Comprehensive energy system scheduling method of dynamic time interval

An integrated energy system and dynamic time technology, applied in resources, instruments, data processing applications, etc., can solve problems such as scheduling methods that are rarely considered

Active Publication Date: 2019-11-29
NANJING UNIV OF TECH
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Problems solved by technology

[0003] At this stage, most of the scheduling research on integrated energy systems is based on fixed time intervals, optimizing system day-ahead/intra-day scheduling strategies. In terms of scheduling methods based on mod

Method used

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  • Comprehensive energy system scheduling method of dynamic time interval
  • Comprehensive energy system scheduling method of dynamic time interval
  • Comprehensive energy system scheduling method of dynamic time interval

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Embodiment 1

[0046] In terms of optimal dispatching of integrated energy systems, the current research can be based on the establishment of physical models of equipment for independent units and coupled units, economic models, and steady-state power flow models for power, natural gas, and thermal energy subsystems. The comprehensive energy optimal dispatch of specific systems such as heat can also form an optimal regulation strategy including energy conversion equipment. For the uncertainty of renewable energy such as wind power, it can also perform robust collaborative dispatch optimization, and it can also be mined through price information. However, most of these optimization scheduling methods are for optimal scheduling control of a certain time section or multiple time periods, and are still static optimization. Aiming at the fast dynamic and slow dynamic characteristics of electric power system, natural gas system, and thermal system at different time scales, there are also related st...

Embodiment 2

[0119] refer to image 3 , which is an example test system of an integrated energy system based on the improved IEEE 14-node distribution network system, 11-node natural gas distribution system, and 11-node thermal system, that is, the test example diagram. The natural gas flow rate is converted to the success rate unit according to the natural gas calorific value, and the day-ahead scheduling plan refers to Figure 4 , which is the day-ahead scheduling scheme of the dynamic time interval integrated energy system scheduling method in the test example. The day-ahead scheduling plan is also the reference trajectory of the intraday scheduling plan. The intraday scheduling plan is obtained based on the scheduling method. Refer to Figure 5 For illustration, take the intraday scheduling results in the time period of 18:00-20:45 as a display.

[0120] When the state error of the system is small, it can reduce the issuance of scheduling instructions and reduce the scheduling cost. ...

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Abstract

The invention discloses a comprehensive energy system scheduling method for a dynamic time interval, and the method comprises the following steps: establishing a comprehensive energy system schedulingframework based on the prediction control of a dynamic time interval model; establishing a comprehensive energy system day-ahead scheduling model; establishing an intra-day scheduling 'track deviation-control energy-control cost ' performance index based on model prediction control; establishing a dynamic time interval decision index; and establishing an energy conversion unit, a heat supply network model, a gas network model and a power grid model. The comprehensive energy system scheduling method has the beneficial effects that the dynamic time interval comprehensive energy system scheduling method taking trajectory deviation-control energy-control cost as a performance index is considered, so that the performance index has enough adjustable margin, and different scene requirements aremet; the dynamic time interval decision index is considered, the real state that the system is about to generate or even has a large error can be reflected, and the decision index is provided for judging whether the system needs to issue a scheduling instruction.

Description

technical field [0001] The invention relates to the technical field of integrated energy system scheduling, in particular to an integrated energy system scheduling method based on a dynamic time interval model dynamic time interval. Background technique [0002] With the massive access of renewable energy, the integrated energy system is an important way to achieve efficient energy utilization. The optimal scheduling of integrated energy systems is a key technology to realize the coordinated and complementary utilization of various energy sources. In optimal dispatching, the accuracy of the dispatching plan largely depends on the accuracy of load forecasting within the dispatching period, and there is inevitably a certain error in the net load forecasting, which increases with the increase of the dispatching period. The impact of can be reduced by dividing the scheduling period. However, the power network, natural gas network and thermal network have different response spe...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0631G06Q50/06
Inventor 窦迅王俊
Owner NANJING UNIV OF TECH
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