JP2951141B2 - Method of improving unbalance in single-phase three-wire line and power supply device used therefor - Google Patents
Method of improving unbalance in single-phase three-wire line and power supply device used thereforInfo
- Publication number
- JP2951141B2 JP2951141B2 JP5038548A JP3854893A JP2951141B2 JP 2951141 B2 JP2951141 B2 JP 2951141B2 JP 5038548 A JP5038548 A JP 5038548A JP 3854893 A JP3854893 A JP 3854893A JP 2951141 B2 JP2951141 B2 JP 2951141B2
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- JP
- Japan
- Prior art keywords
- power supply
- phase
- supply device
- line
- wire line
- 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.)
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Classifications
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- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、単相３線式線路におけ
る不平衡の改善方法及びそれに用いる電力供給装置に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for improving unbalance in a single-phase three-wire line and a power supply device used for the method.
【０００２】[0002]
【従来の技術】単相３線式線路は、住宅などの低圧需要
家に電力を供給するための電気方式として大多数の低圧
電灯線に採用されている。単相３線式線路では、負荷平
衡時の電圧降下及び電力損失が単相２線式の４分の１に
減少するので経済的に有利である反面、負荷に不平衡が
あると各電圧線の電圧が不平衡となったり中性線電流が
増加したりし、不平衡電圧が大きい場合には需要家の機
器に過大な電圧が印加される恐れがあるなど、不利な面
もある。2. Description of the Related Art A single-phase three-wire line is used in a large number of low-voltage lamps as an electric system for supplying power to low-voltage consumers such as houses. The single-phase three-wire line is economically advantageous because the voltage drop and the power loss at the time of load balancing are reduced to one-fourth of the single-phase two-wire system. If the unbalanced voltage is large, an excessive voltage may be applied to the consumer's equipment, which may have disadvantages.
【０００３】したがって、従来においては、単相３線式
線路における不平衡をできるだけ少なくするために、例
えばビル又は一般家庭での電気機器やコンセントなどの
配線設計又は配線工事を行う際に、両方の電圧線に対す
る負荷がなるべく均等となるような配慮がなされてい
る。[0003] Therefore, conventionally, in order to minimize unbalance in a single-phase three-wire line, for example, when performing wiring design or wiring work for electrical equipment and outlets in a building or a general home, both wirings are required. Care is taken to make the load on the voltage lines as even as possible.
【０００４】[0004]
【発明が解決しようとする課題】しかし、従来のように
配線によって負荷を均等にすることには限界があり、実
際に機器が使用された場合に両側電圧に不平衡が生じる
のを避け難い。However, there is a limit to equalizing the load by wiring as in the related art, and it is difficult to avoid occurrence of imbalance in the voltage on both sides when the device is actually used.
【０００５】一方、近年における地球環境保護意識の高
まりによって、廃棄物による環境汚染のないクリーンエ
ネルギー、中でも太陽電池を利用した太陽光発電が注目
されている。太陽光発電では、発電電力が太陽の日射量
に応じて大きく変動するので、その有効利用を図るため
に例えば分散形電源システムに組み込まれ、実用化に向
けた実験が進められている。[0005] On the other hand, with the increasing awareness of global environmental protection in recent years, attention has been paid to clean energy free of environmental pollution due to waste, particularly to solar power generation using solar cells. In photovoltaic power generation, the generated power fluctuates greatly according to the amount of solar radiation, so that it is incorporated in, for example, a distributed power supply system for effective use, and experiments for practical use are underway.
【０００６】分散形電源システムにおいては、ビルや一
般家庭に設置した太陽電池の発電電力がインバータを経
て配電系統に連係接続され、自家に必要な電力の一部又
は全部が太陽光発電によって賄われ、さらに電力が余っ
た場合には配電系統を経由して他の家庭へ供給される。In a distributed power supply system, the power generated by a solar cell installed in a building or a general home is connected to a power distribution system via an inverter, and part or all of the power required for the home is covered by solar power generation. If there is more power, it is supplied to other households via the distribution system.
【０００７】つまり、この場合における太陽光発電装置
は、図３に示すような電力供給装置８０として用いられ
る。電力供給装置８０は、太陽電池ＰＶ及びインバータ
ＩＮＶからなり、その出力は単相３線式線路の一方の電
圧線Ｕ１に接続され、負荷Ｌ１に対して電力の供給が行
われる。That is, the solar power generation device in this case is used as a power supply device 80 as shown in FIG. The power supply device 80 includes a solar cell PV and an inverter INV. The output of the power supply device 80 is connected to one voltage line U1 of a single-phase three-wire system, and power is supplied to the load L1.
【０００８】このような従来の電力供給装置８０を用い
た場合において、それに接続された負荷Ｌ１が他方の負
荷Ｌ２よりも大きい（重い）ときには、上述したような
単相３線式線路における不平衡を改善することとなり、
太陽エネルギーの有効利用と相まって極めて好ましい状
況となるが、その逆に負荷Ｌ１が負荷Ｌ２よりも小さい
（軽い）ときには却って不平衡を拡大することになる。In the case where such a conventional power supply device 80 is used, when the load L1 connected thereto is heavier (heavier) than the other load L2, the unbalance in the single-phase three-wire line as described above. Will be improved,
This is a very favorable situation in combination with the effective use of solar energy. On the contrary, when the load L1 is smaller (lighter) than the load L2, the imbalance is rather increased.
【０００９】例えば、負荷Ｌ１がほとんど無いに等しく
負荷Ｌ２のみが存在するといった極端な場合には、中性
線Ｖには負荷Ｌ２への電流と電力供給装置８０から供給
される電流との合計の電流が流れることとなり、負荷Ｌ
２及び線路に障害を発生させる一因となる可能性があ
る。For example, in an extreme case where there is almost no load L1 and only load L2 is present, neutral line V has the sum of the current to load L2 and the current supplied from power supply device 80. The current flows, and the load L
2 and may cause a fault in the track.
【００１０】そのような問題の生じるのを避けるため
に、電力供給装置８０の出力を単相３線式線路に接続す
る際に、単３式トランスと呼称される変圧器を介して両
電圧線Ｕ１，Ｕ２に均等に電力を供給することが提案さ
れている。しかし、それによると、負荷の不平衡による
単相３線式線路の不平衡は何ら改善されないばかりでな
く、特別な変圧器を必要とするためにその設置場所及び
コストに新たな問題が生じる。In order to avoid such a problem, when the output of the power supply device 80 is connected to a single-phase three-wire line, both voltage lines are connected via a transformer called a single-A transformer. It has been proposed to supply power equally to U1 and U2. However, according to this, not only the imbalance of the single-phase three-wire line due to the imbalance of the load is not improved, but also a new problem arises in its installation place and cost due to the necessity of a special transformer.
【００１１】本発明は、上述の問題に鑑み、特別な変圧
器を必要とすることなく、単相３線式線路における不平
衡を改善することを目的とする。In view of the above problems, an object of the present invention is to improve imbalance in a single-phase three-wire line without requiring a special transformer.
【００１２】[0012]
【課題を解決するための手段】請求項１の発明に係る方
法は、単相３線式線路の中性線と２つの電圧線のいずれ
かとの間に選択的に切り換えて電源装置の出力を接続
し、当該単相３線式線路に接続された負荷に対し前記電
源装置による電力の供給を行ううとともに、前記単相３
線式線路における不平衡状態の検出を行い、負荷の重い
側の電圧線に対して前記電源装置の出力を選択的に接続
する、単相３線式線路における不平衡の改善方法であ
る。According to a first aspect of the present invention, there is provided a method for detecting a voltage between a neutral line and two voltage lines of a single-phase three-wire line .
To selectively connect the output of the power supply unit to the power supply unit , and to supply power from the power supply unit to a load connected to the single-phase three-wire line.
This is a method for improving unbalance in a single-phase three-wire line, which detects an unbalanced state in a line, and selectively connects an output of the power supply device to a voltage line on a heavier load side.
【００１３】請求項２の発明に係る装置は、電源装置
と、単相３線式線路の不平衡状態を検出する検出手段
と、前記電源装置の出力を単相３線式線路の中性線と２
つの電圧線のいずれかとの間に選択的に切り換えて接続
するための接続手段と、前記検出手段による検出結果に
基づいて、前記接続手段による接続を単相３線式線路の
負荷の重い側の電圧線に切り換えるための切換え制御手
段と、を有して構成される。According to a second aspect of the present invention, there is provided a power supply device, detecting means for detecting an unbalanced state of the single-phase three-wire line, and an output of the power supply device as a neutral wire of the single-phase three-wire line. And 2
Connecting means for selectively switching between any one of the two voltage lines, and connecting the connecting means based on the detection result by the detecting means on the side of the single-phase three-wire line having a heavy load. Switching control means for switching to a voltage line.
【００１４】請求項３の発明に係る装置では、前記電源
装置として少なくとも一部に太陽電池が用いられて構成
される。According to a third aspect of the present invention, at least a part of the power supply device is constituted by using a solar cell.
【００１５】[0015]
【作用】検出手段によって単相３線式線路の不平衡状態
が検出され、その検出結果に基づいて、電源装置の出力
が両電圧線のいずれか一方に選択的に接続され、電源装
置からの電力が重い方の負荷に対して供給される。The detecting means detects an unbalanced state of the single-phase three-wire line, and the output of the power supply is selectively connected to one of the two voltage lines based on the detection result. Power is supplied to the heavier load.
【００１６】なお、本明細書における負荷には、単相３
線式線路に接続された電気機器、その他電力供給装置か
ら電力の供給を受ける種々の機器が含まれる。Note that the load in this specification is a single-phase three-phase load.
Various devices that receive power supply from a power supply device, such as electric devices connected to a line-type line, are included.
【００１７】[0017]
【実施例】図１は本発明に係る電力供給装置５を単相３
線式線路３に接続した状態を示すブロック図である。電
力供給装置５及び単相３線式線路３によって分散形電源
システム１が形成されている。FIG. 1 shows a power supply device 5 according to the present invention in a single-phase 3
FIG. 3 is a block diagram showing a state where the cable is connected to a linear line 3. The power supply device 5 and the single-phase three-wire line 3 form a distributed power supply system 1.
【００１８】図１において、電力供給装置５は、発電機
である太陽電池ＰＶ、太陽電池ＰＶの発電した直流電力
を交流電力に変換するためのインバータＩＮＶ、制御部
１１、配線用遮断器ＭＣＣＢ、及び変流器ＣＴなどから
構成されている。In FIG. 1, a power supply device 5 includes a solar cell PV as a generator, an inverter INV for converting DC power generated by the solar cell PV into AC power, a control unit 11, a circuit breaker MCCB, And a current transformer CT.
【００１９】インバータＩＮＶからの出力電力は、接点
ＲＹ１ｂ又はＲＹ１ａを介し、中性線Ｖと２つの電圧線
Ｕ１，Ｕ２のいずれかとの間に選択的に切り換えて接続
される。その際に、インバータＩＮＶの出力波形を電圧
線Ｕ１，Ｕ２の各相の状態に合わすべく、位相制御又は
同期制御などが行われる。The output power from the inverter INV is selectively switched and connected between the neutral line V and one of the two voltage lines U1 and U2 via the contact point RY1b or RY1a. At this time, phase control or synchronization control is performed to match the output waveform of the inverter INV to the state of each phase of the voltage lines U1 and U2.
【００２０】制御部１１には、検出部２１、切換え制御
部２２、及びリレーＲＹなどが設けられている。検出部
２１は、中性線Ｖに流れる電流Ｉ０及び両電圧線Ｕ１，
Ｕ２の電圧Ｅ１，Ｅ２に基づいて、単相３線式線路３の
不平衡状態を検出する。切換え制御部２２は、インバー
タＩＮＶの出力ライン３１を負荷Ｌ１，Ｌ２の重い側の
電圧線Ｕ１，Ｕ２に接続すべく、検出部２１の検出結果
に応じてリレーＲＹを動作させ、接点ＲＹ１ｂ，ＲＹ１
ａを切り換える。なお、負荷の重い側の電圧線の電圧が
低下するから、電圧Ｅ１及びＥ２を検出して互いに比較
することによって、負荷Ｌ１と負荷Ｌ２とのいずれの方
が重いかを検出可能である。The control section 11 includes a detection section 21, a switching control section 22, a relay RY, and the like. The detection unit 21 detects the current I0 flowing through the neutral line V and the two voltage lines U1,
An unbalanced state of the single-phase three-wire line 3 is detected based on the voltages E1 and E2 of U2. The switching control unit 22 operates the relay RY according to the detection result of the detection unit 21 to connect the output line 31 of the inverter INV to the voltage lines U1 and U2 on the heavy side of the loads L1 and L2, and the contacts RY1b and RY1.
Switch a. Since the voltage of the voltage line on the heavier load side decreases, it is possible to detect which of the load L1 and the load L2 is heavier by detecting the voltages E1 and E2 and comparing them with each other.
【００２１】次に、図２に示すフローチャートに基づい
て電力供給装置５の動作を説明する。電力供給装置５が
起動すると、電圧線Ｕ１，Ｕ２の各電圧Ｅ１，Ｅ２が検
出され、それらが互いに比較される（＃１）。電圧Ｅ１
の方が低い場合にはリレーＲＹがオンすることなく、接
点ＲＹ１ｂが閉じた状態を維持し、電圧Ｅ２の方が低い
場合にはリレーＲＹがオンして接点ＲＹ１ａが閉じる。
これによって、インバータＩＮＶの出力ライン３１が電
圧線Ｕ１，Ｕ２のうちの電圧の低い側、すなわち負荷の
重い側に接続される（＃２）。Next, the operation of the power supply device 5 will be described with reference to the flowchart shown in FIG. When the power supply device 5 starts, the voltages E1 and E2 of the voltage lines U1 and U2 are detected and compared with each other (# 1). Voltage E1
When the voltage E2 is lower, the relay RY does not turn on and the contact RY1b remains closed, and when the voltage E2 is lower, the relay RY turns on and the contact RY1a closes.
As a result, the output line 31 of the inverter INV is connected to the lower voltage side of the voltage lines U1 and U2, that is, the side with the heavier load (# 2).
【００２２】インバータＩＮＶが過度現象を生じないよ
うにソフトスタートし、太陽電池ＰＶから得られた電力
が単相３線式線路３に接続された負荷Ｌ１又はＬ２に供
給される（＃３）。The inverter INV soft-starts so as not to cause an excessive phenomenon, and the power obtained from the solar cell PV is supplied to the load L1 or L2 connected to the single-phase three-wire line 3 (# 3).
【００２３】中性線Ｖに流れる電流Ｉ０が検出され、電
流Ｉ０と一定の基準値ＩＳとの比較によって電流Ｉ０が
過大であるか否かが判断される（＃４）。電流Ｉ０が基
準値ＩＳに達するまでは、電流Ｉ０の監視が継続され
（＃４でノー）、電流Ｉ０が過大となったときには（＃
４でイエス）、インバータＩＮＶが一旦停止した後、リ
レーＲＹの接点ＲＹ１ｂ，ＲＹ１ａの切り換えによりイ
ンバータＩＮＶの出力ライン３１が反対側の電圧線Ｕ１
又はＵ２に接続され（＃５）、その後、インバータＩＮ
Ｖがソフトスタートする（＃６）。これによって、負荷
Ｌ１，Ｌ２のうちの重い側にインバータＩＮＶの出力電
力が供給され、単相３線式線路３の不平衡が改善され
る。接点ＲＹ１ｂ，ＲＹ１ａが切り換えられた後は、電
流Ｉ０の監視が継続される（＃４）。The current I0 flowing through the neutral line V is detected, and it is determined whether the current I0 is excessive by comparing the current I0 with a fixed reference value IS (# 4). Until the current I0 reaches the reference value IS, the monitoring of the current I0 is continued (No in # 4), and when the current I0 becomes excessive (##
4), after the inverter INV is temporarily stopped, the output line 31 of the inverter INV is switched to the opposite voltage line U1 by switching the contacts RY1b and RY1a of the relay RY.
Or connected to U2 (# 5), and then the inverter IN
V soft-starts (# 6). As a result, the output power of the inverter INV is supplied to the heavy side of the loads L1 and L2, and the unbalance of the single-phase three-wire line 3 is improved. After the contacts RY1b and RY1a are switched, the monitoring of the current I0 is continued (# 4).
【００２４】接点ＲＹ１ｂ，ＲＹ１ａを切り換えても不
平衡が改善されない場合には（＃７でノー）、異常モー
ドに入る（＃８）。異常モードでは、例えばインバータ
ＩＮＶの出力を徐々に低下させていき、それでも異常が
続いている場合には配線用遮断器ＭＣＣＢをオフする。
これによって電力供給装置５は待機状態となり、図示し
ない表示部にその旨を示すメッセージが表示される。If the unbalance is not improved even when the contacts RY1b and RY1a are switched (No in # 7), an abnormal mode is entered (# 8). In the abnormal mode, for example, the output of the inverter INV is gradually reduced, and if the abnormality still continues, the circuit breaker MCCB is turned off.
As a result, the power supply device 5 enters a standby state, and a message to that effect is displayed on a display unit (not shown).
【００２５】なお、ステップ＃７では、例えば接点ＲＹ
１ｂ，ＲＹ１ａの切り換え前後の電流Ｉ０が比較され、
切り換え後に電流Ｉ０が減少していなければノーと判断
される。また、ステップ＃５でのリレーＲＹの切り換え
の前に、配線用遮断器ＭＣＣＢを一旦オフとし、リレー
ＲＹを切り換えた後に再度オンとするような制御を行っ
てもよい。In step # 7, for example, the contact RY
1b and RY1a are compared before and after switching current I0,
If the current I0 has not decreased after the switching, it is determined to be no. Further, control may be performed such that the circuit breaker MCCB for wiring is once turned off before switching the relay RY in step # 5, and then turned on again after switching the relay RY.
【００２６】上述の実施例によると、従来の電力供給装
置８０のように単相３線式線路の不平衡を拡大する恐れ
がなくなり且つ単３式トランスのような特別な変圧器が
不要となるばかりでなく、電力供給装置５によって単相
３線式線路３における不平衡の改善が図られる。According to the above-described embodiment, there is no danger of expanding the unbalance of the single-phase three-wire line unlike the conventional power supply device 80, and a special transformer such as a single-type transformer is not required. In addition, the imbalance in the single-phase three-wire line 3 is improved by the power supply device 5.
【００２７】したがって、電圧Ｅ１，Ｅ２に大きな不平
衡が生じることが防止され、中性線Ｖに流れる電流Ｉ０
が減少し、単相３線式線路３及び負荷Ｌ１，Ｌ２として
接続される電気機器の障害の発生が防止される。Therefore, occurrence of large imbalance between voltages E1 and E2 is prevented, and current I0 flowing through neutral line V is prevented.
And the failure of the electric equipment connected as the single-phase three-wire line 3 and the loads L1 and L2 is prevented.
【００２８】また、発電機として太陽電池ＰＶを用いて
いるので、太陽エネルギーの有効利用が図られるととも
に、太陽電池ＰＶの発電電力が余った場合には、他のビ
ルや家庭に接続された負荷Ｌ１，Ｌ２へ、さらには柱上
変圧器Ｔを介して別の負荷へ電力が供給される。このよ
うに、電力供給装置５は分散形電源システム１に好適に
用いることができる。Further, since the solar cell PV is used as a power generator, the solar energy can be effectively used, and when the power generated by the solar cell PV becomes excessive, a load connected to another building or home can be used. Power is supplied to L1 and L2, and further to another load via the pole transformer T. As described above, the power supply device 5 can be suitably used for the distributed power supply system 1.
【００２９】上述の実施例のステップ＃４においては、
中性線Ｖに流れる電流Ｉ０によって不平衡状態の検出を
行っているが、これに代えて又はこれとともに、電圧線
Ｕ１，Ｕ２の電圧Ｅ１，Ｅ２を比較することにより行っ
てもよい。In step # 4 of the above embodiment,
Although the unbalanced state is detected by the current I0 flowing through the neutral line V, the detection may be performed by comparing the voltages E1 and E2 of the voltage lines U1 and U2 instead or together with this.
【００３０】上述の実施例において、リレーＲＹに代え
て無接点素子を用いてもよい。太陽電池ＰＶに代えて、
又は太陽電池ＰＶとともに、例えば燃料電池などの他の
発電装置を用いてもよい。その他、リレーＲＹ、接点Ｒ
Ｙ１ｂ，ＲＹ１ａ、検出部２１、切換え制御部２２、制
御部１１、又は電力供給装置５などの構成及び動作内
容、フローチャートの内容及び順序などは、本発明の主
旨に沿って上述した以外に種々変更することができる。In the above embodiment, a contactless element may be used instead of the relay RY. Instead of solar cell PV,
Alternatively, another power generation device such as a fuel cell may be used together with the solar cell PV. In addition, relay RY, contact R
The configuration and operation contents of the Y1b, RY1a, the detection unit 21, the switching control unit 22, the control unit 11, the power supply device 5, and the like, the contents of the flowchart, the order, and the like are variously changed in addition to those described above in accordance with the gist of the present invention. can do.
【００３１】[0031]
【発明の効果】本発明によると、単３式トランスのよう
な特別な変圧器を必要とすることなく、単相３線式線路
における不平衡を改善することができる。しかも、電源
装置を接続することによる不平衡のみでなく、負荷の不
平衡などによる単相３線式線路の不平衡をも改善するこ
とができる。According to the present invention, the unbalance in a single-phase three-wire line can be improved without requiring a special transformer such as a single-A transformer. Moreover, not only the unbalance due to the connection of the power supply device but also the unbalance of the single-phase three-wire line due to the unbalance of the load can be improved.
【００３２】請求項３の発明によると、太陽エネルギー
の有効利用を図るとともに、単相３線式線路における不
平衡を改善することができる。According to the third aspect of the present invention, it is possible to effectively utilize solar energy and to improve imbalance in a single-phase three-wire line.
【図１】本発明に係る電力供給装置を単相３線式線路に
接続した状態を示すブロック図である。FIG. 1 is a block diagram showing a state in which a power supply device according to the present invention is connected to a single-phase three-wire line.
【図２】本発明に係る電力供給装置の動作を説明するた
めのフローチャートである。FIG. 2 is a flowchart for explaining the operation of the power supply device according to the present invention.
【図３】従来における電力供給装置を示すブロック図で
ある。FIG. 3 is a block diagram showing a conventional power supply device.
３ 単相３線式線路 ５ 電力供給装置 ２１ 検出部（検出手段） ２２ 切換え制御部（切換え制御手段） ＲＹ リレー（接続手段） ＲＹ１ｂ，ＲＹ１ａ 接点（接続手段） ＩＮＶ インバータ（電源装置） ＰＶ 太陽電池（電源装置） Ｕ１，Ｕ２ 電圧線 Ｖ 中性線 Ｌ１，Ｌ２ 負荷 Reference Signs List 3 single-phase three-wire line 5 power supply device 21 detection unit (detection unit) 22 switching control unit (switching control unit) RY relay (connection unit) RY1b, RY1a contact (connection unit) INV inverter (power supply device) PV solar cell (Power supply unit) U1, U2 Voltage line V Neutral line L1, L2 Load
───────────────────────────────────────────────────── フロントページの続き (72)発明者 萩原 龍蔵 大阪府守口市京阪本通２丁目18番地 三 洋電機株式会社内 (56)参考文献 特開 平５−308780（ＪＰ，Ａ) 特開 平４−54830（ＪＰ，Ａ) 特開 平４−265632（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) H02J 3/00 - 5/00 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Ryuzo Hagiwara 2-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (56) References JP-A-5-308780 (JP, A) JP-A Heisei 4-54830 (JP, A) JP-A-4-265632 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) H02J 3/00-5/00
Claims (3)
のいずれかとの間に選択的に切り換えて電源装置の出力
を接続し、当該単相３線式線路に接続された負荷に対し
前記電源装置による電力の供給を行ううとともに、 前記単相３線式線路における不平衡状態の検出を行い、
負荷の重い側の電圧線に対して前記電源装置の出力を選
択的に接続することを特徴とする単相３線式線路におけ
る不平衡の改善方法。A neutral line and two voltage lines for a single-phase three-wire line
Together will perform selectively switches to connect the output of the power supply, power supply by the power supply to the load connected to the single-phase three-wire line between any of the single-phase 3 Detects unbalanced state in wire-type line,
Select the output of the power supply for the voltage line on the heavy load side.
A method for improving unbalance in a single-phase three-wire line, characterized by selectively connecting.
電圧線のいずれかとの間に選択的に切り換えて接続する
ための接続手段と、 前記検出手段による検出結果に基づいて、前記接続手段
による接続を単相３線式線路の負荷の重い側の電圧線に
切り替えるための切換え制御部と、 を有してなることを特徴とする電力供給装置。2. A power supply device, a detecting means for detecting an unbalanced state of a single-phase three-wire line, and an output of the power supply device being connected to one of a neutral line and two voltage lines of the single-phase three-wire line. Connecting means for selectively switching between and connecting, and based on a detection result by the detecting means, for switching the connection by the connecting means to a voltage line on the heavier load side of the single-phase three-wire line. A power supply device comprising: a switching control unit.
陽電池が用いられている請求項２記載の電力供給装置。3. The power supply device according to claim 2, wherein a solar cell is used as at least a part of the power supply device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5038548A JP2951141B2 (en) | 1993-02-26 | 1993-02-26 | Method of improving unbalance in single-phase three-wire line and power supply device used therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5038548A JP2951141B2 (en) | 1993-02-26 | 1993-02-26 | Method of improving unbalance in single-phase three-wire line and power supply device used therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06253457A JPH06253457A (en) | 1994-09-09 |
| JP2951141B2 true JP2951141B2 (en) | 1999-09-20 |
Family
ID=12528349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5038548A Expired - Fee Related JP2951141B2 (en) | 1993-02-26 | 1993-02-26 | Method of improving unbalance in single-phase three-wire line and power supply device used therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2951141B2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI125287B (en) | 2013-02-04 | 2015-08-14 | Fortum Oyj | System and method for connecting a single-phase power source to a multi-phase power grid |
| JP6201692B2 (en) * | 2013-11-28 | 2017-09-27 | 富士通株式会社 | Estimation program, estimation method, and estimation apparatus |
| JP6376997B2 (en) * | 2015-03-13 | 2018-08-22 | シャープ株式会社 | Power system and control method of power system |
| JP6308321B2 (en) * | 2017-07-18 | 2018-04-11 | 富士通株式会社 | Estimation program, estimation method, and estimation apparatus |
| JP6963489B2 (en) * | 2017-12-15 | 2021-11-10 | ニチコン株式会社 | Connection switching device provided in the power supply system |
-
1993
- 1993-02-26 JP JP5038548A patent/JP2951141B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06253457A (en) | 1994-09-09 |
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