电网多环节系统可靠性评估

发布时间：2018-01-07 19:07

本文关键词：电网多环节系统可靠性评估　出处：《华南理工大学》2014年硕士论文　论文类型：学位论文

【摘要】：根据“统一调度、分级管理”原则，电网系统可被划分为省级电网、地级电网和配电网三个传输环节。多环节系统可靠性是指由电源向负荷，，经过各个传输环节逐级传递，最终以供电可靠性指标来表征。客观定量评估电网多环节系统可靠性，能够深入挖掘输电网与配电网之间的作用机理，全面量化输电网的可靠性水平对配电网可靠性的影响，全局把握电网的整体运行状况以实现安全、稳定、可靠的运行目标。为此，本文所完成的主要工作和成果如下： 1）以传统电网稳态充裕度评估理论为基础，提出了新的算法和运算技术来保证计算精度的同时提高评估速度。以回路作为基本单位构建预想事故集合，并提出烟囱排序算法进一步减少无效的系统状态；针对发电机故障状态下机组再调度问题，提出按比例分配的经济方案并确保发电机在出力范围内；校正措施模型采用基于交流潮流的最优负荷削减模型；基于以上理论，充分挖掘当前计算机信息处理技术的潜力，研发大电网稳态充裕度评估软件系统，并以IEEE RTS-79为算例验证算法的有效性。 2）提出基于网络等值的电网多环节系统可靠性评估方法。从网络结构角度看，输电网与配电网是电网多环节系统的有机组成部分，基于负荷-电源等值原则，将输电网负荷点指标传递至配电网作为输入参数；综合运用网络可达性理论与Warshall算法，实现多环节系统可靠性高效、科学的评估。以IEEE RTS-79和RBTS-BUS6相结合的完整电网系统作为算例，验证了所提方法的实用性和可操作性，并得出实用化结论，为电网运行规划人员提供快速有效的决策指导。 3）提出了基于微分传递的电网多环节系统可靠性灵敏度分析方法。首先建立可靠性指标函数；在负荷-电源等值模型基础上，依据复合函数求导法则进行微分传递，推导系统可靠性指标对输电网/配电网设备可靠性参数的灵敏度计算解析式；以IEEERTS-79和改进的RBTS-BUS6相结合的完整电网系统为算例验证所提方法可有效探明系统的薄弱环节，为制定和完善电网可靠性控制措施、科学决策电网规划方案提供理论支持和意见指导。本文研究工作得到“以多环节综合互动为特征的智能电网综合示范工程”国家支撑计划（2013BAA01B02）的资助。
[Abstract]:According to the "unified classification management" principle, the grid system can be divided into the provincial power grid, power grid and the level distribution network transmission link. The reliability of multi link system is defined by the power supply to the load, after each transmission link transfer step by step, and ultimately to the power supply reliability indices. The reliability of grid multi link system can objectively and quantitatively evaluate. Dig the mechanism between the transmission network and distribution network, affect the reliability level of comprehensive quantitative transmission system and the reliability of the distribution network, the overall grasp of the overall power grid to achieve a safe, stable and reliable operation of the target. Therefore, the main work and achievements of this paper are as follows:
1) based on the traditional steady-state adequacy evaluation theory, this paper puts forward a new algorithm and computing technology to ensure and improve its calculation accuracy evaluation speed. On the loop as the basic unit of construction of the contingency set, and proposes the chimney sorting algorithm further reduce the invalid system status; the generator fault condition and scheduling problem is proposed the economic plan and ensure the proportion of the output range of the generator; correction measures model using optimal load reduction model based on AC power flow; based on the above theory, fully tap the current computer information processing technology research and development potential, the steady-state adequacy evaluation software system, and to IEEE RTS-79 for example to verify the effectiveness of the algorithm.
2) the reliability evaluation methods of power grid network equivalent multi link system is proposed. From the perspective of network structure, transmission network and distribution network is the organic part of the grid multi link system, based on the principle of equivalent power load, load point index transmission network transfer to the distribution network as input parameters; using Network Accessibility Theory and Warshall algorithm, realize multi link system reliability efficient, scientific assessment. A complete grid system by combining IEEE RTS-79 and RBTS-BUS6 as an example, the proposed method is practical and operability, and draw practical conclusions, provide fast and effective decision-making guidance for operation personnel planning grid.
3) method is proposed to analyze the differential transmission grid multi link system reliability based on the sensitivity of reliability index. The first function is established; based on the equivalent model of power load, based on the composite function derivation rule of differential transmission, derivation of system reliability index of transmission / distribution network equipment reliability parameter sensitivity analysis formula to calculate the complete power system; based on IEEERTS-79 and improved RBTS-BUS6 for example to verify the proposed method can effectively explore the weak links of the system and to develop and improve the reliability of power grid control measures to provide theoretical support and guidance of scientific decision-making power network planning.
The research work is supported by the national support plan (2013BAA01B02) of "comprehensive demonstration project of intelligent power grid characterized by multi link and comprehensive interaction".

【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM732

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