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 9):
The control method of  claim 4 , wherein the step S 5  specifically includes the following steps:\n S 501 : receiving the rotor reactive current command I* rq  and the rotor active current command I* rd ; \n S 502 : according to a maximum excitation current capacity I max  of the full-controlled AC excitation converter, limiting and allocating the dynamic active current command and reactive current command in a manner that the reactive current is preferred, so as to obtain an actual active current command I* rdt  and an actual reactive current command I* rqt  of the full-controlled AC excitation converter; after the limitation and allocation, the actual active current command I* rdt  and the actual active current command I* rqt  of the full-controlled AC excitation converter are calculated by the following formulas: \n { ( I rdt * = I rd * , I rqt * = I rq * ) I rd * 2 + I rq * 2 , , I max ( I rdt * = Sgn \ue8a0 ( I rd * ) \ue89e max \ue8a0 ( I max 2 - I rq * 2 , 0 ) , I rqt * = I rq * ) I rd * 2 + I rq * 2 > I max , \n \ue89e where \ue89e \ue89e Sgn \ue8a0 ( I rd * ) = { 1 I rd * > 0 0 I rd * = 0 - 1 I rd * < 0 ; S 503 : obtaining 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 S 504 : according to an excitation inductance L m  and a rotor inductance L r  of the AC-excitation induction machine, obtaining a d-axis component U* rd  and a q-axis component U* rq  of an excitation voltage command through the proportional-integral operation, in which the d-axis component U* rd  and q-axis component U* rq  of the excitation voltage command are calculated by the following formulas: { U rd * = K pi \ue8a0 ( I rdt * - I rd ) + K ii \ue89e \u222b ( I rdt * - I rd ) \ue89e dt + R r \ue89e I rd - \u03c9 s \ue8a0 ( L m \ue89e I sq + L r \ue89e I rq ) U rq * = K pi \ue8a0 ( I rqt * - I rq ) + K ii \ue89e \u222b ( I rqt * - I rq ) \ue89e dt + R r \ue89e I rq + \u03c9 s \ue8a0 ( L m \ue89e I sd + L r \ue89e I rd ) , where K pi  represents a proportional coefficient of the excitation current control, and K ii  represents an integration coefficient of the excitation current control.

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): 0.6829618928127439
- 35 USC 102 Novelty (BERT): 0.5493676766688662
- Combined Prediction Score: 0.6696024711983561
- Mean Citation Score: 275.74293800000004
- Max Citation Score: 327.39853
- Similarity Product: 213.3870553868592

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