A two-layer economic optimal scheduling method for embedded network loss considering resistance

Abstract

The invention discloses a two-layer economic optimizing and scheduling method for calculating embedded transmission losses of a resistor. The method aims to change the current situation that in current power system scheduling, transmission loss influence is ignored, or the transmission losses cannot be considered accurately, a two-layer power system unit combination model based on embedded transmission losses of Benders decomposition is provided based on the method of calculating the modified direct-current tides of the resistor, the upper-layer decision (master problem) does not consider network safety to carry out unit combination, the lower-layer decision (sleeve problem) is based on the provided method of calculating the modified direct-current tides of the resistor, network safety is verified, meanwhile, the system embedded transmission losses can be optimized, and the embedded transmission loss method improves the precision and speed of the system for considering the transmission losses. Refinement and efficiency of power system scheduling are achieved.

Description

technical field [0001] The invention belongs to the field of economic dispatching of power systems, in particular to a unit combination method involving embedded network loss. Background technique [0002] It is known that the precision and efficiency of the economic dispatch of the power system determine the security and economy of the system. Network loss accounts for about 1%-2% of the load in the transmission network, which has a certain impact on system operation, but at present, most of the actual dispatching does not consider network loss, which does not conform to the actual operation situation. Moreover, the current access to large-scale new energy makes some current methods that take into account network losses no longer applicable, such as using historical data to form the corresponding B coefficient method. Due to the uncertainty and volatility of new energy, its accuracy is questionable . [0003] At present, there are mainly two types of power flow in economi...

AI Technical Summary

Problems solved by technology

Network loss accounts for about 1%-2% of the load in the transmission network, which has a certain impact on system operation, but at present, most of the actual dispatching does not consider network loss, which does not conform to the actual operation situation

Moreover, the current access to large-scale new energy makes some current methods that take into account network loss no longer applicable. For example, using historical data to form the corresponding B coefficient method, due to the uncertainty and volatility of new energy, its accuracy is questionable

[0003] At present, there are mainly two types of power flow in economic dispatching: DC power flow and AC power flow. Due to its nonlinear characteristics, AC power flow may have disadvantages such as non-convergence and slow calculation in system scheduling; while DC power flow ignores system network loss. There will be a large deviation from the actual operation

Therefore, considering the impact of network loss in system scheduling is not only imminent, but also difficult

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