分布式调相机在新能源场站端的应用

Application of Distributed Condenser in New Energy Field Station

为实现“双碳”目标,推动电力系统绿色低碳转型,未来电力系统会出现高比例可再生能源和高比例电力电子设备的“双高”特性。传统能源发电优势在于可依赖发电机组的短路容量,电网电压稳定;可依赖发电机组的旋转惯性,电网频率稳定。新能源(风电、光伏)发电的特点则是基本无短路容量、无功支撑弱、旋转惯性无法利用、负荷不可控。根据调相机的特性,在新能源场站装设分布式调相机可以大幅增加短路容量、提升短路比,对电网稳定运行起到无法替代的支撑作用。重点介绍在电网末端新能源场站集中区域,在风电场站或光伏电站装设分布式调相机的各种设计方案。

In order to achieve the goal of"carbon peak and carbon neutrality"and promote the green and low-carbon transformation of the power system,the"double high"characteristics of high proportion renewable energy and high proportion of power electronic equipment will appear in the power system in the future.The advantages of traditional energy power generation are that it can rely on the short-circuit capacity of the generator set and the grid voltage is stable;It can rely on the rotational inertia of the generator set and the grid frequency is stable.The characteristics of new energy(wind power,photovoltaic)power generation are basically no short-circuit capacity,weak reactive power support,unusable rotational inertia,and uncontrollable load.According to the characteristics of condensers,the installation of distributed condensers in new energy stations can greatly increase the short-circuit capacity、improve the short-circuit ratio,and play an irreplaceable supporting role in the stable operation of the power grid.This paper focuses on various design schemes for installing distributed condensers in wind farm stations or photovoltaic power plants in the concentration area of new energy stations at the end of the power grid.