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JP7537096B2 - How to replace a plant control system - Google Patents
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JP7537096B2 - How to replace a plant control system - Google Patents

How to replace a plant control system Download PDF

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JP7537096B2
JP7537096B2 JP2020028638A JP2020028638A JP7537096B2 JP 7537096 B2 JP7537096 B2 JP 7537096B2 JP 2020028638 A JP2020028638 A JP 2020028638A JP 2020028638 A JP2020028638 A JP 2020028638A JP 7537096 B2 JP7537096 B2 JP 7537096B2
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control device
pio
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JP2021135531A (en
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嗣 原田
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Chugoku Electric Power Co Inc
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Description

本発明は、プラント制御システムの取替方法に関する。 The present invention relates to a method for replacing a plant control system.

発電プラントの運転及び監視は、発電プラントに対する運転操作を行うBTG(ボイラ・タービン・発電機)装置及び、ユニット計算機等の制御装置とPIO(プロセス入出力)盤とを含むプラント制御システムにより行われている(例えば、特許文献1参照)。 The operation and monitoring of the power plant is carried out by a plant control system that includes a BTG (boiler-turbine-generator) unit that operates the power plant, a control device such as a unit computer, and a PIO (process input/output) panel (see, for example, Patent Document 1).

従来、このプラント制御システムの取り替えは以下のように行われている。まず、既設プラント制御システムの運転を停止し、既設プラント制御システムと現場機器との間に配置された既設PIO盤に接続されている外線ケーブルを解線し、既設プラント制御システムと既設PIO盤とを除去する。次いで、既設プラント制御システムと既設PIO盤とが設置されていた場所に新設プラント制御システムと新設PIO盤とを設置し、新設プラント制御システムと新設PIO盤とを接続するとともに、新設のPIO盤と外線ケーブルとを接続する。 Conventionally, this plant control system replacement has been carried out as follows. First, the operation of the existing plant control system is stopped, the external cable connected to the existing PIO panel placed between the existing plant control system and the field equipment is disconnected, and the existing plant control system and the existing PIO panel are removed. Next, a new plant control system and a new PIO panel are installed in the location where the existing plant control system and the existing PIO panel were installed, and the new plant control system and the new PIO panel are connected, and the new PIO panel is also connected to the external cable.

特開平3-209130号公報Japanese Patent Application Publication No. 3-209130

しかし、従来のプラント制御システムの取替方法によると、最初に、既設プラント制御システムの運転が停止され、各種試験が終了するまで、新設プラント制御システムを稼働することができない。このため、プラント制御システムの取替作業において、プラント制御システムの運転停止が長期間となり、このようなプラント制御システムの運転停止期間の短縮化が望まれている。
本発明は、発電所におけるプラント制御システムの運転停止期間の短縮化が可能なプラント制御システムの取替方法を提供することを目的とする。
However, according to the conventional method for replacing a plant control system, the operation of the existing plant control system must be stopped first, and the new plant control system cannot be operated until various tests are completed. Therefore, the replacement work of the plant control system requires a long period of shutdown of the plant control system, and it is desired to shorten such a shutdown period of the plant control system.
An object of the present invention is to provide a method for replacing a plant control system that can shorten the period during which the plant control system is shut down in a power plant.

上記課題を解決するために、本発明のプラント制御システムの取替方法は、前記新設制御装置を前記既設制御装置と異なる位置に設置し、前記新設制御装置から中継側PIO盤まで新設プレハブケーブルを敷設し、前記既設制御装置の運転を停止し、前記既設制御装置と前記中継側PIO盤との間の既設プレハブケーブルを取り外し、前記新設制御装置と前記中継側PIO盤との間の新設プレハブケーブルを接続し、前記新設制御装置の運転を開始する。 In order to solve the above problems, the plant control system replacement method of the present invention involves installing the new control device at a different location from the existing control device, laying a new prefabricated cable from the new control device to the relay side PIO panel, stopping operation of the existing control device, removing the existing prefabricated cable between the existing control device and the relay side PIO panel, connecting a new prefabricated cable between the new control device and the relay side PIO panel, and starting operation of the new control device.

前記新設プレハブケーブルを接続した後、ループ・ドライブ・シーケンス試験を行ってもよい。 After connecting the new prefabricated cable, a loop drive sequence test may be performed.

本発明によれば、発電所におけるプラント制御システムの運転停止期間の短縮化が可能なプラント制御システムの取替方法を提供することができる。 The present invention provides a method for replacing a plant control system that can shorten the shutdown period of a plant control system in a power plant.

本発明の実施形態のプラント制御システム1の取替方法を説明する図である。1 is a diagram illustrating a method for replacing the plant control system 1 according to an embodiment of the present invention.

図1は本発明の実施形態のプラント制御システム1の取替方法を説明する図である。プラント制御システム1は、中継側PIO盤2と、制御装置5と、を備える。 Figure 1 is a diagram illustrating a method for replacing a plant control system 1 according to an embodiment of the present invention. The plant control system 1 includes a relay side PIO panel 2 and a control device 5.

(中継側PIO盤2)
中継側PIO盤2は、発電プラントにおける、個々の現場機器3と外線ケーブル4で接続され、現場機器3より発電プラントの状態を受信して整理し、分岐統合する。
(Relay side PIO panel 2)
The relay side PIO panel 2 is connected to each of the field devices 3 in the power plant by an external cable 4, and receives and organizes the status of the power plant from the field devices 3, and branches and integrates the received information.

(現場機器3)
現場機器3は、例えば液位計、流量計、温度計、圧力計といったセンサ、流量制御弁や開閉弁等の各種の弁、ファンやモータのアクチュエータ等である。
(Field device 3)
The field devices 3 are, for example, sensors such as a liquid level gauge, a flow meter, a thermometer, and a pressure gauge, various valves such as a flow control valve and an on-off valve, and actuators for fans and motors.

(制御装置5)
制御装置5は、ユニット計算機等のCPUと制御側PIO盤とを備える。制御側PIO盤は、中継側PIO盤2とプレハブケーブル6を介して接続され、中継側PIO盤2より入力されて整理された発電プラントの状態を示す各種信号を受信し、CPUでの処理用に変換する。CPUは、制御側PIO盤から入力された信号に基づき、各種の演算を行う。
(Control device 5)
The control device 5 includes a CPU such as a unit computer and a control side PIO board. The control side PIO board is connected to the relay side PIO board 2 via a prefabricated cable 6, receives various signals indicating the status of the power plant that have been input and organized from the relay side PIO board 2, and converts them for processing by the CPU. The CPU performs various calculations based on the signals input from the control side PIO board.

(実施形態のプラント制御システム1の取替方法)
実施形態のプラント制御システム1の取替方法は以下の順序で行う。なお、制御装置5の交換は行うが中継側PIO盤2の取替は行わない。
図1(a)に示すように、取り替え前は、既設制御装置51と中継側PIO盤2とが既設プレハブケーブル61で接続され、中継側PIO盤2と現場機器3とが外線ケーブル4で接続され、既設制御装置51が運転中の状態である。
(Method of replacing the plant control system 1 according to the embodiment)
The replacement method of the plant control system 1 of the embodiment is performed in the following order: Note that the control device 5 is replaced, but the relay side PIO panel 2 is not replaced.
As shown in FIG. 1(a), before replacement, the existing control device 51 and the relay side PIO panel 2 are connected by an existing prefabricated cable 61, the relay side PIO panel 2 and the field equipment 3 are connected by an external cable 4, and the existing control device 51 is in operation.

(1)この既設制御装置51が運転中の状態において、図1(b)に示すように、新設制御装置52を既設制御装置51と異なる位置に設置する。
そして、新設制御装置52から、現時点で既設制御装置51と既設プレハブケーブル61により接続されている中継側PIO盤2まで、新設プレハブケーブル62を敷設する。
(1) While the existing control device 51 is in operation, a new control device 52 is installed in a position different from that of the existing control device 51, as shown in FIG. 1(b).
Then, a new prefabricated cable 62 is laid from the new control device 52 to the relay side PIO panel 2 which is currently connected to the existing control device 51 by the existing prefabricated cable 61 .

(2)既設制御装置51の運転を停止する。 (2) Stop operation of the existing control device 51.

(3)図1(c)に示すように、既設制御装置51と中継側PIO盤2との間の既設プレハブケーブル61と取り外す。
(4)新設制御装置52と中継側PIO盤2との間の新設プレハブケーブル62を接続する。
(3) As shown in FIG. 1( c ), the existing prefabricated cable 61 between the existing control device 51 and the relay side PIO panel 2 is removed.
(4) Connect the new prefabricated cable 62 between the new control device 52 and the relay side PIO board 2.

(5)本実施形態では、中継側PIO盤2に接続された外線ケーブル4は解線しない。PIO盤と既設制御装置間のループ試験は全数実施する。 (5) In this embodiment, the external cable 4 connected to the relay side PIO panel 2 is not disconnected. A loop test is performed on all the PIO panels and existing control devices.

ループ試験とは、現場機器3から所定の出力レベルの模擬信号(テスト出力レベル)を出力させ、現場機器3の動作や、現場機器3と、中継側PIO盤2と、新設制御装置52とが正しく結線されているかを確認するテストである。
シーケンス試験とは、それぞれの機器の単体試験終了後に総合的に連動して機能しているかどうかを確認する試験である。
A loop test is a test in which a simulated signal of a predetermined output level (test output level) is output from the field device 3 to check the operation of the field device 3 and whether the field device 3, the relay side PIO panel 2, and the newly installed control device 52 are correctly connected.
A sequence test is a test that checks whether the devices function together in a comprehensive manner after the individual tests of each device are completed.

しかし、新設制御装置52の処理速度向上による建設当初からのバグが表面化することのないように、ループ・ドライブ試験については全数する。
ループ試験として発信器、熱電対に対しては、現場からの模擬入力はせず、現場又は中継端子にてケーブル解線を行い、値が変化することを確認する。
現場スイッチに対しては、現場又は中継端子にてジャンパー・ケーブル解線を行い、信号ON/OFFを確認する。
他盤取合いについては、入力信号については他盤の端子台又は中継端子にてジャンパー・ケーブル解線を行い、値の変化又は信号ON/OFFを確認し、出力信号については保守ツールにて模擬出力を実施し他盤にて出力の確認、又はケーブルを解線し、導通確認にて信号ON/OFFを確認する。
However, to prevent bugs that may have existed since the time of construction from coming to light due to the increased processing speed of the newly installed control device 52, a loop drive test will be performed on all of the devices.
For the loop test, no simulated input is made from the site to the transmitter and thermocouple, but the cables are disconnected on-site or at the relay terminal to confirm that the values change.
For on-site switches, disconnect the jumper cable at the site or at the relay terminal and check that the signal is ON/OFF.
When connecting to other boards, for input signals, disconnect the jumper cable at the terminal block or relay terminal of the other board and check the change in value or the signal ON/OFF. For output signals, perform a simulated output using a maintenance tool and check the output on the other board, or disconnect the cable and check the continuity to confirm the signal ON/OFF.

ただし、シーケンス試験については、工場側での試験を最大限実施することでバグを洗い出し、現場では非定常操作である高圧ヒータ片系列・水張・復帰マスタについて実施する。
シーケンス試験については、高圧ヒータ片系列・水張・復帰マスタに対して、工場側で全ての項目についてシミュレーションを用い実施し、現場では代表マスタとして非定常操作である高圧ヒータ片系列・水張・復帰マスタについて実施する。
However, sequence testing will be carried out as much as possible at the factory to identify bugs, and testing will be carried out on-site on the high-pressure heater single series, water filling, and reset master, which are non-routine operations.
For sequence testing, the factory uses simulation for all items for the high-pressure heater single line, water filling, and reset master, and on-site the test is performed on the high-pressure heater single line, water filling, and reset master, which is a non-steady operation, as the representative master.

(6)ループ・ドライブ・シーケンス試験終了後、新設制御装置の動作を開始する。 (6) After the loop drive sequence test is completed, start operation of the newly installed control device.

(7)そして、これらの試験の実施中又は、後の適切な時間に、既設制御装置51及び既設プレハブケーブル61を撤去する。 (7) Then, during or at an appropriate time after these tests, remove the existing control device 51 and the existing prefabricated cable 61.

(比較形態)
次に、本実施形態との比較形態のプラント制御システム1の取替方法について説明する。本実施形態では中継側PIO盤2の交換を行わなかったが、比較形態のプラント制御システム1の取替方法は、中継側PIO盤の交換も行う。比較形態のプラント制御システム1の取替方法は、以下の順序で行われる。
(Comparative form)
Next, a method for replacing the plant control system 1 in a comparative embodiment to the present embodiment will be described. In the present embodiment, the relay side PIO panel 2 is not replaced, but in the method for replacing the plant control system 1 in the comparative embodiment, the relay side PIO panel is also replaced. The replacement method for the plant control system 1 in the comparative embodiment is performed in the following order.

まず、取替前の状態は、本実施形態と同様で、取り替え前は、既設制御装置51と既設中継側PIO盤2とが既設プレハブケーブル61で接続され、既設中継側PIO盤2と現場機器3とが外線ケーブル4で接続され、既設制御装置51が運転中である。 First, the state before replacement is the same as in this embodiment. Before replacement, the existing control device 51 and the existing relay side PIO panel 2 are connected by the existing prefabricated cable 61, the existing relay side PIO panel 2 and the field equipment 3 are connected by the external cable 4, and the existing control device 51 is in operation.

(A)まず、既設制御装置51の運転を停止する。 (A) First, stop operation of the existing control device 51.

(B)既設制御装置51と既設中継側PIO盤2との間の既設プレハブケーブル61と、既設中継側PIO盤2と現場機器3との間の外線ケーブル4を取り外す。 (B) Remove the existing prefabricated cable 61 between the existing control device 51 and the existing relay side PIO panel 2, and the external cable 4 between the existing relay side PIO panel 2 and the field equipment 3.

(C)既設制御装置51と、既設中継側PIO盤2とを撤去する。 (C) Remove the existing control device 51 and the existing relay side PIO panel 2.

(D)新設制御装置52と、新設中継側PIO盤2とを、既設制御装置51と既設中継側PIO盤2とが設置されていた位置に設置する。 (D) The new control device 52 and the new relay side PIO panel 2 are installed at the location where the existing control device 51 and the existing relay side PIO panel 2 were installed.

(E)新設制御装置52と新設中継側PIO盤2との間に新設プレハブケーブル62を敷設して接続し、さらに、新設中継側PIO盤2と現場機器3との間の外線ケーブル4とを接続する。 (E) Lay and connect a new prefabricated cable 62 between the new control device 52 and the new relay side PIO panel 2, and further connect an external cable 4 between the new relay side PIO panel 2 and the field device 3.

(F)ループ・ドライブ・シーケンス試験を行う。
(G)ループ・ドライブ・シーケンス試験終了後、新設制御装置の動作を開始する。
(F) Perform loop drive sequence test.
(G) After the loop drive sequence test is completed, start operation of the newly installed control device.

以上、比較形態では、プラント制御システム1を停止した後、既設制御装置51を除去して、その場所に新設制御装置52を設置する。
しかし、実施形態では、既設制御装置51の設置場所と異なる場所に、予め新設制御装置52を設置し、新設プレハブケーブル62を中継側PIO盤2まで設置した後でプラント制御システム1を停止する。
As described above, in the comparative example, after the plant control system 1 is stopped, the existing control device 51 is removed and the new control device 52 is installed in its place.
However, in the embodiment, the new control device 52 is installed in advance at a location different from that of the existing control device 51, and the new prefabricated cable 62 is installed up to the relay side PIO panel 2, and then the plant control system 1 is stopped.

すなわち、比較形態のプラント制御システム1の取替方法は、取替動作の開始直後の(A)の時点でプラント制御システム1が停止する。そして、新設制御装置52及び新設PIO盤2のループ・ドライブ・シーケンス試験が完了した(G)の時点までプラント制御システム1は作動しない。 That is, in the comparative method of replacing the plant control system 1, the plant control system 1 stops at the point (A) immediately after the start of the replacement operation. Then, the plant control system 1 does not operate until the point (G) when the loop drive sequence test of the new control device 52 and the new PIO panel 2 is completed.

一方、本実施形態のプラント制御システム1の取替方法は、取替開始の(1)の時点でプラント制御システム1は停止させず、新設制御装置52を設置後の(2)の時点でプラント制御システム1を停止させる。そして、ループ・ドライブ・シーケンス試験を行わない場合は(4)、行う場合は(6)において、新設制御装置52の動作を開始することができる。 On the other hand, in the method of replacing the plant control system 1 in this embodiment, the plant control system 1 is not stopped at the start of the replacement (1), but is stopped at the point (2) after the new control device 52 is installed. Then, if a loop drive sequence test is not performed, the operation of the new control device 52 can be started at (4), or if it is performed, at (6).

すなわち、実施形態では、比較形態と比べて、プラント制御システム1の停止時間は、少なくとも(C)(D)(E)、ループ・ドライブ・シーケンス試験を行わない場合は(F)の分も、短縮することができる。
したがって、実施形態によるとプラント制御システム1を長期間にわたって停止させる必要ない。
That is, in the embodiment, compared to the comparative example, the downtime of the plant control system 1 can be shortened by at least (C), (D), and (E), and also by (F) if the loop drive sequence test is not performed.
Therefore, according to the embodiment, it is not necessary to shut down the plant control system 1 for a long period of time.

特に、現場機器3は多数設けられており、現場機器3から中継側PIO盤2へ接続される外線ケーブル4の数も膨大である。このため、現場機器3からの外線ケーブル4を中継側PIO盤2に対して着脱する場合、相当な時間がかかる。
しかし実施形態では、外線ケーブル4を外さないので、着脱時間が不要である。
さらに、ループ試験といった外線ケーブル4の接続の確認作業を必ずしも行う必要がない。
In particular, a large number of field devices 3 are provided, and the number of external cables 4 connected from the field devices 3 to the relay side PIO board 2 is also enormous. For this reason, it takes a considerable amount of time to connect and disconnect the external cables 4 from the field devices 3 to the relay side PIO board 2.
However, in this embodiment, the external cable 4 is not removed, so no attachment and detachment time is required.
Furthermore, it is not always necessary to carry out a loop test or other check on the connection of the outside cable 4 .

以上、本実施形態によると、プラント制御システム1の停止時間の、大幅な時間短縮が可能である。 As described above, according to this embodiment, it is possible to significantly reduce the downtime of the plant control system 1.

1 プラント制御システム
2 PIO盤
3 現場機器
4 外線ケーブル
5 制御装置
51 既設制御装置
52 新設制御装置
6 プレハブケーブル
61 既設プレハブケーブル
62 新設プレハブケーブル
REFERENCE SIGNS LIST 1 Plant control system 2 PIO panel 3 Field equipment 4 External cable 5 Control device 51 Existing control device 52 New control device 6 Prefabricated cable 61 Existing prefabricated cable 62 New prefabricated cable

Claims (1)

プラント制御システムの取替方法であって、
新設制御装置を既設制御装置と異なる位置に設置し、
前記新設制御装置から中継側PIO盤まで新設プレハブケーブルを敷設し、
前記既設制御装置の運転を停止し、
前記既設制御装置と前記中継側PIO盤との間の既設プレハブケーブルを取り外し、
前記新設制御装置と前記中継側PIO盤との間の新設プレハブケーブルを接続し、
発信器、熱電対に対して、現場からの模擬入力はせず、現場又は中継端子にてケーブル解線を行い、値が変化することを確認するループ試験と、
現場スイッチに対しては、前記現場又は前記中継端子にてジャンパー・ケーブル解線を行い、信号ON/OFFを確認し、他盤取合いについては、入力信号については他盤の端子台又は中継端子にてジャンパー・ケーブル解線を行い、値の変化又は信号ON/OFFを確認し、出力信号については保守ツールにて模擬出力を実施し他盤にて出力の確認、又はケーブルを解線し、導通確認にて信号ON/OFFを確認し、工場側での試験を最大限実施することでバグを洗い出し、現場では非定常操作である高圧ヒータ片系列・水張・復帰マスタについて実施するドライブ試験と、
前記高圧ヒータ片系列・水張・復帰マスタに対して、前記工場側で全ての項目についてシミュレーションを用い実施し、前記現場では代表マスタとして非定常操作である前記高圧ヒータ片系列・水張・復帰マスタについて実施するシーケンス試験と、
を含むループ・ドライブ・シーケンス試験を行い、
前記新設制御装置の運転を開始する、
プラント制御システムの取替方法。
1. A method for replacing a plant control system, comprising:
The new control device is installed in a different location from the existing control device.
Lay a new prefabricated cable from the new control device to the relay side PIO panel,
Stopping the operation of the existing control device,
Remove the existing prefabricated cable between the existing control device and the relay side PIO board,
Connecting a new prefabricated cable between the new control device and the relay side PIO board;
A loop test is performed to confirm that the values change without applying any simulated input from the field to the transmitter and thermocouple, and by disconnecting the cables at the field or relay terminal.
For on-site switches, a jumper cable is disconnected at said site or said relay terminal to check the signal ON/OFF, for connections to other panels, a jumper cable is disconnected at the terminal block or relay terminal of the other panel for input signals to check the value change or the signal ON/OFF, for output signals, a simulated output is performed using a maintenance tool to check the output on the other panel, or the cable is disconnected and the signal ON/OFF is checked by checking the continuity, and bugs are identified by conducting maximum testing at the factory, and drive tests are conducted on the high-pressure heater single series, water filling, and reset master, which are non-regular operations at the site.
A sequence test is performed on the high-pressure heater single line, water filling, and reset master by simulating all items at the factory side, and a sequence test is performed on the high-pressure heater single line, water filling, and reset master, which is a non-stationary operation, as a representative master at the site;
A loop drive sequence test including
Starting operation of the newly installed control device.
How to replace a plant control system.
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