河南大学学报(自然科学版)
河南大學學報(自然科學版)
하남대학학보(자연과학판)
JOURNAL OF HENAN UNIVERSITY(NATURAL SCIENCE)
2010年
2期
189-196
,共8页
闫旺%李郁侠%师彪%孟欣
閆旺%李鬱俠%師彪%孟訢
염왕%리욱협%사표%맹흔
水力发电系统%有源逆变%电感设计%电容设计%变流调速系统
水力髮電繫統%有源逆變%電感設計%電容設計%變流調速繫統
수력발전계통%유원역변%전감설계%전용설계%변류조속계통
water generation system%active inverter%design inductance%design capacitance%variable flow speed regulation system
直驱型水力发电系统使水轮机与发电机之间直接相连,为提高系统效率和可靠性,减少系统在进行有源逆变时,交流侧电感的大小影响系统静、动态性能,从稳态和瞬态电流跟踪出发,提出了满足水力发电系统要求的交流侧电感设计的新方法.针对传统的直流侧电容的参数设计方法的不足,即没有考虑PWM开关周期的延时而导致的整流器和逆变器同时向直流母线馈电的问题,提出了直流侧电容容量最小化的设计方法,对所设计的变流调速系统的特性进行了仿真和实验验证.结果表明,设计的变流调速系统不仅具有能量双向流动的特性,而且具有网侧功率因数可控,电流谐波含量低,直流母线电压泵升高快且可控的优点.
直驅型水力髮電繫統使水輪機與髮電機之間直接相連,為提高繫統效率和可靠性,減少繫統在進行有源逆變時,交流側電感的大小影響繫統靜、動態性能,從穩態和瞬態電流跟蹤齣髮,提齣瞭滿足水力髮電繫統要求的交流側電感設計的新方法.針對傳統的直流側電容的參數設計方法的不足,即沒有攷慮PWM開關週期的延時而導緻的整流器和逆變器同時嚮直流母線饋電的問題,提齣瞭直流側電容容量最小化的設計方法,對所設計的變流調速繫統的特性進行瞭倣真和實驗驗證.結果錶明,設計的變流調速繫統不僅具有能量雙嚮流動的特性,而且具有網側功率因數可控,電流諧波含量低,直流母線電壓泵升高快且可控的優點.
직구형수력발전계통사수륜궤여발전궤지간직접상련,위제고계통효솔화가고성,감소계통재진행유원역변시,교류측전감적대소영향계통정、동태성능,종은태화순태전류근종출발,제출료만족수력발전계통요구적교류측전감설계적신방법.침대전통적직류측전용적삼수설계방법적불족,즉몰유고필PWM개관주기적연시이도치적정류기화역변기동시향직류모선궤전적문제,제출료직류측전용용량최소화적설계방법,대소설계적변류조속계통적특성진행료방진화실험험증.결과표명,설계적변류조속계통불부구유능량쌍향류동적특성,이차구유망측공솔인수가공,전류해파함량저,직류모선전압빙승고쾌차가공적우점.
Direct-drive water generation system is connected directly to the water turbine and generator. In order to improve the efficiency and reliability of system, to reduce the inductance of AC side affects the static and dynamic performance of the whole system when the direct-drive water generation system is actively inverting. The paper presents a new design method of the inductance of AC side based on steady-state and transient current tracking, which can meet demands of the direct-drive water generation system, and verifies its feasibility by simulation. At the same time, the parameters designs method of the traditional DC capacitance have some limitations, which does not account for any problems, such as PWM switching cycle of delay caused by the rectifier and inverter DC bus synchronously to feed the problem. In order to resolve such questions, the new design method of the smallest DC capacitor capacity is proposed, and the characteristics of variable flow speed control system was emulated and experimented, the simulation and experimental verification is correct. The results showed that the hydroelectric power converter speed control system not only has the characteristics of two-way flow of energy, but also has power factor controllable network side, the current low harmonic content, the DC bus voltage pump up fast and controllable.