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A method and apparatus for an energy storage system to participate in power grid frequency control

A grid frequency, energy storage system technology, applied in the direction of AC network load balancing, reducing/preventing power oscillation, etc.

Active Publication Date: 2016-03-30
NORTH CHINA ELECTRICAL POWER RES INST +2
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Problems solved by technology

[0003] The embodiment of the present invention provides a method for the energy storage system to participate in the frequency control of the power grid, which can well solve the problem of coordination and cooperation between the energy storage system and other units in primary frequency regulation and secondary frequency regulation

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Embodiment Construction

[0028] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments and the drawings. Here, the exemplary embodiments of the present invention and the description thereof are used to explain the present invention, but not as a limitation to the present invention.

[0029] In the embodiment of the present invention, a method for energy storage system to participate in grid frequency control is provided. The complete process of energy storage participating in grid frequency control includes three stages: the first stage is virtual inertial response, and the second stage is once. Droop control, the third stage is the second frequency modulation, which is commonly referred to as AGC control. The specific method flow is as follows figure 1 As shown, the method includes:

[0030] Step 1: The energy storage system monitors the grid frequency and th...

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Abstract

The invention provides a method and apparatus for an energy storage system to participate in power grid frequency control. The method comprises the steps of monitoring power grid frequency and charged states of an energy storage system in real time; if a power grid frequency offset exceeds a maximum frequency deviation, determining the energy storage system to participate into power grid primary frequency modulation according to deviation directions and the charged states; when a primary frequency modulation starting condition is satisfied, calculating virtual inertia response, a primary variable sagging control power adjustment value and a primary frequency modulation active control instruction; according to the primary frequency modulation active control instruction, carrying out primary adjusting of active power output of the energy storage system; starting secondary frequency modulation after time delay to determine a secondary frequency modulation instruction; according to the virtual inertia response, the primary variable sagging control power adjustment value and the secondary frequency modulation instruction, determining a secondary frequency modulation active control instruction; and according to the secondary frequency modulation active control instruction, carrying out secondary adjusting of the active output power of the energy storage system. Through adoption of the method and apparatus of the invention, coordination and cooperation between the energy storage system and other machine sets in aspects of primary frequency modulation and secondary frequency modulation can be well solved.

Description

Technical field [0001] The invention relates to the technical field of power grid frequency control, in particular to a method and device for an energy storage system to participate in power grid frequency control. Background technique [0002] With the growth of power demand, the peak-to-valley difference of grid load continues to increase, which puts forward higher requirements for power system frequency modulation, and requires more fast-responsive regulated power supplies. The frequency control in the traditional frequency modulation technology maintains the balance between the generated power and the load demand through the rapid increase or decrease of the output power. The generator has the shortcomings of slow response and low ramp rate, which leads to: 1) The scheduling goal cannot be achieved quickly due to the slow ramp, so that the rescheduling can be achieved quickly, so it cannot provide all the area control error correction; 2) Due to the slow climb, the direction...

Claims

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Application Information

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IPC IPC(8): H02J3/28H02J3/24
CPCH02J3/24H02J3/28
Inventor 吴林林刘辉白恺崔正湃李娜王皓靖李蕴红徐海翔江浩
Owner NORTH CHINA ELECTRICAL POWER RES INST
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