Evaluating method of supply adequacy of power transmission network load and on-line evaluating system

Abstract

The invention provides an evaluating method of supply adequacy of a power transmission network load and an on-line evaluating system. The evaluating method comprises the following steps that: step S1, power grid model data and power generation and transmission equipment running state data of a tested power transmission network system are obtained; step S2, a power generation planning object and a constraint model are set; step S3, Ld is set to be equal to Ld0; step S4, a progressively increasing step length delta of a load is set, wherein the delta is larger than 0 and is less than 1; step S5, when a load of an evaluated object is Ld, whether a power transmission network set generating plan that enables an objective function of a power generation planning object to meet all constraint conditions contained by the constraint model exists is determined; if so, a step S6 is executed; and if not, a step S7 is executed; the step S6, the following formula is set: Ld=Ld+Ld0*(1+delta) and then the step S5 is executed; and the step S7, a value of a maximum available load Ldmax of the evaluated object is obtained by using a formula: Ld-Ld0* (1+delta) and a load supply adequacy eta of the tested object is Ldmax / Ld0 by calculation, so that he evaluation is completed. According to the invention, the provided method and system can be applied to load supply adequacy evaluation at a bus level, a zone level and a system level; and evaluation analyzing at different angles can be provided for the power grid dispatching operating personnel.

Description

technical field [0001] The invention relates to the field of electric power dispatching automation, in particular to a load supply adequacy evaluation method and an online evaluation system of a transmission network. Background technique [0002] The important goals of short-term dispatch plan optimization are to ensure the safe operation of power system equipment, reliable and high-quality power supply for users, and optimal allocation of power resources. Among them, the maintenance plan optimization is used to ensure the safety of equipment, optimize the grid topology, and provide sufficient margin space for the reliable operation of the grid; the optimization of the power generation plan is based on the premise of ensuring the balance of power generation and consumption, considering the grid transmission security and other constraints, according to various Predetermined goals optimize the allocation of power generation resources, and optimize the preparation of short-term...

AI Technical Summary

Problems solved by technology

First, it is only applicable to the adequacy assessment for a single bus

Secondly, the growth of electricity load has a strong correlation, and the load supply adequacy index obtained when other loads are assumed to be stationary lacks practical scenarios, and the evaluation results are difficult to use

Finally, the equal-proportional power generation capacity adjustment mode adopted when the load increases is too simple, and the evaluation indicators are often too conservative

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