| 引用本文: | 王 韶,谭 文,黄 晗.计及微电网中可再生能源间歇性影响的配电网可靠性评估[J].电力自动化设备,2015,35(4): |
| WANG Shao,TAN Wen,HUANG Han.Distribution system reliability evaluation considering influence of intermittent renewable energy sources for microgrid[J].Electric Power Automation Equipment,2015,35(4): |
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| 摘要: |
| 为分析微电网中可再生能源分布式电源（DG）的间歇性对供电可靠性的影响，运用马尔科夫方法在计及负荷重要性的多个负荷水平下建立由间歇性DG和储能装置组成的微电源的输出功率多状态模型，根据该模型和微电网孤岛运行时的功率平衡关系，提出微电网中每个负荷点的微电源输出功率的两状态模型。基于微电源两状态模型，提出一种含微电网的配电网可靠性评估方法和评价微电源持续供电能力的新指标。算例验证了所提方法的可行性和有效性。结果表明，微电网网内用户的供电概率得到提高，但在计及DG出力间歇性时，用户的平均停电次数指标有恶化的趋势；合理配置储能装置的容量及最大出力，能改善间歇性DG出力对微电网用户持续供电能力的不利影响。 |
| 关键词: 微电网 配电 分布式电源 间歇性 储能 马尔科夫方法 可靠性 评估 |
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| 基金项目:国家高技术研究发展计划（863计划）资助项目（2011-AA05A107） |
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| Distribution system reliability evaluation considering influence of intermittent renewable energy sources for microgrid |
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WANG Shao, TAN Wen, HUANG Han
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State Key Laboratory of Power Transmission Equipment & System Security and New Technology， Chongqing University，Chongqing 400044，China）
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| Abstract: |
| Based on the Markov method，a multi-state power output model is built for a microgrid with intermittent renewable resources DG（Distributed Generation），energy storage device and multiple loads to analyze the influence of DG’s intermittence on the power supply reliability，which considers different load importance levels. According to the power balance equation of microgrid in island mode and based on the built model，the bi-state power output model is built for each load point in microgrid，a method of reliability evaluation is proposed for the distribution network with microgrid，and the indices for evaluating the continuous power supply ability of micro power source are given. Case calculation verifies the feasibility and effectiveness of the proposed method，showing that，the power supply probability for users in the microgrid is improved，the average user outage rate is deteriorated when the intermittence of DG is considered，and the rational capacity and maximum output power configuration of the energy storage device can relieve the impact of DG’s intermittence on the continuous power supply ability. |
| Key words: microgrid electric power distribution distributed generation intermittence energy storage Markov method reliability evaluation |
