Wind power control technology is an important part of intelligent control in wind farms. By the automatic calculation and implementation of control strategy, problems such as imprecise of manual control scheduling, sl...Wind power control technology is an important part of intelligent control in wind farms. By the automatic calculation and implementation of control strategy, problems such as imprecise of manual control scheduling, slow adjust rate, heavy workload, etc. have been solved. It can improve the capacity of wind power grid, and it also has the important meaning to the safe and stable operation of power grid. This paper introduces wind power control system from certain aspects such as control mode, control principle, and so on.展开更多
文摘Wind power control technology is an important part of intelligent control in wind farms. By the automatic calculation and implementation of control strategy, problems such as imprecise of manual control scheduling, slow adjust rate, heavy workload, etc. have been solved. It can improve the capacity of wind power grid, and it also has the important meaning to the safe and stable operation of power grid. This paper introduces wind power control system from certain aspects such as control mode, control principle, and so on.
文摘储能系统(energy storage system,ESS)仅参与平抑风电功率波动为单一场景的控制策略,存在ESS频繁充放电以及不能有效解决负荷低谷时段风电消纳等问题。为此,提出了一种计及谷时段风电消纳的ESS平抑风电功率波动控制策略。首先,根据风电特性与负荷需求的时序关系,确定ESS在一个周期内的充电和放电区间段。其次,提出了分区间控制的ESS控制策略,在充电区间段以平抑风电功率向上波动为目标存储电量;在放电区间段以平抑风电功率向下波动为目标释放电量。最后,考虑ESS的实时荷电状态(state of charge,SOC)和风电消纳,提出了基于模糊控制的ESS充放电功率修正方法。以某风电场实际数据为例,在风储联合发电系统仿真平台上进行了测试,验证了所提运行策略的可行性和优越性。
文摘【目的】在“双碳”目标背景下,解决高风电渗透率系统建设带来的调峰安全性和经济性问题。【方法】采用电池储能系统削峰填谷的解决方案,提出了一种兼顾技术及经济性的锌溴液流电池(zinc-bromine flow battery,ZBB)储能的调峰优化控制方法。根据实际电池装置,对ZBB储能进行结构解析及数学模型构建。考虑调峰技术性效果,以调峰后的负荷曲线标准差最小为目标函数,提出一种考虑调峰效果的储能双向寻优控制策略。在此基础上,依据电网分时(time of use,TOU)电价政策,以技术性及经济性最优为目标函数,提出一种基于TOU电价机制的储能调峰经济模型,得出储能优化功率时序结果。最后,以东北某地区负荷及风电数据为例,对比验证所提策略的有效性。【结果】所提策略相较于原负荷,在日均负荷峰谷差、峰谷差率指标上分别降低了35.973%和34.205%,在调峰经济性优化方面提高了5.582%,且合并缓解了电网弃风消纳问题。【结论】所提策略在达到一定调峰效果的同时,在其全寿命周期内仍保持较好的调峰经济性。
文摘风电场配置储能系统(energy storage system,ESS)是当前提高风电场响应调度计划能力的有效手段。为提高风电场可调度性和风电消纳量的同时,延长ESS的使用寿命,提出一种计及谷时段风电消纳的风储联合发电系统跟踪风电计划出力控制策略。首先,基于风电特性与负荷需求的时序关系,确定ESS在1天内的充电和放电区间。其次,根据充放电区间段的划分,提出了分区间控制的ESS控制策略,在充电区间以修正实际风电功率与计划出力上限值之间的向上偏差为目标存储电量,在放电区间以修正实际风电功率与计划出力下限值之间的向下偏差为目标释放电量。最后,结合储能系统当前荷电状态(state of charge,SOC)和峰谷分时电价,提出了采用模糊控制器修正ESS出力的控制方法。仿真结果表明,所提控制策略在提高跟踪调度计划能力和风电消纳的同时,延长了ESS使用寿命,并且具有良好的“峰谷套利”收益。