| 引用本文: | 叶 婧,杨 莉,张 磊,周广浩,蔡俊文.计及暂态频率稳定约束的同步惯量经济价值评估[J].电力系统保护与控制,2023,51(8):50-62.[点击复制] |
| YE Jing,YANG Li,ZHANG Lei,ZHOU Guanghao,CAI Junwen.Economic value evaluation of synchronous inertia considering frequency transient stability constraints[J].Power System Protection and Control,2023,51(8):50-62[点击复制] |
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| 摘要: |
| 高渗透率新能源接入系统后，保障系统具有充足的在线惯量是维持系统频率安全稳定的关键，同时建立惯性辅助服务市场是解决该问题的有效手段。因此，将同步惯性响应纳入有偿服务，搭建考虑系统最低同步惯量需求约束的定价出清模型，并提出离散变量松弛化的方法，将出清模型转化为凸优化问题。然后，基于边际成本定价法和拉格朗日对偶原理，以最低同步惯量需求约束对应的影子价格来评估其经济价值，为惯性服务定价。最后，以改进的IEEE 39节点系统和IEEE 118节点系统为例，对同步惯量影子价格的存在机理、数值影响因素以及同步机组收益进行分析讨论。结果表明，含高比例新能源系统具有建设惯性辅助服务市场的必要性和迫切性。所提方法和仿真结论为惯性服务市场化提供了参考性意见。 |
| 关键词: 惯性辅助服务市场 最低同步惯量需求 频率稳定 边际成本定价 影子价格 |
| DOI：10.19783/j.cnki.pspc.220900 |
| 投稿时间：2022-06-15修订日期：2022-10-13 |
| 基金项目:国家自然科学基金项目资助(52007103)；宜昌市自然科学研究项目资助(A22-3-001) |
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| Economic value evaluation of synchronous inertia considering frequency transient stability constraints |
| YE Jing1，2,YANG Li1，2,ZHANG Lei1，2,ZHOU Guanghao1，2,CAI Junwen1，2 |
| (1. College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443002, China;
2. Hubei Provincial Key Laboratory for Operation and Control of Cascaded Hydropower Station
(China Three Gorges University), Yichang 443002, China) |
| Abstract: |
| Ensuring sufficient online inertia is key to maintaining the security of system frequency when there is a high penetration of renewable energy in the system. The establishment of an inertia auxiliary service market is an effective means of achieving this. Therefore, with integrating synchronous inertia response into paid service, a pricing clearing model considering the minimum synchronous inertia is built, and a discrete variable relaxation method is proposed to transform the clearing model into a convex optimization problem. Then, based on the marginal cost pricing method and the Lagrange duality principle, a shadow price corresponding to the minimum synchronous inertia requirement constraint is extracted to evaluate its economic value and price the inertia service. Finally, taking the improved IEEE 39-bus and IEEE 118-bus systems as examples, the existence mechanism of the synchronous inertia shadow price, the numerical influencing factors and the benefits of the synchronous units are discussed in detail. The results show that it is necessary and urgent to build an inertia auxiliary service market in a power system which has a high proportion of new energy. Consequently the proposed method and simulation are able to provide guidance for the establishment of such an inertia auxiliary services market. |
| Key words: inertia auxiliary service market minimum synchronous inertia requirement frequency stability marginal cost pricing shadow price |
