Abstract
This paper proposes a heuristic method for optimization of reactive power compensation. Firstly, two fuzzy sets of node voltage and cost savings are formed. The compensation location with the greatest compensation suitability is obtained by fuzzy reasoning. Considering the operation modes of several different loads, the mathematical model of reactive power compensation optimization is established, and fuzzy multi-objective optimization is adopted. The method solves the fixed and variable compensation capacity, and calculates the compensation capacity for each existing compensation position cycle until the change does not occur. The above process is repeated until the new compensation position is no longer saved, and finally all the compensation positions, capacity and total savings can be obtained. The example analysis shows the effectiveness and practicability of the method.
Highlights
The reactive power compensation of the distribution network can determine the position, type and capacity of the reactive power compensation equipment
Under the constraints of different load operation modes, it can maximize the difference between the cost of energy loss reduction and the investment cost of reactive power compensation equipment
According to the principle of decomposition coordination, the literature [2,3,4,5] decomposes the reactive power compensation into the maximum, minimum and general load modes, and unifies it to the maximum load mode, which is solved by the gradient method of nonlinear programming, it is easy to fall into the local optimal solution for non-convex problems, and no method for determining the compensation position is given
Summary
The reactive power compensation of the distribution network can determine the position, type and capacity of the reactive power compensation equipment. Under the constraints of different load operation modes, it can maximize the difference between the cost of energy loss reduction and the investment cost of reactive power compensation equipment. The compensation node, the other process is the same as the literature [16], the network loss change and the node voltage are comprehensively considered when determining the compensation position. The advantage of the literature [16,17,18] is that the calculation amount is small, there is no convergence problem, but the compensation position is determined without considering the change of the post-compensation cost, it is difficult to obtain the maximum cost savings, and the. Repeat the above process until the new compensation position is no longer cost-saving, and there is no need to manually intervene to compensate for the number of positions selected
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