【目的】针对在弱电力系统中直接投建构网型储能面临投资成本高和投资回收周期长等问题，考虑多元市场的价值激励，在已有跟网型电化学储能的基础上，提出了一种计及电能量-调频-惯量联合市场下的电化学储能构网型改造策略优化方法。【方法】在包含电化学储能的电能量-调频-惯量联合市场交易框架基础上，从电化学储能运营商的视角出发，计及电化学储能构网型改造成本，建立了电化学储能参与电能量-调频-惯量联合市场的交易决策双层模型。其中，上层模型以储能收益最大为目标进行市场交易决策以及优化构网型改造策略，下层模型模拟电能量、调频和惯量市场的联合出清过程。针对计及火电机组启停状态导致下层市场出清非凸的问题，通过松弛处理，并基于对偶理论进行原始-对偶重构，将其转化为单层混合整数规划问题求解。【结果】算例分析表明，在计及多元市场价值激励下，构网型改造后电化学储能运营商的净收益增加了94 772.32元，增幅高达73.5%，同时系统运行成本下降约0.2%；当系统风电装机规模增加50%时，电化学储能运营商的最优构网型改造比例由29%增加至64%，净收益增加量提高至 204 746.46元，系统总运行成本减少量增加至385 667.39元。【结论】该方法可有效激励跟网型电化学储能进行构网型改造，并通过减少高边际成本火电机组开机，提升系统整体社会福利水平，同时，随着系统新能源占比的提高，电化学储能构网型改造需求将进一步增大。

[Objective] In response to the high investment cost and long investment payback period when grid-forming energy storage is directly constructed in weak power systems， and in consideration of the value incentives of multiple markets， a decision-making method for the grid-forming transformation of electrochemical energy storage based on the existing grid-following electrochemical energy storage is proposed in the context of the electric energy-frequency regulation-inertia joint market. [Methods] Based on the trading framework of the electric energy-frequency regulation-inertia joint market which includes electrochemical energy storage， and from the perspective of electrochemical energy storage operators， a bilevel model for electrochemical energy storage integration in the joint market is established， taking into account the cost of grid-forming transformation of electrochemical energy storage. The upper-level model aims to maximize the revenue of energy storage for market trading and grid-forming transformation decisions. The lower-level model simulates the joint clearing process of the electric energy， frequency regulation， and inertia markets. To address the non-convexity of the lower-level market clearing caused by the start-up and shutdown states of thermal power units， the problem is relaxed and reconstructed using duality theory to transform it into a single-level mixed-integer programming problem for solution. [Results] The case study analysis indicates that， under the incentive of the value of multiple markets， the net revenue of electrochemical energy storage operators increased by 94 772.32 yuan after the grid-forming transformation， with an increase of as high as 73.5%， while the system operating cost decreased by about 0.2%. When the installed capacity of wind power in the system increased by 50%， the optimal proportion of grid-forming transformation of electrochemical energy storage operators increased from 29% to 64%， the increase in net revenue rose to 04，746.46 yuan， and the reduction in the total system operating cost increased to 85，667.39 yuan. [Conclusions] The method effectively incentivizes grid-following electrochemical energy storage systems to undergo grid-forming transformation， displacing high-marginal-cost thermal power units and thereby raising aggregate social welfare. As the share of renewable generation increases， the economic case for such transformation is further strengthened.