本质安全换流的高频链矩阵式逆变器关键技术研究

The study objects have been selected as high frequency link matrix inverter with single-phase and three-phase output, the fundamental purpose has been established to realize intrinsic safety of the bidirectional switch commutation, the waveform control and parallel operation of inverter have been stated as a deep-going study, and the photovoltaic micro grid inveterate interface has been choosed as the specific application. According to the special working phenomenon found in beforehand research practice, based on thorough analysis of the working mechanism of high-frequency link matrix inverter, some key issues of the high frequency inverter as system design principle, the modulation method, the circuit topology and control strategy will be systematically studied. .The main features and innovations include: (1) to put forward a new principle of the overall system design will be based on a comprehensive consideration of impact power on high-frequency link matrix type inverter compositions and operation conditions, and, (2) to find the problem from the beforehand research results, to tap root of the problem based on the physical and mathematical models, to construct new modulation schemes, to propose new ideas on resonant conversion and soft switching method, to design new parameters and circuit topologies, and to gain the intrinsically safe commutation and optimal waveform control of high-frequency link matrix type converter, and, (3) to explore new control strategies to achieve fast response and zero steady-state error of high frequency link matrix inverter, and, (4) to take the lead in the parallel operation of three-phase four leg high frequency link matrix inverter, and the parallel inverter system has such merits such as sensible sharing of load power, easy extensibility and high reliability.

以单相及三相高频链矩阵式逆变器为研究对象，以实现双向开关本质安全换流为根本宗旨，以逆变器波形控制及并联运行作为深入延展，以光伏微电网逆变接口为具体应用，结合预研实践中发现的特殊工作现象，深入分析高频链矩阵逆变器的工作机理，较成体系地研究系统设计、调制方法、电路拓扑和控制策略等关键问题。.主要特色和创新包括：.（1）综合考量高频链矩阵式逆变器的工作条件及其构成要件的运行权重，提出系统整体设计的新原则。（2）从预研结果中发现问题，依据物理及数学模型挖掘其根源，构建新型调制方案，提出谐振变换及软开关思路，设计新的参数和电路拓扑，实现高频链矩阵式变换器的本质安全换流和优化波形控制。（3）探索新型控制策略，实现高频链矩阵式逆变器快速响应和逆变器零稳态误差。（4）首次进行三相四桥臂高频链矩阵式逆变器模块化并联，系统合理分担负载功率，扩展方便，可靠性高。

针对制约高频链矩阵式变换技术的“双向开关换流难题”，以及实际负载不平衡、电网的相间不对称和波形质量差等非理想工况，项目以能够实现高频链矩阵式逆变器本质安全换流的关键技术为根本目标，以及以进一步提高电能波形质量，增强变换器对对不对称电网和不平衡负载的适应性为核心研究任务，开展了研究工作，在系统设计、电路拓扑、单机调制方案及并联并网控制策略四大方面取得了较好的新进展和成效。.依托项目支持，共发表论文45篇，其中EI检索期刊论文9篇，非EI检索中文核心期刊论文6篇，EI检索IEEE国际学术会议论文12篇，国内学术会议论文18篇。录用可EI检索期刊论文1篇。共申请中国发明专利35项，共申请实用新型专利1项，其中，已授权中国发明专利6项，已授权实用新型专利1项。授权发明专利中，已实现成果转化应用1项。.共培养硕博研究生共计32人，其中已毕业硕士研究生16人，在读硕博连读研究生1人，培养在读硕士研究生15人。.实现了既定的变换器本质安全换流的根本研究目标，实现了高频链矩阵式变换器在理想及非理想电网、平衡及不平衡负载、并网、并联及单机工况时的正常工作，取得了一定的理论及实验数据、资料、论文和专利，对推动高频链矩阵式变换器的深入研究和实用化，具有较好的学术价值和应用前景，也可较好地助力我国高频链矩阵式变换技术知识产权自主化。