CAJ | 학술논문

随着光伏并网电站的数量增多、容量增大，其对电网的保护与控制的影响不可忽略。建立光伏发电站的电磁暂态仿真和等值计算模型是研究其并网特性及对继电保护影响的基础。介绍了光伏电站接入电网的常见形式，建立了一种通过单级式逆变器并网的光伏发电单元模型，并利用在PSCAD/EMTDC上搭建的光伏发电系统电磁暂态仿真模型验证了其在稳态和暂态条件下的有效性。在此基础上，给出了一种由光伏发电单元组成的光伏电站的等值计算模型，并仿真验证了其有效性。
수착광복병망전참적수량증다、용량증대，기대전망적보호여공제적영향불가홀략。건립광복발전참적전자잠태방진화등치계산모형시연구기병망특성급대계전보호영향적기출。개소료광복전참접입전망적상견형식，건립료일충통과단급식역변기병망적광복발전단원모형，병이용재PSCAD/EMTDC상탑건적광복발전계통전자잠태방진모형험증료기재은태화잠태조건하적유효성。재차기출상，급출료일충유광복발전단원조성적광복전참적등치계산모형，병방진험증료기유효성。
With the increasing of number and capacity of photovoltaic power stations connected to grid, its impact on the relay protection and control of the power grid can’t be ignored. Building the photovoltaic power stations’ electromagnetic transient simulation and equivalent calculation model is the basis of the grid-connected characteristics and the influence on relay protection. This paper introduces the common form of photovoltaic power station connected to grid, establishes a photovoltaic power generation unit model based on single-stage inverters, then builds a photovoltaic power generation system electromagnetic transient simulation model on PSCAD / EMTDC to verify its validity in steady and transient conditions. On this basis, the equivalent calculation model of the photovoltaic power plant consisting of photovoltaic power generation unit is given, and its validity is verified by the simulation.