Optimal Configuration Method for Dynamic Reactive Power Compensation in AC/DC Receiving-end Systems Considering Reactive Power Support of Local Synchronous Generators

In regions characterized by relatively rapid economic development, where available sites for configuring dynamic reactive power compensation devices are limited, and substantial investment costs are involved, a solution is needed. To address this challenge, this paper proposes a bi-level optimization model that accounts for the contribution of synchronous generators to dynamic reactive power compensation in AC/DC receiving-end systems. In this model, the local synchronous generators are used as a kind of dynamic reactive power source, which can offer their transient reactive power support during system faults to minimize the additional demand for dynamic reactive power compensation devices. And the Dynamic and Static Comprehensive Load Rate is proposed to identify vulnerable voltage nodes as installation candidates. On this basis, the objective function of the upper-layer optimization model is maximum the comprehensive assessment index on behalf of transient reactive power support by generators, which optimizes the initial operational state of generators to enhance their reactive power support capability for vulnerable voltage nodes. In the lower-layer optimization model, the improved Voltage-reactive Trajectory Sensitivity Index is utilized as the objective function to determine the optimal installation nodes and compensation capacity. Finally, an improved 22-node system with dual feeders is taken as a case study, which validated the effectiveness and economic viability of the proposed approach.