Method for controlling black-start receiving end in high-voltage direct current transmission
A technology of high-voltage direct current transmission and control method, applied in the direction of power transmission and AC network, etc., can solve problems such as rapid recovery of unfavorable receiving end power grid, and achieve the effect of improving frequency fluctuation phenomenon, avoiding long-distance communication, and improving stability
Active Publication Date: 2016-08-03
SICHUAN UNIV
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Problems solved by technology
However, during the black start process of the receiving-end power grid, using the rectifier side to modulate the active power of the receiving-end inevitably faces communication problems such as signal delay and packet loss, which is not conducive to the rapid recovery of the receiving-end power grid
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[0021] The invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. A control method for black start of a high-voltage direct current transmission receiving terminal provided by the present invention includes the following steps:
[0022] Step 1. Adding a constant DC voltage control mode on the HVDC rectification side, that is, the constant DC voltage control mode uses a PI controller, takes the difference between the measured voltage and the reference voltage as input, and uses the trigger angle as output to output the trigger The angle is compared with the trigger angle output of the original constant current control on the rectifier side, and the larger value is taken as the output.
[0023] Step 2. The HVDC inverter side control is based on the original constant current control mode, and the original constant arc extinguishing angle mode is used as the limiter, that is, the constant DC current control mode u...
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The invention discloses a method for controlling black-start a receiving end in high-voltage direct current transmission (HVDC). The method comprises the following steps: a HVDC rectifier side controlling the adding of a constant DC voltage control mode; a HVDC inverter side controlling a constant current control mode based on an original inverter side, with an original constant extinction angle as a limiter, in combination with the newly added constant direct current voltage control mode on the rectifier side, realizing control modes of the rectifier side constant voltage and inverter side constant current of the direct current system; based on the original control mode of the inverter side constant current, adding an additional frequency controller; designing the additional frequency controller and configuring the additional frequency controller through a pole configuration method so as to allow the additional frequency controller to provide positive damping to the system, the additional frequency controller being designed to first-order lead lag link. According to the invention, the method sets a power modulation end to the inverter side, adds the additional frequency controller on the inverter side, realizes the local additional frequency controlling strategy upon the black-start, and increases system stability.
Description
technical field [0001] The invention relates to the field of black start of high-voltage direct current transmission, in particular to a control method for black start of a receiving end of high-voltage direct current transmission. Background technique [0002] Black start means that after the entire system is out of service due to a fault, without relying on the help of other networks, the units with self-starting capabilities in the system drive the units without self-starting capabilities, and gradually expand the scope of system recovery, and finally realize the recovery of the entire system . The traditional power grid black start method generally uses the self-starting fuel oil units and hydroelectric units in the region as the black start power supply to gradually start other large conventional generating units. The use of AC transmission to drive the recovery of the power grid has problems such as slow start-up speed and large start-up impact of auxiliary equipment,...
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IPC IPC(8): H02J3/36
CPCY02E60/60H02J3/36
Inventor 刘天琪李保宏张英敏王渝红王峰丁媛媛
Owner SICHUAN UNIV