Nanrui Jibao PCS9611CS Line Protection Measurement and Control Device

Nanrui Jibao PCS9611CS Line Protection Measurement and Control Device

1 Performance Characteristics

High performance general-purpose hardware, real-time computing: using a 32-bit high-performance dual core processor, Core 1 completes protection operations and

Export logic, Core 2 implements functions such as event recording, fault recording, human-machine interface, backend communication, and printing. high-performance

The hardware ensures that the device performs real-time calculations on all relays at every sampling interval.

Double sampling: using double sampling and mutual calibration technology, one path is used for calculating the action behavior of protective components, and the other path is used for opening

Release the positive power supply to ensure the reliability of protective sampling and the correctness of protective behavior.

Software modular design: The device provides complete protection functions, and each protective component is designed modularly, independent of each other, and flexible

Active configuration.

Complete communication functions: With flexible communication methods, it can be equipped with 3 100Mbps Ethernet interfaces and 2 RS-485 serial ports,

1 RS-232 printing serial port. Support the communication standard DL/T667-1999 (IEC60870-5-103) and

DL/T860 (IEC61850) supports Modbus RTU and Modbus TCP protocols. Supports 100Mbps, Category 5e

Wire or fiber optic communication interface.

Easy debugging and maintenance: With a friendly human-machine interface and rich PC auxiliary software, it is convenient for device setup and debugging

Auxiliary functions such as data preprocessing. After the entire group is started, it enters the fault calculation program to perform various protection algorithm calculations and trip logic judgments

Wait.

3.1 Analog Input

This device can introduce the following analog quantities: three-phase protection current (Ia, Ib, Ic), three-phase measurement current (Iam, Ibm, Icm)

Three phase bus voltage (Ua, Ub, Uc), synchronous voltage (Ux), zero sequence current (I0). External current input is isolated by an isolation transformer

After transformation, it is passed through a low-pass filter to an analog-to-digital converter, and then sampled by the CPU at regular intervals. The CPU processes the obtained digital signal and constructs

Become various protective relays.

Ia, Ib, Ic are three-phase current inputs for protection purposes; I0 can be used as both zero sequence overcurrent protection (trip or alarm) and small current protection

Input for current grounding line selection; Iam, Ibm, and Icm are three-phase current inputs for measurement purposes; Ua, Ub, Uc are bus voltages, and the voltage can be

Y-shaped access, also known as V-shaped access, is used for protection and measurement in this device. It is calculated together with Iam, Ibm, and Icm to form

The P, Q, COS ф, kWh, kVarh of this interval; Ux is the synchronous voltage, used when there is no voltage in the reclosing circuit.

3.2 Device start-up components

The device has set different starting elements for each protective element, and the corresponding starting elements can only be counted after they are started

Calculate. The device is equipped with dual sampling technology, with the main channel sampling data used for protection component calculation and the backup channel sampling data used for opening the outlet

Positive power supply. Only when both dual channel sampling data meet the action requirements can the outlet be tripped, otherwise it cannot be tripped.

Overcurrent protection starting element: It operates when the maximum value of the three-phase current is greater than 0.95 times the set value. This startup component is used to open the corresponding

Overcurrent protection.

Zero sequence overcurrent protection starting element: It operates when the zero sequence current is greater than 0.95 times the zero sequence current setting value. This startup component is used to open

Corresponding zero sequence overcurrent protection.

Overcurrent acceleration protection starting element: It operates when the maximum value of the three-phase current is greater than 0.95 times the overcurrent acceleration setting value. This startup component is used for

Open up corresponding overcurrent acceleration protection.

Zero sequence acceleration protection starting element: It will activate when the zero sequence current is greater than 0.95 times the zero sequence overcurrent acceleration setting value. This startup component is used for

Open the corresponding zero sequence acceleration protection.

Overload protection starting element: It operates when the maximum value of the three-phase current is greater than 0.95 times the overload current setting value. This startup component is used for

Open corresponding overload protection.

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, the same

When all phase to phase voltages are higher than the low frequency protection low voltage lock value, this starting element is used to open the low frequency load shedding protection.

High frequency disconnection starting element: When the high-frequency disconnection protection is activated and the system frequency is higher than the high-frequency disconnection frequency setting value, and all phase to phase electrical

When the voltage is above 10V, this starting element is used to activate the high-frequency disconnection protection.

Low voltage protection starting element: When the low voltage protection is activated and the bus voltage is below 1.03 times the low voltage setting value, it will start

Nanrui Jibao PCS9611CS Line Protection Measurement and Control Device

The component is used to open low voltage protection.

Overvoltage protection starting element: When the overvoltage protection is activated and the bus voltage is 0.97 times higher than the overvoltage setting value, it will start

The component is used to activate overvoltage protection.

Zero sequence overvoltage protection starting element: When the zero sequence overvoltage protection is activated and the bus zero sequence self-produced voltage is 0.97 times higher than the zero sequence overvoltage setting value

When activated, this starting element is used to activate zero sequence voltage protection.

Reclosing starting element: When the reclosing function is activated and the inconsistent reclosing conditions are met, this starting element will act

Open the reclosing function.

3.3 Overcurrent protection

This device is equipped with three sections of timed overcurrent protection and one section of independent overcurrent inverse time protection. Each section has independent current and time settings

Values and control words. Each section can independently choose whether to use compound voltage locking (low voltage and negative sequence voltage) or directional locking.

When the bus PT is disconnected, the control word "PT disconnection current protection" can be used to select the compound voltage interlock and current protection for current protection to be exited at this time

Should the overcurrent protection be opened by directional locking, or should the current protection be directly locked. The 'current protection' referred to here refers to those that have been activated

Current protection section with pressure or direction locking. The current protection section that does not have either reverse voltage locking or directional locking is not subject to this control

Word influence.

The overcurrent section I, overcurrent section II, and overcurrent section III are fixed as timed protection, and an independent overcurrent inverse time protection is set up. This device

It integrates three types of overcurrent inverse time protection features, and users can choose any one of them according to their needs. Overcurrent reverse time

The limit protection feature is set through the setting item [overcurrent inverse time limit action curve type] in the device setting menu.