JPS62291402A - Load backup method upon rapid reduction in system frequency - Google Patents
Load backup method upon rapid reduction in system frequencyInfo
- Publication number
- JPS62291402A JPS62291402A JP13517686A JP13517686A JPS62291402A JP S62291402 A JPS62291402 A JP S62291402A JP 13517686 A JP13517686 A JP 13517686A JP 13517686 A JP13517686 A JP 13517686A JP S62291402 A JPS62291402 A JP S62291402A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- turbine
- stop valve
- steam
- bleed steam
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 14
- 238000010248 power generation Methods 0.000 claims abstract description 26
- 230000007423 decrease Effects 0.000 claims description 20
- 239000008400 supply water Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 239000010723 turbine oil Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Control Of Turbines (AREA)
Abstract
Description
【発明の詳細な説明】
３、発明の詳細な説明
［産業上の利用分野］
本発明は油気タービン全般に適用される系統周波数急減
時の負荷バックアップ方法に関するものである。Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a load backup method when a system frequency suddenly decreases, which is applied to oil-air turbines in general.
「従来の技術］
従来から、タービン発Ｎ別により構成される発電系統に
おいて、その系統周波数低減時の負荷上昇対策としては
第５図に示すように、周波数検出器１にて検出された系
統周波数と２周波数設定器２にて設定された周波数設定
値とを減算器３に導入し、両者の周波数偏差に応じてＭ
Ｗ ＤＥ〜ＩＡＮＤ （発電量指令）を補正し、ＧＯ
ＶＥＲＮＥＲ弁開度およびＢＯＩＬＥＲＭＡＳＴＥＲを
上昇させることにより、負荷を緩やかに上昇させて系統
周波数の安定化を図る方法が採られている。"Prior Art" Conventionally, in a power generation system configured by turbine generator N, as a countermeasure against load increase when the system frequency is reduced, as shown in Fig. 5, the system frequency detected by the frequency detector 1 has been and the frequency set value set by the 2-frequency setter 2 are introduced into the subtracter 3, and M is calculated according to the frequency deviation between the two.
W DE~IAND (power generation command) is corrected and GO
A method is adopted in which the load is gradually increased by increasing the VERNER valve opening and the BOILER MASTER to stabilize the system frequency.
なお第５図において、４は負荷設定器、５は負荷変化率
設定器、６は負荷上下限設定器、７は変化率制限器、８
は加算器、９は上下限制限器、１０は発Ｎ様出力検出器
、１１は主蒸気圧力検出器、１２は減算器、１３は制御
器、１４は減算器、１５は関数発生器、１６は制御器、
１７は加算器を夫々示すものである。In FIG. 5, 4 is a load setter, 5 is a load change rate setter, 6 is a load upper and lower limit setter, 7 is a rate of change limiter, and 8
9 is an adder, 9 is an upper and lower limit limiter, 10 is a generator-like output detector, 11 is a main steam pressure detector, 12 is a subtracter, 13 is a controller, 14 is a subtracter, 15 is a function generator, 16 is the controller,
Reference numeral 17 indicates an adder.
［発明が解決しようとする問題点］
ところで、上述した従来のような系統周波数低減時の負
荷上昇対策方法においては、次のような問題があった。[Problems to be Solved by the Invention] By the way, the above-mentioned conventional method for dealing with a load increase when reducing the system frequency has the following problems.
すなわち、特に低開発国や開発途上国では、−発電系統
当りの発電量が少ないことから系統周波数の急減が激し
く、かかる系統周波数の低減時にはプラント効率を無視
してでも。That is, especially in underdeveloped countries and developing countries, - the power generation amount per power generation system is small, so the system frequency decreases rapidly, and when such system frequency is reduced, even if plant efficiency is ignored.
発Ｎｍを増加させて系統周波数の安定維持を図るように
することが要求される。しかしながら、上述した従来の
ような系統周波数の安定化方法では、系統周波数の急減
に対応することが非常に困難である。It is required to maintain the stability of the grid frequency by increasing the emission Nm. However, with the above-described conventional system frequency stabilization method, it is very difficult to cope with a sudden decrease in the system frequency.
そこで本発明では、系統周波数の急減に対し。Therefore, the present invention deals with sudden decreases in system frequency.
発電のための主蒸気口を直接的に増加させて系統周波数
を速やかに回復し系統周波数の安定維持を図ることが可
能な系統周波数急減時の負荷バックアップ方法を提供す
ることを目的とする。The purpose of the present invention is to provide a load backup method when the system frequency suddenly decreases, which can directly increase the number of main steam ports for power generation, quickly recover the system frequency, and maintain stability of the system frequency.
［問題点を解決するための手段］
上記の目的を達成するために本発明では、タービン抽気
蒸気止弁を備えたタービン発電機により構成される発電
系統において、上記発電系統の周波数が急減して周波数
設定値よりも低くなった際に、上記タービン抽気蒸気止
弁を閉方向に動作させ（全開または半開させ）で、ター
ビン通過蒸気ｌを増加させるようにしたことを特徴とす
る。[Means for Solving the Problems] In order to achieve the above object, the present invention provides a power generation system including a turbine generator equipped with a turbine bleed steam stop valve, in which the frequency of the power generation system is rapidly reduced. The present invention is characterized in that when the frequency becomes lower than a set value, the turbine bleed steam stop valve is operated in the closing direction (full open or half open) to increase the amount of steam passing through the turbine.
［作用］
上述の方法においては、系統周波数の急減時に、タービ
ン抽気蒸気止弁を半開または全開させることにより、発
電に直接寄与していな−いタービン油気は減少または無
くなり、その分の蒸気が発電に寄与するようになること
から、発電機出力がその分だけ上昇して系統周波数が回
復することになる。[Operation] In the above method, when the system frequency suddenly decreases, by half-opening or fully opening the turbine bleed steam stop valve, the turbine oil that does not directly contribute to power generation is reduced or eliminated, and that steam is released. Since it will now contribute to power generation, the generator output will increase by that amount and the system frequency will recover.
［実施例コ
以下、本発明の一実施例について図面を参照して説明す
る。[Embodiment] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
第１図は、本発明による系統周波数急減時の負荷バック
アップ方法を実現するためのＨＰ抽気蒸気止弁制御回路
を示す構成図、第２図は同方法を適用するためのＢＴＧ
複合制御系統を示す構成図である。第１図において、１
８は系統周波数を検出する周波数検出器、１つは周波数
設定値を設定する周波数設定器、２０は周波数検出器１
８にて検出された系統周波数と９周波数設定器１９にて
設定された周波数設定値とを導入し、系統周波数が周波
数設定値よりも低くなると動作するモニターＳＷである
。また、ＮＯＴはノット回路、ＡＮＤはアンド回路、Ｏ
Ｒはオア回路であり、夫々図示のように組合わせ構成さ
れて、第２図におけるＨＰ抽気蒸気止弁に対する開指令
Ａあるいは閉指令Ｂを出力するようになっている。なお
、ＬＰ抽気蒸気止弁制御回路についても上述と同様に構
成されている。Fig. 1 is a configuration diagram showing a HP bleed steam stop valve control circuit for realizing the load backup method when the system frequency suddenly decreases according to the present invention, and Fig. 2 is a block diagram showing a BTG control circuit for applying the method.
FIG. 2 is a configuration diagram showing a composite control system. In Figure 1, 1
8 is a frequency detector that detects the system frequency, 1 is a frequency setter that sets a frequency setting value, and 20 is a frequency detector 1
This monitor SW introduces the system frequency detected at 8 and the frequency setting value set at 9 frequency setter 19, and operates when the system frequency becomes lower than the frequency setting value. Also, NOT is a NOT circuit, AND is an AND circuit, and O
R is an OR circuit, which is configured in combination as shown in the figure to output an open command A or a close command B to the HP bleed steam stop valve in FIG. Note that the LP bleed steam stop valve control circuit is also configured in the same manner as described above.
次に、かかる構成に基づく負荷バックアップ方法につい
て述べる。Next, a load backup method based on this configuration will be described.
まず１通常運転中（系統周波数が安定している時）には
プラント全体の効率を優先するため、タービン抽気蒸気
止弁は全開で各ヒーターに油気蒸気を送り、ヒーターに
て給水の温度を上昇させることに抽気蒸気が使用されて
いる。First, during normal operation (when the system frequency is stable), in order to prioritize the efficiency of the entire plant, the turbine bleed steam stop valve is fully open to send oil steam to each heater, and the heaters control the temperature of the feed water. Bleed steam is used for raising.
次に、このような状態から系統周波数が急減し、周波数
検出器１８にて検出される系統周波数の値が周波数設定
器１９にて設定された周波数設定値よりも低くなると、
これを検出してモニターＳＷが動作する。そしてこの時
、抽気蒸気止弁側■用Ｃ８を自動位置に入れておくこと
により、所定の論理条件が成立してＨＰ抽気蒸気止弁に
対し、閉指令Ｂが出力されてＨＰ抽気蒸気止弁が全閉ま
たは半開し、タービン油気蒸気が発電に直接寄与する主
蒸気に割当てられる。これにより、発電に寄与する主蒸
気量が増加して系統の発電量（負荷）がその分だけ増加
するため、系統周波数の低減が防止されることになる。Next, when the system frequency suddenly decreases from such a state and the value of the system frequency detected by the frequency detector 18 becomes lower than the frequency setting value set by the frequency setter 19,
Detecting this, the monitor SW operates. At this time, by placing C8 for the bleed steam stop valve side in the automatic position, a predetermined logical condition is established, and a close command B is output to the HP bleed steam stop valve. is fully closed or partially opened, and the turbine oil steam is allocated to main steam, which directly contributes to power generation. As a result, the amount of main steam that contributes to power generation increases, and the power generation amount (load) of the grid increases by that amount, thereby preventing a reduction in the grid frequency.
（この期間は、タービン抽気蒸気山が減少するため、ヒ
ーターは未使用またはそれに近い状態となってプラント
効率は低下するが、系統の発電ｍは増加する。）
第３図はボイラＭＣＲ（８４０Ｔ／Ｈ蒸発量）時の通常
運転中のタービンのヒートバランスを示すものであり、
また第４図はボイラＭＣＲ（８４０Ｔ／）−１蒸発ｍ＞
時のタービン抽気蒸気止弁１台のみ全開（Ｎｏ、６ヒー
ターカツト）にした時のヒートバランスを示すものであ
る。第３図においては、負荷は２６３．７ＭＷであるが
、第４図に示す如くタービン抽気蒸気止弁１台のみの全
開によって負荷は２７５ＭＷとなり、約１１．３ＭＷ（
薬４．２％）の負荷上昇となる。(During this period, the turbine bleed steam pile decreases, so the heater becomes unused or close to it, and the plant efficiency decreases, but the power generation m of the system increases.) Figure 3 shows the boiler MCR (840T/ It shows the heat balance of the turbine during normal operation at the time of H evaporation amount),
Also, Figure 4 shows boiler MCR (840T/)-1 evaporation m>
This figure shows the heat balance when only one turbine bleed steam stop valve is fully open (No. 6 heaters are cut). In Fig. 3, the load is 263.7 MW, but as shown in Fig. 4, when only one turbine bleed steam stop valve is fully opened, the load becomes 275 MW, which is approximately 11.3 MW (
drug load (4.2%).
なお、タービン抽気蒸気止弁はこの場合５台あり、これ
らの組合せ使用によってより多くの負荷上昇を行なうこ
とが可能である。In this case, there are five turbine bleed steam stop valves, and by using these in combination, it is possible to increase the load even more.
上述したように、タービン抽気蒸気止弁を１えたタービ
ン発電量により構成される発電系統において、発電系統
の周波数が急減して周波数設定値よりも低くなった際に
、タービン抽気蒸気止弁を開方向に動作させて全開また
は半開し、タービン通過蒸気口を増加させるようにした
ので、系統周波数の急減に対し２発電のための主蒸気日
を直接的に増加させて系統周波数を速やかに回復して系
統周波数の安定維持を図ることが可能となる。従って、
特に低開発国や開発途上国では、−発電系統当りの発電
量が少ないことから系統周波数の急減が激しく、かかる
系統周波数の低減時にはプラント効率を無視してでも２
発電量を増加させて系統周波数の安定維持を図るように
することが要求されるが、上述したような系統周波数の
安定化方法とすることにより、系統周波数の急減に容易
に対応できることになる。As mentioned above, in a power generation system consisting of turbine power generation with one turbine bleed steam stop valve, when the frequency of the power generation system suddenly decreases and becomes lower than the frequency set value, the turbine bleed steam stop valve is opened. Since the turbine is operated in the direction of full open or half open to increase the number of steam ports passing through the turbine, the system frequency can be quickly restored by directly increasing the main steam days for power generation in response to a sudden decrease in system frequency. This makes it possible to maintain stable grid frequency. Therefore,
Particularly in underdeveloped countries and developing countries, the power generation amount per power generation system is small, so the system frequency rapidly decreases, and when such system frequency is reduced, even if plant efficiency is ignored,
Although it is required to increase the amount of power generation to maintain stability of the grid frequency, by using the method of stabilizing the grid frequency as described above, it is possible to easily cope with a sudden decrease in the grid frequency.
［発明の効果〕
以上説明したように本発明によれば、タービン抽気蒸気
止弁を備えたタービン発電機により構成される発電系統
において、上記発電系統の周波数が急減して周波数設定
値よりも低くなった際に、上記タービン抽気蒸気止弁を
閉方向に動作させてタービン通過蒸気量を増加させるよ
うにしたので、系統周波数の急減に対し１発電のための
主蒸気伍を直接的に増加させて系統周波数を速やかに回
復し系統周波数の安定維持を図ることが可能な系統周波
数急減時の負荷バックアップ方法が提供できる。[Effects of the Invention] As explained above, according to the present invention, in a power generation system constituted by a turbine generator equipped with a turbine bleed steam stop valve, the frequency of the power generation system suddenly decreases to become lower than the frequency setting value. When this happens, the turbine bleed steam stop valve is operated in the closing direction to increase the amount of steam passing through the turbine, so the main steam capacity for one power generation can be directly increased in response to a sudden decrease in system frequency. It is possible to provide a load backup method when the system frequency suddenly decreases, which can quickly restore the system frequency and maintain stability of the system frequency.
第１図は本発明による系統周波数急減時の負荷バックア
ップ方法を実現するための抽気蒸気止弁制（財）回路の
構成図、第２図は同方法を通用するためのＢ丁Ｇ複合制
御系統を示す構成図、第３図は通常運転時のタービンの
ヒートバランスを示す図、第４図は周波数低減時等によ
りタービン抽気蒸気止弁を１台のみ全開にした時のヒー
トバランスを示す図、第５図は従来の周波数低減対策回
路を示す構成図である。
１・・・周波数検出器、２・・・周波数設定器、３・・
・減算器、４・・・負荷設定器、５・・・負荷変化率設
定器、６・・・負荷上下限設定器、７・・・変化率制限
器、８・・・加算器、９・・・上下限制限器、１０・・
・発電機出力検出器、１１・・・主蒸気圧力検出器、１
２・・・減算器、１３・・・制御器、１４・・・減算器
、１５・・・関数発生器、１６・・・制御器、１７・・
・加算器、１８・・・周波数検出器、１つ・・・周波数
設定器、２０・・・モニターＳＷ、ＮＯＴ・・・ノット
回路、ＡＮＤ・・・アンド回路、ＯＲ・・・オア回路。
出願人復代理人 弁理士 鈴江武彦
第 ５ 図Figure 1 is a block diagram of a bleed steam stop valve control circuit for realizing the load backup method when the system frequency suddenly decreases according to the present invention, and Figure 2 is a B/G complex control system for implementing the method. Fig. 3 is a diagram showing the heat balance of the turbine during normal operation, Fig. 4 is a diagram showing the heat balance when only one turbine bleed steam stop valve is fully open due to frequency reduction, etc. FIG. 5 is a block diagram showing a conventional frequency reduction countermeasure circuit. 1...Frequency detector, 2...Frequency setter, 3...
・Subtractor, 4...Load setter, 5...Load change rate setter, 6...Load upper and lower limit setter, 7...Change rate limiter, 8...Adder, 9.・・Upper/lower limit limiter, 10・・
- Generator output detector, 11... Main steam pressure detector, 1
2...Subtractor, 13...Controller, 14...Subtractor, 15...Function generator, 16...Controller, 17...
-Adder, 18...Frequency detector, 1...Frequency setter, 20...Monitor SW, NOT...NOT circuit, AND...AND circuit, OR...OR circuit. Applicant Sub-Agent Patent Attorney Takehiko Suzue Figure 5
Claims (1)
成される発電系統において、前記発電系統の周波数が急
減して周波数設定値よりも低くなった際に、前記タービ
ン抽気蒸気止弁を閉方向に動作させてタービン通過蒸気
量を増加させるようにしたことを特徴とする系統周波数
急減時の負荷バックアップ方法。In a power generation system constituted by a turbine generator equipped with a turbine bleed steam stop valve, when the frequency of the power generation system suddenly decreases and becomes lower than a frequency setting value, the turbine bleed steam stop valve is operated in a closing direction. A load backup method at the time of a sudden decrease in system frequency, characterized in that the amount of steam passing through the turbine is increased by increasing the amount of steam passing through the turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61135176A JPH07103808B2 (en) | 1986-06-11 | 1986-06-11 | Load back-up method when the system frequency drops sharply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61135176A JPH07103808B2 (en) | 1986-06-11 | 1986-06-11 | Load back-up method when the system frequency drops sharply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62291402A true JPS62291402A (en) | 1987-12-18 |
| JPH07103808B2 JPH07103808B2 (en) | 1995-11-08 |
Family
ID=15145610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61135176A Expired - Fee Related JPH07103808B2 (en) | 1986-06-11 | 1986-06-11 | Load back-up method when the system frequency drops sharply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07103808B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0291387A (en) * | 1988-09-29 | 1990-03-30 | Bunka Shutter Co Ltd | Shutter open and close device |
| JP2002030904A (en) * | 2000-05-09 | 2002-01-31 | Yyl:Kk | Power generating device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5723085A (en) * | 1980-07-15 | 1982-02-06 | Asahi Glass Co Ltd | Fitting method for ion exchange membrane |
-
1986
- 1986-06-11 JP JP61135176A patent/JPH07103808B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5723085A (en) * | 1980-07-15 | 1982-02-06 | Asahi Glass Co Ltd | Fitting method for ion exchange membrane |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0291387A (en) * | 1988-09-29 | 1990-03-30 | Bunka Shutter Co Ltd | Shutter open and close device |
| JP2002030904A (en) * | 2000-05-09 | 2002-01-31 | Yyl:Kk | Power generating device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07103808B2 (en) | 1995-11-08 |
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