Power system voltage stability control method and system thereof

A voltage stabilization and power system technology, applied in the field of power system voltage stabilization control methods and systems, can solve problems such as combined control instability, and achieve the effects of improving transient voltage stability, continuous regulation, and low cost

Active Publication Date: 2014-10-29
GUANGZHOU POWER SUPPLY CO LTD +1
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Problems solved by technology

[0004] Aiming at the unstable problem of the combination control of the existing static synchronous compensator and mechanical switching capacitor, the present invention provides a power system voltage stability contr

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  • Power system voltage stability control method and system thereof
  • Power system voltage stability control method and system thereof
  • Power system voltage stability control method and system thereof

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Embodiment Construction

[0053] The power system voltage stability control method of the present invention can be applied to such as figure 1 In the power system shown, in the power system, a static synchronous compensator (STATCOM) and a plurality of mechanical switched capacitors (MSC) are connected in parallel on the same bus, so as to speed up The response speed and dynamic range of power compensation can reasonably allocate the reactive power demand of the system to STATCOM and MSC in steady state.

[0054] see figure 2 , figure 2 It is a schematic flow chart of the power system voltage stability control method of the present invention.

[0055] The power system voltage stability control method includes:

[0056] A voltage stability control method for a power system, based on a static synchronous compensator and a mechanically switched capacitor, comprising steady-state control steps:

[0057] a) Acquire reactive parameters, including the reactive power demand reference value Q provided by ...

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Abstract

The invention provides a power system voltage stability control method and system. The number of actually should be invested MSC (Mechanical Switching Container) groups is decided based on an STATCOM (Static Synchronous Compensator) and the MSCs according to a reactive power requirement reference value and the rated reactive capacity of an SATCOM and the MSC and the output reactive capacity of the SATCOM is obtained according to a target parameter and the number of the MSC groups. If the reactive power required reference value provided by an automatic voltage control system is a voltage reference value, the reactive power required reference value can be converted into the reactive reference value through outer ring PI control and then capacity distribution composite control can be performed. When the reactive power requirement exceeds a composite output general reactive capacity range of the STATCOM and the MSCs, the reactive compensation capacity is invested farthest and the residual reactive power requirement is provided by a reactive-load compensation equipment of a nearby transformer substation. The power system voltage stability control method and system can improve the composite control stability and improve the STATCOM utilization efficiency.

Description

technical field [0001] The invention relates to the technical field of power system voltage stability control, in particular to a power system voltage stability control method and system thereof. Background technique [0002] In recent years, a number of voltage instabilities in the world have caused large-scale power outages, which have brought huge economic losses and adverse social impacts, and posed severe challenges to the safe and stable operation of power systems. At present, installing reactive power compensation equipment is one of the important methods to improve the voltage stability of power system. However, the traditional compensation is mainly based on mechanical switched capacitors (English abbreviation MSC), which has a slow response speed and is suitable for steady-state control; with the development of power electronics technology and corresponding control technology, static capacitors with fast response and adjustment speed Synchronous compensator (abbre...

Claims

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Application Information

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IPC IPC(8): H02J3/18H02J3/12
CPCY02E40/10
Inventor 刘育权谢小荣叶萌侯建兰王珂袁志昌王斐孙英云蔡莹
Owner GUANGZHOU POWER SUPPLY CO LTD
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