same speed regulation mode and voltage regulation mode are automatic voltage regulation; It should be emphasized that the power should be accumulated equally or proportionally as far as possible.

2、在并聯(lián)運(yùn)行時(shí)必須避免產(chǎn)生巨大的沖擊電流，以防止同步發(fā)電機(jī)組受到損壞、電網(wǎng)遭受干擾。

2. During parallel operation, huge impulse current must be avoided to prevent the synchronous generator unit from being damaged and the power grid from being disturbed.

3、在上述要求均滿足的情況下在電氣上還要滿足以下4個(gè)基本條件：

3. Under the condition that the above requirements are met, the following four basic conditions shall be met electrically:

相序待并發(fā)電機(jī)組輸出電壓的相序必須和已運(yùn)行發(fā)電機(jī)組的相序一致；

Phase sequence the phase sequence of the output voltage of the generator set to be paralleled must be consistent with the phase sequence of the operating generator set;

頻率待并發(fā)電機(jī)組輸出電壓的頻率和已運(yùn)行發(fā)電機(jī)組的頻率相等；

Frequency the frequency of output voltage of the generator set to be paralleled is equal to the frequency of the generator set already in operation;

電壓待并發(fā)電機(jī)組的電壓和已運(yùn)行發(fā)電機(jī)組的電壓相等；

Voltage the voltage of the generator set to be paralleled is equal to that of the generator set already in operation;

相位待并發(fā)電機(jī)組輸出電壓的相位和已運(yùn)行發(fā)電機(jī)組電壓的相位相同。

The phase of the output voltage of the generator set to be paralleled is the same as that of the generator set that has been operated.

上述條件不滿足任何一條，都會(huì)因瞬時(shí)值不等而出現(xiàn)環(huán)流。環(huán)流通俗的理解就是機(jī)組的空載并聯(lián)的情況下某臺(tái)或數(shù)臺(tái)機(jī)組出現(xiàn)視在可見負(fù)荷，如果環(huán)流過大會(huì)導(dǎo)致機(jī)組功率虛高而出現(xiàn)過流保護(hù)提前工作的弊病。

If none of the above conditions is satisfied, circulation will occur due to different instantaneous values. The common understanding of circulating current is that under the condition of no-load parallel connection of units, one or several units have apparent load. If the circulating current is too large, the unit power will be falsely high and the overcurrent protection will work in advance.

然而發(fā)電機(jī)組并聯(lián)運(yùn)行也不是一件簡單的事，以上我們就進(jìn)行了基礎(chǔ)的講解，您可以參考使用，當(dāng)然要根據(jù)實(shí)際情況來做調(diào)整，更多內(nèi)容的了解就來我們網(wǎng)站www.51credits.cn關(guān)注看看看吧！

However, the parallel operation of generator sets is not a simple thing. We have explained the basics above. You can use them for reference. Of course, it should be adjusted according to the actual situation. For more information, please visit our website at www.51credits.cn Pay attention to it. Www. 68mn!