储能系统黑启动功率分配控制策略

Power Distribution Control Strategy of Energy Storage System in Black Start Process

孤岛电网由于电网容量小、调节能量弱,极容易发生系统性崩网。当孤岛电网崩溃后,需要在不依赖外部公共电网的情况下,通过其内部的黑启动电源进行电网的建立。近年来,随着储能技术的快速发展,越来越多的储能系统应用于孤岛电网中,用于孤岛电网内电力负荷平衡的调节,这使得储能系统与传统的柴油发电机共同来完成电网黑启动成为可能。以实际孤网黑启动为例,介绍了孤网黑启动电源供电网络架构,同时针对储能变流器多机电压源并联运行情况,在解决多机并联系统内部环流的前提下,分析了大规模储能系统作为黑启动电源所采用的基于虚拟阻抗的统一下垂控制策略,构建了仿真模型,并进行了验证。

Due to the small capacity and weak regulation energy of island grid,it is very easy to cause system collapse.When the isolated grid collapses,it is necessary to establish the grid through its internal black start power supply without relying on the external public grid.In recent years,with the rapid development of energy storage technology,more and more energy storage systems are incorporated into the isolated grid to regulate the power load balance in the isolated grid,which makes it possible for the energy storage system and the traditional diesel generator to complete the black start of the power grid together.Take the actual isolated grid black start as an example,the power supply network architecture of isolated grid black start power supply was introduced,and the unified droop control strategy based on virtual impedance for building large-scale energy storage system black start power supply in isolated mode was analyzed under the premise of solving the internal circulation of multi machine parallel system and aiming at the parallel voltage source of energy storage converter,the simulation model was constructed and verified.