JPS5989579A - Output power controller for inverter - Google Patents
Output power controller for inverterInfo
- Publication number
- JPS5989579A JPS5989579A JP57197587A JP19758782A JPS5989579A JP S5989579 A JPS5989579 A JP S5989579A JP 57197587 A JP57197587 A JP 57197587A JP 19758782 A JP19758782 A JP 19758782A JP S5989579 A JPS5989579 A JP S5989579A
- Authority
- JP
- Japan
- Prior art keywords
- power
- inverter
- output
- load
- detector
- 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
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は配電系統と連系運転を行うインバータの出力電
力制御装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an output power control device for an inverter that performs interconnected operation with a power distribution system.
インバータを配電系統と連系運転を行い、配電系統とイ
ンバータから同一負荷に電力を供給するシステムにおい
て、インバータの直流側電源が太陽電池等の自然エネル
ギーを利用したものである場合、太陽電池等の発生電力
は日射量等により変化する。従って、直流電圧を一定に
保つためには、直流電力に応じてインバータの出力電圧
位相を変えインバータの出力電力を変化させる必要があ
る。In a system where the inverter is connected to the power distribution system and power is supplied to the same load from the power distribution system and the inverter, if the DC side power source of the inverter uses natural energy such as solar cells, The generated power varies depending on the amount of solar radiation, etc. Therefore, in order to keep the DC voltage constant, it is necessary to change the output voltage phase of the inverter in accordance with the DC power to change the output power of the inverter.
しかしこのようにすると、直流電源の発生電力が負荷電
力より大きい場合には配電系統に流出するという問題が
あった。However, in this case, there is a problem in that when the power generated by the DC power supply is larger than the load power, the power flows into the power distribution system.
本発明の目的は、配電系統と、連系運転を行うインバー
タにおいて、配電系統へ電力が流出しないようにインバ
ータの出力′電力を自動調整する装置を提供するところ
にある。An object of the present invention is to provide a device that automatically adjusts the output power of an inverter in a power distribution system and an inverter that performs grid-connected operation so that power does not flow into the power distribution system.
本発明はインバータ出力電力と負荷電力の両者を検出比
較して、後者が太さいときはその検出値を基準としてイ
ンバータを制御するものである。The present invention detects and compares both the inverter output power and the load power, and when the latter is larger, the inverter is controlled using the detected value as a reference.
図は、本発明の一実施例を示すもので６９、太陽電池１
の出力はインバータ３に入力される。インバータ３の人
力にはコンデンサ２が接続されている。インバータ３の
出力は波形成形用フィルター４および開閉器５を通して
配電系統７に接続され負荷６に電力を供給している。イ
ンバータ３を配電系統７と同期運転を行うためにインバ
ータ３の出力電圧および配電系統７の電圧をそれぞれ電
圧変成器３０．３２を介して成分分離回路９に取込み電
圧制御成分と周波数制御成分に分離し、各各を電圧制御
回路１５と周波数制御回路１６に入力し、インバータ３
を制御して配電系統７と同期運転を行っている。The figure shows one embodiment of the present invention.69 Solar cell 1
The output of is input to the inverter 3. A capacitor 2 is connected to the human power of the inverter 3. The output of the inverter 3 is connected to a power distribution system 7 through a waveform shaping filter 4 and a switch 5 to supply power to a load 6. In order to operate the inverter 3 in synchronization with the power distribution system 7, the output voltage of the inverter 3 and the voltage of the power distribution system 7 are respectively input to the component separation circuit 9 via voltage transformers 30 and 32 and separated into voltage control components and frequency control components. and input each to the voltage control circuit 15 and frequency control circuit 16, and inverter 3.
is controlled to perform synchronized operation with the power distribution system 7.
無効電力検出器１１は、変流器３４、電圧変成器３６を
介して電流、電圧を入力し無効電力を算出する。その算
出値は無効電力設定回路１３の出力値と比較される。選
択スイッチ１４により無効電力制御および出力電圧制御
のどちらかが選択できる、
一方インバータ３の有効電力は有効電力検出回路１０に
よシ検出される。比較器１８は有効電力検出回路１０の
出力ＰＩと負荷６の電力を変流器３８、電力変成器３９
を介して検出する有効電力検出回路の出力ＰＬを比較し
選択スイッチ１７を制御し、Ｐ！が小さい場合には、有
効電力設定回路１２の出力値をインバータ有効電力の基
準値として選択し、ＰＬが小さい時はＰＬをインバータ
有効電力の基準値として選択する。通常の運転において
は、インバータ３の出力電力ＰＩは負荷６の電力Ｐｔ、
よシ小さいため、有効電力設定値１２を基準値として定
電力制御を行っている。この場合負荷６の消費電力はイ
ンバータ３の出力′電力よシ大きいため電力系統への電
力の流出は無い。The reactive power detector 11 receives current and voltage through a current transformer 34 and a voltage transformer 36, and calculates reactive power. The calculated value is compared with the output value of the reactive power setting circuit 13. Either reactive power control or output voltage control can be selected by the selection switch 14. On the other hand, the active power of the inverter 3 is detected by the active power detection circuit 10. A comparator 18 converts the output PI of the active power detection circuit 10 and the power of the load 6 into a current transformer 38 and a power transformer 39.
The selection switch 17 is controlled by comparing the output PL of the active power detection circuit detected via P! When PL is small, the output value of the active power setting circuit 12 is selected as the reference value of the inverter active power, and when PL is small, PL is selected as the reference value of the inverter active power. In normal operation, the output power PI of the inverter 3 is the power Pt of the load 6,
Since the power is relatively small, constant power control is performed using the active power set value 12 as a reference value. In this case, since the power consumption of the load 6 is larger than the output power of the inverter 3, no power flows out to the power grid.
次に負荷６が急変した場合、あるいはインバータ３の出
力電力の設定値が大きくなった場合には負荷６の消費電
力ＰＬが、インバータ３の出力電力Ｐ！よシ小さくなる
。この場合には比較器１８の信号によシ選択スイッチ１
７は、インバータ３の出力電力設定値として有効電力設
定値１２から負荷の消費電力ＰＬに選択を変更する。従
って、インバータ３の出力電力は負荷６の消費電力と同
じ値となシ、電力系統への電力の流出は防止することが
でき、しかもインバータ３を停止する必要もない。また
負荷６が重くなっていく場合にも、インバータ３の出力
は負荷６の消費眠力分を出力することができ、さらに負
荷６が重くなり、インバータ３の当初の定電力制御値よ
り重くなった場合には、有効電力設定値１２が基準出力
となシ、定電力運転を行う。Next, when the load 6 suddenly changes, or when the set value of the output power of the inverter 3 increases, the power consumption PL of the load 6 changes to the output power P of the inverter 3! It gets smaller. In this case, depending on the signal from the comparator 18, the selection switch 1
7 changes the selection as the output power setting value of the inverter 3 from the active power setting value 12 to the power consumption PL of the load. Therefore, the output power of the inverter 3 has the same value as the power consumption of the load 6, and it is possible to prevent power from flowing into the power grid, and there is no need to stop the inverter 3. Furthermore, even when the load 6 becomes heavier, the output of the inverter 3 can output the amount of sleep power consumed by the load 6, and the load 6 becomes heavier and becomes heavier than the initial constant power control value of the inverter 3. In this case, the active power setting value 12 is not the reference output and constant power operation is performed.
以上は負荷の有効電力を検出し有効電力が電力系統に流
出しない例について説明したが、負荷に無効電力検出器
を取付けることによって無効＋１１力も配電系統へ流出
しないよう制御することも同僚な方法で可能である。ま
た電力検出器を負荷点に設けるのではなく電力系統の連
系点に設け、電力の潮流方向と電力の大きさを検出し、
インバータから電力系統へ電力が流出するのを防止する
ことも可能である。Above we have explained an example of detecting the active power of the load so that the active power does not flow into the power grid, but it is also possible to control the reactive +11 power so that it does not flow into the power distribution system by installing a reactive power detector on the load. It is possible. In addition, the power detector is not installed at the load point, but at the interconnection point of the power grid to detect the direction of power flow and the magnitude of power.
It is also possible to prevent power from flowing out from the inverter to the power grid.
以上の説明より明らかなように、負荷の電力検出器、比
較器、選択スイッチを追加することによシ、インバータ
を停止することなく配電系統への電力の流出を防止する
ことができる。As is clear from the above description, by adding a load power detector, a comparator, and a selection switch, it is possible to prevent power from flowing into the power distribution system without stopping the inverter.
図は本発明の一実施例を示すブロック図である。
１・・・太陽電池、２・・・コンデンサ、３・・・イン
ノく一タ、４・・・波形成形用フィルター、５・・−開
閉器、６・・・負荷、７・・・配電系統、８・・・有効
電力検出器、９・・・成分分離回路、１０・・・有効電
力検出回路、１１・・・無効電力検出器、１２・・・有
効電力設定回路、１３・・・無効電力設定回路、１４・
・・切換スイッチ、１５・・・電圧制御回路、１６・・
・周波数制御回路、１７・・・選特許庁長官若杉和夫殿
事件の表示
昭和５７年特許願第 １９７５８７号
発 明 の 名 称 インバータの出力電力制御装置補
正をする者
事ｆ↑との関係 特に’ｆ出願人
住 所 東京都千代田区九の内−丁目５番１号名
称（５１０）株式会社 日 立 製 イ乍 所代表者
三 １）勝 茂
代 理 人
居 所 東京都千代田区丸の内−丁目５番１号補正
の 対象 明細書の特許請求の範囲の欄補正ノ 内容
別紙のとおりＯ
特許請求の範囲
１、配電系統と負荷とが出力側に接続されたインバータ
の出力電力制御装置において、インバータ出力電力検出
器と負荷電力検出器とを備え、インバータ出力電力が負
荷電力よりも小さいときはインバータ出力電力設定値を
基準としてインバータ全制御し、それが負荷電力よりも
大きいときはその負荷電力検出器を基準としてインバー
タを制御することを特徴とするインバータの出力電力制
御装置。The figure is a block diagram showing one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Solar cell, 2...Capacitor, 3...Innocent unit, 4...Waveform shaping filter, 5...-Switch, 6...Load, 7...Power distribution system , 8... Active power detector, 9... Component separation circuit, 10... Active power detection circuit, 11... Reactive power detector, 12... Active power setting circuit, 13... Inactive Power setting circuit, 14.
...Selector switch, 15...Voltage control circuit, 16...
・Frequency control circuit, 17... Indication of the case of Mr. Kazuo Wakasugi, Commissioner of the Selected Patent Office Name of the patent application No. 197587 of 1982 Relationship with the person who corrects the output power control device of the inverter f↑ Particularly ' fApplicant Address: 5-1 Kunouchi-chome, Chiyoda-ku, Tokyo
Name (510) Hitachi Co., Ltd. Representative
3 1) Osamu Katsu Shigeyo Residence 5-1 Marunouchi, Chiyoda-ku, Tokyo Correction
Subject of amendments to the scope of claims in the description Contents
As per appendix O Claim 1, an inverter output power control device in which a power distribution system and a load are connected to the output side, comprising an inverter output power detector and a load power detector, the inverter output power is equal to the load power An inverter output power control device characterized in that when the inverter output power setting value is smaller than the load power, the inverter is fully controlled based on the inverter output power setting value, and when the inverter output power setting value is larger than the load power, the inverter is controlled based on the load power detector. .
Claims (1)
の出力電力制御装置において、インバータ出力電力検出
器と負荷電力検出器とを備え、イン・・−タ出力電μが
負荷電力よシも小さいときはインバータ出力電圧設定値
を基準としてインバータ□ を制御し、それが負荷電力
よシも大きいときはその負荷電力検出値を基準としてイ
ンバータを制御することを特徴とするインバータの出力
電力制御装置。1. An inverter output power control device in which a power distribution system and a load are connected to the output side is equipped with an inverter output power detector and a load power detector, and the inverter output power μ is the same as the load power. An inverter output power control device characterized in that when the inverter output voltage setting value is small, the inverter is controlled using the inverter output voltage set value as a reference, and when it is larger than the load power, the inverter is controlled using the detected load power value as the reference. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57197587A JPS5989579A (en) | 1982-11-12 | 1982-11-12 | Output power controller for inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57197587A JPS5989579A (en) | 1982-11-12 | 1982-11-12 | Output power controller for inverter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5989579A true JPS5989579A (en) | 1984-05-23 |
| JPH0456551B2 JPH0456551B2 (en) | 1992-09-08 |
Family
ID=16376965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57197587A Granted JPS5989579A (en) | 1982-11-12 | 1982-11-12 | Output power controller for inverter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5989579A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6318969A (en) * | 1986-07-11 | 1988-01-26 | Hitachi Ltd | Output power controller for inverter |
| JPH01152929A (en) * | 1987-12-08 | 1989-06-15 | Mitsubishi Electric Corp | Controlling method for solar light generator |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50106154A (en) * | 1974-01-21 | 1975-08-21 |
-
1982
- 1982-11-12 JP JP57197587A patent/JPS5989579A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50106154A (en) * | 1974-01-21 | 1975-08-21 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6318969A (en) * | 1986-07-11 | 1988-01-26 | Hitachi Ltd | Output power controller for inverter |
| JPH01152929A (en) * | 1987-12-08 | 1989-06-15 | Mitsubishi Electric Corp | Controlling method for solar light generator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0456551B2 (en) | 1992-09-08 |
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