Energy management method considering random forecast error of independent microgrid

A prediction error and energy management technology, which is applied in the field of independent microgrid energy management considering the random prediction error of load and renewable energy power, can solve the research on random prediction error, the accumulation of prediction error and the improvement of adverse effects There are still few problems, to achieve the effect of overcoming adverse effects, reliable operation, and economical operation

Inactive Publication Date: 2019-04-12
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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Problems solved by technology

Although there are many research results above, there are still few studies on the accumulation of forecast errors

Method used

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  • Energy management method considering random forecast error of independent microgrid
  • Energy management method considering random forecast error of independent microgrid
  • Energy management method considering random forecast error of independent microgrid

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[0040] The preferred embodiments of the present invention will be described in further detail below.

[0041] Such as figure 1 As shown, an independent microgrid energy management method considering random prediction errors includes the following steps:

[0042] (1) The energy management system EMS predicts the power of load and renewable energy (wind power, photovoltaic) in the future;

[0043] (2) Use CPLEX for optimization, specify the day-ahead operation plan, and the micro power supply (micro-gas turbine and energy storage battery) will operate as planned;

[0044] (3) EMS monitors the SOC status of energy storage batteries in real time, measures the actual power generation of wind power and photovoltaics, and measures the actual power of micro-gas turbines and energy storage batteries; according to the predicted and actual monitored power, the net load random prediction error is the actual Operating error

[0045] (4) Determine the net load random prediction error threshold ε ac...

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Abstract

The invention provides an energy management method considering a random forecast error of an independent microgrid. The independent microgrid comprises a wind power-photovoltaic-micro gas turbine-energy storage battery and an energy management system (EMS), wherein the EMS is used for monitoring a state-of-charge (SOC) state of the energy storage battery in real time, monitoring wind power and photovoltaic actual generation power and measuring actual powers of the micro gas turbine and the energy storage battery, a random forecast error of a net load is obtained according to powers which are forecasted and actually monitored, the contribution of the controllable micro gas turbine and the energy storage battery are arranged and adjusted by a multi-variable and multi-constraint mathematicaloptimization method and a set process according to the size of the random forecast error of the net load, so that the energy storage battery normally runs. According to the method provided by the technical scheme, the unfavorable influence brought by the forecast error of the load and a regenerative energy power is overcome, the contribution of the controllable micro source and energy storage arearranged and adjusted by the mathematical optimization method according to the size of the random forecast error of the net load, and stable, reliable and economic running of the microgrid is achieved.

Description

technical field [0001] The invention belongs to the technical field of power dispatching and management, and relates to an independent microgrid energy management method considering random prediction errors, in particular to an independent microgrid energy management method considering random prediction errors of load and renewable energy power. Background technique [0002] Microgrid is a basic structure of smart grid, which can easily access distributed renewable energy and work reliably in networked and isolated states. In order to achieve long-term stable and economical operation of uncontrollable micro-power sources such as photovoltaics and wind power, controllable micro-power sources such as micro-gas turbines and energy storage, and user loads in micro-grids, energy management systems are usually required for coordinated management. At present, the microgrid often determines the day-ahead plan after optimization based on the predicted renewable energy generation powe...

Claims

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Application Information

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IPC IPC(8): H02J3/46H02J3/32
CPCH02J3/32H02J3/46H02J2203/20Y02E70/30Y02E10/56Y02E10/76
Inventor 陈亚红和军平陶耀东
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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