| Dispatch Liquidity Theory in a Deregulated Environment |
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| 作者姓名： | 沈瑜 夏清 康重庆 |
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| 作者单位： | DepartmentofElectricalEngineering,TsinghuaUniversity,Beijing100084,China |
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| 基金项目： | Supported by the National Key Basic Research and Development (973) Program of China (No. G1998020311) |
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| 摘 要： | Power system security and reliability are more complex issues in a deregulated environment.Various criteria have been considered for power system reliability. In the day-ahead market, a successful trade schedule should be able to accept various disturbances with sufficient flexibility to be adjusted during the re-dispatch process. This paper describes the dispatch liquidity theory and some liquidity indices. The liquidity indices evaluate the effective operating reserves with the network constraints taken into consideration. A model is presented to calculate the liquidity index. An extended trade scheduling model with minimum liquidity index constraints is presented that considers the distribution requirements of the operating reserves. The liquidity indices could also be used to coordinate the security and reliability between multistage markets and for contingency selection. The algorithms were tested with real power system data. The results show that the dispatch liquidity theory is reasonable and the algorithms are effective.
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| 关 键 词： | 流性指数 多级市场 贸易计划 安全 可靠性 计算方法 预期市场 能量系统 |
Dispatch Liquidity Theory in a Deregulated Environment |
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| SHEN Yu XIA Qing KANG Chongqing.Dispatch Liquidity Theory in a Deregulated Environment[J].Tsinghua Science and Technology,2005,10(2):240-246. |
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| Authors: | SHEN Yu XIA Qing KANG Chongqing |
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| Institution: | SHEN Yu XIA Qing KANG Chongqing Department of Electrical Engineering,Tsinghua University,Beijing 100084,China |
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| Abstract: | Power system security and reliability are more complex issues in a deregulated environment. Various criteria have been considered for power system reliability. In the day-ahead market, a successful trade schedule should be able to accept various disturbances with sufficient flexibility to be adjusted during the re-dispatch process. This paper describes the dispatch liquidity theory and some liquidity indices. The li- quidity indices evaluate the effective operating reserves with the network constraints taken into considera- tion. A model is presented to calculate the liquidity index. An extended trade scheduling model with mini- mum liquidity index constraints is presented that considers the distribution requirements of the operating re- serves. The liquidity indices could also be used to coordinate the security and reliability between multistage markets and for contingency selection. The algorithms were tested with real power system data. The results show that the dispatch liquidity theory is reasonable and the algorithms are effective. |
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| Keywords: | electricity market power system trade scheduling dispatch liquidity |
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