{"id":475,"date":"2019-06-26T09:33:51","date_gmt":"2019-06-26T09:33:51","guid":{"rendered":"https:\/\/beta.research.ece.ncsu.edu\/bhattacharya\/?page_id=475"},"modified":"2021-02-03T15:58:12","modified_gmt":"2021-02-03T15:58:12","slug":"lab-facilities","status":"publish","type":"page","link":"https:\/\/research.ece.ncsu.edu\/bhattacharya\/lab-facilities\/","title":{"rendered":"Lab Facilities"},"content":{"rendered":"\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-ncsu-blocks-collapsible-panel block-panel n_mb3  block-panel--collapsed\" data-block-version=\"1.1.0\"><div class=\"block-panel__heading n_relative n_tl n_bg-gray-10 n_text-red\"><h3 class=\"block-panel__heading relative n_db n_w-100 n_ma0\"><button aria-expanded=\"false\" class=\"block-panel__button n_flex n_w-100 n_pa2 n_bn n_bg-transparent n_tl  n_text-red  n_fw7 n_f3 n_ttn n_ma0\"><span class=\"block-panel__label n_underline n_no-underline-hover\">Medium Voltage Lab<\/span><span aria-hidden=\"true\" class=\"block-panel__indicator\">Show More<\/span><\/button><\/h3><\/div><div hidden class=\"block-panel__body n_overflow-hidden n_ease-all n_ba n_b--gray-10\" style=\"height:0\"><div class=\"n_pa3\">\n<p><\/p>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-ncsu-blocks-collapsible-panel block-panel n_mb3  block-panel--collapsed\" data-block-version=\"1.1.0\"><div class=\"block-panel__heading n_relative n_tl n_bg-gray-10 n_text-red\"><p class=\"block-panel__heading relative n_db n_w-100 n_ma0\"><button aria-expanded=\"false\" class=\"block-panel__button n_flex n_w-100 n_pa2 n_bn n_bg-transparent n_tl  n_text-red  n_fw7 n_f3 n_ttn n_ma0\"><span class=\"block-panel__label n_underline n_no-underline-hover\">Real Time Simulators<\/span><span aria-hidden=\"true\" class=\"block-panel__indicator\">Show More<\/span><\/button><\/p><\/div><div hidden class=\"block-panel__body n_overflow-hidden n_ease-all n_ba n_b--gray-10\" style=\"height:0\"><div class=\"n_pa3\">\n<h6 class=\"wp-block-heading\"><a href=\"https:\/\/research.ece.ncsu.edu\/bhattacharya\/lab-facilities\/rtds\/\">RTDS<\/a><\/h6>\n\n\n\n<h6 class=\"wp-block-heading\"><a href=\"https:\/\/research.ece.ncsu.edu\/bhattacharya\/lab-facilities\/opal-rt\/\">OpalRT<\/a><\/h6>\n\n\n\n<h6 class=\"wp-block-heading\"><a href=\"https:\/\/research.ece.ncsu.edu\/bhattacharya\/lab-facilities\/typhoon\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Typhoon (opens in a new tab)\">Typhoon<\/a><\/h6>\n\n\n\n<h6 class=\"wp-block-heading\">PLECS<\/h6>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-ncsu-blocks-collapsible-panel block-panel n_mb3  block-panel--collapsed\" data-block-version=\"1.1.0\"><div class=\"block-panel__heading n_relative n_tl n_bg-gray-10 n_text-red\"><p class=\"block-panel__heading relative n_db n_w-100 n_ma0\"><button aria-expanded=\"false\" class=\"block-panel__button n_flex n_w-100 n_pa2 n_bn n_bg-transparent n_tl  n_text-red  n_fw7 n_f3 n_ttn n_ma0\"><span class=\"block-panel__label n_underline n_no-underline-hover\">New York Power Authority Transient Network Analyzer <\/span><span aria-hidden=\"true\" class=\"block-panel__indicator\">Show More<\/span><\/button><\/p><\/div><div hidden class=\"block-panel__body n_overflow-hidden n_ease-all n_ba n_b--gray-10\" style=\"height:0\"><div class=\"n_pa3\">\n<p>In preparation for commissioning of the series inverters\nfor the NYPA CSC project additional testing on the Transient Network Analyzer\n(TNA) was performed. <\/p>\n\n\n\n<p>The additional tests are referred to as sequence tests\nbecause the aim was to thoroughly examine the control system for areas such as\nstarting, stopping the equipment, and changing between configurations and for\nbehavior during trip conditions. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <\/p>\n\n\n\n<h6 class=\"wp-block-heading\"><strong>CSC TNA One-line diagram <\/strong><\/h6>\n\n\n\n<p>The CSC TNA model comprises two voltage source inverters\n(Inverter #1, Inverter #2) interfaced to the power system with coupling\ntransformers, as illustrated in&nbsp; Figure 6\u20111.\nA dc bus switch (SWDC1) is provided so that the inverters can be operated\neither independently of each other (dc switch open). Alternatively, the dc\nswitch may be closed to allow exchange of real power between the inverters.\nSwitches are also provided so that the ac output of each inverter can be\nconnected to the power system in two different ways.&nbsp; <\/p>\n\n\n\n<p>For shunt compensation, Inverter #1 and Inverter #2 can be\nconnected to LV1 and LV2 respectively, which are the secondary windings of the\nshunt-coupling transformer (TR-SH). For series compensation, Inverter #1 can be\nconnected to the series insertion transformer for the Coopers Corners line, and\nInverter #2 can be connected to the series transformer for the New Scotland\nline. <\/p>\n\n\n\n<p>The TNA one-line closely resembles the one-line of the actual power circuit. Some elements are not modeled <g class=\"gr_ gr_6 gr-alert gr_gramm gr_inline_cards gr_run_anim Punctuation only-ins replaceWithoutSep\" id=\"6\" data-gr-id=\"6\">however<\/g>, for example in practice there are Motor Operated Disconnect (MOD) switches across the series bypass breakers 3222 and 3322 that are not reproduced for the TNA model. <g class=\"gr_ gr_7 gr-alert gr_gramm gr_inline_cards gr_run_anim Punctuation only-ins replaceWithoutSep\" id=\"7\" data-gr-id=\"7\">Similarly<\/g> the Thyristor bypass circuits have MODs to disconnect from the power circuit but these have not been explicitly modeled on the TNA. A low voltage breaker (LVB) model was incorporated into the TNA simulation to represent the operation of two new breakers 3902 and 3908 which are connected on the equipment side of the series transformers.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\"><strong>CSC TNA Hardware<\/strong><\/h6>\n\n\n\n<p>A small-scale analog model of the equipment represents the\nswitching nature of the inverters as well as the nonlinear characteristics of\nthe coupling transformers. The actual control boards were interfaced to the\nanalogue equipment model to test the CSC control algorithms (implemented in the\nDSPs of the RTC) in a real time environment. This real time testing is\nespecially important in a project such as this with its multiple equipment\nconfigurations and various control modes. Successful testing on the TNA\nprovided a high degree of confidence that the series control modes would\nperform as expected when commissioned at site.<\/p>\n\n\n\n<p>The TNA\nmodel for the CSC is a scaled analogue equivalent model of the actual transformers,\nswitches, and inverter equipment connected to the CSC central controls. The\nnominal inverter rating of 100 MVA is scaled to 12 VA and the nominal system\nvoltage (345 kV) is scaled to 100 V. The transformer models (magnetics) are\nspecially designed to represent&nbsp; the per\nunitized saturation (knee point and slope) and leakage reactance of the actual\ntransformers. Special care is taken to minimize resistive losses and to\nminimize as much as practical stray inductance and stray capacitance. The\ntransformer models are sufficiently flexible to allow turns ratios, saturation\nand leakage characteristics to be adjusted.<\/p>\n\n\n\n<p>The inverter valves and thyristor bypass circuits are\nrepresented with low loss FET switches. Switching commands are sent from the\ncentral control Valve Interface Boards (VIB) over a fiber optic link to the\nValve Interface Board Termination (VIBT). The VIBT is specific to the TNA\nmodel. In practice, the fiber optic cables would be terminated on individual\nPole Electronics Boards (PEB) in the inverter hall.<\/p>\n\n\n\n<p>The MODS, circuit switchers, and circuit breakers <g class=\"gr_ gr_8 gr-alert gr_gramm gr_inline_cards gr_run_anim Grammar multiReplace\" id=\"8\" data-gr-id=\"8\">shown<\/g> <g class=\"gr_ gr_7 gr-alert gr_gramm gr_inline_cards gr_run_anim Grammar multiReplace\" id=\"7\" data-gr-id=\"7\">on<\/g> Figure 6\u20111 are modeled by small mechanical relays. The control system can reconfigure the circuit by opening\/closing these switches through solid state relays operated by the control system. The mechanical relays also feed open\/closed status signals back to the controls. The interface of the TNA model to the CSC controls is shown conceptually in Figure 6\u20112. The control loop is closed with a voltage and current measurement board to provide appropriately scaled feedback current and voltage transducer (i.e. measured bus voltages, line currents, inverter current <g class=\"gr_ gr_11 gr-alert gr_gramm gr_inline_cards gr_run_anim Punctuation only-ins replaceWithoutSep\" id=\"11\" data-gr-id=\"11\">etc<\/g>) signals to the <g class=\"gr_ gr_12 gr-alert gr_spell gr_inline_cards gr_run_anim ContextualSpelling multiReplace\" id=\"12\" data-gr-id=\"12\">analogue<\/g> input board of the control system.  <\/p>\n\n\n\n<h6 class=\"wp-block-heading\">Control Modes<\/h6>\n\n\n\n<p>To cover the requirements for the eleven possible circuit\nconfigurations, each inverter has four basic control structures available for\nselection:<\/p>\n\n\n\n<p><strong>STATCOM CONTROL.<\/strong>\nFor shunt operation of the associated inverter. The reactive output current of\nthe inverter is regulated to maintain a desired ac bus voltage. The real\n(power) component of output current is controlled indirectly to maintain the\nnecessary level of dc bus voltage. <\/p>\n\n\n\n<p><strong>SSSC CONTROL.<\/strong>\nFor stand-alone series operation of the associated inverter. The inverter\noutput (series injected) voltage is controlled to be in quadrature with the\nprevailing line current and have a desired magnitude.<\/p>\n\n\n\n<p><strong>UPFC SERIES\nINVERTER CONTROL. <\/strong>For the case where the associated inverter is the series\nelement in a UPFC configuration. The inverter output (series injected) voltage\nis controlled to influence the line power with no restrictions on phase of the\ninjected voltage.<\/p>\n\n\n\n<p><strong>IPFC CONTROL. <\/strong>For\noperation of the associated inverter as one element of an IPFC configuration.\nThe output (series injected) voltage of the inverter is controlled to influence\nthe line power subject to the restriction that real power must not be exchanged\nwith the line unless it can be balanced by the power exchanged by the other\ninverter.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">&nbsp;Power System Modeling<\/h6>\n\n\n\n<p>The CSC interface to\nthe power system model for the NYPA equivalent system is shown in Figure 6\u20113.<\/p>\n\n\n\n<p>Three high power 3-phase amplifiers are used to represent system voltage\nsources at the major busses. The magnitude, phase, and degree of unbalance are\ncontrolled through a separate computer interface. The voltage sources are\nadjusted to establish power flows in the network. A thyristor switch is used to\napply bus faults; the fault impedance, type (e.g. single phase, 3 phase), and\nbus location are controlled by manual \u2018dip\u2019 switches. The incidence angle and\nduration of the fault are controlled by the computer interface.<\/p>\n\n\n\n<p>Source and transfer impedance are selected so that the short circuit levels at the three busses of interest i.e. Marcy, New Scotland, and Coopers Corner are close to the real system. PI section models represent Cooper Corners and New Scotland transmission lines. There are two switched capacitors representing the 200 MVAR capacitor banks at Marcy. The power system model is very flexible. Transfer impedance, load models, and PI section transmission models can be easily configured manually with \u2018dip\u2019 switches. All components are modular and can be readily reconnected with banana plug test leads. Therefore, it is easy to change the network configuration or component values. <\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/research.ece.ncsu.edu\/wp-content\/uploads\/sites\/10\/2019\/06\/1-894x1024.png\" alt=\"\" class=\"wp-image-513\" width=\"438\" height=\"501\" srcset=\"https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/06\/1-894x1024.png 894w, https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/06\/1-262x300.png 262w, https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/06\/1-768x880.png 768w, https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/06\/1.png 1459w\" sizes=\"auto, (max-width: 438px) 100vw, 438px\" \/><figcaption>Figure 6-1 CSC TNA One-line Diagram<\/figcaption><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/research.ece.ncsu.edu\/wp-content\/uploads\/sites\/10\/2019\/06\/2-1-1024x737.png\" alt=\"\" class=\"wp-image-515\" width=\"1024\" height=\"737\" srcset=\"https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/06\/2-1-1024x737.png 1024w, https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/06\/2-1-300x216.png 300w, https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/06\/2-1-768x553.png 768w, https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/06\/2-1.png 1492w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>Figure 6-2 Interface of CSS Controls to TNA Model <\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1600\" height=\"729\" src=\"https:\/\/research.ece.ncsu.edu\/wp-content\/uploads\/sites\/10\/2019\/07\/b5633c7c-34d5-4b99-8836-b5ccb395c789-4.jpg\" alt=\"Figure\" class=\"wp-image-713\" srcset=\"https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/07\/b5633c7c-34d5-4b99-8836-b5ccb395c789-4.jpg 1600w, https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/07\/b5633c7c-34d5-4b99-8836-b5ccb395c789-4-300x137.jpg 300w, https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/07\/b5633c7c-34d5-4b99-8836-b5ccb395c789-4-768x350.jpg 768w, https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/07\/b5633c7c-34d5-4b99-8836-b5ccb395c789-4-1024x467.jpg 1024w\" sizes=\"auto, (max-width: 1600px) 100vw, 1600px\" \/><\/figure><\/div>\n\n\n\n<p style=\"text-align:center\" class=\"has-small-font-size\">Figure 6-3 NYPA TNA Setup <\/p>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-ncsu-blocks-collapsible-panel block-panel n_mb3  block-panel--collapsed\" data-block-version=\"1.1.0\"><div class=\"block-panel__heading n_relative n_tl n_bg-gray-10 n_text-red\"><p class=\"block-panel__heading relative n_db n_w-100 n_ma0\"><button aria-expanded=\"false\" class=\"block-panel__button n_flex n_w-100 n_pa2 n_bn n_bg-transparent n_tl  n_text-red  n_fw7 n_f3 n_ttn n_ma0\"><span class=\"block-panel__label n_underline n_no-underline-hover\">Magnetic Characterization Setup <\/span><span aria-hidden=\"true\" class=\"block-panel__indicator\">Show More<\/span><\/button><\/p><\/div><div hidden class=\"block-panel__body n_overflow-hidden n_ease-all n_ba n_b--gray-10\" style=\"height:0\"><div class=\"n_pa3\">\n<p><strong>Circuit Topology<\/strong><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"alignright size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/research.ece.ncsu.edu\/wp-content\/uploads\/sites\/10\/2019\/07\/111.png\" alt=\"\" class=\"wp-image-647\" width=\"655\" height=\"273\" srcset=\"https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/07\/111.png 825w, https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/07\/111-300x125.png 300w, https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/07\/111-768x320.png 768w\" sizes=\"auto, (max-width: 655px) 100vw, 655px\" \/><\/figure><\/div>\n\n\n\n<p>Using the latest silicon carbide devices, this test circuit is rated for 1700 V<sub>DC<\/sub> and 75 A, providing a wide range of characterization capabilities. With two stages, the circuit can provide true \u2018flat top\u2019 trapezoidal current. It can also provide multiple slope excitation as seen in multiport dual active bridges, volts \/ turn mismatched active bridges and a variety of other test circuits. Multiple low voltage side converters can be paralleled to provide nearly infinite possibilities including sinus \/ resonant excitation at switching frequencies, quasi resonant and DC offset excitations with minimal filter requirements. Initial research has focused on characterizing soft magnetic material where we found traditional techniques can lead to measurement errors between -38% to 400%. Our work has contributed to the National Energy Technology Laboratory soft magnetic material data sheet development: netl.doe.gov\/TRS<\/p>\n\n\n\n<p><strong>Example Trapezoidal Excitation <\/strong><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"480\" height=\"234\" src=\"https:\/\/research.ece.ncsu.edu\/wp-content\/uploads\/sites\/10\/2019\/07\/22.png\" alt=\"\" class=\"wp-image-648\" srcset=\"https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/07\/22.png 480w, https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/07\/22-300x146.png 300w\" sizes=\"auto, (max-width: 480px) 100vw, 480px\" \/><\/figure>\n\n\n\n<p><em> Voltage and current for dual slope excitation emulating a DAB <\/em><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"630\" height=\"319\" src=\"https:\/\/research.ece.ncsu.edu\/wp-content\/uploads\/sites\/10\/2019\/07\/33.jpg\" alt=\"\" class=\"wp-image-649\" srcset=\"https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/07\/33.jpg 630w, https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/07\/33-300x152.jpg 300w\" sizes=\"auto, (max-width: 630px) 100vw, 630px\" \/><\/figure>\n\n\n\n<p><em> Hysteresis loops using accurate characterization, V<sub>tr<\/sub>, and traditional, square excitation, techniques <\/em><\/p>\n<\/div>\n<\/div>\n\n\n\n<p><strong>Relevant\nPublications<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>R. Beddingfield, S. Bhattacharya, D. Storelli, Circuit for Providing Variable Waveform Excitation, Provisional Patent: 98192\/1063283, 62\/583,843, November 10, 2017, United States<\/li><li>R. Beddingfield, P. Vora, D. Storelli and S. Bhattacharya, &#8220;Trapezoidal characterization of magnetic materials with a novel dual voltage test circuit,&#8221; 2017 IEEE Energy Conversion Congress and Exposition (ECCE), Cincinnati, OH, 2017, pp. 439-446.<\/li><li>R. Beddingfield, S. Bhattacharya, &#8220;Multi-parameter Magnetic Material Characterization for High Power Medium Frequency Converters&#8221;, The Materials, Metals, &amp; Materials Society (TMS) Supplemental Proceedings, 2017, 693-708<\/li><li>R. Beddingfield, D. Storelli and S. Bhattacharya, &#8220;A novel dual voltage source converter for magnetic material characterization with trapezoidal excitation,&#8221; <em>2017 IEEE Applied Power Electronics Conference and Exposition (APEC)<\/em>, Tampa, FL, 2017, pp. 1659-1666.<\/li><\/ol>\n\n\n\n<p><strong>Collaborators<\/strong><\/p>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"454\" height=\"224\" src=\"https:\/\/research.ece.ncsu.edu\/wp-content\/uploads\/sites\/10\/2019\/07\/aa.jpg\" alt=\"\" class=\"wp-image-651\" srcset=\"https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/07\/aa.jpg 454w, https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/07\/aa-300x148.jpg 300w\" sizes=\"auto, (max-width: 454px) 100vw, 454px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"137\" height=\"55\" src=\"https:\/\/research.ece.ncsu.edu\/wp-content\/uploads\/sites\/10\/2019\/07\/bb.png\" alt=\"\" class=\"wp-image-652\"\/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/research.ece.ncsu.edu\/wp-content\/uploads\/sites\/10\/2019\/07\/dd.png\" alt=\"\" class=\"wp-image-653\" width=\"155\" height=\"28\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"407\" height=\"57\" src=\"https:\/\/research.ece.ncsu.edu\/wp-content\/uploads\/sites\/10\/2019\/07\/00.png\" alt=\"\" class=\"wp-image-657\" srcset=\"https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/07\/00.png 407w, https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/07\/00-300x42.png 300w\" sizes=\"auto, (max-width: 407px) 100vw, 407px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/research.ece.ncsu.edu\/wp-content\/uploads\/sites\/10\/2019\/07\/6.png\" alt=\"\" class=\"wp-image-654\" width=\"101\" height=\"101\" srcset=\"https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/07\/6.png 280w, https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/07\/6-150x150.png 150w\" sizes=\"auto, (max-width: 101px) 100vw, 101px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/research.ece.ncsu.edu\/wp-content\/uploads\/sites\/10\/2019\/07\/1200px-NASA_logo.svg_-1024x857.png\" alt=\"\" class=\"wp-image-655\" width=\"82\" height=\"68\" srcset=\"https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/07\/1200px-NASA_logo.svg_-1024x857.png 1024w, https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/07\/1200px-NASA_logo.svg_-300x251.png 300w, https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/07\/1200px-NASA_logo.svg_-768x643.png 768w, https:\/\/research.ece.ncsu.edu\/bhattacharya\/wp-content\/uploads\/sites\/10\/2019\/07\/1200px-NASA_logo.svg_.png 1200w\" sizes=\"auto, (max-width: 82px) 100vw, 82px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/research.ece.ncsu.edu\/wp-content\/uploads\/sites\/10\/2019\/07\/77777.png\" alt=\"\" class=\"wp-image-656\" width=\"116\" height=\"48\"\/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p class=\"has-small-font-size\">This technical effort was performed in support of the\nNational Energy Technology Laboratory\u2019s ongoing research under the RES contract\nDE-FE0004000.<\/p>\n<\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":54,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-landing.php","meta":{"_acf_changed":false,"_uag_custom_page_level_css":"","footnotes":""},"class_list":["post-475","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Lab Facilities - Power Electronics Research Group<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/research.ece.ncsu.edu\/bhattacharya\/lab-facilities\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Lab Facilities - Power 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