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Energy storage economic operation control method and device for microgrid

A technology of economic operation and control method, applied in the field of microgrid, can solve problems such as low flexibility, difficulty in parameter selection, and inability to guarantee convergence to the global optimal solution

Active Publication Date: 2017-12-15
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology

The above method 1) does not consider the correlation of each time period, does not carry out overall planning and scheduling, has low flexibility and usually cannot achieve the optimal goal, and the above method 2) cannot guarantee convergence to the global optimal solution when there are multiple local optimal solutions solution, parameter selection is difficult

Method used

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  • Energy storage economic operation control method and device for microgrid
  • Energy storage economic operation control method and device for microgrid
  • Energy storage economic operation control method and device for microgrid

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Embodiment

[0137] suppose figure 1 The middle stage 0-stage N corresponds to 24 hours a day, that is, the scheduling cycle is 24 hours, and the process of the energy storage unit from the fullest power to 0 power (here the power is used as a parameter to distinguish different states) includes 0 ~n states, figure 1 The middle black circle represents that the energy storage unit is in a valid state, and the white circle represents that the energy storage unit is in an invalid state. The scheme of the embodiment of the present invention is described in detail below:

[0138] Such as figure 1 As shown, taking the interval as 1 hour, the stages are 0, 1, 2, ..., 24, figure 1 The m in the energy storage unit represents the initial and final state of the energy storage unit. Assume that the electric quantity state of stage 0 and stage 24 is 20KWh, that is, m takes 20KWh, the maximum capacity of the energy storage unit is 50KWh, the maximum charge and discharge power is 10KW, and the charge an...

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Abstract

The invention proposes an energy storage economic operation control method and device for a microgrid, and the method comprises the steps: firstly determining an effective state of the electric quantity of an energy storage unit, calculating the charging and discharging power of the energy storage unit, determining a stage index function, determining the optimal operation cost of the energy storage unit, and determining the optimal scheduling strategy of the charging and discharging power of the energy storage unit, thereby achieving the intelligent scheduling of the energy storage unit in the microgrid and guaranteeing the economic and stable operation of the energy storage unit. According to the technical scheme of the invention, the method achieves the search towards the center from two directions (sequential and inverted sequences) based on a bidirectional dynamical planning algorithm, and greatly reduces the calculation burden of the dynamical planning algorithm. Moreover, when the requirements for the calculation time are not high, the bidirectional dynamical planning algorithm can give an economic scheduling strategy, which accords with an optimization target in a better way, of the energy storage unit.

Description

technical field [0001] The invention relates to the technical field of microgrids, in particular to a method and device for controlling economical operation of energy storage in microgrids. Background technique [0002] With the rapid economic development and increasing energy consumption, the development of renewable energy and the construction of sustainable energy systems have become an inevitable trend in the power industry. Due to the advantages of high energy utilization and environmental friendliness, micro-grids are subject to Widespread concern. As a new power network system, microgrid is composed of distributed power supply, energy storage unit and power load. Energy storage unit is an important part of microgrid, and the intelligent dispatch of energy storage unit is related to the vigorous development of microgrid. [0003] The role of the energy storage unit in the microgrid is mainly reflected in: (1) peak shaving and valley filling; (2) improving power quali...

Claims

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Application Information

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IPC IPC(8): H02J3/32
CPCH02J3/32Y02E70/30
Inventor 王德顺沈鸿叶季蕾薛金花冯鑫振杨波吴福保伏祥运岳付昌赵上林孙博陶琼姬联涛俞斌韩桂刚朱红保
Owner CHINA ELECTRIC POWER RES INST
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