JPH01203997A - Power unit for nuclear reactor internal pump - Google Patents
Power unit for nuclear reactor internal pumpInfo
- Publication number
- JPH01203997A JPH01203997A JP63027669A JP2766988A JPH01203997A JP H01203997 A JPH01203997 A JP H01203997A JP 63027669 A JP63027669 A JP 63027669A JP 2766988 A JP2766988 A JP 2766988A JP H01203997 A JPH01203997 A JP H01203997A
- Authority
- JP
- Japan
- Prior art keywords
- breakers
- internal pump
- vvvf
- vary
- voltage
- 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
- 239000002826 coolant Substances 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000007257 malfunction Effects 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003758 nuclear fuel Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Inverter Devices (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的］ −
（産業上の利用分野）
本発明は、沸騰水型原子炉の炉心内の冷却材を循環させ
るインターナルポンプ用の電源装置に関するものである
。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] - (Industrial Application Field) The present invention relates to a power supply device for an internal pump that circulates coolant in the core of a boiling water nuclear reactor.
（従来の技術）
沸騰水型原子力発電所では、原子炉内の冷却材を強制循
環させることにより、炉心部の熱除去及び蒸気発生を行
い、かつ冷却材の流量を変化させることによって炉心の
核反応度を調整して原子炉の出力を制御している。この
冷却材を強制的に循環させる手段として、炉心を収納し
た原子炉圧力容器内にポンプとモータを一体に結合した
インターナルポンプを１０乃至１２基設置したインター
ナルポンプ方式の循環装置がある。この従来の循環装置
の電源装置の構成を第５図にて説明する。入力側電路１
から高圧母線２に供給された電源より、電力を各インタ
ーナルポンプ毎に設けたしゃ断器３ａ、３ｂ・・・によ
り分岐し、夫々入力変圧器４ａ、４ｂ・・・にて降圧し
て静止型可変電圧可変周波数変換装置（以下ＶＶＶＦと
略称する）５ａ、５ ｂ−＝−に供給する。このＶＶＶ
Ｆ５ａ、５ｂ・・・によって変換した交流電力を次に出
力変圧器６ａ、６ｂ・・・で昇圧して、インターナルポ
ンプモータ７ａ、７ｂ・・・に供給して駆動する構成と
なっている。この構成において、原子炉出力を制御する
べくインターナルポンプモータ７ａ、７ｂ・・・に加え
る可変電圧、可変周波数電力は、ＶＶＶＦ５ａ、５ｂ・
・・を制御することによって得ることができる。しかし
ながらＶＶＶＦ５ａ、５ｂ・・・は半導体による電子回
路のため応答性が極めて速く、かつインターナルポンプ
についても構造的に慣性が小さいことから、運転制御に
際しては制御性が良好である反面、供給電源の一時的な
喪失（以下瞬停と略称する）に際しては、インターナル
ポンプの回転も一時的に降下し、このため炉心流量が急
激に低下する現象を呈する。またＶＶＶＦ５ａ、５ｂ・
・・は動作中に高調波が発生するという特性を有してい
る。(Prior art) In a boiling water nuclear power plant, heat is removed from the reactor core and steam is generated by forced circulation of coolant within the reactor, and the core of the reactor is removed by changing the flow rate of the coolant. The output of the reactor is controlled by adjusting the reactivity. As a means for forcibly circulating this coolant, there is an internal pump type circulation system in which 10 to 12 internal pumps each having a pump and a motor integrally connected are installed in a reactor pressure vessel housing a reactor core. The configuration of the power supply device of this conventional circulation device will be explained with reference to FIG. Input side circuit 1
From the power source supplied to the high-voltage bus 2 from The voltage is supplied to variable voltage variable frequency converters (hereinafter abbreviated as VVVF) 5a, 5b-=-. This VVV
The AC power converted by F5a, 5b... is then boosted by output transformers 6a, 6b..., and is supplied to and driven by internal pump motors 7a, 7b.... In this configuration, the variable voltage and variable frequency power applied to the internal pump motors 7a, 7b... to control the reactor output are VVVFs 5a, 5b...
can be obtained by controlling... However, VVVF5a, 5b... have extremely fast response due to their semiconductor electronic circuits, and their internal pumps have low structural inertia. In the event of a temporary loss (hereinafter abbreviated as instantaneous power failure), the rotation of the internal pump also temporarily drops, resulting in a phenomenon in which the core flow rate rapidly decreases. Also VVVF5a, 5b・
... has the characteristic that harmonics are generated during operation.
（発明が解決しようとする課題）
しかしながら瞬停に際して、インターナルポンプの回転
が一時的に降下し炉心流量が急激に低下すると、炉心に
おける熱除去能力を悪化させ、核燃料の熱的余裕を失う
可能性があり、最悪の場合炉心を損傷することとなる。(Problem to be solved by the invention) However, in the event of a momentary power outage, if the rotation of the internal pump temporarily drops and the core flow rate drops sharply, the heat removal ability in the core may deteriorate and the thermal margin of the nuclear fuel may be lost. In the worst case scenario, this could damage the reactor core.
またＶＶＶ Ｆ５ａ、５ｂ・・・から発生した高調波成
分はノイズとして、入力変圧器４ａ、４ｂ・・・及びし
ゃ断器３ａ、３ｂ・・・を潤性して高圧母線２を経て入
力側電路１に至り、さらに所内電源系統に伝播して行く
ので、所内の多くの電気設備にこの高調波成分によるノ
イズが加わることとなり、各電気機器の誤動作や不動作
を惹き起し、原子カプラントの運転に悪影響を及ぼすお
それがあった。In addition, the harmonic components generated from the VVV F5a, 5b, etc. act as noise and lubricate the input transformers 4a, 4b,... and the circuit breakers 3a, 3b, etc., and pass through the high voltage bus 2 to the input side electric line 1. As the noise is further propagated to the station's power supply system, noise due to this harmonic component is added to many electrical equipment within the station, causing malfunctions or non-operations of various electrical equipment, and disrupting the operation of the nuclear coupler. There was a risk of adverse effects.
本発明の目的は、所内電源系統とＶＶＶＦの間にＭＧセ
ットを挿置して電気的に絶縁を施し、ＶＶＶＦの諸特性
を失することなく、かつ瞬停に対しても変動しない電力
を供給し、併せてＶＶＶＦから発する高調波成分が所内
電源系統へ流入することを防止して、原子炉の安定した
運転と、所内電気設備の健全性を保つことのできる原子
炉インターナルポンプ用電源装置を提供することにある
。The purpose of the present invention is to provide electrical insulation by inserting an MG set between the station power supply system and the VVVF, and to supply power that does not change even in the event of a momentary power outage without losing the various characteristics of the VVVF. At the same time, this is a power supply system for reactor internal pumps that prevents harmonic components emitted from the VVVF from flowing into the on-site power supply system, thereby maintaining stable operation of the reactor and the integrity of on-site electrical equipment. Our goal is to provide the following.
（課題を解決するための手段）
インターナルポンプモータの駆動電源で、高調波Ω発生
源であるＶＶＶＦの上流側に、慣性を有すると共に所内
電源系統とＶＶＶＦを電気的に絶縁分離するＭＧセット
を介設する。(Means for solving the problem) Install an MG set that has inertia and electrically isolates the in-house power supply system and VVVF on the upstream side of the VVVF, which is the source of harmonic Ω generation in the internal pump motor drive power supply. intervene.
（作用）
所内電源系統で発生した瞬停に対して、ＭＧセットをそ
の運転により保有している回転の慣性力を放出して回転
数を変動させず、ＶＶＶＦの電源として慣性を持つので
、ＶＶＶＦに加わる電圧、周波数に変動がなく、インタ
ーナルポンプの回転低下は起きない。このため炉心の健
全性が確保できる。またＭＧセットを電動機と発電機は
機械的な結合となっていることから電気的に絶縁されて
いるので、ＶＶＶＦより発生した高調波は所内電源系統
に潤性伝播しないので、所内電気設備の作動に悪影響を
与えない。(Function) In response to a momentary power failure that occurs in the on-site power supply system, the MG set releases the rotational inertia it possesses through its operation, and the rotational speed does not fluctuate. There are no fluctuations in the voltage or frequency applied to the internal pump, and no reduction in internal pump rotation occurs. Therefore, the integrity of the reactor core can be ensured. In addition, since the motor and generator of the MG set are mechanically connected, they are electrically insulated, so the harmonics generated by the VVVF do not propagate to the station power supply system, which prevents the operation of the station electrical equipment. does not have a negative effect on
（実施例） 本発明の実施例を構成図を参照して説明する。(Example) Embodiments of the present invention will be described with reference to configuration diagrams.
第１図は第１の実施例を示し、入力側電路１より給電さ
れた高圧母線２に、各インターナルポンプ毎に設けたし
ゃ断器３ａ、３ｂ・・・を分岐接続し、夫々に電動機１
０ａ、１０ｂ・・・と、これと機械的に結合して駆動さ
れる発電機１１ａ、ｌｌｂ・・・よりなるＭＧセットを
接続する。次にしゃ断器１２ａ、１２ｂ・・・、降圧用
の入力変圧器４ａ、４ｂ・・・と、ＶＶＶＦ５ａ、５ｂ
・・・及び昇圧用の出力変圧器６ａ、６ｂ・・・を介し
てインターナルポンプモータ７ａ、７ｂ・・・を接続し
て構成する。この構成によると、原子炉運転中に入力側
電路１及び高圧母線２の所内電源系統において瞬停が発
生すると、−時的に電圧が低下して電動機１０ａ、１０
ｂ・・・に加わる電圧も低下するが、ＭＧセットを回転
数はその電動機１０ａ、１０ｂ・・・及び発電機１１ａ
、ｌｌｂ・・・が回転により保有する慣性力により変動
しない。したがって発電機１１ａ、１１ｂ・・・の出力
にも変動は生じないので、この下流に設けてあり発電機
１１ａ、ｌｌｂ・・・を電源とするＶＶＶＦ５ａ、５ｂ
・・・にも同等影響がなく、インターナルポンプモータ
７ａ、７ｂ・・・の回転数が一時的に低下することがな
いので、炉心流量の変化もなく、炉心流量の急激な減少
時に伴う炉心損傷が防止できる。 またＭＧセットを電
動機１０ａ、１０ ｂ−・・と発電機１１ａ、ｌｌｂ・
・・どの間を機械的に結合していて、このため電気的に
絶縁隔離されているので、ＶＶＶＦ５ａ、５ｂ・・・で
発生した高調波成分は、発電機１１ａ、ｌｌｂ・・・か
ら電動機１０ａ、１０ｂ・・・へ伝播されないので、高
圧母線２や入力側電路１の所内電源系統への流入がなく
、所内の他の電気設備を誤動作、不動作させる心配がな
い。FIG. 1 shows a first embodiment, in which circuit breakers 3a, 3b, .
0a, 10b, . . . and a generator 11a, llb, . . . that are mechanically coupled and driven. Next, the circuit breakers 12a, 12b..., the step-down input transformers 4a, 4b..., and the VVVFs 5a, 5b.
. . and internal pump motors 7a, 7b, . . . are connected via step-up output transformers 6a, 6b, . According to this configuration, when an instantaneous power outage occurs in the in-house power supply system of the input side electric circuit 1 and the high voltage bus 2 during reactor operation, the voltage temporarily decreases and the electric motors 10a, 10
The voltage applied to b... also decreases, but the rotation speed of the MG set is lower than that of the motors 10a, 10b... and generator 11a.
, llb... do not fluctuate due to the inertial force possessed by rotation. Therefore, since no fluctuation occurs in the output of the generators 11a, llb...
There is no similar effect on the internal pump motors 7a, 7b, etc., and the rotational speed of the internal pump motors 7a, 7b, etc. does not temporarily decrease, so there is no change in the core flow rate, and the core flow rate does not change due to a sudden decrease in the core flow rate. Damage can be prevented. In addition, the MG set includes electric motors 10a, 10b-... and generators 11a, llb-...
Since they are mechanically coupled and electrically isolated, the harmonic components generated in VVVFs 5a, 5b, etc. are transmitted from the generators 11a, llb... to the electric motor 10a. , 10b, . . . , the high-voltage bus 2 and the input-side electric circuit 1 do not flow into the station power supply system, and there is no fear that other electrical equipment in the station will malfunction or malfunction.
第２図は第２の実施例で、電源側を２系統に集約したも
ので、ＶＶＶＦ以下を５ａ、５ｂ・・・と５ｃ、５ｄ・
・・の２群に分割し、夫々にしゃ断器３ａと３ｂ、ＭＧ
セットを電動機１０ａと１０ｂ、発電機１１ａとｌｌｂ
さらにしゃ断器１２ａと１２ｂ、入力変圧器４ａと４ｂ
を設けていて、作用と効果は第１の実施例と同様である
がＭＧセットを含む電源側機器の点数が少なく、保守を
容易としている。Figure 2 shows the second embodiment, in which the power supply side is integrated into two systems, with VVVF and below being 5a, 5b... and 5c, 5d...
Divided into two groups, each with circuit breaker 3a and 3b, MG
The set includes electric motors 10a and 10b, generators 11a and llb
Furthermore, circuit breakers 12a and 12b, input transformers 4a and 4b
The operation and effect are similar to those of the first embodiment, but the number of power supply side devices including the MG set is small, making maintenance easier.
第３図は第３の実施例で、電源側機器のしゃ断器３と１
２、及び電動機１０、発電機１１と入力変圧器４を１系
統に集約し、ＭＧセットを単機となるためその保有する
慣性力を大きくして電源変動に対する安定度を良好にし
たものである。Figure 3 shows the third embodiment, in which circuit breakers 3 and 1 of the power supply side equipment
2, electric motor 10, generator 11, and input transformer 4 are integrated into one system, and since the MG set is a single unit, its inertia is increased and stability against power fluctuations is improved.
第４図は第４の実施例を示し、第３の実施例のＭＧセッ
トを、はずみ車１３を追加装備すると共に発電機１１の
出力電圧をＶＶＶＦ５ａ、５ｂ・・・に見合った低電圧
に選定して、入力変圧器４を省いたもので、電源の慣性
を更に大として瞬停時における電源変動を極めて少なく
し、安定度を向上させ、かつ入力変圧器を不要にした。FIG. 4 shows a fourth embodiment, in which the MG set of the third embodiment is additionally equipped with a flywheel 13, and the output voltage of the generator 11 is selected to be a low voltage commensurate with the VVVFs 5a, 5b, etc. In this case, the input transformer 4 is omitted, and the inertia of the power supply is further increased to extremely reduce power fluctuations during instantaneous power outages, improving stability and eliminating the need for an input transformer.
［発明の効果］
以上本発明によれば、夫々の構成上慣性の小さいインタ
ーナルポンプやＶＶＶＦを採用した原子炉において、そ
の電源に慣性を付与したので、所内電源系統の瞬停に対
して炉心流量の変動が抑制され、炉心損傷を防止できる
。更に所内電源系統とＶＶＶＦを電気的に隔離したので
、ＶＶＶＦより発生する高調波が所内各所の電気設備に
伝播することが防止され、安定したプラントの運転が行
なえて信頼性が向上する効果がある。[Effects of the Invention] According to the present invention, inertia is imparted to the power supply in a nuclear reactor that employs an internal pump or VVVF, each of which has a small inertia due to its configuration, so that the reactor core is protected against momentary power failures in the on-site power supply system. Fluctuations in flow rate are suppressed and core damage can be prevented. Furthermore, since the in-house power supply system and the VVVF are electrically isolated, harmonics generated by the VVVF are prevented from propagating to electrical equipment in various parts of the in-house facility, resulting in stable plant operation and improved reliability. .
第１図は本発明の第１の実施例を示す原子炉インターナ
ルポンプ用電源装置の概略構成図、第２図は第２の実施
例の概略構成図、第３図は第３の実施例の概略構成図、
第４図は第４の実施例を示す概略構成図、第５図は従来
の原子炉インターナルポンプモータ用電源装置の概略構
成図である。
１・・・入力側電路 ２・・・高圧母線４．４ａ、４
ｂ・・・入力変圧器
５ａ、５ｂ、５ｃ、５ｄ・−ＶＶＶＦ
７ａ、７ｂ、７ｃ、７ｄ・・・インターナルポンプモー
タ
１０．１０ａ、１０ ｂ −・・電動機１１、ｌｌａ、
１ｌｂ−・・発電機
１３・・・はずみ車FIG. 1 is a schematic diagram of a power supply device for a nuclear reactor internal pump showing a first embodiment of the present invention, FIG. 2 is a schematic diagram of a second embodiment, and FIG. 3 is a diagram of a third embodiment. A schematic configuration diagram of
FIG. 4 is a schematic configuration diagram showing a fourth embodiment, and FIG. 5 is a schematic configuration diagram of a conventional power supply device for a nuclear reactor internal pump motor. 1... Input side electric circuit 2... High voltage bus bar 4.4a, 4
b...Input transformer 5a, 5b, 5c, 5d...-VVVF 7a, 7b, 7c, 7d...Internal pump motor 10.10a, 10b...Electric motor 11, lla,
1lb-... Generator 13... Flywheel
Claims (1)
ポンプのモータ駆動用として所内電源より電力を供給さ
れる可変電圧、周波数変換装置において、電圧と周波数
の変換に静止型可変電圧可変周波数変換装置を設けると
共にこの入力側で電源との間に電気的に隔離されかつ慣
性を有するＭＧセットを介設したことを特徴とする原子
炉インターナルポンプ用電源装置。A stationary variable voltage variable frequency converter is used to convert voltage and frequency in a variable voltage and frequency converter that is supplied with power from an on-site power source to drive the motor of an internal pump for coolant circulation installed in a reactor pressure vessel. What is claimed is: 1. A power supply device for a nuclear reactor internal pump, characterized in that an MG set electrically isolated from the power source and having inertia is interposed on the input side of the MG set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63027669A JP2677581B2 (en) | 1988-02-10 | 1988-02-10 | Power supply unit for reactor internal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63027669A JP2677581B2 (en) | 1988-02-10 | 1988-02-10 | Power supply unit for reactor internal pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01203997A true JPH01203997A (en) | 1989-08-16 |
| JP2677581B2 JP2677581B2 (en) | 1997-11-17 |
Family
ID=12227356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63027669A Expired - Lifetime JP2677581B2 (en) | 1988-02-10 | 1988-02-10 | Power supply unit for reactor internal pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2677581B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7692333B2 (en) | 2005-04-11 | 2010-04-06 | Hitachi-Ge Nuclear Energy, Ltd. | Adjustable speed drive system for primary loop recirculation pump |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60171488A (en) * | 1984-02-17 | 1985-09-04 | 株式会社日立製作所 | Power supply device for driving internal pump |
-
1988
- 1988-02-10 JP JP63027669A patent/JP2677581B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60171488A (en) * | 1984-02-17 | 1985-09-04 | 株式会社日立製作所 | Power supply device for driving internal pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7692333B2 (en) | 2005-04-11 | 2010-04-06 | Hitachi-Ge Nuclear Energy, Ltd. | Adjustable speed drive system for primary loop recirculation pump |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2677581B2 (en) | 1997-11-17 |
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