Điều khiển bám lưới hệ thống phát điện sức gió sử dụng máy phát không đồng bộ nguồn kép bằng phương pháp tựa theo thụ động

Ddng Danh Hodng Tap chi KHOA HQC & CONG NGHE 128(14): 155-160 GRID RETAINING CONTROL OF WIND POWER PLANTS SYSTEM USING DOUBLY-FED INDUCTION GENERATORS BY PASSIVITY -BASED METHOD Dang Danh Hoang College ofTechnology - TNU SUMMARY The surveying and evaluation of the quality of control method for wind power systems using Doubly-Fed Induction Generators (DFIG) is a highly important signification, A new designing methodology for the passivity-based nonlinear controller is applied to gain some results which are described in this paper as can be seen, to control the Doubly-Fed Induction Generators, to maintain grid retaining of system in syschronical fault case which lead to drop a part of grid voltage Key word; Passivity- based control, wind power, gridfault Notation Notation R(x) J(x) Unit G(x) Lr T„Ts rad/s ^t,^ ^>sd, H s '^sq Ad, ll'tq Wb Wb O ^m H Meaning Attenuation mauix MaUix links blocks in system structure Matrix represents input, output relation Rotor's induction Timing constant of rotor and stator Rotor's radian frequency, mechanical angular speed of rotor Components d and q of magnetic flux stator Components d and q of magnetic flux rotor Summing dissipated coefficient Mutual inductance between stator and rotor Abbreviation DFIG Doubly-Fed Inducdon Generators PDSG Wind;power generators EL Euler •• Lagrange Passive based control PBC NL Energy PREFACE Recently, in our country as well as in over the world, controlling Doubly-Fed Induction Generators in Wind power generators system (PDSG) is a considerative problem Now, there are some researchers who using a few control methods, such as: accurate Tel: 0912 847588 linearazalion[9], backslepping[l] and had gotten positive results We ourselves also published searching projects in this field [2, 3] This article introduces achievement of passivity-based control method lo control Doubly-Fed Induction Generators in the case of grid failure In details: Control to ensure wind power generators using Double-Fed Three-phrases Induction Generators in grid tracking when symmetrica! grid failure happened leading lo drop apart of grid voltage avoiding grid clumble if the generators cut out of grid simultaneously There will be established systems containing many wind power generators, therefore when the errors happen, generators all cut out of grid easily occurs grid clumble Thus, controling grid tracking is very important when the errors occur This study itself focused on dealing the problem mentioned above, PASSIVITY-BASED CONTROL METHOD Fundamental theory Passivity Based Control - PBC is controlling algorithm which its principle based on passitive characteristic of objects (open-system) target to change closed-system being passive with expective energy storage function Consider a system Z which has summing function of energy storage //(x,x) (positive difining), input turning vector u, output y and ignore disturbance So that, delivery speed of 155 Ddng Danh Hodng energy for system will be y^u That could be passivity if: jy^udl 128(14): 155-160 Tap chi KHOA HOC & CONG NGHf H(T)-HiO) (energy function He, NL) and mechanical dynamics (energy function Hm) - Hdnh (0 enerj^y inpuT where x = (xi,X2, x„)^ and i is state vector and state derivative vector of system Means that S: « -> y defining a passive relation using summing energy storage function H(x,x) If u = then H,.ird* and Mr./,^* as well as compensating others parameters such as: grid voltage, stator fiux, rotor speed and involve integral composition lo reduce static errors From (6), (7) and figure 4, we determine by using general control structure in generator side as figure showed Design controller in grid side Due to grid side requirement is stable control the voltage uDC providing for middle DC circuit Therefore, this journal also gives a simple design method called normally linear Dead- Beat method [1, 3, 4] Diagram and illustrative result using Matlab - SimuTtnk - Plecs Illustrate the generator having parameter below: P j „ - 1,1 KW U j „ = 345 V R, = 3.7 n Ua.„ -220/380(aA-) ni„ =950 V/ph L „ = 0.013H ; t ;|—7" ; f I- f \ i ::::!:::::::!;;;::::: PV-i \ Figure Moment when grid drops out 10% Sf L „ = 0.0089H f -50Hz Rs =4.2 Q 2p-3 J - 0.064Kgm2 Cos(j)j„ -0.657 L„ - 0,34H lj„ = 3,5A Figure Grid voltage when drop out 10% Identification: VM Vietnam Figure Cosq) when grid drops out !0% Dang Danh Hoang Tap chi KHOA HQC & CONG NGHE \f -^^"^ ^ -v — i f : 128(14): 5 - 160 tE Idv- Vi i rt i ^ Figure 10 Rotor current when grid drops 10% In case, voltage droping (symmetries) decreasing % , n = Udm = r p m ; Applying control step m o m e n t from m=-5Nm to ONm and coscp step down coscp = 0.7 to 0.436 (sincp = 0,9) for grid tracking: Figure 11 Grid voltage when drop out 50% : I^Z f I •• I i I Vl ; : ; : ; i ' Figure 12 Moment when grid drops out 50% 1—-"-'^'^'•g''''l="=',.''°^ r 1" \tf _^ I ^q;:::::t:;;;:: » Figure 13 Cos^ when grid drops out 50% Figure 14 Rotor current when grid drops 50% CONCLUSION - T h e paper has given a new control algorithm adding to [3] - Illustrative result showed that rotor current controller had controlled sections: ird, irq follow up set points ird , irq when grid droped out (symmetries) leading lo voltage drop out from 10% to % of grid voltage and rotor angle fi-equency when curent controller PBC is fiuctuative then working stability When the failure finished, system return to stable ( f i g u r e , 8, 9, 11, 12, 13, 14) The illustrative showed the stability of PBC controller when error occurs Addition, it identicates the guaranteed control quality of system, REFERENCES Cao Xuan Tuyen: "Tong hgp cdc thudt todn phi luyen tren ca sd phuang phdp backsleppmg de diiu khien mdy dien di bg ngudn kep he thong may phdt dien sue gid", Luan an tien sT ky thuat, Dai hpc Bach khoa Ha ngi, 2008, Dang Danh Hoang: "Hod dong bo mdy phdt dien Ien lual bdng phuang phdp dieu khien passivity-based" Tap chi KHCN dai hoc Thai nguyen, 2010 Dang Danh Hoang, Nguyln Phiing Quang, "Thiet ke bg dieu khiin dua tren thu dong "Passivity - based" di dieu khien mdy phdt diin khong dong bg nguon kep" Tap chi KHCN cac truong dai hoc ky thuat, so 76, nSm 2010 Ng.Ph.Quang, A DitUich (2008) Vector Control of Three - Phase AC Machines - System Development In the Practice Springer Heidelberg Berlin, NgPh.Quang: "'Matlab & Simulink danh cho ky su dieu khien tu dpng " Nxb Khoa hoc va Ky thuat Ha npi, 2004 159 Dang Danh Hoang 128(14): 5 - Tap chi KHOA HQC & C N G NGHE 6, Ng.Ph.Quang: "Dieu khien tu ddng truyen dgng di?n xoay chiiu ba pha" Nxb GD, Hanoi, 1996 N,D,Phui^c, P.X.Minh, H,T,Trung: Ly thuySt diiu khien phi tuyen Nxb Khoa hoc v^ Ky thuat Ha npi, 2003 8, Amau D'oria-Cerezo, "Modeling, simulation and control of a doubly-fed induction machine controlled by -J back-to-back converter" PhD Thesis, 2006 Lan, Ph.Ng: "Linear and nonlinear conUol approach of doubly - fed induction generator in wind power generation", P.h.D thesis, TUDresden, 2006 10 Levent U.gedere, Marwan A Simaan, Charles W, Brice: "Passivity - Based Control of Saturated Induction Motors", 1997, IEEE 11 R.Ortega, A.Loria, P.J.Nicklasson, H.SiraRamirez: "Passivity-based Control of Euler Lagrange Systems Mechanical, Electrical and Electromechanical Applications" SpringerVerlay, London-Berlin-Heidelberg, 1998, TOM TAT DIEU KHIEN BAM LlfCfl HE T H N G PHAT DIEN SlTC GIO S C D U N G M A Y P H A T KHONG DONG BQ N G U N KEP BANG PHirONG PHAP TITA THEO THU DONG Trudng Dgi hpc Kp thudt C Bang Danh Hoang ? nghiep - f^H Thdi Nguyen Viec khao sat, danh gia chat lugng phuong phap dieu khien cho he thong may phat dien siic gio sir dung may di6n khong d6ng bp nguon kep co mgt y nghTa het siic quan trgng Bai bao trinh bay k4t qua nghien ciiu ap dyng phuong phap thilt k l bfl dilu khiln phi myln tua theo thu dgng (passivity - based) dt dieu khi6n may phat diSn khong d6ng bg nguon kep, dam bao bam luai xay l§i luai doi xiing xa gay sap mgt phan dien i p luoi Tir kho^: Dieu khien tua theo thu dong, sue gio, lot ludi Ngdy nhdn bdi-18/9/2014 Ngdy phdn biin:05/11/2014, Ngdy duy?t ddng: Phdn biin khoa hoc: PGS TS Lai Khde Ldi - Dgi hgc Thdi Nguyen Tei 0912 847588 160 25/11/2014 ... tua theo thu dgng (passivity - based) dt dieu khi6n may phat diSn khong d6ng bg nguon kep, dam bao bam luai xay l§i luai doi xiing xa gay sap mgt phan dien i p luoi Tir kho^: Dieu khien tua theo. .. G PHAT DIEN SlTC GIO S C D U N G M A Y P H A T KHONG DONG BQ N G U N KEP BANG PHirONG PHAP TITA THEO THU DONG Trudng Dgi hpc Kp thudt C Bang Danh Hoang ? nghiep - f^H Thdi Nguyen Viec khao sat,