新型光伏逆变器涉网运行性能工程测试系统

Engineering test system for the performance of a new type photovoltaic inverter involved in power grid

为解决光伏逆变器检测方法和测试系统难以全面评估逆变器运行性能的问题,提出了光伏逆变器涉网运行性能工程测试系统。通过增加电站及接入点选址、经济效益等指标提升了测试方案的适用性及测试方案整体性能评估能力,弥补了原有测试方案仅从功率输出特性、电能质量、安全性能、系统效率等常规测试内容方面进行性能评估的不足。在满足光伏逆变器工程应用要求和光伏电站并网标准测试内容的基础上,实现新型光伏逆变器的并网性能全面评估。通过对3种规格的碳化硅(SiC)光伏逆变器开展涉网运行性能测试,验证了新型光伏逆变器涉网运行性能工程测试系统的可行性和有效性。

Since the conventional test method and test system for photovoltaic inverters cannot comprehensively evaluate the performance of inverters,a new engineering test system for the performance of photovoltaic inverters involved in power grid is proposed.By adding indicators such as site selection of power stations and access points and economic benefits,the applicability and performance evaluation capability of the method has been improved,making up the shortcomings of the original evaluation method which only assesses conventional test indicators such as power output characteristics,power quality,safety performance and system efficiency.The method not only meets the requirements of PV inverters'engineering application and test items of grid-connected standards for photovoltaic power stations,but also provides a comprehensive evaluation for the performance of a new type photovoltaic inverter involved in power grid.The onsite engineering test results of three types of silicon carbide(SiC)based PV inverters verifies the feasibility and effectiveness of the proposed test system for the performance of the new photovoltaic inverter involved in power grid.