A Robust Economic Dispatch Method of Power System Based on Worst Scenario 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: 2022-02-11
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
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[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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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. The invention adopts the robust optimization method to study the economical dispatching scheme of the electric power system, so as to improve the safety and reliability of the system operation. The specific techniques include establishment of economic dispatch model based on security constraints, establishment of robust economic dispatch model based on worst-case scenario identification, and robust economic dispatch model solution method. Firstly, according to the operation security constraints of the power system, an economic dispatch model considering the security constraints is established. Subsequently, a robust economic dispatch model based on worst-case scenario identification is established. The model is divided into upper and lower layers. The upper layer is the joint economic dispatch problem, and the lower layer is the robust feasibility detection problem. Finally, the robust economic dispatch model is efficiently solved by alternate iterative methods, bilinear programming algorithms, etc., which has many advantages such as efficient and simple calculation, and easy to put into engineering practice.
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...
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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