JP2006158069A - Control unit for non-utility generating equipment - Google Patents

Control unit for non-utility generating equipment Download PDF

Info

Publication number
JP2006158069A
JP2006158069A JP2004344043A JP2004344043A JP2006158069A JP 2006158069 A JP2006158069 A JP 2006158069A JP 2004344043 A JP2004344043 A JP 2004344043A JP 2004344043 A JP2004344043 A JP 2004344043A JP 2006158069 A JP2006158069 A JP 2006158069A
Authority
JP
Japan
Prior art keywords
power
power generation
value
private
received
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
Application number
JP2004344043A
Other languages
Japanese (ja)
Other versions
JP4636404B2 (en
Inventor
Toyokuni Kato
豊邦 加藤
Masafumi Kokenawa
雅文 苔縄
Mitsuo Miki
満夫 三木
Kazuhiko Imoto
和彦 井本
Yoshio Fujimoto
喜生 藤本
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.)
Nishishiba Electric Co Ltd
Original Assignee
Nishishiba Electric Co 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 Nishishiba Electric Co Ltd filed Critical Nishishiba Electric Co Ltd
Priority to JP2004344043A priority Critical patent/JP4636404B2/en
Publication of JP2006158069A publication Critical patent/JP2006158069A/en
Application granted granted Critical
Publication of JP4636404B2 publication Critical patent/JP4636404B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Supply And Distribution Of Alternating Current (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control unit for non-utility generating equipment wherein more electric power of an electric power company is utilized during periods of time during which the electric power charge is low and consideration is also given to the fuel cost and maintenance cost of non-utility generating equipment. <P>SOLUTION: The controller for non-utility generating equipment is so constructed that it supplies power to customer load in connection with a utility. In cases where, when the customer load is likely to exceed a contract demand, the non-utility generating equipment is started and so operated that the contract demand is not exceeded, constant generated output control is used. The time for which the non-utility generating equipment is operated is determined by estimating the amount of received power, and, according to the determined time, the non-utility generating equipment is started and stopped so that it is operated at a load factor at which fuel efficiency is enhanced. Thus, it is possible to utilize the electric power of an electric power company as much as possible during the periods of time during which the purchased electricity is inexpensive, and to reduce the fuel cost and maintenance cost of the non-utility generating equipment. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、自家用発電設備の始動停止および発電電力制御を行う制御装置に関する。   The present invention relates to a control device that performs start-stop of a private power generation facility and control of generated power.

系統連系する自家用発電設備の基本的な構成は図５に示すように、発電機１、原動機２、調速機３、発電コントローラ４、自動電圧調整器（ＡＶＲ）５から成り、遮断器６を介して構内系統に接続され需要家電力負荷８（一つの負荷に集約して表記しているが実際は複数の負荷から成る）に電力供給し、さらに遮断器９を介して電力系統と連系されている。また、保護装置として発電機異常を保護する発電機保護装置１０および電力系統との連系保護のための系統連系保護装置１１が設置されている。このような系統連系する自家用発電設備において発電機出力の制御は発電コントローラ４により行われる。発電電力制御は、自家用発電設備電力計１２および受電電力計１３による電力計測値のフィードバック信号と、受電電力設定器３０により設定される受電電力設定値とを用いて、発電コントローラ４が発電電力指令値を決定し、調速機３を動作させ、発電機出力が制御される。ここで、受電電力設定値とは、需要家電力負荷８の必要とする電力に対して電力会社から受電して供給する電力を意味している。発電機出力は、需要家電力負荷８の電力から受電電力設定値を差し引いた電力を出力するように制御することになる。   As shown in FIG. 5, the basic configuration of the grid-connected private power generation facility includes a generator 1, a prime mover 2, a speed governor 3, a power generation controller 4, an automatic voltage regulator (AVR) 5, and a circuit breaker 6 Connected to the premises system via the power supply to supply power to the customer power load 8 (shown collectively as one load, but actually consists of a plurality of loads), and further connected to the power system via the circuit breaker 9 Has been. In addition, a generator protection device 10 for protecting a generator abnormality as a protection device and a grid connection protection device 11 for connection protection with the power system are installed. In such a private power generation facility connected to the grid, the generator output is controlled by the power generation controller 4. In the generated power control, the power generation controller 4 uses the feedback signal of the power measurement value from the private power generation facility power meter 12 and the received power meter 13 and the received power setting value set by the received power setting device 30 to generate a power generation command. The value is determined, the governor 3 is operated, and the generator output is controlled. Here, the received power set value means the power received from the power company and supplied to the power required by the consumer power load 8. The generator output is controlled to output power obtained by subtracting the received power set value from the power of the consumer power load 8.

このとき、需要家電力負荷８に電力供給するに際して、電力会社から受電する電力と自家用発電設備を使っての電力との両方を利用することになるので、より安価な電力を利用することは、重要な検討事項となる。昼間の電力ピーク時（一般的に電力負荷のピークは昼にある）には、電力会社からの購入電力価格が高いため自家用発電設備を出来るだけ運転するように制御する。一方、夜間の購入電力価格は昼間より安価な価格に設定されており、それは自家用発電設備の電力価格よりも安価であることから、出来るだけ電力会社から受電する電力を利用するように制御する。このような背景から、従来、夜間においては基本的に自家用発電設備は停止状態にあり、需要家電力負荷８の電力が電力会社との契約電力を超えそうな場合に自家用発電設備を運転している。   At this time, when power is supplied to the consumer power load 8, both the power received from the power company and the power using the private power generation facility are used. An important consideration. At the time of daytime power peak (generally, the peak of power load is in the daytime), since the price of power purchased from the power company is high, control is performed so that the private power generation facility is operated as much as possible. On the other hand, the purchased power price at night is set to a price cheaper than that of the daytime, and it is cheaper than the power price of the private power generation facility. From such a background, the private power generation facility is basically stopped at night, and the private power generation facility is operated when the power of the consumer power load 8 is likely to exceed the contract power with the power company. Yes.

自家用発電設備の始動停止および発電電力制御には、図５の発電機始動設定器３１からの発電機始動設定値、発電機停止設定器３２からの発電機停止設定値を用いている。図６のフロー図に示すように、判定１の受電電力設定値と発電機始動設定値の合計値に対して受電電力（自家用発電設備は停止中なので、この場合の受電電力は需要家電力負荷８の負荷電力と等しい）が上回ったときに、自家用発電設備を始動する。発電機始動設定値は、発電機の運転に際してエンジンの寿命を考慮して定められている下限の運転出力を考慮して、例えば下限の運転出力が発電機定格出力の３０％であれば、１０％プラスして４０％を発電機始動設定値とする。自家用発電設備を始動後は、受電電力設定値どおりの受電電力となるように自家用発電設備側の出力を変化させる受電電力一定制御で運転する。さらに、判定２の負荷電力（＝受電電力＋発電電力）が受電電力設定値と発電機停止設定値の合計を下回ったときに、自家用発電設備を停止させる。発電機停止設定値は、先に述べた発電機の下限の運転出力値とする。   The generator start setting value from the generator start setting device 31 and the generator stop setting value from the generator stop setting device 32 in FIG. As shown in the flowchart of FIG. 6, the received power with respect to the total value of the received power setting value and the generator start setting value of determination 1 (the private power generation facility is stopped, so the received power in this case is the consumer power load) The power generation facility for private use is started when the load power is equal to 8). For example, if the lower limit operation output is 30% of the generator rated output, the generator start set value is 10% in consideration of the lower limit operation output determined in consideration of the life of the engine when the generator is operated. % Plus 40% is the generator start setting value. After starting the private power generation facility, the operation is performed with the received power constant control that changes the output on the private power generation facility side so that the received power is equal to the received power set value. Furthermore, when the load power of determination 2 (= received power + generated power) falls below the sum of the received power set value and the generator stop set value, the private power generation facility is stopped. The generator stop set value is the lower limit operation output value of the generator described above.

関連する先行技術文献として、商用電力系統と連系して需要家電力負荷に給電する自家用発電設備を備えるシステムにおいて、商用電力系統からの受電電力の制御手法について特許文献１および特許文献２に開示されている。
特開平１１−６９６３４号公報 特開２００１−９５１５７号公報 As related prior art documents, Patent Document 1 and Patent Document 2 disclose a control method of received power from a commercial power system in a system including a private power generation facility that is connected to a commercial power system and supplies power to a consumer power load. Has been.
JP-A-11-69634 JP 2001-95157 A

このように図６のフローに従った従来の自家用発電設備の始動停止および発電電力制御では、電力会社の安価な電力をできるだけ利用したい夜間において、自家用発電設備を始動せざるを得なくなった時にも、昼間と同様に負荷が増えていくと受電電力一定制御で自家用発電設備側の出力を増やす自家用発電設備側を主とする運転を行っていたため、安価な電力会社の電力を充分に利用できていないという問題がある。また、自家用発電設備は低い負荷率で運転することになるので、自家用発電設備にとっては燃費効率が悪く高コストな領域で運転するという問題がある。   As described above, in the conventional start / stop of the private power generation facility and the generated power control according to the flow of FIG. 6, when the private power generation facility has to be started at night when it is desired to use cheap power of the power company as much as possible. As in the daytime, when the load increases, the operation of the private power generation facility side, which increases the output of the private power generation facility side with constant control of the received power, was performed, so the power from cheap power companies could be fully utilized. There is no problem. In addition, since the private power generation facility is operated at a low load factor, there is a problem that the private power generation facility operates in a high-cost area with low fuel efficiency.

さらに、自家用発電設備のメンテナンスコストは、運転時間に伴うので、出来るだけ運転したくない夜間に運転することはメンテナンスコストの点からも問題である。   Furthermore, since the maintenance cost of the private power generation facility is associated with the operation time, it is problematic from the viewpoint of maintenance cost to operate at night when you do not want to operate as much as possible.

本発明は、上記のような事情に鑑みてなされたもので、その課題は電力会社からの電力購入を主とする時間帯における自家用発電設備の始動停止および発電電力制御に関して、電力会社の電力をより多く利用し、自家用発電設備の燃費コストやメンテナンスコストに対しても配慮した自家用発電設備の制御装置を提供することにある。   The present invention has been made in view of the circumstances as described above, and the problem is that the power company's power is related to the start / stop of the private power generation facility and the generated power control in the time zone mainly for power purchase from the power company. The purpose is to provide a control device for a private power generation facility that is used more frequently and takes into account the fuel cost and maintenance cost of the private power generation facility.

前記課題を解決するために、請求項１記載の発明は、電力会社商用電力系統と連系して需要家電力負荷に電力供給する自家用発電設備の制御装置において、
需要家が電力会社から受電する受電電力を検出する受電電力計と、
自家用発電設備からの出力電力を検出する自家用発電設備電力計と、
電力会社から受電する電力と比較するレベル判定値を設定するレベル判定値設定器と、
前記レベル判定値設定器によるレベル判定値と前記受電電力計にて検出された受電電力値とを比較し、前記受電電力値の方が大きい場合に自家用発電設備に始動指令を出力する比較器１と、
ヒステリシス設定器と、
前記レベル判定値設定器によるレベル判定値から前記ヒステリシス設定器によるヒステリシス設定値を減じた値と、前記受電電力計にて検出された受電電力値と前記自家用発電設備電力計にて検出された自家用発電設備発電電力の合計値（負荷電力値）とを比較し、前記合計値の方が小さい場合に自家用発電設備に停止指令を出力する比較器２と、
自家用発電設備の最低発電出力値を設定する最低発電出力設定器とを具備し、
前記比較器１からの出力により自家用発電設備を始動し、前記比較器２からの出力により自家用発電設備を停止し、前記最低発電出力設定器にて設定された最低発電出力値を発電電力目標値（指令値）とすることを特徴とする。 In order to solve the above-mentioned problem, the invention according to claim 1 is directed to a control device for a private power generation facility that supplies power to a consumer power load in conjunction with a utility power grid.
A receiving wattmeter for detecting received power received from a power company by a consumer;
A power generation equipment wattmeter for detecting the output power from the private power generation equipment;
A level judgment value setter for setting a level judgment value to be compared with the power received from the power company;
A comparator 1 that compares a level determination value by the level determination value setting device with a received power value detected by the power receiving wattmeter, and outputs a start command to a private power generation facility when the received power value is larger When,
A hysteresis setter;
A value obtained by subtracting the hysteresis set value by the hysteresis setter from the level decision value by the level decision value setter, the received power value detected by the received power meter, and the private use detected by the private generator facility wattmeter Comparator 2 that compares the total value (load power value) of the power generation facility generated power and outputs a stop command to the private power generation facility when the total value is smaller;
A minimum power generation output setting device for setting a minimum power generation output value of a private power generation facility;
The private power generation facility is started by the output from the comparator 1, the private power generation facility is stopped by the output from the comparator 2, and the minimum power generation output value set by the minimum power generation output setting device is set as the generated power target value. (Command value).

請求項２記載の発明は、電力会社商用電力系統と連系して需要家電力負荷に電力供給する自家用発電設備の制御装置において、
前記受電電力計と、規定された３０分間で需要家が電力会社から受電する受電電力量を検出する受電電力量計と、
自家用発電設備電力計と、規定された３０分間における自家用発電設備からの出力電力量を検出する自家用発電設備電力量計と、
規定された３０分間の最初の５分間程度から１０分間程度にて前記受電電力量計で検出される受電電力量から規定された３０分間における受電電力量を予測する受電電力量予測手段と、
前記受電電力量予測手段により予測された３０分間の受電電力量予測値を２倍することで算出される３０分間平均の受電電力予測値とレベル判定値設定器によるレベル判定値とを比較し、前記受電電力量予測値の方が大きい場合に自家用発電設備に始動指令を出力する比較器と、
自家用発電設備の発電出力値を設定する発電出力設定器と、
前記受電電力量予測手段により予測された３０分間における受電電力量から前記レベル判定値設定器によるレベル判定値を２で除した値を減じた結果を前記発電出力設定器による発電出力値で除することで自家用発電設備が前記需要家電力負荷に電力供給する時間間隔を導出する負荷給電時間設定手段と、
前記負荷給電時間設定手段により設定された時間間隔で自家用発電設備が前記需要家電力負荷に電力供給すると自家用発電設備に停止指令を出力するタイマーとを具備し、
前記比較器からの出力により自家用発電設備を始動し、前記発電出力設定器にて設定された発電出力値を発電電力目標値（指令値）として運転し、前記タイマーからの出力により自家用発電設備を停止することを特徴とする。 The invention according to claim 2 is a control device for a private power generation facility that supplies power to a consumer power load linked to a commercial power system of an electric power company.
The received power meter, and a received power meter that detects a received power amount that a consumer receives from a power company in a specified 30 minutes;
A private power generation facility watt-hour meter, and a private power generation facility watt-hour meter that detects the amount of output power from the private power generation facility for a specified 30 minutes;
A received power amount predicting means for predicting a received power amount in a specified 30 minutes from a received power amount detected by the received power meter in about 10 minutes from the first 5 minutes of the specified 30 minutes;
Comparing the 30-minute average received power predicted value calculated by doubling the received power predicted value for 30 minutes predicted by the received power amount predicting means with the level determination value by the level determination value setter; A comparator that outputs a start command to a private power generation facility when the received power amount prediction value is greater;
A power generation output setting device for setting a power generation output value of a private power generation facility;
The result obtained by subtracting the value obtained by dividing the level judgment value by the level judgment value setter by 2 from the received power quantity for 30 minutes predicted by the received power quantity prediction means is divided by the power generation output value by the power generation output setter. Load power supply time setting means for deriving a time interval in which the private power generation facility supplies power to the consumer power load,
A timer for outputting a stop command to the private power generation facility when the private power generation facility supplies power to the consumer power load at a time interval set by the load power supply time setting means,
A private power generation facility is started by the output from the comparator, the power generation output value set by the power generation output setting device is operated as a generated power target value (command value), and the private power generation facility is operated by the output from the timer. It is characterized by stopping.

本発明によると、電力会社の商用電力系統と連系して需要家電力負荷に電力供給する自家用発電設備において、電力会社からの購入電力が安価な時間帯は出来るだけ電力会社の電力を利用しつつ、自家用発電設備においても燃費コストやメンテナンスコストの低減を可能とする自家用発電設備の始動停止および発電電力制御を行う制御装置を提供することができる。   According to the present invention, in a private power generation facility that supplies power to a consumer power load in conjunction with a commercial power system of an electric power company, the electric power of the electric power company is used as much as possible when the purchased power from the electric power company is inexpensive. On the other hand, it is possible to provide a control device for starting and stopping the private power generation facility and controlling the generated power, which enables reduction in fuel cost and maintenance cost even in the private power generation facility.

本発明を実施するための最良の形態を図を参照して説明する。
（第１実施形態）
図１は、本発明の第１実施形態の構成図であり、従来の自家用発電設備を示す図５と異なる構成は、発電コントローラ４への入力として、受電電力設定器３０からの受電電力設定値と発電機始動設定器３１からの発電機始動設定値および発電機停止設定器３２は用いずに、レベル判定値設定器３６からのレベル判定値とヒステリシス設定器３３からのヒステリシス設定値を用いている点と、自家用発電設備始動後は、最低発電出力設定器３４による最低発電出力設定値を用いる点である。 The best mode for carrying out the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a configuration diagram of the first embodiment of the present invention. A configuration different from FIG. 5 showing a conventional private power generation facility is a received power set value from a received power setting device 30 as an input to the power generation controller 4. The generator start setting value from the generator start setting device 31 and the generator stop setting device 32 are not used, but the level determination value from the level determination value setting device 36 and the hysteresis setting value from the hysteresis setting device 33 are used. And the point where the minimum power generation output set value by the minimum power generation output setting unit 34 is used after the private power generation facility is started.

図２は第１実施形態における自家用発電設備の始動停止を示すフロー図である。
図６の従来の自家用発電設備の始動停止のフロー図と異なり、自家用発電設備の始動の判定を下記（１）式で行っており、また自家用発電設備の停止の判定を下記（２）式で行っている。（１）式は比較器１の働きを有し、（２）式は比較器２の働きを有している。
受電電力＞レベル判定値 …（１）
（レベル判定値−ヒステリシス設定値）＞負荷電力 …（２） FIG. 2 is a flowchart showing start and stop of the private power generation facility in the first embodiment.
Unlike the conventional flow chart for starting and stopping the private power generation facility shown in FIG. 6, the determination of the start of the private power generation facility is performed by the following equation (1), and the determination of the stop of the private power generation facility is performed by the following equation (2). Is going. The expression (1) has the function of the comparator 1, and the expression (2) has the function of the comparator 2.
Received power> level judgment value (1)
(Level judgment value-Hysteresis set value)> Load power (2)

本実施形態では、（１）式のように受電電力がレベル判定値を上回ったときに自家用発電設備を始動する。始動後は、最低発電出力設定器３４による最低発電出力設定値を用いて発電電力一定制御で運転し、（２）式のように負荷電力がレベル判定値からヒステリシス設定値分少ない値よりも下回ったときに自家用発電設備を停止する。最低発電出力設定値は、これ以下ではエンジンの寿命の点から発電機を運転させない限界を示しているもので、図５における発電機停止設定器３２による発電機停止設定値と同じ値となる。ヒステリシス設定値の意味は、負荷電力が十分に低下した場合に自家用発電設備を停止させることで、停止からすぐに始動となることを防止することにある。   In the present embodiment, the private power generation facility is started when the received power exceeds the level determination value as expressed by equation (1). After start-up, operation is performed with constant generated power control using the minimum generated output set value by the minimum generated output setter 34, and the load power is lower than the value determined by the hysteresis set value from the level judgment value as shown in equation (2). The private power generation equipment will be stopped when Below this, the minimum power generation output set value indicates the limit at which the generator is not operated from the viewpoint of the life of the engine, and is the same value as the generator stop set value by the generator stop setter 32 in FIG. The meaning of the hysteresis set value is to prevent starting immediately after the stop by stopping the private power generation facility when the load power is sufficiently reduced.

本実施形態によると、発電機は最低発電出力一定で運転しているので、負荷電力の変動分は電力会社の電力で賄うことになり、電力会社の電力の利用分が増加し、従来の方式よりもより効果的（経済的）である。   According to this embodiment, since the generator is operating at a constant minimum power output, the fluctuation of the load power will be covered by the power company's power, the power company's power usage will increase, and the conventional method More effective (economic) than

（第２実施形態）
図３は本発明の第２実施形態の構成図である。
図３に示すように、本実施形態が図１の第１実施形態と異なる構成は、発電コントローラ４に対してレベル判定値設定器３６からのレベル判定値と発電出力設定器３５からの発電出力設定値を入力し、発電コントローラ４の内部では図４に示す処理ブロックを構築している。また、自家用発電設備からの出力電力量を検出する自家用発電設備電力量計１４と電力会社からの受電電力量を検出する受電電力量計１５を設けている点である。なお、最低発電出力設定器は設置していない。 (Second Embodiment)
FIG. 3 is a block diagram of the second embodiment of the present invention.
As shown in FIG. 3, this embodiment is different from the first embodiment of FIG. 1 in that the level judgment value from the level judgment value setting unit 36 and the power generation output from the power generation output setting unit 35 are compared with the power generation controller 4. A set value is input, and a processing block shown in FIG. In addition, a private power generation equipment watt-hour meter 14 that detects the amount of output power from the private power generation equipment and a received power watt-hour meter 15 that detects the amount of power received from the power company are provided. There is no minimum power output setting device.

図４は本発明に係る自家用発電設備の始動停止の処理を示す構成図である。
図に示すように、受電電力量計１５からの受電電力量（自家用発電設備は運転していないので、このとき受電電力量は負荷電力量と等しい）の信号を受け取り、受電電力量予測手段２１で当該３０分区間の受電電力量を予測する。予測は例えば、当該３０分区間の最初の１０分間の受電電力量から当該３０分全体の受電電力量を予測する。この場合、３倍して受電電力量予測値とすれば良い。さらに、これを２倍することで３０分区間平均の受電電力量予測値とみなし、レベル判定値と比較器２２にて比較し、受電電力量予測値の方が大きい場合に始動指令を出力する。また、受電電力量の予測値からレベル判定値を２で除した値を減じて自家用発電設備側にて賄う電力量とし、その電力量を発電出力設定値で除することで自家用発電設備から需要家電力負荷に電力供給する時間を設定する負荷給電時間設定手段を設ける。タイマー２３にて自家用発電設備から電力供給する時間が経過すれば、停止指令を出力する。スイッチ２４は、始動指令が出力された後、自家用発電設備から需要家電力負荷８に電力供給する時間をタイマー２３にセットするために設けている。すなわち、タイマーは負荷給電時間設定手段により設定された時間間隔で自家用発電設備が需要家電力負荷に電力供給すると自家用発電設備に停止指令を出力する。 FIG. 4 is a configuration diagram showing a start / stop process of the private power generation facility according to the present invention.
As shown in the figure, a signal of the received power amount from the received power meter 15 (the private power generation facility is not in operation, so the received power amount is equal to the load power amount at this time) is received, and the received power amount prediction means 21 To predict the amount of received power in the 30-minute section. For example, the prediction is made by predicting the received power amount for the entire 30 minutes from the received power amount for the first 10 minutes of the 30-minute section. In this case, the received power amount prediction value may be multiplied by three. Furthermore, by doubling this, it is regarded as the predicted received power amount of the average for 30 minutes, compared with the level determination value by the comparator 22, and a start command is output when the predicted received power amount is larger. . In addition, subtracting the level judgment value divided by 2 from the predicted value of the received power amount to obtain the amount of power to be covered on the private power generation facility side, and dividing that power amount by the power generation output setting value will result in demand from the private power generation facility. Load power supply time setting means for setting the time for supplying power to the home power load is provided. When the timer 23 passes the time for supplying power from the private power generation facility, a stop command is output. The switch 24 is provided in order to set the timer 23 with a time for supplying power to the consumer power load 8 from the private power generation facility after the start command is output. That is, the timer outputs a stop command to the private power generation facility when the private power generation facility supplies power to the consumer power load at the time interval set by the load power supply time setting means.

発電出力設定値を自家用発電設備の燃費効率の良い高負荷率となる設定とすることで、自家用発電設備の燃費の改善になる。また、燃費の悪い低負荷率で３０分運転する場合よりも短時間の運転で済むため、自家用発電設備のトータル運転時間の短縮にも繋がり、トータル運転時間に基づき行うメンテナンスのタイミングを遅らせることが出来るのでメンテナンスコスト低減にも効果がある。   By setting the power generation output set value to a high load factor with good fuel efficiency of the private power generation facility, the fuel efficiency of the private power generation facility is improved. In addition, since it takes only a short time to drive for 30 minutes at a low load factor with low fuel consumption, it leads to a reduction in the total operation time of the private power generation facility, and the timing of maintenance performed based on the total operation time can be delayed. This is effective in reducing maintenance costs.

本実施形態は、電力会社との契約電力が規定された３０分毎の受電電力量の値を２倍することで得られる３０分区間の平均の電力値に基づき決定される点に着目し、３０分の受電電力量が契約電力相当分電力量を超過しなければ良いことになるので、自家用発電設備を燃費効率の良い高負荷率で短時間運転することで負荷電力の増加に対応しつつ、自家用発電設備の発電コストを抑制するものである。   This embodiment pays attention to the point determined based on the average power value of the 30-minute section obtained by doubling the value of the received power amount every 30 minutes in which the contract power with the power company is defined, Since the amount of power received for 30 minutes does not exceed the amount equivalent to the amount of contracted power, it would be good to operate the private power generation facility for a short time at a high load factor with good fuel efficiency while responding to the increase in load power. The power generation cost of private power generation facilities is suppressed.

本発明の第１実施形態における電力会社商用系統と連系する自家用発電設備の構成図。The block diagram of the private power generation equipment connected with the electric power company commercial system in 1st Embodiment of this invention. 図１における自家用発電設備の始動停止を示すフロー図。The flowchart which shows the start stop of the private power generation equipment in FIG. 本発明の第２実施形態における電力会社商用系統と連系する自家用発電設備の構成図。The block diagram of the private power generation equipment connected with the electric power company commercial system in 2nd Embodiment of this invention. 図３における自家用発電設備の始動停止を示す構成図。The block diagram which shows the start stop of the private power generation equipment in FIG. 従来の電力会社商用系統と連系する自家用発電設備の構成図。The block diagram of the private power generation equipment connected with the conventional electric power company commercial system. 従来の自家用発電設備の始動停止を示すフロー図。The flowchart which shows the start-stop of the conventional private power generation equipment.

符号の説明Explanation of symbols

１…発電機、２…原動機、３…調速機、４…発電コントローラ、５…ＡＶＲ、６，７，９…遮断器、８…需要家電力負荷、１０…発電機保護装置、１１…系統連系保護装置、１２…自家用発電設備電力計、１３…受電電力計、１４…自家用発電設備電力量計、１５…受電電力量計、２１…受電電力量予測手段、２２…比較器、２３…タイマー、２４…スイッチ、３０…受電電力設定器、３１…発電機始動設定器、３２…発電機停止設定器、３３…ヒステリシス設定器、３４…最低発電出力設定器、３５…発電出力設定器、３６…レベル判定値設定器。   DESCRIPTION OF SYMBOLS 1 ... Generator, 2 ... Prime mover, 3 ... Speed governor, 4 ... Power generation controller, 5 ... AVR, 6, 7, 9 ... Circuit breaker, 8 ... Consumer power load, 10 ... Generator protection device, 11 ... System Interconnection protection device, 12 ... private power generation equipment watt meter, 13 ... received power meter, 14 ... private power generation equipment watt meter, 15 ... received power meter, 21 ... received power amount prediction means, 22 ... comparator, 23 ... Timer ... 24 ... Switch, 30 ... Received power setting device, 31 ... Generator start setting device, 32 ... Generator stop setting device, 33 ... Hysteresis setting device, 34 ... Minimum power generation output setting device, 35 ... Power generation output setting device, 36: Level judgment value setting device.

Claims (2)

電力会社商用電力系統と連系して需要家電力負荷に電力供給する自家用発電設備の制御装置において、
需要家が電力会社から受電する受電電力を検出する受電電力計と、
自家用発電設備からの出力電力を検出する自家用発電設備電力計と、
電力会社から受電する電力と比較するレベル判定値を設定するレベル判定値設定器と、
前記レベル判定値設定器によるレベル判定値と前記受電電力計にて検出された受電電力値とを比較し、前記受電電力値の方が大きい場合に自家用発電設備に始動指令を出力する比較器１と、
ヒステリシス設定器と、
前記レベル判定値設定器によるレベル判定値から前記ヒステリシス設定器によるヒステリシス設定値を減じた値と、前記受電電力計にて検出された受電電力値と前記自家用発電設備電力計にて検出された自家用発電設備発電電力の合計値とを比較し、前記合計値の方が小さい場合に自家用発電設備に停止指令を出力する比較器２と、
自家用発電設備の最低発電出力値を設定する最低発電出力設定器とを具備し、
前記比較器１からの出力により自家用発電設備を始動し、前記比較器２からの出力により自家用発電設備を停止し、前記最低発電出力設定器にて設定された最低発電出力値を発電電力目標値（指令値）とすることを特徴とする自家用発電設備の制御装置。 In the control device for private power generation facilities that supply power to the consumer power load in conjunction with the commercial power grid of the power company,
A receiving wattmeter for detecting received power received from a power company by a consumer;
A power generation equipment wattmeter for detecting the output power from the private power generation equipment;
A level judgment value setter for setting a level judgment value to be compared with the power received from the power company;
A comparator 1 that compares a level determination value by the level determination value setting device with a received power value detected by the power receiving wattmeter, and outputs a start command to a private power generation facility when the received power value is larger When,
A hysteresis setter;
A value obtained by subtracting the hysteresis set value by the hysteresis setter from the level decision value by the level decision value setter, the received power value detected by the received power meter, and the private use detected by the private generator facility wattmeter Comparator 2 that compares the total value of the power generated by the power generation facility and outputs a stop command to the private power generation facility when the total value is smaller;
A minimum power generation output setting device for setting a minimum power generation output value of a private power generation facility;
The private power generation facility is started by the output from the comparator 1, the private power generation facility is stopped by the output from the comparator 2, and the minimum power generation output value set by the minimum power generation output setting device is set as the generated power target value. (Command value) A control device for private power generation equipment. 電力会社商用電力系統と連系して需要家電力負荷に電力供給する自家用発電設備の制御装置において、
前記受電電力計と、規定された３０分間で需要家が電力会社から受電する受電電力量を検出する受電電力量計と、
自家用発電設備電力計と、規定された３０分間における自家用発電設備からの出力電力量を検出する自家用発電設備電力量計と、
規定された３０分間の最初の５分間程度から１０分間程度にて前記受電電力量計で検出される受電電力量から規定された３０分間における受電電力量を予測する受電電力量予測手段と、
前記受電電力量予測手段により予測された３０分間の受電電力量予測値を２倍することで算出される３０分間平均の受電電力予測値とレベル判定値設定器によるレベル判定値とを比較し、前記受電電力量予測値の方が大きい場合に自家用発電設備に始動指令を出力する比較器と、
自家用発電設備の発電出力値を設定する発電出力設定器と、
前記受電電力量予測手段により予測された３０分間における受電電力量から前記レベル判定値設定器によるレベル判定値を２で除した値を減じた結果を前記発電出力設定器による発電出力値で除することで自家用発電設備が前記需要家電力負荷に電力供給する時間間隔を導出する負荷給電時間設定手段と、
前記負荷給電時間設定手段により設定された時間間隔で自家用発電設備が前記需要家電力負荷に電力供給すると自家用発電設備に停止指令を出力するタイマーとを具備し、
前記比較器からの出力により自家用発電設備を始動し、前記発電出力設定器にて設定された発電出力値を発電電力目標値として運転し、前記タイマーからの出力により自家用発電設備を停止することを特徴とする自家用発電設備の制御装置。

In the control device for private power generation facilities that supply power to the consumer power load in conjunction with the commercial power grid of the power company,
The received power meter, and a received power meter that detects a received power amount that a consumer receives from a power company in a specified 30 minutes;
A private power generation facility watt-hour meter, and a private power generation facility watt-hour meter that detects the amount of output power from the private power generation facility for a specified 30 minutes;
A received power amount predicting means for predicting a received power amount in a specified 30 minutes from a received power amount detected by the received power meter in about 10 minutes from the first 5 minutes of the specified 30 minutes;
Comparing the 30-minute average received power predicted value calculated by doubling the received power predicted value for 30 minutes predicted by the received power amount predicting means with the level determination value by the level determination value setter; A comparator that outputs a start command to a private power generation facility when the received power amount prediction value is greater;
A power generation output setting device for setting a power generation output value of a private power generation facility;
The result obtained by subtracting the value obtained by dividing the level judgment value by the level judgment value setter by 2 from the received power quantity for 30 minutes predicted by the received power quantity prediction means is divided by the power generation output value by the power generation output setter. Load power supply time setting means for deriving a time interval in which the private power generation facility supplies power to the consumer power load,
A timer for outputting a stop command to the private power generation facility when the private power generation facility supplies power to the consumer power load at a time interval set by the load power supply time setting means,
Starting the private power generation facility by the output from the comparator, operating the power generation output value set by the power generation output setting device as the generated power target value, and stopping the private power generation facility by the output from the timer. A control device for private power generation facilities.

JP2004344043A 2004-11-29 2004-11-29 Control equipment for private power generation facilities Active JP4636404B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004344043A JP4636404B2 (en) 2004-11-29 2004-11-29 Control equipment for private power generation facilities

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004344043A JP4636404B2 (en) 2004-11-29 2004-11-29 Control equipment for private power generation facilities

Publications (2)

Publication Number Publication Date
JP2006158069A true JP2006158069A (en) 2006-06-15
JP4636404B2 JP4636404B2 (en) 2011-02-23

Family

ID=36635680

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004344043A Active JP4636404B2 (en) 2004-11-29 2004-11-29 Control equipment for private power generation facilities

Country Status (1)

Country Link
JP (1) JP4636404B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008086163A (en) * 2006-09-28 2008-04-10 Osaka Gas Co Ltd Demand controller
CN103259288A (en) * 2013-05-13 2013-08-21 国家电网公司 Economical evaluation method for conventional power source to carry out wind electricity peak-load regulation
CN105514971A (en) * 2015-11-02 2016-04-20 湘潭大学 Flow calculation method suitable for microgrids in various operation modes
JP7041777B1 (en) * 2021-07-21 2022-03-24 東京瓦斯株式会社 Controls, power generation systems, and control programs
WO2023095977A1 (en) * 2021-11-26 2023-06-01 옴니시스템 주식회사 Power failure detection and switching system in urban building environment

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05146092A (en) * 1991-09-24 1993-06-11 Fuji Electric Co Ltd Charge control circuit for multiple charger standby redundant operation system uninterruptible power supply
JPH06284572A (en) * 1993-03-31 1994-10-07 Nisshin Steel Co Ltd Controlling method for power demand
JP2001095157A (en) * 1999-09-20 2001-04-06 Taiyo Electric Mfg Co Ltd Received power controller
JP2001197662A (en) * 1999-10-25 2001-07-19 Soshiodaiya Systems Kk Power-calculating apparatus, power-calculating method and power information processing system
JP2004112993A (en) * 2002-08-29 2004-04-08 Terasaki Electric Co Ltd Demand controller

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05146092A (en) * 1991-09-24 1993-06-11 Fuji Electric Co Ltd Charge control circuit for multiple charger standby redundant operation system uninterruptible power supply
JPH06284572A (en) * 1993-03-31 1994-10-07 Nisshin Steel Co Ltd Controlling method for power demand
JP2001095157A (en) * 1999-09-20 2001-04-06 Taiyo Electric Mfg Co Ltd Received power controller
JP2001197662A (en) * 1999-10-25 2001-07-19 Soshiodaiya Systems Kk Power-calculating apparatus, power-calculating method and power information processing system
JP2004112993A (en) * 2002-08-29 2004-04-08 Terasaki Electric Co Ltd Demand controller

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008086163A (en) * 2006-09-28 2008-04-10 Osaka Gas Co Ltd Demand controller
CN103259288A (en) * 2013-05-13 2013-08-21 国家电网公司 Economical evaluation method for conventional power source to carry out wind electricity peak-load regulation
CN105514971A (en) * 2015-11-02 2016-04-20 湘潭大学 Flow calculation method suitable for microgrids in various operation modes
JP7041777B1 (en) * 2021-07-21 2022-03-24 東京瓦斯株式会社 Controls, power generation systems, and control programs
WO2023095977A1 (en) * 2021-11-26 2023-06-01 옴니시스템 주식회사 Power failure detection and switching system in urban building environment

Also Published As

Publication number Publication date
JP4636404B2 (en) 2011-02-23

Similar Documents

Publication Publication Date Title
JP6002196B2 (en) Load control device
JP5738212B2 (en) Power storage type power generation system
WO2014208059A1 (en) Power adjustment device, power adjustment method, power adjustment system, power storage device, server, program
KR20060113772A (en) Device for covering the peak load
JP2008141924A (en) On-vehicle battery charger, on-vehicle battery apparatus and on-vehicle battery charging method
JP3726265B2 (en) Distributed home power supply device using DC interconnection and control method thereof
JP2011078215A (en) Power distribution system
JP2008236897A (en) Operation situation detection apparatus of distributed power supply, watthour meter and controller of distribution system
WO2014167928A1 (en) Storage battery charge/discharge control device and storage battery charge/discharge control method
JP2008017652A (en) Power supply system
JP2011250673A (en) Energy controller and control method
US10749346B2 (en) Power management system
JP3759151B1 (en) Power storage system
JP2004194485A (en) Energy system
JP3775134B2 (en) Private power generation facilities
JP6414870B1 (en) Reverse power flow prevention type self-consumption renewable energy storage control system
JP2007082311A (en) Method and device for improving operation efficiency of generator
JPWO2004100337A1 (en) Power supply device including grid interconnection inverter
JP4636404B2 (en) Control equipment for private power generation facilities
JP6187920B2 (en) Power supply control device and power distribution system
JP2003153448A (en) Power generation system
JP3827676B2 (en) Power storage system
JP2002298887A (en) Power management device
JP5875964B2 (en) Power feeding system and power feeding method
AU2021206016A1 (en) Method and system for controlling an electrical installation

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20071128

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20071128

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20090713

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20090818

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20091016

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100817

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20101007

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20101026

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20101112

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131203

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Ref document number: 4636404

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150