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A control device and method for improving frequency stability of a dual-region interconnected power system

A frequency stability, power system technology, applied in circuit devices, AC networks with the same frequency from different sources, wind power generation, etc., to ensure reliable operation, frequency stability, and reduce losses.

Inactive Publication Date: 2020-05-15
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional control mode can no longer meet the needs of safety and economy brought about by the development of the power grid, refined automatic dispatching, market rules and management modes, and there is an urgent need to improve the technical means.

Method used

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  • A control device and method for improving frequency stability of a dual-region interconnected power system
  • A control device and method for improving frequency stability of a dual-region interconnected power system
  • A control device and method for improving frequency stability of a dual-region interconnected power system

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Embodiment Construction

[0032] Attached below figure 1 to attach Figure 5 A control device and control method for improving the frequency stability of a dual-area interconnected power system based on an energy storage system of the present invention will be further described in detail.

[0033] figure 1 It is a schematic structural diagram of a control device for improving the frequency stability of a dual-area interconnected power system based on an energy storage system in this embodiment, as shown in figure 1 As shown, the device system is divided into two parts, the first area and the second area. The first area device includes the battery energy storage unit 1, the first normally open relay KM11, the first normally closed relay KM12, and the second normally open relay KM13. And the second normally closed relay KM14, the step-down chopper composed of the switch tube IGBT11, the inductor Lf11 and the diode D11, the step-up chopper composed of the switch tube IGBT12, the inductor Lf12 and the di...

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Abstract

The invention discloses a control device for improving the frequency stability of a double-area interconnected power system. A battery energy storage unit, a normally open relay, a normally closed relay, a buck chopping circuit, a boost chopping circuit, a terminal capacitor, a converter and a power smoothing device are connected with one another so as to form the control device; the device is arranged in two power system areas; and the power output ends of the two areas are connected with each other. The invention also discloses a control method of the control device for improving the frequency stability of the double-area interconnected power system. An intelligent PI controller is adopted to maintain the dynamic balance of the output power of the interconnected double-area power system; and therefore, fluctuant and intermittent wind power resources can be fully utilized, the dynamic balance of the interconnected double-area power system can be maintained, the frequency of the double-area interconnected power system can be stable, and the reliable operation of the interconnected power system can be ensured.

Description

technical field [0001] The invention belongs to the technical field of power system operation control, and in particular relates to a control device and method for improving the frequency stability of a dual-area interconnected power system. Background technique [0002] With the increase of the interconnection degree of the power network, the stability of the power system becomes the key to the safety of the large power grid. Once the stability of the power system is damaged, it will cause huge economic losses and catastrophic consequences. With the gradual expansion of the scale of regional systems, sudden regional disturbances have extremely adverse consequences on the frequency stability of the power grid. At the same time, frequency fluctuations will seriously affect the power flow of tie lines and cause problems such as overload of tie lines between interconnected areas. These problems have become the direct or indirect causes of major power outages at home and abroad....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24H02J3/32H02J3/38H02J3/06
CPCH02J3/06H02J3/24H02J3/32H02J3/386Y02E10/76
Inventor 杨斌赵龙王艳许乃媛郑志杰刘晓明魏鑫王轶群张丽娜田鑫魏佳安鹏薄其滨李沐杜鑫
Owner STATE GRID CORP OF CHINA
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