PATENT CLAIM ANALYSIS

Application Number: 15933856
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2019-06
Patent Classification: ["322", "032000"]

Abstract:
An AC excitation synchronous condenser and a control method, an AC-excitation induction machine, a full-controlled AC excitation converter, a grid-side converter and a controller. The AC-excitation induction machine is the core power converting device, and its stator and rotor windings are AC windings with terminals. The controller is configured to control the full-controlled AC excitation converter to perform excitation and speed regulation on the AC-excitation induction machine and also control the grid-side converter to ensure the excitation capability of the full-controlled AC excitation converter, so that support and regulation of the active power and reactive power are achieved.

Claim (Index 2):
The AC excitation synchronous condenser of  claim 1 , wherein the controller further comprise: an event and command control module, a rotating speed and reactive power control module, an excitation current control module and a DC voltage control module;\n the event and command control module has a first input terminal for receiving a superior reactive power command Q* in  and a second input terminal for receiving voltage and frequency signals of the local power grid, and is configured to receive the superior reactive power command Q* in , collect a measured voltage U and a measured frequency f and then process the input signals according to a working mode, a rated voltage U N , a rated frequency f N , a maximum rotating speed command \u03c9* r max  and a minimum rotating speed command \u03c9* r min  that are preset, so as to obtain a reactive power command Q* and a rotating speed command \u03c9* r ; the rotating speed and reactive power control module has a first input terminal which is connected to a first output terminal of the event and command control module, a second input terminal which is connected to a second output terminal of the event and command control module, a third input terminal for receiving an instantaneous reactive power Q output from the AC excitation synchronous condenser to the local power grid and a fourth input terminal for receiving a measured rotating speed \u03c9 r  of the AC-excitation induction machine, and is configured to receive the reactive power command Q* and the rotating speed command \u03c9* r , collect the instantaneous reactive power Q and the measured rotating speed \u03c9 r  and then process the input signals according to a rotor maximum reactive current command I* rq max , a rotor minimum reactive current command I* rq min , a rotor maximum active current command I* rd max  and a rotor minimum active current command I* rd min  that are preset, so as to obtain a rotor reactive current command I* rq  and a rotor active current command I* rd ; the excitation current control module has a first input terminal which is connected to a first output terminal of the rotating speed and reactive power control module, a second input terminal which is connected to a second output terminal of the rotating speed and reactive power control module and a third input terminal for receiving current signals, and is configured to receive the rotor reactive current command I* rq  and the rotor active current command I* rd , collect a rotor active current I rd , a rotor reactive current I rq , a stator active current I sd  and a stator reactive current I sq  of the AC-excitation induction machine as well as a slip frequency angular velocity \u03c9 s , and then process the input signals according to a maximum excitation current capacity I max  of the full-controlled AC excitation converter, an excitation inductance L m  of the AC-excitation induction machine and a rotor inductance L r  of the AC-excitation induction machine, so as to obtain an excitation voltage command for the full-controlled AC excitation converter, so that the full-controlled AC excitation converter is controlled to perform AC excitation of the AC-excitation induction machine; the DC voltage control module has a first input terminal for receiving a DC bus voltage U dc  and a second input terminal for receiving voltage and current signals of the local power grid, and is configured to receive the DC bus voltage U dc , collect an active current I gd  and a reactive current I gq  output from the grid-side converter, a d-axis component U gd  and a q-axis component U gq  of a voltage at the access point of the grid-side converter and a power grid voltage angular velocity \u03c9 1 , and then process the input signals according to a DC bus voltage command U* dc , a resistance R g  of a filter in the grid-side converter and an inductance L g  of the filter in the grid-side converter to obtain a control voltage of the grid-side converter, so as to maintain the stability of the DC bus voltage, so that it is ensured that the full-controlled AC excitation converter has sufficient excitation control capability.

Metadata:
- Claim Count in Document: 16.0
- Percentile: 90.0
- Lexical Diversity: 2.16327
- Patent Class: 322.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['13638546', '12979030', '16313951', '14323380', '14314484']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6830430891486947
- 35 USC 102 Novelty (BERT): 0.5470692570587601
- Combined Prediction Score: 0.6694457059397012
- Mean Citation Score: 275.74293800000004
- Max Citation Score: 327.39853
- Similarity Product: 235.3509460996294

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 0
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test