计及风电场的初期黑启动方案技术校验

发布时间：2018-05-24 18:27

本文选题：电力系统 + 初期黑启动　；参考：《华北电力大学》2017年硕士论文

【摘要】：近些年来发生的多次大停电事故警示我们,电网的大规模互联虽然能平息电力系统日常的“小风小浪”,但电力系统偶遇的“大风大浪”很可能引起连锁故障,进而引发大停电,带来巨大的经济损失和社会危害。因此,有必要提前制定黑启动(Black Start,BS)方案,以便大停电发生时能有条不紊地尽快恢复系统。电力系统中风电渗透率的不断增大,使风电参与黑启动成为必要;而风电控制技术和储能技术的不断提高,使风电参与黑启动成为可能。本文的主要工作是为了让风电参与初期黑启动,给风电场配置了发挥平抑风电出力作用的储能电站,为了使风电满足初期黑启动的要求,提出了新的储能配置策略,此后对水火风储所形成的孤岛系统进行后续黑启动校验。首先,研究了双馈风电机组和储能电站的数学模型,并在PSCAD/EMTDC软件上搭建了风电场等值模型和可以发挥平抑作用的储能电站模型,并通过仿真验证了搭建风电场模型的正确性以及储能电站的合理性。然后提出了新的储能配置策略。首先求取了初期恢复系统所需平抑的最大功率波动,将此作为风电输出功率的限幅目标;然后将限幅目标作为确定储能电站功率的主要依据,将限幅目标和典型火电机组辅机的启动时间作为确定储能电站容量的主要依据,从而确保在储能电站发挥平抑作用的时间长度内,风电场的输出功率波动值限定在限幅目标内;通过仿真验证了配置的储能电站能够使风电场安全平稳地参与初期黑启动。最后,对水火风储系统进行了后续恢复过程的技术校验,主要对线路过电压、厂用负荷启动时的系统电压、频率问题和低频振荡问题进行校验,证实了此系统可以承受风储联合系统的波动性问题,此后的恢复过程可以顺利进行。
[Abstract]:The numerous power outages that have occurred in recent years have warned us that although large-scale interconnection of power grids can quell the daily "small wind and small waves" of the power system, the occasional "big waves" in the power system are likely to cause cascading failures. In turn, caused by power outages, bring huge economic losses and social harm. Therefore, it is necessary to develop the Black start BSs in advance so that the system can be restored as soon as possible in the event of blackout. With the increasing permeability of wind power in power system, it is necessary for wind power to participate in black start, and the continuous improvement of wind power control technology and energy storage technology makes it possible for wind power to participate in black start. The main work of this paper is to allow wind power to take part in the initial black start, and to configure the wind farm with a storage power station that exerts the function of levelling the wind power. In order to make the wind power meet the requirements of the initial black start, a new strategy of energy storage configuration is put forward. After that, the isolated island system formed by the water and fire wind storage is verified by subsequent black start check. Firstly, the mathematical models of doubly-fed wind turbine and energy storage power station are studied, and the equivalent model of wind farm and the model of energy storage power station which can play a stabilizing role are built on the PSCAD/EMTDC software. The correctness of wind farm model and the rationality of energy storage power station are verified by simulation. Then a new strategy of energy storage configuration is proposed. First, the maximum power fluctuation needed for the initial recovery system is obtained, which is regarded as the limiting target of wind power output, and then the limiting target is taken as the main basis for determining the power of the storage power plant. The limiting target and the start-up time of the auxiliary unit of typical thermal power unit are taken as the main basis for determining the capacity of the storage power station, so as to ensure that the fluctuation value of the output power of the wind farm is limited to the limiting target in the time period of the energy storage power station playing a stabilizing role. The simulation results show that the configured energy storage power station can make wind farm participate in the initial black start safely and smoothly. Finally, the technical verification of the subsequent recovery process of the water and fire air storage system is carried out, mainly for the line overvoltage, the system voltage, frequency problem and the low frequency oscillation problem during the start-up of the plant load. It is proved that the system can withstand the volatility of the combined wind and storage system, and the recovery process can be carried out smoothly.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM614

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