A Reactive Power Planning Method for Distribution Networks Considering Voltage Stability Constraints

Abstract

The invention relates to a power distribution network reactive planning method considering voltage stabilization constraints. The method comprises following steps of 1) acquiring reactive voltage control sections of an electrical system; 2) determining static voltage weak area and transient voltage weak area in the reactive voltage control sections, dividing the reactive voltage control sections into four types of regions, wherein the first type region does not belong to the static voltage weak area and transient voltage weak area, the second type region only belongs to the transient voltage weak area, the third type region only belongs to the static voltage weak area and the fourth type region belongs to the static voltage weak area and transient voltage weak area; and 3) carrying out reactive planning on the second type region, the third type region and the fourth type region, wherein transient reactive planning is considered in the second type region, static reactive planning is only considered in the third type region and transient reactive planning and static reactive planning are simultaneously considered in the fourth type region. According to the invention, the method is achieved based on a multi-target reactive planning model. Compared with the prior art, the method is advantaged by accuracy and reliability.

Description

technical field [0001] The invention relates to a reactive power planning method in power distribution system planning, in particular to a reactive power planning method for a distribution network considering voltage stability constraints. Background technique [0002] Many studies and practices have shown that the voltage of the distribution network has a great relationship with its reactive power. Reactive power is closely related to voltage stability, including static and transient voltage stability. Reasonable scheduling of reactive power in distribution network has far-reaching significance for maintaining the safety and stability of power system. Generally, voltage stability problems can be divided into static voltage stability problems and transient voltage stability problems according to different research time scales. [0003] For the problem of static reactive power planning, the current research has made more in-depth progress. The main research progress include...

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Problems solved by technology

[0004] Although the research on reactive power planning has achieved some results, the shortcomings of the current research are still obvious. First, there is no literature that simultaneously incorporates the static reactive power problem and the transient reactive power problem into the same optimization model, which leads to the current research on these two problems. There is still a lack of understanding of the relationship and difference between these reactive power problems, so building a multi-objective model for static / transient reactive power planning is a research idea worth trying; second, at present, the static / transient reactive power of different power sources is still mainly In fact, due to the regional characteristics of reactive power, the calculation of reactive power configuration according to the control partition has stronger physical meaning

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