JPS60210168A - Output power controller of inverter - Google Patents

Output power controller of inverter

Info

Publication number
JPS60210168A
JPS60210168A JP59065746A JP6574684A JPS60210168A JP S60210168 A JPS60210168 A JP S60210168A JP 59065746 A JP59065746 A JP 59065746A JP 6574684 A JP6574684 A JP 6574684A JP S60210168 A JPS60210168 A JP S60210168A
Authority
JP
Japan
Prior art keywords
power
inverter
output
distribution system
load
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.)
Pending
Application number
JP59065746A
Other languages
Japanese (ja)
Inventor
Masashi Toyoda
昌司 豊田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP59065746A priority Critical patent/JPS60210168A/en
Publication of JPS60210168A publication Critical patent/JPS60210168A/en
Pending legal-status Critical Current

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)
  • Inverter Devices (AREA)

Abstract

PURPOSE:To prevent power to a power distribution system from reversely flowing by detecting the power direction of the system and automatically reducing the set value of the output power of an inverter when the output power of the verter is reversely flowed to the system. CONSTITUTION:A power distribution system voltage detector and a current transformer 15 are provided between a load 6 and a power distribution system 5 in a circuit in which the output of a DC power source 1 is connected through an inverter 2, a filter 3 and a switch 4 with the load 6 and the system 5 to input the detected value to a power direction detector 8. When no reverse power flow occurs to the system 5, the inverter 2 is mormally operated by the output signals P of an effective power signal converter 7 and a synchronous controller 15 on the basis of the set value P0 of a microprocessor 10, but if a load power decreases to detect the reverse flow to the system 5, the set value of the microprocessor 10 is decreased to suppress the output of the inverter 2.

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繋運転を行なうインバータの出力
電力制御装置に関する。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 operates in conjunction with a power distribution system.

〔発明の背景〕[Background of the invention]

インバータを配電系統と連繋運転を行ない、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では
、インバータが定出力運転をしている場合、負荷が変動
し、インバータに出力電力より、負荷電力より大きい場
合には、配電系統に電力が逆流する問題があった。In a system where the inverter is operated in conjunction with the power distribution system and power is supplied from the distribution system and the inverter to the same load, when the inverter is operating at a constant output, the load fluctuates and the inverter output power is lower than the load power. If it was large, there was a problem that power would flow back into the power distribution system.

〔発明の目的〕[Purpose of the invention]

本発明の目的は、配電系統と連繋運転を行なうインバー
タにおいて、配電系統へ電力が逆流しないように、イン
バータの出力電力を自動調整する装置を提供するにある
。An object of the present invention is to provide a device that automatically adjusts the output power of an inverter that operates in conjunction with a power distribution system so that power does not flow back to the power distribution system.

〔発明の概要〕[Summary of the invention]

本発明の要点は、配電系統の電力方向のみを検出してイ
ンバータの出力電力が配電系統に逆流した場合は、出力
電力の設定値を自動的に小さくして、インバータの出力
電力が、配電系統に逆流しないようにインバータの出力
電力を制御するにある。The main point of the present invention is that when only the power direction of the power distribution system is detected and the output power of the inverter flows backward into the power distribution system, the set value of the output power is automatically reduced and the output power of the inverter is The goal is to control the inverter's output power to prevent backflow.

〔発明の実施例〕[Embodiments of the invention]

以下、本発明の一実施例を図を用いて説明する。 An embodiment of the present invention will be described below with reference to the drawings.

直流電源１の出力は、インバータ２に入力される。The output of DC power supply 1 is input to inverter 2 .

インバータ２の出力は、波形成形用のフィルター３およ
び開閉器４を通して負荷６および配電系統５に達する。The output of the inverter 2 passes through a waveform shaping filter 3 and a switch 4 to reach a load 6 and a power distribution system 5.

変流器１４の電流信号とインバータの電圧を有効電力信
号変換装置７に取り込み、インバータの出力電圧信号Ｐ
、を検出し、伴流器１５の電流信号と配電系統電圧を電
力方向検出装置８に取り込み、配電系統５へ電力が逆流
しているか否かを検出する。The current signal of the current transformer 14 and the voltage of the inverter are taken into the active power signal converter 7, and the output voltage signal P of the inverter is
, the current signal of the follower 15 and the power distribution system voltage are taken into the power direction detection device 8, and it is detected whether or not the power is flowing backward to the power distribution system 5.

同期制御回路１３は、配電系統５の電圧を用いてインバ
ータ３を配電系統５に同期させる回路で。The synchronous control circuit 13 is a circuit that synchronizes the inverter 3 with the power distribution system 5 using the voltage of the power distribution system 5.

この同期制御回路１３の出力信号と、出力電圧設定値Ｐ
　ｐａｔとインバータの出力電力信号Ｐ１の差信号を周
波数制御回路１２に入力し、インバータ２の配電系統５
に対する電圧位相差を制御することによってインバータ
２の出力電力を制御する。The output signal of this synchronous control circuit 13 and the output voltage setting value P
pat and the inverter output power signal P1 is input to the frequency control circuit 12, and the power distribution system 5 of the inverter 2 is input to the frequency control circuit 12.
The output power of the inverter 2 is controlled by controlling the voltage phase difference with respect to the inverter 2.

負荷６の電力が、マイクロプロセッサ１０により設定さ
れた定電力信号をデジタル・アナログ変換器により変換
出力した電力設定値によって制御されたインバータ２の
電力より大きいときは、この電力設定値に従い、インバ
ータ２は定出力運転を行なう。When the power of the load 6 is larger than the power of the inverter 2 controlled by the power setting value obtained by converting and outputting the constant power signal set by the microprocessor 10 by the digital-to-analog converter, the power of the inverter 2 is controlled according to the power setting value. performs constant output operation.

一方、負荷６が変動し、インバータ２の出力電力が負荷
電力より大きくなった場合は、配電系統５に電力が逆流
し、電力方向検出装置８が、逆流を検出する。この電力
方向検出装置８の信号をデジタル入力回路９を介してマ
イクロプロセッサ１０に取り込み、逆流検出時は、電力
設定値によりある一定の値を順次、減算する演算を行な
って電力設定値を小さくしてゆき、逆流を検出しない時
は、ある一定の値を電力設定値に加算する演算を行なう
。以上の演算された電力設定値により、インバータ２の
出力電力は、逆流検出点付近で平衡し、配電系統５への
電力の逆流を防止することができる。図中１１はＤ／Ａ
変換器である。On the other hand, when the load 6 fluctuates and the output power of the inverter 2 becomes larger than the load power, power flows backward into the power distribution system 5, and the power direction detection device 8 detects the reverse flow. The signal from the power direction detection device 8 is input to the microprocessor 10 via the digital input circuit 9, and when backflow is detected, a certain value is sequentially subtracted from the power setting value to reduce the power setting value. Then, when no backflow is detected, an operation is performed to add a certain value to the power setting value. With the above calculated power setting value, the output power of the inverter 2 is balanced near the backflow detection point, and backflow of power to the power distribution system 5 can be prevented. 11 in the figure is D/A
It is a converter.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、インバータの出力電力の配電系統への
逆流を防止することができる。According to the present invention, it is possible to prevent the output power of the inverter from flowing back into the power distribution system.

【図面の簡単な説明】[Brief explanation of the drawing]

輩１図は、本発明の一実施例のインバータの出力電力制
御装置のブロック図である。 ７・・・有効電力信号変換装置、８・・・電力方向検出
装置、９・・・デジタル入力回路、１ｏ・・・マイクロ
プロセッサ、１１・・・デジタル・アナログ変換器。 代理人　弁理士　高橋明夫Figure 1 is a block diagram of an inverter output power control device according to an embodiment of the present invention. 7... Active power signal converter, 8... Power direction detection device, 9... Digital input circuit, 1o... Microprocessor, 11... Digital-to-analog converter. Agent Patent Attorney Akio Takahashi

Claims (1)

【特許請求の範囲】 ・１．配電系統と負荷が出力側に接続されたインバータ
とで連繋運転を行ない負荷に電力を供給するインバータ
の出力電力制御装置において、前記インバータと前記負
荷および前記配電系統との間に設けた電力信号変換装置
と、前記インバータおよび前記負荷と前記配電系統の間
に設けた電力方向検出装置と、 前記電力方向検出装置が前記配電系統への電力の逆流を
検出した場合、マイクロプロセッサ・により出力電力設
定値を小さくして、前記インバータの出力電力が前記配
電系統に逆流しないように制御する手段とからなること
を特徴とするインバータの出力電力制御装置。[Claims] ・1. In an inverter output power control device that performs linked operation with a power distribution system and an inverter with a load connected to the output side to supply power to the load, a power signal conversion device provided between the inverter, the load, and the power distribution system. a power direction detection device provided between the inverter, the load, and the power distribution system; when the power direction detection device detects a backflow of power to the power distribution system, a microprocessor determines an output power setting value; An inverter output power control device comprising means for controlling the output power of the inverter to be small so that the output power of the inverter does not flow back into the power distribution system.
JP59065746A 1984-04-04 1984-04-04 Output power controller of inverter Pending JPS60210168A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59065746A JPS60210168A (en) 1984-04-04 1984-04-04 Output power controller of inverter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59065746A JPS60210168A (en) 1984-04-04 1984-04-04 Output power controller of inverter

Publications (1)

Publication Number Publication Date
JPS60210168A true JPS60210168A (en) 1985-10-22

Family

ID=13295888

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59065746A Pending JPS60210168A (en) 1984-04-04 1984-04-04 Output power controller of inverter

Country Status (1)

Country Link
JP (1) JPS60210168A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6292726A (en) * 1985-10-16 1987-04-28 株式会社明電舎 Apparatus for linkage with distribution system
JPS62131726A (en) * 1985-12-03 1987-06-15 株式会社明電舎 Linkage apparatus of solar generator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6292726A (en) * 1985-10-16 1987-04-28 株式会社明電舎 Apparatus for linkage with distribution system
JP2503398B2 (en) * 1985-10-16 1996-06-05 株式会社明電舍 Coordination device with distribution system
JPS62131726A (en) * 1985-12-03 1987-06-15 株式会社明電舎 Linkage apparatus of solar generator
JP2503402B2 (en) * 1985-12-03 1996-06-05 株式会社明電舍 Photovoltaic interconnection device

Similar Documents

Publication Publication Date Title
US3879647A (en) DC to DC converter with regulation having accelerated soft start into active control region of regulation and fast response overcurrent limiting features
US4727469A (en) Control for a series resonant power converter
JPS60210168A (en) Output power controller of inverter
JPS58105315A (en) Controlling method of pwm converter
JPS6358026B2 (en)
JPS6022223A (en) Ac power supply system using solar battery
JPH0241778A (en) Inverter welding machine
JPH06233530A (en) Variable-gain voltage control system of dc/dc converter using detection of load current
JP3678543B2 (en) Control method for self-excited inverter for feeder compensation
JPH0522944A (en) Forward converter
JPS631369A (en) Switching control circuit for dc common converter
JPS6323586A (en) Sepeed controller for induction motor
JPH0456551B2 (en)
JPH0715891A (en) Uninterruptible power supply equipment
JPS61258677A (en) Controlling method for voltage type inverter
JPS62171471A (en) Output voltage ripple reducing device for rectifier
JPH07111742A (en) Catv uninterruptible power source
JPS57177281A (en) Power supplying method using converter
JPS648837A (en) Ac no-break power unit
JPS55150778A (en) Constant output control system for inverter
JPH1014281A (en) Motor controller
JPH0634582B2 (en) Inverter parallel operation controller
JPH0670547A (en) Improving equipment for input power factor of power conversion device
JPS56117578A (en) Controller for current of current type inverter
JPS60226787A (en) Controller of ac motor