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Quick and stable control method adopted after island independent grid power generation equipment failure

A stable control method and technology of power generation equipment, applied in the direction of power network operating system integration, AC network voltage adjustment, AC network load balancing, etc., to achieve the effect of improving stability

Inactive Publication Date: 2014-07-02
XJ ELECTRIC +1
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a fast and stable control method after the failure of the island independent power grid power generation equipment to solve the problem of dynamic stability of the island independent power grid after the failure of the power generation equipment

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  • Quick and stable control method adopted after island independent grid power generation equipment failure
  • Quick and stable control method adopted after island independent grid power generation equipment failure
  • Quick and stable control method adopted after island independent grid power generation equipment failure

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Embodiment Construction

[0032] The present invention will be further introduced below in conjunction with the accompanying drawings and specific embodiments.

[0033] Such as figure 1 Shown is the system structure diagram of transient stability control after failure of the present invention, as shown in the figure, the system is divided into local control layer and centralized control layer, in which the collection terminal, energy storage PCS, photovoltaic inverter, wind turbine inverter The device is a synchrophasor measurement unit PMU, responsible for collecting wide-area measurement data, and transmitting data to the master station (centralized protection device for island power grid, fault stability controller for island power grid) at a frequency of 200 frames per second through a fast communication network. The intelligent collection terminal adopted in the present invention can directly send wide-area measurement data, collect circuit breaker position and send local fault information; it als...

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Abstract

The invention discloses a quick and stable control method adopted after island independent grid power generation equipment failure. According to the difference in operation features of power generation equipment, the power generation equipment is divided into three types, and the dynamic stable control mode after failure switching is preset according to the type of the failure power generation equipment; the corresponding dynamic stable control mode after failure switching is executed according to the received type of the failure power generation equipment; after the failure is eliminated, the execution of the corresponding dynamic stable control mode is canceled according to a received failure elimination signal. According to the method, based on wide-area data uploaded by a wide-area measurement unit, power vacancy caused by the exiting of the power generation equipment is calculated when the power generation equipment failure occurs, power imbalance of a system is eliminated instantly through storage energy regulation or load control after failure switching so that the system can be recovered to the stable operation state before the failure occurs, power balance is realized quickly after the island grid failure, and the stability of the fragile island grid system is improved.

Description

technical field [0001] The invention relates to a fast and stable control method after failure of island independent power grid power generation equipment. Background technique [0002] The island power supply system far away from the mainland is an independent network integrating power generation, distribution and consumption. Without the support of a large power grid, the system is relatively fragile. In addition to conventional rotating generators, island power grids also have distributed power sources with various forms and performances and a large number of scattered power electronic inverter power generation equipment. Diesel generators, small hydraulic generators, micro gas turbine generators, wind generators, photovoltaic power generation equipment, and energy storage used in island power grids can be divided into three categories according to their control characteristics. One type is conventional rotating power generation equipment such as diesel generators, small...

Claims

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Application Information

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IPC IPC(8): H02J3/28H02J3/14
CPCY04S20/222Y02B70/3225
Inventor 张新昌张项安毛建容马红伟周逢权李瑞生
Owner XJ ELECTRIC
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