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D88尊龙發電機應裝哪些維護?它們的作用是什麼?

來源:http://dgxcbw.com   發布于:2019-03-01

發電機應裝哪些維護?它們的作用是什麼?

D88尊龙What maintenance should the generator be equipped with? What are their functions?

發電機維護和其他的成套負荷維護有些不同.由于發電機的勵磁電流和勵磁電壓和普通成套開關柜的電流電壓也有很大的區別.因而我們在維護裝設方面也有十分大的差距.爲了保證整個發電機組乃至整個電廠的平安牢靠運轉.我們就來詳細的談一下 關于發電機能夠發作的毛病和不正常任務形態,應依據發電機的容量有選擇地裝設以下維護。

Generator maintenance is somewhat different from other complete load maintenance. Because the excitation current and voltage of the generator are quite different from the current and voltage of the general switchgear, there is also a big gap in the maintenance and installation. In order to ensure the safe and reliable operation of the whole generator set and even the whole power plant, we will discuss in detail about the generator can be generated. The following maintenance shall be installed selectively according to the capacity of the generator for faults and abnormal task patterns.

D88尊龙1.縱聯差動維護:爲定子繞組及其引出線的相間短路維護。

1. Longitudinal Differential Maintenance: Maintenance of short circuit between stator windings and their lead-out wires.

2.橫聯差動維護:爲定子繞組一相匝間短路維護。只要當一相定子繞組有兩個及以上并聯分支而構成兩個或三個中性點引出端時,才裝設該種維護。

D88尊龙2. Transverse differential maintenance: maintenance for one-phase inter-turn short circuit of stator winding. This kind of maintenance is installed only when one phase stator winding has two or more parallel branches and constitutes two or three neutral point lead-out terminals.

沼氣發電機組

D88尊龙3.單相接地維護:爲發電機定子繞組的單相接地維護。

D88尊龙3. Single-phase grounding maintenance: single-phase grounding maintenance for generator stator windings.

D88尊龙4.勵磁回路接地維護:爲勵磁回路的接地毛病維護。

4. Grounding maintenance of excitation circuit: Maintenance for grounding fault of excitation circuit.

5.低勵.失磁維護:爲避免大型發電機低勵(勵磁電流低于靜穩極限所對應的勵磁電流)或得到勵磁(勵磁電流爲零)后,從零碎中吸收少量無功功率而對零碎發生不利影響,100MW及以上容量的發電機都裝設這種維護。

5. Low excitation. Loss of excitation maintenance: In order to avoid large generators with low excitation (excitation current is lower than the static stability limit corresponding to the excitation current) or get excitation (excitation current is zero), a small amount of reactive power is absorbed from the fragments, which adversely affects the fragmentation. Generators with 100 MW or more capacity are equipped with this maintenance.

6.過負荷維護:發電機長工夫超越額外負荷運轉時作用于信號的維護。中小型發電機只裝設定子過負荷維護;大型發電機應辨別裝設定子過負荷和勵磁繞組過負荷維護。

D88尊龙6. Overload Maintenance: Maintenance of the signal when the generator works long hours beyond the extra load. Small and medium-sized generators are only equipped with setter overload maintenance; large generators should distinguish between setter overload maintenance and excitation winding overload maintenance.

7.定子繞組過電流維護:當發電機縱差維護范圍外發作短路,而短路元件的維護或斷路器回絕舉措,這種維護作爲內部短路的后備,也兼作縱差維護的后備維護。

D88尊龙7. Stator winding over-current maintenance: When short-circuit occurs outside the maintenance range of generator longitudinal difference, and the maintenance of short-circuit components or circuit breaker rejection measures, this maintenance is used as backup of internal short-circuit, but also as backup maintenance of longitudinal difference maintenance.

8.定子繞組過電壓維護:用于避免忽然甩去全部負荷后惹起定子繞組過電壓,水輪發電機和大型汽輪發電機都裝設過電壓維護,中小型汽輪發電機通常不裝設過電壓維護。

8. Stator winding overvoltage maintenance: To avoid stator winding overvoltage caused by sudden drop of all loads. Hydro-generators and large turbo-generators are equipped with overvoltage maintenance. Small and medium-sized turbo-generators are usually not equipped with overvoltage maintenance.

9.負序電流維護:電力零碎發作不對稱短路或許三相負荷不對稱(如電氣機車.電弧爐等單相負荷的比重太大)時,會使轉子端部.護環內外表等電流密度很大的部位過熱,形成轉子的部分灼傷,因而應裝設負序電流維護。

9. Negative Sequence Current Maintenance: When the power is fragmented and asymmetrical short circuit or three-phase load is asymmetrical (such as electric locomotive and electric arc furnace, the proportion of single-phase load is too large), it will overheat the parts with high current density, such as the inner and outer surface of the retaining ring, and form partial burns of the rotor, so negative sequence current maintenance should be installed.

D88尊龙10.失步維護:反響大型發電機與零碎振蕩進程的失步維護。

10. Out-of-step maintenance: Out-of-step maintenance that responds to large generators and piecemeal oscillation processes.

11.逆功率維護:當汽輪機主汽門誤封閉,或機爐維護舉措封閉主汽門而發電機出口斷路器未跳閘時,從電力零碎吸收有功功率而形成汽輪機事故,故大型機組要裝設用逆功率繼電器構成的逆功率維護,用于維護汽輪機。

D88尊龙11. Reverse power maintenance: When the main valve of a steam turbine is wrongly closed or the main valve of a steam turbine is closed by furnace maintenance measures and the generator outlet circuit breaker is not tripped, the active power is absorbed from the power piecemeal to form a steam turbine accident. Therefore, large units should install reverse power maintenance consisting of reverse power relays to maintain the steam turbine.

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