Nanjing Nanrui Jibao PCS9611C Line Protection Measurement and Control Device

Nanjing Nanrui Jibao PCS9611C Line Protection Measurement and Control Device

1 Analog input

The AC volume of a conventional substation is introduced by the AC plug of the device through a conventional transformerEnter. This device can introduce the following analog quantities: Phase protection current（Ia TheIb TheIc）Three phase measurement of current（IamTheIbmTheIcm）Three phase bus voltage（UaTheUb TheUc）The route Voltage（Ux）Zero sequence current（I0）. After the external current input is isolated and transformed by an isolation transformerLow pass filter to analog-to-digital converter, again by CPU Timed sampling.

CPUProcess the obtained digital signals to form various protectionsrelay.

Ia TheIb TheIc To protect the three-phase current input.

I0 Can be used as zero sequence overcurrent protection (trip or alarm)），It also serves as an input for small current grounding line selection.

IamTheIbmTheIcmTo measure the use of three-phase electricityStream input.

Ua TheUb TheUc For the bus voltage, the voltage can beY-shaped access or V-shaped access, used as protection and measurement in this device Shared, it and IamTheIbmTheIcmCalculate together to form this interval P TheQ TheCOSφ ThekWh TheKVarh.

Ux For line voltage, it is used when there is no voltage in the reclosing circuit. It can be 100V or 57.7V Just need to consider the device parameters In the fixed value“line PTRated secondary value”agreement.

If there is no corresponding busbar on site PTOr the functions used by this device do not involve electricityPressure, then UaTheUbTheUcNot to be introduced. To prevent Misdelivery of stop device PT The disconnection signal needs to be included in the protection setting“PT Wire breakage detection investment”Control word exit. ifDo not apply reclosing or reclosing The gate adopts a non inspection method,UxIt can also be omitted.

2 Backboard wiring instructions

CPUplugin B01(Corresponding to the following terminals 0101～0116).

This configuration provides two Ethernet ports(Two twisted pair Ethernet cables).

terminal 0102～0105 For serial port 1, standard RS-485 Mouth, used for communication with the substation backendOr communicate with remote control units.

terminal 0106～0109 For serial port 2, standard RS-485 Port, used for communication with the substation backend or remote control unit.

terminal 0110～0113 For hard contact timing input port, connect 485 Differential electricityPing.

terminal 0114～0116 For the printing port.

communication plugin B04/B05Only equipped in conventional substations(rightThe following terminals should be used 0401～0424).

terminal 0401～0404 Input the bus voltage.

terminal 0405～0406 For line voltage input, it can be 100V or 57.7VIt needs to be determined in accordance with the equipment parameter settings“line PT Rated secondary value”agreement.

terminal 0411～0412 For protection purposes APhase current input.

terminal 0413～0414 For protection purposes BPhase current input.

terminal 0415～0416 For protection purposes CPhase current input.

terminal 0417～0418 Input zero sequence current.

terminal 0419～0420 for APhase measurement current input.

terminal 0421～0422 for BPhase measurement current input.

terminal 0423～0424 for CPhase measurement current input.

Export plugin(B06)Belonging to optional plugins(Corresponding to the following terminals 0601～0622).

terminal 0601～0602 Corresponding to the second group of remote control trip outlet contacts.

terminal 0603～0604 Corresponding to the second group of remote control closing outlet contacts.

terminal 0605～0606 Corresponding to the third group of remote control trip outlet contacts.

terminal 0607～0608 Corresponding to the third group of remote control closing outlet contacts.

terminal 0609～0610 Corresponding to the fourth group of remote control trip outlet contacts.

terminal 0611～0612 Corresponding to the fourth group of remote control closing outlet contacts.

terminal 0613～0614 Corresponding trip outlet2 Contact point.

terminal 0615～0616 Corresponding trip outlet 3 Contact point.

terminal 0617～0618 Corresponding to the closing exit2 Contact point.

terminal 0619～0620 Corresponding backup export 1 Contact point.

terminal 0621～0622 Corresponding backup export2 Contact point.

Insert plugin B07(Corresponding to the following terminals 0701～0722).

terminal 0701～0721 Input terminal for remote signaling, terminal 0722 To open the public negative terminal.

terminal 0701～0715 Open for regular remote signaling.

terminal 0716 Open for low-frequency load shedding.

terminal 0717 To lock the reclosing switch in.

terminal 0718 If there is no energy storage for the spring, there will be a delay 400 Millisecond locking and reclosing.

terminal 0719 Drive in to a distant location. Only when it is connectedThe remote jump and remote close functions are only activated when the device is powered on. terminal 0720 Return the signal to its original state.

terminal 0721 Open for device maintenance. When the switch is activated, the device will block all remote control functions.

Nanjing Nanrui Jibao PCS9611C Line Protection Measurement and Control Device

1. Software working principle

1.1 Device start-up components

The device has set different starting elements for each protective element, and the calculation of protective elements can only be carried out after startingThe device has dual sampling capability Sample technology, the main channel samples data for protection component calculation, and the backup channel samples data for opening the positive outletSource. Only starting components Only when both the protective component and the dual channel sampling data meet the action requirements, can the outlet be tripped. Otherwise, it cannot be trippedtripping operation.

l Overcurrent protection starting element

When the three-phase current value is greater than 0.95 Operates at times the minimum current setting value. thisThe starting component is used to activate the corresponding overcurrent protection.

l Zero sequence overcurrent protection starting element

When the zero sequence current is greater than 0.95 Operates when the minimum zero sequence current setting value is doubled. This starting element is used to activate the corresponding zero sequence overcurrent protection.

l Overload protection starting element

When the three-phase current value is greater than 0.95 Operates when the overload current setting value is doubled. This starting component is used to open the corresponding overload protection Protect.

l Overcurrent acceleration protection starting element

When the three-phase current value is greater than 0.98 Operates when the overcurrent acceleration setting value is doubled.This startup component is used to activate overcurrent acceleration protection.

l Zero sequence acceleration protection starting element

When the zero sequence current is greater than 0.98 Operates when the zero sequence overcurrent acceleration setting value is doubled. This starting component is used to activate zero sequence acceleration protection.

l Low frequency load shedding protection starting element

When the low-frequency load shedding protection charging is completed and the system frequency is lower than the low-frequency protection low-frequency setting value, and all phase to phase voltages are higher than low When the frequency protection low voltage lock value is activated, this starting element is used to open the low voltageFrequency shedding protection.

l Reclosing starting element

When the reclosing function is activated, the reclosing conditions are not consistentWhen satisfied, this initiating component is used to activate the reclosing function.

1.2 overcurrent protection

This device is equipped with three sections of overcurrent protection and one section of independent overcurrent inverse time protection, each section has independent current and time settingsand Control word. Each section can independently choose whether to use compound voltage locking (low voltage and negative sequence voltage) or directional locking.

On the busbar PT When the wire is disconnected, it can be controlled through the control word“PT Disconnected current protection”Select to exit the current protection of the section at this time for the compound voltage lockout Should the direction be locked to become pure overcurrent protection, or should the current protection be directly exited. The term referred to here“current protection”It refers to those who have invested Current protection section for compound voltage or directional locking. There is no power supply for both voltage and direction lockingThe flow protection segment is not subject to this control The influence of character creation.

overcurrent Section I, overcurrent section II, and overcurrent section III are fixed with definite time protection, and an independent overcurrent inverse time protection is set upThis device Integrated together 3 Over current inverse time limit protection with various characteristics, users can choose according to their needsChoose any type of inverse time protection feature. Overcurrent reverse time The limit protection feature is listed as a fixed value item in the device's fixed value menu“overcurrentInverse time characteristic”.