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Electric power system robust economic dispatching method based on worst scene identification

An economic dispatch and power system technology, applied in photovoltaic power generation, electrical components, circuit devices, etc., can solve problems such as affecting economy

Active Publication Date: 2020-09-25
STATE GRID QINGHAI ELECTRIC POWER +1
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Problems solved by technology

Units need to pay corresponding costs for providing reserve capacity, but unlike power generation, if the reserve capacity is not used, it will not bring direct benefits to the operator and affect the economy of operation

Method used

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  • Electric power system robust economic dispatching method based on worst scene identification
  • Electric power system robust economic dispatching method based on worst scene identification
  • Electric power system robust economic dispatching method based on worst scene identification

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Embodiment Construction

[0114] The method for robust economic dispatching of power systems based on worst-case scenario identification proposed by the present invention includes the following steps:

[0115] (1) Establish a robust economic dispatch model considering security constraints

[0116] Traditional economic models considering generation and reserve planning can be divided into two steps: unit generation planning and unit reserve allocation. The economic scheduling model in this paper adopts the rolling scheduling model, that is, the current time arranges the scheduling plan from the next time to 24:00, and the scheduling is carried out sequentially. The mathematical model is as follows:

[0117] 3. Objective function

[0118]

[0119] The meanings of decision variables and parameters in formula (1) are as follows:

[0120] F - total cost;

[0121] d i —the backup cost coefficient of hydroelectric unit i;

[0122] ——decision variable, reserve capacity of hydroelectric unit i

[012...

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Abstract

The invention relates to a power system robust economic dispatching method, in particular to an electric power system robust economic dispatching method based on worst scene identification, and belongs to the technical field of energy economic calculation. According to the invention, a robust optimization method is adopted to research an economic dispatching scheme of a power system so as to improve the safety and reliability of the system operation. The specific technology comprises the steps of establishing an economic dispatch model based on security constraints, establishing a robust economic dispatch model based on worst scene identification and solving the robust economic dispatch model, namely firstly, according to various operation safety constraints of the power system, establishing the economic dispatching model considering the safety constraints; then, establishing the robust economic dispatch model based on worst scene identification, wherein the model is divided into an upper layer and a lower layer, the upper layer is a joint economic dispatch problem, and the lower layer is a robust feasibility detection problem; and finally, solving the robust economic dispatch model efficiently by means of an alternate iteration method, a bilinear programming algorithm and the like. The method has the advantages of being efficient and simple in calculation, being easy to put into engineering practice and the like.

Description

technical field [0001] The invention relates to a method for robust economic dispatching of a power system, in particular to a method for robust economic dispatching of a power system based on worst-case scenario identification, and belongs to the technical field of energy economic calculation. Background technique [0002] In the daily operation of the power system, in order to ensure the safe operation of the power grid, the unit output must be adjusted or corrected in real time according to the actual operating conditions to ensure the balance of energy supply and demand. Economic dispatch is an important supplement to the day-ahead power generation plan and an important means to achieve real-time energy balance. The core of economic dispatch is to realize the economic distribution of active power among units on the basis of ensuring energy balance and operation constraints. In economic dispatching, dispatchers not only need to keep the system frequency near the rated va...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/46
CPCH02J3/008H02J3/466H02J3/381H02J2203/10H02J2203/20H02J2300/20H02J2300/24H02J2300/28Y02E10/56
Inventor 董凌李延和梅生伟魏韡陈来军曹阳王茂春陈春萌徐有蕊
Owner STATE GRID QINGHAI ELECTRIC POWER
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