This article has been accepted for inclusion in a future issue of this journal. Content is final as presented, with the exception of pagination. IEEE SYSTEMS JOURNAL 1 IEC 61850 Modeling of DSTATCOM and XMPP Communication for Reactive Power Management in Microgrids S. M. Suhail Hussain, Student Member, IEEE, Mohd Asim Aftab, Student Member, IEEE, and Ikbal Ali, Senior Member, IEEE Abstract—Intermittency of renewable energy resources makes reactive power management a challenge in microgrids. Since stan- dards do not recommend the use of distributed energy resources (DERs) for voltage regulation and reactive power management in microgrids, therefore, traditionally, locally controlled Distribu- tion STATic COMpensators (DSTATCOM) are widely used. The management of reactive power requirement in microgrids can be improved through communication-based coordinated operation of DERs and DSTATCOM. To make this communication standard- ized and interoperable, this paper presents modeling of DSTAT- COM as per IEC 61850 and an eXtensible Message Presence Protocol (XMPP) for providing scalability and information secu- rity. The mapping of IEC 61850 Abstract Communication Service Interface services over MMS ASN.1 XER (XMPP—web protocol) to transform the basic MMS type message into an XML message for their use in XMPP communication is also demonstrated. Index Terms—Distribution STATic COMpensator (DSTAT- COM), eXtensible Message Presence Protocol (XMPP), IEC 61850, microgrid, reactive power management. NOMENCLATURE v acref Reference ac voltage. v m Measured bus voltage. v r Regulated voltage. i regulated Output current from the current regulator. P ems Active power reference value. Q ems Reactive power reference value. P m Measured active power. Q m Measured reactive power. V ref Reference voltage. v o Nominal voltage. Q STATCOM Reactive power injection capacity limit of DSTATCOM. m Gain. Manuscript received December 6, 2016; revised March 22, 2017 and August 2, 2017; accepted October 31, 2017. This work was supported in part by the All India Council of Technical Education (AICTE) under Grant 20/AICTE/ RFID/RPS(Policy-IV)21/2012-13 and by the Council of Scientific and In- dustrial Research (CSIR), India, through CSIR-SRF Fellowship vide no. 09/466(0179)2k17 as financial support to M. A. Aftab. (Corresponding author: S. M. Suhail Hussain.) The authors are with the Department of Electrical Engineering, Jamia Millia Islamia (A Central University), New Delhi 110025, India (e-mail: suhail@ieee. org; mohdasimaftab4@gmail.com; iali1@jmi.ac.in). Digital Object Identifier 10.1109/JSYST.2017.2769706 k Proportionality factor to provide maximum re- active power compensation. p Number of DERs in the microgrid. ω Operating frequency of the microgrid. ω o Rated or base frequency of the microgrid. V o Rated or base voltage. k f Frequency droop gain. k v Voltage droop gain. ACSI Abstract communication service interface. ARCO Logical node for parameters related to automatic reactive power compensation for DSTATCOM. AVCO Logical node for parameters related to automatic voltage compensation for DSTATCOM. CDC Common data class. DCCT Logical node for economic dispatch parameters. DCHB Logical node for characteristics of boiler of com- bined heat and power (CHP). DCHC Logical node for overall information about com- bined heat and power system. DCIP Logical node for reciprocating engine character- istics and controls. DCTS Logical node for characteristics of thermal stor- age for both heat exchanger and coolant storage. DERs Distributed energy resources. DFLV Logical node for information related to fuel de- livery to the plant. DOPA Logical node for DER operational authority at ECP. DOPM Logical node for settings for DER operating mode at ECPs. DOs Data objects. DPST Logical node for real-time status and measure- ments at ECP. DPVA Logical node for the PV string configuration. DPVC Logical node for information required for criti- cal parameters monitoring of PV string. DPVM Logical node for photovoltaic module charac- teristics such as open-circuit voltage and rated power. DRCC Logical node for the control actions for one DER unit. DRCS Logical node for control status of a DER unit. 1937-9234 © 2018 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission. See http://www.ieee.org/publications standards/publications/rights/index.html for more information.