JP5751334B2 - 電源システムおよびその制御方法 - Google Patents
電源システムおよびその制御方法 Download PDFInfo
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- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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- H02J1/08—Three-wire systems; Systems having more than three wires
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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- H02J1/10—Parallel operation of dc sources
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- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1582—Buck-boost converters
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- B60L2210/14—Boost converters
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- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
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- H—ELECTRICITY
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- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/40—The network being an on-board power network, i.e. within a vehicle
- H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
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- Dc-Dc Converters (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Description
図1は、本発明の実施の形態に従う電源システムが適用される電動車両の概略構成図である。
以上のように、本発明の実施の形態による電源システム20では、蓄電装置150が使用される第1のモードと、蓄電装置150が不使用とされる第2のモードとが選択される。この第1および第2のモードのそれぞれについて、制御装置300は、コンバータ110での電圧変換動作を以下のように制御する。
Pb1+Pb2=Pg+Pm ・・・(1)
蓄電装置100,150が並列に使用される状態では、コンバータ110による蓄電装置100の充放電制御に付随して、蓄電装置150の充放電電力Pb2が定まる。すなわち、蓄電装置150の充放電電力Pb2は成り行きで定まる。そのため、第1のモードでは、制御装置300は、電源システム20から負荷10に供給される電力のうち、蓄電装置100が分担する電力(充放電電力Pb1)を所定の電力目標値Pb1*となるように、コンバータ110を制御する。これにより、蓄電装置100の充放電電力Pb1を任意に調整できるため、間接的に蓄電装置150の充放電電力Pb2についても制御することができる。その結果、蓄電装置100,150を協調的に使用して、モータジェネレータMG1,MG2に電力を供給することが可能となる。
ILfb=ILfb(P)+ILfb(I)
=Kp・ΔIL+Σ(Ki・ΔIL) ・・・(2)
式(2)において、ILfb(P)は比例項であり、ILfb(I)は積分項である。また、ΔILは、今回の制御周期における電流偏差であり、Kp,Kiはフィードバックゲインである。
Claims (5)
- 負荷に電力を供給する電源システムであって、
第1の蓄電装置と、
第2の蓄電装置と、
前記負荷に対して入出力される電力を伝達するための電力線と、
前記第1の蓄電装置と前記電力線との間で双方向の直流電圧変換を実行するためのコンバータと、
前記第2の蓄電装置と前記電力線との間に接続された開閉器と、
前記開閉器のオンオフおよび前記コンバータを制御する制御装置とを備え、
前記制御装置は、前記開閉器のオフ時には、前記電力線の電圧値が電圧指令値となるように前記コンバータを電圧制御する一方で、前記開閉器のオン時には、前記第1の蓄電装置の電流値が電流指令値となるように前記コンバータを電流制御するように構成され、
前記制御装置は、
前記負荷の動作状態に応じて、前記開閉器のオンオフを切替える切替部と、
前記電圧指令値に対する前記電力線の電圧値の偏差を積分する積分要素を少なくとも含む電圧フィードバック制御要素の出力に応じて、前記コンバータを電圧制御する電圧制御部と、
前記電流指令値に対する前記第1の蓄電装置の電流値の偏差を積分する積分要素を少なくとも含む電流フィードバック制御要素の出力に応じて、前記コンバータを電流制御する電流制御部とを含み、
前記電圧制御部は、前記開閉器をオンからオフに切替えるときには、前記電圧フィードバック制御要素における積分要素の初期値として、前記電流フィードバック制御要素における積分要素の出力を、前記電流制御部から引き継ぐ、電源システム。 - 前記電流制御部は、前記開閉器をオフからオンに切替えるときには、前記電流フィードバック制御要素における積分要素の初期値として、前記電圧フィードバック制御要素における積分要素の出力を、前記電圧制御部から引き継ぐ、請求項1に記載の電源システム。
- 前記電圧制御部は、
前記電圧指令値に対する前記電力線の電圧値の偏差を比例積分演算し、算出した制御量を前記電流指令値として出力する電圧制御演算部と、
前記電圧制御演算部から出力される前記電流指令値に対する前記第1の蓄電装置の電流値の偏差を比例積分演算し、算出した制御量を前記コンバータへのデューティ比指令値として出力する電流制御演算部とを含み、
前記電流制御演算部は、前記開閉器のオン時には、前記電圧制御演算部から出力される前記電流指令値に代えて、前記第1の蓄電装置が分担すべき電力目標値に応じて設定された前記電流指令値を受けるように構成されることにより、前記電流制御部として機能する、請求項1または2に記載の電源システム。 - 前記負荷は、前記電源システムから供給される電力を受けて車両駆動力を発生する電動機を含み、
前記電圧制御部は、前記電動機のトルクおよび回転数に応じて前記電力線の必要最低電圧を算出するとともに、前記必要最低電圧以上の範囲で前記電圧指令値を設定し、
前記電流制御部は、前記電動機のトルクおよび回転数に応じて前記電動機の必要電力を算出するとともに、前記電動機の必要電力に応じて前記第1の蓄電装置が分担すべき電力目標値を決定し、かつ、前記電力目標値を前記第1の蓄電装置の電圧で除算することにより前記電流指令値を設定する、請求項1に記載の電源システム。 - 負荷に電力を供給する電源システムの制御方法であって、
前記電源システムは、
第1の蓄電装置と、
第2の蓄電装置と、
前記負荷に対して入出力される電力を伝達するための電力線と、
前記第1の蓄電装置と前記電力線との間で双方向の直流電圧変換を実行するためのコンバータと、
前記第2の蓄電装置と前記電力線との間に接続された開閉器とを含み、
前記制御方法は、
前記負荷の動作状態に応じて、前記開閉器のオンオフを切替えるステップと、
前記開閉器のオフ時には、前記電力線の電圧値が電圧指令値となるように前記コンバータを電圧制御するステップと、
前記開閉器のオン時には、前記第1の蓄電装置の電流値が電流指令値となるように前記コンバータを電流制御するステップとを備え、
前記コンバータを電圧制御するステップは、前記電圧指令値に対する前記電力線の電圧値の偏差を積分する積分要素を少なくとも含む電圧フィードバック制御要素の出力に応じて、前記コンバータを電圧制御し、
前記コンバータを電流制御するステップは、前記電流指令値に対する前記第1の蓄電装置の電流値の偏差を積分する積分要素を少なくとも含む電流フィードバック制御要素の出力に応じて、前記コンバータを電流制御し、
前記コンバータを電圧制御するステップは、前記開閉器をオンからオフに切替えるときには、前記電圧フィードバック制御要素における積分要素の初期値として、前記電流フィードバック制御要素における積分要素の出力を、前記コンバータを電流制御するステップから引き継ぐ、電源システムの制御方法。
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