高载能负荷参与可再生能源消纳的无功控制策略
发布时间：2018-11-09 17:04
【摘要】：风力发电、光伏发电发展迅速,但由于风能、太阳能等可再生能源本身具有间歇性和波动性的特征,再加之大规模集中接入电网的风/光电基地一般远离电力负荷中心,且电源结构常常受到“缺煤、少水”的制约,调节性电源和需求侧响应资源缺乏,加大了电网调度的难度。高载能负荷具有可调容量大、响应速度快经济效益显著的优点,利用高载能负荷参与电网调度,不仅能够减轻外送通道压力而且能够增加可再生能源的消纳。本文首先通过理论分析高载能负荷参与可再生能源消纳对电网电压的影响,论证了对高载能负荷参与可再生能源消纳进行无功控制研究具有重要的现实意义。接着总结了现有动态无功补偿装置和静态无功补偿装置的动作特性、优缺点为无功补偿装置类型的选择提供理论依据。建立了考虑电压质量以及无功补偿配置投资运维成本的无功优化数学模型,并通过改进遗传算法对模型进行求解。最后针对高载能负荷参与调压提出了一种三级电压控制策略,该策略利用无功/电压灵敏度信息对地区电网进行三级电压控制,在无功补偿装置尽可能少动作的基础上使得电网的电压处于合理水平,从而最大化的增加可再生能源的消纳。最后将本文所提出的控制策略应用到甘肃省河西电网,验证了所提出的无功控制策略的可行性与有效性。
[Abstract]:Wind power generation and photovoltaic power generation are developing rapidly, but renewable energy sources such as wind energy, solar energy and other renewable energy sources have the characteristics of intermittence and volatility, and wind / photovoltaic bases with large-scale centralized access to power grids are generally far away from power load centers. The power supply structure is often restricted by "lack of coal and water", and the lack of regulating power supply and demand-side response resources increases the difficulty of power grid dispatching. High load has the advantages of large adjustable capacity, fast response speed and remarkable economic benefit. The use of high load to participate in power grid dispatching can not only reduce the pressure of the outgoing channel but also increase the absorption of renewable energy. In this paper, the influence of high load on the grid voltage is analyzed theoretically, and it is proved that it is of great practical significance to study the reactive power control of high load involved in renewable energy consumption. Then it summarizes the action characteristics of the existing dynamic reactive power compensator and static reactive power compensator. The advantages and disadvantages provide the theoretical basis for the choice of reactive power compensator type. The mathematical model of reactive power optimization considering voltage quality and reactive power compensation configuration investment operation cost is established, and the model is solved by improved genetic algorithm. Finally, a three-stage voltage control strategy is proposed for high-load to participate in voltage regulation. The strategy uses reactive power / voltage sensitivity information to control the three-stage voltage of local power network. On the basis of the minimum operation of the reactive power compensator, the voltage of the power grid is at a reasonable level, thus maximizing the absorption of renewable energy. Finally, the proposed control strategy is applied to the Hexi power grid in Gansu Province, which verifies the feasibility and effectiveness of the proposed reactive power control strategy.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM73
[Abstract]:Wind power generation and photovoltaic power generation are developing rapidly, but renewable energy sources such as wind energy, solar energy and other renewable energy sources have the characteristics of intermittence and volatility, and wind / photovoltaic bases with large-scale centralized access to power grids are generally far away from power load centers. The power supply structure is often restricted by "lack of coal and water", and the lack of regulating power supply and demand-side response resources increases the difficulty of power grid dispatching. High load has the advantages of large adjustable capacity, fast response speed and remarkable economic benefit. The use of high load to participate in power grid dispatching can not only reduce the pressure of the outgoing channel but also increase the absorption of renewable energy. In this paper, the influence of high load on the grid voltage is analyzed theoretically, and it is proved that it is of great practical significance to study the reactive power control of high load involved in renewable energy consumption. Then it summarizes the action characteristics of the existing dynamic reactive power compensator and static reactive power compensator. The advantages and disadvantages provide the theoretical basis for the choice of reactive power compensator type. The mathematical model of reactive power optimization considering voltage quality and reactive power compensation configuration investment operation cost is established, and the model is solved by improved genetic algorithm. Finally, a three-stage voltage control strategy is proposed for high-load to participate in voltage regulation. The strategy uses reactive power / voltage sensitivity information to control the three-stage voltage of local power network. On the basis of the minimum operation of the reactive power compensator, the voltage of the power grid is at a reasonable level, thus maximizing the absorption of renewable energy. Finally, the proposed control strategy is applied to the Hexi power grid in Gansu Province, which verifies the feasibility and effectiveness of the proposed reactive power control strategy.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM73
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