Eaton Cooper Power Series Installation, Operation And Maintenance Manual

Also see for COOPER POWER SERIES: Installation and operation instructions Installation instructions Installation instructions Installation and operation instructions Operation instructions

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Eaton Cooper Power Series Installation, Operation And Maintenance Manual Manual pdf 135 page image

Co-generation modeThe Co-generation setting is intended for applications wheredistributed generation is present on the load bushing sideof the voltage regulator, and where reverse power as aresult of feeder switching is not possible. When the controlis set for co-generation, a measured voltage from the loadbushing is required, but a source voltage is not required.See Figure 29.Figure 29 Co-generation regulation pointsMETERING: See Figure 30. Always operates in the forwarddirection except that load center voltage is calculated basedupon the reverse line-drop compensation settings (FC 54and FC 55) when the fixed 1% reverse metering thresholdis exceeded. The Reverse Power indicator turns on whenthis reverse threshold is crossed. The forward line-dropcompensation settings (FC 4 and FC 5) are used when thecurrent exceeds the fixed 1% forward metering threshold.The demand values acquired during reverse power floware stored as reverse metered data, but the values are notscaled (to reflect the other side of the regulator) since theoperating direction of the regulator never truly reverses.Figure 30 Co-generation meteringOPERATION: See Figure 31. The control always regulatesvoltage in the forward direction. The control will regulate inthe forward direction, but will use the reverse settings forset voltage (FC 51), bandwidth (FC 52), time delay (FC 53),and line-drop compensation (FC 54 and FC 55) when thereal component of the current is above the fixed 1% reversemetering threshold. The control will continue to use thereverse settings until the real component of the current isabove the fixed 1% forward metering threshold.Figure 31 Co-generation mode operationReactive bi-directional modeWhen FC 56 is set for Reactive Bi-directional, sourcevoltage is required, either measured or calculated.This mode is recommended for installations wherereverse power flow may occur and the real componentof the current is below the operator-defined threshold(FC 57), except where the source of reverse power is aco-generation facility or independent power producer.METERING: See Figure 32. A threshold level of 1% (.002A) of the full load CT secondary current of .200 A is usedin setting the power direction. The metering will be forwarduntil the current exceeds the 1% threshold in the reversedirection. At this time, the various parameters use thereverse settings and the Reverse Power indicator turns on.The control continues metering in reverse until the currentexceeds the 1% threshold in the forward direction, then theparameter scaling reverts back to the normal and ReversePower indicator turns off.OPERATION: See Figure 32. The control determineswhich settings (forward/reverse) to use by sensing thereal and reactive components of the current. The controloperates in the forward direction whenever the magnitudeof the reactive component of the current exceeds theoperator-defined threshold (FC 57) in the negative direction.The control also operates in the forward direction if themagnitude of the real component of the current exceedsthe operator-defined threshold (FC 57) in the positivedirection while the magnitude of the reactive componentof the current is between the operator-defined thresholds(FC 57). The control operates in the reverse direction usingthe reverse settings at FC 51, FC 52, FC 53, FC 54, and FC55 whenever the magnitude of the reactive component ofthe current exceeds the operator-defined threshold (FC 57)in the positive direction. The control also operates in thereverse direction if the magnitude of the real component ofthe current exceeds the operator-defined threshold (FC 57)in the negative direction while the magnitude of the reactivecomponent of the current is between the operator-definedthresholds (FC 57).129INSTALLATION, OPERATION, AND MAINTENANCE INSTRUCTIONS MN225003EN April 2018CL-7 Voltage Regulator Control