| 引用本文: | 于继来,张 婷,郭钰锋,等.交直流电力网络源流电能分配关系解析[J].电力系统保护与控制,2021,49(9):37-47.[点击复制] |
| YU Jilai,ZHANG Ting,GUO Yufeng,et al.Analysis of energy distribution relationship of a source-flow pair in an AC/DC power network[J].Power System Protection and Control,2021,49(9):37-47[点击复制] |
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| 摘要: |
| 瞬时值解析方式虽更易于厘清电气源流间的瞬时分配关系，但若将其直接应用于分析大型交直流电网源流电能分配关系(EDR)，则仍存在计算量大、与常用关口式电能计量模式不兼容的问题。为此，提出了一种解析EDR的方法。推导了关于交流支路源-流对的瞬时电流和功率及周期电能分配关系式，提出了计算直达能量成分及其能耗的方法，并采用等效虚拟交流化的方式将其拓展应用于直流支路源-流对。在此基础上，提出了能够计算任一网络源-流对所有关联路径链的EDR正反向追踪算法。算例表明，该方法能够计算全网级的EDR，可为研发智能电网能流和非能流综合分析与核算系统提供技术支撑。 |
| 关键词: 交直流电力网络 源流 能量追踪 瞬时值 分摊 |
| DOI：DOI: 10.19783/j.cnki.pspc.200913 |
| 投稿时间：2020-07-30修订日期：2020-11-18 |
| 基金项目:国家电网公司科技项目资助(SGTYHT/18-JS-206) |
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| Analysis of energy distribution relationship of a source-flow pair in an AC/DC power network |
| YU Jilai1,ZHANG Ting1,GUO Yufeng1,SHENG Yuhe2,SHENG Yuhe1,ZHANG Wei1 |
| (1. School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China;
2. Electric Power Research Institute of State Grid Heilongjiang Electric Power Company Limited, Harbin 150030, China) |
| Abstract: |
| Although the instantaneous value analysis method makes it easier to clarify the instantaneous current and power distribution relationships between electrical sources and flows, if it is directly applied to analyze the source-flow Energy Distribution Relationship (EDR) of a large AC/DC power grid, there remain problems such as a large amount of calculation and incompatibility with common gateway energy metering modes. Therefore, a new method of analyzing EDR is proposed. For AC branch source-flow pairs, the distribution relationships of instantaneous current, instantaneous power and periodic energy are derived, and a method for calculating through-energy components and energy loss is proposed. This method is extended to DC branch source-flow pairs with virtual AC technology. Forward and backward tracking algorithms of EDR for all associated path chains of any network source-flow pair are proposed. The cases show that the method can calculate the grid-level EDRs, and provide theoretical support to further develop an integrated analysis system of energy-flow and non-energy flow for a smart grid.
This work is supported by the Science and Technology Project of State Grid Corporation of China (No. SGTYHT/18-JS-206). |
| Key words: AC/DC power network source and flow energy track instantaneous value allocation |
