Title: Equivalent Inertia Provided by Droop Control of Fast Frequency Regulation Resources Show Chinese title

Title: 惯性响应资源的下垂控制提供的等效惯量

Abstract: Conventional inertia control strategies (i.e., the VSG-based and PD-based strategies) for the fast frequency regulation resources (FFRs) might lead to system oscillations due to their emulations of generator dynamics. The only-droop-based inertia control strategy is a feasible idea to address this issue. This letter quantitatively investigates the equivalent inertia provided by the droop control of the FFRs. First, an equivalent-scenario-based method is proposed to evaluate the equivalent inertia provided by the droop control, which shows that the droop control with a constant droop coefficient provides time-variant equivalent inertia. Then, the time-variant-droop-based equivalent inertia control (VDIC) strategy is proposed for the FFRs, which can provide the required constant inertia support without introducing generator-like dynamics. A case study verifies the effectiveness of the VDIC strategy. Show Chinese abstract

Abstract: 针对快速频率调节资源（FFRs）的传统惯性控制策略（即基于VSG和基于PD的策略）可能会由于对发电机动态特性的模拟而导致系统振荡的问题，基于单一下垂系数的惯性控制策略是一种可行的解决方案。 本文量化研究了FFRs下垂控制所提供的等效惯量。首先，提出了一种基于等效场景的方法来评估下垂控制提供的等效惯量，结果显示具有恒定下垂系数的下垂控制提供了时变的等效惯量。然后，提出了基于时变下垂的等效惯量控制（VDIC）策略，该策略能够在不引入类似发电机动态特性的情况下提供所需的恒定惯量支持。案例研究验证了VDIC策略的有效性。