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1. As the development of electric power system automation and the prevalence of unmanned power station，the requirement to the automaticity of DC power system is getting higher and higher. DC system monitoring and control device based on microprocessor, as the core of DC power system, is designed to meet this kind of requirements and replace men in the maintenance and management of DC power system. Its four functions “remote measure, remote communication, remote control, remote adjust”and battery intelligent management function can fully meet the unmanned and less-manned watch requirements to DC power system for electric power system.

    2 Performance and Features

2.1  The monitoring device adopts the mode of distributed measurement & control and centralized management. This design consideration has the advantages of legible system hiberarchy and the flexibility in capacity enlarging. The device based on microprocessor can fully monitor, measure and control the charger module, battery group, the voltage and insulation resistance to ground of the bus bar, etc.

2.2  The device adopts modularized hardware and software structure. The functions of every part are relatively independent. The system reliability is improved, in the meantime, the maintenance and management of the system is very easy.

2.3  The main control unit adopts 32-bits MCU and embedded multitask operating system. Multiprocessor can coordinated work to improve system efficiency.

2.4  Input unit for on-off signals is integrated in the device, which has 15 input channels, if the owner needs more, another input unit can be provided. The input unit has own CPU and all input channels are isolated by optocoupler，It has the advantages of high efficiency, real-time, high veracity. System reliability is enhanced and maintenance is also very convenient.

2.5  Output unit for on-off is integrated in the device and has seven output channels. DC 24V relay with high drive capability is provided to control DC 220V directly.

2.6  New style man machine interface with touch screen is easy to operate and comprehend, and has abundant on-line help.

2.7  All kind of real-time data, state messages and alarm messages can be displayed integrally. The operating personnel can know the running state of the DC power system in good time and accurately.

2.8  Watchdog is applied in hardware design to monitor the running of the software，in the meantime, its software design adopts software trap technology and significant data multilevel backup technology to guarantee the reliability of the system and the integrality of the data.

2.9  The device provides RS—232, RS—485 and RS—422 interface to communicate with other upper/lower equipments. The owner can select one of them.

2.10 The device has the functions of online diagnosing and self recovery.

I. DC System products:

1. PZ61 Series High-Frequency Switching DC Supply System

(KCVA,PZ23, WCF and PZ32 went out of production for long time since some parts are not available, so it is s ested to upgrade the DC system for the following models with our PZ61-2000:

• KCVA21 thyristor-Controlled Rectifier
• PZ23 Cd-Ni battery DC power supply system
• WCF10 Micro-processor based thyristor-Controlled Rectifier Panel
• PZ32 Lead-Acid Battery DC Power Panel    

1.2 PBD Uninterrupted Power Supply Panel

PBD-2 Backup type; PBD-3 on-line type

1.3 PTD11 DC Supply System for Communication

1.4 PYD10 Integrated DC and AC Power Supply System

1.5 PJD10 Intelligent AC Power Supply Panel

II. Parts and Components:

2.1. High-Frequency Switching Rectifier

ZZG12High-Frequency Switching Rectifier

ZZG13High-Frequency Switching Rectifier

ZZG21High-Frequency Switching Rectifier

ZZG22 High-Frequency Switching Rectifier

ZZG31High-Frequency Switching Rectifier:

ZZG31-10220; ZZG31-20110; ZZG31-10110 (net weight: about 4kg)

ZZG32High-Frequency Switching Rectifier

2.2 Supervisor:

WZCK-11 Microprocessor based D.C. System Monitor Device

WZCK-12 DC System Collective Monitor Module

WZCK-12 DC System Monitor (Monitoring Device)

(WZCK-12W not produced, replaced by WZCK-12A or WZCK-12AW)

WZCK-20 Microcomputer-based DC Monitoring Device

(WZCK-21; WZCK-23; WZCK-24ADC monitoring device)

2.3 Signal Collection Unit

FKR-21 On-off Signal Collection Unit (module)

2.4 Battery Voltage Inspection

FXJ-21 Cell Voltage Inspection Module

FXJ-22 Cell Internal Resistance Inspection Unit

2.5 Charging Controller

FXL-12/FXL-11 Charging Controller (Module)

2.6 Intelligent Transmitter Module

FZB 11 DC voltage transmitter;

FZB 12 DC transmitter

FZB 13 three-phase AC voltage transmitter

FZB 14 single-phase AC voltage transmitter

FZB 15 AC transmitter

FZB 16 temperature transmitter

2.7 Insulation Monitoring Device

FZJ-11 DC Insulation Monitoring Device

FZJ-21 DC Insulation Monitoring Device (for DC busbar)

WZJ-21 DC Insulation Monitoring Device (for DC busbar and branch circuit)

FCT-21 Current Transmitter

WZJ-11A Microprocessor Based DC Insulation Monitor

WZJ-21 Microprocessor Based DC Insulation Monitor

WZJ-31A Digital DC Insulation Monitoring Device

2.8 Battery Detect Device

WXJ-10 Series Micro-Processor Based Battery Monitor (Net Weight: about 5kg)

WXJ-11B Micro-Processor Based Battery Monitor

WXJ-15 Storage Battery Monitoring Equipment (battery Detect Device)

WXJ-16 Battery Monitoring Device

2.9 DC-DC Converter

ZBG11 DC-DC Converter (net weight: 9kg)

ZBG11-10/48; ZBG11-20/48; ZBG11-20/24; ZBG11-30/48; ZBG11-30/24

ZBG13 DC-DC Converter

ZBG31 DCDC Converter (net weight: 3.5 kg)

ZBG31-5048/220; ZBG31-3048/220; ZBG31-3048/220; ZBG31-2048/220; ZBG31-2048/220; ZBG31-3048/110; ZBG31-3048/110; ZBG31-2048/110; ZBG31-2048/110;

2.10 DC/AC Inverter

ZNB15

ZNB21

ZNB23D Series DC/AC Inverter

ZNB23D-1/220v, ZNB23D-2/220, ZNB23D-3/220, ZNB23D-1/110 V and ZNB23D-2/110 V

2.11 Battery Discharge Device

ZFD-1 Battery Discharge Device

2.12 Instruments

DVM05 voltmeter (LED display)

DAM05 Ammeter (LED display)

2.13 ZTY Automatic Voltage Regulating Device