| Distr ib uted generat ion(DG) developed rapid ly in the world because of its low invest ment, low consumpt ion, cleanliness and syste m high re liability, and it has become the strong comple me nt to the trad it iona l lar ge- scale centra lized power generat ion model. The w ind power, a kind of c lean and renewable e nergy, is one o f the most mat ure new energy techno logy which has the most lar ge- scale deve lopme nt cond it ions and commerc ializat ion prospects. Distr ibuted wind far ms are typica lly dispersed in 110 k V and below connected to the gr id, mak ing t he trend of gr id flow and the characterist ic of the regiona l load changes, thus ine vitably affect the equiva lent features of t he compos ite load. From t he perspective of load modeling research, it is necessary to study the characterist ics of the compos ite load and the equiva lent model consider ing the w ind power connected to the gr id.Amo ng the many types of w ind turbines, the doubly- fed induct io n generators(Doubly-Fed Induct ion Generator, DFIG) due to its sma ll vo lume, low cost, got the favor of many global wind power equip ment manufacturers and operators and has become the main cho ice of the current w ind power. Based on the stud y of DFIG system struct ure, power characterist ics and control theory, the paper constructed a DFIG electromechanica l trans ie nt equiva le nt descriptio n model w hich s imp lified the electric relat ions hip on both sides of the bid irectio na l con verter. Under the condit io n of different vo ltage dist urbance simulat ions, it shows that the para meters are simp le, practica l and the model has a very good descript ion abilit y and genera lizat ion abilit y.The above model is equipped wit h an synthes is load mo del(Synt hes is Load Model, SLM) to build a generalized synt hesis load model(DFIG- Generalized Synt hesis Load Model, D- GSLM), which can be used to describe the generalized comprehe ns ive d istr ibut ion network load conta ining double- fed wind power generat ion syste m. Us ing the measured data samp le collected under vario us cond it ions of w ind power capacit y as a model ident ificat ion data needed and compared the description of the two models under various DG's penetration levels fro m three aspects: fitt ing renderings, comprehe ns ive resid uals and model accuracy.Comb ined t he above work w ith several typ ical inte grated load model, designed and imp le mented a load modeling p lat form cons ider ing distr ib uted power, achiev ing the integrat ion of load modeling and model evaluat ion. The syste m is based on C# and C, whic h is easy to operate, interact ive, with good scalab ilit y and provides a comp lete experimenta l plat for m for the study of the impact that distr ibuted power carry out on the gr id synt hes is load model. |
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