Distribution network power supply capability analysis system, method, and computer readable storage medium

Abstract

The invention discloses a distribution network power supply capability analysis system, method, and a computer readable storage medium. A power-side photovoltaic and wind power output uncertainty characterization model is established; load-side fixed loads, distributed energy storage loads and electric vehicle loads are classified according to classes at the same time to establish uncertainty characterization model; a distribution network power supply capability evaluation model is then established; in combination of distributed power access and the impacts of different loads on the distribution network power supply capability, the more accurate maximum power supply capability of the distribution network is obtained; and the random characteristics after the distributed photovoltaic wind power is accessed to the distribution network are comprehensively considered, an accurate and effective distribution network power supply capacity evaluation system is established, the subsequent powersupply quality and the power supply reliability are effectively ensured, and the safety and the economics of network operation are enhanced.

Description

technical field [0001] The present invention relates to the field of distribution network, in particular to a distribution network power supply capacity analysis system, method and computer-readable storage medium. Background technique [0002] As the main load center of the power system, the distribution network is to provide the power transmitted by the transmission network to the end users in the form of high-quality electric energy. With the rapid development of the economy, the regional electricity load will continue to rise. For example, on July 11, 2016, the maximum load of the power grid in Beijing reached 19.369 million kilowatts, breaking through the historical maximum load of 18.566 million kilowatts, with a growth rate of 4.3%. Compared with the power generation and transmission links of the power system, the investment and construction of the distribution network often lags behind the growth of the load, resulting in adverse consequences such as obsolete equipme...

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Problems solved by technology

Although the access of distributed photovoltaic wind power to the distribution network has effectively improved the load supply capacity of the distribution network, thereby relieving the power supply pressure of the distribution network to a certain extent; however, the randomness of distributed power has caused uncertainty to the distribution network. Sexual impact: (1) Whether the configuration of photovoltaic and wind power in the distribution network is reasonable or not directly affects the network loss level and voltage level of the system, thus indirectly affecting the constraints of the power supply capacity evaluation model

(2) The access of distributed power sources may change the direction of the power flow in the system, thereby increasing the power distribution point of the line, affecting the convergence and error of the power flow and the configuration of relay protection transposition

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