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Energy storage control method and new energy support machine for increasing the adjustment capacity of new energy stations

A technology of adjustment capability and support machine, applied in the direction of AC network load balancing, reducing/preventing power oscillation, AC network circuit, etc. Rapid fluctuation and the effect of improving frequency stability

Active Publication Date: 2021-04-13
CHINA ELECTRIC POWER RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides an energy storage control method and a new energy support machine that increase the adjustment ability of new energy stations, aiming to solve the problems of insufficient inertia support and weak adjustment ability of new energy stations

Method used

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  • Energy storage control method and new energy support machine for increasing the adjustment capacity of new energy stations
  • Energy storage control method and new energy support machine for increasing the adjustment capacity of new energy stations
  • Energy storage control method and new energy support machine for increasing the adjustment capacity of new energy stations

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Embodiment approach

[0135] A. It cannot be charged and can only be discharged. SOC is greater than or equal to or not less than SOC max .

[0136] A1 mode: At this time, the frequency modulation control method is to absorb active power from the grid (that is, correspondingly, the DC energy storage unit needs to enter the charging state), then the current reference value of the bidirectional DC / DC converter must be set to zero. Limiting. At this time, the bidirectional DC / DC converter does not receive active power;

[0137] A2 mode: At this time, the frequency modulation control method is to import active power to the grid (that is, correspondingly, the DC energy storage unit enters the discharge state), and at this time the current reference value I of the bidirectional DC / DC converter bref The sign of is positive; in order to ensure that the bidirectional DC / DC converter or the DC energy storage unit is not discharged, the upper limit of the current reference value of the bidirectional DC / DC ...

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Abstract

The invention discloses an energy storage control method and a new energy support machine for increasing the regulation capability of a new energy station. The method determines the frequency modulation control mode according to the acquired active power reference value issued by the frequency modulation control device; According to the acquired active power converted by the DC / DC converter and the active power reference value, an active power control deviation is generated; according to a preset control strategy and the active power control deviation, an active power control current value is generated; According to the obtained conversion current limit value of the DC / DC converter, the frequency modulation control mode and the energy storage working mode, the active power control current value is limited to obtain the current reference value of the DC / DC converter. When the frequency of the grid fluctuates, the control method can provide inertia support and adjustment capability to the grid quickly, stably and accurately.

Description

technical field [0001] The invention relates to the technical field of power system operation and control, in particular to an energy storage control method and a new energy support machine for increasing the adjustment capability of a new energy station. Background technique [0002] On August 9, 2019, there was a major power outage in the UK. The process is roughly as follows: For some reason, the Little Barford gas-fired power station in the North Sea grid was shut down. After the gas-fired power station is disconnected from the grid, the power generation load lost by the grid reduces the frequency of the power system. On the other hand, due to the insufficient ability of the wind turbines in the North Sea Power Grid to withstand low frequencies, the reduction in the frequency of the power system caused a large number of wind turbines to go off-grid, so the output of the wind farm dropped sharply, which further increased the power generation load lost by the power grid, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24H02J3/28H02J3/38
CPCH02J3/28H02J3/381H02J3/241
Inventor 孙华东李文锋郭剑波张健郭强李志强赵兵魏巍
Owner CHINA ELECTRIC POWER RES INST
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