Determination method for optimal proportion of power supply installation capacity and external power receiving

Abstract

The invention provides a determination method for optimal proportion of power supply installation capacity and external power receiving. The determination method comprises the steps of S1, acquiring forecast of a prospective annual load according to a power grid development plane; S2, taking minimum total power generation fuel consumption quantity of all power generator sets in a receiving-end power grid as a target function; S3, constructing a constraint condition by combining active power balance constraint, reactive power balance constraint, active power supply output constraint, reactive power supply output constraint and voltage constraint; S4, performing (N-1) verification and transient stability verification; and S5, solving the optimal proportion of the power supply installation capacity and the external power receiving capacity of a power grid at a receiving end by particle swarm optimization. The external power receiving optimal proportion is solved by a means combining a mathematical model and numerical simulation, the safe and stable running and the power supply demand of the power grid are ensured, a relation between the safety stability and the economy is balanced, sothat the comprehensive index is optimal.

Description

technical field [0001] The invention relates to the technical field of power supply, in particular to a method for determining the optimal ratio between the installed capacity of a power supply and external power received. Background technique [0002] At present, Shandong Power Grid urgently needs to increase the proportion of external power received. On the one hand, it is forced by the gap between power supply and demand, and on the other hand, it is out of consideration of reducing atmospheric emissions. However, the increase in the proportion of external power consumption can slow down the power gap and reduce waste gas emissions in the province, but further increase will increase the risk of failure of Shandong's power grid and large systems. power supply and security stability constraints. At the same time, the lack of sufficient stimulus for the economic development of the province will increase the possibility of electricity price increases. [0003] With the grad...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for determining the optimal ratio between the installed capacity of a power supply and external power, aiming at solving the problem in the prior art that the ratio of external power cannot be accurately set, realizing the calculation of the optimal ratio of external power, ensuring Safe and stable operation of power grid and power supply demand

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