A wide-area measurement-based evaluation method for power system stabilizers
A power system and wide-area measurement technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve problems such as the mutual influence of different PSSs that have not been assessed, and achieve the effect of strengthening management and improving safety
Active Publication Date: 2016-03-30
STATE GRID CORP OF CHINA +1
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In addition, in an interconnected multi-computer system, multiple PSSs often have adverse mutual effects. At present, the above guidelines do not examine the mutual effects between different PSSs
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[0035] The implementation of the present invention will be described in further detail below. The following examples are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.
[0036] A method for evaluating a power system stabilizer based on wide-area measurement, the steps of the method comprising:
[0037] (1) The transformation of the existing stabilizer system, specifically including:
[0038] ① Add an input channel to the stabilizer (PSS) device of each unit, which is used to access a control signal with a synchronous time scale, which can control the input and exit of the PSS function;
[0039] ② Connect the output of the PSS device of each unit to the local synchronized phasor measurement unit (PMU) device, mark the synchronization time stamp, and send it to the WAMS master station;
[0040] ③ Connect the three-phase voltage, three-phase current, excitation voltage, and excitation current of each unit to the local PMU devic...
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The invention relates to a power system stabilizer evaluation method based on wide-area measurement. The power system stabilizer evaluation method includes the first step of transforming an existing stabilizer system, the second step of checking historical non-vanishing continuous sub time frames outputted by a stabilizer of the nth generator set, the third step of judging whether the stabilizer refuses to start or not, the fourth step of carrying out judgment under the condition that the stabilizer has output signals, and the fifth step of judging whether output of the stabilizer of the nth generator causes negative influences on other generator sets or not. The power system stabilizer evaluation method solves the problem that the power system stabilizer is lacking in technological means of daily evaluation for a long time, can provide objective data support for factory network coordination, enables management of power generation dispatching to be enhanced, can be used for timely and accurately searching for weak links of operation of an electrical power system, and improves safety and stability of the electric power system.
Description
technical field [0001] The invention belongs to the technical field of power system stabilizers in power system wide-area measurement systems, in particular to an evaluation method for power system stabilizers based on wide-area measurement. Background technique [0002] The main function of the power system stabilizer (PSS) is to make the synchronous generator generate the local damping torque in phase with the speed deviation. State Grid Corporation's enterprise standard Q / GDW143-2012 "Guidelines for Setting Tests of Power System Stabilizers" (replacing Q / GDW143-2006) requires evaluation of the effect of power system stabilizer setting. The newly published industry standard DL / T1231-2013 "Guidelines for Setting Tests of Power System Stabilizers" also uses the same expression. In addition, in an interconnected multi-computer system, multiple PSSs often have adverse mutual influences. At present, the above guidelines do not examine the mutual influences between different PS...
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IPC IPC(8): G01R31/00
Inventor 袁世强陈培育郭凌旭郗洪涛郑卫洪李晓辉于光耀王峥
Owner STATE GRID CORP OF CHINA