JP5355907B2 - Power system stabilization system - Google Patents

Power system stabilization system Download PDF

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JP5355907B2
JP5355907B2 JP2008050334A JP2008050334A JP5355907B2 JP 5355907 B2 JP5355907 B2 JP 5355907B2 JP 2008050334 A JP2008050334 A JP 2008050334A JP 2008050334 A JP2008050334 A JP 2008050334A JP 5355907 B2 JP5355907 B2 JP 5355907B2
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power
power system
frequency
imbalance
demand
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月 照 之 石
崎 保 幸 宮
清 志 楠
曽 俊 幸 阿
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Toshiba Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a power system linkage device between different systems, which can stably control power flows between systems without requiring a large-capacity power storage system in linking a power system independent from a large-scale power system to a large scale power system. <P>SOLUTION: The power system linkage device is arranged between a first power system 1 having a large imbalance in the power demand/supply in the power system and a second power system 2 independent from the first power system and having no large imbalance in the power demand/supply, and operates both power systems in linkage with each other. The power system linkage device includes a control means 4 for controlling power passing between the first and second power systems so as to coincide with a command value, and with a frequency converting means 3 for converting frequency in linkage with each other even if a frequency difference between the first and second power systems fluctuates. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

本発明は、複数の電力系統の連系装置に係わり、とくに異系統間の連系装置に関する。   The present invention relates to an interconnection device for a plurality of electric power systems, and more particularly to an interconnection device between different systems.

例えば、大規模電力系統から独立した第１の電力系統（例えば風力発電装置を有する工場地域での自営線系統など）と、大規模な第２の電力系統との連系運用においては、第１の電力系統内の電力のアンバランスは、連系している大規模な第２の電力系統の調整能力によって補償され、第１の電力系統は結果として安定した運用を実現している。   For example, in the interconnected operation of a first power system independent of a large-scale power system (for example, a private power system in a factory area having a wind power generator) and a large-scale second power system, The power imbalance in the power system is compensated by the adjustment capability of the large-scale second power system connected to the power system. As a result, the first power system achieves stable operation.

しかしながら、近年の電力自由化により、大規模な第２の電力系統から独立した第１の電力系統が増加し始め、また電力託送が行われるに至り、これら独立した第１の電力系統と大規模な第２の電力系統との連系点において、例えば電力潮流を一定とするような、安定した電力の運用を行うことが求められている。   However, with the recent liberalization of electric power, the number of first electric power systems independent from large-scale second electric power systems has started to increase, and power consignment has been carried out. At a connection point with the second power system, for example, it is required to perform stable power operation so that the power flow is constant.

第２の電力系統と連系接続をしない状態での第１の電力系統内の電力需給のアンバランスを平準化する方法に関しては、その系統内の発電機の出力を調整する方法や、それに合わせて電力貯蔵装置を用いることにより電力需給のアンバランスを補償し、安定化する方法が提案されている（例えば特許文献１参照）。   Regarding the method of leveling the power supply and demand imbalance in the first power system in a state where the second power system is not interconnected, the method of adjusting the output of the generator in the system, Thus, there has been proposed a method of compensating and stabilizing an imbalance in power supply and demand by using a power storage device (see, for example, Patent Document 1).

しかし、上述のように大規模電力系統と連系した条件下では、独立した電力系統内の電力のアンバランスがあっても大規模系統によって補償されるため、その制御で用いる物理量の変動が抑制されてしまう。このため、所期の効果が得られず、連系点での通過電力（以下「電力潮流」という）を安定化することはできない。
特許第3108054号公報（１頁７行〜３４行参照） However, under the conditions connected to a large-scale power system as described above, even if there is power imbalance in an independent power system, it is compensated by the large-scale system, so fluctuations in the physical quantities used in the control are suppressed. Will be. For this reason, the desired effect cannot be obtained, and the passing power at the interconnection point (hereinafter referred to as “power flow”) cannot be stabilized.
Japanese Patent No. 3108054 (see page 7, lines 7 to 34)

大規模電力系統から独立した第１の電力系統と大規模電力系統である第２の電力系統とを連系した状態では、独立した第１の電力系統内の電力需給のアンバランスは大規模な第２の電力系統側から補償されるため、この分を含めた電力需給の合計値に関しては独立した第１の電力系統内の電力需給のアンバランスは存在しないことになる。   In a state where the first power system independent of the large-scale power system and the second power system, which is a large-scale power system, are connected, the power supply / demand imbalance in the independent first power system is large. Since compensation is made from the second power system side, there is no power supply / demand imbalance in the independent first power system with respect to the total value of power supply / demand including this amount.

したがって、独立した第１の電力系統内の周波数変動や電力需給のアンバランスに基づく電圧の変動は小さい値に抑制される。このため、特許文献１に記載されたような技術、つまり独立した電力系統内の発電装置のガバナフリー機能（調速機の周波数調整機能によって、系統周波数の変化に追随して出力を敏速に増減させ、系統周波数の安定化に寄与させる運動方法（ＪＩＳ Ｂ０１１９））を利用して独立した系統内で電力需給のアンバランスを補償する技術は、その所期の効果を発揮し得ない。   Therefore, frequency fluctuations in the independent first power system and voltage fluctuations based on electric power supply / demand imbalance are suppressed to a small value. For this reason, the technology as described in Patent Document 1, that is, the governor-free function of the power generator in the independent power system (the frequency adjustment function of the governor quickly increases or decreases the output following the change of the system frequency. Therefore, a technique that compensates for an imbalance in power supply and demand in an independent system by using an exercise method (JIS B0119) that contributes to stabilization of the system frequency cannot exhibit its intended effect.

この結果、連系運用の下でも、独立した系統内においてその電力需給をバランスさせる制御を行うには、独立した系統全体の電力のアンバランス（系統の連系点の電力潮流として現れる）を測定して、電力系統の需給バランスをとる制御を行う必要がある。   As a result, in order to perform control to balance the power supply and demand in an independent system even under interconnected operation, the power imbalance of the entire independent system (appears as the power flow at the connection point of the system) is measured. Therefore, it is necessary to perform control to balance the supply and demand of the power system.

この場合、独立した電力系統の中の電源設備や電力貯蔵装置が連系点から離れている場合や複数の地点に分散している場合には、各発電機や電力貯蔵装置に対して需給バランスを行うための調整量（電力指令値）を高速で伝送する必要がある。しかし、伝送遅れや原動機の応答遅れを考慮すると、連系点での電力潮流の変動を数秒程度の応答性で達成することは現実的には難しい。   In this case, when the power supply facilities and power storage devices in the independent power system are separated from the interconnection point or distributed at multiple points, the supply-demand balance for each generator and power storage device It is necessary to transmit the adjustment amount (power command value) for performing the operation at high speed. However, considering transmission delay and prime mover response delay, it is practically difficult to achieve fluctuations in the power flow at the interconnection point with a response of about several seconds.

そこで、連系点に大型の電力貯蔵装置を設置すれば、伝送遅れも無く、また発電装置の原動機よりも高速な電力応答性を実現できる。しかし、大型電力貯蔵装置は高額であってこれを設けることは費用面で不利であり、また、連系点の場所によっては大規模な電力貯蔵装置の設置が困難な場合も考えられ、実用的には問題がある。   Therefore, if a large-scale power storage device is installed at the interconnection point, there is no transmission delay, and power responsiveness that is faster than that of the generator of the power generation device can be realized. However, large power storage devices are expensive and it is disadvantageous in terms of cost, and depending on the location of the interconnection point, it may be difficult to install a large-scale power storage device. Has a problem.

本発明は上述の点を考慮してなされたもので、大規模電力系統とは独立した電力系統と大規模電力系統とを連系するにつき、大容量の電力貯蔵装置を必要とすることなく系統間電力潮流を安定に制御することができる異系統間電力系統連系装置を提供することを目的とする。   The present invention has been made in consideration of the above-mentioned points, and it is possible to connect a power system independent of a large-scale power system and a large-scale power system without requiring a large-capacity power storage device. It is an object of the present invention to provide an inter-system power grid interconnection device capable of stably controlling an inter-system power flow.

上記目的達成のため、本発明では、
電力系統内の電力需給に大きなアンバランスが存在する第１の電力系統と、前記第１の電力系統とは独立し、前記第１の電力系統より大規模な系統であって、電力需給に大きなアンバランスがない第２の電力系統との間に設置され、前記第１の電力系統と前記第２の電力系統との間の通過電力を指令値と一致するように制御し、さらに前記第１の電力系統と前記第２の電力系統との間に周波数の差が変動する場合にも連系できるように周波数変換する周波数変換手段を持った異系統間電力系統連系システムを有し、
前記第１の電力系統にはガバナフリー機能を有する発電装置が接続され、この発電装置にはガバナフリー機能の応答速度より速い電力変動周波数成分に対して電力変動を平準化するように応答する制御装置が接続された
ことを特徴とする電力系統安定化システム、
を提供する。 In order to achieve the above object, in the present invention,
The first power system having a large imbalance in power supply and demand in the power system and the first power system are independent of the first power system and are larger in scale than the first power system. It is installed between the second power system having no imbalance, and controls the passing power between the first power system and the second power system so as to coincide with the command value, and further the first power system. An inter-system power system interconnection system having a frequency conversion means for frequency conversion so that the system can be interconnected even when a frequency difference fluctuates between the power system of the second power system and the second power system,
Wherein the first power system is connected to the power generation apparatus having a governor free function, control that responds to level the power fluctuations with respect to the fast power fluctuation frequency components than the response speed of the governor free function in the power generating device A power system stabilization system characterized in that the devices are connected ,
I will provide a.

本発明によれば、第１の電力系統の中で電力需給にアンバランスが生じても、異系統間電力系統連系装置が第２の電力系統との系統間の電力潮流を安定（例えば一定）に維持することができる。このため、大型電力貯蔵装置の助けを借りることなく第１および第２の電力系統の系統連系を安定的に維持することができる。   According to the present invention, even if an imbalance occurs in the power supply and demand in the first power system, the inter-system power system interconnection device stabilizes the power flow between the system and the second power system (for example, constant). ) Can be maintained. For this reason, the grid connection of the 1st and 2nd electric power grid | systems can be maintained stably without the assistance of a large sized electric power storage apparatus.

以下、本発明の実施形態について、図面を参照して説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

（実施例１）
まず、図１を用いて実施例１を説明する。この実施例１は、比較的小規模な独立電力系統であって、内部に電力需給のアンバランスを持つ第１の電力系統１と、大規模であって内部の需給バランスが殆どとれている第２の電力系統２と、両系統１，２間の電力潮流を安定に維持する機能、および両系統１，２間の周波数に差が生じても、周波数変換を行って連系を維持する機能を有する異系統間電力系統連系装置３と、この異系統間電力系統連系装置３を上記両機能を果たすように制御する制御装置４とにより構成されている。 Example 1
First, Example 1 will be described with reference to FIG. The first embodiment is a relatively small independent power system, which is a first power system 1 having an imbalance of power supply and demand inside, and a large scale and has an internal power supply and demand balance that is almost balanced. 2 with the power system 2, the ability to maintain the power flow between the two lines 1 and 2 stably, and also a difference in frequency between both systems 1 and 2 occurs, the ability to maintain the interconnection by performing frequency conversion And an inter-system power grid interconnection device 3 and a control device 4 that controls the inter-system power grid interconnection device 3 so as to fulfill both functions described above .

このように構成された実施例１において、第１の電力系統１の中で電力需給にアンバランスが生じても、異系統間電力系統連系装置３は系統間の電力潮流を安定（例えば一定）に維持するため、第２の電力系統２に第１の電力系統１の電力需給のアンバランスが悪影響を与えることを防止できる。   In the first embodiment configured as described above, even if the power supply and demand is unbalanced in the first power grid 1, the inter-system power grid interconnection device 3 stabilizes the power flow between the grids (for example, constant). Therefore, it is possible to prevent the unbalance of the power supply and demand of the first power system 1 from adversely affecting the second power system 2.

この結果、第１の電力系統１の周波数はその電力需給のアンバランスに応じて変動するが、異系統間電力系統連系装置３の周波数変換機能によって周波数差が存在する系統間の連系を維持し続けることができる。   As a result, the frequency of the first power system 1 fluctuates in accordance with the imbalance of the power supply and demand, but the interconnection between the systems where the frequency difference exists due to the frequency conversion function of the power grid interconnection device 3 between different systems. Can continue to maintain.

そして、異系統間電力系統連系装置３の作用によって、電力需給にアンバランスがある比較的小規模な独立の第１の電力系統１と大規模で電力需給に大きなアンバランスのない第２の電力系統２とを、その系統間潮流を安定に維持したまま連系することができる。   And by the effect | action of the power grid connection apparatus 3 between different grids, the 2nd large-scale electric power supply-demand balance with the comparatively small independent 1st power grid 1 which is unbalanced in power supply-demand is large. The power system 2 can be interconnected while maintaining a stable power flow between the systems.

このため、第１の電力系統１に現れるその需給アンバランスに対応した周波数変動が、系統内の周波数変動許容範囲内であれば、周波数差吸収バッファとしての電力貯蔵装置などの追加設備を設ける必要がなく、経済的な独立系統を構成することができる。   For this reason, if the frequency fluctuation corresponding to the supply and demand imbalance appearing in the first power system 1 is within the allowable frequency fluctuation range in the system, it is necessary to provide additional equipment such as a power storage device as a frequency difference absorption buffer. It is possible to construct an economical independent system.

（実施例２）
図２は、本発明の実施例２を示している。なお、実施例１におけると同一の要素には同一の符号を付し、重複する説明は省略する。 (Example 2)
FIG. 2 shows a second embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the same element in Example 1, and the overlapping description is abbreviate | omitted.

この図２に示すように、実施例２は、風力発電機等の制御不可能で特に大きな出力変動を有する発電装置５、第１の電力系統１の中で系統運用者が制御できないような特に大きな変動負荷６、一般家庭のように系統運用者が制御できないが規模的に大きくない変動負荷７、ガバナフリー機能を有する発電装置８、およびその制御装置９を備えている。   As shown in FIG. 2, the second embodiment is particularly incapable of being controlled by the system operator in the first power system 1, the power generation apparatus 5 having a particularly large output fluctuation that cannot be controlled, such as a wind power generator. A large variable load 6, a variable load 7 that cannot be controlled by a system operator but not large in scale like a general household, a power generation device 8 having a governor-free function, and a control device 9 thereof are provided.

第１の電力系統１にガバナフリー機能を持つ発電装置を有する場合に、異系統間電力系統連系装置３を適用する。このように構成された実施例２において、電力系統の連系を維持したままでも、第１の電力系統１の電力需給アンバランスが大きい場合には、その系統内の周波数の変動が大きくなる。   When the first power system 1 has a power generation device having a governor-free function, the inter-system power system interconnection device 3 is applied. In Example 2 configured as described above, even when the power grid is maintained, if the power supply / demand imbalance of the first power grid 1 is large, the frequency fluctuation in the grid becomes large.

発電装置８は、制御装置９により制御されて周波数変動を抑制するガバナフリー機能を持つ。このため、系統の周波数が変動すれば、ガバナフリー機能により周波数変動を抑制する方向に出力調整を自動的に実施することになり、第１の電力系統１内のガバナフリー機能を有効活用することによって電力需給アンバランスを改善することができる。 Power generating device 8 is controlled one lifting suppressing governor free function frequency variations by the control unit 9. For this reason, if the frequency of the system fluctuates, output adjustment is automatically performed in a direction to suppress the frequency fluctuation by the governor-free function, and the governor-free function in the first power system 1 is effectively utilized. Can improve power supply and demand imbalance.

以上のように、第１の電力系統１に大きな電力需給アンバランスがある場合でも、電力系統間の電力潮流は一定に保たれたまま系統連系がなされ、第１の電力系統１にはその需給アンバランスに対応した周波数変動が現れる。このため、系統内のガバナフリー機能を有効活用して系統内の需給アンバランスの改善も併せて実施することができる。   As described above, even when the first power system 1 has a large power supply / demand imbalance, the power flow between the power systems is kept constant, and the grid connection is made in the first power system 1. Frequency fluctuations corresponding to supply and demand imbalance appear. For this reason, it is possible to improve the supply and demand imbalance in the system by effectively utilizing the governor-free function in the system.

この実施例２によれば、系統内のガバナフリー機能を有効活用して系統内の需給アンバランスの改善も併せて実施することができる。このため、その電力需給アンバランスの変化速度がガバナフリーの応答速度近傍以下である場合など、周波数変動を許容値以下に抑制することができる場合は、電力貯蔵装置などの追加設備は不要とすることができ、経済的な独立小規模系統を構成することができる。   According to the second embodiment, it is possible to improve the supply and demand imbalance in the system by effectively utilizing the governor-free function in the system. For this reason, when the frequency fluctuation can be suppressed to an allowable value or less, such as when the rate of change in power supply / demand imbalance is below the governor-free response speed, additional equipment such as a power storage device is unnecessary. It is possible to construct an economical independent small scale system.

（実施例３）
図３は、本発明の実施例３を示している。なお、実施例１，２におけると同一の要素には同一の符号を付し、重複する説明は省略する。 (Example 3)
FIG. 3 shows a third embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the same element in Example 1, 2, and the overlapping description is abbreviate | omitted.

この図３において、第１の小規模独立電力系統の中で特に変動の大きな電源５または負荷６に直接連系し、その電力変動を平準化することを目的とする電力貯蔵装置１０、その制御装置１１である。   In FIG. 3, a power storage device 10 for directly connecting to a power supply 5 or a load 6 having a particularly large fluctuation in the first small-scale independent power system and leveling the fluctuation of the power, and its control Device 11.

実施例２の構成では、第１の電力系統１内の電力需給アンバランスによる変動周波数が発電装置のガバナフリー機能の応答速度より速い場合、ガバナフリー機能による電力需給アンバランスの改善効果は期待できない。   In the configuration of the second embodiment, when the fluctuation frequency due to the power supply / demand imbalance in the first power system 1 is faster than the response speed of the governor-free function of the power generator, the improvement effect of the power supply / demand imbalance by the governor-free function cannot be expected. .

この対策として、実施例３では、制御装置１１が、電力貯蔵装置１０を制御して発電装置８のガバナフリー機能の応答速度より速い電力変動周波数速度成分に対して電力変動を最も平準化するように応答させる。 As a countermeasure against this, in the third embodiment, the control device 11 controls the power storage device 10 so that the power fluctuation is leveled most with respect to the power fluctuation frequency speed component faster than the response speed of the governor-free function of the power generation apparatus 8. To respond.

これにより、第１の電力系統１内における電力需給アンバランスの変動周波数が、発電装置のガバナフリー機能の応答速度より速い場合でも、第１の電力系統１内の電力アンバランスの変動を小さく抑制することができ、系統内の周波数および電力アンバランスに起因した電圧変動を抑制することができる。   Thereby, even when the fluctuation frequency of the power supply / demand imbalance in the first electric power system 1 is faster than the response speed of the governor-free function of the power generation device, the fluctuation of the electric power imbalance in the first electric power system 1 is suppressed to be small. It is possible to suppress voltage fluctuation due to frequency and power imbalance in the system.

制御装置１１は、発電装置のガバナフリー機能が応答できる周波数より高い電力変動の周波数成分に対して、発電装置８のガバナフリー機能の周波数特性を補完するような周波数特性（周波数特性の例は、図４参照）を有するガバナフリー機能を有する。これにより、電力貯蔵装置１０による変動周波数が高い電力変動の平準化が可能になる。   The control device 11 has a frequency characteristic that complements the frequency characteristic of the governor-free function of the power generation device 8 with respect to the frequency component of the power fluctuation higher than the frequency at which the governor-free function of the power generation device can respond (an example of the frequency characteristic is It has a governor-free function having (see FIG. 4). As a result, power fluctuations with high fluctuation frequencies by the power storage device 10 can be leveled.

この実施例３によれば、電力貯蔵装置１０を設けても、電力需給のアンバランスの低周波成分に応じて第１の電力系統１の周波数が変動するため、系統間連系をした状態においても、第１の電力系統１の電力アンバランスのうち変動周波数が低い成分は電力系統全体のガバナフリー機能で平準化できる。
また、実施例３の電力貯蔵装置１０は、電力アンバランスのうち低い周波数成分に対しては応答しないため、その設備容量を分担補償する高い周波数成分の電力変動分を平準化できる容量に限定することができる。 According to the third embodiment, even if the power storage device 10 is provided, the frequency of the first power system 1 fluctuates according to the low frequency component of the unbalanced power supply and demand. However, the component having a low fluctuation frequency in the power imbalance of the first power system 1 can be leveled by the governor-free function of the entire power system.
In addition, since the power storage device 10 according to the third embodiment does not respond to a low frequency component in the power imbalance, the power storage device 10 is limited to a capacity capable of leveling a power fluctuation component of a high frequency component that shares and compensates for the equipment capacity. be able to.

そして、周波数成分が高い電力変動分に対して分散設置した電力貯蔵装置１０で平準化するというように機能分担を行うことが可能になるため、設置費用が高い大型の電力貯蔵装置から、比較的安価な小型の電力貯蔵装置への代替が可能になる。   And since it becomes possible to perform the function sharing such as leveling with the power storage device 10 that is dispersedly installed with respect to the power fluctuation component with a high frequency component, from a large power storage device with high installation cost, An alternative to an inexpensive small power storage device becomes possible.

以上のように、実施例３によれば、系統連系点と発電所との間に伝送装置を設置する必要が無く、システムが簡易で、電力の需要と供給とのアンバランスの調整制御に関して極めて応答性の高い系統連系装置が、経済的な容量の電力貯蔵装置を分散設置した構成で実現することができる。   As described above, according to the third embodiment, there is no need to install a transmission device between the grid connection point and the power plant, the system is simple, and the adjustment control of the unbalance between the supply and demand of power is performed. An extremely responsive grid interconnection device can be realized with a configuration in which power storage devices with economical capacities are distributed and installed.

（実施例４）
図５は、本発明の実施例４を示している。なお、実施例３におけると同一の要素には同一の符号を付し、重複する説明は省略する。 Example 4
FIG. 5 shows a fourth embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the same element in Example 3, and the overlapping description is abbreviate | omitted.

実施例４においては、装置の機器構成は、実施例３の構成（図３）と同一であり、制御装置１１が持つ応答特性を図５に示すものとしている。   In the fourth embodiment, the device configuration is the same as that of the third embodiment (FIG. 3), and the response characteristics of the control device 11 are shown in FIG.

実施例３の構成では、系統の周波数変動には影響を与えないような電力変動に対しても、電力貯蔵装置はその変動を補償しようとする結果、機器の寿命の減少や長期信頼性向上のための容量の増大を招く可能性がある。   In the configuration of the third embodiment, even if the power fluctuation does not affect the frequency fluctuation of the system, the power storage device tries to compensate for the fluctuation. As a result, the lifetime of the device is reduced and the long-term reliability is improved. Therefore, there is a possibility of causing an increase in capacity.

これに対し実施例４では、制御装置１１に高周波成分に応答しない特性を加えることにより、電力貯蔵装置の繰り返し充放電の回数削減による長寿命化や容量の削減を図ることができる。   On the other hand, in Example 4, the characteristic which does not respond to a high frequency component is added to the control apparatus 11, and it can attain the lifetime improvement and reduction of a capacity | capacitance by reduction of the frequency | count of repeated charging / discharging of an electric power storage apparatus.

また、本発明においては、独立系統外への電力変動の流出は、異系統間電力系統連系装置３とその制御装置４とにより抑制されているため、独立系統内の影響を抑制すればよい。   In the present invention, since the outflow of power fluctuations outside the independent system is suppressed by the inter-system power system interconnection device 3 and its control device 4, the influence in the independent system may be suppressed. .

そこで、系統の慣性常数から決定される独立系統内の周波数を変動させる電力変動の最大変動周波数をその応答を抑制するカットオフ周波数として採用することにより、独立電力系統の周波数変動を増加させることなく、電力貯蔵装置の容量の低減と長寿命化を実現することができる。   Therefore, by adopting the maximum fluctuation frequency of the power fluctuation that fluctuates the frequency in the independent system determined from the inertia constant of the system as a cutoff frequency to suppress the response, without increasing the frequency fluctuation of the independent power system. The capacity of the power storage device can be reduced and the life can be extended.

以上のように、実施例４の発明によれば、系統連系点と発電所との間に伝送装置を設置する必要が無く、システムが簡易で、電力の需要と供給とのアンバランスの調整制御に関して極めて応答性の高い系統連系装置を、最も経済的な容量で長寿命な電力貯蔵装置を分散設置した構成で実現することができる。   As described above, according to the invention of the fourth embodiment, there is no need to install a transmission device between the grid connection point and the power plant, the system is simple, and the unbalance between power demand and supply is adjusted. It is possible to realize a grid interconnection device having extremely high responsiveness with respect to control with a configuration in which power storage devices with the most economical capacity and long life are distributedly installed.

本発明の実施例１の構成を示す説明図。BRIEF DESCRIPTION OF THE DRAWINGS Explanatory drawing which shows the structure of Example 1 of this invention. 本発明の実施例２の構成を示す説明図。Explanatory drawing which shows the structure of Example 2 of this invention. 本発明の実施例３の構成を示す説明図。Explanatory drawing which shows the structure of Example 3 of this invention. 本発明における系統連系時の独立系統での発電機ガバナフリー特性と電力貯蔵装置の運転特性との協調動作を示す特性図。The characteristic view which shows the cooperative operation | movement with the generator governor free characteristic in the independent system at the time of the grid connection in this invention, and the operation characteristic of an electric power storage apparatus. 本発明の実施例４における独立系統での電力貯蔵装置の運転特性を示す図。The figure which shows the operating characteristic of the electric power storage apparatus in the independent system in Example 4 of this invention.

符号の説明Explanation of symbols

１…第１の電力系統（独立した電力系統）、２…第２の電力系統（大規模電力系統）、
３…異系統間電力系統連系装置、４…制御装置、５…出力変動する発電装置、
６…大規模変動負荷、７…小規模変動負荷、８…ガバナフリー発電装置、
９…制御装置、１０…電力貯蔵装置、１１…制御装置。 DESCRIPTION OF SYMBOLS 1 ... 1st electric power system (independent electric power system), 2 ... 2nd electric power system (large-scale electric power system),
3 ... Power system interconnection device between different systems, 4 ... Control device, 5 ... Power generation device whose output fluctuates,
6 ... Large-scale variable load, 7 ... Small-scale variable load, 8 ... Governor-free power generator,
9 ... Control device, 10 ... Power storage device, 11 ... Control device.

Claims (2)

電力系統内の電力需給に大きなアンバランスが存在する第１の電力系統と、前記第１の電力系統とは独立し、前記第１の電力系統より大規模な系統であって、電力需給に大きなアンバランスがない第２の電力系統との間に設置され、前記第１の電力系統と前記第２の電力系統との間の通過電力を指令値と一致するように制御し、さらに前記第１の電力系統と前記第２の電力系統との間に周波数の差が変動する場合にも連系できるように周波数変換する周波数変換手段を持った異系統間電力系統連系システムを有し、
前記第１の電力系統にはガバナフリー機能を有する発電装置が接続され、この発電装置にはガバナフリー機能の応答速度より速い電力変動周波数成分に対して電力変動を平準化するように応答する制御装置が接続された
ことを特徴とする電力系統安定化システム。 The first power system having a large imbalance in power supply and demand in the power system and the first power system are independent of the first power system and are larger in scale than the first power system. It is installed between the second power system having no imbalance, and controls the passing power between the first power system and the second power system so as to coincide with the command value, and further the first power system. An inter-system power system interconnection system having a frequency conversion means for frequency conversion so that the system can be interconnected even when a frequency difference fluctuates between the power system of the second power system and the second power system,
Wherein the first power system is connected to the power generation apparatus having a governor free function, control that responds to level the power fluctuations with respect to the fast power fluctuation frequency components than the response speed of the governor free function in the power generating device A power system stabilization system characterized in that devices are connected . 前記第１の電力系統は、前記第１の電力系統の慣性により決まる系統周波数の最大変動速度相当の周波数成分を超える電力変動に対して応答する機能を有する電力貯蔵装置をそなえたことを特徴とする請求項１記載の電力系統安定化システム。 The first power system includes a power storage device having a function of responding to a power fluctuation exceeding a frequency component corresponding to a maximum fluctuation speed of a system frequency determined by the inertia of the first power system. The power system stabilization system according to claim 1.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104779618A (en) * 2015-04-29 2015-07-15 酒泉钢铁(集团)有限责任公司 Coordination control method for generator sets in large power supply to large load direct power supply system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LT5851B (en) * 2011-06-06 2012-07-25 Samuilas Ošerovskis Energy systems connecting method
JP5461632B2 (en) * 2012-08-13 2014-04-02 中国電力株式会社 General power control apparatus and general power control method
US9819185B2 (en) * 2013-10-11 2017-11-14 Edge Electrons Limited Electrical power distribution system for enabling distributed energy generation

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5153234A (en) * 1974-11-05 1976-05-11 Mitsubishi Electric Corp DENRYOKUCHORYUSEIGYOSOCHI
JPS59127531A (en) * 1983-01-12 1984-07-23 株式会社東芝 Power converter
JPH04217820A (en) * 1990-09-12 1992-08-07 Hitachi Ltd Power flow control method, controller and control system
JP2506302B2 (en) * 1992-12-03 1996-06-12 東京瓦斯株式会社 Generator interconnection system
JPH0823634A (en) * 1994-07-04 1996-01-23 Hitachi Ltd Controller for electric power storing device
JPH09182293A (en) * 1995-12-26 1997-07-11 Hitachi Ltd Controller for power converter
JPH09233702A (en) * 1996-02-22 1997-09-05 Mitsubishi Electric Corp Power system stabilizer
JPH11223302A (en) * 1998-02-10 1999-08-17 Babcock Hitachi Kk Automatic control device and method of power generating plant
JP3108054B2 (en) * 1998-06-15 2000-11-13 沖縄電力株式会社 Inverter control method
JP2000125472A (en) * 1998-10-15 2000-04-28 Nissin Electric Co Ltd Power receiving equipment
JP3592565B2 (en) * 1999-01-26 2004-11-24 ティーエム・ティーアンドディー株式会社 Frequency stabilization method and device for power system
JP3583647B2 (en) * 1999-04-01 2004-11-04 株式会社日立製作所 AC interconnection apparatus and control method thereof
JP4155674B2 (en) * 1999-07-22 2008-09-24 関西電力株式会社 Frequency control device for power system including secondary battery
JP4170565B2 (en) * 2000-06-30 2008-10-22 株式会社ダイヘン Power fluctuation smoothing apparatus and control method of distributed power supply system including the same
JP2004215428A (en) * 2003-01-07 2004-07-29 Tokyo Gas Co Ltd Generation and frequency conversion device, generation and frequency conversion equipment, and power trade system
JP2006094684A (en) * 2004-09-27 2006-04-06 Toshiba Mitsubishi-Electric Industrial System Corp Controller of power converter
JP2007166860A (en) * 2005-12-16 2007-06-28 Toshiba Corp Tie-line power flow control device
JP2007318929A (en) * 2006-05-26 2007-12-06 Yanmar Co Ltd Interconnection power generation system
JP5125274B2 (en) * 2007-07-18 2013-01-23 株式会社明電舎 New energy generation system output fluctuation mitigation device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104779618A (en) * 2015-04-29 2015-07-15 酒泉钢铁(集团)有限责任公司 Coordination control method for generator sets in large power supply to large load direct power supply system
CN104779618B (en) * 2015-04-29 2017-03-15 酒泉钢铁(集团)有限责任公司 Control method for coordinating of the big power supply to each generating set in big load direct-furnish electric system

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