JPS59230433A - Series inverter array releasing device at line stopping time - Google Patents
Series inverter array releasing device at line stopping timeInfo
- Publication number
- JPS59230433A JPS59230433A JP58103920A JP10392083A JPS59230433A JP S59230433 A JPS59230433 A JP S59230433A JP 58103920 A JP58103920 A JP 58103920A JP 10392083 A JP10392083 A JP 10392083A JP S59230433 A JPS59230433 A JP S59230433A
- Authority
- JP
- Japan
- Prior art keywords
- inverter
- frequency
- distribution line
- signal
- output
- 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
- 239000000284 extract Substances 0.000 claims 1
- 230000010355 oscillation Effects 0.000 description 8
- 238000001514 detection method Methods 0.000 description 6
- 230000001360 synchronised effect Effects 0.000 description 5
- 238000010248 power generation Methods 0.000 description 4
- 230000010363 phase shift Effects 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
この発明は配電線に連糸されたインバータを配電線の停
止時に解列する連系インバータ解列装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a grid-connected inverter disconnection device for disconnecting inverters connected to a power distribution line when the power distribution line is stopped.
周知のように、太陽光発電装置や燃料電池よする給電を
停止する必要がある。As is well known, it is necessary to stop power supply from solar power generation devices and fuel cells.
従来、小水力発電装置なとン配電線に連系する場合にお
いては、転送遮断方式！採用し、事故時等において配電
線への給電を停止している。Conventionally, when connecting small hydroelectric power generation equipment to the distribution line, the transfer cutoff method was used! This system is adopted to stop power supply to distribution lines in the event of an accident.
しかし、小容量の太陽光発電装置が配電線系統に数多く
接続されている場合、各装置にこの方式を適用すること
は経済的に不利である。However, when a large number of small-capacity solar power generation devices are connected to a distribution line system, it is economically disadvantageous to apply this method to each device.
この発明は上記事情に基づいてなされたものであり、そ
の目的とするところは配電線の停止時に確実にインパー
タン配電線から解列することができ、しかも、経済的に
有オリな線路停止時の連系インバータ解列装置を提供し
ようとするものである。This invention was made based on the above-mentioned circumstances, and its purpose is to be able to reliably disconnect from the impertinent distribution line when the distribution line is stopped, and to be able to disconnect from the impertinent distribution line when the line is stopped, which is economically advantageous. The present invention aims to provide a grid-connected inverter disconnection device.
以下、この発明の一実施例について図面を参照して説明
する。An embodiment of the present invention will be described below with reference to the drawings.
第１図において、配電線１１は接続線ｌによって分岐さ
れ、この接続ｋｌ１ｗ介して第２図（ａ）に示す如く、
商用周波数の正弦波信号が同期信号整形回路１２に供給
される。この同期信号整形回路１２は入力された正弦波
信号に同期して、第２図（ｂ）に示す如く、同一周波数
で方形波からなる同期４１号Ｚ生成するものである。こ
の生成された同期信号は移相回路１３に供給され、この
移相回路１３において、第２図（ｅ）に示す如く入力さ
れた同期信号の位相が１８０°進められる。このように
することにより、後述するインバータ１５の出力が正帰
還されることを防止できる。この移相回路１３より出力
される同期信号は発振回路１４に供給される。この発振
回路１４は周知の同期発振器であり、前記同期信号が供
給されている場合は同期信号と同一周波数で発振動作さ
れ、同期信号の供給が停止されると、同期信号の周波数
より例えは５Ｈｚ程度低い個有周波数で自励発振するよ
うに構成されている。この発振回路１４の出力信号はイ
ンバータ１５に供給される。このインバータ１５は発振
回路１４の出力信号によって動作され、例えば太陽電池
等からなる直流電源１６の出力ミカン交流電力に変換す
るものである。したがって、このインバータ１５は配電
線１ノが正常である場合、前記発振回路１４より供給さ
れる商用周波数と同一の信号によって動され、商用周波
数と同一位相の又流電力を発生している。このインバー
タ１５において発生された電力はインバータ母線１７お
よび閉成された遮断器１８を介して前記配電線１１に供
給される。猿だ、前記インバータ母線１７には周波数検
出回路１９が接続されている。この周波数検出回路１９
はインバータ１５より出力される交流電力の周波数変化
を検出し１ｍ」記遮断器１８を制御するものである。即
ち、配電線１１が正常である場合は、前記インバータ１
５より商用周波数と同一の交流電力が出力されており、
この状態においては前記遮断器１８が閉成状態を保持す
るよう制御している。一方、配電線１１の電力が第２図
（ａ）にＡＢＮで示す如く停止した場合は、同図（ｂ）
に示す如く同期（Ｎ号整形回路１２、移相回路１３より
同期信号が得られなくなるため、発振回路１４は第２ｔ
Ｊ （ｄ）に示す如く商用周波数１． より５Ｈｚ低い
自己の周波数ｔ、で発振するようになる。よって、イン
バータ１５より出力される交流電力の周波数もこれとと
もに低くなり、周波数検出回路１９ではこの周波数変化
が検出される。しかして、この周波数検出回路１９より
出力される制御信号によって前記遮断器が開放され、イ
ンバータ１５（ｄ配電線１１より解列される。In FIG. 1, the distribution line 11 is branched by a connection line l, and via this connection kl1w, as shown in FIG. 2(a),
A commercial frequency sine wave signal is supplied to the synchronization signal shaping circuit 12 . This synchronous signal shaping circuit 12 generates synchronous signal No. 41 Z consisting of a square wave at the same frequency, as shown in FIG. 2(b), in synchronization with the input sine wave signal. This generated synchronization signal is supplied to the phase shift circuit 13, where the phase of the input synchronization signal is advanced by 180 degrees as shown in FIG. 2(e). By doing so, it is possible to prevent the output of the inverter 15, which will be described later, from being fed back positively. The synchronization signal output from this phase shift circuit 13 is supplied to an oscillation circuit 14. This oscillation circuit 14 is a well-known synchronous oscillator, and when the synchronizing signal is supplied, it oscillates at the same frequency as the synchronizing signal, and when the supply of the synchronizing signal is stopped, the frequency is lower than the frequency of the synchronizing signal, for example by 5 Hz. It is configured to self-oscillate at a relatively low unique frequency. The output signal of this oscillation circuit 14 is supplied to an inverter 15. This inverter 15 is operated by the output signal of the oscillation circuit 14, and converts it into AC power output from a DC power source 16, such as a solar battery. Therefore, when the power distribution line 1 is normal, the inverter 15 is driven by the same signal as the commercial frequency supplied from the oscillation circuit 14, and generates cross-current power having the same phase as the commercial frequency. Electric power generated in this inverter 15 is supplied to the distribution line 11 via an inverter bus 17 and a closed circuit breaker 18. Well, a frequency detection circuit 19 is connected to the inverter bus 17. This frequency detection circuit 19
Detects the frequency change of the AC power output from the inverter 15 and controls the 1 m long circuit breaker 18. That is, if the distribution line 11 is normal, the inverter 1
5 outputs AC power that is the same as the commercial frequency,
In this state, the circuit breaker 18 is controlled to remain closed. On the other hand, if the power on the distribution line 11 is stopped as shown by ABN in Fig. 2(a),
As shown in FIG.
J As shown in (d), the commercial frequency 1. It begins to oscillate at its own frequency t, which is 5 Hz lower. Therefore, the frequency of the AC power output from the inverter 15 also decreases, and the frequency detection circuit 19 detects this frequency change. Then, the circuit breaker is opened by the control signal outputted from the frequency detection circuit 19, and the inverter 15 (d is disconnected from the distribution line 11).
上記構成によれば、発振回路１４′５ｒ−配電線１１の
系統周波数と同期させるとともに、配電ｋｌＪが停止し
た場合は系統周波数より若干低い周波数の信号を出力可
能とし、この発振回路１４の出力（Ｍ号によつ°Ｃ制御
されるインバータ１５の出力周波数変化ン周波数検出回
路１９により検出し、遮断器１８を制御している。した
がって、配電線１１が停止状態となると同時に確実にイ
ンバータ１５を解列することができる。According to the above configuration, the oscillation circuit 14'5r is synchronized with the system frequency of the distribution line 11, and when the power distribution klJ is stopped, it is possible to output a signal with a frequency slightly lower than the system frequency, and the output of this oscillation circuit 14 ( Changes in the output frequency of the inverter 15 controlled by °C are detected by the frequency detection circuit 19 and the circuit breaker 18 is controlled. Can be disassembled.
また、上記構成は比較的簡単、且つ安価であるため、小
規模な太陽先発電装＃等に好適である。Further, since the above configuration is relatively simple and inexpensive, it is suitable for small-scale solar power generation systems and the like.
以上、詳述したようにこの発明によれは、配電線の停止
時に確実にインバータを配電線から解列することができ
、しかも、経済的に刹利な線路停止時の連系インバータ
解列装置を提供できる。As described in detail above, the present invention enables reliable disconnection of the inverter from the distribution line when the distribution line is stopped, and is economically advantageous. can be provided.
第１図はこの発明に係わる線路停止時の連系インバータ
解列装置の一実施例〉示す栴成因、第２図は第１−の動
作を説明するために示す波形図である。
１１・・・配電線、１２・・・同期信号整形回路、１３
・・・移相回路、１４・・・発振回路、１５・・・イン
バータ、１８・・・遮断器、１９・・・周波数検出回路
。
出動人代理人 弁理士 鈴 江 武 彦第１図
１１
第２図
１５９−FIG. 1 is a waveform chart showing an embodiment of the system for disconnecting interconnected inverters when a line is stopped according to the present invention, and FIG. 2 is a waveform diagram showing the operation of the first embodiment. 11... Distribution line, 12... Synchronous signal shaping circuit, 13
... Phase shift circuit, 14 ... Oscillation circuit, 15 ... Inverter, 18 ... Breaker, 19 ... Frequency detection circuit. Representative of dispatcher Patent attorney Takehiko Suzue Figure 1 11 Figure 2 159-
Claims (1)
する手段と、この手段より出力される同期信書の位相ン
１８０°進める手段と、この移相された同期信号と同一
周波数の他失ヲ出力するとともに、この同期信号が停止
した場合同期俗骨と若干異なる個有周波数の信器を発振
可能な発振器と、この発振器の出力信号によって駆動さ
れるインバータと、このインバータと前記配電線間に介
在され常時は閉成されてインバータの出カン配電線に供
給する遮断器と、前記インバータの出力が供給されこの
出力電圧の周波数変化を検出して前記遮断器ン遮断状態
とする手段とン具備したことン特徴とする線路停止時の
連系インバータ解列装置。A signal that extracts the grid frequency of the distribution line and synchronizes with it! means for generating, and means for advancing the phase of the synchronization letter outputted from this means by 180°, and outputting the same frequency as the phase-shifted synchronization signal, and when the synchronization signal stops, the synchronization signal is outputted. an oscillator capable of oscillating a signal with a unique frequency slightly different from that of the oscillator; an inverter driven by the output signal of the oscillator; and a normally closed power distribution line interposed between the inverter and the distribution line. A grid-connected inverter solution at the time of line stoppage, characterized in that the circuit breaker is supplied with the output of the inverter, and a means for detecting the frequency change of the output voltage and setting the circuit breaker in the cut-off state. Column device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58103920A JPS59230433A (en) | 1983-06-10 | 1983-06-10 | Series inverter array releasing device at line stopping time |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58103920A JPS59230433A (en) | 1983-06-10 | 1983-06-10 | Series inverter array releasing device at line stopping time |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59230433A true JPS59230433A (en) | 1984-12-25 |
| JPS6366143B2 JPS6366143B2 (en) | 1988-12-19 |
Family
ID=14366857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58103920A Granted JPS59230433A (en) | 1983-06-10 | 1983-06-10 | Series inverter array releasing device at line stopping time |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59230433A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6289429A (en) * | 1985-10-11 | 1987-04-23 | 三洋電機株式会社 | Power failure detecting method |
| JPS63287328A (en) * | 1987-05-18 | 1988-11-24 | Central Res Inst Of Electric Power Ind | Counter charge preventing method for connected commercial frequency power line using distributed power source |
| JPH01177832A (en) * | 1988-01-05 | 1989-07-14 | Toshiba Corp | Power storage system |
-
1983
- 1983-06-10 JP JP58103920A patent/JPS59230433A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6289429A (en) * | 1985-10-11 | 1987-04-23 | 三洋電機株式会社 | Power failure detecting method |
| JPS63287328A (en) * | 1987-05-18 | 1988-11-24 | Central Res Inst Of Electric Power Ind | Counter charge preventing method for connected commercial frequency power line using distributed power source |
| JPH01177832A (en) * | 1988-01-05 | 1989-07-14 | Toshiba Corp | Power storage system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6366143B2 (en) | 1988-12-19 |
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