基于监督学习约束线性化的资源协同优化配置在高比例新能源场站中应用研究

doi:10.19595/j.cnki.1000-6753.tces.251700

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Abstract

With the continuous increase of high-penetration renewable energy, power system stability issues concerning small-signal and transient security have become increasingly prominent. Current studies critically lack a coordinated optimization framework that jointly enforces multiple stability constraints and integrates multiple types of devices. As a result, unmodeled stability metrics are often not validated for security compliance, posing potential operational risks, while device deployment remains largely confined to single-type configurations, hindering economic optimality. Moreover, existing transient analyses still model renewable generators as conventional impedance-voltage-source equivalents, which fail to accurately capture their true fault response characteristics and may lead to assessment results that deviate significantly from real behavior. Compounding these issues, the optimization models and solution algorithms employed often struggle to achieve an effective balance between computational efficiency and solution accuracy. To address these challenges, this paper proposes a coordinated resource allocation strategy based on supervised learning enabled constraint linearization.
Initially, the impact mechanism of modeling renewable energy as voltage-controlled current sources on stability indices is thoroughly analyzed. Subsequently, an optimization model for the coordinated configuration of synchronous condensers and energy storage is constructed. Furthermore, a supervised learning-based nonlinear constraint linearization method is introduced to reformulate the original problem as a MILP (Mixed-Integer Linear Programming) model, accompanied by theoretical analysis of the fitted model in terms of convergence of the linearization coefficients, model complexity, and approximation accuracy. Finally, mathematical simulations are conducted to validate the proposed optimization strategy.
Simulation results demonstrate that, throughout the entire time horizon, the system stability metrics satisfy all security constraints, with the average values of gSCR and SCC increased to 3.48 and 5.95, providing safety margins of 6.33% and 2.41% relative to their respective thresholds. Under this optimization strategy, the total system economic cost is significantly reduced, and the system's economic sensitivity to parameter variations is effectively mitigated. Moreover, the proposed model exhibits linear convergence and obtains the optimal solution within 32.67min. Compared with existing models, it achieves up to a 7-fold reduction in computational time and improves fitting accuracy by a factor of 5.6, with no violations of stability constraints observed across all test scenarios, demonstrating strong applicability and scalability in large-scale systems.
The following conclusions can be drawn from the analysis: 1) In terms of security and stability, the proposed strategy ensures that all system buses satisfy both small-signal and transient stability constraints throughout the entire scheduling horizon, with no violations observed. This effectively mitigates the safety risks associated with single-constraint optimization, where neglecting one stability dimension may compromise overall system security. 2) In terms of an economic perspective, the coordinated configuration significantly reduces the total system cost and eliminates resource allocation redundancy arising from decoupled planning. Furthermore, the resulting economic cost demonstrates strong robustness to variations in key parameters, such as renewable penetration levels and stability thresholds, rendering the approach well suited for electricity market operation scenarios which require comprehensive economic considerations. 3) Compared with existing methods, the proposed model demonstrates superior performance in convergence, solution accuracy, computational efficiency, and applicability; furthermore, the supervised learning-based constraint reconstruction step accounts for only 20% of the total computation time, imposing negligible overhead on solution efficiency.

Key words： High-penetration renewable energy small-signal stability transient stability supervised learning synchronous condenser coordinated optimal allocation

Received: 09 October 2025

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TM712

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	Xuan Ziyi
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Xuan Ziyi,Li Yonggang,Guo Xiaomei等. Research on Resource Coordinated Optimal Allocation in High-Penetration Renewable Energy Power Stations Based on Supervised Learning-Constrained Linearization[J]. Transactions of China Electrotechnical Society, 0, (): 20251700-.

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