JP7695966B2 - 充放電要素の充放電制御方法、及び充放電要素の充放電制御装置 - Google Patents
充放電要素の充放電制御方法、及び充放電要素の充放電制御装置 Download PDFInfo
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Description
図1を参照して、実施形態に係わる充放電制御装置をそれぞれ搭載した電気自動車及び電気自動車が接続された電力系統の構成を説明する。
図2を参照して、電線12に接続される電気自動車EV1~EV3、・・・の各々に搭載された充放電制御装置23及びその周辺装置の構成を説明する。なお、以後、電気自動車EV1~EV3、・・・のうち、電気自動車EV1を例にとり、説明するが、その他の電気自動車EV2、EV3、・・・も同様な構成を有し、同様に動作することができる。
(a)差分電力(ΔP=周波数調整容量の要求値Pfr)を示す情報を取得し、
(b)優先度(β)を算出し、
(c)周波数調整容量の要求値(Pfr)から、優先度(β)に応じた充放電出力特性を決定し、
(d)接続端で測定した系統周波数(f)と基準周波数(fref)との偏差(Δf)から、優先度(β)に応じた充放電出力特性に基づいて要素充放電出力を決定し、
(e)決定した要素充放電出力で充放電するように充放電装置24を制御し、
(f)全充放電出力の理論値と実績値との差分である過不足容量(ΔPfr)を示す情報を受信し、
(g)受信した過不足容量(ΔPfr)から、優先度(β)に応じた充放電出力特性を補正し、そして、
(h)補正後の充放電出力特性に基づいて決定した要素充放電出力で充放電するように充放電装置24を制御する。
以上の実施形態では、周波数調整容量の過不足容量(ΔPfr)を受信装置21が受信した際に、特性補正部36が、受信した周波数調整容量の過不足容量(ΔPfr)に応じて、特性決定部35が決定した電気自動車EV1の充放電の出力特性を補正した。その代わりに、特性補正部36は、受信装置21が受信した過不足容量(ΔPfr)の単位時間(Δt)当たりの時間変化率((ΔPfrt+1-ΔPfrt)/Δt)を算出してもよい。その場合、特性補正部36は、時間変化率((ΔPfrt+1-ΔPfrt)/Δt)に応じて、特性決定部35が決定した電気自動車EV1の充放電の出力特性を補正することができる。
また、特性補正部36は、系統周波数(f)と基準周波数(fref)との偏差(Δf)による、受信装置21が受信した過不足容量(ΔPfr)の変化率を、周波数偏差変化率((ΔPfrf+1-ΔPfrf)/Δf)として算出してもよい。その場合、特性補正部36は、周波数偏差変化率((ΔPfrf+1-ΔPfrf)/Δf)に応じて、特性決定部35が決定した電気自動車EV1の充放電の出力特性を補正することができる。
以上の実施形態及び第1、第2変形例では、情報送信装置16が、周波数調整容量の要求値(Pfr)を、電気自動車EV1~EV3全体に対する総充放電電力に対するものとして、全ての電気自動車EV1~EV3に同報送信した。しかし、周波数調整容量の要求値(Pfr)を、電気自動車EV1~EV3全体に対する総充電電力に対するものと総放電電力に対するものとに分けて、情報送信装置16が全ての電気自動車EV1~EV3に同報送信してもよい。その場合、充放電制御装置23の受信装置21は、充電側の周波数調整容量の要求値と放電側の周波数調整容量の要求値とを、個別にそれぞれ受信する。
以上の実施形態及び第1~第3変形例では、充電側及び放電側の出力特性における出力レンジの上限値を、図5に示すように、各電気自動車EV1、EV2、EV3、・・・の優先度(β)に応じて、さらに高い値に増やすように補正した。しかし、優先度(β)に応じた補正の際に、充電側及び放電側の出力特性における出力レンジの上限値を増やさず、その代わりに下限値を増やしてもよい。
第4変形例においては、優先度(β)が低い電気自動車EV1、EV2、EV3、・・・ほど、充電側の出力特性の傾きが大きくなる。また、充電側の出力レンジの上限値は、優先度(β)が低い電気自動車EV1、EV2、EV3、・・・ほど低くなる。このため、優先度(β)が低いほど充電側の出力特性の下限値は、バッテリ25が暗電流負荷に常時供給するベース電力(Pbase)よりも低い値になる可能性がある。
12 電線
21 受信装置
34 優先度算出部
35 特性決定部
36 特性補正部
38 充放電制御部
EV1、EV2、EV3、・・・ 電気自動車
Claims (7)
- 電力系統の電線に接続された複数の充放電要素に対して同報送信された、前記電力系統の系統周波数に応じた周波数調整容量の要求値を受信し、
前記複数の充放電要素のうち、他の充放電要素の充電又は放電よりも自己の充放電要素の充電又は放電が優先される度合いを示す優先度及び受信した前記要求値に基づいて、前記系統周波数に対する前記自己の充放電要素の充放電出力を示す出力特性を決定し、
前記優先度が高いほど、前記出力特性における出力レンジの上限値又は下限値を増やすように前記出力特性を補正し、
前記電力系統への接続端で測定した前記系統周波数と前記電力系統の基準周波数との偏差及び補正後の前記出力特性に基づいて決定した出力で、前記自己の充放電要素の充電又は放電を行う、
充放電要素の充放電制御方法。 - 決定した前記出力特性で前記複数の充放電要素がそれぞれ充電又は放電しているときの前記系統周波数の実測値と前記基準周波数との偏差に応じた、前記複数の充放電要素全体の充放電出力の理論値と、前記電力系統において測定した前記複数の充放電要素全体の充放電出力の実績値との差分を、前記複数の充放電要素全体に対する同報送信によって受信し、
受信した前記差分が前記理論値よりも前記実績値が高いことを示す場合は前記周波数調整容量が減り、受信した前記差分が前記理論値よりも前記実績値が低いことを示す場合は前記周波数調整容量が増えるように、前記出力特性を補正する、
請求項1に記載の充放電要素の充放電制御方法。 - 受信した前記差分の時間変化率を算出し、算出した前記時間変化率の符号が正の場合は前記周波数調整容量が減り、前記時間変化率の符号が負の場合は前記周波数調整容量が増えるように、前記出力特性を補正する、
請求項2に記載の充放電要素の充放電制御方法。 - 前記系統周波数の実測値と前記基準周波数との前記偏差による、受信した前記差分の変化率である周波数偏差変化率を算出し、算出した前記周波数偏差変化率の符号が正の場合は前記周波数調整容量が減り、前記周波数偏差変化率の符号が負の場合は前記周波数調整容量が増えるように、前記出力特性を補正する、
請求項2に記載の充放電要素の充放電制御方法。 - 充電側と放電側とに分けて同報送信された前記要求値を受信し、受信した充電側及び放電側の前記各要求値に基づいて、前記出力特性の決定及び前記補正を充電側と放電側とに分けてそれぞれ行い、前記補正後の充電側の前記出力特性に基づいて決定した出力で前記自己の充放電要素の充電を行い、前記補正後の放電側の前記出力特性に基づいて決定した出力で前記自己の充放電要素の放電を行う、
請求項1~4のいずれか1項に記載の充放電要素の充放電制御方法。 - 前記複数の充放電要素中の各々の前記出力特性における出力レンジが充電側のみに存在する場合、各々の前記出力レンジの下限値を前記複数の充放電要素の各々の暗電流負荷に常時供給するベース電力以上の値とした前記出力特性を、前記優先度及び受信した前記要求値に基づいて決定する、
請求項1~5のいずれか1項に記載の充放電要素の充放電制御方法。 - 電力系統の電線に接続された複数の充放電要素に対して同報送信された、前記電力系統の系統周波数に応じた周波数調整容量の要求値を受信する受信部と、
前記複数の充放電要素のうち、他の充放電要素の充電又は放電よりも自己の充放電要素の充電又は放電が優先される度合いを示す優先度を算出する優先度算出部と、
前記優先度及び前記要求値に基づいて、前記系統周波数に対する前記自己の充放電要素の充放電出力を示す出力特性を決定する特性決定部と、
前記優先度が高いほど、前記出力特性における出力レンジの上限値又は下限値が上がるように前記出力特性を補正する特性補正部と、
前記電線との接続端で計測した前記系統周波数と前記電力系統の基準周波数との偏差及び補正後の前記出力特性に基づいて決定した出力に、前記電力系統における前記自己の充放電要素の充電又は放電の出力を制御する制御部と、
を備える充放電要素の充放電制御装置。
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| US20240416791A1 (en) * | 2021-11-08 | 2024-12-19 | Nissan Motor Co., Ltd. | Charging/discharging control method and charging/discharging control device |
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| US20240120742A1 (en) | 2024-04-11 |
| EP4293856A4 (en) | 2024-06-05 |
| CN116830413B (zh) | 2024-12-20 |
| JPWO2022172045A1 (ja) | 2022-08-18 |
| EP4293856A1 (en) | 2023-12-20 |
| CN116830413A (zh) | 2023-09-29 |
| EP4293856B1 (en) | 2025-08-20 |
| WO2022172045A1 (ja) | 2022-08-18 |
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