A new algorithm for calculating utility harmonic impedance
•Estimation accuracy is improved when harmonic impedance ratio is about 1.•The idea is the weak correlation of harmonic current fluctuation.•This algorithm has a strong ability to resist non-stationary signal interference. In engineering, it is very valuable to estimate the utility harmonic impedanc...
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| Veröffentlicht in: | Electric power systems research 2021-02, Vol.191, p.106893, Article 106893 |
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| container_title | Electric power systems research |
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| creator | Shu, Qin Liu, Tongyu Xu, Fangwei |
| description | •Estimation accuracy is improved when harmonic impedance ratio is about 1.•The idea is the weak correlation of harmonic current fluctuation.•This algorithm has a strong ability to resist non-stationary signal interference.
In engineering, it is very valuable to estimate the utility harmonic impedance of a point of common coupling (PCC). However, the existing methods usually assume that the customer harmonic impedance is much larger than the utility harmonic impedance, if not, the estimated accuracy is hard to meet engineering requirement. Unfortunately, in modern power grid, due to the influence of filters or reactive compensation capacitors installed on the customer side of a PCC, the above assumption is no longer valid. This paper proposes a new algorithm to overcome this problem, the proposed algorithm can get a fairly good estimated result while the amplitude of utility harmonic impedance is approximately equal to the customer harmonic impedance. In this algorithm, firstly, the amplitude of utility harmonic impedance is calculated by using the weak correlation of the fluctuation of the harmonic sources on both sides of a PCC, and the impedance angle can be obtained through minimizing background harmonic fluctuation energy. Simulation and field case verify the effectiveness. |
| doi_str_mv | 10.1016/j.epsr.2020.106893 |
| format | Article |
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In engineering, it is very valuable to estimate the utility harmonic impedance of a point of common coupling (PCC). However, the existing methods usually assume that the customer harmonic impedance is much larger than the utility harmonic impedance, if not, the estimated accuracy is hard to meet engineering requirement. Unfortunately, in modern power grid, due to the influence of filters or reactive compensation capacitors installed on the customer side of a PCC, the above assumption is no longer valid. This paper proposes a new algorithm to overcome this problem, the proposed algorithm can get a fairly good estimated result while the amplitude of utility harmonic impedance is approximately equal to the customer harmonic impedance. In this algorithm, firstly, the amplitude of utility harmonic impedance is calculated by using the weak correlation of the fluctuation of the harmonic sources on both sides of a PCC, and the impedance angle can be obtained through minimizing background harmonic fluctuation energy. Simulation and field case verify the effectiveness.</description><identifier>ISSN: 0378-7796</identifier><identifier>EISSN: 1873-2046</identifier><identifier>DOI: 10.1016/j.epsr.2020.106893</identifier><language>eng</language><publisher>LAUSANNE: Elsevier B.V</publisher><subject>Algorithms ; Amplitudes ; Customer services ; Customers ; Electric power grids ; Electricity distribution ; Engineering ; Engineering, Electrical & Electronic ; Fluctuation energy ; Harmonic analysis ; Harmonic impedance ; Impedance ; Mathematical analysis ; Science & Technology ; Simulation ; Technology ; Weak correlation</subject><ispartof>Electric power systems research, 2021-02, Vol.191, p.106893, Article 106893</ispartof><rights>2020 Elsevier B.V.</rights><rights>Copyright Elsevier Science Ltd. Feb 2021</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>true</woscitedreferencessubscribed><woscitedreferencescount>10</woscitedreferencescount><woscitedreferencesoriginalsourcerecordid>wos000598058200003</woscitedreferencesoriginalsourcerecordid><citedby>FETCH-LOGICAL-c328t-5b1d388185b37ce92eeecd9548f16937ff4dc1536b9e7fd9e9ff437be5e8f26b3</citedby><cites>FETCH-LOGICAL-c328t-5b1d388185b37ce92eeecd9548f16937ff4dc1536b9e7fd9e9ff437be5e8f26b3</cites><orcidid>0000-0003-1557-7737</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.epsr.2020.106893$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Shu, Qin</creatorcontrib><creatorcontrib>Liu, Tongyu</creatorcontrib><creatorcontrib>Xu, Fangwei</creatorcontrib><title>A new algorithm for calculating utility harmonic impedance</title><title>Electric power systems research</title><addtitle>ELECTR POW SYST RES</addtitle><description>•Estimation accuracy is improved when harmonic impedance ratio is about 1.•The idea is the weak correlation of harmonic current fluctuation.•This algorithm has a strong ability to resist non-stationary signal interference.
In engineering, it is very valuable to estimate the utility harmonic impedance of a point of common coupling (PCC). However, the existing methods usually assume that the customer harmonic impedance is much larger than the utility harmonic impedance, if not, the estimated accuracy is hard to meet engineering requirement. Unfortunately, in modern power grid, due to the influence of filters or reactive compensation capacitors installed on the customer side of a PCC, the above assumption is no longer valid. This paper proposes a new algorithm to overcome this problem, the proposed algorithm can get a fairly good estimated result while the amplitude of utility harmonic impedance is approximately equal to the customer harmonic impedance. In this algorithm, firstly, the amplitude of utility harmonic impedance is calculated by using the weak correlation of the fluctuation of the harmonic sources on both sides of a PCC, and the impedance angle can be obtained through minimizing background harmonic fluctuation energy. Simulation and field case verify the effectiveness.</description><subject>Algorithms</subject><subject>Amplitudes</subject><subject>Customer services</subject><subject>Customers</subject><subject>Electric power grids</subject><subject>Electricity distribution</subject><subject>Engineering</subject><subject>Engineering, Electrical & Electronic</subject><subject>Fluctuation energy</subject><subject>Harmonic analysis</subject><subject>Harmonic impedance</subject><subject>Impedance</subject><subject>Mathematical analysis</subject><subject>Science & Technology</subject><subject>Simulation</subject><subject>Technology</subject><subject>Weak correlation</subject><issn>0378-7796</issn><issn>1873-2046</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>HGBXW</sourceid><recordid>eNqNkE1LxDAQhoMouH78AU8Fj9I1H02TiBdZ_IIFL3oObTpxs3SbmqaK_96ULh7FU4bhfSYzD0IXBC8JJuX1dgn9EJYU06lRSsUO0IJIwXKKi_IQLTATMhdClcfoZBi2GONSCb5AN3dZB19Z1b774OJml1kfMlO1Zmyr6Lr3bIyudfE721Rh5ztnMrfroak6A2foyFbtAOf79xS9Pdy_rp7y9cvj8-punRtGZcx5TRomJZG8ZsKAogBgGsULaUmpmLC2aAzhrKwVCNsoUKnDRA0cpKVlzU7R5Ty3D_5jhCHqrR9Dl77UlKdjcSEKkVJ0TpnghyGA1X1wuyp8a4L15Ehv9eRIT4707ChBVzP0BbW3g3GQ7voFkySuJOaSpgpPafn_9MrFJNB3Kz92MaG3MwpJ1KeDoPd44wKYqBvv_trzB1Y5kIg</recordid><startdate>202102</startdate><enddate>202102</enddate><creator>Shu, Qin</creator><creator>Liu, Tongyu</creator><creator>Xu, Fangwei</creator><general>Elsevier B.V</general><general>Elsevier</general><general>Elsevier Science Ltd</general><scope>BLEPL</scope><scope>DTL</scope><scope>HGBXW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>8FD</scope><scope>FR3</scope><scope>KR7</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0003-1557-7737</orcidid></search><sort><creationdate>202102</creationdate><title>A new algorithm for calculating utility harmonic impedance</title><author>Shu, Qin ; Liu, Tongyu ; Xu, Fangwei</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c328t-5b1d388185b37ce92eeecd9548f16937ff4dc1536b9e7fd9e9ff437be5e8f26b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Algorithms</topic><topic>Amplitudes</topic><topic>Customer services</topic><topic>Customers</topic><topic>Electric power grids</topic><topic>Electricity distribution</topic><topic>Engineering</topic><topic>Engineering, Electrical & Electronic</topic><topic>Fluctuation energy</topic><topic>Harmonic analysis</topic><topic>Harmonic impedance</topic><topic>Impedance</topic><topic>Mathematical analysis</topic><topic>Science & Technology</topic><topic>Simulation</topic><topic>Technology</topic><topic>Weak correlation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Shu, Qin</creatorcontrib><creatorcontrib>Liu, Tongyu</creatorcontrib><creatorcontrib>Xu, Fangwei</creatorcontrib><collection>Web of Science Core Collection</collection><collection>Science Citation Index Expanded</collection><collection>Web of Science - Science Citation Index Expanded - 2021</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Electric power systems research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Shu, Qin</au><au>Liu, Tongyu</au><au>Xu, Fangwei</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A new algorithm for calculating utility harmonic impedance</atitle><jtitle>Electric power systems research</jtitle><stitle>ELECTR POW SYST RES</stitle><date>2021-02</date><risdate>2021</risdate><volume>191</volume><spage>106893</spage><pages>106893-</pages><artnum>106893</artnum><issn>0378-7796</issn><eissn>1873-2046</eissn><abstract>•Estimation accuracy is improved when harmonic impedance ratio is about 1.•The idea is the weak correlation of harmonic current fluctuation.•This algorithm has a strong ability to resist non-stationary signal interference.
In engineering, it is very valuable to estimate the utility harmonic impedance of a point of common coupling (PCC). However, the existing methods usually assume that the customer harmonic impedance is much larger than the utility harmonic impedance, if not, the estimated accuracy is hard to meet engineering requirement. Unfortunately, in modern power grid, due to the influence of filters or reactive compensation capacitors installed on the customer side of a PCC, the above assumption is no longer valid. This paper proposes a new algorithm to overcome this problem, the proposed algorithm can get a fairly good estimated result while the amplitude of utility harmonic impedance is approximately equal to the customer harmonic impedance. In this algorithm, firstly, the amplitude of utility harmonic impedance is calculated by using the weak correlation of the fluctuation of the harmonic sources on both sides of a PCC, and the impedance angle can be obtained through minimizing background harmonic fluctuation energy. Simulation and field case verify the effectiveness.</abstract><cop>LAUSANNE</cop><pub>Elsevier B.V</pub><doi>10.1016/j.epsr.2020.106893</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0003-1557-7737</orcidid></addata></record> |
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| issn | 0378-7796 1873-2046 |
| language | eng |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | Algorithms Amplitudes Customer services Customers Electric power grids Electricity distribution Engineering Engineering, Electrical & Electronic Fluctuation energy Harmonic analysis Harmonic impedance Impedance Mathematical analysis Science & Technology Simulation Technology Weak correlation |
| title | A new algorithm for calculating utility harmonic impedance |
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