Distribution network reactive voltage control method taking distributed generation optimal configuration into consideration

Abstract

The invention discloses a distribution network reactive voltage control method taking distributed generation optimal configuration into consideration and relates to the technical field of operation and control of power distribution systems to which distributed generations access. The method comprises steps of firstly calculating the optimal access capacity and the optical power factor value of each bus accessing to a distributed generation (DG); performing optimal configuration of an intermittent DG; and performing voltage comprehensive control of a configured distribution network, wherein firstly the reactive compensation capacity for reaching target voltage is determined, and according to values of reactive compensation capacities QiC determined under different conditions, the voltage control process that inverter power factor adjustment is performed firstly, reactive compensation device adjustment serves as supplement and main transformer tap position adjustment serves as final guarantee is performed. According to the invention, the inverter power factor adjustment is fully utilized to adjust distribution network node voltage, being reliable and economic, and active output of the distributed generation and economic benefits of users are free of influences.

Description

technical field [0001] The invention relates to the technical field of power distribution system operation and control for distributed power access. Background technique [0002] Electricity is a very important secondary energy source in today's society and plays an important role in the development of society. In the normal operation state of the power system, the load will change at any time. In order to ensure the safety and reliability of the power system operation and the user's demand for power quality, control means must be adopted to regulate and control the system. In recent years, with the construction of smart distribution network and the concept of energy saving and environmental protection, people have more and more researches on renewable energy, and more and more distributed power generation (referred to as DG) connected to the distribution network. The DG operation mode is flexible, environment-friendly, and can effectively increase the node voltage of the a...

AI Technical Summary

Problems solved by technology

This model assumes that the load is distributed along a certain law, but the load distribution in the actual power grid is often random; some researchers have discussed the optimal planning problem of distributed power generation under the condition that the existing network load value and the number of load points are unchanged, The situation of network expansion is not considered; some researchers have also analyzed the influence of different forms of DG grid connection on the voltage distribution of the feeder section, but did not give a detailed change law, or by analyzing the influence of DG on the voltage distribution of the distribution network, summed up DG correct access location and output limitation and other operating rules, but these studies have not further explored how to effectively use comprehensive voltage adjustment measures to achieve the purpose of improving voltage after analyzing the impact of DG on the distribution network voltage

The access of DG makes the power parameters of the whole system change, and the operation control becomes complicated. Especially for the distribution network voltage, if it is not properly controlled and adjusted, and it is allowed to connect and exit at will, it will be difficult to ensure that the distribution network voltage is qualified. , good power quality

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