Intraday dispatching optimization method

An optimization method and rolling optimization technology, applied in the direction of instruments, data processing applications, information technology support systems, etc., can solve the problems of lack of connection between planning and real-time scheduling, and less economic scheduling.

Inactive Publication Date: 2012-07-11
NORTH CHINA GRID +1
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Problems solved by technology

[0005] In order to solve the problems in the prior art that the dispatchers adjust the active power value of the unit according to the system frequency or ACE fluctuations during the dispatching operation of the power system, less consideration is given to economic dispatching, and there is no connection process between the pre-established plan and real-time dispatching , the present invention provides an intraday scheduling optimization method for formulating the real-time power of intraday units by effectively combining the day-ahead plan and the intraday plan rolling adjustment

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[0041] The present invention will be further described below with reference to the accompanying drawings.

[0042] like Figure 1-2 As shown in the figure, an intraday scheduling optimization method is characterized in that: it comprises the following steps:

[0043] 1. Different optimization cycle ranges are used in intraday scheduling. The unit output plan is optimized on a rolling basis during the day, and a combination of long-cycle optimization and short-cycle optimization is used for optimization. In the short-period optimization, only the unit safety-constrained economic dispatch is considered, and in the long-period optimization, the combination of the safety-constrained unit combination and the unit safety-constrained economic dispatch is used.

[0044] 2. Automatically extract the basic data required for optimization. Determine the time range for long-cycle optimization and short-cycle optimization, and obtain the corresponding intra-cycle load forecast, maintenan...

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Abstract

The invention discloses an intraday dispatching optimization method, which belongs to the technical field of electric power system dispatching automation. The method comprises the steps of obtaining various types of optimized data, determining optimization space of a long period and a short period, then establishing a security constraint unit combined model with lowest cost according to the model of a practical electric network and electric network normal position composition overhaul, working out the start and stop state of the unit within a dispatching period and the active power output of the unit by adopting mixed integer programming, taking all network monitoring elements into account to performing security checking aiming at all load points, and finally obtaining intraday dispatching results meeting the electric network security through the iteration of the optimization technology and the security checking. By adopting the method, economic dispatch can be realized within a larger range, the prevention and the control to electric network operation risk can be realized within a longer time period, and the large electric network control capability and the electricity resource optimizing configuration capability are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of power system dispatch automation, and in particular relates to an optimization method for intra-day unit combination and economic dispatch. Background technique [0002] With the advancement of smart grid construction, the requirements for the optimal allocation of power grid resources are constantly increasing, which puts forward higher requirements for dispatching operation and dispatching plans. The traditional scheduling plan is mostly limited to the day-ahead plan, and the dispatcher starts real-time scheduling after entering the day. There is no bridge between pre-made plans and real-time scheduling. Therefore, a scheduling method is needed to coordinate the transition from day-ahead scheduling to real-time scheduling. [0003] There is always a difference between the expected results and the actual situation during the operation of the power system, such as load changes, unit start-stop time, pow...

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06
CPCY04S10/545Y04S10/54Y02E40/76Y02E40/70Y04S10/50
Inventor 陈之栩张涛杨争林徐帆丁恰涂孟夫
Owner NORTH CHINA GRID
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