雙饋式感應發電機轉子側電力轉換器控制技術開發與實現

Implementations and Developments of Control Techniques of Rotor Side Converters for Doubly-Fed Induction Generators

洪嘉駿(Chia-Chun Hung)

指導教授 ： 朱家齊 ； 潘晴財

國立清華大學/電機資訊學院/電機工程學系/碩士(2008年)

https://doi.org/10.6843/NTHU.2008.00719

摘要

隨著自然資源的日益枯竭，再生能源有著非常廣闊的前景，雙饋式感應發電機具有優越的穩態和暫態操作性能，且降低所需電力轉換器之額定功率，特別適用於風力發電及抽蓄水力發電等再生能源發電系統。藉由控制轉子電壓的幅值、相位和頻率，可實現雙饋式感應發電機在次同步速度、同步速度及超同步速度下的正常發電運轉，並可藉此控制發電機輸出實功功率及虛功功率，因此採用合適的激磁控制策略是雙饋式感應發電機能夠發揮其良好的調節性能、操作的靈活性及可靠性的關鍵。
本論文主要針對雙饋式感應發電機之轉子側電力轉換器，其應用的向量控制策略進行深入地研究。然而，由於其複雜的動態數學模式，使得一些基本場導向控制特性並未為吾人所充分瞭解，因此本論文首先推導出雙饋式感應發電機之廣義磁場導向控制之動態模型與所需滿足的限制條件，方便統合各種磁場導向控制策略，可看出傳統的轉子磁場導向控制、定子磁場導向控制及氣隙磁場導向控制均為廣義磁場導向控制法之特例，因此有利於開發新型導向控制策略；其次，深入分析向量控制策略應用於雙饋式感應發電機之實現方法，達到實功功率與虛功功率的解耦合控制，再以MATLAB/Simulink模擬驗證其可行性；最後，以數位訊號處理器TMS320F2812為核心，製作一套2.2kW的雙饋式感應發電機雛型系統，以驗證控制技術之正確性。

關鍵字

雙饋式感應發電機 ； 轉子側電力轉換器 ； 廣義磁場導向控制 ； 定子電壓導向控制 ； 實虛功控制 ； 數位訊號處理器

並列摘要

Due to superior static and dynamic performances and low power ratings of associated power converters, doubly-fed induction generators (DFIG) become a new trend for renewable energy technology, especially for wind and hydro pump-storage power generations. By appropriately controlling the magnitude, phase, and frequency of the rotor voltage phasor, the DFIG can be operated in various operating modes, including sub-synchronous modes, synchronous modes, and super-synchronous modes.

In this thesis, we will focus on the rotor side control of DFIGs. In order to achieve active power and reactive power decoupled control, a generalized flux oriented control will be investigated in details. It can be shown that the conventional stator flux oriented control, rotor flux oriented control, and air-gap flux oriented control are all special cases of the proposed control algorithm. The MATLAB/Simulink simulation platform has been studied for verifying the feasibility and the correctness of the proposed control algorithms. We also developed a 2.2 kW hardware prototype for the DFIG. The TMS320F2812 digital signal processor is utilized for real-time controller implementations. In order to verify the proposed generalized flux oriented algorithms, the hardware DFIG platform test has been conducted under different operating conditions. Measured waveforms demonstrate excellent performances of the proposed control algorithms.

並列關鍵字

Doubly-Fed Induction Generators ； Rotor-side Converter ； Generalize Flux Oriented Control ； Stator Voltage Oriented Control ； Active Power and Reactive Power Control ； Digital Signal Processor

參考文獻

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