JPH0467569B2 - - Google Patents
Info
- Publication number
- JPH0467569B2 JPH0467569B2 JP19676485A JP19676485A JPH0467569B2 JP H0467569 B2 JPH0467569 B2 JP H0467569B2 JP 19676485 A JP19676485 A JP 19676485A JP 19676485 A JP19676485 A JP 19676485A JP H0467569 B2 JPH0467569 B2 JP H0467569B2
- Authority
- JP
- Japan
- Prior art keywords
- fuel gas
- gas supply
- power generation
- supply capacity
- runback
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Engine Equipment That Uses Special Cycles (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、燃料ガス供給設備と、複数のガスタ
ービンを用いるコンバインドサイクル発電設備と
を直結した火力発電プラントに於て、例えば燃料
ガス供給設備側の機器の故障等により燃料ガス供
給能力が発電設備側の燃料ガス消費量を下回つた
場合に発電設備側の負荷を絞る所謂ランバツクを
行なうための制御装置に関する。Detailed Description of the Invention <Industrial Application Field> The present invention is applicable to a thermal power plant in which a fuel gas supply facility is directly connected to a combined cycle power generation facility using a plurality of gas turbines, for example, a fuel gas supply facility. The present invention relates to a control device for performing a so-called runback to reduce the load on the power generation equipment side when the fuel gas supply capacity falls below the fuel gas consumption amount on the power generation equipment side due to a failure of equipment on the power generation equipment side.
〈従来の技術〉
燃料ガス供給設備と発電設備とを直結した火力
発電プラントに於て、燃料ガス供給設備側の機器
の故障等により燃料ガス供給能力が発電設備側の
燃料ガス消費量を下回つた場合に、そのまま運転
を継続すると、発電設備側にタービントリツプが
発生し事故停止に至る虞れがある。そこで、従来
は運転員が燃料ガス設備側の機器の作動を監視
し、燃料ガス供給能力の低下に見合うように発電
設備側の負荷を絞るようにしていた。<Conventional technology> In a thermal power plant where fuel gas supply equipment and power generation equipment are directly connected, the fuel gas supply capacity may fall below the fuel gas consumption of the power generation equipment due to equipment failure on the fuel gas supply equipment side. In such a case, if the operation continues as it is, there is a risk that a turbine trip will occur on the power generating equipment side, leading to an accidental shutdown. Therefore, conventionally, operators monitored the operation of equipment on the fuel gas equipment side and reduced the load on the power generation equipment side to compensate for the decrease in fuel gas supply capacity.
このような場合には、例えば液化ガス気化器が
１台トリツプした場合に発電設備負荷を50％、或
いは30％絞るといつた具合に予め絞り込む負荷を
決めておくことができる。しかしながら手動によ
りランバツクを行なう場合には、或る程度の操作
遅れを避けることができず、ランバツクの遅れに
より発電設備側でトリツプが発生したり、急速な
ランバツクを行うことにより安全上の問題を生じ
得る虞れがある。 In such a case, the load to be reduced can be determined in advance, such as reducing the power generation equipment load by 50% or 30% when one liquefied gas vaporizer trips. However, when performing a runback manually, a certain amount of operational delay cannot be avoided, and a delay in the runback may cause a trip on the power generation equipment side, or a rapid runback may cause safety problems. There is a possibility of getting it.
特開昭54−50701号公報にはガス供給能力の余
裕値を常に計算しておき、余裕値がマイナスにな
つたとき、その分だけ自動的にランバツクを行な
う制御装置が提案されている。しかしながら、こ
のような制御装置は、発電所設備が従来形式の火
力発電プラントであつて、燃料消費量と発電量と
が１対１の対応関係にあり、ガス供給能力の不足
分が解れば、それに見合う分だけ発電設備負荷を
落としガス消費量を絞り込めば良い場合にのみ適
用可能である。しかるに、複数のガスタービンを
用いるコンバインドサイクル発電設備に於ては、
発電量が一定であつてもガスタービンの運転台数
によりガス消費量が異なるため供給ガス不足分が
解つても、発電設備負荷をどこまで絞れば良いか
を容易に決定することができない。 Japanese Unexamined Patent Publication No. 54-50701 proposes a control device that constantly calculates the margin value of the gas supply capacity, and when the margin value becomes negative, automatically performs a runback by that amount. However, such a control device can be used only if the power plant equipment is a conventional thermal power plant, where fuel consumption and power generation have a one-to-one correspondence, and if the shortage in gas supply capacity is determined, This method can only be applied in cases where it is sufficient to reduce the load on the power generation equipment by an amount corresponding to this and reduce the amount of gas consumed. However, in a combined cycle power generation facility using multiple gas turbines,
Even if the amount of power generation is constant, the amount of gas consumed varies depending on the number of gas turbines in operation, so even if the shortage of gas supply is resolved, it is not easy to determine to what extent the power generation equipment load should be reduced.
〈発明が解決しようとする問題点〉
このような従来技術の欠点に鑑み、本発明の主
な目的は、燃料ガス供給設備と複数のガスタービ
ンを用いるコンバインドサイクル発電設備とを直
結した火力発電プラントのための好適なランバツ
ク制御装置を提供することにある。<Problems to be Solved by the Invention> In view of the drawbacks of the prior art, the main object of the present invention is to provide a thermal power generation plant in which a fuel gas supply facility is directly connected to a combined cycle power generation facility using a plurality of gas turbines. An object of the present invention is to provide a suitable runback control device for.
〈問題点を解決するための手段〉
このような目的は、本発明によれば、燃料ガス
供給設備と、複数のガスタービンを用いるコンバ
インドサイクル発電設備とを直結した火力発電プ
ラントのランバツク制御装置であつて、前記燃料
ガス供給設備の各機器の燃料ガス供給能力を監視
する手段と、前記各機器の燃料ガス供給能力のう
ちから全体的な燃料ガス供給能力を律するものを
判別して全体的な燃料ガス供給能力を割出す手段
と、割出された燃料ガス供給能力が、前記発電設
備側の燃料ガス消費量を下回つた場合には、前記
燃料ガス消費量が前記燃料ガス供給能力を下回る
まで前記発電設備のガスタービンを順次緊急停止
する手段とを具備することを特徴とするランバツ
ク制御装置を提供することにより達成される。<Means for Solving the Problems> According to the present invention, such an object is to provide a runback control device for a thermal power plant that directly connects a fuel gas supply facility and a combined cycle power generation facility using a plurality of gas turbines. A means for monitoring the fuel gas supply capacity of each device of the fuel gas supply equipment, and a means for determining the fuel gas supply capacity of the respective devices that governs the overall fuel gas supply capacity. means for determining a fuel gas supply capacity, and when the determined fuel gas supply capacity is less than the fuel gas consumption of the power generation equipment, the fuel gas consumption is less than the fuel gas supply capacity; This is achieved by providing a runback control device characterized by comprising means for sequentially emergency stopping the gas turbines of the power generating equipment.
〈作用〉
このように、本発明によれば、燃料ガス供給能
力とガス消費量を比較しながらガスタービンを順
次停止していくため、上記したように発電設備を
絞り込む際の目標値を決定しなくとも適切かつ短
時間でランバツクが可能となる。<Operation> As described above, according to the present invention, since the gas turbines are sequentially stopped while comparing the fuel gas supply capacity and the gas consumption, the target value when narrowing down the power generation equipment is determined as described above. At the very least, runback can be performed appropriately and in a short time.
〈実施例〉
以下に添付の図面を参照して本発明を特定の実
施例について詳細に説明する。Embodiments The present invention will now be described in detail with reference to specific embodiments with reference to the accompanying drawings.
第１図は、本発明に基づく燃料ガス主管圧力制
御装置が適用された液化天然ガス（以下LNGと
いう。）を燃料とする火力発電プラントを単純化
して示した構成図である。液化天然ガス貯槽１に
貯留されたLNG９は、プライマリポンプ２及び
セカンダリポンプ３により、気化器例えばオープ
ンラツク式の気化器４に送り出され、熱源となる
海水などにより液化ガスは気化される。気化した
ガスは、燃料ガスとして燃料ガス主管５を経て発
電設備７に供給される。 FIG. 1 is a simplified configuration diagram of a thermal power plant using liquefied natural gas (hereinafter referred to as LNG) as fuel, to which a fuel gas main pipe pressure control device according to the present invention is applied. The LNG 9 stored in the liquefied natural gas storage tank 1 is sent to a vaporizer, for example, an open rack vaporizer 4, by a primary pump 2 and a secondary pump 3, and the liquefied gas is vaporized by seawater or the like serving as a heat source. The vaporized gas is supplied as fuel gas to the power generation equipment 7 via the fuel gas main pipe 5.
発電設備７に於ては、燃料ガスにより複数のガ
スタービンを運転し、ガスタービンの廃熱により
発生した蒸気を用いて蒸気タービンを駆動する所
謂コンバインドサイクル発電を行なう。 In the power generation equipment 7, so-called combined cycle power generation is performed in which a plurality of gas turbines are operated using fuel gas and steam generated from waste heat of the gas turbines is used to drive the steam turbines.
一方、LNG貯槽１内に貯蔵されたLNG９から
は外部入熱によりボイルオフガス（BOG）が発
生し、気相部１０に滞留する。その量は気温の上
昇と共に増大し、またLNGをオーシヤンタンカ
からタンク１内に受入れる際にも一時的に増大す
る。BOGは、圧縮機６により圧縮され、燃料ガ
ス主管５に送り込まれる。 On the other hand, boil-off gas (BOG) is generated from the LNG 9 stored in the LNG storage tank 1 due to external heat input, and remains in the gas phase section 10. The amount increases as the temperature rises, and also temporarily increases when LNG is received into tank 1 from the ocean tanker. BOG is compressed by the compressor 6 and sent to the fuel gas main pipe 5.
第２図はこのような発電プラントに於ける燃料
ガス供給設備８側の燃料ガス供給能力を割出す手
順を示す。例えば、プライマリポンプ２、セカン
ダリポンプ３及び液化ガス気化器４の能力を判定
する。全体としての燃料ガス供給能力は、これら
個々の機器の燃料ガス供給能力の最小値を選択
し、それにボイルオフガスの送出能力を加算して
得られる。 FIG. 2 shows a procedure for determining the fuel gas supply capacity of the fuel gas supply equipment 8 in such a power generation plant. For example, the capabilities of the primary pump 2, secondary pump 3, and liquefied gas vaporizer 4 are determined. The overall fuel gas supply capacity is obtained by selecting the minimum value of the fuel gas supply capacity of these individual devices and adding thereto the boil-off gas delivery capacity.
第３図は、燃料ガス設備側の故障等により、燃
料ガス供給能力が低下した場合のランバツク手順
を示すもので、燃料ガス供給能力を破線により示
し、燃料ガス消費量を実線にて示す。 FIG. 3 shows a runback procedure when the fuel gas supply capacity is reduced due to a failure on the fuel gas equipment side, and the fuel gas supply capacity is shown by a broken line, and the fuel gas consumption is shown by a solid line.
燃料ガス供給設備側のトラブルにより、時刻t0
に於て燃料ガス供給能力が燃料ガス消費量を下回
るまで低下した場合、例えば約３秒でガスタービ
ン１基を緊急停止する（時刻t1）。ガスタービン
を１基停止した場合でも燃料ガス供給能力が燃料
ガス消費量を下回つていれば、時刻t2に於て第二
のガスタービンを緊急停止する。この時点でも燃
料ガス供給能力が燃料ガス消費量を下回つていれ
ば、第三のガスタービンを緊急停止する（時刻
t3）。その結果、燃料ガス消費量が燃料ガス供給
能力を下回ることとなつたため、ランバツクを終
了する。 Due to a problem with the fuel gas supply equipment, time t 0
If the fuel gas supply capacity drops below the fuel gas consumption, one gas turbine is brought to an emergency stop, for example, in about 3 seconds (time t 1 ). Even if one gas turbine is stopped, if the fuel gas supply capacity is lower than the fuel gas consumption, the second gas turbine is urgently stopped at time t2 . If the fuel gas supply capacity is still below the fuel gas consumption at this point, the third gas turbine will be brought to an emergency stop (time
t3 ). As a result, the fuel gas consumption falls below the fuel gas supply capacity, so the runback is terminated.
コンバインドサイクル発電設備に於ては、ガス
タービンの緊急始動、緊急停止が比較的容易であ
つて迅速に行なうことができるために、上記した
ような手順でランバツクを行なえば、ランバツク
制御に要する論理が単純化され、常に適切かつ迅
速なランバツクが可能となる。 In combined cycle power generation equipment, emergency starting and stopping of the gas turbine can be performed relatively easily and quickly, so if runback is performed using the procedure described above, the logic required for runback control can be reduced. Simplified, always appropriate and quick runbacks are possible.
〈発明の効果〉
このように本発明によれば、自動的にしかも比
較的短時間でランバツク制御を行なうことができ
るため、発電設備側の異常停止を未然に防止する
ことができる。またランバツク制御が確実に行な
えることから、燃料ガス供給設備側の燃料ガス供
給能力の余裕度を小さくすることが可能となり、
例えばポンプ、或いは液化ガス気化器の予備機を
省略することも可能となる。<Effects of the Invention> As described above, according to the present invention, runback control can be performed automatically and in a relatively short time, so that abnormal stoppage of the power generation equipment can be prevented. In addition, since runback control can be performed reliably, it is possible to reduce the margin of fuel gas supply capacity on the fuel gas supply equipment side.
For example, it is also possible to omit a pump or a standby device for a liquefied gas vaporizer.
第１図は本発明が適用される火力発電プラント
の構成を単純化して示した構成図である。第２図
は本発明に基づくランバツク制御に於て燃料ガス
供給能力を割出すための手順を示すフロー図であ
る。第３図は本発明に基づくランバツクの制御手
順を示すグラフである。
１……液化ガス貯槽、２……プライマリポン
プ、３……セカンダリポンプ、４……液化ガス気
化器、５……燃料ガス主管、６……圧縮機、７…
…発電設備、８……燃料ガス供給設備、９……
LNG、１０……貯槽内気相部。
FIG. 1 is a diagram showing a simplified configuration of a thermal power plant to which the present invention is applied. FIG. 2 is a flowchart showing the procedure for determining the fuel gas supply capacity in runback control based on the present invention. FIG. 3 is a graph showing a runback control procedure according to the present invention. DESCRIPTION OF SYMBOLS 1...Liquefied gas storage tank, 2...Primary pump, 3...Secondary pump, 4...Liquefied gas vaporizer, 5...Fuel gas main pipe, 6...Compressor, 7...
...Power generation equipment, 8...Fuel gas supply equipment, 9...
LNG, 10... Gas phase part in the storage tank.
Claims (1)
用いるコンバインドサイクル発電設備とを直結し
た火力発電プラントのランバツク制御装置であつ
て、 前記燃料ガス供給設備の各機器の燃料ガス供給
能力を監視する手段と、 前記各機器の燃料ガス供給能力のうちから全体
的な燃料ガス供給能力を律するものを判別して全
体的な燃料ガス供給能力を割出す手段と、 割出された燃料ガス供給能力が、前記発電設備
側の燃料ガス消費量を下回つた場合には、前記燃
料ガス消費量が前記燃料ガス供給能力を下回るま
で前記発電設備のガスタービンを順次停止する手
段とを具備することを特徴とするランバツク制御
装置。[Scope of Claims] 1. A runback control device for a thermal power plant that directly connects a fuel gas supply facility and a combined cycle power generation facility using a plurality of gas turbines, which controls fuel gas supply to each device of the fuel gas supply facility. means for monitoring the capacity; means for determining the overall fuel gas supply capacity by determining which of the fuel gas supply capacities of the respective devices controls the overall fuel gas supply capacity; and the determined fuel. means for sequentially stopping the gas turbines of the power generation equipment, when the gas supply capacity falls below the fuel gas consumption of the power generation equipment, until the fuel gas consumption falls below the fuel gas supply capacity. A runback control device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19676485A JPS6258022A (en) | 1985-09-05 | 1985-09-05 | Runback controller for thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19676485A JPS6258022A (en) | 1985-09-05 | 1985-09-05 | Runback controller for thermal power plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6258022A JPS6258022A (en) | 1987-03-13 |
| JPH0467569B2 true JPH0467569B2 (en) | 1992-10-28 |
Family
ID=16363229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19676485A Granted JPS6258022A (en) | 1985-09-05 | 1985-09-05 | Runback controller for thermal power plant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6258022A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH035039U (en) * | 1989-05-31 | 1991-01-18 |
-
1985
- 1985-09-05 JP JP19676485A patent/JPS6258022A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6258022A (en) | 1987-03-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |