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中国矿业大学电气学院,江苏省徐州市 221116
Received:30 September 2021,
Revised:2022-01-05,
Published Online:26 May 2022,
Published:10 January 2023
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韩丽,王晓静,鲁盼盼等.考虑风电功率预测误差分时补偿的电热联合系统多时间尺度调度[J].电力系统自动化,2023,47(1):74-85.
HAN Li,WANG Xiaojing,LU Panpan,et al.Multi-time-scale Dispatching of Integrated Electricity and Thermal System Considering Time-sharing Compensation of Wind Power Forecasting Error[J].Automation of Electric Power Systems,2023,47(1):74-85.
韩丽,王晓静,鲁盼盼等.考虑风电功率预测误差分时补偿的电热联合系统多时间尺度调度[J].电力系统自动化,2023,47(1):74-85. DOI: 10.7500/AEPS20210930007.
HAN Li,WANG Xiaojing,LU Panpan,et al.Multi-time-scale Dispatching of Integrated Electricity and Thermal System Considering Time-sharing Compensation of Wind Power Forecasting Error[J].Automation of Electric Power Systems,2023,47(1):74-85. DOI: 10.7500/AEPS20210930007.
由于风电具有不确定性,风电功率预测误差难以避免。热力系统具备储放热能力,通过调整热功率平移风电功率,可以降低风电功率预测误差的影响。但在风电并入电热联合系统时,风电变化频繁,热力系统具有较大惯性和延迟,难以与风电功率同步;同时,热力系统不同区域对电力系统指令的响应速度也不同。因此,为了解决利用热力系统补偿风电功率预测误差时响应时间不同步的问题,提出了一种考虑风电功率预测误差分时补偿的电热联合系统多时间尺度调度策略。首先,分析概率区间误差评估和实时预测误差评估的评估周期。然后,研究热力系统中供热区域和管网的时间特性。最后,在日前阶段利用响应速度较慢的供热区域补偿评估周期较长的概率区间误差,在实时阶段利用响应速度较快的管网补偿评估周期较短的实时预测误差,建立了多时间尺度调度模型。算例分析表明,所提策略实现了不同调度周期、不同预测误差评估周期、不同热力系统区域响应速度在时间上的匹配,减少了风电功率预测误差的影响,提高了系统的风电消纳能力。
Due to the uncertainty of wind power
wind power forecasting errors are unavoidable. The thermal system has the ability to store and release heat. By adjusting the thermal power to shift the wind power
the impact of wind power forecasting errors can be reduced. However
when the wind power is integrated into the integrated electricity and thermal system
the wind power changes frequently
and the thermal system has large inertia and delay
making it difficult to synchronize with the wind power; in addition
different areas of the thermal system respond differently to power system commands. Therefore
in order to solve the problem of non-synchronization of response time when using the thermal system to compensate wind power forecasting errors
a multi-time-scale dispatching strategy of the integrated electricity and thermal system that considers time-sharing compensation of wind power forecasting errors is proposed. First
the evaluation periods of the probability interval error evaluation and the real-time forecasting error evaluation are analyzed
and then the time characteristics of heating area and pipe network in the thermal system are studied. Finally
in the day-ahead stage
the heating area with a slower response speed is used to compensate the probability interval error with a longer evaluation period
and in the real-time stage
the pipeline network with a faster response speed is used to compensate for the real-time forecasting error with a short evaluation period. A multi-time-scale dispatching model is established. The analysis of calculation examples shows that the proposed strategy achieves the time matching of different dispatching periods
different forecasting error evaluation periods
and different response speeds of thermal system areas
which reduces the impact of wind power forecasting errors
and improves the wind power accommodation capacity of the system.
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