间歇式清洁电能灵活分散消纳的新型场-网-荷协同方法研究

The variability and uncertainty of output of wind power and photovoltaic power stations largely determine the process, clean electric energy is only highly absorbed by the utility grid with high safety and quality standards, must also be the process of high cost consumption of flexible resources. The problem of insufficient flexible controllability under the technical and economic indexes is the main cause of abandon of a large number of clean electric energy. Therefore, it is urgent to explore a more flexible operation and consumption mode. For the wind power and photovoltaic power stations with decentralized integration or those with centralized integration and being closer to flexible load, this project will study methods for improving utilization efficiency of flexible resources with two kinds of collaboration. The first kind of collaboration is between the utility power grid under the state owned economy (SG) and the power grid under the mixed ownership economy (MG), and the second kind of collaboration is among the station, the grid and the flexible load in MG. The study contents are as follows: methods of station output power characteristics decomposition and quality evaluation; analysis of directional distribution of high and low quality power components; low quality power recovery technology for economic benefit promotion; high quality power operation technology for control performance enhancement; two-level collaborative control and energy-hub technologies for comprehensive performance improvement; comprehensive benefit evaluation of collaborative control; and et al..The expected results will enrich and develop the existing absorption theory and technology for intermittent clean electric energy. It will be helpful to deeply mine and rationally use the overall flexibility of system, to heighten the absorption level of intermittent clean electric energy and to enhance the overall value of consumptive chain of it.

风光等间歇式清洁电源输出的多变性和不确定性，很大程度上决定了单纯由执行高安全质量标准的公用型网高额消纳清洁电能的过程，必然也是高成本消耗系统灵活资源的过程。技术经济指标综合制约下的灵活可控能力不足问题，是造成清洁电能大量被弃的主因，亟需探寻更为灵活的消纳方式和运营模式。项目针对分散接入的、部分距柔性负荷较近的集中接入的风光电源场站，研究如何通过公用型网和混改型网的协同、混改型网内场-网-荷（柔性）的协同，以提高灵活资源使用效能的方法。主要包括：场站输出功率特征分解与功率品质评估、高低品质成分定向配送关系分析、经济效益提升的低品质功率回收技术、调控性能提升的高品质功率运行技术、面向两网综合性能提升的两级协同及其能量路由控制技术、协同控制的综合效益评估等问题。.预期成果将丰富与发展现有消纳理论和技术，有助于通过深入挖掘和合理使用系统整体灵活调节潜能，实现消纳水平提高、消纳链整体价值提升的目的。

间歇式清洁电源场站（Intermittent clean power station，ICPS）输出功率具有多变性和高不确定性。若ICPS所发电能单纯由执行高安全质量标准的公用型主网高额度消纳，则势必引起网侧灵活调节资源边际成本的快速上升；若硬性要求ICPS配置定量新型灵活调节资源以自我消除入网功率中的超标成分，则势必引起源侧发电成本的快速上升。项目针对分散接入的、部分距柔性负荷较近的集中接入的ICPS，探寻具有技术-经济综合优势的新型场-网-荷协同消纳与运营模式，并重点研究通过公用型网和混改型网的协同、混改型网内场-网-荷（柔性）的协同以提高灵活资源综合使用效能的方法。.主要进展：1）建立了量化ICPS输出品质等级的指标体系，设计了基于品质等级与考核信息的分级定价与梯级考核机制，有助于调动ICPS通过改善并网品质赚取更高发电收益的市场积极性；2）在增强ICPS计划执行能力方面，提出了适应ICPS发电功率高低品质分解配送和输入主网发电曲线偏差考核的、顺应独立市场主体地位培育需要的新型场-网-荷协同计划模式，并设计出面向不同调度目标的计划申报策略，对降低ICPS计划外功率调节负担、营造场-网-荷三方共赢利益格局，具有重要应用价值；3）将新型场-网-荷协同消纳思想拓展应用于新型城市电网调控，通过负荷侧资源的有效整合增强城市电网灵活调控能力，可实现ICPS-主网与城市电网-负荷协同基础上的高质量运营；4）提出定向调度ICPS低品质功率成分进入混改型网就地消纳的能量控制模式，和基于频率轨迹信息的电力系统等值惯性时间系数评估方法，可实现对ICPS一体化单元频率跌落态势的预估和负荷紧急备用的快速决策。.项目提出的新型场-网-荷协同消纳与运营模式，有助于挖掘系统各方灵活调节资源的潜能，从而实现ICPS、负荷和电网整体运行效能的提升。