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力 00 年 -4 流輪流路力 Impact of HV -AC and DC Line Faults on Stressing a Marine Current urbine-generator Set * 呂 * 林 * + # Jong-Ian sai Guang Ching Leu Sharon Lin Rong-Ching Wu Ching-Hong Wang * + # *Chunghwa elecommunication Laboratories, Department of +Electrical Engineering+, #Electronic Engineering +I-Shou University, #Kao Yuan University aiwan, R.O.C. t0679@gmail.com :.MW 流 007 年流輪若路流輪 ( 葉 /) 力力勞流輪度力了路流連流流流輪葉流流輪流流 Abstract: he marine current resource owns the distinct advantages of plentiful, highly stable, and predictable characteristics. he.mw marine current turbine (MC) has been successful commissioned and connected to grid by 007. If the grid-connected MC generator is subjected to the violent network faults, the over-current in armature winding may give rise to over-stresses on turbine components, namely blades and high/low speed shafts, which even lead to fatigue life expenditure. For the ocean power plant planner, it is necessary to deeply investigate the transient stability and torsional stresses on MC. his project simulates a line fault respectively occur at HVDC and HVAC transmission systems. It is found that the HVDC system may impose higher impact on MC shafts and blades owing to the line faults. Keywords: Marine current turbine, Shaft, orsional vibration, High voltage AC (HVAC) transmission, High voltage DC (HVDC) transmission I. 例益流度力流 8 MW 流輪葉力 [] : 流量 60GW 量 (4GW) 流流流 (ocean current) 兩流 tidal current 流流流流流流流流流 MC 007 年 SeaGen 立.MW 流北蘭 (Strangford Lough) 聯 Lunar Energy 007 年 E.ON 8 MW 流 MW Rotech idal urbine[] Nova Scotia 力 009 年 OpenHydro MW 流聯 [4] 來流列流輪流 (Farm) 流量 [] 輪葉 Cp 量 [5-6] 度 [7] 流度 [8] 見流理力力流量力 [] 說車 (underwater windmill) IEC [] 力輪度類不兩路流輪力 IEC 度律參 II. A. (a) 流輪路流 HVAC (b) 流輪流 (bipolar) DC 流流 HVDC (c) 流 (Fixed Speed)(Horizontal axis) 流輪 ( 葉連葉 - 輪 -) 籠 44

480V 數六率.5MW 00 RPM 連 HVAC 0 kv 5km 路連 HVDC 5 kv 流 - 流 ±0kV6.7kA( 4MW) 6-pulse HV DC 滑 5km 流連率參 B. Matlab Sim-Power System (SPS) Asynchronous Machine in pu unitsquirrel Cage YgYg ri-phase 流 DYg- ri-phase HVAC PI ri-phase HVDC 參數滑 L HVDC 流濾流流 (Current Regulator) VDCOL(voltage dependent current-order limit) 流 hree-phase programmable voltage source 串聯 R-L 路 SPS 流 0 hree-phasee series RLC.5MW*, 00rpm IG IG C comp CB L (a) (b) L fault CB 力 00 年 -4 load 流 SPS 籠輪 (Fixed Speed) 量 -- 立 C. 流率流輪流力度 [5] 流率 () Pm = ρ AVtide ρ 流度 A 流流切 (m )V tide 流 (m/s) 流葉流力量 () Pm = ρ AVtideCp ( β, λ ) C p( β, λ) 率數 β 度 λ 力 Cp 0.5-0. 流 Cp 0.5~0.5 流率流.0pu 率流.5 m/sec Grid Z th Network (a)hvac (b)hvdc (c) 流輪 (c) D. 流輪輪精 ( 六量 ) 流狀 d θ [0] [ I] θ [0] dt ω = + [ H] [ C] [ H] [ D] ω [ H ] () 0 I 零 θ ω 量度度狀數葉 (B,B,B) 葉 (Hub) 輪 (Gearbox, )(GEN) [ B, B, B, H,, G] [,,,,, ] θ = θ θ θ θ θ θ B B B H G ω = ω ω ω ω ω ω 狀數流流力 MC e [,,,0,0, ] MC MC MC e = 量 (Inertia) H 度 (Stiffness) C (Damping) D (mutual damping)(self damping) 參數 H = diag H, H, H, H, H,H (4) [ ] [ ] B B B H G 45

[ C] [ D] CHB 0 0 CHB 0 0 0 CHB 0 C 0 0 HB 0 0 CHB CHB 0 0 = CHB CHB CHB CH + CHB CH 0 0 0 0 CH CH + CG C G 0 0 0 0 CG CG (5) DB + d 0 0 d HB HB 0 0 0 DB + dhb 0 dhb 0 0 0 0 HB HB = dhb dhb dhb CH + dh + dhb dhbg 0 0 0 DB + d d 0 0 0 d + + H D dh dg dg 0 0 0 0 dg DG + dg (6) 力 00 年 -4 流輪率 Hz Mode (Hz).84.9 65.46 流 frequency, Hz 4 葉率 W B B W B B H H C H C G H H G d H d G D D G G G GEN IV. HVACHVDC 流力令 0. 流 ( E/M ) ( -GEN )( Hub- ) 葉 ( Blade ) D H W B B 流輪 III. 利類類量 -- (mass-damping-spring model) 類 - - 路利量率 Frequency Scanning 輪率 E/M 率 0.0 Hz 0 Hz 0.0 Hz 葉率輪列 4 (Hub-)(-GEN) 葉 (MC Blade) 率路率 (60Hz) 流 (0Hz) 率 (Unidirectional)( 流 ) mode (.84Hz) 流率流 A. HVAC: 50.0.7 路復葉率 0..0 p.u. 流流率 (-GEN).9Hz 率 ( 流 ).84Hz 力勞率復率量不 5 B. HVAC 復 (peak-to-peak) 0. 7 復路不復 46

不流量 ~ 復不復 ( 路 ) 8 靈度論 C. HVDC 流路 : 6 流流 (DC pole voltage)(voltage collapses) 流流流流 α90 度利 valve0.65α65 度流降流流流 (valve) 流流降零流流路流零 0.7 流復 6 6 流流流 :HVDC 率 HVAC ( 路路 ) 不若 HVAC 烈 ( )56 流流不 D. HVDC 復 (re-energization) 9 復 HVDC 不復 - (de-energization)- 復率.84Hz 率復 HVDC 復 HVAC 復 HVAC E. 路路 HVAC 路 HVDC mono pole 0 HVAC HVDC 0 路聯 0.7 復 Mal-synchronization() 不率理路離路流輪 F. 復路數 HVAC 若復路 HVAC 勞 HVDC 路令不復不復流力 00 年 -4 量 HVDCHVAC V. 論流力力數論 :. 流流率率 HVAC 路不力. 路復率路度度離流路. HVAC HVDC HVDC 路力 HVAC 4. 復 HVAC HVDC HVDC 復復復 VI. (98--E-44-07) VII. 參. 來, 008. http://www.greentechmedia.com/greentechmedia/re port/forecastingthefutureofoceanpower.html. L. Myers and A. S. Bahaj, Simulated electrical power potential harnessed by marine current turbine arrays in the Alderney Race, Renewable Energy, vol. 0, no., pp. 7-7, September 005.. IEC 6 400-, Wind urbine Generator Systems Part : Safety Requirements,.0 ed., 999. 4. 008 年. 5. S. E. B. Elghali, R. Balme, K. L. Saux, M. E. H. Benbouzid, J. F. Charpentier, and F. Hauville, A simulation model for the evaluation of the electrical power potential harnessed by a marine current turbine, IEEE ransactions on Oceanic Engineering, vol., no. 4, pp. 786-797, October 007. 6. W. M. J. Batten, A. S. Bahaj, A. F. Molland, and J. R. Chaplin, he prediction of the hydrodynamic performance of marine current turbines, Renewable Energy, vol., no. 5, pp. 085-096, May 008. 7. 李盧 " 流不度," 力 pp. E0.4-~5, 007 8. 醴劉龍流力 pp. 65-6, 008. 47 4

力 00 年 -4 5 路 HVAC 5 6 HVDC 流 4 (Hub- Shaft) (-GEN Shaft) (Blade) (E/M torque) 0 0.5 0.6 0.7 0.8 0.9 reclosing 7 HVAC 復 8 HVAC 9 HVDC 復 0 HVAC 路復 HVDC 復 48 5