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基于安全约束机组组合的中长期电量安全校核两阶段优化
作者:
作者单位:

1.南瑞集团有限公司(国网电力科学研究院有限公司),江苏省南京市 211106;2.智能电网保护与运行控制国家重点实验室,江苏省南京市 211106;3.国网江苏省电力有限公司,江苏省南京市 210024

作者简介:

通讯作者:

基金项目:

国家重点研发计划资助项目(2016YFB0900500);国家电网有限公司科技项目。


Two-stage Optimization Method for Medium- and Long-term Electricity Security Check Based on Security-Constrained Unit Commitment
Author:
Affiliation:

1.NARI Group Corporation (State Grid Electric Power Research Institute), Nanjing 211106, China;2.State Key Laboratory of Smart Grid Protection and Control, Nanjing 211106, China;3.State Grid Jiangsu Electric Power Co. Ltd., Nanjing 210024, China

Fund Project:

This work is supported by National Key R&D Program of China (No. 2016YFB0900500) and State Grid Corporation of China.

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    摘要:

    为量化评估中长期电量计划和交易合同可能对电网运行带来的安全风险,解决电量合同执行的受限因素定位与调整难题,提出了一种基于安全约束机组组合的中长期电量安全校核两阶段优化方法。阶段1严格考虑电厂的电量约束,以断面潮流越限量最小为目标建立电量校核优化模型,获得电量约束下的最优机组组合方案;阶段2则考虑电网运行约束,建立电量校正优化模型,通过调整机组组合方案来消除断面越限。通过统筹电力电量平衡和电网安全的两阶段优化调度,获得电量计划的可执行性结论,以及不可行时的原因定位和调整方案。实际系统算例分析验证了该方法的有效性和实用性。

    Abstract:

    A two-stage optimization method for medium- and long-term electricity security check based on security-constrained unit commitment (SCUC) is proposed to quantify and evaluate the security risks that the medium- and long-term electricity plan and trading contract may bring to the operation of power grid, and to solve the problems of locating and adjustment of the restrictive factors in the implementation of the electric quantity contract. In the first stage, the electricity quantity constraints of the power plant are strictly analyzed. In order to minimize the interface power flow over-limit, the optimization model of electricity security check is established to obtain the optimal unit commitment result. In the second stage, the power grid operation constraints are considered and the optimization model of power calibration is established to eliminate the interface over-limit by adjusting the unit commitment schemes. Through coordinating the two-stage optimal dispatching of power balance and power grid security, it is available to acquire the executable conclusion of electricity contract as well as the orientation of causes and adjustment schemes when it is not feasible. The effectiveness and practicability of the method are verified by the analysis of practical system examples.

    图1 安全校核的断面负载率统计结果Fig.1 Statistical result of section load rate after security check
    图2 安全校正的电厂电量完成率优化结果Fig.2 Optimization result of plant energy completion rate after security correction
    图3 两阶段计算的断面潮流比较Fig.3 Comparison of section power flow for two-stage calculation
    图 阶段优化原理示意图Fig. Diagram of two-stage optimization principle
    图 两阶段优化计算流程图Fig. Flow chart of two-stage optimization calculation
    图 年度系统负荷预测曲线Fig. Forecasting curve of annual system load
    图 电厂年度分月电量计划Fig. Monthly electric quantity for power plant
    图 安全校正的断面负载率统计结果Fig. Statistical result of section load rate after security correction
    图 电厂月度计划电量与优化电量对比图Fig. Comparison chart of monthly planned energy and optimal energy of power plant
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引用本文

李利利,汪志成,王岗,等.基于安全约束机组组合的中长期电量安全校核两阶段优化[J/OL].电力系统自动化,http://doi.org/10.7500/AEPS20190313005.
LI Lili,WANG Zhicheng,WANG Gang,et al.Two-stage Optimization Method for Medium- and Long-term Electricity Security Check Based on Security-Constrained Unit Commitment[J/OL].Automation of Electric Power Systems,http://doi.org/10.7500/AEPS20190313005.

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历史
  • 收稿日期:2019-03-13
  • 最后修改日期:2020-04-13
  • 录用日期:2020-02-14
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