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Optimization method and system for participation of energy storage power station group in power system AGC

An energy storage power station and power system technology, applied in the field of automatic power generation control of power systems, can solve problems such as failure to meet system frequency control requirements, and achieve the effects of improving overall utilization efficiency, reasonable scheduling, and precise scheduling

Active Publication Date: 2021-05-25
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +1
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Problems solved by technology

Only relying on conventional units to participate in Automatic Generation Control (AGC) to provide frequency regulation auxiliary services for the grid can no longer meet the frequency control requirements of the system

Method used

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  • Optimization method and system for participation of energy storage power station group in power system AGC
  • Optimization method and system for participation of energy storage power station group in power system AGC
  • Optimization method and system for participation of energy storage power station group in power system AGC

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Embodiment Construction

[0080] The application will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, but not to limit the protection scope of the present application.

[0081] Such as figure 1 and 7 As shown, an optimization method for an energy storage power station group participating in the AGC of the power system of the present invention includes the following steps:

[0082] Step 1. The main controller of the distributed energy storage power station group receives the AGC command from the dispatch center and obtains the output P of the energy storage power station group E (t), for each energy storage power station ESS i Assign output power reference value P i,ref (t);

[0083] Among them, M represents the number of energy storage power stations included in the distributed energy storage power station group, and ESS i Indicates the i-th energy storage po...

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Abstract

The invention discloses an optimization method and system for participation of an energy storage power station group in a power system AGC. The method comprises: receiving an AGC instruction of a dispatching center, obtaining the output of the energy storage power station group, and distributing an output power reference value for each energy storage power station; taking the output power offset and the charge state offset as penalty cost, and establishing an energy storage power station group real-time frequency modulation capability evaluation model with the minimum cost of the energy storage power station group as an objective function; optimizing the output power offset weight coefficient and the charge state offset weight coefficient of each energy storage power station; optimizing and solving an energy storage power station group cost minimum objective function; and performing optimization control on secondary frequency modulation participated by the energy storage power station group. On the basis that the whole power station group meets the secondary frequency modulation requirement of the power grid, the energy storage substations with the low cost function are called preferentially, reasonable and accurate scheduling of all the energy storage power stations in the energy storage power station group is achieved, and balanced optimization of all the energy storage power station groups is achieved.

Description

technical field [0001] The invention belongs to the technical field of electric power system automatic power generation control, and relates to an optimization method and system for an energy storage power station group to participate in the AGC of the electric power system. Background technique [0002] With the gradual formation of the UHV AC-DC hybrid power grid and the significant increase in the penetration rate of new energy, the stability of the power system is facing severe challenges. On the one hand, the high proportion of incoming electricity from outside the UHV area has squeezed the power generation share of some units in the local receiving power grid, resulting in insufficient frequency regulation reserve capacity. Determinism makes the power-frequency dynamic imbalance of the system aggravated. The situation of power system frequency security and stability is becoming more and more severe. Only relying on conventional units to participate in Automatic Gener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/28H02J3/46H02J3/24G06F30/27G06F111/04G06F111/06G06N3/12
CPCH02J3/28H02J3/46H02J3/24G06F30/27H02J2203/10H02J2203/20G06F2111/04G06F2111/06G06N3/126Y04S10/50Y02E40/70
Inventor 饶宇飞李朝辉谷青发滕卫军孙鑫杨海晶徐鹏煜张江南贺勇
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
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