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Novel subsynchronous oscillation damping controller

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

Active Publication Date: 2010-01-20
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

[0031] figure 1 A schematic diagram of a new type of subsynchronous oscillation damping controller using capacitors and inverters connected in series to suppress SSO / SSR is given, where C is the series 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.

[0032] When using the new subsynchronous oscillation damping controller to suppress SSO / SSR, in addition to using figure 1 The shown subsynchronous oscillation damping controller can be connected to the power system in parallel with the ...

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Abstract

The invention provides a novel 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 new type of damping controller for suppressing subsynchronous oscillations of power systems, which belongs to the field of safety and stability control of power system grids, and specifically relates to inverters, inverter series capacitors, inverter parallel capacitors, etc. that adopt appropriate control strategies structure 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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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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