Distribution network reconstruction method by considering small signal stability of comprehensive energy system

Abstract

The present invention discloses a distribution network reconstruction method by considering the small signal stability of a comprehensive energy system. The method mainly comprises the steps that: ina region-class comprehensive energy system, the influence of the distribution network reconstruction of various power sources and the small signal stability of the system is considered, a respective small signal stability model is established for various types of power sources in the comprehensive energy system, a final comprehensive energy system model is formed through transformation of coordinates, the small signal stability is added into the distribution network reconstruction constraint, and wind power and photovoltaic output is arranged in a situation when the system operation is the most unstable, so that it is ensured that the comprehensive energy system is more economically operated on the basis of meeting the small signal stability.

Description

Technical field: [0001] The invention relates to the field of power transmission and transformation, in particular to a distribution network reconfiguration method considering the small disturbance and stability of an integrated energy system. Background technique: [0002] With the development of society and the improvement of people's living standards, people's demand for energy is gradually increasing. Continued development and utilization of limited fossil energy will not only cause environmental pollution, but also lead to energy depletion and energy crisis. The development and utilization of clean renewable energy and the improvement of energy utilization have become effective means to solve the problems of environmental pollution and energy crisis. In recent years, researchers' research and application of renewable energy generation technologies such as wind and light have effectively alleviated the above problems. In addition, the proposal of an integrated energy s...

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Problems solved by technology

If the distribution network reconstruction only considers the economy, it is very likely that some power supplies cannot operate stably, resulting in off-grid

In addition, the output of wind power and photovoltaics is random, and the uncertainty of their output will inevitably lead to changes in the power flow and node voltage in the system, thereby affecting the electromagnetic power of the unit, making the unit in the distribution network constantly subject to small disturbances and stable Due to the different small-disturbance stability of various power sources, the network structure after the reconfiguration of the distribution network will have a positive or negative impact on the small-disturbance stability of the system.

In the prior art, there is a distribution network reconfiguration method to ensure the small disturbance and stability of distributed power sources, but all power sources are regarded as synchronous machines, and various types of power sources are not distinguished

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