Stored-energy capacity configuration method used for stabilizing city load growth

Abstract

The invention provides a stored-energy capacity configuration method used for stabilizing city load growth. The stored-energy capacity is an electric-energy quantity stored by an energy-storage system installed in a power grid. The method includes the following steps: obtaining typical daily load data of an installation point of the energy-storage system; calculating an output power of the energy-storage system; calculating a energy-storage-cell configuration capacity and an energy-storage rated power; constructing an energy-storage capacity configuration optimization target function; and carrying out an iterative operation until an optimal solution is obtained. The method realizes functions of peak load shifting and load peak and valley difference reduction in a city power distribution network. The method reasonably selects an energy-storage capacity according to a typical daily load curve of an energy-storage access point so that the adaptability is great; electric energy consumption and energy storage investment cost are considered comprehensively and while the voltage distribution of the power distribution network is adjusted, the voltage deviation of the power distribution network is reduced and the loss of the power distribution network is reduced, the investment cost is reduced as much as possible so that waste of energy storage device capacity is prevented; and the method is capable of calculation through use of an iterative method, simple and easy to realize and high in convergence rate.

Description

technical field [0001] The invention belongs to the field of urban distribution networks, and in particular relates to an energy storage capacity allocation method for stabilizing urban load growth. Background technique [0002] With the economic growth of developed economies and the rapid rise of emerging economies, urban power loads are increasing rapidly, and the load composition is becoming increasingly complex, especially with the widespread use of air conditioners, refrigerators, color TVs and other household The proportion of the load in the load is getting larger and larger, which makes the impact of the change of the residential electricity load on the change of the peak load of the system more and more large. The fast-growing load increases the peak-to-valley difference in power consumption, increases the maximum demand for power, and reduces the load rate of power consumption. At present, my country's power structure is still dominated by thermal power, and most ...

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Problems solved by technology

[0005] At present, research on energy storage systems at home and abroad is mostly focused on the control of energy storage output power. Most of the optimal configuration methods of energy storage capacity are based on empirical analysis, and the adaptability is not strong, and most of the research work is in the field of intermittent new energy power generation. and the microgrid field as the application background, the application research in the distribution network is still relatively lacking

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