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Active power flexible control method and device of new energy power station

A control method and technology of a control device, which are applied to the parallel feeding arrangement of a single network, etc., can solve the problems of insufficient adjustment and slow adjustment speed, and achieve the effect of increasing power generation and multi-economic benefits.

Inactive Publication Date: 2015-11-25
NR ELECTRIC CO LTD +1
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a flexible active power control method and device for a new energy power station, which can realize fast and reliable control of the active power of the power station, in view of the shortcomings of the existing new energy power station AGC system active power control function, such as slow adjustment speed and insufficient adjustment. Under the premise of ensuring the safety of power grid operation, use new energy to generate electricity as much as possible to create more economic benefits for power station owners

Method used

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  • Active power flexible control method and device of new energy power station
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  • Active power flexible control method and device of new energy power station

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Embodiment 1

[0041] see figure 1 , figure 2 , image 3 and Figure 4 , the active power flexible control method of the new energy power station includes the following steps:

[0042] (1) Sampling the voltage of the collector bus of the new energy power station and the current of each feeder, and calculating the active power generated by each feeder;

[0043] (2) Collect the voltage and current of the outgoing line of the new energy power station to calculate the total active power of the power station;

[0044] (3) Receive the planned active power value generated by the new energy power station from the dispatching master station through the telecontrol function module, and forward the planned active power value to the AGC system in the station;

[0045] (4) Collect the switch position signal as the condition of whether the feeder is allowed to cut, and participate in the blocking logic operation of cutting the feeder;

[0046] (5) Control the feeder power of the power station accord...

Embodiment 2

[0054] see figure 1 , figure 2 , image 3 and Figure 4 , the active power flexible control device of the new energy power station, including a sampling module, a calculation module, a telecontrol module, a feeder cutting control algorithm and an action outlet module;

[0055] The sampling module is used for the active power control device to sample the secondary current and secondary voltage of the outgoing line of the new energy power station, the collector bus and the feeder, and to collect the position signal of the feeder switch; the calculation module is used for according to the sampling module. As a result, the total active power value of the power station, the active power value of each feeder, and the position signal of the feeder switch are calculated; the remote control module is used to receive the planned active value issued by the master station and forward the planned active value to the AGC of the power station system.

[0056] The feeder cutting control ...

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Abstract

The invention discloses an active power flexible control method of a new energy power station. The active power flexible control method comprises the following steps of: sampling the voltage of a current collection bus of the new energy power station and the current of each feeding line by an active power flexible control device, and calculating active power of power generation of each feeding line; acquiring and calculating total active power of power generation of the new energy power station and acquiring a switch position of each feeding line; receiving a planning active power value of power generation of the power station from a dispatching master station and forwarding to an automatic gain control (AGC) system in the station; and adjusting the total active power of the power generation by the AGC system within a set delay time if the total active power of the power generation of the current power station exceeds a pre-set protective constant value, and selectively cutting a part of feeding lines and reducing the total active power of the power station to below the active value if the active power of the power generation is not adjusted to be below the planning active value by the AGC system. The invention also provides the active power flexible control device. The active power flexible control method is rapid and reliable, the output active power cut by the power station is reduced as much as possible, clean energy is utilized to the maximum, and electric energy production is increased.

Description

technical field [0001] The invention belongs to the field of automatic control of new energy power generation, and in particular relates to a flexible control method and device for active power of a new energy power station. Background technique [0002] In recent years, under the background of promoting the use of renewable energy and clean energy and promulgating many policies to support and encourage the development of new energy industries, a large number of photovoltaic power stations, wind farms and other new energy power stations have been put into operation and connected to the grid system. Since the power generation of photovoltaic power plants and wind farms is obviously affected by the weather, it has the characteristics of randomness, intermittence and volatility, which brings greater impact and challenges to the safe and stable operation of the power grid. Areas where solar and wind energy resources are concentrated are generally relatively far away from the loa...

Claims

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Application Information

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IPC IPC(8): H02J3/38
Inventor 宋兵余群兵朱中华陈俊王文龙徐光福徐浩丁浩川刘永钢
Owner NR ELECTRIC CO LTD
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