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Novel subsynchronous oscillation damping controller

A technology of subsynchronous oscillation and damping controller, applied in the direction of reducing/preventing power oscillation, AC network to reduce harmonics/ripple, reactive power compensation, etc., to improve the suppression effect and increase the electrical damping effect

Active Publication Date: 2011-08-17
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] There is no same or similar subsynchronous oscillation damping controller proposed by the present invention at home and abroad

Method used

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  • Novel subsynchronous oscillation damping controller
  • Novel subsynchronous oscillation damping controller
  • Novel subsynchronous oscillation damping controller

Examples

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Embodiment Construction

[0030] figure 1 A schematic diagram of the subsynchronous oscillation damping controller using capacitors connected in series with inverters to suppress SSR by connecting in parallel with series compensation capacitors to the power system is given, where C is the series compensation capacitor, and C 1 is the bypass capacitor; the branch current of the series compensation capacitor is i C , the bypass capacitor branch current is i 1 . The present invention makes the entire bypass capacitor branch with inverter present a predetermined impedance characteristic through a preset inverter control strategy to absorb, damp or bypass sub-synchronous frequency components, thereby increasing the electrical damping of the corresponding sub-synchronous frequency , and finally achieve the purpose of suppressing power system SSO / SSR.

[0031] When using the subsynchronous oscillation damping controller to suppress SSO / SSR, in addition to using figure 1 The shown subsynchronous oscillatio...

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Abstract

The invention provides a subsynchronous oscillation damping controller which adopts the structure that a capacitor is connected with an inverter in series or in parallel, or the controller is only formed by the inverter; according to the preset control policy of the inverter, the subsynchronous oscillation damping controller takes on the characteristics of the preset impedance to absorb, damp or bypass subsynchronous frequency component, thus increasing the electrical damping of the corresponding subsynchronous frequency and finally achieving the aim of inhibiting subsynchronous oscillation (SSO) or subsynchronous resonance (SSR) of an electric power system.

Description

technical field [0001] The invention proposes a damping controller for suppressing the subsynchronous oscillation of the power system, which belongs to the field of power system safety and stability control, and specifically relates to structures such as inverters, inverter series capacitors, and inverter parallel capacitors that adopt appropriate control strategies A method to suppress power system subsynchronous oscillation / resonance (SSO / SSR). Background technique [0002] Due to the geographical mismatch between primary energy and power loads, large-scale, cross-regional interconnected power grids have become one of the most important features of modern power systems, and long-distance, large-capacity, and cross-regional power transmission has become inevitable. While the interconnection of large power grids brings huge economic benefits, it also makes the dynamic behavior of the power system more complex and difficult to grasp. Weak and cannot be effectively suppressed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18H02J3/24H02J3/01
CPCY02E40/30Y02E40/40
Inventor 武守远吉平戴朝波王宇红
Owner CHINA ELECTRIC POWER RES INST
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